Abstract:
:Leydig cells are the primary source of androgens in the mammalian testis. It is established that the luteinizing hormone (LH) produced by the anterior pituitary is required to maintain the structure and function of the Leydig cells in the postnatal testis. Until recent years, a role by the thyroid hormones on Leydig cells was not documented. It is evident now that thyroid hormones perform many functions in Leydig cells. For the process of postnatal Leydig cell differentiation, thyroid hormones are crucial. Thyroid hormones acutely stimulate Leydig cell steroidogenesis. Thyroid hormones cause proliferation of the cytoplasmic organelle peroxisome and stimulate the production of steroidogenic acute regulatory protein (StAR) and StAR mRNA in Leydig cells; both peroxisomes and StAR are linked with the transport of cholesterol, the obligatory intermediate in steroid hormone biosynthesis, into mitochondria. The presence of thyroid hormone receptors in Leydig cells and other cell types of the Leydig lineage is an issue that needs to be fully addressed in future studies. As thyroid hormones regulate many functions of Sertoli cells and the Sertoli cells regulate certain functions of Leydig cells, effects of thyroid hormones on Leydig cells mediated via the Sertoli cells are also reviewed in this paper. Additionally, out of all cell types in the testis, the thyrotropin releasing hormone (TRH), TRH mRNA and TRH receptor are present exclusively in Leydig cells. However, whether Leydig cells have a regulatory role on the hypothalamo-pituitary-thyroid axis is currently unknown.
journal_name
Indian J Exp Bioljournal_title
Indian journal of experimental biologyauthors
Mendis-Handagama SM,Siril Ariyaratne HBkeywords:
subject
Has Abstractpub_date
2005-11-01 00:00:00pages
939-62issue
11eissn
0019-5189issn
0975-1009journal_volume
43pub_type
杂志文章,评审abstract::Four heterocystous cyanobacteria, isolated from grasslands of Ujjain were selected to prepare the clay based inoculants. Inoculants were evaluated for shelf life in terms of the titer value at 6 month intervals for 24 months. For colonization by inoculants in natural grasslands, the clay based inocula were applied to ...
journal_title:Indian journal of experimental biology
pub_type: 杂志文章
doi:
更新日期:2009-03-01 00:00:00
abstract::Octapeptide (OP)/FSH-Receptor Binding Inhibitor-8 (FRBI-8), is a synthetic peptide corresponding to N-terminal sequence of purified fraction of Follicle Stimulating Hormone Binding-Inhibitor (FSHBI), isolated earlier from human ovarian follicular-fluid. In order to avoid the repeated drug-administration, OP-loaded, po...
journal_title:Indian journal of experimental biology
pub_type: 杂志文章
doi:
更新日期:2013-12-01 00:00:00
abstract::Cyclooxygenase (COX) isoenzyme is known to play an important role in the pathophysiology of Parkinson's disease. The present study evaluated the neuroprotective effect of nimesulide, a preferential COX-2-inhibitor against 1-methyl-4-phenyl-1,2,3,6-tertahydropyridine (MPTP)-model of Parkinson's disease. Intrastriatal a...
journal_title:Indian journal of experimental biology
pub_type: 杂志文章
doi:
更新日期:2010-06-01 00:00:00
abstract::Effect of polyherbal formulation Ambrex was evaluated in butylated hydroxytoluene (BHT) induced toxicity of lungs and liver in rats. Toxicity was produced by administering BHT (500 mg/kg/day) for 3 days. Lung damage was evidenced by elevated levels of broncho alveolar lavage fluid (BAL) parameters such as protein, lac...
journal_title:Indian journal of experimental biology
pub_type: 杂志文章
doi:
更新日期:2003-11-01 00:00:00
abstract::A new gamma-aminobutyric acid derivative, N-phthaloyl GABA (P-GABA), was synthesised and its anticonvulsant activity was tested and compared with sodium valproate for efficacy against experimentally induced convulsions in mice. At a dose of 80 mg/kg, P-GABA rendered more protection than sodium valproate. ED50 of P-GAB...
journal_title:Indian journal of experimental biology
pub_type: 杂志文章
doi:
更新日期:1989-09-01 00:00:00
abstract::Dementia is one of the age related mental problems and a characteristic symptom of various neurodegenerative disorders including Alzheimer's disease. Certain drugs like diazepam, barbiturates and alcohol disrupt learning and memory in animals and man. However, a new class of drugs known as nootropic agents is now used...
journal_title:Indian journal of experimental biology
pub_type: 杂志文章
doi:
更新日期:2006-02-01 00:00:00
abstract::Significant reduction (68.38%) in sheath blight disease of rice was noticed when foliar spray of a systemic fungicide, kitazin (480 micrograms mg-1), was applied twice at an interval of 2 days before inoculation. SDS-PAGE analysis of proteins of Rhizoctonia-infected rice leaf sheaths revealed the presence of 16 protei...
