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Rana D, Desai N, Salave S, Karunakaran B, Giri J, Benival D, Gorantla S, Kommineni N. Collagen-Based Hydrogels for the Eye: A Comprehensive Review. Gels 2023; 9:643. [PMID: 37623098 PMCID: PMC10454301 DOI: 10.3390/gels9080643] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/01/2023] [Accepted: 08/04/2023] [Indexed: 08/26/2023] Open
Abstract
Collagen-based hydrogels have emerged as a highly promising platform for diverse applications in ophthalmology, spanning from drug delivery systems to biomedical interventions. This review explores the diverse sources of collagen, which give rise to different types of collagen protein. The critical isolation and purification steps are discussed, emphasizing their pivotal role in preparing collagen for biomedical use. To ensure collagen quality and purity, and the suitability of collagen for targeted applications, a comprehensive characterization and quality control are essential, encompassing assessments of its physical, chemical, and biological properties. Also, various cross-linking collagen methods have been examined for providing insight into this crucial process. This comprehensive review delves into every facet of collagen and explores the wide-ranging applications of collagen-based hydrogels, with a particular emphasis on their use in drug delivery systems and their potential in diverse biomedical interventions. By consolidating current knowledge and advancements in the field, this review aims to provide a detailed overview of the utilization of engineered collagen-based hydrogels in ocular therapeutics.
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Affiliation(s)
- Dhwani Rana
- National Institute of Pharmaceutical Education and Research (NIPER), Ahmedabad 382355, Gujarat, India; (D.R.); (S.S.); (B.K.); (D.B.)
| | - Nimeet Desai
- Department of Biomedical Engineering, Indian Institute of Technology Hyderabad, Kandi 502285, Telangana, India; (N.D.); (J.G.)
| | - Sagar Salave
- National Institute of Pharmaceutical Education and Research (NIPER), Ahmedabad 382355, Gujarat, India; (D.R.); (S.S.); (B.K.); (D.B.)
| | - Bharathi Karunakaran
- National Institute of Pharmaceutical Education and Research (NIPER), Ahmedabad 382355, Gujarat, India; (D.R.); (S.S.); (B.K.); (D.B.)
| | - Jyotsnendu Giri
- Department of Biomedical Engineering, Indian Institute of Technology Hyderabad, Kandi 502285, Telangana, India; (N.D.); (J.G.)
| | - Derajram Benival
- National Institute of Pharmaceutical Education and Research (NIPER), Ahmedabad 382355, Gujarat, India; (D.R.); (S.S.); (B.K.); (D.B.)
| | - Srividya Gorantla
- Department of Biomedical Engineering, Tufts University, Medford, MA 02155, USA;
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Siadat SM, Zamboulis DE, Thorpe CT, Ruberti JW, Connizzo BK. Tendon Extracellular Matrix Assembly, Maintenance and Dysregulation Throughout Life. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1348:45-103. [PMID: 34807415 DOI: 10.1007/978-3-030-80614-9_3] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
In his Lissner Award medal lecture in 2000, Stephen Cowin asked the question: "How is a tissue built?" It is not a new question, but it remains as relevant today as it did when it was asked 20 years ago. In fact, research on the organization and development of tissue structure has been a primary focus of tendon and ligament research for over two centuries. The tendon extracellular matrix (ECM) is critical to overall tissue function; it gives the tissue its unique mechanical properties, exhibiting complex non-linear responses, viscoelasticity and flow mechanisms, excellent energy storage and fatigue resistance. This matrix also creates a unique microenvironment for resident cells, allowing cells to maintain their phenotype and translate mechanical and chemical signals into biological responses. Importantly, this architecture is constantly remodeled by local cell populations in response to changing biochemical (systemic and local disease or injury) and mechanical (exercise, disuse, and overuse) stimuli. Here, we review the current understanding of matrix remodeling throughout life, focusing on formation and assembly during the postnatal period, maintenance and homeostasis during adulthood, and changes to homeostasis in natural aging. We also discuss advances in model systems and novel tools for studying collagen and non-collagenous matrix remodeling throughout life, and finally conclude by identifying key questions that have yet to be answered.
