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، جلد ۱۱، شماره ۵، صفحات ۴۵-۵۱
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| عنوان فارسی |
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| چکیده فارسی مقاله |
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| کلیدواژههای فارسی مقاله |
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| عنوان انگلیسی |
Estradiol Affects Prolactin Producing Cells and Calcium levels in a Teleost, Heteropneustesfossilis, Kept in Different Calcium Concentrations |
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| چکیده انگلیسی مقاله |
Background: This study investigated the effects of estradiol on plasma calcium and prolactin cells of Heteropneustes fossilis kept in calcium-deficient and normal freshwater. Methods: Fish were deprived of food and divided into groups A-D. Group A and B were kept in artificial freshwater with normal electrolytes. Group C and D were maintained in calcium-deficient freshwater. Vehicle was administered to groups A and C. Groups B and D were injected with estradiol. Plasma calcium levels and prolactin cells were studied after 1, 3, 5, 10 and 15 days. Results: Normal-calcium freshwater: In group A calcium levels remained unaffected. In group B, estradiol provoked hypercalcemia from day 3 to 10 although calcium decreased after day 15. Prolactin cells in group B became degranulated after 10day. Nuclear volume increased from day 10 onwards. Calcium-deficient freshwater: Calcium levels in group C decreased from day 1 to 3 thereafter increased from day 5 to 15. Plasma calcium of group D increased from day 3 to 15. In group C prolactin cells exhibited hyperactivity on day 3 and degranulation on day 5. Nuclear volume increased from day 5 onwards. On day 10 and 15 certain cells became degenerated. In group D degranulation of prolactin cells began on day 3 which proceeded to complete degranulation on day 10. Nuclear volume increased from day 5 onwards. Conclusions: Estradiol enhanced prolactin production and increased blood calcium in food-deprived fishes kept in calcium-deficient medium suggesting that calcium needed for elevation of blood calcium was derived from internal sources. |
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| کلیدواژههای انگلیسی مقاله |
Calcium, Catfishes, Estradiol, Fishes, Prolactin |
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| نویسندگان مقاله |
| Susmita Srivastav
Department of Zoology, Shiv Harsh Kisan P. G. College, Basti-272001, India.
| Diwakar Mishra
Department of Zoology, Government Girls’ P. G. College, Ghazipur-233001, India.
| Sunil Kumar Srivastav
Department of Zoology, D. D. U. Gorakhpur University, Gorakhpur-273009, India.
| Nobuo Suzuki
PhD. Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Ogi, Noto-cho, Ishikawa, Japan.
| Ajai Kumar Srivastav
Department of Zoology, D. D. U. Gorakhpur University, Gorakhpur-273009, India.
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| نشانی اینترنتی |
http://ijt.arakmu.ac.ir/browse.php?a_code=A-10-74-4&slc_lang=en&sid=1 |
| فایل مقاله |
اشکال در دسترسی به فایل - ./files/site1/rds_journals/2737/article-2737-2049576.pdf |
| کد مقاله (doi) |
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| زبان مقاله منتشر شده |
en |
| موضوعات مقاله منتشر شده |
عمومی |
| نوع مقاله منتشر شده |
پژوهشی |
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