10/13/2026
A self-healing hydrogel derived from Polygonatum sibiricum, a plant long used in traditional Chinese medicine, improved Parkinson’s disease-related damage in rat and cellular models, according to researchers at Ningbo University and Wenzhou Medical University. Published in Advanced Science, the study describes an injectable material made by chemically modifying a polysaccharide from the plant and crosslinking it with carboxymethyl chitosan.
Beyond serving as a drug-delivery vehicle, the hydrogel appeared to actively modify the diseased brain environment. In Parkinson’s models, the drug-free hydrogel reduced oxidative stress and neuroinflammation, protected dopamine-producing neurons, and improved motor behaviors. Adding levodopa enhanced several of these effects.
Proteomic and molecular analyses implicated activation of the TGF-β/Smad signaling pathway, while experiments using the TGF-β attenuator pirfenidone provided evidence that the pathway contributes to the hydrogel’s effects. While the findings are promising, questions about long-term safety, biodistribution, and clinical feasibility require further study. Click below to learn more.
An injectable self-healing hydrogel made from an oxidized polysaccharide of the traditional Chinese medicine herb Huangjing protects dopaminergic neurons in rat and cellular Parkinson's disease