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- W4385765095 abstract "Abstract Background: To determine KRAS gene in circulating tumor DNA in comparison with histological grading through liquid biopsy in colorectal cancer patients. Methods: This dual-centered cross-sectional study included 73 diagnosed patients of colorectal cancer at different grading levels [Grade I, well differentiated (n = 7, 9.5%); Grade II, moderately differentiated (n = 14,18.9%); and Grade III, poorly differentiated (n = 52, 70%)]. Blood was collected, and plasma was separated. ctDNA was extracted, using magnetic bead-based technique (MagMAX Cell-Free DNA kit). KRAS gene was quantified through qPCR. STRING database was used to find KRAS interactomes. Results: Mean threshold cycle (CT value) of KRAS gene in Grade III samples showed significantly higher ( P = 0.001) levels of ctDNA (2.7 ± 1.14) compared with Grade II and Grade I (3.1 ± 0.68, 2.3 ± 0.60), respectively. Grading characterization showed that rectal cancer (n = 22, 42.3%) with Grade III (68.8%) was more prevalent than colon and sigmoid cancer (n = 19, 36.5%, n = 11, 21%, respectively). STRING database showed 10 functional genes interacting with KRAS expressed as gene/proteins. Conclusion: Liquid biopsy can be used to detect ctDNA in plasma of CRC patients and enabled to detect the KRAS gene by qPCR. The technique being less invasive and cost-effective is convenient for multiple biopsies in different cancers." @default.
- W4385765095 created "2023-08-12" @default.
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- W4385765095 date "2023-08-08" @default.
- W4385765095 modified "2023-09-25" @default.
- W4385765095 title "Comparison of KRAS gene in circulating tumor DNA levels vs histological grading of colorectal cancer patients through liquid biopsy" @default.
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- W4385765095 doi "https://doi.org/10.4103/sjg.sjg_85_23" @default.
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