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Peptide

Plitidepsin (Aplidin)

Plitidepsin is a cyclic depsipeptide originally from Mediterranean marine tunicate Aplidium albicans, now synthesized. FDA/EMA orphan drug status for multiple myeloma. Approved in Australia (2018) for relapsed/refractory MM. Phase III trials ongoing for breast and lung cancers. Targets eEF1A2 protein overexpressed in cancer. Phase I/II: Demonstrated antitumor activity with tolerable safety. Enhanced efficacy with dexamethasone combination. Safe cardiac profile (1.9% drug-related cardiac AEs in 578 patients). Also studied for COVID-19.

Research notice. This page is for education and research. Peptides may not be FDA-approved for human use and may only be legally available for research. Talk to a qualified clinician before considering any peptide.

Best evidence
Grade A
Conditions studied
2
Outcomes
13
Graded outcomes
1273

Evidence by condition

  • Strong
  • Moderate
  • Limited
  • Very limited

2 conditions, plus general outcomes

Cancer

Cancer: outcomes studied for Plitidepsin (Aplidin)
GradeOutcomeEffectSizeStudiesPeopleStudies list
Cardiac Safety Profile

Comprehensive analysis (n=578): Only 1.9% drug-related cardiac AEs. No fatal cardiac events. Atrial fibrillation most common (2.6%). No life-threatening ventricular arrhythmias. Safe cardiac profile confirmed.

Improves (the measure goes up)Moderate effect5 studies
Multiple Myeloma (with Dexamethasone)

Approved in Australia (2018) for relapsed/refractory MM. Enhanced activity with dexamethasone addition. Phase III trial comparing plitidepsin+dex vs dex alone. Orphan drug status in US and EU.

Improves (the measure goes up)Moderate effect5 studies

Studies that measured multiple myeloma (with dexamethasone)

Solid Tumor Response

Phase I/II trials: Limited single-agent activity in solid tumors (melanoma, breast, lung). Phase III ongoing for breast and lung cancers. Better activity expected in combination regimens.

Improves (the measure goes up)Small effect6 studies
T-Cell Lymphoma

Phase II: Evaluated in noncutaneous peripheral T-cell lymphoma. Limited single-agent activity. Tolerable safety profile. Combination strategies being explored.

Improves (the measure goes up)Small effect4 studies

General

General: outcomes studied for Plitidepsin (Aplidin)
GradeOutcomeEffectSizeStudiesPeopleStudies list
Anti-Cancer Activity

33 human trials and systematic reviews support this finding. Evidence includes systematic reviews/meta-analyses. Human clinical trial data available.

Improves (the measure goes up)Moderate effect11 studies

Studies that measured anti-cancer activity

and 1 more in the citations list

Antimicrobial Activity

6 preclinical studies support this finding. Primarily preclinical evidence.

Improves (the measure goes up)Small effect7 studies

Studies that measured antimicrobial activity

Cancer Cell Apoptosis

3 human trials support this finding. Human clinical trial data available.

Improves (the measure goes up)Small effect4 studies
Pulmonary Function

3 human trials support this finding. Human clinical trial data available.

Improves (the measure goes up)Small effect4 studies

Studies that measured pulmonary function

Kidney Function

3 human trials support this finding. Human clinical trial data available.

Improves (the measure goes up)Small effect4 studies
Safety/Tolerability

2 preclinical studies support this finding. Primarily preclinical evidence.

Improves (the measure goes up)Small effect3 studies
Liver Protection

2 human trials support this finding. Human clinical trial data available.

Improves (the measure goes up)Small effect3 studies
Immune Function

2 human trials support this finding. Human clinical trial data available.

Improves (the measure goes up)Small effect3 studies

Respiratory Health: outcomes studied for Plitidepsin (Aplidin)
GradeOutcomeEffectSizeStudiesPeopleStudies list
COVID-19 Antiviral Activity

In vitro and animal models: Significant reductions in SARS-CoV-2 viral load and pulmonary inflammation. Mechanism via eEF1A2 inhibition blocking viral replication. Clinical trials for COVID-19 application.

Improves (the measure goes up)Moderate effect5 studies

Key findings

  • Cardiac Safety ProfileImproves (the measure goes up)
  • Anti-Cancer ActivityImproves (the measure goes up)
  • Multiple Myeloma (with Dexamethasone)Improves (the measure goes up)

