Dual-Stimuli-Responsive Gut Microbiota-Targeting Nitidine Chloride-CS/PT-NPs Improved Metabolic Status in NAFLD

Abstract

Jianmei Lu,1,2,* Yongzhu Zeng,1,* Huashuai Zhong,1 Wei Guo,1 Yuyan Zhang,1 Wanting Mai,3 Yucui Qin,4 Xiaodan Su,3 Bo Zhang,5 Weisen Wu,1 Yu Zhu,1 Qiujie Huang,6 Yong Ye1,7– 9 1Department of Pharmacy, Guangxi Medical University, Nanning, People’s Republic of China; 2The Second Nanning People’s Hospital, Nanning, People’s Republic of China; 3The Second Affiliated Hospital of Guangxi Medical University, Nanning, People’s Republic of China; 4Maternity and Child Health Care of Guangxi Zhuang Autonomous Region, Nanning, People’s Republic of China; 5Scientific Research Center, Guilin Medical University, Guilin, People’s Republic of China; 6Department of Pharmacy, Guangxi University of Traditional Chinese Medicine, Nanning, People’s Republic of China; 7Guangxi Key Laboratory of Bioactive Molecules Research and Evaluation, Nanning, People’s Republic of China; 8Guangxi Key Laboratory of Pharmaceutical Precision Detection and Screening, Nanning, People’s Republic of China; 9Key Laboratory of Micro-Nanoscale Bioanalysis and Drug Screening of Guangxi Education Department, Nanning, People’s Republic of China*These authors contributed equally to this workCorrespondence: Qiujie Huang, Department of Pharmacy, Guangxi University of Traditional Chinese Medicine, Nanning, People’s Republic of China, Email [email protected] Yong Ye, Department of Pharmacy, Guangxi Medical University, Nanning, People’s Republic of China, Email [email protected] and Purpose: Nitidine chloride (NC) is a botanical drug renowned for its potent anti-inflammatory, antimalarial, and hepatocellular carcinoma-inhibiting properties; however, its limited solubility poses challenges to its development and application. To address this issue, we have devised a colon-targeted delivery system (NC-CS/PT-NPs) aimed at modulating the dysbiosis of the gut microbiota by augmenting the interaction between NC and the intestinal microbiota, thereby exerting an effect against nonalcoholic fatty liver disease.Methods: The NC-CS/PT-NPs were synthesized using the ion gel method. Subsequently, the particle size distribution, morphology, drug loading efficiency, and release behavior of the NC-CS/PT-NPs were characterized. Furthermore, the impact of NC-CS/PT-NPs on non-alcoholic fatty liver disease (NAFLD) induced by a high-fat diet (HFD) in mice was investigated through serum biochemical analysis, ELISA, and histochemical staining. Additionally, the influence of NC-CS/PT-NPs on intestinal microbiota was analyzed using 16S rDNA gene sequencing.Results: The nanoparticles prepared in this study have an average particle size of (255.9± 5.10) nm, with an encapsulation rate of (72.83± 2.13) % and a drug loading of (4.65± 0.44) %. In vitro release experiments demonstrated that the cumulative release rate in the stomach and small intestine was lower than 22.0%, while it reached 66.75% in the colon. In vivo experiments conducted on HFD-induced NAFLD mice showed that treatment with NC-CS/PT-NPs inhibited weight gain, decreased serum aspartate aminotransferase (AST), Alanine aminotransferase (ALT) and lipid levels, improved liver and intestinal inflammation, and altered the diversity of gut microbiota in mice.Conclusion: This study provides new evidence for the treatment of NAFLD through the regulation of gut microbiota using active ingredients from traditional Chinese medicine.Keywords: nanoparticles, colonic targeting, metabolic disorders, gut microbiota

Keywords

• nanoparticles
• colonic targeting
• metabolic disorders
• gut microbiota