PCI Comp Stat

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Title *

Hemangiosarcoma cells induce M2 polarization and PD-L1 expression in macrophagesuse asterix (*) to get italics

Authors *

Kevin Christian M. Gulay, Keisuke Aoshima, Naoya Maekawa, Satoru Konnai, Atsushi Kobayashi, Takashi KimuraPlease use the format "First name initials family name" as in "Marie S. Curie, Niels H. D. Bohr, Albert Einstein, John R. R. Tolkien, Donna T. Strickland"

Year *

2022

Picture *

Abstract *

<p>AbstractHemangiosarcoma (HSA) is a malignant tumor derived from endothelial cells. Tumor-associated macrophages are one of the major components of tumor microenvironment and crucial for cancer development. The presence and function of macrophages in HSA have not been studied because there is no syngeneic model for HSA. In this study, we evaluated two mouse HSA cell lines and one immortalized mouse endothelial cells for their usefulness as syngeneic models for canine HSA. Our results show that the ISOS-1 cell line develops tumors with similar morphology to canine HSA. ISOS-1 cells highly express KDM2B and have similar KDM2B target expression patterns with canine HSA. Moreover, we determine that in both ISOS-1 and canine HSA tumors, macrophages are present as a major constituent of the tumor microenvironment. These macrophages are positive for CD204, an M2 macrophage marker, and express PD-L1. ISOS-1-conditioned medium can induce M2 polarization and PD-L1 expression in RAW264.7 mouse macrophage cell line. These results show that ISOS-1 can be used as a syngenic model for canine HSA and suggest that macrophages play an important role in immune evasion in HSA. Using the syngeneic mouse model for canine HSA, we can further study the role of immune cells in the pathology of HSA.</p>

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Keywords (optional)

None

Methods that require specific expertise (optional)

NonePlease indicate the methods that may require specialised expertise during the peer review process (use a comma to separate various required expertises).

Thematic fields *

TEST

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Submission date

2021-08-05 10:49:41

Recommender

Marjolaine INRA Recommandeur

Reviewers

OFA ., thomas Guillemaud, Denis SupAgro , Marjolaine Outsider

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