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Updated: Jun 13, 2026
07:11
Maintaining Human Glioblastoma Cellular Diversity Ex vivo using Three-Dimensional Organoid Culture
Published on: August 25, 2022
Integrin alpha 6 regulates glioblastoma stem cells
Justin D Lathia1, Joseph Gallagher, John M Heddleston
1Department of Stem Cell Biology and Regenerative Medicine, Cleveland Clinic, Cleveland, OH 44195, USA.
Cell Stem Cell
|May 11, 2010
Summary
Integrin alpha6 is a novel marker for glioblastoma stem cells (GSCs). Targeting this marker inhibits GSC self-renewal and tumor formation, offering a promising new glioblastoma therapy.
Area of Science:
- Oncology
- Cancer Biology
- Neuroscience
Background:
- Cancer stem cells (CSCs) drive tumor growth, metastasis, and treatment resistance.
- Identifying CSCs is crucial for developing new cancer therapies.
- Current CSC markers, like CD133, have unclear roles in tumor maintenance.
Purpose of the Study:
- To identify novel CSC enrichment markers with functional significance.
- To investigate the role of integrin alpha6 in glioblastoma stem cells (GSCs).
Main Methods:
- Examined the glioblastoma stem cell perivascular microenvironment in patient specimens.
- Assessed integrin alpha6 expression and its correlation with GSC markers.
- Targeted integrin alpha6 in GSCs to evaluate its functional impact.
Main Results:
- Identified integrin alpha6 as a novel GSC enrichment marker.
- Integrin alpha6 is coexpressed with conventional GSC markers.
- Targeting integrin alpha6 inhibited GSC self-renewal, proliferation, and tumor formation.
Conclusions:
- Glioblastoma stem cells express high levels of integrin alpha6.
- Integrin alpha6 can serve as both an enrichment marker and a therapeutic target for glioblastoma.
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Integrins act both as extracellular input receivers and as intracellular processing activators. As their name suggests, integrins are entirely integrated into the membrane structure. Their hydrophobic membrane-spanning regions interact with the phospholipid bilayer's hydrophobic region. These membrane receptors provide extracellular attachment sites for effectors like hormones and growth factors. They activate intracellular response cascades when their effectors are bound and active.
Some...
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01:15Activation of Integrins
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In "outside-in signaling," external factors in the extracellular space bind to exposed ligand binding sites on integrins. This causes the inactive protein to undergo a conformational change to become active. Integrins are often clustered on the cell membrane. Repetitive and regularly spaced ligand binding events provide an effective stimulus.
In "outside-in signaling," external factors in the extracellular space bind to exposed ligand binding sites on integrins. This causes the inactive protein to undergo a conformational change to become active. Integrins are often clustered on the cell membrane. Repetitive and regularly spaced ligand binding events provide an effective stimulus.
01:10Integrins
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