Molecular changes during the photooxidation of alpha-crystallin in the presence of uroporphyrin.

abstract：:This study investigated the effects of low-level laser therapy (LLLT) in the liver function, structure and inflammation in a experimental model of carbon tetrachloride (CCl(4))-induced liver cirrhosis. Wistar rats were divided into Control, LLLT, CCl(4) and CCl(4) +LLLT groups. CCl(4) groups received CCl(4) (0.4 g kg(...

journal_title：Photochemistry and photobiology

authors： Oliveira-Junior MC,Monteiro AS,Leal-Junior EC,Munin E,Osório RA,Ribeiro W,Vieira RP

更新日期：2013-01-01 00:00:00

abstract：:The mutant T203V of the light driven chloride pump halorhodopsin from Halobacterium salinarum was crystallized and the X-ray structure was solved at 1.6 angstroms resolution. The T203V structure turned out to be nearly identical to the wild type protein with a root mean square deviation of 0.43 angstroms for the carbo...

journal_title：Photochemistry and photobiology

authors： Gmelin W,Zeth K,Efremov R,Heberle J,Tittor J,Oesterhelt D

更新日期：2007-03-01 00:00:00

abstract：:Biophysical and photobiological properties of a group of bacteriochlorins were compared with efficacy of these products for photodynamic therapy of murine tumors. Predictive factors for selective photosensitization in vivo include affinity binding to lipoproteins greater than albumin, extinction coefficient at the wav...

journal_title：Photochemistry and photobiology

authors： Kessel D,Smith KM,Pandey RK,Shiau FY,Henderson B

更新日期：1993-08-01 00:00:00

abstract：:We report the preparation of aminopropyl-functionalized magnesium phyllosilicate (Mg-organoclay) conjugated to fluorescein isothiocyanate (FITC) functionality (FITC-organoclay) by one-pot sol-gel synthesis. The physical characteristics of the Mg- and FITC-organoclays were examined by scanning electron microscopy (SEM)...

journal_title：Photochemistry and photobiology

authors： Lee YC,Lee TH,Han HK,Go WJ,Yang JW,Shin HJ

更新日期：2010-05-01 00:00:00

abstract：:In aqueous solution, amphiphilic ionenes such as the [3,22]-ionene spontaneously adopt globular conformations and form microdomains that are highly micelle-like, i.e. are capable of solubilizing organic molecules, binding and exchanging counterions and accelerating or inhibiting the rates of bimolecular reactions. Tim...

journal_title：Photochemistry and photobiology

authors： Tcacenco CM,Quina FH

更新日期：2007-05-01 00:00:00

abstract：:Solar light leads to thymine dimers that are mutagenic and primary cause of skin cancer. Here, we report absorption and synchrotron radiation circular dichroism (CD) spectra of Tn single strands with different number n of bases (n = 2-7, 10, 11) recorded after various 254 nm irradiation times. From a principal compone...

journal_title：Photochemistry and photobiology

authors： Baggesen LM,Hoffmann SV,Nielsen SB

更新日期：2014-01-01 00:00:00

abstract：:Action spectroscopy has a long history and is of central importance to photobiological studies. Action spectra were among the first assays to point to chlorophyll as the molecule most responsible for plant growth and to DNA as the genetic material. It is useful to construct action spectra early in the investigation of...

journal_title：Photochemistry and photobiology

authors： Coohill TP

更新日期：1991-11-01 00:00:00

abstract：:Novel water-soluble polymeric photosensitizers (SPO) based on starch and containing porphyrin chromophores were synthesized and studied. The polymers were soluble in water and in dimethyl sulfoxide. Photophysical studies and solubilization of molecular probes proved the formation of hydrophobic, rigid microdomains in ...

journal_title：Photochemistry and photobiology

authors： Nowakowska M,Sterzel M,Zapotoczny S

更新日期：2005-09-01 00:00:00

abstract：:Patients infected with human immunodeficiency virus (HIV) have a high prevalence of UV radiation-responsive skin diseases including psoriasis, pruritus, eosinophilic folliculitis and eczemas. On the other hand, UV has been shown to suppress T cell-mediated immune responses and to induce activation and replication of H...

journal_title：Photochemistry and photobiology

authors： Adams ML,Houpt KR,Cruz PD Jr

更新日期：1996-08-01 00:00:00

abstract：:In this manuscript, we demonstrate the control of film thickness and surface wettability in the photochemical immobilization of poly (vinyl alcohol) (PVA) to a self-assembled monolayer (SAM) containing a phthalimide chromophore. Surface attachment is characterized by ellipsometry and contact angle measurements. The we...

