Abstract

Thrombocytopenia is frequently found in patients with chronic liver disease, and associated with advanced fibrosis stage and with decreased liver function. Serum thrombopoietin (TPO) levels also decrease as the disease progresses from mild fibrosis to cirrhosis. On the other hand, platelet counts increase associated with improvement of fibrosis in chronic hepatitis C (CH-C) patients with sustained virological response (SVR) to interferon (IFN) therapy. Then, we studied if the increase of platelet counts in SVR associate with elevated TPO production or a reduction of spleen size. Liver fibrosis, spleen size, serum TPO levels, albumin, zinc turbidity test (ZTT), platelet counts were compared in fifteen CH-C patients with SVR before and after IFN therapy. Albumin increased from 4.2+/-0.3 to 4.3+/-0.3g/dl (p=0.067), ZTT decreased from 17.7+/-5.9 to 8.9+/-3.9K-U (p<0.001), platelet counts increased from 15.5+/-6.8x10(4) to 19.9+/-5.8x10(4)/mul (p<0.01) and serum TPO levels increased from 1.65+/-0.94 to 2.06+/-1.22fmol/ml (p=0.073). Spleen size was measured by ultrasonography, and the spleen index was calculated by multiplication of the long and short axes from hilus, which decreased from 14.6+/-5.0 to 10+/-3.1 (p<0.001) after IFN therapy. In conclusion, increase of platelet counts in SVR may be related to the reduction of spleen size and increased serum TPO levels associated with improvement of fibrosis after IFN therapy.

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