The impact of aerobic exercise combined with Lactobacillus supplementation on the expression of adiponectin and APPL۱ genes in the liver tissue of Wistar rats with fatty liver disease

Non-alcoholic fatty liver disease (NAFLD) is a significant global health concern characterized by excessive fat accumulation in the liver, affecting individuals who consume little or no alcohol. This condition encompasses a spectrum of liver pathologies, ranging from simple hepatic steatosis to non-alcoholic steatohepatitis (NASH), fibrosis, and cirrhosis. NAFLD is closely associated with metabolic disorders such as obesity, type ۲ diabetes, and dyslipidemia, contributing to increased morbidity and mortality due to complications like cardiovascular disease and liver cancer. The prevalence of NAFLD has risen dramatically in recent years, paralleling the global obesity epidemic, with estimates suggesting that approximately ۲۵% of the adult population in Western countries is affected by this condition. The relationship between fatty liver disease and gene expression in the liver is crucial for understanding its pathophysiology. Various studies have identified distinct hepatic gene-expression patterns associated with different stages of NAFLD. For instance, research has shown that genes involved in lipid metabolism, inflammation, and fibrosis are differentially expressed as the disease progresses from simple steatosis to more severe forms like NASH. Adiponectin, an adipocyte-derived hormone, plays a critical role in regulating glucose levels and fatty acid breakdown. It exhibits anti-inflammatory properties and enhances insulin sensitivity, making it a key factor in metabolic health. Adiponectin levels are inversely correlated with body fat percentage; thus, individuals with obesity often present lower adiponectin levels. Its protective effects against hepatic steatosis have made adiponectin a focus of research in the context of NAFLD. Increased adiponectin levels are associated with improved metabolic profiles and reduced liver fat content. APPL۱ (adaptor protein containing PH domain, PTB domain, and leucine zipper motif ۱) is another critical protein involved in insulin signaling pathways. It serves as a scaffold for various signaling molecules and modulates adiponectin receptor signaling. Dysregulation of APPL۱ has been linked to insulin resistance and fatty liver disease. Studies indicate that APPL۱ expression is decreased in states of metabolic dysfunction, suggesting its potential role as a therapeutic target for managing NAFLD. Research has demonstrated that both adiponectin and APPL۱ are significantly affected by the presence of fatty liver disease. Lower adiponectin levels correlate with increased hepatic fat accumulation and inflammation, while APPL۱ expression decreases with worsening insulin resistance observed in NAFLD patients. Interventions aimed at increasing adiponectin levels or enhancing APPL۱ signaling have shown promise in improving metabolic outcomes and reducing liver fat content. Management strategies for fatty liver disease emphasize lifestyle modifications, particularly through diet and exercise. Regular physical activity has been shown to improve insulin sensitivity, reduce visceral fat, and promote weight loss—all critical factors in reversing or preventing the progression of NAFLD. Exercise can lead to significant improvements in liver function tests and histological features of liver tissue affected by fatty liver disease. Aerobic exercise specifically has emerged as an effective intervention for managing fatty liver due to its ability to enhance cardiovascular fitness while promoting fat oxidation. Studies have shown that aerobic training can lead to reductions in liver fat content, improvements in metabolic parameters, and increased adiponectin levels among individuals with NAFLD. These benefits underscore the importance of incorporating aerobic exercise into treatment plans for patients at risk of or suffering from fatty liver disease. The relationship between aerobic training and the expression of adiponectin and APPL۱ further supports exercise as a therapeutic modality for NAFLD. Increased physical activity has been associated with elevated adiponectin levels, which may contribute to improved insulin sensitivity and reduced hepatic steatosis. Additionally, exercise may enhance APPL۱ signaling pathways, thereby promoting better metabolic outcomes in individuals with fatty liver disease. Incorporating food supplements alongside exercise can complement lifestyle interventions for managing fatty liver disease. Nutritional supplements may provide additional support for metabolic health by enhancing the effects of physical activity on liver function. Research indicates that certain dietary components can modulate gene expression related to lipid metabolism and inflammation, thus playing a supportive role in the management of NAFLD. Lactobacillus supplementation represents one such dietary intervention gaining attention for its potential benefits on gut microbiota composition and metabolic health. Probiotics like Lactobacillus have been shown to improve gut barrier function, reduce systemic inflammation, and influence lipid metabolism favorably. These effects may contribute positively to managing conditions like NAFLD by addressing both metabolic dysregulation and gut health simultaneously. Investigations into the effects of Lactobacillus supplementation on fatty liver have yielded promising results. Studies suggest that probiotics can help lower hepatic fat accumulation while increasing adiponectin levels, thereby mitigating some adverse effects associated with fatty liver disease. Furthermore, Lactobacillus may interact synergistically with exercise to enhance overall metabolic health outcomes. Addressing fatty liver through non-drug approaches such as lifestyle modifications—including dietary supplements-offers a promising avenue for management without reliance on pharmacological treatments. This holistic approach not only targets weight reduction but also aims at improving hepatic function through natural means. The synergy between dietary supplements like Lactobacillus and exercise raises intriguing questions about their combined effects on metabolic health. Understanding how these interventions work together could provide insights into optimizing treatment strategies for individuals with fatty liver disease while minimizing reliance on medications. In summary, this study aims to explore the combined effects of aerobic exercise and Lactobacillus supplementation on adiponectin and APPL۱ gene expression in Wistar rats with fatty liver. By investigating these interactions, we hope to elucidate potential mechanisms underlying effective non-pharmacological strategies for managing fatty liver disease.

کلیدواژه ها:

Aerobic exercise ، Lactobacillus ، Adiponectin ، APPL۱ ، Fatty liver