Acidic Nanoparticles Restore Lysosomal Acidification and Rescue Metabolic Dysfunction in Pancreatic β-Cells under...

Area of Science:

• Biomaterials Science
• Cell Biology
• Metabolic Disorders

Background:

• Type 2 diabetes (T2D) is linked to impaired lysosomal acidification, autophagy, and mitochondrial function.
• Current treatments for T2D are limited, necessitating novel therapeutic strategies.

Purpose of the Study:

• To engineer novel biodegradable nanoparticles (NPs) capable of acidifying lysosomes.
• To evaluate the therapeutic potential of these NPs in preclinical models of T2D.

Main Methods:

• Synthesis of biodegradable poly(butylene tetrafluorosuccinate-co-succinate) polyesters as NPs.
• Characterization of NP size, stability, and acidifying properties.
• Assessment of NP efficacy in T2D models, including human T2D islets, INS-1 cells, and high-fat-diet (HFD) mice.

Main Results:

• TFSA-based NPs demonstrated superior degradation and lysosome-acidifying capabilities.
• NP treatment restored lysosomal acidification, autophagy, and mitochondrial activity in T2D models.
• TFSA NP administration in HFD mice improved glucose clearance and reduced insulin resistance.

Conclusions:

• Lysosome-acidifying TFSA NPs represent a promising therapeutic approach for T2D.
• Restoring lysosomal function is a viable strategy for managing T2D-associated metabolic dysfunction.