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Original Article:
Distribution of cytokine gene single nucleotide polymorphisms among a multi-ethnic Iranian population
Zana Karimi Kurdistani, Samaneh Saberi, Yeganeh Talebkhan, Akbar Oghalaie, Maryam Esmaeili, Nazanin Mohajerani, Maryam Bababeik, Parisa Hassanpour, Shaghik Barani, Ameneh Farjaddoost, Fatemeh Ebrahimzadeh, Jean Trejaut, Marjan Mohammadi
Adv Biomed Res
2015, 4:160 (31 July 2015)
DOI
:10.4103/2277-9175.161809
PMID
:26436076
Background:
Cytokine gene single nucleotide polymorphisms (SNPs) are widely used to study susceptibility to complex diseases and as a tool for anthropological studies.
Materials and Methods:
To investigate cytokine SNPs in an Iranian multi-ethnic population, we have investigated 10 interleukin (IL) SNPs (IL-1β (C-511T, T-31C), IL-2 (G-384T), IL-4 (C-590T), IL-6 (G-174C), IL-8 (T-251A), IL-10 (G-1082A, C-819T, C-592A) and tumor necrosis factor-alpha (TNF-α) (G-308A) in 415 Iranian subjects comprising of 6 different ethnicities. Allelic and genotypic frequencies as well as Hardy-Weinberg equilibrium (HWE) were calculated by PyPop software. Population genetic indices including observed heterozygosity (H
o
), expected heterozygosity (H
e
), fixation index (F
IS
), the effective number of alleles (
N
e
) and polymorphism information content (PIC) were derived using Popgene 32 software. Multidimensional scaling (MDS) was constructed using Reynold's genetic distance obtained from the frequencies of cytokine gene polymorphism.
Results:
Genotypic distributions were consistent with the HWE assumptions, except for 3 loci (IL-4-590, IL-8-251 and IL-10-819) in Fars and 4 loci (IL-4-590, IL-6-174, IL-10-1082 and TNF-α-308) in Turks. Pairwise assessment of allelic frequencies, detected differences at the IL-4-590 locus in Gilakis versus Kurds (
P
= 0.028) and Lurs (
P
= 0.022). Mazanis and Gilakis displayed the highest (H
o
= 0.50 ± 0.24) and lowest (H
o
= 0.34 ± 0.16) mean observed heterozygosity, respectively.
Conclusions:
MDS analysis of our study population, in comparison with others, revealed that Iranian ethnicities except Kurds and Mazanis were tightly located within a single cluster with closest genetic affinity to Europeans.
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Original Article:
Partial purification and biochemical characterization of peroxidase from rosemary (
Rosmarinus officinalis
L.) leaves
Zahra Aghelan, Seyed Ziyaedin Samsam Shariat
Adv Biomed Res
2015, 4:159 (27 July 2015)
DOI
:10.4103/2277-9175.161586
PMID
:26380244
Background:
In this study, it is aimed to purify POD from leaves of
Rosmarinus officinalis
L. and determine its some biochemical properties. PODs are a group of oxidoreductase enzymes that catalyze the oxidation of a wide variety of phenolic compounds in the presence of hydrogen peroxide as an electron acceptor.
Materials and Methods:
In this investigation, POD was purified 9.3-fold with a yield of 32.1% from the leaves of Rosemary by ammonium sulfate precipitation and ion-exchange chromatography. The enzyme biochemical properties, including the effect of pH, temperature and ionic strength were investigated with guaiacol as an electron donor. For substrate specificity investigation of the enzyme, Michaelis constant and the maximum velocity of an enzymatic reaction values for substrates guaiacol and 3,3Ͳ, 5,5Ͳ-TetraMethyle-Benzidine were calculated from the Lineweaver-Burk graphs.
Results:
The POD optimum pH and temperature were 6.0 and 40°C. The POD activity was maximal at 0.3 M of sodium phosphate buffer concentration (pH 6.0). Sodium dodecyl sulphate polyacrylamide gel electrophoresis was performed for molecular weight (M
w
) determination and M
w
of the enzyme was found to be 33 kDa. To investigate the homogeneity of the POD, native-PAGE was done and a single band was observed.
Conclusion:
The stability against high temperature and extreme pH demonstrated that the enzyme could be a potential POD source for various applications in the medicine, chemical and food industries.
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Original Article:
Effect of Γ-aminobutyric acid on kidney injury induced by renal ischemia-reperfusion in male and female rats: Gender-related difference
Marzieh Vafapour, Mehdi Nematbakhsh, Ramesh Monajemi, Safoora Mazaheri, Ardeshir Talebi, Nahid Talebi, Soheyla Shirdavani
Adv Biomed Res
2015, 4:158 (27 July 2015)
DOI
:10.4103/2277-9175.161585
PMID
:26380243
Background:
The most important cause of kidney injury is renal ischemia/reperfusion injury (IRI), which is gender-related. This study was designed to investigate the protective role of Γ-aminobutyric acid (GABA (against IRI in male and female rats.
Materials and Methods:
Thirty-six female and male wistar rats were assigned to six experimental groups. The IRI was induced by clamping renal vessels for 45 min then was performed reperfusion for 24 h. The group sex posed to IRI were pretreated with GABA and were compared with the control groups.
Results:
Serum levels of creatinine and blood urea nitrogen, kidney weight, and kidney tissue damage score increased in the IRI alone groups, (
P
< 0.05), while GABA decreased these parameters in female significantly (
P
< 0.05), but not in male rats. Uterus weight decreased significantly in female rats treated with GABA. Testis weight did not alter in male rats. Serum level of nitrite and kidney level of malondialdehyde (MDA) had no significant change in both female and male rats. Kidney level of nitrite increased significantly in female rats experienced IRI and serum level of MDA increased significantly in males that were exposed to IRI (
P
< 0.05).
