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Toxoplasmosis01:28

Toxoplasmosis

Toxoplasmosis, a zoonotic disease caused by the protozoan Toxoplasma gondii, poses significant public health challenges globally due to its high seroprevalence and varied clinical manifestations. As an obligate intracellular parasite, T. gondii can infect all warm-blooded vertebrates, but felids are its only definitive hosts, shedding unsporulated oocysts into the environment. Humans typically acquire the infection through ingestion of tissue cysts in undercooked meat or oocysts from...

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Related Experiment Video

Updated: Jun 27, 2026

Quantification of the Immunosuppressant Tacrolimus on Dried Blood Spots Using LC-MS/MS
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Beyond Rejection: Exploring Tacrolimus's Hidden Potential in Toxoplasmosis.

Benjamin R Johnson1, Anna K Potter2

  • 1Emergency Medicine, Nova Southeastern University Dr. Kiran C. Patel College of Osteopathic Medicine, Clearwater, USA.

Cureus
|October 8, 2025
PubMed
Summary

Tacrolimus, an immunosuppressant, may treat toxoplasmosis. Research suggests calcineurin inhibitors like tacrolimus could combat the parasite Toxoplasma gondii, especially in immunocompromised patients.

Keywords:
antiparasiticcalcineurin inhibitorscyclosporin atacrolimustoxoplasma gondiitoxoplasmosis

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Area of Science:

  • Immunology
  • Parasitology
  • Pharmacology

Background:

  • Toxoplasmosis, caused by *Toxoplasma gondii*, is a significant threat to immunocompromised individuals, including transplant recipients.
  • Calcineurin inhibitors like tacrolimus are crucial immunosuppressants in transplant medicine.
  • Cyclosporine, a similar calcineurin inhibitor, demonstrates antiparasitic activity against protozoan parasites.

Purpose of the Study:

  • To evaluate the potential antiparasitic activity of tacrolimus against *Toxoplasma gondii*.
  • To explore tacrolimus as a treatment option for toxoplasmosis, particularly in vulnerable populations.
  • To review the existing literature on calcineurin inhibitors and their effects on parasitic infections.

Main Methods:

  • Narrative review of existing scientific literature.
  • Analysis of the mechanism of action of calcineurin inhibitors.
  • Comparison of tacrolimus and cyclosporine in the context of parasitic infections.

Main Results:

  • *Toxoplasma gondii* relies on the calcineurin pathway for survival and replication.
  • Cyclosporine exhibits in vitro and in vivo antiparasitic effects by inhibiting this pathway.
  • Tacrolimus shares a similar mechanism of action with cyclosporine.

Conclusions:

  • Tacrolimus warrants further investigation for its efficacy and safety in managing toxoplasmosis.
  • Calcineurin inhibitors represent a potential therapeutic avenue for toxoplasmosis.
  • Additional research is needed to establish tacrolimus's role in toxoplasmosis treatment, alone or in combination therapies.