Cited by 74Reproductive System and PregnancyEstrogen and related hormone effectsReproductive Biology and Fertility

Role of Histamine in Implantation: Dexamethasone Inhibits Estradiol-Induced Implantation in the Rat1

Johnson, D. C., Dey, S. K.·1980·Biology of Reproduction

Abstract

Delayed implantation was achieved by injecting progesterone (2 mg/day) into pregnant rats hypophysectomized 48 to 72 h after spermatozoa were found in vaginal flushings. A single i.v. dose of 20 ng (≅ 80 ng/kg BW) of estradiol (E2) induced a full complement of implantation sites (6.0 ± 0.32 sites/uterine horn) in all animals. A dose of 40 ng/kg of E2 was the minimal dose which induced implantation in all animals; the number of sites, however, was reduced by 50%. A normal number of implantation sites was obtained when histamine dihydrochloride (histamine) was injected i.p. at the same time E2 was given. The number of animals with sites and the number of sites increased in rats given one dose of histamine plus 30, but not 20, ng/kg of E2. Three doses of histamine given at 4 h intervals augmented 20 ng/kg of E2 and induced implantation in 87% of the rats. Dexamethasone administered s.c. for 4 days inhibited implantation in 80% of the rats given E2 but this could be overcome by injection of two doses of histamine. Injection of dexamethasone simultaneously with E2 had no effect, and when given up to 4 h before E2 had little effect upon implantation. However, when given 6 h or more before E2, the glucocorticoid drastically reduced both the number of animals with implantation sites and the number of sites. The inhibition induced by 6 h of exposure to dexamethasone could be completely reversed by administration of three doses (250 μg each) of prostaglandin E2 (PGE2). With longer exposure to the corticoid this amount of PGE2 was less effective. Extrapolating the effects of anti-inflamatory glucocorticoids in other tissues, we suggest that at least part of the effect of histamine in augmenting implantation induced by estrogen involves an increase in prostaglandin synthesis.

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Crossref · 10.1093/biolreprod/22.5.1136

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Authors
Johnson, D. C., & Dey, S. K.
Affiliations
University of Kansas Medical Center (US)
Venue
Biology of Reproduction
Published
1980-06-01
Volume
22
Issue
5
Pages
1136-1141
ISSN
  • 0006-3363 (ISSN-L)
  • 1529-7268
OpenAlex
W2409854994
Cited by
74
References
0
Citations by year
2023: 1 · 2022: 1 · 2021: 2 · 2020: 3 · 2019: 1 · 2017: 5 · 2015: 3 · 2014: 2 · 2013: 4 · 2012: 1
FWCI
1.28
Type
journal article
Language
en
Open access
closed
Locations
  • Biology of Reproduction (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Reproductive System and Pregnancy
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Estrogen and related hormone effects
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Reproductive Biology and Fertility
Keywords
histamine, implantation, dexamethasone, estradiol, progesterone, delayed implantation, prostaglandin E2, glucocorticoids, prostaglandin synthesis, endometrial receptivity
MeSH terms
Animals, Blastocyst, Dexamethasone, Estradiol, Estrogen Antagonists, Female, Histamine, Hypophysectomy, Embryo Implantation, Rats

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