Nutritional Effects on Hematological and Immunological Responses of Mice Exposed to Diacetoxyscirpenol (DAS)

1989 ◽  
Vol 8 (5-6) ◽  
pp. 321-331 ◽  
Author(s):  
Vora S. Suphiphat ◽  
Suda Riengropitak ◽  
Somphong Sahaphong ◽  
Paul M. Newberne
Keyword(s):  
Immunological Responses ◽  
Nutritional Effects

scholarly journals Adverse immunological responses against non-viral nanoparticle (NP) delivery systems in the lung

2021 ◽  
Vol 18 (1) ◽  
pp. 61-73
Author(s):  
Leonor de Braganca ◽  
G. John Ferguson ◽  
Jose Luis Santos ◽  
Jeremy P. Derrick
Keyword(s):  
Delivery Systems ◽  
Immunological Responses ◽  
Viral Nanoparticle

scholarly journals Gut microbiota modulation induced by Zika virus infection in immunocompetent mice

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Rafael Corrêa ◽  
Igor de Oliveira Santos ◽  
Heloísa Antoniella Braz-de-Melo ◽  
Lívia Pimentel de Sant’Ana ◽  
Raquel das Neves Almeida ◽  
...  
Keyword(s):  
Gut Microbiota ◽  
Gut Microbiome ◽  
Zika Virus ◽  
Hypervariable Region ◽  
Microbiota Composition ◽  
Colon Tissue ◽  
Zikv Infection ◽  
Immunological Responses ◽  
Immunocompetent Mice ◽  
Gut Microbiota Composition

AbstractGut microbiota composition can modulate neuroendocrine function, inflammation, and cellular and immunological responses against different pathogens, including viruses. Zika virus (ZIKV) can infect adult immunocompetent individuals and trigger brain damage and antiviral responses. However, it is not known whether ZIKV infection could impact the gut microbiome from adult immunocompetent mice. Here, we investigated modifications induced by ZIKV infection in the gut microbiome of immunocompetent C57BL/6J mice. Adult C57BL/6J mice were infected with ZIKV and the gut microbiota composition was analyzed by next-generation sequencing of the V4 hypervariable region present in the bacterial 16S rDNA gene. Our data showed that ZIKV infection triggered a significant decrease in the bacteria belonging to Actinobacteria and Firmicutes phyla, and increased Deferribacteres and Spirochaetes phyla components compared to uninfected mice. Interestingly, ZIKV infection triggered a significant increase in the abundance of bacteria from the Spirochaetaceae family in the gut microbiota. Lastly, we demonstrated that modulation of microbiota induced by ZIKV infection may lead to intestinal epithelium damage and intense leukocyte recruitment to the intestinal mucosa. Taken together, our data demonstrate that ZIKV infection can impact the gut microbiota composition and colon tissue homeostasis in adult immunocompetent mice.

Effect of Brachionus plicatilis and Navicula sp. on Pacific white shrimp growth performance, Vibrio, immunological responses and resistance to white spot virus (WSSV) in nursery biofloc system

Aquaculture ◽  
2021 ◽  
pp. 736335
Author(s):  
Allyne Elins Moreira da Silva ◽  
Luis Otavio Brito ◽  
Danielle Alves da Silva ◽  
Priscilla Celes Maciel de Lima ◽  
Renata da Silva Farias ◽  
...  
Keyword(s):  
Growth Performance ◽  
Brachionus Plicatilis ◽  
Pacific White Shrimp ◽  
White Spot ◽  
White Shrimp ◽  
Spot Virus ◽  
Immunological Responses

Yeast extract on growth, nutrient utilization and haemato-immunological responses of Nile tilapia

2015 ◽  
Vol 47 (8) ◽  
pp. 2650-2660 ◽  
Author(s):  
Ricardo da Silva Berto ◽  
Gabriella do Vale Pereira ◽  
José Luiz Pedreira Mouriño ◽  
Maurício Laterça Martins ◽  
Débora Machado Fracalossi
Keyword(s):  
Yeast Extract ◽  
Nile Tilapia ◽  
Nutrient Utilization ◽  
Immunological Responses

scholarly journals Antigen-Specific Immunoglobulin A Antibodies Secreted from Circulating B Cells Are an Effective Marker for Recent Local Immune Responses in Patients with Cholera: Comparison to Antibody-Secreting Cell Responses and Other Immunological Markers

