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Journal of Photochemistry and Photobiology. B, Biology

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https://www.readbyqxmd.com/read/28633062/blue-light-induced-reactive-oxygen-species-from-flavin-mononucleotide-and-flavin-adenine-dinucleotide-on-lethality-of-hela-cells
#1
Ming-Yeh Yang, Chih-Jui Chang, Liang-Yü Chen
Photodynamic therapy (PDT) is a safe and non-invasive treatment for cancers and microbial infections. Various photosensitizers and light sources have been developed for clinical cancer therapies. Flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD) are the cofactor of enzymes and are used as photosensitizers in this study. Targeting hypoxia and light-triggering reactive oxygen species (ROS) are experimental strategies for poisoning tumor cells in vitro. HeLa cells are committed to apoptosis when treated with FMN or FAD and exposed to visible blue light (the maximum emitted wavelength of blue light is 462nm)...
June 13, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28624736/fluorescence-of-tautomeric-forms-of-curcumin-in-different-ph-and-biosurfactant-rhamnolipids-systems-application-towards-on-off-ratiometric-fluorescence-temperature-sensing
#2
Zeinab Moussa, Mazhar Chebl, Digambara Patra
Medicinal properties of curcumin are widely getting realized. For its applicability as a hydrophobic drug molecule and food spice interaction of curcumin with rhamnolipids, a biosurfactant, bears importance. Here we have explored interaction of curcumin with rhamnolipids biosurfactant and its aggregation behavior. The impact of pH on critical micelle concentration (cmc) of rhamnolipids has been studied using fluorescence of curcumin and found that cmc of rhamnolipids increases with increase in pH of the medium...
June 11, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28623822/a-novel-photosensitization-treatment-for-the-inactivation-of-fungal-spores-and-cells-mediated-by-curcumin
#3
Fahad Al-Asmari, Ram Mereddy, Yasmina Sultanbawa
The global concerns regarding the emergence of fungicide-resistant strains and the impact of the excessive use of fungicidal practises on our health, food, and environment have increased, leading to a demand for alternative clean green technologies as treatments. Photosensitization is a treatment that utilises a photosensitiser, light and oxygen to cause cell damage to microorganisms. The effect of photosensitization mediated by curcumin on Aspergillus niger, Aspergillus flavus, Penicillium griseofulvum, Penicillium chrysogenum, Fusarium oxysporum, Candida albicans and Zygosaccharomyces bailii was investigated using three methods...
June 8, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28623821/green-biosynthesis-of-magnetic-iron-oxide-fe3o4-nanoparticles-using-the-aqueous-extracts-of-food-processing-wastes-under-photo-catalyzed-condition-and-investigation-of-their-antimicrobial-and-antioxidant-activity
#4
Jayanta Kumar Patra, Kwang-Hyun Baek
In this study, a simple, rapid, and eco-friendly green method was introduced to synthesize magnetite iron oxide nanoparticles (Fe3O4 NPs) using the aqueous extracts of two food processing wastes, namely silky hairs of corn (Zea mays L.) and outer leaves of Chinese cabbage (Brassica rapa L. subsp. pekinensis). The boiled solutions of silky hairs (MH) and outer leaves of Chinese cabbage (CCP) were used to synthesize Fe3O4 NPs under photo exposed condition. The MH-FeNPs and CCP-FeNPs synthesized via green route were characterized by UV-Vis spectroscopy, field emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDX), Fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), differential thermogravimetric (TG/DTG) analysis, and vibrating sample magnetometer (VSM) analysis...
June 8, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28622558/photodynamic-therapy-treatment-of-onychomycosis-with-aluminium-phthalocyanine-chloride-nanoemulsions-a-proof-of-concept-clinical-trial
#5
Luciano Ferreira Morgado, Ana Regina Franchi Trávolo, Luís Alexandre Muehlmann, Paulo Souza Narcizo, Rodrigo Barbosa Nunes, Pedro Alencar Gomes Pereira, Karen Rapp Py-Daniel, Cheng-Shi Jiang, Jinsong Gu, Ricardo Bentes Azevedo, João Paulo Figueiró Longo
The conventional treatment of onychomycosis, a common fungal infection, consists in the use of local and systemic drugs for 4-6 months. This long protocol is often ineffective due to patient compliance, and usually promotes important collateral effects such as liver and kidney failure. As the alternative, Photodynamic Therapy (PDT) has been used as a noninvasive alternative local treatment for onychomycosis due to the reduction of systemic side effects, fact indicates their use for patients undergoing other systemic treatments...
