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Reticulated platelets and thrombopoietin in schistosomiasis patients
L A Köpke-Aguiar1, C P de Leon, D C Shigueoka
1Department of Medicine, Radiology and Biochemistry, Universidade Federal de São Paulo, São Paulo, Brazil.
International Journal of Laboratory Hematology
|January 16, 2009
Summary
Schistosomiasis patients with portal hypertension show increased reticulated platelets. Thrombopoietin (TPO) levels remain normal, suggesting reticulated platelets are a key indicator for liver disease progression.
Area of Science:
- Hepatology
- Hematology
- Parasitology
Background:
- Schistosomiasis mansoni is a non-cirrhotic liver disease.
- Portal hypertension in cirrhosis patients is linked to decreased reticulated platelets and increased thrombopoietin (TPO).
- A prior study identified a 120/nl platelet count as a marker for significant portal hypertension in schistosomiasis.
Purpose of the Study:
- To assess reticulated platelet counts and TPO serum levels in schistosomiasis patients.
- To correlate these markers with indicators of portal hypertension.
- To investigate the role of reticulated platelets and TPO in schistosomiasis-related liver disease.
Main Methods:
- Flow cytometry (CD41 antibody, thiazol orange) for reticulated platelet quantification.
- ELISA for serum TPO and hyaluronic acid levels.
- Endoscopic and ultrasonographic (Niamey protocol) assessment of portal hypertension and spleen/vein dimensions.
Main Results:
- A platelet count of 120/nl accurately distinguished between patients with and without significant portal hypertension (100% accuracy, PPV, NPV).
- Significant differences were observed in reticulated platelet counts (P=0.025) and hyaluronic acid levels (P=0.012) between the groups.
- Thrombopoietin (TPO) serum levels did not differ significantly (P=0.769) between patients with and without portal hypertension.
Conclusions:
- Schistosomiasis patients with portal hypertension exhibit elevated reticulated platelet counts.
- Normal serum TPO levels in these patients suggest an alternative regulatory mechanism or platelet source.
- Reticulated platelets may serve as a valuable biomarker for clinically significant portal hypertension in schistosomiasis.
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