Preadipocyte viability, proliferation, and apoptosis in young rats following dynamic mechanical force stimulation / 中国组织工程研究

ABSTRACT

BACKGROUND: The biological behaviors of preadipocytes in adipose tissue of young animals have been closely linked to the onset and prevention and treatment of obesity. Observing mechanical oscillation effects on biomechanical behaviors of preadipocytes using biomechanical stimuli would provide more direct experimental evidence for treatment of simple obesity using manipulation and massage therapy.OBJECTIVE: Different frequencies of mechanical force stimulation were performed on preadipocytes from young rats cultured in vitro to observe the changes in cell viability, proliferation, and apoptosis.METHODS: Preadipocytes from SD young rats were in vitro cultured. Following identification, preadipocytes were dynamically, mechanically stimulated through the use of constant temperature oscillator. According to different treatment frequencies, three groups were set: 0 Hz (blank control), 1.5 Hz, and 3 Hz. A 30-minute oscillation, once every 12 hours, total 3 days, was performed in each group. Following dynamic mechanical stimulation, cell viability, proliferation, and apoptosis in young rats were observed. RESULTS AND CONCLUSION: In the initial stage of culture,cells exhibited the morphology similar to fibroblasts. After oil red O staining, red particles appeared in the cells, indicating that the young mouse cells cultured in vitro were preadipocytes. With stimulation of oscillation force, the viability and proliferation of preadipocytes were significantly inhibited (P < 0.05 or P < 0.01). There wasno significant difference in effects of mechanical oscillation on preadipocyte apoptosis between 0 Hz and 1.5 Hz, 3 Hz groups (P > 0.05). These findings indicate that thecell biological mechanism underlying preventing simple obesity in adolescents is to inhibit the viability and proliferation of preadipocytes