Activities of DL-alpha-difluoromethylarginine and polyamine analogues against Cryptosporidium parvum infection in a T-cell receptor alpha-deficient mouse model

作者：Yarlett Nigel^*; Waters W Ray; Harp James A; Wannemuehler Michael J; Morada Mary; Bellcastro Josephine; Upton Steve J; Marton Laurence J; Frydman Benjamin J

来源：Antimicrobial Agents and Chemotherapy, 2007, 51(4): 1234-1239.

DOI：10.1128/AAC.01040-06

The in vivo effectiveness of a series of conformationally restricted polyamine analogues alone and selected members in combination with DL-alpha-difluoromethylarginine against Cryptosporidium parvum infection in a T-cell receptor alpha-deficient mouse model was tested. Polyamine analogues were selected from the extended his (ethyl)-sym-homospermidine or his (ethyl)-spermine backbone having cis or trans double bonds at the center of the molecule. The cis isomers were found to have significantly greater efficacy in both preventing and curing infection in a mouse model than the trans polyamine analogues when tested in a T-cell receptor alpha-deficient mouse model. When tested in combination with DL-alpha-difluoromethylarginine, the cis-restricted analogues were found to be more effective in preventing oocyst shedding. This study demonstrates the potential of pollyamine analogues as anticryptosporidial agents and highlights the presence of multiple points in polyamine synthesis by this parasite that are susceptible to inhibition resulting in growth inhibition.

• 出版日期2007-4