Mechanisms of Action of Free Arachidonic Acid on Ovarian Steroid Production in the Goldfish

Mercure, François; Kraak, Glen Van Der

doi:10.1006/gcen.1996.0054

Cited by 72 publications

(43 citation statements)

References 3 publications

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“…II), both of these oil supplementations in the broodstock diet were considered necessary for efficient breeding response as evidenced in D-V. However, the greater breeding response in the D-III groups than in D-IV might be due to the presence of high amounts of both 18:2(n-6) and 20:4(n-6) and conversion of 18:2(n-6) to 20:4(n-6) PUFA [23,40,41] which has a stimulatory effect on the ovarian follicles in steroid production [28].…”

Section: Discussionmentioning

confidence: 98%

“…Despite relative paucity of work on broodstock nutrition, the nutritional status of broodstock is known to have a profound effect on the reproductive performance and quality of offspring in several species. Studies performed on nile tilapia, turbot, lake trout, goldfish and yellow tail [16,19,25,26,28,29,36,46,47] have demonstrated that incorporation of essential nutrients into the developing eggs depends on the availability of these nutrients in the female broodstock and consequently on the dietary input in the period preceding gonadal maturity. In this context, supply of dietary n-3 highly unsaturated fatty acids (HUFA) is known to improve broodstock performance [27].…”

Section: Introductionmentioning

confidence: 99%

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Effect of dietary supplementation of fatty acids and vitamins on the breeding performance of the carp Catla catla

et al. 2001

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-Five isonitrogenous diets (∼33% crude protein) were fed to the brood female carp, Catla catla (weighing 3.0 to 5.5 kg), for a period of 93 days in order to observe their breeding performance in earthen ponds. Diet-I (control) contained only basic ingredients like rice bran, groundnut oil cake, roasted soybean meal, fish meal and mineral mixture; diet-II contained added vitamins; diet-III contained added vitamins and vegetable oil (rich in n-6 polyunsaturated fatty acids, PUFA); diet-IV contained added vitamins and fish oil (rich in n-3 PUFA); and diet-V contained added vitamins and a mixture of vegetable and fish oils. The results showed that nutritional quality of the diet considerably influenced breeding performance in the species. The total number of matured females was the highest in the diet-V group and maturity was advanced by 35 days in this group compared to the control. In diet-III and diet-V groups, all the maturated females bred fully and the relative fecundity was increased significantly in diet III, IV and V. The maximum (73.4%) fertilisation rate was observed in the diet-V group, followed by 61.3%, 56.8%, 49% and 22.7% in diet-I, diet-IV, diet-III and diet-II groups respectively. Most of the eggs in the diet-II treatment group remained immature. The various data thus obtained suggest that dietary supplementation of both n-3 and n-6 PUFA, is essential to improve gonadal maturation, breeding performance and spawn recovery in the Catla female broodstock. diet / fatty acid / broodstock / breeding performance / Catla Reprod. Nutr. Dev. 41 (2001) 365-375 365

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Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Effect of dietary supplementation of fatty acids and vitamins on the breeding performance of the carp Catla catla

et al. 2001

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“…In marine fish, EPA and, especially, DHA are regarded as EFAs due to their necessity for good growth. ARA stimulates testicular testosterone production in goldfish testes and ovaries by conversion to prostaglandin (Wade and Van Der Kraak 1993;Mercure and Van Der Kraak 1996). There is strong evidence that HUFAs, particularly EPA, DHA and ARA, are involved in steroidogenesis and oocyte maturation in vertebrates via metabolites formed from the cyclooxygenase and lipoxygenase pathways (Murdoch et al 1993).…”

Section: Discussionmentioning

confidence: 99%

Effect of hormone injection frequency on the lipid content and fatty acid compositions in gonad, muscle and liver of Anguilla japonica during artificial maturation

