Abstract:
:Sphingosine-1-phosphate receptor 1 (S1P(1)), a receptor for sphingosine-1-phosphate, has been shown to play an important role in the migration, proliferation, and survival of several types of cell including endothelial cells. Given that S1P(1) signaling could serve as a therapeutic target, we evaluate the expression of S1P(1) in formalin-fixed and paraffin-embedded sections from human tissues, using automated immunostainers (Ventana). The specificity of the polyclonal rabbit anti-human S1P(1) antibody used in this study was defined by immunostaining of the vasculature in S1P ( 1 ) ( -/- ) and S1P ( 1 ) ( +/- ) mouse embryos. The antibody stained the newly formed vasculatures ex vivo in a serum-free matrix culture model using rat aortic rings. In human specimens, S1P(1) was strongly expressed on the cell surface membrane of endothelial cells of blood and lymphatic vessels in all tissues examined. The expression of S1P(1) was confirmed by the flow cytometric analysis and real time RT-PCR of an angiosarcoma cell line. This study indicates that S1P(1) can be used as an immunohistochemical marker for human tissue endothelial cells.
journal_name
J Mol Histoljournal_title
Journal of molecular histologyauthors
Akiyama T,Sadahira Y,Matsubara K,Mori M,Igarashi Ydoi
10.1007/s10735-008-9193-ysubject
Has Abstractpub_date
2008-10-01 00:00:00pages
527-33issue
5eissn
1567-2379issn
1567-2387journal_volume
39pub_type
杂志文章abstract::Under normal homeostasis, melanocyte growth and behaviour is tightly controlled by the surrounding keratinocytes. Keratinocytes regulate melanocyte behaviour through a complex system of paracrine growth factors and cell-cell adhesion molecules. Pathological changes, leading to development of malignant melanoma, upset ...
journal_title:Journal of molecular histology
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