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-   -   هرمون جديد مكتشف عام 1994يسمي اللبتينhuman leptin له اهمية كبيرة في تنظيم السكر (http://www.biochemistry4all.com/forums/showthread.php?t=4617)

ehab10f 01-17-2007 04:42 AM

هرمون جديد مكتشف عام 1994يسمي اللبتينhuman leptin له اهمية كبيرة في تنظيم السكر
 
1 مرفق
Leptin hormone, discovered in 1994 (Zhang et al), is produced mainly by adipose tissue.
This hormone has turned out to be involved in multiple processes in human physiology. At
first, interest was focused on the role of leptin in the control of body weight regulation and
satiety (Pelleymounter et al 1995, Halaas et al 1995, Campfield et al 1995). Since then,
the interactions between glucose, insulin, and leptin in various experimental and clincal
conditions, e.g., in diabetes mellitus, have been under intensive study (Malmström et al
1996). It has become evident that leptin takes part in numerous other processes, such as
angiogenesis and reproduction, as well (Cioffi et al 1996)
Gender differences have been a constant finding in leptin studies: In adults and children,
independently of fat mass, females have higher leptin concentrations than males
(Considine et al 1996, Hassink et al 1996), thus reflecting the regulatory effect of other
factors, such as hormones, on leptin metabolism.
Animal studies have shown the presence of high levels of gene expression for leptin, and
for the leptin receptor during fetal development (Hoggard et al 1997a). In humans,
gestational age (Jaquet et al 1998), birth weight (Sivan et al 1997), and type of fetal
growth (Koistinen et al 1997) are important determinants of cord plasma leptin
concentration.

ehab10f 01-17-2007 04:57 AM

Dear Bioc
ارجو قراءة الموضوع وكتابة التعليق وكذلك جميع الاخوة الزملاء في المنتدي والاعضاء ايضا
شكرا
د/ ايهاب

رامي فواز 06-19-2011 05:40 PM

شـكــ وبارك الله فيك ـــرا لك ... لك مني أجمل تحية .

ayad 12-03-2011 01:35 AM

جميل جداااا


الساعة الآن 12:07 AM

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