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Journal of Photochemistry and Photobiology. B, Biology

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https://www.readbyqxmd.com/read/28732334/does-laser-phototherapy-influence-the-proliferation-of-myoepithelial-cells-in-the-salivary-gland-of-hypothyroid-rats
#1
Virgínia Dias Uzêda-E-Silva, Tania Tavares Rodriguez, Luciana Maria Pedreira Ramalho, Flávia Calo Aquino Xavier, Isabele Cardoso Vieira de Castro, Antônio Luiz Barbosa Pinheiro, Jean Nunes Dos Santos
Thyroid hormones influence both development and growth of organs and tissues and guarantee metabolic demands that interfere with the quality of digestive secretions, including those of the salivary glands. Laser phototherapy - LPT can modulate various biological phenomena and its diverse effects permit the action on different cell types. The aim of this study was to evaluate the influence of laser phototherapy on myoepithelial cells of salivary glands of hypothyroid rats. Forty-two albino Wistar rats were divided into two main groups: euthyroid (EU) and hypothyroid (HYPO)...
July 12, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28715781/effects-of-blue-or-violet-light-on-the-inactivation-of-staphylococcus-aureus-by-riboflavin-5-phosphate-photolysis
#2
Tak-Wah Wong, Chien-Wei Cheng, Zong-Jhe Hsieh, Ji-Yuan Liang
The light sensitive compound riboflavin-5'-phosphate (or flavin mononucleotide, FMN) generates reactive oxygen species (ROS) upon photo-irradiation. FMN is required by all flavoproteins because it is a cofactor of biological blue-light receptors. The photochemical effects of FMN after irradiation by blue or violet light on the inactivation of Staphylococcus aureus strains, including a methicillin-resistant strain (MRSA), were investigated in this study. Upon blue- or violet-light photo-treatment, FMN was shown to inactivate S...
July 12, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28711840/a-promising-protected-ascorbic-acid-hydroxyapatite-nanocomposite-as-a-skin-anti-ager-a-detailed-photo-and-thermal-stability-study
#3
Mahmoud A Sliem, Rania A Karas, M A Harith
A new ascorbic acid (AA) nanocomposite with low toxicity and high photo and thermal stability is constructed for certain dermatological applications in humans. The presented nanocomposite consists of AA, nano-hydroxyapatite (nHAp) and carboxymethyl cellulose (CMC). The physicochemical properties of such CMC-nHAp-AA nanocomposite were characterized using X-Ray diffractometery (XRD), Fourier Transform Infra-Red (FTIR), Energy Dispersive X-ray (EDX) and UV-VIS spectroscopies. The size and morphology of the synthesized nanocomposites were characterized by TEM/SEM techniques...
July 8, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28711020/synthesis-structures-nuclease-activity-cytotoxicity-dft-and-molecular-docking-studies-of-two-nitrato-bridged-homodinuclear-cu-cu-zn-zn-complexes-containing-2-2-bipyridine-and-a-chalcone-derivative
#4
Ruchi Gaur, Diksha Kumari Choubey, Mohammad Usman, Benzamin D Ward, Jagat Kumar Roy, Lallan Mishra
Nitrato briged dinuclear complexes of type [Cu2(L)2(bpy)2(NO3)](NO3)·4H2O, 1 and [Zn2(L)2(bpy)2(NO3)](NO3)·4H2O, 2 (L=deprotonated form of free ligand LH, [1-(2-hydroxyphenyl)-3-(9-anthracenyl) propenone; bpy=2,2'bipyridine] are synthesized and characterized using a battery of physicochemical techniques and X-ray crystallography. A distorted square pyramidal geometry is assigned to them with N2O3 coordination core around the metal ion. The co-ligand L binds the metal ions through its O,O' atoms in anti-syn mode...
July 8, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28711019/photo-catalytic-anti-bacterial-and-anti-cancer-properties-of-phyto-mediated-synthesis-of-silver-nanoparticles-from-artemisia-tournefortiana-rchb-extract
#5
Fahimeh Baghbani-Arani, Rabee Movagharnia, Alireza Sharifian, Soheil Salehi, Seyed Ataollah Sadat Shandiz
Metal nanoparticles have largely been investigated due to their potential medicinal activities. This study demonstrates the biological properties of green-synthesized silver nanoparticles (AgNPs) by using Artemisia tournefortiana Rchb ethanol extract. Instrumentations such as ultraviolet-visible spectra analysis, high-resolution transmission electron microscopy, scanning electron microscopy, energy-dispersive X-ray analysis, X-ray diffraction, and Fourier transform infrared spectroscopy were used to reveal the synthesized AgNPs...
