Novel ENV-101 associated with improved lung function in IPF

Efficacy endpoints

An analysis of the secondary efficacy endpoints showed a 1.9% mean improvement in FVC from baseline among patients assigned to ENV-101, compared with a mean decline of 1.3% of patients assigned to placebo (P = .035).

Patients on the active drug also had a 200-mL mean increase in total lung capacity, compared with a mean decline of 56 mL for patients on placebo (P = .005).

In addition, high-resolution CR studies showed a 9.4% absolute decrease from baseline in quantitative interstitial lung disease with ENV-101, vs. a 1.1% increase among controls, a 2% absolute decline from baseline in quantitative lung fibrosis compared with a 0.87% increase with placebo, and a 4.6% absolute decrease from baseline in quantitative ground glass, compared with an increase of 0.29% with placebo.
 

Bad taste a good sign?

Reinoud Gosens PhD, University of Groningen, the Netherlands, who co-moderated the session but was not involved in the study, questioned whether the dysgeusia seen in patients who received ENV-101 might be related to the dysgeusia seen in clinical trials of P2X3 receptor antagonists for cough.

“I was wondering if there would be a mechanistic overlap between Hedgehog inhibition and cough, which would be quite relevant for IPF,” he said in an interview.

The increase in FVC seen with ENV-101 and with the investigational agent buloxibutid, a novel angiotensin II type 2 receptor agonist described in a separate presentation by Dr. Maher, suggests that these drugs may have the ability to help remodel damaged lungs, Dr. Gosens said.

Investigators are currently planning a phase 2 dose-ranging trial (WHISTLE-PF) in patients with IPF or progressive pulmonary fibrosis.

The phase 2a trial was supported by Endeavor BioMedicines. Dr. Maher disclosed consultancy or speaker fees from Endeavor and others. Dr. Gosens had no relevant disclosures.