ryanodine/dental caries

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Mapping Ryanodine Binding Sites in the Pore Cavity of Ryanodine Receptors.

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Ryanodine (Ryd) irreversibly targets ryanodine receptors (RyRs), a family of intracellular calcium release channels essential for many cellular processes ranging from muscle contraction to learning and memory. Little is known of the atomistic details about how Ryd binds to RyRs. In this study, we

FRET-based localization of fluorescent protein insertions within the ryanodine receptor type 1.

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Fluorescent protein (FP) insertions have often been used to localize primary structure elements in mid-resolution 3D cryo electron microscopic (EM) maps of large protein complexes. However, little is known as to the precise spatial relationship between the location of the fused FP and its insertion

Investigations of the contribution of a putative glycine hinge to ryanodine receptor channel gating.

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Ryanodine receptor channels (RyR) are key components of striated muscle excitation-contraction coupling, and alterations in their function underlie both inherited and acquired disease. A full understanding of the disease process will require a detailed knowledge of the mechanisms and structures

Direct block of human ether-a-go-go-related gene potassium channels by caffeine.

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The human ether-a-go-go-related gene (hERG) potassium channel is expressed in a variety of cell types, including neurons, tumor cells, and cardiac myocytes. In the heart, it is important for repolarization of the cardiac action potential. Attenuation of hERG current can cause long QT syndrome and

Structural insights into excitation-contraction coupling by electron cryomicroscopy.

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In muscle, excitation-contraction coupling is defined as the process linking depolarization of the surface membrane with Ca2+ release from cytoplasmic stores, which activates contraction of striated muscle. This process is primarily controlled by interplay between two Ca2+ channels--the

Differences in sarcoplasmic reticulum Ca²⁺ leak characteristics between systolic and diastolic heart failure rabbit models.

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Diastolic heart failure (DHF) and systolic heart failure (SHF) are two clinical subsets of chronic heart failure (CHF). Sarcoplasmic reticulum (SR) Ca²⁺ leak has been measured in SHF and might contribute to contractile dysfunction and arrhythmogenesis. However, no study has investigated a similar

A novel RYR2 loss-of-function mutation (I4855M) is associated with left ventricular non-compaction and atypical catecholaminergic polymorphic ventricular tachycardia.

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Catecholaminergic polymorphic ventricular tachycardia (CPVT) is an ion channelopathy usually caused by gain-of-function mutations ryanodine receptor type-2 (RyR2). Left ventricular non-compaction (LVNC) is an often genetic cardiomyopathy. A rare LVNC-CPVT overlap syndrome may be caused by exon 3

Exercise Training Attenuates Right Ventricular Remodeling in Rats with Pulmonary Arterial Stenosis.

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Introduction: Pulmonary arterial stenosis (PAS) is a congenital defect that causes outflow tract obstruction of the right ventricle (RV). Currently, negative issues are reported in the PAS management: not all patients may be eligible to surgeries; there is often the need for another surgery during

Effect of metoprolol on sarcoplasmic reticulum Ca2+ leak in a rabbit model of heart failure.

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BACKGROUND Studies have shown that β-blockers can improve cardiac performance in heart failure (HF) by reversing protein kinase A (PKA)-mediated sarcoplasmic reticulum (SR) Ca2+ leak. However, it is being strongly questioned as to whether the PKA-mediated ryanodine receptor (RyR2)

Arrhythmogenic mechanisms in a mouse model of catecholaminergic polymorphic ventricular tachycardia.

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Catecholaminergic polymorphic ventricular tachycardia (VT) is a lethal familial disease characterized by bidirectional VT, polymorphic VT, and ventricular fibrillation. Catecholaminergic polymorphic VT is caused by enhanced Ca2+ release through defective ryanodine receptor (RyR2) channels. We used

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