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Affiliation(s)
| | - Danae E Zamboulis
- Institute of Life Course and Medical Sciences, Faculty of Health and Life Sciences, University of Liverpool, Liverpool, UK
| | - Chavaunne T Thorpe
- Comparative Biomedical Sciences, The Royal Veterinary College, University of London, London, UK
| | - Jeffrey W Ruberti
- Department of Bioengineering, Northeastern University, Boston, MA, USA
| | - Brianne K Connizzo
- Department of Biomedical Engineering, Boston University, Boston, MA, USA.
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Bhinder J, Agnihotri PK. Poly(vinyl alcohol) foams reinforced with carbon nanotubes for stapedial annular ligament applications. J Appl Polym Sci 2020. [DOI: 10.1002/app.48736] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Jasdeep Bhinder
- Mechanics of Advanced Material Laboratory (MAdMatLab), Department of Mechanical EngineeringIndian Institute of Technology Ropar Rupnagar 140001 Punjab India
| | - Prabhat K. Agnihotri
- Mechanics of Advanced Material Laboratory (MAdMatLab), Department of Mechanical EngineeringIndian Institute of Technology Ropar Rupnagar 140001 Punjab India
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Li S, Van Den Diepstraten C, D'Souza SJ, Chan BMC, Pickering JG. Vascular smooth muscle cells orchestrate the assembly of type I collagen via alpha2beta1 integrin, RhoA, and fibronectin polymerization. THE AMERICAN JOURNAL OF PATHOLOGY 2003; 163:1045-56. [PMID: 12937145 PMCID: PMC1868248 DOI: 10.1016/s0002-9440(10)63464-5] [Citation(s) in RCA: 124] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Assembly of collagen into fibrils is widely studied as a spontaneous and entropy-driven process. To determine whether vascular smooth muscle cells (SMCs) impact the formation of collagen fibrils, we microscopically tracked the conversion of soluble to insoluble collagen in human SMC cultures, using fluorescent type I collagen at concentrations less than that which supported self-assembly. Collagen microaggregates were found to form on the cell surface, initially as punctate collections and then as an increasingly intricate network of fibrils. These fibrils displayed 67-nm periodicity and were found in membrane-delimited cellular invaginations. Fibril assembly was inhibited by an anti-alpha2beta1 integrin antibody and accelerated by an alpha2beta1 integrin antibody that stimulates a high-affinity binding state. Newly assembled collagen fibrils were also found to co-localize with newly assembled fibronectin fibrils. Moreover, inhibition of fibronectin assembly with an anti-alpha5beta1 integrin antibody completely inhibited collagen assembly. Collagen fibril formation was also linked to the cytoskeleton. Fibrils formed on the stretched tails of SMCs, ran parallel to actin microfilament bundles, and formed poorly on SMCs transduced with retrovirus containing cDNA for dominant-negative RhoA and robustly on SMCs expressing constitutively active RhoA. Lysophosphatidic acid, which activates RhoA and stimulates fibronectin assembly, stimulated collagen fibril formation, establishing for the first time that collagen polymerization can be regulated by soluble agonists of cell function. Thus, collagen fibril formation is under close cellular control and is dynamically integrated with fibronectin assembly, opening new possibilities for modifying collagen deposition.
