1
|
Etschmaier V, Üçal M, Lohberger B, Weinberg A, Schäfer U. Ex vivo organotypic bone slice culture reveals preferential chondrogenesis after sustained growth plate injury. Cells Dev 2024:203927. [PMID: 38740089 DOI: 10.1016/j.cdev.2024.203927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 02/21/2024] [Accepted: 05/10/2024] [Indexed: 05/16/2024]
Abstract
Postnatal bone growth primarily relies on chondrocyte proliferation and osteogenic differentiation within the growth plate (GP) via endochondral ossification. Despite its importance, the GP is vulnerable to injuries, affecting 15-30 % of bone fractures. These injuries may lead to growth discrepancies, influence bone length and shape, and negatively affecting the patient's quality of life. This study aimed to investigate the molecular and cellular physiological and pathophysiological regeneration following sustained growth plate injury (GPI) in an ex vivo rat femur organotypic culture (OTC) model. Specifically, focusing on postnatal endochondral ossification process. 300 μm thick ex vivo bone cultures with a 2 mm long horizontal GPI was utilized. After 15 days of cultivation, gene expression analysis, histological and immunohistochemistry staining's were conducted to analyze key markers of endochondral ossification. In our OTCs we observed a significant increase in Sox9 expression due to GPI at day 15. The Ihh-PTHrP feedback loop was affected, favoring chondrocyte proliferation and maturation. Ihh levels increased significantly on day 7 and day 15, while PTHrP was downregulated on day 7. GPI had no impact on osteoclast number and activity, but gene expression analysis indicated OTCs' efforts to inhibit osteoclast differentiation and activation, thereby reducing bone resorption. In conclusion, our study provides novel insights into the molecular and cellular mechanisms underlying postnatal bone growth and regeneration following growth plate injury (GPI). We demonstrate that chondrocyte proliferation and differentiation play pivotal roles in the regeneration process, with the Ihh-PTHrP feedback loop modulating these processes. Importantly, our ex vivo rat femur organotypic culture model allows for the detailed investigation of these processes, providing a valuable tool for future research in the field of skeletal biology and regenerative medicine.
Collapse
Affiliation(s)
- Vanessa Etschmaier
- Department of Orthopaedics and Trauma, Medical University Graz, 8036 Graz, Austria.
| | - Muammer Üçal
- Department of Neurosurgery, Research Unit for Experimental Neurotraumatology, Medical University of Graz, 8036 Graz, Austria; Bio-Tech-Med Graz, 8010 Graz, Austria.
| | - Birgit Lohberger
- Department of Orthopaedics and Trauma, Medical University Graz, 8036 Graz, Austria.
| | - Annelie Weinberg
- Department of Orthopaedics and Trauma, Medical University Graz, 8036 Graz, Austria.
| | - Ute Schäfer
- Department of Neurosurgery, Research Unit for Experimental Neurotraumatology, Medical University of Graz, 8036 Graz, Austria.
| |
Collapse
|
2
|
Guo R, Zhuang H, Chen X, Ben Y, Fan M, Wang Y, Zheng P. Tissue engineering in growth plate cartilage regeneration: Mechanisms to therapeutic strategies. J Tissue Eng 2023; 14:20417314231187956. [PMID: 37483459 PMCID: PMC10359656 DOI: 10.1177/20417314231187956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 06/29/2023] [Indexed: 07/25/2023] Open
Abstract
The repair of growth plate injuries is a highly complex process that involves precise spatiotemporal regulation of multiple cell types. While significant progress has been made in understanding the pathological mechanisms underlying growth plate injuries, effectively regulating this process to regenerate the injured growth plate cartilage remains a challenge. Tissue engineering technology has emerged as a promising therapeutic approach for achieving tissue regeneration through the use of functional biological materials, seed cells and biological factors, and it is now widely applied to the regeneration of bone and cartilage. However, due to the unique structure and function of growth plate cartilage, distinct strategies are required for effective regeneration. Thus, this review provides an overview of current research on the application of tissue engineering to promote growth plate regeneration. It aims to elucidates the underlying mechanisms by which tissue engineering promotes growth plate regeneration and to provide novel insights and therapeutic strategies for future research on the regeneration of growth plate.
