性二态驱动的差异在临床前的疫苗模型中被克服,用于对抗Trypanosoma cruzi
Camila Bulfoni Balbi1, Maria Florencia Pacini1, Brenda Dinatale1
1Instituto de Inmunología Clínica y Experimental de Rosario (IDICER-CONICET), Facultad de Ciencias Médicas, Universidad Nacional de Rosario, Rosario, Argentina.
Frontiers in immunology
|July 11, 2025
概括
使用c-di-AMP (A) 的Trypanosoma cruzi trans-sialidase片段 (TS) 的新型鼻腔疫苗显示了对查加斯病预防的希望. 它有效地保护雄性和雌性小鼠,克服免疫反应和疾病严重程度的基于性别的差异.
科学领域:
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
- 寄生虫学的寄生虫学
背景情况:
- 查加斯病是由*Trypanosoma cruzi* (*Tc*) 引起的,目前缺乏预防性疫苗.
- 查加斯病重症中的性二态化需要包括性别在内的疫苗研究.
- 实验性疫苗显示出潜力,但需要进一步开发用于人类.
研究的目的:
- 在雄性和雌性小鼠中评估与c-di-AMP (A) 配制的复合*Tc*衍生*trans*-sialidase (TS) 疫苗的免疫性和疗效.
- 为了研究性别和丸激素对疫苗反应的影响,使用淋巴切除和假手术的男性.
- 评估疫苗在免疫反应中克服性变态的能力,以及对口腔*Tc*感染的保护.
主要方法:
- 对雄性和雌性BALB/c小鼠进行三剂的TS+A疫苗的鼻内注射.
- 评估幽默和细胞免疫反应,包括抗体标位 (IgG2a,IgG1,IgA) 和细胞因子产生 (IL-17,IFN-γ).
- 通过*Tc*的口服挑战评估疫苗的疗效,测量寄生素血症,组织寄生虫负载,临床结果和心肌炎.
主要成果:
- TS+A疫苗接种诱导了性别特异性免疫特征,女性显示 IgG2a,IgG1,IgA,IL-17 和 IFN-γ 的水平较高.
- 男人表现出更大的延迟型过敏和T细胞增殖;淋巴切除术改变了IgG和T细胞的反应.
- 接种TS+A疫苗的两种性别都显示出受控的寄生素血症,降低了寄生虫负担,改善了临床症状,并减轻了心肌炎.
结论:
- 鼻腔TS+A疫苗接种在雄性和雌性小鼠中提供了对*Tc*感染的显著保护.
- 该疫苗有效地克服了免疫反应和疾病结果中现有的性二态.
- 这种鼻入TS+A疫苗代表了人类查加斯病预防的有希望的候选人.
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