scholarly journals IFN-α Boosting of Mycobacterium bovis Bacillus Calmette Güerin-Vaccine Promoted Th1 Type Cellular Response and Protection against M. tuberculosis Infection

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
C. E. Rivas-Santiago ◽  
G. G. Guerrero
Keyword(s):  
Immune Response ◽  
Mycobacterium Bovis ◽  
Cellular Immune Response ◽  
Cellular Response ◽  
Bacterial Load ◽  
Bcg Vaccine ◽  
Type I ◽  
Bacillus Calmette Guerin ◽  
Type I Ifns ◽  
Cellular Immune

The role of type I IFNs in the pathogenesis and control of mycobacterial infection is still controversial. It has been reported that type I IFNs exacerbated M. tuberculosis infection through hampering Th1 type cellular immune response. However, under certain conditions they can act as natural immune adjuvants for commercial vaccines. At this point, we have reported recently that successive IFN-alpha boosting of Mycobacterium bovis Bacillus Calmette Güerin (BCG) vaccinated mice protected adult mice from intradermal M. lepraemurium infection and a difference in iNOS was observed. In the present work, we have found that intramuscular IFN-α boosting of Mycobacterium bovis Bacillus Calmette Güerin (BCG) vaccine, either in vitro (human cell line or macrophages derived from PBMC) or in vivo (aerosol mouse model of MTb infection), promoted mostly the development of specific anti-antimycobacterial Th1 type cytokines (IFN-γ; IL-12, TNF-alpha, and IL-17; IL1β) while bacterial load reduction (0.9 logs versus PBS or BCG vaccine) was observed. These findings indicate that, under the experimental settings reported here, interferon alpha can drive or affect the TH cellular immune response in favour of BCG-inducing immunity against M. tuberculosis infection.

scholarly journals Cellular Immune Response against Nontypeable Haemophilus influenzae Infecting the Preinflamed Middle Ear of the Junbo Mouse

2019 ◽  
Vol 87 (12) ◽  
Author(s):  
Pratik P. Vikhe ◽  
Tom Purnell ◽  
Steve D. M. Brown ◽  
Derek W. Hood
Keyword(s):  
Immune Response ◽  
Haemophilus Influenzae ◽  
Cell Population ◽  
Middle Ear ◽  
Cellular Immune Response ◽  
Cellular Response ◽  
Transforming Growth Factor ◽  
Immune Cell ◽  
Acute Otitis Media ◽  
Cellular Immune

ABSTRACT Nontypeable Haemophilus influenzae (NTHi) is a major pathogen causing acute otitis media (AOM). The pathology of AOM increases during long-term infection in the middle ear (ME), but the host cellular immune response to bacterial infection in this inflamed environment is poorly understood. Using the Junbo mouse, a characterized NTHi infection model, we analyzed the cellular response to NTHi infection in the Junbo mouse middle ear fluid (MEF). NTHi infection increased the total cell number and significantly decreased the proportion of live cells in the MEF at day 1, and this further decreased gradually on each day up to day 7. Flow cytometry analysis showed that neutrophils were the dominant immune cell population in the MEF and that NTHi infection significantly increased their proportion whereas it decreased the monocyte, macrophage, and dendritic cell proportions. Neutrophil and macrophage numbers increased in blood and spleen after NTHi infection. The T-cell population was dominated by T-helper (Th) cells in noninoculated MEF, and the effector Th (CD44+) cell population increased at day 2 of NTHi infection with an increase in IL-12p40 levels. Sustained NTHi infection up to 3 days increased the transforming growth factor β levels, decreasing the effector cell population and increasing the T-regulatory (T-reg) cell population. In the preinflamed ME environment of the Junbo mouse, neutrophils are the first responder to NTHi infection followed by T-reg immune suppressive cells. These data indicate that sustained NTHi infection in the ME induces the immune suppressive response by inducing the T-reg cell population and reducing immune cell infiltration, thus promoting longer-term infection.

Complementary Presence of HBV-Specific Humoral and T-Cellular Immune Response Provide the Long-Lasting Immune Protection After Neonatal Immunization

2021 ◽  
Author(s):  
Yunmei Huang ◽  
Yuting Yang ◽  
Tingting Wu ◽  
Zhiyu Li ◽  
Yao Zhao
Keyword(s):  
Immune Response ◽  
T Cell ◽  
Hepatitis B ◽  
Cell Response ◽  
Cellular Immune Response ◽  
Cellular Response ◽  
T Cell Response ◽  
Hbv Infection ◽  
Hepatitis B Vaccination ◽  
Cellular Immune

