Milad Asadi1,2, Dariush Shanehbandi2, Venus Zafari3, Vahid Khaze2, Mohammad Hosein Somi1, Shahriar Hashemzadeh4,5. 1. Research Centers for Liver and Gastrointestinal Disease, Tabriz University of Medical Sciences, Tabriz, Iran. 2. Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran. 3. Tuberculosis and Pulmonary Disease Research Center, Tabriz University of Medical Sciences, Tabriz, Iran. 4. Hematology and Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran. shahriar_90@yahoo.com. 5. Department of General and Vascular Surgery, Imam Reza Educational Hospital, School of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran. shahriar_90@yahoo.com.
Abstract
BACKGROUND: Aberrant expression of microRNAs (miRNAs) has been implicated in the etiopathogenesis and development of various cancers. Drosha and Dicer are the main components of the miRNA biosynthesis machine. Another enzyme, DGCR8, is the assistant of Drosha in the processing complex. Here, we tried to evaluate the mRNA transcript level of Drosha, Dicer, and DGCR8 genes in involved tissues from patients with gastric cancer. METHODS: Fifty tumoral and their marginal tissues, as the control group, were obtained from patients with gastric cancer. After RNA extraction from tissues and cDNA synthesis, quantification of mRNA expression of Drosha, Dicer, and DGCR8 was conducted using SYBR Green master mix and real-time PCR. RESULTS: It was observed that mRNA expression levels of Drosha, Dicer, and DGCR8 were significantly upregulated in tumoral tissues compared with marginal tissues. Upregulation of these genes was not correlated with clinical manifestations of the patients. CONCLUSIONS: Upregulation of Drosha, Dicer, and DGCR8 plays a role in the development of cancer, probably through dysregulated the expression level of miRNAs.
BACKGROUND: Aberrant expression of microRNAs (miRNAs) has been implicated in the etiopathogenesis and development of various cancers. Drosha and Dicer are the main components of the miRNA biosynthesis machine. Another enzyme, DGCR8, is the assistant of Drosha in the processing complex. Here, we tried to evaluate the mRNA transcript level of Drosha, Dicer, and DGCR8 genes in involved tissues from patients with gastric cancer. METHODS: Fifty tumoral and their marginal tissues, as the control group, were obtained from patients with gastric cancer. After RNA extraction from tissues and cDNA synthesis, quantification of mRNA expression of Drosha, Dicer, and DGCR8 was conducted using SYBR Green master mix and real-time PCR. RESULTS: It was observed that mRNA expression levels of Drosha, Dicer, and DGCR8 were significantly upregulated in tumoral tissues compared with marginal tissues. Upregulation of these genes was not correlated with clinical manifestations of the patients. CONCLUSIONS: Upregulation of Drosha, Dicer, and DGCR8 plays a role in the development of cancer, probably through dysregulated the expression level of miRNAs.
Authors: Michael Sand; Thilo Gambichler; Marina Skrygan; Daniel Sand; Nina Scola; Peter Altmeyer; Falk G Bechara Journal: Cancer Invest Date: 2010-07 Impact factor: 2.176
Authors: Stefano Volinia; George A Calin; Chang-Gong Liu; Stefan Ambs; Amelia Cimmino; Fabio Petrocca; Rosa Visone; Marilena Iorio; Claudia Roldo; Manuela Ferracin; Robyn L Prueitt; Nozumu Yanaihara; Giovanni Lanza; Aldo Scarpa; Andrea Vecchione; Massimo Negrini; Curtis C Harris; Carlo M Croce Journal: Proc Natl Acad Sci U S A Date: 2006-02-03 Impact factor: 11.205