Induction of ovulation in goldfish by synthetic luteinizing hormone – releasing hormone (LH–RH)

Lam, T.J.; Pandey, S.; Hoar, William S.

doi:10.1139/z75-140

Cited by 39 publications

(23 citation statements)

References 12 publications

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“…Giving doses 600 to 1 500 times higher than ours induced ovulation in the ayu (Hirose and Hishida, 1974), the goldfish (Lam et al, 1975(Lam et al, , 1976, different species of carp (Conference on Application of Hormones to economic Fish, 1975), the Japanese medaka (Chan, 1977), the plaice and the goby (Aida et al, 1978).…”

Section: Introductionmentioning

confidence: 68%

“…The most empirically efficient procedure is to give two injections, the first containing 10 p. 100 of the total dose and the second 90 p. 100 (Antalfi and T61 9 , 1975). This classical so-called « hypophysation » has been tentatively replaced by LH-RH injections which induce ovarian maturation (Sokolowska, Popek and Bieniarz, 1978), or even ovulation (Conference on Application of Hormones to Economic Fish, 1975), in carp and ovulation in the ayu (Hirose and lshida, 1974), goldfish (Lam et al, 1975(Lam et al, , 1976, plaice and goby (Aida et al, 1978 Weil, 1973 ;Weil, Breton and Reinaud, 1975 ;Crim, Peter and Billard, 1976) and salmonids (Crim and Cluett, 1974 ;Weil et al, 1978). Exogenous gonadotropin injections increase estradiol production during vitellogenesis in trout and at the end of the cycle in carp (Fostier, Breton and Jalabert, 1979), but at that final stage in trout, Van Bohemen and Lambert (1979) did not detect aromatization enzymes in the ovary.…”

Section: Introductionmentioning

confidence: 99%

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Profiles of plasma gonadotropin and 17β-estradiol in the common carp, Cyprinus carpio L., as related to spawning induced by hypophysation or LH-RH treatment

Weil¹,

Fostier²,

Horváth

et al. 1980

Reprod. Nutr. Dévelop.

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Summary. Plasma gonadotropin (GTH) and 17p-estradiol (17p-E 2 ) levels and oocyte stage have been studied in the common carp, Cypinus carpio L., after classical « hypophysation » (two intraperitoneal pituitary injections of 0.3 mg/kg and 2.7 mg/kg at a 12-hr interval) or LH-RH treatment (two intracardiac injections of 3 fL9/ kg at a 3-hr interval). After the first pituitary injection of LH-RH treatment, GTH increase was followed by a significant increase of 17p-E 2 7 hrs after the injection. The higher GTH levels after the second pituitary injection did not increase that secretion. After classical « hypophysation », one-half of the females ovulated. There was no difference between spawning and non-spawning fishes in relation to hormonal parameters. LH-RH treatment only induced a shifting of the nucleus.Introduction.

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Section: Introductionmentioning

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Profiles of plasma gonadotropin and 17β-estradiol in the common carp, Cyprinus carpio L., as related to spawning induced by hypophysation or LH-RH treatment

Weil¹,

Fostier²,

Horváth

et al. 1980

Reprod. Nutr. Dévelop.

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“…Induction of oocyte maturation and/or ovulation has been reported in the carp (Sokolowska et al, 1978;Weil et al, 1980); goldfish (Lam et al, 1975) ; plaice, Pleuronectes platessa, and goby, Acanthogobius flavimanus (Aida et al, 1978;ayu, Plecoglossus altivelis (Hirose and Ishida, 1974) ; rainbow trout, Salmo gairdneri (Crim et al, 1983) ; and coho salmon, Oncorhynchus kisutch (Donaldson et al, 1981;Van Der Kraak et al, 1983 ) . On the other hand, in goldfish, single or multiple injections of LHRH or its analogues in different doses and regimes could not induce a very high rate of ovulation Sokolowska et al, 1984).…”

Section: Discussionmentioning

confidence: 99%

The effect of luteinizing hormone-releasing hormone analogue (LHRHa) in combination with different drugs with anti-dopamine and anti-serotonin properties on gonadotropin release and ovulation in the African catfish, Clarias gariepinus

et al. 1987

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Under hatchery conditions the reproduction of the African catfish depends on artificial induction of egg maturation and ovulation. In this study the effect of a number of potential psychotropic drugs with variable ~ti-dopamine and/or ~ti-~ro~nin properties in combination with LHRHa on gonadotropin release and ovulation was investigated.Drugs with a potent ~ti-dopaminer~c character caused a preovulatory go~dotropin surge, which seems to be independent of their anti-serotonergic properties. One drug, however, did not follow this rule. Drugs exhibiting low interaction with dopamine and high interaction with serotonin receptors had no effect on the LHRHa-induced gonadotropin release.

