血管内皮抑素微泡联合聚焦超声抗结肠癌肿瘤血管生成的实验研究

目的评估靶向载血管内皮抑素微泡联合改良聚焦超声定向辐照抑制结肠皮下易位原位结肠癌肿瘤血管生成的治疗效果。方法将65只结肠皮下易位原位结肠癌肿瘤的Balb／c裸鼠模型随机分为5组,每组13只：A组为空白对照组,裸鼠肿瘤未行任何治疗组;B组为单纯超声辐照组,仅行超声辐照,未使用任何造影剂;C组为超声辐照联合SonoVue裸微泡治疗组;D组为超声辐照联合Targestar．SA裸微泡治疗组;E组为超声辐照联合包载血管内皮抑素的微泡治疗组。分别于辐照前、辐照后1、14和28d测量肿瘤体积,绘制肿瘤体积生长曲线。实时超声造影检查,脱机分析峰值强度（PI）、局部血容量（RBV）和局部血流量（RBF）等造影参数。实验结束后切除肿瘤组织行光镜及电镜病理学检查,并通过CD34免疫组织化学检测评估肿瘤坏死面积（NA）和微血管密度（MVD）。结果辐照前各组肿瘤体积的差异无统计学意义（P〉O．05）;辐照后28d,C组、D组和E组肿瘤体积明显小于A组和B组,且E组明显小于c组和D组（均P〈0．01）。辐照前各组PI、RBV和RBF的差异均无统计学意义（均P〉0．05）;辐照后28d,C组、D组和E组PI、RBF和RBV较辐照前明显降低且明显低于A组和B组（均P〈0．05）,E组明显低于C组和D组（均P〈0．05）。电镜观察显示,C、D、E组肿瘤细胞核膜消失,核染色质溶聚,呈簇状不规则排列,线粒体空泡化和微血管内皮损伤出血,以E组最为明显,而A和B组鲜见。免疫组织化学染色显示,治疗后28d,E组肿瘤组织NA明显高于其他各组,而MVD则明显低于其他各组（均P〈0．01）。结论靶向载血管内皮抑素微泡联合改良聚焦超声定向辐照可以破坏结肠皮下易位原位结肠癌肿瘤微血管,并抑制肿瘤新生血管生成,增强结肠癌的治疗效果．将来可能是具有临床应用前景的结肠癌治疗新方法。     

CXCR4基因沉默对小鼠黑素瘤的抑瘤效应及器官转移影响

目的 探讨短发夹RNA(shRNA)沉默CXCR4基因对小鼠黑素瘤的抑瘤效应及器官转移的影响.方法 设计合成CXCR4特异性shRNA插入pSilencer载体,转染人高转移性黑素瘤细胞株MV3,通过小鼠尾静脉瘤细胞注射方法,建立黑素瘤转移模型,观察肿瘤生长情况,分析CXCR4基因沉默对黑素瘤细胞肝、脑、肺等实质性器官转移的影响.实验随机分为3组:A组(CXCR4-shRNA转染组)、B组(无关对照组)和C组(空白对照组).结果 小鼠黑素瘤皮下种植瘤成功率为100％,肿瘤生长曲线表明,A组肿瘤生长明显抑制.A组与C组和B组比较差异具有统计学意义(P＜0.01).肝、脑组织内转移瘤数目A组较B组和C组明显少.黑素瘤定向肺转移能力下降:B、C组和A组肺转移发生率分别为90.0％、87.5％和20.0％;B、C组和A组的肺转移结节数目分别为206、165和23个.结论 shRNA介导的CXCR4基因沉默可在黑素瘤皮下种植瘤产生抑瘤效应,明显降低肝、脑器官转移能力和定向肺转移能力.     