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Affiliation(s)
- Shaohua Li
- Robarts Research Institute (Vascular Biology Group) and London Health Science Centre, 339 Windermere Road, London, Ontario, Canada N6A 5A5
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Moore MA, Chen WM, Phillips RE, Bohachevsky IK, McIlroy BK. Shrinkage temperature versus protein extraction as a measure of stabilization of photooxidized tissue. JOURNAL OF BIOMEDICAL MATERIALS RESEARCH 1996; 32:209-14. [PMID: 8884497 DOI: 10.1002/(sici)1097-4636(199610)32:2<209::aid-jbm9>3.0.co;2-x] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A rise in thermal denaturation temperature has been utilized as an indication of stabilization of collagen-containing materials such as pericardial tissue and porcine heart-valve leaflets following treatment with glutaraldehyde, Denacol, or other chemical agents. In contrast, stabilization of bovine pericardial tissue by dye-mediated photooxidation does not result in a significant rise in shrinkage temperature comparable with these treated materials. It was therefore hypothesized that a rise in shrinkage temperature is not a necessary indication for tissue stabilization. A sensitive protein extraction assay has been developed which can be used to monitor the stabilization of pericardial tissue by a variety of treatment methods, including photooxidation. A reduction in extractable protein, as analyzed by polyacrylamide gel electrophoresis, is noted for pericardial tissue treated with photooxidation, glutaraldehyde, or Denacol. Loss of extractable protein, as a function of treatment time, correlates well with a significant rise in shrinkage temperature for pericardium treated with glutaraldehyde or Denacol but not with photooxidation. This difference is attributed to the stabilization processes of glutaraldehyde and Denacol, which involve extensive crosslinking and polymer formation within and in addition to the native pericardial matrix, leading to a rise in matrix complexity and thermal stability. In contrast, photooxidation is a catalytic process involving modification and crosslink formation within existing matrix components, resulting in a material with little added matrix complexity.
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Affiliation(s)
- M A Moore
- CarboMedics, Austin, Texas 78752-1793, USA
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Hedbom E, Heinegård D. Interaction of a 59-kDa Connective Tissue Matrix Protein with Collagen I and Collagen II. J Biol Chem 1989. [DOI: 10.1016/s0021-9258(18)83516-5] [Citation(s) in RCA: 146] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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7
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Kuijer R, van de Stadt RJ, de Koning MH, van Kampen GP, van der Korst JK. Influence of cartilage proteoglycans on type II collagen fibrillogenesis. Connect Tissue Res 1988; 17:83-97. [PMID: 3130219 DOI: 10.3109/03008208809015022] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The effects of various proteoglycan samples, isolated from human articular cartilage of different ages, on the rate of the lateral growth phase of the fibril formation of collagen type II were studied by turbidimetry. In general, proteoglycan aggregates accelerate fibrillogenesis, whereas non-aggregating proteoglycans retard this process. The only exception were non-aggregating proteoglycans from very young cartilage, which stimulated the fibril formation strongly. The extent of stimulation by proteoglycans from hip and knee cartilage were compared. The effects of non-aggregating proteoglycans dominate those of aggregated proteoglycans. Chondroitinase ABC digestion of proteoglycan samples did not change the effects on the fibrillogenesis of collagen type II, when these samples were isolated from 18 years-old knee cartilage. The collagen fibril formation was less stimulated in the presence of ABC-ase digested proteoglycan samples from 0-3 month-old knee cartilage, suggesting a primary role for keratan sulphate and a possible influence of chondroitin sulphate when keratan sulphate is not present. Only proteoglycans from very old cartilage were able to reduce the amount of collagen fibrils formed in vitro. Proteoglycans could not be detected bound to the fibril pellet despite the fact that part of the pellet was not dissolvable in acetic acid. It is concluded that proteoglycans may play a regulatory role in collagen type II fibril formation in articular cartilage.
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Affiliation(s)
- R Kuijer
- Jan van Breemen Institute, Centre for Rheumatology and Rehabilitation, Amsterdam, The Netherlands
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Ronzon JC. Characterization of acid-soluble type I collagen in solution by viscosity measurements. I. Some evidence about adsorption on the glass material and about electrostatic and ionic bondings in the molecular self assembly process. COLLAGEN AND RELATED RESEARCH 1987; 7:201-14. [PMID: 3652660 DOI: 10.1016/s0174-173x(87)80010-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The evidence of a adsorption phenomenon of the acid-soluble collagen molecules on the glass material is shown. A way of calculation is proposed from viscosimetric measurements. It could be pointed out that a small amount corresponding to 4 to 5% of the collagenous concentration is involved in such a adsorption process, at 25 degrees C. This adsorption phenomenon is temperature-dependent and weakened by a previous NaOH-treatment of the collagen solutions. It is confirmed that intermolecular associations may take place in acidic conditions and they are minimized for a pH range corresponding to the pK area of aspartic and glutamic acid residues. The influence of temperature showed that ionic interactions are reinforced by hydrophobic effects. The modification of the ionization and the removal of the telopeptidic regions from the native molecules are responsible for the decrease in these associations. On the other hand, it was shown that the relative flexibility of the molecule may explain the modifications in the (eta) values depending on the pH and ionic-strength conditions for the molecular solutions.