Conclusion:
GABA could ameliorate kidney injury induced by renal IRI in a gender dependent manner.
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Original Article:
Music therapy: An effective approach in improving social skills of children with autism
Seyyed Nabiollah Ghasemtabar, Mahbubeh Hosseini, Irandokht Fayyaz, Saeid Arab, Hamed Naghashian, Zahra Poudineh
Adv Biomed Res
2015, 4:157 (27 July 2015)
DOI
:10.4103/2277-9175.161584
PMID
:26380242
Background:
The existing methodological weakness in conducted researches concerning music therapy (MT) for children with autism led to ambiguity and confusion in this scope of studies. The aim of the present research is to identify the effectiveness of MT method in improving social skills of children with autism and its stability, as well.
Materials and Methods:
In the form of a clinical trial study with design of pretest/posttest/follow-up with control group, among the children with autism in community of Tehran city, on the basis of childhood autism rating scale, 27 children with mild to moderate autism were chosen and were divided into two groups of experiment (
n
= 13), and control (
n
= 14). Social skills' level of both groups was measured and recorded with the help of social skills rating system scale. The children of the experiment group participated in MT programs of Orff-Schulwerk for 45 days in 12 sessions (two sessions of 1-h/week), whereas the control group received no intervention. The data were analyzed with Statistic Package For Social Science (SPSS) software
t
-test and analysis of covariance was used to compare groups.
Results:
In posttest, the results of covariance analysis showed a significant increase in social skills' scores of the experiment group (
P
< 0.001). Also, results of the paired-sample
t
-test showed that the effectiveness of MT has been persistent up to the follow-up phase.
Conclusions:
The study showed that MT is an effective method with deep and consistent effects on improving social skills of children with autism.
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Original Article:
Genetic characterization of Pseudomonas aeruginosa-resistant isolates at the university teaching hospital in Iran
Hossein Fazeli, Hooman Sadighian, Bahram Nasr Esfahani, Mohammad Reza Pourmand
Adv Biomed Res
2015, 4:156 (27 July 2015)
DOI
:10.4103/2277-9175.161583
PMID
:26380241
Background:
Pseudomonas aeruginosa
is an opportunistic pathogen that is commonly responsible for nosocomial infections. The aim of this study was to perform a genotyping analysis of the
Pseudomonas aeruginosa
-resistant isolates by the multilocus sequence typing (MLST) method at the university teaching hospital in Iran.
Materials and Methods:
Antimicrobial susceptibility was analyzed for
P. aeruginosa
isolates. Ceftazidime-resistant (CAZ
res
) isolates with a positive double-disc synergy test were screened for the presence of extended-spectrum β-lactamase-encoding genes. Phenotypic tests to detect the metallo-β-lactamase strains of
P. aeruginosa
were performed on imipenem-resistant (IMP
res
) isolates. Selected strains were characterized by MLST.
Results:
Of 35
P. aeruginosa
isolates, 71%, 45% and 45% of isolates were CAZ
res
, IMP
res
and multidrug resistant (MDR), respectively. Fifty-seven percent of the isolates carried the
bla
OXAgroup-1
. All the five typed isolates were ST235. Isolates of ST235 that were MDR showed a unique resistance pattern.
Conclusion:
This study shows a high rate of MDR
P. aeruginosa
isolates at the university teaching hospital in Iran. It seems MDR isolates of
P. aeruginosa
ST235 with unique resistance pattern disseminated in this hospital.
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Original Article:
Survey of the detoxification effect of green tea extract on the reproductive system in rats exposed to lead acetate
Najmeh Sha'bani, Sepideh Miraj, Mahmoud Rafieian-kohpayei, Abdul Rasool Namjoo
Adv Biomed Res
2015, 4:155 (27 July 2015)
DOI
:10.4103/2277-9175.161582
PMID
:26380240
Background:
Lead poisoning has been an old but perpetual public health problem in developing countries. Lead has an adverse effect on fertility, and this study aimed to examine the effect of consuming green tea extract (GTE) on fertility parameters in rats exposed to lead.
Materials
and
Methods:
In this experimental study, 70 rats have been classified, as it is described later, into 4 groups of 10 and were studied over 2 months. Group 1: Normal diet and tap water; Group 2: 10 mg/kg intraperitoneal lead acetate weekly over 8 weeks; Group 3: Lead acetate + 100 mg/kg green tea, Group 4: Extract green tea. Distal epididymal sperm samples were collected to assess the sperm counts, motility, and morphology. Testicular tissue and blood level of testosterone were also studies. Data were analyzed by SPSS-17 software using ANOVA and independent
t
-test with a significant level of 0.05.
Results:
The rats exposed to lead acetate had the lowest weight, and green tea had the highest weight. Green tea consumption in rats exposed to lead, reduced the effect of lead and the difference in mean body weight in these rats, compared to other groups, was minimized (
P
< 0.05). The group exposed to lead acetate had the highest sperm abnormalities, and the lowest sperm abnormalities were observed in groups taking green tea.
Conclusion:
Consumption of green tea can reduce the adverse effects of lead, and also can effectively prevent fertility reduction.
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Original Article:
Immunohistochemical (Ki-67) study of endometrial maturation in mice after use of phosphodiesterase type 5 inhibitor
Bahman Rashidi, Jafar Soleimani Rad, Leila Roshangar Rad
Adv Biomed Res
2015, 4:154 (27 July 2015)
DOI
:10.4103/2277-9175.161581
PMID
:26380239
Background
: Uterine receptivity for the implantation is a complicated process, that ovarian factors (hormonal), endometrium and embryo simultaneously are involved in this phenomenon. A successful implantation needs appropriate development of the endometrium. Furthermore, embryo must be capable of reacting with the endometrium and producing suitable adhesion molecules. This study aimed to examine one of endometrial maturation indices in mice before implantation, i.e., proliferation of stromal cells.