植入用缓释氟尿嘧啶治疗结直肠癌的实验研究

目的 研究氟尿嘧啶（5-Fu）缓释植入剂对结直肠癌移植瘤的治疗效果.方法 将50只直肠癌荷瘤鼠随机分为5组,每组10只.A、B组于瘤周植入5-FU缓释剂,剂量分别为200mg/kg和100 mg/kg;C、D组于瘤周注射5-FU注射液,剂量分别为200 mg/kg和100 mg/kg;E组不予任何治疗.分别于给药后0、3、6、9和12 d,观察裸鼠生存情况、体质量变化及肿瘤体积,12 d后处死小鼠.结果 A、B组肿瘤生长曲线平缓,12 d后A、B、C及D组抑瘤率分别为72%、51%、8%及5%,A、B组肿瘤体积与C、D组比较,差异有统计学意义（P＜0.05）.A、B、C和D组在给药3 d后体质量下降,其中以C组最为明显;以后各组体质量增加,12 d后,各组小鼠体质量间差异无统计学意义（P＞0.05）.在实验过程中,A、B、C和D组小鼠分别死亡1、0、4和1只.结论 5-FU缓释植入剂于瘤周植入能安全有效地抑制结直肠癌移植瘤的生长.     

低功率超声栓塞肿瘤新生血管治疗肿瘤的临床研究

目的探讨低功率超声辐射血管内微泡剂对恶性肿瘤血管的临床生物疗效.方法 83例恶性肿瘤患者,外周静脉注入CO2微泡剂,以低功率低频率超声(0.5 W)经皮辐射肿瘤局部,每周2～3次,每例病人治疗3～6次.结果超声组50例疗效:治疗后病变缩小达50%以上,呈部分缓解为13例,有效率占总数的26%;稳定为27例,占总数的54%;进展为4例,占总数的8%;生活质量评分改善为28例,占总数的56%;治疗后出现肝功能等指标升高的4例,占总数的8%,均为与化疗联合治疗者;癌痛不适改善为35例,占总数的70%;治疗后局部一般未发现明显损伤;肝脏肿瘤局部治疗后,肝酶ALT、AST未见明显升高.结论低功率超声辐射血管内微泡剂可以成为局部治疗恶性肿瘤的一种无创的新方法.     

131I-Herceptin在乳腺癌裸鼠模型中的显像及体内分布研究

目的 研究131I-Herceptin荷人乳腺癌裸鼠体内的生物学分布及荷人乳腺癌裸鼠的放射免疫显像特点.方法 以对数生长期的SK-BR-3乳腺癌细胞皮下接种BALB/c-neu裸鼠建立动物模型,对荷瘤小鼠模型进行SPECT连续显像.测量小鼠注药后的4、12、24、48 h各脏器每克组织每分钟的放射性计数(cpm/g),并计算T/NT以及每克组织的放射性计数占注射剂量放射性计数的百分比(％ ID/g).结果 (1)SK-BR-3细胞皮下接种BALB/c-neu裸鼠后成瘤率96％.(2)实验组对比对照组,显像对比明显;实验组T/NT以及肿瘤组织％ID/g显著高于对照组(P＜0.01).结论 131I-Herceptin在SK-BR-3乳腺癌裸鼠肿瘤组织中的浓聚明显,具有良好的靶向作用.     

20 kHz超声联合微泡诱导人前列腺癌PC3细胞的细胞自噬及早期凋亡

目的探讨低频、低功率超声联合微泡造影剂诱导人雄激素非依赖性前列腺癌PC3细胞早期细胞凋亡及自噬。方法以频率20kHz、声功率80mW超声连续波辐照人前列腺癌PC3细胞悬液60s,之后分为单纯微泡组(A)、单纯超声组(B)、超声联合微泡组(C)、空白对照组(D),分别给予相应处理。辐照后继续培养24h,以流式细胞仪检测细胞早期凋亡情况,吖啶橙染色荧光显微镜观察细胞胞浆内酸性囊泡,透射电镜观察细胞自噬泡。结果 4组细胞早期凋亡率差异有统计学意义(P0.01);两两比较,除A组与D组差异无统计学意义(P0.05)外,余差异均有统计学意义(P0.01)。C组细胞核基本正常,胞浆内可见大量发红色荧光的酸性囊泡及大量由双层膜包裹的自噬泡或自噬体。D组细胞形态基本正常,胞浆内未见到明显自噬泡形成。结论低频低功率超声联合微泡造影剂能明显提高人雄激素非依赖型前列腺癌PC3细胞的早期凋亡率,并可促进细胞自噬。     

