Photocytotoxicity of water-soluble metalloporphyrin derivatives.

abstract：:The retina and retinal pigment epithelium contain a number of retinoids in a metabolic pathway that eventually forms the visual pigments. This study investigates the photochemistry of those retinoids that may contribute to light-induced damage to the retina. These include retinal (RAL), retinol (ROL), retinylpalmitate...

journal_title：Photochemistry and photobiology

authors： Dillon J,Gaillard ER,Bilski P,Chignell CF,Reszka KJ

更新日期：1996-05-01 00:00:00

abstract：:The UVA and UVB components of sunlight can produce three classes of bipyrimidine DNA photolesions [cyclobutane pyrimidine dimers (CPDs), pyrimidine (6-4) pyrimidone photoproducts (6-4PPs) and related Dewar valence isomers (DewarPPs)]. The UVA/UVB ratio of sunlight is high in winter and low in summer in the Northern He...

journal_title：Photochemistry and photobiology

authors： Nishimura K,Ikehata H,Douki T,Cadet J,Sugiura S,Mori T

更新日期：2020-12-03 00:00:00

abstract：:As our understanding of the role of UV in causing skin cancer continues to expand, researchers and clinicians must continue to remain up to date on the various means by which UV exposure can be quantified. The purpose of this article was to review the current methods used to measure lifetime exposure to UV and to summ...

journal_title：Photochemistry and photobiology

authors： Worswick SD,Cockburn M,Peng D

更新日期：2008-11-01 00:00:00

abstract：:Two-photon laser scanning microscopy (TPLSM) of endogenous reduced nicotinamide adenine dinucleotide (NAD(P)H) provides important information regarding the cellular metabolic state. When imaging the punctate mitochondrial fluorescence originating from NAD(P)H in a rat basophilic leukemia (RBL) cell at low laser powers...

journal_title：Photochemistry and photobiology

authors： Nichols MG,Barth EE,Nichols JA

更新日期：2005-03-01 00:00:00

abstract：:Intermolecular interactions of human serum proteins with a hydrophilic nonmetalloporphyrin, 13,17-bis(1-carboxypropionyl)carbomoylethyl-8-ethenyl-2-hydroxy-3-hydroxyiminoethylidene-2,7,12,18-tetramethylporphyrin sodium salt (ATX-S10 (Na)), or a hydrophilic gallium-metalloporphyrin, diethylenetriamine pentaacetic acid ...

journal_title：Photochemistry and photobiology

authors： Yamaguchi M,Tanabe S,Nakajima S,Takemura T,Ogita K,Kuwayama H,Sakata I,Miyaki S,Suzuki K,Namiki H,Uzuka Y,Sarashina T

更新日期：2004-09-01 00:00:00

abstract：:The pharmacokinetics of Zn phthalocyanine (ZnPc) encapsulated in dipalmitoyl-phosphatidylcholine (DPPC) liposomes, injected intravenously in Skh:HR-1 nude mice, was monitored by two in vitro techniques and one in vivo technique, all based on fluorescence spectroscopy. The in vitro methods involve either fluorescence m...

journal_title：Photochemistry and photobiology

authors： Biolo R,Jori G,Kennedy JC,Nadeau P,Pottier R,Reddi E,Weagle G

更新日期：1991-01-01 00:00:00

abstract：:Positively charged zinc containing or metal free phthalocyanines 6a-c and 7a-c were prepared via a three step procedure starting from 4-nitrophthalonitrile. The phthalocyanines contain alkyl chains of different length in order to influence the hydrophilic vs lipophilic character of the compounds. The partition between...

journal_title：Photochemistry and photobiology

authors： Wöhrle D,Iskander N,Graschew G,Sinn H,Friedrich EA,Maier-Borst W,Stern J,Schlag P

更新日期：1990-03-01 00:00:00

abstract：:When Escherichia coli cells were irradiated by UVA in the presence of 6-mercaptopurine (6-MP) or 2-thiouracil (S2Ura), two kinds of repair-deficient strains of recA- and uvrA- were killed more efficiently than the parental wild-type strain having normal repair capacities. In addition, these agents with UVA exposure gr...

journal_title：Photochemistry and photobiology

authors： Komeda K,Iwamoto S,Kominami S,Ohnishi T

更新日期：1997-01-01 00:00:00

abstract：:Photocatalytic degradation of methyl orange (MO) as a model of an organic pollution was accomplished with magnetic and porous TiO(2)/ZnO/Fe(3)O(4)/PANI and ZnO/Fe(3)O(4)/PANI nanocomposites under visible light irradiation. The structures of nanocomposites were characterized by various techniques including UV-Vis absor...

journal_title：Photochemistry and photobiology

authors： Nabid MR,Sedghi R,Gholami S,Oskooie HA,Heravi MM

更新日期：2013-01-01 00:00:00

abstract：:High intensity two-photon picosecond excitation at 266 nm (effective energy 9.2 eV) has been shown to cause efficient photolysis of thymine in aqueous solution. Experimental results for the quantum yield of solvated electrons, phi (eaq-), and the net consumption of thymine, phi(-Thy) have been interpreted (Oraevsky an...

