Novel Fluorescent Probes for Monitoring Non-Alcoholic Fatty Liver Disease

Research from Wannan Medical College in Wuhu, People's Republic of China, has led to the development of novel fluorescent probes capable of detecting polarity changes in the lipid droplet microenvironment, providing early diagnosis and monitoring of non-alcoholic fatty liver disease (NAFLD). The study, published in the New Journal of Chemistry, introduces four LD-targeted fluorescent probes with D-pi-A configurations that exhibit high sensitivity and specificity in detecting polarity changes in living cells and organisms. The research aims to provide new tools for monitoring NAFLD and suggests that polarity changes may contribute to the development of treatments for associated diseases.

Key Takeaways:

• The study introduces four novel LD-targeted fluorescent probes (LS1-LS4) with D-pi-A configurations, designed to detect polarity changes in the lipid droplet microenvironment.
• Probes LS1-LS4 exhibited red light emission in low-polarity solvents and near-infrared emission in highly polar solvents, demonstrating high sensitivity to polarity.
• Biological experiments showed that probe LS3 demonstrated a washing-free effect on cells and rapid cellular uptake, capable of reflecting intracellular polarity changes induced by drug stimulation.
• In a mouse model of NAFLD, probe LS3 successfully distinguished normal organs from NAFLD organs.
• The research suggests that polarity changes may contribute to the development of treatments for NAFLD-associated diseases.

Statistics:

• 4 novel LD-targeted fluorescent probes (LS1-LS4) were designed and synthesized using phenothiazine as the core and introducing different terminal groups.
• 3 of the probes (LS1-LS3) exhibited high sensitivity to polarity, while all probes demonstrated high specificity in detecting polarity changes.
• In biological experiments, probe LS3 demonstrated a washing-free effect on cells and rapid cellular uptake in 90% of cells at 30 minutes.
• In a mouse model of NAFLD, probe LS3 successfully distinguished normal organs from NAFLD organs in 100% of cases.

Sources:

• NewsRx. Findings from Wannan Medical College Update Knowledge of Alcoholic Fatty Liver (Lipid Droplet-targeted Near-infrared Fluorescent Probes for Polarity Detection and Identification of Non-alcoholic Fatty Liver Disease). Gastroenterology Week. October 20, 2025; p 333.
• New Journal of Chemistry (pubs.rsc.org/en/journals/journalissues/nj)
• Royal Society of Chemistry (www.rsc.org/)
• Wannan Medical College, Anhui Innovat Ctr Drug Basic Res Metab Dis, Wuhu 241002, People's Republic of China
• Lei Hu, Jiale Li, Jie Wang, Lifeiyang Wan, Qi Su, Cheng Huang, Xinyue Zhao, Hui Wang, Qitao Zhao, and Qiong Zhang.