Possible reasons for the early response
The reasons for the higher response to both placebo and biologics for patients with early CD are unknown.
“It may be that there is plasticity in Crohn’s disease early in the course of disease, where the tissue is more amenable to return to normal whether the patient is on placebo or treatment,” said Dr. Ben-Horin.
He suspects that the more likely explanation is that the placebo response is higher in patients with CD of short duration.
“When we looked at levels of C-reactive protein, this was reduced by biologics at similar magnitude in early- and late-disease patients,” Dr. Ben-Horin said. He noted that more studies are needed to better understand disease dynamics with these conditions.
Commenting on the findings, Stephen B. Hanauer, MD, from Northwestern University Feinberg School of Medicine, Chicago, noted that they “absolutely support earlier intervention for moderate-severe Crohn’s disease from diagnosis, rather than waiting for transmural progression that will make disease more refractory to any mechanism of action.”
“Unfortunately, the average duration of disease in biologic trials is often close to 10 years, which implies a more refractory population,” Dr. Hanauer said.
“Furthermore, in the United States, clinicians and patients are hampered by inability to gain third-party authorization for biologics or advanced oral agents, such as JAK inhibitors or S1P modulators, until failure of so-called conventional agents despite labeling indication for moderate-severe disease,” he added.
Dr. Ben-Horin has received consultancy and/or advisory board fees from AbbVie, Novartis, Schering-Plough, Janssen, Celltrion, GSK, Pfizer, Galmed, and Takeda and research support from AbbVie, Janssen, Celltrion, Galmed, and Takeda. Dr. Hanauer is a consultant and speaker for AbbVie, Janssen, and Takeda.
A version of this article first appeared on Medscape.com.