Yoon, Dong Suk Lee, Kyoung-Mi Kim, Sung-Hwan Kim, Su Hee Jung, Youngmee Kim, Soo Hyun Park, Kwang Hwan Choi, Yoorim Ryu, Hyun Aae Choi, Woo Jin Lee, Jin Woo 2024-01-20T05:01:37Z 2024-01-20T05:01:37Z 2021-09-05 2016-02-01 1937-3341 https://pubs.kist.re.kr/handle/201004/124410 The objective of this study was to determine whether a biphasic scaffold loaded with a combination of a chemokine and bone marrow concentrate (BMC) could improve tissue regeneration in knee articular cartilage of beagles with cylindrical osteochondral defects. For this investigation, an osteochondral defect (6mm in diameter and 8mm deep) was created in the weight-bearing articular surface of the femoral medial condyle in beagles. Bone marrow was aspirated from the posterior iliac crests of beagles to obtain mesenchymal stem cells (MSCs) for in vitro assay. Hematoxylin and eosin (HE), Masson's trichrome (MT), safranin O/fast green staining, and immunohistochemistry were performed for histological analysis. Quantitative real-time polymerase chain reaction was performed to understand the roles of BMC in chondrogenic differentiation of MSCs. At 12 weeks after transplantation of biphasic scaffolds, we observed that interleukin-8 (IL-8) or the combination of IL-8 and BMC induced massive bone regeneration compared to saline, BMC only, and MSCs. In gross appearance, the osteochondral defect site was nearly completely filled with repair tissue in the group that received the combination of IL-8 and BMC but not in the other groups. Moreover, histological analysis showed obvious differences in cartilage regeneration among groups. HE and MT staining showed that the cartilage defect sites of the group receiving the combination of IL-8 and BMC were regenerated with cartilage-like tissues showing chondrocyte morphology. Safranin O staining showed hyaline cartilage regeneration in the group receiving IL-8 and BMC, whereas fibrous-like tissues were formed in the other groups. Furthermore, immunostaining revealed the presence of type II collagen and aggrecan in regenerated cartilage tissue of the group receiving IL-8 and BMC, whereas regenerated cartilage tissues of the other groups weakly expressed type II collagen and aggrecan. These results indicate that the combination of a chemokine IL-8 and BMC has significant positive effects on osteochondral regeneration in a beagle model through enhancing expression of the chondrogenic transcription factors and markers such as Sox9 and type II collagen. English MARY ANN LIEBERT, INC MESENCHYMAL STEM-CELLS BETA-TRICALCIUM PHOSPHATE ARTICULAR-CARTILAGE GROWTH-FACTORS ANIMAL-MODELS CLINICAL-USE FACTOR-I DEFECTS REPAIR CHONDROCYTE Synergistic Action of IL-8 and Bone Marrow Concentrate on Cartilage Regeneration Through Upregulation of Chondrogenic Transcription Factors Article 10.1089/ten.tea.2015.0425 1 TISSUE ENGINEERING PART A, v.22, no.3-4, pp.363 - 374 TISSUE ENGINEERING PART A 22 3-4 363 374 scie scopus 000369987900018 2-s2.0-84959038426 Cell & Tissue Engineering Cell Biology Engineering, Biomedical Materials Science, Biomaterials Cell Biology Engineering Materials Science Article MESENCHYMAL STEM-CELLS BETA-TRICALCIUM PHOSPHATE ARTICULAR-CARTILAGE GROWTH-FACTORS ANIMAL-MODELS CLINICAL-USE FACTOR-I DEFECTS REPAIR CHONDROCYTE