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Medium Cartridges

Company: FiberCell Systems
Catalog#: C2011
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Long-term in vitro Culture of Cryptosporidium parvum
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2018-08-05
[Abstract]  Continuous in vitro growth of Cryptosporidium parvum has proved difficult and conventional in vitro culture techniques result in short-term (2-5 days) growth of the parasite resulting in thin-walled oocysts that fail to propagate using in vitro cultures, and do not produce an active infection using immunosuppressed or immunodeficient mouse models (Arrowood, 2002). Here we describe the use of hollow fiber bioreactors (HFB) that simulate in vivo conditions by providing oxygen and nutrients to host intestinal cells from the basal surface and permit the establishment of a low redox, high nutrient environment on the apical surface. When inoculated with 105 C. parvum (Iowa isolate) oocysts the bioreactor produced 108 ... [摘要]  Cryptosporidium parvum 的连续体外生长已证明是困难的,并且常规体外培养技术导致短期(2-5天)生长寄生虫导致薄壁卵囊不能使用体外培养物繁殖,并且不使用免疫抑制或免疫缺陷小鼠模型产生活跃感染(Arrowood,2002)。在这里,我们描述了中空纤维生物反应器(HFB)的使用,通过提供氧气和营养物质从基础表面宿主肠细胞模拟体内条件,并允许建立低氧化还原,高营养环境顶面。当接种10 5 C时。 parvum (爱荷华州分离物)卵囊生物反应器在14天后每ml产生10个 8 卵囊(20ml额外毛细血管体积),并保持2年以上。使用TCR-α免疫缺陷小鼠模型的体内感染性研究显示,在6,12和18个月时从生物反应器产生的卵囊与用于启动培养的亲本Iowa分离物无法区分。 HFB产生的卵囊具有与亲本爱荷华分离物类似的百分比分析。

【背景】 Cryptosporidium parvum 是人和其他哺乳动物肠道的细胞内专性寄生虫,导致急性腹泻。该疾病在免疫功能正常的个体中是自限性的,然而,在免疫功能低下的成人和幼儿中,该疾病可能危及生命(Kotloff,2017)。它是经济资源低的国家中三种被诊断出的儿童肠道疾病之一(Kotloff et al。,2013; Sow et ...

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