超声辐照微泡介导双自杀基因转染对裸鼠乳腺癌杀伤作用的在体研究

目的：探讨超声辐照微泡介导CD/TK双自杀基因质粒转染对在体乳腺癌的杀伤效应。 方法：用人乳腺癌MCF-7细胞建立裸鼠移植瘤模型后,将荷瘤裸鼠随机分为对照组、质粒组、超声辐照组、超声辐照微泡组,每组5只。对照组仅给予CD与TK相应的前药（5-氟胞嘧啶与更昔洛韦）;质粒组注射质粒（含CD/TK基因）与前药;超声辐照组注射质粒与前药,并予超声辐照;超声辐照微泡组注射靶向超声造影剂（质粒与微泡混合物）与前药,并予超声辐照。实验期间记录裸鼠肿瘤生长情况;处理结束后5 d,剥除肿瘤,计算各组的抑瘤率;用倒置荧光显微镜观察目的基因瘤内转染情况,计算基因转染效率;RT-PCR法检测目的基因的表达;免疫组化法计数肿瘤的微血管密度（MVD）。 结果：与对照组比较,质粒组肿瘤的生长无统计学差异（P>0.05）,而超声辐照组与超声辐照微泡组肿瘤生长被明显抑制（均P<0.05）,质粒组、超声辐照组、超声辐照微泡组的抑瘤率分别为3.72%、21.40%、47.13%。质粒组、超声辐照组、超声辐照微泡组基因转染效率分别为0.78%、2.81%、23.87%,后者转染效率明显高于前两组（均P<0.05）。超声辐照组与超声辐照微泡组肿瘤组织中均出现CD/TK基因阳性片段,而对照组与质粒组的肿瘤组织中未见。超声辐照组与超声辐照微泡组肿瘤组织MVD计数均明显低于对照组,且超声辐照微泡组低于超声辐照组（均P<0.05）,质粒组MVD计数与对照组无统计学差异（P>0.05）。 结论：超声辐照微泡介导的双自杀基因系统能有效提高基因转染效率与表达,从而增强对肿瘤生长和肿瘤微血管的生成的抑制作用。     

彩色多普勒超声联合核素动态显像在肾移植术后的应用

目的：探讨彩色多普勒超声、核素动态显像在肾移植术后早期并发症诊断与鉴别诊断中的应用价值。方法：收集肾移植术后肾功能恢复不佳且行彩色多普勒超声和核素肾动态显像检查的患者59例,分为3组：急性排斥反应组18例,加速性排斥反应组12例、急性肾小管坏死组29例,同时收集术后肾功能恢复良好的正常组20例,分别统计上述4组彩色多普勒的阻力指数（RI）、移植肾体积、血流分布,分析彩色多普勒在鉴别诊断中的价值。计算核素肾动态显像的指标：灌注相内1min时腹主动脉放射性计数与移植肾放射性计数比值（K1min/A1min）,功能相20min时膀胱/移植肾放射性计数比值（B/K）,分析其诊断价值。结果：彩色多普勒检查指标中,当移植肾体积增大、血流减少、阻力指数升高均提示移植肾病变,以阻力指数较敏感,但特异性不高。根据核素肾动态显像指标的计算数据,K1min/A1min比值联合B/K比值在诊断排斥反应与肾小管坏死方面准确性较高,分别达到96.7%和89.7%;K1min/A1min〈4和B/K〈1提示排斥反应,K1min/A1min≥4和B/K〈1提示肾小管坏死。结论：彩色多普勒联合核素动态显像对于肾移植术后排异、急性肾小管坏死、移植肾功能延迟恢复的诊断与鉴别诊断具有很好的临床价值,二者联合应用,互补长短。     