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“…The discovery of the primary structure of mammalian GnRH neurodecapeptide (Burgus et al, 1971) in the early 1970s was significant also with regard to possibilities of hormonal therapy of reproductive dysfunctions. The possibility of direct stimulation of gonadotropin cells secreting the fish's own luteinizing hormone (Lam et al, 1975) was added to a previously used type of hormonal therapy, which replaced the insufficient production of endogenous luteinizing hormone with exogenous luteinizing hormone (von Ihering, 1937). Along with the identification of the LH inhibition factor ) -dopamine -and use of DA antagonists, effective stimulation methods of LH secretion, the so-called hypothalamic approach , were developed, which can be applied to a wide range of fish species.…”

Section: Introductionmentioning

confidence: 99%

Induction of final oocyte maturation in Cyprinidae fish by hypothalamic factors: a review

Podhorec¹,

Kouřil²

2009

Vet. Med.

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Gonadotropin-releasing hormone in Cyprinidae as in other Vertebrates functions as a brain signal which stimulates the secretion of luteinizing hormone from the pituitary gland. Two forms of gonadotropin-releasing hormone have been identified in cyprinids, chicken gonadotropin-releasing hormone II and salmon gonadotropinreleasing hormone. Hypohysiotropic functions are fulfilled mainly by salmon gonadotropin-releasing hormone. The only known factor having an inhibitory effect on LH secretion in the family Cyprinidae is dopamine. Most cyprinids reared under controlled conditions exhibit signs of reproductive dysfunction, which is manifested in the failure to undergo final oocyte maturation and ovulation. In captivity a disruption of endogenous gonadotropinreleasing hormone stimulation occurs and sequentially that of luteinizing hormone, which is indispensible for the final phases of gametogenesis. In addition to methods based on the application of exogenous gonadotropins, the usage of a method functioning on the basis of hypothalamic control of final oocyte maturation and ovulation has become popular recently. The replacement of natural gonadotropin-releasing hormones with chemically synthesized gonadotropin-releasing hormone analogues characterized by amino acid substitutions at positions sensitive to enzymatic degradation has resulted in a centuple increase in the effectiveness of luteinizing hormone secretion induction. Combining gonadotropin-releasing hormone analogues with Dopamine inhibitory factors have made it possible to develop an extremely effective agent, which is necessary for the successful artificial reproduction of cyprinids.Keywords: reproductive dysfunction; ovulation; luteinizing hormone; gonadotropin-releasing hormone; gonadotropin; dopamine; dopamine antagonist; cyprinids List of abbreviations DA = dopamine; DI = dopamine antagonist; EU = European Union; GnRH = gonadotropin-releasing hormone; GnRHa = gonadotropin-releasing hormone analogue; cGnRH-II = chicken gonadotropin-releasing hormone II; mGnRH = mammalian gonadotropin-releasing hormone; sGnRH = salmon gonadotropin-releasing hormone; GPCR = G-protein coupled receptor; LH = luteinizing hormone; MRL = minimum residual limit; IM = intramuscular injection; IP = intraperitoneal injection; PCC = pericardial cavity injection; IV = intravenous injection

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Induction of ovulation in goldfish by synthetic luteinizing hormone – releasing hormone (LH–RH)

Abstract: Synthetic luteinizing hormone – releasing hormone was found to be effective in inducing ovulation in goldfish after three daily injections of 2 μg/g intracranially or of 10 μg/g intraperitoneally.

Cited by 39 publications

References 12 publications

Profiles of plasma gonadotropin and 17β-estradiol in the common carp, Cyprinus carpio L., as related to spawning induced by hypophysation or LH-RH treatment

Profiles of plasma gonadotropin and 17β-estradiol in the common carp, Cyprinus carpio L., as related to spawning induced by hypophysation or LH-RH treatment

The effect of luteinizing hormone-releasing hormone analogue (LHRHa) in combination with different drugs with anti-dopamine and anti-serotonin properties on gonadotropin release and ovulation in the African catfish, Clarias gariepinus

Induction of final oocyte maturation in Cyprinidae fish by hypothalamic factors: a review

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