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相关概念视频

Microbial Interactions: Mutualism01:25

Microbial Interactions: Mutualism

Mutualism is a symbiotic interaction in which all participating organisms benefit. These relationships can be obligate or facultative and are fundamental to ecosystem functions across diverse biological systems.Plant–Fungi MutualismOne well-known example is the association between plant roots and mycorrhizal fungi, such as Rhizophagus species. The fungal hyphae penetrate the root hairs and the epidermis, forming an extensive hyphal network that establishes a symbiotic association. Through this...
Microbial Interactions: Cooperation01:26

Microbial Interactions: Cooperation

Microbial cooperation involves beneficial interactions in which different species work together for individual or mutual advantage. These interactions can profoundly influence ecological dynamics and evolutionary processes, and they are essential to many pathogenic and symbiotic relationships.Nematode–Bacteria CooperationA striking example is the relationship between the Gram-negative bacterium Xenorhabdus nematophila and the parasitic nematode Steinernema carpocapsae. Juvenile nematodes...
Introduction to the Human Microbiota01:22

Introduction to the Human Microbiota

Microorganisms colonize various regions of the human body, including the mouth, nasal passages, throat, stomach, intestines, urogenital tract, and skin. The total number of microbial cells is estimated to range from 10¹³ to 10¹⁴—comparable to, or exceeding, the number of human somatic cells. This host–microbiome relationship has led to the conceptualization of humans as supraorganisms, wherein microbial communities perform vital roles in development, immunity, and disease...
The Oral Microbiota01:27

The Oral Microbiota

The oral microbiome includes a complex ecosystem comprising over 700 microbial species, identified through genomic sequencing and culture-based analyses to date. This community includes a core microbiome, found universally among individuals, and a variable component influenced by environmental factors such as diet, lifestyle, and host genetics. Site-specific conditions, including oxygen gradients, pH levels, and nutrient availability, determine the spatial distribution of these microorganisms...
Development of the Oral Microbiota01:28

Development of the Oral Microbiota

The establishment of the oral microbiome begins before birth, challenging the long-held belief that the fetal oral cavity is sterile. The presence of oral microbes such as Streptococcus and Fusobacterium in amniotic fluid suggests that microbial exposure may occur in utero, potentially through translocation from the maternal oral or gastrointestinal tract. This early colonization primes the neonatal immune system and sets the stage for subsequent microbial succession. Maternal health,...

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对口腔微生物与宿主相互作用的生理相关的共同培养模型.

Zeyang Pang1, Nicole Cady2, Lujia Cen3

  • 1Department of Biomedical Engineering, College of Engineering and School of Medicine, University of Michigan, Ann Arbor, MI 48109-5622, USA.

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概括

一个新的不对称气体培系统精确地模仿了口腔微环境. 这种先进的模型增强了口腔细菌与宿主相互作用的研究,并改善了对口腔疾病抗生素治疗的评估.

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科学领域:

  • 微生物学 微生物学
  • 口腔生物学 口腔生物学
  • 细胞生物学 细胞生物学

背景情况:

  • 了解口腔微生物与宿主相互作用对于口腔疾病病原和全身健康至关重要.
  • 现有的体外培养模型不能复制口腔的生理氧度梯度.
  • 这种限制阻碍了对无氧口腔细菌和宿主反应的准确研究.

研究的目的:

  • 开发和验证一个模拟口腔微环境的不对称气体培系统.
  • 为了研究生理氧度梯度对Fusobacterium核-牙上皮质细胞相互作用的影响.
  • 评估系统对研究宿主反应和评估治疗干预措施的有用性.

主要方法:

  • 设计了一个不对称的气体培系统,以保持不同的诺莫克斯和无氧条件.
  • 在模拟的口腔条件下,用端粒酶不朽化的牙角质细胞与Fusobacterium nucleatum共同培养.
  • 评估了细菌入侵,细胞内细菌负荷,宿主亲炎性细胞因子分泌和抗生素疗效.

主要成果:

  • 该系统成功地保持了细菌活力和牙上皮细胞完整性.
  • 与传统模型相比,不对称的系统显示了增强的细菌入侵和细胞内细菌负载.
  • 观察到促炎性细胞因子 (CXCL10,IL-6,IL-8) 的分泌量增加,这表明宿主反应更强大.
  • 该模型允许精确评估抗生素对细胞内口腔病原体的疗效.

结论:

  • 非对称气体培系统为研究口腔微生物病原体提供了一个生理学上相关的平台.
  • 这种模型增强了对口腔内无氧细菌与宿主相互作用的理解.
  • 该系统对于查治疗药物和推进口腔和全身健康方面的研究非常有价值.