PubMed Health⌕ Search

Biomedical subjects

F Belleville

Publications and source records attributed to F Belleville.

82 records · Page 5Linked to original sources
PubMedDate not supplied

Relationship of trace element, immunological markers, and HIV1 infection progression.

Trace elements (selenium, zinc, copper), beta 2 microglobulin levels, CD4, and CD8 cell counts have been determined in 80 HIV1 seropositive patients. The study group consisted of 19 females and 61 males with age mean of 35 +/- 10 yr, at stage IV of infection (CDC--Atlanta classification) and treated by AZT. No severe renal or liver diseases or hypoalbuminemia were observed in this group. Se values were significantly lower than in normal adults, 48.3 +/- 17 micrograms/L vs 71 +/- 12 micrograms/L; Zn was moderately diminished, 1 +/- 0.2 mg/L vs 1.2 +/- 0.2 mg/L, whereas copper values were in the normal range, 1.2 +/- 0.3 mg/L vs 1.1 +/- 0.5 mg/L. Se or Zn deficiency was found in 60 and 30 subjects, respectively. Blood Se and Zn decreases were associated in 23 patients. Moreover, all patients showed higher beta 2 microglobulin values than the upper normal limit of 2.4 mg/L. Negative correlations were found between Zn and beta 2 microglobulin (p < 0.005) and between Se and beta 2 microglobulin (p < 0.05). Moreover, there was a positive correlation between Se and Zn values (p < 0.05). Nineteen subjects died 1 yr later (group I), and 61 remained alive (group II). With respect to the clinical evolution, a significant difference between both groups was found in Se and beta 2 microglobulin levels as well as in CD4 cell counts. The correlations previously observed persisted in group II, whereas no correlation was noted in group I. In addition, the patients of group one had significantly lower Se values, which were below 30 micrograms/L in 10 cases.(ABSTRACT TRUNCATED AT 250 WORDS)

Acquired Immunodeficiency Syndrome↗
PubMedDate not supplied

Comparison of metabolism of hybridoma cells cultured in media supplemented with whey or fetal calf serum.

The effects of industrial whey on cell physiology were studied in a repeated fed-harvest mode using free-suspended murine hybridoma cells. After several days of culture in medium containing 9% whey and 1% fetal calf serum (FCS), cell growth and viability, carbohydrate, amino acid, energy metabolism, and antibody production rates were investigated. Differences were found between cells cultured in whey medium and those cultured in conventional FCS medium. The cell growth obtained in medium supplemented with fresh whey was similar to that obtained in FCS medium. The viability showed an increase for hybridoma cells cultured in whey medium. Glucose consumption rates were similar, whereas the lactate production rate was higher in whey medium. The metabolic uptake rates of glutamine and ammonia increased in whey medium. More alanine, glutamate, glycine, and proline were produced; their production partly came from glutamine and lactate. The consumption rates of branched amino acids changed little; their utilization was higher in whey medium. Finally, antibody productivity was increased about 20% for cells cultured in medium containing whey.

Animals↗
PubMedDate not supplied

[Glutathione peroxidases: value of their determination in clinical biology].

The role of glutathione peroxidase in the oxidative metabolism and recent advances in the demonstration of the consequences of the desequilibrium in the proxidant/antioxidant balance on biological molecules oxidation, intracellular signals transduction, apoptosis and necrosis, have led to new approach in the knowledge of many pathological processes. Methods for determining antioxidant capacity have been developed. The measurement of glutathione peroxidase activity is a key step in the study of oxidative stress. Its determination in clinical biology needs optimal conditions for standardised assays which will be used for epidemiological studies aimed to evaluate the role of nutritional factors involved in the pathogeny of diseases caused or accompanied by oxidative stress.

Adolescent↗