Development of an in vitro system for the analysis of ultraviolet radiation-induced suppression of natural killer cell activity.

abstract：:Urinary cytology is a noninvasive and unconstraining technique for urothelial cancer diagnosis but lacks sensitivity for detecting low-grade lesions. In this study, the fluorescence properties of classical Papanicolaou-stained urothelial cytological slides from patients or from cell lines were monitored to investigate...

journal_title：Photochemistry and photobiology

authors： Steenkeste K,Lécart S,Deniset A,Pernot P,Eschwège P,Ferlicot S,Lévêque-Fort S,Briandet R,Fontaine-Aupart MP

更新日期：2007-09-01 00:00:00

abstract：:Alignment of the primary structures of the hydrozoan photoproteins, aequorin, mitrocomin, clytin and obelin showed very strong amino acid sequence identities. The Ca(2+)-binding sites of the proteins were found to be highly conserved. The Ca(2+)-binding sites were also homologous to the Ca(2+)-binding sites of other C...

journal_title：Photochemistry and photobiology

authors： Tsuji FI,Ohmiya Y,Fagan TF,Toh H,Inouye S

更新日期：1995-10-01 00:00:00

abstract：:Ultraviolet (UV) radiation is among the most prevalent environmental factors that influence human health and disease. Even 1 h of UV irradiation extensively damages the genome. To cope with resulting deleterious DNA lesions, cells activate a multitude of DNA damage response pathways, including DNA repair. Strikingly, ...

journal_title：Photochemistry and photobiology

authors： Lee JW,Ratnakumar K,Hung KF,Rokunohe D,Kawasumi M

更新日期：2020-05-01 00:00:00

abstract：:Well-resolved vibrational spectra of LH2 complex isolated from two photosynthetic bacteria, Rhodobacter sphaeroides and Ectothiorhodospira sp., were obtained using surface-enhanced resonance Raman scattering (SERRS) exciting into the Qx and the Qy transitions of bacteriochlorophyll a. High-quality SERRS spectra in the...

journal_title：Photochemistry and photobiology

authors： Chumanov G,Picorel R,Ortiz de Zarate I,Cotton TM,Seibert M

更新日期：2000-05-01 00:00:00

abstract：:It has previously been demonstrated that chronic low-dose solar-simulated UV radiation could induce both local and systemic immunosuppression as well as tolerance to a topically applied hapten. In this study, we have used a chronic low-dose UV-irradiation protocol to investigate the effects of UVA on the skin immune s...

journal_title：Photochemistry and photobiology

authors： Bestak R,Halliday GM

更新日期：1996-12-01 00:00:00

abstract：:Consecutive spectral analyses of ultraweak photon emission from sweet potato showing a defense response were conducted to observe the process of physiological transition. The spectrum showed a drastic transition from 2 to 10 h after inoculation with Fusarium oxysporum, during which the emission intensity increased slo...

journal_title：Photochemistry and photobiology

authors： Iyozumi H,Kato K,Makino T

更新日期：2002-03-01 00:00:00

abstract：:Fluoresceinyl cypridina luciferin analog (FCLA) is a chemiluminescence (CL) probe for detecting reactive oxygen species (ROS). Its efficiency for detecting singlet oxygen (1O2) can be significantly enhanced in the presence of human serum albumin (HSA). This phenomenon may apply to important applications for both resea...

journal_title：Photochemistry and photobiology

authors： Zhou J,Xing D,Chen Q

更新日期：2006-07-01 00:00:00

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：: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：:High temperature can promote cyanobacterial blooms, whereas ultraviolet radiation (UVR) can potentially depress cyanobacterial growth by damaging their photosynthetic apparatus. Although the damaging effect of UVR has been well documented, reports on the interactive effects of UV radiation exposure and warming on cyan...

