Association between single nucleotide variants and severe chronic pain in older adult patients after lower extremity arthroplasty

Author:

Xu Rui1,Jin Yinan1,Tang Suhong1,Wang Wenwen2,Sun Yu-E1,Liu Yue1,Zhang Wei1,Hou Bailing1,Huang Yulin1,Ma Zhengliang1

Affiliation:

1. Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School

2. Nanjing Drum Tower Hospital Clinical College of Nanjing Medical University

Abstract

Abstract Background Hip or knee osteoarthritis (OA) is one of the main causes of disability worldwide and occurs mostly in the older adults. Total hip or knee arthroplasty is the most effective method to treat OA. However, severe postsurgical pain leading to a poor prognosis. So, investigating the population genetics and genes related to severe chronic pain in older adult patients after lower extremity arthroplasty is helpful to improve the quality of treatment. Methods We collected blood samples from elderly patients who underwent lower extremity arthroplasty from September 2020 to February 2021 at the Drum Tower Hospital Affiliated to Nanjing University Medical School. The enrolled patients provided measures of pain intensity using the numerical rating scale on the 90th day after surgery. Patients were divided into the case group (Group A) and the control group (Group B) including 10 patients respectively by the numerical rating scale. DNA was isolated from the blood samples of the two groups for whole-exome sequencing. Results In total, 661 variants were identified in the 507 gene regions that were significantly different between both groups (P < 0.05), including CASP5, RASGEF1A, CYP4B1, etc. These genes are mainly involved in biological processes, including cell–cell adhesion, ECM–receptor interaction, metabolism, secretion of bioactive substances, ion binding and transport, regulation of DNA methylation, and chromatin assembly. Conclusions The current study shows some variants within genes are significantly associated with severe postsurgical chronic pain in older adult patients after lower extremity arthroplasty, indicating a genetic predisposition for chronic postsurgical pain. The study was registered according to ICMJE guidelines. The trial registration number is ChiCTR2000031655 and registration date is April 6th, 2020.

Publisher

Research Square Platform LLC

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