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Background and objective Osteoarthritis (OA) is influenced by genetics and environmental factors, including vitamin D deficiency. This study aimed to investigate the association between vitamin D levels, growth/differentiation factor 5 (GDF-5) gene polymorphism, and serum GDF-5 in obese females with knee OA (KOA) in Saudi Arabia. Methodology The study enrolled 60 female patients with OA and 60 healthy females as controls. Blood samples were collected to evaluate the GDF-5 T>C (rs143383) polymorphism using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). The study also measured serum levels of vitamin D, GDF-5, calcium, uric acid, lipid profiles, C-reactive protein (CRP), and erythrocyte sedimentation rate (ESR), and assessed the participants' BMI. Results The study demonstrated that KOA patients had reduced vitamin D levels in their bodies, along with GDF-5 and calcium. However, they had increased levels of uric acid, lipid profile, CRP, and ESR. Strong correlations were observed between vitamin D levels, lipid profile, CRP, ESR, BMI, GDF-5 gene polymorphisms, and GDF-5 protein. Genotype analysis showed KOA patients had TT (30%), TC (50%), and CC (20%) genotypes, while the control group showed TT (22%), TC (35%), and CC (43%) genotypes. Allele analysis revealed a noteworthy association between the T allele and KOA; the C allele was more common in the control group. Conclusions The study findings provide valuable insights into the association of vitamin D levels with GDF-5 T>C (rs143383) polymorphism, GDF-5 protein, and inflammatory markers in obese Saudi females with KOA. These findings suggest potential associations between these biomarkers and the pathogenesis or progression of KOA.
RESUMO
BACKGROUND: Cardiovascular disease signifies a major cause of morbidity and mortality among patients with type 2 diabetes mellitus (T2DM). Serum uric acid (SUA) levels are elevated during the initial phases of impaired glucose metabolism. This work was designed to explore the association between SUA levels, serum oxido-inflammatory biomarkers, and the risk of coronary artery disease (CAD) in T2DM patients as the primary outcome. The secondary outcome was to assess the prognostic role of SUA in the prediction of the risk of CAD in T2DM patients. METHODS: In this case-control study, we enrolled 110 patients with T2DM who were further divided into patients with CAD and without CAD. In addition, 55 control participants were stringently matched to cases by age. RESULTS: Diabetic patients with CAD had significantly higher serum levels of the inflammatory biomarkers and the oxidative malondialdehyde but significantly lower levels of serum total antioxidant capacity (TAC) compared with the controls and diabetic patients without CAD. Significant positive correlations existed between SUA levels and serum levels of the inflammatory biomarkers and malondialdehyde, while a significant negative correlation existed between SUA levels and serum TAC. SUA demonstrated an accepted discrimination ability. SUA can differentiate between T2DM patients with CAD and patients without CAD, an area under the curve of 0.759. CONCLUSIONS: Elevated serum levels of SUA and oxido-inflammatory biomarkers are associated with an increased risk of CAD in T2DM. SUA levels reflect the body's inflammatory status and oxidant injury in T2DM. SUA could be utilized as a simple biomarker in the prediction of CAD risk in T2DM.
