3D生物打印的尿导管可以使益生菌在流下持续恢复,并改善活体膀殖民
Anthony J Kyser1, Arielle Greiner1, Victoria Harris1
1Department of Bioengineering, University of Louisville Speed School of Engineering, Louisville, KY, 40292, USA.
Probiotics and antimicrobial proteins
|January 5, 2025
概括
这项研究表明,在导管表面上生物打印的Lactobacillus rhamnosus可以防止病原体的殖民化. 这些益生菌导管证明了可行性和安全性,提供了一种新的策略来对抗导管相关的尿路感染 (CAUTIs).
科学领域:
- 生物材料工程 生物材料工程
- 微生物学 微生物学
- 传染性疾病 传染性疾病
背景情况:
- 导管相关的尿路感染 (CAUTIs) 是一个重要的医疗负担,通常与抗生素耐药性尿路病原体的殖民化有关.
- 目前的预防策略有限,需要新的方法来减少病原体对内置设备的粘附.
- 使用非致病性微生物的细菌干扰为医疗器械提供了一个有前途的预防方法.
研究的目的:
- 为了评估益生菌Lactobacillus rhamnosus在3D生物打印尿导管材料中集成的稳定性和活力.
- 在小鼠模型中评估这些益生菌释放生物打印在预防细菌殖民化的安全性和有效性.
主要方法:
- 用3D生物打印的导管段进行了体外液压流量测试,使用人工尿媒介.
- 乳杆菌rhamnosus恢复,生物膜形成和生物打印的结构完整性被分析后流.
- 在体内研究涉及将生物打印物植入小鼠体内,以评估尿路殖民,益生菌活力和膀组织反应.
主要成果:
- 在模拟尿液流动下,生物打印细分保持了结构完整性和可行的L. rhamnosus恢复长达7天.
- 在生物打印表面上,L. rhamnosus成功地形成了生物膜,抵御了尿流的干扰.
- 在体内,生物印记支持L. rhamnosus活力,殖民和释放,而不会导致超出标准导管之外的重大炎症.
结论:
- 3D生物打印的L. rhamnosus表现出卓越的生存能力,生物膜形成,以及在导管表面的稳定性.
- 生物打印的益生菌导管显示出体内殖民的潜力,也是预防CAUTI的有希望的新策略.
- 这种方法支持开发用于感染控制的先进益生菌释放医疗器械.
相关概念视频
Urinary Tract Infection III: Diagnostic Studies and Interprofessional Care
A healthcare provider can diagnose a urinary tract infection (UTI) through several methods:Medical History and Symptoms: The provider will take a detailed medical history and ask about symptoms such as frequent urination, burning sensation during urination, and lower abdominal pain.Urinalysis: A clean-catch urine sample is collected in a sterile container and tested for the presence of bacteria, white blood cells (leukocytes), nitrites, blood, and protein. The presence of leukocytes and...
Microbiota of the Urogenital Tract
The human urogenital system, once thought to be sterile in healthy individuals, is now recognized as a complex microbial habitat. Advancements in molecular sequencing techniques have revealed that even in healthy adults, the kidneys and bladder harbor microbial populations similar to those found in the distal urethra, albeit in much lower abundance. These resident microorganisms, while generally innocuous, can become opportunistic pathogens under conditions that alter the urogenital...


