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Biomedical subjects

R A Good

Publications and source records attributed to R A Good.

At least 1,207 records · Page 67Linked to original sources
PubMed1967

Limited heterogeneity of gamma globulin in hypogammaglobulinemia.

When serums of 11 patients with hypogammaglobulinemia were examined by acrylamide-gel electrophoresis, combined with diffusion analysis, for the gamma chain of immunoglobulin G, the electrophoretic distribution of immunoglobulin G differed from that of normal individuals. The differences consisted of limited heterogeneity and bimodal distributions of the proteins at times. Isolated immunoglobulin G from four of the patients showed similar phenomena. The findings indicate a deficient gene population in these patients.

Agammaglobulinemia↗
PubMed1967

Postthymectomy wasting associated with autoimmune phenomena. I. Antiglobulin-positive anemia in A and C57BL-6 Ks mice.

1. Mice of A and C(57)BL/6 Ks strains, thymectomized at birth acquire wasting disease in 84.1% (A) and 77.1% (C(57)BL/6 Ks) of the cases. There is no sex predelection. 2. Anemia in these animals is characterized by shortened red cell survival and increased fragility to hypotonic salt solutions. Among thymectomized A mice reticulocytosis is absent and extramedullary hematopoiesis is found in the spleen in the presence of bone marrow hypoplasia for the erythroid and lymphocyte series. 3. Positive antiglobulin tests of the red cells were observed in all the thymectomized C(57)BL/6 Ks (7/7) and 71.2% of the A strains (62/87). Normal mice do not show positive Coombs' tests. 4. The globulin coat on the A strain consists of IgM, whereas beta(1C) and IgG are not detectable. By contrast, red cell coats of NZB mice developing spontaneous autoimmune hemolytic anemia show IgM and beta(1C), but these erythrocytes do not react with anti-gamma chain antibodies. Another difference in the globulin coats of the two types of erythrocytes is that the IgM on NZB red cells has available light chain determinants but these are apparently hidden or absent in the case of sensitized erythrocytes. The difference in antibody coating, association with a component of complement in one but not the other, suggests a different mechanism for the immune surface phenomenon in each instance. 5. Anemia in NZB mice is associated with reticulocytosis while that in thymectomized A mice is not. 6. Thymectomy appears to initiate a chain of events leading to a series of autoimmune phenomena which may be due to alteration in host response consequent to loss of thymic tissue and thymic dependent functions or alternatively to infection to which increased susceptibility exists as a result of thymic extirpation.

Anemia, Hemolytic↗
PubMed1967

Light chain distribution in immune deposits on glomeruli of kidneys in human renal disease.

The gammaG-immunoglobulin (IgG) deposited on glomeruli of 32 percutaneous renal biopsies from 30 patients with various forms of renal disease was examined by fluorescent techniques to determine its light chain composition. Serum kappa: lambda light chain ratios were determined on 17 serum samples from 16 of the 30 patients. Glomerular IgG staining with only antikappa antiserum, only antilambda antiserum, and with both antisera was demonstrated. No correlation of serum kappa: lambda light chain ratios with the type or types of light chains demonstrable on the glomeruli was observed. We concluded that the IgG deposited on glomeruli of patients with various forms of renal disease is not a nonspecific sample of the circulating immunoglobulin pool but may well reflect more specific selection, as in the deposition of specific antibody formed against exogenous or endogenous antigens during the development of the renal lesion.

Anti-Glomerular Basement Membrane Disease↗
PubMed1967

In vitro bactericidal capacity of human polymorphonuclear leukocytes: diminished activity in chronic granulomatous disease of childhood.

Diminished bactericidal capacity was found to be characteristic of polymorphonuclear leukocytes (PMN) from five children with the clinical syndrome of granulomatous disease of childhood. The PMN from these children demonstrated nearly normal phagocytic capacity, and the majority of viable bacteria, after 2 hours of incubation in the phagocytosis system, were found associated with leukocytes. The morphology of the unstimulated polymorphonuclear leukocytes from patients with chronic granulomatous disease was similar to those from normal persons of similar ages by light and electron microscopy. In addition, the total lysozyme and phagocytin activity of leukocyte extracts from these patients was similar to those from equal numbers of leukocytes from controls.A striking difference in the cytoplasmic response after phagocytosis characterized the PMN of the patients with granulomatous disease. Whereas degranulation, vacuole formation, and rapid bacterial digestion were the rule in the PMN from controls, little degranulation and persistence of intact bacteria in the cytoplasm characterized disease. The deficiency of bactericidal capacity and the minimal degranulation after active phagocytosis by the PMN of these children with an inherited syndrome suggest that separate metabolic processes are involved in phagocytosis and in intracellular digestion. Continuing study of the metabolic function of leukocytes from these children should provide an opportunity for increased understanding of the metabolic basis for degranulation and intracellular digestion in phagocytic cells.

Bacteria↗
PubMed1967

Studies of the metabolic activity of leukocytes from patients with a genetic abnormality of phagocytic function.

Polymorphonuclear leukocytes from patients with chronic granulomatous disease respond to the phagocytosis of latex particles with normal increments in glucose consumption, lactate production, Krebs' cycle activity, and lipid turnover. The leukocytes of these patients fail to show normal increments in respiration, direct oxidation of glucose, and hydrogen peroxide formation during particle uptake. It appears that the stimulation of respiration with the formation of hydrogen peroxide and stimulation of the direct oxidative pathway of glucose metabolism are closely linked to degranulation and intracellular killing of bacteria by polymorphonuclear leukocytes.

Citric Acid Cycle↗