Side-by-Side Comparison · 2026

Human Neutrophil Peptide 1 vs Pexiganan

Human Neutrophil Peptide 1 vs Pexiganan — mechanism, half-life, dosing, and research status compared. Which is right for your protocol?

Human Neutrophil Peptide 1
Antimicrobial Peptide

Human Neutrophil Peptide 1 (HNP-1) is the most abundant alpha-defensin in human neutrophil granules, where it constitutes up to 30% of total protein content. Alpha-defensins HNP-1, -2, -3, and -4 are the human versions of the ancestral defensin family....

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Pexiganan
Antimicrobial Peptide

Pexiganan (MSI-78) is a synthetic analog of magainin-2, optimized for enhanced broad-spectrum antimicrobial activity and reduced hemolytic toxicity. It was developed by Magainin Pharmaceuticals (later Genaera) as a topical treatment for mildly infected diabetic foot ulcers....

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Key Parameters
Parameter Human Neutrophil Peptide 1 Pexiganan
Category Antimicrobial Peptide Antimicrobial Peptide
Research Preclinical Phase 3 (Failed 1999)
Half-Life Hours (in tissues) Hours (topical)
Typical Dose N/A 0.8% cream topically
Frequency N/A Twice daily
Route Endogenous (secreted by neutrophils) / Research only Topical cream
FDA Status Not approved Not approved (failed Phase 3)

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Frequently Asked Questions
What is the difference between Human Neutrophil Peptide 1 and Pexiganan?
Human Neutrophil Peptide 1: Human Neutrophil Peptide 1 (HNP-1) is the most abundant alpha-defensin in human neutrophil granules, where it constitutes up to 30% of total protein content. Alpha-defensins HNP-1, -2, -3, and -4 are ... Pexiganan: Pexiganan (MSI-78) is a synthetic analog of magainin-2, optimized for enhanced broad-spectrum antimicrobial activity and reduced hemolytic toxicity. It was developed by Magainin Pharmaceuticals (later...
Which has a longer half-life, Human Neutrophil Peptide 1 or Pexiganan?
Human Neutrophil Peptide 1 half-life: Hours (in tissues). Pexiganan half-life: Hours (topical).
Can you stack Human Neutrophil Peptide 1 and Pexiganan?
Human Neutrophil Peptide 1 and Pexiganan are in the same category and used together in research protocols. Always consult relevant literature and follow appropriate guidelines.

For research use only. Not medical advice. ASCEND does not conduct or endorse any specific research protocol. Always consult relevant scientific literature and regulatory guidelines.