Thymosin-induced leukocyte histamine release reaction in an infant with DiGeorge syndrome.
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DiGeorge Syndrome↗
Biomedical subjects
A K Bamzai
Publications and source records attributed to A K Bamzai.
Enhancement of antigen-induced leukocyte histamine release by a mononuclear cell--derived factor.
Supernatant fluids of phytohemagglutinin-stimulated mononuclear cells from ragweed-sensitive patients significantly enhanced the release of histamine from antigen-triggered leukocytes of ragweed-sensitive as well as control individuals. Supernatants of mononuclear cells from control individuals did not reveal this enhancing effect, nor was it found with the use of supernatants of unstimulated mononuclear cells of ragweed-sensitive patients or culture media with PHA alone. Supernatant fluids of phytohemagglutinin-stimulated mononuclear cells of patients sensitive to trees and grass also revealed this enhancing effect. The factor(s) responsible for the enhancement of antigen-induced histamine is heat labile and has a molecular weight of less than 10,000 daltons. The mechanism and site of action of the enhancing factor could involve initiating and/or modulating steps of the leukocyte histamine release reaction. This factor, presumably a lymphokine or a monokine, may constitute a regulating link between cell-mediated immunity and histamine-mediated hypersensitivity reactions in allergic patients.
Adolescent↗
Quantitative nitrobluetetrazolium reduction by normal newborn monocytes.
The phagocytosis-induced metabolic burst of human newborn monocytes, as evaluated by their capacity to reduce NBT, was comparable to that of adult monocytes. The NBT reduction assay constitutes a simple method of ascertaining the functional capacity of human monocytes.
Adult↗
Chondrodysplasia punctata. Conradi-Hünermann syndrome.
A 10-day-old girl was examined because of a peculiar, patterned hyperkeratosis that was noted at birth. The lesions were distributed over the trunk and limbs and consisted of whorls and streaks of thick, yellow, adherent scales. The salient histologic feature was marked hyperkeratosis with deep invagination of the dilated pilosebaceous ostia nearly to the level of the hair bulb. Additional physical abnormalities included patchy alopecia, bilateral zonular cataracts, a depressed nasal bridge, small stature, and multiple skeletal deformities. Roentgenograms demonstrated widespread stippled epiphyses characteristic of Conradi-Hünermann syndrome.
Bone and Bones↗