Erratum: Longitudinal in vivo evaluation of bone regeneration by combined measurement of multi-pinhole SPECT and micro-CT for tissue engineering

Abstract Over the last decades, great strides were made in the development of novel implants for the treatment of bone defects. The increasing versatility and complexity of these implant designs request for concurrent advances in means to assess in vivo the course of induced bone formation in preclinical models. Since its discovery, micro-computed tomography (micro-CT) has excelled as powerful high-resolution technique for non-invasive assessment of newly formed bone tissue. However, micro-CT fails to provide spatiotemporal information on biological processes ongoing during bone regeneration. Conversely, due to the versatile applicability and cost-effectiveness, single photon emission computed tomography (SPECT) would be an ideal technique for assessing such biological processes with high sensitivity and for nuclear imaging comparably high resolution (<1 mm). Herein, we employ modular designed poly(ethylene glycol)-based hydrogels that release bone morphogenetic protein to guide the healing of critical sized calvarial bone defects. By combined in vivo longitudinal multi-pinhole SPECT and micro-CT evaluations we determine the spatiotemporal course of bone formation and remodeling within this synthetic hydrogel implant. End point evaluations by high resolution micro-CT and histological evaluation confirm the value of this approach to follow and optimize bone-inducing biomaterials.

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Graphene and its Derivatives for Bone Tissue Engineering: In Vitro and In Vivo Evaluation of Graphene-Based Scaffolds, Membranes and Coatings

Frontiers in Bioengineering and Biotechnology ◽

10.3389/fbioe.2021.734688 ◽

2021 ◽

Vol 9 ◽

Author(s):

Junyao Cheng ◽

Jianheng Liu ◽

Bing Wu ◽

Zhongyang Liu ◽

Ming Li ◽

...

Keyword(s):

Tissue Engineering ◽

Regenerative Medicine ◽

Bone Tissue Engineering ◽

Bone Regeneration ◽

Bone Tissue ◽

Bone Grafts ◽

Biological Properties ◽

In Vivo Evaluation

Bone regeneration or replacement has been proved to be one of the most effective methods available for the treatment of bone defects caused by different musculoskeletal disorders. However, the great contradiction between the large demand for clinical therapies and the insufficiency and deficiency of natural bone grafts has led to an urgent need for the development of synthetic bone graft substitutes. Bone tissue engineering has shown great potential in the construction of desired bone grafts, despite the many challenges that remain to be faced before safe and reliable clinical applications can be achieved. Graphene, with outstanding physical, chemical and biological properties, is considered a highly promising material for ideal bone regeneration and has attracted broad attention. In this review, we provide an introduction to the properties of graphene and its derivatives. In addition, based on the analysis of bone regeneration processes, interesting findings of graphene-based materials in bone regenerative medicine are analyzed, with special emphasis on their applications as scaffolds, membranes, and coatings in bone tissue engineering. Finally, the advantages, challenges, and future prospects of their application in bone regenerative medicine are discussed.

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Decellularized bone extracellular matrix in skeletal tissue engineering

Biochemical Society Transactions ◽

10.1042/bst20190079 ◽

2020 ◽

Vol 48 (3) ◽

pp. 755-764

Author(s):

Benjamin B. Rothrauff ◽

Rocky S. Tuan

Keyword(s):

Tissue Engineering ◽

Bone Regeneration ◽

Tissue Regeneration ◽

Animal Studies ◽

Tumor Resection ◽

Regenerative Capacity ◽

Skeletal Tissue ◽

Large Bone

Bone possesses an intrinsic regenerative capacity, which can be compromised by aging, disease, trauma, and iatrogenesis (e.g. tumor resection, pharmacological). At present, autografts and allografts are the principal biological treatments available to replace large bone segments, but both entail several limitations that reduce wider use and consistent success. The use of decellularized extracellular matrices (ECM), often derived from xenogeneic sources, has been shown to favorably influence the immune response to injury and promote site-appropriate tissue regeneration. Decellularized bone ECM (dbECM), utilized in several forms — whole organ, particles, hydrogels — has shown promise in both in vitro and in vivo animal studies to promote osteogenic differentiation of stem/progenitor cells and enhance bone regeneration. However, dbECM has yet to be investigated in clinical studies, which are needed to determine the relative efficacy of this emerging biomaterial as compared with established treatments. This mini-review highlights the recent exploration of dbECM as a biomaterial for skeletal tissue engineering and considers modifications on its future use to more consistently promote bone regeneration.

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In Vitro and In Vivo Evaluation of a Three-Dimensional Porous Multi-Walled Carbon Nanotube Scaffold for Bone Regeneration

Nanomaterials ◽

10.3390/nano7020046 ◽

2017 ◽

Vol 7 (2) ◽

pp. 46 ◽

Cited By ~ 16

Author(s):

Manabu Tanaka ◽

Yoshinori Sato ◽

Mei Zhang ◽

Hisao Haniu ◽

Masanori Okamoto ◽

...

