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Vaccine adjuvant

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https://www.readbyqxmd.com/read/29138084/determination-immunogenic-property-of-truncated-mrph-flic-as-a-vaccine-candidate-against-urinary-tract-infections-caused-by-proteus-mirabilis
#1
Zakaria Bameri, Mohammad Reza Asadi Karam, Mehri Habibi, Parastoo Ehsani, Saeid Bouzari
Proteus mirabilis is common cause of urinary tract infections (UTIs) especially in complicated UTIs which are resistant to antibiotic therapy, Consequently, an ideal vaccine is inevitably required. The N-terminal domain of MrpH (Truncated form of MrpH) lies between the most critical antigens of P. mirabilis to consider as vaccine candidate. FliC of Salmonella typhimurium induces several pathways of immunity system, which leads to produce antibody and cytokines. In this study, adjuvant properties of FliC and efficacy of truncated MrpH as important antigen, in tMrpH...
November 11, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29137362/an-optimized-hmgb1-expressed-by-recombinant-rabies-virus-enhances-immunogenicity-through-activation-of-dendritic-cells-in-mice
#2
Zhao Wang, Qian Liang, Yajing Zhang, Jie Yang, Mingming Li, Kunlun Wang, Min Cui, Huanchun Chen, Zhen F Fu, Ling Zhao, Ming Zhou
Rabies remains an important public health threat, killing approximately 59,000 people worldwide annually, most of which are from the developing countries of Africa and Asia where dog rabies are endemic. Therefore, developing an affordable and efficacious vaccine for dog-mediated rabies control is needful in these countries. Our previous studies indicated that over-expression of granulocyte-macrophage colony stimulating factor (GM-CSF) or macrophage inflammatory protein-1 (MIP-1α or CCL3) by recombinant rabies virus (rRABV) could enhance the immunogenicity by activating dendritic cells (DCs)...
October 13, 2017: Oncotarget
https://www.readbyqxmd.com/read/29137294/immunoprevention-of-kras-driven-lung-adenocarcinoma-by-a-multipeptide-vaccine
#3
Jing Pan, Qi Zhang, Shizuko Sei, Robert H Shoemaker, Ronald A Lubet, Yian Wang, Ming You
Lung cancer remains the leading cause of cancer death worldwide. Mutations in KRAS are detected in up to 30% of lung cancer cases. No effective therapies specifically targeting mutant KRAS have been developed. Vaccination against KRAS mutants is one of the venues of active exploration. The present study evaluated both immunogenicity and antitumor efficacy of a newly formulated multipeptide vaccine targeting multiple epitopes of the KRAS molecule. The formulated vaccine contained top four peptides, which elicited the strongest immunologic response and showed 100% sequence homology between human and mouse...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29129452/long-term-humoral-immunity-induced-by-cvc1302-adjuvanted-serotype-o-foot-and-mouth-disease-inactivated-vaccine-correlates-with-promoted-t-follicular-helper-cells-and-thus-germinal-center-responses-in-mice
#4
Luping Du, Jin Chen, Liting Hou, Xiaoming Yu, Qisheng Zheng, Jibo Hou
Long-lasting humoral immunity is one of the necessary criteria for a successful vaccine. In our previous study, it was demonstrated that the immunopotentiator CVC1302 could improve the humoral immunity induced by the foot and mouth disease virus (FMDV) killed vaccine (KV) with only one dose. Significantly higher FMDV-specific antibody titers and more persistent antibody responses were observed in pigs receiving CVC1302-adjuvanted KV (KV-CVC1302) than in those inoculated with KV alone. In this study, we show that CVC1302 enhances murine IgG responses to FMDV by promoting a potent T follicular helper cell (TFH) response, which directly controls the magnitude of the germinal center (GC) B cell response...
November 9, 2017: Vaccine
https://www.readbyqxmd.com/read/29127039/biodegradable-sting-agonist-nanoparticles-for-enhanced-cancer-immunotherapy
#5
David R Wilson, Rupashree Sen, Joel C Sunshine, Drew M Pardoll, Jordan J Green, Young J Kim
Therapeutic cancer vaccines require adjuvants leading to robust type I interferon and proinflammatory cytokine responses in the tumor microenvironment to induce an anti-tumor response. Cyclic dinucleotides (CDNs), a potent Stimulator of Interferon Receptor (STING) agonist, are currently in phase I trials. However, their efficacy may be limited to micromolar concentrations due to the cytosolic residence of STING in the ER membrane. Here we utilized biodegradable, poly(beta-amino ester) (PBAE) nanoparticles to deliver CDNs to the cytosol leading to robust immune response at >100-fold lower extracellular CDN concentrations in vitro...
