目的探讨不同剂量AngⅡ对裸鼠肝癌细胞皮下移植瘤VEGF、TGF-β1、MMP-9 m RNA表达的影响。方法建立裸鼠肝癌细胞皮下移植瘤模型32只,模型成功后随机分为Ang Ⅱ高、中、低剂量组(75、50、25μg·kg^(-1))以及对照组(生理盐水),每只...目的探讨不同剂量AngⅡ对裸鼠肝癌细胞皮下移植瘤VEGF、TGF-β1、MMP-9 m RNA表达的影响。方法建立裸鼠肝癌细胞皮下移植瘤模型32只,模型成功后随机分为Ang Ⅱ高、中、低剂量组(75、50、25μg·kg^(-1))以及对照组(生理盐水),每只裸鼠腹腔给药0.1 m L,隔日一次,连续给药21天。停药2天后,脱颈处死,检测瘤重和体积,Real-time PCR检测肿瘤组织中VEGF、TGF-β1、MMP-9的m RNA表达。结果 Ang Ⅱ高剂量组和中剂量组的瘤重和体积均显著大于对照组和低剂量组(P<0.01),Ang Ⅱ低剂量组与对照组以及高剂量组与中剂量组之间比较,差异均无统计学意义(P>0.05)。Ang Ⅱ高剂量组和中剂量组VEGF、TGF-β1、MMP-9 m RNA表达水平均高于对照组和低剂量组,差异有统计学意义(P<0.05)。高剂量组VEGF和MMP-9 m RNA表达水平显著高于中剂量组(P<0.05),但两组TGF-β1 m RNA表达水平无显著差异(P>0.05)。结论 AngⅡ可明显促进裸鼠肝癌细胞皮下移植瘤的生长和转移,可能是通过影响VEGF、TGF-β1、MMP-9的表达来发挥作用。展开更多
A 52 m/9 Gb/s four-level pulse amplitude modulation(PAM4) plastic optical fiber(POF)-underwater wireless laser transmission(UWLT) convergence with a laser beam reducer is proposed. A 52 m/9 Gb/s PAM4 POFUWLT con...A 52 m/9 Gb/s four-level pulse amplitude modulation(PAM4) plastic optical fiber(POF)-underwater wireless laser transmission(UWLT) convergence with a laser beam reducer is proposed. A 52 m/9 Gb/s PAM4 POFUWLT convergence is practically demonstrated with the application of a laser beam reducer to reduce the collimated beam diameter. A 50 m graded-index(GI)-POF is employed as an underwater extender to efficiently enhance the coverage of UWLT. The performances of PAM4 POF-UWLT convergence in view of bit error rate(BER) and eye diagrams improve with the decrease of the collimated beam diameter because of the small amount of light absorbed by clear ocean water. Competent BER and eye diagrams(three independent eye diagrams) are achieved over a 50 m GI-POF transmission with a 2 m clear ocean water link.展开更多
目的探讨固有免疫信号通路分子IRAK-M在TLR9信号诱导肝组织淋巴细胞浸润过程中的作用。方法应用野生型B6小鼠及IRAK-M基因敲除小鼠,腹腔注射TLR9配体CpG寡核苷酸激活肝内TLR9信号系统,提取小鼠肝内浸润淋巴细胞,并采用流式细胞术检测肝...目的探讨固有免疫信号通路分子IRAK-M在TLR9信号诱导肝组织淋巴细胞浸润过程中的作用。方法应用野生型B6小鼠及IRAK-M基因敲除小鼠,腹腔注射TLR9配体CpG寡核苷酸激活肝内TLR9信号系统,提取小鼠肝内浸润淋巴细胞,并采用流式细胞术检测肝内浸润不同淋巴细胞群的比率及细胞因子的表达情况。结果 CpG ODN激活TLR9信号通路后,IRAK-M基因敲除小鼠肝内浸润CD4+和CD8+T细胞比率较野生型B6小鼠显著增加[CD4+:(22.50±0.73)% vs. (20.03±0.75)%;CD8+:(17.83±0.67)%vs.(15.55±0.75)%;P均<0.05];肝内淋巴细胞细胞因子白细胞介素-6(IL-6)和肿瘤坏死因子(TNF-α)合成增加[IL-6:(1.91±0.26)% vs. (0.93±0.12)%;TNF-α:(13.23±1.23)% vs. (8.16±0.66)%;P均<0.01]。结论 IRAK-M具有负调节肝内TLR9信号系统的作用。展开更多
