Sirtuin3 and Sirtuin7 are promising biomarkers in systemic sclerosis.

Background: Systemic sclerosis (SSc) is an autoimmune disease that results in micro-vasculopathy, leading to organ dysfunction. Sirtuins are known for their role in cellular processes such as the cell cycle, aging, and inflammation, Sirtuins also play an important role in regulating fibrotic responses, inhibiting collagen production and myofibroblast differentiation, implying that its dysregulation is involved in the pathogenesis of systemic sclerosis. The aim of this study was to determine the circulating Sirtuin3 and Sirtuin7 levels in patients suffering from systemic sclerosis with a focus on how they might be associated with the different clinical features and subsets of the disease. Methods: This prospective cross-sectional case–control study included 56 participants 41 SSc patients and 15 healthy controls. Demographics, clinical, and laboratory data were analyzed. Quantitative determination of human Sirtuin3 and Sirtuin7 concentrations was done. Results: Among systemic sclerosis patients, the age of SSc patients was 42.27 ± 10.46 years. The mean serum levels of Sirtuin3 and Sirtuin7 were significantly lower in SSc patients than in healthy controls (p < 0.001). SIRT3 and SIRT7 levels among SSc patients showed a statistically significant positive correlation (p < 0.001). SIRT7 level was insignificantly decreased in dcSSc (14.16 ± 5.93) than in lcSSc (20.01 ± 8.34). Regarding the SIRT3 level, there was an insignificant difference between dcSSc and lcSSc. Modified Rodnan's skin score correlated negatively with Sirtuin3 and Sirtuin7 levels. In systemic sclerosis patients with interstitial lung disease (56.1%), there was an insignificant difference in SIRT3 and SIRT7 levels (0.12 ± 0.01and 21.23 ± 8.23) compared with systemic sclerosis patients without interstitial lung disease (0.10 ± 0.01 and 17.47 ± 8.57), with p = 0.408 and 0.258, respectively. The receiver operating characteristic curve for SSc prediction with Sirtuin3 has an accuracy of 83.0%, sensitivity of 85.4%, and specificity of 80.0% and p < 0.001. Regarding Sirtuin7, it has an accuracy of 89.5%, sensitivity of 85.4%, and specificity of 93.3% and p < 0.001. Conclusion: Sirtuin3 and Sirtuin7 levels were found to have a significant positive correlation in SSc patients. Sirtuin3 and Sirtuin7 levels are both good diagnostic biomarkers for detecting and diagnosing SSc, with Sirtuin7 being more accurate, specific, and predictive of the disease than Sirtuin3. Sirtuin7 is thought to be a new biomarker for SSc disease. [ABSTRACT FROM AUTHOR]