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Terpos, E. et al.

Terpos, Politou, Viniou, Rahemtulla,

Significance of macrophage inflammatory protein-1 alpha (MIP-1alpha) in multiple myeloma.

Macrophage inflammatory protein-1 alpha (MIP-1alpha) is a member of the CC chemokine family and is primarily associated with cell adhesion and migration. It is produced by myeloma (MM) cells and directly stimulates osteoclast formation and differentiation in a dose dependent way. MIP-1alpha protein levels were elevated in the bone marrow plasma of MM patients and correlated with disease stage and activity. MIP-1alpha was also elevated in the serum of myeloma patients with severe bone disease and correlated positively with bone resorption markers providing evidence for a causal role of MIP-1alpha in the development of lytic bone lesions in MM. MIP-1alpha has also been found to stimulate proliferation, migration and survival of plasma cells. Mice, which were inoculated with myeloma cells and treated with a monoclonal rat anti-mouse MIP-1alpha antibody, showed a reduction of both paraprotein and lytic lesions. In addition, MIP-1alpha enhanced adhesive interactions between myeloma and marrow stromal cells, increasing the expression of RANKL and IL-6, which further increased bone destruction and tumor burden. Myeloma patients with high MIP-1alpha serum levels have poor prognosis. The positive correlation between MIP-1alpha and beta(2)-microglobulin that has been observed in MM patients at diagnosis further supports the notion that MIP-1alpha is not only a chemokine with osteoclast activity function but is also implicated in myeloma growth and survival. Therefore, MIP-1alpha pathway may serve as a target for the development of novel anti-myeloma therapies.[1]

References

Significance of macrophage inflammatory protein-1 alpha (MIP-1alpha) in multiple myeloma. Terpos, E., Politou, M., Viniou, N., Rahemtulla, A. Leuk. Lymphoma (2005) [Pubmed]

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