Journal article
Thiolated bone and tendon tissue particles covalently bound in hydrogels for in vivo calvarial bone regeneration
Acta biomaterialia, Vol.104, pp.66-75
03/01/2020
DOI: 10.1016/j.actbio.2019.12.035
PMID: 31904561
Abstract
Bone regeneration of large cranial defects, potentially including traumatic brain injury (TBI) treatment, presents a major problem with non-crosslinking, clinically available products due to material migration outside the defect. Commercial products such as bone cements are permanent and thus not conducive to bone regeneration, and typical commercial bioactive materials for bone regeneration do not crosslink. Our previous work demonstrated that non-crosslinking materials may be prone to material migration following surgical placement, and the current study attempted to address these problems by introducing a new hydrogel system where tissue particles are themselves the crosslinker. Specifically, a pentenoate-modified hyaluronic acid (PHA) polymer was covalently linked to thiolated tissue particles of demineralized bone matrix (TDBM) or devitalized tendon (TDVT), thereby forming an interconnected hydrogel matrix for calvarial bone regeneration. All hydrogel precursor solutions exhibited sufficient yield stress for surgical placement and an adequate compressive modulus post-crosslinking. Critical-size calvarial defects were filled with a 4% PHA hydrogel containing 10 or 20% TDBM or TDVT, with the clinical product DBXⓇ being employed as the standard of care control for the in vivo study. At 12 weeks, micro-computed tomography analysis demonstrated similar bone regeneration among the experimental groups, TDBM and TDVT, and the standard of care control DBXⓇ. The group with 10% TDBM was therefore identified as an attractive material for potential calvarial defect repair, as it additionally exhibited a sufficient initial recovery after shearing (i.e., > 80% recovery). Future studies will focus on applying a hydrogel in a rat model for treatment of TBI.
Non-crosslinking materials may be prone to material migration from a calvarial bone defect following surgical placement, which is problematic for materials intended for bone regeneration. Unfortunately, typical crosslinking materials such as bone cements are permanent and thus not conducive to bone regeneration, and typical bioactive materials for bone regeneration such as tissue matrix are not crosslinked in commercial products. The current study addressed these problems by introducing a new biomaterial where tissue particles are themselves the crosslinker in a hydrogel system. The current study successfully demonstrated a new material based on pentenoate-modified hyaluronic acid with thiolated demineralized bone matrix that is capable of rapid crosslinking, with desirable paste-like rheology of the precursor material for surgical placement, and with bone regeneration comparable to a commercially available standard-of-care product. Such a material may hold promise for a single-surgery treatment of severe traumatic brain injury (TBI) following hemicraniectomy.
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Details
- Title: Subtitle
- Thiolated bone and tendon tissue particles covalently bound in hydrogels for in vivo calvarial bone regeneration
- Creators
- Jakob M Townsend - Stephenson School of Biomedical Engineering, University of Oklahoma, OK, United StatesGoksel Sali - Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United StatesHannah B Homburg - Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United StatesNina T Cassidy - Stephenson School of Biomedical Engineering, University of Oklahoma, OK, United StatesMegan E Sanders - Stephenson School of Biomedical Engineering, University of Oklahoma, OK, United StatesKar-Ming Fung - Department of Pathology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United StatesBrian T Andrews - Department of Plastic Surgery, University of Kansas Medical Center, Kansas City, KS, United StatesRandolph J Nudo - Department of Rehabilitation Medicine, University of Kansas Medical Center, Kansas City, KS, United StatesBradley N Bohnstedt - Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United StatesMichael S Detamore - Stephenson School of Biomedical Engineering, University of Oklahoma, OK, United States
- Resource Type
- Journal article
- Publication Details
- Acta biomaterialia, Vol.104, pp.66-75
- DOI
- 10.1016/j.actbio.2019.12.035
- PMID
- 31904561
- NLM abbreviation
- Acta Biomater
- ISSN
- 1742-7061
- eISSN
- 1878-7568
- Publisher
- Elsevier Ltd
- Grant note
- DOI: 10.13039/100007926, name: University of Oklahoma
- Language
- English
- Date published
- 03/01/2020
- Academic Unit
- Craniofacial Anomalies Research Center; Neurosurgery; Otolaryngology
- Record Identifier
- 9984107408502771
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