目的:探讨子宫内膜癌肿瘤微环境内IGFBP-3表达与肿瘤-间质相互作用的关系,以及IGFBP-3表达对子宫内膜癌侵袭能力的影响。方法:免疫组化法检测子宫内膜癌、正常子宫内膜组织中IGFBP-3的表达情况。肿瘤相关成纤维细胞(CAF)、正常内膜成纤...目的:探讨子宫内膜癌肿瘤微环境内IGFBP-3表达与肿瘤-间质相互作用的关系,以及IGFBP-3表达对子宫内膜癌侵袭能力的影响。方法:免疫组化法检测子宫内膜癌、正常子宫内膜组织中IGFBP-3的表达情况。肿瘤相关成纤维细胞(CAF)、正常内膜成纤维细胞(NF)与子宫内膜癌Ishikawa细胞在Transwell小室内共培养,RT-PCR、ELISA法检测IGFBP-3表达水平的改变。Transwell侵袭实验评估IGFBP-3表达改变对Ishikawa细胞侵袭能力的影响。结果:子宫内膜癌组织中IGFBP-3表达显著低于正常子宫内膜组织(P<0.01)。CAF、NF与Ishikawa细胞共培养后,两种间质成纤维细胞中IGFBP-3 mRNA表达水平均显著下降(P<0.01);而在Ishikawa细胞,CAF可使其IGFBP-3 mRNA表达显著降低(P<0.01),但NF对其无显著影响(P>0.05)。CAF、NF均能促进Ishikawa细胞的侵袭能力;与单Ishikawa细胞组和NF+Ishikawa共培养组相比,CAF共培养能显著增加Ishikawa细胞的侵袭能力(113.33±8.50 vs 65.17±10.23、75.33±8.21,P<0.01)。而加入外源性重组人IGFBP-3后,能显著抑制CAF的促侵袭作用。结论:子宫内膜癌肿瘤与间质相互作用可导致肿瘤微环境内IGFBP-3表达下降,而肿瘤微环境IGFBP-3表达的改变与子宫内膜癌的生长、侵袭和转移密切相关。展开更多
Objectives Tumor necrosis factor-α （TNF-α） may play an important role in host＇s immune response to mycobacterium tuberculosis （M. tuberculosis） infection. This study was to investigate the association of TNF-α...Objectives Tumor necrosis factor-α （TNF-α） may play an important role in host＇s immune response to mycobacterium tuberculosis （M. tuberculosis） infection. This study was to investigate the association of TNF-α gene polymorphism with pulmonary tuberculosis （TB） among patients with coal worker＇s pneumoconiosis （CWP）. Methods A case-control study was conducted in 113 patients with confirmed CWP complicated with pulmonary TB and 113 non-TB controls with CWP. They were matched in gender, age, job, and stage of pneumoconiosis. All participants were interviewed with questionnaires and their blood specimens were collected for genetic determination with informed consent. The TNF-α gene polymorphism was determined with polymerase chain reaction of restriction fragment length polymorphism （PCR-RFLP）. Frequency of genotypes was assessed for Hardy-Weinberg equilibrium by chi-square test or Fisher＇s exact probability. Factors influencing the association of individual susceptibility with pulmonary TB were evaluated with logistic regression analysis. Gene-environment interaction was evaluated by a multiplieative model with combined OR. All data were analyzed using SAS version 8.2 software. Results No significant difference in frequency of the TNF-α-308 genotype was found between CWP complicated with pulmonary TB and non-TB controls （2,2=5.44, P=-0.07）. But difference in frequency of the TNF-α-308 A allele was identified between them （2,2-5.14, P=0.02）. No significant difference in frequencies of the TNF-α-238 genotype and allele （P=0.23 and P=0.09, respectively） was found between cases and controls either, with combined （GG and AA） OR of 3.96 （95% confidence interval of 1.30-12.09） at the -308 locus of the TNF-α gene, as compared to combination of the TNF-α-238 GG and TNF-α-308 GG genotypes. Multivariate-adjusted odds ratio of the TNF-α-238 GG and TNF-α-308 GA genotypes was 1.98 （95% CI of 1.06-3.71） for risk for pulmonary TB in patients with CWP. There was a synergic interaction between the TNF-a-308 GG genotype and body mass index （OR=4.92）, as well as an interaction between the TNF-α-308 GG genotype and history of BCG immunization or history of TB exposure. And, the interaction of the TNF-α-238 GG genotype and history of BCG immunization or TB exposure with risk for pulmonary TB in them was also indicated. Conclusions TNF-α-308 A allele is associated with an elevated risk for pulmonary TB, whereas TNF-α-238 A allele was otherwise.展开更多
Progression of cancer is often associated with interactions between cancer cells and extracellular matrix(ECM) surrounding them. Increasing evidence has suggested that accumulation of hyaluronan(HA), a major component...Progression of cancer is often associated with interactions between cancer cells and extracellular matrix(ECM) surrounding them. Increasing evidence has suggested that accumulation of hyaluronan(HA), a major component of ECM, provides a favorable microenvironment for cancer progression. Pancreatic ductal adenocarcinoma(PDAC) is characterized typically by a dense desmoplastic stroma with a large amount of HA, making this molecule as an attractive target for therapy. Several studies have shown efficacy of inhibitors of HA synthesis or signaling for the treatment of PDAC. Recent studies have also demonstrated substantial improvements in the effects of chemotherapy by a targeted depletion of stromal HA in PDAC using an enzymatic agent. Thus, targeting HA has been recognized as a promising therapeutic strategy to treat this highly aggressive neoplasm. In this review article, we summarize our current understanding of the role of HA in the progression of PDAC and discuss possible therapeutic approaches targeting HA.展开更多
