کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
872042 910224 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of low frequency cyclic mechanical stretching on osteoclastogenesis
ترجمه فارسی عنوان
اثرات کشش مکانیکی سیکلی مکانیکی بر روی استئوکلستوژنز
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی پزشکی
چکیده انگلیسی

Bone cells are continuously exposed to mechanical deformations originating from movement. Mechanical stimulation at fundamental frequencies associated with most frequent normal locomotion (0.167–10 Hz) has been reported to suppress differentiation of osteoclasts. However, the effects of very low frequency (0.01 Hz) stimulation (which could be a frequency component of normal movement and also relevant to locomotion of movement-impaired individuals) on osteoclasts are poorly understood. We examined differentiation of osteoclasts from mouse bone marrow precursors and RAW 264.7 monocytes cultured on an extendable silicone surface that was dynamically stretched at 0.01 Hz. Three stimulation regimes were applied: (i) continuously during 4 days of differentiation, (ii) non-continuously, 8 h/day for 4 days, and (iii) post-differentiation, when stimulation was applied for 24 h after osteoclasts were noted. Low frequency mechanical stimulation did not inhibit osteoclastogenesis. Moreover, the expression of osteoclast marker genes was upregulated in mechanically stimulated cells compared to static control. Conditioned medium collected from osteoclast cultures stimulated non-continuously or post-differentiation induced differentiation of osteoclast precursors plated in standard tissue culture plates. Extracellular signal-regulated kinase (ERK) phosphorylation was increased in mechanically-stimulated cultures compared to static control. Thus, low frequency mechanical stimulation has qualitatively different effects on osteoclast formation compared to stimulation associated with the fundamental frequencies of normal movement.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Biomechanics - Volume 47, Issue 15, 28 November 2014, Pages 3750–3757
نویسندگان
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