GABAa receptor alpha4 subunit suppression prevents withdrawal properties of an endogenous steroid

Article Abstract:

The progesterone hormone is converted to 3alpha-OH-5alpha-pregnan-20-one (3alpha,5alpha-THP) in the brain. It acts like a sedative by enhancing GABA function. The symptoms of premenstrual syndrome (PMS) are linked to sharp falls in the circulating levels of progesterone and levels of 3alpha,5alpha-THP. A progesterone-withdrawal paradigm, mimicking PMS in a rat model is reported. It was found that PMS symptoms could be partly attributable to change sin GABAA expression.

Author: Smith, Sheryl S., Gong, Qi Hua, Hsu, Fu-Chun, Markowitz, Ronald s., Ffrench-Mullen, J.M.H., Li, Xinshe
Research, Progesterone, Premenstrual syndrome

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Combating cholesterol

Article Abstract:

New drugs such as squalestatin and zaragozic acids are developed to treat atherosclerosis, a chronic disease associated with the vascular system. The disease is a fatal one and is caused by high level of cholesterol in the blood serum. The new drugs inhibit the production of cholesterol within a cell, reducing the overall level of cholesterol in the blood. The two new drugs are obtained from the cultures of Sporormiella intermedia and Phoma species.

Author: Kelly, Mike J., Roberts, Stanley M.
Care and treatment, Atherosclerosis

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