Materials
and
Methods:
A total of 40 adult female mice were divided into four groups: Control, gonadotropin, gonadotropin + progesterone, and gonadotropin + sildenafil citrate. The three experimental groups were first injected 7.5 IU of human chorionic gonadotropin (HCG) and then 7.5 IU of human menopausal gonadotropin (HMG). Then, every two female mice were placed in a cage with a male mouse for mating. Two groups were injected 1 mg of progesterone and 3 mg/kg of sildenafil citrate at intervals of 24, 48, and 72 h after injection of HMG. After 96 h, all the mice were killed, and their uterine samples subjected to tissue passage and prepared for analysis. Immunohistochemical method, Ki-67, and stromal mitotic cell count were used in this study.
Results:
Our observations in all groups showed changes in the luminal epithelium. ANOVA analysis Ki-67-positive stromal cells among all groups were not statistically significant.
Conclusion:
The results showed that administration of HMG and HCG following that of progesterone and sildenafil citrate could change the indices of endometrial maturation, and they were not involved in the phase immediately before implantation in stromal mitotic index.
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Original Article:
The effect of preemptive pudendal nerve block on pain after anterior and posterior vaginal repair
Safoura Rouholamin, Mitra Jabalameli, Mostafa Abedi
Adv Biomed Res
2015, 4:153 (27 July 2015)
DOI
:10.4103/2277-9175.161580
PMID
:26380238
Background:
Anterior and posterior vaginal repair (APR) is a common surgery for women with prolapse of pelvic organs which creates post-operative pain because of damage of tissues that we should manage and control this pain. For this purpose, this study was conducted in order to evaluate the effect of preemptive pudendal nerve block on post-operative pain in anterior and posterior vaginal wall repair.
Materials and Methods:
In a double-blinded clinical trial study, 60 women candidates of APR were randomly divided to two groups. In both of them was injected 0.3 cc/kg bupivacaine 0.25% for the intervention group or normal saline for the control group in pudendal nerve tract with the guide of nerve stimulator. A visual analog scale was used to measure pain during the first 48 h after the surgery. Data were analyzed by repeated measures analysis of variance (ANOVA).
Results:
Compared with the intervention group, the control group experienced greater pain during rest and walking. There were significant differences between the two groups from the first post-operative hour (
P
= 0.003) until 48 h after the operation (
P
= 0.021). Furthermore, the mean ± SD values of pain in the sitting position was not significantly different between control and intervention groups at the same time (
P
= 0.340).
Conclusion:
Preemptive pudendal nerve block can reduce post-operative pain score in anterior and posterior vaginal wall repair and this method was suggested in anterior and posterior vaginal wall repair.
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Original Article:
Molecular typing of Iranian mycobacteria isolates by polymerase chain reaction-restriction fragment length polymorphism analysis of 360-bp
rpoB
gene
Shima Hadifar, Sharareh Moghim, Hossein Fazeli, Hajieh GhasemianSafaei, Seyed Asghar Havaei, Fariba Farid, Bahram Nasr Esfahani
Adv Biomed Res
2015, 4:152 (27 July 2015)
DOI
:10.4103/2277-9175.161579
PMID
:26380237
Background:
Diagnosis and typing of
Mycobacterium
genus provides basic tools for investigating the epidemiology and pathogenesis of this group of bacteria. Polymerase chain reaction (PCR)-restriction fragment length polymorphism analysis (PRA) is an accurate method providing diagnosis and typing of species of mycobacteria. The present study is conducted by the purpose of determining restriction fragment profiles of common types of mycobacteria by PRA method of
rpoB
gene in this geographical region.
Materials and Methods:
Totally 60 clinical and environmental isolates from February to October, 2013 were collected and subcultured and identified by phenotypic methods. A 360 bp fragment of the
rpoB
gene amplified by PCR and products were digested by MspI and HaeIII enzymes.
Results:
In the present study, of all mycobacteria isolates identified by PRA method, 13 isolates (21.66%) were
Mycobacterium
tuberculosis
, 34 isolates (56.66%) were rapidly growing Nontuberculosis Mycobacteria (NTM) that including 26 clinical isolates (43.33%) and 8 environmental isolates (13.33%), 11 isolates (18.33%) were clinical slowly growing NTM. among the clinical NTM isolates,
Mycobacterium
fortuitum
Type I with the frequency of 57.77% was the most prevalent type isolates. Furthermore, an unrecorded of the PRA pattern of
Mycobacterium conceptionense
(HeaIII: 120/90/80, MspI: 120/105/80) was found. This study demonstrated that the PRA method was high discriminatory power for identification and typing of mycobacteria species and was able to identify 96.6% of all isolates.
Conclusion:
Based on the result of this study,
rpoB
gene could be a potentially useful tool for identification and investigation of molecular epidemiology of mycobacterial species.
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Original Article:
Evaluation of the circulating CD34
+
, CD309
+
, and endothelial progenitor cells in patients with first attack of optic neuritis
Masoud Etemadifar, Leila Dehghani, Hamid Ganji, Reza Soleimani, Maedeh Talebi, Nahid Eskandari, Fazel Sahraneshin Samani, Rokhsareh Meamar
Adv Biomed Res
2015, 4:151 (27 July 2015)
DOI
:10.4103/2277-9175.161578
PMID
:26380236
Background:
Endothelial progenitor cells (EPCs) are present in circulation and contribute to vasculogenesis in adults. The aim of the present study was to determine the number of circulating EPCs in patients with optic neuritis (ON).
Materials and Methods
: Fifty patients with ON were diagnosed by expert neurologist and optometrist at the Feiz Hospital, Isfahan, Iran (2012-2013). Blood samples were collected from ON patients in the first attack. The number of EPCs was measured by flow cytometry through the assessment of CD34
+
and CD309
+
in patients and healthy individuals.