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Affiliation(s)
- J C Ronzon
- Laboratoire d'Etudes des Matériaux Plastiques et des Biomatériaux I, I.S.I.D.T., Université Claude Bernard, Lyon, France
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Payne KJ, King TA, Holmes DF. Collagen fibrillogenesis in vitro: an investigation of the thermal memory effect and of the early events occurring during fibril assembly using dynamic light scattering. Biopolymers 1986; 25:1185-207. [PMID: 3741991 DOI: 10.1002/bip.360250703] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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10
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Parry DA, Flint MH, Gillard GC, Craig AS. A role for glycosaminoglycans in the development of collagen fibrils. FEBS Lett 1982; 149:1-7. [PMID: 6759170 DOI: 10.1016/0014-5793(82)81060-0] [Citation(s) in RCA: 100] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Extensive data on the glycosaminoglycan (GAG) composition and the collagen fibril diameter distribution have been collected for a diverse range of connective tissues. It is shown that tissues with the smallest diameter collagen fibrils (mass-average diameter less than 60 nm) have high concentrations of hyaluronic acid and that tissues with the largest diameter collagen fibrils (mass-average diameter approximately 200 nm) have high concentrations of dermatan sulphate. It is suggested that the lateral growth of fibrils beyond a diameter of about 60 nm is inhibited by the presence of an excess of hyaluronic acid but that this inhibitory effect may be removed by an increasing concentration of chondroitin sulphate and/or dermatan sulphate. It is also postulated that high concentrations of chondroitin sulphate will inhibit fibril growth beyond a mass-average diameter of approximately 150 nm. Such an inhibition may in turn be removed by an increasing concentration of dermatan sulphate such that it becomes the dominant GAG present in the tissue.
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11
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Vidal BC, Mello ML, Pimentel ER. Polarization microscopy and microspectrophotometry of Sirius Red, Picrosirius and Chlorantine Fast Red aggregates and of their complexes with collagen. THE HISTOCHEMICAL JOURNAL 1982; 14:857-78. [PMID: 6184330 DOI: 10.1007/bf01005229] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
A detailed quantitative analysis of the anisotropic properties of Sirius Red F3B, Picrosirius, and Chlorantine Fast Red crystals, and of their complexes with a macromolecularly oriented protein either in a pure form or as part of a tissue structure was carried out. Collagen I was used as the protein model. Linear dichroism and dispersion of birefringence were investigated in dye aggregates, in stained filaments of collagen I and in collagen bundles in sections of tendon. A positive linear dichroism, the characteristics of which varied as a function of the dye type used, was demonstrated for the dye aggregates and stained substrates. However, even thin regions of the stained tendon collagen bundles showed very high absorbances, differing from the pattern reported previously for collagen stained with another sulphonated azo dye, Xylidine Ponceau. Consequently, not all these dyes enable protein concentration and orientation to be determined in collagen-containing structures. From the linear dichroism patterns it is assumed that the long axis of the molecules of these azo dyes is mostly parallel to that of filaments of pure collagen I and statistically parallel to the long axis of collagen bundles of tendon sections. The dye aggregates and, stained pure collagen I and tendon collagen bundles exhibited birefringent images with interference colours that varied as a function of thickness and packing state of the preparations, which is in agreement with reports in the literature. The optical retardations of the collagen bundles increased by a factor of 5-6 times after staining with Picrosirius. From data on form dichroism it is concluded that when studying the macromolecular orientation of collagen preparations stained with azo dyes, the choice of the mounting medium deserves consideration.
