Science
Mechanism of Action
As a metalloprotease, serralysin functions by dissolving compromised cellular material. Its anti-inflammatory and analgesic effects are achieved through the degradation of specific inflammation-causing amino acid derivatives, including histamine, serotonin, and bradykinin. However, some research indicates that serralysin, particularly when derived from *Serratia marcescens*, can activate Protease-Activated Receptor 2 (PAR-2) in certain cell lines, potentially leading to the induction of pro-inflammatory cytokines like IL-6 and IL-8, a mechanism associated with bacterial virulence. Topically, it is recognized for its role as a skin conditioning agent and emollient.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Serralysin's activity as a metalloprotease is dependent on zinc, an essential element, with calcium binding crucial for its folding and stability. Maximum enzymatic activity is typically observed around pH 9.0, with stability maintained within a pH range of approximately 6.5 to 9.0. Its activity significantly decreases at temperatures exceeding 55°C.
Conflicts
- EDTA (completely inhibits activity)
- Extreme pH values (outside of 6.5-9.0 range)
- High temperatures (above 55°C)
Safety
Safety Profile
Serralysin, also known as serrapeptase, has a long history of use in nutritional supplements and medicinal applications in parts of Asia and Europe. However, there are no readily available specific safety assessments for its use as a cosmetic ingredient from regulatory bodies such as CIR, SCCS, or FDA. The enzyme is often sourced from *Serratia marcescens*, an opportunistic pathogen, and serralysin from this origin has been associated with lung and corneal damage. Additionally, its potential to activate PAR-2 and induce pro-inflammatory cytokines warrants caution regarding its suitability for sensitive skin or long-term cosmetic applications without comprehensive, cosmetic-specific safety data.
Your Skin
Skin Compatibility
Our Assessment
Verdict
While serralysin presents intriguing proteolytic and anti-inflammatory properties, its safety profile in cosmetic applications is largely unassessed, with potential pro-inflammatory activation and origins from an opportunistic pathogen raising significant concerns.
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