Palmitoyl Tripeptide-5 (SYN-COLL)
Palmitoyl Tripeptide-5 is a thrombospondin-1 mimetic lipopeptide that activates TGF-β signaling to stimulate procollagen I synthesis, marketed under the SYN-COLL brand name by DSM.
Palmitoyl Tripeptide-5 is a synthetic lipopeptide that mimics the activity of thrombospondin-1 (TSP-1), a naturally occurring matricellular glycoprotein that activates latent TGF-β. By engaging the TGF-β signaling cascade, this peptide stimulates fibroblast production of procollagen I, contributing to dermal matrix reinforcement and visible reduction in wrinkle depth.
Overview
Thrombospondin-1 is a large multifunctional glycoprotein (~450 kDa) that plays a critical role in activating latent TGF-β in the extracellular space. The full TSP-1 protein is impractical for topical delivery, but Palmitoyl Tripeptide-5 captures the key TGF-β-activating sequence in a small, skin-permeable format. The palmitoyl group enhances stratum corneum penetration, allowing the active tripeptide to reach dermal fibroblasts.
DSM developed SYN-COLL as a biomimetic approach to collagen stimulation that works through a distinct mechanism from other cosmetic peptides like Matrixyl (signal peptide) or Argireline (neuromuscular modulator). This mechanistic distinction makes it suitable for combination formulations targeting multiple aspects of skin aging.
Mechanism of Action
Palmitoyl Tripeptide-5 mimics the KRFK sequence region of thrombospondin-1 responsible for activating latent TGF-β. In the extracellular matrix, TGF-β is secreted as a latent complex bound to the latency-associated peptide (LAP). TSP-1 -- and by extension its mimetic peptide -- interacts with LAP to release active TGF-β.
Once liberated, active TGF-β binds to type II TGF-β receptors on fibroblast surfaces, initiating phosphorylation of Smad2/Smad3 transcription factors. The activated Smad complex translocates to the nucleus, where it upregulates transcription of:
- Procollagen I -- the precursor to the most abundant dermal collagen
- Tissue inhibitors of metalloproteinases (TIMPs) -- which reduce MMP-mediated collagen degradation
- Other ECM glycoproteins supporting dermal structural integrity
This dual action of promoting synthesis while reducing degradation distinguishes the TSP-1 mimetic approach from simple signal peptides.
The selectivity of TGF-β activation is important for safety: Palmitoyl Tripeptide-5 activates TGF-β locally and transiently at the application site. Systemic or prolonged TGF-β activation would be undesirable due to potential fibrotic effects, but the low concentrations and topical delivery route ensure that signaling remains confined to the dermal microenvironment.
Reconstitution Calculator
Reconstitution Calculator
Calculate your peptide dosing
Set up a clean workspace with all supplies ready.
7x / week for weeks
Research
Procollagen Synthesis
In vitro studies on human dermal fibroblasts demonstrated that Palmitoyl Tripeptide-5 stimulates procollagen I synthesis in a dose-dependent manner. At concentrations achievable through topical application, the peptide increased procollagen production by up to 119% compared to untreated controls, as reported in DSM's technical documentation.
Clinical Anti-Wrinkle Efficacy
Double-blind, placebo-controlled clinical studies evaluating SYN-COLL at 4 ppm in a cream base applied twice daily for 84 days demonstrated significant improvements in wrinkle parameters. Profilometric analysis showed reductions in wrinkle depth and volume, with visible improvements noted by expert graders and self-assessment panels. The effect was progressive, with continued improvement observed through the study duration.
TGF-β Pathway Validation
Mechanistic studies confirmed that the anti-aging effects of Palmitoyl Tripeptide-5 are mediated through TGF-β pathway activation. Neutralizing antibodies against TGF-β abolished the procollagen-stimulating effect of the peptide in fibroblast cultures, confirming the TSP-1 mimetic mechanism rather than a nonspecific mitogenic effect.
Comparison with Other Collagen-Stimulating Peptides
Palmitoyl Tripeptide-5 operates through a fundamentally different pathway than Palmitoyl Tripeptide-1 (matrikine signaling) or Palmitoyl Pentapeptide-4 (collagen fragment signaling). This mechanistic diversity makes these peptides complementary rather than redundant in multi-peptide formulations.
Thrombospondin Biology
Thrombospondin-1 is a 450 kDa homotrimeric glycoprotein secreted by platelets, endothelial cells, and fibroblasts. Its role as the major physiological activator of latent TGF-β was established by Crawford et al., who demonstrated that TSP-1 null mice exhibit a phenotype overlapping with TGF-β1 null mice. The KRFK activation sequence within TSP-1's type 1 repeats directly engages the latency-associated peptide, inducing a conformational change that releases mature TGF-β. Palmitoyl Tripeptide-5 captures this activation function in a three-residue peptide, representing one of the most efficient biomimetic designs in cosmetic peptide science.
Safety Profile
Palmitoyl Tripeptide-5 demonstrates an excellent safety profile in topical use. Clinical studies report no significant adverse effects, irritation, or sensitization at recommended concentrations. The TGF-β activation is localized and transient, with no evidence of systemic effects or fibrotic responses from topical application. Standard safety testing including patch testing, phototoxicity, and mutagenicity assays support its safety for cosmetic use.
Pharmacokinetic Profile
Quick Start
- Route
- Topical (serum, cream)
Research Protocols
topical
The full TSP-1 protein is impractical for topical delivery, but Palmitoyl Tripeptide-5 captures the key TGF-β-activating sequence in a small, skin-permeable format. Systemic or prolonged TGF-β activation would be undesirable due to potential fibrotic effects, but the low concentrations and topical d
| Goal | Dose | Frequency | Duration |
|---|---|---|---|
| General Research Protocol | See literature | Twice daily | 84 days(Route: Topical) |
Interactions
Peptide Interactions
Palmitoyl Tripeptide-5 operates through a fundamentally different pathway than Palmitoyl Tripeptide-1 (matrikine signaling) or Palmitoyl Pentapeptide-4 (collagen fragment signaling).
Palmitoyl Tripeptide-5 operates through a fundamentally different pathway than Palmitoyl Tripeptide-1 (matrikine signaling) or Palmitoyl Pentapeptide-4 (collagen fragment signaling).
Palmitoyl Tripeptide-5 operates through a fundamentally different pathway than Palmitoyl Tripeptide-1 (matrikine signaling) or Palmitoyl Pentapeptide-4 (collagen fragment signaling). This mechanistic diversity makes these peptides complementary rather than redundant in multi-peptide formulations.
Quality Indicators
What to look for
- Naturally occurring compound
Frequently Asked Questions
References (4)
- [5]
- [3]
- [4]Schultz GS, Wysocki A Interactions between extracellular matrix and growth factors in wound healing Wound Repair Regen (2009)
- [1]Lintner K et al Cosmetic peptides Int J Cosmet Sci (2009)
Palmitoyl Tripeptide-38
Palmitoyl Tripeptide-38 (MATRIXYL synthe'6) is a synthetic signal peptide developed by Sederma that stimulates production of six major extracellular matrix proteins, researched for its comprehensive anti-aging and skin-restructuring properties.
Pancreatic Polypeptide (PP)
Pancreatic polypeptide (PP) is a 36-amino acid peptide hormone released from PP cells of the pancreatic islets of Langerhans. A member of the NPY family alongside PYY and NPY, PP preferentially binds Y4 receptors and functions as an appetite suppressant, gastric motility modulator, and inhibitor of exocrine pancreatic secretion. PP is investigated as a satiety factor, metabolic regulator, and pancreatic tumor biomarker.