Chloroquine commonly induces hormetic dose responses

Edward J. Calabrese*, Jaap C. Hanekamp, Yannic N. Hanekamp, Rachna Kapoor, Gaurav Dhawan, Evgenios Agathokleous

*Corresponding author for this work

Research output: Contribution to journalLetterAcademicpeer-review

3 Citations (Scopus)
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Abstract

The use of chloroquine in the treatment of COVID-19 has received considerable attention. The recent intense focus on this application of chloroquine stimulated an investigation into the effects of chloroquine at low doses on highly biologically-diverse models and whether it may induce hormetic-biphasic dose response effects. The assessment revealed that hormetic effects have been commonly induced by chloroquine, affecting numerous cell types, including tumor cell lines (e.g. human breast and colon) and non-tumor cell lines, enhancing viral replication, spermmotility, various behavioral endpoints aswell as decreasing risks of convulsions, and enhancing a spectrum of neuroprotective responses within a preconditioning experimental framework. These diverse and complex findings indicate that hormetic dose responses commonly occur with chloroquine treatment with a range of biologicalmodels and endpoints. These findings have implications concerning study design features including the number and spacing of doses, and suggest a range of possible clinical concerns and opportunities depending on the endpoint considered. (C) 2020 Elsevier B.V. All rights reserved.

Original languageEnglish
Article number142436
Number of pages8
JournalScience of the Total Environment
Volume755
DOIs
Publication statusPublished - 10-Feb-2021

Keywords

  • Chloroquine
  • Hydroxychloroquine
  • Hormesis
  • Dose-response
  • COVID-19
  • Biphasic dose response
  • ENHANCES REPLICATION
  • HORMESIS DATABASE
  • INDUCED PRURITUS
  • VIRUS
  • CELLS
  • MECHANISM
  • CORONAVIRUS
  • INHIBITION
  • INTERFERON
  • MOTILITY

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