Study on Proteinum in Clear Supernatant Liquid of Tongue Coating of Chronic Renal Failure Based on Protein Chip

This study aimed at screening proteinum markers of tongue coating related to chronic renal failure (CRF) and at establishing the predictive model by comparing differences of protein spectrum expression in clear supernatant liquid of tongue coating between CRF patients and normal controls in order to explore the significance of proteinum in clear supernatant liquid in the diagnosis of CRF. Clear supernatant liquid of tongue-coating samples collected from 67 CRF patients and 38 normal controls was used in the study. The proteinum markers of tongue coating were selected according to CRF with the SELDI-TOF-MS technique. The predictive model was established and verified by bioinformatics analysis. The tongue-coating samples of the 67 CRF patients and 38 normal samples in the control group were determined by the SELDI-TOF-MS technique. All 242 proteinum peaks were detected at 1000–20000 e/m. Overall, 13 distinct mass spectrum peaks were analyzed by bioinformatics and displayed statistical significance (P < 0.01). Seven distinct mass spectrum peaks, such as M/Z1092.68 and M/Z1508.26, show high expression in the CRF group. Six distinct mass spectrum peaks, such as M/Z13302.5 and M/Z14330.7, show low expression in the CRF group. Fuzzy-grouping algorithm was used in the fuzzy-grouping analysis and principal component analysis (PCA) between the CRF group and normal control group. The result showed discrimination, but was partly overlapping. The predictive model of CRF was analyzed and established by bioinformatics with biological markers that comprise seven distinct mass spectrum peaks, such as M/Z1049.61, M/Z1076.94, M/Z15295.7, and so on. The predictive model can be used in the sample classification between the CRF group and normal control group (The sensitivity of the predictive model is 61.4%; the specificity is 57.3%; and the predictive exactitude rate is 64.4%). It can be concluded that using the SELDI-TOF-MS technique, the proteinum markers of tongue coating of CRF have been preliminarily screened. The established predictive model provides objective evidence for the study on CRF diagnosis.