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随着生活方式和饮食结构的改变,肥胖人群在世界范围内广泛增加,与此同时,结直肠癌发病率也急剧升高,人们已经普遍认识到肥胖是结直肠癌发生的重要危险因素。但是,肥胖是否影响结直肠癌预后,各项研究结果却不一致。结直肠癌的筛查、早期诊断(肠镜、影像学检查、结直肠癌肿瘤标记物等)、分期(TNM分期)、治疗策略(内外科综合治疗)的细致改进以及预后标志物的发现及应用已显著的改善了结直肠癌的预后。目前,结直肠癌患者在确诊后,超过65%的患者生存期超过了5年,结直肠癌的预后影响因素中,临床病理学因素最为重要,近年来一些研究发现可以改变预后的因素,包括肥胖、肥胖相关炎症、代谢紊乱,该文就肥胖与结直肠癌预后的关系展开论述。 相似文献
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结直肠癌发生的基因机制研究进展 总被引:1,自引:0,他引:1
结直肠癌是常见的消化道恶性肿瘤,在我国发病呈上升趋势。近十余年,有很多关于结直肠癌相关基因和基因机制的研究报道。随着研究的进展和很多新的相关基因的出现,对结直肠癌的基因机制认识不断完善。本文对结直肠癌的分类、相关基因以及发病机制作简要综述。 相似文献
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结直肠癌侵袭转移机制研究进展 总被引:2,自引:0,他引:2
结直肠癌侵袭转移的机制与很多方面有关,主要包括结直肠癌侵袭转移的相关基因如k-ras、c-met、nm23、c-SRC、HES-6、P107等,肿瘤免疫,肿瘤血管形成,与细胞外基质(ECM)相互作用的相关分子,及一氧化氮等等。本文就目前国内外在这些方面的研究进展作一综述。 相似文献
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腹腔镜下结直肠癌根治术经过近20年的临床应用,取得了比较肯定的临床疗效,而近年来的研究取得了一定的结果,本文拟对目前腹腔镜下结直肠癌的现状和研究进展作一综述。 相似文献
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腹腔镜下结直肠癌根治术经过近20年的临床应用,取得了比较肯定的临床疗效,而近年来的研究取得了一定的结果,本文拟对目前腹腔镜下结直肠癌的现状和研究进展作一综述. 相似文献
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结直肠癌是威胁人类健康的重大疾病之一,随着近年来微生物组学技术的发展,很多研究报道了微生物与结直肠癌发生发展的关系,发现了具核梭杆菌、脆弱拟杆菌等微生物促进结直肠癌发生的分子机制以及短链脂肪酸等细菌代谢产物抑制结直肠癌发生发展的作用。利用结直肠癌患者与健康人群之间的差异微生物,可以建立基于微生物标志物的结直肠癌诊断模型,使结直肠癌的早发现、早诊断成为可能。在结直肠癌的治疗领域,微生物可能成为抑制结直肠癌发生发展的药物靶点,并且能够影响化疗药物的疗效与不良反应。本文以微生物与结直肠癌的关系为切入点,结合近年的相关文献及自身研究,对微生物与结直肠癌的发病机制、早期诊断和治疗的研究进展作一综述。 相似文献
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Jin-chun Cong Xian-wei Dai Ming-yang Shen Jun-jiang Wang Chun-sheng Chen Hong Zhang Lei Qiao 《中国癌症研究》2009,21(2):142-146
Objective: The obesity hormone, leptin, has been found to participate in the development and proliferation of normal and malignant tissues. The aim of this study was to evaluate the role of leptin in human colorectal cancer.Methods: Serum leptin levels were measured via ABC-ELLSA in 30 colorectal cancers and 24 normal controls. Leptin concentration in colorectal cancer was analyzed in terms of selected clinicopathological features and some oncogenes.Results: The mean concentration of leptin was significantly higher for colorectal cancers(3.54±1.46 ng/ml) than normal controls(2.27±0.99 ng/ml), no gender difference was observed in this study. Leptin expression in poorly differentiated tumors was obviously lower than those in moderately and well differentiated tumors. There were no statistically significant correlations between leptin and the serum CEA and CA199 in colorectal cancers (P>0.05), and between leptin and the expressions of K-RAS, P53, APC, DCC genes in tumor tissues (P>0.05).Conclusion: Leptin is overexpressed in human colorectal cancer, which is related to the differentiation degrees of the tumor. There is no correlation between leptin expression and chages of oncogenes in colorectal cancers. 相似文献
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【摘要】白藜芦醇是一种天然的多酚化合物,有预防心血管疾病,预防衰老,抗炎,抗癌等作用。该文总结了近年来白藜芦醇作用于结直肠癌的机制的研究进展,为白藜芦醇的进一步研究提供依据。 相似文献
