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2004: Alvarez-Larrán Alberto; García-Pagán Juan Carlos; Abraldes Juan G; Arellano Eduardo; Reverter Juan Carlos; Bosch Jaume; Cervantes Francisco
Increased CD11b neutrophil expression in Budd-Chiari syndrome or portal vein thrombosis secondary to polycythaemia vera.
British journal of haematology 2004;124(3):329-35.
Budd-Chiari syndrome and portal vein thrombosis (BCS/PVT) are frequently associated with polycythaemia vera (PV). In an attempt to elucidate the mechanisms of BCS/PVT secondary to PV (T-PV), CD11b neutrophil expression, neutrophil oxidative burst and platelet-neutrophil complexes (PNC) were assessed in 17 such patients. Three groups served as controls: BCS/PVT not secondary to PV (T-nPV; n = 20), PV without thrombosis (PV-nT; n = 16), and healthy controls (HC; n = 20). Baseline CD11b expression (in mean fluorescence intensity units) was 101 [95% confidence interval (CI): 79-128] in T-PV patients, versus 25 (95% CI: 18-35) in T-nPV, 59 (95% CI: 43-80) in PV-nT, and 34 (95% CI: 25-48) in HC (P < 0.001). After N-formyl-L-methionyl-L-leucyl-L-phenylalanine activation, T-PV patients also showed higher CD11b values: 190 (95% CI: 151-238), versus 55 (95% CI: 41-72) in T-nPV, 111 (95% CI: 81-153) in PV-nT, and 77 (95% CI: 63-95) in HC (P < 0.001). In BCS/PVT, CD11b neutrophil expression had 90% specificity and 100% sensitivity for the association with PV. Finally, PV patients had higher oxidative burst and PNC than T-nPV patients or HC (P < 0.05). These results support a role for neutrophils in BCS/PVT secondary to PV and indicate that neutrophil CD11b expression could be of use for PV screening in BCS/PVT patients.

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