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Chronic wounds that will not close: how exosomes and stem cell factors help

Pressure sores, diabetic ulcers and venous wounds

Quick answer

A chronic wound is one that has not healed in 4-6 weeks, usually because of poor perfusion, infection or stalled inflammation. Exosomes and stem cell secreted factors carry growth signals that encourage capillary and collagen formation — but only alongside standard wound care.

Key facts

Definition
Unhealed at 4-6 weeks
Non-negotiable
Debride, infection control, offloading
Exosome
Cell-derived signalling vesicle
Main risk
Progression to amputation

Wound care fundamentals

The non-negotiables in chronic wound care are offloading pressure, debriding dead tissue, controlling infection and assessing limb perfusion. If arterial flow is too poor, no growth factor will close the wound.

What exosomes are and how they help

Exosomes are tiny vesicles cells release to communicate, carrying proteins and RNA that change how neighbouring cells behave. Practically, they are not living cells, which makes storage and standardisation easier in some settings.

Diabetic foot ulcers need urgency

Diabetic patients with a foot ulcer should be assessed by a wound team first: a delay of even a few weeks meaningfully raises amputation risk. Adjunct options should support the plan, never postpone the main treatment.

Frequently asked questions

  • Can exosomes replace stem cells?

    Not exactly — they deliver signals but no cells that adapt to the environment; treat them as different tools.

  • Can they be used on infected wounds?

    Infection must be controlled first, otherwise tissue stimulation will not work.

  • What is Chronic wounds that will not close: how exosomes and stem cell factors help?

    A chronic wound is one that has not healed in 4-6 weeks, usually because of poor perfusion, infection or stalled inflammation. Exosomes and stem cell secreted factors carry growth signals that encourage capillary and collagen formation — but only alongside standard wound care.

  • Chronic wounds that will not close: how exosomes and stem cell factors help: what is the definition?

    Definition: Unhealed at 4-6 weeks

Medical cautions

5 points • reviewed 2026-08-28

Expand
  • This article is educational information only — not a diagnosis, prescription, or personal medical advice.
  • Outcomes vary by person, depending on age, underlying conditions, current medication, and the treating doctor's technique.
  • Consult a licensed physician and verify the clinic's licence before deciding on any treatment.
  • Some treatments (certain stem cell therapies in particular) are regulated differently by country — check Thai and Korean rules before travelling.
  • Prices, packages, and service details can change — confirm directly with the provider before paying.

Reviewed and last updated: 2026-08-28

References and sources

10 sources • every claim is traceable

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  1. 1. EHL Bio — company introduction

    https://www.ehlbio.co.kr/company/about/

  2. 2. EHL Bio — company history

    https://www.ehlbio.co.kr/company/history/

  3. 3. EHL Bio — GMP centre

    https://www.ehlbio.co.kr/rd/gmp/

  4. 4. EHL Bio — stem cell therapeutics pipeline

    https://www.ehlbio.co.kr/rd/institute/

  5. 5. EHL Bio — patents and research papers

    https://www.ehlbio.co.kr/rd/patent/

  6. 6. EHL Bio — EHL-STEM conditioned media

    https://www.ehlbio.co.kr/conditioned/

  7. 7. EHL Bio — immune cells

    https://www.ehlbio.co.kr/immune_cell/

  8. 8. EHL Bio — target diseases

    https://www.ehlbio.co.kr/cure/index/

  9. 9. EHL Bio — locations and contact

    https://www.ehlbio.co.kr/company/contact/

  10. 10. Original article on khunkim.com (pre-migration)

    https://www.ehlbio.co.kr

Browse the full reference library →

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Last updated: 2026-08-28 · This content is for information only and is not medical advice. Consult a qualified doctor before making treatment decisions.

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