title: Responses of cultured smooth muscle cells from human nonatherosclerotic arteries and primary stenosing lesions after photoradiation: implications for photodynamic therapy of vascular stenoses.
abstract: Cultured smooth muscle cells from human nonatherosclerotic arteries and from primary stenosing lesions were labeled with dihematoporphyrinester and ether, a photosensitizing probe used mainly for the detection and photodynamic therapy of tumors. After labeling for 24 h, cells were irradiated with ultraviolet light (wavelength 365 nm, energy densities ranging from 30 to 1,200 mJ/cm2). Twenty-four hours after photoradiation, 80% of smooth muscle cells from nonatherosclerotic arteries and only 20% of smooth muscle cells from atherosclerotic plaques were viable and still adherent. Moreover, dynamic cell and cytoskeletal alterations in response to irradiation are described. The differential sensitivity of smooth muscle cells from nonatherosclerotic arteries and from atherosclerotic plaques provides evidence that a photodynamic treatment might be a valuable therapeutic approach to vascular stenosis.
authors.affiliation: Institute of Physiology I, University of Tübingen, Federal Republic of Germany.
authors.forename: P C
authors.initials: PC
authors.lastname: Dartsch
authors.forename: T
authors.initials: T
authors.lastname: Ischinger
authors.forename: E
authors.initials: E
authors.lastname: Betz
mesh_terms: D001161:Arteriosclerosis / Q000188:drug therapy* / Q000473:pathology; D002470:Cell Survival / Q000187:drug effects / Q000528:radiation effects; D002478:Cells, Cultured; D003251:Constriction, Pathologic / Q000473:pathology; D006414:Hematoporphyrin Photoradiation; D006801:Humans; D009131:Muscle, Smooth, Vascular / Q000187:drug effects* / Q000473:pathology / Q000528:radiation effects; D010778:Photochemotherapy; D012016:Reference Values