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生物制剂tildrakizumab:牛皮癣“克星”

2017-06-07 medicalxpress medicalxpress

慢性斑块性银屑病的症状为皮肤上出现红色的斑块,头皮,手肘和膝盖出现鳞状皮肤。慢性斑块性银屑病通常出现在青春期或中年,需要终生服药。1990年代之前,医生对重度牛皮癣患者几乎束手无策,多达四分之一的牛皮癣患者症状发展到全身皮肤的10到100%不等。如今,两个三期试验表明,名为tildrakizumab的生物药物对严重慢性斑块性银屑病患者有良好的疗效。完整的医学报告发表于在《柳叶刀》杂志上,这



慢性斑块性银屑病的症状为皮肤上出现红色的斑块,头皮,手肘和膝盖出现鳞状皮肤。慢性斑块性银屑病通常出现在青春期或中年,需要终生服药。1990年代之前,医生对重度牛皮癣患者几乎束手无策,多达四分之一的牛皮癣患者症状发展到全身皮肤的10到100%不等。

如今,两个三期试验表明,名为tildrakizumab的生物药物对严重慢性斑块性银屑病患者有良好的疗效。完整的医学报告发表于在《柳叶刀》杂志上,这一研究的问世代表着皮肤疾病领域的一大进步。

研究人员表示:“在过去的十五年里,我们在治疗重度牛皮癣领域已经取得了很大的进展,在此次试验中,我们测试了这种全新,靶向特定炎症通路的方法是否可以用来治疗牛皮癣,试验结果是令人兴奋的。”

目标特定通路的抗体与常规药物的作用机制不同,这种名为tildrakizumab的新药,一般被称为生物制剂,或者短期生物制剂,生物制剂就像抗体一样,基于身体自身的分子用来抵抗和治疗疾病。

在两种独立的试验中,研究人员随机将参与者分组,用来测试生物制剂对于中重度牛皮癣患者的作用,参与者共计1800名,遍及全球,他们分别来自奥地利,澳大利亚,比利时,加拿大,捷克共和国,丹麦,法国,德国,匈牙利,以色列,意大利,日本,荷兰,波兰,英国和美国。病人被随机分为三组,一组接受200毫克tildrakizumab,第二组接受100毫克,第三组则使用安慰剂代替。

在开始研究之前,患者身体的牛皮癣覆盖率平均达到30%,在12周的治疗之后,第一组参与者中,65%的患者皮肤出现明显好转;第二组参与者中,75%的参与者标准银屑病面积严重程度指数(PASI)下降;而使用安慰剂的第三组参与者只有10%的人有改善。

研究人员表示:“在这里,虽然我们进一步改善了牛皮癣治疗的进展,为期12周的试验似乎还不足以让我们给出确切的定论。我们还需要持续长期的试验来观察病患的进一步反应。”

在过去的15年里,研究人员确定了与牛皮癣串通一气的免疫系统的组件,那就是称为白细胞介素的分子,它是炎症和过敏的关键所在。有了这些新知识,科学家可以利用人体自然产生的分子(如抗体)来抑制白细胞介素,从而更好地管理牛皮癣。

第一代生物制剂约在15年前问世,通过对它的使用,牛皮癣的临床治疗效果大大改善,但是,由于白细胞介素参与了许多生物过程,因此抑制他们可能带来严重的副作用,包括感染或其他不寻常的免疫系统障碍。

通过结合基础研究临床观察和流行病学,研究人员发现了白介素与银屑病究竟在哪些方面有关系,更有针对性的抵抗白介素,减少不必要的副作用,通过不断地试验,他们发现tildrakizumab在大大提高牛皮癣治疗效果的同时,副作用最小。(生物谷Bioon.com)

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    2018-04-08 snf701207
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    2017-12-18 docwu2019
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