7 Tesla MRI Study in Patients With Statin Related Muscle Complaints

The University of Texas System (UT)

Status: Completed

Conditions: Muscle Aches; Muscle Weakness; Muscle Cramp; Muscle Stiffness; Statin-related Muscle Pain

Treatments: Drug: Simvastatin

Study type: Interventional

Funder types: Other

Identifiers

NCT04575090

STU 012016-017

Details and patient eligibility

About

Roughly 5-10% of statin-treated patients report muscle pain, aches, weakness, cramps, stiffness, or "heaviness" - typically occurring symmetrically in the legs. For healthcare providers, the major diagnostic challenge is to unambiguously link these symptoms to statin use, especially since some patients can have normal serum creatine kinase (CK) levels despite demonstrable weakness and muscle biopsy proven statin-induced myopathy .

No well accepted, standardized, or Food and Drug Administration (FDA)-endorsed diagnostic method exists for statin-induced muscle injury. This lack of an objective diagnostic methodology blocks vertical advancement of the field.

The successful completion of this project will develop in vivo techniques that will provide insight into how statins affect muscle metabolism and help establish a methodology to objectively diagnose muscle injury due to statins. The development of an MRS technique will allow for in-vivo analyses and the data accumulated here will serve as preliminary data for futher extramural funding of studies with much larger sample sizes. Ultimately, this focus of research will lead to improved diagnosis and treatment of patients with statin-related muscle complaints, which is central to obtaining the cardiovascular risk reduction from lipid-lowering drugs.

Full description

The goal of the first study will be to generate hypothesis regarding the long-term effects of statin in muscles by studying 7T MRS findings in patients who are currently experiencing statin-related muscle complaints or who have a history of severe reactions to statins (i.e. rhabdomyolysis, anti-HMGCR-associated autoimmune myopathy, or CK elevation > 10 times the upper limit of normal). We anticipate enrolling roughly 5 such patients. The protocol involves a single visit for a blood draw and MRS of calf muscle. The data will be compared to historical controls provided by the Advanced Imaging Research Center.

Second, we will study the effect of short-term statin administration in 5 patients with a history of statin related muscle complaints and 5 controls with no statin related muscle complaints . Controls will be matched for age, weight, and body mass index. Patients will undergo a wash-out of lipid lowering drugs followed by a challenge with simvastatin 40 mg daily (similar to a statin withdrawal and rechallenge). We chose simvastatin since it is the most common statin that caused myopathy according to our preliminary data (as well as most other published reports). Each patient will have 5 visits. The screening visit will involve a review of inclusion/exclusion criteria, blood draw, questionnaire, and instructions to withhold all lipid lowering drugs until visit 1. Any patient with known antibodies to HMGCR will be excluded from the remainder of the study.

Visit 1 will occur 2 weeks after stopping all lipid lowering drugs. A minimum 2 week period off lipid lowering drugs is required to allow clearance of any medication from the systemic circulation. Patients will undergo MRS of the calf muscle and a blood draw. Patients will then start simvastatin 40 mg daily.

Enrollment: 8 patients

Sex: All

Ages: 18 to 80 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

Adults age >18 yrs or <80 yrs Patients reporting complaints of statin-associated muscle symptoms, aches, weakness, cramps, or stiffness of legs.

Exclusion criteria

Patients who drink large quantities of grapefruit juice (>1 quart daily)

Trial design

Primary purpose: Diagnostic

Allocation: Non-Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

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8 participants in 3 patient groups

Arm 1 (Observational Arm)

No Intervention group

Description:

Patients in substudy 1 will be identified by the PI from the clinic as individuals who are currently experiencing statin related muscle complaints or who have had severe reactions to statins in the past. There is going to be only one visit which will last for apprximately 3.5 hrs. Subjects will have height, weight and vitals measured. They will be asked pain and and demographic questionnaire. They will have their blood draw and will undergo MRS.

Arm 2 (Interventional Experimental Arm)

Experimental group

Description:

Subjects with statin related muscle complaints were enrolled in this arm and will have 3 visits. First visit is screening visit which will last for about 2 hrs and the next 2 visits will last for about 3.5 hrs. The screening visit will occur 2 weeks prior to visit 1. Subjects will have height, weight and vitals measured. They will be asked pain and and demographic questionnaire. They will have their blood draw and will undergo MRS. Some volunteers who do/do not regularly exercise or are/are not active in sports may be asked to exercise prior to the MRS. This exercise may be in the form of hand grasps, toe-raises, bicycling on a stationary bike or walking on a treadmill. Exercise will be limited to up to one hour, during which time the subject's vital signs and blood oxygenation will be monitored. During the scan, the subject's heart rate and respiratory rate may be monitored

Treatment:

Drug: Simvastatin

Arm 3 (Interventional Control Arm)

Experimental group

Description:

Subjects with no statin related muscle complaints were enrolled in this arm and will have 3 visits. First visit is screening visit which will last for about 2 hrs and the next 2 visits will last for about 3.5 hrs. The screening visit will occur 2 weeks prior to visit 1. Subjects will have height, weight and vitals measured. They will be asked pain and and demographic questionnaire. They will have their blood draw and will undergo MRS. Some volunteers who do/do not regularly exercise or are/are not active in sports may be asked to exercise prior to the MRS. This exercise may be in the form of hand grasps, toe-raises, bicycling on a stationary bike or walking on a treadmill. Exercise will be limited to up to one hour, during which time the subject's vital signs and blood oxygenation will be monitored. During the scan, the subject's heart rate and respiratory rate may be monitored

Treatment:

Drug: Simvastatin