Related Experiment Videos
X-linked lymphoproliferative disease: a progressive immunodeficiency.
1Division of Immunology, RE-204, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Ave, Boston, Massachusetts 02215, USA.
Annual Review of Immunology
|March 13, 2001
Summary
X-linked lymphoproliferative syndrome (XLP) research reveals the SAP/SH2D1A gene regulates SLAM family signaling. This gene is crucial for T cell and APC interactions during viral infections, independent of EBV infection.
Area of Science:
- Immunology
- Molecular Biology
- Genetics
Background:
- X-linked lymphoproliferative syndrome (XLP) is a primary immunodeficiency.
- Recent advances include cloning the SAP/SH2D1A gene and solving its protein structure.
Purpose of the Study:
- To elucidate the molecular mechanisms underlying XLP.
- To identify the function of the SAP/SH2D1A protein and its interaction partners.
Main Methods:
- Gene cloning and protein structure determination.
- Identification of molecular targets (SLAM family receptors, adapter proteins).
- Analysis of missense mutations in XLP patients and gene-disrupted mouse models.
Main Results:
- SAP/SH2D1A protein identified as a natural inhibitor of SLAM family receptor interactions.
- Dysgammaglobulinemia and B cell lymphoma can develop in XLP patients without EBV infection.
- EBV infection is not essential for XLP phenotype development in mouse models.
Conclusions:
- The SAP/SH2D1A gene plays a fundamental role in controlling SLAM family signaling.
- This signaling is critical for T cell and antigen-presenting cell (APC) interactions during viral infections.
- XLP pathogenesis may involve SAP/SH2D1A's role in immune cell communication, irrespective of EBV status.