Apeptico Forschung und Entwicklung GmbH (Vienna, Austria) said orally inhaled AP301 led to earlier onset and "more pronounced activation" of pulmonary edema clearance vs. placebo in a Phase IIa trial to treat pulmonary permeability edema in mechanically-ventilated patients with acute respiratory distress syndrome (ARDS). Apeptico could not be reached for details or next steps, but said the data will "establish partnering process." AP301 is a human tumor necrosis factor (TNF) alpha-derived peptide that activates the pulmonary epithelial sodium channel (ENaC).