Nitric oxide synthase 2 genetic variation rs2297514 associates with a decreased susceptibility to extremity post-traumatic osteomyelitis in a Chinese Han population

Chen-Sheng Song; Ping Zhang; Qing-Rong Lin; Ying-Yu Hu; Chun-Qiu Pan; Nan Jiang; Yan-Jun Hu

doi:10.3389/fcimb.2023.1177830

Nitric oxide synthase 2 genetic variation rs2297514 associates with a decreased susceptibility to extremity post-traumatic osteomyelitis in a Chinese Han population

Front Cell Infect Microbiol. 2023 Jul 3:13:1177830. doi: 10.3389/fcimb.2023.1177830. eCollection 2023.

Authors

Chen-Sheng Song^{1

2}, Ping Zhang¹, Qing-Rong Lin¹, Ying-Yu Hu^{1

3}, Chun-Qiu Pan⁴, Nan Jiang^{1

2}, Yan-Jun Hu¹

Affiliations

¹ Division of Orthopaedics and Traumatology, Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, China.
² Guangdong Provincial Key Laboratory of Bone and Cartilage Regenerative Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China.
³ Department of Hospital Management, Southern Medical University, Guangzhou, China.
⁴ Department of Emergency Trauma Center, Nanfang Hospital, Southern Medical University, Guangzhou, China.

Abstract

Background: Previous studies have indicated that nitric oxide synthase 2 (NOS2) genetic variations are involved in delayed fracture healing and fracture non-union. Whether these genetic variants associate with the development of osteomyelitis (OM) remains unclear. Here, we analyzed the potential relationships between NOS2 genetic variations and the risk of developing post-traumatic OM (PTOM) in a Chinese Han population.

Methods: Altogether 704 participants, including 336 PTOM patients and 368 healthy controls, were genotyped of rs2297514 and rs2248814 of the NOS2 gene using the SNaPshot genotyping method.

Results: Outcomes showed that the frequency of allele C of rs2297514 in the patient group was significantly lower than that in the control group (48.7% vs. 54.5%, P = 0.029, OR = 0.792, 95% CI 0.642 - 0.976). In addition, significant associations were found between rs2297514 and susceptibility to PTOM by the recessive model (P = 0.007, OR = 0.633, 95% CI 0.453 - 0.884), and the homozygous model (P = 0.039, OR = 0.648, 95% CI 0.429 - 0.979). Moreover, patients with the CC genotype of rs2297514 had lower inflammatory biomarkers levels than the TT genotype, especially for the C-reactive protein (CRP) level (median: 4.1 mg/L vs. 8.9 mg/L, P = 0.027). However, no significant relationship was noted between rs2248814 and the risk of developing PTOM.

Conclusion: In this Chinese cohort, rs2297514 is correlated with a decreased risk of PTOM development, with genotype CC as a protective factor.

Keywords: Nos2; case-control study; fracture-related infection; post-traumatic osteomyelitis; rs2297514; single nucleotide polymorphisms.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Case-Control Studies
China
East Asian People
Extremities
Genetic Predisposition to Disease*
Genotype
Humans
Nitric Oxide Synthase Type II* / genetics
Osteomyelitis* / genetics
Polymorphism, Single Nucleotide

Substances

Nitric Oxide Synthase Type II
NOS2 protein, human

Grants and funding

This research was funded by Guangdong Provincial Science and Technology Project, grant number: 2020A0505100039, Guangzhou Science and Technology Project, grant number 202002020001, and Xinjiang Uygur Autonomous Region Science and Technology Support Project, grant number: 2022E02040.