超声定位辐照载血卟啉微泡治疗兔肝VX2肿瘤的实验研究

目的探讨超声定位辐照载血卟啉微泡介导药物靶向释放技术治疗兔VX2肝移植瘤的效果。方法利用35只新西兰大白兔建立肝VX2移植瘤模型,并随机均分为超声定位辐照载血卟啉微泡组（US＋LMLH组）、超声定位辐照血卟啉组（US＋HP组）、超声定位辐照空白脂质微泡组（US＋MB组）、单纯载血卟啉微泡组（LMLH组）、单纯血卟啉组（HP组）、单纯超声辐照组（US组）和生理盐水对照组（C组）。治疗前后用二维超声、CDFI及CEUS观察肿瘤大小、回声及血流灌注情况,计算肿瘤体积大小及生长抑制率;同时观察不同处理组肝内转移及远处转移情况;并用透射电镜观察肿瘤细胞的超微结构。结果US＋LMLH组肿瘤内部呈混合回声,CDFI及超声造影显示肿瘤的滋养血管明显减少,生长抑制率高于其他各组;在肝内及远处转移方面,US＋LMLH组较少转移,明显优于其他各组;超微结构显示US＋LMLH组细胞膜破坏,线粒体明显肿胀。结论超声定位辐照载血卟啉微泡能有效激活血卟啉,具有较强的体内抑瘤效果。     

不同机械指数诊断超声联合微泡对裸鼠胰腺癌移植瘤化疗的影响

目的探讨不同机械指数(MI)诊断超声联合微泡对裸鼠人胰腺癌荷瘤模型肿瘤局部血流及化疗药物浓度的影响。方法经裸鼠双侧后腿注射肿瘤细胞,建立裸鼠人胰腺癌荷瘤模型33只,随机分为A、B、C组,行超声造影、化疗药物注射及超声辐照/假照。随机选取荷瘤裸鼠一侧后腿为治疗侧(超声辐照),另一侧为对照侧(超声假照)。辐照/假照前后均行超声造影,获得时间-强度曲线,峰值强度(PI)及AUC。于超声辐照/假照前经尾静脉注射阿霉素(DOX),并于超声辐照/假照过程中实时推注微泡;A、B、C组治疗侧超声辐照的MI分别为0.3、0.7、1.1。超声辐照/假照后,行DOX药物浓度检测及组织病理检查。并于超声辐照/假照前,测定不同MI对应的峰值负压范围。结果 A组治疗侧DOX药物浓度明显高于对照侧[(1.45±0.53)μg/g vs(1.07±0.46)μg/g;t=-5.163,P=0.001]。B组及C组中,治疗侧与对照侧药物浓度差异均无统计学意义(Z=-0.297、-0.357,P=0.766、0.721)。超声造影定量分析显示,除B组对照侧PI、B组及C组对照侧AUC外,超声辐照/假照后各组中治疗侧及对照侧均较超声辐照/假照前PI均升高、AUC均增大(P均0.05)。各组对照侧与治疗侧肿瘤组织病理表现相似,未见明显出血及细胞肿胀。MI为0.3(A组)、0.7(B组)、1.1(C组)时,对应的实测峰值负压范围分别为0.81～0.83MPa、0.96～1.32 MPa和2.29～2.53 MPa。结论 MI为0.3的诊断超声联合微泡可增强肿瘤局部血流灌注,促进人胰腺癌荷瘤裸鼠肿瘤局部化疗药物释放。     

The significance of morphologic and immunohistochemical patterns in the diagnosis of undifferentiated endometrial sarcoma

We present the case of a 56-year-old woman presenting an uterine tumor associated with pain and vaginal bleeding. The slides from the tumor were studied with monoclonal antibodies to Vimentin, CD 10, KL 1, Actin, Desmin, CD 34, S 100 protein, Ki 67, PCNA. The tumor cells were Vimentin and CD 10 diffuse positive, focal Actin positive, Desmin, KL 1, CD 34 and S 100 protein-negative. 85% of the tumor cells were PCNA positive and 25 % were Ki 67 positive. We conclude that undifferentiated endometrial sarcoma may express specific markers but also muscle-related antigens. These findings reflect a common relationship of the endometrial stromal cells to the myometrium. Knowledge of these immunoreactivity patterns is essential when evaluating poorly differentiated uterine endometrial sarcoma .It simulates morphological pattern of muscle uterine tumors.     

