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Biomedical subjects

E Kagan

Publications and source records attributed to E Kagan.

63 records · Page 4Linked to original sources
PubMed1975

Alpha1-antitrypsin deficiency--an association with hepatic malignancy.

A 70-year-old man with homozygous alpha1-antitrypsin deficiency (AATD) (Pi-ZZ phenotype) at tutopsy was found to have a hepatocellular carcinoma and hepatic fibrosis, pulmonary emphysema, and cor pulmonale. Characteristic cytoplasmic inclusion bodies, with identical histochemical and ultrastructural features, were detected in both normal and malignant liver cells. It is suggested that AATD may precede malignancy, since this is the eleventh case report of this association.

Aged↗
PubMed1975

Immunologic studies in patients with recurrent bronchopulmonary infections.

In view of the known association of several different immune deficiency disorders with infections of the respiratory tract, a number of immunologic parameters were investigated in 15 patients with recurrent brochopulmonary infections. The patients' neutrophils all demonstrated normal intracellular killing of Staphylococcus aureus, and responded normally to chemotactic stimuli. Although assays of complement 3c were normal in all patients' sera, defective total hemolytic complement activity was consistently shown in 1 patinets manifested elevated serum immunoglobulin concentrations. Severe alpha1 -antitrypsin deficiency (Pi ZZ phenotype) was discovered in 1 patient. Three patients displayed cutaneous anergy to a battery of skin-test antigens, but lymphocytes from all patients studied responded normally to in vitro phytohemagglutinin stimulation. A "blocking" factor found in the serum of 3 patients suppressed the in bitro transformation of normal Candida-responsive lymphocytes by Candida albicans antigen. "Cold" lymphocytotoxins were detected in the sera of 10 patients, but in only 3 of 19 control sera. Although the significance of these findings is unknown, they may possibly have pathogenetic relevance in a small number of the patients studied.

Adolescent↗
PubMed1975

The immunology of asbestosis.

Forty-one employees with varying degrees of asbestosis have been tested for any alteration in the immunological profile. Of these, twenty-two employees showed evidence of pleural thickening and nineteen parenchymal asbestotic fibrosis. Those employees showing pleural thickening gave a strong reaction to different skin tests and a few of those with a parenchymal asbestotic fibrosis showed depressed cutaneous reactivity. Lymphocytotoxic antibodies were present in the sera of 60% of those with pleural thickening and 94% of those with parenchymal asbestosis. An immunological screening schedule is suggested for those employees who show pleural thickening.

Asbestosis↗
PubMedDate not supplied

Effect of estradiol on accelerated atherosclerosis in rabbit heterotopic aortic allografts.

Migration and proliferation of vascular smooth muscle cells are early and major events in the formation of atherosclerotic lesions. We report on an aorta transplant model in rabbits wherein myointimal proliferation is inhibited by 17-beta-estradiol. The abdominal aortas of outbred white New Zealand rabbits were harvested and allografted to the carotid artery of the recipient. The animals, which were fed either a normal or a high-cholesterol (0.5%) diet, were killed 3 weeks later. The degree of myointimal proliferation was measured with a digitized system attached to a light microscope. The myointimal hyperplasia was expressed as the cross section area of the intima/the area of the intima + the area of the media x 100. Transmission electron micrographs were obtained for all vessels. Intimal thickening was shown mainly to consist of proliferating smooth muscle cells. The cholesterol diet resulted in significantly higher serum total cholesterol levels compared to animals on a normal diet (p < 0.0001) but did not affect serum high-density lipoprotein-cholesterol or serum triglyceride levels. The cholesterol diet was also associated with a greater but not significant amount of intimal thickening. Treatment with 17-beta-estradiol significantly decreased both serum triglyceride concentration (p < 0.05) and myointimal thickening (p < 0.01) in cholesterol-fed animals. Transmission electron microscopy showed that the endothelial cells appeared structurally normal in the estradiol-treated animals. Further, estradiol prevented the appearance of vacuolized macrophages. Thus estradiol may decrease myointimal thickening by preserving the endothelium and preventing macrophage appearance in the intima.(ABSTRACT TRUNCATED AT 250 WORDS)

Animals↗