The human monoclonal antibody golimumab (Simponi) preserved endogenous insulin secretion in patients with new-onset type 1 diabetes and reduced their exogenous insulin requirements at 1 year, newly published phase 2 data indicate.
Results from the multicenter, double-blind, placebo-controlled trial were first reported as a poster at the virtual American Diabetes Association 80th Scientific Sessions in June. They were published online Nov. 18 in the New England Journal of Medicine.
In the 52-week study of 84 children and adults with new-onset type 1 diabetes, those given golimumab injections every 2 weeks had significantly higher levels of C-peptide, a marker of insulin secretion, and required less injected or infused insulin than did those who received placebo injections. There were no treatment-associated serious adverse events.
Golimumab is a human monoclonal antibody specific for tumor necrosis factor–alpha. It is approved for the treatment of several autoimmune diseases, including rheumatoid arthritis and ulcerative colitis, in the United States, Europe, and elsewhere.
An intermediate step toward a cure
Although none of the patients were able to stop taking insulin entirely, the results have important clinical implications, lead author Teresa Quattrin, MD, said in an interview.
“People want a cure, but the fact is, a cure is not available yet. So, this is an intermediate step towards a cure.... There are advantages to being on a small insulin dose,” including lower rates of hypoglycemia and maintenance of intraportal insulin, said Dr. Quattrin, of the State University of New York at Buffalo.
But in an accompanying editorial, Domenico Accili, MD, points to potential risks from immunotherapy and from attempting additional interventions at an “emotionally fraught” time when patients and families are coping with the new diabetes diagnosis.
He said of golimumab, “the effect is actually very small. ... There’s nothing wrong in and of itself with improving those outcomes. I just wouldn’t assign them as game changers.”
If this or a similar immunotherapeutic intervention were approved for this indication, “I would tell patients it exists and let them make the decision whether they want to try it. I wouldn’t say you must try it,” said Dr. Accili, of the Columbia University Diabetes and Endocrinology Research Center, New York.
With golimumab, higher C-peptide, lower insulin requirement
Of the 84 patients, who ranged in age from 6 to 21 years, 56 were randomly assigned within 100 days of being diagnosed with type 1 diabetes to receive golimumab, and 28 were assigned to receive placebo injections, given every 2 weeks.
The drug resulted in lower insulin use (0.51U/Kg per day vs. 0.69 U/kg per day), and the increase in insulin use over 52 weeks was less with golimumab than with placebo (0.07 vs. 0.24 U/kg per day; P = .001).
The mean percent decrease of C-peptide production from baseline was 12% with golimumab versus 56% with placebo.
Although the mean number of overall hypoglycemic events was similar, the mean number of level 2 hypoglycemic events (<54 mg/dL) was 36% lower with golimumab (11.5 vs. 17.6). There were no severe cases of hypoglycemia in either group.
No severe or serious infections occurred in either group, although mild to moderate infections were reported in 71% with golimumab versus 61% with placebo. More patients in the golimumab group experienced a decrease in neutrophils (29% vs. 19%).