Results
: With using flow cytometry, CD34
+
and CD309
+
cells detected in peripheral blood cells of patients (
n
= 50) with ON, and healthy individuals (
n
= 30). Patients with ON had (mean = 66.71 ± 17.82) CD34
+
and CD309
+
cells compared with healthy controls (mean = 28.72 ± 22.46). In addition, there was no significant difference in CD309
+
cells in both groups.
Conclusion:
This study showed elevated CD34
+
and CD309
+
cells in the early stage of the disease. Regarded to EPC increment in neural repair, it expected the EPC level be increased in these patients, but no detectable differences were observed among both markers in healthy and patient with first attack.
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Original Article:
Effects of repeated treatment with cholecystokinin sulfated octapeptide on passive avoidance memory under chronic restraint stress in male rats
Malihe Sadeghi, Maryam Radahmadi, Parham Reisi
Adv Biomed Res
2015, 4:150 (27 July 2015)
DOI
:10.4103/2277-9175.161577
PMID
:26380235
Background:
Cholecystokinin (CCK), a peptide hormone found in the gut is the most abundant peptide neurotransmitter in the brain as well, and its effects on learning, memory, and anxiety have been shown. However, it is not clear whether this substance acts as a mediator for anxiety and stress induction or inhibits them. Hence, the purpose of this study was to evaluate the effects of CCK on memory function under stress conditions.
Materials
and
Methods:
Male Wistar rats were divided into four groups: The control, the control-CCK, the stress, and stress-CCK. To induce stress, the rats were placed within adjustable restraint chambers for 6 h daily, for 24 days. CCK-8S (cholecystokinin sulfated octapeptide was injected before induction of stress (1.6 μg/kg, intraperitoneal) for 24 days. Passive avoidance learning test was used for evaluation of learning and memory. Rats received foot electrical shock before stress induction and CCK injection and step through latencies were evaluated 1-day after the last session of stress and treatments.
Results:
Stress impaired memory significantly (
P
< 0.05). Although CCK
per
se
decreased memory (
P
< 0.05), it prevented the memory impairments in the stress group as there was no significant difference between the control and stress-CCK groups.
Conclusion:
Stress has a profound effect on cognition and CCK probably acts as a mediator for its action. Our results showed that a high concentration of CCK during stress may be helpful in alleviating the effects of stress on the brain.
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Original Article:
Isolation, cloning, and expression of
E. coli
BirA gene for biotinylation applications
Mohammad Hossein Etemadzadeh, Arash Arashkia, Farzin Roohvand, Dariush Norouzian, Kayhan Azadmanesh
Adv Biomed Res
2015, 4:149 (27 July 2015)
DOI
:10.4103/2277-9175.161576
PMID
:26380234
Background:
The key enzyme in biotin-(strept) avidin systems,
Escherichia coli
BirA biotin ligase, is currently obtained by overexpression of the long protein-tagged versions of the gene to prevent its toxic effect in
E. coli.
Herein we describe a rather simple and efficient system for expression of
E. coli
BirA without the application of long-tag proteins.
Materials and Methods:
The coding sequence of BirA gene was isolated by polymerase chain reaction using DNA extract of
E. coli
-DH5α as template. BirA amplicon harboring a GS-linker at its C-terminal was cloned into
Nde
I-
Xho
I sites of pET24a(+) vector under control of
T7
promoter and upstream of the vector-derived 6xHis-tag. pET24-BirA transformed BL21-cells were induced for protein expression by IPTG and analyzed by SDS-PAGE and Western blotting. Protein expression yields were assessed by image analysis of the SDS-PAGE scans using ImageJ software.
Result:
Agarose gel electrophoresis indicated proper size of the BirA gene amplicon (963 bp) and accuracy of the recombinant pET24-BirA construct. Sequence alignment analysis indicated identical sequence (100%) of our isolate with that of the standard
E. coli
-K12 BirA gene sequence (accession number: NC_000913.3). SDS-PAGE and Western blot results indicated specific expression of the 36.6 kDa protein corresponding to the BirA protein. Image analysis estimated a yield of 12% of total protein for the BirA expression.
Conclusions:
By application of pET24a(+) we achieved relatively high expression of BirA in
E. coli
without application of any long protein-tags. Introduction of the present expression system may provide more readily available source of BirA enzyme for (strept) avidin-biotin applications and studies.
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Original Article:
Cigarette smoking effect on human cochlea responses
Mehrdad Rogha, Mostafa Hashemi, Narges Askari, Seyed Hamidreza Abtahi, Mahsa Sepehrnejad, Mohammadhasan Nilforoush
Adv Biomed Res
2015, 4:148 (27 July 2015)
DOI
:10.4103/2277-9175.161575
PMID
:26380233
Background:
Smoking is one of the most important risk factor in increasing of non-communicable disorders, especially chronic diseases such as cancer, stroke, heart and respiratory diseases. Cigarette smoking could damage the cochlea and causing hearing loss. The otoacoustic emission (OAE) is a source of information for determining cochlear responses to sound stimuli and how to change the response of the auditory system in some diseases. OAE test was sensitive to outer hair cells (OHCs) activity.
Materials
and
Methods:
In this study, tried to evaluate a hearing threshold of the smoker group versus non-smoker ones through pure tone audiometery, transient evoked otoacoustic emission (TEOAE) and distortion product otoacoustic emission (DPOAE) tests.
Results:
The results indicated that significant decrement of 8000 Hz threshold, reduced DPOAE/TEOAE amplitude in the smoker group than non-smoker one (
P
< 0.05). DPOAE amplitudes decline reflects the cochlear damage caused by smoking.
Conclusion:
OAEs test was clinically non-invasive, accurate, and objective evaluation of the performance of cochlear OHCs.
