Ovariectomy alters the structural and biomechanical properties of ovine femoro-tibial articular cartilage and increases cartilage iNOS
To examine the effect of oestrogen depletion produced by surgical ovariectomy on the structural and biomechanical properties of ovine femoro-tibial articular cartilage (AC), and the production of inducible nitric oxide synthase (iNOS) and nitrotyrosine by these tissues. Six aged ewes were surgically...
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| creator | Cake, M.A. Appleyard, R.C. Read, R.A. Smith, M.M. Murrell, G.A.C. Ghosh, P. |
| description | To examine the effect of oestrogen depletion produced by surgical ovariectomy on the structural and biomechanical properties of ovine femoro-tibial articular cartilage (AC), and the production of inducible nitric oxide synthase (iNOS) and nitrotyrosine by these tissues.
Six aged ewes were surgically ovariectomised (OVX), while six were used as unoperated controls. Dynamic biomechanical indentation testing of tibial plateau AC was performed at 26 weeks post-op. Histological sections of medial tibial plateau and lateral tibial plateau (LTP), medial and lateral femoral condyles (MFC, LFC) and patellar AC were examined for histopathology, toluidine blue staining intensity, and patterns of collagen birefringence intensity. Immunoreactivity for iNOS and nitrotyrosine was assessed in full-thickness biopsy plugs of LFC and patellar AC, and patellar AC explants were cultured to determine
in vitro NO release.
Phase lag was reduced overall in LTP-AC of OVX sheep (10.9
±
2.2° vs 12.1
±
2.3°;
P
<
0.0001). Cartilage thickness was reduced in the LTP of OVX sheep (
P
=
0.0002), in association with localised changes in dynamic shear modulus. Toluidine blue staining intensity was reduced in the patella, LFC, and MFC. Histological examination revealed greater histopathology scores in the MFC of OVX animals, and altered collagen birefringence intensity plots in the LTP. Immunostaining for iNOS was increased in patella AC (
P
=
0.008), whilst nitrotyrosine immunoreactivity was increased in patella (
P
=
0.03) and LFC (
P
<
0.0001) AC. NO release by patellar AC explants was also elevated.
Oestrogen depletion induced by OVX caused regional thinning of femoro-tibial cartilage, with biomechanical and histological changes suggestive of a disturbance in the content and/or structural organisation of the proteoglycan and collagen macromolecular assembly. The observed up-regulation of cartilage iNOS suggests a possible mechanism for these matrix changes. |
| doi_str_mv | 10.1016/j.joca.2005.07.001 |
| format | Article |
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Six aged ewes were surgically ovariectomised (OVX), while six were used as unoperated controls. Dynamic biomechanical indentation testing of tibial plateau AC was performed at 26 weeks post-op. Histological sections of medial tibial plateau and lateral tibial plateau (LTP), medial and lateral femoral condyles (MFC, LFC) and patellar AC were examined for histopathology, toluidine blue staining intensity, and patterns of collagen birefringence intensity. Immunoreactivity for iNOS and nitrotyrosine was assessed in full-thickness biopsy plugs of LFC and patellar AC, and patellar AC explants were cultured to determine
in vitro NO release.
Phase lag was reduced overall in LTP-AC of OVX sheep (10.9
±
2.2° vs 12.1
±
2.3°;
P
<
0.0001). Cartilage thickness was reduced in the LTP of OVX sheep (
P
=
0.0002), in association with localised changes in dynamic shear modulus. Toluidine blue staining intensity was reduced in the patella, LFC, and MFC. Histological examination revealed greater histopathology scores in the MFC of OVX animals, and altered collagen birefringence intensity plots in the LTP. Immunostaining for iNOS was increased in patella AC (
P
=
0.008), whilst nitrotyrosine immunoreactivity was increased in patella (
P
=
0.03) and LFC (
P
<
0.0001) AC. NO release by patellar AC explants was also elevated.
