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Gossypol--a new antifertility agent for males. 1979

Gossypol is capable of inhibiting the fertility of male rats. On administration of gossypol the spermatids are damaged first. With the increase in dosage and duration of treatment the spermatocytes are also damaged. In the epidymis there are exfoliated spermatids and spermatocytes with numerous dead spermatozoa many of which had their heads and fails separated. The sperm count gradually decreases until azoospermia. Electron microscopic examinations reveal changes in the acrosomes and mitochondrial spiral sheath. Interstitial cells of the testis seemed to be unaffected. Over 4,000 healthy men have been on gossypol for more than 6 months. The antifertility efficacy evaluated by semen examination is 99.89%. Side effects are mild and of low incidence. A few of the subjects are found to be hypokalemic. However, it remains to be elucidated if gossypol is related to the development of hypokalemia.

UI MeSH Term Description Entries
D007700 Kinetics The rate dynamics in chemical or physical systems.
D008297 Male Males
D002986 Clinical Trials as Topic Works about pre-planned studies of the safety, efficacy, or optimum dosage schedule (if appropriate) of one or more diagnostic, therapeutic, or prophylactic drugs, devices, or techniques selected according to predetermined criteria of eligibility and observed for predefined evidence of favorable and unfavorable effects. This concept includes clinical trials conducted both in the U.S. and in other countries. Clinical Trial as Topic
D003272 Contraceptive Agents, Male Chemical substances or agents with contraceptive activity in males. Use for male contraceptive agents in general or for which there is no specific heading. Male Contraceptive,Contraceptives, Male,Agents, Male Contraceptive,Contraceptive, Male,Male Contraceptive Agents,Male Contraceptives
D004353 Drug Evaluation, Preclinical Preclinical testing of drugs in experimental animals or in vitro for their biological and toxic effects and potential clinical applications. Drug Screening,Evaluation Studies, Drug, Pre-Clinical,Drug Evaluation Studies, Preclinical,Drug Evaluations, Preclinical,Evaluation Studies, Drug, Preclinical,Evaluation, Preclinical Drug,Evaluations, Preclinical Drug,Medicinal Plants Testing, Preclinical,Preclinical Drug Evaluation,Preclinical Drug Evaluations,Drug Screenings,Screening, Drug,Screenings, Drug
D004822 Epididymis The convoluted cordlike structure attached to the posterior of the TESTIS. Epididymis consists of the head (caput), the body (corpus), and the tail (cauda). A network of ducts leaving the testis joins into a common epididymal tubule proper which provides the transport, storage, and maturation of SPERMATOZOA.
D006072 Gossypol A dimeric sesquiterpene found in cottonseed (GOSSYPIUM). The (-) isomer is active as a male contraceptive (CONTRACEPTIVE AGENTS, MALE) whereas toxic symptoms are associated with the (+) isomer. Gossypol Dipotassium Salt,Gossypol Sodium Salt,Gossypol, (+)-Isomer,Gossypol, (+-)-Isomer,Gossypol, (-)-Isomer,Dipotassium Salt, Gossypol,Sodium Salt, Gossypol
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D012671 Seminiferous Tubules The convoluted tubules in the TESTIS where sperm are produced (SPERMATOGENESIS) and conveyed to the RETE TESTIS. Spermatogenic tubules are composed of developing germ cells and the supporting SERTOLI CELLS. Seminiferous Tubule,Tubule, Seminiferous,Tubules, Seminiferous

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