The Inflammatory Markers C-reactive Protein and Mean Platelet Volume in Chronic Kidney Disease

Background: People with chronic kidney disease (CKD) experience chronic systemic inflammation. Although a relationship exists between inflammation and renal injury, the association between inflammatory markers and renal disease has not been well-studied. As inflammation may be a trigger or a result of chronic disease, the kidney needs to be investigated to determine whether it is a clearer target for the devastating effects of persistent inflammation. Here, we report the relation of C-reactive protein and mean platelet volume levels with renal functions in chronic kidney disease patients.
Methods: This study was an observational retrospective single-center study conducted on the record of CKD patients to detect the outcomes over a median follow-up time of three years. Demographic, clinical, laboratory, medication, and outcome data were obtained from the electronic data records of the hospital. We investigated the multivariable association of plasma levels of C-reactive protein and mean platelet volume with the progression of CKD in the study participants.
Findings: Elevated plasma levels of C-reactive protein (r=0.13, P<0.001) and mean platelet volume (r=0.23, P<0.001) were associated with a greater loss of kidney function over time. The presence of diabetes mellitus was detected to be a risk factor for CKD progression (P=0.04). An inverse relationship was detected between sodium and creatinine (P<0.001). In addition, a weak association was detected between uric acid and creatinine (P<0.001). 
Conclusion: Elevated plasma levels of C-reactive protein and mean platelet volume were associated with a decline in the estimated glomerular filtration rate in patients with CKD.