SRSF10-mediated IL1RAP alternative splicing regulates cervical cancer oncogenesis via mIL1RAP-NF-κB-CD47 axis

Oncogene. 2018 May;37(18):2394-2409. doi: 10.1038/s41388-017-0119-6. Epub 2018 Feb 12.

Abstract

High-risk human papillomavirus oncoproteins E6 and E7 are the major etiological factors of cervical cancer but are insufficient for malignant transformation of cervical cancer. Dysregulated alternative splicing, mainly ascribed to aberrant splicing factor levels and activities, contributes to most cancer hallmarks. However, do E6 and E7 regulate the expression of splicing factors? Does alternative splicing acts as an "accomplice" of E6E7 to promote cervical cancer progression? Here, we identified that the splicing factor SRSF10, which promotes tumorigenesis of cervix, was upregulated by E6E7 via E2F1 transcriptional activation. SRSF10 modulates the alternate terminator of interleukin-1 receptor accessory protein exon 13 to increase production of the membrane form of interleukin-1 receptor accessory protein. SRSF10-mediated mIL1RAP upregulates the expression of the "don't eat me" signal CD47 to inhibit macrophage phagocytosis by promoting nuclear factor-κB activation, which is pivotal in inflammatory, immune, and tumorigenesis processes. Altogether, these data reveal a close relationship among HPV infection, alternative splicing and tumor immune evasion, and also suggests that the SRSF10-mIL1RAP-CD47 axis could be an attractive therapeutic target for the treatment of cervical cancer.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alternative Splicing / genetics*
  • Animals
  • CD47 Antigen / metabolism
  • Carcinogenesis / genetics*
  • Carcinogenesis / metabolism
  • Carcinogenesis / pathology
  • Cell Cycle Proteins / physiology*
  • Cell Transformation, Viral / genetics
  • Female
  • Gene Expression Regulation, Neoplastic
  • HEK293 Cells
  • Human papillomavirus 16 / physiology
  • Human papillomavirus 18 / physiology
  • Humans
  • Interleukin-1 Receptor Accessory Protein / genetics*
  • Mice
  • Mice, Nude
  • NF-kappa B / metabolism
  • Protein Isoforms / genetics
  • Repressor Proteins / physiology*
  • Serine-Arginine Splicing Factors / physiology*
  • Signal Transduction / genetics
  • Tumor Cells, Cultured
  • Uterine Cervical Neoplasms / genetics*
  • Uterine Cervical Neoplasms / pathology
  • Uterine Cervical Neoplasms / virology

Substances

  • CD47 Antigen
  • CD47 protein, human
  • Cell Cycle Proteins
  • IL1RAP protein, human
  • Interleukin-1 Receptor Accessory Protein
  • NF-kappa B
  • Protein Isoforms
  • Repressor Proteins
  • SRSF10 protein, human
  • Serine-Arginine Splicing Factors