Spectroscopic study of the light-harvesting protein C-phycocyanin associated with colorless linker peptides.

abstract：:The capacity of some linear and angular furocoumarins to induce DNA-protein cross-links by UVA (320-400 nm) irradiation has been evaluated in Chinese hamster ovary cells. Two linear furocoumarins, psoralen and 8-methoxypsoralen appeared to be capable of inducing DNA-protein cross-links to a noticeable extent. 4'-Methy...

journal_title：Photochemistry and photobiology

authors： Bordin F,Carlassare F,Busulini L,Baccichetti F

更新日期：1993-07-01 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：:We have used the complex of antigen with class II major histocompatibility proteins (Ia) in membrane-bound form to target a phototoxic compound to antigen-specific T cell hybridomas in vitro. The iodoacetamidyl ester of phototoxic pyrene was bound covalently to antigen-presenting cells (APC), and protein antigens were...

journal_title：Photochemistry and photobiology

authors： Chang NH,Rayner DC,Boggs JM

更新日期：1995-05-01 00:00:00

abstract：:The objective of this study was to assess the diagnostic potential of synchronous fluorescence (SF) spectroscopy (SFS) technique for the detection and characterization of normal and different malignancy stages of moderately differentiated squamous cell carcinoma (MDSCC), poorly differentiated squamous cell carcinoma (...

journal_title：Photochemistry and photobiology

authors： Ebenezar J,Aruna P,Ganesan S

更新日期：2010-01-01 00:00:00

abstract：:Several studies in the literature indicate that histones (lysine rich proteins found associated with DNA in eukaryotic chromatin), as well as poly-L-lysine, can be photocross-linked by ultraviolet (UV) light to DNA in which 5-bromo-2'-deoxyuridine has been substituted for thymidine. To gain some insight into the possi...

journal_title：Photochemistry and photobiology

authors： Shetlar MD,Rose RB,Hom K,Shaw AA

更新日期：1991-05-01 00:00:00

abstract：:Phototherapy with broadband UVB is an effective treatment for inflammatory dermatoses. A newly developed fluorescent UVB lamp (Philips TL01) that emits a narrowband UVB around 311 nm was shown to be superior for the phototherapy of psoriasis. In order to contribute to the knowledge about the carcinogenic potential of ...

journal_title：Photochemistry and photobiology

authors： Tzung TY,Rünger TM

更新日期：1998-06-01 00:00:00

abstract：:This paper analyzes the influence of infrared radiation (IR) on regeneration, after autotomy of limb buds of Neohelice granulata and consequently the time molt. Eyestalks were ablated to synchronize the start of molt. Afterward, animals were autotomized of five pereopods and divided into control and irradiated groups....

journal_title：Photochemistry and photobiology

authors： Gonzalez VC,Lena AB,Espindola WA,de Souza Votto AP,Jorge MB,de Moraes Vaz Batista Filgueira D,Bianchini A,Sérgio Varela Júnior A,Nery LE,Trindade GS

更新日期：2009-09-01 00:00:00

abstract：:We report the synthesis of twelve indole derivatives bearing nitro or amide groups via Fischer indole methodology followed by reduction/acetylation and amidation reactions. After thorough characterization, these indoles were subjected to a number of studies in order to evaluate their bioactive potential as photosynthe...

journal_title：Photochemistry and photobiology

authors： de Souza JM,Fazolo BR,Lacerda JWF,Moura MS,Dos Santos ACR,de Vasconcelos LG,de Sousa Junior PT,Dall'Oglio EL,Ali A,Sampaio OM,Vieira LCC

更新日期：2020-11-01 00:00:00

abstract：:Unidirectional blue light directs the rhizoid-thallus axis in the apolar zygote of the brown alga, Silvetia compressa. This effect is mediated by an increase in the intracellular concentration of guanosine 3', 5'-cyclic monophosphate. In this study we show the identification of a rhodopsin-like protein, by means of an...

journal_title：Photochemistry and photobiology

authors： Gualtieri P,Robinson KR

更新日期：2002-01-01 00:00:00

abstract：:This study outlines the potential for Computational Fluid Dynamics (CFD) simulation to be used to predict upper-room ultraviolet germicidal irradiation (UVGI) effectiveness to aid system design and the development of future guidance. A numerical study of two wall-mounted UVGI lamps in a mechanically ventilated test ch...

