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https://www.readbyqxmd.com/read/29236788/aflatoxin-and-viral-hepatitis-exposures-in-guatemala-molecular-biomarkers-reveal-a-unique-profile-of-risk-factors-in-a-region-of-high-liver-cancer-incidence
#1
Joshua W Smith, Maria F Kroker-Lobos, Mariana Lazo, Alvaro Rivera-Andrade, Patricia A Egner, Heiner Wedemeyer, Olga Torres, Neal D Freedman, Katherine A McGlynn, Eliseo Guallar, John D Groopman, Manuel Ramirez-Zea
Liver cancer is an emerging global health issue, with rising incidence in both the United States and the economically developing world. Although Guatemala experiences the highest rates of this disease in the Western hemisphere and a unique 1:1 distribution in men and women, few studies have focused on this population. Thus, we determined the prevalence and correlates of aflatoxin B1 (AFB1) exposure and hepatitis virus infection in Guatemalan adults. Healthy men and women aged ≥40 years (n = 461), residing in five departments of Guatemala, were enrolled in a cross-sectional study from May-October of 2016...
2017: PloS One
https://www.readbyqxmd.com/read/29230817/ebv-encoded-mirnas-target-atm-mediated-response-in-nasopharyngeal-carcinoma
#2
Raymond W-M Lung, Pok-Man Hau, Ken H-O Yu, Kevin Y Yip, Joanna H-M Tong, W-P Chak, Anthony W-H Chan, Ka-Hei Lam, Angela K-F Lo, Edith K-Y Tin, Shuk-Ling Chau, Jesse C-S Pang, Johnny S-H Kwan, Pierre Busson, Lawrence S Young, Lee-Fah Yap, Sai-Wah Tsao, Ka-Fai To, Kwok-Wai Lo
Nasopharyngeal carcinoma (NPC) is a highly invasive epithelial malignancy that is prevalent in southern China and Southeast Asia. It is consistently associated with latent Epstein-Barr virus (EBV) infection. In NPC, miR-BARTs, the EBV-encoded miRNAs derived from BamH1-A rightward transcripts are abundantly expressed and contribute to cancer development by targeting various cellular and viral genes. In this study, we establish a comprehensive transcriptional profile of EBV-encoded miRNAs in a panel of NPC patient-derived xenografts and an EBV-positive NPC cell line by small RNA sequencing...
December 12, 2017: Journal of Pathology
https://www.readbyqxmd.com/read/29230203/ibalizumab-targeting-cd4-receptors-an-emerging-molecule-in-hiv-therapy
#3
REVIEW
Simona A Iacob, Diana G Iacob
The HIV infection is responsible for the most devastating global pandemic of the last century. More than 39 million people have died of HIV/AIDS since 1981. The development of the antiretroviral (ARV) treatment begins with the discovery of zidovudine a nucleoside reverse transcriptase inhibitor. This breakthrough was followed by other ARV drug classes and representatives. Presently, HIV treatment employs 27 ARV representatives belonging to five different classes. Despite the proven benefits of ARV treatment and its long-term control of the HIV infection, there is an increasing concern about the numerous adverse effects and resistance to current ARV drugs...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29228714/unique-expression-signatures-of-circular-rnas-in-response-to-dna-tumor-virus-sv40-infection
#4
Jiandong Shi, Ningzhu Hu, Jianfang Li, Zhaoping Zeng, Ling Mo, Jing Sun, Meini Wu, Yunzhang Hu
Circular RNAs (circRNAs), identified as a class of widely expressed endogenous regulatory RNAs, are involved in diverse physiological and pathological processes. However, their role in viral pathogenesis and cellular antiviral response remains unexplored. In this study, a potent DNA tumor virus, simian virus 40 (SV40), was used as a model to investigate the viral influences on cellular circRNA transcriptome. Using RNA-seq, 15,241 putative circRNAs were identified de novo from 5,057 parental genes in monkey kidney-derived Vero cells...
November 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29228684/atorvastatin-downregulates-co-inhibitory-receptor-expression-by-targeting-ras-activated-mtor-signalling
#5
Isobel Okoye, Afshin Namdar, Lai Xu, Nicole Crux, Shokrollah Elahi
Regulation of T cell function in the steady state is mediated by co-inhibitory receptors or immune checkpoints such as PD-1, CTLA-4, TIM-3 and LAG-3. Persistent antigen stimulation, during chronic viral infections and cancer, results in sustained expression of multiple co-inhibitory receptors and subsequently poor effector T cell function. Immune checkpoint blockade using monoclonal antibodies against PD-1, PDL-1 and CTLA-4 has been implemented as an immunotherapy strategy- resulting in restoration of T cell function and reduction of viral load or tumour growth...
