Journal of Advanced Biotechnology and Experimental Therapeutics

04-09.

Authors: Shahidur Rahman and Md. Shahjahan

γ- aminobutyric acid (GABA) is an essential metabolite which plays a crucial role in signal transmission, stress metabolism, and some other activities also reported. Although the actual function of GABA shunt is not clearly understood. Three key enzymes, gamma aminobutyric acid transaminase (GABA-T), succinic semialdehyde dehydrogenase and succinic semialdehyde reductase are involved in GABA shunt mechanism en route from glutamate to the tricarboxylic acid cycle (TCA)which could pave the way of GABA shunt action. The enzyme gamma aminobutyric acid transaminase (GABA-T) could also play a key role in GABA shunt action by converting GABA to succinic semialdehyde (SSA).In this study, the protein sequence of γ-aminobutyric acid transaminase of Brassica napus (Rape) was retrieved from UniProt protein database and analyzed GABA-T enzyme using different bioinformatics tools and servers to analyze the physiochemical properties, amino acid composition, conformational states, and 3D structure. We found that our experimental protein sequence was very unstable, and the graph of Local Quality Estimate showed that the sequence was porn to mutation and value of Z score was above two in comparison with a non-redundant set of PDB structure. In addition, the phylogenetic tree revealed that GABA-T of Dendrobium officinale, Phoenix dactylifera, Oryza sativa, Arabidopsis thaliana and Brassica napus evolved from a common ancestor gene.

17-22.

Authors: Md Mahmodul Hasan Sohel

In a growing follicle, granulosa cells (GCs) are the major cellular component and perform several important functions. GCs are an excellent choice for in vitro experimentation to understand their functions in vivo. However, the isolation of a pure fraction of GCs from slaughterhouse ovaries remains a challenge. The current study describes a simpler yet reliable method for isolating GCs from slaughterhouse ovaries of domestic animals. For this, bovine ovaries were collected from a nearby slaughterhouse and GCs were collected by aspiration method, one fraction of fresh GCs was snap frozen and stored at -80°C for further analysis and another fraction was used in culture purpose. The purity of GCs was determined by quantifying follicle stimulating hormone receptor (FSHR) and CYP17A1 transcripts and analyzing the cultured cells under a microscope. The viability of GCs ranged from 66 – 35 % depending on the time and media used in transportation-processing. The results showed that FSHR gene was highly expressed as evidenced by the presence of a strong band while CYP17A1 is completely absent in the GCs isolated using the current method. In addition, the characteristics of the cultured cells further confirm the purity of isolated GCs. The current method isolates a pure population of GCs from slaughterhouse ovary without any contamination of thecal cells.

31-35.

Authors: Mohammad Rafiqul Islam, Md. Anwar Jahid, Md Zahirul Islam Khan and Md. Nabiul Islam

Lead toxicity is the vital issue in the developing countries that causes serious health hazards in animals and humans. Prophylactic effects of vitamin E and coriander (Coriandrum sativum) extract on lead-induced testicular damage in Swiss albino mice were investigated in the present study by gross and histological studies in five groups (control, lead intoxicated, vitamin E-treated, coriander-treated, vitamin E and coriander-treated). Treatment was done for 42 days. In the present study, weight and length of left and right testes were significantly (p<0.05) reduced in lead-intoxicated mice in comparison to the control group. Lead acetate was found to cause separation of primary spermatocyte from spermatogonia, morphological changes of seminiferous tubule and irregular arrangement of spermatogenic cells in the seminiferous tubules of testis. Vitamin E and coriander extract were found effective in the treatment of lead intoxicated mice and testes histology were found normal. Combined antioxidative action of vitamin E and corriander extract was also found effective in the treatment of lead intoxicated mice. The present investigation may serve as baseline data about adverse effects of lead toxicity and efficacy of vitamin E and coriander extract against lead toxicity. Further research need to be done to isolate and purify the active principle involved in the antioxidant activity of this plant.