Al-Rayahi_et_al-2017-Immunity,_Inflammation_and_Disease.pdf (3.83 MB)
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Tumour cell conditioned medium reveals greater M2 skewing of macrophages in the absence of properdin.

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journal contribution
posted on 07.03.2017, 15:33 by Izzat A.M. Al-Rayahi, Michael J. Browning, Cordula Stover
INTRODUCTION: The tumour microenvironment is shaped by the interaction of immune, non immune, and tumour cells present in close proximity. Tumour cells direct the development of a locally immune suppressed state, affecting the activity of anti tumour T cells and preparing the escape phase of tumour development. Macrophages in the tumour typically develop into so-called tumour associated macrophages with a distinct profile of activities which lead to a reduction in inflammation and antigen presentation. The direct impact of tumour cell conditioned medium on the activity profile of macrophages in dependence of their complement component expression has not yet been investigated. METHODS: In our in vitro study, macrophages differentiated from bone marrows of properdin deficient and wildtype mice were stimulated with conditioned medium of a syngeneic tumour cell line, B16F10, a mouse melanoma subline. RESULTS: In comparison with macrophages from wildtype mice, those from congenic properdin deficient mice showed skewing towards M2 profile, encompassing mRNA expression for genes involved in arginine metabolism, production of type 2 cytokines, and relatively lower surface expression of molecules needed for antigen presentation. CONCLUSIONS: These data suggest that properdin insufficiency promotes a tumour environment that helps the tumour evade the immune response.

History

Citation

Immunity, Inflammation and Disease, 2017, 5 (1), pp. 68-77

Author affiliation

/Organisation/COLLEGE OF MEDICINE, BIOLOGICAL SCIENCES AND PSYCHOLOGY/School of Medicine/Department of Infection, Immunity and Inflammation

Version

VoR (Version of Record)

Published in

Immunity

Publisher

Wiley

eissn

2050-4527

Acceptance date

28/10/2016

Copyright date

2017

Available date

07/03/2017

Publisher version

http://onlinelibrary.wiley.com/doi/10.1002/iid3.142/abstract

Language

en

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