ArticleSaudi journal of gastroenterology : official journal of the Saudi Gastroenterology Association
Comparison of KRAS gene in circulating tumor DNA levels vs histological grading of colorectal cancer patients through liquid biopsy.
Article in Saudi journal of gastroenterology : official journal of the Saudi Gastroenterology Association. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
3 citing papers in PubMed, 3 citations in OpenAlex.
- Liquid biopsy in gastrointestinal oncology: clinical applications and translational integration of ctDNA, CTCs, and sEVs.Oncology reviews · 2025Review
- Liquid biopsy: Comprehensive overview of circulating tumor DNA (Review).Oncology letters · 2024Review
- The role of superior hemorrhoidal vein ectasia in the preoperative staging of rectal cancer.Frontiers in oncology · 2024Article
Corrections and comments
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Authors and funding
5 authors at 1 institution in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
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.
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