肝脏血管平滑肌脂肪瘤的诊断与治疗

目的 总结肝脏血管平滑肌脂肪瘤的临床、影像及病理特征,探讨提高术前确诊率的途径.方法 回顾性分析2000年至2007年第二军医大学东方肝胆外科医院收治并经病理检查证实的73例肝脏血管平滑肌脂肪瘤患者的影像学特点及诊治经验.根据影像学特点对患者进行分型并进行相应治疗.结果 术前确诊7例.B超检查诊断率为0,CT检查诊断率为13%(7/56),MRI检查诊断率为6%(2/33).根据影像学检查结果分型:血管瘤型6例,脂肪瘤型17例,平滑肌瘤型4例,混合型46例.手术切除72例,RFA治疗1例.24例患者出现肺部感染、胸腔和腹腔积液、轻度肝功能损害.术后免疫组织化学检测阳性率依次为:HMB45＞平滑肌肌动蛋白＞波形蛋白＞增殖细胞核抗原＞CD34＞癌胚抗原蛋白＞CD18＞CD19＞p53.1例术后因复发死亡.结论 肝且庄血管平滑肌脂肪瘤易误诊,影像学分型有助于术前正确诊断,治疗上应积极手术切除.     

肝淋巴管瘤1例报道

目的 探究此罕见肝脏肿瘤的特征,提高对本病的认识,提高诊断准确率,探索本疾病的规范诊疗方法。方法 回顾性分析我中心1例采用解剖性肝段切除的肝脏淋巴管瘤的术前临床资料,术后免疫组化标记物Ki67、CD31、CD34、CK19等评判此例肿瘤良恶性,术后复查血清学标记物、肝脏彩超、CT、MRI等评估患者的预后及肿瘤复发情况。结果 此例患者入院血常规、生化检查及肿瘤学标志物均在正常范围,无乙肝病史,术前诊断为肝S6段囊腺瘤,采用肝S6段肝肿瘤切除+胆囊切除术,术后免疫组化显示CK（-）,CD34（+）,CD31（+）,Ki67（<1%）,考虑为淋巴管瘤可能性大;术后快速康复,无手术相关并发症的发生。截止2022.3.17,规律随访13个月,未见肿瘤复发。结论 术后病理结合免疫组化结果显示此例肝淋巴管瘤为良性肿瘤,整个肝段切除为治疗有效手段,近期预后良好,患者的中远期疗效需增加样本量并长期随访。     

介入治疗对兔VX2肝癌MMP-2/PCNA/VEGF表达的影响及其意义

目的：模拟不同方法介入治疗对兔VX2肝癌基质金属蛋白酶（MMP-2）、增殖细胞核抗原（PC-NA）、血管内皮生长因子（VEGF）表达的影响。方法：将VX2瘤细胞接种于40只新西兰大白兔肝左叶，建立VX2肝癌模型，随机分为4组，每组10只。介入治疗前MRI测量并记录肿瘤直径。经股动脉途径行肝固有动脉插管，分别注入生理盐水（对照组）、水化碘油（A组）、Ad-p53（B组）、Ad-p53＋水化碘油（C组）。术后1周处死动物，取肿瘤组织制作石蜡切片（HE）染色，镜下观察肿瘤组织坏死情况。免疫组化方法测定MMP-2／PCNA/VEGF的表达。结果：经肝动脉插管介入治疗1周后，A、B、C组肿瘤生长受到明显抑制，与对照组比较，P均〈0.05。单纯碘油栓塞后，肿瘤区的MMP-2、PCNA及VEGF的表达略有升高，与对照组相比P〉0.05；B组与C组的MMP-2、PCNA及VEGF的表达阳性率降低，与对照组相比，P均〈0.05；有转移的MMP-2、PCNA及VEGF的表达阳性率均高于无转移者（P〈0.05）；MMP-2与VEGF、PCNA之间之间有相关性（P〈0.05）。结论：碘油＋Ad-p53可抑制肿瘤的生长，抑制肿瘤新生血管形成，减少转移。MMP-2、PCNA、VEGF的增高预示着肿瘤的高转移、高增殖能力，肿瘤血管的高形成能力。     