July 6, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28697478/shedding-lights-on-the-flexible-armed-porphyrins-human-telomeric-g4-dna-interaction-and-cell-photocytotoxicity-research
#6
Xiang-Yu Sun, Ping Zhao, Shu-Fang Jin, Min-Chao Liu, Xia-Hong Wang, Yu-Min Huang, Zhen-Feng Cheng, Si-Qi Yan, Yan-Yu Li, Ya-Qing Chen, Yan-Mei Zhong
DNA polymorphism exerts a fascination on a large scientific community. Without crystallographic structural data, clarification of the binding modes between G-quadruplex (G4) and ligand (complex) is a challenging job. In the present work, three porphyrin compounds with different flexible carbon chains (arms) were designed, synthesized and characterized. Their binding, folding and stabilizing abilities to human telomeric G4 DNA structures were comparatively researched. Positive charges at the end of the flexible carbon chains seem to be favorable for the DNA-porphyrin interactions, which were evidenced by the spectral results and further confirmed by the molecular docking calculations...
July 4, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28697474/extraction-of-natural-colorant-from-purple-sweet-potato-and-dyeing-of-fabrics-with-silver-nanoparticles-for-augmented-antibacterial-activity-against-skin-pathogens
#7
Palanivel Velmurugan, Jae-In Kim, Kangmin Kim, Jung-Hee Park, Kui-Jae Lee, Woo-Suk Chang, Yool-Jin Park, Min Cho, Byung-Taek Oh
The main objective of this study was to extract natural colorant from purple sweet potato powder (PSPP) via a water bath and ultrasound water bath using acidified ethanol (A. EtOH) as the extraction solvent. When optimizing the colorant extraction conditions of the solvents, acidified ethanol with ultrasound yielded a high extraction capacity and color intensity at pH2, temperature of 80°C, 20mL of A. EtOH, 1.5g of PSPP, time of 45min, and ultrasonic output power of 75W. Subsequently, the colorant was extracted using the optimized conditions for dyeing of textiles (leather, silk, and cotton)...
July 4, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28697473/biophysical-studies-on-the-interaction-of-a-novel-oxime-based-palladium-ii-complex-with-dna-and-rna
#8
Nirmalya Bandyopadhyay, Pritha Basu, Gopinatha Suresh Kumar, Bhargab Guhathakurta, Pijush Singh, Jnan Prakash Naskar
A novel oxime based palladium(II) complex (1) has been synthesized out of the reaction of a Schiff base ligand, 1-phenyl-1-(pyridin-2-yl-hydrazono)-propan-2-one oxime (LH2) with Na2[PdCl4] in THF. Red and diamagnetic 1 has thoroughly been characterized by several analytical and spectroscopic means like CHN, ESI-MS, FAB-MS, FT-IR, (1)H NMR, (13)C NMR, UV-Vis and molar electrical conductivity measurements. Geometry optimizations at the level of DFT reveals that the Pd(II) centre in 1 is nested in a square-planar 'N3Cl' coordination environment...
July 1, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28697476/characterizing-the-binding-interaction-of-fungicide-boscalid-with-bovine-serum-albumin-bsa-a-spectroscopic-study-in-combination-with-molecular-docking-approach
#9
Yan-Yue Lou, Kai-Li Zhou, Jie-Hua Shi, Dong-Qi Pan
Boscalid, a carboxamide fungicide, is used in the treatment of grey mould and powdery mildew, widely applied to a variety of crops and fruits such as rice, wheat, grapes and pears. It will become a potential risk for health due to its widely application and residue in crops and fruits. In this study, the binding interaction between boscalid and bovine serum albumin (BSA) was characterized using steady-state fluorescence spectroscopy, ultraviolet spectroscopy (UV), synchronous fluorescence spectroscopy, 3D fluorescence spectroscopy, Fourier transform infrared spectroscopy (FT-IR) and molecular docking to ascertain the store, transport and distribution of boscalid in vivo...
