Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Effects of Anticancer Agent P-bi-TAT on Gene Expression Link the Integrin Thyroid Hormone Receptor to Expression of Stemness and Energy Metabolism Genes in Cancer Cells

Version 1 : Received: 7 March 2022 / Approved: 9 March 2022 / Online: 9 March 2022 (01:55:26 CET)

A peer-reviewed article of this Preprint also exists.

Glinsky, G.V.; Godugu, K.; Sudha, T.; Rajabi, M.; Chittur, S.V.; Hercbergs, A.A.; Mousa, S.A.; Davis, P.J. Effects of Anticancer Agent P-bi-TAT on Gene Expression Link the Integrin Thyroid Hormone Receptor to Expression of Stemness and Energy Metabolism Genes in Cancer Cells. Metabolites 2022, 12, 325. Glinsky, G.V.; Godugu, K.; Sudha, T.; Rajabi, M.; Chittur, S.V.; Hercbergs, A.A.; Mousa, S.A.; Davis, P.J. Effects of Anticancer Agent P-bi-TAT on Gene Expression Link the Integrin Thyroid Hormone Receptor to Expression of Stemness and Energy Metabolism Genes in Cancer Cells. Metabolites 2022, 12, 325.

Journal reference: Metabolites 2022, 12, 325
DOI: 10.3390/metabo12040325

Abstract

Chemically modified forms of tetraiodothyroacetic acid (tetrac), an L-thyroxine derivative, have been shown to exert their anticancer activity at plasma membrane integrin αvβ3 of tumor cells. Via a specific hormone receptor on the integrin, tetrac-based therapeutic agents modulate expression of genes relevant to cancer cell proliferation, survival and energy metabolism. P-bi-TAT, a novel bivalent tetrac-containing synthetic compound has anticancer activity in vitro and in vivo against Glioblastoma Multiforme (GBM) and other types of human cancers. In the current study, microarray analysis was carried out on a primary culture of human GBM cells exposed to P-bi-TAT (10-6 tetrac equivalent) for 24 h. P-bi-TAT significantly affected expression of a large panel of genes implicated in cancer cell stemness, growth, survival, and angiogenesis. Recent interest elsewhere in ATP synthase as a target in GBM cells caused us to focus attention on expression of genes involved in energy metabolism. Significantly downregulated transcripts included multiple energy metabolism-related genes: electron transport chain genes ATP5A1 (ATP synthase 1), ATP51, ATP5G2, COX6B1 (cytochrome c oxidase subunit 6B1), NDUFA8 (NADH dehydrogenase [ubiquinone] FA8), NDUFV2I and other NDUF genes. The NDUF and ATP genes are also relevant to control of oxidative phosphorylation and transcription. Qualitatively similar actions of P-bi-TAT on expression of energy metabolism-linked genes were also detected in established human GBM and pancreatic cancer cell lines. In conclusion, acting at αvβ3 integrin, P-bi-TAT caused downregulation in human cancer cells of expression of a large number of genes involved in electron transport and oxidative phosphorylation. These observations suggest that cell surface thyroid hormone receptors on αvβ3 regulate expression of genes relevant to tumor cell stemness and energy metabolism.

Keywords

ATP synthase; cancer cell; mitochondria; glioblastoma; integrin αvβ3; NADH dehydro-genase; tetrac; thyroid hormones

Subject

LIFE SCIENCES, Genetics

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