Genetic and functional characterization of clonally derived adult human brown adipocytes
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
Brown adipose tissue (BAT) acts in mammals as a natural defense system against hypothermia, and its activation to a state of increased energy expenditure is believed to protect against the development of obesity. Even though the existence of BAT in adult humans has been widely appreciated, its cellular origin and molecular identity remain elusive largely because of high cellular heterogeneity within various adipose tissue depots. To understand the nature of adult human brown adipocytes at single cell resolution, we isolated clonally derived adipocytes from stromal vascular fractions of adult human BAT from two individuals and globally analyzed their molecular signatures. We used RNA sequencing followed by unbiased genome-wide expression analyses and found that a population of uncoupling protein 1 (UCP1)-positive human adipocytes possessed molecular signatures resembling those of a recruitable form of thermogenic adipocytes (that is, beige adipocytes). In addition, we identified molecular markers that were highly enriched in UCP1-positive human adipocytes, a set that included potassium channel K3 (KCNK3) and mitochondrial tumor suppressor 1 (MTUS1). Further, we functionally characterized these two markers using a loss-of-function approach and found that KCNK3 and MTUS1 were required for beige adipocyte differentiation and thermogenic function. The results of this study present new opportunities for human BAT research, such as facilitating cell-based disease modeling and unbiased screens for thermogenic regulators.
Originalsprog | Engelsk |
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Tidsskrift | Nature Medicine |
Vol/bind | 21 |
Udgave nummer | 4 |
Sider (fra-til) | 389-394 |
Antal sider | 6 |
ISSN | 1078-8956 |
DOI | |
Status | Udgivet - 2015 |
Bibliografisk note
Funding Information:
We acknowledge support from the National Institutes of Health (NIH) (DK087853 and DK097441), the UCSF Diabetes Research Center grant (DK63720), the UCSF Program for Breakthrough Biomedical Research program, the Pew Charitable Trust, and the Japan Science and Technology Agency (all to S.K.); and from the NIH (P50-GM60338) and the American Dental Association (1-14-TS-35) (both to L.S.S.). K.S. is supported by a fellowship from the Japan Society for the Promotion of Science. Y.H. is supported by the Manpei Suzuki Diabetes Foundation. I.H.N.L. is supported by the Dutch Heart Foundation.
Publisher Copyright:
©2005 Nature America, Inc. All rights reserved.
ID: 375200024