6,19-Sulfur-Bridged Progesterone Analogues with Antiimmunosuppressive Activity
摘要:
Sulfur-bridged pregnanes 6,19-epithioprogesterone, 21-hydroxy-6,19-epithioprogesterone, and the corresponding sulfoxides and sulfones were synthesized and tested as blockers of the immunosuppresive activity of dexamethasone in rat thymocytes. A new one-pot procedure is described for the preparation of 6,19-epithioprogesterone and related compounds by iodocyclization of a 19-sulfanylpregn-5-ene. Antiimmunosuppresive activity was evaluated by the ability of the different steroids to block dexamethasone-inediated apoptosis in thymocytes and dexamethasone-mediated inhibition of the NF kappa-B transcription factor activity. DNA fragmentation and annexin V-FITC positive cells were taken as parameters of apoptosis whereas NF kappa-B activity was tested by the expression of the reporter vector kappa B-luciferase by TNF-alpha in Hela cells. 21-Hydroxy-6,19-epithioprogesterone S,S-dioxide-had improved activity in both parameters, while 21-hydroxy-6,19-epithioprogesterone had improved activity only in blocking dexamethasone-induced programmed cell death.
6,19-Sulfur-Bridged Progesterone Analogues with Antiimmunosuppressive Activity
摘要:
Sulfur-bridged pregnanes 6,19-epithioprogesterone, 21-hydroxy-6,19-epithioprogesterone, and the corresponding sulfoxides and sulfones were synthesized and tested as blockers of the immunosuppresive activity of dexamethasone in rat thymocytes. A new one-pot procedure is described for the preparation of 6,19-epithioprogesterone and related compounds by iodocyclization of a 19-sulfanylpregn-5-ene. Antiimmunosuppresive activity was evaluated by the ability of the different steroids to block dexamethasone-inediated apoptosis in thymocytes and dexamethasone-mediated inhibition of the NF kappa-B transcription factor activity. DNA fragmentation and annexin V-FITC positive cells were taken as parameters of apoptosis whereas NF kappa-B activity was tested by the expression of the reporter vector kappa B-luciferase by TNF-alpha in Hela cells. 21-Hydroxy-6,19-epithioprogesterone S,S-dioxide-had improved activity in both parameters, while 21-hydroxy-6,19-epithioprogesterone had improved activity only in blocking dexamethasone-induced programmed cell death.
6,19-Sulfur-Bridged Progesterone Analogues with Antiimmunosuppressive Activity
作者:Adriana S. Veleiro、Adali Pecci、María C. Monteserín、Ricardo Baggio、María T. Garland、Carlos P. Lantos、Gerardo Burton
DOI:10.1021/jm049266x
日期:2005.9.1
Sulfur-bridged pregnanes 6,19-epithioprogesterone, 21-hydroxy-6,19-epithioprogesterone, and the corresponding sulfoxides and sulfones were synthesized and tested as blockers of the immunosuppresive activity of dexamethasone in rat thymocytes. A new one-pot procedure is described for the preparation of 6,19-epithioprogesterone and related compounds by iodocyclization of a 19-sulfanylpregn-5-ene. Antiimmunosuppresive activity was evaluated by the ability of the different steroids to block dexamethasone-inediated apoptosis in thymocytes and dexamethasone-mediated inhibition of the NF kappa-B transcription factor activity. DNA fragmentation and annexin V-FITC positive cells were taken as parameters of apoptosis whereas NF kappa-B activity was tested by the expression of the reporter vector kappa B-luciferase by TNF-alpha in Hela cells. 21-Hydroxy-6,19-epithioprogesterone S,S-dioxide-had improved activity in both parameters, while 21-hydroxy-6,19-epithioprogesterone had improved activity only in blocking dexamethasone-induced programmed cell death.