Affiliation:
1. Max-Planck-Institut für physiologische und klinische Forschung, W. G. Kerckhoff-Institut, D-61231 Bad Nauheim
2. Institut für Experimentelle Endokrinologie, Medizinische Fakultät (Charité) der Humboldt-Universität zu Berlin, D-10098 Berlin, Germany
Abstract
Schmidt, Ingrid, Corinna Schoelch, Thomas Ziska, Darius Schneider, Eckhart Simon, and Andreas Plagemann. Interaction of genetic and environmental programming for disturbances of the leptin system and for obesity. Physiol Genomics 3: 113–120, 2000.—Possible adverse interactions between an usually inconspicuous genetic trait and early environmental factors favoring the development of obesity were investigated in rats heterozygous for the leptin receptor defect “ fatty” ( fa). Pups were exposed to early postnatal overfeeding by reducing litter size from normally 10–12 to only 4. Rearing +/+ and +/ fa pups from day 3 to 21 in small litters increased fat-free dry mass and body fat, but only in the latter did a significant interaction with genotype occur. Pronounced differences in the responsiveness of +/+ and +/ fa pups to “prophylactic” leptin treatment (from day 1 to 21) were observed, with +/ fa females from small litters being nearly as fat and unresponsive as previously reported for normally reared fa/ fa pups. Clear heterozygous differences in total hypothalamic leptin binding, but no litter size effect, paralleling the differences in leptin responsiveness, were observed. By early postnatal overfeeding an usually inconspicuous genetic trait may thus become etiologic for the development of obesity via physiological changes other than the decreased leptin binding characterizing the genetic defect.
Publisher
American Physiological Society
Cited by
46 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献