journal_title:Indian journal of experimental biology
pub_type: 杂志文章
doi:
更新日期:1997-06-01 00:00:00
abstract::A strain of T. chilonis, an egg parasitoid of lepidopteran pests tolerant to the most commonly used cyclodiene insecticide--endosulfan was developed in the laboratory. Tolerance to endosulfan was induced by exposing adult parasitoids sequentially from a sub-lethal concentration (0.004%) to the field recommended concen...
journal_title:Indian journal of experimental biology
pub_type: 杂志文章
doi:
更新日期:2006-07-01 00:00:00
abstract::Enzyme levels of serum glutamate oxaloacetate transaminase (SGOT), serum glutamate pyruvate transaminase (SGPT) and alkaline phosphatase (ALP) increased following paracetamol induction were significantly lowered due to pretreatment with the beta-carotene (BC). This supplementation reversed the trend inducing a signifi...
journal_title:Indian journal of experimental biology
pub_type: 杂志文章
doi:
更新日期:2005-04-01 00:00:00
abstract::Chronic (2 h/d x 8 weeks) exposure to magnetic field (MF; 50 Hz, 17.9 microT) in complete spinal cord (T13) transected rats restored food intake (FI), water intake (WI) and body weight (BW) which were decreased in the spinal cord injured rats. The results suggest a significant beneficial effect of chronic exposure to ...
journal_title:Indian journal of experimental biology
pub_type: 杂志文章
doi:
更新日期:2010-10-01 00:00:00
abstract::Parkinson's disease (PD) is a neurodegenerative disease characterized by the selective loss of dopamine (DA) neurons of the substantia nigra pars compacta (SNc). The events, which trigger and/or mediate the loss of nigral DA neurons, however, remain unclear. Neuroleptic-induced catalepsy has long been used as an anima...
journal_title:Indian journal of experimental biology
pub_type: 杂志文章
doi:
更新日期:2006-01-01 00:00:00
abstract::Oral pretreatment of rats with G. cambogia fruit extract (1 g/kg body weight/day at interval of 7 and 15 days) protected gastric mucosa against HCl-ethanol induced damage by decreasing the volume and acidity of gastric juice. Increased lipid peroxidation, decreased activity of antioxidant enzymes, altered levels of pr...
journal_title:Indian journal of experimental biology
pub_type: 杂志文章
doi:
更新日期:2002-01-01 00:00:00
abstract::Effects of ampicillin (Amp) in combination with riboflavin on septic arthritis in mice infected with Staphylococcus aureus have been reported. Ampicillin was given at 100 mg/kg after 24 h of infection, followed by riboflavin (Ribo) at 20 mg/kg body wt, after 2 h of Amp treatment. Mice were sacrificed at 3, 9, 15 days ...
journal_title:Indian journal of experimental biology
pub_type: 杂志文章
doi:
更新日期:2012-10-01 00:00:00
abstract::A new design of insecticide testing assembly has been devised that is highly versatile in testing the efficacy, potency and interaction of insecticides and other test chemicals. The merits of the assembly and technique have been explained. ...
journal_title:Indian journal of experimental biology
pub_type: 杂志文章
doi:
更新日期:2002-05-01 00:00:00
abstract::A study to monitor marine pollution with reference to trace elements (Fe, Zn, Mn and Cu) on T. attenuata, commonly called as screw shell over a period of one year on the whole body and various organs, viz. digestive diverticula, foot, mantle and ovary was conducted from the sandy beach of Porto Novo Coast (Lat 11 degr...
journal_title:Indian journal of experimental biology
pub_type: 杂志文章
doi:
更新日期:1999-11-01 00:00:00
abstract::Mechanism of radioprotective action of caffeine by studying the gamma radiation -induced killing of yeast, S. cerevisae is reported. The results reveal that caffeine specifically protects aerobically (oxic) grown cells from gamma - radiation and sensitizes anaerobically (hypoxic) grown cells to some extent. Using radi...
journal_title:Indian journal of experimental biology
pub_type: 杂志文章
doi:
更新日期:2001-12-01 00:00:00
abstract::Bryan Standard strain of Rous Sarcoma Virus (BS-RSV) of subgroup A and pseudotype of Bryan high titre RSV(RAV-49) of subgroup C and an equal mixture of subgroup A and subgroup C virus were inoculated to 11-day old embryos of white leghorn (WL), Australorp (AL) and f1 and f2 generations of crosses between WL and AL bre...
journal_title:Indian journal of experimental biology
pub_type: 杂志文章
doi:
更新日期:1997-01-01 00:00:00
abstract::Therapeutic efficacy of EGTA (ethylene glycol bis (2-aminoethyl ether) tetraacetic acid) against cerium intoxicated mice was studied. Administration of cerium showed significant decrease in haemoglobin percentage, RBC counts and blood glucose level with an increase in the activity of serum transaminases and WBC counts...
journal_title:Indian journal of experimental biology
pub_type: 杂志文章
doi:
更新日期:2004-09-01 00:00:00
abstract::The use of plants is as old as the mankind. Natural products are cheap and claimed to be safe. They are also suitable raw material for production of new synthetic agents. Rosemary (Rosmarinus officinalis Linn.) is a common household plant grown in many parts of the world. It is used for flavouring food, a beverage dri...
