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The Role of GH/IGF Axis in Dento-Alveolar Complex from Development to Aging and Therapeutics: A Narrative Review. Cells 2021; 10:cells10051181. [PMID: 34066078 PMCID: PMC8150312 DOI: 10.3390/cells10051181] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 05/02/2021] [Accepted: 05/10/2021] [Indexed: 12/30/2022] Open
Abstract
The GH/IGF axis is a major regulator of bone formation and resorption and is essential to the achievement of normal skeleton growth and homeostasis. Beyond its key role in bone physiology, the GH/IGF axis has also major pleiotropic endocrine and autocrine/paracrine effects on mineralized tissues throughout life. This article aims to review the literature on GH, IGFs, IGF binding proteins, and their respective receptors in dental tissues, both epithelium (enamel) and mesenchyme (dentin, pulp, and tooth-supporting periodontium). The present review re-examines and refines the expression of the elements of the GH/IGF axis in oral tissues and their in vivo and in vitro mechanisms of action in different mineralizing cell types of the dento-alveolar complex including ameloblasts, odontoblasts, pulp cells, cementoblasts, periodontal ligament cells, and jaw osteoblasts focusing on cell-specific activities. Together, these data emphasize the determinant role of the GH/IGF axis in physiological and pathological development, morphometry, and aging of the teeth, the periodontium, and oral bones in humans, rodents, and other vertebrates. These advancements in oral biology have elicited an enormous interest among investigators to translate the fundamental discoveries on the GH/IGF axis into innovative strategies for targeted oral tissue therapies with local treatments, associated or not with materials, for orthodontics and the repair and regeneration of the dento-alveolar complex and oral bones.
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Wen G, Xu J, Wu T, Zhang S, Chai Y, Kang Q, Li G. Functionalized Polycaprolactone/Hydroxyapatite Composite Microspheres for Promoting Bone Consolidation in a Rat Distraction Osteogenesis Model. J Orthop Res 2020; 38:961-971. [PMID: 31777101 DOI: 10.1002/jor.24542] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Accepted: 11/19/2019] [Indexed: 02/04/2023]
Abstract
Distraction osteogenesis (DO) is an ideal model to study bone regeneration. The major limitation is the relatively long period required for new bone consolidation. Here, we investigated whether the application of polycaprolactone (PCL) and hydroxyapatite (HA) composite microspheres could enhance bone formation in DO. Pure PCL microspheres and composite PCL and 10% HA microspheres were synthesized. Bone mesenchymal stem cells isolated from green fluorescent protein rats (GFP-rBMSCs) were cultured with microspheres in a rotary bioreactor system. Scanning electron microscopy was used to examine the microstructures. Osteogenic differentiation of rBMSCs was confirmed. Moreover, PCL/HA (20 mg) and PCL (20 mg) were locally administered into the distraction gap in the rat DO model toward the end of the distraction period. Imaging detection, mechanical and histological examinations were performed to assess the quality of the 4-week regenerates. Results showed that the microspheres were of uniform size and monodisperse. After incubation with rBMSCs in culture, PCL/HA microspheres showed a better ability for cell adhesion and osteogenic differentiation compared with PCL microspheres. In vivo, bone volume/total tissue volume, bone mineral density, and mechanical properties of the new callus were significantly higher in the PCL/HA group compared with the PCL group. Histological analyses confirmed improved bone formation and vascularization in PCL/HA group. We presented an effective protocol for the generation of functionalized microspheres and demonstrated implantation of PCL/HA microspheres into the distraction regenerate could significantly enhance bone consolidation. Thus, the application of PCL/HA composite microspheres may be a novel approach for promoting bone regeneration. This article is protected by copyright. All rights reserved © 2019 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 38:961-971, 2020.
