Thesis Abstract

Abstract
The intricate relationship between the gut and the brain, known as the gut-brain axis, has gained significant attention in recent years due to its influence on various aspects of human health and disease. One key player in this axis is the gut microbiota, a complex community of microorganisms residing in the gastrointestinal tract. This thesis delves into the role of microbiota in gut-brain axis communication, aiming to provide a comprehensive understanding of the mechanisms involved and their implications for human health. The introduction sets the stage by exploring the background of the study, highlighting the importance of the gut-brain axis in maintaining physiological balance and overall well-being. The problem statement underscores the gaps in current knowledge regarding the specific contributions of microbiota to gut-brain communication. The objectives of the study are outlined to elucidate the specific goals and research questions that will be addressed. Limitations and scope of the study are discussed to provide a clear delineation of the research boundaries. The significance of the study is emphasized to underscore its potential impact on advancing our understanding of the gut-brain axis. Lastly, the structure of the thesis and key definitions of terms are provided to guide the reader through the subsequent chapters. The literature review in Chapter Two delves into existing research on the gut-brain axis and the role of microbiota in this intricate communication network. Ten key themes are explored, including the bidirectional signaling pathways between the gut and the brain, the impact of microbiota on neurodevelopment, and the modulation of neurotransmitter production by gut microbes, among others. Chapter Three details the research methodology employed in this study, encompassing eight key components such as study design, participant selection criteria, data collection methods, and data analysis techniques. The rigorous methodology ensures the reliability and validity of the findings presented in this thesis. Chapter Four presents a thorough discussion of the research findings, elucidating the specific mechanisms through which microbiota influence gut-brain communication. The implications of these findings for human health and disease are explored in depth, shedding light on potential therapeutic interventions that target the gut microbiota to improve brain health. In the concluding Chapter Five, the key findings of the study are summarized, highlighting the novel insights gained into the role of microbiota in gut-brain axis communication. The implications of these findings for future research and clinical practice are discussed, paving the way for further exploration in this exciting field. Overall, this thesis contributes to the growing body of knowledge on the gut-brain axis and underscores the pivotal role of microbiota in mediating communication between the gut and the brain. The findings presented herein have the potential to inform future research directions and therapeutic interventions aimed at optimizing gut-brain health and overall well-being.

Thesis Overview