Multiple myeloma cells express key immunoregulatory cytokines and modulate the monocyte migratory response

Leonardo Freire-de-Lima, Ana Flávia Fernandes Ribas Nardy, Erivan Schnaider Ramos-Junior, Luciana Conde, Jéssica Santos Lemos, Leonardo Marques da Fonseca, Juliana Echevarria Lima, Angelo Maiolino, Alexandre Morrot

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Multiple myeloma (MM) is a plasma cell disorder that still remains incurable. The immune dysfunction of the host is a striking characteristic of MM, leading to tumor growth and reducing the survival rate of patients. Monocytes are precursors of conventional dendritic cells (DCs), a major player in the immunity mechanisms driving protective T cell responses against tumor. Herein, we report that human MM RPMI 8226 cell line shows a pronounced chemoattractant activity for monocytes and also expresses enhanced levels of the leukocyte chemotactic cytokines CXCL12, CCL5, MIP-1β, and CXCL10 in association with elevated levels of both key immunoregulatory interleukins such as IL-4 and IL-10. This cytokine profile was observed together with reduced expression of IFN-ϒ by MM RPMI 8226 cell line, a determinant interleukin involved in the acquisition of cellular-mediated protective responses against tumor cells. We further demonstrate that MM RPMI 8226 cell line expresses elevated levels of soluble form of the intercellular adhesion molecule-1 known to inhibit antitumoral T cell responses. This attractive modulation of immune responses by MM cells might provide a means to impair early antitumor responses during the establishment of cytokine-mediated immunosuppressive tumor niche.

Original languageEnglish (US)
Article number92
JournalFrontiers of Medicine
Volume4
DOIs
StatePublished - Jun 27 2017
Externally publishedYes

Keywords

  • Immune response
  • Immunoregulation
  • Leukocyte migration
  • Monocytes
  • Multiple myeloma

ASJC Scopus subject areas

  • Medicine(all)

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