Provided herein are peptide inhibitors of the interaction between End Binding Protein 3 (EB3) and Inositol 1,4,5-Trisphosphate Receptor Type 3 (IP3R3). Also provided are methods and materials for treating lung injury, including acute lung injury, which may include hyperpermeability of lung vessels, vascular leakage, the development of edema, asthma, anaphylaxis, angioedema, systemic vascular permeability syndromes, and nasal congestion.