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Alzahrani MM, Makhdom AM, Rauch F, Lauzier D, Kotsiopriftis M, Ghadakzadeh S, Hamdy RC. Assessment of the effect of systemic delivery of sclerostin antibodies on Wnt signaling in distraction osteogenesis. J Bone Miner Metab 2018. [PMID: 28647818 DOI: 10.1007/s00774-017-0847-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Sclerostin is a known inhibitor of the Wnt signaling pathway which is involved in osteogenesis and, when inactivated, stimulates bone formation. To our knowledge, this effect has not been studied in the context of distraction osteogenesis (DO). Tibial DO was conducted on a total of 24 wild-type mice, which were then divided into 2 groups-a saline injection group (control) and an anti-sclerostin (Scl-Ab) injection group (treatment). The mice in the treatment group received 100 mg/kg intravenous injections of the antibody weekly until killing. The 12 mice in each group were subdivided into four time points according to post-osteotomy time of killing-11 days (mid-distraction), 17 days (late distraction), 34 days (mid-consolidation) and 51 days (late consolidation), with 3 mice per subgroup. After killing, the tibia specimens were collected for immunohistochemical analysis. Our results show that the group injected with anti-sclerostin had an earlier peak (day 11) in the distraction phase of the osteogenic molecules involved in the Wnt signaling pathway in comparison to the placebo group. In addition, downregulation of the inhibitors of this pathway was noted in the treatment group when compared with the placebo group. Furthermore, LRP-5 showed a significant increase in expression in the treatment group. Sclerostin inhibition has a significant effect on the DO process through its effect on the Wnt pathway. This effect was evident through the decreased effect of sclerostin on LRP-5 and earlier upregulation of the osteogenic molecules involved in this pathway.
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Affiliation(s)
- Mohammad M Alzahrani
- Division of Orthopaedic Surgery, Shriners Hospital for Children, Montreal Children Hospital, McGill University, 1003 Decarie Blvd, Montreal, QC, H4A 0A9, Canada.
- Department of Orthopaedic Surgery, University of Dammam, Dammam, Saudi Arabia.
| | - Asim M Makhdom
- Division of Orthopaedic Surgery, Shriners Hospital for Children, Montreal Children Hospital, McGill University, 1003 Decarie Blvd, Montreal, QC, H4A 0A9, Canada
- Department of Orthopaedic Surgery, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Frank Rauch
- Division of Orthopaedic Surgery, Shriners Hospital for Children, Montreal Children Hospital, McGill University, 1003 Decarie Blvd, Montreal, QC, H4A 0A9, Canada
| | - Dominique Lauzier
- Division of Orthopaedic Surgery, Shriners Hospital for Children, Montreal Children Hospital, McGill University, 1003 Decarie Blvd, Montreal, QC, H4A 0A9, Canada
| | - Maria Kotsiopriftis
- Division of Orthopaedic Surgery, Shriners Hospital for Children, Montreal Children Hospital, McGill University, 1003 Decarie Blvd, Montreal, QC, H4A 0A9, Canada
| | - Saber Ghadakzadeh
- Division of Orthopaedic Surgery, Shriners Hospital for Children, Montreal Children Hospital, McGill University, 1003 Decarie Blvd, Montreal, QC, H4A 0A9, Canada
| | - Reggie C Hamdy
- Division of Orthopaedic Surgery, Shriners Hospital for Children, Montreal Children Hospital, McGill University, 1003 Decarie Blvd, Montreal, QC, H4A 0A9, Canada
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Han KJ, Cho JH, Han SH, Hyun HS, Lee DH. Subacromial impingement syndrome secondary to scapulothoracic dyskinesia. Knee Surg Sports Traumatol Arthrosc 2012; 20:1958-60. [PMID: 22127513 DOI: 10.1007/s00167-011-1805-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2011] [Accepted: 11/18/2011] [Indexed: 01/15/2023]
Abstract
The authors describe two cases of subacromial impingement syndrome of the shoulder secondary to scapular dyskinesia caused by a tumor in young adults. The two tumors, an osteochondroma and a ganglion, were located in the scapulothoracic joint and inhibited normal kinesis of the scapula during arm motion.
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Affiliation(s)
- Kyeong-Jin Han
- Department of Orthopedic Surgery, Ajou University, School of Medicine, San 5, Woncheon-dong, Yeongtong-gu, Suwon, 443-721, Korea
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