文摘目的:探讨子宫内膜癌肿瘤微环境内IGFBP-3表达与肿瘤-间质相互作用的关系,以及IGFBP-3表达对子宫内膜癌侵袭能力的影响。方法:免疫组化法检测子宫内膜癌、正常子宫内膜组织中IGFBP-3的表达情况。肿瘤相关成纤维细胞(CAF)、正常内膜成纤维细胞(NF)与子宫内膜癌Ishikawa细胞在Transwell小室内共培养,RT-PCR、ELISA法检测IGFBP-3表达水平的改变。Transwell侵袭实验评估IGFBP-3表达改变对Ishikawa细胞侵袭能力的影响。结果:子宫内膜癌组织中IGFBP-3表达显著低于正常子宫内膜组织(P<0.01)。CAF、NF与Ishikawa细胞共培养后,两种间质成纤维细胞中IGFBP-3 mRNA表达水平均显著下降(P<0.01);而在Ishikawa细胞,CAF可使其IGFBP-3 mRNA表达显著降低(P<0.01),但NF对其无显著影响(P>0.05)。CAF、NF均能促进Ishikawa细胞的侵袭能力;与单Ishikawa细胞组和NF+Ishikawa共培养组相比,CAF共培养能显著增加Ishikawa细胞的侵袭能力(113.33±8.50 vs 65.17±10.23、75.33±8.21,P<0.01)。而加入外源性重组人IGFBP-3后,能显著抑制CAF的促侵袭作用。结论:子宫内膜癌肿瘤与间质相互作用可导致肿瘤微环境内IGFBP-3表达下降,而肿瘤微环境IGFBP-3表达的改变与子宫内膜癌的生长、侵袭和转移密切相关。
基金supported by grants from China National Programs for Science and Technology Development (Grant No. 2003BA712A11-24)Scientific Research Fund of North China Coal Medical College (Grant No. 2005-14)
文摘Objectives Tumor necrosis factor-α （TNF-α） may play an important role in host＇s immune response to mycobacterium tuberculosis （M. tuberculosis） infection. This study was to investigate the association of TNF-α gene polymorphism with pulmonary tuberculosis （TB） among patients with coal worker＇s pneumoconiosis （CWP）. Methods A case-control study was conducted in 113 patients with confirmed CWP complicated with pulmonary TB and 113 non-TB controls with CWP. They were matched in gender, age, job, and stage of pneumoconiosis. All participants were interviewed with questionnaires and their blood specimens were collected for genetic determination with informed consent. The TNF-α gene polymorphism was determined with polymerase chain reaction of restriction fragment length polymorphism （PCR-RFLP）. Frequency of genotypes was assessed for Hardy-Weinberg equilibrium by chi-square test or Fisher＇s exact probability. Factors influencing the association of individual susceptibility with pulmonary TB were evaluated with logistic regression analysis. Gene-environment interaction was evaluated by a multiplieative model with combined OR. All data were analyzed using SAS version 8.2 software. Results No significant difference in frequency of the TNF-α-308 genotype was found between CWP complicated with pulmonary TB and non-TB controls （2,2=5.44, P=-0.07）. But difference in frequency of the TNF-α-308 A allele was identified between them （2,2-5.14, P=0.02）. No significant difference in frequencies of the TNF-α-238 genotype and allele （P=0.23 and P=0.09, respectively） was found between cases and controls either, with combined （GG and AA） OR of 3.96 （95% confidence interval of 1.30-12.09） at the -308 locus of the TNF-α gene, as compared to combination of the TNF-α-238 GG and TNF-α-308 GG genotypes. Multivariate-adjusted odds ratio of the TNF-α-238 GG and TNF-α-308 GA genotypes was 1.98 （95% CI of 1.06-3.71） for risk for pulmonary TB in patients with CWP. There was a synergic interaction between the TNF-a-308 GG genotype and body mass index （OR=4.92）, as well as an interaction between the TNF-α-308 GG genotype and history of BCG immunization or history of TB exposure. And, the interaction of the TNF-α-238 GG genotype and history of BCG immunization or TB exposure with risk for pulmonary TB in them was also indicated. Conclusions TNF-α-308 A allele is associated with an elevated risk for pulmonary TB, whereas TNF-α-238 A allele was otherwise.
基金supported in part by a grant-in-aid from the Ministry of Education, Culture, Sports, Science and Technologies of Japan (26462076)
文摘Progression of cancer is often associated with interactions between cancer cells and extracellular matrix(ECM) surrounding them. Increasing evidence has suggested that accumulation of hyaluronan(HA), a major component of ECM, provides a favorable microenvironment for cancer progression. Pancreatic ductal adenocarcinoma(PDAC) is characterized typically by a dense desmoplastic stroma with a large amount of HA, making this molecule as an attractive target for therapy. Several studies have shown efficacy of inhibitors of HA synthesis or signaling for the treatment of PDAC. Recent studies have also demonstrated substantial improvements in the effects of chemotherapy by a targeted depletion of stromal HA in PDAC using an enzymatic agent. Thus, targeting HA has been recognized as a promising therapeutic strategy to treat this highly aggressive neoplasm. In this review article, we summarize our current understanding of the role of HA in the progression of PDAC and discuss possible therapeutic approaches targeting HA.