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12
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Cetta G, Tenni R, Zanaboni G, De Luca G, Ippolito E, De Martino C, Castellani AA. Biochemical and morphological modifications in rabbit Achilles tendon during maturation and ageing. Biochem J 1982; 204:61-7. [PMID: 7115331 PMCID: PMC1158315 DOI: 10.1042/bj2040061] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
1. Achilles tendons of foetal, newborn, adult and old rabbits were examined by electron microscopy after staining by conventional methods or with the periodate/silver/methenamine technique. 2. The mean diameter of collagen fibrils increased with age whereas silver/methenamine-positivity became less evident. 3. Biochemical analyses showed a great decrease of the concentration of glycoproteins and galactosamine-containing glycosaminoglycans. 4. Collagen content increased with maturation and ageing of the tissue. 5. The extent of glycosylation of collagen hydroxylysine residues was also age-dependent; the total amount of hydroxylysyl glycosides rapidly decreased in the last days of prenatal life and in the first months after birth, corresponding to the rapid growth in collagen fibre diameter. 6. The hydroxylysyl diglycoside concentration decreased more markedly than that of the monoglycoside, thus indicating a possible gradual removal of the monosaccharide units. A role for the extent of glycosylation of tropocollagen molecules in fibre organization was suggested.
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13
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Helseth D, Veis A. Collagen self-assembly in vitro. Differentiating specific telopeptide-dependent interactions using selective enzyme modification and the addition of free amino telopeptide. J Biol Chem 1981. [DOI: 10.1016/s0021-9258(19)68934-9] [Citation(s) in RCA: 175] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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14
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Aterman K. Connective tissue: an eclectic historical review with particular reference to the liver. THE HISTOCHEMICAL JOURNAL 1981; 13:341-96. [PMID: 7019165 DOI: 10.1007/bf01005055] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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15
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Suarez G, Veliz M, Nagel RL. Role of hydrophobic interactions in collagen fibril formation: effect of alkylureas in vitro. Arch Biochem Biophys 1980; 205:422-7. [PMID: 7469419 DOI: 10.1016/0003-9861(80)90125-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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16
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Gelman RA, Conn KM, Termine JD. The effects of phosphoproteins on collagen self-assembly in tail tendon and incision dentin from rats. BIOCHIMICA ET BIOPHYSICA ACTA 1980; 630:220-4. [PMID: 7388050 DOI: 10.1016/0304-4165(80)90424-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Phosphoproteins retard the rate at which collagen molecules undergo self-assembly into fibrils. The inhibition appears to be dependent on the amount of phosphoprotein present, with increasing phosphoprotein concentrations resulting in greater inhibition. Prior treatment of the phosphoprotein with calcium markedly increases the resultant inhibitory effect. Dentin phosphoproteins are considerably more effective than phosvitin in retarding collagen self-assembly, with retardation times for these hard tissue extracellular matrix proteins being 25-30 times greater than control values.
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Alexander SA, Swerdloff M. Mucopolysaccharidase activity and glycosaminoglycan content in traumatized resorbing deciduous teeth. J Dent Res 1980; 59:766-70. [PMID: 6245117 DOI: 10.1177/00220345800590050301] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
The periodontal ligaments from traumatized deciduous teeth, while undergoing rapid resorption, were analyzed biochemically for mucopolysaccharidase activity and for total glycosaminoglycan content of dentin and cementum. Enzyme activity was present only in resorbing teeth. A concomitant 65 percent decrease in glycosaminoglycans from these teeth occurred as well.
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19
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Alexander SA, Swerdloff M. Mucopolysaccharidase activity in traumatized human deciduous teeth undergoing accelerated resorption: isolation and characterization. JOURNAL OF ORAL PATHOLOGY 1980; 9:121-8. [PMID: 6776246 DOI: 10.1111/j.1600-0714.1980.tb00368.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Mucopolysaccharidase activity was observed in traumatized human decidous teeth. Histochemical analysis of the periodontal ligaments from these teeth revealed a loss of film substrate metachromasia during incubation, indicating enzyme activity. Routine histology of these ligaments showed the presence of an inflammatory infiltrate throughout this tissue. Biochemical analysis of the ligaments revealed a 10-fold increase of enzyme activity when incubation time was increased from 1 to 8 h. When compared to the enzyme activity measured during physiologic resorption, activity was increased. This suggests that the presence of an inflammatory infiltrate not observed in the tissues undergoing physiologic resorption may be responsible for the rapid resorption seen in traumatized deciduous teeth.
