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Protoporphyrin ix

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https://www.readbyqxmd.com/read/28821132/the-effect-of-%C3%AE-cyclodextrin-on-poly-pseudo-rotaxane-nanoparticles-self-assembled-by-protoporphyrin-modified-poly-ethylene-glycol-for-anticancer-drug-delivery
#1
Taotao Xu, Junhua Li, Jun Cao, Wenxia Gao, Li Li, Bin He
Poly(pseudo)rotaxane (PPR) nanoparticles was facilely prepared using poly(ethylene glycol) (PEG) modified with protoporphyrin (PpIX) and α-cyclodextrin (α-CD) via host-guest interaction, the effect of α-CD number on the nanoparticle properties was investigated. The PEG with protoporphyrin (PEG-PpIX) end capping was synthesized via coupling reaction and the poly(pseudo)rotaxane nanoparticles with different amount of α-CD were fabricated by host-guest interaction between mPEG-PpIX and α-CDs. The final product was characterized by nuclear magnetic spectrum ((1)H NMR), X-ray diffraction (XRD), atomic force microscope (AFM) and dynamic light scattering (DLS)...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28820893/a-computational-method-for-the-identification-of-candidate-drugs-for-non-small-cell-lung-cancer
#2
Lei Chen, Jing Lu, Tao Huang, Yu-Dong Cai
Lung cancer causes a large number of deaths per year. Until now, a cure for this disease has not been found or developed. Finding an effective drug through traditional experimental methods invariably costs millions of dollars and takes several years. It is imperative that computational methods be developed to integrate several types of existing information to identify candidate drugs for further study, which could reduce the cost and time of development. In this study, we tried to advance this effort by proposing a computational method to identify candidate drugs for non-small cell lung cancer (NSCLC), a major type of lung cancer...
2017: PloS One
https://www.readbyqxmd.com/read/28817256/tailorable-exciton-transport-in-doped-peptide-amphiphile-assemblies
#3
Lee A Solomon, Matthew E Sykes, Yimin A Wu, Richard D Schaller, Gary P Wiederrecht, Harry Christopher Fry
Light-harvesting biomaterials are an attractive target in photovoltaics, photocatalysis, and artificial photosynthesis. Through peptide self-assembly, complex nanostructures can be engineered to study the role of chromophore organization during light absorption and energy transport. To this end, we demonstrate the one-dimensional transport of excitons along naturally occurring, light-harvesting, Zn-protoporphyrin IX chromophores within self-assembled peptide-amphiphile nanofibers. The internal structure of the nanofibers induces packing of the porphyrins into linear chains...
August 17, 2017: ACS Nano
https://www.readbyqxmd.com/read/28815553/osteoporosis-in-erythropoietic-protoporphyria-patients
#4
M Biewenga, R H S Matawlie, E C H Friesema, H Koole-Lesuis, M Langeveld, J H P Wilson, J G Langendonk
BACKGROUND: Erythropoietic protoporphyria is a rare metabolic disease with painful photosensitivity due to protoporphyrin IX accumulation, resulting in lifelong light avoidance behaviour. OBJECTIVES: The aim of this study was to evaluate bone mineral density and known osteoporosis risk factors in erythropoietic protoporphyria patients. METHODS: In this cross-sectional study all erythropoietic protoporphyria patients attending the Erasmus MC outpatient clinic that had undergone bone mineral density measurements were included...
August 17, 2017: British Journal of Dermatology
https://www.readbyqxmd.com/read/28812752/extending-charge-separation-lifetime-and-distance-in-patterned-dye-sensitized-sno2-tio2-%C3%AE-m-thin-films
#5
Valeria Saavedra Becerril, Elin Sundin, Mokhtar Mapar, Maria Abrahamsson
A simple method for the preparation of patterned dye-sensitized SnO2-TiO2 thin films, designed to prolong the lifetime of the interfacial charge separated state is presented. Using microfluidic technology, the thin films were sensitized with the organic sensitizer D35 such that they contain SnO2-TiO2 areas with dye and SnO2 dye-free areas at which injected electrons can be accumulated. Single wavelength transient absorption spectroscopy confirmed significantly extended charge separation lifetime at the dye-semiconductor interface...
