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https://www.readbyqxmd.com/read/29143344/down-regulation-of-p16-and-mgmt-promotes-the-anti-proliferative-and-pro-apoptotic-effects-of-5-aza-dc-and-radiation-on-cervical-cancer-cells
#1
Guan-di Chen, De-Ying Qian, Zhi-Gang Li, Ge-Ying Fan, Ke-Li You, Yi-Long Wu
Cervical cancer is one of the most common malignancies of the female reproductive system. Therefore, it is critical to investigate the molecular mechanisms involved in the development and progression of cervical cancer. In this study, we stimulated cervical cancer cells with 5-aza-2'-deoxycytidine (5-Aza-dC) and found that this treatment inhibited cell proliferation and induced apoptosis; additionally, methylation of p16 and O-6-methylguanine-DNA methyltransferase (MGMT) was reversed, although their expression was suppressed...
November 15, 2017: Cell Biochemistry and Function
https://www.readbyqxmd.com/read/29143102/diagnostic-performance-of-hpv-e6-e7-mrna-assay-for-detection-of-cervical-high-grade-intraepithelial-neoplasia-and-cancer-among-women-with-ascus-papanicolaou-smears
#2
Chenchen Ren, Yuanhang Zhu, Li Yang, Xiaoan Zhang, Ling Liu, Chunying Ren
PURPOSE: The aim of this study was to investigate the clinical performance of high risk (HR) HPV E6/E7 mRNA assay in detecting cervical high-grade intraepithelial neoplasia and cancer among women with atypical squamous cells of undetermined significance (ASCUS) Papanicolaou (Pap) smears. METHODS: A total of 160 patients with ASCUS who underwent HR-HPV DNA assay, HR-HPV E6/E7 mRNA assay and colposcopy biopsy at Third Affiliated Hospital of Zhengzhou University, China, from December 2015 to March 2017, were enrolled...
November 15, 2017: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/29137858/human-papillomavirus-e6-and-e7-oncoproteins-affect-the-cell-microenvironment-by-classical-secretion-and-extracellular-vesicles-delivery-of-inflammatory-mediators
#3
Marco Iuliano, Giorgio Mangino, Maria Vincenza Chiantore, Maria Simona Zangrillo, Rosita Accardi, Massimo Tommasino, Gianna Fiorucci, Giovanna Romeo
The connection between chronic inflammation and risk of cancer has been supported by several studies. The development of cancer might be a process driven by the presence of a specific combination of inflammatory mediators, including cytokines, chemokines and enzymes, in the tumor microenvironment. Virus-induced tumors, like HPV-induced Squamous Cell Carcinomas, represent a paradigmatic example of the interplay between inflammation, as integral part of the innate antiviral response, and malignant transformation...
November 11, 2017: Cytokine
https://www.readbyqxmd.com/read/29135009/bacterial-species-identifiable-magnetic-nanosystems-for-early-sepsis-diagnosis-and-extracorporeal-photodynamic-blood-disinfection
#4
Jianhao Wang, Hao Wu, Yanmei Yang, Rong Yan, Yuan Zhao, Yanhao Wang, Aihong Chen, Shilong Shao, Pengju Jiang, Yong-Qiang Li
Despite the numerous bacteria detection and elimination techniques available nowadays, sensitive diagnosis and treatment of sepsis (caused by the presence of bacteria in the bloodstream), especially at the early stage, remain big challenges. Here we report a nanosystem for early sepsis diagnosis and complete extracorporeal blood disinfection, based on iron oxide magnetic nanoparticles functionalized with chlorin e6 molecules and bacterial species-identifiable aptamers (Fe3O4-Ce6-Apt). We demonstrate that the Fe3O4-Ce6-Apt nanosystem can achieve simultaneous blood bacterial species identification and enrichment in a single step, and the enriched bacteria can be easily detected with the assistance of fluorescence microscopic determination...
November 14, 2017: Nanoscale
https://www.readbyqxmd.com/read/29134337/recombination-analysis-of-coxsackievirus-b5-genogroup-c
#5
Hongxing Shen
Coxsackievirus B5 (CVB5) is a member of the species Enterovirus B of the genus Enterovirus, family Picornaviridae. Based on its VP1 sequence, CVB5 is divided into four genogroups: A, B, C, and D. From 2002 to 2012, CVB5 serotype genogroup C caused an outbreak of aseptic meningitis in China. In order to study the evolution of CVB5 genogroup C, phylogenetic and recombination analysis was performed using the 399 available enterovirus B genome sequences in the GenBank database. The results indicated that 10 strains of CVB5 serotype genogroup C resulted from recombination between members of genogroup B and echovirus serotype E6, and another 5 strains resulted from recombination between members of genogroup C and serotype CVB4...
