Tumor-associated vacuolar ATPase subunit promotes tumorigenic characteristics in macrophages

Oncogene
G K KataraKenneth Beaman

Abstract

Macrophage polarization contributes to distinct human pathologies. In tumors, a polarized M2 phenotype called tumor-associated macrophages (TAMs) are associated with promotion of invasion and angiogenesis. In cancer cells, vacuolar ATPase (V-ATPase), a multi-subunit enzyme, is expressed on the plasma/vesicular membranes and critically influences the metastatic behavior. In addition, the soluble, cleaved N-terminal domain of a2 isoform of V-ATPase (a2NTD) is associated with in vitro induction of pro-tumorigenic properties in monocytes. This activity of a2 isoform of V-ATPase (a2V) caused us to investigate its role in cancer progression through the evaluation of the immunomodulatory properties of a2NTD. Here, we present direct evidence that surface expression of V-ATPase is associated with macrophage polarization in tumor tissue. Macrophages from BALB/c mice (peritoneal/bone marrow derived) were stimulated with recombinant a2NTD in both ex vivo and in vivo systems and evaluated for TAM characteristics. a2V was highly expressed in tumor tissues (breast and skin) as well as on the surface of tumor cell lines. The a2NTD-stimulated macrophages (a2MΦ) acquired TAM phenotype, which was characterized by elevated expression of mannose re...Continue Reading

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Citations

Dec 22, 2015·Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology·Luciana StriederEstela Kaminagakura
Jun 14, 2016·American Journal of Reproductive Immunology : AJRI·Kenneth D BeamanAlice Gilman-Sachs
Mar 8, 2017·Seminars in Cancer Biology·Veronica HuberLicia Rivoltini
Jul 22, 2014·Cellular & Molecular Immunology·Kenneth D BeamanAlice Gilman-Sachs
Jan 12, 2020·Molecular Oncology·Safaa A IbrahimKenneth D Beaman
Apr 17, 2015·Journal of Leukocyte Biology·Alice Gilman-SachsKenneth Beaman
Mar 27, 2020·Gastroenterology Research and Practice·Wenjie LiHong Zhu
Jan 24, 2021·Medicinal Research Reviews·Cátia Santos-PereiraManuela Côrte-Real
Feb 6, 2021·Frontiers in Oncology·Yiwen SangWeiwei Liu
Jul 4, 2019·Cell Metabolism·Ilio VitaleLorenzo Galluzzi

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