JCI:表皮生长因子可以抑制结肠炎相关癌症

2012-07-27 shootingstar98 丁香园

表皮生长因子 (EGF) 是一种能正常调节肠道愈合的蛋白质。但是应用表皮生长因子的生物学疗法,有增加肿瘤形成的风险。基于此,来自Saban研究所附属洛杉矶儿童医院的Philip Dubé博士和Brent Polk博士最近研究发现:表皮生长因子在临床前期模型中能促进愈合和提供强大的抗炎效应,从而达到阻碍炎症诱发性癌症的发生。Brent Polk博士认为:“有效治疗炎症性肠病的最大障碍源于我们不明其病

表皮生长因子 (EGF) 是一种能正常调节肠道愈合的蛋白质。但是应用表皮生长因子的生物学疗法,有增加肿瘤形成的风险。基于此,来自Saban研究所附属洛杉矶儿童医院的Philip Dubé博士和Brent Polk博士最近研究发现:表皮生长因子在临床前期模型中能促进愈合和提供强大的抗炎效应,从而达到阻碍炎症诱发性癌症的发生。

Brent Polk博士认为:“有效治疗炎症性肠病的最大障碍源于我们不明其病因,不知道如何阻断炎症过程和各种治疗后的长期副作用”。作为SabanSaban研究所的所长和南加州大学Keck医学院儿科和生物化学与分子生物学教授,他指出:“有一种治疗方案很吸引人,即利用人体的自然愈合过程,诱导愈合和扰乱炎症反应。"

克罗恩病和溃疡性结肠炎,统称为炎症性肠病(IBD),是肠道炎症引起的慢性衰弱性疾病。迄今为止,此类疾病已经影响多达 140 万的美国人。如许多其他慢性疾病,炎症性肠病的发病率在西方发达国家中每年递增。症状包括持续腹泻、出血、腹痛、疲劳和体重下降。炎症性肠病引起的长期炎症可显著增加癌症的发病风险。

表皮生长因子是一种能调节肠道愈合的蛋白质。一项2003年发表的临床试验表明,表皮生长因子治疗溃疡性结肠炎患者极为有效。然而由于表皮生长因子一直与肿瘤发生发展相关联,这种治疗方案受到了强烈的质疑。所以虽然表皮生长因子可促进小肠的愈合,作为一种治疗药物有着巨大的潜力,但研究者必须澄清任何相关的癌症风险。

为了确定表皮生长因子与肿瘤的发展之间的关系,研究人员封闭了表皮生长因子以期抑制结肠肿瘤的发生发展。出人意料的是,他们发现灭活表皮生长因子反而造成日益严重的结肠炎,从而大大增加了结肠肿瘤生成的风险。

在顶尖科研杂志《临床调查研究》发表的一篇论文 (2012 年7月9日) 中,研究人员发现:表皮生长因子促进愈合,具有强大的抗炎特性;而结合这些功效实质上阻止了炎症引起的癌症,而不是之前所推断的促进肿瘤生成的作用。

作为这篇论文的第一作者,Dubé博士认为:“由于当前药品和炎症性肠病的外科治疗可引起诸多衰弱的副作用,这些新治疗方案的出现非常必要;而基于人体的自然愈合系统,我们相信我们可以开发治疗炎症性肠病的新策略。这些治疗方案不仅非常有效,最重要的是,它们非常安全"。

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