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THBS1 (thrombospondin-1).

Jeffrey S Isenberg1, David D Roberts2

  • 1Radiation Control Technologies, Inc., Loudonville, NY, USA.

Atlas of Genetics and Cytogenetics in Oncology and Haematology
|November 27, 2020
PubMed
Summary
This summary is machine-generated.

Thrombospondin-1 (THBS1) expression loss is common in cancer, impacting tumor growth and patient prognosis. This protein regulates key processes like angiogenesis and immunity within the tumor microenvironment.

Keywords:
matricellularmetastasisresistance to genotoxic therapythrombospondin-1tumor angiogenesis

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Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • Thrombospondins are a family of 5 genes in vertebrates.
  • THBS1 mutations are rare in cancer, but its expression is often reduced due to oncogenic activity and epigenetic changes.
  • Reduced thrombospondin-1 expression correlates with poor prognosis in certain cancers.

Purpose of the Study:

  • To investigate the role of thrombospondin-1 in cancer development and progression.
  • To understand how thrombospondin-1 influences the tumor microenvironment and therapeutic responses.

Main Methods:

  • Analysis of THBS1 gene expression in various cancer types.
  • Investigating the regulatory mechanisms of THBS1 expression (tumor suppressors, oncogenes, methylation).
  • Studying the function of thrombospondin-1 in cellular processes relevant to cancer (angiogenesis, immunity, migration, protease activity).

Main Results:

  • Thrombospondin-1 expression is frequently downregulated during oncogenesis.
  • Thrombospondin-1 inhibits tumor angiogenesis and modulates antitumor immunity.
  • It also influences tumor cell migration and the activity of proteases and growth factors.
  • Differential effects on normal versus malignant cells impact therapeutic sensitivity.

Conclusions:

  • Loss of thrombospondin-1 is a significant event in cancer progression.
  • Thrombospondin-1 plays a multifaceted role in the tumor microenvironment, affecting tumor growth, metastasis, and response to therapy.
  • Targeting thrombospondin-1 pathways may offer novel therapeutic strategies.