ABSTRACT
Objective: To investigate the effect of Erzhiwan (EZW) on the invasion and metastasis of human colon cancer HCT116 cells. Method: The abilities of invasion (number of transmembrane cells) and migration (relative width of 48 h scratch) were observed by Transwell assay. Western blot was used to detect vascular endothelial growth factor (VEGF) and E-cadherin protein, respectively. Result: ① Transwell results showed that compared with the blank control group, the number of model piercing cells in each drug group was decreased (PPPPPPPP-1 L-OHP combined with 10% EZW group was lower than that in L-OHP group (PP-1 L-OHP combined with 10% EZW group and L-OHP group increased the expression of E-cadherin protein significantly. Compared with L-OHP group, the expression of E-cadherin protein was the highest (PConclusion: EZW can inhibit the invasion and metastasis of colon cancer HCT116 cells, and the best effect is achieved after combined with L-OHP. This may be related to the decrease of VEGF protein expression and the increase of E-cadherin protein expression after combination with L-OHP.
ABSTRACT
<p><b>OBJECTIVE</b>To study the effect of Xinjining extract (, XJN) on inward rectifier potassium current (I(K1)) in ventricular myocyte (VMC) of guinea pigs and its anti-arrhythmic mechanism on ion channel level.</p><p><b>METHODS</b>Single VMC was enzymatically isolated by zymolisis, and whole-cell patch clamp recording technique was used to record the I(k1) in VMC irrigated with XJN of different concentrations (1.25, 2.50, 5.00 g/L; six samples for each). The stable current and conductance of the inward component of I(K1) as well as the outward component of peak I(K1) and conductance of it accordingly was recorded when the test voltage was set on -110 mV.</p><p><b>RESULTS</b>The suppressive rate of XJN on the inward component of I(K1) was 9.54% + or - 5.81%, 34.82% + or - 15.03%, and 59.52% + or - 25.58% with a concentration of 1.25, 2.50, and 5.00 g/L, respectively, and that for the outward component of peak I(K1) was 23.94% + or - 7.45%, 52.98% + or - 19.62%, and 71.42% + or - 23.01%, respectively (all P<0.05). Moreover, different concentrations of XJN also showed effects for reducing I(K1) conductance.</p><p><b>CONCLUSION</b>XJN has inhibitory effect on I(K1) in guinea pig's VMC, and that of the same concentration shows stronger inhibition on outward component than on inward component, which may be one of the mechanisms of its anti-arrhythmic effect.</p>