| Home > Articles > Published articles > The splicing factor SF3B1 is involved in brown adipocyte thermogenic activation |
| Date: | 2024 |
| Abstract: | The ability of alternative splicing mechanisms to control gene expression is increasingly being recognized as relevant for adipose tissue function. The expression of SF3B1, a key component of the SF3B complex directly involved in spliceosome formation, was previously reported to be significantly induced in brown adipose tissue under cold-induced thermogenic activation. Here, we identify that noradrenergic cAMP-mediated thermogenic stimulation increases SF3B1 expression in brown and beige adipocytes. We further show that pladienolide-B, a drug that binds SF3B1 to inhibit pre-mRNA splicing by targeting the SF3B complex, down-regulates key components of the thermogenic machinery (e. g. , UCP1 gene expression), differentially alters the expression of alternative splicing-regulated transcripts encoding molecular actors involved in the oxidative metabolism of brown adipocytes (e. g. , peroxisome proliferator-activated receptor-gamma co-activator-alpha [PGC-1α] and cytochrome oxidase subunit 7a genes), and impairs the respiratory activity of brown adipocytes. Similar alterations were found in brown adipocytes with siRNA-mediated knockdown of SF3B1 protein levels. Our findings collectively indicate that SF3B1 is a key factor in the appropriate thermogenic activation of differentiated brown adipocytes. This work exemplifies the importance of splicing processes in adaptive thermogenesis and suggests that pharmacological tools, such as pladienolide-B, may be used to modulate brown adipocyte thermogenic activity. |
| Grants: | Ministerio de Ciencia, Innovación y Universidades PID2020-114112RB-100 Ministerio de Ciencia, Innovación y Universidades PRE2018-085231 Ministerio de Ciencia, Innovación y Universidades IJC2020-043380-I |
| Rights: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. |
| Language: | Anglès |
| Document: | Article ; recerca ; Versió publicada |
| Subject: | Brown adipose tissue ; Obesity ; Pladienolide-B ; SF3B1 ; Splicing |
| Published in: | Biochemical pharmacology, Vol. 220 (february 2024) , p. 116014, ISSN 1873-2968 |
11 p, 4.0 MB |