November 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29228452/establishment-and-analysis-of-the-prediction-model-for-cervical-squamous-cell-carcinoma
#6
Y-H Zhou, W-F Fan, J Deng, H-L Xi
OBJECTIVE: This study aimed to construct a prediction model for cervical squamous cell carcinoma and evaluate its accuracy in diagnosing cervical squamous cell carcinoma. PATIENTS AND METHODS: Fifty patients with initially histopathologically confirmed cervical squamous cell carcinoma and 150 patients with initially histopathologically confirmed cervical intraepithelial neoplasia (CIN) were enrolled. The high-risk human papillomavirus (HR-HPV) infection, human telomerase mRNA component (hTERC) gene and cell-myc (c-myc) gene amplification, and minichromosome maintenance protein 5 (MCM5) protein expression were detected...
November 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29228057/n-acetylcysteine-nac-ameliorates-epstein-barr-virus-latent-membrane-protein-1-induced-chronic-inflammation
#7
Xiao Gao, Eirini-Maria Lampraki, Sarwah Al-Khalidi, Muhammad Asif Qureshi, Rhea Desai, Joanna Beatrice Wilson
Chronic inflammation results when the immune system responds to trauma, injury or infection and the response is not resolved. It can lead to tissue damage and dysfunction and in some cases predispose to cancer. Some viruses (including Epstein-Barr virus (EBV)) can induce inflammation, which may persist even after the infection has been controlled or cleared. The damage caused by inflammation, can itself act to perpetuate the inflammatory response. The latent membrane protein 1 (LMP1) of EBV is a pro-inflammatory factor and in the skin of transgenic mice causes a phenotype of hyperplasia with chronic inflammation of increasing severity, which can progress to pre-malignant and malignant lesions...
2017: PloS One
https://www.readbyqxmd.com/read/29226326/retreg1-fam134b-a-new-player-in-human-diseases-15-years-after-the-discovery-in-cancer
#8
REVIEW
Farhadul Islam, Vinod Gopalan, Alfred King-Yin Lam
FAM134B (family with sequence similarity 134, member B) / RETREG1 and its functional roles are relatively new in human diseases. This review aimed to summarize various functions of FAM134B since our first discovery of the gene in 2001. The protein encoded by FAM134B is a reticulophagy receptor that regulates turnover of the endoplasmic reticulum (ER) by selective phagocytosis. Absence or non-functional expression of FAM134B protein impairs ER-turnover and thereby is involved in the pathogenesis of some human diseases...
December 11, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29217175/reactivity-of-igm-antibodies-elicited-by-pegylated-liposomes-or-pegylated-lipoplexes-against-auto-and-foreign-antigens
#9
Hidenori Ando, Amr S Abu Lila, Munehira Kawanishi, Taro Shimizu, Keiichiro Okuhira, Yu Ishima, Tatsuhiro Ishida
Polyethylene glycol (PEG) is an attractive tool for the development of nanoparticle-based cancer therapy since it endows nanoparticles with extended-circulation properties. Nevertheless, recent reports have revealed that intravenous injection of either PEGylated liposomes (SLs) or PEGylated lipoplex (PLpx) could elicit an anti-PEG immunoglobulin (IgM) response in a T cell-independent (TI) manner that would substantially compromise the in vivo fate of PEGylated products upon repeated administration. In the same context, viral or bacterial infections trigger the production of polyreactive IgM that binds both self and foreign antigens...
December 4, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29211874/prevalence-incidence-and-clearance-of-anal-high-risk-human-papillomavirus-hpv-infection-among-hiv-infected-men-in-the-sun-study
#10
Pragna Patel, Tim Bush, Erna Milunka Kojic, Lois Conley, Elizabeth R Unger, Teresa M Darragh, Keith Henry, John Hammer, Gerome Escota, Joel M Palefsky, John T Brooks
Background: The natural history of anal HPV infection among HIV-infected men is unknown. Methods: We collected anal swabs for cytology, HPV detection, and genotyping at annual visits from 2004-2012. We examined baseline prevalence, incidence and clearance of anal HPV infection at 48 months, and associated factors among HIV-infected men. Results: We examined 403 men who have sex with men (MSM) and 96 men who have sex with women (MSW) (median age 42 years for both, 87 vs...
