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https://www.readbyqxmd.com/read/28737290/integration-of-ir-808-sensitized-upconversion-nanostructure-and-mos2-nanosheet-for-808-nm-nir-light-triggered-phototherapy-and-bioimaging
#1
Jiating Xu, Arif Gulzar, Yuhui Liu, Huiting Bi, Shili Gai, Bin Liu, Dan Yang, Fei He, Piaoping Yang
Near infrared (NIR) light triggered phototherapy including photothermal therapy (PTT) and photodynamic therapy (PDT) affords superior outcome in cancer treatment. However, the reactive oxygen species (ROS) generated by NIR-excited upconversion nanostructure is limited by the feeble upconverted light which cannot activate PDT agents efficiently. Here, an IR-808 dye sensitized upconversion nanoparticle (UCNP) with a chlorin e6 (Ce6)-functionalized silica layer is developed for PDT agent. The two booster effectors (dye-sensitization and core-shell enhancement) synergistically amplify the upconversion efficiency, therefore achieving superbright visible emission under low 808 nm light excitation...
July 24, 2017: Small
https://www.readbyqxmd.com/read/28736161/-immortalization-of-erythroid-progenitors-for-in-vitro-large-scale-red-cell-production
#2
A Caulier, L Guyonneau Harmand, L Garçon
Population ageing and increase in cancer incidence may lead to a decreased availability of red blood cell units. Thus, finding an alternative source of red blood cells is a highly relevant challenge. The possibility to reproduce in vitro the human erythropoiesis opens a new era, particularly since the improvement in the culture systems allows to produce erythrocytes from induced-Pluripotent Stem Cells (iPSCs), or CD34(+) Hematopoietic Stem Cells (HSCs). iPSCs have the advantage of in vitro self-renewal, but lead to poor amplification and maturation defects (high persistence of nucleated erythroid precursors)...
July 20, 2017: Transfusion Clinique et Biologique: Journal de la Société Française de Transfusion Sanguine
https://www.readbyqxmd.com/read/28735519/expression-of-the-hpv18-e6-oncoprotein-induces-dna-damage
#3
Elva I Cortés Gutiérrez, Catalina García-Vielma, Adriana Aguilar-Lemarroy, Veronica Vallejo-Ruíz, Patricia Piña-Sánchez, Pablo Zapata-Benavides, Jaime Gosalvez
This study investigated possible variations in DNA damage in HeLa cells with silenced expression of the HPV/E6 oncogene compared with HeLa cells with normal expression of the E6 oncogene using the DNA breakage detection-fluorescence in situ hybridization (DBD-FISH) technique and a whole human genome DNA probe. The variable levels of DNA breaks present were measured quantitatively using image analysis after whole-genome DNA hybridization. HeLa cells with silenced expression of the HPV18/E6 oncogene showed a significant decrease in DNA damage compared with parental cells with normal expression of the E6 oncogene...
June 15, 2017: European Journal of Histochemistry: EJH
https://www.readbyqxmd.com/read/28733876/human-papillomavirus-type-8-e7-protein-binds-nuclear-myosin-1c-and-downregulates-the-expression-of-pre-rrna
#4
Evelyn Oswald, Eileen Reinz, Renate Voit, François Aubin, Angel Alonso, Eeva Auvinen
Our aim was to search for new cellular binding partners for the E6 and E7 oncogenes of beta human papillomaviruses (HPV), whose direct role in skin carcinogenesis has not been thoroughly investigated. By employing glutathione S-transferase pulldown and coimmunoprecipitation, we identified nuclear myosin 1c as a binding partner of HPV 8 E7 protein. As nuclear myosin 1c is an essential component of the RNA polymerase I transcription complex, we studied the effects of HPV 8 E7 protein expression on ribosomal RNA (rRNA) expression...
July 21, 2017: Virus Genes
https://www.readbyqxmd.com/read/28731112/carrier-free-self-assembled-pure-drug-nanorods-composed-of-10-hydroxycamptothecin-and-chlorin-e6-for-combinatorial-chemo-photodynamic-antitumor-therapy-in-vivo
#5
Yan Wen, Wei Zhang, Ningqiang Gong, Yi-Feng Wang, Hong-Bo Guo, Weisheng Guo, Paul C Wang, Xing-Jie Liang
Carrier-free nanodrugs formulated from the supramolecular self-assembly of pure drug molecules have emerged as an innovative and promising strategy for tumor therapy. We report herein a new and simple method to directly assemble a small hydrophobic anticancer drug, 10-hydroxycamptothecin (HCPT), with a photosensitizer chlorin e6 (Ce6) to form stable, discrete nanorods (NRs), which not only circumvent the extreme hydrophobicity of HCPT but also incorporate two different modalities into one delivery system for combination therapy...