June 8, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28624737/optical-properties-of-the-human-lens-constituents
#6
Ekaterina A Zelentsova, Lyudmila V Yanshole, Anjella Zh Fursova, Yuri P Tsentalovich
The absorption and fluorescence properties of the metabolomic (MET), water-soluble and urea-soluble protein fractions from the middle-age, aged, and cataractous human lenses have been measured. At 280nm and 300nm the major lens absorbers are crystallins, which absorb more than 90% of light in the UV-B region (280-315nm). In middle-aged lenses, the absorption at 360nm is mostly provided by UV filters contained in the MET fraction. With aging, and especially with the cataract development, the absorption of MET fraction in UV-A region (315-400nm) decreases due to the drop of the UV filter concentration, while the absorption of protein fractions increases due to the accumulation of post-translational modifications...
June 3, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28623820/spectral-selectivity-model-for-light-transmission-by-the-intermediate-filaments-in-m%C3%A3-ller-cells
#7
Igor Khmelinskii, Tatiana Golubeva, Elena Korneeva, Mikhail Inyushin, Lidia Zueva, Vladimir Makarov
Presently we continue our studies of the quantum mechanism of light energy transmission in the form of excitons by axisymmetric nanostructures with electrically conductive walls. Using our theoretical model, we analyzed the light energy transmission by biopolymers forming optical channels within retinal Müller cells. There are specialized intermediate filaments (IF) 10-18nm in diameter, built of electrically conductive polypeptides. Presently, we analyzed the spectral selectivity of these nanostructures. We found that their transmission spectrum depends on their diameter and wall thickness...
June 3, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28603084/biosilicate-plga-osteogenic-effects-modulated-by-laser-therapy-in-vitro-and-in-vivo-studies
#8
K R Fernandes, A M P Magri, H W Kido, J R Parisi, L Assis, K P S Fernandes, R A Mesquita-Ferrari, V C Martins, A M Plepis, E D Zanotto, O Peitl, A C M Renno
The main purpose of the present work was to evaluate if low laser level therapy (LLLT) can improve the effects of Biosilicate®/PLGA (BS/PLGA) composites on cell viability and bone consolidation using a tibial defects of rats. The composites were characterized by scanning electron microscope (SEM) and reflection Fourier transform infrared spectrometer (FTIR). For the in vitro study, fibroblast and osteoblast cells were seeded in the extract of the composites irradiated or not with LLLT (Ga-Al-As, 808nm, 10J/cm(2)) to assess cell viability after 24, 48 and 72h...
June 3, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28601037/enterococcus-species-for-the-one-pot-biofabrication-of-gold-nanoparticles-characterization-and-nanobiotechnological-applications
#9
Iyabo Christianah Oladipo, Agbaje Lateef, Joseph Adetunji Elegbede, Musibau Adewuyi Azeez, Tesleem Babatunde Asafa, Taofeek Akangbe Yekeen, Akeem Akinboro, Evariste Bosco Gueguim-Kana, Lorika Selomi Beukes, Tolulope Oluyomi Oluyide, Oluwatoyin Rebecca Atanda
In the current work, cell-free extracts of four strains of non-pathogenic Enterococcus species of food origin, were studied for the green synthesis of gold nanoparticles (AuNPs), and characterized by UV-Vis absorption spectroscopy, Fourier transform infrared spectroscopy (FTIR), and transmission electron microscopy (TEM). The AuNPs were evaluated for their Anopheles gambiae larvicidal, dye degradation, antioxidant and thrombolytic activities. The blue-black colloidal AuNPs which absorbed maximally at 549-552nm were nearly spherical in shape, and crystalline in nature with size of 8-50nm...
June 3, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28601036/light-pollution-affects-nesting-behavior-of-loggerhead-turtles-and-predation-risk-of-nests-and-hatchlings
#10
Elton Silva, Adolfo Marco, Jesemine da Graça, Héctor Pérez, Elena Abella, Juan Patino-Martinez, Samir Martins, Corrine Almeida
The introduction of artificial light into wildlife habitats is a rapidly expanding aspect of global change, which has many negative impacts on a wide range of taxa. In this experimental study, which took place on a beach located on the island of Boa Vista (Cabo Verde), three types of artificial light were tested on nesting loggerhead sea turtles as well as on ghost crabs, which intensively predate on nests and hatchlings, to determine the effects they would produce on the behavior of both species. Over the course of 36days, female loggerheads and ghost crabs were studied under yellow, orange and red lights, with observations also being made on dark nights that served as a control treatment...