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Affiliation(s)
- Gen Wen
- The First Affiliated Hospital of Soochow University, Suzhou, PR China
| | - Jia Xu
- Department of Orthopaedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, PR China
| | - Tianyi Wu
- Department of Orthopaedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, PR China
| | - Shengmin Zhang
- Advanced Biomaterials and Tissue Engineering Center, Huazhong University of Science and Technology, Wuhan, PR China
| | - Yimin Chai
- Department of Orthopaedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, PR China
| | - Qinglin Kang
- Department of Orthopaedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, PR China
| | - Gang Li
- Department of Orthopaedics & Traumatology, Stem Cells and Regeneration Laboratory, Li Ka Shing Institute of Health Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong SAR, PR China
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Garcia RF, Duarte AAPDS, Boing F, Ligabue RA, Pagnoncelli RM. Incorporação do hormônio do crescimento humano recombinante (rhGH) em matriz de polímero biodegradável. REVISTA DE ODONTOLOGIA DA UNESP 2015. [DOI: 10.1590/1807-2577.1082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
<title>Resumo</title><sec><title>Objetivo</title><p>Incorporar o hormônio de crescimento recombinante humano em um polímero biodegradável (PLGA).</p></sec><sec><title>Material e método</title><p>As matrizes foram confeccionadas através da técnica de evaporação de solventes. Foi feita uma mistura do polímero (poli ácido glicólico lático) e do hormônio do crescimento humano recombinante (Saizen<sup>®</sup> Merck Serono S.A. Aubonne, Suíça). Essa mistura foi vertida em moldes de silicone circulares de 1 cm de diâmetro e aproximadamente 2 mm de espessura, e levada para secagem em uma câmara de evaporação de solvente por 48 horas. Após esse período, as matrizes foram imersas em PBS e passaram por um banho termostatizado (ensaio de degradação hidrolítica), <italic>in vitro</italic>, à temperatura de 37°C. As amostras foram retiradas do banho no intervalo de 1, 2, 3, 4, 7, 10 e 14 dias. Foram aferidas a perda de massa, a variação do pH e a concentração do hormônio liberado em função do tempo.</p></sec><sec><title>Resultado</title><p>A concentração do hormônio liberado em função do tempo foi aumentando até o terceiro dia. No quarto dia, houve uma queda e, no sétimo, ocorreu um aumento do hormônio liberado, estendendo-se até o décimo dia; no 14° dia, houve queda novamente. O pH teve uma queda brusca de 7,4 para 3,2 no primeiro dia, mantendo uma pequena queda até o 14° dia. A perda de massa foi gradual em relação ao tempo, como já era esperado.</p></sec><sec><title>Conclusão</title><p>O PLGA é um bom biomaterial para confecção de matrizes com hormônio do crescimento. Revelou-se possível incorporar o rhGH nessa matriz, de modo a, então, desenvolver-se um substituto ósseo.</p></sec>
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Affiliation(s)
| | | | - Fernanda Boing
- Pontifícia Universidade Católica do Rio Grande do Sul, Brazil
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Kaderli S, Boulocher C, Pillet E, Watrelot-Virieux D, Rougemont A, Roger T, Viguier E, Gurny R, Scapozza L, Jordan O. A novel biocompatible hyaluronic acid–chitosan hybrid hydrogel for osteoarthrosis therapy. Int J Pharm 2015; 483:158-68. [DOI: 10.1016/j.ijpharm.2015.01.052] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Revised: 01/28/2015] [Accepted: 01/30/2015] [Indexed: 12/19/2022]
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Makhdom AM, Nayef L, Tabrizian M, Hamdy RC. The potential roles of nanobiomaterials in distraction osteogenesis. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2015; 11:1-18. [DOI: 10.1016/j.nano.2014.05.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2014] [Revised: 04/25/2014] [Accepted: 05/16/2014] [Indexed: 10/25/2022]
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Hong P, Boyd D, Beyea SD, Bezuhly M. Enhancement of bone consolidation in mandibular distraction osteogenesis: A contemporary review of experimental studies involving adjuvant therapies. J Plast Reconstr Aesthet Surg 2013; 66:883-95. [DOI: 10.1016/j.bjps.2013.03.030] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2012] [Revised: 02/14/2013] [Accepted: 03/16/2013] [Indexed: 11/28/2022]
