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Modified Proline Metabolism and Prolidase Enzyme in COVID-19
Merve Ergin Tuncay1,2, Salim Neselioglu1,2, Emra Asfuroglu Kalkan3
1Department of Biochemistry, Yıldırım Beyazıt University Faculty of Medicine, Ankara, Turkey.
Objective:
The aim of the study was to evaluate proline metabolism in patients affected by COVID-19.
Materials And Methods:
This case-control study consisted of 116 patients with COVID-19 and 46 healthy individuals. Tests related to proline metabolism (prolidase, proline, hydroxyproline, glutamic acid, manganese) and copper and zinc tests were analyzed.
Results:
The levels of proline and hydroxyproline amino acids and the prolidase enzyme were found to be lower and glutamic acid was found to be higher in the COVID-19 group compared to the healthy group (P = .012, P < .001, P < .001, and P < .001, respectively). The copper/zinc ratio was higher in patients with COVID-19 than in healthy individuals (P < .001). Significant correlations were found between proline metabolism tests and inflammatory and hemostatic markers commonly used in COVID-19.
Conclusion:
The proline metabolic pathway was affected in COVID-19. Relationships between proline pathway-related tests and inflammatory/hemostatic markers supported the roles of proline metabolism in proinflammatory and immune response processes.
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