Mirtronic miR-4646-5p promotes gastric cancer metastasis by regulating ABHD16A and metabolite lysophosphatidylserines

The aberrant classical miRNAs are considered to play significant roles in tumor progression. However, it remains unclear for nonclassical miRNAs, a set of Drosha-independent miRNAs in the process of various biology. Here, we reveal that a nonclassical miR-4646-5p plays a pivotal role in gastric canc...

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Veröffentlicht in:Cell death and differentiation 2021-09, Vol.28 (9), p.2708-2727
Hauptverfasser: Yang, Liping, Hou, Yixuan, Du, Yan-e, Li, Qiao, Zhou, Fanlin, Li, Yu, Zeng, Huan, Jin, Ting, Wan, Xueying, Guan, Shengdong, Wang, Rui, Liu, Manran
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container_end_page 2727
container_issue 9
container_start_page 2708
container_title Cell death and differentiation
container_volume 28
creator Yang, Liping
Hou, Yixuan
Du, Yan-e
Li, Qiao
Zhou, Fanlin
Li, Yu
Zeng, Huan
Jin, Ting
Wan, Xueying
Guan, Shengdong
Wang, Rui
Liu, Manran
description The aberrant classical miRNAs are considered to play significant roles in tumor progression. However, it remains unclear for nonclassical miRNAs, a set of Drosha-independent miRNAs in the process of various biology. Here, we reveal that a nonclassical miR-4646-5p plays a pivotal role in gastric cancer (GC) metastasis. MiR-4646-5p, one of Drosha-independent mirtronic miRNA, is aberrant up-regulated in Drosha-low expressed GC and Drosha-knockdown gastric cancer cells. Mirtronic miR-4646-5p is a specific transcription splicing product of intron 3 of the host gene Abhd16a with the aid of SRSF2. The enhanced miR-4646-5p can stabilize HIF1A by targeting PHD3 to positive feedback regulate Abhd16a and miR-4646-5p itself expressions. ABHD16A, as an emerging phosphatidylserine-specific lipase, involves in lipid metabolism leading to lysophosphatidylserines (lyso-PSs) accumulation, which stimulates RhoA and downstream LIMK/cofilin cascade activity through GPR34/Gi subunit, thus causes metastasis of gastric cancer. In addition, miR-4646-5p/PHD3/HIF1A signaling can also up-regulate RhoA expression and synergistically promote gastric cancer cell invasion and metastasis. Our study provides new insights of nonclassical mirtronic miRNA on tumor progress and may serve as a new diagnostic biomarker for gastric cancer. MiR-4646-5p and its host gene Abhd16a mediated abnormal lipid metabolism may be a new target for clinical treatment of gastric cancer.
doi_str_mv 10.1038/s41418-021-00779-y
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However, it remains unclear for nonclassical miRNAs, a set of Drosha-independent miRNAs in the process of various biology. Here, we reveal that a nonclassical miR-4646-5p plays a pivotal role in gastric cancer (GC) metastasis. MiR-4646-5p, one of Drosha-independent mirtronic miRNA, is aberrant up-regulated in Drosha-low expressed GC and Drosha-knockdown gastric cancer cells. Mirtronic miR-4646-5p is a specific transcription splicing product of intron 3 of the host gene Abhd16a with the aid of SRSF2. The enhanced miR-4646-5p can stabilize HIF1A by targeting PHD3 to positive feedback regulate Abhd16a and miR-4646-5p itself expressions. ABHD16A, as an emerging phosphatidylserine-specific lipase, involves in lipid metabolism leading to lysophosphatidylserines (lyso-PSs) accumulation, which stimulates RhoA and downstream LIMK/cofilin cascade activity through GPR34/Gi subunit, thus causes metastasis of gastric cancer. In addition, miR-4646-5p/PHD3/HIF1A signaling can also up-regulate RhoA expression and synergistically promote gastric cancer cell invasion and metastasis. Our study provides new insights of nonclassical mirtronic miRNA on tumor progress and may serve as a new diagnostic biomarker for gastric cancer. 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subjects 13/1
13/105
13/51
13/89
13/95
14
38
38/61
38/77
42
45
45/15
59
631/45/320
631/67/322
64
82
Animals
Apoptosis
Biochemistry
Biomedical and Life Sciences
Cell Biology
Cell Cycle Analysis
Chromosome 5
Cofilin
Gastric cancer
Humans
Life Sciences
Lipid metabolism
Lysophospholipids - metabolism
Male
Metabolism
Metabolites
Metabolomics - methods
Metastases
Metastasis
Mice
Mice, Nude
miRNA
Monoacylglycerol Lipases - metabolism
Neoplasm Metastasis
Phosphatidylserine
RhoA protein
Stem Cells
Stomach Neoplasms - genetics
Stomach Neoplasms - pathology
Transcription
Transfection
title Mirtronic miR-4646-5p promotes gastric cancer metastasis by regulating ABHD16A and metabolite lysophosphatidylserines
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