细胞凋亡相关斑点样蛋白与半胱氨酸蛋白酶-1在肝癌中的表达及临床意义

目的分析细胞凋亡相关的斑点样蛋白（ASC）与半胱氨酸蛋白酶-1（Caspase-1）在肝癌与癌旁组织中的表达及临床意义。方法对30例术前未使用放疗与化疗的肝癌与癌旁组织标本采用免疫组化LSAB法进行ASC、Caspase-1测定，并对各指标进行分析。结果ASC阳性率在肝癌与癌旁组织中分别为10．00％（3／30）和73．33％（22／30），组间阳性表达率差异有统计学意义（P〈0．01）；Caspase．1阳性率分别为23．33％（7／30）和66．67％（20／30），组间阳性表达率差异有统计学意义（P〈0．01）。ASC与Caspase-1两指标在癌组织中的表达均降低，两者不相关（P〉0．05），在癌旁组织中表达均显著增高，两者呈正相关（r=0．722，P〈0．01）。结论ASC、Caspase-1在肝癌中表达低，且显著低于癌旁组织，提示ASC、Caspase-1与肝癌的凋亡、发生及发展过程密切相关，可作为肝癌的诊断及治疗有希望的靶点。     

热性惊厥患儿血清褪黑素水平和细胞免疫功能的变化及其临床意义

Objective To investigate the changes of melatonin and cellular immunological function in children with febrile seizures and its clinical significance. Methods 50 children, including 23 cases with complex febrile seizure (CFS) and 27 cases with simple febrile seizure (SFS) , and 25 cases with upper respiratory infections children selected as control group were enrolled in this study. Serum melato- nin was measured by enzyme-linked immunosorbent assay (ELISA) and cellular immunological function was measured by flow eytomcter. Results The levels of serum melatonin in the 3 groups of CFS, SFS, control were(14. 91±2. 61) ng/L, (20. 72±2. 54) ng/L, (23.93± 2. Ol) ng/L, respectively. The melatonin levels in CFS children were significantly decreased than that in control group and SFS children (P <0. O1). CD3 + ,CD4 +, the ratio of CD4 + /CD8 + and CD8 + in CFS group were significantly decreased than that in control group and SFS group (P <0.01). The ratio of CD4 +/CD8 + in SFS group was significantly decreased than that in control group (P <0.05), but CD3 + ,CD4 + and CD8 + had no statistics significance among these groups(P >0. 05). The serum rnelatonin level were positive related withdecreaseddegreeofCD3+,CD4+ andtberatioofCD4+ /CDS+ (r≥0. 472, P <0.05). Conclusion The disorder cfcellular immunological function was possible related with the loss of serum melatonin, and the loss of serum melatonin maybe one of the reasons for febrile seizures relapse and brain injured.     

神经营养素-3对大鼠脊髓损伤后caspase-3基因表达的影响

【目的】研究神经营养素-3(NT-3)对大鼠脊髓损伤后caspase-3基因表达的影响,探讨NT-3在脊髓损伤修复中的作用。【方法】SD大鼠80只,分为生理盐水对照组和NT-3组。用RT-PCR分析方法观察两组caspase-3基因的表达情况。【结果】①脊髓损伤后caspase-3基因mRNA转录水平升高;②NT-3组与生理盐水对照组相比caspase-3基因转录水平下降(P<0.05)。【结论】NT-3抑制caspase-3基因的表达,可能是促进神经纤维损伤后再生的一个重要因素。     

血管内皮生长因子在宫颈癌中的表达及其与新辅助化疗疗效的关系

【目的】探讨血管内皮生长因子（VEGF）在宫颈癌中的表达及其与新辅助化疗（NACT ）疗效的关系。【方法】采用免疫组化检测29例ⅠB～Ⅱ A 期宫颈癌组织 NACT 化疗前后VEGF的表达,并分析其与NACT的关系。【结果】29例ⅠB～ⅡA期宫颈癌患者NACT 化疗前VEGF阳性表达率51．7％（15／29）,显著高于NACT化疗后6．9％（2／29）（ P＜0．05）。NACT化疗后,完全缓解2例,部分缓解18例,稳定9例,无进展病例,有效率为69．0％,疾病控制率为100．0％。【结论】宫颈癌组织中VEGF的表达可作为NACT疗效的参考指标。     

