ArticleBMC cancer2024
MARCH1 negatively regulates TBK1-mTOR signaling pathway by ubiquitinating TBK1.
Article in BMC cancer, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- From energy metabolic homeostasis to immune remodeling: the role and therapeutic potential of STING signaling in the tumor microenvironment.Cell communication and signaling : CCS · 2026Review
- Integrative Transcriptomics Identifies Ubiquitination-Related GenesJournal of inflammation research · 2026Article
- Review
- MARCH1, transcriptionally regulated by POU2F2, facilitates acute myeloid leukemia progression via inducing MYCT1 degradation.Oncogene · 2025Article
- A genome-wide study on gene-nutrient interactions for hyperuricemia in a large Korean cohort (KoGES).Scientific reports · 2025Article
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12 authors.
Funding
Abstract
backgroundTBK1 positively regulates the growth factor-mediated mTOR signaling pathway by phosphorylating mTOR. However, it remains unclear how the TBK1-mTOR signaling pathway is regulated. Considering that STING not only interacts with TBK1 but also with MARCH1, we speculated that MARCH1 might regulate the mTOR signaling pathway by targeting TBK1. The aim of this study was to determine whether MARCH1 regulates the mTOR signaling pathway by targeting TBK1.
methodsThe co-immunoprecipitation (Co-IP) assay was used to verify the interaction between MARCH1 with STING or TBK1. The ubiquitination of STING or TBK1 was analyzed using denatured co-immunoprecipitation. The level of proteins detected in the co-immunoprecipitation or denatured co-immunoprecipitation samples were determined by Western blotting. Stable knocked-down cells were constructed by infecting lentivirus bearing the related shRNA sequences. Scratch wound healing and clonogenic cell survival assays were used to detect the migration and proliferation of breast cancer cells.
resultsWe showed that MARCH1 played an important role in growth factor-induced the TBK1- mTOR signaling pathway. MARCH1 overexpression attenuated the growth factor-induced activation of mTOR signaling pathway, whereas its deficiency resulted in the opposite effect. Mechanistically, MARCH1 interacted with and promoted the K63-linked ubiquitination of TBK1. This ubiquitination of TBK1 then attenuated its interaction with mTOR, thereby inhibiting the growth factor-induced mTOR signaling pathway. Importantly, faster proliferation induced by MARCH1 deficiency was weakened by mTOR, STING, or TBK1 inhibition.
conclusionMARCH1 suppressed growth factors mediated the mTOR signaling pathway by targeting the STING-TBK1-mTOR axis.
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