关键肠道原生动物病原体的细胞外氨基蛋白酶 - 与毒性和致病性相关的病原体因子
Raúl Argüello-García1, Julio César Carrero2, M Guadalupe Ortega-Pierres1
1Departamento de Genética y Biología Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, México City 07360, Mexico.
International journal of molecular sciences
|August 26, 2023
概括
肠道寄生虫如Giardia和Entamoeba会导致严重的腹. 它们分泌的囊蛋白酶 (CPs) 损害宿主细胞和免疫防御,为治疗这些疾病提供了潜在的药物标.
科学领域:
- 寄生虫学的寄生虫学
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- 肠道前列腺寄生虫 (Giardia,Entamoeba,Cryptosporidium,Blastocystis) 在全球造成严重的健康负担,导致严重的腹和炎症.
- 这些病原体破坏了表皮屏障功能,增加了肠道的透性,并诱导了肠细胞的亡,导致宿主生理和免疫疾病.
- 分泌的寄生虫分子,特别是囊蛋白酶 (CPs),充当毒性因子,损害宿主组织并调节免疫反应.
研究的目的:
- 研究四种主要肠道原生体寄生虫中的囊蛋白酶 (CPs) 作为潜在的治疗点的作用.
- 突出CPs有助于寄生虫毒性和宿主组织损伤的机制.
- 审查CP抑制剂在治疗寄生性肠道疾病中的潜力.
主要方法:
- 从Giardia,Entamoeba,Cryptosporidium和Blastocystis中特征化的囊蛋白酶的文献综述和分析.
- 检查已知的功能和分泌CP的基质,包括它们对宿主细胞和免疫分子的影响.
- 在临床前模型中对CP抑制剂疗效的实验数据的评估.
主要成果:
- 来自Giardia和Entamoeba的CP降解了关键宿主蛋白质,如粘素和小素,破坏细胞间结,诱导细胞亡,并降低免疫组件.
- 虽然Cryptosporidium具有多个CP,但只有Cryptopains 4和5被建议分泌.
- 胚囊细胞分泌一种由豆类素激活的CP (Blastopain-1),它损害了上皮质的完整性和肠细胞的存活.
结论:
- 分泌的氨酸蛋白酶是肠道前列腺寄生虫的关键毒性因素,有助于疾病的发病.
- 在降解宿主组织和免疫因素中,CP的特征功能强调了它们在寄生虫感染中的重要性.
- 抗抑郁药物代表着有前途的新型药物标,早期研究在实验模型中显示了像乙烯基硫和艾利这样的抑制剂的有效性.
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