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Salmonella enterica Serovar Typhimurium Requires Nonsterol Precursors of the Cholesterol Biosynthetic Pathway for Intracellular Proliferation

Departments of Pathology and Microbiology-Immunology,¹ Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, Illinois 60611,³ Department of Pathology, Rush-Presbyterian-St. Luke's Medical Center, Chicago, Illinois 60612,² Department of Microbiology, University of Iowa School of Medicine, Iowa City, Iowa 52242⁴

Received 4 August 2003/ Returned for modification 15 October 2003/ Accepted 3 November 2003

We have previously shown that Salmonella enterica serovar Typhimurium infection perturbs the host cholesterol biosynthetic pathway. Here we show that inhibiting the first step of this pathway (3-hydroxy-3-methylglutaryl coenzyme A reductase) reduces the growth of intracellular S. enterica serovar Typhimurium and has no effect on extracellular bacterial growth. Selectively inhibiting synthesis of downstream sterol components has no effect on infection, suggesting that the effect of statins on host nonsterol intermediates is detrimental to bacterial growth. Furthermore, statins also reduce bacterial proliferation in the S. enterica serovar Typhimurium mouse model. This suggests that blocking the production of nonsterol precursors in the host cell can be used to reduce infection.

Editor: J. T. Barbieri

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