Microbiota in health and diseases

Area of Science:

• Microbiology
• Immunology
• Human Health

Background:

• The human microbiota comprises diverse microbial communities residing in various body sites, including the gut, skin, and respiratory tract.
• These microbes exist in symbiosis with the host, crucial for maintaining homeostasis and regulating immune functions.
• Dysbiosis, or microbial imbalance, is increasingly implicated in the pathogenesis of numerous diseases.

Purpose of the Study:

• To review the current understanding of the relationship between microbiota and host health or disease.
• To summarize the role of microbiota in healthy physiological conditions.
• To highlight the mechanisms by which microbiota dysbiosis contributes to disease development and progression.

Main Methods:

• This review synthesizes existing research on microbiota's role in health and disease.
• It covers findings related to the gut-brain axis, colonization resistance, and immune modulation in healthy states.
• The review examines the pathogenesis of dysbiosis, focusing on community composition, immune response modulation, and chronic inflammation.

Main Results:

• Microbiota are essential for host homeostasis and immune regulation.
• Dysbiosis disrupts bodily functions and is associated with cardiovascular diseases, cancers, and respiratory illnesses.
• Key pathogenic mechanisms include altered microbial community structure, aberrant host immune responses, and chronic inflammation.

Conclusions:

• The human microbiota significantly influences host health and disease.
• Microbiota dysbiosis is a critical factor in disease pathogenesis.
• Clinical strategies such as microbiota modulation and fecal microbial transplantation show promise for disease treatment.