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Sandra Blome, Claudia Moß, Ilona Reimann, Patricia König, Martin Beer
Due to its impact on animal health and pig industry, classical swine fever (CSF) is still one of the most important viral diseases of pigs. To control the disease, safe and highly efficacious live attenuated vaccines exist for decades. These vaccines have usually outstanding efficacy and safety but lack differentiability of infected from vaccinated animals (DIVA or marker strategy). In contrast, the first generation of E2 subunit marker vaccines shows constraints in efficacy, application, and production. To overcome these limitations, new generations of marker vaccines are developed...
January 3, 2017: Veterinary Microbiology
Shui-Li Xia, Guang-Tao Xiang, Jian-Lin Lei, Mingliang Du, Yimin Wang, Mo Zhou, Yan Liu, Shengwei Ji, Ya-Lin Wang, Yuzi Luo, Yuan Sun, Hua-Ji Qiu
Classical swine fever (CSF) is an economically important disease caused by Classical swine fever virus (CSFV). In order to eradicate CSF, many marker vaccines that allow differentiation of infected from vaccinated animals (DIVA) have been developed. In our previous studies, a DIVA CSF vaccine rAdV-SFV-E2 has been demonstrated to completely protect pigs against lethal CSFV challenge. In the context of risk assessments for an emergency vaccination scenario, the question has been raised whether preexisting maternally derived antibodies (MDAs) interfere with the efficacy of the vaccine...
November 30, 2016: Veterinary Microbiology
Yinli Xie, Peng Gao, Zhiyong Li
Foot-and-mouth disease (FMD) is a highly contagious livestock disease of cloven-hoofed animals which causes severe economic losses. The replication-deficient, human adenovirus-vectored FMD vaccine has been proven effective against FMD. However, the role of T-cell-mediated antiviral responses and the mucosae-mediated antiviral responses induced by the adenovirus-vectored FMD vaccine was rarely examined. Here, the capsid protein precursor P1-2A and viral protease 3C of the type O FMDV were expressed in replicative-deficient human adenovirus type 5 vector...
2016: BioMed Research International
Thanh H Nguyen, Mónika Z Ballmann, Huyen T Do, Hai N Truong, Mária Benkő, Balázs Harrach, Mark J van Raaij
BACKGROUND: Most adenoviruses recognize their host cells via an interaction of their fibre head domains with a primary receptor. The structural framework of adenovirus fibre heads is conserved between the different adenovirus genera for which crystal structures have been determined (Mastadenovirus, Aviadenovirus, Atadenovirus and Siadenovirus), but genus-specific differences have also been observed. The only known siadenovirus fibre head structure, that of turkey adenovirus 3 (TAdV-3), revealed a twisted beta-sandwich resembling the reovirus fibre head architecture more than that of other adenovirus fibre heads, plus a unique beta-hairpin embracing a neighbouring monomer...
2016: Virology Journal
Shui-Li Xia, Jian-Lin Lei, Mingliang Du, Yimin Wang, Xin Cong, Guang-Tao Xiang, Lian-Feng Li, Shenye Yu, Enqi Du, Siguo Liu, Yuan Sun, Hua-Ji Qiu
Classical swine fever (CSF) is a highly contagious swine disease caused by classical swine fever virus (CSFV). Previously, we demonstrated that rAdV-SFV-E2, an adenovirus-delivered, Semliki Forest virus replicon-vectored marker vaccine against CSF, is able to protect pigs against lethal CSFV challenge. From an economical point of view, it will be beneficial to reduce the minimum effective dose of the vaccine. This study was designed to test the adjuvant effects of Salmonella enteritidis-derived bacterial ghosts (BG) to enhance the protective immunity of rAdV-SFV-E2 in pigs...
2016: Veterinary Research
Shui-Li Xia, Mingliang Du, Jian-Lin Lei, Yan Liu, Yimin Wang, Shengwei Ji, Guang-Tao Xiang, Lian-Feng Li, Xin Cong, Yuzi Luo, Lina Shao, Hua-Ji Qiu, Yuan Sun
Classical swine fever (CSF) is an economically important infectious disease of pigs caused by Classical swine fever virus (CSFV). To facilitate the eradication of CSF in endemic areas, a marker vaccine enabling differentiation of infected from vaccinated animals (DIVA) is urgently needed. Previously, we have demonstrated that the DIVA vaccine rAdV-SFV-E2, an adenovirus-vectored Semliki Forest virus replicon expressing the E2 glycoprotein of CSFV, induces complete protection from lethal CSFV challenge. The aim of this study was to investigate whether maternally derived antibodies (MDAs) from sows immunized with rAdV-SFV-E2 can effectively protect piglets against lethal CSFV challenge...
