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A brain region-specific neural pathway regulating germinal matrix angiogenesis #MMPMID28535372
Ma S; Santhosh D; Peeyush Kumar T; Huang Z
Dev Cell 2017[May]; 41 (4): 366-381.e4 PMID28535372show ga
Intimate communication between neural and vascular cells is critical for normal brain development and function. Germinal matrix (GM), a key primordium for the brain reward circuitry, is unique among brain regions for its distinct pace of angiogenesis and selective vulnerability to hemorrhage during development. A major neonatal condition, GM hemorrhage can lead to cerebral palsy, hydrocephalus, and mental retardation. Here we identify a brain region-specific neural progenitor-based signaling pathway dedicated to regulating GM vessel development. This pathway consists of cell surface sphingosine-1-phosphate receptors, an intracellular cascade including G? co-factor Ric8a and p38 MAPK, and target gene integrin ?8, which in turn regulates vascular TGF? signaling. These findings provide novel insights into region-specific specialization of neurovascular communication, with special implications for deciphering potent early-life endocrine as well as potential gut microbiota impacts on brain reward circuitry. They also identify tissue-specific molecular targets for GM hemorrhage intervention.