What are Polynucleotides: The Scientific Mechanisms and Clinical Evidence

Quick Facts & Executive Summary

Attribute	Specification
INCI Name	Polynucleotide / Sodium DNA
Ingredient Class	High-Molecular Weight DNA Polymer / 3D Bio-Scaffold / Biostimulator
Primary Biological Target	Adenosine A2A Receptors & Extracellular Matrix Micro-Environment
Primary Aesthetic Outcome	Structural Matrix Repair, Prolonged 3D Hydration & Tissue Regeneration

PN (Polynucleotide) is a long-chain, high-molecular-weight DNA polymer purified from salmonid germ cells. In advanced regenerative aesthetics, PN acts as a 3D physical matrix scaffold and biostimulator. It selectively binds adenosine A2A receptors, stimulates dermal fibroblast activity, downregulates pro-inflammatory signals, and provides long-lasting water-binding capacity within the extracellular matrix.

What is PN? (Definition & Origin)

PN consists of high-molecular-weight DNA chains (typically ranging from 1,000 to 1,500 kDa or higher). It is extracted from salmon (Salmo salar) or trout (Oncorhynchus mykiss) sperm cells using high-purification technology that removes active proteins, endotoxins, and immunogenic impurities.

Because salmonid DNA exhibits over 95% structural homology with human DNA, PN demonstrates exceptional bio-compatibility and minimal risk of immunological reaction upon administration.

Unlike shorter DNA fragments, PN forms a 3D viscoelastic hydrogel network when introduced to tissue. This dual physical and biochemical structure allows PN to act simultaneously as a durable matrix scaffold and a continuous signal donor for cellular regeneration.

The Science & Cellular Mechanism of Action

PN operates at the cellular and molecular level through three primary physiological pathways:

Adenosine A2A Receptor Binding & Anti-Inflammatory Regulation: PN binds selectively to adenosine A2A receptors on fibroblast and immune cell membranes. This binding triggers an intracellular cascade that downregulates pro-inflammatory cytokines (such as TNF-alpha and IL-6) while promoting tissue repair and suppressing post-procedure erythema.
Salvage Pathway Nucleotide Supply: Synthesizing new DNA requires substantial metabolic energy. PN supplies ready-to-use purine and pyrimidine nucleotides via the purinergic salvage pathway, allowing damaged or aging fibroblasts to accelerate DNA repair and protein synthesis without excessive cellular ATP expenditure.
3D Hydro-Scaffolding & Water Retention: High-molecular-weight PN polymers create a polymeric 3D scaffold in the extracellular matrix. This physical network binds water tightly within its spatial lattice, creating a hydrated micro-environment that supports fibroblast migration and structural matrix assembly.

Clinical Evidence & Direct Skin Impact

Because PN provides a 3D physical matrix and activates adenosine receptors, its inclusion in aesthetic formulations directly influences tissue repair speed and structural skin density.

Drives Fibroblast Proliferation & Collagen Synthesis: Clinical and histological evaluations demonstrate that PN significantly enhances dermal fibroblast activity, upregulating Type I collagen and fibronectin expression to improve skin elasticity and thickness.
Improves Skin Hydration & Surface Smoothness: Clinical trials evaluating PN show statistically significant increases in cutaneous moisture levels, alongside notable reductions in skin roughness and superficial fine lines.
Accelerates Tissue Repair & Barrier Recovery: In vivo research assessing compromised tissue confirms that PN accelerates re-epithelialization and restores barrier function following physical or environmental stress.

Ninaveli’s Strategic Formulations

At Ninaveli, we incorporate high-purity PN across our advanced regenerative biostimulatory and skin booster product range, specifically featured in the following signature formulations:

