The contribution of sGAGs to stress-controlled tensile response of posterior porcine sclera

Despite the significant progress in characterizing mechanical functions of individual scleral extracellular matrix (ECM) components, the biomechanical contribution of sulfated glycosaminoglycans (sGAGs) is still poorly understood. The primary purpose of this study was to determine the possible funct...

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Veröffentlicht in:PloS one 2020-02, Vol.15 (2), p.e0227856-e0227856
Hauptverfasser: Hatami-Marbini, Hamed, Pachenari, Mohammad
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description Despite the significant progress in characterizing mechanical functions of individual scleral extracellular matrix (ECM) components, the biomechanical contribution of sulfated glycosaminoglycans (sGAGs) is still poorly understood. The primary purpose of this study was to determine the possible function of sGAGs in scleral mechanical response by characterizing the tensile behavior of normal and sGAG-depleted samples. We used chondroitinase ABC solution to remove sGAGs from scleral samples that were dissected from posterior porcine eyes. We performed biochemical analyses for assessing the efficacy of sGAG removal protocol. Furthermore, we conducted stress-controlled uniaxial tensile tests to characterize the influence of sGAG removal on mechanical properties of sclera. The tensile behavior of scleral strips right after dissection and after being soaked in buffer was also determined. Biochemical analyses confirmed that 18 hour incubation in 0.125 U/ml Chondroitinase ABC solution removed over 90% of chondroitin and dermatan sGAGs. No significant difference was observed in the thickness/hydration of samples because of enzyme- and buffer-treated samples. Furthermore, it was found that sGAG depletion did not significantly alter the tangent modulus, energy dissipation, and peak strain of posterior scleral strips. It was concluded that sGAGs did not influence the stress-controlled viscoelastic tensile response of sclera.
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The primary purpose of this study was to determine the possible function of sGAGs in scleral mechanical response by characterizing the tensile behavior of normal and sGAG-depleted samples. We used chondroitinase ABC solution to remove sGAGs from scleral samples that were dissected from posterior porcine eyes. We performed biochemical analyses for assessing the efficacy of sGAG removal protocol. Furthermore, we conducted stress-controlled uniaxial tensile tests to characterize the influence of sGAG removal on mechanical properties of sclera. The tensile behavior of scleral strips right after dissection and after being soaked in buffer was also determined. Biochemical analyses confirmed that 18 hour incubation in 0.125 U/ml Chondroitinase ABC solution removed over 90% of chondroitin and dermatan sGAGs. No significant difference was observed in the thickness/hydration of samples because of enzyme- and buffer-treated samples. 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Pachenari, Mohammad</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c692t-bfa11dc1587b7f56866288e7fed7b5864246f641463723d6c0d72572513d9b723</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Analysis</topic><topic>Animals</topic><topic>Biochemistry</topic><topic>Biology and Life Sciences</topic><topic>Biomechanics</topic><topic>Buffers</topic><topic>Chondroitin</topic><topic>Chondroitin ABC lyase</topic><topic>Chondroitin sulfate</topic><topic>Depletion</topic><topic>Dissection</topic><topic>Elasticity</topic><topic>Energy dissipation</topic><topic>Enzymes</topic><topic>Extracellular matrix</topic><topic>Fibrillar Collagens - metabolism</topic><topic>Glycosaminoglycans</topic><topic>Glycosaminoglycans - metabolism</topic><topic>Hydration</topic><topic>Industrial engineering</topic><topic>Mechanical analysis</topic><topic>Mechanical properties</topic><topic>Medicine and Health Sciences</topic><topic>Mucopolysaccharides</topic><topic>Organ Size</topic><topic>Physical Sciences</topic><topic>Sclera - physiopathology</topic><topic>Social Sciences</topic><topic>Stress, Mechanical</topic><topic>Sulfates</topic><topic>Sulfates - metabolism</topic><topic>Surgery</topic><topic>Swine</topic><topic>Tangent modulus</topic><topic>Tensile Strength</topic><topic>Tensile tests</topic><topic>Viscoelasticity</topic><topic>Viscosity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Hatami-Marbini, Hamed</creatorcontrib><creatorcontrib>Pachenari, Mohammad</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Gale In Context: Opposing Viewpoints</collection><collection>Gale In Context: Science</collection><collection>ProQuest Central (Corporate)</collection><collection>Animal Behavior Abstracts</collection><collection>Bacteriology Abstracts (Microbiology B)</collection><collection>Biotechnology Research Abstracts</collection><collection>Nursing &amp; 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The primary purpose of this study was to determine the possible function of sGAGs in scleral mechanical response by characterizing the tensile behavior of normal and sGAG-depleted samples. We used chondroitinase ABC solution to remove sGAGs from scleral samples that were dissected from posterior porcine eyes. We performed biochemical analyses for assessing the efficacy of sGAG removal protocol. Furthermore, we conducted stress-controlled uniaxial tensile tests to characterize the influence of sGAG removal on mechanical properties of sclera. The tensile behavior of scleral strips right after dissection and after being soaked in buffer was also determined. Biochemical analyses confirmed that 18 hour incubation in 0.125 U/ml Chondroitinase ABC solution removed over 90% of chondroitin and dermatan sGAGs. No significant difference was observed in the thickness/hydration of samples because of enzyme- and buffer-treated samples. Furthermore, it was found that sGAG depletion did not significantly alter the tangent modulus, energy dissipation, and peak strain of posterior scleral strips. It was concluded that sGAGs did not influence the stress-controlled viscoelastic tensile response of sclera.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>32084141</pmid><doi>10.1371/journal.pone.0227856</doi><tpages>e0227856</tpages><orcidid>https://orcid.org/0000-0002-6693-2121</orcidid><oa>free_for_read</oa></addata></record>
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subjects Analysis
Animals
Biochemistry
Biology and Life Sciences
Biomechanics
Buffers
Chondroitin
Chondroitin ABC lyase
Chondroitin sulfate
Depletion
Dissection
Elasticity
Energy dissipation
Enzymes
Extracellular matrix
Fibrillar Collagens - metabolism
Glycosaminoglycans
Glycosaminoglycans - metabolism
Hydration
Industrial engineering
Mechanical analysis
Mechanical properties
Medicine and Health Sciences
Mucopolysaccharides
Organ Size
Physical Sciences
Sclera - physiopathology
Social Sciences
Stress, Mechanical
Sulfates
Sulfates - metabolism
Surgery
Swine
Tangent modulus
Tensile Strength
Tensile tests
Viscoelasticity
Viscosity
title The contribution of sGAGs to stress-controlled tensile response of posterior porcine sclera
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