Keyword(s):

Carbon Nanotube ◽

Bone Regeneration ◽

Three Dimensional ◽

In Vivo Evaluation ◽

Multi Walled Carbon Nanotube

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In Vitro and In Vivo Evaluation of a nHA/PA66 Composite Membrane for Guided Bone Regeneration

Journal of Biomaterials Science Polymer Edition ◽

10.1163/092050609x12602753096279 ◽

2011 ◽

Vol 22 (1-3) ◽

pp. 263-275 ◽

Cited By ~ 15

Author(s):

Jidong Li ◽

Yi Man ◽

Yi Zuo ◽

Li Zhang ◽

Cui Huang ◽

...

Keyword(s):

Bone Regeneration ◽

Composite Membrane ◽

Guided Bone Regeneration ◽

In Vivo Evaluation

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In vivo evaluation of bone regeneration behavior of novel β ‐tricalcium phosphate/layered double hydroxide nanocomposite granule as bone graft substitutes

Journal of Biomedical Materials Research Part B Applied Biomaterials ◽

10.1002/jbm.b.34973 ◽

2021 ◽

Author(s):

Neda Eskandari ◽

Seyedeh Sara Shafiei ◽

Mohammad Mehdi Dehghan ◽

Saeed Farzad‐Mohajeri

Keyword(s):

Bone Graft ◽

Bone Regeneration ◽

Layered Double Hydroxide ◽

Tricalcium Phosphate ◽

In Vivo Evaluation ◽

Bone Graft Substitutes ◽

Double Hydroxide

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In Vitro Physico-Chemical Characterization and Standardized In Vivo Evaluation of Biocompatibility of a New Synthetic Membrane for Guided Bone Regeneration

Materials ◽

10.3390/ma12071186 ◽

2019 ◽

Vol 12 (7) ◽

pp. 1186

Author(s):

Lívia da Costa Pereira ◽

Carlos Fernando de Almeida Barros Mourão ◽

Adriana Terezinha Neves Novellino Alves ◽

Rodrigo Figueiredo de Brito Resende ◽

Marcelo José Pinheiro Guedes de Uzeda ◽

...

Keyword(s):

Bone Regeneration ◽

Chemical Properties ◽

Chemical Characterization ◽

Guided Bone Regeneration ◽

Tissue Reaction ◽

In Vivo Evaluation ◽

Physico Chemical ◽

Tissue Reactions

This study’s aim was to evaluate the biocompatibility and bioabsorption of a new membrane for guided bone regeneration (polylactic-co-glycolic acid associated with hydroxyapatite and β-tricalcium phosphate) with three thicknesses (200, 500, and 700 µm) implanted in mice subcutaneously. Scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, and the quantification of carbon, hydrogen and nitrogen were used to characterize the physico-chemical properties. One hundred Balb-C mice were divided into 5 experimental groups: Group 1—Sham (without implantation); Group 2—200 μm; Group 3—500 μm; Group 4—700 μm; and Group 5—Pratix®. Each group was subdivided into four experimental periods (7, 30, 60 and 90 days). Samples were collected and processed for histological and histomorphometrical evaluation. The membranes showed no moderate or severe tissue reactions during the experimental periods studied. The 500-μm membrane showed no tissue reaction during any experimental period. The 200-μm membrane began to exhibit fragmentation after 30 days, while the 500-μm and 700-µm membranes began fragmentation at 90 days. All membranes studied were biocompatible and the 500 µm membrane showed the best results for absorption and tissue reaction, indicating its potential for clinical guided bone regeneration.

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Collagen Scaffolds Containing Hydroxyapatite-CaO Fiber Fragments for Bone Tissue Engineering

Polymers ◽

10.3390/polym12051174 ◽

2020 ◽

Vol 12 (5) ◽

pp. 1174 ◽

Cited By ~ 1

Author(s):

Shiao-Wen Tsai ◽

Sheng-Siang Huang ◽

Wen-Xin Yu ◽

Yu-Wei Hsu ◽

Fu-Yin Hsu

Keyword(s):

Tissue Engineering ◽

Bone Tissue Engineering ◽

Bone Regeneration ◽

Bone Tissue ◽

Drug Loading ◽

Sol Gel ◽

Regeneration Ability ◽

Burst Release ◽

Electrospinning Technique

Collagen (COL) and hydroxyapatite (HAp) are the major components of bone, therefore, COL-HAp composites have been widely used as bone substitutes to promote bone regeneration. We have reported that HAp-CaO fibers (HANFs), which were fabricated by a sol-gel route followed by an electrospinning technique, possessed good drug-loading efficiency and limited the burst release of tetracycline. In the present study, we used HANF fragments to evaluate the effects of COL-HANF scaffolds on MG63 osteoblast-like cell behaviors. COL-HANF composite scaffolds in which the average diameter of HANFs was approximately 461 ± 186 nm were fabricated by a freeze-drying process. The alkaline phosphatase activity and the protein expression levels of OCN and BSP showed that compared with COL alone, the COL-HANF scaffold promoted the differentiation of MG63 osteoblast-like cells. In addition, the bone regeneration ability of the COL-HANF scaffold was examined by using a rabbit condylar defect model in vivo. The COL-HANF scaffold was biodegradable and promoted bone regeneration eight weeks after the operation. Hence, we concluded that the COL-HANF scaffold has potential as a bone graft for bone tissue engineering.

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