Distribution of DHPS Mutations Among ITS Subtypes of P. carinii

نویسندگان

  • STEVEN R. MESHNICK
  • PAUL A. HOSSLER
  • KYLE S. ENGER
  • DAVID MINDELL
  • CHAO H. LEE
  • L. F. NIMRI
  • JANE L. CARTER
  • BENJAMIN BEARD
  • CARLOS DEL RIO
  • LAURENCE HUANG
چکیده

Sulfa drugs are widely used in the prophylaxis and treatment of Pneumocystis carinii pneumonia. Co-trimoxasole, the first-line agent, is a combination of sulfamethoxazole plus trimethoprim but functions as sulfa monotherapy since trimethoprim appears to be inactive. Dapsone, a sulfone, is a commonly used second line agent. Both sulfamethoxazole and dapsone act by binding to the dihydropteroate synthase (DHPS) (reviewed in ref [2, 16] (Fig. 1).

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منابع مشابه

Distribution of DHPS mutations among ITS subtypes of P. carinii f. sp. hominis.

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Genetic analysis of multiple loci suggests that mutations in the Pneumocystis carinii f. sp. hominis dihydropteroate synthase gene arose independently in multiple strains.

To determine if mutations in the dihydropteroate synthase (DHPS) gene of Pneumocystis carinii f. sp. hominis arose in a single strain that was subsequently widely disseminated, we examined four genomic regions of 22 P. carinii clinical isolates selected based on the absence or presence of mutations in the DHPS gene. By single-strand conformation polymorphism and DNA sequencing, we found varying...

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تاریخ انتشار 2003