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Clinical and Vaccine Immunology: CVI

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https://www.readbyqxmd.com/read/28331079/characterization-and-vaccine-potential-of-membrane-vesicles-produced-by-francisella-noatunensis-sup-orientalis-in-an-adult-zebrafish-model
#1
Leidy Lagos, Julia I Tandberg, Urska Repnik, Preben Boysen, Erik Ropstad, Deepa Varkey, Ian T Paulsen, Hanne C Winther-Larsen
Vaccine development against extracellular bacteria has been important for the sustainability of the aquaculture industry. In contrast, infections with intracellular pathogens remain largely an unresolved problem. Francisella noatunensis subspecies orientalis (Fno) are Gram-negative, facultative intracellular bacteria that cause the disease francisellosis in fish. Francisellosis is commonly characterized as a chronic granulomatous disease with high morbidity and can result in high mortality depending on the host...
March 22, 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28331078/tuberculin-skin-testing-boosts-interferon-gamma-responses-to-diva-reagents-in-mycobacterium-bovis-infected-cattle
#2
Gareth J Jones, Mick Coad, Bhagwati Khatri, Javier Bezos, Natalie A Parlane, Bryce M Buddle, Bernardo Villarreal-Ramos, R Glyn Hewinson, H Martin Vordermeier
BCG vaccination sensitises cattle to bovine tuberculin which compromises the use of the current bovine TB surveillance tests. Although the performance of a blood test (that utilises antigens expressed by Mycobacterium bovis but not by BCG) capable of discriminating infected from vaccinated animals (DIVA interferon-gamma test, DIT) has been evaluated in naturally infected TB field reactors, there is a need to perform similar analysis in a BCG vaccinated/M. bovis infected population. Furthermore, we explored different scenarios under which a DIT may be implemented alongside BCG vaccination: (i) serial testing to resolve potential false positive skin test results; or (ii) standalone test to replace the single intradermal comparative cervical tuberculin skin test (SICCT)...
March 22, 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28331077/novel-mechanisms-revealed-in-the-trachea-transcriptome-of-resistant-and-susceptible-chicken-lines-following-infection-with-newcastle-disease-virus
#3
Melissa S Deist, Rodrigo A Gallardo, David A Bunn, Terra R Kelly, Jack C M Dekkers, Huaijun Zhou, Susan J Lamont
Newcastle disease virus (NDV) has a devastating impact on poultry production in developing countries. This study examined the transcriptome of tracheal epithelial cells from two inbred chicken lines that differ in NDV susceptibility after challenge with a high-titer inoculum of lentogenic NDV. The Fayoumi line had a significantly lower NDV load post-challenge relative to the Leghorn line, demonstrating the Fayoumi's classification as a relatively NDV resistant breed. Examining the trachea transcriptome showed a large increase in immune cell infiltration in the trachea in both lines at all times post-infection...
March 22, 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28298291/plasmablast-response-to-primary-rhesus-cytomegalovirus-infection-in-a-monkey-model-of-congenital-cmv-transmission
#4
Qihua Fan, Cody S Nelson, Kristy M Bialas, Flavia Chiuppesi, Joshua Amos, Thaddeus C Gurley, Dawn Jones Marshall, Joshua Eudailey, Holly Heimsath, Jonathon Himes, Ashlesha Deshpande, Mark R Walter, Felix Wussow, Don J Diamond, Peter A Barry, M Anthony Moody, Amitinder Kaur, Sallie R Permar
Human cytomegalovirus (HCMV) is the most common congenital infection worldwide, and the leading infectious cause of neurologic deficits and hearing loss in newborns. Development of a maternal HCMV vaccine to prevent vertical virus transmission is a high priority, yet protective maternal immune responses following acute infection are poorly understood. To characterize the maternal humoral immune response to primary CMV infection, we investigated the plasmablast and early antibody repertoire using a nonhuman primate model with two acutely rhesus CMV (RhCMV) infected animals - a CD4+ T cell-depleted dam that experienced fetal loss shortly after vertical RhCMV transmission and an immunocompetent dam that did not transmit RhCMV to her infant...
March 15, 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28298290/a-prime-boost-pfcs14k-m-mva-spfcs-m-vaccination-protocol-generates-robust-cd8-t-cell-and-antibody-responses-to-plasmodium-falciparum-circumsporozoite-protein-and-protects-mice-against-malaria
#5
Aneesh Vijayan, Ernesto Mejías-Pérez, Diego A Espinosa, Suresh C Raman, Carlos Oscar S Sorzano, Fidel Zavala, Mariano Esteban
Vaccines against the pre-erythrocytic stages of malaria are appealing, since the parasite can be eliminated before disease onset and since they offer the unique possibility of targeting the parasite with both antibodies and T cells. Although the role CD8(+) T cells in pre-erythrocytic malaria stages is well documented, a highly effective T cell-inducing vaccine remains to be advanced. Here we report the development of a prime-boost immunization regimen with the Plasmodium falciparum circumsporozoite protein (PfCS) fused to the oligomer-forming vaccinia virus A27 protein and a modified vaccinia virus Ankara (MVA) vector expressing PfCS...