June 3, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28599239/synthesis-structural-elucidation-antioxidant-ct-dna-binding-and-molecular-docking-studies-of-novel-chloroquinoline-derivatives-promising-antioxidant-and-anti-diabetic-agents
#11
S Murugavel, C S Jacob Prasanna Stephen, R Subashini, Dhanabalan AnanthaKrishnan
The synthesized novel chloroquinoline derivatives 1-(2-chloro-4-phenylquinolin-3-yl)ethanone (CPQE), 1-(2,6-dichloro-4-phenylquinolin-3-yl)ethanone (DCPQE), methyl 2,6-dichloro-4-phenylquinoline-3-carboxylate (MDCPQC),methyl 2-chloro-4-methylquinoline-3-carboxylate (MCMQC) were subjected to the elementary analysis like FT-IR, NMR and Mass spectra using GCMS. Also, single crystal X-ray diffraction study was executed for the compound MDCPQC. The crystal packing is stabilized by C-H…π and π-π interactions and also Chlorine-Chlorine short intermolecular contacts generating a three-dimensional supramolecular network...
June 1, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28595071/wastewater-remediation-by-tio2-impregnated-chitosan-nano-grafts-exhibited-dual-functionality-high-adsorptivity-and-solar-assisted-self-cleaning
#12
Amr A Essawy, S M Sayyah, A M El-Nggar
This work provides a very infrequent and unique avenue of a novel bio-based nanografted polymeric composites achieving encouraging results in green management of dye contaminants in wastewater. A chitosan-grafted-polyN-Methylaniline (Ch-g-PNMANI) and chitosan-grafted-polyN-Methylaniline imprinted TiO2 nanocomposites (Ch-g-PNMANI/TiO2) were prepared and efficiently applied in wastewater remediation. The nanocomposites were characterized by FT-IR spectroscopy, X-ray diffraction, transmission electron microscopy, UV-Vis diffuse reflectance spectroscopy and Brunauer-Emmett-Teller surface area (BET) measurements...
June 1, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28599238/paederia-foetida-linn-promoted-biogenic-gold-and-silver-nanoparticles-synthesis-characterization-photocatalytic-and-in-vitro-efficacy-against-clinically-isolated-pathogens
#13
Bishal Bhuyan, Arijita Paul, Bappi Paul, Siddhartha Sankar Dhar, Pranab Dutta
Development of newer improved therapeutic agents with efficient antimicrobial activities continues to draw attention of researchers till date. Moreover, abatement of polluting dyes released from industry with enhanced efficiency is currently being considered as challenging task for people working on material sciences. In the present study, we report a facile biogenic synthesis of gold and silver nanoparticles (NPs) in which aqueous extracts of Paederia foetida Linn. was used as reducing as well as stabilizing agent...
May 31, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28595075/adsorption-and-photocatalysis-efficiency-of-magnetite-quantum-dots-anchored-tin-dioxide-nanofibers-for-removal-of-mutagenic-compound-toxicity-evaluation-and-antibacterial-activity
#14
Ali Fakhri, Mahsa Naji, Pedram Afshar Nejad
The Magnetite Fe3O4 quantum dots anchored SnO2 nanofibers (Fe3O4 QDs/SnO2 NFs) have been synthesized using the facile one step hydrothermal method. The characteristic structure of synthesized Fe3O4 QDs/SnO2 NFs was analyzed using X-ray diffraction, Transmission electron Microscopy, Scanning electron microscopy, UV-vis diffuse reflectance, photoluminescence spectroscopy, and N2 adsorption-desorption instrumental techniques. The crystallites size of Fe3O4QDs/SnO2 NFs was 7.0nm. The average diameters of Fe3O4QDs/SnO2 NFs were 7...
May 31, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28595074/protective-effect-of-arthrospira-platensis-extracts-against-ultraviolet-b-induced-cellular-senescence-through-inhibition-of-dna-damage-and-matrix-metalloproteinase-1-expression-in-human-dermal-fibroblasts
#15
Jeong-Ju Lee, Ki Bbeum Kim, Jina Heo, Dae-Hyun Cho, Hee-Sik Kim, Song Hee Han, Kyu Joong Ahn, In-Sook An, Sungkwan An, Seunghee Bae
Ultraviolet (UV) light exposure causes skin photoaging, which is known to be preventable and controllable by application of UV-protective agents. In this study, we demonstrated, for the first time, that the extract of microalgae Arthrospira platensis has a reverse effect on UV-induced photodamage such as loss of cell viability, cellular senescence, DNA damage, and collagen destruction in dermal fibroblasts. Forty-eight extracts were prepared from the cell biomass by controlling culture light conditions, extract solvents, and disruption methods...
