scholarly journals 1 CHANGES IN MUCOSAL MORPHOLOGY AND THE RATE OF CRYPT CELL RENEWAL INDUCED BY A CELL MEDIATED IMMUNE RESPONSE IN HUMAN SMALL INTESTINE

1988 ◽  
Vol 24 (3) ◽  
pp. 405-405
Author(s):  
R Cunha Ferreira ◽  
T T MacDonald
Keyword(s):  
Immune Response ◽  
Small Intestine ◽  
Crypt Cell ◽  
Cell Renewal ◽  
Human Small Intestine ◽  
Cell Mediated Immune Response ◽  
A Cell ◽  
Mucosal Morphology

scholarly journals Human Coronaviruses: Counteracting the Damage by Storm

Viruses ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1457
Author(s):  
Dewald Schoeman ◽  
Burtram C. Fielding
Keyword(s):  
Immune Response ◽  
Severe Disease ◽  
Antiviral Agents ◽  
The Elderly ◽  
Highly Pathogenic ◽  
Vaccine Responses ◽  
Cell Mediated Immune Response ◽  
Inhibition Antibody ◽  
A Cell ◽  
Human Coronaviruses

Over the past 18 years, three highly pathogenic human (h) coronaviruses (CoVs) have caused severe outbreaks, the most recent causative agent, SARS-CoV-2, being the first to cause a pandemic. Although much progress has been made since the COVID-19 pandemic started, much about SARS-CoV-2 and its disease, COVID-19, is still poorly understood. The highly pathogenic hCoVs differ in some respects, but also share some similarities in clinical presentation, the risk factors associated with severe disease, and the characteristic immunopathology associated with the progression to severe disease. This review aims to highlight these overlapping aspects of the highly pathogenic hCoVs—SARS-CoV, MERS-CoV, and SARS-CoV-2—briefly discussing the importance of an appropriately regulated immune response; how the immune response to these highly pathogenic hCoVs might be dysregulated through interferon (IFN) inhibition, antibody-dependent enhancement (ADE), and long non-coding RNA (lncRNA); and how these could link to the ensuing cytokine storm. The treatment approaches to highly pathogenic hCoV infections are discussed and it is suggested that a greater focus be placed on T-cell vaccines that elicit a cell-mediated immune response, using rapamycin as a potential agent to improve vaccine responses in the elderly and obese, and the potential of stapled peptides as antiviral agents.

scholarly journals Saccharomyces boulardii modulates and improves the immune response to Bovine Herpesvirus type 5 Vaccine

2018 ◽  
Vol 70 (2) ◽  
pp. 375-381 ◽  
Author(s):  
T.B. Roos ◽  
L.F.C. Avila ◽  
R.T. Sturbelle ◽  
F.L.L. Leite ◽  
G. Fischer ◽  
...  
Keyword(s):  
Immune Response ◽  
Animal Health ◽  
Bovine Herpesvirus ◽  
Saccharomyces Boulardii ◽  
Igg Antibody ◽  
Th1 Response ◽  
Herpesvirus Type ◽  
Cell Mediated Immune Response ◽  
A Cell ◽  
Bovine Herpesvirus Type 5

ABSTRACT There have been significant efforts towards the development of more efficient vaccines for animal health. A strategy that may be used to improve vaccine efficacy is the use of probiotics to enhance the immune response of the host, leading to increased immunogenicity of antigen preparations. Bovine herpesvirus 5 (BoHV-5) is an example of an important animal pathogen for which vaccines have provided only limited protection. In this study, we examined the use of the probiotic Saccharomyces boulardii (Sb) as a potential adjuvant to improve vaccine efficiency. We found that the supplemented animals exhibited an enhanced systemic IgG antibody response toward a Th1 response in favor of IgG2a and increased mRNA expression levels of the cytokines IFN-y, IL-12, IL-17 and IL-10 in the spleen. These results suggest that Sb supplementation may provide a promising means for improving the efficiency of vaccines, particularly those that rely on a cell-mediated immune response.

scholarly journals Anterior Chamber-Associated Immune Deviation (ACAID): An Acute Response to Ocular Insult Protects from Future Immune-Mediated Damage?

