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JCI table of contents: Dec. 3, 2007
Date:12/3/2007

the origin of the fat cell

A recent study in the Journal of Clinical Investigation indicated that in mice, under certain circumstances (either a high-fat diet or treatment with the antidiabetic drug rosiglitazone), cells derived from the bone marrow known as BMDCPCs can act as precursors of fat cells (adipocytes). However, a new study in mice by Gou Young Koh and colleagues at the Korea Advanced Institute of Science and Technology, Republic of Korea, suggests that this is not the case. The potential reasons for these distinct observations, as well as the impact of the observation that BMDCPCs cannot become adipocytes in vivo, are discussed in an accompanying commentary by David Scadden from Massachusetts General Hospital Center for Regenerative Medicine, Boston.

In the study, mouse bone marrow cells expressing a fluorescent marker were transplanted into normal mice and the fat tissue of the recipient mice was analyzed for the presence or absence of marked cells 2 months later. No marked adipocytes were detected, even in mice fed a high-fat diet and in mice treated with rosiglitazone. Although marked cells that looked similar to adipocytes were observed in the fat tissues, further analysis indicated that these cells expressed no proteins characteristic of adipocytes. Instead, the marked cells expressed proteins characteristic of cells known as macrophages. The authors therefore concluded that BMDCPCs do not become adipocytes in vivo.

TITLE: Bone marrowderived circulating progenitor cells fail to transdifferentiate into adipocytes in adult adipose tissues in mice

AUTHOR CONTACT:
Gou Young Koh
Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea.
Phone: 82-42-869-2638; Fax 82-42-869-2610; E-mail: gykoh@kaist.ac.kr.

View the PDF of this article at: https://www.the-jci.org/article.php?id=3
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Contact: Karen Honey
press_releases@the-jci.org
215-573-1850
Journal of Clinical Investigation
Source:Eurekalert

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