Endoluminal management of arterioportal fistulae in liver transplant recipients: a single-center experience

Transcatheter embolization of arterioportal fistulae in liver transplant recipients is restricted to symptomatic arterioportal fistulae. Angiograms of liver transplant recipients from a single university medical center were retrospectively reviewed. Hemodynamically significant arterioportal fistulae were defined as those exhibiting opacification of the main portal vein of the transplanted hepatic graft or its first order branch with or without portal venous changes by Doppler ultrasound imaging. Six arterioportal fistulae were found. Doppler ultrasound imaging detected 50% of all arterioportal fistulae and all 3 hemodynamically significant arterioportal fistulae. Three successful embolizations were performed. Follow-up (37 to 67 months) demonstrated patent hepatic arteries and no parenchymal ischemic changes with graft preservation. High-throughput arterioportal fistulae may require larger intrahepatic artery branch embolization. There is a window of opportunity for embolizing significant arterioportal fistulae before their progression to large symptomatic, high through-put arterioportal fistulae with their added risk of ischemic changes before and after embolization.     

结直肠癌组织中CyclinB1、p34cdc2、PCNA和Ki-67表达的研究

目的探讨结直肠癌发生和分化中CyclinB1、p34cdc2、PCNA和Ki-67表达异常及其临床病理学意义.方法采用免疫组化SABC法检测CyclinB1、p34cdc2、PCNA和Ki-67在16例结直肠癌组织中蛋白的表达.结果CyclinB1和p34cdc2染色定位于细胞胞浆和(或)胞核内.PCNA和Ki-67染色定位于胞核内.在研究病例中有87.5%(14/16)CyclinB1阳性表达,81.2%(13/16)p34cdc2阳性表达,93.7%(15/16)PCNA阳性表达,81.2%(13/16)Ki-67阳性表达.低分化结直肠癌的CyclinB1、p34cdc2、PCNA和Ki-67阳性率明显高于高中分化结直肠癌,CyclinB1、p34cdc2、PCNA和Ki-67的表达具有高度一致性.结论CyclinB1、p34cdc2、PCNA和Ki-67的阳性表达率及表达强度同结直肠癌分化程度有密切关系.     

Transcatheter Embolization for the Treatment of Misperfusion After Hepatic Artery Chemoinfusion Pump Implantation

Background: The use of surgically implanted chemoinfusion pumps for the treatment of hepatic metastases from colorectal carcinoma can be complicated by intra- or extrahepatic misperfusion. This may result in suboptimal tumor exposure to the chemotherapeutic agent and injury to other gastrointestinal organs. Misperfusion can be managed by selective arterial transcatheter embolization.Methods: Between 1989 and 1996, 16 patients with liver metastases from colorectal carcinoma and with hepatic artery chemoinfusion pump misperfusion were treated using transcatheter coil embolization. Six female and 10 male patients (age range, 34–84 years; median, 51.5 years) were identified by retrospective review of the records of the Department of Interventional Radiology. After pump placement, abnormal liver perfusion scan or methylene blue endoscopy study results prompted angiography with coil embolization. After embolization, the imaging studies were repeated and patients were monitored in the Oncology Clinic.Results: Eight patients exhibited intrahepatic misperfusion (group 1) and eight extrahepatic misperfusion (group 2). Coil embolization was immediately successful in 100% of patients in group 1, with restoration of normal hepatic perfusion, and in 75% in group 2. There were no immediate procedure-related complications. Follow-up periods ranged from 1 to 23 months (median, 13.5 months). Embolization was unsuccessful for two patients (in group 2), who tolerated a modified chemotherapeutic regimen, with follow-up periods of 18.5 and 22 months.Conclusions: Transcatheter coil embolization is the therapy of choice for the management of hepatic artery chemoinfusion pump misperfusion. It is rapid, effective, and well tolerated by patients and obviates the need for additional surgical intervention.     

