A piece of collagen type IV (called NC1) acts like a natural tumor blocker by stopping blood vessels from growing into tumors by turning off key growth signals.

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The Molecular Interaction of Collagen with Cell Receptors for Biological Function

Narrative Review

This study talks generally about how collagen interacts with cells but doesn't mention the specific part of collagen (NC1 domain) or how it stops blood vessel growth in tumors, so it doesn't prove the claim.

Source Study

The Molecular Interaction of Collagen with Cell Receptors for Biological Function

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DOI: 10.3390/polym14050876

Similar Assertions

A specific protein on cell surfaces called α1β1 integrin sticks to certain types of collagen and tells cells to grow, make repair enzymes, and produce more collagen.

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When collagen binds to integrin α1β1, it starts a chain reaction inside the cell that makes cells grow and move, which is important for healing and tissue repair.

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