journal_title：Photochemistry and photobiology

authors： Carroll GT,Turro NJ,Mammana A,Koberstein JT

更新日期：2017-10-01 00:00:00

abstract：:Polyenic systems are involved in light perception of numerous living organisms. Although a π-conjugated backbone is a common feature of all polyenes, their photophysics may vary. We provide a comparative quantum mechanical study of low-lying S1 and S2 excited states in short (3-5 double bonds) symmetric all-trans line...

journal_title：Photochemistry and photobiology

authors： Dokukina I,Marian CM,Weingart O

更新日期：2017-11-01 00:00:00

abstract：:Synthesis of extracellular matrix (ECM) proteins and their degradation by matrix metalloproteinases (MMP) are part of the dermal remodeling resulting from chronic exposure of skin to ultraviolet radiation (UVR). We have compared two alternative mechanisms for these responses, namely, a direct mechanism in which UV-B o...

journal_title：Photochemistry and photobiology

authors： Kossodo S,Wong WR,Simon G,Kochevar IE

更新日期：2004-01-01 00:00:00

abstract：:Porous ZnS and ZnO nano-crystal films were fabricated via a three-step procedure. First, Zn(CH3 COO)2 /Silk Fibroin nanofiber mats were prepared by coaxial electrospinning. Second, Zn(CH3 COO)2 /Silk Fibroin mats were immersed in NaS solution to react with S2- to obtain ZnS/Silk Fibroin nanofiber mats. Finally, ZnO po...

journal_title：Photochemistry and photobiology

authors： Wang H,Liang L,Cheng X,Luo Y,Sun S

更新日期：2018-01-01 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：:Persister bacteria tolerate bactericidal antibiotics due to transient and reversible phenotypic changes. As these bacteria can limit the effectiveness of antibiotics to eradicate certain infections, their elimination is a relevant issue. Photodynamic therapy seems suitable for this purpose, but phenotypic tolerance to...

journal_title：Photochemistry and photobiology

authors： Oppezzo OJ,Forte Giacobone AF

更新日期：2018-01-01 00:00:00

abstract：:We previously reported that a low level of lysosomal photodamage potentiated the phototoxic effect of subsequent mitochondrial photodamage mediated by the benzoporphyrin derivative (BPD) in murine hepatoma 1c1c7 cells. This was attributed to release of Ca2+ from damaged lysosomes and a calpain-mediated conversion of t...

journal_title：Photochemistry and photobiology

authors： Kessel D,Reiners JJ Jr

更新日期：2017-11-01 00:00:00

abstract：:In the present work, we study the photodynamic action of cercosporin (cerco), a naturally occurring photosensitizer, on human cancer multicellular spheroids. U87 spheroids exhibit double the uptake of cerco than T47D and T98G spheroids as shown by flow cytometry on the single cell level. Moreover, cerco is efficiently...

journal_title：Photochemistry and photobiology

authors： Grigalavicius M,Mastrangelopoulou M,Arous D,Juzeniene A,Ménard M,Skarpen E,Berg K,Theodossiou TA

更新日期：2020-05-01 00:00:00

abstract：:Pyocyanin (PyO-) (1-hydroxy-5-methylphenazine) is a cytotoxic compound secreted by Pseudomonas aeruginosa, an omnipresent bacterium and a human pathogen. We report that visible light illumination in the presence of rose bengal, or riboflavin, in aerated solutions (pH 7.0-7.2) induces irreversible loss of the pigment's...

journal_title：Photochemistry and photobiology

authors： Reszka KJ,Denning GM,Britigan BE

更新日期：2006-03-01 00:00:00

abstract：:A novel Cs0.33 WO3 /LDHs (CWLDH) composite was synthesized by simple two steps solvothermal method and first investigated as the photocatalyst for tetracycline (TC) and Congo red (CR) degradation under visible light irradiation. The CWLDH heterostructures catalysts were characterized by XRD, UV-Vis, SEM, XPS and BET. ...

journal_title：Photochemistry and photobiology

authors： Zhang D,Ji T,Yu J,Jiang X,Jiao F

更新日期：2018-03-01 00:00:00

abstract：:Among beetle luciferases, the pH-sensitive firefly luciferases have been studied extensively. Much less is known about pH-insensitive luciferases, which include click beetle and railroad worm luciferases. Previously, we found that the residues R215 and T226 (N230) are important for green light emission. Here we show t...

journal_title：Photochemistry and photobiology

authors： Viviani VR,Uchida A,Viviani W,Ohmiya Y

更新日期：2002-11-01 00:00:00

abstract：:Tetracycline molecules offer several sites for peroxidative metabolism of the type known to lead to oxygen consumption and electronic excitation. Accordingly, when tetracycline and chlortetracycline were exposed to horseradish peroxidase in the presence of hydrogen peroxide, oxygen was taken up and light emission was ...

