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MARCH5 ameliorates aortic valve calcification via RACGAP1-DRP1 pathway associated mitochondrial quality control.
Biochim Biophys Acta Mol Cell Res
January 2025
Laboratory of Cardiac Structure and Function, Institute of Cardiovascular Diseases, West China Hospital, Sichuan University, Chengdu 610041, PR China; Department of Cardiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China; Cardiac Structure and Function Research Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, Chengdu 610041, PR China. Electronic address:
Background: Mitochondrial E3 ubiquitin ligase (MARCH5) as an important regulator in maintaining mitochondrial function. Our aims were to investigate the role and mechanism of MARCH5 in aortic valve calcification.
Methods: Human aortic valves, both calcified and non-calcified, were analyzed for MARCH5 expression using western blot.
Re-sheathing failure with Navitor during transcatheter aortic valve implantation: a case report.
Eur Heart J Case Rep
January 2025
The Second Department of Internal Medicine, University of Toyama, 2630 Sugitani, Toyama, Toyama 930-0194, Japan.
Background: Self-expanding valves used in transcatheter aortic valve implantation (TAVI) are designed to allow recapture and repositioning, facilitating optimal placement and mitigating conduction disturbances and paravalvular leakage. Here, we present a rare case in which the Navitor (Abbott Structural Heart, Santa Clara, CA, USA) could not be recaptured.
Case Summary: An 81-year-old Japanese woman with very severe aortic stenosis and a massively calcified nodule at the non-coronary cusp (NCC) underwent TAVI with a 25 mm Navitor valve.
Novel approach to treating calcified infrarenal aortic stenosis using intravascular lithotripsy without stenting.
J Vasc Surg Cases Innov Tech
April 2025
Vascular Surgery Unit, S. Chiara Hospital, APSS Trento, Trento, Italy.
This case report presents the use of intravascular lithotripsy (IVL) in a 68-year-old woman with disabling bilateral claudication owing to a heavily calcified subocclusive stenosis of the infrarenal aorta. The patient had a history of tobacco use, dyslipidemia, and chronic obstructive pulmonary disease, with absent femoral pulses and severe arterial calcification. A 12-mm Shockwave L6 lithotripsy catheter was employed to treat the aortic lesion, resulting in a significant decrease in the aortic pressure gradient without the need for stenting.
View Article and Find Full Text PDFA collagen-based laboratory model to mimic sex-specific features of calcific aortic valve disease.
Acta Biomater
January 2025
Department of Mining and Materials Engineering, McGill University, 3610 Rue University, Montreal, QC H3A 0C5, Canada. Electronic address:
Calcific aortic valve disease (CAVD) shows in the deposition of calcium phosphates in the collagen-rich layer of the valve leaflets. This stiffens the leaflets and eventually leads to heart failure. Recent research suggests that CAVD follows sex-specific pathways: at the same severity of the disease, women tend to have fewer and less crystalline calcifications, and the phases of their calcifications are decidedly different than those of men; namely, dicalcium phosphate dihydrate (DCPD) - one of the mineral phases in CAVD - occurs almost exclusively in females.
View Article and Find Full Text PDFNon-Canonical TERT Activity Initiates Osteogenesis in Calcific Aortic Valve Disease.
Circ Res
January 2025
Division of Cardiology, Department of Medicine, Pittsburgh Heart, Lung, Blood and Vascular Medicine Institute, University of Pittsburgh, PA. (R.A.C., C.C.C., R.W., A.C., C.B., C.R., W.J.M., M.J. Bashline, A.P., A.M.P., P.B., M.J. Brown, C.S.H.).
Background: Calcific aortic valve disease is the pathological remodeling of valve leaflets. The initial steps in valve leaflet osteogenic reprogramming are not fully understood. As TERT (telomerase reverse transcriptase) overexpression primes mesenchymal stem cells to differentiate into osteoblasts, we investigated whether TERT contributes to the osteogenic reprogramming of valve interstitial cells.
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