November 13, 2017: Archives of Virology
https://www.readbyqxmd.com/read/29130045/the-pdz-binding-motif-of-hpv16-e6-oncoprotein-modulates-the-keratinization-and-stemness-transcriptional-profile-in-vivo
#6
Enoc Mariano Cortés-Malagón, Carmen Palacios-Reyes, Sandra Romero-Cordoba, Daniel Mendoza-Villanueva, Jaime Escobar-Herrera, Odette Verdejo-Torres, Rubén Gerardo Contreras, Gloria Fernádez-Tilapa, Mario Adan Moreno-Eutimio, José Moreno, Alfredo Hidalgo-Miranda, Patricio Gariglio, José Bonilla-Delgado
Objective: The aim of this work was to compare the early gene expression profiles in the skin of HPV16-E6 transgenic mice regulated by the E6 PDZ-binding motif. Materials and Methods: The global transcriptional profiles in dorsal skin biopsies from K14E6 and K14E6Δ146-151 transgenic mice were compared using microarrays. Relevant genes obtained from the most differentially expressed processes were further examined by RT-qPCR, in situ RT-PCR, Western blot, or immunofluorescence...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29129565/human-papillomavirus-hpv-oncoprotein-e6-facilitates-calcineurin-nuclear-factor-for-activated-t-cells-2-nfat2-signaling-to-promote-cellular-proliferation-in-cervical-cell-carcinoma
#7
Babul Moni Ram, Jayashree Dolpady, Rakesh Kulkarni, R Usha, Usha Bhoria, Usha Rani Poli, Mojahidul Islam, Nirupma Trehanpati, Gayatri Ramakrishna
The calcineurin-NFAT signalling pathway regulates cell proliferation, differentiation, and development in diverse cell types and organ systems. Deregulation of calcineurin-NFAT signalling has been reported in leukaemias and few solid tumors such as breast and colon. In the present study, we found elevated calcineurin protein levels and phosphatase activity in cervical cancer cell lines and depletion of the same attenuated cell proliferation. Additionally, nuclear levels of NFAT2, a downstream target of calcineurin, viz, was found elevated in human papillomavirus (HPV) infected cells, HeLa and SiHa, compared to the HPV negative cells, HaCaT and C33A, indicative of its higher DNA binding activity...
November 9, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/29124000/human-papillomavirus-associated-head-and-neck-squamous-cell-carcinoma-controversies-and-new-concepts
#8
REVIEW
Nuzhat Husain, Azfar Neyaz
High-risk human papillomavirus (HR-HPV) is a causative agent for an increasing subset of oropharyngeal squamous cell carcinoma. HPV 16 accounts for 90% of cases. The chance for malignant transformation due to infection with high-risk HPV is proportional to the expression of the viral oncogene products E6 and E7, which inactivate p53 and retinoblastoma (Rb) tumor suppressor functions. P16 is a surrogate marker of HPV associated HNSCC and 2+/3+ expression in more than 75% cells is diagnostic. Molecular demonstration of integrated virus by in situ hybridization is specific but has low sensitivity...
September 2017: Journal of Oral Biology and Craniofacial Research
https://www.readbyqxmd.com/read/29123240/dna-methylation-regulates-tmem16a-ano1-expression-through-multiple-cpg-islands-in-head-and-neck-squamous-cell-carcinoma
#9
Andrey Finegersh, Scott Kulich, Theresa Guo, Alexander V Favorov, Elana J Fertig, Ludmila V Danilova, Daria A Gaykalova, Joseph A Califano, Umamaheswar Duvvuri
ANO1 is a calcium-activated chloride channel that is frequently overexpressed in head and neck squamous cell carcinoma (HNSCC) and other cancers. While ANO1 expression negatively correlates with survival in several cancers, its epigenetic regulation is poorly understood. We analyzed HNSCC samples from TCGA and a separate dataset of HPV+ oropharyngeal squamous cell carcinoma (OPSCC) samples to identify differentially methylated regions. E6 and E7 transfected normal oral keratinocytes (NOK) were used to induce hypermethylation of the ANO1 promoter...
November 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29118270/upregulation-of-pir-gene-expression-induced-by-human-papillomavirus-e6-and-e7-in-epithelial-oral-and-cervical-cells
#10
Diego Carrillo, Juan P Muñoz, Hernán Huerta, Gabriel Leal, Alejandro Corvalán, Oscar León, Gloria M Calaf, Ulises Urzúa, Enrique Boccardo, Julio C Tapia, Francisco Aguayo
The hallmark of high-risk human papillomavirus (HR-HPV)-related carcinogenesis is E6 and E7 oncogene overexpression. The aim of this work was to characterize epithelial oral and cervical cancer cells that express HR-HPV E6 and E7 oncoproteins. Transcriptomic assay using DNA microarrays revealed that PIR gene expression was detected in oral cells in an HR-HPV E6/E7-dependent manner. In addition, PIR was overexpressed in HPV-positive SiHa and Ca Ski cells, whereas it was undetectable in HPV-negative C33A cells...