July 15, 2016: Veterinary Microbiology
Xiuhong Liu, Shuang Wang, Xianghua Guo, Feili Wei, Jiming Yin, Yunjin Zang, Ning Li, Dexi Chen
Suicide gene therapy using herpes simplex virus-1 thymidine kinase (HSV-TK) in combination with ganciclovir (GCV) has emerged as a potential new method for treating cancer. We hypothesize that the efficacy of HSV-TK/GCV therapy is at least partially dependent on p53 status in hepatocellular carcinoma (HCC) patients. Using recombinant adenoviral vectors (rAdV), TK, p53, and ASPP2 were overexpressed individually and in combination in Hep3B (p53 null) and HepG2 (p53 wild-type) cell lines and in primary HCC tumor cells...
April 5, 2016: Oncotarget
Helin Li, Rui Gao, Yanming Zhang
Classical swine fever (CSF) vaccine based on HAdV-5 had achieved an efficient protection in swine. Both classical swine fever virus (CSFV) E0 glycoprotein and E2 glycoprotein were the targets for neutralizing antibodies and related to immune protection against CSF. Interleukin-2 (IL2), as an adjuvant, also had been used in CSF vaccine research. In this study, coexpression of the CSFV E0, E2, and IL2 genes by HAdV-5 (rAdV-E0-E2-IL2) was constructed and immunized to evaluate its efficacy. Three expressed genes had been sequentially connected with foot-and-mouth disease virus 2A (FMDV 2A)...
May 2016: Viral Immunology
Yuzi Luo, Lin Li, Sophia Austermann-Busch, Mei Dong, Jingjing Xu, Lina Shao, Jianlin Lei, Na Li, Wen-Rui He, Bibo Zhao, Su Li, Yongfeng Li, Lihong Liu, Paul Becher, Yuan Sun, Hua-Ji Qiu
Classical swine fever (CSF), caused by classical swine fever virus (CSFV), is a devastating disease of swine worldwide. Although a mandatory vaccination with the modified live vaccine C-strain has been implemented in China for decades, CSF remains a serious threat to the swine industry. To facilitate the control and eradication of CSF in China, the E2-based marker vaccine rAdV-SFV-E2, an adenovirus-delivered, alphavirus replicon-vectored vaccine, has been developed. Accordingly, an accompanying discriminatory test that allows differentiating infected from vaccinated animals (DIVA) is required...
September 15, 2015: Journal of Virological Methods
Mariana A Nascimento, Maria E Magri, Camila D Schissi, Célia Rm Barardi
BACKGROUND: In Brazil, ordinance no. 2,914/2011 of the Ministry of Health requires the absence of total coliforms and Escherichia coli (E. coli) in treated water. However it is essential that water treatment is effective against all pathogens. Disinfection in Water Treatment Plants (WTP) is commonly performed with chlorine. METHODS: The recombinant adenovirus (rAdV), which expresses green fluorescent protein (GFP) when cultivated in HEK 293A cells, was chosen as a model to evaluate the efficiency of chlorine for human adenovirus (HAdV) inactivation in filtered water samples from two WTPs: Lagoa do Peri (pH 6...
2015: Virology Journal
Yan Chen, Jin Zhang, Yong Lu, Libo Wang
Bronchial asthma is a chronic airway inflammatory condition with high morbidity, and effective treatments for asthma are limited. Allergen-specific immunotherapy can only induce peripheral immune tolerance and is not sustainable. Exploring new therapeutic strategies is of great clinical importance. Recombinant adenovirus (rAdV) was used as a vector to make cells expressing cytotoxic T lymphocyte-associated antigen-4-immunoglobulin (CTLA4Ig) a soluble CTLA4 immunoglobulin fusion protein. Dendritic cells (DCs) were modified using the rAdVs together with allergens...
2015: PloS One
Elodie Roques, Martin Lessard, Denis Archambault
The porcine reproductive and respiratory syndrome virus (PRRSV) is an arterivirus of the Arteriviridae family. As the current commercial vaccines are incompletely protective effective against PRRSV infection, we developed a vaccine strategy using replicating but non-disseminating adenovectors (rAdVs) expressing the PRRSV M matrix protein in fusion with the neutralizing major epitope-carrying GP5 envelope protein (Roques et al. in Vet Res 44:17, 2013). Although production of GP5-specific antibodies (Abs) was observed, no PRRSV-specific neutralizing Abs (NAbs) were induced in pigs given the rAdVs expressing M-GP5 or M-GP5m (GP5m being a mutant form of GP5)...
August 2015: Molecular Biotechnology
Yang Dai, Xiaoting Wang, Jianxia Tang, Song Zhao, Yuntian Xing, Jianrong Dai, Xiaolin Jin, Yinchang Zhu
BACKGROUND: Schistosomiasis japonica is a zoonotic parasitic disease; developing transmission blocking veterinary vaccines are urgently needed for the prevention and control of schistosomiasis in China. Heterologous prime-boost strategy, a novel vaccination approach, is more effective in enhancing vaccine efficacy against multiple pathogens. In the present study, we established a novel heterologous prime-boost vaccination strategy, the rAdV-SjTPI.opt intramuscular priming and rSjTPI subcutaneous boosting strategy, and evaluated its protective efficacy against Schistosoma japonicum in mice...