March 15, 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28274937/mass-spectrometry-approaches-for-identification-and-quantitation-of-therapeutic-monoclonal-antibodies-in-the-clinical-laboratory
#6
Paula M Ladwig, David R Barnidge, Maria A V Willrich
Therapeutic monoclonal antibodies (mAbs) are an important class of drugs used to treat diseases ranging from autoimmune disorders to B cell lymphomas to other rare conditions thought to be untreatable in the past. Many advances have been made in the characterization of immunoglobulins as a result of pharmaceutical companies investing in technologies that allow them to better understand mAbs during the development phase. Mass spectrometry is one of the new advancements utilized extensively by pharma to analyze mAbs, and is now beginning to be applied in the clinical laboratory setting...
March 8, 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28249842/tb-lymphadenitis-is-associated-with-enhanced-baseline-and-antigen-specific-induction-of-type-1-and-type-17-cytokines-and-reduced-il-1%C3%AE-and-il-18-at-the-site-of-infection
#7
Gokul Raj Kathamuthu, Kadar Moideen, Dhanaraj Baskaran, Vaithilingam V Banurekha, Dina Nair, Gomathi Sekar, Rathinam Sridhar, Bharathi Vidyajayanthi, Ganeshan Gajendraraj, Dinesh Kumar Parandhaman, Alena Srinivasan, Subash Babu
Tuberculous lymphadenitis (TBL) is characterized by an expansion of Th1 and Th17 cells with altered serum levels of pro-inflammatory cytokines. However, the cytokine profile at the site of infection i.e. the affected lymph nodes, has not been examined in detail. To estimate the baseline and mycobacterial antigen - stimulated cytokine concentrations of Type 1, Type 17 and other pro-inflammatory cytokines in TBL, we examined both the baseline and the antigen - specific concentrations of these cytokines in TBL (n = 14) before and after chemotherapy and compared them with pulmonary tuberculosis infection (PTB, n = 14)...
March 1, 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28249841/b-cell-responses-to-intramuscular-administration-of-a-bivalent-virus-like-particle-human-norovirus-vaccine
#8
Sasirekha Ramani, Frederick H Neill, Jennifer Ferreira, John J Treanor, Sharon E Frey, David J Topham, Robert R Goodwin, Astrid Borkowski, Frank Baehner, Paul M Mendelman, Mary K Estes, Robert L Atmar
Human noroviruses (HuNoVs) are a leading cause of acute gastroenteritis worldwide. A virus-like particle (VLP) candidate vaccine induces the production of serum histo-blood group antigen (HBGA) blocking antibodies, the first identified correlate of protection from HuNoV gastroenteritis. Recently, virus-specific IgG memory B-cells were identified as another potential correlate of protection against HuNoV gastroenteritis. We assessed B-cell responses following intramuscular administration of a bivalent (GI.1/GII...
March 1, 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28228395/antibody-responses-to-zika-virus-infections-in-flavivirus-endemic-environments
#9
Sarah L Keasey, Christine L Pugh, Stig M R Jensen, Jessica L Smith, Robert D Hontz, Anna P Durbin, Dawn M Dudley, David H O'Connor, Robert G Ulrich
Zika virus (ZIKV) infections occur in areas where dengue (DENV), West Nile (WNV), yellow fever (YFV), and other viruses of the genus Flavivirus co-circulate. The envelope protein (E) of these closely related flaviviruses induces specific long-term immunity, yet subsequent infections are associated with cross-reactive antibody responses that may enhance disease susceptibility and severity. To gain a better understanding of ZIKV infections against a background of similar viral diseases, we examined serological immune responses to ZIKV, WNV, DENV and YFV infections of humans and non-human primates (NHP)...
February 22, 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28228394/update-in-chlamydia-trachomatis-vaccinology
#10
Luis M de la Maza, Guangming Zhong, Robert C Brunham
Attempts to produce a vaccine to protect against Chlamydia trachomatis (C. trachomatis) induced trachoma were initiated more than 100 years ago and continued for several decades. Using whole organisms protective responses were obtained. However, upon exposure to C. trachomatis, disease exacerbation developed in some immunized individuals precluding the implementation of the vaccine. Evidence of the role of C. trachomatis as a sexually transmitted pathogen started to emerge in the 1960's and soon became evident that it can cause acute infections and long term-sequelae in women, men and newborns...
