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Updated: Feb 15, 2026

Tumorsphere Derivation and Treatment from Primary Tumor Cells Isolated from Mouse Rhabdomyosarcomas
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HNRNPH1 is required for rhabdomyosarcoma cell growth and survival

Yanfeng Li1, Jesse Bakke1, David Finkelstein2

  • 1Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, TN, USA.

Oncogenesis
|January 25, 2018
PubMed

Insights

Heterogenous nuclear ribonucleoprotein H1 (HNRNPH1) drives rhabdomyosarcoma (RMS) growth. Reducing HNRNPH1 levels inhibits RMS cell proliferation and tumor development by inducing apoptosis and cell cycle arrest.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • Rhabdomyosarcoma (RMS) is an aggressive pediatric cancer with poor prognosis for metastatic disease.
  • Heterogenous nuclear ribonucleoprotein H1 (HNRNPH1), an RNA-binding protein, is highly expressed in RMS.
  • Current RMS treatments have limited efficacy, especially for advanced stages.

Purpose of the Study:

  • To investigate the role of HNRNPH1 in RMS tumorigenesis.
  • To determine the effect of HNRNPH1 knockdown on RMS cell growth and tumor development.

Main Methods:

  • Investigated HNRNPH1 expression in RMS cell lines (RD, RH30, RH41).
  • Performed HNRNPH1 knockdown studies in vitro and in vivo (xenografts).
  • Utilized RNA sequencing to analyze gene expression changes post-HNRNPH1 knockdown.

Main Results:

  • HNRNPH1 knockdown significantly reduced RMS cell proliferation.
  • Knockdown induced apoptosis and cell cycle arrest in RMS cells.
  • In vivo studies showed reduced tumor formation and growth upon HNRNPH1 knockdown.
  • RNA sequencing revealed altered splicing of oncogenes following HNRNPH1 reduction.

Conclusions:

  • HNRNPH1 plays a crucial role in RMS development and progression.
  • Targeting HNRNPH1 may represent a potential therapeutic strategy for RMS.
  • Further research into HNRNPH1-mediated splicing alterations is warranted for RMS treatment development.

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