Collapse
Affiliation(s)
| | | | | | | | | | | | - Pengfei Zheng
- Department of Orthopaedic Surgery, Children’s Hospital of Nanjing Medical University, Nanjing, China
| |
Collapse
|
3
|
Tiffany AS, Harley BA. Growing Pains: The Need for Engineered Platforms to Study Growth Plate Biology. Adv Healthc Mater 2022; 11:e2200471. [PMID: 35905390 PMCID: PMC9547842 DOI: 10.1002/adhm.202200471] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 07/11/2022] [Indexed: 01/27/2023]
Abstract
Growth plates, or physis, are highly specialized cartilage tissues responsible for longitudinal bone growth in children and adolescents. Chondrocytes that reside in growth plates are organized into three distinct zones essential for proper function. Modeling key features of growth plates may provide an avenue to develop advanced tissue engineering strategies and perspectives for cartilage and bone regenerative medicine applications and a platform to study processes linked to disease progression. In this review, a brief introduction of the growth plates and their role in skeletal development is first provided. Injuries and diseases of the growth plates as well as physiological and pathological mechanisms associated with remodeling and disease progression are discussed. Growth plate biology, namely, its architecture and extracellular matrix organization, resident cell types, and growth factor signaling are then focused. Next, opportunities and challenges for developing 3D biomaterial models to study aspects of growth plate biology and disease in vitro are discussed. Finally, opportunities for increasingly sophisticated in vitro biomaterial models of the growth plate to study spatiotemporal aspects of growth plate remodeling, to investigate multicellular signaling underlying growth plate biology, and to develop platforms that address key roadblocks to in vivo musculoskeletal tissue engineering applications are described.
Collapse
Affiliation(s)
- Aleczandria S. Tiffany
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801
| | - Brendan A.C. Harley
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801
| |
Collapse
|
4
|
Nutritional Approaches as a Treatment for Impaired Bone Growth and Quality Following the Consumption of Ultra-Processed Food. Int J Mol Sci 2022; 23:ijms23020841. [PMID: 35055025 PMCID: PMC8776230 DOI: 10.3390/ijms23020841] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 01/09/2022] [Accepted: 01/11/2022] [Indexed: 01/23/2023] Open
Abstract
The severe impairment of bone development and quality was recently described as a new target for unbalanced ultra-processed food (UPF). Here, we describe nutritional approaches to repair this skeletal impairment in rats: supplementation with micro-nutrients and a rescue approach and switching the UPF to balanced nutrition during the growth period. The positive effect of supplementation with multi-vitamins and minerals on bone growth and quality was followed by the formation of mineral deposits on the rats' kidneys and modifications in the expression of genes involved in inflammation and vitamin-D metabolism, demonstrating the cost of supplementation. Short and prolonged rescue improved trabecular parameters but incompletely improved the cortical parameters and the mechanical performance of the femur. Cortical porosity and cartilaginous lesions in the growth-plate were still detected one week after rescue and were reduced to normal levels 3 weeks after rescue. These findings highlight bone as a target for the effect of UPF and emphasize the importance of a balanced diet, especially during growth.
Collapse
|
5
|
Walzer SM, Toegel S, Chiari C, Farr S, Rinner B, Weinberg AM, Weinmann D, Fischer MB, Windhager R. A 3-Dimensional In Vitro Model of Zonally Organized Extracellular Matrix. Cartilage 2021; 13:336S-345S. [PMID: 31370667 PMCID: PMC8804753 DOI: 10.1177/1947603519865320] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
OBJECTIVE Functional cartilage repair requires the new formation of organized hyaline cartilaginous matrix to avoid the generation of fibrous repair tissue. The potential of mesenchymal progenitors was used to assemble a 3-dimensional structure in vitro, reflecting the zonation of collagen matrix in hyaline articular cartilage. DESIGN The 3-dimensional architecture of collagen alignment in pellet cultures of chondroprogenitors (CPs) was assessed with Picrosirius red staining analyzed under polarized light. In parallel assays, the trilineage capability was confirmed by calcium deposition during osteogenesis by alizarin S staining and alkaline phosphatase staining. Using reverse transcription-quantitative polymerase chain reaction (RT-qPCR), mRNA levels of ALP, RUNX2, and BGLAP were assessed after 21 days of osteoinduction. Lipid droplets were stained with oil red O and adipogenic differentiation was confirmed by RT-qPCR analysis of PPARG and LPL gene expression. RESULTS Under conditions promoting the chondrogenic signature in self-assembling constructs, CPs formed an aligned extracellular matrix, positive for glycosaminoglycans and collagen type II, showing developing zonation of birefringent collagen fibers along the cross section of pellets, which reflect the distribution of collagen fibers in hyaline cartilage. Induced osteogenic and adipogenic differentiation confirmed the trilineage potential of CPs. CONCLUSION This model promotes the differentiation and self-organization of postnatal chondroprogenitors, resulting in the formation of zonally organized engineered hyaline cartilage comparable to the 3 zones of native cartilage.
