Photosensitization with a chlorin-thiobarbiturate conjugate.

abstract：:Photodynamic therapy (PDT) of solid tumors elicits a strong, acute inflammatory response characterized by a rapid and massive infiltration of activated neutrophils into the tumor. The present study investigated the impact of PDT on the systemic and local (treatment site) kinetics of neutrophil trafficking and activity...

journal_title：Photochemistry and photobiology

authors： Cecic I,Parkins CS,Korbelik M

更新日期：2001-11-01 00:00:00

abstract：:Plastoglobules are lipoprotein particles contained in chloroplasts and other plastids. They have long been regarded as lipid storage droplets. New results now indicate that plastoglobules actively participate in prenylquinone and other metabolic pathways. Structural work shows physical attachment of plastoglobules to ...

journal_title：Photochemistry and photobiology

authors： Bréhélin C,Kessler F

更新日期：2008-11-01 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：:Time-resolved reflectance and transmittance spectroscopy was applied to measure in vivo the absorption and transport scattering spectra of the female breast from 610 to 1010 nm. Three measurement configurations were used to probe different breast regions, and data were collected two or three times in each of the five ...

journal_title：Photochemistry and photobiology

authors： Cubeddu R,D'Andrea C,Pifferi A,Taroni P,Torricelli A,Valentini G

更新日期：2000-09-01 00:00:00

abstract：:The cellular uptake, localization and efflux of meso-tetra-(4-hydroxyphenyl)porphyrin (p-THPP)-loaded nanoparticles have been studied in EMT-6 tumor cells. The effect of blood serum on photocytotoxicity has also been evaluated. Sub-130 nm nanoparticles based on poly(D,L-lactide-co-glycolide) (PLGA) (50:50 PLGA and 75:...

journal_title：Photochemistry and photobiology

authors： Konan YN,Chevallier J,Gurny R,Allémann E

更新日期：2003-06-01 00:00:00

abstract：:Photobiomodulation therapy (PBMT) has anti-inflammatory, analgesic and regenerative properties. This systematic review aimed to critically appraise the published data of in vivo human randomized clinical trials (RCTs), and present a comprehensive overview of the efficacy of PBMT, as an adjunct to the nonsurgical perio...

journal_title：Photochemistry and photobiology

authors： Dalvi S,Benedicenti S,Hanna R

更新日期：2020-10-24 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：:Carp (Cyprinus carpio) were repeatedly exposed to 0, 60, 120 and 240 mJ/cm2 ultraviolet B (UVB) radiation three times in 1 week (short-term exposure) or 12 times in 4 weeks (long-term exposure). The effect of UVB on the functioning of the carp immune system was studied on day 2 after the final irradiation. After short...

journal_title：Photochemistry and photobiology

authors： Markkula SE,Salo HM,Immonen AK,Jokinen EI

更新日期：2005-05-01 00:00:00

abstract：:Analysis of phosphorescence lifetimes using the Stern-Volmer equation is a reliable means of determining quencher concentration for a uniform sample. Methods of analysis for heterogeneous systems are based on the assumption that the excitation is produced by a momentary flash. This condition is an idealization because...

journal_title：Photochemistry and photobiology

authors： Golub AS,Popel AS,Zheng L,Pittman RN

更新日期：1999-06-01 00:00:00

abstract：:Reflectance spectrophotometry from 400 to 800 nm on different cutaneous pigmented lesions, including primary and metastatic malignant melanoma, pigmented nevi, lentigo and seborrhoeic keratosis, has been performed by using an external integrating sphere coupled to a spectrophotometer. Measurements show that reflectanc...

journal_title：Photochemistry and photobiology

authors： Marchesini R,Brambilla M,Clemente C,Maniezzo M,Sichirollo AE,Testori A,Venturoli DR,Cascinelli N

更新日期：1991-01-01 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 proton channels of the bacteriorhodopsin (BR) proton pump contain bound water molecules. The channels connect the purple membrane surfaces with the protonated retinal Schiff base at the membrane center. Films of purple membrane equilibrated at low relative humidity display a shift of the 570 nm retinal absorbance ...

journal_title：Photochemistry and photobiology

authors： Renthal R,Gracia N,Regalado R

更新日期：2000-11-01 00:00:00

abstract：:The intrinsic autofluorescence properties of biological tissues can be affected by the occurrence of histological and biochemical alterations induced by pathological processes. In this study the potential of autofluorescence to distinguish tumor from normal tissues was investigated with the view of a real-time diagnos...

journal_title：Photochemistry and photobiology

authors： Croce AC,Fiorani S,Locatelli D,Nano R,Ceroni M,Tancioni F,Giombelli E,Benericetti E,Bottiroli G

更新日期：2003-03-01 00:00:00

abstract：:We describe here the development of monoclonal antibodies to the hapten tryptophan-riboflavin, generated by irradiation of a solution of bovine serum albumin in the presence of riboflavin. The specificity of the three obtained monoclonal antibodies, named 1E6, 5H5, 5A8 all belonging to the IgG1 isotype, was assessed b...

journal_title：Photochemistry and photobiology

authors： Diaz M,Becker MI,De Ioannes AE,Silva E

更新日期：1996-06-01 00:00:00

abstract：:Adaptability to a broad range of environments together with relatively high resistance to antibiotics and to disinfectants makes Pseudomonas aeruginosa a concern in hospitals and in public health. We investigated whether UVA-mediated photochemical inactivation of P. aeruginosa could be accomplished with high efficienc...

