title: New manzamine alkaloids with potent activity against infectious diseases.
abstract: The isolation of the new enantiomers of 8-hydroxymanzamine A (1), manzamine F (2), along with the unprecedented manzamine dimer, neo-kauluamine from an undescribed genus of Indo-Pacific sponge (family Petrosiidae, order Haplosclerida) is reported. The relative stereochemistry of neo-kauluamine was established through detailed analysis of NOE-correlations combined with molecular modeling. The significance of the manzamines as in vivo antimalarial agents with superior activity to the clinically used drugs artemisinin and chloroquine is discussed along with the activity in vitro against the AIDS-opportunistic infectious diseases tuberculosis and toxoplasmosis. Reexamination of the sponges identified as Prianos, and Pachypellina, in earlier publications has confirmed that these are members of the same genus as the sponge described here, but differ at the species level.
authors.affiliation: Department of Pharmacognosy, NCDNP, University of Mississippi, University, MS, USA.
authors.forename: K A
authors.initials: KA
authors.lastname: El Sayed
authors.forename: M
authors.initials: M
authors.lastname: Kelly
authors.forename: U A
authors.initials: UA
authors.lastname: Kara
authors.forename: K K
authors.initials: KK
authors.lastname: Ang
authors.forename: I
authors.initials: I
authors.lastname: Katsuyama
authors.forename: D C
authors.initials: DC
authors.lastname: Dunbar
authors.forename: A A
authors.initials: AA
authors.lastname: Khan
authors.forename: M T
authors.initials: MT
authors.lastname: Hamann
mesh_terms: D000818:Animals; D000890:Anti-Infective Agents / Q000302:isolation & purification / Q000494:pharmacology* / Q000627:therapeutic use; D002227:Carbazoles; D002243:Carbolines / Q000302:isolation & purification* / Q000494:pharmacology* / Q000627:therapeutic use; D005260:Female; D006801:Humans; D020128:Inhibitory Concentration 50; D008288:Malaria / Q000188:drug therapy; D051379:Mice; D008958:Models, Molecular; D008968:Molecular Conformation; D011161:Porifera / Q000737:chemistry; D014123:Toxoplasmosis / Q000188:drug therapy; D014376:Tuberculosis / Q000188:drug therapy
chemical_list: D000890:Anti-Infective Agents; D002227:Carbazoles; D002243:Carbolines; C436389:manzamine F; C436388:neo-kauluamine; C086783:8-hydroxymanzamine A