Rupia

Shen

et al. 2013

Aquacult Int

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Two groups of Anguilla japonica were treated with hormone, one on a weekly basis, the other on a biweekly basis. Intramuscular injection was applied at a dose of 0.75 mg/kg BW carp pituitary extract (CPE) plus 150 IU/kg BW human chorionic gonadotropin (hCG) for female fish, while males received half of this dose. The average total lipid content of the gonads from the weekly treated group, i.e. 20.6 ± 1.2 % for females and 18.0 ± 2.3 % for males, was significantly higher than the biweekly treated group, 16.8 ± 0.7 and 15.5 ± 1.3 %, respectively (p \ 0.05). For both muscle and liver, the readings were not significantly different. The gonads from the weekly treated fish had more fatty acids, particularly saturated fatty acids, polyunsaturated fatty acids, highly unsaturated fatty acids, eicosapentaenoic acid (20:5n-3, EPA), docosahexaenoic acid (22:6n-3, DHA) and arachidonic acid (20:4n-6, ARA). Histological examination showed that the ovaries of both the weekly and the biweekly treated fish were mainly at stage IV. However, the weekly treated females had bigger oocyte diameter (722.0 ± 60.9 lm) than the biweekly females (611.6 ± 22.6 lm). These results suggest that CPE and hCG promoted the maturation process for both scheduled induction and that the frequency of hormone injection influenced the biochemical composition of gonads, especially their lipids. Our study describes for the first time the effect of hormone injection frequency on the lipid content and fatty acid composition in the gonads of A. japonica during artificial maturation.

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“…ARA is the precursor of biologically active eicosanoids, such as prostaglandins and leukotrienes, that are involved in many aspects of reproduction (e.g. Goetz and Garczynski, 1997;Kobayashi et al, 2002;Mercure and Van Der Kraak, 1996;Stacey and Goetz, 1982;Stocco et al, 2005). In addition, ARA can act directly on steroid biosynthesis, at least in mammals, as a regulator of the steroidogenic acute regulatory protein (StAR), which mediates transport of cholesterol across the mitochondrial membrane in a rate-limiting step in steroidogenesis (Stocco, 2001;Stocco et al, 2005;Wang et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

“…Changes in cyp19a1a gene expression and P450aromatase enzyme activity are major regulators of ovarian production of E2 during reproduction and development (Chang et al, 1997). The ARA derived prostaglandin PGE2 stimulates ovarian synthesis of E2 in mammals, and ARA stimulates synthesis of testosterone (T) and E2 in vitro in goldfish (Carassius auratus) and zebrafish (Danio rerio) ovarian follicles (Abayasekara and Wathes, 1999;Lister and Van Der Kraak, 2008;Mercure and Van Der Kraak, 1996;Van Der Kraak and Chang, 1990).…”

Section: Introductionmentioning

confidence: 99%

Effects of Dietary Arachidonic Acid on the Reproductive Physiology of Female Atlantic Cod (Gadus morhua L.).

Norberg¹,

Hamre²,

Andersson³

et al. 2008

Biology of Reproduction

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a b s t r a c tThe present study was designed to investigate potential effects of arachidonic acid (ARA) on the reproductive physiology of female Atlantic cod (Gadus morhua L.).Two-year old Atlantic cod of both sexes were equally distributed into eight sea cages after completion of their first spawning in May 2005. Four experimental groups were established and fed diets with different levels of ARA corresponding to 0.5, 1, 2 and 4% of total fatty acid. Ovarian growth and development was documented every month. Fatty acid composition was analysed in ovaries, liver and plasma at the beginning of the experiment, one month prior to spawning, and in spent fish, one month after spawning was completed. Plasma concentrations of estradiol-17b, testosterone and vitellogenin, and ovarian gene transcript levels of steroidogenic acute regulatory protein (star), P450aromatase (cyp19a1a) and 20b-hydroxy steroid dehydrogenase (20bhsd/cbr1) were monitored every month in fish fed the experimental diets and related to oocyte stage. Potential fecundity was calculated based on ovarian samples taken one month before onset of spawning.Ovarian and plasma ARA levels were highly correlated to dietary ARA levels. There was a net accumulation of ARA compared to other essential fatty acids in ovarian tissue that was reflected in a decrease in EPA:ARA ratio. Plasma concentrations of vitellogenin, estradiol-17b and testosterone and key gene transcript levels were affected by dietary ARA and stage of maturation. The results show that ARA has a significant influence on the reproductive physiology of female Atlantic cod.

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Mechanisms of Action of Free Arachidonic Acid on Ovarian Steroid Production in the Goldfish

Cited by 72 publications

References 3 publications

Effect of dietary supplementation of fatty acids and vitamins on the breeding performance of the carp Catla catla

Effect of dietary supplementation of fatty acids and vitamins on the breeding performance of the carp Catla catla

Effect of hormone injection frequency on the lipid content and fatty acid compositions in gonad, muscle and liver of Anguilla japonica during artificial maturation

Effects of Dietary Arachidonic Acid on the Reproductive Physiology of Female Atlantic Cod (Gadus morhua L.).

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