The changes in the content of mature crosslinks with pyridinoline structure and soluble/insoluble collagen ratio in the costal cartilage tissue of human beings aged from 1 month to 57 years were found to be age-dependent. The effect of the pyridinoline crosslink content on the soluble/insoluble collagen ratio in human costal cartilage tissue may constitute no less than 67% of the total influence of the sum of all factors. The pronounced nonlinearity of the studied dependencies points to a possible involvement of a factor(s) other than the pyridinoline crosslink content.
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