December 4, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29211501/viral-subversion-of-apobec3s-lessons-for-anti-tumor-immunity-and-tumor-immunotherapy
#11
Faezeh Borzooee, Mahdi Asgharpour, Emma Quinlan, Michael D Grant, Mani Larijani
APOBEC3s (A3) are endogenous DNA-editing enzymes that are expressed in immune cells including T lymphocytes. A3s target and mutate the genomes of retroviruses that infect immune tissues such as the human immunodeficiency virus (HIV). Therefore, A3s were classically defined as host anti-viral innate immune factors. In contrast, we and others showed that A3s can also benefit the virus by mediating escape from adaptive immune recognition and drugs. Crucially, whether A3-mediated mutations help or hinder HIV, is not up to chance...
December 6, 2017: International Reviews of Immunology
https://www.readbyqxmd.com/read/29208932/mouse-papillomavirus-infection-persists-in-mucosal-tissues-of-an-immunocompetent-mouse-strain-and-progresses-to-cancer
#12
Nancy M Cladel, Lynn R Budgeon, Karla K Balogh, Timothy K Cooper, Sarah A Brendle, Neil D Christensen, Todd D Schell, Jiafen Hu
Mouse papillomavirus has shown broad tissue tropism in nude mice. Previous studies have tested cutaneous infections in different immunocompromised and immunocompetent mouse strains. In the current study, we examined mucosal infection in several immunocompetent and immunocompromised mouse strains. Viral DNA was monitored periodically by Q-PCR of lavage samples. Immunohistochemistry and in situ hybridization were used to determine viral capsid protein and viral DNA respectively. All athymic nude mouse strains showed active infections at both cutaneous and mucosal sites...
December 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29204757/prevalence-of-comorbidities-and-evaluation-of-screening-in-chinese-patients-with-spondyloarthritis
#13
Yutong Jiang, Pingping Zhang, Liudan Tu, Qing Lv, Jun Qi, Zhiming Lin, Zetao Liao, Shuangyan Cao, Jieruo Gu
The aim of the study was to determine whether the presence of spondyloarthritis (SpA) is associated with particular comorbidities and evaluate the prevalence of comorbidities, risk factors, and monitoring status in China. Three hundred forty-six patients fulfilling ASAS criteria for SpA were recruited from the Third Affiliated Hospital of Sun Yat-sen University. The prevalence of comorbidities and percentage of patients optimally monitored for comorbidities were calculated. The most frequent comorbidities were osteoporosis (31...
December 4, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/29203712/heat-shock-protein-90-its-inhibition-and-function
#14
REVIEW
Abbey D Zuehlke, Michael A Moses, Len Neckers
The molecular chaperone heat shock protein 90 (Hsp90) facilitates metastable protein maturation, stabilization of aggregation-prone proteins, quality control of misfolded proteins and assists in keeping proteins in activation-competent conformations. Proteins that rely on Hsp90 for function are delivered to Hsp90 utilizing a co-chaperone-assisted cycle. Co-chaperones play a role in client transfer to Hsp90, Hsp90 ATPase regulation and stabilization of various Hsp90 conformational states. Many of the proteins chaperoned by Hsp90 (Hsp90 clients) are essential for the progression of various diseases, including cancer, Alzheimer's disease and other neurodegenerative diseases, as well as viral and bacterial infections...
January 19, 2018: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/29203175/impact-of-hpv-16-18-infection-on-clinical-outcomes-in-locally-advanced-cervical-cancers-treated-with-radical-radio-chemo-therapy-a-prospective-observational-study
#15
Umesh Mahantshetty, Tanuja Teni, Pushpa Naga, Chandni Hotwani, Sumuki Umesh, Sadhana Kannan, Vinod Hande, Sagar Pawar, Reena Engineer, Supriya Chopra, Kedar Deodhar, Amita Maheshwari, Lavanya Gurram, Sudeep Gupta, Shyam Kishore Shrivastava
OBJECTIVE: With an aim to investigate the impact of Human Papilloma Virus (HPV) 16/18 infection on clinical outcomes in locally advanced cervical cancers treated with radical radio (chemo) therapy, we undertook this prospective study. METHODS: Between May 2010 and April 2012, 150 histologically proven cervical cancer patients treated with radio (chemo) therapy were accrued. Cervical biopsies/brushings were collected at pre-treatment, end of treatment and at 3 monthly intervals up to 24months...
