Nastaran Haghighi1, Abbas Doosti2, Jafar Kiani3. 1. Department of Genetics, Shahrekord Branch, Islamic Azad University, Shahrekord, Iran. 2. Biotechnology Research Center, Shahrekord Branch, Islamic Azad University, Shahrekord, Iran. dr.abbasdoosti@yahoo.com. 3. Department of Molecular Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences (IUMS), Tehran, Iran.
Abstract
AIM: Gastric cancer (GC) is one of the most common malignant tumors globally, with an increasing incidence rate. Nuclear paraspeckle assembly transcript 1 (NEAT1) is a long non-coding RNA (lncRNAs) responsible for regulating cell cycle progression, apoptosis, cell growth, proliferation, and migration in various cells. The present survey was performed to assess the effects of NEAT1 gene knocking out by CRISPR/Cas9 system in human gastric cancer cells. METHODS: The CRISPR/Cas9 genome editing technique was used to knockout NEAT1 in AGS cells as a gastric cancer model. After the design and construction of the vector, transfection was performed. The expression levels of mRNA, the survival of cells, apoptosis, and cell migration were evaluated by real-time quantitative polymerase chain reaction, flow cytometry, and scratch wound. RESULTS: Degradation of NEAT1 by CRISPR/cas9 significantly suppressed the gene's expression rate, arrested cell cycle in the G0/G1 phase, and a significant reduction in cell number in the S phase (P < 0.05). Degradation of NEAT1 by CRISPR/cas9 also restrained the ability to migrate in transfected cells compared to the control group (P < 0.01). Knockout of NEAT1 via impact on miR-34a gene expression induced apoptosis of AGS cells (P < 0.05) with increasing in the FAS level and total apoptosis (P < 0.001). CONCLUSIONS: Findings suggest that NEAT1 plays a vital role in cellular mechanisms of GC's occurrence and can serve as a new treatment target in GC.
AIM: Gastric cancer (GC) is one of the most common malignant tumors globally, with an increasing incidence rate. Nuclear paraspeckle assembly transcript 1 (NEAT1) is a long non-coding RNA (lncRNAs) responsible for regulating cell cycle progression, apoptosis, cell growth, proliferation, and migration in various cells. The present survey was performed to assess the effects of NEAT1 gene knocking out by CRISPR/Cas9 system in human gastric cancer cells. METHODS: The CRISPR/Cas9 genome editing technique was used to knockout NEAT1 in AGS cells as a gastric cancer model. After the design and construction of the vector, transfection was performed. The expression levels of mRNA, the survival of cells, apoptosis, and cell migration were evaluated by real-time quantitative polymerase chain reaction, flow cytometry, and scratch wound. RESULTS: Degradation of NEAT1 by CRISPR/cas9 significantly suppressed the gene's expression rate, arrested cell cycle in the G0/G1 phase, and a significant reduction in cell number in the S phase (P < 0.05). Degradation of NEAT1 by CRISPR/cas9 also restrained the ability to migrate in transfected cells compared to the control group (P < 0.01). Knockout of NEAT1 via impact on miR-34a gene expression induced apoptosis of AGS cells (P < 0.05) with increasing in the FAS level and total apoptosis (P < 0.001). CONCLUSIONS: Findings suggest that NEAT1 plays a vital role in cellular mechanisms of GC's occurrence and can serve as a new treatment target in GC.
Authors: Gamaleldin I Harisa; Abdelrahman Y Sherif; Abdullah M E Youssof; Fars K Alanazi; Mounir M Salem-Bekhit Journal: AAPS PharmSciTech Date: 2020-06-08 Impact factor: 3.246
Authors: Avni G Desai; Ghulam N Qazi; Ramesh K Ganju; Mahmoud El-Tamer; Jaswant Singh; Ajit K Saxena; Yashbir S Bedi; Subhash C Taneja; Hari K Bhat Journal: Curr Drug Metab Date: 2008-09 Impact factor: 3.731
Authors: Robert Sitarz; Małgorzata Skierucha; Jerzy Mielko; G Johan A Offerhaus; Ryszard Maciejewski; Wojciech P Polkowski Journal: Cancer Manag Res Date: 2018-02-07 Impact factor: 3.989