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Substance P Activates Responses Correlated with Tumour Growth in Human Glioma Cell Lines Bearing Tachykinin NK1 Receptors

Overview
Journal Br J Cancer
Specialty Oncology
Date 1999 Jan 15
PMID 9888463
Citations 21
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Abstract

The neuropeptide substance P (SP), by stimulating tachykinin NK1 receptors (NK1R), triggers a number of biological responses in human glioma cells which are potentially relevant for tumour growth. First, radioligand binding studies demonstrated the presence of tachykinin NK1R on SNB-19, DBTRG-05 MG and U373 MG, but not on U138 MG and MOG-G-GCM human glioma cell lines. Second, application of SP or neurokinin A (NKA) to NK1R+ glioma cell lines increased the secretion of interleukin 6 (IL-6) and potentiated IL-6 secretion induced by IL-1beta. SP also up-regulated the release of transforming growth factor beta1 (TGF-beta1) by the U373 MG glioma cell line. Third, SP induced new DNA synthesis and enhanced the proliferation rate of NK1R+, but not of NK1R- glioma cell lines. Also, NKA stimulated the proliferation and cytokine secretion in NK1R+ glioma cell lines. All the stimulant effects of SP/NKA on NK1R+ glioma cell lines were completely blocked by a specific tachykinin NK1R antagonist, MEN 11467. These data support the potential use of tachykinin NK1R antagonist for controlling the proliferative rate of human gliomas.

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