ArticleJournal of cell communication and signaling2015
Gender-specific effects on food intake but no inhibition of age-related fat accretion in transgenic mice overexpressing human IGFBP-2 lacking the Cardin-Weintraub sequence motif.
Article in Journal of cell communication and signaling, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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0 citing papers in PubMed, 4 citations in OpenAlex.
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8 authors at 4 institutions in 3 countries.
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Abstract
IGFBP-2 affects growth and metabolism and is thought to impact on energy homeostasis and the accretion of body fat via its heparin binding domains (HBD). In order to assess the function of the HBD present in the linker domain (HBD1) we have generated transgenic mice overexpressing mutant human IGFBP-2 lacking the PKKLRP sequence and carrying a PNNLAP sequence instead. Transgenic mice expressed high amounts of human IGFBP-2, while endogenous IGFBP-2 or IGF-I serum concentrations were not affected. In both genders we performed a longitudinal analysis of growth and metabolism including at least 4 separate time points between the age of 10 and 52 weeks. Body composition was assessed by nuclear magnetic resonance (NMR) analysis. Food intake was recorded by an automated online-monitoring. We describe negative effects of mutant human IGFBP-2 on body weight, longitudinal growth and lean body mass (p < 0.05). Very clearly, negative effects of mutant IGFBP-2 were not observed for fat mass accretion throughout life. Instead, relative fat mass was increased in transgenic mice of both genders (p < 0.05). In male mice transgene expression significantly increased absolute mass of total body fat over all age groups (p < 0.05). Food intake was increased in female but decreased in male transgenic mice at an age of 11 weeks. Thus our study clearly provides gender- and time-specific effects of HBD1-deficient hIGFBP-2 (H1d-BP-2) on fat mass accretion and food intake. While our data are in principal agreement with current knowledge on the role of HB-domains for fat accretion we now may also speculate on a role of HBD1 for the control of eating behavior.
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