Abstract Background: Hepatitis B vaccination is the most cost-effective way to prevent HBV infection. Currently, hepatitis B vaccine (HepB) efficacy was usually assessed by anti-HBs level, but there were little comprehensive analyses of humoral and cellular immune response to HepB in children after neonatal immunization. Methods: A total of 145 children with primary hepatitis B immunization history were involved in this study to evaluate the efficacy of HepB. Blood samples were obtained from 80 eligible children before one dose of HepB booster and 41 children post-booster. Children with anti-HBs at a low level (<10mIU/mL and [10,100) mIU/mL) were received one dose of HepB booster after informed consent. Subjects were be measured anti-HBs, HBsAg-specific T cell responses and frequency of B cell subsets before and after booster. Results: Among 80 subjects, 81.36% of children showed both T cell and anti-HBs responses positive at baseline. After one dose of booster, anti-HBs titer (P<0.0001), positive rate of HBsAg-specific T cell response (P=0.0036) and magnitude of SFCs (P=0.0003) increased significantly. Comparing preexisting anti-HBs titer <10mIU/mL with anti-HBs titer [10,100) mIU/mL, anti-HBs response (P=0.0005) and HBsAg-specific T lymphocyte response (P<0.0001) increased significantly. The change tendency of HBV specific humoral response is complementary to T cellular response with age. Conclusion: Protection from primary HBV immunization persists long on account of the complementary presence of HBV-specific humoral and T-cellular immune response. One dose of HepB booster is efficient enough to produce protective anti-HBs and enhance HBsAg-specific T cell response. In the HBV endemic areas, HepB booster immunization is still the most economical and effective way to prevent HBV infection, especially in children without anti-HBs.

scholarly journals Therapeutic Vaccination with Cationic Liposomes Formulated with Dioctadecyldimethylammonium and Trehalose Dibehenate (CAF01) and Peptide P10 Is Protective in Mice Infected with Paracoccidioides brasiliensis

2020 ◽  
Vol 6 (4) ◽  
pp. 347
Author(s):  
Marcelo Valdemir de Araújo ◽  
Samuel Rodrigues Dos Santos Júnior ◽  
Joshua D. Nosanchuk ◽  
Carlos Pelleschi Taborda
Keyword(s):  
Immune Response ◽  
Cellular Immune Response ◽  
Cellular Response ◽  
Paracoccidioides Brasiliensis ◽  
Cationic Liposomes ◽  
Fungal Species ◽  
Th17 Cytokines ◽  
Paracoccidioides Spp ◽  
Granulomatous Tissue ◽  
Cellular Immune

The peptide P10 is a vaccine candidate for Paracoccidioidomycosis, a systemic mycosis caused by fungal species of the genus Paracoccidioides spp. We have previously shown that peptide P10 vaccination, in the presence of several different adjuvants, induced a protective cellular immune response mediated by CD4+ Th1 lymphocytes that was associated with the increased production of IFN-γ in mice challenged with a virulent isolate of Paracoccidoides brasiliensis. Cationic liposomes formulated with dioctadecyldimethylammonium and trehalose dibehenate (DDA/TDB, termed also CAF01–cationic adjuvant formulation) have been developed for safe administration in humans and CAF01 liposomes are utilized as an adjuvant for modulating a robust Th1/Th17 cellular response. We evaluated the efficacy of the adsorption of peptide P10 to CAF01 cationic liposomes and used the generated liposomes to vaccinate C57Bl/6 mice infected with P. brasiliensis. Our results showed that P10 was efficiently adsorbed onto CAF01 liposomes. The vaccination of infected mice with cationic liposomes formulated with DDA/TDB 250/50 µg/mL and 20 µg of P10 induced an effective cellular immune response with increased levels of Th17 cytokines, which correlated with significant decreases in the fungal burdens in lungs and protective granulomatous tissue responses. Hence, cationic liposomes of DDA/TDB 250/50 µg/mL with 20 µg of P10 are a promising therapeutic for safely and effectively improving the treatment of paracoccidioidomycosis.

Impaired Bacillus Calmette–Guérin cellular immune response in HIV-exposed, uninfected infants

AIDS ◽  
2011 ◽  
Vol 25 (17) ◽  
pp. 2079-2087 ◽  
Author(s):  
Taís N. Mazzola ◽  
Marcos T.N. da Silva ◽  
Beatriz M. Abramczuk ◽  
Yara M.F. Moreno ◽  
Simone C.B.S. Lima ◽  
...  
Keyword(s):  
Immune Response ◽  
Cellular Immune Response ◽  
Bacillus Calmette Guerin ◽  
Hiv Exposed ◽  
Cellular Immune ◽  
Exposed Uninfected

scholarly journals Gestational pertussis vaccination and the infant’s cellular immune response against whole-cell pertussis vaccine in the first year of life