Oestrogen depletion induced by OVX caused regional thinning of femoro-tibial cartilage, with biomechanical and histological changes suggestive of a disturbance in the content and/or structural organisation of the proteoglycan and collagen macromolecular assembly. The observed up-regulation of cartilage iNOS suggests a possible mechanism for these matrix changes.</description><identifier>ISSN: 1063-4584</identifier><identifier>EISSN: 1522-9653</identifier><identifier>DOI: 10.1016/j.joca.2005.07.001</identifier><identifier>PMID: 16154775</identifier><language>eng</language><publisher>England: Elsevier Ltd</publisher><subject>Animals ; Biomechanical Phenomena ; Cartilage biomechanics ; Cartilage, Articular - enzymology ; Cartilage, Articular - pathology ; Cartilage, Articular - physiopathology ; Estrogens - deficiency ; Female ; Hindlimb ; Immunohistochemistry - methods ; Models, Animal ; Nitric Oxide - analysis ; Nitric oxide radical ; Nitric Oxide Synthase Type II - analysis ; Nitric Oxide Synthase Type II - metabolism ; Ovariectomy ; Postmenopause ; Sheep ; Tissue Culture Techniques</subject><ispartof>Osteoarthritis and cartilage, 2005-12, Vol.13 (12), p.1066-1075</ispartof><rights>2005 OsteoArthritis Research Society International</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c3131-eed130b69295f0b464ca2f72435624e4b69b3b9e0862dc0b2c4caf0cc3c313843</citedby><cites>FETCH-LOGICAL-c3131-eed130b69295f0b464ca2f72435624e4b69b3b9e0862dc0b2c4caf0cc3c313843</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S1063458405001822$$EHTML$$P50$$Gelsevier$$Hfree_for_read</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/16154775$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Cake, M.A.</creatorcontrib><creatorcontrib>Appleyard, R.C.</creatorcontrib><creatorcontrib>Read, R.A.</creatorcontrib><creatorcontrib>Smith, M.M.</creatorcontrib><creatorcontrib>Murrell, G.A.C.</creatorcontrib><creatorcontrib>Ghosh, P.</creatorcontrib><title>Ovariectomy alters the structural and biomechanical properties of ovine femoro-tibial articular cartilage and increases cartilage iNOS</title><title>Osteoarthritis and cartilage</title><addtitle>Osteoarthritis Cartilage</addtitle><description>To examine the effect of oestrogen depletion produced by surgical ovariectomy on the structural and biomechanical properties of ovine femoro-tibial articular cartilage (AC), and the production of inducible nitric oxide synthase (iNOS) and nitrotyrosine by these tissues.
Six aged ewes were surgically ovariectomised (OVX), while six were used as unoperated controls. Dynamic biomechanical indentation testing of tibial plateau AC was performed at 26 weeks post-op. Histological sections of medial tibial plateau and lateral tibial plateau (LTP), medial and lateral femoral condyles (MFC, LFC) and patellar AC were examined for histopathology, toluidine blue staining intensity, and patterns of collagen birefringence intensity. Immunoreactivity for iNOS and nitrotyrosine was assessed in full-thickness biopsy plugs of LFC and patellar AC, and patellar AC explants were cultured to determine
in vitro NO release.
Phase lag was reduced overall in LTP-AC of OVX sheep (10.9
±
2.2° vs 12.1
±
2.3°;
P
<
0.0001). Cartilage thickness was reduced in the LTP of OVX sheep (
P
=
0.0002), in association with localised changes in dynamic shear modulus. Toluidine blue staining intensity was reduced in the patella, LFC, and MFC. Histological examination revealed greater histopathology scores in the MFC of OVX animals, and altered collagen birefringence intensity plots in the LTP. Immunostaining for iNOS was increased in patella AC (
P
=
0.008), whilst nitrotyrosine immunoreactivity was increased in patella (
P
=
0.03) and LFC (
P
<
0.0001) AC. NO release by patellar AC explants was also elevated.