凋亡因子Apaf-1在大肠肿瘤中的表达及其与Caspase-3及Ki-67相关性研究

目的探讨 Apaf-1在大肠癌中的表达及其与Caspase-3及Ki-67的相关性。方法收集大肠癌（肠癌组）、腺瘤（腺瘤组）及正常黏膜组织（正常组）标本,每组各100例,免疫组化 SP 染色方法检测 Apaf-1表达,并分析其与Caspase-3、Ki-67相关性。结果肠癌组、腺瘤组及正常组中,Apaf-1蛋白的阳性表达率分别为39.00%、88.00%、95.00%;Caspase-3蛋白的阳性表达率分别为45.00%、83.00%、91.00%,肠癌组中 Apaf-1、Caspase-3阳性率低于腺瘤组及正常组（P ＜0.05）;Ki-67蛋白的阳性表达率分别为68.00%、26.00%、8.00%,肠癌组中Ki-67阳性率高于腺瘤组及正常组（P＜0.05）。Apaf-1与Caspase-3阳性表达呈正相关（r=0.345,P ＜0.01）,与Ki-67阳性表达呈负相关（r=-0.361,P ＜0.01）。结论 Apaf-1、Caspase-3、Ki-67均参与了大肠癌的发展过程,推测大肠癌患者 Apaf-1受到抑制,进而Caspase-3活化减少,肿瘤细胞增加。     

Toxic Effects of Violamycin BI,Carminomycin and Daunorubicin on the Myocardium of Rabbits

Abstract: Cardiac toxicity of the new anthracycline antitumour antibiotics violamycin BI (V) and carminomycin (C) was studied in comparison with daunorubicin (D). Rabbits were intravenously given total doses of 0.1–1.5 mg/kg V or C, and 0.64–18 mg/kg D, respectively, twice weekly for one month. When examined two to six days, two and four weeks, respectively, after the last drug administration the gross findings consisted of hydropericard, hydrothorax and ascites in some animals. Histologically, loss of striation and focal necrosis of cardiac muscle cells and subsequently chronic inflammatory reactions and/or proliferation of mesenchyma cells were mostly found. These alterations were somewhat more pronounced in rabbits treated with V than in animals received D or C. At equitoxic doses of the antibiotics tested the ultrastructural lesions in the myocardial cells were altogether less marked after treatment with D than with C or V.     

DADS对人宫颈癌细胞生长及VEGF蛋白表达的影响

【目的】探讨二烯丙基二硫（DADS）对人宫颈癌Hela细胞生长及血管内皮生长因子（VEGF）蛋白表达的影响。【方法】体外培养人宫颈癌Hela细胞,采用MTT比色法测定DADS对Hela细胞增殖活性的影响;裸鼠皮下注入人宫颈癌Hela细胞建立人宫颈癌裸鼠并种移植模型,观察腹腔注射DADS对宫颈癌移植瘤在Balb／c-nu裸鼠体内生长情况的影响,HE染色后进一步观察DADS对移植瘤组织形态的改变,SP免疫组织化学法观察移植瘤细胞VEGF蛋白酌表迭情况。【结果】DADS对人宫颈癌Hela细胞增殖有一定抑制作用,并呈浓度依赖性,以DADS60mg／L高剂量药物组抑制活性最强;腹腔注射DADS剂量为50mg／kg、100mg／kg和200mg／kg时,细胞增殖抑制率分别为28．1％、38．6%、55．3％,瘤重抑制率分别是35．9％,49．9％,55．4％;HE染色结果示DADS具有杀伤人宫颈癌裸鼠移植瘤细胞作用;SP免疫组织化学法示DADS下调移植瘤细胞VEGF表达。[结论]DADS具有抑制人宫颈癌细胞的生长作用,此作用可能与下调移植瘤细胞VEGF表达有关。     

Differential retention of alpha-vitamin E is correlated with its transporter gene expression and growth inhibition efficacy in prostate cancer cells

BACKGROUND: Epidemiological studies showed Vit E has protective effects against prostate cancer (PCa). Interestingly, different prostate cancer cells have different sensitivity to alpha-Vit E or VES treatment. The goal of this study is to determine whether cellular Vit E bioavailability and its transport proteins are important contributing factors. METHODS: alpha-Vit E and its ester form, VES, were used to treat prostate cancer LNCaP, PC3, and DU145 cells, and their growth rates were determined by MTT assay. Cellular levels of Vit E were quantified using HPLC as the index of bioavailability. The expression levels of Vit E transport proteins were determined by real-time PCR. RESULTS: Among these PCa cells, only LNCaP cells were sensitive to 20 microM alpha-Vit E treatment, while both LNCaP and PC3 cells were sensitive to 20 microM VES treatment. Coordinately, cellular levels of alpha-Vit E and VES positively correlated to their inhibitory effects. Further study found expression levels of Vit E transport proteins, including tocopherol associated protein (TAP), scavenger receptor class B type I (SR-BI), alpha-tocopherol transfer protein (TTP), and ATP binding cassette transporter A1 (ABCA1), were different in various PCa cells, which may contribute to cellular Vit E bioavailability. This notion is further supported by the findings that overexpression or knockdown of TTP could coordinately alter cellular alpha-Vit E levels in PCa cells. CONCLUSION: Antiproliferative efficacy of alpha-Vit E is correlated with its cellular bioavailability in PCa cells. Modulating the expression of the efflux or influx transporters could sensitize the growth inhibition efficacy of Vit E in prostate cancer cells.