[Analysis of overexpression of vascular endothelial growth factor-C in patients with angioimmunoblastic T-cell lymphoma].

Objective: To explore the vascular endothelial growth factor-C (VEGF-C) expression and its clinical significance in malignant lymphoma.

Methods: Lymphoma cells were isolated by laser microdissection. VEGF-C expression in lymphoma tissue and microdissected lymphoma cells was measured by realtime quantitative PCR. Meanwhile, vessel ultrastructure was identified by transmission electron microscopy.

Results: Comparing with that in 8 patients with reactive lymphocyte hyperplasia, VEGF-C was overexpressed in angioimmunoblastic T-cell lymphoma, both in lymphoma tissue (n = 18, P = 0.0020) and in microdissected lymphoma cells (n = 10, P < 0.0001). Increased VEGF-C level was associated with bone marrow infiltration (P = 0.0039), skin involvement (P = 0.0046) and high-risk international prognostic index (P = 0.0302). In VEGF-C overexpressed cases, ultrastructural study showed dystrophic vessels, with swelling endothelial cells and absence of pericytes.

Conclusion: The value of VEGF-C expression might be a biomarker of disease progression in angioimmunoblastic T-cell lymphoma.