The purpose of this study is to evaluate the efficacy and safety of SYH2053 monotherapy in patients with primary hypercholesterolemia (non-familial) or mixed dyslipidemia .
This trial plans to enroll 760 Participants.
、Age ≥18 years (inclusive);
、Fasting serum low-density lipoprotein cholesterol (LDL-C) levels failing to meet the target criteria at screening and prior to randomization (based on local laboratory results). Any one of the following conditions satisfies the criterion(according to the 2023 Chinese Guidelines for Lipid Management):① Low risk: LDL-C ≥130 mg/dL（3.4 mmol/L）and LDL-C<188 mg/dL（4.9 mmol/L）; ②Moderate risk: LDL-C ≥ 100 mg/dL (2.6 mmol/L) and LDL-C<188 mg/dL（4.9 mmol/L）; 3、At screening (based on local laboratory results), Fasting serum Triglyceride (TG)<500 mg/dL（5.6 mmol/L） 4、Participants are able to establish good communication with the investigator and complete the trial in accordance with the protocol.
Prior diagnosis of familial hypercholesterolemia; or a history of the following diseases: Cushing's syndrome, nephrotic syndrome, myeloma, glycogen storage disease, systemic lupus erythematosus, acute intermittent porphyria, cirrhosis, severe biliary obstruction, or other diseases known to significantly cause dyslipidemia；
A documented history of established atherosclerotic cardiovascular disease (ASCVD), defined as a history of: acute coronary syndrome (myocardial infarction or unstable angina), chronic coronary syndrome, or prior coronary revascularization (e.g., PCI or CABG); ischemic stroke or transient ischemic attack (TIA); or significant peripheral artery disease (PAD). PAD includes conditions such as chronic limb-threatening ischemia, acute limb ischemia, or atherosclerotic disease in other major arteries (e.g., carotid, vertebral, subclavian, renal, or mesenteric arteries)；
Treatment with short-acting lipid-lowering therapies (e.g., statins, fibrates, bempedoic acid, ezetimibe, bile acid sequestrants, niacin, omega-3 fatty acids) or any preparation of unknown composition with lipid-lowering intent (including over-the-counter, traditional, or herbal medicines) within 90 days prior to screening; or treatment with PCSK9 monoclonal antibodies or oral PCSK9 inhibitors within the past 180 days before screening or treatment with inclisiran or any other RNA-based lipid-lowering therapy (e.g., siRNA, antisense oligonucleotide) within the past 2 years before screening;
History of malignancy within 5 years (excluding treated basal cell carcinoma of the skin), or presence of a suspected malignancy currently being evaluated by the investigator;
Parallel
SYH2053 injection
DrugParticipants receive SYH2053 injection by subcutaneous administration.
SYH2053 injection placebo
Other interventionParticipants receive SYH2053 injection placebo by subcutaneous administration.
Percentage change in LDL-C relative to baseline
The value of change in LDL-C relative to baseline
Time adjusted percent change in LDL-C levels from baseline between Day 90 and Day 360 levels
Incidence and severity of adverse events (AE), serious adverse events (SAE), etc. Description:
Number of ADA and Nab
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