OBJECTIVE: To investigate the longitudinal angiogenic activity of subchondral bone and cartilage during the progression of osteoarthritis (OA) using a rabbit model of OA. MATERIALS AND METHODS: OA was surgically induced by anterior cruciate ligament transaction (ACLT) in left knee of 12 months old female New Zealand white rabbits (n = 33). Histological examination, immunohistochemistry, and angiogenic activity assay was done at 0, 2, 4, 6, 8, 12 weeks after ACLT. Histologic evaluation was performed with haematoxylin and eosin, safranin-O staining to assess the OA change of medial femoral condyle (MFC) and lateral femoral condyle (LFC). CD31 immunohistochemistry was performed to confirm the vascular invasion at osteochondral junction. A co-cultured tubule formation assay was conducted to evaluate angiogenic activity of the subchondral bone and cartilage of MFC and LFC as well as synovium. Association between histological changes, angiogenic activity, and vascular invasion were evaluated. RESULTS: OA changes increased in a time-dependent manner both in MFC and LFC. Angiogenic activity of subchondral bone showed a monomodal change during the OA progression, achieved a peak in the early to progressive stage and decreased to normal level in the late stage of OA. Surge of vascular invasion was observed following the increase of angiogenic activity in the progressive stage of OA. Angiogenic activity of cartilage did not change during the course of OA progression. CONCLUSION: Angiogenic activity of subchondral bone was elevated in the early to progressive stage of OA and vascular invasion into the osteochondral junction followed.
OBJECTIVE: To investigate the longitudinal angiogenic activity of subchondral bone and cartilage during the progression of osteoarthritis (OA) using a rabbit model of OA. MATERIALS AND METHODS: OA was surgically induced by anterior cruciate ligament transaction (ACLT) in left knee of 12 months old female New Zealand white rabbits (n = 33). Histological examination, immunohistochemistry, and angiogenic activity assay was done at 0, 2, 4, 6, 8, 12 weeks after ACLT. Histologic evaluation was performed with haematoxylin and eosin, safranin-O staining to assess the OA change of medial femoral condyle (MFC) and lateral femoral condyle (LFC). CD31 immunohistochemistry was performed to confirm the vascular invasion at osteochondral junction. A co-cultured tubule formation assay was conducted to evaluate angiogenic activity of the subchondral bone and cartilage of MFC and LFC as well as synovium. Association between histological changes, angiogenic activity, and vascular invasion were evaluated. RESULTS: OA changes increased in a time-dependent manner both in MFC and LFC. Angiogenic activity of subchondral bone showed a monomodal change during the OA progression, achieved a peak in the early to progressive stage and decreased to normal level in the late stage of OA. Surge of vascular invasion was observed following the increase of angiogenic activity in the progressive stage of OA. Angiogenic activity of cartilage did not change during the course of OA progression. CONCLUSION: Angiogenic activity of subchondral bone was elevated in the early to progressive stage of OA and vascular invasion into the osteochondral junction followed.
Authors: A J Grodzinsky; R M Porter; A G Bajpayee; R E De la Vega; M Scheu; N H Varady; I A Yannatos; L A Brown; Y Krishnan; T J Fitzsimons; P Bhattacharya; E H Frank Journal: Eur Cell Mater Date: 2017-12-05 Impact factor: 3.942
Authors: Kristine M Fischenich; Keith D Button; Garrett A Coatney; Ryan S Fajardo; Kevin M Leikert; Roger C Haut; Tammy L Haut Donahue Journal: J Biomech Date: 2014-12-02 Impact factor: 2.712
Authors: Jiangdong Ren; Jinsai Ma; Xiaogang Zhang; Abdusami Aimaiti; Maimaitiming Saiyiti; Yuming Chen; Li Cao Journal: J Int Med Res Date: 2017-11-10 Impact factor: 1.671
Authors: Yi He; Anne Sofie Siebuhr; Niels Ulrik Brandt-Hansen; Jianxia Wang; Di Su; Qinlong Zheng; Ole Simonsen; Kristian Kjær Petersen; Lars Arendt-Nielsen; Thomas Eskehave; Hans Christian Hoeck; Morten Asser Karsdal; Anne C Bay-Jensen Journal: BMC Musculoskelet Disord Date: 2014-09-22 Impact factor: 2.362