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在HCMV感染中,特定的T细胞分泌IFN-γ

Hanying Liang¹, Shengnan Gong¹, Genyong Gui¹

¹State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310003, Zhejiang, PR China.

|March 27, 2024

概括

在异性造血干细胞移植 (allo-HSCT) 接受者中,高病毒载量表明人细胞巨血病毒 (HCMV) 感染的风险更高. 早期检测HCMV-DNA和监测干扰素- (IFN-γ) 水平可以帮助防止重新激活.

科学领域:

免疫学免疫学免疫学
移植医学移植医学
病毒学病毒学

背景情况:

全源性造血干细胞移植 (allo-HSCT) 接受者面临人类细胞巨血病毒 (HCMV) 感染的重大风险.
对于有效的治疗策略来说,区分高风险的患者对HCMV再激活至关重要.

研究的目的:

调查HCMV病毒载量 (VL) 与免疫反应之间的相关性,特别是T细胞的干扰素- (IFN-γ) 生产,在Allo-HSCT接受者中.
识别移植后晚期HCMV感染高风险的早期指标.

主要方法:

从60名HLA-A*02 allo-HSCT接受者的移植前和移植后收集HCMV-DNA.
使用酶相关免疫位点测定 (ELISPOT) 评估HCMV特异性T细胞释放的IFN-γ.
分析的病毒载量和IFN-γ斑形成细胞 (SFC) 数量与感染状态和时间相关.

主要成果:

在HCMV持久感染组中观察到较高的中位病毒载荷 (VL),与非持久感染组相比 (p=0.002).
在高VL组中,晚期感染率明显高 (p=0.014).
在未感染群体和持久感染群体中,IFN-γ SFC计数中位数较高 (p=0.001),SFC计数与VLs之间有负相关性 (r=-0.397,p=0.002).
高免疫应答组显示晚期感染率降低 (p=0.049).

结论:

早期高VL的Allo-HSCT接受者有晚期HCMV感染的风险较高.
具有足够的IFN-γ由HCMV特异性T细胞分泌可能会防止HCMV的重新激活.
早期的VL监测和免疫反应评估对于管理alo-HSCT中的HCMV风险至关重要.

关键词:

全基性造血干细胞移植血型造血干细胞移植在HLA-A*02中.人类细胞巨型病毒DNADNA 干扰素-γγ 是一种干扰素.

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