July 21, 2017: Nanoscale
https://www.readbyqxmd.com/read/28729656/endolysosomal-targeting-of-a-clinical-chlorin-photosensitiser-for-light-triggered-delivery-of-nano-sized-medicines
#6
Elnaz Yaghini, Ruggero Dondi, Kunal M Tewari, Marilena Loizidou, Ian M Eggleston, Alexander J MacRobert
A major problem with many promising nano-sized biotherapeutics including macromolecules is that owing to their size they are subject to cellular uptake via endocytosis, and become entrapped and then degraded within endolysosomes, which can significantly impair their therapeutic efficacy. Photochemical internalisation (PCI) is a technique for inducing cytosolic release of the entrapped agents that harnesses sub-lethal photodynamic therapy (PDT) using a photosensitiser that localises in endolysosomal membranes...
July 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28727525/trends-in-prescription-opioids-detected-in-fatally-injured-drivers-in-6-us-states-1995-2015
#7
Stanford Chihuri, Guohua Li
OBJECTIVES: To assess the time trends in prescription opioids detected in fatally injured drivers. METHODS: We analyzed 1995 to 2015 Fatality Analysis Reporting System data from California, Hawaii, Illinois, New Hampshire, Rhode Island, and West Virginia of toxicological tests for drivers fatally injured within 1 hour of a crash (n = 36 729). We used the Cochran-Armitage test for trend to assess the statistical significance of changes in the prevalence of prescription opioids detected in these drivers over time...
July 20, 2017: American Journal of Public Health
https://www.readbyqxmd.com/read/28727523/from-lead-exposure-in-early-childhood-to-adolescent-health-a-chicago-birth-cohort
#8
Alix S Winter, Robert J Sampson
OBJECTIVES: To assess the relationships between childhood lead exposure and 3 domains of later adolescent health: mental, physical, and behavioral. METHODS: We followed a random sample of birth cohort members from the Project on Human Development in Chicago Neighborhoods, recruited in 1995 to 1997, to age 17 years and matched to childhood blood test results from the Department of Public Health. We used ordinary least squares regression, coarsened exact matching, and instrumental variables to assess the relationship between average blood lead levels in childhood and impulsivity, anxiety or depression, and body mass index in adolescence...
July 20, 2017: American Journal of Public Health
https://www.readbyqxmd.com/read/28727519/obesity-and-overweight-in-american-indian-and-alaska-native-children-2006-2015
#9
Ann Bullock, Karen Sheff, Kelly Moore, Spero Manson
OBJECTIVES: To estimate obesity and overweight prevalence in American Indian and Alaska Native (AI/AN) children across genders, ages, and geographic regions in the Indian Health Service active clinical population. METHODS: We obtained data from the Indian Health Service National Data Warehouse. At least 184 000 AI/AN children aged 2 to 19 years had body mass index data for each year studied, 2006 to 2015. We calculated body mass index percentiles with the 2000 Centers for Disease Control and Prevention growth charts...
July 20, 2017: American Journal of Public Health
https://www.readbyqxmd.com/read/28724760/uv-radiation-activates-toll-like-receptor-9-expression-in-primary-human-keratinocytes-an-event-inhibited-by-human-papillomavirus-type-38-e6-and-e7-oncoproteins
#10
Laura Pacini, Maria Grazia Ceraolo, Assunta Venuti, Giusi Melita, Uzma A Hasan, Rosita Accardi, Massimo Tommasino
Several lines of evidence indicate that cutaneous human papillomavirus (HPV) types belonging to the beta genus of the HPV phylogenetic tree synergise with UV radiation in the development of skin cancer. Accordingly, the E6 and E7 oncoproteins from some beta HPV types are able to deregulate pathways related to immune response and cellular transformation. Toll-like receptor 9 (TLR9), in addition to playing a role in innate immunity, has been shown to be involved in the cellular stress response. Using primary human keratinocytes (PHKs) as experimental models, we have shown that UV irradiation (and other cellular stresses) activates TLR9 expression...
