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dc.creatorAlvites, RD
dc.creatorBranquinho, MV
dc.creatorSousa, AC
dc.creatorAmorim, I
dc.creatorMagalhães, R
dc.creatorJoão, F
dc.creatorAlmeida, D
dc.creatorAmado, S
dc.creatorPrada, J
dc.creatorPires, I
dc.creatorZen, F
dc.creatorRaimondo, S
dc.creatorLuís, AL
dc.creatorGeuna, S
dc.creatorVarejão, ASP
dc.creatorMaurício, AC
dc.description.abstractPeripheral nerve injury remains a clinical challenge with severe physiological and functional consequences. Despite the existence of multiple possible therapeutic approaches, until now, there is no consensus regarding the advantages of each option or the best methodology in promoting nerve regeneration. Regenerative medicine is a promise to overcome this medical limitation, and in this work, chitosan nerve guide conduits and olfactory mucosa mesenchymal stem/stromal cells were applied in different therapeutic combinations to promote regeneration in sciatic nerves after neurotmesis injury. Over 20 weeks, the intervened animals were subjected to a regular functional assessment (determination of motor performance, nociception, and sciatic indexes), and after this period, they were evaluated kinematically and the sciatic nerves and cranial tibial muscles were evaluated stereologically and histomorphometrically, respectively. The results obtained allowed confirming the beneficial effects of using these therapeutic approaches. The use of chitosan NGCs and cells resulted in better motor performance, better sciatic indexes, and lower gait dysfunction after 20 weeks. The use of only NGGs demonstrated better nociceptive recoveries. The stereological evaluation of the sciatic nerve revealed identical values in the different parameters for all therapeutic groups. In the muscle histomorphometric evaluation, the groups treated with NGCs and cells showed results close to those of the group that received traditional sutures, the one with the best final values. The therapeutic combinations studied show promising outcomes and should be the target of new future works to overcome some irregularities found in the results and establish the combination of nerve guidance conduits and olfactory mucosa mesenchymal stem/stromal cells as viable options in the treatment of peripheral nerves after injury.
dc.description.sponsorshipThis research was supported by projects PEst-OE/AGR/UI0211/2011 from FCT and COMPETE 2020 from ANIProjetos ID&T Empresas em Copromoção, by the project “insitu.Biomas – Reinvent biomanufacturing systems by using an usability approach for in situ clinic temporary implants fabrication” with the reference POCI-01-0247-FEDER-017771, by the project “Print-on-Organs – Engineering bioinks and processes for direct printing on organs” with the reference POCI-01- 0247-FEDER-033877, and by the project “Bone2Move – Development of “in vivo” experimental techniques and modelling methodologies for the evaluation of 4D scaffolds for bone defect in sheep model: an integrative research approach” with the reference POCI-01-0145-FEDER-031146. Mariana Vieira Branquinho (SFRH/BD/146172/2019), Ana Catarina Sousa (SFRH/BD/146689/2019), and Rui Damásio Alvites (SFRH/BD/116118/2016) acknowledge FCT for the financial support. The Reaxon® NGCs used in this work were kindly provided by Medovent GmbH (Mainz, Germany).
dc.relationinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/PEst-OE%2FAGR%2FUI0211%2F2011/PT
dc.relation.ispartofStem Cells International, vol.2021:6613029
dc.titleCombined Use of Chitosan and Olfactory Mucosa Mesenchymal Stem/Stromal Cells to Promote Peripheral Nerve Regeneration in Vivo
dc.typeArtigo em Revista Científica Internacional
dc.contributor.uportoInstituto de Investigação e Inovação em Saúde
Appears in Collections:I3S - Artigo em Revista Científica Internacional

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