The Journal of Bone and Joint Surgery, Vol 59, Issue 2 209-212, Copyright © 1977 by Journal of Bone and Joint Surgery, Inc
The urinary excretion of collagen degradation products by quadriplegic patients and during weightlessness
J Claus-Walker, J Singh, CS Leach, DV Hatton, CW Hubert and N Di Ferrante
Urinary total hydroxyproline, peptide-bound hydroxyproline, hydroxylysine
glycosides, and calcium were measured in three healthy individuals
subjected to weightlessness for eighty-four days and in three young
quadriplegic patients. The former group had significant calciuria but no
evidence of collagen degradation. The latter group, however, had
conspicuous calciuria and also excreted large amounts of collagen breakdown
products. This documented degradation of matrix may be related to the
continuous calciuria, osteoporosis, and cutaneous dystrophic changes
occurring in quadriplegics.