journal_title：Photochemistry and photobiology

authors： Gilio VE,Cilento G

更新日期：1993-09-01 00:00:00

abstract：:Recent developments in optical technologies have the potential to improve the speed and accuracy of screening and diagnosis of curable precancerous lesions and early cancer, thereby decreasing the costs of detection and management of epithelial malignancies. The development of molecular-specific contrast agents for ma...

journal_title：Photochemistry and photobiology

authors： Hsu ER,Anslyn EV,Dharmawardhane S,Alizadeh-Naderi R,Aaron JS,Sokolov KV,El-Naggar AK,Gillenwater AM,Richards-Kortum RR

更新日期：2004-03-01 00:00:00

abstract：:We have been able to identify a blue fluorophore from the low-molecular weight soluble fraction of human adult nondiabetic brunescent cataract lenses as xanthurenic acid 8-O-beta-D-glucoside (XA8OG) (excitation = 338 nm and emission = 440 nm). To determine the role of this fluorophore in the lens, we have examined its...

journal_title：Photochemistry and photobiology

authors： Thiagarajan G,Shirao E,Ando K,Inoue A,Balasubramanian D

更新日期：2002-09-01 00:00:00

abstract：:Quantum yields of firefly bioluminescence reactions were determined for beetle luciferases from the three main families of luminous beetles emitting different bioluminescence colors. Quantum yield (QY) was significantly correlated with luminescence spectrum. The green light-emitting luciferase of the Brazilian click b...

journal_title：Photochemistry and photobiology

authors： Niwa K,Ichino Y,Kumata S,Nakajima Y,Hiraishi Y,Kato D,Viviani VR,Ohmiya Y

更新日期：2010-09-01 00:00:00

abstract：:Photosensitizer-functionalized reduced graphene oxide (rGO) nanoparticles are promising materials for photodynamic therapy in cancer management. In this study, rGO is synthesized by a green route employing glucose as the reducing agent and functionalized with photosensitizer, protoporphyrin IX (PPIX) in a convenient, ...

journal_title：Photochemistry and photobiology

authors： Shuvra Smita S,Das A,Barui A

更新日期：2020-11-01 00:00:00

abstract：:A diffusible multitherapy resistance factor (MTRF) is produced by Cloudman S91 melanoma cells in vitro. The MTRF decreases sensitivity of the target cell line, S91/amel, to gamma-irradiation, UVC (200-280 nm) and mitomycin C (MMC). In the present study, we demonstrate that MTRF also increases the survival of S91/amel ...

journal_title：Photochemistry and photobiology

authors： Hill HZ,Hill GJ,Cieszka K,Azure M,Chowdhary I,Sayre RM

更新日期：1995-05-01 00:00:00

abstract：:We investigated the hypothesis that the strength of the activation of the intra-S DNA damage checkpoint varies within the S phase. Synchronized diploid human fibroblasts were exposed to either 0 or 2.5 J m(-2) UVC in early, mid- and late-S phase. The endpoints measured were the following: (1) radio-resistant DNA synth...

journal_title：Photochemistry and photobiology

authors： Chastain PD 2nd,Brylawski BP,Zhou YC,Rao S,Chu H,Ibrahim JG,Kaufmann WK,Cordeiro-Stone M

更新日期：2015-01-01 00:00:00

abstract：:Reactive nitrogen species, produced during the process of inflammation induced by various factors including UV radiation, modify amino acids in crucial proteins. It is assumed that skin tissue is more likely to be modified, as it is located at the outer layer of a body that is exposed to UV radiation on a daily basis....

journal_title：Photochemistry and photobiology

authors： Ishitsuka Y,Maniwa F,Koide C,Douzaki N,Kato Y,Nakamura Y,Osawa T

更新日期：2007-05-01 00:00:00

abstract：:Near-UV (337 nm) photoactivation of the 5-hydroxytryptophan decarboxylation reaction producing serotonin has been observed. The photoactivation effect was investigated as a function of fluence rate and fluence, and pH. Photoactivation of decarboxylase activity was found to occur at nearly neutral pH values (low activi...

journal_title：Photochemistry and photobiology

authors： Fraikin GY,Strakhovskaya MG,Ivanova EV,Rubin AB

更新日期：1989-04-01 00:00:00

abstract：:Using information on solar irradiance at different latitudes derived from a radiative transfer model and a detailed in vivo action spectrum for immune suppression in a murine system, we report here calculations of the "biologically effective" irradiance of sunlight for immune suppression. From 40 degrees N to 40 degre...

journal_title：Photochemistry and photobiology

authors： De Fabo EC,Noonan FP,Frederick JE

更新日期：1990-10-01 00:00:00