Effect of sotagliflozin on major adverse cardiovascular events: a prespecified secondary analysis of the SCORED randomised trial

Background

Sodium–glucose co-transporter (SGLT)-2 inhibitors have shown consistent benefit in improving heart failure-related outcomes but not ischaemic cardiovascular events such as myocardial infarction or stroke. We assessed if the dual SGLT1/2 inhibitor sotagliflozin improves ischaemic outcomes.

Methods

We did a prespecified secondary analysis of the SCORED trial, which was a double-blind, placebo-controlled, randomised clinical trial enrolling patients (aged ≥18 years) with type 2 diabetes, chronic kidney disease (estimated glomerular filtration rate [eGFR] 25–60 mL/min per 1·73 m²), and additional cardiovascular risk factors. Patients at 750 sites in 44 countries were randomly assigned (1:1) to oral sotagliflozin or placebo via an interactive response technology system (block size of four; stratified by heart failure-related criteria and geographical region), with participants, investigators, and study staff, including those who assessed outcomes, masked to group assignment. Sotagliflozin treatment was prescribed at 200 mg once a day, with the dose increased to 400 mg once a day within the first 6 months if tolerated. Matching placebo was prescribed at the same treatment frequency as the intervention regimen. A prespecified secondary outcome was total major adverse cardiovascular events (MACE), which was defined as a composite of cardiovascular death, non-fatal myocardial infarction, and non-fatal stroke, assessed as first and subsequent events. Other outcomes included total myocardial infarction and total stroke (fatal and non-fatal events) as individual post-hoc endpoints. Outcomes were assessed by intention to treat with competing-risk proportional hazard models in the overall population, and, for total MACE, in prespecified subgroups stratified by baseline demographic and clinical features (sex, age, geographical region, heart failure-related criteria, eGFR, urine albumin–creatinine ratio, and cardiovascular disease history). The SCORED trial was registered at ClinicalTrials.gov, NCT03315143, and was ended early due to loss of funding.

Findings

10 584 patients were enrolled and randomly assigned to sotagliflozin (n=5292 [50·0%]) or placebo (n=5292 [50·0%]) between Dec 8, 2017 and Jan 20, 2020 (median age 69 years [IQR 63–74]; 4754 [44·9%] female patients and 5830 [55·1%] male patients). 5144 (48·6%) patients had a history of cardiovascular disease, of whom 2108 (19·9% of the total population) had a history of myocardial infarction, 946 (8·9%) had a history of stroke, and 2375 (22·4%) had a history of coronary revascularisation. Patients in the sotagliflozin group had a significantly lower rate of total MACE than those in the placebo group (4·8 events per 100 person-years vs 6·3 events per 100 person-years; hazard ratio [HR] 0·77 [95% CI 0·65–0·91]; p=0·0020). Interaction analyses suggested a consistent effect of sotagliflozin on total MACE among stratified subgroups without evidence of heterogeneity. Additionally, sotagliflozin significantly reduced the rate of myocardial infarction (1·8 events per 100 person-years vs 2·7 events per 100 person-years; HR 0·68 [0·52–0·89]; p=0·0041) and stroke (1·2 events per 100 person-years vs 1·8 events per 100 person-years; HR 0·66 [0·48–0·91]; p=0·012) compared with placebo.

Interpretation

Sotagliflozin reduced MACE, with independent reductions in myocardial infarction and stroke, among patients with type 2 diabetes, chronic kidney disease, and additional cardiovascular risk. The ischaemic benefit on both myocardial infarction and stroke has not been previously observed with other SGLT inhibitors and warrants investigation of combined SGLT1 and SGLT2 inhibition as a possible underlying mechanism.

Funding

Lexicon Pharmaceuticals.