December 1, 2017: Gynecologic Oncology
https://www.readbyqxmd.com/read/29201867/inhibiting-dna-polymerases-as-a-therapeutic-intervention-against-cancer
#16
REVIEW
Anthony J Berdis
Inhibiting DNA synthesis is an important therapeutic strategy that is widely used to treat a number of hyperproliferative diseases including viral infections, autoimmune disorders, and cancer. This chapter describes two major categories of therapeutic agents used to inhibit DNA synthesis. The first category includes purine and pyrmidine nucleoside analogs that directly inhibit DNA polymerase activity. The second category includes DNA damaging agents including cisplatin and chlorambucil that modify the composition and structure of the nucleic acid substrate to indirectly inhibit DNA synthesis...
2017: Frontiers in Molecular Biosciences
https://www.readbyqxmd.com/read/29201776/viral-hepatitis-and-liver-diseases-in-mongolia
#17
REVIEW
Oidov Baatarkhuu, G Uugantsetseg, D Munkh-Orshikh, N Naranzul, S Badamjav, D Tserendagva, J Amarsanaa, Kim Do Young
Mongolia is known for its high endemicity for viral hepatitis. Previous studies report that the seroprevalence of hepatitis B virus (HBV) is 11.8% (178/1,512) among the unvaccinated population in 13 provinces and Ulaanbaatar city. The serosurvey of adults (>20 years of age) conducted during 2013 among persons in four provinces and in Ulaanbaatar showed that the overall prevalence of hepatitis B surface antigen (HBsAg) positivity was 10.6%. The overall prevalence of anti-hepatitis C virus (HCV) and HCV ribonucleic acid among 1,512 apparently healthy subjects was 15...
January 2017: Euroasian Journal of Hepato-Gastroenterology
https://www.readbyqxmd.com/read/29201774/hepatitis-action-plan-and-changing-trend-of-liver-disease-in-japan-viral-hepatitis-and-nonalcoholic-fatty-liver-disease
#18
REVIEW
Tatsuya Kanto, Sachiyo Yoshio
In Japan, the estimated number of chronic hepatitis B virus infections was 1.1 to 1.4 million, and that of chronic hepatitis C virus was 1.9 to 2.3 million in 2000. The mortality of hepatocellular carcinoma had been increasing and hit the peak at around 2002, which subsequently started to decrease. Japan has a national action plan for addressing viral hepatitis called Basic Act on Hepatitis Measures, established in 2009. In 2011, basic guidelines for promotion of control measures for hepatitis were issued, comprising nine principles in order to promote measures to prevent hepatitis B and C...
January 2017: Euroasian journal of hepato-gastroenterology
https://www.readbyqxmd.com/read/29200874/simultaneous-overexpression-of-mir-126-and-mir-34a-induces-a-superior-antitumor-efficacy-in-pancreatic-adenocarcinoma
#19
Shu-De Feng, Ziming Mao, Chunying Liu, Yu-Song Nie, Bin Sun, Minggao Guo, Changqing Su
Background: Pancreatic adenocarcinoma (PAC) is one of the most fatal cancers due to its high degree of malignancy, increasing incidence, high mortality, and unsatisfactory treatment efficacy. Evidence has suggested that numerous microRNAs (miRNAs), including miR-126 and miR-34a, have potent tumor-suppressing effects on PAC, implicating a possible application of miRNA in tumor therapy. However, the therapeutic effect of a single miRNA on pancreatic cancer is limited. Methods: We simultaneously delivered miR-126 and miR-34a into PAC cells by a carcinoembryonic antigen promoter-driven oncolytic adenovirus (AdCEAp-miR126/34a), and examined the antitumor efficacy of the therapeutic system in in vitro and in vivo experiments...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/29198314/t-cell-resistance-to-activation-by-dendritic-cells-requires-long-term-culture-in-simulated-microgravity
#20
Jillian H Bradley, Rachel Stein, Brad Randolph, Emily Molina, Jennifer P Arnold, Randal K Gregg
Immune impairment mediated by microgravity threatens the success of space exploration requiring long-duration spaceflight. The cells of most concern, T lymphocytes, coordinate the host response against microbial and cancerous challenges leading to elimination and long-term protection. T cells are activated upon recognition of specific microbial peptides bound on the surface of antigen presenting cells, such as dendritic cells (DC). Subsequently, this engagement results in T cell proliferation and differentiation into effector T cells driven by autocrine interleukin-2 (IL-2) and other cytokines...
November 2017: Life Sciences in Space Research
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