June 30, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28697477/green-synthesis-of-gold-nanoparticles-using-a-cheap-sphaeranthus-indicus-extract-impact-on-plant-cells-and-the-aquatic-crustacean-artemia-nauplii
#10
Chinnasamy Balalakshmi, Kasi Gopinath, Marimuthu Govindarajan, Ravi Lokesh, Ayyakannu Arumugam, Naiyf S Alharbi, Shine Kadaikunnan, Jamal M Khaled, Giovanni Benelli
The impact of green-fabricated gold nanoparticles on plant cells and non-target aquatic species is scarcely studied. In this research, we reported an environment friendly technique for the synthesis of gold nanoparticles (Au NPs) using the Sphaeranthus indicus leaf extract. The formation of the metal NPs was characterized by UV-Visible and FT-IR spectroscopy, XRD, SEM and TEM analyses. The UV-Visible spectra of Au NPs showed a surface plasmon resonance peak at 531nm. FT-IR analysis indicated functional bio-molecules associated with Au NPs formation...
June 29, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28697472/protective-effects-of-grape-stem-extract-against-uvb-induced-damage-in-c57bl-mice-skin
#11
Denis Nchang Che, Guang Hua Xie, Byoung Ok Cho, Jae Young Shin, Hyun Ju Kang, Seon Il Jang
Humans have become exposed to another form of a trait which is ultraviolet B (UVB) radiation reaching the earth's surface. This has become a major source of oxidative stress that ultimately leads to inflammation, DNA damage, photoaging and pigmentation disorders etc. Although several studies have shown the photo-protective role of different grape parts like the fruits and seeds, little or no data demonstrating the in vivo photo-protective role of grape stem, which is the most discarded part of the grape are available...
June 29, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28692926/phototoxic-assessment-of-a-sunscreen-formulation-and-its-excipients-an-in-vivo-and-in-vitro-study
#12
Bryan Hudson Hossy, Alvaro Augusto da Costa Leitão, Elisabete Pereira Dos Santos, Monique Matsuda, Laura Barros Rezende, Janine Simas Cardoso Rurr, Alicia Viviana Pinto, Marcia Ramos-E-Silva, Marcelo de Pádula, Nádia Campos de Oliveira Miguel
BACKGROUND: Cosmetic preservatives are used to protect cosmetic formulations and improve its shelf-life. However, these substances may exert phototoxic effects when used under sunlight. OBJECTIVE: To assess safety, efficacy and putative phototoxic effects of a sunscreen formulation SPF 30 and its excipients. MATERIALS/METHODS: Irradiation was performed with solar simulated light (SSL) and the sunscreen from the School of Pharmacy/UFRJ/Brazil...
June 29, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28683398/polyethyleneimine-protected-silver-nanoclusters-luminescence-probe-for-sensitive-detection-of-cobalt-ii-in-living-cells
#13
Lei Meng, Quan Zhu, Jian-Hang Yin, Na Xu
A simple luminescence sensor, based on polyethyleneimine protected silver nanoclusters (AgNCs@PEI) is successfully fabricated via one-pot reduction method. The obtained AgNCs@PEI are characterized by high-resolution transmission electron microscopy (HR-TEM), Dynamic light scattering (DLS), transient and steady-state fluorescence, and UV-vis spectroscopy. The NCs show large Stocks-shift (∼130nm), high tolerability to extreme pH and high ionic strengths, and excellent photo-stability under UV irradiation, laying the basement for the practical applications...
June 29, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28738309/irradiation-by-blue-light-in-the-presence-of-a-photoacid-confers-changes-to-colony-morphology-of-the-plant-pathogen-colletotrichum-gloeosporioides
#14
Ron Simkovitch, Oren Gajst, Einat Zelinger, Oded Yarden, Dan Huppert
We used the photoacid 8-hydroxy-1,3,6-pyrenetrisulfonate (HPTS) that converts blue photons to acidic protons in water, with an efficiency of close to 100%, and determined that this treatment conferred changes to colony morphology of the plant pathogen Colletotrichum gloeosporioides. The time elapsed until hyphal collapse is noticed depends on both the laser intensity in mW/cm(2), and the concentration of HPTS in the Agar hydrogel. The time elapsed until hyphal collapse is noticed varies by only ±8% at HPTS concentrations of 500μM and at lower concentrations of HPTS the variance increases as the inverse of the concentration...
June 28, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28692925/role-of-the-adjunctive-antimicrobial-photodynamic-therapy-to-periodontal-treatment-at-plasmatic-oxidative-stress-and-vascular-behavior
#15
L M Barin, R C S Barcelos, L T Vey, F M Pillusky, V M Palma, K Z Kantorski, M E Bürger, R M Maciel, C C Danesi
BACKGROUND: To evaluate for the first time in vivo the effects of methylene blue (MB) photosensitizer dissolved in ethanol in antimicrobial photodynamic therapy (aPDT) as adjuvant periodontal treatment, at plasmatic oxidative stress and vascular behavior in rat model. METHODS: Wistar rats were divided into negative control (NC, no periodontitis) and positive control (PC, with periodontitis, without any treatment). The other groups had periodontitis and were treated with scaling and root planing (SRP); SRP+aPDT+MB dissolved in water (aPDT I); SRP+aPDT+MB dissolved in ethanol (aPDT II)...
