MYST1-Mediated Lysine Acetylation Stabilizes KLF4 to Promote Intimal Hyperplasia

Area of Science:

• Cardiovascular Biology
• Molecular Medicine
• Cellular Biology

Background:

• Intimal hyperplasia is a critical process in cardiovascular diseases like atherosclerosis.
• The precise molecular mechanisms driving intimal hyperplasia remain incompletely understood.
• Identifying novel therapeutic targets is crucial for managing vasoproliferative disorders.

Purpose of the Study:

• To investigate the role of acetyltransferase MYST1 in intimal hyperplasia following vascular injury.
• To elucidate the molecular mechanisms by which MYST1 influences smooth muscle cell (SMC) behavior.
• To evaluate MYST1 as a potential therapeutic target for intimal hyperplasia.

Main Methods:

• Utilized a rat carotid artery injury model and in vitro SMC culture.
• Employed lentiviral transfection for MYST1 knockdown and overexpression.
• Applied histological staining, immunofluorescence, Western blot, and immunoprecipitation techniques.

Main Results:

• Vascular injury significantly increased MYST1 expression in the rat model.
• MYST1 knockdown inhibited SMC proliferation and migration, attenuating neointima formation.
• MYST1 enhances KLF4 protein stability via lysine acetylation, reducing its ubiquitination and degradation.

Conclusions:

• MYST1 plays a crucial role in regulating SMC phenotypic transformation during intimal hyperplasia.
• MYST1-mediated acetylation of KLF4 is a key mechanism driving vascular remodeling.
• Targeting MYST1 presents a promising therapeutic strategy for vasoproliferative diseases.