journal_title：Photochemistry and photobiology

authors： Daniels M

更新日期：1991-07-01 00:00:00

abstract：:A series of luminescent ion exchanged zeolite are synthesized by introducing various ions into NaY zeolite. Monometal ion (Eu(3+), Tb(3+), Ce(3+), Y(3+), Zn(2+), Cd(2+), Cu(2+)) exchanged zeolite, rare-earth ion (Eu(3+), Tb(3+), Ce(3+)) exchanged zeolite modified with Y(3+) and rare-earth ion (Eu(3+), Tb(3+), Ce(3+)) ...

journal_title：Photochemistry and photobiology

authors： Duan TW,Yan B

更新日期：2014-05-01 00:00:00

abstract：:A 2-year field study on the effect of different light environments, obtained by using cladding materials (polyethylene films and shade net) able to cut off specific regions of the photosynthetically active radiation and ultraviolet wavebands, on the growth and phenylpropanoids content of Achillea collina grown in the ...

journal_title：Photochemistry and photobiology

authors： Giorgi A,Manzo A,Vagge I,Panseri S

更新日期：2014-01-01 00:00:00

abstract：:UVB radiation contributes to both direct and indirect damage to the skin including the generation of free radicals and reactive oxygen species (ROS), inflammatory responses, immunosuppression and gene mutations, which can ultimately lead to photocarcinogenesis. A plant-derived flavonoid, baicalin, has been shown to ha...

journal_title：Photochemistry and photobiology

authors： Min W,Ahmad I,Chang ME,Burns EM,Qian Q,Yusuf N

更新日期：2015-11-01 00:00:00

abstract：:Chronic exposure of the gray, short-tailed oppossum, Monodelphis domestica to ultraviolet radiation (UVR) induces mesenchymal tumors of the cornea. High molecular weight DNA samples from 6 UVR-induced corneal tumors were assayed for their ability to transform NIH 3T3 cells to tumorigenicity. NIH 3T3 cells transfected ...

journal_title：Photochemistry and photobiology

authors： Sabourin CL,Freeman AG,Kusewitt DF,Ley RD

更新日期：1992-03-01 00:00:00

abstract：:The quantum yield, phi ZE, for configurational photoisomerization (4Z,15Z----4Z,15E) of bilirubin bound non-covalently to human serum albumin was determined (at 23 +/- 2 degrees C) by laser excitation and chromatographic analysis of products. Values obtained for photoexcitation at 465 nm were about one-half those prev...

journal_title：Photochemistry and photobiology

authors： Agati G,Fusi F,Pratesi R,McDonagh AF

更新日期：1992-02-01 00:00:00

abstract：:Neutrophils stimulated with formyl-methionyl-leucyl-phenylalanine (fMLP) or leukotriene B4 (LTB4) generated kinetically distinctive luminol augmented chemiluminescence (LCL). Inhibitors of .O2- [superoxide-dismutase (SOD) or tiron], H2O2 (catalase), myeloperoxidase, MPO, (NaN3), HOCl (taurine) and .OH (mannitol) hampe...

journal_title：Photochemistry and photobiology

authors： Gyllenhammar H

更新日期：1989-02-01 00:00:00

abstract：:alpha-Terthienyl photosensitizes single strand breaks in pBR322 DNA. Almost identical results were observed under oxygen and under argon. In the presence of oxygen, this DNA nicking was enhanced by histidine and was not affected by superoxide dismutase, catalase, or the antioxidant BHT. Although chemical damage to DNA...

journal_title：Photochemistry and photobiology

authors： Wang TP,Kagan J,Tuveson RW,Wang GR

更新日期：1991-04-01 00:00:00

abstract：:The present work is aimed to synthesize CdTe/ZnSe core/shell quantum dots (QDs) in an easy way and to explore the possibilities of its application in in vitro imaging of chicken tissue and embryo. The QDs were prepared using microwave irradiation with different temperatures, which is a very easy and less time-consumin...

journal_title：Photochemistry and photobiology

authors： Moulick A,Blazkova I,Milosavljevic V,Fohlerova Z,Hubalek J,Kopel P,Vaculovicova M,Adam V,Kizek R

更新日期：2015-03-01 00:00:00

abstract：:This article is a highlight of the study by Stamenkovic and Hanelt in this issue of Photochemistry and Photobiology describing the high-irradiance photophysiology of several strains of freshwater chlorophyte microalgal genus, Cosmarium. These strains exhibit distinct differences in how combined thermal- high irradianc...

journal_title：Photochemistry and photobiology

authors： Neale P

更新日期：2013-07-01 00:00:00

abstract：:Under continuous photolysis at 675 nm, liposomal zinc phthalocyanine associated with nitrosyl ruthenium complex [Ru(NH.NHq)(tpy)NO](3+) showed the detection and quantification of nitric oxide (NO) and singlet oxygen ((1)O(2)) release. Photophysical and photochemical results demonstrated that the interaction between th...

