The subject invention provides a pharmaceutical composition comprising N-ethyl-N-phenyl-1,2,-dihydro-4-hydroxy-5-chloro-1-methyl-2-oxoquinoline-3-carboxamide or the salt thereof; a pharmaceutically acceptable carrier; and not more than 0. The invention also relates to antibodies directed against the polypeptide and the use of said polypeptide in the mediation of cell permeability to substances. The slot antenna receives communication signals from an interrogation reader or other communication device.