Effects of n-butyrate on nuclear thyroid hormone receptors and on thyroid hormoneresponsive nuclear protein were investigated by means of a perfusion system in rat liver. Treatment with 5 mM n-butyrate resulted in an increase (150%) in the maximal binding capacity of 3,5,3'-L-triiodothyronine (T3) nuclear receptors without altering the affinity of receptor for T3. However, further perfusion for...

A. " Genomic " and " nongenomic " mechanisms B. Steroid hormone actions on gene expression C. Subtypes of estrogen receptors D. Steroid hormone actions on putative receptors on membranes E. Rapid actions of steroids on neuronal excitability F. Steroid hormone actions via second messengers G. Neuroprotective effects of estrogens H. Summary III. Areas of the Brain Affected Outside of the Hypothal...

Despite the bewildering ability of higher plants to change their development with respect to the environment, there appear to be only a few hormones that function to organize growth and development. With the recent identification of three plant hormone receptors, the molecular identities of all the major plant receptors are now known. Some plant hormones such as cytokinins, ethylene, and brassi...

angiotensin-ii is a multifunctional hormone that regulates blood pressure, plasma volume, neuronal functions, electrolyte balance, thrust and various other vital mechanisms. it acts through its receptors at 1 and at 2 . the involvement of angiotensin-ii and its receptors in cognition is still ambiguous. therefore, the present study was designed to investigate the effect of angiotensin-ii (2 μg/...

The antennae of male Periplaneta americana acquire a large number of olfactory receptors at the adult stage. Electrophysiological methods (single unit and electroantennogram recording) show that a portion of the receptors added at the adult ecdysis are sex attractant receptors. Sex attractant receptors are not present in large numbers on larval and adult female antennae. The differentiation of ...

A method is described which makes use of 4M MgCl, to dissociate the testicular luteinizing hormone-receptor complex without altering either the binding capacity or binding affinity of the receptor. Using this method, it was demonstrated that in vitro incubation at 4" of decapsulated rat testes with various concentratznmuteinizing hormone or with human chorionic gonadotropin resulted in a reduct...

obesity is a chronic disease that shows the most serious global health problems .it relates to the body fat .obesity is caused by an imbalance between energy intake and expenditure, this balance is regulated by genetic and environmental interactions. obesity, which is a risk factor for chronic diseases, has become epidemic in the developed countries. resistance to leptin hormone is one of the m...

We have characterized the newly developed thyroid hormone antagonist NH-3 in both cell culture and in vivo model systems. NH-3 binds Xenopus laevis thyroid hormone receptors directly in vitro and induces a conformation distinct from agonist-bound receptors. Transcriptional activation of a thyroid hormone response element-containing reporter gene is strongly inhibited by NH-3 in a dose-dependent...

Pineal hormone melatonin is widely used in the treatment of disorders of circadian rhythms. The presence of melatonin receptors in various animal tissues motivates the use of this hormone in some other diseases. For this reason, in recent years investigators continued the search for synthetic analogues of melatonin which are metabolically stable and selective to receptors. This review includes ...

The PI3K/Akt/mTOR is a key signaling system that binds oncogenes and various receptors to many cell functions, promotes estrogen resistance, the most frequently activated pathway in malignant neoplasm, including breast cancer (BC). About 70 % of BC hormone‑receptor positive endocrine therapy main component treatment for patients. Tamoxifen remains one basic drugs adjuvant estrogen‑positive Howe...