journal_title:Indian journal of experimental biology
pub_type: 杂志文章,评审
doi:
更新日期:1999-02-01 00:00:00
abstract::The effects of A. indica (AI, Neem) were evaluated on tests of humoral and cell-mediated immune responses after 3 weeks of oral AI (leaf extract) treatment in ovalbumin immunized mice. At the dose levels tested, AI (10, 30 or 100 mg/kg), had no appreciable influence on different organ (liver, spleen, thymus)/body weig...
journal_title:Indian journal of experimental biology
pub_type: 杂志文章
doi:
更新日期:1996-07-01 00:00:00
abstract::Enzymed-linked immunosorbent assay of hilsa and pomfret muscle extracts showed specific IgE binding to ten allergic patients' sera, the results corroborated to that of skin prick test. Comparison of allergen profiles of the two fish extracts by immunoblotting revealed a common antigenic protein of 50 kDa and some high...
journal_title:Indian journal of experimental biology
pub_type: 杂志文章
doi:
更新日期:2005-12-01 00:00:00
abstract::Methanolic extract of P. amarus was found to have potential anti-oxidant activity as it could inhibit lipid peroxidation, and scavenge hydroxyl and superoxide radicals in vitro. The amount required for 50% inhibition of lipid peroxide formation was 104 microg/ml and the concentrations needed to scavenge hydroxyl and s...
journal_title:Indian journal of experimental biology
pub_type: 杂志文章
doi:
更新日期:2002-08-01 00:00:00
abstract::FtsZ plays an important role in bacterial cell division by polymerizing to form the Z ring at the site of cytokinesis. Phytochemicals are known to disrupt bacterial cell division through inhibition of FtsZ assembly. In the present study phytochemicals like eugenol, trans-cinnamic acid, 4-formyl cinnamic acid, naringen...
journal_title:Indian journal of experimental biology
pub_type: 杂志文章
doi:
更新日期:2008-11-01 00:00:00
abstract::Five sheep were intoxicated with powdered L. camara, leaves at the rate of 200 mg/kg body weight daily for 110 days and another group of four sheep were drenched with distilled water daily for equal number of days which acted as control. The cell mediated immunity of intoxicated and control sheep was assessed with the...
journal_title:Indian journal of experimental biology
pub_type: 杂志文章
doi:
更新日期:1991-08-01 00:00:00
abstract::The present study was undertaken to determine the anti-ulcer and antioxidant potential of GutGard, a standardized extract of Glycyrrhiza glabra commonly known as licorice. Effect of various doses (12.5, 25, and 50 mg/kg, po) of GutGard was studied on gastric ulcers in pylorus ligation-, cold-restraint stress- and indo...
journal_title:Indian journal of experimental biology
pub_type: 杂志文章
doi:
更新日期:2010-03-01 00:00:00
abstract::Seven L. acidophilus strains were examined for their antibiotic sensitivity against various chemotherapeutic agents and all of them were found to be sensitive to novobicin, chloramphenicol, ampicillin, erythromycin, oxytetracycline and chlorotetracycline, whereas, all were resistant to norfloxacin and nalidixic acid. ...
journal_title:Indian journal of experimental biology
pub_type: 杂志文章
doi:
更新日期:1995-08-01 00:00:00
abstract::Role of fatty acid binding proteins (FABPs) in modulating inhibition of human placental malate dehydrogenase by palmitoyl-CoA and oleate has been studied. Activity of human placental cytosolic malate dehydrogenase is detected throughout the gestation, showing a peak at midgestation (20-25 weeks). Inhibition (50%) of t...
journal_title:Indian journal of experimental biology
pub_type: 杂志文章
doi:
更新日期:1994-11-01 00:00:00
abstract::Aerobic and microaerobic diazotrophs possess numerous oxygen restriction strategies to protect nitrogenase from inactivation by oxygen without interfering with energy generation through oxidative phosphorylation. Protection by conformational change in nitrogenase was first detected and described in Azotobacter. This s...
journal_title:Indian journal of experimental biology
pub_type: 杂志文章
doi:
更新日期:2002-02-01 00:00:00
abstract::The effect of the oral administration of megestrol acetate (MA; 17 alpha-acetoxy-6-dehydro-6-methylprogesterone) for 30 days at a dose of 40 mg/kg body weight/day on the genital organs and fertility of male rats was studied. MA had no effect on spermatogenesis or the fertility of the animals. However, the weights of...
journal_title:Indian journal of experimental biology
pub_type: 杂志文章
doi:
更新日期:1965-10-01 00:00:00
abstract::Lactobacillus acidophilus strains tested showed inhibitory activity towards Salmonella typhi, Staphylococcus aureus, Escherichia coli, Proteus vulgaris and Yersinia enterocolitica. However, wide variations in the activity of the strains were observed. Antagonistic activity of the strains exhibited high heat stability ...
journal_title:Indian journal of experimental biology
pub_type: 杂志文章
doi:
更新日期:1996-12-01 00:00:00