Classical MHCI molecules regulate retinogeniculate refinement and limit ocular dominance plasticity.
Classical MHCI molecules regulate retinogeniculate refinement and limit ocular dominance plasticity.
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DOI:
10.1016/j.neuron.2009.10.015
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发表时间:
2009-11-25
期刊:
影响因子:
16.2
通讯作者:
Shatz, Carla J.
中科院分区:
文献类型:
--
作者:
Datwani, Akash;McConnell, Michael J.;Kanold, Patrick O.;Micheva, Kristina D.;Busse, Brad;Shamloo, Mehrdad;Smith, Stephen J.;Shatz, Carla J.
Major histocompatibility complex Class I (MHCI) genes were discovered unexpectedly in healthy CNS neurons in a screen for genes regulated by neural activity. In mice lacking just 2 of the 50+ MHCI genes H2-Kb and H2-Db, ocular dominance (OD) plasticity is enhanced. Mice lacking PirB, an MHCI receptor, have a similar phenotype. H2-Kb and H2-Db are expressed not only in visual cortex, but also in lateral geniculate nucleus (LGN) where protein localization correlates strongly with synaptic markers and complement protein C1q. In KbDb-/- mice developmental refinement of retinogeniculate projections is impaired, similar to C1q-/- mice. These phenotypes in KbDb-/- mice are strikingly similar to those in β2m-/-TAP1-/- mice, which lack cell surface expression of all MHCIs, implying that H2-Kb and H2-Db can account for observed changes in synapse plasticity. H2-Kb and H2-Db ligands, signaling via neuronal MHCI receptors, may enable activity-dependent remodeling of brain circuits during developmental critical periods.
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