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N V Dimitrov

Publications and source records attributed to N V Dimitrov.

At least 73 records · Page 4Linked to original sources
PubMedDate not supplied

The effect of selenium on phagocytosis in humans.

The effect of selenium on immune responses in animals and humans is controversial. It has been reported that phagocytosis as a part of the immune function is affected by selenium deficiency. We conducted a study to investigate the effect of selenium on the phagocytic function of polymorphonuclear leukocytes (PMNs) in normal healthy individuals before and after selenium supplementation. Ingestion of sodium selenite 400 micrograms/day (182.8 micrograms pure selenium) resulted in a significant increase in plasma selenium levels. The phagocytic function of PMNs was measured by ingestion of Oil Red O paraffin droplets and chemiluminescence tests. The phagocytic function was increased, but the results before and after selenium supplementation were not significant. It was concluded that inorganic selenium was not an efficient stimulating agent of phagocytosis in humans.

Humans↗
PubMedDate not supplied

Interferon as a modifier of estrogen receptors.

Interferon (IFN-alpha) increased estrogen receptor (ER) activity in human breast cancer tissue, human uterus (endometrium), and rabbit uterus. The optimum response was obtained with three different doses of IFN-alpha 10, 100, and 1000 U per ml. Escalation of the dose up to 5000 U per ml did not increase further ER activity. Cytosol fractions with zero or low binding activity (below 10 fm per mg) did not respond to IFN-alpha treatment. Addition of antibodies against IFN-alpha resulted in abrogation of IFN-alpha effect. Use of recombinant IFN-alpha or highly purified lymphoblastoid IFN-alpha showed similar effects on ER. The mechanism of the augmentation effect of ER activity by IFN-alpha is not clear. The increase of ER activity may have important clinical applications if the same is obtained in vivo.

Animals↗