journal_title：Photochemistry and photobiology

authors： Noyma NP,Mesquita MCB,Roland F,Marinho MM,Huszar VLM,Lürling M

更新日期：2021-01-04 00:00:00

abstract：:In recent years the class of known fluorescent proteins (FPs) has dramatically expanded as an ever-increasing numbers of variants and homologs of the green fluorescent protein (GFP) from Aequorea jellyfish have been either engineered in the lab or discovered in other marine organisms. The red fluorescent protein (RFP)...

journal_title：Photochemistry and photobiology

authors： Li Y,Sierra AM,Ai HW,Campbell RE

更新日期：2008-01-01 00:00:00

abstract：:Changes in the emission fluorescence intensity of pheophorbide-a (PHEO) in the presence of carboquone (CARBOQ) were used to obtain the association constant, the number of CARBOQ molecules interacting with PHEO, and the fluorescence quantum yield of the complex. Excitation spectra of mixtures of PHEO and CARBOQ in etha...

journal_title：Photochemistry and photobiology

authors： Díaz-Espinosa Y,Crespo-Hernández CE,Alegría AE,García C,Arce R

更新日期：2011-03-01 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：:The blue light photoreceptor phototropin mediates crucial processes in plants leading to optimization of photosynthesis. Phototropin comprises two flavin mononucleotide-binding LOV (light-, oxygen-, or voltage-sensitive) domains. The LOV domains undergo a photocycle upon illumination, in which two intermediates have b...

journal_title：Photochemistry and photobiology

authors： Bauer C,Rabl CR,Heberle J,Kottke T

更新日期：2011-05-01 00:00:00

abstract：:Confocal laser microspectrofluorometric measurements on human T47D mammary tumor cells have been performed to assess the intracellular distribution of hypericin within the various cell compartments: cytoplasmic membrane, cytoplasm and nucleus. Confocal fluorescence measurements obtained from microvolumes (approximatel...

journal_title：Photochemistry and photobiology

authors： Miskovsky P,Sureau F,Chinsky L,Turpin PY

更新日期：1995-09-01 00:00:00

abstract：:N2-hydroxyisocytosine and 1-methyl-N2-hydroxyisocytosine were studied using a matrix isolation technique combined with infrared absorption spectroscopy. For N2-hydroxyisocytosine isolated in an Ar matrix (at 10 K), two imino-oxo isomers, one with the hydroxyimino =N-OH group directed toward the N1-H group (the form ca...

journal_title：Photochemistry and photobiology

authors： Lapinski L,Nowak MJ,Kwiatkowski JS,Leszczynski J

更新日期：2003-03-01 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：:A major difficulty in photodynamic therapy is the poor solubility of the photosensitizer (PS) under physiological conditions which correlates with low bioavailability. PS aggregation leads to a decrease in the photodynamic efficiency and a more limited activity in vitro and in vivo. To improve the aqueous solubility a...

journal_title：Photochemistry and photobiology

authors： García Vior MC,Marino J,Roguin LP,Sosnik A,Awruch J

更新日期：2013-03-01 00:00:00

abstract：:Strawberry (Fragaria ananassa) fruit size and flavor are important to both growers and consumers. Plastic mulches are frequently used in raised-bed culture to conserve water, control weeds with less herbicides, keep fruit clean and produce ripe berries earlier in the season. The most commonly used plastic mulch color ...

journal_title：Photochemistry and photobiology

authors： Kasperbauer MJ,Loughrin JH,Wang SY

更新日期：2001-07-01 00:00:00

abstract：:In antimicrobial photodynamic therapy, the photosensitizer (PS) in its ground singlet state absorbs light to give the excited singlet state that can transition to the long-lived triplet state. This PS triplet may undergo energy transfer (Type 2) or electron transfer (Type 1) to oxygen to form reactive oxygen species (...

journal_title：Photochemistry and photobiology

authors： Hamblin MR

更新日期：2012-05-01 00:00:00

abstract：:G protein-coupled receptors (GPCRs) are involved in the control of virtually all aspects of our behavior and physiology. Activated receptors catalyze nucleotide exchange in heterotrimeric G proteins (composed of alpha.GDP, beta and gamma subunits) on the inner surface of the cell membrane. The GPCR rhodopsin and the G...

