scholarly journals THE ENHANCING EFFECT OF URETHANE ON THE SEVERITY OF INFECTION WITH PNEUMONIA VIRUS OF MICE (PVM)

1952 ◽  
Vol 95 (2) ◽  
pp. 147-158 ◽  
Author(s):  
George S. Mirick ◽  
J. MacLean Smith ◽  
Charles I. Leftwich ◽  
William B. Leftwich
Keyword(s):  
Antibody Formation ◽  
Lymphoid Tissues ◽  
Enhancing Effect

Urethane, given parenterally or orally to mice, increased the severity of PVM infection. Not only were the lesions more extensive but mice could be infected with smaller inocula of virus and the multiplication of virus in the lung was enhanced. There was atrophy of lymphoid tissues but no suppression was noted of antibody formation. No relation could be found between PVM infection and the development of pulmonary adenomas in mice.

Method for detecting antibody formation to Neisseria gonorrhoeae

1975 ◽  
Vol 21 (12) ◽  
pp. 1952-1959
Author(s):  
James F. Pribnow ◽  
Joan M. Hall ◽  
Diana J. Besemer ◽  
Neylan A. Vedros
Keyword(s):  
Neisseria Gonorrhoeae ◽  
Concanavalin A ◽  
Antibody Formation ◽  
Plaque Assay ◽  
Lymphoid Tissues ◽  
Serum Samples ◽  
Sheep Erythrocytes ◽  
Alkaline Extract ◽  
Draining Lymph Nodes

The use of Concanavalin A as a coupling agent for sensitization of sheep erythrocytes with an alkaline extract of Neisseria gonorrhoeae organisms is described in this paper. The sensitized erythrocytes were used in a plaque assay for enumeration of antibody-producing cells and in hemagglutination and hemolysin tests for determination of serum antibody.Rabbits were immunized intraperitoneally, intravenously, or via the footpad with viable N. gonorrhoeae organisms. Plaque-forming cells were found in draining lymph nodes and in the spleens of these rabbits. The cells from some rabbits also lysed sheep erythrocytes coated with an alkaline extract prepared from Neisseria meningitidis organisms. No antibody-producing cells were found in the lymphoid tissues of normal rabbits.Rabbits immunized by all three routes developed high hemagglutination and hemolysin titers. Hemolysin titers were significantly higher than hemagglutination titers when both tests were performed on the same serum samples. Pooled antiserum from these rabbits also lysed erythrocytes coated with a meningococcal antigen, but titers for the specific immunizing species were higher.

scholarly journals ENHANCEMENT OF ANTIBODY FORMATION BY WHOLE BODY X-RADIATION

1963 ◽  
Vol 117 (5) ◽  
pp. 833-848 ◽  
Author(s):  
Frank J. Dixon ◽  
Patricia J. McConahey
Keyword(s):  
Antibody Response ◽  
Antibody Formation ◽  
Antigenic Stimulation ◽  
Whole Body ◽  
Lymphoid Tissues ◽  
Physical Form

Enhancement and acceleration of the antibody response can be achieved in some situations with large, cytotoxic doses of whole body x-radiation given after antigenic stimulation. The timing of radiation is critical and varies with the kind and physical form of the antigen. It is postulated that the x-radiation depletes the cells of the lymphoid tissues just prior to the rapid proliferation of the antigen stimulated cells. In this situation those surviving cells which are stimulated by antigen multiply more rapidly than their non-stimulated counterparts and disproportionately repopulate the depleted lymphoid tissues. Whether the x-radiation produces other effects contributing to the multiplication of the antibody forming cells was not determined. It appears that x-radiation produces its enhancement of antibody formation by means different from those operating in endotoxin and colchicine induced enhancement.

Fine Structural Alterations in Thyroid Follicular Cells (FC) and Changes in Serum Thyroxine Produced by Feeding Polychlorinated Biphenyl (PCB) to Rats

1977 ◽  
Vol 35 ◽  
pp. 498-499
Author(s):  
W.T. Collins ◽  
Charles C. Capen ◽  
Louis Kasza
Keyword(s):  
Feed Efficiency ◽  
Polychlorinated Biphenyl ◽  
Serum Proteins ◽  
Skin Lesions ◽  
Hepatic Necrosis ◽  
Ultrastructural Changes ◽  
Lymphoid Tissues ◽  
Heat Transfer Fluids ◽  
Thyroid Follicular Cells ◽  
Peripheral Metabolism

The widespread contamination of the environment with PCB, a compound used extensively by industry in hydraulic and heat transfer fluids as well as plasticizers and solvents in adhesives and sealants, has resulted in detectable tissue levels in a large portion of the human population, domestic animals, and wildlife. Intoxication with PCB produces severe hepatic necrosis, degeneration of lymphoid tissues and kidney, skin lesions, decreased reproductive performance, reduced feed efficiency, and decreased weight gain. PCB also has been reported to reduce the binding of thyroid hormone to serum proteins and enhance the peripheral metabolism of thyroxine with increased excretion of thyroxine-glucuronide in the bile (Bastomsky, Endocrinology 95: 1150-1155, 1974).The objectives of this investigation were (1) to investigate the histopathologic, histochemical, and ultrastructural changes in thyroid FC produced by the acute (4 week) and chronic (12 week) administration of low (50 ppm) and high (500 ppm) doses of PCB to rats, (2) to correlate these alterations to changes in serum immunoreactive thyroxine concentration, and (3) to investigate the persistence of the effects of PCB on the thyroid gland.

Cognition-enhancing effect of vagus nerve stimulation on refractory epilepsy secondary to lissencephaly: A case report.

2018 ◽  
Vol 11 (1) ◽  
pp. 80-85
Author(s):  
Rodrigo Marmo da Costa e Souza ◽  
Felipe Ricardo Pereira Vasconcelos De Arruda ◽  
Jose Anderson Galdino Santos ◽  
Jamerson De Carvalho Andrade ◽  
Suellen Mary Marinho Dos Santos Andrade ◽  
...  
Keyword(s):  
Case Report ◽  
Vagus Nerve ◽  
Nerve Stimulation ◽  
Vagus Nerve Stimulation ◽  
Refractory Epilepsy ◽  
Enhancing Effect
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