15 резултати
Secondary cultures of embryonic rat fibroblasts incubated in Eagle medium with Hepes buffer at pH 6.6 and 7.4 were maintained in hypoxia of 1% O2 for 48 hours. The acid mucopolysaccharides were isolated from medium plus cells and fractionated on cellulose microcolumns according to SVEJCAR and
The influence of 5% O2 hypoxia on the 35S-sulfate incorporation into different mucopolysaccharide fractions was studied in monolayer cultures of embryonic rat fibroblasts before reaching the stationary phase. Besides the O2 concentration also the pH value and lactate concentration were varied in the
Secondary cultures of embryonic rat fibroblasts [NEUPERT et al., Exp. Path. 7, 19-28 (1972)] were cultured in 21% and 5% O2 concentration at pH 6.6 and 7.4 for 6 or 8 days. The acid mucopolysaccharides were isolated and fractionated by alcohol precipitation, papain digestion, CPC-precipitation and
Chronic intermittent hypoxia (CIH) is a major determinant of the cardiovascular morbidity associated with obstructive sleep apnoea (OSA), and the magnitude of CIH impact may be influenced by ageing. Here, we assessed the role of ageing in the early cardiovascular structural remodelling In secondary cultures of rat embryonic fibroblasts the glucose consumption and lactate concentration were comparatively investigated in 5 and 21 Vol.-% O2 environment at pH 6.6 and pH 7.4 (HEPES-buffer). The results were correlated with cell density. The following observations were made: 1. At pH
Histochemical methods were applied to determination of salomycin, dermatansulfate, keratosulfate and neutral mucopolysaccharides in the goblet cells of rabbit appendix. Sialomycin and neutral mucopolysaccharides were found in the glands. Immunization with human gamma globulin was followed in the
This is a report of a 45-yr-old male patient who developed central sleep apnea syndrome because of hypothyroidism. In response to L-thyroxine therapy, the patient became euthyroid, and the apneic phenomenon disappeared. Previous reports have suggested that hypothyroidism can produce obstructive
An 18-year-old student presented with a two-year history of daytime sleepiness and noisy breathing during sleep. Both he and his brother, aged 25 years, had Scheie's syndrome, a mucopolysaccharidosis characterised by small stature, micrognathia, corneal clouding, hepatosplenomegaly, raised urinary
Increased pulmonary blood flow was produced in 1-month-old piglets by means of left pneumonectomy, arteriovenous fistulas in the neck, and a combination of both. Physiologic and histologic studies of the pulmonary vascular bed were done 1-9 months after operation. A progressive, moderate increase in
OBJECTIVE
This study was undertaken to examine the effects of chronic embolization of the umbilical circulation during late gestation on regional concentrations of quinolinic acid and kynurenic acid (neuroactive products of tryptophan catabolism) and of the astrocyte-associated glial fibrillary
Previous oxygen microelectrode studies have shown that the oxygen diffusion coefficient (DO₂) increases during extracellular PO₂ decreases, while intracellular PO₂ remained unchanged and thus cell function (spike activity of neurons). Oxygen dependency of complex multicellular organisms requires a
Ten infants and children suffering from Thalassaemia major, proven by clinical, hematological and biochemical criteria, were subjected to intestinal biopsy. Specimens were studied for histological and histochemical patterns. The histological picture showed shortening and fusion of villi with