20068-96-6Relevant articles and documents
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Kupchan,O'Brien
, p. 915 (1973)
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BIOSYNTHESIS OF THALICARPINE IN THALICTRUM MINUS
Sidjimov, Atanas K.,Marekov, Nikolay L.
, p. 871 - 874 (1982)
Feeding experiments with 14C-labelled reticuline, protosinomenine, orientaline, their N-nor-analogues and 3H-labelled isoboldine have shown reticuline and isoboldine to be the most efficient precursors of thalicarpine in Thalictrum minus.A biosynthetic pathway for thalicarpine with reticuline and isoboldine at the benzylisoquinoline and aporphine stages respectively has been suggested.Support for this proposal has been provided by the demonstration by radioisotopic dilution that reticuline and isoboldine are minor constituents of the plant.Key Word Index - Thalictrum minus; Ranuncula ceae; biosynthesis; alkaloids; thalicarpine; reticuline; isoboldine.
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Shamma,Slusarchyk
, p. 1509,1511 (1965)
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Thaliporphine increases survival rate and attenuates multiple organ injury in LPS-induced endotoxaemia
Chiao, Chin-Wei,Lee, Shoei-Sheng,Wu, Chin-Chen,Su, Ming-Jai
, p. 34 - 43 (2005)
This study addressed the question of whether thaliporphine, a phenolic aporphine alkaloid obtained from Chinese herbs and possessing antioxidant and α-1 adrenoceptor antagonistic activity, has protective effects in endotoxaemic rats and we attempted to elucidate the mechanisms contributing to such protective effects. Injection of rats with endotoxin (E. coli lipopolysaccharide, LPS) induced severe hypotension and tachycardia as well as vascular hyporeactivity to noradrenaline. Pretreatment of LPS-treated rats with thaliporphine attenuated the delayed hypotension significantly whilst only a higher dose (1 mg/kg) of thaliporphine decreased LPS-induced tachycardia. LPS significantly increased nitric oxide (NO.) and superoxide anion (O2-.) levels, a response that was reduced by pretreatment with 1 mg/kg thaliporphine. Endotoxaemia for 240 min resulted in a bell-shaped time course for the change of serum tumour necrosis factor-α (TNF-α) level with a peak at 60 min. Pretreatment of LPS-treated rats with 1 mg/kg thaliporphine significantly reduced the serum TNF-α level at 60 min. In addition, LPS caused a biphasic change in blood glucose and thaliporphine attenuated the late-phase decrease in blood glucose. Endotoxaemia induced multiple organ injury in the liver, kidney and heart, as indicated by increases of aspartate aminotransferase (GOT), alanine aminotransferase (GPT), creatinine (CRE), lactate dehydrogenase (LDH) and creatine phosphate kinase muscle-brain (CKMB) levels in serum. These increases of biochemical markers and inflammatory cell infiltration into injured tissues were reduced significantly by treatment with thaliporphine. In addition, thaliporphine increased the survival rate of LPS-treated mice dose-dependently. In conclusion, our results suggest that thaliporphine could be a novel agent for attenuating endotoxin-induced circulatory failure and multiple organ injury and may increase the survival rate. These beneficial effects of thaliporphine may be attributed to the suppression of TNF-α, NO. and O2-. production. Springer-Verlag 2005.
LIPASE-CATALYZED RESOLUTION OF ACETATES OF RACEMIC PHENOLIC APORPHINES AND HOMOAPORPHINES IN ORGANIC SOLVENT
Hoshino, Osamu,Fuchino, Hiroyuki,Kikuchi, Masafumi
, p. 553 - 560 (2007/10/02)
Enzymatic resolution of (+/-)-1-acetoxy-2,9,10-trimethoxyaporphine (O-acetylthaliporphine) (3), (+/-)-2-acetoxy-1,9,10-trimethoxyaporphine (O-acetylpredicentrine) (4), and (+/-)-3-acetoxy-2,9,10-trimethoxyaporphines (5) by use of immobilized lipase in organic solvent gave resolved 3-5 and the corresponding hydroxyaporphines (9-11) in fair to good chemical and optical yields.Analogous reaction of (+/-)-1-acetoxy-2,10,11-trimethoxyhomoaporphine (6) did not take place, whereas that of (+/-)-2-acetoxy-1,10,11-trimethoxy- and (+/-)-3-acetoxy-1,10,11-trimethoxyhomoaporhines (7 and 8) produced optical active 7, 8 and hydroxyhomoaporphines (13,14).
