Cartilage & Bone
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Applications of Chondrocyte-Based Cartilage Engineering: an Overview
Hindawi Publishing Corporation BioMed Research International Volume 2016, Article ID 1879837, 17 pages http://dx.doi.org/10.1155/2016/1879837 Review Article Applications of Chondrocyte-Based Cartilage Engineering: An Overview Abdul-Rehman Phull,1 Seong-Hui Eo,1 Qamar Abbas,1 Madiha Ahmed,2 and Song Ja Kim1 1 Department of Biological Sciences, College of Natural Sciences, Kongju National University, Gongjudaehakro 56, Gongju 32588, Republic of Korea 2Department of Pharmacy, Quaid-i-Azam University, Islamabad 45320, Pakistan Correspondence should be addressed to Song Ja Kim; [email protected] Received 14 May 2016; Revised 24 June 2016; Accepted 26 June 2016 Academic Editor: Magali Cucchiarini Copyright © 2016 Abdul-Rehman Phull et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Chondrocytes are the exclusive cells residing in cartilage and maintain the functionality of cartilage tissue. Series of biocomponents such as different growth factors, cytokines, and transcriptional factors regulate the mesenchymal stem cells (MSCs) differentiation to chondrocytes. The number of chondrocytes and dedifferentiation are the key limitations in subsequent clinical application of the chondrocytes. Different culture methods are being developed to overcome such issues. Using tissue engineering and cell based approaches, chondrocytes offer prominent therapeutic option specifically in orthopedics for cartilage repair and to treat ailments such as tracheal defects, facial reconstruction, and urinary incontinence. Matrix-assisted autologous chondrocyte transplantation/implantation is an improved version of traditional autologous chondrocyte transplantation (ACT) method. An increasing number of studies show the clinical significance of this technique for the chondral lesions treatment. -
Osteocyte Dysfunction Promotes Osteoarthritis Through MMP13-Dependent Suppression of Subchondral Bone Homeostasis
Bone Research www.nature.com/boneres ARTICLE OPEN Osteocyte dysfunction promotes osteoarthritis through MMP13-dependent suppression of subchondral bone homeostasis Courtney M. Mazur1,2, Jonathon J. Woo 1, Cristal S. Yee1, Aaron J. Fields 1, Claire Acevedo1,3, Karsyn N. Bailey1,2, Serra Kaya1, Tristan W. Fowler1, Jeffrey C. Lotz1,2, Alexis Dang1,4, Alfred C. Kuo1,4, Thomas P. Vail1 and Tamara Alliston1,2 Osteoarthritis (OA), long considered a primary disorder of articular cartilage, is commonly associated with subchondral bone sclerosis. However, the cellular mechanisms responsible for changes to subchondral bone in OA, and the extent to which these changes are drivers of or a secondary reaction to cartilage degeneration, remain unclear. In knee joints from human patients with end-stage OA, we found evidence of profound defects in osteocyte function. Suppression of osteocyte perilacunar/canalicular remodeling (PLR) was most severe in the medial compartment of OA subchondral bone, with lower protease expression, diminished canalicular networks, and disorganized and hypermineralized extracellular matrix. As a step toward evaluating the causality of PLR suppression in OA, we ablated the PLR enzyme MMP13 in osteocytes while leaving chondrocytic MMP13 intact, using Cre recombinase driven by the 9.6-kb DMP1 promoter. Not only did osteocytic MMP13 deficiency suppress PLR in cortical and subchondral bone, but it also compromised cartilage. Even in the absence of injury, osteocytic MMP13 deficiency was sufficient to reduce cartilage proteoglycan content, change chondrocyte production of collagen II, aggrecan, and MMP13, and increase the 1234567890();,: incidence of cartilage lesions, consistent with early OA. Thus, in humans and mice, defects in PLR coincide with cartilage defects. -
Osteocyte Differentiation and the Formation of an Interconnected Cellular Network in Vitro
