Cell therapy for skin wound using fibroblast encapsulated poly(ethylene glycol)-poly(L-alanine) thermogel

Eun Jung Yun, Bora Yon, Min Kyung Joo, Byeongmoon Jeong

Research output: Contribution to journalArticlepeer-review

81 Scopus citations


As a new application of a thermogel, a poly- (ethylene glycol)-b-poly(L- alanine) (PEG-L-PA) gel encapsulating fibroblasts was investigated for wound healing. The fibroblasts were encapsulated by the temperature sensitive sol-to-gel transition of the polymer aqueous solution. Under the in vitro three-dimensional (3D) cell culture condition, the PEG-L-PA thermogel was comparable with Matrigel for cell proliferation and was significantly better than Matrigel for collagen types I and III formation. After confirming the excellent 3D microenvironment of the PEG-L-PA thermogel for fibroblasts, in vivo wound healing was investigated by injecting the cell-suspended polymer aqueous solution on incisions of rat skin, where the cell-encapsulated gel was formed in situ. Compared with the phosphate buffered saline treated system and the cell-free PEG-L-PA thermogel, the cell-encapsulated PEG-L-PA thermogel not only accelerated the wound closure but also improved epithelialization and the formation of skin appendages such as keratinocyte layer (epidermis), hair follicles, and sebaceous glands. The results demonstrate the potential of thermogels for cell therapy as an injectable tissue-engineering scaffold.

Original languageEnglish
Pages (from-to)1106-1111
Number of pages6
Issue number4
StatePublished - 9 Apr 2012


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