November 7, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/29126666/preparation-and-immunological-evaluation-of-inactivated-avian-influenza-virus-vaccine-encapsulated-in-chitosan-nanoparticles
#6
Samah H Mohamed, Abdel Satar Arafa, Wesam H Mady, Hanan A Fahmy, Lamiaa M Omer, Rania E Morsi
Efficacy maximization of inactivated avian influenza vaccine using safe adjuvants was investigated. Chitosan nanoparticles were prepared by ionic gelation method with average size of 150 nm and their Zeta potential was 11.5 mV. After encapsulation of avian influenza vaccine, the average size was 397 nm and Zeta potential was 4.29 mV. The highest HI antibody titer results were shown in chicken group vaccinated with inactivated avian influenza virus AIV-chitosan followed by the group vaccinated with inactivated AIV-chitosan nanoparticles then the group vaccinated with oil inactivated AIV vaccine, on using chicken antigen at 2 weeks post second vaccination...
November 8, 2017: Biologicals: Journal of the International Association of Biological Standardization
https://www.readbyqxmd.com/read/29126629/characterization-of-innate-responses-induced-by-in-ovo-administration-of-encapsulated-and-free-forms-of-ligands-of-toll-like-receptor-4-and-21-in-chicken-embryos
#7
Jegarubee Bavananthasivam, Tamiru N Alkie, Ayumi Matsuyama-Kato, Douglas C Hodgins, Shayan Sharif
Toll-like receptors (TLRs) are a family of innate receptors that recognize pathogen-associated molecular patterns, including double-stranded RNA, CpG DNA and lipopolysaccharide (LPS). After interaction with their ligands, TLRs initiate innate responses that are manifested by activating cells and inducing expression of cytokines that help mediate adaptive immune responses. TLR ligands (TLR-Ls) have the potential to be used prophylactically (alone) or as vaccine adjuvants to promote host immunity. Encapsulating TLR-Ls in nanoparticles, such as Poly (d,l-lactic-co-glycolic acid), may prolong responses through sustained release of the ligands...
October 25, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/29124321/vaccine-responses-in-newborns
#8
REVIEW
Anja Saso, Beate Kampmann
Immunisation of the newborn represents a key global strategy in overcoming morbidity and mortality due to infection in early life. Potential limitations, however, include poor immunogenicity, safety concerns and the development of tolerogenicity or hypo-responsiveness to either the same antigen and/or concomitant antigens administered at birth or in the subsequent months. Furthermore, the neonatal immunological milieu is polarised towards Th2-type immunity with dampening of Th1-type responses and impaired humoral immunity, resulting in qualitatively and quantitatively poorer antibody responses compared to older infants...
November 9, 2017: Seminars in Immunopathology
https://www.readbyqxmd.com/read/29122387/protection-against-schistosoma-haematobium-infection-in-hamsters-by-immunization-with-schistosoma-mansoni-gut-derived-cysteine-peptidases-smcb1-and-smcl3
#9
Hatem Tallima, Marwa Abou El Dahab, Sahira Kareem, John Pius Dalton, Rashika El Ridi
We examined the immunogenicity and protective potential of SmCB1 and SmCL3 cysteine peptidases, alone and in combination, in hamsters challenged with S. haematobium. For each of two independent experiments, eight Syrian hamsters were immunized twice with a three week-interval with 0 (controls), 20 µg SmCB1, 20 µg SmCL3, or 10 µg SmCB1 plus 10 µg SmCL3, and then percutaneously exposed eight weeks later to 100 S. haematobium cercariae. Hamsters from each group were assessed for humoral and whole blood culture cytokine responses on day 10 post challenge infection, and examined for parasitological parameters 12 weeks post infection...
November 6, 2017: Vaccine
https://www.readbyqxmd.com/read/29122386/towards-replacement-of-the-acellular-pertussis-vaccine-safety-test-comparison-of-in-vitro-cytotoxic-activity-and-in-vivo-activity-in-mice
#10
Leslie D Wagner, Laura J Corvette, Miriam M Ngundi, Drusilla L Burns
Because of the exquisite sensitivity of the murine histamine sensitization test (HIST) in detecting minute amounts of active pertussis toxin (PTx), this animal-based test has been used to assure the safety of acellular pertussis vaccines in the United States and other countries around the world. Prompted by humane considerations, efforts are underway to find a suitable in vitro replacement assay that has critical attributes comparable to that of the HIST. In this study, we compared the sensitivity of the in vivo HIST with an in vitro Chinese Hamster Ovary (CHO) cell-based assay...
