A role for hydrogen peroxide in the pro-apoptotic effects of photodynamic therapy.

abstract：:Light signals trigger precise changes in gene expression networks that activate distinctive developmental programs in plants. The transcriptome is shaped at different stages, both by the regulation of gene expression and also by posttranscriptional mechanisms that alter the sequence or abundance of the transcripts gen...

journal_title：Photochemistry and photobiology

authors： Hernando CE,Garcia C,Mateos JL

更新日期：2017-05-01 00:00:00

abstract：:Herbal extracts including asiatic acid (AA) have become popular candidates of anti-photoaging agents due to their anti-inflammatory and antioxidant properties and minimal side effect. Nevertheless, low bioavailability due to poor solubility limits their practical application. In this study, a highly bioavailable form ...

journal_title：Photochemistry and photobiology

authors： Huang J,Tu T,Wang W,Zhou G,Zhang W,Wu X,Liu W

更新日期：2020-01-01 00:00:00

abstract：:In this work, the changes in isoflavone levels and the expression of genes involved in their biosynthesis were studied in two Astragalus by UPLC-MS and real-time PCR after 10 days of UV-B treatment (λmax  = 313 nm, 804 J m-2 ). Isoflavones were significantly induced by UV-B irradiation. The influence might be activate...

journal_title：Photochemistry and photobiology

authors： Liu Y,Liu J,Wang Y,Abozeid A,Tian DM,Zhang XN,Tang ZH

更新日期：2018-01-01 00:00:00

abstract：:Absorbance changes were monitored from 250 to 650 nm during the first microsecond after photolysis of detergent suspensions of bovine rhodopsin at 20 degrees C. Global analysis of the resulting data produced difference spectra for bathorhodopsin, BSI and lumirhodopsin which give the change in absorbance of the aromati...

journal_title：Photochemistry and photobiology

authors： Lewis JW,Jäger S,Kliger DS

更新日期：1997-12-01 00:00:00

abstract：:The two-photon photolysis of liquid CCl4 with 25 ps pulses of 266 nm light has been studied and compared with similar studies with high energy radiation. Both neutral and ionic species are produced from excited states and ionization. The emphasis of the study is on the ionic processes, while some data related to excit...

journal_title：Photochemistry and photobiology

authors： Zhang G,Thomas JK

更新日期：2006-01-01 00:00:00

abstract：:Detergent solubilized bacteriorhodopsin (BR) proteins which contain alterations made by site-directed mutagenesis (Asp-96----Asn, D96N; Asp-85----Asn, D85N; and Arg-82----Gln, R82Q) have been studied with resonance Raman spectroscopy. Raman spectra of the light-adapted (BRLA) and M species in D96N are identical to tho...

journal_title：Photochemistry and photobiology

authors： Lin SW,Fodor SP,Miercke LJ,Shand RF,Betlach MC,Stroud RM,Mathies RA

更新日期：1991-03-01 00:00:00

abstract：:We report here preliminary pilot study data of the effect of sunless tanning spray with 9% [Correction added after online publication (August 24th, 2009): The concentration of Dihydroxyacetone used in the study was 9% and not 3% as previously stated] dihydroxyacetone (DHA) on 25-hydroxyvitamin D [25(OH)D] serum levels...

journal_title：Photochemistry and photobiology

authors： Armas LA,Fusaro RM,Sayre RM,Huerter CJ,Heaney RP

更新日期：2009-09-01 00:00:00

abstract：:Dark-grown leaves of maize (Zea mays), wheat (Triticum aestivum), wild-type pea (Pisum sativum) and its light-independent photomorphogenesis mutant (lip1) have different proportions of protochlorophyllide (Pchlide) forms as revealed by low-temperature fluorescence emission spectra. Four discrete spectral forms of Pchl...

journal_title：Photochemistry and photobiology

authors： Myśliwa-Kurdziel B,Amirjani MR,Strzałka K,Sundqvist C

更新日期：2003-08-01 00:00:00

abstract：:Photodynamic treatment of promyelocytic K562 cells in the presence of a monoglucosylporphyrin or hematoporphyrin leads to a sequence of events recognized as hallmarks of apoptosis: a drop in mitochondrial potential, concurrent with a drop in ATP level and a decrease in cell respiration, translocation of phosphatidylse...

journal_title：Photochemistry and photobiology

authors： Carré V,Jayat C,Granet R,Krausz P,Guilloton M

更新日期：1999-01-01 00:00:00

abstract：:We have studied the damage of alcohol dehydrogenase (ADH) and glyceraldehyde 3-phosphate dehydrogenase (GAPD) induced by Fe++/EDTA + H2O2 in combination with UV-A (main output at 365 nm). Enzyme inactivation, formation of hydroxyl radicals (measured in the absence of enzymes), increase in protein carbonyls, oxidation ...

journal_title：Photochemistry and photobiology

authors： Hu ML,Tappel AL

更新日期：1992-09-01 00:00:00

abstract：:This paper focuses on the estimation of the UV Index (UVI) for all sky conditions using a simple analytical parameterization involving three independent variables: the solar zenith angle, the total ozone column and the clearness index. Measurements of the UVI made at Badajoz and Cáceres (Southwestern Spain) from Janua...

journal_title：Photochemistry and photobiology

authors： Antón M,Serrano A,Cancillo ML,García JA,Madronich S

更新日期：2011-03-01 00:00:00

abstract：:The photophysical characteristics of two second-generation PDT photosensitizers, tin ethyl etiopurpurin I (SnET2) and tin octaethylbenzochlorin (SnOEBC), have been measured in homogeneous solution and when bound to bovine serum albumin (BSA). The ground state and triplet state absorption spectra have been characterize...