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人类肠道微生物已越来越受到医学界的广泛关注,人类肠道微生物不仅在人类健康方面,而且在人类疾病的发生和发展方面都有很大的作用。人们不断发现微生物与癌症之间的联系,特别是肠道微生物群和肠道肿瘤之间的联系。宏基因组学作为微生物研究的一种重要研究方法,在微生物与结直肠癌研究中发挥越来越重要的作用。近年来,通过宏基因组学研究肠道微生物菌群的变化为结直肠癌的发生和发展提供了新的见解,并且强调了癌症微生物群中宿主-微生物和微生物间相互作用的重要性。本综述回顾了通过宏基因组学研究肠道微生物与结直肠癌之间的关系,希望为癌症预防、诊断和治疗提供新的机会。 相似文献
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Objective: To evaluate the association between obesity and the risk of colorectal cancer. Methods: 331 patients with rectal cancer and 175 with colon cancer who accepted surgical operation at Beijing Cancer Hospital during 1995 and 2002 were enrolled. Data were collected by reviewing the pathology materials and hospital records. 258 healthy people who accepted health examination at Beijing Cancer Hospital during 2000 and 2002 were also enrolled as control. Data of height, weight and gender at the time of examination were also collected. Obesity was estimated by body mass index (BMI), computed as weight in kilograms divided by height in meters squared (kg/m^2). The degree of obesity was compared between the two groups using BMI≤18.5, 24-27.9 and ≥28 (kg/m^2) as the cut-off points for underweight, overweight and obesity. Associations with obesity were estimated by odds ratios (ORs) and 95% confidence intervals (CIs). All ORs were adjusted for age and sex. Results: Obesity was significantly prevalent in female patients with rectal cancer. All the patients with colon cancer showed lower level of BMI than control subjects. The ORs for rectal cancer rose with increasing BMI in women. Meanwhile, the ORs for colon cancer dropped with increasing BMI in both men and women.Obesity was an independent risk factor for rectal cancer,but not an independent risk factor for colon cancer.Conclusion: Rectal cancer and colon cancer may have different biological behavior. Obese women have relatively high risk for rectal cancer. 相似文献
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Background The past years’ therapy for colorectal cancer has evolved rapidly with the introduction of novel cytotoxic agents such as
irinotecan, capecitabine and oxaliplatin. Further advances have been achieved with the integration of targeted agents such
as bevacizumab, cetuximab and recently, panitumumab. As a result, third-line treatment is now a necessary step in the optimal
treatment of patients with metastatic colorectal cancer (MCRC).
Materials and methods We conducted a literature review of English language publications on third-line therapy for MCRC from January 2000 to April
2007. Data on median overall survival (mOS), median time to progression (mTTP) and response rate were recorded.
Results We found 27 articles and 22 abstracts to fulfil the criteria. Patients who received regimens containing oxaliplatin and infusional
5-fluorouracil (5-FU) demonstrated mTTP up to 7 months and a mOS of 16 months. With irinotecan and 5-FU, mOS around 8 months
were reported and with cetuximab combined with irinotecan, the highest mOS was 9.8 months.
Conclusion Third-line therapy in advanced colorectal cancer may improve mOS for patients with MCRC. Therefore, randomized studies should
be conducted in the future. 相似文献