More biologics coming for nr-AxSpA
In order to gain an indication for treatment of nr-axSpA, the FDA requires completion of a 52-week, randomized, placebo-controlled clinical trial. That’s what UCB did with the company’s TNF inhibitor, certolizumab. Similarly, Eli Lilly sprang for the mandated 52-week trial in 303 nr-axSpA patients for its interleukin-17 inhibitor ixekizumab (Taltz), with positive findings (Lancet. 2020 Jan 4;395[10217]:53-64). And Novartis has done so with its IL-17 inhibitor secukinumab (Cosentyx) in the 555-patient PREVENT trial, again with positive outcomes. So the two IL-17 inhibitors, which are already approved for AS, are seemingly a lock for approval in nr-axSpA as well.
Will the makers of other TNF inhibitors already approved for AS fork over the considerable money entailed in a 52-week randomized trial, or will they ride on certolizumab’s coattails? Dr. Ruderman said he doesn’t know the answer, but it’s certain that, if they don’t complete the trial, they can’t market their biologic for nr-axSpA in the United States, even though there might well be a drug class effect at work.
ACR/SAA/SPARTAN guidelines critiqued
The two panelists had plenty to say about the 2019 update of the guidelines, none of it favorable. Among their criticisms: The guidelines are already out of date several months after their release, they are based heavily on opinion rather than on evidence, they appear to take medication cost into consideration when they’re not supposed to, they are complicated, and they are just not practical or useful.
“I don’t know when these guidelines would potentially be used,” Dr. Kavanaugh commented in response to an audience question.
Specifically, the guidelines strongly recommend a TNF inhibitor over the IL-17 inhibitors secukinumab or ixekizumab as the first-line biologic in AS patients with active disease while on NSAIDs, guidance that is already out of date.
“You’d almost think it would have been better just to wait a few months to see the published literature, which I think is going to have a tremendous impact on practice,” Dr. Kavanaugh said.
He also said he was troubled by the strong recommendation against switching to a TNF inhibitor–biosimilar after receiving treatment with an originator TNF inhibitor. That’s something rheumatologists all across Europe are routinely doing now for economic reasons without known harm, with the caveat that patients must be switched to a biosimilar of a different TNF inhibitor than the originator.
“There’s absolutely no data to support a recommendation against switching. I think they’re going out on a limb a little bit,” he added.
Dr. Ruderman said he struggles with the guideline development methodology, which involves posing a series of key questions at the outset, with a strict charge to provide answers.
“They always have to have an answer to the question. And in the event that there’s no data to support an answer, then it becomes a matter of the expert opinion of the people on the committee. I think many rheumatologists would say, ‘Why are they any more expert than a clinical rheumatologist who’s been seeing AS patients for 20 years?’ And the answer is they’re probably not. The fact that most of these are conditional recommendations, meaning they’re not supported by strong evidence, makes them less useful,” according to Dr. Ruderman.
Both he and Dr. Kavanaugh reported receiving research funding from and/or serving as a consultant to numerous pharmaceutical companies.