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Optimization of Prodiginines as Single-Dose Curative Antimalarials.

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  • 1Department of Chemistry, Portland State University, Portland, Oregon 97201, United States.

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|November 18, 2025
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Summary
This summary is machine-generated.

New prodiginine analogs were synthesized to combat drug-resistant malaria. Lead compound PG102 showed strong oral efficacy in mouse models and activity against resistant malaria strains with low toxicity.

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Area of Science:

  • Medicinal Chemistry
  • Parasitology
  • Drug Discovery

Background:

  • Drug-resistant malaria necessitates novel antimalarials with distinct mechanisms.
  • Existing treatments face challenges from emerging resistance.
  • Multistage activity and good tolerability are key requirements for new antimalarial drugs.

Purpose of the Study:

  • To design and synthesize novel prodiginine analogs as potential antimalarial agents.
  • To identify lead compounds with broad-stage activity and favorable safety profiles.
  • To address the urgent need for new antimalarials effective against resistant strains.

Main Methods:

  • Systematic modification of the B and C rings of the prodiginine scaffold.
  • Synthesis of 54 new prodiginine analogs.
  • In vivo efficacy testing in *Plasmodium yoelii* and *Plasmodium berghei* murine models.
  • In vitro testing against artemisinin-resistant *Plasmodium falciparum* strains.
  • Genotoxicity and cardiotoxicity profiling.

Main Results:

  • Lead compound PG102 (analog 6) demonstrated curative oral efficacy in erythrocytic malaria models.
  • PG102 provided protection against liver-stage infection and retained potency against resistant *P. falciparum*.
  • The compound exhibited a medium parasite-killing profile with low genotoxicity and cardiotoxicity potential.
  • First demonstration of robust single-dose antimalarial efficacy within the prodiginine class.

Conclusions:

  • PG102 is a promising lead compound for next-generation antimalarial drug development.
  • The prodiginine scaffold can be effectively modified to yield potent antimalarial agents.
  • Further development of PG102 warrants investigation due to its efficacy and safety profile.