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B49, a BST-2-based peptide, inhibits adhesion and growth of breast cancer cells

Wadie D Mahauad-Fernandez1,2, Chioma M Okeoma3,4

  • 1Department of Microbiology and Immunology, Carver College of Medicine, University of Iowa, 51 Newton Road, Iowa City, IA, 52242-1109, USA.

Scientific Reports
|March 11, 2018
PubMed

Insights

A novel peptide, B49, effectively inhibits breast cancer cell adhesion and growth by targeting Bone marrow stromal antigen 2 (BST-2). This peptide shows promise as a therapeutic lead for BST-2-dependent cancers.

Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • Bone marrow stromal antigen 2 (BST-2), also known as Tetherin, is implicated in cancer growth and progression.
  • BST-2 promotes tumor effects via dimer formation, enhancing cell adhesion, motility, survival, and growth.

Purpose of the Study:

  • To evaluate the effect of a novel BST-2-based peptide, B49, on breast cancer cell adhesion and growth.
  • To assess B49's anti-tumor efficacy in a preclinical breast cancer model.

Main Methods:

  • Assessed homotypic/heterotypic adhesion, 3D spheroid formation, and anchorage-independent growth to evaluate B49's impact on cell adhesion and growth.
  • Utilized a preclinical mouse model to provide evidence of B49's anti-tumor effect.

Main Results:

  • B49 significantly inhibited breast cancer cell adhesion to other cancer cells and tumor microenvironment components.
  • B49 demonstrated significant inhibition of key cancer cell growth indicators: spheroid formation, anchorage-independent growth, and primary tumor growth.

Conclusions:

  • BST-2 plays a crucial role in mediating breast cancer cell adhesion and growth.
  • B49 and its analog B49Mod1 effectively inhibit BST-2-mediated cancer cell adhesion and growth.
  • B49 and its analogs represent a promising therapeutic strategy for BST-2-dependent cancers.

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