July 19, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28722212/active-human-papillomavirus-involvement-in-barrett-s-dysplasia-and-oesophageal-adenocarcinoma-is-characterized-by-wild-type-p53-and-aberrations-of-the-retinoblastoma-protein-pathway
#11
Shanmugarajah Rajendra, Tao Yang, Wei Xuan, Prateek Sharma, Darren Pavey, Cheong Soon Lee, Son Le, Josephine Collins, Bin Wang
We have previously demonstrated that transcriptionally active high-risk HPV (hr-HPV) is strongly incriminated in Barrett's dysplasia (BD) and oesophageal adenocarcinoma (OAC) using mainly fresh frozen tissue. This study aimed to identify biomarkers of active HPV infection in Barrett's metaplasia, (BM)/BD/OAC by immunohistochemical staining (IHC) of formalin-fixed paraffin embedded (FFPE) tissue for aberrations of p53 and the retinoblastoma (pRb) pathway which are targets for the viral oncoproteins, E6/E7 respectively...
July 19, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28720772/blockade-of-axl-signaling-ameliorates-hpv16e6-mediated-tumorigenecity-of-cervical-cancer
#12
Eun-Hee Lee, Kon-Young Ji, Eun-Mi Kim, Su-Man Kim, Hyeong-Woo Song, Ha-Rim Choi, Byung Yeoup Chung, Hyo Jin Choi, Hyoung-Woo Bai, Hyung-Sik Kang
Axl receptor tyrosine kinase is involved in the tumorigenesis and metastasis of many cancers. Axl expression was markedly higher in human papilloma virus type 16E6 (HPV16E6)-overexpressing HeLa (HE6F) cells and lower in HPV16E6-suppressing CaSki (CE6R) cells than in the controls. SiRNA-mediated knockdown of E6 expression led to increased phosphatase and tensin homolog (PTEN) phosphorylation at Ser380 and attenuated AKT phosphorylation. Expression of membrane-associated guanylate kinase inverted-2 (MAGI-2), an E6-induced degradation target, was induced in E6-siRNA-transfected cells...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28720459/investigating-the-role-of-human-papillomavirus-in-lung-cancer
#13
E Argyri, E Tsimplaki, C Marketos, G Politis, E Panotopoulou
Lung cancer is the leading cancer worldwide among men and women with morbidity reaching 1.6 million. Human Papillomavirus is the causal factor of cervical cancer while its association with others is still under investigation. The purpose of our study is to examine the presence of HPV DNA as well as high-risk E6/E7 mRNA in patients with lung cancer. Lung tissues were collected during bronchoscopy and tested for HPV DNA and E6/E7 mRNA. 67 lung tissue samples were analysed. The age range was 49-85 years old (y...
June 2017: Papillomavirus Research
https://www.readbyqxmd.com/read/28720295/equine-papillomavirus-type-2-an-equine-equivalent-to-human-papillomavirus-16
#14
S Sykora, C Jindra, M Hofer, R Steinborn, S Brandt
In horses, squamous cell carcinomas (SCC) commonly affect the external genitals. There is growing evidence that equine papillomavirus type 2 (EcPV2) infection promotes disease development. To assess the possible association of EcPV2 with equine SCCs of the head (HSCC), 15 HSCC DNA samples were screened by E6/E7, E2, and LCR PCR and amplicons were analysed for sequence variations. The physical form of EcPV2 in HSCC, genital lesions, and smegma from horses with SCC was then addressed using EcPV2 immunocapture PCR (IC/PCR) for detection of virion, and E6 vs...
July 2017: Veterinary Journal
https://www.readbyqxmd.com/read/28720067/hpv16-e6-e7-upregulates-hif-2%C3%AE-and-vegf-by-inhibiting-lkb1-in-lung-cancer-cells
#15
Jian-Shuang Shao, Jian Sun, Shiyu Wang, Katherine Chung, Jin Tong Du, Jason Wang, Xue-Shan Qiu, En-Hua Wang, Guang-Ping Wu
Long-term persistent infection of HPV16 E6/E7 is frequently associated with lung cancers, especially in non-smokers and in Asians. However, molecular mechanisms of HPV16 E6/E7 induction of lung cancer are not fully understood. Using bi-directional genetic manipulation and four well-established lung cancer cell lines, we showed HPV16 E6/E7 downregulated expression of liver kinase B1 at both protein and messenger RNA levels; liver kinase B1 downregulated hypoxia-inducible factor 2α at protein level but not at messenger RNA level, and hypoxia-inducible factor 2α upregulated vascular endothelial growth factor at both protein and messenger RNA levels...
