PMID: 9440241Jan 24, 1998Paper

Transition of serum vitellogenin cycle in Sakhalin taimen (Hucho perryi)

Comparative Biochemistry and Physiology. Part C, Pharmacology, Toxicology & Endocrinology
Naoshi HiramatsuAkihiko Hara

Abstract

A specific and sensitive enzyme-linked immunosorbent assay (ELISA) and a single radial immunodiffusion (SRID) were developed for measurement of serum vitellogenin (Vg) levels in Sakhalin taimen (Hucho perryi). Regarding specificity for serum Vg, an antiserum raised against lipovitellin of taimen (a-Lv) was adequate for both assays. ELISA and SRID could detect Vg in serum at concentrations as low as 10 ng/ml and 25 micrograms/ml, respectively. In estrogen administration experiments, the level of serum Vg began clearly increasing within 12 to 24 hr after injection of immature females with estradiol-17 beta (E2). The appearance and levels of Vg in males treated with E2 were delayed and smaller, respectively, than for females. Vg levels varied throughout natural vitellogenesis from 0-4 micrograms/ml (3 years old) to approximately 30 mg/ml (5-6 years old). We observed an early transitory peak of serum Vg levels (primary reaction) at the time of early vitellogenesis and chronic high Vg levels (for 6-7 months) in winter period before ovulation. Changes of serum E2 levels were correlated with Vg levels. However, E2 levels decreased a month earlier than Vg levels near ovulation. It appears that the duration of vitellogenesis in taimen i...Continue Reading

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Citations

Sep 22, 2010·Marine Biotechnology·Jun Zhang, Shicui Zhang
Oct 24, 2001·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·H FukadaA Hara
Jan 31, 2002·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Naoshi HiramatsuAkihiko Hara
Sep 7, 2001·Comparative Biochemistry and Physiology. Toxicology & Pharmacology : CBP·H HolbechP Bjerregaard
May 18, 2010·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Haruna AmanoAkihiko Hara
Feb 8, 2006·Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology·Naomi MikawaTakashi Aoki
Jun 9, 2005·Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology·Toshiaki FujitaAkihiko Hara

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