Collapse
Affiliation(s)
- Sonja M. Walzer
- Karl Chiari Lab for Orthopaedic Biology,
Department of Orthopedics and Trauma Surgery, Medical University of Vienna, Vienna,
Austria,Sonja M. Walzer, Karl Chiari Lab for
Orthopaedic Biology, Department of Orthopedics and Trauma Surgery, Medical
University of Vienna, Waehringer Guertel 18-20, Vienna, 1090, Austria.
| | - Stefan Toegel
- Karl Chiari Lab for Orthopaedic Biology,
Department of Orthopedics and Trauma Surgery, Medical University of Vienna, Vienna,
Austria
| | - Catharina Chiari
- Karl Chiari Lab for Orthopaedic Biology,
Department of Orthopedics and Trauma Surgery, Medical University of Vienna, Vienna,
Austria
| | | | - Beate Rinner
- Division of Biomedical Research, Medical
University of Graz, Graz, Steiermark, Austria
| | - Annelie-Martina Weinberg
- Department of Orthopaedic and Trauma
Surgery, Medical University of Graz, Graz, Steiermark, Austria
| | - Daniela Weinmann
- Karl Chiari Lab for Orthopaedic Biology,
Department of Orthopedics and Trauma Surgery, Medical University of Vienna, Vienna,
Austria
| | - Michael B. Fischer
- Center for Biomedical Technology, Danube
University Krems, Krems an der Donau, Austria,Clinic for Bloodgroup Serology and
Transfusion Medicine, Medical University of Vienna, Vienna, Austria
| | - Reinhard Windhager
- Karl Chiari Lab for Orthopaedic Biology,
Department of Orthopedics and Trauma Surgery, Medical University of Vienna, Vienna,
Austria
| |
Collapse
|
6
|
Ultra-processed food targets bone quality via endochondral ossification. Bone Res 2021; 9:14. [PMID: 33637698 PMCID: PMC7910299 DOI: 10.1038/s41413-020-00127-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 10/11/2020] [Accepted: 11/01/2020] [Indexed: 01/31/2023] Open
Abstract
Ultra-processed foods have known negative implications for health; however, their effect on skeletal development has never been explored. Here, we show that young rats fed ultra-processed food rich in fat and sugar suffer from growth retardation due to lesions in their tibial growth plates. The bone mineral density decreases significantly, and the structural parameters of the bone deteriorate, presenting a sieve-like appearance in the cortices and poor trabecular parameters in long bones and vertebrae. This results in inferior mechanical performance of the entire bone with a high fracture risk. RNA sequence analysis of the growth plates demonstrated an imbalance in extracellular matrix formation and degradation and impairment of proliferation, differentiation and mineralization processes. Our findings highlight, for the first time, the severe impact of consuming ultra-processed foods on the growing skeleton. This pathology extends far beyond that explained by the known metabolic effects, highlighting bone as a new target for studies of modern diets.
Collapse
|
7
|
Ma R, Liu S, Qiao T, Li D, Zhang R, Guo X. Fluoride Inhibits Longitudinal Bone Growth by Acting Directly at the Growth Plate in Cultured Neonatal Rat Metatarsal Bones. Biol Trace Elem Res 2020; 197:522-532. [PMID: 31838736 DOI: 10.1007/s12011-019-01997-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Accepted: 11/27/2019] [Indexed: 02/03/2023]
Abstract
Excessive intake of fluoride inhibits bone growth in both humans and animals. It is unknown whether fluoride acts directly on the growth plate to inhibit longitudinal bone growth, and its mechanism of action has not been elucidated. In this study, we used an organ culture system and SW1353 cells to evaluate the effects of fluoride on endochondral ossification. Neonatal rat metatarsal bones were dissected and cultured with or without fluoride for 7 days. The total length and width of the metatarsal rudiments and the length of the calcification zone were measured. Chondrocyte proliferation, differentiation, and apoptosis were analyzed by immunohistochemistry and TUNEL assay in sectioned bones. The apoptosis was detected by flow cytometry, and the expression of apoptosis-related proteins Bax, Bcl-2, and Caspase-3 were detected by western blotting in SW1353 cells. Linear measurements demonstrated that fluoride induced a biphasic effect on longitudinal bone growth in organ culture, with a significant growth inhibition at a high concentration (10-4 M) and a stimulatory action at low concentration (10-6 M) of fluoride. Histomorphometrical analysis of growth plate from fluoride-exposed metatarsal rudiments showed a significant reduction in the height of the proliferative and hypertrophic chondrocyte zones. Analysis of the Col2α1 and Col10α1 expression by immunohistochemistry revealed fluoride-suppressed metatarsal growth plate chondrocyte proliferation and differentiation. In addition, fluoride increased the number of apoptotic chondrocytes in the metatarsal growth plate. Western blotting showed an up-regulated expression of Caspase-3 and Bax and down-regulated expression of anti-apoptotic protein Bcl-2 after treatment with 5 × 10-4 M fluoride in SW1353 cells. Our findings indicated that fluoride inhibited longitudinal bone growth by acting directly at the growth plate in cultured neonatal rat metatarsal bones. Such growth inhibition was mediated by suppressing proliferation and differentiation, increasing apoptosis of resting chondrocytes and causing premature cell senescence in the growth plate.
