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Marchesini A, Raimondo S, Zingaretti N, Riccio V, Battiston B, Provinciali M, Geuna S, Riccio M. The amnion muscle combined graft (AMCG) conduits in nerves repair: an anatomical and experimental study on a rat model. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2018; 29:120. [PMID: 30032327 DOI: 10.1007/s10856-018-6126-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Accepted: 07/07/2018] [Indexed: 06/08/2023]
Abstract
The amnion muscle combined graft (AMCG) conduits showed good clinical results in peripheral nerves gap repair. It combines the human amniotic membrane with autologous skeletal muscle fibres. These results seem attributable to the biological characteristics of human amniotic membrane: Pluripotency, anti-inflammatory and low immunogenicity.We here evaluate the final outcome of nerve regeneration morphologically and functionally, across the AMCG compared to nerve autograft. Fourteen Wistar rats were divided into two groups: In Group A, including 6 rats, the left forelimb was treated performing a 1.5 cm length gap on median nerve that was then reconstructed with a reverse autograft. In Group B, including 8 rats, the gap was reconstructed with AMCG. Functional results were evaluated at 30, 60 and 90 days performing grasping tests. Morphological and stereological analyses were performed at T90 using high-resolution light microscopy and design-based stereology. The AMCG conduits revealed nerve fibres regeneration and functional recovery. Functional recovery was observed in both groups with AMCG conduits group showing lower values and a regeneration of median nerves with more myelinated fibres with the same axon size, but thinner myelin than the autograft group. Though the autograft remains the gold standard to restore wide nerve gaps, the AMCG conduit has proved to be effective in enabling nerve regeneration through a critical rat's nerve gap of 15 mm. These findings empirically support the great clinical results obtained using AMCG conduit to restore traumatic nerve's gap from 3 to 6 cm of mixed forearm nerves.
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Affiliation(s)
- Andrea Marchesini
- Department of Reconstructive Plastic Surgery - Hand Surgery, Azienda Ospedaliero - Universitaria Ospedali Riuniti di Ancona, Ancona, (AN), Italy.
| | - Stefania Raimondo
- Department of Clinical and Biological Sciences, Neuroscience Institute Cavalieri Ottolenghi, University of Torino, Orbassano, (TO), Italy
| | - Nicola Zingaretti
- Department of Plastic and Reconstructive Surgery, University of Udine, Ospedale "S. Maria della Misericordia", Udine, (UD), Italy
| | - Valentina Riccio
- Department of Veterinary Medicine, School of Veterinary Surgery, Ospedale Veterinario Didattico San Sollecito, University of Camerino, Matelica, Italy
| | - Bruno Battiston
- Department of Orthopedics and Traumatology - Hand surgery Unit, C.T.O. Hospital, Torino, (TO), Italy
| | - Mauro Provinciali
- Advanced Technology Center for Aging Research, Scientific Technological Area, IRCCS-INRCA, Experimental Animal Models for Aging Unit, Scientific Technological Area, IRCCS-INRCA, Via Birarelli 8, Ancona, 60121, Italy
| | - Stefano Geuna
- Department of Clinical and Biological Sciences, Neuroscience Institute Cavalieri Ottolenghi, University of Torino, Orbassano, (TO), Italy
| | - Michele Riccio
- Department of Reconstructive Plastic Surgery - Hand Surgery, Azienda Ospedaliero - Universitaria Ospedali Riuniti di Ancona, Ancona, (AN), Italy
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Fast in silico assessment of physical stress for peripheral nerves. Med Biol Eng Comput 2018; 56:1541-1551. [DOI: 10.1007/s11517-018-1794-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Accepted: 01/22/2018] [Indexed: 12/24/2022]
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