Search published articles


Showing 4 results for Bayrami
Schizotypy and handedness in nonclinical individuals: A study of an Iranian sample population
Mansour Bayrami, Abbas Bakhshipour, Fatemeh Hadavandkhani,
Volume 13, Issue 3 (9-2010)
Abstract
Background: Studies have revealed that nonclinical individuals who have mixed-handedness obtain higher scores in schizotypy, but investigations in Asian countries have indicated contradictory results. The aim of this study was to identify the relationship between mixed-handedness and schizotypy in a nonclinical Iranian population. Materials and Methods:One hundred fifty normal students from two different high schools, 94 girls (%62.7) and 56 boys (%37.3) ranging in age from 14 to 17 (15.5±0.67), participated in this descriptive study. Participants filled out Schizotypal Trait Questionnaire (STA) and answered handedness questions. The causal relationship between schizotypy and handedness was determined through linear regression. Results: In this study, parallel to other studies conducted in Asia, no significant associations were found between mixed-handedness, schizotypy and schizotypy factors. Conclusion: Noticing that Asian people, due to cultural pressure, have less tolerant attitudes toward left-handedness, utilizing handedness scales that incorporate cultural values is essential for revealing the real association between schizotypy and mixed-handedness.
Study on the Toxicity Effects of Zinc Oxide Nanoparticles on Hematological and Serum Parameters in Mice
Parvin Sheydaei, Abolfazl Bayrami, Yashar Azizian, Shadi Parvinroo,
Volume 19, Issue 10 (1-2017)
Abstract

Abstract

Background: Nanoparticles are used in various applications due to unique mechanical and physicochemical properties such as their increased surface area to volume ratio and quantum effects. This study was designed to investigate the cytotoxic effects of zinc oxide nanopaticles on hematological and biochemical parameters BALB/c mice.

Materials and Methods: In this experimental study, 28 adult male mice BALB/c, were divided into four groups (one control group and three experimental groups). The mice in the experimental groups orally received Zinc Oxide nanoparticles with doses of 50, 100 and 300 mg/kg for 14 days. The control group received distillated water only. On 15th day, some hematological and biochemical parameters were studied on the blood samples collected.

Results: Results showed that Zinc Oxide nanoparticles cause changes in blood cells. In high concentration, nanoparticles increased some of factors such as white blood cells, hemoglubin, MCV and neutrophil and besides decreased amount of RBCs, pLTs, hematocrit, lymphocytes, glucose and kratenin significantly (p<0.05).

Conclusion: The findings showed that zinc oxide nanoparticles cause harmful effects due to the considerable variations in hematological and serum parameters in mice  in a dose-dependent way.


Evaluation of the Effects of Different Concentrations All-trans Retinoic Acid on the Survival of Bone Marrow Mesenchymal Stem Cells
Maryam Salem, Abolfazl Bayrami, Tooba Mirzapour, Mohsen Sagha,
Volume 21, Issue 1 (4-2018)
Abstract
Abstract
Background: According to application of Retinoic acid in differentiation of the stem cells to different cells and its role in apoptotic of cancer cells, the selection of appropriate dose for differentiation of stem cells is important. Thus in this study the effects of Retinoic acid in different concentrations on viability stem cells to select the appropriate dose for differentiation was investigated.
Materials and Methods: In this study, bone marrow mesenchymal stem cells were affected by different concentrations of Retinoic acid. Survival of cells was investigated after 3, 10 and 15 days of culture by MTT assay. DAPI staining was used to evaluate the number of apoplectic nuclei in treated cells after 10 and 15 days.
Results: After three days of culture, the results showed that a large number of cells are destroyed at concentrations of 10-4, 10-3 and 10-2M of Retinoic acid, while in 10-5 and 10-6 M of Retinoic acid, it is not observed many apoptosis. Amount of 10-5M Retinoic acid after 10 days showed significant apoptosis, while the concentration of 10-6 M Retinoic acid after 15 days showed significant apoptosis compared to the control group (p<0.05).
Conclusion: It looks that 10-6 M Retinoic acid is an appropriate concentration for differentiation of mesenchymal stem cells.
 

The Effects of L-dopa, SCH23390 Hydrochloride and Sulpiride on Adiponectin and Luteinizing Hormone Levels in an Animal Model of Polycystic Ovary Syndrome
Khadijeh Haghighat Gollo, Fariba Mahmoudi, Abolfazl Bayrami, Saber Zahri,
Volume 23, Issue 2 (June & July 2020)
Abstract
Background and Aim: In patients suffer from Polycystic Ovary Syndrome (PCOS), the secretion of the Luteinizing Hormone (LH) increases while adiponectin secretion and dopamine release decreases. Dopamine and adiponectin exert inhibitory effecs on LH secretion. In the present study the effects of L-dopa and dopamine receptor antagonists were investigated on LH secretion and adiponectin gene expression of in PCOS model rats to determine whether dopaminergic pathway might be involved in the decreasing LH via affecting adiponectin.
Methods & Materials: Following estradiol valerate- induced PCOS, fifteen PCOS rats were divided into 3 groups including saline receiving group, L-dopa(100 mg/kg) or simultaneous injections of sulpride(10 mg/kg), SCH23390 hydrochloride (1 mg/kg) and L-dopa(100 mg/kg), Five intact rats received saline as negative control group. Blood samples were collected via tail vein. Ovary and hypothalamus were dissected and frozen. Serum concentration of LH and relative gene expression of adiponectin in ovary and hypothalamus were determined by radioimmunoassay and real time-PCR method. 
Ethical Considerations: This study was approved by the Research Committee of University of Mohaghegh Ardabili (Code: 95.125.1). 
Results: Induction of PCOS caused a significant increase in mean serum concentration of LH and a significant decrease in mean relative gene expression of ovarian and hypothalamic adiponectin compared to control group. L-dopa caused a significant decrease in serum concentration of LH, a significant decrease in hypothalamic gene expression of adiponectin compared to PCOS rats. But it did not significantly increase ovarian adiponectin gene expression in comparison to PCOS rats. Dopamine receptor antagonists inhibit the effects of L-dopa on LH and hypothalamic gene expression of adiponectin.
Conclusion: Dopaminergic signaling pathway may be involved in decreasing LH secretion via increasing hypothalamic adiponectin gene expression level in PCOS rats.

Page 1 from 1     

© 2025 CC BY-NC 4.0 | Journal of Arak University of Medical Sciences

Designed & Developed by : Yektaweb