A randomized Phase I study of Atuna racemosa

A potential new anti-MRSA natural product extract

Eric J. Buenz, Brent A Bauer, David J. Schnepple, Dietlind L. Wahner-Roedler, Alexander G. Vandell, Charles L Howe

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Aim: We previously reported significant antimicrobial activity against Gram-positive bacteria from the extract of the Atun tree (Atuna racemosa), identified through rapid digital bioprospecting of a 400-year-old historic herbal text. Toxicity studies in human cell lines showing safety, combined with the ethnomedical descriptions of botanical use, suggested that this extract might be clinically useful against topical Gram-positive bacteria infections. Materials and methods: Using a minimal inhibitory concentration assay, we examined the susceptibility of methicillin-resistant Staphylococcus aureus (MRSA) to an extract of the kernel of the Atun tree (Atuna racemosa). Additionally, a maximum tolerated topical application of the extract was determined in a randomized, double-blind, placebo-controlled pilot clinical trial. Results: Here we report that the effectiveness of this Atuna racemosa extract against MRSA (MIC = 16-32 μg/mL) is on par with currently available last-line antibiotics, while it remains well tolerated in short-term topical applications of 10 times the minimally inhibitory concentration. Conclusions: Although further studies are needed to determine safety and clinical efficacy, this effective extract, identified in a 400-year-old historic herbal text, may prove to be clinically useful in the treatment of MRSA.

Original languageEnglish (US)
Pages (from-to)371-376
Number of pages6
JournalJournal of Ethnopharmacology
Volume114
Issue number3
DOIs
StatePublished - Dec 3 2007

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Methicillin-Resistant Staphylococcus aureus
Biological Products
Gram-Positive Bacteria
Safety
Controlled Clinical Trials
Placebos
Anti-Bacterial Agents
Cell Line
Infection
Therapeutics

Keywords

  • Antibacterial
  • MRSA
  • Natural product
  • Phase I
  • Plant
  • Samoa

ASJC Scopus subject areas

  • Pharmacology

Cite this

A randomized Phase I study of Atuna racemosa : A potential new anti-MRSA natural product extract. / Buenz, Eric J.; Bauer, Brent A; Schnepple, David J.; Wahner-Roedler, Dietlind L.; Vandell, Alexander G.; Howe, Charles L.

In: Journal of Ethnopharmacology, Vol. 114, No. 3, 03.12.2007, p. 371-376.

Research output: Contribution to journalArticle

Buenz, Eric J. ; Bauer, Brent A ; Schnepple, David J. ; Wahner-Roedler, Dietlind L. ; Vandell, Alexander G. ; Howe, Charles L. / A randomized Phase I study of Atuna racemosa : A potential new anti-MRSA natural product extract. In: Journal of Ethnopharmacology. 2007 ; Vol. 114, No. 3. pp. 371-376.
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