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Pit-and trench-forming osteoclasts:a distinction that matters

Bone Research 2015年第4期3卷 199-209页

作者： ditte mh merrild Dinisha C Pirapaharan Christina M Andreasen Per Kjxrsgaard-Andersen Anas MJ Mùller Ming Ding Jean-Marie Delaissé Kent Sùe Department of Clinical Cell Biology Vejle Hospital/Lillebaelt HospitalInstitute of Regional Health ResearchUniversity of Southern Denmark Orthopaedic Research Laboratory Department of Orthopedic Surgery and TraumatologyOdense University HospitalUniversity of Southern Denmark Department of Orthopedic Surgery Vejle Hospital/Lillebaelt Hospital

Osteoclasts（OCs）seeded on bone slices either drill round pits or dig long *** pits correspond to intermittent resorption,trenches correspond to continuous and faster resorption and require a distinct assembly of the resorption *** is unknown whether the distinction between pits and trenches has any biological *** OCs prepared from different blood donors,we found that female OCs achieved increased resorption mainly through pit formation,whereas male OCs did so through trench *** formation went along with high collagenolytic activity and high cathepsin K（CatK）expression,thereby allowing deeper demineralization.A specific CatK inhibitor abrogated the generation of trenches,while still allowing the generation of *** obtained from bone marrow were more prone to generate trenches than those obtained from *** electron microscopy of bone surfaces eroded in vivo showed trenches and pits of similar size as those made by OCs in *** conclude that the distinction between trench-and pit-forming OCs is relevant to the differences among OCs from different skeletal sites,different individuals,including gender,and results from differences in colIagenolytic *** indicates a biological relevance and highlights the importance of discriminating between pits and trenches when assessing resorption.

关键词： trench cathepsin collagen faster prone assembly highlights thereby correspond apparatus

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