Department of Chemical Engineering, Virginia Tech, Blacksburg, Virginia 24061, United States.
College of Veterinary Medicine, Long Island University, Brookville, New York 11548, United States.
ACS Infect Dis. 2023 Jun 9;9(6):1168-1179. doi: 10.1021/acsinfecdis.2c00618. Epub 2023 May 31.
Bovine respiratory disease (BRD) is a multifactorial condition where different genera of bacteria, such as , , , and , and viruses, like bovine respiratory syncytial virus, bovine viral diarrhea virus, and bovine herpes virus-1, infect the lower respiratory tract of cattle. These pathogens can co-infect cells in the respiratory system, thereby making specific treatment very difficult. Currently, the most common models for studying BRD include a submerged tissue culture (STC), where monolayers of epithelial cells are typically covered either in cellular or spent biofilm culture medium. Another model is an air-liquid interface (ALI), where epithelial cells are exposed on their apical side and allowed to differentiate. However, limited work has been reported on the study of three-dimensional (3D) bovine models that incorporate multiple cell types to represent the architecture of the respiratory tract. The roles of different defense mechanisms in an infected bovine respiratory system, such as mucin production, tight junction barriers, and the production of antimicrobial peptides in cultures require further investigation in order to provide a comprehensive understanding of the disease pathogenesis. In this report, we describe the different aspects of BRD, including the most implicated pathogens and the respiratory tract, which are important to incorporate in disease models assembled . Although current advancements of bovine respiratory cultures have led to knowledge of the disease, 3D multicellular organoids that better recapitulate the environment exhibit potential for future investigations.
牛呼吸道疾病(BRD)是一种多因素疾病,多种细菌属,如 、 、 、 和病毒,如牛呼吸道合胞体病毒、牛病毒性腹泻病毒和牛疱疹病毒 1,感染牛的下呼吸道。这些病原体可以共同感染呼吸系统中的细胞,从而使特定的治疗变得非常困难。目前,研究 BRD 的最常见模型包括浸没组织培养(STC),其中上皮细胞的单层通常覆盖细胞或用过的生物膜培养基。另一个模型是气液界面(ALI),其中上皮细胞在其顶端暴露并允许分化。然而,据报道,关于纳入多种细胞类型以代表呼吸道结构的三维(3D)牛模型的研究很少。在感染的牛呼吸系统中,不同防御机制的作用,如粘蛋白产生、紧密连接屏障和抗菌肽的产生,需要进一步研究,以便全面了解疾病发病机制。在本报告中,我们描述了 BRD 的不同方面,包括最相关的病原体和呼吸道,这些都是组装疾病模型时需要纳入的重要因素。尽管目前牛呼吸道培养的进展已经使人们对该疾病有了更多的了解,但更好地再现 3D 多细胞类器官环境的 3D 多细胞类器官具有未来研究的潜力。