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The effects of long acting somatostatin analog SMS 201-995 were examined in vivo on: 1) lymphoid morphostasis and functional reactivity of cells obtained from SMS treated donors, 2) on humoral, and 3) cellular type of immunity; and in vitro on: 1) blastic transformation of lymphocytes stimulated by activators of different transmembrane pathways (CD2 by PHA and CD3/TCR by anti-CD3 monoclonal antibody and by allogeneic cells) and 2) on growth and secretory activity of several hybridoma cell lines. The data have shown that SMS in vivo decreases the proportion of CD4+, CD5+ and Ig+ cells in spleen. The reactivity of these cells to Con A was suppressed, but their spontaneous blastic transformation was increased. SMS suppressed also the plaque forming cells generation and proliferation of cells in popliteal lymph nodes during the local host versus graft reaction. The former immunosuppression was abrogated with the use of growth hormone, while in the latter, the time dependent changes in spleen composition were also noticed. The data obtained in vitro revealed that SMS may inhibit only the CD2-induced blastogenesis (in early and late interval after the use of PHA). SMS inhibited also the spontaneous growth and/or secretion of antibodies in some hybridoma cell lines.
B Radosević-Stasić, and
Z Trobonjaca, and
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M Cuk, and
B Polić, and
D Rukavina
December 1991,
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B Radosević-Stasić, and
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D Rukavina
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B Radosević-Stasić, and
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D Rukavina
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B Radosević-Stasić, and
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