Oestrogen depletion induced by OVX caused regional thinning of femoro-tibial cartilage, with biomechanical and histological changes suggestive of a disturbance in the content and/or structural organisation of the proteoglycan and collagen macromolecular assembly. The observed up-regulation of cartilage iNOS suggests a possible mechanism for these matrix changes.</description><subject>Animals</subject><subject>Biomechanical Phenomena</subject><subject>Cartilage biomechanics</subject><subject>Cartilage, Articular - enzymology</subject><subject>Cartilage, Articular - pathology</subject><subject>Cartilage, Articular - physiopathology</subject><subject>Estrogens - deficiency</subject><subject>Female</subject><subject>Hindlimb</subject><subject>Immunohistochemistry - methods</subject><subject>Models, Animal</subject><subject>Nitric Oxide - analysis</subject><subject>Nitric oxide radical</subject><subject>Nitric Oxide Synthase Type II - analysis</subject><subject>Nitric Oxide Synthase Type II - metabolism</subject><subject>Ovariectomy</subject><subject>Postmenopause</subject><subject>Sheep</subject><subject>Tissue Culture Techniques</subject><issn>1063-4584</issn><issn>1522-9653</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2005</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp9kU1r3DAQhkVJadK0f6CHoFNudkcflr2QSwjpB4Tuoe1ZyONxo8W2NpK9kD_Q3x25u5BbTzPMvO8L8wxjnwSUAoT5vCt3AV0pAaoS6hJAvGEXopKy2JhKneUejCp01ehz9j6lHQAoIeAdOxdGVLquqwv2d3tw0RPOYXzmbpgpJj4_Ek9zXHBeohu4mzre-jASPrrJY57sY9hTnD0lHnoeDn4i3tMYYihm3_rVk7e4DC5yXNvB_aF_OX7CSC5l4-vc_9j-_MDe9m5I9PFUL9nvL_e_7r4VD9uv3-9uHwpUQomCqBMKWrORm6qHVhuNTva11KoyUpPOm1a1G4LGyA6hlZgFPSCq1d9odcmuj7n5hKeF0mxHn5CGwU0UlmRN06icBFkoj0KMIaVIvd1HP7r4bAXYlb7d2ZW-XelbqG2mn01Xp_SlHal7tZxwZ8HNUUD5xoOnaBN6mpA6H_MPbBf8__JfAE-DmMY</recordid><startdate>200512</startdate><enddate>200512</enddate><creator>Cake, M.A.</creator><creator>Appleyard, R.C.</creator><creator>Read, R.A.</creator><creator>Smith, M.M.</creator><creator>Murrell, G.A.C.</creator><creator>Ghosh, P.</creator><general>Elsevier Ltd</general><scope>6I.</scope><scope>AAFTH</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>200512</creationdate><title>Ovariectomy alters the structural and biomechanical properties of ovine femoro-tibial articular cartilage and increases cartilage iNOS</title><author>Cake, M.A. ; Appleyard, R.C. ; Read, R.A. ; Smith, M.M. ; Murrell, G.A.C. ; Ghosh, P.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3131-eed130b69295f0b464ca2f72435624e4b69b3b9e0862dc0b2c4caf0cc3c313843</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2005</creationdate><topic>Animals</topic><topic>Biomechanical Phenomena</topic><topic>Cartilage biomechanics</topic><topic>Cartilage, Articular - enzymology</topic><topic>Cartilage, Articular - pathology</topic><topic>Cartilage, Articular - physiopathology</topic><topic>Estrogens - deficiency</topic><topic>Female</topic><topic>Hindlimb</topic><topic>Immunohistochemistry - methods</topic><topic>Models, Animal</topic><topic>Nitric Oxide - analysis</topic><topic>Nitric oxide radical</topic><topic>Nitric Oxide Synthase Type II - analysis</topic><topic>Nitric Oxide Synthase Type II - metabolism</topic><topic>Ovariectomy</topic><topic>Postmenopause</topic><topic>Sheep</topic><topic>Tissue Culture Techniques</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Cake, M.A.</creatorcontrib><creatorcontrib>Appleyard, R.C.</creatorcontrib><creatorcontrib>Read, R.A.</creatorcontrib><creatorcontrib>Smith, M.M.</creatorcontrib><creatorcontrib>Murrell, G.A.C.</creatorcontrib><creatorcontrib>Ghosh, P.</creatorcontrib><collection>ScienceDirect Open Access Titles</collection><collection>Elsevier:ScienceDirect:Open Access</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Osteoarthritis and cartilage</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Cake, M.A.