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Antigens Involved in Adaptive Immunity

Antigens Involved in Adaptive Immunity

An antigen is any substance the immune system identifies as foreign and potentially harmful to the body, prompting an immune response. Antigens have two functional properties: immunogenicity and reactivity. Immunogenicity is the ability of an antigen to stimulate a specific immune response. At the same time, reactivity describes the antigen's ability to react with the cells and antibodies produced in response to it.
Complete Antigens
Complete antigens possess both immunogenicity and reactivity.

Transcytosis of IgG

Transcytosis of IgG

Transcytosis is the process in which molecules are internalized by endocytosis, transported across the cell, and released through exocytosis from the opposite end of the cell. Molecules such as insulin, immunoglobulins, and certain nutrients are transferred through the recycling endosomes by recycling and transcytosis.
IgG molecules from a mother undergo transcytosis starting around 13 weeks of gestation. The amount of IgG transferred and entering the fetal blood circulation increases with...

Diversity of Antigen Receptors

Diversity of Antigen Receptors

Antigen receptors are essential components of the immune system crucial in defending the body against foreign invaders. These receptors are present on the surface of B and T cells, enabling them to recognize antigens and mount an appropriate immune response.
Before encountering any antigen, lymphocytes express these receptors. On B cells, the antigen receptor is a membrane-bound antibody molecule called BCR; on T cells, it is a T cell receptor or TCR. B and T cell receptors are composed of two...

What is Monogastric Digestion?

What is Monogastric Digestion?

The human body contains a monogastric digestive system. In a monogastric digestive system, the stomach only contains one chamber in which it digests food. Several other animal species also have monogastric digestive systems, including pigs, horses, dogs, and birds. This chapter, however, focuses on the human digestive system.

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A Galleria mellonella Oral Administration Model to Study Commensal-Induced Innate Immune Responses

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Published on: March 21, 2019

Gastropod immunobiology.

¹Center for Evolutionary and Theoretical Immunology, Department of Biology, University of New Mexico, Albuquerque, New Mexico, USA. esloker@unm.edu

Advances in Experimental Medicine and Biology

|May 3, 2011

Summary

This summary is machine-generated.

Gastropod immunity is complex, involving sophisticated defenses against pathogens like digenetic trematodes. Understanding snail immune responses is crucial for conserving gastropod diversity and managing diseases.

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Area of Science:

Invertebrate immunology
Gastropod biology
Parasitology

Background:

Gastropods exhibit diverse life histories and face numerous pathogens.
Gastropod immunobiology remains largely unexplored due to limited diversity studies.
Research often focuses on snail-parasite interactions, particularly digenetic trematodes.

Purpose of the Study:

To provide an overview of the gastropod immunome.
To highlight the complexity of gastropod immune responses.
To underscore the importance of gastropod immunobiology for conservation.

Main Methods:

Review of existing literature on gastropod immunology.
Analysis of host-parasite interactions, focusing on digenetic trematodes.
Examination of immune defense mechanisms, including hemolymph lectins.

Main Results:

Gastropods employ diverse immune strategies against pathogens.
Parasites like digeneans subvert snail defenses through mimicry and immune suppression.
Gastropod immune responses can be sophisticated, involving diversified molecules like lectins.
Evidence suggests potential for elevated secondary immune responses.

Conclusions:

Gastropod immune systems are more complex than previously thought.
Understanding gastropod immunity is vital for parasite control and conservation efforts.
Further research into gastropod immunobiology is warranted.