Collapse
Affiliation(s)
- Rui Ma
- Department of Environmental Health, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province, People's Republic of China
| | - Shuang Liu
- Department of Environmental Health, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province, People's Republic of China
| | - Tingting Qiao
- Department of Environmental Health, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province, People's Republic of China
| | - Demin Li
- Department of Environmental Health, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province, People's Republic of China
| | - Ruixue Zhang
- Department of Environmental Health, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province, People's Republic of China
| | - Xiaoying Guo
- Department of Environmental Health, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province, People's Republic of China.
| |
Collapse
|
8
|
Staines KA, Madi K, Javaheri B, Lee PD, Pitsillides AA. A Computed Microtomography Method for Understanding Epiphyseal Growth Plate Fusion. FRONTIERS IN MATERIALS 2018; 4:48. [PMID: 29417047 PMCID: PMC5798587 DOI: 10.3389/fmats.2017.00048] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The epiphyseal growth plate is a developmental region responsible for linear bone growth, in which chondrocytes undertake a tightly regulated series of biological processes. Concomitant with the cessation of growth and sexual maturation, the human growth plate undergoes progressive narrowing, and ultimately disappears. Despite the crucial role of this growth plate fusion "bridging" event, the precise mechanisms by which it is governed are complex and yet to be established. Progress is hindered by the current methods for growth plate visualization; these are invasive and largely rely on histological procedures. Here, we describe our non-invasive method utilizing synchrotron X-ray computed microtomography for the examination of growth plate bridging, which ultimately leads to its closure coincident with termination of further longitudinal bone growth. We then apply this method to a dataset obtained from a benchtop micro computed tomography scanner to highlight its potential for wide usage. Furthermore, we conduct finite element modeling at the micron-scale to reveal the effects of growth plate bridging on local tissue mechanics. Employment of these 3D analyses of growth plate bone bridging is likely to advance our understanding of the physiological mechanisms that control growth plate fusion.
Collapse
Affiliation(s)
- Katherine A. Staines
- School of Applied Sciences, Edinburgh Napier University, Edinburgh, United Kingdom
| | - Kamel Madi
- School of Materials, The University of Manchester, Manchester, United Kingdom
| | - Behzad Javaheri
- Comparative Biomedical Sciences, Royal Veterinary College, London, United Kingdom
| | - Peter D. Lee
- School of Materials, The University of Manchester, Manchester, United Kingdom
| | | |
Collapse
|
9
|
Szychlinska MA, Stoddart MJ, D'Amora U, Ambrosio L, Alini M, Musumeci G. Mesenchymal Stem Cell-Based Cartilage Regeneration Approach and Cell Senescence: Can We Manipulate Cell Aging and Function? TISSUE ENGINEERING PART B-REVIEWS 2017; 23:529-539. [PMID: 28514935 DOI: 10.1089/ten.teb.2017.0083] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Aging is the most prominent risk factor triggering several degenerative diseases, such as osteoarthritis (OA). Due to its poor self-healing capacity, once injured cartilage needs to be reestablished. This process might be approached through resorting to cell-based therapies and/or tissue engineering. Human mesenchymal stem cells (MSCs) represent a promising approach due to their chondrogenic differentiation potential. Presently, in vitro chondrogenic differentiation of MSCs is limited by two main reasons as follows: aging of MSCs, which determines the loss of cell proliferative and differentiation capacity and MSC-derived chondrocyte hypertrophic differentiation, which limits the use of these cells in cartilage tissue regeneration approach. The effect of aging on MSCs is fundamental for stem cell-based therapy development, especially in older subjects. In the present review we focus on homeostasis alterations occurring in MSC-derived chondrocytes during in vitro aging. Moreover, we deal with potential cell aging regulation approaches, such as cell stimulation through telomerase activators, mechanical strain, and epigenetic regulation. Future investigations in this field might provide new insights into innovative strategies for cartilage regeneration and potentially inspire novel therapeutic approaches for OA treatment.
