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Iranian Journal of Toxicology، جلد ۱۱، شماره ۵، صفحات ۴۵-۵۱
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عنوان انگلیسی Estradiol Affects Prolactin Producing Cells and Calcium levels in a Teleost, Heteropneustesfossilis, Kept in Different Calcium Concentrations
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.
کلیدواژه‌های انگلیسی مقاله Calcium, Catfishes, Estradiol, Fishes, Prolactin
نویسندگان مقاله susmita srivastav | susmita srivastav
department of zoology, shiv harsh kisan p. g. college, basti-272001, india.


diwakar میشرا | diwakar mishra
department of zoology, government girls’ p. g. college, ghazipur-233001, india.


سانیل کومار srivastav | sunil kumar srivastav
department of zoology, d. d. u. gorakhpur university, gorakhpur-273009, india.


nobuo suzuki | nobuo suzuki
phd. noto marine laboratory, institute of nature and environmental technology, kanazawa university, ogi, noto-cho, ishikawa, japan.


ajai کومار srivastav | ajai kumar srivastav
department of zoology, d. d. u. gorakhpur university, gorakhpur-273009, india.
نشانی اینترنتی http://ijt.arakmu.ac.ir/browse.php?a_code=A-10-74-4&slc_lang=en&sid=en
فایل مقاله اشکال در دسترسی به فایل - ./files/site1/rds_journals/138/article-138-423020.pdf
کد مقاله (doi)
زبان مقاله منتشر شده en
موضوعات مقاله منتشر شده عمومی
نوع مقاله منتشر شده پژوهشی
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