November 6, 2017: Vaccine
https://www.readbyqxmd.com/read/29118363/influence-of-hydrocarbon-oil-structure-on-adjuvanticity-and-autoimmunity
#11
Anthony C Y Yau, Erik Lönnblom, Jianghong Zhong, Rikard Holmdahl
Mineral oils are extensively used in our daily life, in food, cosmetics, biomedicine, vaccines and in different industrial applications. However, exposure to these mineral oils has been associated with immune adjuvant effects and the development of autoimmune diseases. Here we investigate the structural impacts of the hydrocarbon oil molecules on their adjuvanticity and autoimmunity. First, we showed that hydrocarbon oil molecules with small atomic differences could result in experimental arthritis in DA rats differing in disease severity, incidence, weight change and serum levels of acute phase proteins...
November 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29115562/fungal-mannosylation-enhances-human-papillomavirus-16-e7-therapeutic-immunity-against-tc-1-tumors
#12
Zonglin Wang, Cuihua Wei, Yanjun Zhang, Wei Wang, Zheng Zhou, Gengfu Xiao
Cervical cancer, resulting from infection with human papillomavirus (HPV)16, remains the fourth most common cancer in women worldwide. Recently, three prophylactic HPV vaccines targeting high-risk HPVs (particularly HPV16 and HPV18) have been implemented to protect younger women. However, individuals with pre-existing infections have no benefit from prophylactic vaccines. Thus, there is an urgent need to develop therapeutic vaccines. HPV16 E7 has been widely utilized as a target for immune therapy of HPV16-associated lesions or cancers, reflecting the sustained existence of this virus in cancerous cells...
November 8, 2017: Oncology Reports
https://www.readbyqxmd.com/read/29114544/dendritic-cell-therapy-in-melanoma
#13
REVIEW
Carmen Alvarez-Dominguez, Ricardo Calderón-Gonzalez, Hector Terán-Navarro, David Salcines-Cuevas, Almudena Garcia-Castaño, Javier Freire, Javier Gomez-Roman, Fernando Rivera
Dendritic cell (DC) vaccines are cancer vaccines used currently as melanoma therapies. They act as adjuvants initiating the immune responses, but not only as they can also have effector activities redirecting cytotoxic CD8(+) T cells against melanoma. Ex vivo preparation of monocyte derived DCs has been implemented to produce large numbers of DCs for clinical therapy, highlighting the necessity of activate DC s to produce Th1 cytokines, especially TNF-a and IL-12 with potent anti-tumour actions. Several clinical trials both in the European Union and USA are open currently using DC vaccines, alone or in combination with other immunotherapies...
October 2017: Annals of Translational Medicine
https://www.readbyqxmd.com/read/29114542/new-trends-in-antitumor-vaccines-in-melanoma
#14
REVIEW
Marcos Vasquez, Shirley Tenesaca, Pedro Berraondo
Antitumor therapeutic vaccines aim at priming an effector immune response able to recognize and kill tumor cells. Antitumor vaccines are composed of at least two main components: the tumor antigens and the adjuvant. Metastatic advanced melanoma has been a model disease to test novel advances in vaccine design due to the intrinsic immunogenicity of this tumor and the accessibility to melanoma lesions to monitor the immune response. In spite of a large number of clinical trials, clinical benefit remains elusive...
October 2017: Annals of Translational Medicine
https://www.readbyqxmd.com/read/29112895/polyactin-a-is-a-novel-and-potent-immunological-adjuvant-for-peptide-based-cancer-vaccine
#15
Wei Wang, Yanqin Li, Yawen Wang, Shuting Ren, Yiping Li, Bing Wang
Synthetic peptide cancer vaccines are poorly immunogenic sub-unit vaccines and thus essentially need adjuvants in their formulations to increase the efficacy by enhancing the peptide-specific immune response. However, aluminum-based compounds are almost dependent for clinical use at present. Therefore, the increasing use of peptide-based vaccines makes the need for novel and potent adjuvants. Polyactin A (PAA) has been used for the clinical treatment of impaired immunity in China for over 30years. To figure out the adjuvant effects of PAA for E75 peptide breast cancer vaccine (Her2 p369-p377), the generation of mature dendritic cells (DCs) from peripheral blood monocytes (PBMCs) cultured with PAA, IL-4 and TNF-α was assessed by morphologic features and the expressions of special surface markers using flow cytometry...
