Related Experiment Video
Updated: Jun 25, 2026
11:49
Surgical Induction of Endolymphatic Hydrops by Obliteration of the Endolymphatic Duct
Published on: January 23, 2010
[Clearance function of endolymphatic sac to extraneous TD-antigen]
Xiaowen Huang1, Hongjun Xiao, Jibao Wang
1Department of Otolaryngology,Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030.
Lin Chuang Er Bi Yan Hou Ke Za Zhi = Journal of Clinical Otorhinolaryngology
|November 2, 2004
Summary
The rat endolymphatic sac demonstrates immune defense by phagocytizing and clearing thymus-dependent antigens from the inner ear. This study confirms the endolymphatic sac
Area of Science:
- Immunology
- Otolaryngology
- Cell Biology
Context:
- The endolymphatic sac plays a crucial role in inner ear homeostasis.
- Its immune functions in response to foreign antigens are not fully understood.
- Investigating antigen clearance mechanisms is vital for understanding inner ear immune responses.
Purpose:
- To investigate the clearance function of the rat endolymphatic sac against thymus-dependent (TD) antigens.
- To characterize the temporal dynamics of antigen presence and clearance within the endolymphatic sac.
- To elucidate the role of the endolymphatic sac in inner ear immune defense.
Summary:
- Rats were systemically sensitized and then inoculated with keyhole limpet hemocyanin (KLH) into the labyrinth.
- Immunohistochemical analysis revealed antigen presence in the endolymphatic sac as early as 3 hours post-inoculation.
- The endolymphatic sac actively trapped and phagocytized KLH, with antigen levels decreasing over 14 days, while cochlear antigen levels reduced.
Impact:
- This study provides evidence for the endolymphatic sac's capacity to phagocytize, process, and remove extraneous antigens.
- It validates the immune defense function of the endolymphatic sac within the context of inner ear immune responses.
- Findings contribute to a deeper understanding of the immunobiology of the inner ear and potential therapeutic targets.
Related Concept Videos
01:26Antigens 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.
Complete Antigens
Complete antigens possess both immunogenicity and reactivity.
01:22Antigen Presenting Cells
The immune system is a complex network of cells and molecules that protects the body from foreign invaders. T cells, a type of white blood cell, play a crucial role in this process. They recognize and attack foreign substances, such as pathogens, that enter the body.
T cells require the help of antigen-presenting cells (APCs), which process foreign antigens into smaller fragments that can be recognized by T cells. These APCs are highly specialized cells that efficiently internalize antigens...
T cells require the help of antigen-presenting cells (APCs), which process foreign antigens into smaller fragments that can be recognized by T cells. These APCs are highly specialized cells that efficiently internalize antigens...
01:31Antigen Processing Pathways
MHC molecules are key players in the immune response, enabling T cells to recognize and respond to specific antigens. They are present on the surface of all nucleated cells in the body and are instrumental in presenting antigens to T cells and activating them. T cells recognize the MHC-antigen complex and initiate an immune response. MHC class I and MHC class II are two main types of MHC molecules, each associated with a distinct antigen processing pathway.
MHC Class I: Presenting Endogenous...
MHC Class I: Presenting Endogenous...
01:22T Cell Activation and Clonal Selection
T cells are integral to our adaptive immune system, recognizing and effectively responding to foreign antigens. T cell activation and clonal selection are pivotal in orchestrating this immune response. This article elucidates these mechanisms, detailing the roles of cluster of differentiation (CD) markers, major histocompatibility complex (MHC) molecules, costimulatory signals, and the process of clonal selection.
Naive T cells that have not yet encountered an antigen express two primary CD...
Naive T cells that have not yet encountered an antigen express two primary CD...
01:24B Cell Activation and Differentiation
The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...