Effect of Changtong oral liquid on fibroblast proliferation in normal and adhesive rat peritoneal tissues / 南方医科大学学报

<p><b>OBJECTIVE</b>To investigate the effect of Changtong oral liquid (CTOL) on the proliferation of cultured fibroblasts derived from normal peritoneum (NFs) and adhesive peritoneum (AFs) of rats.</p><p><b>METHODS</b>Twenty male SD rats were randomized into 4 groups, including a normal serum group and 3 CTOL groups with CTOL treatment at low, medium or high doses. Serum samples were obtained from the abdominal arteries of the rats after oral treatment with CTOL for 7 days. The fibroblasts were isolated from the peritoneum by means of tissue culture, and the passage 3-8 cells were cultured with the sera of the normal control and CTOL groups for 24, 48, 72 and 96 h. MTT assay was used to observe the proliferation of the fibroblasts.</p><p><b>RESULTS</b>The dose of CTOL was inversely correlated to the absorbance but positively to the growth inhibition rates. Compared with the NFs cultured in normal control rat serum, the NFs in serum from CTOL groups showed no obviously changes in the absorbance at 24 and 48 h, but displayed significant reduction at 72 and 96 h (P<0.01). Compared with the AFs in normal rat serum, the AFs in the 3 CTOL groups all showed significantly decreased absorbance at 24, 48, 72 and 96 h (P<0.05). At the same time point, the inhibition rate of AFs in low-dose CTOL group showed no significant difference from that in the normal control group, but CTOL at a medium dose resulted in a significantly higher inhibition rate of AFs at 72 h (P<0.05). High-dose CTOL produced significant differences in the inhibition rates of AFs and NFs (P<0.05).</p><p><b>CONCLUSION</b>CTOL can inhibit the proliferation of AFs and NFs in vitro. AFs appear to be more sensitive to CTOL, which has a dose-dependent inhibitory effect of AF proliferation.</p>

Preparation of gemcitabine polybutylcyanoacrylate nanoparticles / 南方医科大学学报

<p><b>OBJECTIVE</b>To optimize the preparation process of gemcitabine polybutylcyanoacrylate nanoparticles (GCTB- PBCA-NP).</p><p><b>METHODS</b>According to the particle size, the entrapment efficiency and the loading quantity of GCTB-PBCA-NP, single factor analysis was carried out to optimize the component composition and preparation process based on an orthogonal design.</p><p><b>RESULTS</b>The mean particle size of the NP was (112-/+9) nm with an entrapment efficiency of (54.12-/+2.43)% and drug loading of (11.08-/+0.89)%.</p><p><b>CONCLUSION</b>An optimized nanoparticular drug delivery system is obtained by emulsion polymerization.</p>