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Increased mast cell degranulation and co-localization of mast cells with the NMDA receptor-1 during healing after Achilles tendon rupture
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Biochemistry and Microbiology. Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Public Health and Caring Sciences, Family Medicine and Preventive Medicine. Department of Molecular Medicine and Surgery, Karolinska Institutet.
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2017 (English)In: Cell and Tissue Research, ISSN 0302-766X, E-ISSN 1432-0878, Vol. 370, no 3, p. 451-460Article in journal (Refereed) Published
Abstract [en]

The role of inflammation and the mechanism of tendon healing after rupture has historically been a matter of controversy. The purpose of the present study is to investigate the role of mast cells and their relation to the NMDA receptor-1 (a glutamate receptor) during healing after Achilles tendon rupture. Eight female Sprague Dawley rats had their right Achilles tendon transected. Three weeks after rupture, histological quantification of mast cell numbers and their state of degranulation was assessed by histochemistry. Co-localization of mast cell tryptase (a mast cell marker) and NMDA receptor-1 was determined by immunofluorescence. The intact left Achilles tendon was used as control. An increased number of mast cells and a higher proportion of degranulated mast cells were found in the healing Achilles tendon compared to the intact. In addition, increased co-localization of mast cell tryptase and NMDA receptor-1 was seen in the areas of myotendinous junction, mid-tendon proper and bone tendon junction of the healing versus the intact tendon. These findings introduce a possible role for mast cells in the healing phase after Achilles tendon rupture.

Place, publisher, year, edition, pages
Berlin Heidelberg, 2017. Vol. 370, no 3, p. 451-460
Keywords [en]
Achilles tendon healing, Mast cells, NMDA, Rats, Tryptase
National Category
Cell and Molecular Biology Medical and Health Sciences
Research subject
Orthopaedics; Immunology
Identifiers
URN: urn:nbn:se:uu:diva-395522DOI: 10.1007/s00441-017-2684-yOAI: oai:DiVA.org:uu-395522DiVA, id: diva2:1362476
Available from: 2019-10-20 Created: 2019-10-20 Last updated: 2019-10-23
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Alim, Md AbdulKristiansson, PerPejler, GunnarPeterson, Magnus

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