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Adipose micro‐grafts enhance tendinopathy healing in ovine model: An in vivo experimental perspective study

In Europe, approximatively 100 000 to 500 000 tendon repairs are performed every year. These procedures are associated with a considerable rate of postoperative complications (from 6% to 11%). Autologous micro‐grafts (AAMG) and stromal vascular fraction (SVF) have been shown to improve tendon healin...

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Autores principales: Palumbo Piccionello, Angela, Riccio, Valentina, Senesi, Letizia, Volta, Antonella, Pennasilico, Luca, Botto, Riccardo, Rossi, Giacomo, Tambella, Adolfo Maria, Galosi, Livio, Marini, Carlotta, Vullo, Cecilia, Gigante, Antonio, Zavan, Barbara, De Francesco, Francesco, Riccio, Michele
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley & Sons, Inc. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8550708/
https://www.ncbi.nlm.nih.gov/pubmed/34398527
http://dx.doi.org/10.1002/sctm.20-0496
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author Palumbo Piccionello, Angela
Riccio, Valentina
Senesi, Letizia
Volta, Antonella
Pennasilico, Luca
Botto, Riccardo
Rossi, Giacomo
Tambella, Adolfo Maria
Galosi, Livio
Marini, Carlotta
Vullo, Cecilia
Gigante, Antonio
Zavan, Barbara
De Francesco, Francesco
Riccio, Michele
author_facet Palumbo Piccionello, Angela
Riccio, Valentina
Senesi, Letizia
Volta, Antonella
Pennasilico, Luca
Botto, Riccardo
Rossi, Giacomo
Tambella, Adolfo Maria
Galosi, Livio
Marini, Carlotta
Vullo, Cecilia
Gigante, Antonio
Zavan, Barbara
De Francesco, Francesco
Riccio, Michele
author_sort Palumbo Piccionello, Angela
collection PubMed
description In Europe, approximatively 100 000 to 500 000 tendon repairs are performed every year. These procedures are associated with a considerable rate of postoperative complications (from 6% to 11%). Autologous micro‐grafts (AAMG) and stromal vascular fraction (SVF) have been shown to improve tendon healing in 60% to 70% of treated rodents. The purpose of this study was to evaluate the effects of AAMG in a sheep model with tendinopathy. We used sheep models because, as a large animal, they are more comparable to humans. The hypothesis was that SVF injection would improve tendon healing compared with the control group, reducing inflammatory and matrix degrading, while increasing anti‐inflammatory expression and collagen synthesis in the early stage of tendon injury. Sixteen Apennine sheep aged 2 to 5 years underwent 500 UI type I collagenase injection into both common calcaneal tendons (CCT) to induce tendinopathy. After 15 days (T0), one CCT in every ovine underwent randomly to 2.5 mL of AAMG obtained by mechanical disruption and the contralateral CCTs received no treatment. Clinical, ecographic, and sonographic evaluations were performed after 4 weeks (T1) and 8 weeks (T2). Histological, immunohistochemical, real‐time polymerase chain reaction (RT‐PCR), and biomechanical evaluations were performed at T2. At T2, the treated group showed a final tendon diameter (9.1 ± 1.4 mm) and a hardness expression (62%) that were similar to the original healthy tendon (8.1 ± 1.1 mm; 100%), with a significant recovery compared with the control group (9.5 ± 1.7 mm; 39%). Moreover, histological analysis of the treated group revealed an improvement in the fiber orientation score, fiber edema score, infiltrative‐inflammatory process, and necrosis score (4.3 ± 3.3) compared with control group (8.8 ± 2.9). Immunohistochemically, the treated group showed high expression of collagen 1, Factor VIII and significantly low expression of collagen 3. These data were confirmed by RT‐PCR analysis. The study findings suggested that AAMGs obtained through mechanical disruption present a safe, efficient, and reliable technique, enhancing tendon healing.