journal_title：Photochemistry and photobiology

authors： Gilkeson CA,Noakes C

更新日期：2013-07-01 00:00:00

abstract：:Antisense oligodeoxynucleotides directed against a 24-mer RNA derived from the long terminal repeat (LTR) region of HIV were linked to proto- and methylpyrroporphyrin and their zinc derivatives. The oligonucleotide-porphyrin conjugates were tested for their ability to induce photodamage on the target RNA. Upon hybridi...

journal_title：Photochemistry and photobiology

authors： Mastruzzo L,Woisard A,Ma DD,Rizzarelli E,Favre A,Le Doan T

更新日期：1994-10-01 00:00:00

abstract：:The efficiency of ruthenium complexes for photosensitizing DNA damage depends on the oxidizing character of their ligands. Here we report on the difference in behavior of tris(2.2'-bipyrazyl)ruthenium(II) (Ru[bpz]3(2+)), tris(2,2'-bipyridyl)ruthenium(II) (Ru[bipy]3(2+)) and cis-dichlorobis (2,2'-bipyrazyl)ruthenium(II...

journal_title：Photochemistry and photobiology

authors： Vicendo P,Mouysset S,Paillous N

更新日期：1997-04-01 00:00:00

abstract：:Paracoccidioidomycosis is the most prevalent human mycosis in Latin America. Cutaneous lesions are extremely painful and sensitive, and current treatment with antifungal drugs is lengthy and may cause side effects to patients. In this perspective, the helium-neon (HeNe) laser emerges as a novel therapy form due to its...

journal_title：Photochemistry and photobiology

authors： Nagib PR,Gameiro J,da Costa TA,Di Gangi R,Ribeiro Jda S,Paulino LC,Verinaud L

更新日期：2010-07-01 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：:Although the first reactive oxygen species (ROS) formed during irradiation of photosensitized cells is almost invariably singlet molecular oxygen (1O2), other ROS have been implicated in the phototoxic effects of photodynamic therapy (PDT). Among these are superoxide anion radical (*O2(-)), hydrogen peroxide (H2O2) an...

journal_title：Photochemistry and photobiology

authors： Price M,Terlecky SR,Kessel D

更新日期：2009-11-01 00:00:00

abstract：:Our recent study follows up an earlier one which demonstrated hypericin-mediated photocytotoxic effects on HT-29 adenocarcinoma cells by light fractionation with a longer dark pause between two unequal light doses (Sackova, A. [2005] Photochem. Photobiol.81, 1411-1416). Here, we present closer study on events invoked ...

journal_title：Photochemistry and photobiology

authors： Kuliková L,Mikeš J,Hýžďalová M,Palumbo G,Fedoročko P

更新日期：2010-11-01 00:00:00

abstract：:Photolysis of ester 1 in argon-saturated methanol and acetonitrile does not produce any product, whereas irradiation of 1 in oxygen-saturated methanol yields peroxide 2. Laser flash photolysis studies demonstrate that 1 undergoes intramolecular H atom abstraction to form biradical 3 (λmax ~340 nm), which intersystem c...

journal_title：Photochemistry and photobiology

authors： Das A,Lao EA,Gudmundsdottir AD

更新日期：2016-05-01 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：:Sulfur-substituted nucleobases (a.k.a., thiobases) are among the world's leading prescriptions for chemotherapy and immunosuppression. Long-term treatment with azathioprine, 6-mercaptopurine and 6-thioguanine has been correlated with the photoinduced formation of carcinomas. Establishing an in-depth understanding of t...

journal_title：Photochemistry and photobiology

authors： Ashwood B,Pollum M,Crespo-Hernández CE

更新日期：2019-01-01 00:00:00

abstract：:Solid-state NMR spectroscopy gives a powerful avenue for investigating G protein-coupled receptors and other integral membrane proteins in a native-like environment. This article reviews the use of solid-state (2)H NMR to study the retinal cofactor of rhodopsin in the dark state as well as the meta I and meta II photo...