journal_title：Photochemistry and photobiology

authors： Pogue BW,Redmond RW,Trivedi N,Hasan T

更新日期：1998-12-01 00:00:00

abstract：:Collagen was exposed to an ultraviolet (UV) lamp that emitted predominantly in the UVB range. The cross-linking of collagen type I and type IV by UV irradiation was observed. Amino acid analyses revealed that Tyr residues in both collagen types I and IV were decreased by irradiation. In collagen type IV, losses of His...

journal_title：Photochemistry and photobiology

authors： Kato Y,Nishikawa T,Kawakishi S

更新日期：1995-04-01 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：: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：: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：:Direct irradiation of estrone aryl and methyl sulfonates in different organic solvents under nitrogen atmosphere was investigated under steady-state conditions. The estrone derivatives reacted efficiently through the photo-Fries rearrangement reaction involving [1;3]-sulfonyl migration providing the ortho-sulfonyl est...

journal_title：Photochemistry and photobiology

authors： Quindt MI,Gola GF,Ramirez JA,Bonesi SM

更新日期：2021-01-01 00:00:00

abstract：:Nowadays, introducing self-cleaning properties on various fabrics under daylight irradiation for automotive and upholstery application is in a central point of research. This can be achieved by application of metal-doped TiO2 nano particles on the textile fabrics. Here, alkali hydrolysis of polyester fabric has been c...

journal_title：Photochemistry and photobiology

authors： Gaminian H,Montazer M

更新日期：2015-09-01 00:00:00

abstract：:High-altitude Andean lakes (HAAL) are a treasure chest for microbiological research in South America. Their indigenous microbial communities are exposed to extremely high UV irradiation and to multiple chemical extremes (Arsenic, high salt content, alkalinity). Microbes are found both, free-living or associated into m...

journal_title：Photochemistry and photobiology

authors： Albarracín VH,Gärtner W,Farias ME

更新日期：2016-01-01 00:00:00

abstract：:We have compared the distributions of two stable UV photoproducts in nucleosome core DNA at the single-nucleotide level using a T4 polymerase-exonuclease mapping procedure. The distribution of pyrimidine-pyrimidone (6-4) dimers was uncovered by reversing the major UV photo-product, cis-syn cyclobutane pyrimidine dimer...

journal_title：Photochemistry and photobiology

authors： Gale JM,Smerdon MJ

更新日期：1990-04-01 00:00:00

abstract：:Several spectroscopic techniques (absorption, emission, transient absorption and differential scanning calorimetry--DSC) were used to investigate the deprotonation of dibucaine.HCl in a hydrophobic environment, and the interaction sites and mechanisms of the local anesthetic dibucaine.HCl on bacteriorhodopsin (bR) in ...

journal_title：Photochemistry and photobiology

authors： Lin CT,Chyan YG,Kresheck GC,Bitting HC Jr,el-Sayed MA

更新日期：1989-05-01 00:00:00

abstract：:Cis-urocanic acid (UCA), formed in the epidermis by UV irradiation of trans-UCA, has been implicated as a mediator of the immunosuppression induced by UV exposure of the skin. This review covers recent work in which the wavelength dependence of cis-UCA formation, the interaction of UCA isomers with DNA, the effects of...

journal_title：Photochemistry and photobiology

authors： Norval M,Gibbs NK,Gilmour J

更新日期：1995-08-01 00:00:00

abstract：:The photochemical reactions of the 1-deaza derivative of riboflavin (RF) have been studied by sub-ps time-resolved fluorescence spectroscopy. A potential effect of the solvent polarity and hydrogen bonding capability on the excited state (ES) dynamics was tested by measuring 1-deaza RF in water and, after acetylation ...

journal_title：Photochemistry and photobiology

authors： Slavov C,Mansurova M,Holzwarth AR,Gärtner W

更新日期：2010-01-01 00:00:00

abstract：:We have tested the hypothesis that exposure to ultraviolet light would inhibit T helper-1 (Th1) responses and stimulate T helper-2 (Th2) responses, and that thus in a mouse model of allergic (i.e. extrinsic) asthma (using ovalbumin [OVA] as the allergen) increased symptoms would be observed, while in a model of Th1-de...

journal_title：Photochemistry and photobiology

authors： Van Loveren H,Boonstra A,Van Dijk M,Fluitman A,Savelkoul HF,Garssen J

更新日期：2000-08-01 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：:The photochemistry of caged compounds of the o-nitrobenzyl type has been investigated thoroughly in the past. However, even recently new side reactions have been discovered. Earlier, we reported [Bley, F., K. Schaper, and H. Görner (2008), Photochem. Photobiol.84 162-171] that we found long-lived triplet states which ...

journal_title：Photochemistry and photobiology

authors： Schaper K,Etinski M,Fleig T

更新日期：2009-09-01 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：:We used GHz frequency-domain fluorometry to investigate the time-dependent intensity decays of N-acetyl-L-trytophanamide (NATA) when collisionally quenched by acrylamide in propylene glycol at 20 degrees C. The intensity decays of NATA became increasingly heterogeneous in the presence of acrylamide. The NATA intensity...

journal_title：Photochemistry and photobiology

authors： Lakowicz JR,Zelent B,Gryczynski I,Kuśba J,Johnson ML

更新日期：1994-09-01 00:00:00

abstract：:alpha-Crystallin, a major protein of the mammalian lens, plays a vital role in maintaining the structural stability and transparency of the lens. It performs this function through chaperone-like activity; it has recently been reported that heating alpha-crystallin enhances this ability. The present studies, using both...

journal_title：Photochemistry and photobiology

authors： Mandal K,Dillon J,Gaillard ER

更新日期：2000-04-01 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