BACKGROUNDBococizumab is a humanized monoclonal antibody that inhibits proprotein convertase subtilisin-kexin type 9 (PCSK9) and reduces levels of low-density lipoprotein (LDL) cholesterol. We sought to evaluate the efficacy of bococizumab in patients at high cardiovascular risk.
METHODSIn two parallel, multinational trials with different entry criteria for LDL cholesterol levels, we randomly assigned the 27,438 patients in the combined trials to receive bococizumab (at a dose of 150 mg) subcutaneously every 2 weeks or placebo. The primary end point was nonfatal myocardial infarction, nonfatal stroke, hospitalization for unstable angina requiring urgent revascularization, or cardiovascular death; 93% of the patients were receiving statin therapy at baseline. The trials were stopped early after the sponsor elected to discontinue the development of bococizumab owing in part to the development of high rates of antidrug antibodies, as seen in data from other studies in the program. The median follow-up was 10 months.
RESULTSAt 14 weeks, patients in the combined trials had a mean change from baseline in LDL cholesterol levels of −56.0% in the bococizumab group and +2.9% in the placebo group, for a between-group difference of -59.0 percentage points (P<0.001) and a median reduction from baseline of 64.2% (P<0.001). In the lower-risk, shorter-duration trial (in which the patients had a baseline LDL cholesterol level of ≥70 mg per deciliter [1.8 mmol per liter] and the median follow-up was 7 months), major cardiovascular events occurred in 173 patients each in the bococizumab group and the placebo group (hazard ratio, 0.99; 95% confidence interval [CI], 0.80 to 1.22; P = 0.94). In the higher-risk, longer-duration trial (in which the patients had a baseline LDL cholesterol level of ≥100 mg per deciliter [2.6 mmol per liter] and the median follow-up was 12 months), major cardiovascular events occurred in 179 and 224 patients, respectively (hazard ratio, 0.79; 95% CI, 0.65 to 0.97; P = 0.02). The hazard ratio for the primary end point in the combined trials was 0.88 (95% CI, 0.76 to 1.02; P = 0.08). Injection-site reactions were more common in the bococizumab group than in the placebo group (10.4% vs.
BackgroundLittle is known about the achievement of low density lipoprotein cholesterol
(LDL-C) targets in patients at cardiovascular risk receiving stable
lipid-lowering therapy (LLT) in countries outside Western Europe.MethodsThis cross-sectional observational study was conducted in 452 centres (August
2015−August 2016) in 18 countries in Eastern Europe, Asia, Africa, the
Middle East and Latin America. Patients (n = 9049) treated
for ≥3 months with any LLT and in whom an LDL-C measurement on stable LLT
was available within the previous 12 months were included.ResultsThe mean±SD age was 60.2 ± 11.7 years, 55.0% of patients were men and the
mean ± SD LDL-C value on LLT was 2.6 ± 1.3 mmol/L (101.0 ± 49.2 mg/dL). At
enrolment, 97.9% of patients were receiving a statin (25.3% on high
intensity treatment). Only 32.1% of the very high risk patients versus 51.9%
of the high risk and 55.7% of the moderate risk patients achieved their
LDL-C goals. On multivariable analysis, factors independently associated
with not achieving LDL-C goals were no (versus lower dose) statin therapy, a
higher (versus lower) dose of statin, statin intolerance, overweight and
obesity, female sex, neurocognitive disorders, level of cardiovascular risk,
LDL-C value unknown at diagnosis, high blood pressure and current smoking.
Diabetes was associated with a lower risk of not achieving LDL-C goals.ConclusionsThese observational data suggest that the achievement of LDL-C goals is
suboptimal in selected countries outside Western Europe. Efforts are needed
to improve the management of patients using combination therapy and/or more
intensive LLTs.
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