What molecular mechanisms enable myelin-specific T cells to stimulate oligodendrogenesis while causing demyelination?

neuroinflammation open
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Description

The study shows myelin-specific T cells can promote oligodendrocyte formation, contradicting their established role in myelin destruction in MS. The mechanistic basis for this dual function remains unexplained and is critical for understanding MS pathogenesis.

Gap type: contradiction Source paper: Stimulation of adult oligodendrogenesis by myelin-specific T cells. (2011, The American journal of pathology, PMID:21872562)

Resolution criteria

Resolved when an evidence artifact resolves the mechanistic basis for myelin-specific T cell dual function (oligodendrogenesis versus demyelination) with one of: (1) single-cell RNA-seq of T cells infiltrating MS lesions or cuprizone demyelination models, identifying >=2 distinct myelin-specific T cell clonal lineages with differential cytokine profiles (Th1/Th17 versus regulatory IL-10-producing subtypes), linked to their oligodendrogenic versus destructive effects; (2) antigen specificity studies showing that myelin basic protein (MBP)-specific versus myelin oligodendrocyte glycoprotein (MOG)-specific T cells have opposing effects on oligodendrocyte precursor cell (OPC) differentiation in vitro, with ELISPOT or single-cell RNA-seq confirming cytokine profiles; (3) adoptive transfer experiments in cuprizone demyelination models demonstrating that IL-10-deficient myelin-specific T cells fail to promote oligodendrogenesis while WT T cells do (>=2-fold increase in CC1+ OLIG2+ oligodendrocytes), establishing IL-10 dependency. Quantitative threshold: n >= 6 animals per group, >=30% difference in OPC differentiation.

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