Abstract:
:Cancer-related cachexia is a metabolic syndrome characterized by a wasting disorder of adipose and skeletal muscle and is accompanied by body weight loss and systemic inflammation. The treatment options for cancer cachexia are limited, and the molecular mechanism remains poorly understood. Circular RNAs (circRNAs) are a novel family of endogenous noncoding RNAs that have been proposed to regulate gene expression in mammals. Exosomes are small vesicles derived from cells, and recent studies have shown that circRNAs are stable in exosomes. However, little is known about the biological role of circRNAs in exosomes. In our study, we showed that circRNAs in plasma exosomes have specific expression features in gastric cancer (GC), and ciRS-133 is linked with the browning of white adipose tissue (WAT) in GC patients. Exosomes derived from GC cells deliver ciRS-133 into preadipocytes, promoting the differentiation of preadipocytes into brown-like cells by activating PRDM16 and suppressing miR-133. Moreover, knockdown of ciRS-133 reduced cancer cachexia in tumor-implanted mice, decreasing oxygen consumption and heat production. Thus, exosome-delivered circRNAs are involved in WAT browning and play a key role in cancer-associated cachexia.
journal_name
Int J Cancerjournal_title
International journal of cancerauthors
Zhang H,Zhu L,Bai M,Liu Y,Zhan Y,Deng T,Yang H,Sun W,Wang X,Zhu K,Fan Q,Li J,Ying G,Ba Ydoi
10.1002/ijc.31977subject
Has Abstractpub_date
2019-05-15 00:00:00pages
2501-2515issue
10eissn
0020-7136issn
1097-0215journal_volume
144pub_type
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