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  • Title: Association of serial serum major histocompatibility complex class I chain-related A measurements with hepatocellular carcinoma in chronic hepatitis C patients after viral eradication.
    Author: Huang CF, Wang SC, Yeh ML, Huang CI, Tsai PC, Lin ZY, Chen SC, Dai CY, Huang JF, Chuang WL, Chen A, Yu ML.
    Journal: J Gastroenterol Hepatol; 2019 Jan; 34(1):249-255. PubMed ID: 29932235.
    Abstract:
    BACKGROUND AND AIM: Major histocompatibility complex class I chain-related A (MICA) genetic variants and their serum levels (sMICA) were associated with the development of hepatitis C virus-related hepatocellular carcinoma (HCC) in untreated cohorts. The dynamic changes in serial sMICA levels and their association with HCC in the post-curative status are elusive. METHODS: Single nucleotide polymorphism rs2596542 of MICA and serial sMICA levels were analyzed in chronic hepatitis C patients with a sustained virologic response after antivirals. Forty-two patients who developed HCC and 84 age-matched, gender-matched, and cirrhosis propensity score-matched non-HCC controls were compared. Serial sMICA levels were measured within 6 months before treatment initiation (pre-sMICA), 6 months after the end of treatment (post-sMICA), and on the last visit before the development (or not) of HCC (last-sMICA). RESULTS: Cox regression analysis revealed that last-sMICA was the only predictive factor of HCC development (hazard ratio/95% confidence interval: 2.27 (per 1 log pg/mL increase)/1.672-3.082, P < 0.001). Patients without HCC development showed a significantly reduced trend of sMICA levels during follow-up (trend P = 0.001), which was observed only in GG genotype (trend P < 0.001) but not A allele carriers (P = 0.88). In contrast, patients with HCC showed an increased trend of sMICA levels (trend P = 0.024). However, only the GG genotype "high expressors" (trend P = 0.06) but not A allele carriers (P = 0.18) showed a correlation of substantially increased trend of sMICA levels and HCC development. CONCLUSIONS: Serial sMICA levels were associated with HCC development in SVR patients. The clinical utility of this finding is restricted to MICA rs2596542 GG genotype carriers.
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