Theonella sp is a source of biologically-active 3-alkylpyridine alkaloids (3-APAs) that have shown potential as antimalarial agents.
Two new 3-APA analogues, designed with the thiocyanate group, were synthesized and tested against Plasmodium falciparum, revealing good antimalarial activity but high cytotoxicity towards human cells.
Further testing on human cancer cell lines showed one compound had selective toxicity, inducing chromosomal mis-segregation and triggering apoptosis, suggesting its potential as an anticancer agent.