Murine neuronatin deficiency is associated with a hypervariable food intake and bimodal obesity
| Autor: | I. Sadaf Farooqi, Marcella Ma, Ilona Zvetkova, Brian Y.H. Lam, Irene Cimino, Luca Fagnocchi, Pierre Larraufie, Y. C. Loraine Tung, Giles S.H. Yeo, Debra Rimmington, J. Andrew Pospisilik, Frank Reimann, Richard G. Kay, Stephen O'Rahilly, Vladimir Saudek, Anthony P. Coll, Samuel Virtue, Fiona M. Gribble, Katherine Lawler, Antonio Vidal-Puig |
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| Přispěvatelé: | Wellcome Trust-MRC Institute of Metabolic Science, Physiologie de la Nutrition et du Comportement Alimentaire (PNCA (UMR 0914)), AgroParisTech-Université Paris-Saclay-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Van Andel Institute [Grand Rapids], Cimino, Irene [0000-0003-1397-5408], Farooqi, Ismaa [0000-0001-7609-3504], Gribble, Fiona [0000-0002-4232-2898], Reimann, Frank [0000-0001-9399-6377], Coll, Anthony [0000-0003-2594-7463], Apollo - University of Cambridge Repository |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Male
Molecular biology Physiology 631/208 Eating Mice 0302 clinical medicine Gene expression 631/443 2. Zero hunger Mice Knockout 0303 health sciences Multidisciplinary [SDV.MHEP.EM]Life Sciences [q-bio]/Human health and pathology/Endocrinology and metabolism Phenotype Null allele Medicine Female 631/378 631/337 medicine.medical_specialty Science Nerve Tissue Proteins Biology Diet High-Fat Article 03 medical and health sciences Internal medicine medicine Genetics Animals Obesity 030304 developmental biology Gene Expression Profiling Body Weight Wild type Membrane Proteins medicine.disease Sexual dimorphism Mice Inbred C57BL Endocrinology Neuronatin Genomic imprinting Energy Metabolism 030217 neurology & neurosurgery Biomarkers Neuroscience |
| Zdroj: | Scientific Reports Scientific Reports, Nature Publishing Group, 2021, 11 (1), pp.17571. ⟨10.1038/s41598-021-96278-8⟩ Scientific Reports, Vol 11, Iss 1, Pp 1-15 (2021) |
| ISSN: | 2045-2322 |
| DOI: | 10.1038/s41598-021-96278-8⟩ |
| Popis: | Neuronatin (Nnat) has previously been reported to be part of a network of imprinted genes downstream of the chromatin regulator Trim28. Disruption of Trim28 or of members of this network, including neuronatin, results in an unusual phenotype of a bimodal body weight. To better characterise this variability, we examined the key contributors to energy balance in Nnat+/−p mice that carry a paternal null allele and do not express Nnat. Consistent with our previous studies, Nnat deficient mice on chow diet displayed a bimodal body weight phenotype with more than 30% of Nnat+/−p mice developing obesity. In response to both a 45% high fat diet and exposure to thermoneutrality (30 °C) Nnat deficient mice maintained the hypervariable body weight phenotype. Within a calorimetry system, food intake in Nnat+/−p mice was hypervariable, with some mice consuming more than twice the intake seen in wild type littermates. A hyperphagic response was also seen in Nnat+/−p mice in a second, non-home cage environment. An expected correlation between body weight and energy expenditure was seen, but corrections for the effects of positive energy balance and body weight greatly diminished the effect of neuronatin deficiency on energy expenditure. Male and female Nnat+/−p mice displayed subtle distinctions in the degree of variance body weight phenotype and food intake and further sexual dimorphism was reflected in different patterns of hypothalamic gene expression in Nnat+/−p mice. Loss of the imprinted gene Nnat is associated with a highly variable food intake, with the impact of this phenotype varying between genetically identical individuals. |
| Databáze: | OpenAIRE |
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