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Craniofacial surgery, from past pioneers to future promise. J Maxillofac Oral Surg 2010; 8:348-56. [PMID: 23139542 DOI: 10.1007/s12663-009-0084-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2008] [Accepted: 11/21/2009] [Indexed: 12/20/2022] Open
Abstract
OBJECTIVES As a surgical subspecialty devoted to restoration of normal facial and calvarial anatomy, craniofacial surgeons must navigate the balance between pathologic states of bone excess and bone deficit. While current techniques employed take root in lessons learned from the success and failure of early pioneers, craniofacial surgery continues to evolve, and novel modalities will undoubtedly arise integrating past and present experiences with future promise to effectively treat craniofacial disorders. METHODS This review provides an overview of current approaches in craniofacial surgery for treating states of bone excess and deficit, recent advances in our understanding of the molecular and cellular processes underlying craniosynostosis, a pathological state of bone excess, and current research efforts in cellular-based therapies for bone regeneration. RESULTS The surgical treatment of bone excess and deficit has evolved to improve both the functional and morphological outcomes of affected patients. Recent progress in elucidating the molecular and cellular mechanisms governing bone formation will be instrumental for developing improved therapies for the treatment of pathological states of bone excess and deficit. CONCLUSIONS While significant advances have been achieved in craniofacial surgery, improved strategies for addressing states of bone excess and bone deficit in the craniofacial region are needed. Investigations on the biomolecular events involved in craniosynostosis and cellular-based bone tissue engineering may soon be added to the armamentarium of surgeons treating craniofacial dysmorphologies.
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Price DL, Moore EJ, Friedman O, Garces YI, Kee AY, Furutani KM. Effect of Radiation on Segmental Distraction Osteogenesis in Rabbits. ACTA ACUST UNITED AC 2008; 10:159-63. [DOI: 10.1001/archfaci.10.3.159] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Daniel L. Price
- Departments of Otorhinolaryngology (Drs Price, Moore, and Friedman) and Radiation Oncology (Drs Garces, Kee, and Furutani), Mayo Clinic, Rochester, Minnesota
| | - Eric J. Moore
- Departments of Otorhinolaryngology (Drs Price, Moore, and Friedman) and Radiation Oncology (Drs Garces, Kee, and Furutani), Mayo Clinic, Rochester, Minnesota
| | - Oren Friedman
- Departments of Otorhinolaryngology (Drs Price, Moore, and Friedman) and Radiation Oncology (Drs Garces, Kee, and Furutani), Mayo Clinic, Rochester, Minnesota
| | - Yolanda I. Garces
- Departments of Otorhinolaryngology (Drs Price, Moore, and Friedman) and Radiation Oncology (Drs Garces, Kee, and Furutani), Mayo Clinic, Rochester, Minnesota
| | - Andrew Y. Kee
- Departments of Otorhinolaryngology (Drs Price, Moore, and Friedman) and Radiation Oncology (Drs Garces, Kee, and Furutani), Mayo Clinic, Rochester, Minnesota
| | - Keith M. Furutani
- Departments of Otorhinolaryngology (Drs Price, Moore, and Friedman) and Radiation Oncology (Drs Garces, Kee, and Furutani), Mayo Clinic, Rochester, Minnesota
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Pereira MA, Luiz de Freitas PH, da Rosa TF, Xavier CB. Understanding Distraction Osteogenesis on the Maxillofacial Complex: A Literature Review. J Oral Maxillofac Surg 2007; 65:2518-23. [DOI: 10.1016/j.joms.2006.10.019] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2005] [Revised: 03/09/2006] [Accepted: 10/16/2006] [Indexed: 10/22/2022]
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Abstract
This manuscript presents hydrogels (HGs) from a tissue engineering perspective being especially written for those who are approaching this field by offering a concise but inclusive review of hydrogel synthesis, properties, characterization methods, and applications.
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Affiliation(s)
- Biancamaria Baroli
- Dipartimento Farmaco Chimico Tecnologico, Università di Cagliari, Via Ospedale, 72, 09124 Cagliari, Italy.