August 16, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28808058/reductions-in-the-mitochondrial-abc-transporter-abcb10-affect-the-transcriptional-profile-of-heme-biosynthesis-genes
#6
Alexandra Seguin, Naoko Takahashi-Makise, Yvette Y Yien, Nicholas C Huston, Jared C Whitman, Gabriel Musso, Jared A Wallace, Thomas Bradley, Hector Bergonia, Martin D Kafina, Mitsuyo Matsumoto, Kazuhiko Igarashi, John D Phillips, Barry H Paw, Jerry Kaplan, Diane M Ward
ATP-binding cassette subfamily B member 10 (Abcb10) is a mitochondrial ABC transporter that complexes with mitoferrin1 and ferrochelatase to enhance heme biosynthesis in developing red blood cells. Reductions in Abcb10 levels have been shown to reduce mitoferrin1 protein levels and iron import into mitochondria resulting in reduced heme biosynthesis. As an ABC transporter, Abcb10 binds and hydrolyzes ATP, but its transported substrate is unknown. Here, we determined that decreases in Abcb10 did not result in protoporphyrin IX accumulation in morphant treated zebrafish embryos nor in differentiated Abcb10-specific shRNA murine Friend erythroleukemia (MEL) cells in which Abcb10 was specifically silenced with shRNA...
August 14, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28805232/the-protective-effect-of-heme-oxygenase-1-against-intestinal-barrier-dysfunction-in-cholestatic-liver-injury-is-associated-with-nf-%C3%AE%C2%BAb-inhibition
#7
Lijing Zhang, Zhenling Zhang, Bojia Liu, Yanling Jin, Yan Tian, Yi Xin, Zhijun Duan
Heme oxygenase-1 (HO-1) is reported to protect against liver injury, but little is known about its effect on the intestinal barrier in cholestatic liver injury. In this study, we investigated the effects of HO-1 and its enzymatic by-product on intestinal barrier dysfunction in bile duct ligation (BDL) rats and explored the possible mechanism. The HO-1 inducer cobalt protoporphyrin (CoPP) and carbon monoxide-releasing molecule-2 (CORM-2) were used; the expression levels of tight junction (TJ) proteins, intestinal inflammation and NF-κB p65 were measured...
August 9, 2017: Molecular Medicine
https://www.readbyqxmd.com/read/28777025/red-light-excitation-of-protoporphyrin-ix-fluorescence-for-subsurface-tumor-detection
#8
David W Roberts, Jonathan D Olson, Linton T Evans, Kolbein K Kolste, Stephen C Kanick, Xiaoyao Fan, Jaime J Bravo, Brian C Wilson, Frederic Leblond, Mikael Marois, Keith D Paulsen
OBJECTIVE The objective of this study was to detect 5-aminolevulinic acid (ALA)-induced tumor fluorescence from glioma below the surface of the surgical field by using red-light illumination. METHODS To overcome the shallow tissue penetration of blue light, which maximally excites the ALA-induced fluorophore protoporphyrin IX (PpIX) but is also strongly absorbed by hemoglobin and oxyhemoglobin, a system was developed to illuminate the surgical field with red light (620-640 nm) matching a secondary, smaller absorption peak of PpIX and detecting the fluorescence emission through a 650-nm longpass filter...
