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Chymase from human mast cells selectively cleaved big endothelins (ETs) at the Tyr31-Gly32 bond and produced novel trachea-constricting 31-amino acid-length endothelins, ETs(1-31), without any further degradation products. Chymases from other species, such as the enzymes from rat connective tissue and mucosal mast cells, and the other chymotrypsin-like(More)
The ventilatory response to isocapnic progressive hypoxia and hyperoxic progressive hypercapnia in 24 diabetic patients were compared with those of sex and age matched normal control subjects. The heart rate response to hypoxia was also measured in both groups. In diabetic patients the ventilatory and heart rate responses to hypoxia were significantly lower(More)
We report a case of hemopneumothorax secondary to multiple cavitary metastasis in the angiosarcoma of the scalp in an 86-year-old woman, who died of respiratory failure. At autopsy, multiple cavities were found in both lungs. Histologic specimen of the cavitary metastasis of the lung showed that tumor cells proliferated forming several tubular spaces and(More)
Whether or not serum selenium and vitamin E (alpha-tocopherol) concentrations were changed was examined among healthy families of lung cancer patients. Family members as a whole (115 sons and daughters of 55 patients with primary lung cancer) were found to have a trend to lower serum selenium levels (0.116 +/- SD 0.024 microgram/ml, 0.05 less than P less(More)
To evaluate relative contributions of inherent versus extrinsic factors to respiratory chemosensitivity, ventilatory responses to isocapnic progressive hypoxia and normoxic progressive hypercapnia were examined at intervals of 8 to 10 yr in 32 healthy male volunteers aged 42.2 +/- 1.4 yr (SEM) in the final examination. The volunteers included 22 sons of(More)
We have reported that human chymase specifically cleaves big endothelins (ETs) at the Try31-Gly32 bond, and produces novel trachea-constricting 31-amino-acid-length ETs, ETs(1-31). In this study, we investigated the effect of synthetic ETs(1-31) on the contractile activity toward porcine coronary arteries and rat aortae. Although ETs(1-31) exhibited less(More)
To examine possible genetic influence on the sensation of dyspnea and on load compensation, we conducted a twin study using healthy adult pairs (10 monozygotes, MZ, and 9 dizygotes, DZ). The ventilatory response to progressive hypercapnia (HCVR) was examined under three different conditions: hyperoxia (PETO2 > 150 mm Hg), hypoxia (PETO2 maintained at 50 to(More)
The ventilatory response to hypercapnic progressive hypoxia and the breathing pattern during steady-state hypercapnic hypoxia were compared before and after intravenous infusion of 3 mg of naloxone in a relatively large number of healthy adults (n = 21). In addition, the withdrawal response from hypercapnic hypoxia (modified transient O2 test) was measured(More)