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Identification of Additional Body Weight QTLs in the Berlin Fat Mouse BFMI861 Lines Using Time Series Data

Overview
Journal Sci Rep
Specialty Science
Date 2024 Mar 15
PMID 38486030
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Abstract

The Berlin Fat Mouse Inbred line (BFMI) is a model for obesity and metabolic syndrome. The sublines BFMI861-S1 and BFMI861-S2 differ in weight despite high genetic similarity and a shared obesity-related locus. This study focused on identifying additional body weight quantitative trait loci (QTLs) by analyzing weekly weight measurements in a male population of the advanced intercross line BFMI861-S1 x BFMI861-S2. QTL analysis, utilizing 200 selectively genotyped mice (GigaMUGA) and 197 males genotyped for top SNPs, revealed a genome-wide significant QTL on Chr 15 (68.46 to 81.40 Mb) for body weight between weeks 9 to 20. Notably, this QTL disappeared (weeks 21 to 23) and reappeared (weeks 24 and 25) coinciding with a diet change. Additionally, a significant body weight QTL on Chr 16 (3.89 to 22.79 Mb) was identified from weeks 6 to 25. Candidate genes, including Gpt, Cbx6, Apol6, Apol8, Sun2 (Chr 15) and Trap1, Rrn3, Mapk1 (Chr 16), were prioritized. This study unveiled two additional body weight QTLs, one of which is novel and responsive to diet changes. These findings illuminate genomic regions influencing weight in BFMI and emphasize the utility of time series data in uncovering novel genetic factors.

References
1.
Krause F, Mohebian K, Delpero M, Hesse D, Kuhn R, Arends D . A deletion containing a CTCF-element in intron 8 of the Bbs7 gene is partially responsible for juvenile obesity in the Berlin Fat Mouse. Mamm Genome. 2021; 33(3):465-470. PMC: 9360062. DOI: 10.1007/s00335-021-09938-5. View

2.
Moorefield B, GREENE E, Reeder R . RNA polymerase I transcription factor Rrn3 is functionally conserved between yeast and human. Proc Natl Acad Sci U S A. 2000; 97(9):4724-9. PMC: 18300. DOI: 10.1073/pnas.080063997. View

3.
Simmonds M, Llewellyn A, Owen C, Woolacott N . Predicting adult obesity from childhood obesity: a systematic review and meta-analysis. Obes Rev. 2015; 17(2):95-107. DOI: 10.1111/obr.12334. View

4.
Delpero M, Arends D, Freiberg A, Brockmann G, Hesse D . QTL-mapping in the obese Berlin Fat Mouse identifies additional candidate genes for obesity and fatty liver disease. Sci Rep. 2022; 12(1):10471. PMC: 9213485. DOI: 10.1038/s41598-022-14316-5. View

5.
Lund M, Sorensen P, Madsen P, Jaffrezic F . Detection and modelling of time-dependent QTL in animal populations. Genet Sel Evol. 2008; 40(2):177-94. PMC: 2674924. DOI: 10.1186/1297-9686-40-2-177. View