目的 探索实体肿瘤内部不同区域的间质液压（IFP）分布的异质性。方法 通过建立新西兰大白兔的皮下浅肌层VX2移植瘤模型,通过超声造影观察肿瘤的大小、形状、血流灌注等成瘤情况,并在超声引导下通过针芯法（WIN法）测量41只荷瘤兔VX2移植瘤内部不同区域的IFP。结果 41只荷瘤兔的VX2移植瘤的中央IFP为（23.79±8.07） mmHg、肿瘤外周1/2IFP为（15.58±5.22）mmHg、肿瘤外周1/4IFP为（8.29±5.47）mmHg,IFP从中央到外周逐步降低（F=70.85,P<0.001）。结论 VX2移植瘤内不同区域的IFP存在异质性,即从中央到外周IFP呈梯度显著降低。

Objective To explore the heterogeneity of interstitial fluid pressure（IFP）distribution in different regions of solid tumors．Methods The model of VX2 tumor was established in New Zealand white rabbits．The size,shape and blood perfusion of the tumor were observed by contrast-enhanced ultrasound,the IFP of VX2 tumor in 41 rabbits was measured by the wick-in-needle method（WIN method）under the guidance of ultrasound．Results The mean values of central IFP,peripheral 1/2 IFP and peripheral 1/4 IFP were（23.79±8.07） mmHg,（15.58±5.22 ）mmHg and （8.29±5.47） mmHg,respectively by statistical analysis,the IFP values changed significantly with different regions（F=70.85,P<0.001）．Conclusions There is heterogeneity of IFP in different regions of VX2 xenografts,that is,from the center to the periphery,the IFP decreased significantly．

目的 探究超声-微泡介导的miR-128通过调节PTEN对乳腺癌细胞阿霉素耐药的影响。方法 qPCR检测miR-128在乳腺癌细胞系中的表达,并利用结合微泡的miR-128质粒(质粒+超声+SF6微泡)转染细胞,探究超声-微泡介导的miR-128对乳腺癌细胞阿霉素耐药的影响。CCK8实验检测乳腺癌细胞的活性;qPCR检测过表达miR-128后对PTEN的影响和对乳腺癌细胞阿霉素耐药的影响。结果 miR-128在阿霉素耐药乳腺癌细胞中低表达;过表达miR-128能够增加乳腺癌细胞对阿霉素的敏感性,超声-微泡介导的miR-128进一步增强了乳腺癌细胞对阿霉素的敏感性;miR-128通过调节PTEN从而促进乳腺癌细胞对阿霉素耐药。结论 miR-128过表达可以增强乳腺癌对阿霉素的敏感性,超声-微泡介导的miR-128进一步增强了乳腺癌细胞对阿霉素的敏感性,本研究为乳腺癌阿霉素耐药的治疗提供了新的分子靶标和治疗途径。

Objective To explore the effect of ultrasound-microbubble mediated miR-128 on doxorubicin resistance in breast cancer cells by regulating PTEN. Methods Quantitatine PCR (qPCR) was used to detect the expression of miR-128 in breast cancer cell lines, and the ultrasound-microbubble combined miR-128 plasmid(plasmid+ultrasound+SF6 microbubbles) was used to transfect the cells to explore the effects of ultrasound-microbubble mediated miR-128 on doxorubicin resistance in cancer cells. The CCK8 experiment was used to detect the activity of breast cancer cells; qPCR was used to detect the effect of overexpression of miR-128 on PTEN and the effect on doxorubicin resistance of breast cancer cells. Results miR-128 was under-expressed in doxorubicin-resistant breast cancer cells; overexpression of miR-128 increased the sensitivity of breast cancer cells to doxorubicin,ultrasound-microbubble mediated miR-128 further enhanced breast cancer cells sensitivity to doxorubicin; miR-128 promote resistance to doxorubicin in breast cancer cells by regulating PTEN. Conclusion Overexpression of miR-128 could enhance the sensitivity of breast cancer to doxorubicin. Ultrasound-microbubble mediated miR-128 further enhanced the sensitivity. This study provided a treatment for doxorubicin resistance in breast cancer with new molecular targets and therapeutic approaches.

目的 探讨Graf法超声在6个月以内婴儿发育性髋关节异常筛查及随访中的应用价值。方法 选取我院2014年1月—2017年6月2 000例0～6个月婴儿(4 000个髋关节)为标本,采用Graf法超声检查进行筛查,检测发病率,并对部分髋关节异常的婴儿进行随访。结果 Ⅰ型髋关节3 572例(89.3%),Ⅱ型336例(8.4%),Ⅲ型92例(2.3%)。随访的272例发育性髋关节异常婴儿中,86例Ⅱ型转化为Ⅰ型,42例Ⅲ型转化为Ⅰ型,46例Ⅱa型转化为Ⅱb型,98例Ⅱ型无转化。结论 Graf法超声检查在婴儿髋关节异常筛查以及随访中有较高的使用价值。Graf法超声检查安全性好、有效率高,有助于发育性髋关节异常疾病的早期诊断及早期治疗。