Effects of fluid shear stress strength on mRNA expression of ATP6V1a1 in polarized osteoclasts / 华西口腔医学杂志

<p><b>OBJECTIVE</b>To observe effects of fluid shear stress strength on mRNA expression of ATP6V1a1 in rat polarized osteoclasts.</p><p><b>METHODS</b>Rat polarized osteoclasts suffered 0.0 (control group), 0.9, 2.9, 8.7 and 26.3 dynes/cm2 fluid shear stress for 30 min. mRNA expression of ATP6V1a1 was detected by Real-Time fluorescent quantitation PCR.</p><p><b>RESULTS</b>mRNA expression of ATP6V1a1 in 0.0 (control group), 0.9, 2.9, 8.7 and 26.3 dynes/cm2 groups was (1.14 +/- 0.06) x 10(6), (1.62 +/- 0.09) x 10(6), (2.28 +/- 0.13) x 10(6), (3.24 +/- 0.18) x 10(6), (9.16 +/- 0.53) x 10(6) copy numbers, respectively (P < 0.05).</p><p><b>CONCLUSION</b>In the present study, polarized osteoclasts are sensitive to fluid shear stress. mRNA expression of ATP6V1a1 has increscent tendency along with increasing of fluid shear stress strength.</p>

Characteristics of free Ca2+ distribution in cultured osteoclast-like cells / 华西口腔医学杂志

<p><b>OBJECTIVE</b>To study the spatial distribution of free Ca2+ in osteoclast-like cells cultured on glass.</p><p><b>METHODS</b>To detect the free Ca2+ in osteoclast-like cells, the images were analyzed with image software, using the laser scanning confocal microscope and fluorescent probe.</p><p><b>RESULTS</b>At 37 degrees C the free Ca2+ in osteoclast-like cells could be labelled effectively with 10 micromol/L Fluo-3/AM, the intensity of Ca2+ fluorescent signal in the central part was greater than that in the peripheral part and in the same section the signal was not distributed evenly.</p><p><b>CONCLUSION</b>The intensity of Ca2+ fluorescent signal is different among various organellae in osteoclast-like cell, which suggests the osteoclast-like cell modulate its own function through the spatial difference of free Ca2+ concentration.</p>