November 4, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/29112822/synthesis-and-immunological-comparison-of-differently-linked-lipoarabinomannan-oligosaccharide-monophosphoryl-lipid-a-conjugates-as-anti-tuberculosis-vaccines
#16
Lizhen Wang, Shaojie Feng, Subo Wang, Hui Li, Zhongwu Guo, Guofeng Gu
A monophosphoryl lipid A (MPLA) derivative having the 6'-OH group substituted with an NH2 group was synthesized and coupled with the upstream terminal tetrasaccharide of mycobacterial lipoarabinomannan (LAM) via an amide bond to create a novel type of MPLA-based fully synthetic glycoconjugate vaccine. The same tetrasaccharide was also coupled with MPLA at the 1-O-position. Immunological activities of the two synthetic conjugates were evaluated in mice and compared. Both provoked robust overall and IgG antibody responses, but intraperitoneal injection elicited significantly stronger responses than subcutaneous injection...
November 7, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/29112686/interferon-regulatory-factor-1-priming-of-tumour-derived-exosomes-enhances-the-antitumour-immune-response
#17
Mu-Qing Yang, Qiang Du, Patrick R Varley, Julie Goswami, Zhihai Liang, Ronghua Wang, Hui Li, Donna B Stolz, David A Geller
BACKGROUND: Tumour-derived exosomes (TEXs) have a potential for application in cancer vaccines. Whether TEXs after induction by interferon regulatory factor 1 (IRF-1) are capable of enhancing the antitumour response remains to be determined. METHODS: Exosomes released by tumour cells infected with IRF-1-expressing adenovirus (IRF-1-Exo) or treated with interferon-γ (IFN-Exo) were isolated via ultracentrifugation. The IRF-1 target proteins IL-15Rα and MHC class I (MHC-I) were analysed by western blot...
November 7, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/29110942/adjuvant-therapy-for-locally-advanced-renal-cell-carcinoma-a-meta-analysis-and-systematic-review
#18
Yangyang Bai, Songchao Li, Zhankui Jia, Yinghui Ding, Chaohui Gu, Jinjian Yang
OBJECTIVES: Many adjuvant therapies have been widely used in an attempt to reduce the local recurrence or distant metastasis of locally advanced renal cell carcinoma (RCC) after surgical resection. However, the benefits of adjuvant therapy remain controversial. Thus, we performed this study to analyze the role and safety of adjuvant therapy in renal cancer setting. METHODS AND METHODS: We comprehensively searched PubMed, EMBASE, Web of Science, and the Cochrane Library for published randomized controlled trials comparing adjuvant therapy (chemotherapy, vaccine therapy, immune therapy, and targeted therapy) versus no active treatment after surgery among patients with locoregional RCC...
October 27, 2017: Urologic Oncology
https://www.readbyqxmd.com/read/29109725/early-events-of-the-reaction-elicited-by-csf-470-melanoma-vaccine-plus-adjuvants-an-in-vitro-analysis-of-immune-recruitment-and-cytokine-release
#19
María B Pampena, María M Barrio, Estefanía P Juliá, Paula A Blanco, Erika M von Euw, José Mordoh, Estrella Mariel Levy
In a previous work, we showed that CSF-470 vaccine plus bacillus Calmette-Guerin (BCG) and granulocyte macrophage colony-stimulating factor (GM-CSF) as adjuvants resulted in a significant benefit in the distant metastasis-free survival when comparing vaccinated vs. IFN-α2b-treated high-risk cutaneous melanoma patients in a Phase II study. Immune monitoring demonstrated an increase in anti-tumor innate and adaptive immunities of vaccinated patients, with a striking increase in IFN-γ secreting lymphocytes specific for melanoma antigens (Ags)...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29109353/intranasal-immunization-with-a-recombinant-outer-membrane-protein-h-based-haemorrhagic-septicemia-vaccine-in-dairy-calves
#20
Korkiat Muangthai, Pallop Tankaew, Thanya Varinrak, Ratchanee Uthi, Suvichai Rojanasthien, Takuo Sawada, Nattawooti Sthitmatee
Haemorrhagic septicemia (HS) is a contagious disease in cattle with high morbidity and mortality rates. HS vaccine in Thailand is an oil-adjuvant formulation, and is difficult to administer. The present study aimed to formulate and evaluate the protection in dairy calves conferred by immunization with an in-house intranasal HS vaccine. The intranasal vaccine was formulated in a total volume of 500 µl containing either 50 or 100 µg of the recombinant outer membrane protein H (rOmpH) of Pasteurella multocida strain M-1404 (serovar B:2), and 10 µg of Cytosine-phosphate-guanosine oligodeoxynucleotides (CpG-ODN) as a mucosal adjuvant...
November 6, 2017: Journal of Veterinary Medical Science
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