Deep Regeneration Biology
Cells, Genes, ECM & Energy — The Systems That Control Healing
Fibroblasts • Keratinocytes • Growth Factors • ECM • SMAS Healing • Gene Expression • Scar Biology • Ageing Repair Decline
FIBROBLASTS: “THE ARCHITECTS OF YOUTH”
Fibroblasts build and maintain your skin’s deeper structure.
They produce:
- Collagen types I & III (firmness + strength)
- Elastin (elasticity + recoil)
- Glycosaminoglycans (hydration + plumpness)
- Matrix proteins (support network)
- Growth factors (healing signals)
When fibroblasts are healthy:
- wounds heal faster
- fine lines fade
- texture improves
- structure becomes firmer
- scars flatten
AGEING AFFECTS FIBROBLASTS SEVERELY
After age 25:
- fibroblasts become smaller
- their energy (ATP) declines
- collagen production slows
- the ECM becomes fragmented
- elastin becomes disorganised
- damaged fibroblasts replicate weakly
This is why ageing accelerates after 30–35.
KERATINOCYTES: “THE SURFACE RENEWAL SYSTEM”
Keratinocytes repair and regenerate the epidermis.
Their job:
- rebuild the surface
- restore barrier proteins
- close breaks in the skin
- shed pigment
- create a smooth, even texture
Keratinocyte turnover controls:
- glow
- pigmentation fading
- smoothness
- brightness
- softness
- hydration
AGEING IMPACT
With age:
- keratinocyte turnover slows
- pigment stays longer
- texture looks uneven
- healing slows
- surface dullness becomes constant
- barrier recovers more slowly
This is why marks linger for weeks rather than days.
GROWTH FACTORS (THE ORDER-GIVERS)
Growth factors are the “commands” that tell cells what to do.
Key growth factors:
- TGF-β → controls collagen building
- EGF → increases renewal + healing
- VEGF → blood vessel formation
- PDGF → recruits fibroblasts
- FGF → elasticity + hydration
- IGF → accelerates repair
- KGF → strengthens the epidermis
AGEING IMPACT
Growth factor signalling weakens:
- fewer signals → slower renewal
- weaker collagen rebuilding
- less elastin repair
- poorer wound quality
- higher risk of scarring
- pigment persists longer
EXTRACELLULAR MATRIX (ECM): “THE SKIN’S INTERNAL SCAFFOLD”
The ECM is the support network that holds everything together.
It includes:
- collagen
- elastin
- hyaluronic acid
- proteoglycans
- water
- structural proteins
Environmental ageing, UV and inflammation damage the ECM through:
- fragmentation
- dehydration
- stiffening (glycation)
- inflammation
- oxidative stress
A weak ECM = sagging, wrinkles, dullness, poor healing.
WOUND HEALING GENETICS
Healing is controlled by gene expression.
Key healing genes:
- COL1A1/COL1A2 → collagen formation
- HAS2 → hyaluronic acid production
- ELN → elastin formation
- MMPs → collagen breakdown
- TIMPs → inhibit MMPs
- IL-1, IL-6, TNF → inflammation
- MITF → pigment regulation
AGEING = GENE BEHAVIOUR CHANGES
With ageing:
- collagen genes decrease
- elastin genes become unstable
- MMP genes increase (more breakdown)
- pigment genes over-activate
- inflammation genes stay elevated
- antioxidant genes weaken
All of this slows repair and increases visible ageing.
ANGIOGENESIS (BLOOD VESSEL FORMATION)
Healthy healing requires new blood vessels.
Angiogenesis:
- delivers oxygen
- brings nutrients
- supports fibroblast activity
- speeds wound closure
- removes waste
- reduces risk of scarring
With age:
- angiogenesis becomes slower
- oxygen delivery drops
- healing weakens
- scars worsen
- pigment becomes darker over scars
This is why older skin heals differently.
MITOCHONDRIA & REGENERATION
Healing requires energy.
Mitochondria supply ATP — the currency cells use for repair.
When ATP is low:
- healing slows
- fibroblasts work poorly
- pigment stays longer
- inflammation lasts
- scar risk increases
- renewal slows
- texture worsens
LED + RF + HIFU all restore mitochondrial capacity.
AGE, HORMONES & RENEWAL
Female Biology
Perimenopause → major repair decline:
- less oestrogen → weaker collagen
- slower healing
- pigment more reactive
- barrier more fragile
- higher PIH risk
Male Biology
Men retain collagen longer but:
- environmental oxidation is higher
- sebum oxidation affects healing
- sudden deep wrinkles form later
Transgender Clients
Oestrogen therapy:
- increases melanocyte sensitivity
- increases vascular activity
- increases hydration needs
- slows barrier recovery
Testosterone therapy:
- increases inflammation → slower healing
- increases PIH risk
- thickens dermis → deeper scars
Aeternitas protocols must adjust per biological profile.
The Art of Scientific Aesthetics
Frequently Asked Questions
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It is a long established fact that a read will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more or less.
It is a long established fact that a read will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more or less.
It is a long established fact that a read will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more or less.
It is a long established fact that a read will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more or less.
