The role of interleukin-8 produced by tumor induced fibroblasts in the development of cutaneous melanoma

Objective To determine the role of interleukin-8 (IL-8) produced by tumor induced fibroblasts in the development of cutaneous melanoma. Methods B16 melanoma cells induced L929 fibroblasts phenotype was transdifferentiated to myofibroblasts (MF) by co-culture in vitro. MF was monitored by morphology and immunophenotype for a-SMA. The level of IL-8 was detected by ELISA. The effect on B16 cell proliferation rate was estimated using MIT method in vitro. Melanoma implanting model was constructed in C57 mice. Results L929 MF phenotype could be modulated by B16 melanoma cells-derived transforming growth factor-β1 (TGF-β1) and elevated the levels of IL-8. L929 MF did not influence the B16 melanoma cells viability in vitro, but shortened the time of tumor formation and increased the incidence rates of tumors in C57 implanting model mice. Conclusion Fibroblasts can be activated by tumor cells and produce IL-8, which acts as an inflammatory cytokine promoting the development of cutaneous melanoma.     

Biocompatibility evaluation of polyethylene terephthalate artificial ligament coating hydroxyapatite by fibroblasts cells in vitro

Hydroxyapatite (HA) based materials have been widely used in the field of ligament tissue engineering in the past decades. It has been previously reported that HA can increase the penetration of marrow-derived mesenchymal stem cells (MSCs) and MSCs cells into scaffolds due to increased cell differentiation in biological media. Additionally, it was found that there are much difference between MSCs and anterior cruciate ligament (ACL) cells. For that reason, we mainly evaluate the biocompatibility of polyethylene terephthalate (PET) silk scaffold with fibroblasts cells in vitro. We cultured mouse fibroblasts cells on the substrate of PET fiber and PET-HA scaffold, respectively, and then observed the morphology by using scanning electron microscopy. Our data indicate that PET-HA scaffold has good biocompatibility with fibroblasts cells and can potentially be useful in enhancing the fibroblasts cell differentiation and proliferation.     

电视胸腔镜手术35例临床分析

1997年6月至1998年7月共进行电视胸腔镜手术（Video－assistedthoracoscopicsungery，VATS）35例，均获成功。结果表明VATS为胸外科提供了一种微创手术方法，具有术野显示清楚、损伤轻、痛苦小、恢复快、住院时间短、并发症少等优点。尤其适用于年老体弱、心肺功能较差、不能耐受开胸手术的患者。病期在2～6周内的胳购，可以通过会师的方法对决VATB的手术入路．胸内小弯度针缝合严密，灵活准确，最大限度保留了正常肺组织。     

PCR早期诊断结核性胸膜炎的临床价值

比较了PCR、涂片法、OT试验及胸膜活检4种方法诊断结核性胸膜炎的临床价值。结果显示：PCR法灵敏度为48％,显著高于其它诸法(P＜0．05或0．01),其特异度为91．6％,与其它诸法接近(P均＞0．05)。PCR法具有快速、灵敏、简便及不依赖结核菌培养等优点,应作为胸腔积液患者的常规检查项目。但其假阴性率、假阳性率分别达52％和8．4％,致其可信性受限。本文对产生假阴性和假阳性的原因进行了分析,并提出了减少假阴性和假阳性的方法。     

尿激酶对胸膜成纤维细胞分泌转化生长因子-β1的影响

目的探讨胸膜成纤维细胞(FB)分泌转化生长因子-β1(TGF-β1)的作用及尿激酶(UK)对其分泌作用的影响。方法取健康雄性SD大鼠胸膜,培养、纯化并鉴定FB。设对照组和实验组。对照组分为2个亚组:对照0组由不含胸膜FB的24个样本组成,加入无血清的RPMI 1640培养液;对照1组由24个胸膜FB样本组成,加入无血清的RPMI 1640培养液,培养24 h后,用酶联免疫吸附法测定上清液中TGF-β1的含量。实验组分为4个亚组,共24个样本,分别加入5 000(A组)1、0 000(B组)、20 000(C组)和30 000 IU/mL(D组)的UK,培养24 h后取上清液,测定TGF-β1的含量。结果胸膜FB分泌TGF-β1的量为(3035.655±394.975)ng/L;A、B、C、D组(5 000-30 000 IU/mLUK)对TGF-β1均有抑制作用,A组与B、C、D组之间比较有显著性差异(P<0.01),但B、C、D组之间比较无显著性差异(P>0.05)。对照0组未检测出TGF-β1。结论胸膜FB能分泌TGF-β1,UK能抑制其分泌。     

胸腔积液中脱落细胞p53基因突变的检测及其意义

目的　探讨聚合酶链反应 -单链构象多态性分析 (PCR- SSCP)检测胸液脱落细胞 p53基因突变在恶性胸腔积液 (MPE)诊断中的可行性及价值。方法　用 PCR- SSCP分别检测了 1 9例MPE及 1 2例结核性胸腔积液中新鲜脱落细胞标本的抑癌基因— p53基因 5～ 8外显子的突变情况 ,并与正常胸膜组织进行对照。结果　 7例 MPE有 p53基因突变 ,突变率为 36.84%。其中5例发生在第 5外显子 ,2例发生在第 7外显子 ,第 6、8外显子未检出突变 ,有 2例突变检出早于临床病理诊断。结核性胸液无 1例突变。结论　提示 p53基因突变在 MPE脱落细胞中较常见 ;PCR- SSCP分析胸液脱落细胞中 p53基因突变可以作为 MPE的一种辅助诊断方法     

PCR早期诊断结核性胸膜炎的临床价值

比较了PCR、涂片法、OT试验及胸膜活检4种方法诊断结核性胸膜炎的临床价值。结果显示：PCR法灵敏度为48％，显著高于其它诸法（P＜0．05或0．01），其特异度为91．6％，与其它诸法接近（P均＞0．05）。PCR法具有快速、灵敏、简便及不依赖结核菌培养等优点，应作为胸腔积液患者的常规检查项目。但其假阴性率、假阳性率分别达52％和8．4％，致其可信性受限。本文对产生假阴性和假阳性的原因进行了分析，并提出了减少假阴性和假阳性的方法。     

小鼠胚胎成纤维细胞对Lewis肺癌细胞增殖及凋亡的影响

目的 探讨小鼠胚胎成纤维细胞(MEF)是否具有肿瘤相关成纤维细胞相似的生物学活性.方法 原代培养MEF并经细胞免疫组化法鉴定α-SMA的表达情况;收集培养48h无血清高糖DMEM培养基上清并制备条件培养基MEF-CM,根据实验中Lewis肺癌细胞(LLC)细胞培养基不同,分为MEF条件培养基组、DMEM组,应用MTT法...     

癌胚抗原放射免疫分析的临床应用

本文报告了663例住院病人之血清CEA及36例胸水CEA放射免疫测定结果。476例肺、胃、肠道、肝、食道癌肿之血清CEA阳性率分别为64.29％、47.27％、40.63％、33.33％、31.48％;187例良性病人(食道除外),假阳性率分别为4.76％、11.96％、7.7％、26.47％;36例胸水中有17例肺癌患者,阳性率为94.12％;17例良性病变中无1例假阳性。结果认为测定胸水CEA水平对鉴别肺良、恶性疾病有其独特的临床价值。血清CEA水平不能独立地作为某些肿瘤的诊断依据。但鉴别原发与继发肝癌、肿瘤的术后随访以及对慢性萎缩性胃炎患者进行动态观察尚有一定意义。