Wound contraction in experimental lathyrism.

Lathyrism, which affects developing connective tissue, is produced by extracts of sweet-pea seeds (Lathyrus odoratus) and by various amino-nitriles. The basic lesion is a defect in the intra- and inter-molecular bonding of collagen, as a result of which wound tensile strength is diminished. Wounds involving skin loss in rats heal largely by a process known as contraction, in which the skin edges are brought together, leaving only a small defect to be closed by the migrating epithelium. Here, it has been found that a lathyrogenic agent (β-aminopropionitrile) has no effect on wound contraction and the implications of this are discussed. The result suggests that tensile strength and contraction reflect different aspects of healing.