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Original Article:
Thermoanalytical characterization of clindamycin-loaded intravitreal implants prepared by hot melt extrusion
Lana Tamaddon, Seyed Abolfazl Mostafavi, Reza Karkhane, Mohammad Riazi-Esfahani, Farid Abedin Dorkoosh, Morteza Rafiee-Tehrani
Adv Biomed Res
2015, 4:147 (27 July 2015)
DOI
:10.4103/2277-9175.161563
PMID
:26322295
Background:
The aim of the present study was to evaluate a non-destructive fabrication method in for the development of sustained-release poly (L, D-lactic acid)-based biodegradable clindamycin phosphate implants for the treatment of ocular toxoplasmosis.
Materials and Methods:
The rod-shaped intravitreal implants with an average length of 5 mm and a diameter of 0.4 mm were evaluated for their physicochemical parameters. Scanning electron microscopy (SEM), differential scanning calorimetry (DSC), Fourier-transform infrared (FTIR), and nuclear magnetic resonance (1H NMR) studies were employed in order to study the characteristics of these formulations.
Results:
Drug content uniformity test confirmed the uniformity in different implant batches. Furthermore, the DSC, FTIR, and 1H NMR studies proved that the fabrication process did not have any destructive effects either on the drug or on the polymer structures.
Conclusion:
These studies showed that the developed sustained-release implants could be of interest for long-term sustained intraocular delivery of clindamycin, which can provide better patient compliance and also have good potential in terms of industrial feasibility.
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Original Article:
Mobile phones: Reservoirs for the transmission of nosocomial pathogens
Shekhar Pal, Deepak Juyal, Shamanth Adekhandi, Munesh Sharma, Rajat Prakash, Neelam Sharma, Amit Rana, Ashwin Parihar
Adv Biomed Res
2015, 4:144 (27 July 2015)
DOI
:10.4103/2277-9175.161553
PMID
:26322292
Background:
Global burden of hospital-associated infection (HAI) is on the rise and contributes significantly to morbidity and mortality of the patients. Mobile phones are indispensible part of communication among doctors and other health care workers (HCWs) in hospitals. Hands of HCWs play an important role in transmission of HAI and mobile phones which are seldom cleaned and often touched during or after the examination of patients without hand washing can act as a reservoir for transmission of potent pathogens. This study aimed to investigate the rate of bacterial contamination of mobile phones among HCWs in our tertiary care hospital and to compare it with personal mobile phones of non-HCWs (control group).
Materials and Methods:
The mobile phones and dominant hands of 386 participants were sampled from four different groups, hospital doctors and staff (132), college faculty and staff (54), medical students (100) and control group (100). Informed consent and questionnaire was duly signed by all the participants. Samples were processed according to standard guidelines.
Results:
316 mobile phones (81.8%) and 309 hand swab samples (80%) showed growth of bacterial pathogens. The most predominant isolates were Coagulase-negative
Staphylococcus
,
Staphylococcus aureus
,
Acinetobacter
species,
Escherichia coli
,
Klebsiella pneumoniae, Pseudomonas
species
and Enterococcus
species.
Conclusion:
Hundred percent contamination was found in mobile phones and hands of HCWs indicating mobile phones can be the potential source of nosocomial pathogens. Our study results suggest that use of mobile phones in health care setup should be restricted only for emergency calls. Strict adherence to infection control policies such as proper hand hygiene practices should be followed.
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Original Article:
Adding diclofenac to Helicobacter pylori eradication regimen
Mohammad Hasan Emami, Akbar Arjmandpour, Hamed Daghaghzadeh, Hojatollah Rahimi, Ali Toghiani, Peyman Adibi
Adv Biomed Res
2015, 4:143 (27 July 2015)
DOI
:10.4103/2277-9175.161551
PMID
:26322291
Background:
Helicobacter pylori
colonizes not only on the surface of mucous membrane, but also beneath the surface mucous gel layer (SMGL). As diclofenac Na decreases the secretion of SMGL, in this study we examined this drug as an adjuvant therapy to a quadruple therapy for
H. Pylori
eradication.
Materials and Methods:
One hundred and seventy-two patients were randomly assigned to three groups. Fifty four patients received quadruple therapy, that is, azithromycine 250 mg, amoxicillin 500 mg, bismuth subcitrate 240 mg, and omeprazole 20 mg bid for 1 week (group A) and 65 patients received the same dosage of those agents plus diclofenac Na tab, 100 mg daily for 1 week (group B). Sixty two patients received the quadruple therapy for 2 weeks (group C). Eradication of the infection was assessed 4-6 weeks after completion of treatment by stool antigen assay for
H. pylori
.
Results:
While the rate of
H. pylori
eradication in the groups A and B was 66.7% and 82.1%, respectively (
P
= 0.062), the rate of
H. pylori
eradication in groups B and C were 82.1% and 82.3% respectively (
P
= 0.987).
Conclusions:
It seems that diclofenac Na can shorten anti-
H. pylori
regimens for 1 week. More investigations are needed for more clarification of the efficacy of NSAIDs for successful eradication of
H. pylori
. (IRCT code: IRCT201204059256N2)
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Original Article:
In silico design and analysis of a new hyperglycosylated analog of erythropoietin to improve drug efficacy
Anvarsadat Kianmehr, Hamid Shahbaz Mohammadi, Mohammad Ali Shokrgozar, Eskandar Omidinia
Adv Biomed Res
2015, 4:142 (27 July 2015)
DOI
:10.4103/2277-9175.161548
PMID
:26322290
Background:
The enhancement of glycosylation by applying glycoengineering approaches has become widely used to boost properties for protein therapeutics. The objective of this work was to engineer a new hyperglycosylated analog of erythropoietin (EPO) with appropriately targeted N-linked carbohydrates through bioinformatics tools.
