Chronic Desensitization and Down regulation of the Gastrin releasing Peptide Receptor Are Mediated by a Protein Kinase C dependent Mechanism ScienceDirect The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline IFN and CTLA 4 Drive Hepatic CD4 T Cell Tolerance and Protection From Autoimmunity in Mice Cellular and Molecular Gastroenterology and Hepatology Acquired Glucocorticoid Resistance Due to Homologous Glucocorticoid Receptor Downregulation: A Modern Look at an Age Old Problem