Open AccessDevelopment of a stem cell spheroid‐laden patch with high retention at skin wound site
Author(s) -
Jeong GunJae,
Im GwangBum,
Lee TaeJin,
Kim SungWon,
Jeon Hye Ran,
Lee DongHyun,
Baik Sangyul,
Pang Changhyun,
Kim TaeHyung,
Kim DongIk,
Jang Young Charles,
Bhang Suk Ho
Publication year - 2022
Publication title -
bioengineering and translational medicine
Language(s) - English
Resource type - Journals
ISSN - 2380-6761
DOI - 10.1002/btm2.10279
Subject(s) - homing (biology) , stem cell , spheroid , mesenchymal stem cell , wound healing , paracrine signalling , cell , microbiology and biotechnology , viability assay , regeneration (biology) , drug delivery , biomedical engineering , chemistry , cell culture , materials science , biology , medicine , immunology , nanotechnology , biochemistry , ecology , receptor , genetics
Mesenchymal stem cells such as human adipose tissue‐derived stem cells (hADSCs) have been used as a representative therapeutic agent for tissue regeneration because of their high proliferation and paracrine factor‐secreting abilities. However, certain points regarding conventional ADSC delivery systems, such as low cell density, secreted cytokine levels, and cell viability, still need to be addressed for treating severe wounds. In this study, we developed a three‐dimensional (3D) cavity‐structured stem cell‐laden system for overdense delivery of cells into severe wound sites. Our system includes a hydrophobic surface and cavities that can enhance the efficiency of cell delivery to the wound site. In particular, the cavities in the system facilitate hADSC spheroid formation, increasing therapeutic growth factor expression compared with 2D cultured cells. Our hADSC spheroid‐loaded patch exhibited remarkably improved cell localization at the wound site and dramatic therapeutic efficacy compared to the conventional cell injection method. Taken together, the hADSC spheroid delivery system focused on cell delivery, and stem cell homing effect at the wound site showed a significantly enhanced wound healing effect. By overcoming the limitations of conventional cell delivery methods, our overdense cell delivery system can contribute to biomedical and clinical applications.