Extracellular Matrix Deposition in Engineered Micromass Cartilage Pellet Cultures: Measurements and Modelling

This article explores possible mechanisms governing extracellular matrix deposition in engineered cartilaginous cell pellets. A theoretical investigation is carried out alongside an experimental study measuring proteoglycan and collagen volume fractions within murine chondrogenic (ATDC-5) cell pelle...

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Veröffentlicht in:PloS one 2016-02, Vol.11 (2), p.e0147302-e0147302
Hauptverfasser: Lewis, Miranda C, MacArthur, Ben D, Tare, Rahul S, Oreffo, Richard O C, Please, Colin P
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description This article explores possible mechanisms governing extracellular matrix deposition in engineered cartilaginous cell pellets. A theoretical investigation is carried out alongside an experimental study measuring proteoglycan and collagen volume fractions within murine chondrogenic (ATDC-5) cell pellets. The simple mathematical model, which adopts a nutrient-dependent proteoglycan production rate, successfully reproduces the periphery-dominated proteoglycan deposition, characteristic of the growth pattern observed experimentally within pellets after 21 days of culture. The results suggest that this inhomogeneous proteoglycan production is due to nutrient deficiencies at the pellet centre. Our model analysis further indicates that a spatially uniform distribution of proteoglycan matrix could be maintained by initiating the culture process with a smaller-sized pellet. Finally, possible extensions are put forward with an aim to improve the model predictions for the early behaviour, where different mechanisms appear to dominate the matrix production within the pellets.
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A theoretical investigation is carried out alongside an experimental study measuring proteoglycan and collagen volume fractions within murine chondrogenic (ATDC-5) cell pellets. The simple mathematical model, which adopts a nutrient-dependent proteoglycan production rate, successfully reproduces the periphery-dominated proteoglycan deposition, characteristic of the growth pattern observed experimentally within pellets after 21 days of culture. The results suggest that this inhomogeneous proteoglycan production is due to nutrient deficiencies at the pellet centre. Our model analysis further indicates that a spatially uniform distribution of proteoglycan matrix could be maintained by initiating the culture process with a smaller-sized pellet. Finally, possible extensions are put forward with an aim to improve the model predictions for the early behaviour, where different mechanisms appear to dominate the matrix production within the pellets.</description><identifier>ISSN: 1932-6203</identifier><identifier>EISSN: 1932-6203</identifier><identifier>DOI: 10.1371/journal.pone.0147302</identifier><identifier>PMID: 26889833</identifier><language>eng</language><publisher>United States: Public Library of Science</publisher><subject>Analysis ; Animals ; Arthritis ; Biology and Life Sciences ; Cartilage ; Cartilage, Articular - cytology ; Cartilage, Articular - metabolism ; Cell culture ; Cell Culture Techniques ; Cell Differentiation ; Cell Line ; Chondrocytes - cytology ; Chondrocytes - metabolism ; Collagen ; Collagen - biosynthesis ; Deposition ; Extracellular matrix ; Extracellular Matrix - metabolism ; Growth factors ; Mathematical analysis ; Mathematical models ; Matrix methods ; Measurement ; Medicine and Health Sciences ; Mice ; Models, Statistical ; Nutrients ; Pellets ; Physical Sciences ; Polymers ; Proteoglycans ; Proteoglycans - biosynthesis ; Stem cells ; Studies ; Tissue engineering ; Tissue Engineering - methods ; Transplants &amp; implants</subject><ispartof>PloS one, 2016-02, Vol.11 (2), p.e0147302-e0147302</ispartof><rights>COPYRIGHT 2016 Public Library of Science</rights><rights>2016 Lewis et al. 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A theoretical investigation is carried out alongside an experimental study measuring proteoglycan and collagen volume fractions within murine chondrogenic (ATDC-5) cell pellets. The simple mathematical model, which adopts a nutrient-dependent proteoglycan production rate, successfully reproduces the periphery-dominated proteoglycan deposition, characteristic of the growth pattern observed experimentally within pellets after 21 days of culture. The results suggest that this inhomogeneous proteoglycan production is due to nutrient deficiencies at the pellet centre. Our model analysis further indicates that a spatially uniform distribution of proteoglycan matrix could be maintained by initiating the culture process with a smaller-sized pellet. 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A theoretical investigation is carried out alongside an experimental study measuring proteoglycan and collagen volume fractions within murine chondrogenic (ATDC-5) cell pellets. The simple mathematical model, which adopts a nutrient-dependent proteoglycan production rate, successfully reproduces the periphery-dominated proteoglycan deposition, characteristic of the growth pattern observed experimentally within pellets after 21 days of culture. The results suggest that this inhomogeneous proteoglycan production is due to nutrient deficiencies at the pellet centre. Our model analysis further indicates that a spatially uniform distribution of proteoglycan matrix could be maintained by initiating the culture process with a smaller-sized pellet. Finally, possible extensions are put forward with an aim to improve the model predictions for the early behaviour, where different mechanisms appear to dominate the matrix production within the pellets.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>26889833</pmid><doi>10.1371/journal.pone.0147302</doi><oa>free_for_read</oa></addata></record>
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subjects Analysis
Animals
Arthritis
Biology and Life Sciences
Cartilage
Cartilage, Articular - cytology
Cartilage, Articular - metabolism
Cell culture
Cell Culture Techniques
Cell Differentiation
Cell Line
Chondrocytes - cytology
Chondrocytes - metabolism
Collagen
Collagen - biosynthesis
Deposition
Extracellular matrix
Extracellular Matrix - metabolism
Growth factors
Mathematical analysis
Mathematical models
Matrix methods
Measurement
Medicine and Health Sciences
Mice
Models, Statistical
Nutrients
Pellets
Physical Sciences
Polymers
Proteoglycans
Proteoglycans - biosynthesis
Stem cells
Studies
Tissue engineering
Tissue Engineering - methods
Transplants & implants
title Extracellular Matrix Deposition in Engineered Micromass Cartilage Pellet Cultures: Measurements and Modelling
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