July 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28714529/immunologic-responses-to-a-novel-dna-vaccine-targeting-human-papillomavirus-11-e6e7
#16
Julie Ahn, Shiwen Peng, Chien-Fu Hung, Richard B S Roden, Tzyy-Choou Wu, Simon R Best
OBJECTIVES/HYPOTHESIS: Recurrent respiratory papillomatosis (RRP) is a benign disease caused by human papillomavirus (HPV) types 6 and 11. Although a prophylactic vaccine against RRP is available, a therapeutic vaccine is needed to treat those already infected. The objective of our study was to design and test a DNA vaccine targeting HPV11 proteins. STUDY DESIGN: Preclinical scientific investigation. METHODS: A DNA vaccine encoding the HPV11 E6 and E7 genes linked to calreticulin (CRT) was generated...
July 17, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28712875/apical-constriction-in-distal-visceral-endoderm-cells-initiates-global-collective-cell-rearrangement-in-embryonic-visceral-endoderm-to-form-anterior-visceral-endoderm
#17
Go Shioi, Hideharu Hoshino, Takaya Abe, Hiroshi Kiyonari, Kazuki Nakao, Wenxiang Meng, Yasuhide Furuta, Toshihiko Fujimori, Shinichi Aizawa
The behavior of visceral endoderm cells was examined as the anterior visceral endoderm (AVE) formed from the distal visceral endoderm (DVE) using the mouse lines R26-H2B-EGFP and R26-PHA7-EGFP to visualize cell nuclei and adherens junction, respectively. The analysis using R26-H2B-EGFP demonstrated global cell rearrangement that was not specific to the DVE cells in the monolayer embryonic visceral endoderm sheet; each population of the endoderm cells moved collectively in a swirling movement as a whole. Most of the AVE cells at E6...
July 13, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28712599/effects-of-woody-peat-and-superphosphate-on-compost-maturity-and-gaseous-emissions-during-pig-manure-composting
#18
Difang Zhang, Wenhai Luo, Jing Yuan, Guoxue Li, Yuan Luo
This study investigated the effect of calcium superphosphate on compost maturity and gaseous emissions during pig manure composting with woody peat as the bulking agent. Two treatments were conducted with or without the addition of calcium superphosphate (10% dry weight of the composting mass), which were denoted as the control and superphosphate-amended treatment, respectively. Results show that the composting temperature of both treatments was higher than 50°C for more than 5days, which is typically required for pathogen destruction during manure composting...
July 13, 2017: Waste Management
https://www.readbyqxmd.com/read/28710417/talen-based-hpv-e7-editing-triggers-necrotic-cell-death-in-cervical-cancer-cells
#19
Sumitra Shankar, Deepti Prasad, Rahul Sanawar, Ani V Das, M Radhakrishna Pillai
Human Papillomavirus E7 and E6 oncoproteins have been considered as suitable candidate anti-viral targets since they cause malignant conversion in cervical cancers. Transcription Activator-Like Effector Nucleases (TALENs) are recent editing tools to knockout genes by inducing double stranded breaks at specific sites in the genome. In here, we have designed specific TALENs to target E7 and analyzed their efficiency in inducing cell death in cervical cancer cells. We found that designed TALENs could yield about 10-12% editing activity as observed from T7E1 and nuclease resistance assays...
July 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28708997/vaccine-mediated-protection-against-zika-virus-induced-congenital-disease
#20
Justin M Richner, Brett W Jagger, Chao Shan, Camila R Fontes, Kimberly A Dowd, Bin Cao, Sunny Himansu, Elizabeth A Caine, Bruno T D Nunes, Daniele B A Medeiros, Antonio E Muruato, Bryant M Foreman, Huanle Luo, Tian Wang, Alan D Barrett, Scott C Weaver, Pedro F C Vasconcelos, Shannan L Rossi, Giuseppe Ciaramella, Indira U Mysorekar, Theodore C Pierson, Pei-Yong Shi, Michael S Diamond
The emergence of Zika virus (ZIKV) and its association with congenital malformations has prompted the rapid development of vaccines. Although efficacy with multiple viral vaccine platforms has been established in animals, no study has addressed protection during pregnancy. We tested in mice two vaccine platforms, a lipid nanoparticle-encapsulated modified mRNA vaccine encoding ZIKV prM and E genes and a live-attenuated ZIKV strain encoding an NS1 protein without glycosylation, for their ability to protect against transmission to the fetus...
July 13, 2017: Cell
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