皮下注射精蛋白生物合成人胰岛素引起注射部位银屑病

2018-01-25 佚名 CSDCMA皮科时讯论坛

患者女,52岁

【一般资料】

患者女,52岁

【主诉】

因腹部红斑、鳞屑、瘙痒1年就诊。

【既往史】

既往糖尿病史5年

【现病史】

1年前参加某临床实验研究,作为对照组,腹部注射精蛋白生物合成人胰岛素,注射1月后患者发现注射部位出现红斑、瘙痒,无其它不适。未引起重视,亦未停用该药。3个月的临床实验结束后,腹部皮损融合成20×18cm不规则红斑鳞屑性斑片,边界清楚(图1A)。

【体格检查】

体检发现除腹部皮损外,双肘部和臀部也有红斑、鳞屑性皮损。患者诉这些部位的皮损已持续存在5年,稳定无进展。

【辅助检查】

腹部皮损病理回报:符合银屑病病理表现(图1B)。

【初步诊断

患者银屑病诊断明确。

【讨论】

银屑病患者可在注射部位发生银屑病皮损,被称为同形反应,多发生在进展期银屑病患者身上,该患为稳定期银屑病,为何会出现同形反应?是否与精蛋白生物合成人胰岛素注射有关?Dogan等发现进入皮肤内的抗原比外伤更易引起同形反应。该作者认为是因为皮肤细胞免疫对皮内抗原的免疫反应所引起的迟发性变态反应进一步刺激了银屑病同形反应的发生。Fierlbeck等在1名合并2型糖尿病的银屑病关节炎患者身上发现γ干扰素在注射部位引起了银屑病同形反应,而皮下注射胰岛素及安慰剂均未引起。γ干扰素可能扮演了这样的抗原角色。精蛋白生物合成人胰岛素是否也扮演了类似的角色,为了验证我们的假说,我们将精蛋白生物合成人胰岛素15IU,每天2次,注射于患者左侧腹部正常皮肤,共3天,并将同等剂量的安慰剂(注射用水)做为对照注射于患者右侧腹部正常皮肤,并于注射后72小时、第8天、12天、16天、20天观察注射后皮肤变化。精蛋白生物合成人胰岛素首次注射72小时后于注射部位出现了红斑,并在20天后皮损明显加重,然后逐渐消退,安慰剂注射部位无任何变化。我们认为如果持续注射精蛋白生物合成人胰岛素最终会在注射部位引起典型的银屑病皮损。我们的实验验证了是精蛋白生物合成人胰岛素而不是单纯的皮下针刺在注射部位诱导出了该患的银屑病皮损。我们还用该胰岛素制剂做了斑贴实验,结果阴性,说明精蛋白生物合成人胰岛素仅仅接触皮肤还不足以引起该患的银屑病同形反应。Moore等报道了1例胰岛素使用后银屑病皮损加重的病例,该病例与我们报道的病例不同,我们的病例只在注射部位引起银屑病皮损,并未引起患者其它部位银屑病皮损加重,故精蛋白生物合成人胰岛素对该患银屑病无系统性影响。患者腹部新发的银屑病皮损瘙痒明显,且对多种外用药物治疗抵抗,虽最终在起病1年半后被倍他米松软膏治疗消退,但给患者带来了巨大负担。


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    2018-02-11 177200fc66m

    少见.学习了!

    0

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    2018-07-16 baoya
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    2018-01-25 惠映实验室

    学习.谢谢分享.

    0

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