ArticlePloS one2026
Cardiomyocyte hypertrophy co-localizes with accumulation of hyaluronan in cMyBPC+/- mice hearts.
Article in PloS one, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Hypertrophic cardiomyopathy (HCM) is a genetic heart disease characterized by left ventricular hypertrophy. Mutations in genes for sarcomere proteins, e.g., in cardiac myosin-binding protein C (cMyBPC), may cause symptoms like heart failure and sudden cardiac death. In HCM, the heart utilizes high amounts of glucose. Increased glucose metabolism creates intermediates for hyaluronan (HA) synthesis, resulting in HA accumulation within the extracellular space, which could contribute to cardiomyocyte hypertrophy. We aimed to describe the connection between HA and cardiomyocyte hypertrophy using cMyBPC+/- mice treated with two different β-blockers - either metoprolol or propranolol - for 11 months. The results showed that HA metabolism is altered in HCM, and that HA is significantly more abundant in hearts of cMyBPC+/- mice compared to wild-type mice. Areas of high HA abundance were spread around the tissue in a 'patchy' manner. This focally increased HA concentration correlated with increased cardiomyocyte size in the same areas of the heart. Gene expression of HA synthase 2 was elevated in cMyBPC+/- mice. Treatment with propranolol maintained HA synthase 2 at wild-type level, while significantly increasing HA synthase 3 expression. However, treatment with metoprolol or propranolol did not prevent HA accumulation nor decreased cardiomyocyte hypertrophy. These novel findings visualise a spatial connection between high HA abundance and cardiomyocyte hypertrophy in the hearts of cMyBPC+/- mice.
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