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What is cell therapy?
Cell therapy involves introducing or modifying cells to treat diseases. Recently, authorized treatments like CAR T-cell therapies have made strides in targeting blood cancers. While most cell therapy products are administered intravenously, the local delivery of cells, via injection into or nearby the treatment site, shows potential to treat conditions such as spinal cord injuries, regenerate ischemic tissues, and halt the progression of Parkinson’s disease.
The challenges of localized cell delivery
Key challenges for local administration of cells include uniform delivery, maintaining cell viability, and retaining cells at the administration site—critical factors for successful local and regional cell therapies.1
Gelatin for cell therapy
Gelatin has a history of safe use in medical applications [link to the blog]. Ultra-purified gelatin such as Rousselot X-Pure, free of pyrogens, will provide a pro-regenerative environment for cells.2 Unlike synthetic hydrogels such as polyethylene glycol3 or natural biomaterials such as alginate4, ultra-purified gelatin is not recognized as foreign by the immune system. Rousselot has developed injectable gels to improve cell viability and retention of cells after local administration.
STITCH hydrogel platform
Solving cell therapy challenges with STITCH
Preventing cell sedimentation
Protecting cells from shear-stress-induced damage during administration
Retaining cells at the site of injection
Improving cell viability post-injection
Even after delivery to the target site, significant cell loss can occur due to cell death or immune system removal. Cells may also experience anoikis, a type of programmed cell death triggered by detachment from the extracellular matrix.
Gelatin hydrogels contain RGD sequences (arginine, glycine, and aspartic acid) that mimic the extracellular matrix. Gelatin’s integrin binding sites promote cell adhesion. Additionally, Rousselot’s hydrogels offer temporary protection against macrophages, enhancing cell survival.
Links
Additional information
References
- Amer, M. H., Rose, F., Shakesheff, K. M., Modo, M., & White, L. J. (2017). Translational considerations in injectable cell-based therapeutics for neurological applications: concepts, progress and challenges. NPJ Regen Med, 2, 23. https://doi.org/10.1038/s41536-017-0028-x
- Heinrich MA, Heinrich L, Ankone MJK, Vergauwen B, Prakash J. Endotoxin contamination alters macrophage-cancer cell interaction and therapeutic efficacy in pre-clinical 3D in vitro models. Biomater Adv. 2023 Jan;144:213220. doi: 10.1016/j.bioadv.2022.213220. Epub 2022 Nov 26. PMID: 36476713.
- Isaac, A.H., Recalde Phillips, S.Y., Ruben, E. et al. Impact of PEG sensitization on the efficacy of PEG hydrogel-mediated tissue engineering. Nat Commun 15, 3283 (2024). https://doi.org/10.1038/s41467-024-46327-3.
- Yang D, Jones KS. Effect of alginate on innate immune activation of macrophages. J Biomed Mater Res A. 2009 Aug;90(2):411-8. doi: 10.1002/jbm.a.32096. PMID: 18523947. https://pubmed.ncbi.nlm.nih.gov/18523947/.