Molecular hydrogen suppresses activated Wnt/β-catenin signaling

Area of Science:

• Biochemistry
• Molecular Biology
• Cell Signaling

Background:

• Molecular hydrogen (H2) shows therapeutic potential across various diseases.
• The precise molecular mechanisms of H2 action remain incompletely understood.
• H2 is recognized as a gaseous signaling modulator influencing cellular processes.

Purpose of the Study:

• To elucidate the molecular basis of H2's therapeutic effects.
• To investigate H2's impact on the Wnt/β-catenin signaling pathway.
• To determine if H2 can suppress aberrant Wnt/β-catenin activation in disease models.

Main Methods:

• Investigated H2's effect on β-catenin phosphorylation and degradation.
• Utilized genetic inhibition of GSK3 and mutations in β-catenin phosphorylation sites.
• Examined the role of the β-catenin destruction complex components (CK1, GSK3, APC, Axin1).
• Assessed H2's impact on Wnt/β-catenin signaling in human osteoarthritis chondrocytes.
• Evaluated H2 water's efficacy in a rat osteoarthritis model.

Main Results:

• H2 suppresses activated Wnt/β-catenin signaling by enhancing β-catenin phosphorylation and degradation.
• The suppressive effect of H2 is dependent on CK1/GSK3 phosphorylation sites on β-catenin and the integrity of the destruction complex.
• H2 does not directly affect GSK3 activity.
• H2 reduced Wnt/β-catenin activation in osteoarthritis chondrocytes and ameliorated cartilage degradation in a rat model.

Conclusions:

• H2 suppresses abnormally activated Wnt/β-catenin signaling through a mechanism involving the β-catenin destruction complex.
• This suppression of Wnt/β-catenin signaling contributes to the protective effects of H2 in certain diseases, including osteoarthritis.
• H2 represents a potential therapeutic agent targeting aberrant Wnt/β-catenin pathway activation.