Ninaveli PN 2% and Ninaveli PN 2% Face: Formulated as highly purified 20mg/ml (2%) Polynucleotide products in a in a 2.5ml syringe for Ninaveli PN 2% and a 5ml sterile vial for Ninaveli PN 2% Face.
Ninaveli PN Pro: Formulated as a 2ml syringe containing 2% highly purified Polynucleotides and gold-standard KFDA product certification.
Ninaveli PN+HA and Ninaveli Face Glow: Formulated as skin boosters pairing 10mg/ml Polynucleotides with 10mg/ml Hyaluronic Acid in a 2.5ml syringe for Ninaveli PN + HA and a 5ml sterile vial for Ninaveli Face Glow.
Ninaveli HI-LO: Formulated as a 2.5ml syringe combining 0.5% Polynucleotides with dual-weight Hyaluronic Acid (70mg H-HA and 10mg L-HA).
Ninaveli Exoleen: Formulated with Polynucleotides alongside Hyaluronic Acid, Proteoglycan, Peptides, and Tranexamic Acid in activating liquid vial 2.
Ninaveli Classic NAD+ NMN: Formulated as a ready-to-use liquid solution containing Polynucleotides alongside NAD+, NMN, and NR.

Clinical Study References

Lazzari, E., et al. (2026). A Real-Life Assessment of Injectable Polynucleotides High Purification Technology in Aesthetic Medicine for Skin Rejuvenation. Journal of Cosmetic Dermatology, 25(1), e70532.Read Study on PubMed (DOI: 10.1111/jocd.170532)
Ha, Y. J., et al. (2024). The Effect of Polynucleotide-Hyaluronic Acid Hydrogel in the Recovery After Mechanical Skin Barrier Disruption. Skin Research and Technology, 30(9), e70068.Read Study on CrossRef (DOI: 10.1111/srt.70068)
Squadrito, F., et al. (2017). Polydeoxyribonucleotide (PDRN): From biochemistry to clinical application. Frontiers in Pharmacology, 8, 224.Read Study on PubMed (DOI: 10.3389/fphar.2017.00224)

Frequently Asked Questions

How does PN specifically differ from PDRN?

PN and PDRN are both derived from salmonid DNA, but they differ primarily in molecular weight and structural behavior. PDRN consists of smaller DNA fragments (50 to 1,500 kDa) designed for rapid absorption and cell signaling via adenosine receptors. Polynucleotides (PN) consist of longer, higher-molecular-weight DNA chains (1,000 to 1,500 kDa+) that form a 3D viscoelastic hydrogel network. This higher molecular structure provides sustained physical scaffolding and long-term hydration alongside biostimulatory action.

What biological role do Adenosine A2A receptors play when activated by PN?

Adenosine A2A receptors are G-protein coupled receptors located on dermal fibroblasts, endothelial cells, and immune cells. When PN binds to these receptors, it triggers intracellular pathways that suppress pro-inflammatory cytokines (such as TNF-alpha and IL-6) while stimulating VEGF release and fibroblast proliferation. This interaction helps transition tissue from an inflammatory state into an active matrix-building and repair phase.

Which Ninaveli products incorporate PN?

Ninaveli incorporates bio-grade PN into Ninaveli PN 2%, Ninaveli PN 2% Face, Ninaveli PN + HA, Ninaveli Face Glow, Ninaveli HI-LO, Ninaveli Exoleen, and Ninaveli Classic NAD+ NMN. In Ninaveli PN 2% and Ninaveli PN 2% Face, high-purity 2% Polynucleotides act as a dedicated biostimulator. In Ninaveli PN + HA and Ninaveli Face Glow, PN is paired with Hyaluronic Acid to create a premium biostimulator. In Ninaveli HI-LO, PN is combined with dual-weight HA. In Ninaveli Exoleen and Ninaveli Classic NAD+ NMN, PN is synergized in multi-active liquid matrices. PN is praised for its ability to provide 3D matrix scaffolding, activate adenosine A2A receptors, supply essential nucleotides for cellular repair, and promote a firm, elastic, and rejuvenated complexion.

Disclaimer: The content provided in the Ninaveli Knowledge Hub is for informational and educational purposes only. This content is not intended to be a substitute for professional medical advice, diagnosis, or treatment and should not be used as such. Always seek the advice of a qualified healthcare provider or dermatologist with any questions you may have regarding a medical condition or before starting any new skincare regimen. Ninaveli does not guarantee the accuracy, completeness, or timeliness of the information provided and assumes no liability for any actions taken based on this content.