Question

List three or four medical conditions for which engineered tissue or stem cells are currently being used:

Answer 1

Here are four medical conditions in which engineered tissues or stem-cell therapies are currently used clinically or in late-stage trials:

1. Hematologic cancers and blood disorders (leukemia, lymphoma, aplastic anemia)
- Use: Hematopoietic stem cell transplantation (bone marrow or peripheral blood stem cells) to restore blood- and immune-system function after myeloablative therapy.
- Status: Standard, widely used therapy.

2. Severe burns and chronic nonhealing wounds
- Use: Bioengineered skin substitutes and cultured epithelial autografts (e.g., Apligraf, Dermagraft, cultured keratinocyte sheets) to close large defects and promote healing.
- Status: FDA-approved products and routine clinical use.

3. Corneal epithelial stem-cell deficiency (ocular surface disease)
- Use: Limbal stem-cell transplantation (autologous or allogeneic) and cultured limbal epithelial grafts to restore the corneal surface and vision.
- Status: Clinical therapy in many centers; some products/protocols are standardized.

4. Cartilage defects/osteoarthritis (focal articular cartilage lesions)
- Use: Autologous chondrocyte implantation (ACI/MACI) and investigational mesenchymal stem cell–based implants to regenerate cartilage.
- Status: ACI/MACI is an established treatment for focal defects; MSC approaches are in clinical use or trials.

If you want, I can add other examples (e.g., retinal pigment epithelium for macular degeneration, MSCs for graft-versus-host disease) or give references for any of these.