Abstract
Approximately 8% of CD9-, S100β- and SOX2-triple positive (CD9/S100β/SOX2-positive) stem/progenitor cells in the anterior lobe of the rat pituitary gland have previously been shown to differentiate into endothelial cells in vitro, suggesting that they play a role in vascularisation as tissue-resident vascular precursor cells. In the present study, we focused on chemokine ligands to further characterise the CD9/S100β/SOX2-positive cells and found that they distinctively express CX3C chemokine ligand 1 (Cx3cl1). Immunohistochemical analysis of the anterior lobe showed that CX3CL1-positive cells comprised 7.8% in CD9-positive cells. By cultivation of the CD9-positive cells on laminin-coated plates, we observed that the expression levels of Cx3cl1 decreased, while those of Sox18, an endothelial cell-progenitor marker, and Cx3cr1, a CX3CL1 receptor, increased. Furthermore, in a rat model of prolactinoma, the most common pituitary tumour, which is accompanied by frequent neo-vasculogenesis in the anterior lobe, we have confirmed a decrease in Cx3cl1 expression and an increase in Cx3cr1 expression, as well as a prominent increase in Sox18 expression. These findings suggest that CX3CL1/CX3CR1 signalling in CD9/S100β/SOX2-positive cells...Continue Reading
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Jun 6, 2020·Histochemistry and Cell Biology·Douglas J Taatjes, Jürgen Roth
Sep 29, 2020·Frontiers in Medicine·Beatrice AraminiAntonino Maiorana
Nov 23, 2020·Histochemistry and Cell Biology·Kotaro HoriguchiShunji Ohsako
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