journal_title：Photochemistry and photobiology

authors： Sagripanti JL,Grote G,Niederwöhrmeier B,Hülseweh B,Marschall HJ

更新日期：2012-01-01 00:00:00

abstract：:A novel continuous-flow photocatalytic reactor was designed to decompose toluene by using porous nickel sheets that were coated with a Fe-doped TiO2 catalyst. While locating the UV lamp at the central axis, the catalyst sheets were located along the inner wall and positioned vertically with an equal space of 50 mm alo...

journal_title：Photochemistry and photobiology

authors： Dezhi S,Sheng C,Chung JS,Xiaodong D,Zhibin Z

更新日期：2005-03-01 00:00:00

abstract：:The contribution of DNA strand breaks accumulating in the course of nucleotide excision repair to upregulation of the p53 tumor suppressor protein was investigated in human dermal fibroblast strains after treatment with 254 nm ultraviolet (UV) light. For this purpose, fibroblast cultures were exposed to UV and incubat...

journal_title：Photochemistry and photobiology

authors： Enns L,Murray D,Mirzayans R

更新日期：2000-10-01 00:00:00

abstract：:Endogenous cellular chromophores absorb ultraviolet A radiation (UVA, 290-320 nm), the major UV component of terrestrial solar radiation, leading to the formation of reactive oxidizing species that initiate apoptosis, gene expression and mutagenesis. UVA-induced apoptosis of T helper cells is believed to underlie the ...

journal_title：Photochemistry and photobiology

authors： Zhuang S,Kochevar IE

更新日期：2003-07-01 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：:Previous studies have shown that natural killer (NK) cell activity was suppressed in volunteer subjects exposed to ultraviolet radiation (UVR) from solarium lamps. The present studies were carried out to determine the spectrum of UVR responsible for suppression of NK activity and to develop in vitro methods to analyze...

journal_title：Photochemistry and photobiology

authors： Hersey P,Magrath H,Wilkinson F

更新日期：1993-02-01 00:00:00

abstract：:When Escherichia coli cells were irradiated by UVA in the presence of 6-mercaptopurine (6-MP) or 2-thiouracil (S2Ura), two kinds of repair-deficient strains of recA- and uvrA- were killed more efficiently than the parental wild-type strain having normal repair capacities. In addition, these agents with UVA exposure gr...

journal_title：Photochemistry and photobiology

authors： Komeda K,Iwamoto S,Kominami S,Ohnishi T

更新日期：1997-01-01 00:00:00

abstract：:This paper reviews briefly the evidence for an association between various measures of UV radiation (UVR) exposure and the development of cancer. Issues such as data quality, study design, measurement variation, comparability of studies, and quantification of UV exposure in relation to skin cancer are discussed. A ran...

journal_title：Photochemistry and photobiology

authors： Berwick M,Kesler D

更新日期：2005-11-01 00:00:00

abstract：:Photolysis of 6-chloro-1,3-dimethyluracil and mesitylene in the presence of trifluoroacetic acid (TFA) at low temperature gave 1,3,5,7,9- and 1,3,6,8,10-pentamethylcyclooctapyrimidine-2,4-diones (1b, 1c). Sequential photoreaction of the former (1b) resulted in the formation of 9,11-diazapentacyclo[6.4.0.0(1,3).0(2,5)....

journal_title：Photochemistry and photobiology

authors： Ohkura K,Nishijima K,Seki K

更新日期：2001-09-01 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：:Excessive exposure of solar ultraviolet (UV) radiation, particularly its UV-B component, to humans causes many adverse effects that include erythema, hyperplasia, hyperpigmentation, immunosuppression, photoaging and skin cancer. In recent years, there is increasing use of botanical agents in skin care products. Pomegr...

journal_title：Photochemistry and photobiology

authors： Afaq F,Malik A,Syed D,Maes D,Matsui MS,Mukhtar H

更新日期：2005-01-01 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：:We have compared the cytotoxicity of daunomycin in vitro to highly differentiated normal epithelial cells (Fisher rat thyroid cells, FRTL-5) and to two neoplastic cell lines, a thyroid carcinoma (TK-6) and its lung metastasis (MPTK-6). Whereas the cell lines are equally sensitive to the drug in the dark, if irradiated...

journal_title：Photochemistry and photobiology

authors： Andreoni A,Colasanti A,Kisslinger A,Mastrocinque M,Portella G,Riccio P,Roberti G

更新日期：1993-05-01 00:00:00

abstract：:We investigated the effect of the cation-π interaction on the susceptibility of a tryptophan model system toward interaction with singlet oxygen, that is, type II photooxidation. The model system consists of two indole units linked to a lariat crown ether to measure the total rate of removal of singlet oxygen by the i...

journal_title：Photochemistry and photobiology

authors： Arevalo GE,Cagan DA,Monsour CG,Garcia AC,McCurdy A,Selke M

更新日期：2020-11-01 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：:The photocycle in photoactive yellow protein (PYP) crystals was studied by single-crystal absorption spectroscopy with experimental setups for low-temperature and time-resolved measurements. Thin and flat PYP crystals, suitable for light absorption studies, were obtained using special crystallization conditions. Illum...

journal_title：Photochemistry and photobiology

authors： Kort R,Ravelli RB,Schotte F,Bourgeois D,Crielaard W,Hellingwerf KJ,Wulff M

更新日期：2003-08-01 00:00:00