文摘目的探讨不同剂量AngⅡ对裸鼠肝癌细胞皮下移植瘤VEGF、TGF-β1、MMP-9 m RNA表达的影响。方法建立裸鼠肝癌细胞皮下移植瘤模型32只,模型成功后随机分为Ang Ⅱ高、中、低剂量组(75、50、25μg·kg^(-1))以及对照组(生理盐水),每只裸鼠腹腔给药0.1 m L,隔日一次,连续给药21天。停药2天后,脱颈处死,检测瘤重和体积,Real-time PCR检测肿瘤组织中VEGF、TGF-β1、MMP-9的m RNA表达。结果 Ang Ⅱ高剂量组和中剂量组的瘤重和体积均显著大于对照组和低剂量组(P<0.01),Ang Ⅱ低剂量组与对照组以及高剂量组与中剂量组之间比较,差异均无统计学意义(P>0.05)。Ang Ⅱ高剂量组和中剂量组VEGF、TGF-β1、MMP-9 m RNA表达水平均高于对照组和低剂量组,差异有统计学意义(P<0.05)。高剂量组VEGF和MMP-9 m RNA表达水平显著高于中剂量组(P<0.05),但两组TGF-β1 m RNA表达水平无显著差异(P>0.05)。结论 AngⅡ可明显促进裸鼠肝癌细胞皮下移植瘤的生长和转移,可能是通过影响VEGF、TGF-β1、MMP-9的表达来发挥作用。
基金the financial support from the Ministry of Science and Technology of Taiwan, China (Nos. MOST 104-2221-E-027-072-MY3 and MOST 106-2221-E-027-073)
文摘A 52 m/9 Gb/s four-level pulse amplitude modulation(PAM4) plastic optical fiber(POF)-underwater wireless laser transmission(UWLT) convergence with a laser beam reducer is proposed. A 52 m/9 Gb/s PAM4 POFUWLT convergence is practically demonstrated with the application of a laser beam reducer to reduce the collimated beam diameter. A 50 m graded-index(GI)-POF is employed as an underwater extender to efficiently enhance the coverage of UWLT. The performances of PAM4 POF-UWLT convergence in view of bit error rate(BER) and eye diagrams improve with the decrease of the collimated beam diameter because of the small amount of light absorbed by clear ocean water. Competent BER and eye diagrams(three independent eye diagrams) are achieved over a 50 m GI-POF transmission with a 2 m clear ocean water link.
文摘目的探讨固有免疫信号通路分子IRAK-M在TLR9信号诱导肝组织淋巴细胞浸润过程中的作用。方法应用野生型B6小鼠及IRAK-M基因敲除小鼠,腹腔注射TLR9配体CpG寡核苷酸激活肝内TLR9信号系统,提取小鼠肝内浸润淋巴细胞,并采用流式细胞术检测肝内浸润不同淋巴细胞群的比率及细胞因子的表达情况。结果 CpG ODN激活TLR9信号通路后,IRAK-M基因敲除小鼠肝内浸润CD4+和CD8+T细胞比率较野生型B6小鼠显著增加[CD4+:(22.50±0.73)% vs. (20.03±0.75)%;CD8+:(17.83±0.67)%vs.(15.55±0.75)%;P均<0.05];肝内淋巴细胞细胞因子白细胞介素-6(IL-6)和肿瘤坏死因子(TNF-α)合成增加[IL-6:(1.91±0.26)% vs. (0.93±0.12)%;TNF-α:(13.23±1.23)% vs. (8.16±0.66)%;P均<0.01]。结论 IRAK-M具有负调节肝内TLR9信号系统的作用。