The establishment of the hemangioma model in nude mouse

Background/Purpose

Hemangioma is one of the most common benign tumors in children. Most of them could regress spontaneously; however, the pathogenesis and triggering of regression are still unknown. Here, we introduce a new means in which the specimen of human hemangioma was transplanted into nude mice subcutaneously. At the same time, high dose of estradiol was administered to the experimental nude mice intramuscularly to promote implantation and proliferation of hemangioma endothelial cells. By this means, a credible animal model of human hemangioma was established. Further studies on pathogenesis and medical intervention of hemangioma could be carried on with this model.

Methods

The specimen of grafted hemangioma was taken from a 6-month-old girl, in whom the hemangioma grew rapidly, by surgery. The fresh estrogen receptor-positive strawberry hemangioma specimens were sliced and inoculated subcutaneously into 16 nude mice that were divided randomly into 2 groups, namely, group 1 (n = 8) with normal diet and group 2 (n = 8) with normal diet and 10⁻⁷ mg estradiol administered intramuscularly every week additionally. The size of grafts was measured weekly. All of the experimental mice were killed at 90 days after graft. Hemangioma tissues were harvested and sliced into 4 to 5 μm sections. Living grafts were subjected to histopathologic examination and immunohistochemistry for CD34 and Ki-67.

Results

All of the sizes of hemangioma tissues in group 1 were diminished distinctly in 30 days. Thirteen samples of hemangioma were almost absorbed and disappeared completely in 90 days. The sizes of hemangioma in group 2 were larger than primary specimens. It was observed from the section of hemangioma that endothelial cells proliferate vividly and fresh capillary blood vessels grew up into the body of hemangioma. The mean positive cell rate of CD34 in group 2 was 48.49 ± 3.90 and the Ki-67 was 15.04 ± 2.44. The transplanted tumor cell retained the histologic characters of original tumor.

Conclusion

The capillary hemangioma model established in nude mice retains almost all the biologic character of original human hemangioma and could be widely used in further study on hemangioma.     

肝脏上皮样血管内皮瘤1例分析并文献回顾

目的探讨肝脏上皮样血管内皮瘤的临床病理、影像学表现及治疗。方法分析我院一例经病理证实的肝脏上皮样血管内皮瘤的临床表现、影像表现、病理组织特征,并进行文献相关回顾,探讨该罕见肿瘤的临床、影像、病理特征及治疗方案。结果肝脏上皮样血管内皮瘤的临床表现特异性差,影像表现为低密度,文献病例存在"包膜回缩征"和"棒棒糖征",强化特征随肿瘤大小变化,病理表现为上皮样细胞等细胞组成,呈条索状、巢状或腺样排列,免疫组化CD31、CD34阳性,治疗以肝肿物切除与肝移植手术为主。结论肝脏上皮样血管内皮瘤临床、影像表现特异性差,病理组化是确诊的方法,以手术治疗为主,在临床诊治中应予以重视。     

组织特异性胞嘧啶脱氨酶和5-氟胞嘧啶热化疗对裸鼠结肠癌肝脏转移的影响

目的 探讨组织特异性胞嘧啶脱氨酶/5-氟胞嘧啶(CD/5-FC)系统热化疗对裸鼠结肠癌肝脏转移的影响.方法 将45只裸鼠按随机数字表法分为3组:对照组、非热疗组、热疗组,每组15只.门静脉注射法建立结肠癌肝脏转移动物模型,3组分别给予不同的治疗方法.采用χ2检验和单因素方差分析3组肝脏肿瘤转移率、转移数目;观察各组病理学变化、肿瘤细胞凋亡指数;荧光定量RT-PCR和Westernblot检测肿瘤组织中CD基因的表达情况.结果 对照组、非热疗组、热疗组肝脏平均转移癌结节数目和转移率分别为(4.6±1.3)、(2.2±1.0)、(0.5±0.8)个和100.0%、60.0%、13.3%,3组比较差异有统计学意义(F=25.898,χ2=5.208,19.548,5.168,P<0.05);肿瘤细胞凋亡指数平均为4.6%、9.9%和17.4%.热疗组可见大量细胞空泡变性、坏死、溶解现象,有较多的凋亡小体形成.3组均可以检测到CD基因的表达.结论 组织特异性CD/5-FC系统热化疗对转CD基因结肠癌LoVo细胞裸鼠肝脏转移有明显的抑制作用.