November 2017: Open Biology
https://www.readbyqxmd.com/read/29117186/human-papillomavirus-type-16-e6-and-nfx1-123-mislocalize-immune-signaling-proteins-and-downregulate-immune-gene-expression-in-keratinocytes
#11
Justine Levan, Portia A Vliet-Gregg, Kristin L Robinson, Rachel A Katzenellenbogen
Human papillomavirus (HPV) is the most prevalent sexually transmitted infection, affecting an estimated 11% of the world's population. The high-risk HPV types (HR HPV) account for approximately 5% of the global burden of cancer and thus cause high morbidity and mortality. Although it is known that persistent infection with HR HPV is the greatest risk factor for developing HPV-associated cancer, and that the HPV early proteins E6 and E7 dysregulate immune detection by its host cells, the mechanisms of immune evasion by HR HPV are not well understood...
2017: PloS One
https://www.readbyqxmd.com/read/29113824/comparative-analysis-of-different-cell-systems-for-zika-virus-zikv-propagation-and-evaluation-of-anti-zikv-compounds-in-vitro
#12
Ilaria Vicenti, Adele Boccuto, Alessia Giannini, Filippo Dragoni, Francesco Saladini, Maurizio Zazzi
A strong correlation between Zika virus (ZIKV) infection and severe neurological disease in newborns and occasionally adults has emerged in the Brazilian outbreak. Efficient human cell-based assays are required to test candidate inhibitors of ZIKV replication. The aim of this work was to investigate ZIKV propagation and quantification in different cell lines. The human (U87, A549, Huh7), mosquito (C6/36) and monkey (VERO E6) cell lines tested were all permissive to ZIKV infection. When assessed by plaque forming units (PFU) in three different target cell lines, the maximal production of ZIKV was achieved in Huh7 at day 3 post-infection (6...
November 4, 2017: Virus Research
https://www.readbyqxmd.com/read/29113275/e6-e7-proteins-are-potential-markers-for-the-screening-and-diagnosis-of-cervical-pre-cancerous-lesions-and-cervical-cancer-in-a-chinese-population
#13
Wen-Jing Shi, Hao Liu, Dan Wu, Zhen-Hua Tang, Yu-Chen Shen, Lin Guo
The present prospective study aimed to evaluate the effects of E6/E7 protein detection by western blotting on cervical cancer (CC) early screening compared with detection by Hybrid Capture 2 (HC2) test and ThinPrep cytological test (TCT) in a Chinese population. A total of 450 cases of cervical intraepithelial neoplasia (CIN) suspected samples (positive in ≥1 indicator of TCT and HC2 test) were recruited from women who were treated at the International Peace Maternity and Child Health Hospital (Shanghai, China) from March 2014 to February 2015...
November 2017: Oncology Letters
https://www.readbyqxmd.com/read/29112014/hpv-e6-e7-mrna-in-situ-hybridization-in-the-diagnosis-of-cervical-low-grade-squamous-intraepithelial-lesions-lsil
#14
Anne M Mills, Joseph D Coppock, Brian C Willis, Mark H Stoler
Cervical low-grade squamous intraepithelial lesions (LSIL) (aka cervical intraepithelial neoplasia, grade 1 [CIN1]) can present considerable diagnostic challenges and are associated with poor interobserver reproducibility and overdiagnosis. Furthermore, ancillary studies such as p16 immunohistochemistry have shown little utility in resolving the LSIL versus negative/reactive differential. Human papillomavirus (HPV) RNA in situ hybridization (ISH) has shown promise as a diagnostic aid in this setting, but has not been studied in a large case series...
November 3, 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/29109932/international-council-for-harmonisation-e6-r2-addendum-challenges-of-implementation
#15
Arun Bhatt
The International Council for Harmonisation (ICH) E6 - good clinical practice (GCP) (R2) addendum - was released in 2016 to encourage implementation of improved approaches for the management of clinical trials. The changes in different sections include new approaches - quality management system, risk-based monitoring with emphasis on human subject protection, and data integrity. The article discusses challenges in adoption and implementation of the changes in ICH GCP guideline for clinical trial stakeholders...
