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Updated: Jul 27, 2025

Author Spotlight: Unveiling Transmembrane Protein Family-Related Markers in Gastric Cancer and Implications for Targeted Therapies
Published on: September 15, 2023
Long noncoding RNA TMEM147-AS1 serves as a microRNA-326 sponge to aggravate the malignancy of gastric cancer by
Xufu Qin1, Ziye Jiang1, Yongcui Zhu1
1Second Department of Gastroenterology, Heilongjiang Provincial Hospital, Harbin, 150001, China.
Abstract:
The abnormal expression of long noncoding RNAs (lncRNAs) is frequently observed in gastric cancer (GC) and considered an important driving force in GC progression. However, little is known regarding the involvement of TMEM147-AS1 in GC. Therefore, we examined TMEM147-AS1 expression in GC and determined its prognostic value. In addition, TMEM147-AS1 expression was depleted to identify the functional changes in response to TMEM147-AS1 deficiency. Using the cancer genome atlas dataset and our own cohort, we identified a strong expression of TMEM147-AS1 in GC. Increased TMEM147-AS1 levels in GC showed a significant association with poor prognosis. TMEM147-AS1 interference resulted in the inhibition of GC cell proliferation, colony-forming, migration, and invasion in vitro. Additionally, depletion of TMEM147-AS1 restricted the growth of GC cells in vivo. Mechanistically, TMEM147-AS1 functioned as a microRNA-326 (miR-326) sponge. Furthermore, SMAD family member 5 (SMAD5) was experimentally validated as the functional effector of miR-326. TMEM147-AS1 was demonstrated to sequester miR-326 away from SMAD5; consequently, knocking down TMEM147-AS1 downregulated SMAD5 levels in GC cells. The functional suppression of miR-326 or reintroduction of SMAD5 effectively reversed the attenuated behavior of GC cells caused by TMEM147-AS1 downregulation. In summary, TMEM147-AS1 exhibits tumorigenic activities in GC, which is likely the result of an altered miR-326/SMAD5 axis. Therefore, targeting TMEM147-AS1/miR-326/SMAD5 may represent a target for the treatment of GC.
Insights
Long noncoding RNA TMEM147-AS1 promotes gastric cancer (GC) by sponging miR-326 and upregulating SMAD5. Targeting this axis may offer new GC treatment strategies.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Abnormal long noncoding RNA (lncRNA) expression is linked to gastric cancer (GC) progression.
- The specific role of TMEM147-AS1 in GC remains largely unexplored.
Purpose of the Study:
- To investigate the expression and prognostic value of TMEM147-AS1 in GC.
- To elucidate the functional role and molecular mechanism of TMEM147-AS1 in GC progression.
Main Methods:
- Analysis of TMEM147-AS1 expression in GC patient data (TCGA and local cohort).
- In vitro and in vivo experiments involving TMEM147-AS1 depletion in GC cells.
- Investigation of the interaction between TMEM147-AS1, miR-326, and SMAD5.
Main Results:
- TMEM147-AS1 is significantly upregulated in GC and associated with poor prognosis.
- TMEM147-AS1 depletion inhibits GC cell proliferation, migration, invasion, and tumor growth.
- TMEM147-AS1 acts as a molecular sponge for miR-326, leading to SMAD5 upregulation.
Conclusions:
- TMEM147-AS1 promotes GC tumorigenesis through the TMEM147-AS1/miR-326/SMAD5 axis.
- TMEM147-AS1 represents a potential therapeutic target for gastric cancer treatment.
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