# A thermosensitive hydrogel encapsulating 2-DG alleviates periodontitis by inhibiting glycolysis and effector response of Th17 cells

## TL;DR

A thermosensitive hydrogel containing 2-DG reduces periodontitis by inhibiting Th17 cell activity and glycolysis, offering a new treatment approach.

## Contribution

A novel thermosensitive hydrogel delivery system for 2-DG is developed to locally inhibit Th17 cell glycolysis in periodontitis.

## Key findings

- IL17A-KO mice showed reduced alveolar bone resorption in periodontitis.
- CD4+ T cells under periodontitis conditions showed increased Th17 differentiation and glycolysis.
- Local 2-DG hydrogel application reduced inflammation and bone destruction in murine models.

## Abstract

To investigate the mechanism of Th17 cells in immunomodulation during periodontitis and develop a localized drug delivery system based on glycolysis inhibition for safer and more effective therapeutic interventions.

Periodontitis models were established via the use of IL17A-KO mice to evaluate the impact of Th17-related cytokine deficiency on pathological progression. Using single-cell RNA sequencing (scRNA-seq), we investigated the metabolic profile of CD4+ T cells under periodontitis conditions. The glycolysis inhibitor 2-deoxy-D-glucose (2-DG) was used to assess its ability to suppress CD4+ T-cell proliferation and Th17 differentiation. A thermosensitive PLGA-PEG-PLGA hydrogel encapsulating 2-DG was synthesized and locally administered to a murine periodontitis model.

IL17A-KO mice exhibited significantly attenuated alveolar bone resorption. Single-cell RNA sequencing revealed that, under periodontitis conditions, CD4+ T cells exhibited enhanced differentiation toward Th17 cells and increased glycolysis. The 2-DG hydrogel inhibited CD4+ T-cell expansion and Th17 polarization. Local application of the 2-DG hydrogel reduced periodontal inflammation, decreased bone destruction, and diminished granulocyte infiltration in gingival tissues.

Th17-cell differentiation exacerbates periodontitis progression, and glycolysis inhibition effectively modulates Th17-driven immunity. The localized 2-DG hydrogel delivery system presents a promising translational strategy for periodontitis management.