2015: PloS One
Helin Li, Pengbo Ning, Zhi Lin, Wulong Liang, Kai Kang, Lei He, Yanming Zhang
The use of adenovirus vector-based vaccines is a promising approach for generating antigen-specific immune responses. Improving vaccine potency is necessary in other approaches to address their inadequate protection for the majority of infectious diseases. This study is the first to reconstruct a recombinant replication-defective human adenovirus co-expressing E2 and invasin C-terminal (InvC) glycoproteins (rAd-E2-InvC). rAd-E2-InvC with 2 x 10(6) TCID50 was intramuscularly administered two times to CSFV-free pigs at 14 day intervals...
March 2015: Journal of Biosciences
Lucas A T Garcia, Mariana A Nascimento, Célia R M Barardi
Shellfish depuration is a process that aims to eliminate pathogens from mollusk tissues. Seawater disinfection during the depuration process is important and ultraviolet (UV) light treatment is the most used method worldwide. Viral models are usually employed as surrogates of fastidious viruses in viability studies. The aim of this study was to employ methods based on green fluorescent protein (GFP) fluorescence and plaque forming units to detect, respectively, recombinant adenovirus (rAdV-GFP) and murine norovirus (MNV) artificially seeded in environmental matrices...
March 2015: Food and Environmental Virology
Yan Chen, Yongming Wang, Zhou Fu
The CD80/CD86-CD28 axis is a critical pathway for immuno-corrective therapy, and the cytotoxic T lymphocyte antigen 4 (CTLA4) is a promising immunosuppressor targeting the CD80/CD86-CD28 axis; however, its use for asthma therapy needs further optimization. A human CTLA4 fused with the IgCγ Fc (CTLA4Ig) and mouse CC chemokine receptor type7 (CCR7) coding sequences were inserted into a recombinant adenovirus (rAdV) vector to generate rAdV-CTLA4Ig and rAdV-CCR7. The naive dendritic cells (DCs) were infected with these rAdVs to ensure CCR7 and CTLA4Ig expression...
2014: International Journal of Molecular Sciences
Sook-Young Lee, Jeong-Hoon Kim, Yon Mi Park, Ok Sarah Shin, Hankyeom Kim, Han-Gu Choi, Jin-Won Song
Adenoviruses (family Adenoviridae) infect various organ systems and cause diseases in a wide range of host species. In this study, we examined multiple tissues from Chinstrap penguins (Pygoscelis antarctica), collected in Antarctica during 2009 and 2010, for the presence of novel adenoviruses by PCR. Analysis of a 855-bp region of the hexon gene of a newly identified adenovirus, designated Chinstrap penguin adenovirus 1 (CSPAdV-1), showed nucleotide (amino acid) sequence identity of 71.8% (65.5%) with South Polar skua 1 (SPSAdV-1), 71% (70%) with raptor adenovirus 1 (RAdV-1), 71...
May 2014: Viruses
Yang Dai, Xiaoting Wang, Song Zhao, Jianxia Tang, Lu Zhang, Jianrong Dai, Mingtao Zeng, Shan Lu, Yinchang Zhu, Chuan Su
Schistosomiasis is an endemic, zoonotic parasitic disease that remains a public health concern in China. Development of transmission blocking veterinary vaccines against Schistosoma japonicum infection is urgently needed. Replication-defective adenoviral vector is an efficient vaccine delivery system that has been widely used. Its use is associated with high levels of gene insertion and expression. It is easy to construct and prepare, and is safe. It is not known whether this delivery system can improve the protective effect of schistosome vaccination...
February 7, 2014: Vaccine
Lei He, Han-Xian Gong, Xiang-Pen Li, Yi-Dong Wang, Yi Li, Jun-Jian Huang, Dan Xie, Hsiang-Fu Kung, Ying Peng
A 27-kDa C-terminal fragment of human telomerase reverse transcriptase, hTERTC27, has previously been reported to inhibit the growth and tumorigenicity of HeLa human cervical cancer cells and U87-MG human glioblastoma multiforme cells. However, the antitumor effects of hTERTC27 in hepatoma and its underlying mechanisms are unclear. In the current study, the therapeutic effect of hTERTC27, mediated by recombinant adenovirus, in hepatocellular carcinoma (HCC) was explored in vitro and in vivo to investigate the possible mechanisms...
September 2013: Oncology Letters
Hong Yao, Shih-Chi Chen, Zan Shen, Yun-Chao Huang, Xiao Zhu, Xiao-Mei Wang, Wenqi Jiang, Zi-Feng Wang, Xiu-Wu Bian, Eng-Ang Ling, Hsiang-Fu Kung, Marie C Lin
The recombinant adenovirus is evolving as a promising gene delivery vector for gene therapy due to its efficiency in transducing different genes into most types of cells. However, the host-immune response elicited by primary inoculation of an adenovirus can cause rapid clearance of the vector, impairing the efficacy of the adenovirus and hence obstructing its clinical application. We have previously synthesized a biodegradable co-polymer consisting of a low molecular weight PEI (MW 600 Da), cross-linked with β-cyclodextrin, and conjugated with folic acid (PEI-CyD-FA, named H1)...
July 1, 2013: Current Medicinal Chemistry
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