Nanotechnology in Appetite Regulation: Targeting Hypothalamic Pathways and Gut-Brain Axis in Obesity

Mwende Wairimu G.

School of Natural and Applied Sciences Kampala International University Uganda

                                                                                                ABSTRACT
Obesity is increasingly understood as a brain-centric disorder in which hypothalamic circuits and the gut–brain axis fail to correctly integrate peripheral signals of energy status. Hypercaloric diets and adipose expansion drive leptin and insulin resistance, neuroinflammation and altered gut hormone signaling, leading to persistent hyperphagia and reduced energy expenditure. Existing anti-obesity drugs, including GLP-1 receptor agonists, modulate some of these pathways but are limited by systemic side effects, variable brain penetration and receptor desensitization. Nanotechnology offers new opportunities to deliver appetite-regulating agents directly and selectively to central and peripheral nodes of energy homeostasis. This review examines the neurobiology of hypothalamic appetite control and gut–brain communication, then outlines nanocarrier strategies for crossing the blood–brain barrier or using nose-to-brain and gut-to-brain routes. We discuss nano-enabled delivery of
hormones, peptides and small molecules that modulate leptin, melanocortin, GLP-1 and inflammatory pathways, including approaches that rescue hypothalamic leptin signaling and dampen diet-induced neuroinflammation. Finally, we consider theranostic systems, safety and ethical issues, and prospects for integrating nanotechnology into precision appetite-targeted obesity therapy.

Keywords: Nanotechnology; Appetite regulation; Hypothalamus; Gut–brain axis; Obesity

CITE AS: Mwende Wairimu G. (2026). Nanotechnology in Appetite Regulation: Targeting Hypothalamic Pathways and Gut-Brain Axis in
Obesity. NEWPORT INTERNATIONAL JOURNAL OF RESEARCH IN MEDICAL SCIENCES. https://doi.org/10.59298/NIJRMS/2026/7.1.7380