</au><au>Appleyard, R.C.</au><au>Read, R.A.</au><au>Smith, M.M.</au><au>Murrell, G.A.C.</au><au>Ghosh, P.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Ovariectomy alters the structural and biomechanical properties of ovine femoro-tibial articular cartilage and increases cartilage iNOS</atitle><jtitle>Osteoarthritis and cartilage</jtitle><addtitle>Osteoarthritis Cartilage</addtitle><date>2005-12</date><risdate>2005</risdate><volume>13</volume><issue>12</issue><spage>1066</spage><epage>1075</epage><pages>1066-1075</pages><issn>1063-4584</issn><eissn>1522-9653</eissn><abstract>To examine the effect of oestrogen depletion produced by surgical ovariectomy on the structural and biomechanical properties of ovine femoro-tibial articular cartilage (AC), and the production of inducible nitric oxide synthase (iNOS) and nitrotyrosine by these tissues.
Six aged ewes were surgically ovariectomised (OVX), while six were used as unoperated controls. Dynamic biomechanical indentation testing of tibial plateau AC was performed at 26 weeks post-op. Histological sections of medial tibial plateau and lateral tibial plateau (LTP), medial and lateral femoral condyles (MFC, LFC) and patellar AC were examined for histopathology, toluidine blue staining intensity, and patterns of collagen birefringence intensity. Immunoreactivity for iNOS and nitrotyrosine was assessed in full-thickness biopsy plugs of LFC and patellar AC, and patellar AC explants were cultured to determine
in vitro NO release.
Phase lag was reduced overall in LTP-AC of OVX sheep (10.9
±
2.2° vs 12.1
±
2.3°;
P
<
0.0001). Cartilage thickness was reduced in the LTP of OVX sheep (
P
=
0.0002), in association with localised changes in dynamic shear modulus. Toluidine blue staining intensity was reduced in the patella, LFC, and MFC. Histological examination revealed greater histopathology scores in the MFC of OVX animals, and altered collagen birefringence intensity plots in the LTP. Immunostaining for iNOS was increased in patella AC (
P
=
0.008), whilst nitrotyrosine immunoreactivity was increased in patella (
P
=
0.03) and LFC (
P
<
0.0001) AC. NO release by patellar AC explants was also elevated.
Oestrogen depletion induced by OVX caused regional thinning of femoro-tibial cartilage, with biomechanical and histological changes suggestive of a disturbance in the content and/or structural organisation of the proteoglycan and collagen macromolecular assembly. The observed up-regulation of cartilage iNOS suggests a possible mechanism for these matrix changes.</abstract><cop>England</cop><pub>Elsevier Ltd</pub><pmid>16154775</pmid><doi>10.1016/j.joca.2005.07.001</doi><tpages>10</tpages><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 1063-4584 |
| ispartof | Osteoarthritis and cartilage, 2005-12, Vol.13 (12), p.1066-1075 |
| issn | 1063-4584 1522-9653 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_68836240 |
| source | MEDLINE; Elsevier ScienceDirect Journals; EZB-FREE-00999 freely available EZB journals |
| subjects | Animals Biomechanical Phenomena Cartilage biomechanics Cartilage, Articular - enzymology Cartilage, Articular - pathology Cartilage, Articular - physiopathology Estrogens - deficiency Female Hindlimb Immunohistochemistry - methods Models, Animal Nitric Oxide - analysis Nitric oxide radical Nitric Oxide Synthase Type II - analysis Nitric Oxide Synthase Type II - metabolism Ovariectomy Postmenopause Sheep Tissue Culture Techniques |
| title | Ovariectomy alters the structural and biomechanical properties of ovine femoro-tibial articular cartilage and increases cartilage iNOS |
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