ISS—International Space Station

MC—Mast cell

LEO—Low Earth Orbit

ECM—Extracellular matrix

PAR-2—Protease-activated receptor-2

VEGF—Vascular endothelial growth factor

VIP—Vasoactive intestinal peptide

SP—Substance P

ICAM-1—Intercellular adhesion molecule 1

MMPs—Metalloproteinases