EuropeanMJ Mc Garrigle Cells and et alMaterials. Vol. 31 2016 (pages 323-340) DOI: 10.22203/eCM.v031a21Formation of an interconnected osteocyte ISSN 1473-2262 network OSTEOCYTE DIFFERENTIATION AND THE FORMATION OF AN INTERCONNECTED CELLULAR NETWORK IN VITRO M.J. Mc Garrigle1, C.A. Mullen1, M.G. Haugh1, M.C. Voisin1 and L.M. McNamara1* 1 Centre for Biomechanics Research (BMEC), Biomedical Engineering, College of Engineering and Informatics, National University of Ireland, Galway Abstract Introduction Extracellular matrix (ECM) stiffness and cell density can In bone, osteocyte cells form a complex three-dimensional regulate osteoblast differentiation in two dimensional (3D) communication network that plays a vital role in environments. However, it is not yet known how maintaining bone health by monitoring physical cues osteoblast-osteocyte differentiation is regulated within a arising during load-bearing activity and directing the 3D ECM environment, akin to that existing in vivo. In this activity of osteoblasts and osteoclasts to initiate bone study we test the hypothesis that osteocyte differentiation is formation and resorption (Burger and Klein-Nulend, 1999). regulated by a 3D cell environment, ECM stiffness and cell Osteocytes are formed when cuboidal-like osteoblasts density. We encapsulated MC3T3-E1 pre-osteoblastic cells become embedded within soft secreted osteoid and start to at varied cell densities (0.25, 1 and 2 × 106 cells/mL) within change morphologically to a dendritic shape characteristic microbial transglutaminase (mtgase) gelatin hydrogels of an osteocyte. This transition is accompanied by a loss of low (0.58 kPa) and high (1.47 kPa) matrix stiffnesses. of cell volume (reduced organelle content) (Knothe Tate Cellular morphology was characterised from phalloidin- et al., 2004; Palumbo et al., 2004) and an increase in the FITC and 4’,6-diamidino-2-phenylindole (DAPI) dilactate formation and elongation of thin cytoplasmic projections staining. -
Bone & Cartilage
Compiled and circulated by Mr. Suman Kalyan Khanra, SACT, Dept. of Physiology, Narajole Raj college BONE & CARTILAGE (Structure, Function, Classification of BONE & CARTILAGE) BY Suman Kalyan Khanra SACT Department of Physiology NARAJOLE RAJ COLLEGE Narajole; Paschim Medinipur 1 | P a g e ZOOLOGY: SEM-III, Paper-C6T: Animal Physiology, Unit-2: Bone & Cartilage Compiled and circulated by Mr. Suman Kalyan Khanra, SACT, Dept. of Physiology, Narajole Raj college BONE Definition: A bone is a somatic structure that is comprised of calcified connective tissue. Ground substance and collagen fibers create a matrix that contains osteocytes. These cells are the most common cell found in mature bone and responsible for maintaining bone growth and density. Within the bone matrix both calcium and phosphate are abundantly stored, strengthening and densifying the structure. Each bone is connected with one or more bones and are united via a joint (only exception: hyoid bone). With the attached tendons and musculature, the skeleton acts as a lever that drives the force of movement. The inner core of bones (medulla) contains either red bone marrow (primary site of hematopoiesis) or is filled with yellow bone marrow filled with adipose tissue. The main outcomes of bone development are endochondral and membranous forms. This particular characteristic along with the general shape of the bone are used to classify the skeletal system. The main shapes that are recognized include: long short flat sesamoid irregular Types of bone Long bones These bones develop via endochondral ossification, a process in which the hyaline cartilage plate is slowly replaced. A shaft, or diaphysis, connects the two ends known as the epiphyses (plural for epiphysis). -
Histologia Animal
Índex de termes castellans Índex de termes anglesos ácido hialurónico, 1 eosinófi lo, 38 líquido cerebroespinal, 73 proteína estructural, 115 adhesive protein, 114 ectodermic, 33 leucocyte, 59 oogenesis, 105 adipocito, 2 epitelio, 39 macrófago, 74 proteoglucano, 116 adipose tissue, 129 elastic cartilage, 15 leukocyte, 59 osseous tissue, 134 agranulocito, 3 epitelio estratifi cado, 40 mastocito, 75 receptor, 117 adypocite, 2 elastin, 34 lymphocyte, 71 ossifi cation, 107 amielínico –ca, 4 epitelio seudoestratifi cado, 41 matriz extracelular, 76 retículo sarcoplasmático, 118 agranulocyte, 3 electrical synapse, 123 lymphocytopoiesis, 72 osteoblast, 108 amígdala, 5 epitelio simple, 42 medula, 77 sangre, 119 amyelinic, 4 endochondral, 35 lymphoid organs, 106 osteoclast, 110 anticuerpo, 6 eritrocito, 43 médula, 77 sarcómero, 120 amygdala, 5 endocrine gland, 55 lymphopoiesis, 72 osteocyte, 109 APC, 23 eritropoyesis, 44 médula ósea amarilla, 78 sinapsis, 122 animal histology, 66 endoderm, 36 macrophage, 74 peripheral nervous system, 127 axón, 7 espermatogénesis, 45 médula ósea roja, 79 sinapsis eléctrica, 123 antibody, 6 endodermal, 37 marrow, 77 plasma, 112 barrera hematoencefálica, 8 estereocilio, 46 megacariocito, 80 sinapsis química, 124 antigen-presenting cell, 23 endodermic, 37 mast cell, 75 plasma cell, 22 basófi lo –la, 9 fecundación, 47 megacariocitopoyesis, 81 sistema inmunitario, 125 APC, 23 eosinophil, 38 mastocyte, 75 plasmacyte, 22 bazo, 82 fi bra muscular, 48 memoria inmunitaria, 83 sistema nervioso central, 126 axon, 7 eosinophile, 38 -
