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Correlation of Mast Cell Density With Angiogenic Cytokines in Patients With Active Multiple Myeloma
Rodanthi Vyzoukaki1, George Tsirakis2, Constantina A Pappa3
1Hematology Laboratory, University Hospital of Heraklion, Heraklion, Greece.
Purpose:
The aim of the study is to estimate whether bone marrow mast cell density (MCD) in multiple myeloma (MM) correlates with circulating levels of various angiogenic factors.
Methods:
In 70 patients with newly diagnosed active MM, we measured MCD using immunohistochemical stain for tryptase and serum levels of matrix metalloproteinase 9 (MMP-9), angiopoietin 2 (ANGIOP-2), and angiogenin (ANG) with ELISA.
Findings:
Levels of MCD, ANGIOP-2, and ANG were significantly higher in MM patients compared with the control group. The MMP-9 level was higher in MM patients compared with the control group but without statistical significance. All values were increasing in parallel with clinical stages. Furthermore, MCD correlated positively with MMP-9, ANGIOP-2, and ANG.
Implications:
MCs participate in the angiogenic processes of MM, with complex implicated mechanisms. This interplay between MCs and the other participants favors angiogenesis and MM growth.

