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- W2079588825 abstract "In the adult bone marrow (BM), immune cells are replenished through the process of definitive hematopoiesis, which is regulated by a complex process of cellular and humoral interactions. The latter include substance P (SP), a neurotransmitter that is produced by neural and nonneural cells. Neurokinin-1 (NK-1), the high-affinity SP receptor, shares structural similarity with fibronectin, a component of the BM extracellular matrix proteins. This study examines how such similarity could alter the effects of SP on the proliferation of the immature BM progenitors. In vitro studies show that 1 ng fibronectin/mL enhanced the stimulatory effect of SP on the proliferation of primitive BM progenitors. This finding was studied by computational studies: proteomics and three-dimensional molecular modeling. Use of surface-enhanced laser desorption/ionization ProteinChip ® technology showed that despite the induction of neutral endopeptidase, exogenous fibronectin hindered the degradation of SP to SP(14). These findings support a protective role for fibronectin in the digestion of SP. Since SP(14) is a negative regulator of hematopoiesis, this report indicates that the structural similarity between fibronectin and NK-1 could be important for maintaining hematopoietic stimulation. These studies could be extrapolated to hematological disorders that are associated with SPfibronectin complexes.Key words: substance P, fibronectin, stem cell, neuropeptide, bone marrow." @default.
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- W2079588825 date "2002-05-01" @default.
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- W2079588825 title "Structural similarity between the bone marrow extracellular matrix protein and neurokinin 1 could be the limiting factor in the hematopoietic effects of substance P" @default.
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- W2079588825 doi "https://doi.org/10.1139/y02-039" @default.
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