Studies cited

34 studies from PubMed

  1. Marine-Derived Compounds: A New Horizon in Cancer, Renal, and Metabolic Disease Therapeutics.Marine drugs, 2025 · PMID 40710508
  2. Targeting eEF1A reprograms translation and uncovers broad-spectrum antivirals against cap or m(6)A protein synthesis routes.Nature communications, 2025 · PMID 39920115
  3. Functional characteristics of plitidepsin as an antiviral treatment against monkeypox virus infection.Antiviral research, 2025 · PMID 40675496
  4. Can plitidepsin be used as an antiviral against RSV?mSphere, 2025 · PMID 41277830
  5. Plitidepsin as an Immunomodulator against Respiratory Viral Infections.Journal of immunology (Baltimore, Md. : 1950), 2024 · PMID 38416036
  6. Outcomes and clinical characteristics of the compassionate use of plitidepsin for immunocompromised adult patients with COVID-19.International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases, 2023 · PMID 37481109
  7. Unraveling the antiviral activity of plitidepsin against SARS-CoV-2 by subcellular and morphological analysis.Antiviral research, 2022 · PMID 35231500
  8. Marine Cyclic Peptides: Antimicrobial Activity and Synthetic Strategies.Marine drugs, 2022 · PMID 35736200
  9. Plitidepsin has potent preclinical efficacy against SARS-CoV-2 by targeting the host protein eEF1AScience, 2021 · PMID 33811827
  10. Plitidepsin: Mechanisms and Clinical Profile of a Promising Antiviral Agent against COVID-19.Journal of personalized medicine, 2021 · PMID 34357135
  11. Plitidepsin to treat multiple myelomaDrugs Today, 2020 · PMID 32406881
  12. Generation of endoplasmic reticulum stress and inhibition of autophagy by plitidepsin induces proteotoxic apoptosis in cancer cells.Biochemical pharmacology, 2020 · PMID 31812675
  13. Plitidepsin: design, development, and potential place in therapyDrug Des Devel Ther, 2017 · PMID 28176904
  14. Evaluation of plitidepsin in patients with primary myelofibrosis and post polycythemia vera/essential thrombocythemia myelofibrosisBlood Cancer J, 2015 · PMID 25617218
  15. Evaluation of plitidepsin in patients with primary myelofibrosis and post polycythemia vera/essential thrombocythemia myelofibrosis: results of preclinical studies and a phase II clinical trial.Blood cancer journal, 2015 · PMID 25768401
  16. Nano-encapsulation of plitidepsin: in vivo pharmacokinetics, biodistribution, and efficacy in a renal xenograft tumor model.Pharmaceutical research, 2014 · PMID 24287622
  17. Plitidepsin has a safe cardiac profile: a comprehensive analysisMar Drugs, 2011 · PMID 21747745
  18. CXCR4-independent rescue of the myeloproliferative defect of the Gata1low myelofibrosis mouse model by Aplidin.Journal of cellular physiology, 2010 · PMID 20458749
  19. Phase II study of weekly plitidepsin as second-line therapy for small cell lung cancer.Lung cancer (Amsterdam, Netherlands), 2009 · PMID 18692272
  20. Population pharmacokinetics meta-analysis of plitidepsin (Aplidin) in cancer subjects.Cancer chemotherapy and pharmacology, 2009 · PMID 18941750
  21. Phase II randomized study of Plitidepsin (Aplidin), alone or in association with L-carnitine, in patients with unresectable advanced renal cell carcinoma.Marine drugs, 2009 · PMID 19370171
  22. Phase I Clinical and Pharmacokinetic Study of Plitidepsin as a 1-Hour Weekly Intravenous Infusion in Patients with Advanced Solid TumorsClin Cancer Res, 2008 · PMID 18413811
  23. Phase II study of plitidepsin in pretreated patients with locally advanced or metastatic non-small cell lung cancer.Lung cancer (Amsterdam, Netherlands), 2008 · PMID 18054408
  24. Phase I clinical and pharmacokinetic study of plitidepsin as a 1-hour weekly intravenous infusion in patients with advanced solid tumors.Clinical cancer research : an official journal of the American Association for Cancer Research, 2008 · PMID 18483378
  25. Plitidepsin has a dual effect inhibiting cell cycle and inducing apoptosis via Rac1/c-Jun NH2-terminal kinase activation in human melanoma cellsJ Pharmacol Exp Ther, 2007 · PMID 18089842
  26. Proteomic analysis of the resistance to aplidin in human cancer cells.Journal of proteome research, 2007 · PMID 17338558
  27. Aplidin synergizes with cytosine arabinoside: functional relevance of mitochondria in Aplidin-induced cytotoxicity.Leukemia, 2007 · PMID 17713546
  28. Gateways to clinical trials.Methods and findings in experimental and clinical pharmacology, 2007 · PMID 17805439
  29. Oxidation and inactivation of low molecular weight protein tyrosine phosphatase by the anticancer drug Aplidin.International journal of cancer, 2006 · PMID 16287083
  30. Aplidin induces JNK-dependent apoptosis in human breast cancer cells via alteration of glutathione homeostasis, Rac1 GTPase activation, and MKP-1 phosphatase downregulation.Cell death and differentiation, 2006 · PMID 16543941
  31. Induction of resistance to Aplidin in a human ovarian cancer cell line related to MDR expression.Cancer biology & therapy, 2005 · PMID 16258264
  32. Plitidepsin has a cytostatic effect in human undifferentiated (anaplastic) thyroid carcinoma.Clinical cancer research : an official journal of the American Association for Cancer Research, 2005 · PMID 16278386
  33. Aplidin induces apoptosis in human cancer cells via glutathione depletion and sustained activation of the epidermal growth factor receptor, Src, JNK, and p38 MAPK.The Journal of biological chemistry, 2003 · PMID 12414812
  34. In vitro cytotoxicity of aplidin and crossresistance with other cytotoxic drugs in childhood leukemic and normal bone marrow and blood samples: a rational basis for clinical development.Leukemia, 2003 · PMID 12835722