Abstract:
BACKGROUND:Because the regenerative ability of intervertebral discs (IVDs) is restricted, defects caused by discectomy may induce insufficient tissue repair leading to further IVD degeneration. An acellular bioresorbable biomaterial based on ultra-purified alginate (UPAL) gel was developed to fill the IVD cavity and prevent IVD degeneration. However, an acellular matrix-based strategy may have limitations, particularly in the elderly population, who exhibit low self-repair capability. Therefore, further translational studies involving product combinations, such as UPAL gel plus bone marrow-derived mesenchymal stem cells (BMSCs), are required to evaluate the regenerative effects of BMSCs embedded in UPAL gel on degenerated IVDs. METHODS:Rabbit BMSCs and nucleus pulposus cells (NPCs) were co-cultured in a three-dimensional (3D) system in UPAL gel. In addition, rabbit or human BMSCs combined with UPAL gel were implanted into IVDs following partial discectomy in rabbits with degenerated IVDs. FINDINGS:Gene expression of NPC markers, growth factors, and extracellular matrix was significantly increased in the NPC and BMSC 3D co-culture compared to that in each 3D mono-culture. In vivo, whereas UPAL gel alone suppressed IVD degeneration as compared to discectomy, the combination of BMSCs and UPAL gel exerted a more potent effect to induce IVD regeneration. Similar IVD regeneration was observed using human BMSCs. INTERPRETATION:These findings demonstrate the therapeutic potential of BMSCs combined with UPAL gel as a regenerative strategy following discectomy for degenerated IVDs. FUNDING:Ministry of Education, Culture, Sports, Science, and Technology of Japan, Japan Agency for Medical Research and Development, and the Mochida Pharmaceutical Co., Ltd.
journal_name
EBioMedicinejournal_title
EBioMedicineauthors
Ukeba D,Sudo H,Tsujimoto T,Ura K,Yamada K,Iwasaki Ndoi
10.1016/j.ebiom.2020.102698subject
Has Abstractpub_date
2020-03-01 00:00:00pages
102698issn
2352-3964pii
S2352-3964(20)30073-6journal_volume
53pub_type
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