August 4, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28768046/carbon-monoxide-released-from-its-pharmacological-donor-tricarbonyldichlororuthenium-ii-dimer-corm-2-accelerates-the-healing-of-pre-existing-gastric-ulcers
#9
Magierowski Marcin, Magierowska Katarzyna, Hubalewska-Mazgaj Magdalena, Sliwowski Zbigniew, Ginter Grzegorz, Pajdo Robert, Chmura Anna, Kwiecien Slawomir, Brzozowski Tomasz
BACKGROUND AND PURPOSE: Carbon monoxide (CO), gaseous mediator produced by heme oxygenases (HO), has been shown to prevent stress-, ethanol-, aspirin- or alendronate-induced gastric damage, however, its role in the gastric ulcer healing has not been fully explained. We investigated whether CO released from tricarbonyldichlororuthenium (II) dimer (CORM-2) can affect gastric ulcer healing and determined mechanisms involved in healing action of this compound. EXPERIMENTAL APPROACH: Gastric ulcers were induced in Wistar rats by serosal application of acetic acid...
August 2, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28752174/transferrin-coated-magnetic-upconversion-nanoparticles-for-efficient-photodynamic-therapy-with-near-infrared-irradiation-and-luminescence-bioimaging
#10
Dan Wang, Lin Zhu, Yuan Pu, Jie-Xin Wang, Jian-Feng Chen, Liming Dai
In the present study, we devised a green-synthesis route to NaYF4:Gd(3+),Yb(3+),Er(3+) upconversion nanoparticles (UCNPs) by using eco-friendly paraffin liquid, instead of 1-octadecene, as a high boiling non-coordinating solvent. A multifunctional nanoplatform was then developed by coating UCNPs with biocompatible transferrin (TRF) for magnetically-assisted and near-infrared light induced photodynamic therapy and bioimaging. Protoporphyrin IX (PpIX), a clinically approved photodynamic therapy agent, was loaded into the shell layer of the TRF-coated UCNPs (UCNP@TRF nanoparticles), which can be efficiently taken up by cancer cells for photodynamic therapy...
July 28, 2017: Nanoscale
https://www.readbyqxmd.com/read/28750754/physiological-considerations-acting-on-triplet-oxygen-for-explicit-dosimetry-in-photodynamic-therapy
#11
Víctor Sánchez, María Paulina Romero, Sebastião Pratavieira, César Costa
The aims of this study were to determine the spatial and temporal theoretical distribution of the concentrations of Protoporphyrin IX, (3)O2 and doses of (1)O2. The type II mechanism and explicit dosimetry in photodynamic therapy were used. Furthermore, the mechanism of respiration and cellular metabolism acting on (3)O2 were taken into account. The dermis was considered as an absorbing and a scattering medium. An analytical solution was used for light diffusion in the skin. The photophysical, photochemical and biological effects caused by PDT with the initial irradiances of 20, 60 and 150mW/cm(2) were studied for a time of exposure of 20min...
July 24, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28740143/downregulation-of-alas1-by-nicarbazin-treatment-underlies-the-reduced-synthesis-of-protoporphyrin-ix-in-shell-gland-of-laying-hens
#12
Sami Samiullah, Juliet Roberts, Shu-Biao Wu
Shell colour is an important trait for eggs and an understanding of pigment deposition will assist potential management of egg shell colour loss. We demonstrated that nicarbazin feeding down-regulated ALAS1 and reduced protoporphyrin IX (PP IX) in both shell gland and eggshell, indicating the role of nicarbazin in inhibiting the synthesis of PP IX. Additionally, the expression levels of the genes did not show sequential upregulation in the same order of diurnal time-points (TP) during egg formation. The gene SLC25A38, responsible for transporting glycine from cytoplasm to mitochondria, and the gene ALAS1, encoding rate-limiting enzyme (delta-aminolevulinic acid synthase 1), had higher expression at 15 hr, as compared with 2, 5 and 23...
July 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28735260/aetiological-investigations-in-early-developmental-impairment-are-they-worth-it
#13
Anthony Richard Hart, Ruchi Sharma, Mark Atherton, Samer Alabed, Sally Simpson, Stuart Barfield, Judith Cohen, Nicholas McGlashan, Asha Ravi, Michael James Parker, Daniel Ja Connolly
OBJECTIVE: To study the frequency a diagnosis is made in children with early developmental impairment (EDI), and the contribution made to diagnosis by specific investigations. DESIGN: Retrospective case note review. SETTING: Community, neurodisability and neurology department at a UK tertiary centre. PARTICIPANTS: Children referred to determine the aetiology of EDI where a cause was not evident on history and examination...