2009 ◽  
Vol 1 ◽  
pp. OED.S2858 ◽  
Author(s):  
Robert E. Cone ◽  
Roshan Pais
Keyword(s):  
Immune Response ◽  
Anterior Chamber ◽  
Defense Mechanisms ◽  
Immune Defense ◽  
Ocular Tissue ◽  
Immune Deviation ◽  
Acute Response ◽  
Cell Mediated Immune Response ◽  
A Cell ◽  
Humoral Responses

The “immune privilege” that inhibits immune defense mechanisms that could lead to damage to sensitive ocular tissue is based on the expression of immunosuppressive factors on ocular tissue and in ocular fluids. In addition to this environmental protection, the injection of antigen into the anterior chamber or infection in the anterior chamber induces a systemic suppression of potentially damaging cell-mediated and humoral responses to the antigen. Here we discuss evidence that suggests that Anterior Chamber-Associated Immune Deviation (ACAID)a is initiated by an ocular response to moderate inflammation that leads to a systemic immunoregulatory response. Injection into the anterior chamber induces a rise in TNF-α and MCP-1 in aqueous humor and an infiltration of circulating F4/80+ monocytes that home to the iris. The induction of ACAID is dependent on this infiltration of circulating monocytes that eventually emigrate to the thymus and spleen where they induce regulatory T cells that inhibit the inductive or effector phases of a cell-mediated immune response. ACAID therefore protects the eye from the collateral damage of an immune response to infection by suppressing a future potentially damaging response to infection.

Inducing a cell-mediated immune response against peptides of thePlasmodium vivaxcircumsporozoite protein

2001 ◽  
Vol 95 (6) ◽  
pp. 573-586 ◽  
Author(s):  
B. E. Thomas ◽  
K. Sridevi ◽  
N. Chopra ◽  
W. Haq ◽  
D. N. Rao
Keyword(s):  
Immune Response ◽  
Cell Mediated Immune Response ◽  
A Cell

Repressed E-cadherin expression in the lower crypt of human small intestine: a cell marker of functional relevance

2005 ◽  
Vol 302 (2) ◽  
pp. 206-220 ◽  
Author(s):  
Fabrice Escaffit ◽  
Nathalie Perreault ◽  
Dominique Jean ◽  
Caroline Francoeur ◽  
Elizabeth Herring ◽  
...  
Keyword(s):  
Small Intestine ◽  
Cell Marker ◽  
Human Small Intestine ◽  
A Cell ◽  
Functional Relevance ◽  
E Cadherin

A growth-stimulating activity derived from the proximal small intestine is associated with an adaptive response

1990 ◽  
Vol 68 (5) ◽  
pp. 646-649 ◽  
Author(s):  
V. L. Grey ◽  
C. L. Morin
Keyword(s):  
Cell Proliferation ◽  
Small Intestine ◽  
Thymidine Kinase ◽  
Kinase Activity ◽  
Crypt Cell ◽  
General Mechanism ◽  
Cell Renewal ◽  
Thymidine Kinase Activity ◽  
Crypt Cell Proliferation ◽  
Proximal Intestine

Luminal nutrition is important for the maintenance of small intestinal structure and function. The equilibrium between crypt cell production and villous cell loss in the mucosal epithelium of the small intestine is altered under certain conditions such as after a small bowel resection. Immediately after resection, there is a marked increase in crypt cell proliferation giving rise to an adaptive hyperplasia in the remnant intestine and for this response luminal nutrition is a critical factor. We have previously demonstrated the presence of a growth-stimulating (GS) activity in a heat-stable acidic extract of the rat proximal intestine 24, 48, and 96 h after resection, which is coincidental with an increase in crypt cell proliferation as measured by thymidine kinase activity. Eight days after resection when the GS activity is no longer detectable, the thymidine kinase activity returns to control values. The molecular weights of the peptides associated with this GS activity are 4500 and 1500, as determined by Sephadex gel filtration. Of note is that the oral intake of food is necessary for the appearance of the GS activity postoperatively. The presence of the GS activity has also been demonstrated upon refeeding after a fast, as well as at weaning in the rat, two physiological situations known to be associated with increased proliferation in the small intestine. This GS activity in the proximal intestine first detected in the resection model may represent a general mechanism by which food controls the cell renewal pattern of the small intestine.Key words: stimulating activity, proximal intestine, adaptation.

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