PuSH - Publikationsserver des Helmholtz Zentrums München

Koçberber, Z.* ; Willemsen, N.* ; Bartelt, A.

The role of proteasome activators PA28αβ and PA200 in brown adipocyte differentiation and function.

Front. Endocrin. 14:1176733 (2023)
Verlagsversion DOI PMC
Open Access Gold
Creative Commons Lizenzvertrag
INTRODUCTION: Brown adipocytes produce heat through non shivering thermogenesis (NST). To adapt to temperature cues, they possess a remarkably dynamic metabolism and undergo substantial cellular remodeling. The proteasome plays a central role in proteostasis and adaptive proteasome activity is required for sustained NST. Proteasome activators (PAs) are a class of proteasome regulators but the role of PAs in brown adipocytes is unknown. Here, we studied the roles of PA28α (encoded by Psme1) and PA200 (encoded by Psme4) in brown adipocyte differentiation and function. METHODS: We measured gene expression in mouse brown adipose tissue. In cultured brown adipocytes, we silenced Psme1 and/or Psme4 expression through siRNA transfection. We then assessed impact on the ubiquitin proteasome system, brown adipocyte differentiation and function. RESULTS: We found that Psme1 and Psme4 are expressed in brown adipocytes in vivo and in vitro. Through silencing of Psme1 and/or Psme4 expression in cultured brown adipocytes, we found that loss of PAs did not impair proteasome assembly or activity, and that PAs were not required for proteostasis in this model. Loss of Psme1 and/or Psme4 did not impair brown adipocyte development or activation, suggesting that PAs are neither required for brown adipogenesis nor NST. DISCUSSION: In summary, we found no role for Psme1 and Psme4 in brown adipocyte proteostasis, differentiation, or function. These findings contribute to our basic understanding of proteasome biology and the roles of proteasome activators in brown adipocytes.
Altmetric
Weitere Metriken?
[➜Einloggen]
Zusatzinfos bearbeiten [➜Einloggen]
Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Korrespondenzautor
Schlagwörter Bat ; Pa200 ; Pa28αβ ; Psme1 ; Psme4 ; Brown Adipocytes ; Proteostasis ; Ubiquitin-proteasome-system; Adipose-tissue; Immunoproteasome; Stress; Nrf1
ISSN (print) / ISBN 1664-2392
e-ISSN 1664-2392
Zeitschrift Frontiers in Endocrinology
Quellenangaben Band: 14, Heft: , Seiten: , Artikelnummer: 1176733 Supplement: ,
Verlag Frontiers
Verlagsort Lausanne
Nichtpatentliteratur Publikationen
Begutachtungsstatus Peer reviewed
Institut(e) Institute of Diabetes and Cancer (IDC)
Förderungen European Research Council
Deutsches Zentrum fuer Herz-Kreislauf-Forschung Junior Research Group Grant
Deutsche Forschungsgemeinschaft Sonderforschungsbereich
DAAD scholarship