2003 ◽  
Vol 71 (8) ◽  
pp. 4808-4814 ◽  
Author(s):  
Firdausi Qadri ◽  
Edward T. Ryan ◽  
A. S. G. Faruque ◽  
Firoz Ahmed ◽  
Ashraful Islam Khan ◽  
...  
Keyword(s):  
Immune Responses ◽  
Immunoglobulin A ◽  
Peripheral Circulation ◽  
Secreting Cell ◽  
Antibody Secreting Cell ◽  
Immunological Responses ◽  
B Subunit ◽  
Mucosal Infection ◽  
Circulating Lymphocytes

ABSTRACT Gut-derived lymphocytes transiently migrate through the peripheral circulation before homing back to mucosal sites and can be detected using an ELISPOT-based antibody secreting cell (ASC) assay. Alternatively, transiently circulating lymphocytes may be cultured in vitro, and culture supernatants may be assayed for antigen-specific responses (antibody in lymphocyte supernatant [ALS] assay). The ALS assay has not been validated extensively in natural mucosal infection, nor has the ALS response been compared to the ASC assay and other cholera-specific immunological responses. Accordingly, we examined immune responses in 30 adult patients with acute cholera in Bangladesh, compared with 10 healthy controls, measuring ALS-immunoglobulin A (IgA), ASC-IgA, and serum and fecal IgA responses to two potent Vibrio cholerae immunogens, the nontoxic B subunit of cholera toxin (CtxB) and lipopolysaccharide (LPS) and a weaker V. cholerae immunogen, the mannose-sensitive hemagglutinin (MSHA). We found significant increases of anti-CtxB, anti-LPS, and anti-MSHA IgA in supernatants of lymphocytes cultured 7 days after onset of cholera using the ALS assay. We found that ALS and ASC responses correlated extremely well; both had comparable sensitivities as the vibriocidal responses, and both procedures were more sensitive than fecal IgA measurements. An advantage of the ALS assay for studying mucosal immune responses is the ability to freeze antibodies in supernatants for subsequent evaluation; like the ASC assay, the ALS assay can distinguish recent from remote mucosal infection, a distinction that may be difficult to make in endemic settings using other procedures.

scholarly journals Circulating Tfh cell and subsets distribution are associated with low‐responsiveness to hepatitis B vaccination

2021 ◽  
Vol 27 (1) ◽  
Author(s):  
Mingjuan Yin ◽  
Yongzhen Xiong ◽  
Dongmei Liang ◽  
Hao Tang ◽  
Qian Hong ◽  
...  
Keyword(s):  
Hepatitis B ◽  
Hepatitis B Vaccine ◽  
Hepatitis B Vaccination ◽  
Cellular Mechanisms ◽  
Immunological Responses ◽  
Follicular Helper ◽  
Low Responders ◽  
Specific Subset ◽  
Antibody Titers

Abstract Background An estimated 5–10 % of healthy vaccinees lack adequate antibody response following receipt of a standard three-dose hepatitis B vaccination regimen. The cellular mechanisms responsible for poor immunological responses to hepatitis B vaccine have not been fully elucidated to date. Methods There were 61 low responders and 56 hyper responders involved in our study. Peripheral blood samples were mainly collected at D7, D14 and D28 after revaccinated with a further dose of 20 µg of recombinant hepatitis B vaccine. Results We found low responders to the hepatitis B vaccine presented lower frequencies of circulating follicular helper T (cTfh) cells, plasmablasts and a profound skewing away from cTfh2 and cTfh17 cells both toward cTfh1 cells. Importantly, the skewing of Tfh cell subsets correlated with IL-21 and protective antibody titers. Based on the key role of microRNAs involved in Tfh cell differentiation, we revealed miR-19b-1 and miR-92a-1 correlated with the cTfh cell subsets distribution and antibody production. Conclusions Our findings highlighted a decrease in cTfh cells and specific subset skewing contribute to reduced antibody responses in low responders.

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