tailieunhanh - báo cáo khoa học: "The clinical potential of microRNAs"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài:The clinical potential of microRNAs | Budhu et al. Journal of Hematology Oncology 2010 3 37 http content 3 1 37 JOURNAL OF HEMATOLOGY ONCOLOGY REVIEW Open Access The clinical potential of microRNAs Anuradha Budhu Junfang Ji Xin W Wang Abstract MicroRNAs are small noncoding RNAs that function to control gene expression. These small RNAs have been shown to contribute to the control of cell growth differentiation and apoptosis important features related to cancer development and progression. In fact recent studies have shown the utility of microRNAs as cancer-related biomarkers. This is due to the finding that microRNAs display altered expression profiles in cancers versus normal tissue. In addition microRNAs have been associated with cancer progression. In this review the mechanisms to alter microRNA expression and their relation to cancer will be addressed. Moreover the potential application of microRNAs in clinical settings will also be highlighted. Finally the challenges regarding the translation of research involving microRNAs to the clinical realm will be discussed. Review The Biogenesis and Physiological Functions of MicroRNAs MicroRNAs are a group of small noncoding functional RNAs that are approximately 22 nucleotides in length 1 . MicroRNAs are transcribed by RNA polymerase II or III as longer primary microRNAs termed pri-microRNA. This molecule is then modified in the nucleus through capping and polyadenylation and subsequently cleaved into smaller segments by Drosha an RNAseIII enzyme. This forms a hairpin precursor of approximately 60-70 nucleotides termed pre-microRNA which is exported to the cytoplasm and modified by another enzyme the RNAseII endonuclease Dicer to form a duplex of mature micro-RNA. One of the microRNA strands of the duplex is loaded onto the RNA-induced silencing complex RISC where it is then able to either cleave RNA targets or repress protein translation dependent upon its complementarity to the target mRNA. Through their binding to target mRNA .

TÀI LIỆU LIÊN QUAN
crossorigin="anonymous">
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.