June 28, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28709077/phytonanotherapy-for-management-of-diabetes-using-green-synthesis-nanoparticles
#16
K Anand, C Tiloke, Pragalathan Naidoo, A A Chuturgoon
The world has a rich diversity of indigenous medicinal plants. The World Health Organization (WHO) gives high priority to eco-friendly, non-hazardous and cost effective healthcare such as the use of medicinal plants to treat various illnesses, including Human immunodeficiency virus (HIV) infection and Acquired immune deficiency syndrome (AIDS), tuberculosis (TB), diabetes mellitus (DM), malaria, and cancer. In developing countries, a high proportion of the population tends to use complementary and alternative medicines (CAM) together with conventional prescription drugs...
June 27, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28697475/light-response-of-sunflower-and-canola-as-affected-by-plant-density-plant-genotype-and-n-fertilization
#17
A Soleymani
Crop response to light is an important parameter determining crop growth. Three field (split plots) experiments were conducted to investigate the effects of plant density, plant genotype and N fertilization on the light absorption and light extinction of sunflower (Helianthus annuus L.) and canola (Brassica napus L.). A detailed set of plant growth, light absorption and crop yield and oil related parameters were determined. Light was measured at noon during the sunny days with clear sky. In experiment I, although the plant density (PD) of 14 resulted in the highest rate of sunflower light absorption (31...
June 27, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28686960/photodynamic-therapy-with-tmpyp-porphyrine-induces-mitotic-catastrophe-and-microtubule-disorganization-in-hela-and-g361-cells-a-comprehensive-view-of-the-action-of-the-photosensitizer
#18
Věra Cenklová
Photodynamic therapy (PDT) is a useful tool against cancer and various other diseases. PDT is capable to induce different cell death mechanisms, due to the PDT evoked reactive oxygen species (ROS) production and is dose dependent. It is known that cytoskeleton is responsible for numerous cell functions, including cell division, maintenance of cell shape, their adhesion ability and movement. PDT initiated redistribution and subsequent disintegration of cytoskeletal components that precedes cell death. Here was present our results in HeLa and G361 cells subjected to sublethal PDT treatments using α,β,χ,δ porphyrin-Tetrakis (1-methylpyridinium-4-yl) p-Toluenesulfonate porphyrin (TMPyP)...
June 27, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28668519/natural-alkaloid-luotonin-a-and-its-affixed-acceptor-molecules-serum-albumin-binding-studies
#19
Mookkandi Palsamy Kesavan, Gujuluva Gangatharan Vinoth Kumar, Kandasamy Anitha, Lokesh Ravi, Jeyaraj Dhaveethu Raja, Gurusamy Rajagopal, Jegathalaprathaban Rajesh
Effective interaction of natural alkaloid Luotonin A (L) and its affixed acceptor molecules 1 and 2 with donor molecule as Bovine serum albumin (BSA) at various pH (4.0, 7.4 and 10.0) medium have been demonstrated using various conventional spectroscopic techniques. These analyses provide some valuable features on the interaction between BSA and acceptor molecules (L, 1 and 2). From the absorption and fluorescence spectral titration studies, the formation of ground-state complexes between the acceptor molecules (L, 1 and 2) and the BSA have been confirmed...
June 27, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28668518/cytotoxic-effect-of-tdz-on-human-cervical-cancer-cells
#20
Gansukh Enkhtaivan, Doo Hwan Kim, Muthuraman Pandurangan
The present study investigates the anticancer activity of Thidiazuron (TDZ). Anticancer activity of TDZ was evaluated in cervical carcinoma cells (HeLa cells). Sulforhodamine-B (SRB) assay indicates that TDZ was about 100 times more toxic to the cancer cell than normal cells. TUNEL assay showed TDZ induced DNA damage in tumor cells. The loss of mitochondrial membrane potential (MMP) in cancer cells was observed following TDZ treatment. The Bax and bcl-2 gene expression ratio are highly responsible for the regulation of MMP balance, and these ratio was significantly altered following TDZ treatment...
June 27, 2017: Journal of Photochemistry and Photobiology. B, Biology
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