TRYPTOPHAN RELATED SIGNALING MOLECULES: TARGETS AND FUNCTIONS -- TRYPTOPHAN AND CELL DEATH -- TRYPTOPHAN AND NITRIC OXIDE IN ALLERGY.-Tryptophan metabolites: A microbial perspective -- THE ROLE OF L-TRYPTOPHAN KYNURENINE PATHWAY METABOLISM IN VARIOUS INFECTIOUS DISEASES: FOCUS ON INDOLEAMINE 2,3-DIOXYGENASE 1 -- EVALUATION OF TRYPTOPHAN METABOLISM IN CHRONIC IMMUNE ACTIVATION -- DIABETES AND TRYPTOPHAN METABOLISM -- 3-HYDROXYKYNURENIC ACID AND TYPE 2 DIABETES: IMPLICATIONS FOR AGING, OBESITY, DEPRESSION, PARKINSON'S DISEASE AND SCHIZOPHRENIA -- THERAPEUTICAL IMPLICATIONS OF MELATONIN IN ALZHEIMER´S AND PARKINSON´S DISEASES -- TRYPTOPHAN METABOLISM AND SLEEP -- TRYPTOPHAN IN MOLECULAR HEMATOPOIESIS -- NIGHT-SHIFTS AND MELATONIN: RELEVANCE TO AGE AND BREAST CANCER -- CHEMOTHERAPEUTIC AGENTS IN CANCER TREATMENT AND TRYPTOPHAN METABOLISM.-INDOLEAMINE 2,3-DIOXYGENASE-COMPETENT REGULATORY DENDRITIC CELLS AND THEIR ROLE IN ALLOIMMUNE REGULATION AND TRANSPLANT IMMUNE TOLERANCE -- WINE FLAVOR AND TRYPTOPHAN .