journal_title：Photochemistry and photobiology

authors： Chen Y,Herrmann R,Fishkin N,Henklein P,Nakanishi K,Ernst OP

更新日期：2008-07-01 00:00:00

abstract：:A careful study of the linoleic acid hydroperoxide (LOOH) profile obtained upon peroxidation of linoleic acid (LA) photosensitized by tiaprofenic acid (TPA) and analogous ketones has been undertaken to distinguish between type-I and type-II photoperoxidation mechanisms. 1,4-Cyclohexadiene and 1,2-dimethylcyclohexa-2,5...

journal_title：Photochemistry and photobiology

authors： Samadi A,Martínez LA,Miranda MA,Morera IM

更新日期：2001-04-01 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：:The photodegradation of the herbicide clomazone in the presence of S(2)O(8) (2-) or of humic substances of different origin was investigated. A value of (9.4 +/- 0.4) x 10(8) m(-1) s(-1) was measured for the bimolecular rate constant for the reaction of sulfate radicals with clomazone in flash-photolysis experiments. ...

journal_title：Photochemistry and photobiology

authors： David Gara PM,Bosio GN,Arce VB,Poulsen L,Ogilby PR,Giudici R,Gonzalez MC,Mártire DO

更新日期：2009-05-01 00:00:00

abstract：:Chaetopterus variopedatus has been studied for over a century in terms of its physiology, ecology and life history. One focus of research is on its intrinsic bioluminescent emissions, which can be observed as a blue light emitted from the extremities of individual body segments, or as a secreted mucus. Even though res...

journal_title：Photochemistry and photobiology

authors： Mirza JD,Migotto ÁE,Yampolsky IV,de Moraes GV,Tsarkova AS,Oliveira AG

更新日期：2020-07-01 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：:Limited trypsinization of large pea (Pisum sativum cv. Alaska) phytochrome and subsequent size-exclusion chromatography (SEC) in 0.1 M Na phosphate, pH 7.8, yielded a high-molecular-mass aggregate of tryptic fragments of phytochrome. Further SEC in 0.1 M Tris-HCl, pH 7.5, plus various concentrations of NaSCN, indicate...

journal_title：Photochemistry and photobiology

authors： Yamamoto KT,Tokutomi S

更新日期：1989-07-01 00:00:00

abstract：:Muscle injuries represent ca 30% of sports injuries and excessive stretching of muscle causes more than 90% of injuries. Currently the most used treatments are nonsteroidal anti-inflammatory drugs (NSAIDs), however, in last years, low-level laser therapy (LLLT) is becoming an interesting therapeutic modality. The aim ...

journal_title：Photochemistry and photobiology

authors： de Paiva Carvalho RL,Leal-Junior EC,Petrellis MC,Marcos RL,de Carvalho MH,De Nucci G,Lopes-Martins RA

更新日期：2013-03-01 00:00:00

abstract：:2-Aminoacetophenone (AAP) was recognized as the key compound for the so-called untypical aging off-flavor (UTA) in Vitis vinifera wines. In this study, it was shown that AAP can be formed by photooxidation of free and protein-bound tryptophan (TRP) in combination with a subsequent storage in model wine. Solutions of T...

journal_title：Photochemistry and photobiology

authors： Horlacher N,Schwack W

更新日期：2014-11-01 00:00:00

abstract：:A key challenge for microbiology is to understand how evolution has shaped the wiring of regulatory networks. This is amplified by the paucity of information of power-spectra of physicochemical stimuli to which microorganisms are exposed. Future studies of genome evolution, driven by altered stimulus regimes, will the...

journal_title：Photochemistry and photobiology

authors： van der Steen JB,Hellingwerf KJ

更新日期：2015-09-01 00:00:00