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Fat apoptosis through targeted activation of caspase 8: a new mouse model of inducible and reversible lipoatrophy
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Fat apoptosis through targeted activation of caspase 8: a new mouse model of inducible and reversible lipoatrophy
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Journal Article
Fat apoptosis through targeted activation of caspase 8: a new mouse model of inducible and reversible lipoatrophy
2005
Overview
We describe the generation and characterization of the first inducible 'fatless' model system, the FAT-ATTAC mouse (fat apoptosis through targeted activation of caspase 8). This transgenic mouse develops identically to wild-type littermates. Apoptosis of adipocytes can be induced at any developmental stage by administration of a FK1012 analog leading to the dimerization of a membrane-bound, adipocyte-specific caspase 8–FKBP fusion protein. Within 2 weeks of dimerizer administration, FAT-ATTAC mice show near-knockout levels of circulating adipokines and markedly reduced levels of adipose tissue. FAT-ATTAC mice are glucose intolerant, have diminished basal and endotoxin-stimulated systemic inflammation, are less responsive to glucose-stimulated insulin secretion and show increased food intake independent of the effects of leptin. Most importantly, we show that functional adipocytes can be recovered upon cessation of treatment, allowing the study of adipogenesis
in vivo
, as well as a detailed examination of the importance of the adipocyte in the regulation of multiple physiological functions and pathological states.
Publisher
Nature Publishing Group US,Nature Publishing Group
Subject
/ Adipose Tissue - drug effects
/ Animals
/ Biomedical and Life Sciences
/ Body fat
/ Eating
/ Glucose Intolerance - genetics
/ Lipids
/ Medicine
/ Mice
/ Proteins
/ Recombinant Fusion Proteins - genetics
/ Recombinant Fusion Proteins - metabolism
/ Tacrolimus - analogs & derivatives
/ Tacrolimus Binding Proteins - genetics
