Pyrrolizidine alkaloids and pentacyclic triterpene saponins in the defensive secretions of Platyphora leaf beetles

Chemoecology ◽  
2001 ◽  
Vol 11 (3) ◽  
pp. 113-120 ◽  
Author(s):  
Jacques M. Pasteels ◽  
Arnaud Termonia ◽  
Donald M. Windsor ◽  
Ludger Witte ◽  
Claudine Theuring ◽  
...  
Keyword(s):  
Pyrrolizidine Alkaloids ◽  
Triterpene Saponins ◽  
Defensive Secretions ◽  
Pentacyclic Triterpene ◽  
Leaf Beetles

scholarly journals Two New Pentacyclic Triterpene Saponins from the Leaves of Akebia trifoliata

Molecules ◽  
2016 ◽  
Vol 21 (7) ◽  
pp. 962 ◽  
Author(s):  
Qiao-Lin Xu ◽  
Jing Wang ◽  
Li-Mei Dong ◽  
Qiang Zhang ◽  
Bi Luo ◽  
...  
Keyword(s):  
Triterpene Saponins ◽  
Pentacyclic Triterpene

New pentacyclic triterpene saponins with strong anti-leishmanial activity from the leaves of Maesa balansae

Tetrahedron ◽  
2004 ◽  
Vol 60 (1) ◽  
pp. 219-228 ◽  
Author(s):  
Nils Germonprez ◽  
Luc Van Puyvelde ◽  
Louis Maes ◽  
Mai Van Tri ◽  
Norbert De Kimpe
Keyword(s):  
Triterpene Saponins ◽  
Pentacyclic Triterpene

Biosynthesis of iridoid monoterpenes in insects: Defensive secretions from larvae of leaf beetles (coleoptera: chrysomelidae).

Tetrahedron ◽  
1994 ◽  
Vol 50 (23) ◽  
pp. 6859-6874 ◽  
Author(s):  
Martin Veith ◽  
Michael Lorenz ◽  
Wilhelm Boland ◽  
Helmut Simon ◽  
Konrad Dettner
Keyword(s):  
Defensive Secretions ◽  
Leaf Beetles

scholarly journals Detoxification of pyrrolizidine alkaloids by the harvestman Mitopus morio (Phalangidae) a predator of alkaloid defended leaf beetles

Chemoecology ◽  
2003 ◽  
Vol 13 (3) ◽  
pp. 123-127 ◽  
Author(s):  
Thomas Hartmann ◽  
H�kan H�ggstr�m ◽  
Claudine Theuring ◽  
Rainer Lindigkeit ◽  
Martine Rahier
Keyword(s):  
Pyrrolizidine Alkaloids ◽  
Leaf Beetles

scholarly journals Selective sequestration and metabolism of plant derived pyrrolizidine alkaloids by chrysomelid leaf beetles

1997 ◽  
Vol 45 (3) ◽  
pp. 489-497 ◽  
Author(s):  
Thomas Hartmann ◽  
Ludger Witte ◽  
Adelheid Ehmke ◽  
Claudine Theuring ◽  
Martine Rowell-Rahier ◽  
...  
Keyword(s):  
Pyrrolizidine Alkaloids ◽  
Leaf Beetles

scholarly journals Review of Constituents and Biological Activities of Triterpene Saponins from Glycyrrhizae Radix et Rhizoma and Its Solubilization Characteristics

Molecules ◽  
2020 ◽  
Vol 25 (17) ◽  
pp. 3904
Author(s):  
Feifei Li ◽  
Bin Liu ◽  
Tong Li ◽  
Qianwen Wu ◽  
Zhiyong Xu ◽  
...  
Keyword(s):  
Biological Activities ◽  
Herbal Medicines ◽  
Water Soluble ◽  
Triterpene Saponins ◽  
Pentacyclic Triterpene ◽  
Sugar Chain ◽  
Factors Affecting ◽  
Glycyrrhizae Radix ◽  
Chemical Structures ◽  
Development And Utilization

Glycyrrhizae Radix et Rhizoma is regarded as one of the most popular and commonly used herbal medicines and has been used in traditional Chinese medicine (TCM) prescriptions for over 2000 years. Pentacyclic triterpene saponins are common secondary metabolites in these plants, which are synthesized via the isoprenoid pathway to produce a hydrophobic triterpenoid aglycone containing a hydrophilic sugar chain. This paper systematically summarizes the chemical structures of triterpene saponins in Glycyrrhizae Radix et Rhizoma and reviews and updates their main biological activities studies. Furthermore, the solubilization characteristics, influences, and mechanisms of Glycyrrhizae Radix et Rhizoma are elaborated. Solubilization of the triterpene saponins from Glycyrrhizae Radix et Rhizoma occurs because they contain the nonpolar sapogenin and water-soluble sidechain. The possible factors affecting the solubilization of Glycyrrhizae Radix et Rhizoma are mainly other crude drugs and the pH of the decoction. Triterpene saponins represented by glycyrrhizin from Glycyrrhizae Radix et Rhizoma characteristically form micelles due to amphiphilicity, which makes solubilization possible. This overview provides guidance regarding a better understanding of GlycyrrhizaeRadix et Rhizoma and its TCM compatibility, alongside a theoretical basis for the further development and utilization of Glycyrrhizae Radix et Rhizoma.

scholarly journals Sequestration of plant pyrrolizidine alkaloids by chrysomelid beetles and selective transfer into the defensive secretions

Chemoecology ◽  
1991 ◽  
Vol 2 (1) ◽  
pp. 41-48 ◽  
Author(s):  
Martine Rowell-Rahier ◽  
Ludger Witte ◽  
Adelheid Ehmke ◽  
Thomas Hartmann ◽  
Jacques M. Pasteels
Keyword(s):  
Pyrrolizidine Alkaloids ◽  
Selective Transfer ◽  
Defensive Secretions ◽  
Chrysomelid Beetles
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