doi: 10.1111/j.1749-6632.1975.tb29079.x.
Regulation of theta-antigen expression by agents altering cyclic AMP level and by thymic factor
- PMID: 165766
- DOI: 10.1111/j.1749-6632.1975.tb29079.x
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Regulation of theta-antigen expression by agents altering cyclic AMP level and by thymic factor
Ann N Y Acad Sci.
.
Abstract
Thymic factor, cyclic AMP, and products increasing its cellular level, such as Prostaglandin E1, induce the appearance of the theta-antigen on T-cell precursors whether assessed by a rossette-inhibition assay or a cytotoxic assay after cell fractionation on BSA discontinuous gradiet. Synergism has been demonstrated between cyclic AMPT and TF for that effect. Conversely, decrease of theta expression has been obtained by altering cyclic AMP level in theta-positive cells either increasing it by dibutyryl cAMP treatment or decreasing it by indomethacin treatment. Finally, these data suggest the involvement of cyclic AMP in the regulation of theta expression under thymic hormone control.
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