RESEARCH ON THE CHARACTERISTICS OF SEPT9 GEN METHYLATION IN SERUM BEFORE AND AFTER SURGERY IN STAGE III COLORECTAL CANCER

Thuỳ Linh Dương1, , Viết Hoành Hồ 1, Khánh Vân Nguyễn2, Hữu Thọ Hồ3, Văn Ba Nguyễn4
1 Trung tâm Ung bướu, Bệnh viện Quân y 103, Học viện Quân y
2 Cục Quân y, Tổng cục Hậu cần Kỹ thuật
3 Viện Nghiên cứu Y Dược học Quân sự, Học viện Quân y
4 Bệnh viện Quân y 175

Main Article Content

Abstract

Objective: To study the characteristics of SEPT9 gene methylation (mSEPT9) in peripheral blood before and after radical surgery in patients with stage III colorectal cancer (CRC). Methods: A cross-sectional descriptive study, with  follow-up of 50 stage III CRC patients treated at Military Hospital 103 and K Hospital from January 2021 to December 2024. Results: The percentage of positive mSEPT9 in plasma after surgery was 34% (17/50), significantly reduced compared to 84% (42/50) before surgery. ROC curve analysis showed that the value of distinguishing the progression status when combining positive mSEPT9 before and after surgery was good (AUC=0,755, p<0,05). Patients with positive mSEPT9 after surgery higher risk of progression compared to those with negative mSEPT9 after surgery (OR=7, p<0,05). Multivariate analysis indicated that mSEPT9 after surgery (HR: 10,738, p<0,05) is an independent predictive factor for significantly shorter PFS in stage III CRC patients with positive mSEPT9 after surgery. Conclusion: mSEPT9 has prognostic value and is useful for monitoring progression after radical surgery in stage III CRC patients.

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References

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