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Flow cytometry assessment of monocyte subsets alteration in hepatocellular carcinoma post hepatitis C virus infection.

Hepatocellular carcinoma (HCC) is assumed to be an immunogenic malignancy since 90% of cases develop in environments with ongoing inflammation. Monocyte subsets contribute to tumoral immunity. Most HCC patients are discovered at late stages, which lowers their survival chances. We aimed to determine whether altered frequency of monocyte subsets contribute to post hepatitis C virus infection-liver cirrhosis (HCV-LC) development to HCC. This cross-sectional study enrolled 105 patients classified as post HCV-HCC (n=72) and post HCV-LC (n=33) patients. The monocyte subsets frequency was assessed by flow-cytometry. There was a significant increase in intermediate monocytes and decrease in non-classical monocytes in HCC group when compared to the LC group (P = 0.001 and 0.006, respectively). Intermediate monocyte frequency was positively correlated with cholesterol and triglycerides (r = 0.296, P < 0.002 and r = 0.247, P < 0.011, respectively). The receiver operating characteristic (ROC) curve revealed that intermediate monocytes percentage at a cutoff ≥ 0.625% and non-classical monocytes percentage at a cutoff ≤ 0.61% differentiated between patients with HCV-LC and those with HCV-HCC with a sensitivity of 76.4% and 69.4%, respectively, while both revealed low specificity of 51.5%. According to logistic regression analysis, only the triglyceride level was found to be an independent risk factor for HCC development [OR =1.014 (11.001-1.026), P = 0.031]. Finally, we concluded that post-HCV-HCC is characterized by an upregulation of intermediate monocytes and a downregulation of non-classical monocytes when compared to Post-HCV-LC. Intermediate and non-classical monocytes frequency can aid to screening biomarkers for HCC development. Intermediate monocyte frequency may be linked to hyperlipemia. The level of triglycerides is proposed as an independent risk factor for HCC emergence.