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Abstract
Chitosan is a partially deacetylated polymer obtained from the alkaline deacetylation of chitin, which is a glucose-based, unbranched polysaccharide that occurs widely in nature as the principal component of exoskeletons of crustaceans and insects, as well as of the cell walls of some bacteria and fungi. Chitosan exhibits a variety of physicochemical and biological properties resulting in numerous applications in fields such as waste water treatment, agriculture, fabric and textiles, cosmetics, nutritional enhancement and food processing. In addition to its lack of toxicity and allergenicity, its biocompatibility, biodegradability and bioactivity make it a very attractive substance for diverse applications as a biomaterial in the pharmaceutical and medical fields. This review takes a closer look at the biomedical applications of chitosan microspheres. Based on recent research and existing products, some new and potential future approaches in this fascinating area are discussed.
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Affiliation(s)
- Jaleh Varshosaz
- Department of Pharmaceutics, School of Pharmacy, Isfahan University of Medical Sciences, Isfahan, Iran.
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Abstract
Repair and reconstruction of the craniofacial skeleton represents a significant biomedical burden, with thousands of procedures per-formed annually secondary to injuries and congenital malformations. Given the multitude of current approaches, the need for more effective strategies to repair these bone deficits is apparent. This article explores two major modalities for craniofacial bone tissue engineering: distraction osteogenesis and cellular based therapies. Current understanding of the guiding principles for each of these modalities is elaborated on along with the knowledge gained from clinical and investigative studies. By laying this foundation, future directions for craniofacial distraction and cell-based bone engineering have emerged with great promise for the advancement of clinical practice.
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Affiliation(s)
- Derrick C Wan
- Stanford University School of Medicine, 257 Campus Drive West, Stanford, CA 94305-5148, USA
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Abstract
Reconstruction of craniofacial bony deficiencies, whether acquired through trauma or as a result of treatment for disease, is a chronic problem. Although numerous approaches utilizing a wide array of materials ranging from alloplastic materials to autogenous bone grafts have been employed to achieve bony replacement, no ideal clinical approach exists. In this brief review, we will provide an overview of current approaches to treating craniofacial bony defects. We will then discuss advances being made in the design of scaffolding materials and potential candidate cell types with which to design tissue-engineered constructs for craniofacial skeletal repair.
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Affiliation(s)
- R P Nacamuli
- Children's Surgical Research Program, Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, CA 94305, USA
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Biodegradable polymers for microencapsulation of drugs. Molecules 2005; 10:146-61. [PMID: 18007283 PMCID: PMC6147704 DOI: 10.3390/10010146] [Citation(s) in RCA: 219] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2004] [Accepted: 07/01/2004] [Indexed: 11/30/2022] Open
Abstract
Drug delivery has become increasingly important mainly due to the awareness of the difficulties associated with a variety of old and new drugs. Of the many polymeric drug delivery systems, biodegradable polymers have been used widely as drug delivery systems because of their biocompatibility and biodegradability. The majority of biodegradable polymers have been used in the form of microparticles, from which the incorporated drug is released to the environment in a controlled manner. The factors responsible for controlling the drug release rate are physicochemical properties of drugs, degradation rate of polymers, and the morphology and size of microparticles. This review discusses the conventional and recent technologies for microencapsulation of the drugs using biodegradable polymers. In addition, this review presents characteristics and degradation behaviors of biodegradable polymers which are currently used in drug delivery.
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Nacamuli RP, Wan DC, Lenton KA, Longaker MT. New developments in pediatric plastic surgery research. Clin Plast Surg 2005; 32:123-36, ix-x. [PMID: 15636770 DOI: 10.1016/j.cps.2004.10.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Pediatric plastic surgery research is a rapidly expanding field. Unique in many ways, researchers in this field stand at the union of multiple scientific specialties, including biomedical engineering, tissue engineering, polymer science, molecular biology, developmental biology, and genetics. The goal of this scientific effort is to translate research advances into improved treatments for children with congenital and acquired defects. Although the last decade has seen a dramatic acceleration in research related to pediatric plastic surgery, the next 10 years will no doubt lead to novel treatment strategies with improved clinical outcomes.
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Affiliation(s)
- Randall P Nacamuli
- Children's Surgical Research Program, Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, Stanford University Medical Center, 257 Campus Drive, Stanford, CA 94305-5148, USA
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