July 22, 2017: Archives of Disease in Childhood
https://www.readbyqxmd.com/read/28730260/longer-survival-of-a-patient-with-glioblastoma-resected-with-5-aminolevulinic-acid-5-ala-guided-surgery-and-foreign-body-reaction-to-polyglycolic-acid-pga-suture
#14
Raluca Maria Munteanu, Lucian Eva, Bogdan IonuŢ DobrovăŢ, Alin Constantin Iordache, Liviu Pendefunda, Nicoleta Dumitrescu, Doina Mihăilă, Cristina Maria Gavrilescu, Elena Şapte, Ion Poeată
In recent years, there is a growing evidence that using 5-aminolevulinic acid (5-ALA)-guided resection of a cerebral glioblastoma, associated with chemoradiotherapy determine a prolonged survival of these patients, even though this period do not exceed 15 months. 5-ALA is a natural biochemical precursor of heme that is metabolized to fluorescent porphyrins, particularly protoporphyrin IX (PPIX) and no foreign reaction were noted until now. However, foreign body reaction developing in neurosurgery is documented in a few number of cases to suture material, surgical hemostatic material, or surgical glove starch, but up to now we could not find any article about granulomatous inflammation to polyglycolic acid (PGA) suture after brain tumor resection...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/28726046/spectrophotometric-photodynamic-detection-involving-extracorporeal-treatment-with-hexaminolevulinate-for-bladder-cancer-cells-in-voided-urine
#15
Yasushi Nakai, Toshiyuki Ozawa, Fumiko Mizuno, Sayuri Onishi, Takuya Owari, Syunta Hori, Yosuke Morizawa, Yosihiro Tatsumi, Makito Miyake, Nobumichi Tanaka, Daisuke Tsuruta, Kiyohide Fujimoto
PURPOSE: To evaluate the feasibility of hexaminolevulinate (HAL) for the photodynamic detection of cancer cells in voided urine. METHODS: This study included 50 patients with bladder cancer that was confirmed histologically after transurethral resection (bladder cancer group) and 50 outpatients without a history of urothelial carcinoma or cancer-related findings (no malignancy group). One third of the voided urine samples were incubated with aminolevulinic acid (ALA-treated samples), one third were incubated with HAL (HAL-treated samples), and the remaining samples were incubated without treatment (untreated samples)...
July 19, 2017: Journal of Cancer Research and Clinical Oncology
https://www.readbyqxmd.com/read/28715873/subcritical-water-hydrolyzed-fish-collagen-ameliorates-survival-of-endotoxemic-mice-by-inhibiting-hmgb1-release-in-a-ho-1-dependent-manner
#16
Min Young Ahn, Jung Seok Hwang, Sun Ah Ham, Jinwoo Hur, Yeonji Jo, SangYoon Lee, Mi-Jung Choi, Sung Gu Han, Han Geuk Seo
To investigate potential mechanisms underlying the bioactivity of hydrolyzed fish collagen, we examined the anti-inflammatory actions of subcritical water-hydrolyzed fish collagen (SWFC) in lipopolysaccharide (LPS)-triggered inflammation and endotoxemia. SWFC markedly inhibited LPS-stimulated release of high mobility group box 1 (HMGB1) in murine RAW264.7 macrophages, along with decreased cytosolic translocation of HMGB1. Both the protein and mRNA levels of heme oxygenase-1 (HO-1) were significantly upregulated in SWFC-treated RAW 264...
