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Abstract
Thrombocytopenia is a common problem complicating the course of liver disease. One of the postulated mechanisms in chronic liver disease is impaired production of the hormone, thrombopoietin (TPO). The aim of present study was to evaluate the role of TPO on the occurrence of thrombocytopenia. Serum TPO levels was determined by ELISA in 40 patients with liver disease (11 seropositive with hepatitis C; 10 with mixed liver cirrhosis; 19 with bilharzial hepatic fibrosis), plus 14 normal healthy subjects as a control group. The sTPO levels were unevenly distributed among the liver disease subgroups being the highest in the group with HCV (median 1232.0, range 154.7-2042.0 pg/ml) followed by the mixed cirrhosis group (556.5; 342.0-1497.0 pg/ml) and lowest among the bilharzial hepatic fibrosis group (130.0; 22.0-204.0 pg/ml) ( P <0.01). While sTPO levels in HCV and cirrhotic group were significantly higher when compared to the control group (97.0; 19.0-377.0 pg/ml), those in the Bilharzial hepatic fibrosis group were not significantly elevated ( P > 0.05). There is significant negative correlation between sTPO levels and spleen size ( R =−0.3, P =0.043); but there was no correlation with platelet count ( R =0.09, P >0.05). In addition, sTPO levels were significantly higher in patients with platelet counts ≥60×10 9 /l as compared to those with platelet counts <60×10 9 /l ( P =0.04). Using the receiver operating curve (ROC) at sTPO cut off value ≥ vs. < 368 ng/ml, most of HCV and cirrhotic patients had higher sTPO levels (81.8 and 80.0%, respectively), while all Bilharzial hepatic fibrosis group (100%) had lower sTPO levels. In conclusion, sTPO levels had no role in the occurrence of thrombocytopenia in liver disease patients and other factors appear to be more important. It also appears that the mechanism controlling sTPO levels might be different in cirrhotic patients compared to Bilharzial hepatic fibrosis patients.