Antiparasitic and Antimicrobial Indolizidines from the Leaves of Prosopis glandulosa var. glandulosa

作者:Rahman Aziz Abdur; Samoylenko Volodymyr; Jacob Melissa R; Sahu Rajnish; Jain Surendra K; Khan Shabana I; Tekwani Babu L; Muhammad Ilias*
来源:Planta Medica, 2011, 77(14): 1639-1643.
DOI:10.1055/s-0030-1270906

摘要

A new indolizidine alkaloid, named Delta(1,6)-juliprosopine (1), together with previously known indolizidine analogs (2-6), was isolated from the leaves of Prosopis glandulosa var. glandulosa, collected from Nevada, USA; while two other known indolizidines, juliprosopine (6) and juliprosine (7), were isolated from P. glandulosa leaves collected in Texas, USA. The structures of compound 1 and 7 were determined using a combination of NMR and MS techniques. Compound 7 exhibited potent antiplasmodial activity against Plasmodium falciparum D6 and W2 strains with IC(50) values of 170 and 150 ng/mL, respectively, while 1 was found to be less active (IC(50) values 560 and 600 ng/mL, respectively). Both compounds were devoid of VERO cells toxicity up to a concentration of 23800 ng/mL. The antileishmanial activity of indolizidines was evaluated against Leishmania donovani promastigotes, axenic amastigotes, and amastigotes in THP1 macrophage cultures. When tested against macrophage cultures, the tertiary bases (1, 3, 6) were found to be more potent than quaternary salts (2, 5, 7), displaying IC(50) values between 0.8-1.7 mu g/mL and 3.1-6.0 mu g/mL, respectively. In addition, compound 7 showed potent antifungal activity against Cryptococcus neoformans and antibacterial activity against Mycobacterium intracellulare, while 1 was potent only against C. neoformans and weakly active against other organisms.

  • 出版日期2011-9