February 22, 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28179404/a-plasmodium-vivax-plasmid-dna-and-adenovirus-vectored-malaria-vaccine-encoding-blood-stage-antigens-ama1-and-msp142-in-a-prime-boost-heterologous-immunization-regimen-partially-protects-aotus-monkeys-against-blood-stage-challenge
#11
Nicanor Obaldia, Michael G Stockelman, William Otero, Jennifer A Cockrill, Harini Ganeshan, Esteban N Abot, Jianfeng Zhang, Keith Limbach, Yupin Charoenvit, Denise L Doolan, De-Chu C Tang, Thomas L Richie
Malaria is caused by parasites of the genus Plasmodium that are transmitted to humans by the bites of Anopheles mosquitoes. After the elimination of P. falciparum it is predicted that Plasmodium vivax will remain an important cause of morbidity and mortality outside of Africa, stressing the importance of developing a vaccine against malaria. In this study we assess the immunogenicity and protective efficacy of two P. vivax antigens, AMA1 and MSP142 in a recombinant DNA plasmid prime/adenoviral vector (Ad) boost regimen in Aotus monkeys...
February 8, 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28179403/evaluation-of-pvceltos-as-a-pre-erythrocytic-p-vivax-vaccine
#12
Eduardo Alves, Ahmed M Salman, Fabiana Leoratti, Cesar Lopez-Camacho, Martha Eva Viveros-Sandoval, Amar Lall, Aadil El-Turabi, Martin F Bachmann, Adrian V S Hill, Chris J Janse, Shahid M Khan, Arturo Reyes-Sandoval
Four different vaccine platforms each targeting the human malaria parasite Plasmodium vivax cell-traversal protein for ookinetes and sporozoites (PvCelTOS) were generated and assessed for protective efficacy. These platforms consisted of a recombinant chimpanzee adenoviral vector ChAd63-PvCelTOS (Ad); a recombinant MVA-PvCelTOS (MVA); a bacteriophage Qβ-PvCelTOS virus-like particle (VLP); and recombinant PvCelTOS protein expressed in eukaryotic HEK293T cells (protein). Inbred BALB/c and outbred CD-1 mice were immunized using the following prime/boost regimens: Ad-MVA, Ad-VLP and Ad-protein...
February 8, 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28151410/australian-aboriginal-children-with-otitis-media-have-reduced-antibody-titres-to-specific-nontypeable-haemophilus-influenzae-vaccine-antigens
#13
Ruth B Thornton, Lea-Ann S Kirkham, Karli J Corscadden, Selma P Wiertsema, Angela Fuery, B Jan Jones, Harvey L Coates, Shyan Vijayasekaran, Guicheng Zhang, Anthony Keil, Peter C Richmond
Indigenous populations experience high rates of otitis media (OM), with increased chronicity and severity compared to that experienced by their non-Indigenous counterparts. Data are lacking on immune responses to otopathogenic bacteria in these high-risk populations. Non-typeable Haemophilus influenzae (NTHi) is the predominant otopathogen in Australia. Currently no vaccines are licensed to target NTHi, however Protein D (PD) from NTHi is included as a carrier protein in the 10-valent pneumococcal conjugate vaccine PHiD10-CV, and other promising protein vaccine candidates exist, including outer membrane proteins P4 and P6...
February 1, 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28122790/cytokine-profiles-in-malawian-children-presenting-with-uncomplicated-malaria-severe-malarial-anemia-and-cerebral-malaria
#14
Wilson L Mandala, Chisomo L Msefula, Esther N Gondwe, Mark T Drayson, Malcolm E Molyneux, Calman A MacLennan
Pro-inflammatory cytokines are involved in clearance of Plasmodium falciparum, and very high levels of these cytokines have been implicated in the pathogenesis of severe malaria. In order to determine how cytokines vary with disease severity and syndrome, we enrolled Malawian children presenting with cerebral malaria (CM), severe malarial anaemia (SMA) and uncomplicated malaria (UCM), and healthy controls. We analysed serum cytokine concentrations in acute infection, and in convalescence. With the exception of IL-5, cytokine concentrations were highest in acute CM, followed by SMA, and were only mildly elevated in UCM...
January 25, 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28100498/the-predominant-cd4-th1-cytokine-elicited-to-chlamydia-trachomatis-infection-in-women-is-tumor-necrosis-factor-alpha-not-interferon-gamma
#15
Stephen J Jordan, Kanupriya Gupta, Brian M O Ogendi, Rakesh K Bakshi, Richa Kapil, Christen G Press, Steffanie Sabbaj, Jeannette Y Lee, William M Geisler
Chlamydia trachomatis infection is the most prevalent bacterial sexually transmitted infection and can cause significant reproductive morbidity in women. There is insufficient knowledge of C. trachomatis-specific immune responses in humans, which could be important in guiding vaccine development efforts. In contrast, murine models have clearly demonstrated the essential role of Type 1 T helper cells (Th1), especially interferon-gamma (IFN-γ) producing CD4(+) T-cells, in protective immunity to chlamydia. To determine the frequency and magnitude of Th1 cytokine responses elicited to C...
