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BACKGROUND We have previously reported that by means of a breath test with intravenously administered L-[1-13C] phenylalanine (13Cphe), hepatopathy could be quantitatively evaluated by measuring expiratory 13CO2 levels in a short period. It is known that phenylalanine hydroxylase activity (PAHA) plays an important role in phenylalanine metabolism. We(More)
OBJECTIVE Compared with healthy individuals, patients with chronic liver disease reportedly have lower L-[1-13C] phenylalanine breath test (PBT) values. However, there is no report detailing the relationship between the results of PBT and pathological data in liver disease patients. This study was designed to investigate the degree of histological changes(More)
OBJECTIVE Impaired butyrate metabolism plays a part in ulcerative colitis (UC). To assess the usefulness of measuring butyrate metabolism as an indication of inflammatory activity, we investigated the rate of butyrate metabolism by breath test after administering [1-(13)C]-butyrate rectally to patients with UC. MATERIAL AND METHODS Thirty-eight UC(More)
We report an 81-year-old man and a 65-year-old woman with a solitary pulmonary nodule (SPN) due to infection with non-tuberculous mycobacteria (NTM). In each case, the nodule showed a high (18)F-fluorodeoxyglucose (FDG) uptake with the maximum standardized uptake values (SUV) of 13.2 and 4.8 on positron emission tomography (PET) imaging, respectively. Both(More)
OBJECTIVES We investigated whether a breath test using benzoyl-L-tyrosyl-[1-(13)C]alanine (Bz-Tyr-Ala) allows assessment of pancreatic exocrine function. METHODS Benzoyl-L-tyrosyl-[1-(13)C]alanine was orally administered, and changes in (13)CO2 were expressed as delta per thousand. The breath test was performed in chronic pancreatitis patients and healthy(More)
A simple breath test was developed for assessment of exocrine pancreatic function employing 13C-dipeptide [ie, benzoyl-L-tyrosyl-[1-(13)C]alanine (Bz-Tyr-Ala)], and this test was examined to determine whether it can be used to diagnose exocrine pancreatic insufficiency in patients with chronic pancreatitis. The subjects, 24 patients with chronic(More)
OBJECT The purpose of this study was to perform L-[1-13C] phenylalanine breath test (PBT), measure phenylalanine hydroxylase (PAH) activity in liver tissue biopsies from patients, analyze the relationship between PBT results and PAH activity, and determine the time point at which measurements best reflect PAH activity in liver tissue. METHODS PBT was(More)
Compared to healthy subjects, patients with severe liver cirrhosis (LC) are reported to show lower values in the L-[1-(13)C] phenylalanine breath test (PBT). We performed this test several times during the clinical course in two patients with severe liver cirrhosis (LC). Patient 1 was a 67-year-old woman with non-B, non-C LC and hepatocellular carcinoma(More)