JEADV:89岁患者接种SARS-CoV-19BNT162b2疫苗后发生寻常型天疱疮

2022-01-28 医路坦克 MedSci原创

寻常型天疱疮(PV)是一种与桥粒蛋白(DSG)-3和DSG-1.1自身抗体相关的严重自身免疫性起疱性皮肤病。该文描述了SARS-CoV-19疫苗接种后出现PV的一例病例。

寻常型天疱疮(PV)是一种与桥粒蛋白(DSG)-3和DSG-1.1自身抗体相关的严重自身免疫性起疱性皮肤病。在中欧,估计PV的发病率约为每年每百万居民1例。虽然几种药物可能引发PV,但将PV与抗病毒疫苗(包括流感、乙型肝炎或破伤风)联系起来的证据有限。我们描述了SARS-CoV-19疫苗接种后PV的发病病例。

患者,89岁,全身状况良好,出现疼痛的口腔皮损并伴有皮肤水泡。第一个症状出现在第二针mRNABNT162b2疫苗接种1个月后。在全身麻醉下进行泌尿外科手术后病情恶化。此外,接种疫苗还会导致轻微的暂时性流感样症状。患者因疑似水痘带状疱疹病毒感染而接受治疗,但没有好转。检查发现口腔黏膜、腭部和牙龈有糜烂性病变,左臂和躯干有松弛的水泡、糜烂和结皮病变(图1)病例有图的话最好把图片加进来。活检标本的光镜检查显示基底部以上棘层松解的水泡。直接免疫荧光显微镜研究显示表皮中有细胞表面结合的免疫球蛋白IgG。ELISA法检测患者血清抗Dsg-3抗体(200U/mL;正常人<7U/mL)和抗Dsg-1抗体(140.5 U/mL;<14U/mL)。第二次免疫2个月后,仍有抗SARS-CoV-2S1受体结合区的IgG抗体(75.6AU/mL;<12.0AU/mL),说明免疫效果良好。患者接受了利妥昔单抗和口服泼尼松治疗,在10周内完全控制了疾病活动。

在SARS-CoV-2大流行期间的大规模疫苗接种活动表明,基于信使核糖核酸的新冠肺炎疫苗具有高保护率,显著减少死亡和并发症。这些疫苗有不同的副作用,几乎总是不严重的。然而,越来越多的数据表明,SARS-COV-2疫苗很少引起自身免疫性疾病的发作或新的发展,包括血液学、神经系统和风湿性疾病。此外,也有传闻称接种疫苗后出现自身免疫性大疱性皮肤病。一份报告描述了5名大疱性类天疱疮和PV患者在2周内表现出疾病发作的情况。大多数PV患者确诊时年龄在40-60岁。在瑞士队列中,天疱疮患者的平均年龄为62.5岁。然而,在我们的患者中,接种新冠肺炎疫苗后PV的发生可能只是巧合。第一例可能与新冠肺炎疫苗接种有关的PV发生在第一次接种BNT162b2mRNA疫苗后5天,第二次接种后病情恶化。在后一例中,由于PV发生与第一次接种之间的间隔非常短,而PV的病理生理如此复杂,很可能患者在第一次接种后已经出现了无症状的PV形式。

这些自身免疫现象背后的机制尚不清楚。MRNA疫苗似乎能够激活Toll样受体和胞浆炎性小体成分。此外,疫苗产生的Spike蛋白可能通过分子模拟引发与人体组织的免疫交叉反应而诱导自身免疫。遗传易感性和旁观者效应可能有利于这种失调。BNT162b2已被证明促进体液和细胞免疫反应,改变Th谱,增加IFN-c,IL-2,CD4和CD8细胞的产生。

由于接种疫苗是克服新冠肺炎大流行的关键公共卫生措施,罕见的自身免疫反应不应阻碍自身免疫性疾病患者接种疫苗。

文献来源:

Knechtl G,  Seyed Jafari SM,  Berger T, Development of pemphigus vulgaris following mRNA SARS-CoV-19 BNT162b2 vaccination in an 89-year-old patient.J Eur Acad Dermatol Venereol 2021 Dec 12;

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    2022-03-13 hukaixun
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    2022-04-24 cenghis
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    2022-01-29 小刀医生

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罗氏(Roche)发布III期研究PEMPHIX的数据,该研究评估了在中度至重度寻常型天疱疮的成年患者中,美罗华(利妥昔单抗)与霉酚酸酯(MMF)相比的药效和安全性。该研究在第52周达到了其主要终点,并证明Rituxan优于MMF,接受利妥昔单抗治疗的患者中40.3%无需使用类固醇即可达到持续完全缓解(CR)16周或更长时间。 利妥昔单抗在所有次要终点的统计学上也都有利,例如较低的口服糖