Background: To study the expression levels and clinical significance of Argonaute2 (EIF2C2) on colonic carcinomas and normal tissues.
Methods: Colon tissue samples from 90 cases of colonic carcinomas and 90 normal subjects were accumulated and made into a tissue microarray containing 360 dots. Expression of Argonaute2 (EIF2C2) was detected by immunohistochemical staining of the tissue microarray.
Results: There was significant difference in the expression levels of Argonaute2 (EIF2C2) between colonic carcinomas and normal tissues (P<0.01). However, the expression of Argonaute2 (EIF2C2) was not related to sex, age, position, differentiation, lymphatic metastasis and clinical stage of the tumor (P>0.05).
Conclusion: Abnormal expression of Argonaute2 (EIF2C2) may be correlated with colon tumorigenesis.
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BMC Cancer
July 2019
Discipline of Surgery, School of Medicine, Lambe institute for Translational Research, National University of Ireland, Galway, Ireland.
Background: Argonaute-2 (Ago2) is an essential component of microRNA biogenesis implicated in tumourigenesis. However Ago2 expression and localisation in breast cancer remains undetermined. The aim was to define Ago2 expression (mRNA and protein) and localisation in breast cancer, and investigate associations with clinicopathological details.
View Article and Find Full Text PDFBr J Cancer
December 2013
Institute of Pathology, University of Regensburg, Regensburg, Germany.
Background: Processing of microRNAs (miRNAs) is a highly controlled process. Deregulation of miRNA expression was observed in several types of cancer but changes in the miRNA-processing enzymes have not been analysed until today. In this study, we analysed Argonaute2 (AGO2, EIF2C2), as one main factor of the miRNA processing ensemble, in the context of cancer development, especially in melanoma.
View Article and Find Full Text PDFInt J Clin Exp Pathol
August 2013
Department of Gastroenterology, Tongji University Shanghai, China.
Background: To study the expression levels and clinical significance of Argonaute2 (EIF2C2) on colonic carcinomas and normal tissues.
Methods: Colon tissue samples from 90 cases of colonic carcinomas and 90 normal subjects were accumulated and made into a tissue microarray containing 360 dots. Expression of Argonaute2 (EIF2C2) was detected by immunohistochemical staining of the tissue microarray.
Proc Natl Acad Sci U S A
July 2008
Massachusetts General Hospital Cancer Center, Harvard Medical School, Charlestown, MA 02129-2020, USA.
RNAi is widely applied to inhibit expression of specific genes, but it is limited by variable efficiency and specificity of empirically designed siRNA or shRNA constructs. This complicates studies targeting individual genes and significantly impairs large-scale screens using genome-wide knockdown libraries. Here, we show that ectopic expression of the RISC slicer Argonaute-2 (Ago2, eIF2C2) dramatically enhances RNAi specifically for mRNA targets with perfectly matched binding sites.
View Article and Find Full Text PDFPLoS Genet
December 2007
Department of Human Genetics, Emory University School of Medicine, Atlanta, Georgia, United States of America.
Mammalian Argonaute proteins (EIF2C1-4) play an essential role in RNA-induced silencing. Here, we show that the loss of eIF2C2 (Argonaute2 or Ago2) results in gastrulation arrest, ectopic expression of Brachyury (T), and mesoderm expansion. We identify a genetic interaction between Ago2 and T, as Ago2 haploinsufficiency partially rescues the classic T/+ short-tail phenotype.
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