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| 1 | Establishing proof of concept:Platelet-rich plasma and bone marrow aspirate concentrate may improve cartilage repair following surgical treatment for osteochondral lesions of the talus显示文摘Osteochondral lesions of the talus are common injuries in the athletic patient. They present a challenging clinical problem as cartilage has a poor potential for healing. Current surgical treatments consist of reparative(microfracture) or replacement(autologous osteochondral graft) strategies and demonstrate good clinical outcomes at the short and medium term follow-up. Radiological findings and second-look arthroscopy however, indicate possible poor cartilage repair with evidence of fibrous infill and fissuring of the regenerative tissue following microfracture. Longer-term follow-up echoes these findings as it demonstrates a decline in clinical outcome. The nature of the cartilage repair that occurs for an osteochondral graft to become integrated with the native surround tissue is also of concern. Studies have shown evidence of poor cartilage integration,with chondrocyte death at the periphery of the graft, possibly causing cyst formation due to synovial fluid ingress. Biological adjuncts, in the form of platelet-rich plasma(PRP) and bone marrow aspirate concentrate(BMAC), have been investigated with regard to their potential in improving cartilage repair in both in vitro and in vitro settings. The in vitro literature indicates that these biological adjuncts may increase chondrocyte proliferation as well as synthetic capability, while limiting the catabolic effects of an inflammatory joint environment. These findings have been extrapolated to in vitro animal models, with results showing that both PRP and BMAC improve cartilage repair. The basic science literature therefore establishes the proof of concept that biological adjuncts may improve cartilage repair when used in conjunction with reparative and replacement treatment strategies for osteochondral lesions of the talus. | Niall A Smyth Christopher D Murawski Amgad M Haleem Charles P Hannon Ian Savage-Elliott John G Kennedy | 2012 | World Journal of Orthopedics2012，3，7： | 8 |
| 2 | Platelet-rich plasma increases transforming growth factor-beta1 expression at graft-host interface following autologous osteochondral transplantation in a rabbit model显示文摘AIM: To explore the effect of platelet-rich plasma on protein expression patterns of transforming growth factor-beta1(TGF-β1) in cartilage following autologous osteochondral transplantation(AOT) in a rabbit knee cartilage defect model.METHODS: Twelve New Zealand white rabbits received bilateral AOT. In each rabbit, one knee was randomized to receive an autologous platelet rich plasma(PRP) injection and the contralateral knee received saline injection. Rabbits were euthanized at 3, 6 and 12 wk post-operatively. Articular cartilage sections were stained with TGF-β1 antibody. Histological regions of interest(ROI)(left, right and center of the autologous grafts interfaces) were evaluated using Meta Morph. Percentage of chondrocytes positive for TGF-β1 was then assessed.RESULTS: Percentage of chondrocytes positive for TGF-β1 was higher in PRP treated knees for selected ROIs(left; P = 0.03, center; P = 0.05) compared to control and was also higher in the PRP group at each post-operative time point(P = 6.6 × 10^(-4), 3.1 × 10^(-4) and 7.3 × 10^(-3) for 3, 6 and 12 wk, respectively). TGF-β1 expression was higher in chondrocytes of PRP-treated knees(36% ± 29% vs 15% ± 18%)(P = 1.8 × 10^(-6)) overall for each post-operative time point and ROI. CONCLUSION: Articular cartilage of rabbits treated with AOT and PRP exhibit increased TGF-β1 expression compared to those treated with AOT and saline. Our findings suggest that adjunctive PRP may increase TGF-β1 expression, which may play a role in the chondrogenic effect of PRP in vivo. | Lorraine A Boakye Keir A Ross John M Pinski Niall A Smyth Amgad M Haleem Charles P Hannon Lisa A Fortier John G Kennedy | 2015 | World Journal of Orthopedics2015，6，11： | 7 |
| 3 | Design and synthesis of celecoxib and rofecoxib analogues as selective cyclooxygenase-2 ( COX-2 ) inhibitors: replaceent of sulfonamide and methylsulfonyl pharmacophores by an azido bloisostere 显示文摘 | Amgad G Habeeb PN Praveen R | 2001 | J Med Chem2001，44，18： | 1 |
| 4 | Design and synthesis of 4, 5-diphenyl-4-isoxazolines: novel inhibitors of cyclooxygenase-2 activity 显示文摘 | Amgad G Habeeb PN Praveen R | 2001 | J Med Chem2001，44，18： | 1 |
| 5 | Fullscale testing for composite slab/beam systems made with extended stud spacing显示文摘 | Sameh S B Amgad F M G Maher K T | | 0，，05： | 1 |
| 6 | Design,syntheses and evaluation of 2,3-diphenylcycloprop-2-en-1-ones and oxime derivatives as potential cyclooxygenase-2 (COX-2) inhibitors with analgesic-antiinflammatory activity显示文摘 | Li H Rao P N P Amgad G H | 2002 | Drug Dev Res2002，57，1： | 1 |
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