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Snowden JM, Swann DA. Effects of glycosaminoglycans and proteoglycan on thein vitro assembly and thermal stability of collagen fibrils. Biopolymers 1980. [DOI: 10.1002/bip.1980.360190405] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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21
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Alexander SA, Swerdloff M. Identification and localization of a mucopolysaccharidase in human deciduous teeth. J Dent Res 1980; 59:594-601. [PMID: 6937492 DOI: 10.1177/00220345800590030701] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
The presence of a mucopolysaccharidase in resorbing deciduous teeth was investigated using histochemical techniques. The loss of toluidine blue metachromasia within glycosaminoglycan film substrates indicated the presence of enzyme activity, and was related to physiologic resorption. Such activity was localized to the periodontal ligament of these teeth.
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22
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Helseth DL, Lechner JH, Veis A. Role of the amino-terminal extrahelical region of type I collagen in directing the 4D overlap in fibrillogenesis. Biopolymers 1979. [DOI: 10.1002/bip.1979.360181208] [Citation(s) in RCA: 96] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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23
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Snowden JM, Swann DA. The formation and thermal stability of in vitro assembled fibrils from acid-soluble and pepsin-treated collagens. BIOCHIMICA ET BIOPHYSICA ACTA 1979; 580:372-81. [PMID: 42446 DOI: 10.1016/0005-2795(79)90149-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The role of the non-helical regions of the collagen molecule in fibrillogenesis has been investigated by comparing the kinetics of fibril formation of pepsin-treated acid-soluble collagen, acid-soluble collagen and mixtures of the two and by comparison of the thermal stabilities of the fibrils formed. The acid-soluble collagen was found to aggregate more rapidly than the pepsin-treated collagen under physiological conditions of pH and ionic strength. Variations in ionic strength, at physiological pH, were found to have differing effects on the aggregation of these two forms of soluble collagen. Fibrils formed from the pepsinized-collagen had a lower thermal stability tha n those formed from the intact collagen. The behavior observed with mixtures of acid-soluble and pepsin-treated collagens was found to be quantitatively consistent with the pepsinized collagen being able to utilize the nuclei formed by the acid-soluble collagen for subsequent growth. However, the use of the acid-soluble nuclei by the pepsinized collagen for growth did not enhance its rate of precipitation during the growth phase, nor did it enhance the thermal stability of the fibrils formed from the pepsinized collagen.
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24
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Holmes DF, Chapman JA. Axial mass distributions of collagen fibrils grown in vitro: results for the end regions of early fibrils. Biochem Biophys Res Commun 1979; 87:993-9. [PMID: 465040 DOI: 10.1016/s0006-291x(79)80005-4] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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25
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Alexander SA, Swerdloff M. Mucopolysaccharidase activity during human deciduous root resorption. Arch Oral Biol 1979; 24:735-8. [PMID: 295600 DOI: 10.1016/0003-9969(79)90032-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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26
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Williams B, Gelman R, Poppke D, Piez K. Collagen fibril formation. Optimal in vitro conditions and preliminary kinetic results. J Biol Chem 1978. [DOI: 10.1016/s0021-9258(19)46970-6] [Citation(s) in RCA: 373] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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27
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Adam M, Vitásek R, Deyl Z, Felsch G, Musilová J, Olsovská Z. Collagen in rheumatoid arthritis. Clin Chim Acta 1976; 70:61-9. [PMID: 947624 DOI: 10.1016/0009-8981(76)90005-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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28
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29
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30
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Lowther DA, Natarajan M. The influence of glycoprotein on collagen fibril formation in the presence of chondroitin sulphate proteoglycan. Biochem J 1972; 127:607-8. [PMID: 5076205 PMCID: PMC1178702 DOI: 10.1042/bj1270607] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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31
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Bonucci E, Nardi F. The cloverleaf skull syndrome. Histological, histochemical and ultrastructural findings. VIRCHOWS ARCHIV. A, PATHOLOGY. PATHOLOGISCHE ANATOMIE 1972; 357:199-212. [PMID: 4628838 DOI: 10.1007/bf00542847] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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32
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