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Sarcoplasmic Reticulum Calcium Release (SR Calcium Release)

Target: SR Calcium Release
Molecular classification: Physiological Process, Cellular Signaling Pathway

Overview

Sarcoplasmic reticulum (SR) calcium release is the process by which calcium ions (Ca2+) are released from the sarcoplasmic reticulum, a specialized organelle in muscle cells. This release is crucial for initiating muscle contraction in skeletal, cardiac, and smooth muscle. The SR acts as an intracellular store of Ca2+, and upon stimulation, Ca2+ is rapidly released into the cytoplasm through ryanodine receptors (RyRs). After contraction, Ca2+ is actively pumped back into the SR by SERCA pumps, allowing relaxation. Dysregulation of SR calcium release can lead to various diseases, including heart failure, malignant hyperthermia, and Brody disease.

Other names: SR Ca2+ ReleaseCalcium Release from Sarcoplasmic ReticulumExcitation-Contraction Coupling (Calcium Release Phase)

Mechanism of action

Modulation of calcium release channels (RyRs) or calcium reuptake pumps (SERCA) to influence muscle contractility.

Biological functions

Muscle ContractionIntracellular Calcium SignalingExcitation-Contraction CouplingRegulation of Cytosolic Calcium Concentration

Disease associations

Heart FailureMalignant HyperthermiaCentral Core DiseaseBrody DiseaseArrhythmias

Safety considerations

Dysregulation can lead to arrhythmiasImpaired muscle functionIncreased risk of hyperthermia

Interacting drugs

Ryanodine

2 more in the full profile.

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