Amir Heidari; Tahmineh Peirouvi; Azam Akbari; Rahim Mahmoudloo
Volume 22, Issue 3 , May and June 2015, , Pages 232-237
Abstract
Background and purpose: In human cytochrome P450 (CYP), enzymes are responsible for the oxidative metabolism of many medicines. The greatest metabolism proportions are carried out by enzymes that are found in the liver. CYPs are located in the microsomes. For these reasons preparation of microsomes and ...
Read More
Background and purpose: In human cytochrome P450 (CYP), enzymes are responsible for the oxidative metabolism of many medicines. The greatest metabolism proportions are carried out by enzymes that are found in the liver. CYPs are located in the microsomes. For these reasons preparation of microsomes and measurement of their protein are very important to determine the potency of liver for metabolic elimination of drugs in humans. The aim of this project was to extract microsmes and determine levels of microsomal protein in human tissue.
Methods: Eighteen biopsies of human liver were obtained with their consents from patients undergoing surgery. Liver samples were finely chopped and homogenized in the buffer. Liver homogenate was centrifuged in different steps to yield a microsomal pellet. Then content of total protein was determined according to Lowry method. Data were analyzed according to descriptive statistics method.
Results: The value of MPPGL (microsomal protein per gram of liver) ranged from14.1 to 27.2 mg per gram of liver (mean 20.24±3.77).
Conclusion: The values of MPPGL in this project were reported for the first time in Iran. The mean value of MPPGL in this project is lower than others studies. These results in this area, will aid the physicians to improve the level of safety of prescription of the medicines. Many doctors are unaware of the possible risks for patients whom have exposed by being treated with drugs.
Tahmineh Peirouvi; Amir Haidary; Mostafa Solati; Daryosh Mohammadnejad; Akbar Gharbali; Gholmhossein Farjah
Volume 19, Issue 1 , March and April 2012, , Pages 52-58
Abstract
Background: The epididymis is a tubule that processes the maturation, storage, and transfer of sperm. Growth and maintenance of epididymal structures depend on testosterone release, which is directly controlled by pituitary gonadotropins. Furthermore, gonadotropins are controlled by hypothalamic releasing ...
Read More
Background: The epididymis is a tubule that processes the maturation, storage, and transfer of sperm. Growth and maintenance of epididymal structures depend on testosterone release, which is directly controlled by pituitary gonadotropins. Furthermore, gonadotropins are controlled by hypothalamic releasing hormones. Using gonadotropin releasing hormone (GnRH) analogs can stop the pituitary-gonadal axis. This study aimed at determining the effect of a GnRH agonist (buserelin) on prepubertal rat epididymal tissue.
Materials and Methods: In this experimental, 20 rats on the 25th day after birth, provided by the Department animal house, were divided into 4 groups. The first and second study groups received 0.1 mg/kg GnRH agonist for 5 days and were dissected on the 30th and 35th day after birth, respectively. Animals in the control group received physiologic serum 0.1 mg/ml for 5 days and were dissected like the study groups. Measurements were performed using a calibrated microscope.
Results: The findings reveal a significant increase in epithelial height and lumen diameter in the first and second study groups as compared with the first control group (p ≤ 0.05). In comparison between the second study group and the second control group, only epithelial height, but not lumen diameter, showed a significant increase. Also, there was no significant difference in muscular thickness between the study and control groups.
Conclusion: This study shows that short-term administration of GnRH increases epithelium growth and lumen diameter, but not muscle thickness, in epididymis.