Collapse
Affiliation(s)
- Marta A Szychlinska
- 1 Human Anatomy and Histology Section, Department of Biomedical and Biotechnological Sciences, School of Medicine, University of Catania , Catania, Italy
| | - Martin J Stoddart
- 2 Musculoskeletal Regeneration, AO Research Institute Davos , Davos Platz, Switzerland
| | - Ugo D'Amora
- 3 Institute of Polymers , Composites and Biomaterials, National Research Council of Italy, Naples, Italy
| | - Luigi Ambrosio
- 3 Institute of Polymers , Composites and Biomaterials, National Research Council of Italy, Naples, Italy .,4 Department of Chemical Science and Materials Technology, National Research Council of Italy , Rome, Italy
| | - Mauro Alini
- 2 Musculoskeletal Regeneration, AO Research Institute Davos , Davos Platz, Switzerland
| | - Giuseppe Musumeci
- 1 Human Anatomy and Histology Section, Department of Biomedical and Biotechnological Sciences, School of Medicine, University of Catania , Catania, Italy .,5 Department of Health, Institut des Etudes Universitaries , UniPoliSI, Veyras, Switzerland
| |
Collapse
|
10
|
|
11
|
Shiguetomi-Medina JM, Møller-Madsen B, Rahbek O. Physeal histological morphology after thermal epiphysiodesis using radiofrequency ablation. J Orthop Traumatol 2016; 18:121-126. [PMID: 27709362 PMCID: PMC5429251 DOI: 10.1007/s10195-016-0430-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Accepted: 09/22/2016] [Indexed: 12/03/2022] Open
Abstract
Background Several treatments have been described for leg length discrepancy. Epiphysiodesis is the most commonly used because of its effectiveness. Thermal epiphysiodesis using radiofrequency ablation (RFA) alters the growth plate morphology without damaging the adjacent articular cartilage; it is a minimally invasive method that has shown excellent results in animal models. This study describes the macro and micro morphology after the procedure. Materials and methods Epiphysiodesis using RFA was performed in vivo for 8 min (92–98 °C) at two ablation sites (medial and lateral) in one randomly-selected tibia in eight growing pigs. The contralateral tibia was used as control. After 12 weeks, the pigs were killed and the tibiae harvested. The specimens were studied macroscopically and histology samples were obtained. Physeal morphology, thickness and characteristics were then described. Results Macroscopically, the articular cartilage was normal in all the treated tibiae. Microscopically, the physis was detected as a discontinuous line on the treated tibiae while it was continuous in all controls. In the control specimens, the mean thickness of the physis was 625 µm (606–639, SD = 14). All the physeal layers were organized. In the ablated specimens, disorganized layers in a heterogeneous line were observed. Bone bridges were identified at the ablation sites. The central part of the physis looked normal. Next to the bone bridge, the physis was thicker and presented fibrosis. The mean thickness was 820 µm (628–949, SD = 130). No abnormalities in the articular cartilage were observed. Conclusions Thermal epiphysiodesis with RFA disrupts the physeal morphology and causes the formation of bone bridges at the ablation sites. This procedure does not damage the adjacent articular cartilage. The damaged tissue, next to the bone bridges, is characterized by disorganization and fibrosis.
Collapse
Affiliation(s)
- Juan Manuel Shiguetomi-Medina
- Orthopaedics Research Laboratory, Aarhus University Hospital, Noerrebrogade 44, 8000, Aarhus C, Denmark. .,Department of Children's Orthopaedics, Aarhus University Hospital, Noerrebrogade 44, 8000, Aarhus C, Denmark.
