A functional role of S100A4/non-muscle myosin IIA axis for pro-tumorigenic vascular functions in glioblastoma.

Abstract

BACKGROUND:

Glioblastoma (GBM) is the most aggressive form of brain tumor and has vascular-rich features. The S100A4/non-muscle myosin IIA (NMIIA) axis contributes to aggressive phenotypes in a variety of human malignancies, but little is known about its involvement in GBM tumorigenesis. Herein, we examined the role of the S100A4/NMIIA axis during tumor progression and vasculogenesis in GBM.

METHODS:

We performed immunohistochemistry for S100A4, NMIIA, and two hypoxic markers, hypoxia-inducible factor-1α (HIF-1α) and carbonic anhydrase 9 (CA9), in samples from 94 GBM cases. The functional impact of S100A4 knockdown and hypoxia were also assessed using a GBM cell line.

RESULTS:

In clinical GBM samples, overexpression of S100A4 and NMIIA was observed in both non-pseudopalisading (Ps) and Ps (-associated) perinecrotic lesions, consistent with stabilization of HIF-1α and CA9. CD34(+) microvascular densities (MVDs) and the interaction of S100A4 and NMIIA were significantly higher in non-Ps perinecrotic lesions compared to those in Ps perinecrotic areas. In non-Ps perinecrotic lesions, S100A4(+)/HIF-1α(-) GBM cells were recruited to the surface of preexisting host vessels in the vascular-rich areas. Elevated vascular endothelial growth factor A (VEGFA) mRNA expression was found in S100A4(+)/HIF-1α(+) GBM cells adjacent to the vascular-rich areas. In addition, GBM patients with high S100A4 protein expression had significantly worse OS and PFS than did patients with low S100A4 expression. Knockdown of S100A4 in the GBM cell line KS-1 decreased migration capability, concomitant with decreased Slug expression; the opposite effects were elicited by blebbistatin-dependent inhibition of NMIIA.

CONCLUSION:

S100A4(+)/HIF-1α(-) GBM cells are recruited to (and migrate along) preexisting vessels through inhibition of NMIIA activity. This is likely stimulated by extracellular VEGF that is released by S100A4(+)/HIF-1α(+) tumor cells in non-Ps perinecrotic lesions. In turn, these events engender tumor progression via acceleration of pro-tumorigenic vascular functions. Video abstract.

• Authors: Madoca Inukai, Ako Yokoi, Yuuki Ishizuka, Miki Hashimura, Toshihide Matsumoto, Yasuko Oguri, Mayu Nakagawa, Yu Ishibashi, Takashi Ito, Toshihiro Kumabe, Makoto Saegusa
• Journal: Cell communication and signaling : CCS (Cell Commun Signal) Vol. 20 Issue 1 Pg. 46 (04 07 2022) ISSN: 1478-811X [Electronic] England
• PMID: 35392912 (Publication Type: Journal Article, Video-Audio Media, Research Support, Non-U.S. Gov't)
• Copyright: © 2022. The Author(s).

Chemical References

• Hypoxia-Inducible Factor 1, alpha Subunit
• S100 Calcium-Binding Protein A4
• Vascular Endothelial Growth Factor A
• S100A4 protein, human
• Nonmuscle Myosin Type IIA

Topics

• Brain Neoplasms (metabolism, pathology)
• Carcinogenesis
• Cell Line, Tumor
• Glioblastoma (metabolism, pathology)
• Humans
• Hypoxia-Inducible Factor 1, alpha Subunit (metabolism)
• Nonmuscle Myosin Type IIA (metabolism)
• S100 Calcium-Binding Protein A4 (metabolism)
• Vascular Endothelial Growth Factor A (metabolism)