journal_title：Photochemistry and photobiology

authors： Brown MF,Martínez-Mayorga K,Nakanishi K,Salgado GF,Struts AV

更新日期：2009-03-01 00:00:00

abstract：:Dermatophytes are fungi that can cause infections (known as tinea) of the skin, hair and nails because of their ability to use keratin. Superficial mycoses are probably the most prevalent of infectious diseases worldwide. One of the most distinct limitations of the current therapeutic options is the recurrence of the ...

journal_title：Photochemistry and photobiology

authors： Smijs TG,Schuitmaker HJ

更新日期：2003-05-01 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：:Efficacy of ionizing radiation (I/R) was compared with phototoxic effects of photodynamic therapy (PDT) in vitro using two cell lines derived from patients with head and neck squamous cell carcinoma (HNSCC). A cell line derived from a donor with a human papilloma virus (HPV) infection was more responsive to I/R but si...

journal_title：Photochemistry and photobiology

authors： Kessel D,Cho WJ,Rakowski J,Kim HE,Kim HC

更新日期：2020-05-01 00:00:00

abstract：:In current clinical practice, photodynamic therapy (PDT) is carried out with prescribed drug doses and light doses as well as fixed drug-light intervals and illumination fluence rates. This approach can result in undesirable treatment outcomes of either overtreatment or undertreatment because of biological variations ...

journal_title：Photochemistry and photobiology

authors： Zeng H,Korbelik M,McLean DI,MacAulay C,Lui H

更新日期：2002-04-01 00:00:00

abstract：:Photodynamic therapy (PDT) with photosensitizer verteporfin is a clinically approved vascular disrupting modality that is currently in clinical trial for cancer treatment. In this study, we evaluated PDT in combination with either mTORC1 inhibitor rapamycin or mTORC1/C2 dual inhibitor AZD2014 for therapeutic enhanceme...

journal_title：Photochemistry and photobiology

authors： Kraus D,Palasuberniam P,Chen B

更新日期：2020-03-01 00:00:00

abstract：:In this issue, we offer a symposium-in-print that is focused on several new advancements in fundamental research related to the family of GFP (green fluorescent protein)-like proteins. A few applied aspects are also included to illustrate the impact this amazing set of colored proteins has made on our understanding of...

journal_title：Photochemistry and photobiology

authors： Wachter RM

更新日期：2006-03-01 00:00:00

abstract：:We recently reported that variations in cellular phototoxicity among a series of alkynyl-substituted zinc trisulfophthalocyanines (ZnPcS3Cn) correlates with their hydrophobicity, with the most amphiphilic derivatives showing the highest cell uptake and phototoxicity. In this study we address the role of the plasma mem...

journal_title：Photochemistry and photobiology

authors： Cauchon N,Nader M,Bkaily G,van Lier JE,Hunting D

更新日期：2006-11-01 00:00:00

abstract：:We compared mutagenesis and sister chromatid exchange (SCE) induction by 193 nm and 308 nm pulsed excimer laser radiation with 254 nm low intensity continuous wave UV light in Chinese hamster ovary (CHO) cells in culture. The 254 nm radiation was most mutagenic of the radiations, in accordance with expectation, and al...

journal_title：Photochemistry and photobiology

authors： Rasmussen RE,Hammer-Wilson M,Berns MW

更新日期：1989-04-01 00:00:00

abstract：:The ultraviolet (UV) component of solar radiation is the driving force of life on earth, but it can cause photoaging and skin cancer. In this study, we investigated the effects of the glucosamine-derivative 2-(N-Acetyl)-L-phenylalanylamido-2-deoxy-β-D-glucose (NAPA) on human primary fibroblasts (FBs) stimulated in vit...

journal_title：Photochemistry and photobiology

authors： Lopreiato M,Cocchiola R,Falcucci S,Leopizzi M,Cardone M,Di Maio V,Brocco U,D'Orazi V,Calvieri S,Scandurra R,De Marco F,Scotto d'Abusco A

更新日期：2020-01-01 00:00:00

abstract：:Vitamin D production in human skin occurs only when incident UV radiation exceeds a certain threshold. From simulations of UV irradiances worldwide and throughout the year, we have studied the dependency of the extent and duration of cutaneous vitamin D production in terms of latitude, time, total ozone, clouds, aeros...

journal_title：Photochemistry and photobiology

authors： Engelsen O,Brustad M,Aksnes L,Lund E

更新日期：2005-11-01 00:00:00