title: Isolation and photodynamic effects of hematoporphyrin derivative components: a chromatographic analysis of the starting materials.
abstract: Twenty different fractions of hematoporphyrin derivatives (HpD) and eight fractions of an HpD dimer mixture were isolated utilizing isocratic reversed-phase ion-pair high-performance liquid chromatography. These fractions were characterized by UV-visible and fluorescence spectrophotometry. Fluorescence quantum yields and photokill efficiency for each fraction in PTK2 epithelial cells were obtained. Results indicate that some part of the photoactivity exhibited by HpD may be due to impurities present in the HpD starting material, hematoporphyrin-IX dihydrochloride, depending on its source. It was also found that hematoporphyrin D, a commercial acetylated product formed during synthesis of HpD, contained a higher percentage of monomers than would be expected.
authors.affiliation: Health Research Center, Southern University, Baton Rouge, LA 70813, USA.
authors.forename: J W
authors.initials: JW
authors.lastname: Owens
authors.forename: L
authors.initials: L
authors.lastname: Yang
authors.forename: G
authors.initials: G
authors.lastname: Adeola
authors.forename: M
authors.initials: M
authors.lastname: Robins
authors.forename: R
authors.initials: R
authors.lastname: Smith
authors.forename: R
authors.initials: R
authors.lastname: Robinson
authors.forename: N
authors.initials: N
authors.lastname: Elayan
authors.forename: L
authors.initials: L
authors.lastname: McMahon
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000737:chemistry* / Q000494:pharmacology; D002470:Cell Survival / Q000187:drug effects; D002478:Cells, Cultured; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D017324:Hematoporphyrin Derivative / Q000737:chemistry* / Q000494:pharmacology; D007614:Macropodidae; D010778:Photochemotherapy; D017319:Photosensitizing Agents / Q000737:chemistry* / Q000494:pharmacology; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet
chemical_list: D000970:Antineoplastic Agents; D017319:Photosensitizing Agents; D017324:Hematoporphyrin Derivative