Applications and Advances of Drosophila in Research of Obesity and Its Related Metabolic Diseases

doi:10.12300/j.issn.1674-5817.2025.104

Abstract

Abstract:

Obesity is a chronic metabolic disease caused by long-term imbalance between energy intake and expenditure, which can significantly increase risks of cardiovascular diseases, type 2 diabetes, various cancers, and premature aging. The latest WHO statistics show that global overweight and obesity rates among adults continue to rise, making obesity a public health problem requiring urgent precise prevention and control. This review systematically summarizes the unique value and application advances of Drosophila melanogaster as a model organism in obesity and metabolic disease research. Due to its short life cycle, low rearing cost, high homology with human disease-related genes, conserved organ functions, and well-developed genetic tools, Drosophila has emerged as an efficient model organism for analyzing obesity and metabolic disorders. Feeding high-sugar/high-fat diets to Drosophila can stably replicate typical obesity-related phenotypes such as lipid accumulation, insulin resistance, impaired cardiometabolic function, and shortened lifespan, and can be combined with tissue- or cell type–specific genetic manipulations for target discovery and mechanism verification. At the organ level, the fat body functions as a central hub for energy storage, metabolic sensing, and endocrine regulation; oenocytes participate in lipid, sterol, and very-long-chain fatty acid metabolism and starvation response; the midgut integrates signals from nutrients and gut microbiota through regionalized absorption and enteroendocrine functions; the malpighian tubules, besides excretion, also regulate reabsorption and influence body size through energy sensing pathways and glucose transporter membrane localization. Muscles are the primary energy-consuming organs in Drosophila with flight muscles exhibiting the highest energy demand. They primarily utilize trehalose and glucose from the hemolymph for energy supply. Additionally, they can mobilize glycogen and fatty acids to participate in energy metabolism. Additionally, circadian rhythm and feeding time (such as time-restricted feeding) can reshape peripheral clock-metabolism coupling, alleviating diet-induced metabolic disorders. Moreover, they regulate systemic metabolic homeostasis through myogenic factors.In cross-organ endocrine regulatory network, brain insulin-like peptide producing cells secrete insulin-like peptides to lower blood sugar and promote metabolic balance, whereas the corpora cardiaca release adipokinetic hormone to increase blood sugar and stimulate lipolysis. These two endocrine systems functionally antagonize each other, together forming a key metabolic homeostasis regulatory axis in Drosophila. Fat body and intestine regulate insulin-like peptide secretion according to nutritional status by releasing Unpaired 2, Limostatin, and adiponectin-like factors, forming a multi-level "gut-fat body-brain-peripheral organ" feedback loop. In summary, Drosophila, with its highly conserved organ functions and metabolic pathways and its powerful genetic tools, provides an efficient and scalable experimental platform for analyzing obesity etiology, elucidating cross-tissue signaling networks, discovering potential translational targets, and evaluating nutritional/pharmacological intervention strategies.

Key words: Model animal, Drosophila melanogaster, Obesity, Metabolic disorder, Glucose and lipid metabolism

CLC Number:

Q964

CHEN Haotian,LIU Jingnan. Applications and Advances of Drosophila in Research of Obesity and Its Related Metabolic Diseases[J]. Laboratory Animal and Comparative Medicine, 2025, 45(6): 688-704. DOI: 10.12300/j.issn.1674-5817.2025.104.

Figures/Tables 3

References 103

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