Polynucleotide Treatments: The New Frontier in Skin Regeneration

What Are Polynucleotide Treatments?

Polynucleotide (PN) treatments represent one of the most exciting frontiers in regenerative aesthetics — injectable therapies that use DNA-derived fragments to stimulate cellular repair and tissue regeneration at the molecular level. These treatments harness purified polynucleotide chains (fragments of DNA) sourced from salmon or trout to activate the body's own repair mechanisms, improve skin quality, and promote genuine tissue regeneration.

The science behind polynucleotides isn't new — PDRN (Polydeoxyribonucleotide, a specific type of polynucleotide) has been used in medical settings for wound healing, tissue repair, and orthopedic medicine for years. Its application in aesthetic medicine, however, has surged in recent years as researchers and practitioners recognized its remarkable ability to improve skin quality, reduce under-eye concerns, and promote healing in ways that hyaluronic acid-based treatments cannot.

Popular polynucleotide products include Plinest, Ameela, Nucleofill, Rejuran (particularly popular in South Korea), and Mastelli PDRN.

The Science: How Polynucleotides Work

Understanding the Biology

Polynucleotides are long chains of nucleotides — the building blocks of DNA. When purified and injected into the skin, these DNA fragments interact with cellular receptors and pathways to produce multiple regenerative effects:

1. Adenosine A2A Receptor Activation

The primary mechanism of action. PDRN and PN fragments are metabolized by the body into individual nucleotides, which are further broken down into nucleosides — including adenosine. Adenosine binds to A2A receptors on cell surfaces, triggering:

Anti-inflammatory effects — reduction of pro-inflammatory cytokines (TNF-α, IL-6, IL-8)
Pro-regenerative signaling — activation of cellular repair pathways
VEGF stimulation — increased vascular endothelial growth factor production, improving blood supply to the tissue

2. Salvage Pathway Activation

Cells can use the nucleotide fragments as raw materials through the "salvage pathway" — recycling the DNA building blocks to:

Support new DNA synthesis in dividing cells
Accelerate cell proliferation, particularly of fibroblasts
Enhance the metabolic efficiency of skin cells
Support tissue repair in damaged or aged skin

3. Fibroblast Stimulation

Polynucleotides directly stimulate fibroblast activity:

Increased collagen Type I production
Enhanced elastin synthesis
Improved extracellular matrix quality
Greater cell proliferation rates

4. Anti-Inflammatory Action

The adenosine-mediated anti-inflammatory effect is particularly valuable for:

Reducing chronic low-grade inflammation that accelerates aging (inflammaging)
Improving conditions like rosacea and post-inflammatory erythema
Calming reactive, sensitized skin
Supporting healing after other aesthetic procedures

Where Does the DNA Come From?

The polynucleotides used in aesthetic treatments are derived from salmon or trout DNA (specifically from the gonads/sperm cells, which are DNA-rich). The extraction process involves:

Purification to remove all protein content (eliminating allergenic potential)
Sterilization for injection safety
Quality control to ensure consistent molecular weight and purity

The final product contains only purified DNA fragments — no fish proteins, no allergens, no cellular material.

What Do Polynucleotide Treatments Treat?

Skin Quality and Rejuvenation

Overall skin quality improvement — texture, firmness, elasticity, and radiance
Fine lines and superficial wrinkles — particularly dehydration-related lines
Dull, tired-looking skin — restored luminosity through improved cellular function
Thinning skin — stimulation of dermal thickness through collagen production

Under-Eye Rejuvenation

The under-eye area has become one of polynucleotides' most celebrated applications:

Dark circles — improved microcirculation and tissue quality reduce discoloration
Thin, crepey under-eye skin — polynucleotides increase skin thickness in this delicate area
Hollowing — while not a volumizer, improved tissue quality can subtly improve the appearance of mild hollowness
Fine lines under the eyes — collagen stimulation smooths periorbital creasing

The under-eye area is particularly well-suited to polynucleotides because traditional HA fillers carry risks (Tyndall effect, puffiness) in this delicate zone, while polynucleotides offer improvement with a different, lower-risk mechanism.

Scar Treatment

Polynucleotides show promise for various scar types:

Acne scars (particularly atrophic scars)
Post-surgical scars
Stretch marks
Post-inflammatory scarring

Hair Restoration

Emerging evidence supports polynucleotide injections for hair loss:

Improved scalp blood supply through VEGF stimulation
Reduced scalp inflammation
Enhanced hair follicle cell proliferation
Complementary to PRP/PRF for hair regrowth protocols

Post-Procedure Healing

Polynucleotides are increasingly used as an adjunct treatment after aggressive procedures:

Accelerated healing after laser resurfacing
Reduced downtime after chemical peels
Enhanced recovery after microneedling
Reduced post-inflammatory redness and sensitivity

The Treatment Experience

Treatment Process

Consultation — Assessment of skin quality and concerns; discussion of treatment goals
Cleansing — Treatment area thoroughly cleaned
Optional numbing — Topical anesthetic applied if desired (many patients tolerate without)
Injection — Product delivered via micro-injections in a grid pattern or via cannula, depending on the area
Duration — 15–30 minutes
Post-treatment — Gentle pressure applied; moisturizer and SPF

