Effects of chronic systemic administration of opioid peptides, naloxone and N-acetyl beta-endorphin antiserum on gonadotropins and testicular functions in the rat

Laxmi, N.A.; Vijayan, E.

Indian Journal of Experimental Biology 36(4): 361-366

1998


ISSN/ISBN: 0019-5189
PMID: 9717445
Document Number: 490716
Systemic administration of opioid peptides, methionine-enkephalin and beta-endorphin, chronically, lowered gonadotropin levels in plasma and had an inhibitory effect mainly on the testicular enzymes hyaluronidase, acid phosphatase and on incorporation of 3(H) thymidine in the tissue. When rats were similarly treated with opioid peptide antagonist naloxone and N-acetyl beta-endorphin antiserum, induced an opposite effect. This is either the direct effect of opioid peptides/antagonist on the gonads or it may be via the circulating levels of gonadotropin.

Document emailed within 1 workday
Secure & encrypted payments