کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2062681 1076617 2012 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Expression of ghrelin receptor (GHSR-1a) in rat epididymal spermatozoa and the effects of its activation
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم دامی و جانورشناسی
پیش نمایش صفحه اول مقاله
Expression of ghrelin receptor (GHSR-1a) in rat epididymal spermatozoa and the effects of its activation
چکیده انگلیسی

In this study we demonstrated the expression of the ghrelin receptor GHSR-1a in rat spermatids and epididymal spermatozoa, as well as some effects of ghrelin on the spermatozoa in vitro. For the demonstration of GHSR-1a the immunocytochemical, immunofluorescence and Western blotting techniques were applied using three different types of antibodies. The response of spermatozoa to ghrelin was tested in a series of in vitro experiments and their effects were evaluated using confocal microscopy and flow cytometry. GHSR-1a protein was found as expressed in the Golgi and acrosomes of spermatids and acrosome regions or the head cell membrane of epididymal spermatozoa. The GHSR-1a expression in spermatozoa was also confirmed by Western blot. No differences were found in percentage of spermatozoa showing annexin-V binding and expression of active form caspase-3 between control and ghrelin-treated spermatozoa. This result may indicate no pro-apoptotic effects of ghrelin neither at 10−9 nor 10−6 mol/L concentration. Ghrelin (10−6 mol/L) increased free intracellular calcium ion concentration in the rat spermatozoa. Moreover, stimulation with 10−6 mol/L ghrelin increased, while 10−4 mol/L ghrelin decreased the number of spermatozoa showing progressive motility. In conclusion, the expression of the GHSR-1a receptor in spermatozoa, as well as ghrelin influences on sperm motility and intracellular calcium ion concentration suggest that such biological effects of ghrelin may be produced under in vivo conditions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Reproductive Biology - Volume 12, Issue 3, November 2012, Pages 293–300
نویسندگان
, , , , , , , , ,