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spelling pubmed-85507082021-11-04 Adipose micro‐grafts enhance tendinopathy healing in ovine model: An in vivo experimental perspective study Palumbo Piccionello, Angela Riccio, Valentina Senesi, Letizia Volta, Antonella Pennasilico, Luca Botto, Riccardo Rossi, Giacomo Tambella, Adolfo Maria Galosi, Livio Marini, Carlotta Vullo, Cecilia Gigante, Antonio Zavan, Barbara De Francesco, Francesco Riccio, Michele Stem Cells Transl Med Tissue Engineering and Regenerative Medicine In Europe, approximatively 100 000 to 500 000 tendon repairs are performed every year. These procedures are associated with a considerable rate of postoperative complications (from 6% to 11%). Autologous micro‐grafts (AAMG) and stromal vascular fraction (SVF) have been shown to improve tendon healing in 60% to 70% of treated rodents. The purpose of this study was to evaluate the effects of AAMG in a sheep model with tendinopathy. We used sheep models because, as a large animal, they are more comparable to humans. The hypothesis was that SVF injection would improve tendon healing compared with the control group, reducing inflammatory and matrix degrading, while increasing anti‐inflammatory expression and collagen synthesis in the early stage of tendon injury. Sixteen Apennine sheep aged 2 to 5 years underwent 500 UI type I collagenase injection into both common calcaneal tendons (CCT) to induce tendinopathy. After 15 days (T0), one CCT in every ovine underwent randomly to 2.5 mL of AAMG obtained by mechanical disruption and the contralateral CCTs received no treatment. Clinical, ecographic, and sonographic evaluations were performed after 4 weeks (T1) and 8 weeks (T2). Histological, immunohistochemical, real‐time polymerase chain reaction (RT‐PCR), and biomechanical evaluations were performed at T2. At T2, the treated group showed a final tendon diameter (9.1 ± 1.4 mm) and a hardness expression (62%) that were similar to the original healthy tendon (8.1 ± 1.1 mm; 100%), with a significant recovery compared with the control group (9.5 ± 1.7 mm; 39%). Moreover, histological analysis of the treated group revealed an improvement in the fiber orientation score, fiber edema score, infiltrative‐inflammatory process, and necrosis score (4.3 ± 3.3) compared with control group (8.8 ± 2.9). Immunohistochemically, the treated group showed high expression of collagen 1, Factor VIII and significantly low expression of collagen 3. These data were confirmed by RT‐PCR analysis. The study findings suggested that AAMGs obtained through mechanical disruption present a safe, efficient, and reliable technique, enhancing tendon healing. John Wiley & Sons, Inc. 2021-08-16 /pmc/articles/PMC8550708/ /pubmed/34398527 http://dx.doi.org/10.1002/sctm.20-0496 Text en © 2021 The Authors. stem cells translational medicine published by Wiley Periodicals LLC on behalf of AlphaMed Press. https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ (https://creativecommons.org/licenses/by-nc-nd/4.0/) License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.
spellingShingle Tissue Engineering and Regenerative Medicine
Palumbo Piccionello, Angela
Riccio, Valentina
Senesi, Letizia
Volta, Antonella
Pennasilico, Luca
Botto, Riccardo
Rossi, Giacomo
Tambella, Adolfo Maria
Galosi, Livio
Marini, Carlotta
Vullo, Cecilia
Gigante, Antonio
Zavan, Barbara
De Francesco, Francesco
Riccio, Michele
Adipose micro‐grafts enhance tendinopathy healing in ovine model: An in vivo experimental perspective study
title Adipose micro‐grafts enhance tendinopathy healing in ovine model: An in vivo experimental perspective study
title_full Adipose micro‐grafts enhance tendinopathy healing in ovine model: An in vivo experimental perspective study
title_fullStr Adipose micro‐grafts enhance tendinopathy healing in ovine model: An in vivo experimental perspective study
title_full_unstemmed Adipose micro‐grafts enhance tendinopathy healing in ovine model: An in vivo experimental perspective study
title_short Adipose micro‐grafts enhance tendinopathy healing in ovine model: An in vivo experimental perspective study
title_sort adipose micro‐grafts enhance tendinopathy healing in ovine model: an in vivo experimental perspective study
topic Tissue Engineering and Regenerative Medicine
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8550708/
https://www.ncbi.nlm.nih.gov/pubmed/34398527
http://dx.doi.org/10.1002/sctm.20-0496
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