کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4341154 | 1295825 | 2008 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
An immunohistochemical study of the gonadotrophin-releasing hormone 1 system in solitary Cape mole-rats, Georychus capensis, and social Natal mole-rats, Cryptomys hottentotus natalensis
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کلمات کلیدی
SCNGnRHOVLTHPGMBHLHRHPBSPFAPOAorganum vasculosum of the lamina terminalis - ارگانواسکوئوزوم ترمینال لامیناimmunoreactive - ایمنی فعالdiagonal band - باند موربReproductive suppression - سرکوب تولید مثلDominance - سلطهmedial septum - سپتوم داخلیPhosphate-buffered saline - محلول نمک فسفات با خاصیت بافریPreoptic area - منطقه PreopticSuprachiasmatic nucleus - هستههای سوپراکیاسماتیکluteinizing hormone - هورمون جسم زردMediobasal hypothalamus - هیپوتالاموس MediobasalSubordination - وابستگیparaformaldehyde - پارافرمالدهیدSeasonal breeding - پرورش فصلی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علم عصب شناسی
علوم اعصاب (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: An immunohistochemical study of the gonadotrophin-releasing hormone 1 system in solitary Cape mole-rats, Georychus capensis, and social Natal mole-rats, Cryptomys hottentotus natalensis An immunohistochemical study of the gonadotrophin-releasing hormone 1 system in solitary Cape mole-rats, Georychus capensis, and social Natal mole-rats, Cryptomys hottentotus natalensis](/preview/png/4341154.png)
چکیده انگلیسی
Mole-rat species within the family Bathyergidae exhibit a wide range of reproductive strategies and social systems. Various forms of reproductive suppression are displayed within this family: in the solitary species, breeding is suspended for part of the year and in the social species, reproduction is suppressed in subordinate animals. This study investigated the gonadotrophin-releasing hormone 1 (GnHR-1) systems of breeding and non-breeding solitary Cape mole-rats and social Natal mole-rats for possible inter- and/or intra-species differences. In both species, GnRH-1 cell bodies are predominantly in the medial septum region of the diagonal band or the preoptic area, with relatively few in the mediobasal hypothalamus; a dense concentration of GnRH-1-immunoreactive (ir) processes is present in the region of the organum vasculosum of the lamina terminalis. In Cape mole-rats, GnRH-1-ir processes are particularly dense within the lateral margins of the median eminence, which is enfolded by a large pars tuberalis of the pituitary gland. Natal mole-rats display GnRH-1-ir processes across the breadth of the median eminence, which is abutted by a relatively small pars tuberalis. There are more GnRH-1-ir cell bodies in Natal mole-rats than in Cape mole-rats (â¼720 vs. â¼420). No significant differences were found in the number, distribution or size of GnRH-1-ir cell bodies according to season in Cape mole-rats or according to reproductive status or sex in Natal mole-rats. In female and male Natal mole-rats, GnRH-1-immunoreactivity in the median eminence is less dense in the reproductive animals; no such difference was found in Cape mole-rats between the breeding and non-breeding seasons. These immunohistochemical results are discussed in the light of earlier studies which identified no functional neuroendocrine impediments underlying regulated reproduction in either Cape or Natal mole-rats. The cumulative findings suggest that the principal factors determining seasonal or socially induced suppression of reproduction in these species are behavioral rather than neuroendocrine.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuroscience - Volume 157, Issue 1, 11 November 2008, Pages 164-173
Journal: Neuroscience - Volume 157, Issue 1, 11 November 2008, Pages 164-173
نویسندگان
M.K. Oosthuizen, N.C. Bennett, C.W. Coen,