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Related Experiment Video

Updated: Apr 16, 2026

LINE-1 Methylation Analysis in Mesenchymal Stem Cells Treated with Osteosarcoma-Derived Extracellular Vesicles
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The histone code reader SPIN1 controls RET signaling in liposarcoma.

Henriette Franz1, Holger Greschik1, Dominica Willmann1

  • 1Urologische Klinik und Zentrale Klinische Forschung, Klinikum der Universität Freiburg, Freiburg, Germany.

Oncotarget
|March 10, 2015
PubMed
Summary

Spindlin1 (SPIN1) protein drives liposarcoma growth by boosting GDNF and RET signaling. Inhibiting SPIN1’s chromatin binding offers a potential new therapy for liposarcoma.

Keywords:
GDNFMAZRET signalingSPIN1histone code reader

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Area of Science:

  • Oncology
  • Molecular Biology
  • Epigenetics

Background:

  • Spindlin1 (SPIN1), a histone code reader, is linked to cancer but its precise role in liposarcoma is unclear.
  • Understanding SPIN1's molecular mechanisms is crucial for developing targeted liposarcoma therapies.

Purpose of the Study:

  • To elucidate the molecular mechanisms by which SPIN1 influences liposarcoma cell proliferation and survival.
  • To investigate the potential of targeting SPIN1 as a therapeutic strategy for liposarcoma.

Main Methods:

  • In vitro and xenograft mouse models of liposarcoma.
  • Signaling pathway analysis, genome-wide chromatin immunoprecipitation sequencing (ChIP-seq), and transcriptome analysis (RNA-seq).
  • Analysis of SPIN1, MAZ, GDNF, and RET pathway activation in human liposarcoma tissues.

Main Results:

  • Reduced SPIN1 levels impaired liposarcoma cell proliferation and increased apoptosis.
  • SPIN1, in conjunction with MAZ, directly enhances Glial cell line-Derived Neurotrophic Factor (GDNF) expression, activating the RET signaling pathway.
  • Knockdown of SPIN1 or MAZ decreased GDNF and activated RET, leading to reduced proliferation and survival.
  • SPIN1, GDNF, activated RET, and MAZ are upregulated in human liposarcoma.
  • A SPIN1 mutation disrupting chromatin binding reduced liposarcoma cell proliferation and survival.

Conclusions:

  • SPIN1 promotes liposarcoma progression by enhancing the SPIN1-MAZ-GDNF-RET signaling axis.
  • SPIN1's chromatin association is essential for its oncogenic function in liposarcoma.
  • Targeting SPIN1's interaction with chromatin may offer a novel therapeutic avenue for liposarcoma.