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Updated: Jun 25, 2026

Preparation of 3D Collagen Gels and Microchannels for the Study of 3D Interactions In Vivo
Published on: May 9, 2016
Thermal (in)stability of type I collagen fibrils
S G Gevorkian1, A E Allahverdyan, D S Gevorgyan
1Yerevan Physics Institute, Yerevan 375036, Armenia.
Abstract:
We measured the Young's modulus at temperatures ranging from 20 to 100 degrees C for a collagen fibril that is taken from a rat's tendon. The hydration change under heating and the damping decrement were measured as well. At physiological temperatures 25 to 45 degrees C, the Young's modulus decreases, which can be interpreted as an instability of the collagen. For temperatures between 45 and 80 degrees C, the Young's modulus first stabilizes and then increases when the temperature is increased. The hydrated water content and the damping decrement have strong maximums in the interval 70 to 80 degrees C indicating complex intermolecular structural changes in the fibril. All these effects disappear after heat-denaturation of the sample at 120 degrees C. Our main achievement is a five-stage mechanism by which the instability of a single collagen at physiological temperatures is compensated by the interaction between collagen molecules.
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