Abstract:
:Circular RNAs (circRNA) are a class of covalently closed single-stranded RNAs that have been implicated in cancer progression. Here we identify circNDUFB2 to be downregulated in non-small cell lung cancer (NSCLC) tissues, and to negatively correlate with NSCLC malignant features. Elevated circNDUFB2 inhibits growth and metastasis of NSCLC cells. Mechanistically, circNDUFB2 functions as a scaffold to enhance the interaction between TRIM25 and IGF2BPs, a positive regulator of tumor progression and metastasis. This TRIM25/circNDUFB2/IGF2BPs ternary complex facilitates ubiquitination and degradation of IGF2BPs, with this effect enhanced by N6-methyladenosine (m6A) modification of circNDUFB2. Moreover, circNDUFB2 is also recognized by RIG-I to activate RIG-I-MAVS signaling cascades and recruit immune cells into the tumor microenvironment (TME). Our data thus provide evidences that circNDUFB2 participates in the degradation of IGF2BPs and activation of anti-tumor immunity during NSCLC progression via the modulation of both protein ubiquitination and degradation, as well as cellular immune responses.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Li B,Zhu L,Lu C,Wang C,Wang H,Jin H,Ma X,Cheng Z,Yu C,Wang S,Zuo Q,Zhou Y,Wang J,Yang C,Lv Y,Jiang L,Qin Wdoi
10.1038/s41467-020-20527-zsubject
Has Abstractpub_date
2021-01-12 00:00:00pages
295issue
1issn
2041-1723pii
10.1038/s41467-020-20527-zjournal_volume
12pub_type
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