Injection Techniques

Face:

Multiple micro-injections in a grid pattern (similar to skin booster technique)
Alternatively, using the BAP technique (specific anatomical injection points)
Some providers use a cannula for broader distribution

Under-eye:

Careful micro-injections using a fine needle or microcannula
Typically 2–4 injection points per side
Very small volumes (0.1–0.2ml per side)

Scalp:

Multiple micro-injections across the affected area
Similar technique to PRP scalp injections

Comfort Level

Discomfort is generally mild: 2–3 out of 10
The injections are superficial and use fine needles (30–32G)
Topical numbing is available for sensitive patients
The under-eye area is the most sensitive treatment zone

Recovery

Polynucleotide treatments have minimal downtime:

Immediately after: Small bumps at injection sites, mild redness
Hours 2–12: Bumps begin to flatten; redness subsides
Day 1–2: Skin returns to normal appearance; mild tenderness possible
Week 1–2: Early improvements in skin hydration and radiance become noticeable
Weeks 4–8: Progressive improvement in skin quality, firmness, and under-eye appearance
Weeks 8–12: Full results from the treatment series

Post-Treatment Care

Avoid touching the injection sites for 6–12 hours
No makeup for 12–24 hours
Avoid extreme temperatures (saunas, ice packs) for 24 hours
Apply SPF 30+ daily
Use gentle skincare products for 48 hours

Treatment Protocol

Standard Protocol

3–4 sessions spaced 2–4 weeks apart
Each session builds on the regenerative effects of the previous one
Cumulative improvement is the norm

Maintenance

Every 3–6 months after completing the initial series
Some patients maintain with quarterly sessions
Maintenance frequency depends on individual response and aging severity

Who Is a Good Candidate?

Ideal Candidates

Patients seeking skin quality improvement through a regenerative (not volumizing) approach
Those with dark circles and under-eye concerns who want an alternative to HA fillers
Patients with inflammatory skin tendencies (rosacea, sensitive skin, post-inflammatory redness)
Those interested in cellular-level regeneration rather than cosmetic masking
Patients with thin, aging skin that would benefit from increased dermal thickness
As an adjunct for post-procedure healing acceleration

Skin Type Suitability

Polynucleotide treatments are safe for all skin types (Fitzpatrick I–VI). They contain no melanin-targeting components and carry no risk of pigmentary complications.

Contraindications

Known fish allergy (some products are salmon-derived — though the purification process removes all allergenic proteins, this remains a precautionary contraindication)
Active infection in the treatment area
Pregnancy and breastfeeding
Autoimmune conditions (relative contraindication — discuss with provider)

Cost Considerations

Per session: $400–$900
Initial series (3–4 sessions): $1,200–$3,600
Annual maintenance (2–4 sessions): $800–$3,600
Under-eye specific treatment: $300–$700 per session

Pricing varies significantly by product (Rejuran, Plinest, Nucleofill, etc.), provider expertise, and geographic location.

Polynucleotides vs. Other Regenerative Treatments

Polynucleotides vs. PRP/PRF

Both are regenerative treatments but use different biological materials:

PRP/PRF uses your own blood-derived growth factors
Polynucleotides use purified DNA fragments
They work through different cellular pathways and can be combined synergistically
PRP/PRF requires a blood draw; polynucleotides are an off-the-shelf product

Polynucleotides vs. Skin Boosters (HA)

HA skin boosters primarily hydrate through water binding
Polynucleotides regenerate through cellular repair pathway activation
HA provides more immediate visible hydration
Polynucleotides provide deeper biological regeneration
They address different aspects of skin quality and combine well

Polynucleotides vs. Exosome Therapy

Both represent cutting-edge regenerative approaches:

Exosomes deliver cellular signaling molecules (growth factors, mRNA, proteins)
Polynucleotides provide DNA building blocks and adenosine receptor activation
Both stimulate cellular repair but through distinct mechanisms
The evidence base for polynucleotides is more established in peer-reviewed literature

The Evidence Base

The scientific support for polynucleotide treatments is growing:

Multiple peer-reviewed studies demonstrating PDRN's wound-healing properties
Clinical trials showing improved skin quality metrics (hydration, elasticity, firmness)
Histological evidence of increased collagen and elastin production
Established mechanism of action through A2A receptor pathway
Strong safety record from years of medical use in wound healing and orthopedics

The aesthetic application evidence, while newer, benefits from the robust foundational research on PDRN's biological mechanisms.

The Bottom Line

Polynucleotide treatments represent a fundamentally different approach to skin rejuvenation — one that works at the molecular level to stimulate genuine cellular repair rather than adding external materials or masking aging signs. The technology leverages well-understood biological pathways (adenosine receptor activation, salvage pathway utilization, fibroblast stimulation) to produce measurable improvements in skin quality.

For patients seeking treatments that work with their biology rather than on top of it, polynucleotides offer a compelling proposition — particularly for under-eye rejuvenation, inflammatory skin conditions, and overall skin quality improvement. As the evidence base continues to grow and more products enter the market, polynucleotide treatments are positioned to become a cornerstone of regenerative aesthetics alongside PRP, exosomes, and bio-remodeling injectables.