September 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28704474/dietary-hemoglobin-rescues-young-piglets-from-severe-iron-deficiency-anemia-duodenal-expression-profile-of-genes-involved-in-heme-iron-absorption
#17
Robert Staroń, Paweł Lipiński, Małgorzata Lenartowicz, Aleksandra Bednarz, Anna Gajowiak, Ewa Smuda, Wojciech Krzeptowski, Marek Pieszka, Tamara Korolonek, Iqbal Hamza, Dorine W Swinkels, Rachel P L Van Swelm, Rafał R Starzyński
Heme is an efficient source of iron in the diet, and heme preparations are used to prevent and cure iron deficiency anemia in humans and animals. However, the molecular mechanisms responsible for heme absorption remain only partially characterized. Here, we employed young iron-deficient piglets as a convenient animal model to determine the efficacy of oral heme iron supplementation and investigate the pathways of heme iron absorption. The use of bovine hemoglobin as a dietary source of heme iron was found to efficiently counteract the development of iron deficiency anemia in piglets, although it did not fully rebalance their iron status...
2017: PloS One
https://www.readbyqxmd.com/read/28701797/antimicrobial-effect-of-blue-light-using-porphyromonas-gingivalis-pigment
#18
Ayaka Yoshida, Haruka Sasaki, Toshizo Toyama, Mitsunori Araki, Jun Fujioka, Koichi Tsukiyama, Nobushiro Hamada, Fumihiko Yoshino
The development of antibiotics cannot keep up with the speed of resistance acquired by microorganisms. Recently, the development of antimicrobial photodynamic therapy (aPDT) has been a necessary antimicrobial strategy against antibiotic resistance. Among the wide variety of bacteria found in the oral flora, Porphyromonas gingivalis (P. gingivalis) is one of the etiological agents of periodontal disease. aPDT has been studied for periodontal disease, but has risks of cytotoxicity to normal stained tissue. In this study, we performed aPDT using protoporphyrin IX (PpIX), an intracellular pigment of P...
July 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28697633/zinc-l-carnosine-suppresses-inflammatory-responses-in-lipopolysaccharide-induced-raw-264-7-murine-macrophages-cell-line-via-activation-of-nrf2-ho-1-signaling-pathway
#19
Theng Choon Ooi, Kok Meng Chan, Razinah Sharif
CONTEXT: Zinc L-carnosine (ZnC) is a chelate of Zn and L-carnosine and is used clinically in the treatment of peptic ulcer. OBJECTIVE: In this study, we aim to investigate the involvement of heme oxygenase-1 (HO-1) in the anti-inflammatory effects of ZnC in lipopolysaccharide (LPS)-induced RAW 264.7 murine macrophages. MATERIALS AND METHODS: We used immunoblotting analysis to evaluate the involvement of HO-1 in the anti-inflammatory effects of ZnC and the signaling pathway involved was measured using Dual luciferase reporter assay...
July 11, 2017: Immunopharmacology and Immunotoxicology
https://www.readbyqxmd.com/read/28693272/metformin-enhances-the-cytotoxicity-of-5-aminolevulinic-acid-mediated-photodynamic-therapy-in-vitro
#20
Tomohiro Osaki, Inoru Yokoe, Kiwamu Takahashi, Katsushi Inoue, Masahiro Ishizuka, Tohru Tanaka, Kazuo Azuma, Yusuke Murahata, Takeshi Tsuka, Norihiko Itoh, Tomohiro Imagawa, Yoshiharu Okamoto
The biguanide metformin is a drug widely used for the treatment of type 2 diabetes. Metformin enhances the cytotoxicity of chemotherapy by promoting the adenosine monophosphate-activated protein kinase (AMPK) autophagy signaling pathway. Photodynamic therapy (PDT) with 5-aminolevulinic acid (5-ALA), a precursor of protoporphyrin IX (PpIX), leads to apoptosis when PpIX accumulates in the mitochondria, and also leads to autophagy through activation of AMPK. In the present study, the effect of metformin in combination with 5-ALA-PDT was evaluated in vitro in KLN205 lung cancer cells...
July 2017: Oncology Letters
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