Differentiation of the Secondary Elastic Cartilage in the External Ear of the Rat
Int..I. Dc\'. Bi,,!. 35: 311-320 (1991) 311 Differentiation of the secondary elastic cartilage in the external ear of the rat ZELIMIR BRADAMANTE*', LJILJANA KOSTOVIC-KNEZEVIC', BOZICA LEVAK-SVAJGER' and ANTON SVAJGER' 'Institute of Histology and Embryology and 2/nstitute of Biology, Faculty of Medicine, University of Zagreb, Republic of Croatia, Yugoslavia ABSTRACT The cartilage in the external ear of the rat belongs to the group of secondary cartilages and it has a unique structural organization. The chondrocytes aretransformed intotypical adipose cells, the proteoglycan cartilage matrix is reduced to thin capsules around the cells and the rest of the extracelullar matrix is occupied by a network of coarse elastic fibers. It appears late in development 116-day fetus) and needs more than one month for final development. The differentiation proceeds in several steps which partly overlap: the appearance of collagen fibrils, elastin fibers, the proteoglycan matrix, and the adipose transformation of chondrocytes. The phenotype of this cartilage and the course of its differentiation are very stable, even in very atypical experimental environmental conditions. The only exceptions are explants in organ culture in vitro and perichondrial regenerates. In these conditions the development of elastic fibers is slow and poor while the production of the proteogycan matrix is abundant. The resulting cartilage then displays structural characteristics of hyaline cartilage rather than those of the initial elastic one. KEY WORDS: elastic mrlilagf, tI/(Wdrogfllt'.\'i.\. plasfogellf'.\is, extenuil Ntr, rat Introduction Structural organization The elastic cartilage belongs to the group of secondary or ac- According to Baecker (1928) and Schaffer (1930) the cartilage cessory cartilages since it is not a part of the cartilagineous in the external ear (external auditory meatus and pinna) of the rat primordium of the body skeleton as is most hyaline cartilage can be defined as: a) cellular or parenchymatous, [jecause of the (Schaffer, 1930). -
16 Cartilage
Cartilage Cartilage serves as a rigid yet lightweight and flexible supporting tissue. It forms the framework for the respiratory passages to prevent their collapse, provides smooth "bearings" at joints, and forms a cushion between the vertebrae, acting as a shock absorber for the spine. Cartilage is important in determining the size and shape of bones and provides the growing areas in many bones. Its capacity for rapid growth while maintaining stiffness makes cartilage suitable for the embryonic skeleton. About 75% of the water in cartilage is bound to proteoglycans, and these compounds are important in the transport of fluids, electrolytes, and nutrients throughout the cartilage matrix. Although adapted to provide support, cartilage contains only the usual elements of connective tissue cells, fibers, and ground substance. It is the ground substance that gives cartilage its firm consistency and ability to withstand compression and shearing forces. Collagen and elastic fibers embedded in the ground substance impart tensile strength and elasticity. Together, the fibers and ground substance form the matrix of cartilage. Cartilage differs from other connective tissues in that it lacks nerves, blood and lymphatic vessels and is nourished entirely by diffusion of materials from blood vessels in adjacent tissues. Although relatively rigid, the cartilage matrix has high water content and is freely permeable, even to fairly large particles. Classification of cartilage into hyaline, elastic, and fibrous types is based on differences in the abundance and type of fibers in the matrix. Hyaline Cartilage Hyaline cartilage is the most common type of cartilage and forms the costal cartilages, articular cartilages of joints, and cartilages of the nose, larynx, trachea, and bronchi. -
Nomina Histologica Veterinaria, First Edition
