NF-κB is not directly responsible for photoresistance induced by fractionated light delivery in HT-29 colon adenocarcinoma cells.

abstract：:Using normal, untransformed, human fibroblasts, the effectiveness of aminolevulinic (ALA)-mediated photodynamic therapy (PDT) was investigated in terms of both clonogenic survival and DNA damage. The response of normal fibroblasts was then compared with Gorlin syndrome-derived fibroblasts (basal cell nevus syndrome [B...

journal_title：Photochemistry and photobiology

authors： Haylett AK,Ward TH,Moore JV

更新日期：2003-10-01 00:00:00

abstract：:Ring-fused retinal analogs were designed to examine the hula-twist mode of the photoisomerization of the 9-cis retinylidene chromophore. Two 9-cis retinal analogs, the C11-C13 five-membered ring-fused and the C12-C14 five-membered ring-fused retinal derivatives, formed the pigments with opsin. The C11-C13 ring-fused a...

journal_title：Photochemistry and photobiology

authors： Hirano T,Lim IT,Kim DM,Zheng XG,Yoshihara K,Oyama Y,Imai H,Shichida Y,Ishiguro M

更新日期：2002-12-01 00:00:00

abstract：:SV40 DNA was irradiated in vitro and in vivo with UV-C (240-280 nm) and UV-B (280-320 nm) light, and damaged sites sensitive to digestion with Escherichia coli endonuclease III (endo III) and bacteriophage T4 endonuclease V (endo V) were quantified. The frequency of endo III-sensitive sites (primarily cytosine photohy...

journal_title：Photochemistry and photobiology

authors： Mitchell DL,Jen J,Cleaver JE

更新日期：1991-11-01 00:00:00

abstract：:Photodynamic therapy (PDT) uses laser light to activate a photosensitizer that has been absorbed preferentially by cancer cells after systemic administration. A phototoxic reaction ensues resulting in cell death and tissue necrosis. Some cells, however, may survive PDT. This study was performed to determine if survivi...

journal_title：Photochemistry and photobiology

authors： Hornung R,Walt H,Crompton NE,Keefe KA,Jentsch B,Perewusnyk G,Haller U,Köchli OR

更新日期：1998-10-01 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 interaction with amino acids of the excited states of the N-oxide resazurin and its deoxygenation product resorufin, has been studied in aqueous solution at pH 7.5. Steady-state and time-resolved studies show that the fluorescence is quenched by amino acids. Complexation of the dyes in the ground state with aromat...

journal_title：Photochemistry and photobiology

authors： Villegas ML,Bertolotti SG,Previtali CM,Encinas MV

更新日期：2005-07-01 00:00:00

abstract：:A polyclonal, multispecific antiserum was raised against a whole 3[(3-cholamidopropyl)-dimethylammonio]-1-propanesulfonate-extract of nonirradiated Blepharisma japonicum cells. It was used to reveal the composition of solutions that were hypothesized to contain the photoreceptor of the ciliate. A Bio-Gel A 1.5 m fine ...

journal_title：Photochemistry and photobiology

authors： Podestà A,Gioffré D,Grossi T,Montagnoli G

更新日期：2000-05-01 00:00:00

abstract：:Copper(II), in the presence of UV-B radiation (280-315 nm), can generate single-strand breaks in the sugar-phosphate backbone of pBR322 plasmid DNA. A low level of single-strand backbone breaks occurs in the presence of Cu(II) alone, but UV-B irradiation increases the rate by the more than 100-fold. Concomitant with t...

journal_title：Photochemistry and photobiology

authors： Lloyd RE,Larson RA,Adair TL,Tuveson RW

更新日期：1993-06-01 00:00:00

abstract：:As the most important interface between human body and external environment, skin acts as an essential barrier preventing various environmental damages, among which DNA-damaging UV radiation from the sun remains the major environmental risk factor causing various skin diseases. It has been well documented that wavelen...

journal_title：Photochemistry and photobiology

authors： Liu H,Yue J,Lei Q,Gou X,Chen SY,He YY,Wu X

更新日期：2015-07-01 00:00:00

abstract：:Photodynamic therapy (PDT) of cancer induces oxidative stress, which intervenes in the expression of cytokines by tumor cells. The cytokines might have either a positive or a negative impact on tumor eradication. Here, we studied the expression of cytokines vascular endothelial growth factor (VEGF) and interleukin-1al...

journal_title：Photochemistry and photobiology

authors： Dabkeviciene D,Sasnauskiene A,Leman E,Kvietkauskaite R,Daugelaviciene N,Stankevicius V,Jurgelevicius V,Juodka B,Kirveliene V

更新日期：2012-03-01 00:00:00

abstract：:Abstract- Time-resolved transmittance was used to extract in vivo optical properties of leaves of green plants experimentally. In time-resolved transmittance measurements an ultrashort light pulse is directed onto the surface of the object and the transmitted light is measured with a time resolution in the range of pi...

