Seasonal changes in plasma steroid levels in Indian major carp : influence of homologous pituitary extract on steroid production and development of oocyte maturational competence

Sen, Utsav; Mukherjee, Dilip; Sp, Bhattacharyya

doi:10.1016/s0016-6480(02)00060-6

Cited by 48 publications

(24 citation statements)

References 64 publications

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“…Testosterone (T) has been identified in plasma of female teleosts and may be utilized as the major aromatizable androgen [17].…”

Section: Discussionmentioning

confidence: 99%

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Seasonal Fluctuations of Sex Steroid Hormones in Indian Major Carp Catla Catla in Khouzestan, Iran

Sehafii¹,

Khodadadi²

2014

J Environ Anal Toxicol

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“…Testosterone (T) has been identified in plasma of female teleosts and may be utilized as the major aromatizable androgen [17].…”

Section: Discussionmentioning

confidence: 99%

“…Different study have been accomplished on seasonal fluctuation of sex steroid hormone levels in different species like vocal plainfin midshipman [14], Epinephelus coioides [15], Leuciscus cephalus [16], Labeo rohita [17], Huso huso [18], Esox lucius [19].…”

Section: Introductionmentioning

confidence: 99%

Seasonal Fluctuations of Sex Steroid Hormones in Indian Major Carp Catla Catla in Khouzestan, Iran

Sehafii¹,

Khodadadi²

2014

J Environ Anal Toxicol

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“…1, 2 and 3 that ovaries present in the fish of without treated with vitamin C were small in size while the size of ovary was comparatively larger in their weight and length. This has been shown for many fish like major carps (Sen et al 2002, Day et al 2004, Bhattacharyya and Maitra 2006. It is known that major carps spawn during the monsoon season when rainfall is at maximum of the year and a casual relation existed between these parameters as was reported by earlier workers (Jhingran 1986, Jhingran and Pullin 1985, Pillay and Kutty 2005.…”

Section: Discussionmentioning

confidence: 67%

“…Shrestha (1980) described the ovarian cycle of Noemacheilus beavani and divided it into seven distinct phases. Sen et al (2002) Several criteria have been employed for staging the process of oocyte development. These criteria are size, amount and distribution of various cell inclusions (Nagahama 1983).…”

Section: Introductionmentioning

confidence: 99%

DIETARY SUPPLEMENTATION OF VITAMIN C, L-ASCORBATE 2-TRIPHOSPHATE CALCIUM (LATP-Ca) ON OOCYTE DEVELOPMENT OF MAJOR CARP ROHU (LABEO ROHITA) REARED IN A NATURAL CONCRETE POND

Labh

2014

Ecoprint

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The aim of this study was to evaluate the effect of vitamin C L-ascorbate 2-triphosphate (LATP-Ca) on Indian major carp rohu (Labeo rohita) (Hamilton) during intensive aquaculture. Rohu were fed with vitamin C (LATP-Ca) supplementation at doses of D 1 (control) and D 2 (500 mg/kg) diet for 10 weeks. The effects were assessed by comparing the treated groups of fish to that of control group. Vitamin C (LATP-Ca) supplementation exerted significant (P<0.05) effects on oocyte development of rohu (Labeo rohita). A number of distinct developmental stages of oocyte can be delineated and oocyte growth in major carp rohu (Labeo rohita) found in two distinct phases; primary growth phase (PGP) and the secondary growth phase (SGP). In PGP, oogonia, chromatin nucleolus, early and peri nucleolus stage oocyte with Balbiani's vitelline body were observed while two types of inclusions, lipid and protein, respectively were formed during vitellogenesis in the SGP. SGP development was found for a short period of time as compared to PGP. Similarly, development of oocyte was very poor in fish fed with controlled diet.

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“…The method of extraction of E 2 from plasma and incubation medium was similar to the previously described procedure for this steroid (Mukherjee et al 2001, Sen et al 2002. Anti-E 2 serum was highly specific and cross-reacted with E 2 , testosterone, 17a-hydroxyprogesterone, and cortisol at 100, 1, !0 .…”

Section: Extraction and Assay Of Steroidsmentioning

confidence: 99%

Stimulation of salmon calcitonin on secretion of 17β-estradiol by the ovarian follicles of common carp, Cyprinus carpio

Paul

Mukherjee²,

Pramanick³

et al. 2007

Journal of Endocrinology

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The effects of salmon calcitonin (sCT) on the secretion of 17b-estradiol (E 2 ) were examined in female common carp, Cyprinus carpio. Vitellogenic stage fish adapted to high-Ca water were i.p. injected with vehicle, sCT, human chorionic gonadotropin (hCG), or hCG plus sCT. To determine whether ovarian follicles are equipped with CT receptors, a CT binding assay was conducted. In the in vitro experiments, vitellogenic follicles were incubated with stimulators and inhibitors. Administration of sCT increased the basal and hCG-stimulated E 2 release in vivo and in vitro. Binding characteristics of [ 125 I]sCT to plasma membrane preparation of carp ovarian follicles showed saturability with high-affinity (K d Z48 . 48 pmol/l and B max Z1 . 2 pmol/mg protein). To clarify the mechanism of E 2 production by sCT, in vitro effect of sCT and hCG on aromatase activity (conversion of testosterone to E 2 ) and cytochrome P450 aromatase (P450arom) gene expression in carp ovarian follicles were investigated. Salmon CT-stimulated both aromatase activity and P450arom gene expression in ovarian follicles of carp. sCT-stimulated E 2 release by the ovarian follicles in vitro was augmented in the presence of dibutyryl cAMP. Inhibitor of protein kinase A (PKA), SQ 22536 inhibited sCT-stimulated steroid production in a dose-dependent manner. Specific inhibitor of protein kinase C (PKC), NPC-15437 dihydrochloride had no inhibitory effects on sCT-induced E 2 release. The present study indicates that sCT binds specifically to carp ovary and stimulates E 2 production by increasing the activity of cytochrome P450 aromatase and P450arom gene expression. The results further suggest that stimulatory action of sCTon E 2 production is mediated through cAMP pathway.

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Seasonal changes in plasma steroid levels in Indian major carp : influence of homologous pituitary extract on steroid production and development of oocyte maturational competence

Cited by 48 publications

References 64 publications

Seasonal Fluctuations of Sex Steroid Hormones in Indian Major Carp Catla Catla in Khouzestan, Iran

Seasonal Fluctuations of Sex Steroid Hormones in Indian Major Carp Catla Catla in Khouzestan, Iran

DIETARY SUPPLEMENTATION OF VITAMIN C, L-ASCORBATE 2-TRIPHOSPHATE CALCIUM (LATP-Ca) ON OOCYTE DEVELOPMENT OF MAJOR CARP ROHU (LABEO ROHITA) REARED IN A NATURAL CONCRETE POND

Stimulation of salmon calcitonin on secretion of 17β-estradiol by the ovarian follicles of common carp, Cyprinus carpio

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