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PLoS One. 2017 Apr 26;12(4):e0175524. doi: 10.1371/journal.pone.0175524. eCollection 2017.

BMT decreases HFD-induced weight gain associated with decreased preadipocyte number and insulin secretion.

Author information

1
Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands.
2
Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands.
3
Department of Medicine, division of Nephrology Leiden University Medical Center, Leiden, The Netherlands.
4
Department of Internal Medicine, Radboud UMC, Nijmegen, The Netherlands.
5
Department of Medicine, division of Endocrinology Leiden University Medical Center, Leiden, The Netherlands.

Abstract

Experimental bone marrow transplantation (BMT) in mice is commonly used to assess the role of immune cell-specific genes in various pathophysiological settings. The application of BMT in obesity research is hampered by the significant reduction in high-fat diet (HFD)-induced obesity. We set out to characterize metabolic tissues that may be affected by the BMT procedure and impair the HFD-induced response. Male C57BL/6 mice underwent syngeneic BMT using lethal irradiation. After a recovery period of 8 weeks they were fed a low-fat diet (LFD) or HFD for 16 weeks. HFD-induced obesity was reduced in mice after BMT as compared to HFD-fed control mice, characterized by both a reduced fat (-33%; p<0.01) and lean (-11%; p<0.01) mass, while food intake and energy expenditure were unaffected. As compared to control mice, BMT-treated mice had a reduced mature adipocyte volume (approx. -45%; p<0.05) and reduced numbers of preadipocytes (-38%; p<0.05) and macrophages (-62%; p<0.05) in subcutaneous, gonadal and visceral white adipose tissue. In BMT-treated mice, pancreas weight (-46%; p<0.01) was disproportionally decreased. This was associated with reduced plasma insulin (-68%; p<0.05) and C-peptide (-37%; p<0.01) levels and a delayed glucose clearance in BMT-treated mice on HFD as compared to control mice. In conclusion, the reduction in HFD-induced obesity after BMT in mice is at least partly due to alterations in the adipose tissue cell pool composition as well as to a decreased pancreatic secretion of the anabolic hormone insulin. These effects should be considered when interpreting results of experimental BMT in metabolic studies.

PMID:
28445487
PMCID:
PMC5406023
DOI:
10.1371/journal.pone.0175524
[Indexed for MEDLINE]
Free PMC Article

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