January 18, 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28100497/avian-and-human-seasonal-influenza-hemagglutinin-proteins-elicit-cd4-t-cell-responses-that-are-comparable-in-epitope-abundance-and-diversity
#16
Anthony DiPiazza, Katherine Richards, Nicholas Poulton, Andrea J Sant
Avian influenza viruses remain a significant concern due to their pandemic potential. Vaccine trials have suggested that humans respond poorly to avian influenza vaccines relative to seasonal vaccines. It is important to understand, first, if there is a general deficiency in the ability of avian hemagglutinin (HA) proteins to generate immune responses and, if so, what underlies this defect. This question is of particular interest because it has been suggested that in humans, the poor immunogenicity of H7 vaccines may be due to a paucity of CD4 T cell epitopes...
March 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28100496/preexisting-immunity-not-frailty-phenotype-predicts-influenza-postvaccination-titers-among-older-veterans
#17
Puja Van Epps, Terrence Tumpey, Melissa B Pearce, Hana Golding, Patricia Higgins, Thomas Hornick, Christopher Burant, Brigid M Wilson, Richard Banks, Stefan Gravenstein, David H Canaday
Both preexisting immunity to influenza and age have been shown to be correlates of influenza vaccine responses. Frailty, an indicator of functional impairment in older adults, was also shown in one study to predict lower influenza vaccine responses among nonveterans. In the current study, we aimed to determine the associations between frailty, preexisting immunity, and immune responses to influenza vaccine among older veterans. We studied 117 subjects (age range, 62 to 95 years [median age, 81 years]), divided into three cohorts based on the Fried frailty test, i...
March 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28077441/using-data-from-macaques-to-predict-gamma-interferon-responses-after-mycobacterium-bovis-bcg-vaccination-in-humans-a-proof-of-concept-study-of-immunostimulation-immunodynamic-modeling-methods
#18
Sophie J Rhodes, Charlotte Sarfas, Gwenan M Knight, Andrew White, Ansar A Pathan, Helen McShane, Thomas G Evans, Helen Fletcher, Sally Sharpe, Richard G White
Macaques play a central role in the development of human tuberculosis (TB) vaccines. Immune and challenge responses differ across macaque and human subpopulations. We used novel immunostimulation/immunodynamic modeling methods in a proof-of-concept study to determine which macaque subpopulations best predicted immune responses in different human subpopulations. Data on gamma interferon (IFN-γ)-secreting CD4(+) T cells over time after recent Mycobacterium bovis BCG vaccination were available for 55 humans and 81 macaques...
March 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28077440/monophosphoryl-lipid-a-enhances-efficacy-of-a-francisella-tularensis-lvs-catanionic-nanoparticle-subunit-vaccine-against-f-tularensis-schu-s4-challenge-by-augmenting-both-humoral-and-cellular-immunity
#19
Katharina Richard, Barbara J Mann, Aiping Qin, Eileen M Barry, Robert K Ernst, Stefanie N Vogel
Francisella tularensis, a bacterial biothreat agent, has no approved vaccine in the United States. Previously, we showed that incorporating lysates from partially attenuated F. tularensis LVS or fully virulent F. tularensis Schu S4 strains into catanionic surfactant vesicle (V) nanoparticles (LVS-V and Schu S4-V, respectively) protected fully against F. tularensis LVS intraperitoneal (i.p.) challenge in mice. However, we achieved only partial protection against F. tularensis Schu S4 intranasal (i.n.) challenge, even when employing heterologous prime-boost immunization strategies...
March 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28031178/otitis-prone-children-produce-functional-antibodies-to-pneumolysin-and-pneumococcal-polysaccharides
#20
Lea-Ann S Kirkham, Selma P Wiertsema, Karli J Corscadden, Tulia Mateus, Gemma L Mullaney, Guicheng Zhang, Peter C Richmond, Ruth B Thornton
The pneumococcus is a major otitis media (OM) pathogen, but data are conflicting regarding whether otitis-prone children have impaired humoral immunity to pneumococcal antigens. We and others have shown that otitis-prone and healthy children have similar antibody titers to pneumococcal proteins and polysaccharides (vaccine and nonvaccine types); however, the quality of antibodies from otitis-prone children has not been investigated. Antibody function, rather than titer, is considered to be a better correlate of protection from pneumococcal disease...
March 2017: Clinical and Vaccine Immunology: CVI
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