October 2017: Perspectives in Clinical Research
https://www.readbyqxmd.com/read/29108834/photodynamic-therapy-of-human-biliary-cancer-cell-line-using-combination-of-phosphorus-porphyrins-and-light-emitting-diode
#16
Jin Matsumoto, Kou Suzuki, Masahide Yasuda, Yuya Yamaguchi, Yoshitaka Hishikawa, Naoya Imamura, Atsushi Nanashima
A series of phosphorus porphyrin complexes ([(RO)2P(tpp)]Cl, tpp = tetraphenylporphyrinato group, R = -(CH2CH2O)m(CH2)nH; 1a: m = 2, n = 2; 1b: m = 2, n = 4; 1c: m = 2, n = 6; 1d: m = 3, n = 6) were used for the photodynamic therapy (PDT) of human biliary cancer cell line (NOZ) when exposed to the irradiation of light emitting diodes (LEDs). A Dulbecco's modified Eagle's medium (DMEM) containing NOZ cells (2000 cell well(-1)) and 1 (0-100 nM) was introduced into a 96-well microplate and incubated for 24 h to accumulate 1 into the NOZ cells and to multiply the NOZ cells until the cell number reached 10(4) cells well(-1)...
October 21, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/29104658/bacterial-keratitis-photodynamic-inactivation-reduced-experimental-inflammation
#17
Mona Deichelbohrer, Ming-Feng Wu, Berthold Seitz, Dirk Hüttenberger, Matthias W Laschke, Hans-Jochen Foth, Bodo Wonnenberg, Stefan Wagenpfeil, Carola Meier, Markus Bischoff, Thomas Tschernig
The successful treatment of bacterial keratitis remains an unsolved clinical problem. The current study aimed to establish a murine keratitis model and to investigate the effect of chlorin e6 (Ce6) and photodynamic inactivation (PDI) on corneal inflammation. The cornea of anesthetized mice was scratched and covered with a bacterial suspension of Pseudomonas aeruginosa. A paste containing Ce6 was applied to the cornea with subsequent exposure to specified light. Two days later the animals were sacrificed, and the globes were processed for light microscopy...
November 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29101537/analysis-of-the-glycoproteins-of-seoul-orthohantavirus-strain-b1-associated-with-fusion-activity
#18
Yuji Isegawa, Yoshinobu Okuno
We analyzed two virus variants (S1 and L1) from Seoul orthohantavirus strain B1. Strain B1 produces large opaque plaques when plated on Vero E6 cell monolayers. However, although the L1 variant produced the large opaque plaques common to the strain, the variant S1 produced small clear ones on Vero E6 cells. Five days after Vero E6 cells were infected with the S1 variant, polykaryons formed spontaneously. However, the cells infected with the L1 variant did not show the formation of syncytia. An analysis of the pH dependency of the cell fusion demonstrated that the L1 variant could induce cell fusion, but only at a pH that was 0...
November 3, 2017: Archives of Virology
https://www.readbyqxmd.com/read/29100707/cell-attenuated-porcine-epidemic-diarrhea-virus-strain-zhejiang08-provides-effective-immune-protection-attributed-to-dendritic-cell-stimulation
#19
Yuchen Li, Guihua Wang, Jialu Wang, Kun Man, Qian Yang
Since 2010, the porcine epidemic diarrhea coronavirus (PEDV) has caused significant damage to the global pork industry. However, classical PEDV vaccine strains only provide limited protection against emerging strains. In this study, we successfully isolated and attenuated the PEDV epidemic strain Zhejiang08, which was characterized by good cell adaptation and high-titer production 48 h post infection in Vero E6 cells. The attenuated virus induced a high level of virus-specific neutralizing antibodies until 120 days after immunization in piglets and provided complete protection when challenged with an emerging virus strain on day 14 post immunization...
October 31, 2017: Vaccine
https://www.readbyqxmd.com/read/29100527/hpv11-e6-mutation-by-overexpression-of-apobec3a-and-effects-of-interferon-%C3%AF-on-apobec3s-and-hpv11-e6-expression-in-hpv11-hacat-cells
#20
Yongfang Wang, Xinyu Li, Shasha Song, Yang Sun, Jiafen Zhang, Changming Yu, Wei Chen
BACKGROUND: Condyloma acuminatum, infected by low-risk human papillomaviruses (e.g., HPV6 and HPV11), is one of the most widespread sexually transmitted diseases. Apolipoprotein B mRNA-editing enzyme catalytic polypeptide-like 3 proteins (APOBEC3s, A3s) are cellular cytidine deaminases acting as antiviral factors through hypermutation of viral genome. However, it remains unknown whether A3s results in HPV11 gene mutations and interferon-ω (IFN-ω) exhibits antiviral activities through the A3s system...
November 3, 2017: Virology Journal
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