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Autoradiographic localization of gonadotrophin receptors in ovaries of the common carp, Cyprinus carpio L

Journal Article · · Gen. Comp. Endocrinol.; (United States)
;

Binding sites for carp gonadotrophin have been located in carp ovaries using (/sup 125/I)labeled gonadotrophin and autoradiography. The radioactive gonadotrophin was displaced from tissue by unlabeled gonadotrophin or carp hypophysial homogenate in a dose-dependent fashion. No binding of gonadotrophin was found in previtellogenic oocytes but binding appeared with the first indications of vitellogenesis. In the smaller vitellogenic oocytes binding was uniformly distributed in the follicular envelope, but in the largest oocytes binding was restricted to the interstitial tissue. In these more mature oocytes gonadotrophin was also found within the oocyte and appeared to migrate toward the nucleus. The relationship between binding location, steroidogenesis, and oocyte maturation is discussed. We found no evidence for specific binding of (/sup 125/I)thyroxine under comparable conditions.

Research Organization:
Dept. of Ichthyobiology and Fisheries, Krakow, Poland
OSTI ID:
6791765
Journal Information:
Gen. Comp. Endocrinol.; (United States), Journal Name: Gen. Comp. Endocrinol.; (United States) Vol. 1; ISSN GCENA
Country of Publication:
United States
Language:
English

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Related Subjects

550301* -- Cytology-- Tracer Techniques
59 BASIC BIOLOGICAL SCIENCES
AMINO ACIDS
ANIMALS
AQUATIC ORGANISMS
AUTORADIOGRAPHY
BETA DECAY RADIOISOTOPES
BIOCHEMICAL REACTION KINETICS
BODY
CARBOXYLIC ACIDS
DAYS LIVING RADIOISOTOPES
ELECTRON CAPTURE RADIOISOTOPES
FEMALE GENITALS
FISHES
GAMETOGENESIS
GONADOTROPINS
GONADS
HORMONES
INTERMEDIATE MASS NUCLEI
IODINE 125
IODINE ISOTOPES
ISOTOPES
KINETICS
MEMBRANE PROTEINS
NUCLEI
ODD-EVEN NUCLEI
OOGENESIS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC IODINE COMPOUNDS
ORGANS
OVARIES
PEPTIDE HORMONES
PITUITARY HORMONES
PROTEINS
RADIOISOTOPES
REACTION KINETICS
RECEPTORS
THYROID HORMONES
THYROXINE
VERTEBRATES