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HOTAIR Induces the Downregulation of miR-200 Family Members in Gastric Cancer Cell Lines

BACKGROUND: Gastric cancer is the fourth most common human malignancy and the second reason for cancer morbidity worldwide. LncRNA HOTAIR has recently emerged as a promoter of metastasis in various cancer types, including GC, through the EMT process. However, the exact mechanism of HOTAIR in promoti...

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Detalles Bibliográficos
Autores principales: Bossaghzadeh, Fatemeh, Hajjari, Mohammadreza, Sheikhi, Abdolkarim, Salahshourifar, Iman, Irani, Shiva
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Pasteur Institute of Iran 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8784900/
https://www.ncbi.nlm.nih.gov/pubmed/34923813
http://dx.doi.org/10.52547/ibj.26.1.77
Descripción
Sumario:BACKGROUND: Gastric cancer is the fourth most common human malignancy and the second reason for cancer morbidity worldwide. LncRNA HOTAIR has recently emerged as a promoter of metastasis in various cancer types, including GC, through the EMT process. However, the exact mechanism of HOTAIR in promoting EMT is unknown. Aberrant expression of the miR-200 family has been linked to the occurrence and development of various types of malignant tumors. This study investigates the correlation between the HOTAIR and miR-200 family gene expression patterns in GC cell lines. We investigated the miR-200 and HOTAIR due to their common molecular features in the EMT process. METHODS: AGS and MKN45 cell lines were transfected with si-HOTAIR, along with a negative control. The effect of HOTAIR knockdown was also analyzed on cell viability and also on the expression of miR-200 family members, including miR-200a, -200b, and -200c, in cell lines using qRT-PCR. Statistical analysis was performed to find the potential correlation between the expression level of HOTAIR and miRs. RESULTS: Our results showed significant increased miR-200 family expression level in transfected AGS and MKN45 GC cells (fold changes > 2; p < 0.001). Moreover, a negative correlation was observed between HOTAIR and miR-200 expression levels in GC cell lines (p < 0.05). CONCLUSION: Our findings showed a significant association between miR-200 family and HOTAIR expression levels in GC cell lines. Taken together, the HOTAIR-miR-200 axis seems to play a vital role in human GC, suggesting a potential therapeutic target in future GC treatment.