In vivo inhibition of LH release by a synthetic antagonist of LH releasing hormone (LH RH)

J. A. Vilchez Martinez, Andrew V Schally, D. H. Coy

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The anti LH releasing hormone (LH RH) activity of des His2 desGly10 LH RH ethylamide (antagonist I), an analogue of LH RH, was studied in several animal systems. An i.v. infusion of antagonist I for 2 hr significantly inhibited LH release in response to the administration of LH RH in ovariectomized, estrogen and progesterone treated (OEP) rats and intact adult male rats. In OEP rats, a good dose response inhibition curve was found. Similarly, a quick injection of antagonist I was able to inhibit partially the LH release induced by LH RH in OEP rats. In addition, the high levels of serum LH in rats ovariectomized for 2 mth were lowered by the infusion of antagonist I. In cycling female rats, 2 injections of antagonist I blocked ovulation induced by exogenous LH RH in the second day of diestrous and chronic administration of antagonist I delayed spontaneous ovulation for at least 48 hr. The synthesis of this antagonist of LH RH capable of partially blocking LH release may be a first step toward the development of birth control methods based on synthetic peptides.

Original languageEnglish
Pages (from-to)213-218
Number of pages6
JournalEndocrinology
Volume95
Issue number1
StatePublished - Dec 1 1974
Externally publishedYes

Fingerprint

Gonadotropin-Releasing Hormone
Progesterone
Estrogens
Ovulation
Hormone Antagonists
Injections
Contraception
Peptides
Serum

ASJC Scopus subject areas

  • Endocrinology
  • Endocrinology, Diabetes and Metabolism

Cite this

In vivo inhibition of LH release by a synthetic antagonist of LH releasing hormone (LH RH). / Vilchez Martinez, J. A.; Schally, Andrew V; Coy, D. H.

In: Endocrinology, Vol. 95, No. 1, 01.12.1974, p. 213-218.

Research output: Contribution to journalArticle

Vilchez Martinez, J. A. ; Schally, Andrew V ; Coy, D. H. / In vivo inhibition of LH release by a synthetic antagonist of LH releasing hormone (LH RH). In: Endocrinology. 1974 ; Vol. 95, No. 1. pp. 213-218.
@article{16b33818f3d4428da25305dc0938c7b8,
title = "In vivo inhibition of LH release by a synthetic antagonist of LH releasing hormone (LH RH)",
abstract = "The anti LH releasing hormone (LH RH) activity of des His2 desGly10 LH RH ethylamide (antagonist I), an analogue of LH RH, was studied in several animal systems. An i.v. infusion of antagonist I for 2 hr significantly inhibited LH release in response to the administration of LH RH in ovariectomized, estrogen and progesterone treated (OEP) rats and intact adult male rats. In OEP rats, a good dose response inhibition curve was found. Similarly, a quick injection of antagonist I was able to inhibit partially the LH release induced by LH RH in OEP rats. In addition, the high levels of serum LH in rats ovariectomized for 2 mth were lowered by the infusion of antagonist I. In cycling female rats, 2 injections of antagonist I blocked ovulation induced by exogenous LH RH in the second day of diestrous and chronic administration of antagonist I delayed spontaneous ovulation for at least 48 hr. The synthesis of this antagonist of LH RH capable of partially blocking LH release may be a first step toward the development of birth control methods based on synthetic peptides.",
author = "{Vilchez Martinez}, {J. A.} and Schally, {Andrew V} and Coy, {D. H.}",
year = "1974",
month = "12",
day = "1",
language = "English",
volume = "95",
pages = "213--218",
journal = "Endocrinology",
issn = "0013-7227",
publisher = "The Endocrine Society",
number = "1",

}

TY - JOUR

T1 - In vivo inhibition of LH release by a synthetic antagonist of LH releasing hormone (LH RH)

AU - Vilchez Martinez, J. A.

AU - Schally, Andrew V

AU - Coy, D. H.

PY - 1974/12/1

Y1 - 1974/12/1

N2 - The anti LH releasing hormone (LH RH) activity of des His2 desGly10 LH RH ethylamide (antagonist I), an analogue of LH RH, was studied in several animal systems. An i.v. infusion of antagonist I for 2 hr significantly inhibited LH release in response to the administration of LH RH in ovariectomized, estrogen and progesterone treated (OEP) rats and intact adult male rats. In OEP rats, a good dose response inhibition curve was found. Similarly, a quick injection of antagonist I was able to inhibit partially the LH release induced by LH RH in OEP rats. In addition, the high levels of serum LH in rats ovariectomized for 2 mth were lowered by the infusion of antagonist I. In cycling female rats, 2 injections of antagonist I blocked ovulation induced by exogenous LH RH in the second day of diestrous and chronic administration of antagonist I delayed spontaneous ovulation for at least 48 hr. The synthesis of this antagonist of LH RH capable of partially blocking LH release may be a first step toward the development of birth control methods based on synthetic peptides.

AB - The anti LH releasing hormone (LH RH) activity of des His2 desGly10 LH RH ethylamide (antagonist I), an analogue of LH RH, was studied in several animal systems. An i.v. infusion of antagonist I for 2 hr significantly inhibited LH release in response to the administration of LH RH in ovariectomized, estrogen and progesterone treated (OEP) rats and intact adult male rats. In OEP rats, a good dose response inhibition curve was found. Similarly, a quick injection of antagonist I was able to inhibit partially the LH release induced by LH RH in OEP rats. In addition, the high levels of serum LH in rats ovariectomized for 2 mth were lowered by the infusion of antagonist I. In cycling female rats, 2 injections of antagonist I blocked ovulation induced by exogenous LH RH in the second day of diestrous and chronic administration of antagonist I delayed spontaneous ovulation for at least 48 hr. The synthesis of this antagonist of LH RH capable of partially blocking LH release may be a first step toward the development of birth control methods based on synthetic peptides.

UR - http://www.scopus.com/inward/record.url?scp=0016086969&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0016086969&partnerID=8YFLogxK

M3 - Article

C2 - 4600113

AN - SCOPUS:0016086969

VL - 95

SP - 213

EP - 218

JO - Endocrinology

JF - Endocrinology

SN - 0013-7227

IS - 1

ER -