کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2067690 1077905 2007 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Increased hormone levels in Tetrahymena after long-lasting starvation
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی بیوفیزیک
پیش نمایش صفحه اول مقاله
Increased hormone levels in Tetrahymena after long-lasting starvation
چکیده انگلیسی
Tetrahymena contains vertebrate hormone-like materials. The level of one of these, insulin increased during starvation in a previous experiment. We hypothesized that other hormones are also influenced by starvation. To prove the hypothesis Tetrahymena pyriformis cultures were (1) starved for 24 h; (2) starved for 24 h and re-fed for 30 min or (3) starved for 30 min. Amount and localization of vertebrate-like hormones, produced by Tetrahymena, β-endorphin, adrenocorticotropin (ACTH), serotonin, histamine, insulin and triiodothyronine (T3) were studied by immunocytochemical methods using flow cytometry and confocal microscopy. Long starvation elevated with 50% the hormone levels, while short starvation moderately elevated only the serotonin level in the cells. After short re-feeding endorphin and histamine returned to the basal level, ACTH and serotonin approached the basal level, however, remained significantly higher, while insulin and T3 stood at the starvation level. The results show that such a stress as long starvation provokes the enhanced production of hormones which likely needed for tolerating the life-threatening effect of stress.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cell Biology International - Volume 31, Issue 9, September 2007, Pages 924-928
نویسندگان
, , ,