牛乳腺菌作为针对牛乳腺炎疫苗接种的平台
Célya Danzelle1, Patricia Cunha1, Pablo Gomes Noleto1
1ISP, INRAE, Université de Tours, UMR1282, 37380 Nouzilly, France.
Vaccine
|September 26, 2024
概括
这项研究探讨了酵母作为牛乳腺炎的疫苗平台,发现Saccharomyces cerevisiae是安全的,但需要抗原特异性免疫反应策略才能有效的乳腺炎疫苗.
科学领域:
- 兽医免疫学 兽医免疫学
- 微生物疫苗平台 微生物疫苗平台
- 乳牛的健康状况 乳牛的健康状况
背景情况:
- 乳腺炎对乳制品行业构成重大经济威胁.
- 目前的乳腺炎疫苗由于细胞介导免疫诱导不良,有效性有限.
- 基于酵母的抗原载体显示出诱导T细胞反应的潜力,克服了传统疫苗的抗体偏差限制.
研究的目的:
- 评估Saccharomyces cerevisiae作为牛乳腺炎的安全有效的疫苗平台.
- 为了评估S. cerevisiae在不同的施用途径后的免疫性.
- 为了研究由酵母为基础的针对乳腺炎的疫苗接种诱导的细胞介导免疫反应.
主要方法:
- 采用了体外,体外和体内实验方法.
- 通过乳牛的肌肉内和乳内免疫,评估了S. cerevisiae的安全性.
- 测量了干扰素- (IFNγ) 和干扰素-17 (IL-17) 水平,以评估细胞介导免疫力.
主要成果:
- 发现Saccharomyces cerevisiae对于乳牛的肌肉内和乳腺内疫苗接种都是安全的.
- 用S. cerevisiae接种疫苗导致IFNγ和IL-17反应显著增加.
- 免疫反应主要针对酵母平台本身,而不是预期的疫苗抗原.
结论:
- 细菌为牛乳腺炎疫苗开发提供了一个安全的平台.
- 在S. cerevisiae抗原的免疫主导性需要缓解策略.
- 需要进一步的研究来开发成功的乳腺炎疫苗候选人,使用这种酵母平台通过增强抗原特异性免疫力来开发.
相关概念视频
01:29Microbes in Food Production
Microbial fermentation is central to food biotechnology, enhancing flavor, texture, preservation, and stability. Fermentative microorganisms metabolize carbohydrates into organic acids, alcohols, and other metabolites that inhibit spoilage organisms and improve digestibility while contributing distinctive sensory qualities.In baking, amylases naturally present in flour hydrolyze starch into monosaccharides such as glucose, which Saccharomyces cerevisiae ferments anaerobically. Through...
01:25Microbes in Beverage Production
Alcoholic beverages such as wine, beer, and spirits are the products of microbial fermentation processes that transform simple sugars into ethanol and a wide array of complex flavor compounds. These transformations rely on the metabolic activities of specific yeasts and bacteria, which are selected and controlled to yield the desired beverage characteristics.Wine Fermentation and MaturationWine production begins with the crushing of grapes to release juice and pulp, forming a must that is...
01:27Microbes in the Production of Fermented Foods
Lactic acid bacteria (LAB) and molds are instrumental in fermenting plant-based foods to enhance preservation and ensure year-round availability. These microbial processes convert plant carbohydrates into organic acids and other metabolites that inhibit spoilage organisms and contribute to the sensory qualities of the final product.In sauerkraut production, cabbage goes through a microbial succession that starts with cocci such as Leuconostoc mesenteroides. These microbes begin fermentation by...
01:22Bioreactor Controls-III
Strain improvement is a foundational strategy in industrial microbiology aimed at maximizing microbial productivity, particularly because natural isolates typically yield commercially valuable products in very low concentrations. Although optimizing the culture medium and environmental conditions can improve yields, these adjustments are inherently limited by the organism’s genetic potential. As a result, the focus shifts toward genetic modifications to enhance biosynthetic capacity. The...
01:23Vaccine Production
Vaccine production involves a sequence of upstream and downstream processes to generate a safe and effective immunological product. It begins with cultivating microorganisms, such as viruses or bacteria, to obtain antigenic material. For viral vaccines, mammalian host cells are grown in bioreactors and subsequently infected with the target virus. The virus replicates within the host cells, which are lysed to release viral particles. This lysate is then clarified through filtration or...
01:25Clinical Significance of Antibiotic Resistance
Methicillin-resistant Staphylococcus aureus (MRSA) presents a critical public health threat, arising from its capacity to resist β-lactam antibiotics due to acquisition of the mecA gene within the staphylococcal cassette chromosome mec (SCCmec). This gene encodes penicillin-binding protein 2a (PBP2a), which impairs binding efficacy of methicillin and other β-lactams. MRSA has evolved into distinct clonal lineages impacting humans and animals alike, reinforcing its significance within the One...