Materials and Methods:
The EPO protein sequence was retrieved from NCBI protein sequence database. Prediction of N-glycosylation sites for the target protein was done using the prediction server, NetNGlyc. The three-dimensional model of glycoengineered EPO (named as kypoetin) was constructed using the homology modeling program. Ramchandran plot obtained from PROCHECK server was used to check stereochemical property. Meanwhile, 3D model of kypoetin with attached N-carbohydrates was built up using the GlyProt server.
Results:
In the new modified analog, three additional N-glycosylation sites at amino-acid positions 30, 34 and 86 were inserted. Ramchandran plot analysis showed 81.6% of the residues in the most favored region, 15.6% in the additional allowed, 1.4% in the generously allowed regions and 1.4% in the disallowed region. 3D structural modeling showed that attached carbohydrates were on the proper spatial position. The whole solvent accessible surface areas of kypoetin (15132.69) were higher than EPO (9938.62).
Conclusions:
Totally, various model evaluation methods indicated that the glycoengineered version of EPO had considerably good geometry and acceptable profiles for clinical studies and could be considered as the effective drug.
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Original Article:
The influence of impact delivery mode, lactation time, infant gender, maternal age and rural or urban life on total number of
Lactobacillus
in breast milk Isfahan - Iran
Mansoureh Taghizadeh, Maryam Mirlohi, Farkhondeh Poursina, Golnoush Madani, Mehri Khoshhali, Nimah Bahreini, Hajieh Ghasemian Safaei
Adv Biomed Res
2015, 4:141 (27 July 2015)
DOI
:10.4103/2277-9175.161546
PMID
:26322289
Background:
Breast milk is known as the most crucial postpartum issue in metabolic and immunologic programming of neonatal health. Human milk microbial changes over Lactation. The factors influencing the milk microbiome as well as potential impact of microbes on infant health have not yet been discovered. The objective was to identify pre- and post-natal factors that can potentially influence the bacterial communities inhabiting human milk.
Materials and Methods:
Breast milk samples (
n
= 40) with all full-term breastfed infants were collected from lactating randomized. Information on personal characteristics, dietary habits, information about infants were collected after birth. The samples were plated with serial dilutions on three selective culture media man rogosa sharp and then colonies were counted. Colonies tested for catalase reaction, Gram-staining and microscopic examination.
Results:
The result of this study showed that the overall incidence of positive
Lactobacillus
in mother's milk was 87.5%. The results based on (infant gender, mode of delivery, rural or urban and lactation time) rural or urban and lactation time were significant (
P
< 0.05). The results showed that all of the variables were significant in this regression model (
P
< 0.001). The median of log
10
Lactobacillus
counts in rural mothers, vaginal delivery, infant male gender and Lactation time for first 3-month were meaningfully high.
Conclusions:
The findings of this study about the breast milk
Lactobacillus
potential probiotic bacteria of healthy Iranian mothers, suggested that the breast milk microbiome is significantly influenced by several factors, mode of delivery, rural or urban and lactation time.
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Original Article:
SIX1
overexpression in diffuse-type and grade III gastric tumors: Features that are associated with poor prognosis
Modjtaba Emadi-Baygi, Parvaneh Nikpour, Elaheh Emadi-Andani
Adv Biomed Res
2015, 4:139 (27 July 2015)
DOI
:10.4103/2277-9175.161540
PMID
:26322287
Background:
Gastric cancer is the second most common cancer worldwide. In Iran, the incidence of gastric cancer is well above the world average, and is the first common cancer in Iranian men and the third one in women. Located at chromosome 14q23,
SIX1
is a homolog of the Drosophila 'sine oculis' (so) gene and is highly conserved in numerous species. In addition to the role of SIX1 in the development, its expression is frequently dysregulated in multiple cancers. This study aimed to evaluate the clinicopathological features of the expression of
SIX1
gene in gastric adenocarcinoma.
Materials and Methods:
Thirty pairs of gastric tissue samples from patients with gastric adenocarcinoma were evaluated for
SIX1
gene expression using quantitative real-time polymerase chain reaction. A paired
t
-test or one-way ANOVA with
post hoc
multiple comparisons were used to analyze the differences between groups. Statistical significance was defined as
P
≤ 0.05.
Results:
SIX1 expression was decreased in tumoral samples. However, its expression increased significantly in diffuse-type gastric cancer. Furthermore, there was a trend toward statistical significance in increasing SIX1 gene expression with higher grades. Of note, the difference was significant between grades I and III.
Conclusions:
The results suggest that
SIX1
gene expression might be used in the future as a potential biomarker to predict the outcome of the disease as diffuse-type and grade III of gastric tumors are associated with poor prognosis.
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Original Article:
Can we define severity of carpal tunnel syndrome by ultrasound?
Majid Ghasemi, Fatemeh Abrishamchi, Keivan Basiri, Rokhsareh Meamar, Majid Rezvani
Adv Biomed Res
2015, 4:138 (27 July 2015)
DOI
:10.4103/2277-9175.161537
PMID
:26322286
Background:
Carpal tunnel syndrome (CTS) is a common entrapment neuropathy. Diagnosis of CTS is usually based on a combination of clinical symptoms and electrodiagnostic study (EDS). Ultrasonography (US) also has been shown to be a useful diagnostic tool in CTS and is based on an increase in the median nerve cross-sectional area (CSA) at the level of the pisiform bone. In this study we assessed findings in US in correlation with severity of CTS.
Materials and Method:
This was a cross-sectional case-control study, which was carried out on November 2012 to July 2013. Subjects were chosen from patients who referred to the Alzahra Hospital (Isfahan, Iran). Patients were classified as having mild, moderate, and severe CTS according to EDS and high-resolution US was performed for CSA measurement at the tunnel inlet.
Results:
A total of 87 individuals screened and 52 subjects (81 hands) met all inclusion and no exclusion criteria. The mean ± SD of the CSA was 0.12 ± 0.03 cm
2
(range, 0.08-0.18) in mild, 0.15 ± 0.03 cm
2
(range, 0.08-0.19) in moderate, and 0.19 ± 0.06 cm
2
(range, 0.11-0.32) in severe CTS. We detected a significant correlation between MN CSA and the severity of CTS (
P
< 0.001).
