163 research outputs found
Sur les caractÚres minéralogiques et stratigraphiques des roches dites plutoniennes de la Belgique et de l'Ardenne française
Mode of access: Internet
Neurohypophysial Receptor Gene Expression by Thymic T Cell Subsets and Thymic T Cell Lymphoma Cell Lines
Abstract
Neurohypophysial oxytocin (OT) and vasopressin (VP) genes are
transcribed in thymic epithelium, while immature T lymphocytes express
functional neurohypophysial receptors. Neurohypophysial receptors belong
to the G protein-linked seven-transmembrane receptor superfamily and are encoded
by four distinct genes, OTR, V1R, V2R
and V3R. The objective of this study was to
identify the nature of neurohypophysial receptor in thymic T cell subsets purified by
immunomagnetic selection, as well as in murine thymic lymphoma cell lines RL12-NP
and BW5147. OTR is transcribed in all thymic T cell subsets and T cell lines, while
V3R transcription is restricted to CD4+ CD8+ and CD8+ thymic cells. Neither V1R nor
V2R transcripts are detected in any kind of T cells. The OTR protein was identified by
immunocytochemistry on thymocytes freshly isolated from C57BL/6 mice. In murine fetal
thymic organ cultures, a specific OTR antagonist does not modify the percentage of T
cell subsets, but increases late T cell apoptosis further evidencing the involvement of
OT/OTR signaling in the control of T cell proliferation and survival. According to these
data, OTR and V3R are differentially expressed during T cell ontogeny. Moreover, the
restriction of OTR transcription to T cell lines derived from thymic lymphomas may be
important in the context of T cell leukemia pathogenesis and treatment
The Minimal Supersymmetric Standard Model: Group Summary Report
CONTENTS: 1. Synopsis, 2. The MSSM Spectrum, 3. The Physical Parameters, 4.
Higgs Boson Production and Decays, 5. SUSY Particle Production and Decays, 6.
Experimental Bounds on SUSY Particle Masses, 7. References.Comment: 121 pages, latex + epsfig, graphicx, axodraw, Report of the MSSM
working group for the Workshop "GDR-Supersym\'etrie",France. Rep. PM/98-4
Rapport du jury chargé de décerner, en 1897, le prix décennal des sciences minérales (période de 1892-1897)
Resolved Photon Contributions to Leptoquark Production in and Collision
We calculate the resolved photon contribution to leptoquark production at
colliders for the center of mass energies ~GeV and
1~TeV. We also calculate the resolved photon contribution to leptoquark
production at colliders for the center of mass energies ~and~2~TeV. In both cases we find that these contributions are considerably
larger than the standard contributions considered in the literature.Comment: 9 pages (5 postscript figures in separate uuencoded file), OCIP/C
93-1
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