Key result
Human anti-nRNP autoantibodies prevent U1-C dissociation from U1 snRNP by stabilizing the Sm core interaction.
Why the study?
The autoimmune response to U1 snRNPs involves all components but not all are recognized equally, and the role of autoantibodies in stabilizing U1-C interaction with Sm core proteins was unclear.
Population
Human anti-nuclear ribonucleoprotein antigen autoimmune sera and MRL/lpr mice sera
Comparison
Dissociation of U1 snRNPs before versus after antibody binding
Design
Preclinical study using biochemical dissociation and immunoprecipitation assays
Authors
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Human anti-nRNP stabilization of U1 snRNP may influence antigen processing; leaves open mechanistic relevance to human SLE versus murine models.
Human anti-nRNP autoimmune sera contain autoantibodies that stabilize the interaction of U1-C with the Sm core particle, potentially influencing antigen processing and autoimmunity development.
Satoh et al. (1997) studied Autoimmunity. Human anti-nRNP sera vs. MRL/lpr mice sera and human anti-Sm sera was evaluated on Autoantibody recognition and stabilization of native U1 snRNPs. Human anti-nRNP sera contain autoantibodies that prevent dissociation of U1-C from the U1 snRNP by stabilizing its interaction with the Sm core particle, unlike sera from MRL/lpr mice.
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