2019 ◽  
Author(s):  
Carolina Argondizo-Correia ◽  
Lourdes Rehder de Andrade Vaz-de-Lima ◽  
Elaine Uchima Uehara ◽  
Eder Gatti Fernandes ◽  
Helena Keico Sato ◽  
...  
Keyword(s):  
Immune Response ◽  
Young Children ◽  
Cellular Immune Response ◽  
Early Life ◽  
Cellular Response ◽  
Booster Dose ◽  
Maternal Antibodies ◽  
Maternal Vaccination ◽  
Maternal Immunisation ◽  
Cellular Immune

AbstractPertussis resurgence worldwide calls for new prevention strategies, as the recently incorporated vaccine booster dose during pregnancy, whose aim is to protect newborns from infection. In Brazil, maternal Tdap vaccination is recommended since 2014, and we reported that this strategy promotes high transplacental transfer of anti-PT IgG and it is effective in protecting infants early in life. Young children are the most susceptible group and with higher mortality rates, however, it is not well known whether the elicited anti-pertussis maternal antibodies could influence in the children’s immune responses further in life, especially after their own vaccination against pertussis. Considering this scenario, we conducted a study with children born to mothers who either received or not the booster dose during pregnancy, after their primary pertussis vaccination, in order to investigate the first impact of maternal immunisation on the response to infant immunisation regarding the cellular immune response, while comparing with data from the literature. As transfer of maternal antibodies could result in attenuation of the immune response to vaccination in infants, this study performed to determine whether higher levels of maternal antibodies could influence in the immune response of infants to the whole-pertussis vaccination series. Results showed no difference in cytokine production between groups, a first suggestion that maternal vaccination may not interfere with recognition and cellular response generation to vaccination. This data, together with humoral immunity and epidemiological studies, is important for the implementation of maternal immunisation strategies nationwide and will contribute to assure public policies regarding vaccination schemes.ImportancePertussis, or whopping cough, is a respiratory infectious disease caused by a bacterial agent, resulting in violent coughs and possibly death in vulnerable groups, such as young children and neonates. It is known that pregnant mothers transfer antibodies to their developing foetuses for protection in early life, however anti-pertussis antibodies are not highly detected in young children. Thus, a pertussis maternal vaccination was implemented to increase maternal anti-pertussis antibodies levels in pregnant women and therefore the transference to the foetus. However, maternal antibodies can also interfere in the child immune response in the first months of life. The significance of our research is in analysing the cellular immune response of children born from pertussis-vaccinated mothers, which will give a first glimpse on how maternal antibodies could modulate the child’s response to pertussis in early life.

A disease-associated cellular immune response in type I diabetics to an immunodominant epitope of insulin

2000 ◽  
Vol 50 ◽  
pp. 165
Author(s):  
David G Alleva ◽  
Liping Jin ◽  
Paul D Crowe ◽  
William W Kwok ◽  
Nick Ling ◽  
...  
Keyword(s):  
Immune Response ◽  
Cellular Immune Response ◽  
Type I ◽  
Immunodominant Epitope ◽  
Cellular Immune

scholarly journals SARS-CoV-2 cellular immune response in uninfected health care workers with prolonged and close exposure to COVID-19 patients

2020 ◽  
Author(s):  
Alejandro Vallejo ◽  
Pilar Vizcarra ◽  
Carmen Quereda ◽  
Ana Moreno ◽  
Jose L Casado
Keyword(s):  
Health Care ◽  
Immune Response ◽  
Health Care Workers ◽  
Cellular Immune Response ◽  
Cellular Response ◽  
Cytokine Production ◽  
Th2 Response ◽  
Care Workers ◽  
Cellular Immune ◽  
The Impact

Abstract Health care workers (HCW) are at an increased risk since they are directly exposed to SARS-CoV-2 infected patients, nevertheless, some remained without the development of anti-SARS-CoV-2 antibodies, suggesting lesser susceptibility to infection1-5. This study aimed to ascertain a potential specific cellular immune response to SARS-CoV-2 in these largely exposed HCWs.In this cross-sectional, case-control study, we analyzed 39 exposed uninfected HCWs and 17 convalescent HCWs. Cellular immune response was evaluated after SARS-CoV-2 stimulation with peptide pools (proteins S, M, and N), using bead-based multiplex assay (12 cytokines).Overall, 94.8% of uninfected HCWs had some degree of specific cellular response to SARS-CoV-2 structural proteins that could be classified, according to the number of cytokine production, as strong (61.5%), partial (33.3%), and weak/no response (5.1%). Strong responders showed a higher anti-inflammatory cytokine production (IL5 and IL10, p<0.001 and 0.002, respectively), and similar (IFN-γ and TNF-α, p=0.435 and 0.532, respectively) or higher (IL12, p=0.021) pro-inflammatory production compared to convalescents, resulted in a predominantly Th2 response. This study demonstrated a consistent and polyfunctional immune cellular response after stimulation with SARS-CoV-2 peptides in extensively exposed individuals that should be considered to establish the infection susceptibility, the impact in herd immunity, and the risk of relapses.

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