Hyaluronan-CD44v3 interaction with Oct4-Sox2-Nanog promotes miR-302 expression leading to self-renewal, clonal formation, and cisplatin resistance in cancer stem cells from head and neck squamous cell carcinoma

J Biol Chem. 2012 Sep 21;287(39):32800-24. doi: 10.1074/jbc.M111.308528. Epub 2012 Jul 30.

Abstract

Human head and neck squamous cell carcinoma (HNSCC) is a highly malignant cancer associated with major morbidity and mortality. In this study, we determined that human HNSCC-derived HSC-3 cells contain a subpopulation of cancer stem cells (CSCs) characterized by high levels of CD44v3 and aldehyde dehydrogenase-1 (ALDH1) expression. These tumor cells also express several stem cell markers (the transcription factors Oct4, Sox2, and Nanog) and display the hallmark CSC properties of self-renewal/clonal formation and the ability to generate heterogeneous cell populations. Importantly, hyaluronan (HA) stimulates the CD44v3 (an HA receptor) interaction with Oct4-Sox2-Nanog leading to both a complex formation and the nuclear translocation of three CSC transcription factors. Further analysis reveals that microRNA-302 (miR-302) is controlled by an upstream promoter containing Oct4-Sox2-Nanog-binding sites, whereas chromatin immunoprecipitation (ChIP) assays demonstrate that stimulation of miR-302 expression by HA-CD44 is Oct4-Sox2-Nanog-dependent in HNSCC-specific CSCs. This process results in suppression of several epigenetic regulators (AOF1/AOF2 and DNMT1) and the up-regulation of several survival proteins (cIAP-1, cIAP-2, and XIAP) leading to self-renewal, clonal formation, and cisplatin resistance. These CSCs were transfected with a specific anti-miR-302 inhibitor to silence miR-302 expression and block its target functions. Our results demonstrate that the anti-miR-302 inhibitor not only enhances the expression of AOF1/AOF2 and DNMT1 but also abrogates the production of cIAP-1, cIAP-2, and XIAP and HA-CD44v3-mediated cancer stem cell functions. Taken together, these findings strongly support the contention that the HA-induced CD44v3 interaction with Oct4-Sox2-Nanog signaling plays a pivotal role in miR-302 production leading to AOF1/AOF2/DNMT1 down-regulation and survival of protein activation. All of these events are critically important for the acquisition of cancer stem cell properties, including self-renewal, clonal formation, and chemotherapy resistance in HA-CD44v3-activated head and neck cancer.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Aldehyde Dehydrogenase 1 Family
  • Antineoplastic Agents / pharmacology*
  • Carcinoma, Squamous Cell / genetics
  • Carcinoma, Squamous Cell / metabolism*
  • Carcinoma, Squamous Cell / pathology
  • Cell Survival / drug effects
  • Cell Survival / genetics
  • Cisplatin / pharmacology*
  • Drug Resistance, Neoplasm*
  • Epigenesis, Genetic / drug effects
  • Epigenesis, Genetic / genetics
  • Gene Expression Regulation, Neoplastic*
  • Homeodomain Proteins / genetics
  • Homeodomain Proteins / metabolism*
  • Humans
  • Hyaluronan Receptors / genetics
  • Hyaluronan Receptors / metabolism*
  • Hyaluronic Acid / genetics
  • Hyaluronic Acid / metabolism*
  • Isoenzymes / genetics
  • Isoenzymes / metabolism
  • MicroRNAs / biosynthesis*
  • MicroRNAs / genetics
  • Mouth Neoplasms / genetics
  • Mouth Neoplasms / metabolism*
  • Mouth Neoplasms / pathology
  • Nanog Homeobox Protein
  • Neoplasm Proteins / genetics
  • Neoplasm Proteins / metabolism*
  • Neoplastic Stem Cells / metabolism*
  • Neoplastic Stem Cells / pathology
  • Octamer Transcription Factor-3 / genetics
  • Octamer Transcription Factor-3 / metabolism*
  • RNA, Neoplasm / biosynthesis*
  • RNA, Neoplasm / genetics
  • Retinal Dehydrogenase / genetics
  • Retinal Dehydrogenase / metabolism
  • SOXB1 Transcription Factors / genetics
  • SOXB1 Transcription Factors / metabolism*
  • Signal Transduction / drug effects
  • Signal Transduction / genetics

Substances

  • Antineoplastic Agents
  • CD44V3,8-10
  • Homeodomain Proteins
  • Hyaluronan Receptors
  • Isoenzymes
  • MicroRNAs
  • NANOG protein, human
  • Nanog Homeobox Protein
  • Neoplasm Proteins
  • Octamer Transcription Factor-3
  • POU5F1 protein, human
  • RNA, Neoplasm
  • SOX2 protein, human
  • SOXB1 Transcription Factors
  • Hyaluronic Acid
  • Aldehyde Dehydrogenase 1 Family
  • ALDH1A1 protein, human
  • Retinal Dehydrogenase
  • Cisplatin