Mice study links statin muscle pain to calcium regulation disruption
Researchers identified a genetic mechanism behind statin-induced muscle symptoms in a mouse model, pointing to altered calcium handling in muscle cells.
In a 2025 study published in the Journal of Clinical Investigation, researchers demonstrated a biological mechanism that may explain statin-associated muscle symptoms, as reported by WP abcZdrowie 
portal.abczdrowie.plWP abcZdrowieportal.abczdrowie.plOpen source ↗. Statins are widely prescribed to reduce LDL cholesterol and lower the risk of heart attack and stroke. However, adverse reactions including pain, cramps, or weakness—collectively termed statin-associated muscle symptoms (SAMS)—affect up to 10 percent of patients, leading some to discontinue therapy.
Calcium signaling in muscle cells
To identify the biological driver behind these adverse effects, the investigators administered simvastatin to two groups of mice portal.abczdrowie.plWP abcZdrowieportal.abczdrowie.plOpen source ↗. One cohort carried a specific genetic mutation affecting the function of skeletal muscle. The experiment revealed that animals carrying this mutation were significantly more susceptible to the adverse effects of the drug.
The findings showed that the genetic variant disrupts the regulation of calcium release inside muscle cells portal.abczdrowie.plWP abcZdrowieportal.abczdrowie.plOpen source ↗. This malfunction leads to an abnormal increase in intracellular calcium concentrations, which promotes muscle discomfort and tissue dysfunction.
Clinical considerations and limitations
Cardiologists note that identifying the root causes of statin-induced myopathy could improve therapeutic strategies and reduce treatment abandonment in the future portal.abczdrowie.plWP abcZdrowieportal.abczdrowie.plOpen source ↗. Dr. Catherine Benziger noted that while statins remain a validated tool for cardiovascular risk reduction, muscle pain frequently presents a barrier to compliance, requiring clinicians to adjust dosages or substitute agents.
Dr. Cheng-Han Chen emphasized that the current findings were obtained strictly in a murine model portal.abczdrowie.plWP abcZdrowieportal.abczdrowie.plOpen source ↗. Further research is required to determine whether the identified calcium signaling defect operates similarly in human patients. Medical experts note that patients experiencing symptoms should not discontinue treatment independently, as clinical management options remain available.