journal_title：Photochemistry and photobiology

authors： Johansson J,Berg R,Pifferi A,Svanberg S,Björn LO

更新日期：1999-02-01 00:00:00

abstract：:Topical photodynamic therapy is used for a variety of malignant and pre-malignant skin disorders, including Bowen's Disease and Superficial Basal Cell Carcinoma. A haem precursor, typically 5-aminolevulinic acid (ALA), acting as a prodrug, is absorbed and converted by the haem biosynthetic pathway to photoactive proto...

journal_title：Photochemistry and photobiology

authors： Donnelly RF,McCarron PA,Woolfson AD

更新日期：2005-07-01 00:00:00

abstract：:The infrared spectrum of monomeric unsubstituted coumarin (C9H6O2; 2H-1-benzopyran-2-one), isolated in solid argon at 10 K is presented and assigned. The UV-induced (lambda>200 nm) unimolecular photochemistry of the matrix-isolated compound was studied experimentally. Three main photoreactions were observed: (a) decar...

journal_title：Photochemistry and photobiology

authors： Kuş N,Breda S,Reva I,Tasal E,Ogretir C,Fausto R

更新日期：2007-09-01 00:00:00

abstract：:Singlet oxygen reacts preferentially with three amino acids in proteins, His, Trp and Met. In order to study the specific molecular events that result from such oxidations, calf alpha-crystallin was photooxidized in the presence of uroporphyrin and the reactions were investigated by high performance liquid chromatogra...

journal_title：Photochemistry and photobiology

authors： Dillon J,Chiesa R,Wang RH,McDermott M

更新日期：1993-03-01 00:00:00

abstract：:Although allergic rhinitis is not life threatening, it significantly influences the quality of a patient's life. This study is intended to evaluate the safety and efficacy of phototherapy with low-level energy of a 650 nm laser irradiation system in perennial allergic rhinitis patients. This clinical trial was an open...

journal_title：Photochemistry and photobiology

authors： Lee HM,Park MS,Park IH,Lee SH,Lee SK,Kim KS,Choi H

更新日期：2013-05-01 00:00:00

abstract：:It has been proposed that photodegradation of folates may be the reason for the pigmentation of races living under high fluence rates of ultraviolet radiation. The photodegradation of folic acid (FA) induced by ultraviolet-A (UV-A) radiation, in solution and in the presence of human serum albumin (HSA), was studied wi...

journal_title：Photochemistry and photobiology

authors： Vorobey P,Steindal AE,Off MK,Vorobey A,Moan J

更新日期：2006-05-01 00:00:00

abstract：:Antifungal activity is positively correlated to furanocoumarin content in extracts of the traditional phytomedicine northern prickly ash (Zanthoxylum americanum Mill. [Rutaceae]). The specificity of these furanocoumarins in inhibiting replication of DNA was investigated with reference to significant base composition d...

journal_title：Photochemistry and photobiology

authors： Smith ML,Gregory P,Bafi-Yeboa NF,Arnason JT

更新日期：2004-06-01 00:00:00

abstract：:The Photochemical Research Group from San Luis (Argentina) highlights the contributions of Dr. Norman Andino García to the development of the group as a way to show him our gratitude for all his support. ...

journal_title：Photochemistry and photobiology

authors： Ferrari G,Montaña MP

更新日期：2018-11-01 00:00:00

abstract：:In studies of the biological effects of UV radiation, ozone depletion can be mimicked by performing the study under ambient conditions and adding radiation with UV-B lamps. We evaluated this methodology at three different locations along a latitudinal gradient: Rimouski (Canada), Ubatuba (Brazil) and Ushuaia (Argentin...

journal_title：Photochemistry and photobiology

authors： Díaz S,Camilión C,Escobar J,Deferrari G,Roy S,Lacoste K,Demers S,Belzile C,Ferreyra G,Gianesella S,Gosselin M,Nozais C,Pelletier E,Schloss I,Vernet M

更新日期：2006-07-01 00:00:00

abstract：:After 50 years of studies on photobiomodulation (PBM), there is still so much to investigate to understand the laser light-nonplant cells interactions. The current scientific knowledge allows to say that the phenomena induced by PBM are based on cellular pathways that are the key points of cell life. The mitochondria ...

journal_title：Photochemistry and photobiology

authors： Amaroli A,Ferrando S,Benedicenti S

更新日期：2019-01-01 00:00:00

abstract：:The temperature dependence of the uptake phase of 5-aminolevulinic acid (ALA) and the following production phase of protoporphyrin IX (PpIX) in normal mouse skin was investigated. A cream containing 20% ALA was topically applied on the skin for 10 min. The amount of ALA-induced PpIX was evaluated by measuring the fluo...