NOMINA HISTOLOGICA VETERINARIA Submitted by the International Committee on Veterinary Histological Nomenclature (ICVHN) to the World Association of Veterinary Anatomists Published on the website of the World Association of Veterinary Anatomists www.wava-amav.org 2017 CONTENTS Introduction i Principles of term construction in N.H.V. iii Cytologia – Cytology 1 Textus epithelialis – Epithelial tissue 10 Textus connectivus – Connective tissue 13 Sanguis et Lympha – Blood and Lymph 17 Textus muscularis – Muscle tissue 19 Textus nervosus – Nerve tissue 20 Splanchnologia – Viscera 23 Systema digestorium – Digestive system 24 Systema respiratorium – Respiratory system 32 Systema urinarium – Urinary system 35 Organa genitalia masculina – Male genital system 38 Organa genitalia feminina – Female genital system 42 Systema endocrinum – Endocrine system 45 Systema cardiovasculare et lymphaticum [Angiologia] – Cardiovascular and lymphatic system 47 Systema nervosum – Nervous system 52 Receptores sensorii et Organa sensuum – Sensory receptors and Sense organs 58 Integumentum – Integument 64 INTRODUCTION The preparations leading to the publication of the present first edition of the Nomina Histologica Veterinaria has a long history spanning more than 50 years. Under the auspices of the World Association of Veterinary Anatomists (W.A.V.A.), the International Committee on Veterinary Anatomical Nomenclature (I.C.V.A.N.) appointed in Giessen, 1965, a Subcommittee on Histology and Embryology which started a working relation with the Subcommittee on Histology of the former International Anatomical Nomenclature Committee. In Mexico City, 1971, this Subcommittee presented a document entitled Nomina Histologica Veterinaria: A Working Draft as a basis for the continued work of the newly-appointed Subcommittee on Histological Nomenclature. This resulted in the editing of the Nomina Histologica Veterinaria: A Working Draft II (Toulouse, 1974), followed by preparations for publication of a Nomina Histologica Veterinaria. -
The Osteocyte: from “Prisoner” to “Orchestrator”
Journal of Functional Morphology and Kinesiology Review The Osteocyte: From “Prisoner” to “Orchestrator” Carla Palumbo * and Marzia Ferretti Section of Human Morphology, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, 41124 Modena, Italy; [email protected] * Correspondence: [email protected] Abstract: Osteocytes are the most abundant bone cells, entrapped inside the mineralized bone matrix. They derive from osteoblasts through a complex series of morpho-functional modifications; such modifications not only concern the cell shape (from prismatic to dendritic) and location (along the vascular bone surfaces or enclosed inside the lacuno-canalicular cavities, respectively) but also their role in bone processes (secretion/mineralization of preosseous matrix and/or regulation of bone remodeling). Osteocytes are connected with each other by means of different types of junctions, among which the gap junctions enable osteocytes inside the matrix to act in a neuronal-like manner, as a functional syncytium together with the cells placed on the vascular bone surfaces (osteoblasts or bone lining cells), the stromal cells and the endothelial cells, i.e., the bone basic cellular system (BBCS). Within the BBCS, osteocytes can communicate in two ways: by means of volume transmission and wiring transmission, depending on the type of signals (metabolic or mechanical, respectively) received and/or to be forwarded. The capability of osteocytes in maintaining skeletal and mineral homeostasis is due to the fact that it acts as a mechano-sensor, able to transduce mechanical strains into biological signals and to trigger/modulate the bone remodeling, also because of the relevant role of sclerostin secreted by osteocytes, thus regulating different bone cell signaling pathways. -
Insulin-Like Growth Factors: Actions on the Skeleton
61 1 Journal of Molecular S Yakar et al. IGFs and bone 61:1 T115–T137 Endocrinology THEMATIC REVIEW 40 YEARS OF IGF1 Insulin-like growth factors: actions on the skeleton Shoshana Yakar1, Haim Werner2 and Clifford J Rosen3 1David B. Kriser Dental Center, Department of Basic Science and Craniofacial Biology, New York University College of Dentistry, New York, New York, USA 2Department of Human Molecular Genetics and Biochemistry, Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel 3Maine Medical Center Research Institute, Scarborough, Maine, USA Correspondence should be addressed to S Yakar: [email protected] This paper forms part of a special section on 40 years of IGF1. The guest editors for this section were Derek LeRoith and Emily Gallagher. Abstract The discovery of the growth hormone (GH)-mediated somatic factors (somatomedins), Key Words insulin-like growth factor (IGF)-I and -II, has elicited an enormous interest primarily f insulin-like among endocrinologists who study growth and metabolism. The advancement of f osteoblast molecular endocrinology over the past four decades enables investigators to re-examine f osteoclast and refine the established somatomedin hypothesis. Specifically, gene deletions, f osteocyte transgene overexpression or more recently, cell-specific gene-ablations, have enabled f chondrocyte investigators to study the effects of the Igf1 and Igf2 genes in temporal and spatial manners. The GH/IGF axis, acting in an endocrine and autocrine/paracrine fashion, is the major axis controlling skeletal growth. Studies in rodents have clearly shown that IGFs regulate bone length of the appendicular skeleton evidenced by changes in chondrocytes of the proliferative and hypertrophic zones of the growth plate. -
Índice De Denominacións Españolas
VOCABULARIO Índice de denominacións españolas 255 VOCABULARIO 256 VOCABULARIO agente tensioactivo pulmonar, 2441 A agranulocito, 32 abaxial, 3 agujero aórtico, 1317 abertura pupilar, 6 agujero de la vena cava, 1178 abierto de atrás, 4 agujero dental inferior, 1179 abierto de delante, 5 agujero magno, 1182 ablación, 1717 agujero mandibular, 1179 abomaso, 7 agujero mentoniano, 1180 acetábulo, 10 agujero obturado, 1181 ácido biliar, 11 agujero occipital, 1182 ácido desoxirribonucleico, 12 agujero oval, 1183 ácido desoxirribonucleico agujero sacro, 1184 nucleosómico, 28 agujero vertebral, 1185 ácido nucleico, 13 aire, 1560 ácido ribonucleico, 14 ala, 1 ácido ribonucleico mensajero, 167 ala de la nariz, 2 ácido ribonucleico ribosómico, 168 alantoamnios, 33 acino hepático, 15 alantoides, 34 acorne, 16 albardado, 35 acostarse, 850 albugínea, 2574 acromático, 17 aldosterona, 36 acromatina, 18 almohadilla, 38 acromion, 19 almohadilla carpiana, 39 acrosoma, 20 almohadilla córnea, 40 ACTH, 1335 almohadilla dental, 41 actina, 21 almohadilla dentaria, 41 actina F, 22 almohadilla digital, 42 actina G, 23 almohadilla metacarpiana, 43 actitud, 24 almohadilla metatarsiana, 44 acueducto cerebral, 25 almohadilla tarsiana, 45 acueducto de Silvio, 25 alocórtex, 46 acueducto mesencefálico, 25 alto de cola, 2260 adamantoblasto, 59 altura a la punta de la espalda, 56 adenohipófisis, 26 altura anterior de la espalda, 56 ADH, 1336 altura del esternón, 47 adipocito, 27 altura del pecho, 48 ADN, 12 altura del tórax, 48 ADN nucleosómico, 28 alunarado, 49 ADNn, 28 -
Variations in the Appearance of Human Elastic Cartilage1
366 DONALD R. GEIGER Vol. 69 VARIATIONS IN THE APPEARANCE OF HUMAN ELASTIC CARTILAGE1 MARTHA E. (WELCH) SUCHESTON AND MARVIN S. CANNON Department of Anatomy, College of Medicine, The Ohio State University, Columbus, Ohio ABSTRACT Cartilage from the external ear, epiglottis, and auditory tube from 22 adult human cadavers, ranging in age from 52 to 64 years, and from seven newborn infants was examined microscopically to ascertain any morphological differences in structure. All cartilages from the newborn infants were hyaline, showing evenly dispersed chondrocytes and lack of elastic fibers, with the exception of the epiglottic cartilage, which possessed a few such fibers at this stage. In adult cartilages, the presence or absence and location of young growing, mature, and/or calcined chondrocytes is described. All cartilages had a PAS-positive matrix. The distribution of elastic fibers is denned. The differences in adult human cartilages are summarized and lead us to suggest the term elastoid as the name for the cartilage of the auditory tube. INTRODUCTION Elastic cartilage occurs in only a few places in the human body: (1) external ear, (2) epiglottis, (3) auditory tube, and (4) some laryngeal and bronchiolar cartilages (Bailey, 1964; Bloom and Fawcett, 1968). Investigators (Urbants- ]Manuscript received November 21, 1968. THE OHIO JOURNAL OF SCIENCE 69(6): 366, November, 1969. No. 6 HUMAN ELASTIC CARTILAGE 367 chitsch, 1884; Citelli, 1905; Bryant, 1907; Graves and Edwards, 1944) have presented varying opinions as to the microscopic appearance and structure of the hook of cartilage associated with the auditory tube. Urbantschitsch (1884) believed that the tubal cartilage changed with age: in children it was hyaline with an even distribution of chondrocytes; in contrast, in adults the chondrocytes were grouped into island-like clusters surrounded by elastic fibers.