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[HTLV-I and retinal antigen recognized by T cells]
A Fukushima1, H Ueno, S Fujimoto
1Department of Ophthalmology, Kochi Medical School, Japan.
Nippon Ganka Gakkai Zasshi
|February 1, 1994
Summary
Murine spleen cells from immune but not naive mice proliferated in response to HTLV-I-infected cells and retinal antigens. This cross-reactivity suggests a shared epitope recognized by CD4+ T cells.
Area of Science:
- Immunology
- Virology
- Ophthalmology
Context:
- Human T-lymphotropic virus type I (HTLV-I) infection is linked to various diseases.
- Retinal antigens can trigger immune responses.
- Understanding cross-reactivity between viral and self-antigens is crucial for autoimmune disease research.
Purpose:
- To investigate the immune response of murine spleen cells to HTLV-I-infected cell lines and retinal antigens.
- To determine the phenotype of responding T cells and the mechanisms involved in antigen recognition.
Summary:
- Immune, but not naive, B10.BR murine spleen cells exhibited antigen-induced proliferation against HTLV-I-infected cell lines and retinal antigens from various species.
- The responding cells were identified as Thy-1.2+, CD4+, and CD8- T cells.
- Proliferation was inhibited by antibodies targeting CD3, CD4, and MHC class II (I-AK), indicating a CD4+ T cell-mediated response involving cross-reactivity between HTLV-I and retinal epitopes.
Impact:
- These findings suggest a potential cross-reactive epitope between HTLV-I-infected cells and retinal antigens, recognized by CD4+ T cells.
- This cross-reactivity may have implications for understanding HTLV-I-associated uveitis or other autoimmune conditions affecting the eye.
- Further research could explore the specific molecular basis of this epitope sharing and its role in disease pathogenesis.