| | - B Møller-Madsen
- Department of Children's Orthopaedics, Aarhus University Hospital, Noerrebrogade 44, 8000, Aarhus C, Denmark
| | - O Rahbek
- Department of Children's Orthopaedics, Aarhus University Hospital, Noerrebrogade 44, 8000, Aarhus C, Denmark
| |
Collapse
|
12
|
Musumeci G, Coleman R, Imbesi R, Magro G, Parenti R, Szychlinska MA, Scuderi R, Cinà CS, Castorina S, Castrogiovanni P. ADAM-10 could mediate cleavage of N-cadherin promoting apoptosis in human atherosclerotic lesions leading to vulnerable plaque: a morphological and immunohistochemical study. Acta Histochem 2014; 116:1148-58. [PMID: 24985126 DOI: 10.1016/j.acthis.2014.06.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Revised: 06/01/2014] [Accepted: 06/02/2014] [Indexed: 01/03/2023]
Abstract
Atherosclerosis remains a major cause of mortality. Whereas the histopathological progression of atherosclerotic lesions is well documented, much less is known about the development of unstable or vulnerable plaque, which can rupture leading to thrombus, luminal occlusion and infarct. Apoptosis in the fibrous cap, which is rich in vascular smooth muscle cells (VSMCs) and macrophages, and its subsequent weakening or erosion seems to be an important regulator of plaque stability. The aim of our study was to improve our knowledge on the biological mechanisms that cause plaque instability in order to develop new therapies to maintain atherosclerotic plaque stability and avoid its rupture. In our study, we collected surgical specimens from atherosclerotic plaques in the right or left internal carotid artery of 62 patients with evident clinical symptoms. Histopathology and histochemistry were performed on wax-embedded sections. Immunohistochemical localization of caspase-3, N-cadherin and ADAM-10 was undertaken in order to highlight links between apoptosis, as expressed by caspase-3 immunostaining, and possible roles of N-cadherin, a cell-cell junction protein in VSMCs and macrophages that provides a pro-survival signal reducing apoptosis, and ADAM-10, a "disintegrin and metalloproteases" that is able to cleave N-cadherin in glioblastomas. Our results showed that when apoptosis, expressed by caspase-3 immunostaining, increased in the fibrous cap, rich in VSMCs and macrophages, the expression of N-cadherin decreased. The decreased N-cadherin expression, in turn, was linked to increased ADAM-10 expression. This study shows that apoptotic events are probably involved in the vulnerability of atherosclerotic plaque.
Collapse
|
13
|
Musumeci G, Castrogiovanni P, Leonardi R, Trovato FM, Szychlinska MA, Di Giunta A, Loreto C, Castorina S. New perspectives for articular cartilage repair treatment through tissue engineering: A contemporary review. World J Orthop 2014; 5:80-88. [PMID: 24829869 PMCID: PMC4017310 DOI: 10.5312/wjo.v5.i2.80] [Citation(s) in RCA: 94] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2013] [Accepted: 02/20/2014] [Indexed: 02/06/2023] Open
Abstract
In this paper review we describe benefits and disadvantages of the established methods of cartilage regeneration that seem to have a better long-term effectiveness. We illustrated the anatomical aspect of the knee joint cartilage, the current state of cartilage tissue engineering, through mesenchymal stem cells and biomaterials, and in conclusion we provide a short overview on the rehabilitation after articular cartilage repair procedures. Adult articular cartilage has low capacity to repair itself, and thus even minor injuries may lead to progressive damage and osteoarthritic joint degeneration, resulting in significant pain and disability. Numerous efforts have been made to develop tissue-engineered grafts or patches to repair focal chondral and osteochondral defects, and to date several researchers aim to implement clinical application of cell-based therapies for cartilage repair. A literature review was conducted on PubMed, Scopus and Google Scholar using appropriate keywords, examining the current literature on the well-known tissue engineering methods for the treatment of knee osteoarthritis.
Collapse
|
14
|
Musumeci G, Castrogiovanni P, Mazzone V, Szychlinska MA, Castorina S, Loreto C. Histochemistry as a unique approach for investigating normal and osteoarthritic cartilage. Eur J Histochem 2014; 58:2371. [PMID: 24998926 PMCID: PMC4083326 DOI: 10.4081/ejh.2014.2371] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Accepted: 03/11/2014] [Indexed: 12/21/2022] Open
Abstract
In this review article, we describe benefits and disadvantages of the established histochemical methods for studying articular cartilage tissue under normal, pathological and experimental conditions. We illustrate the current knowledge on cartilage tissue based on histological and immunohistochemical aspects, and in conclusion we provide a short overview on the degeneration of cartilage, such as osteoarthritis. Adult articular cartilage has low capacity to repair itself, and thus even minor injuries may lead to progressive damage and osteoarthritic joint degeneration, resulting in significant pain and disability. Numerous efforts have been made to implement the knowledge in the study of cartilage in the last years, and histochemistry proved to be an especially powerful tool to this aim.
Collapse
|