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Increased soluble P-selectin levels in hepatitis C virus-related chronic hepatitis: correlation with viral load
P Ferroni1, A Mammarella, F Martini
1Department of Experimental Medicine and Pathology, University of Rome La Sapienza, Italy.
Insights
Hepatitis C virus (HCV) infection may directly cause platelet activation in chronic hepatitis C patients. This study found higher soluble P-selectin (sP-selectin) levels, indicating platelet activation, in patients with HCV.
Area of Science:
- Hepatology
- Immunology
- Hematology
Background:
- Platelet functional abnormalities are common in chronic liver disease but not fully understood.
- The clinical significance of these abnormalities requires further investigation.
Purpose of the Study:
- To investigate platelet activation markers, lipid profiles, and clotting activity in patients with chronic hepatitis C.
- To explore the relationship between platelet activation and disease severity.
Main Methods:
- Studied 39 patients with histologically confirmed chronic hepatitis C.
- Measured soluble P-selectin (sP-selectin), lipid levels, clotting factors, and platelet counts.
- Assessed platelet-associated immunoglobulin G (PAIgG) and correlated findings with Scheuer score and HCV-RNA levels.
Main Results:
- Chronic hepatitis C patients had lower platelet counts, factor VIIc, cholesterol, HDL, and LDL compared to controls.
- Plasma sP-selectin levels were significantly higher in patients, correlating with HCV-RNA and inversely with platelet count and lipids.
- Higher sP-selectin levels were observed in patients with lower platelet counts.
Conclusions:
- Hepatitis C virus (HCV) infection appears to be directly responsible for in vivo platelet activation in chronic hepatitis C.
- Elevated sP-selectin levels serve as a marker for platelet activation in this patient group.
Background:
Platelet functional abnormalities are commonly found in patients with chronic liver disease; however, their nature and clinical significance are still a matter of discussion.
Methods:
Soluble P-selectin (sP-selectin, a marker of in vivo platelet activation) levels, lipid pattern, and clotting activity were investigated in 39 patients with histologically confirmed chronic C hepatitis.
Results:
Serum factor VIIc (P < 0.01), total cholesterol (P < 0.005), high density lipoprotein (P < 0.001), and low density lipoprotein (P<0.05) levels were lower in patients compared with healthy subjects, whereas triglyceride and fibrinogen levels were similar in both groups. Platelet counts were lower in chronic hepatitis patients compared with controls (P < 0.0001), and approximately 20% of patients had thrombocytopenia (platelet counts < 110 x 10(3)/microL). Platelet-associated immunoglobulin G (PAIgG) was present in 30.8% of patients. Plasma sP-selectin levels were higher in hepatitis C patients compared with controls (P < 0.0001), and significant differences were observed with respect to the Scheuer score (P < 0.01). The analysis of the distribution of plasma sP-selectin showed the presence of higher levels in patients with low platelet counts compared with patients with normal platelet counts and controls (P < 0.0001); moreover, sP-selectin levels did not correlate with the presence of PAIgG. On the other hand, sP-selectin levels directly correlated with serum hepatitis C virus (HCV)-RNA (P < 0.05) and inversely correlated with platelet count, blood lipids, and factor VIIc.
Conclusions:
The results obtained in this study support the hypothesis that HCV infection might be directly responsible for a condition of in vivo platelet activation in patients with chronic C hepatitis.