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Bacteriology Lab
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The lab explores the relationship between gut bacteria and the host's immune system.
AboutAbout the lab
Exploring the relationship between gut bacteria and host immunity
The Bacteriology Lab studies the functions of gut bacteria and their interactions with the immune system.
The commensal microbiota living in the human gut plays an essential role in activating and maintaining the host's immune system.
On the other hand, pathogenic bacteria that enter through the mouth use a variety of mechanisms to establish infection within the gut environment.
Through research on both sides, the lab aims to gain a comprehensive understanding of the relationship between bacteria and the host.
Key terms
- Commensal microbiota
- The community of bacteria living in the human gut. It plays an essential role in activating and maintaining the host's immune system.
- Regulatory T cells
- Immune cells that play a central role in maintaining immune homeostasis. Commensal bacteria in the gut are known to induce their differentiation.
- Dysbiosis
- An imbalance of the gut microbiota. It is becoming clear that it is associated with the onset of various diseases.
NewsLab news
View More ↗ResearchResearch themes
The lab focuses on the interaction between the gut microbiota and the host's immune system, as well as the mechanisms of pathogenicity in pathogenic bacteria. Through research on both sides, the lab aims to gain a comprehensive understanding of the relationship between bacteria and the host.
*Illustrative imageInduction of immune cells by gut bacteria
Commensal bacteria in the gut are known to induce the differentiation of regulatory T cells (Treg), which maintain immune homeostasis, and Th17 cells. The lab aims to isolate and identify the bacterial species that specifically induce these cells and to clarify the underlying mechanisms at the molecular level.
*Illustrative imageGut microbiota imbalance and disease
It is becoming clear that imbalance of the gut microbiota (dysbiosis) is associated with the onset of a wide range of diseases, including inflammatory bowel disease, allergies, autoimmune diseases, cancer, and diabetes. The lab investigates causal relationships using animal disease models and human stool samples.
*Illustrative imageSearching for beneficial gut bacteria and their applications
The lab isolates and identifies gut bacteria that play beneficial roles in humans and analyzes the mechanisms of their colonization and action. In the future, the lab aims to apply them to next-generation probiotics and disease treatment.
*Illustrative imagePathogenicity of pathogenic bacteria and its control by gut bacteria
The lab analyzes, at the molecular and cellular levels, how bacteria such as Salmonella and enterohemorrhagic E. coli establish infection through toxin production, invasion of host cells, and immune evasion. It also investigates how the gut microbiota controls the colonization, growth, and toxin production of pathogenic bacteria.
MembersFaculty
The members of the Bacteriology Lab consist of faculty members, PhD students, research students, and research support staff.
- ProfessorKoji Atarashi
- LecturerKeiji Nakamura
- Assistant ProfessorNaoko Atarashi
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Bacteria in the gut” NIH Image Gallery / CC BY 2.0 (cropped)
- Induction of immune cells by gut bacteria: “Killer T cells surround a cancer cell” NIH Image Galle / CC BY-SA 4.0 (cropped)
- Gut microbiota imbalance and disease: “Gut-brain-microbiome axis” U3239091 / CC0 (cropped)
- Searching for beneficial gut bacteria and their applications: “Making probiotics cabbage carrot” Zenyrgarden / CC BY-SA 4.0 (cropped)
- Pathogenicity of pathogenic bacteria and its control by gut bacteria: “SalmonellaNIAID” 作者不詳 / Public domain (cropped)
- Related lab (Laboratory Animal Science Lab): “Laboratory ICR Mouse post-Stereotactic surgery” Minyoung Choi from Cupertino, CA, USA / CC BY-SA 2.0 (cropped)
- Related lab (Disease Information Research Lab): “Respiratory system - Olfactory bulb 1 -- Smart-Servier” Laboratoires Servier / CC BY-SA 3.0 (cropped)
- Related lab (Neuropsychiatry Lab): “Rat primary cortical neuron culture, 3D reconstruction ( )” ZEISS Microscopy from Germany / CC BY 2.0 (cropped)
- Related lab (Neuroanatomy Lab): “Sagittal brain slice, UB Museum of Neuroanatomy, Buffalo, New York” Caldwbr / CC BY-SA 4.0 (cropped)
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