Conclusion
: In conclusion it is expected that sonography may serve as an additional or complementary method which is useful and reliable in assessing the severity of CTS.
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Original Article:
Buccinator flap as a method for palatal fistula and VPI management
Hosein Abdaly, Mahmood Omranyfard, Mehdy Rasty Ardekany, Kamran Babaei
Adv Biomed Res
2015, 4:135 (27 July 2015)
DOI
:10.4103/2277-9175.161529
PMID
:26322283
Background:
Secondary palatal fistula and velopharyngeal insufficiency (VPI) are two major complications of palatoplasty. Various methods have been introduced for surgical repair of these complications; however, most of them are associated with a high recurrence rate and morbidity. This study was designed to evaluate the use of the buccinator myomucosal flap in the reconstruction of palatal fistula and velopharyngeal insufficiency following primary palatoplasty.
Materials and Methods:
This study was performed on 25 patients who had either secondary palatal fistula or velopharyngeal insufficiency. Their defects were repaired by buccinator myomucosal flaps (BMFs). Patients were followed for 8 weeks and follow-up visits were arranged at 1, 2, 4, and 8 weeks after discharge.
Results:
All BMFs were harvested and transposed successfully. The length of the soft palate increased 15.14 ± 1.13 mm postoperatively. One patient (4%) had flap dehiscence 6 days after the operation with no flap ischemia or necrosis. Another patient (4%) experienced recurrence of the palatal fistula with marginal necrosis of the BMF 6 weeks after the operation. Otherwise, no case of fistula recurrence, infection, flap ischemia or necrosis and donor-site morbidity was observed during follow-up sessions.
Conclusion:
This study demonstrated that using BMFs could be a safe, effective and promising method of treatment for post palatoplasty fistula and VPI. However, further investigations on a larger sample size with longer follow-up are recommended for more accurate conclusion.
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Original Article:
Protective effects of forced exercise against methylphenidate-induced anxiety, depression and cognition impairment in rat
Majid Motaghinejad, Manijeh Motevalian, Setare Farokhi larijani, Zohreh Khajehamedi
Adv Biomed Res
2015, 4:134 (27 July 2015)
DOI
:10.4103/2277-9175.161528
PMID
:26322282
Background:
Methylphenidate (MPH), a neural stimulant, can cause damages to brain; the chronic neurochemical and behavioral effects of MPH remain unclear. Exercise lowers stress and anxiety and can act as non-pharmacologic neuroprotective agent. In this study protective effects of exercise in MPH-induced anxiety, depression and cognition impairment were investigated.
Materials and Methods:
Seventy adult male rats were divided randomly into five groups. Group 1 served as negative control, received normal saline (0.2 ml/rat) for 21 days, group 2 and 3 (as positive controls) received MPH (10 and 20 mg/kg) for 21 days. Groups 4 and 5 concurrently were treated with MPH (10 and 20 mg/kg) and forced exercise for 21 days. On day 21, Elevated Plus Maze (EPM), Open Field Test (OFT), Forced Swim Test (FST) and Tail Suspension Test (TST) were used to investigate the level of anxiety and depression in animals. In addition between 17
th
and 21
th
days, Morris Water Maze (MWM) was applied to evaluate the effect of MPH on spatial learning and memory.
Results:
MPH-treated animals indicated a reflective depression and anxiety in a dose-dependent manner in FST, EPM and TST which were significantly different from the control group and also can significantly attenuate the motor activity and anxiety in OFT. Forced exercise by treadmill can attenuate MPH-induced anxiety, depression and motor activity alteration in OFT. MPH also can disturb learning and memory in MWM and forced exercise can neutralize this effect of MPH.
Conclusion
: We conclude that forced exercise can be protective in brain against MPH-induced anxiety, depression and cognition alteration.
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Original Article:
The predicting ability of serum potassium to assess the duration of mechanical ventilation in critically ill patients
Zahra Javdan, Reihanak Talakoub, Azim Honarmand, Mohammad Golparvar, Enayatolah Yadollahi Farsani
Adv Biomed Res
2015, 4:133 (27 July 2015)
DOI
:10.4103/2277-9175.161525
PMID
:26322281
Background:
No previous study has been done to evaluate the admission serum potassium level as a predictor of morbidity or need for mechanical ventilation. The aim of this study is to determine the predictive ability of serum potassium on admission, in critically ill trauma patients, and to evaluate the relation of the potassium level to organ failure, length of stay, ventilator need, and duration of mechanical ventilation.
Materials and Methods:
A prospective, observational study was done on 100 patients >16 years old, admitted to the Medical-Surgical Intensive Care Units (ICU), for over one year. Patients were classified into Group A: Patients who required equal or less than five days of mechanical ventilation and Group B: Patients who required more than five days of mechanical ventilation. The total serum potassium concentrations were measured and the Sequential Organ Failure Assessment (SOFA) score was recorded at the time of admission to the ICU, when connected to the ventilator, and then at the time of weaning from the ventilator.
Results:
There was no significant difference between the Serum K concentrations between the two groups, on admission. However, there were significant difference between the Serum K concentrations at times of receiving and weaning from mechanical ventilation (MV) between the two groups. We found the best cut-off point of 3.45 for serum potassium concentration, to predict the need for longer duration of MV.
Conclusion:
Development of hypokalemia during an ICU stay is associated with the need for mechanical ventilation. Monitoring of the serum potassium levels may be a good prognostic factor for the requirement of mechanical ventilation.