journal_title：Photochemistry and photobiology

authors： Juzenas P,Sørensen R,Iani V,Moan J

更新日期：1999-04-01 00:00:00

abstract：:Exposure of cultured MRC5 human fibroblasts or NCTC 2544 human keratinocytes to mild doses of ultraviolet A (UVA: 320-400 nm) radiations markedly decreased the actin reactivity with fluorescein-labeled phalloidin. This indicates a change in the degree of polymerization of actin and thus in the organization of actin fi...

journal_title：Photochemistry and photobiology

authors： Djavaheri-Mergny M,Pieraggi MT,Mazière C,Santus R,Lageron A,Salvayre R,Dubertret L,Mazière JC

更新日期：1994-01-01 00:00:00

abstract：:A novel antibody-fluorescence method has been developed to elucidate the chromophore topography in phytochrome as it undergoes a photochromic transformation. Förster energy transfer from N-terminal bound, fluorescently labeled Oat-25 Fab antibody fragments to the phytochrome chromophore was measured. The results sugge...

journal_title：Photochemistry and photobiology

authors： Farrens DL,Cordonnier MM,Pratt LH,Song PS

更新日期：1992-11-01 00:00:00

abstract：:Syntheses for the new photosensitizers HOSiPcOSi(CH3)2(CH2)3N(CH1)1 or 3(CH3)2, Pc 34 and Pc 25, have been developed and the order of activity of these photosensitizers and the previously reported photosensitizer Pc 4, HOSiPcOSi(CH3)2(CH2)3N(CH3)2, in the dark and with broad-band red light toward Plasmodium falciparum...

journal_title：Photochemistry and photobiology

authors： Zhao XJ,Lustigman S,Li YS,Kenney ME,Ben-Hur E

更新日期：1997-08-01 00:00:00

abstract：:People can get oral cancers from UV (290-400 nm) exposures. Besides high outdoor UV exposures, high indoor UV exposures to oral tissues can occur when consumers use UV-emitting tanning devices to either tan or whiten their teeth. We compared the carcinogenic risks of skin to oral tissue cells after UVB (290-320 nm) ex...

journal_title：Photochemistry and photobiology

authors： Breger J,Baeva L,Agrawal A,Shindell E,Godar DE

更新日期：2013-05-01 00:00:00

abstract：:The size of excision repair patches corresponding to excision of (6-4) pyrimidine-pyrimidone photoproducts and (5-5, 6-6) cyclobutane dimers have been independently determined by using bromodeoxyuridine substitution and density increases in isopycnic gradients of small DNA fragments. The two classes of photoproducts w...

journal_title：Photochemistry and photobiology

authors： Cleaver JE,Jen J,Charles WC,Mitchell DL

更新日期：1991-09-01 00:00:00

abstract：:Near-ultraviolet light (UVA: 320-400 nm) constitutes a major part of sunlight UV. It is important to know the effect of UVA on the biological activities of organisms on the earth. We have previously reported that black light induces somatic-cell mutation in Drosophila larvae. To investigate which wavelength of the UVA...

journal_title：Photochemistry and photobiology

authors： Negishi T,Nagaoka C,Hayatsu H,Suzuki K,Hara T,Kubota M,Watanabe M,Hieda K

更新日期：2001-05-01 00:00:00

abstract：:Photoautotrophic growth of Chlamydomonas reinhardtii was shown to be independent of the presence of atmospheric oxygen. Under constant light and photoautotrophic conditions, C. reinhardtii grew equally well in either air or 367 PPM CO2-in-He. During 12-h light-dark cycles, the cells in air grew substantially faster th...

journal_title：Photochemistry and photobiology

authors： Graves DA,Spradlin GM,Greenbaum E

更新日期：1990-09-01 00:00:00

abstract：:Ultraviolet-A irradiation of a suprofen (2-[4-2(2-thenoyl) phenyl]propionic acid) (SPF) buffered solution (pH 7.4) in the presence of supercoiled pBR322 DNA leads to single strand breaks with the formation of an open circular form and subsequent linearization of the plasmid. On the basis of agarose gel electrophoresis...

journal_title：Photochemistry and photobiology

authors： Condorelli G,Constanzo LL,De Guidi G,Giuffrida S,Sortino S

更新日期：1995-07-01 00:00:00

abstract：:Photosensitized protein cross-linking has been recently developed to seal wounds and strengthen tissue. Although the photosensitizing dye, Rose Bengal (RB), is phototoxic to cultured cells, cytotoxicity does not accompany RB-photosensitized tissue repair in vivo. We investigated whether the environment surrounding cel...

journal_title：Photochemistry and photobiology

authors： Yao M,Gu C,Doyle FJ Jr,Zhu H,Redmond RW,Kochevar IE

更新日期：2014-03-01 00:00:00