title: [Effect of laser irradiation on collagen production by fibroblasts in vitro].
abstract: The effects of the low power laser irradiation (Space Mix 5 Mid Laser) on the 3H-proline incorporation in the collagenic proteins produced by two lines of normal human fibroblasts in vitro were studied. The 3H-thymidine incorporation in cultures of control and irradiated fibroblasts of the same lines was also evaluated. The obtained results show that in the experimental conditions considered, laser irradiation may have a positive effect on the production of collagen by the fibroblasts in vitro. This effect is dependent on the time of exposure, the frequency of infra-red impulses and the age of subjects from which fibroblasts were obtained. The laser irradiation in the same experimental conditions does not affect the incorporation of 3H-thymidine in the fibroblasts in vitro. Therefore, the observed increase of collagen production is not dependent on an increase of cellular population.
mesh_terms: D000368:Aged; D002478:Cells, Cultured; D003094:Collagen / Q000096:biosynthesis*; D005347:Fibroblasts / Q000378:metabolism / Q000528:radiation effects*; D006801:Humans; D007834:Lasers; D008875:Middle Aged; D011392:Proline / Q000378:metabolism
chemical_list: D003094:Collagen; D011392:Proline
vernacular_title: Effets de l'irradiation laser sur la production de collagène par les fibroblastes in vitro.