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Original Article:
Preemptive peritonsillar infiltration with bupivacaine in combination with tramadol improves pediatric post-tonsillectomy pain better than using bupivacaine or tramadol alone: A randomized, placebo-controlled, double blind clinical trial
Azim Honarmand, Mohammadreza Safavi, Khosrou Naghibi, Mohammadali Attari, Mojtaba Soltani, Mahsa Amoushahi, Fatemeh Sadeghipanah
Adv Biomed Res
2015, 4:132 (27 July 2015)
DOI
:10.4103/2277-9175.161518
PMID
:26322280
Background:
Post-tonsillectomy pain is one of the most common problems after anesthesia, therefore use of a good anesthesia technique with minimum side effect is an important aim. This study was performed to compare the efficacy of peritonsillar infiltration of bupivacaine, tramadol and combination of bupivacaine-tramadol in post-tonsillectomy pain.
Materials and Methods:
In a double blind trial 120 ASA I and II children condidated for tonsillectomy were randomized into four groups: Peritonsillar infiltration with bupivacaine 1 mg/kg in Group B, tramadol 2 mg/kg in Group T, combination of bupivacaine-tramadol in Group BT and saline in Group C was done.
Results:
Until 60 minutes in the recovery room, control of pain in the first three groups were better than Group C (
P
< 0.05) and in the third group it was better than others. Four hours after surgery, control of pain was better in the second and third groups in comparison to Groups B and Group C (
P
<0.05) and was better in the third group in comparison to the second group. Then, 24 hours after that, only in the group III the control of pain was effective (
P
< 0.05).
Conclusions:
In this study we showed that peritonsillar infiltration with combination of bupivacain-tramadol provided less post surgery pain compared with infiltration of bupivacaine and tramadol alone in adenotonsillectomy of children.
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Original Article:
Neuroprotective effects of
Rosa damascena
extract on learning and memory in a rat model of amyloid-β-induced Alzheimer`s disease
Ebrahim Esfandiary, Mohammad Karimipour, Mohammad Mardani, Mustafa Ghanadian, Hojjat Allah Alaei, Daryoush Mohammadnejad, Abolghasem Esmaeili
Adv Biomed Res
2015, 4:131 (27 July 2015)
DOI
:10.4103/2277-9175.161512
PMID
:26322279
Background:
Alzheimer's disease (AD) is an age-related progressive neurodegenerative disease, which is characterized clinically by serious impairment in memory and cognition. Current medications only slow down the dementia progression and the present treatment one-drug one-target paradigm for anti-AD treatment appears to be clinically unsuccessful. Therefore, alternative therapeutic strategies are urgently needed. With respect to multifunctional and multitargeted characteristics of
Rosa damascena
via its effective flavonoids, we investigated the effects of
R. damascena
extract on behavioral functions in a rat model of amyloid-β (A-β)-induced Alzheimer's disease.
Materials and Methods:
After preparation of the methanolic extract of the
R. damascena
, HPLC analysis and toxicity studies, median lethal dose (LD50) and dose levels were determined. For evaluation of baseline training behavioral performance, Morris water maze and passive avoidance tests were used. A-β was injected bilaterally into CA1 area of the hippocampus. Twenty-one days after injection of A-β, the first probe trial of the behavioral tests were used to confirm learning and memory impairment. To examine the potential effects of the extract on behavioral tasks, the second probe trials were performed after one month administration of
R. damasena
extract.
Results:
Results showed that the
R. damascena
extract significantly improved the spatial and long-term memories in the extract- treated groups in a dose-dependent manner, as in the middle and high doses it had significant effect.
Conclusion:
According to these results, we concluded that
R. damascena
can reverse behavioral deficits caused by A-β, and may provide a new potential option for prevention and treatment of the cognitive dysfunction in Alzheimer's disease.
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Original Article:
The effect of an specific inducible NO synthase inhibitor, S-methylisothiourea hemisulfate on cisplatin-induced nephrotoxicity; gender-related differences
Mansooreh Ghayyoomi, Nepton Soltani, Mehdi Nematbakhsh, Fatemeh Moslemi, Ardeshir Talebi, Soheila Shirdavani, Farzaneh Razmjoo
Adv Biomed Res
2015, 4:130 (20 July 2015)
DOI
:10.4103/2277-9175.161223
PMID
:26322278
Backgrounds:
It has been previously demonstrated that the increase of nitric oxide (NO) level may promote cisplatin (CP)-induced nephrotoxicity. The aim of this study was to investigate the role of inducible NO synthase (iNOS) inhibitor to prevent CP-induced nephrotoxicity.
Materials and Methods:
Four groups of male and four groups of female rats were treated daily with vehicle, S-methylisothiourea hemisulfate (SMT) as a selective iNOS inhibitor (5 mg/kg/twice a day), CP (2.5 mg/kg/day), and CP + SMT for 6 days. Then, all animals were sacrificed and the serum levels of creatinine (Cr), blood urea nitrogen (BUN), nitrite, and malondialdehyde (MDA) were measured. The kidney was removed immediately for histopathological study.
Results:
Our results showed that inhibition of iNOS by SMT could make different response in male and female animals. SMT therapy in male animals decreased serum BUN, Cr, nitrite, and MDA levels; and it also protected kidney against CP-induced nephrotoxicity.
Conclusion:
It is concluded that decrease in NO production by SMT has a beneficial effect on reducing CP-induced nephrotoxicity in male. However, such beneficial effect was not observed in female animals.
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4
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5
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[
3
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[
7
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May
[
3
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April
[
4
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[
3
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[
6
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1
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8
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[
7
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[
2
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9
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7
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[
9
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May
[
12
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[
15
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March
[
13
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February
[
14
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January
[
19
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2017
December
[
8
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November
[
16
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9
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8
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13
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17
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10
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9
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April
[
9
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16
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[
7
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6
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10
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18
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10
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9
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19
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14
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[
16
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[
14
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[
10
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27
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14
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13
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2
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14
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24
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27
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8
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26
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35
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18
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16
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21
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12
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17
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