乳杆菌S层蛋白质的同时使用对病原性Clostridioides difficileS层蛋白质的免疫反应的影响
Matías H Assandri1,2, Mariano Malamud1,3, Natalin J Valeff1,4
1Cátedra de Microbiología, Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP), La Plata, Buenos Aires, Argentina.
Journal of medical microbiology
|September 26, 2025
概括
这项研究表明,来自Lentilactobacillus kefiri (SLP-Lk) 的S层蛋白质可以增强对Clostridioides difficile S层蛋白质 (SLP-Cd) 的免疫反应. SLP-Lk增强了对SLP-Cd的抗体生产,这表明了改进疫苗的潜力.
科学领域:
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
- 疫苗学 疫苗学 疫苗学
背景情况:
- S层蛋白质 (SLPs) 是微生物表面蛋白质,具有免疫调节特性.
- 来自Lentilactobacillus kefiri* (SLP-Lk) 的SLP以前已经显示出增强细胞免疫反应的潜力.
- *Clostridioides difficile* SLP (SLP-Cd) 是针对*C. difficile*感染的疫苗开发的一个潜在目标.
研究的目的:
- 研究SLP-Lk作为辅助剂的潜力,以增强针对SLP-Cd的免疫反应.
- 评估SLP-Lk和SLP-Cd对巨细胞的免疫刺激作用 *in vitro*.
- 评估SLP-Lk对抗SLP-Cd抗体产生的影响 *in vivo*.
主要方法:
- 用SLP-Lk和SLP-Cd刺激巨细胞系 (RAW 264.7),以测量IL-6分泌和细胞因子mRNA表达.
- 小鼠用SLP-Cd接种疫苗,并与SLP-Lk同时使用或不使用.
- 使用ELISA量化了抗SLP-Cd特异性IgG抗体的血清水平.
主要成果:
- 特定的SLP-Lk菌株 (8343和83111) 与SLP-Cd结合时显著增加了巨细胞的IL-6分泌.
- 单独SLP-Lk并没有诱导IL-6的分泌,而是强化了对SLP-Cd的反应.
- 同时使用SLP-Lk 83111与SLP-Cd显著增加了小鼠对SLP-Cd的血清IgG抗体水平.
结论:
- SLP-Lk,特别是83111菌株,作为一种有效的辅助剂,增强了对SLP-Cd的免疫反应.
- 辅助作用与增强的抗原呈现细胞激活和增加的特定抗体产生有关.
- 需要进一步的研究来探索反SLP-Cd抗体在保护*C. difficile*感染中的作用.
相关概念视频
Defense Against Bacterial Pathogens
2.6K
The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
2.6K
Drugs for Treatment of Constipation-Predominant IBS
664
Pharmacological therapies for IBS-C are designed to alleviate abdominal discomfort and enhance bowel function. In patients with IBS-C, fiber supplements may help soften stools and decrease straining, but may also lead to increased gas production and bloating. Osmotic laxatives like milk of magnesia are frequently used to soften stools and increase stool frequency in IBS-C patients. In addition, two drugs approved for use in severe IBS-C adult cases are linaclotide (Linzess) and lubiprostone...
664
Surface Membrane Barriers
2.5K
The skin and mucous membranes serve as the primary line of defense against pathogens by providing both physical and chemical protection. These barriers are essential in preventing the entry and establishment of microbes, thereby maintaining the integrity of the host.
The outer layer of the skin, the epidermis, is a robust barrier comprising layers of closely packed keratinized cells. This dense arrangement prevents microbes from penetrating the body. The periodic shedding of epidermal cells...
The outer layer of the skin, the epidermis, is a robust barrier comprising layers of closely packed keratinized cells. This dense arrangement prevents microbes from penetrating the body. The periodic shedding of epidermal cells...
2.5K
Combined Effects of Drugs: Synergism
6.7K
Synergism is a useful mechanism where combining two or more drugs is more effective than each constituent used alone. Such combinations are also called supra-additive interactions. The drugs collectively enhance the final therapeutic effect by acting on different targets. Another advantage is that the low dose of each constituent drug is sufficient to achieve the desired effect. This helps reduce the duration of therapy and lower the adverse effects of these drugs.
Such synergistic combinations...
Such synergistic combinations...
6.7K


