How far will GRADE go in answering the second-drug question?
On Monday, June 28, results will be presented from the long-awaited Glycemia Reduction Approaches in Diabetes – A Comparative Effectiveness (GRADE) study.
Launched in 2013, the trial is funded by the National Institutes of Health and several pharmaceutical company partners. Over 5,000 patients diagnosed with type 2 diabetes within the prior 10 years and already taking metformin were randomized to one of four commonly used second-line glucose-lowering agents: glimepiride, sitagliptin, liraglutide, and basal insulin glargine. The aim was to determine which combination produced the best glycemic control with the fewest side effects.
Dr. Weinstock said: “Clinicians now have increasing numbers of medications to choose from when treating hyperglycemia in type 2 diabetes, and a common dilemma is which one to select. The results of GRADE should be informative for people taking care of type 2 diabetes in different populations.”
However, she also pointed out that GRADE does not include a group with a sodium-glucose transporter 2 inhibitor, as the trial was designed prior to the availability of the drug class. Now, SGLT2 inhibitors are widely used and recommended for cardiovascular and kidney benefit as well as glucose lowering.
“I believe the future is really precision medicine where we individualize treatment. So, for someone with heart failure you might choose an SGLT2 inhibitor, but there are plenty of other subpopulations. They are going to be looking at different subpopulations. I think we’re all very interested in seeing what the results are, but it’s not the end of the story. We will still have to individualize therapy and keep in mind their kidney, heart, heart failure status, and other factors,” she said.
Dr. Gabbay pointed out that GRADE is important because it’s one of the few comparative effectiveness trials conducted in diabetes. “I think it will be very rich [data] that will impact practice in a variety of ways. On the one hand, it doesn’t do everything we’d want it to do, but on the other hand, if you think of the number of comparative effectiveness trials in diabetes, there are not a lot ... I think it will be big.”
COVID-19 and diabetes: A lot to discuss
In contrast to the ADA scientific sessions in 2020, which took place too soon after the start of the COVID-19 pandemic to include much material about it, this year’s meeting will address many different aspects of the novel coronavirus.
Sessions will cover minimizing risk in people with diabetes during the pandemic, the latest data on whether COVID-19 triggers diabetes, and if so, by what mechanism, mental health issues related to COVID-19, as well as the management of foot care, pregnancy, and the pediatric population during the pandemic.
On Sunday, June 27, a symposium will be devoted to results of the DARE-19 trial, which explored the effects of the SGLT2 inhibitor dapagliflozin in more than 1200 patients hospitalized with COVID-19. The overall results, presented in May 2021 at the scientific sessions of the American College of Cardiology, showed a nonsignificant trend for benefit in time to organ failure or death compared with placebo. At ADA, separate efficacy and safety results for patients with and without diabetes will be presented.
According to Dr. Weinstock, “We know that in nonhospitalized patients with type 2 diabetes the SGLT2 inhibitors can help preserve kidney function and reduce heart failure. But we also know there can be diabetic ketoacidosis and genital infections and other side effects, so it’s been unclear up till now in type 2 diabetes whether they are safe and effective in people hospitalized in respiratory failure with COVID-19. And, given that people with type 2 diabetes and COVID-19 are more likely to require mechanical ventilation and are at greater risk of mortality, we’re anxious to see what these results are.”
Dr. Gabbay commented that, when the DARE study was initiated in April 2020, there were concerns about whether it was safe. And even now, “we’re still not sure about whether SGLT2 inhibitors should be stopped in hospitalized patients. The recommendations say to stop. I think this will be interesting.”
Also to be addressed in several meeting sessions are related issues the pandemic has brought forth, such as the use of telehealth for routine diabetes management, inpatient use of continuous glucose monitoring, and, of course, health care disparities.
“A lot of important issues related to COVID-19 of great interest will be discussed in a variety of sessions,” Dr. Weinstock said.