May 31, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28595072/zinc-phthalocyanines-attached-to-gold-nanorods-for-simultaneous-hyperthermic-and-photodynamic-therapies-against-melanoma-in-vitro
#16
L F Freitas, M R Hamblin, F Anzengruber, J R Perussi, A O Ribeiro, V C A Martins, A M G Plepis
Studies indicate that hyperthermic therapy using gold nanorods and photodynamic activity with many photosensitizers can present a synergistic effect, and offer a great therapeutic potential, although more investigation needs to be performed before such approach could be implemented. We proposed to investigate the effect of the attachment of phthalocyanines on the surface of gold nanorods (well-characterized devices for hyperthermia generation) for the elimination of melanoma, one of the most important skin cancers due to its high lethality...
May 30, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28599240/metal-ion-mediated-photolysis-reactions-of-riboflavin-a-kinetic-study
#17
Iqbal Ahmad, Zubair Anwar, Sofia Ahmed, Muhammad Ali Sheraz, Saif-Ur-Rehman Khattak
The effect of metal ion complexation on the photolysis of riboflavin (RF) using various metal ions (Ag(+), Ni(2+), Co(2+), Fe(2+), Ca(2+), Cd(2+), Cu(2+), Mn(2+), Pb(2+), Mg(2+), Zn(2+), Fe(3+)) has been studied. Ultraviolet and visible spectral and fluorimetric evidence has been obtained to confirm the formation of metal-RF complexes. The kinetics of photolysis of RF in metal-RF complexes at pH7.0 has been evaluated. The apparent first-order rate constant (kobs) for the photolysis of RF and the formation of lumichrome (LC) and lumiflavin (LF) (0...
May 29, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28595073/probing-the-binding-reaction-of-cytarabine-to-human-serum-albumin-using-multispectroscopic-techniques-with-the-aid-of-molecular-docking
#18
Liang Xu, Yan-Xi Hu, Jin Li, Yu-Feng Liu, Li Zhang, Hai-Xin Ai, Hong-Sheng Liu
Cytarabine is a kind of chemotherapy medication. In the present study, the molecular interaction between cytarabine and human serum albumin (HSA) was investigated via fluorescence, UV-vis absorption, circular dichroism (CD) spectroscopy and molecular docking method under simulative physiological conditions. It was found that cytarabine could effectively quench the intrinsic fluorescence of HSA through a static quenching process. The apparent binding constants between drug and HSA at 288, 293 and 298K were estimated to be in the order of 10(3)L·mol(-1)...
May 29, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28582711/biomedical-applications-of-green-synthesized-nobel-metal-nanoparticles
#19
Zia Ul Haq Khan, Amjad Khan, Yongmei Chen, Noor S Shah, Nawshad Muhammad, Arif Ullah Khan, Kamran Tahir, Faheem Ullah Khan, Behzad Murtaza, Sadaf Ul Hassan, Saeed Ahmad Qaisrani, Pingyu Wan
Synthesis of Nobel metal nanoparticles, play a key role in the field of medicine. Plants contain a substantial number of organic constituents, like phenolic compounds and various types of glycosides that help in synthesis of metal nanoparticles. Synthesis of metal nanoparticles by green method is one of the best and environment friendly methods. The major significance of the green synthesis is lack of toxic by-products produced during metal nanoparticle synthesis. The nanoparticles, synthesized by green method show various significant biological activities...
May 27, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28577421/season-dependent-effects-of-photoperiod-and-temperature-on-circadian-rhythm-of-arylalkylamine-n-acetyltransferase2-gene-expression-in-pineal-organ-of-an-air-breathing-catfish-clarias-gariepinus
#20
Kshetrimayum Manisana Singh, Saurav Saha, Braj Bansh Prasad Gupta
Arylalkylamine N-acetyltransferase (AANAT) activity, aanat gene expression and melatonin production have been reported to exhibit prominent circadian rhythm in the pineal organ of most species of fish. Three types of aanat genes are expressed in fish, but the fish pineal organ predominantly expresses aanat2 gene. Increase and decrease in daylength is invariably associated with increase and decrease in temperature, respectively. But so far no attempt has been made to delineate the role of photoperiod and temperature in regulation of the circadian rhythm of aanat2 gene expression in the pineal organ of any fish with special reference to seasons...
May 27, 2017: Journal of Photochemistry and Photobiology. B, Biology
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