journal_title：Photochemistry and photobiology

authors： Maranho DS,de Lima RG,Primo FL,da Silva RS,Tedesco AC

更新日期：2009-05-01 00:00:00

abstract：:Systemic injection of hematoporphyrin derivative (HpD) in contribution with visible light (red or blue-green) delivered by laser was used to treat a patient with psoriasis. The psoriatic lesions responded vigorously to laser treatments, forming eschars by 1 week post irradiation. In contrast, only minimal erythema was...

journal_title：Photochemistry and photobiology

authors： McCullough JL,Weinstein GD,Douglas JL,Berns MW

更新日期：1987-07-01 00:00:00

abstract：:Angelica archangelia (AA), a traditional herb, has attracted attention as an agent with potential for use in the prevention of chronic skin diseases. This study examined the photoprotective effects of AA on the inhibition of matrix metalloproteinases (MMPs) and collagen degradation in UVB-irradiated normal human derma...

journal_title：Photochemistry and photobiology

authors： Sun Z,Hwang E,Park SY,Zhang M,Gao W,Lin P,Yi TH

更新日期：2016-07-01 00:00:00

abstract：:A targeting strategy based on the selective enzyme-mediated activation of polymeric photosensitizer prodrugs (PPP) within pathological tissue has led to the development of agents with the dual ability to detect and treat cancer. Herein, a detailed study of a simple model system for these prodrugs is described. We prep...

journal_title：Photochemistry and photobiology

authors： Campo MA,Gabriel D,Kucera P,Gurny R,Lange N

更新日期：2007-07-01 00:00:00

abstract：:Chlorprothixene (CPTX, Taractan) is a low potency antipsychotic mainly used for the treatment of psychotic disorders (e.g. schizophrenia) and acute mania occurring as part of bipolar disorders. As in the case of other numerous drugs used in the treatment of psychiatric disorders, CPTX presents geometric isomerism. The...

journal_title：Photochemistry and photobiology

authors： Piñero LE,García C,Lhiaubet-Vallet V,Oyola R,Miranda MA

更新日期：2009-07-01 00:00:00

abstract：:In eukaryotic cells helix-distorting DNA lesions like cyclobutane pyrimidine dimers (CPDs) and 6-4 pyrimidine-pyrimidone photoproducts (6-4 PPs) are efficiently removed by nucleotide excision repair (NER). NER is a multistep process where in the end, subsequent to replication over the gap, the remaining nick is sealed...

journal_title：Photochemistry and photobiology

authors： Paul-Konietzko K,Thomale J,Arakawa H,Iliakis G

更新日期：2015-09-01 00:00:00

abstract：:This study compares the abilities of the glutathione (GSH) and thioredoxin (Trx) antioxidant systems in defending cultured human lens epithelial cells (LECs) against UVA light. Levels of GSH were depleted with either L-buthionine-(S,R)-sulfoximine (BSO) or 1-chloro-2,4-dinitrobenzene (CDNB). CDNB treatment also inhibi...

journal_title：Photochemistry and photobiology

authors： Padgaonkar VA,Leverenz VR,Bhat AV,Pelliccia SE,Giblin FJ

更新日期：2015-03-01 00:00:00

abstract：:The crystal and molecular structure of the title compound 4 have been determined by single crystal X-ray crystallography. The structure shows the typical S4-ruffled conformation observed for Ni(II) tetrapyrroles. Compared to the structure of the methyl ester of (13(2)-demethoxycarbonyl-pheophorbidato a)nickel(II), 4 s...

journal_title：Photochemistry and photobiology

authors： Senge MO,Smith KM

更新日期：1994-08-01 00:00:00

abstract：:This research examines the behavior of ground-level solar UV radiation as measured by eight broadband meters in the continental United States during the period from late 1994 to late 1998. The goal is to define the variability that occurs in UV irradiance over time scales ranging from one to several years. The monthly...

journal_title：Photochemistry and photobiology

authors： Frederick JE,Slusser JR,Bigelow DS

更新日期：2000-10-01 00:00:00

abstract：:Liposomes were prepared from mixtures of dipalmitoyl-L-alpha-phosphatidylcholine and up to 40% mol:mol of N-stearoyl-L-histidine (NSH) in the presence of the hydrophobic sensitizer DHE. In the dark such liposomes are stable and retain entrapped salts. On photolysis with visible light, liposomes leak trapped ions at NS...

journal_title：Photochemistry and photobiology

authors： Chowdhary RK,Green CA,Morgan CG

更新日期：1993-09-01 00:00:00

abstract：:The C-40 xanthophylls zeaxanthin and astaxanthin were confirmed to form radical cations, Car.+, in the electron-accepting solvent chloroform by direct excitation using subpicosecond time-resolved absorption spectroscopy in combination with spectroelectrochemical determination of the near-infrared absorption of Car.+. ...

journal_title：Photochemistry and photobiology

authors： Han RM,Tian YX,Wu YS,Wang P,Ai XC,Zhang JP,Skibsted LH

更新日期：2006-03-01 00:00:00