Comparative evaluation of the diagnostic significance of circulating immune complexes and antibodies to phosphatidylinositomannosides in pulmonary tuberculosis by enzyme-linked immunosorbent assay

1989 ◽  
Vol 178 (4) ◽  
Author(s):  
P.K. Mehta ◽  
G.K. Khuller
Keyword(s):  
Pulmonary Tuberculosis ◽  
Immunosorbent Assay ◽  
Immune Complexes ◽  
Comparative Evaluation ◽  
Circulating Immune Complexes ◽  
Enzyme Linked Immunosorbent Assay ◽  
Diagnostic Significance

Detection of circulating immune complexes in the sera of dogs infected with Dirofilaria immitis, by Clq-binding enzyme-linked immunosorbent assay

1986 ◽  
Vol 60 (3) ◽  
pp. 239-243 ◽  
Author(s):  
K. Matsumura ◽  
Y. Kazuta ◽  
R. Endo ◽  
K. Tanaka ◽  
T. Inoue
Keyword(s):  
Immunosorbent Assay ◽  
Immune Complexes ◽  
Dirofilaria Immitis ◽  
Significant Positive Correlation ◽  
Age Distribution ◽  
Circulating Immune Complexes ◽  
Enzyme Linked Immunosorbent Assay ◽  
Positive Correlation ◽  
Infection Age

AbstractThe presence of circulating immune complexes (CIC) in the sera of dogs infected with Dirofilaria immitis was detected by using a Clq-binding enzyme-linked immunosorbent assay. Specificity of this assay with different concentrations of heat-aggravated canine IgG (ACG) was observed, i.e., the ELISA readings, expressed as ug equivalents ACG/ml, increased with increasing amounts of ACG. The intra-assay variability was below 10%. The CIC levels of infected and uninfected dogs were 177–0± 104–7 ug/ml and 22–8±45–8 ng/ml (mean±SD), respectively. The highest level was observed in 12 dogs with amicrofilaraemic infection. Age distribution of CIC levels in the 23 infected dogs also showed a significant positive correlation. These findings suggested that the CIC are present in the sera of dogs with dirofilariasis and may relate to canine glomerulonephritis.

scholarly journals Immune complexes containing factor V in a patient with an acquired neutralizing antibody

Blood ◽  
1985 ◽  
Vol 65 (4) ◽  
pp. 810-818 ◽  
Author(s):  
HC Chiu ◽  
AK Rao ◽  
C Beckett ◽  
RW Colman
Keyword(s):  
Immunosorbent Assay ◽  
Immune Complexes ◽  
Neutralizing Antibody ◽  
Circulating Immune Complexes ◽  
Heat Inactivation ◽  
Enzyme Linked Immunosorbent Assay ◽  
Antibody Concentration ◽  
Factor V ◽  
Igg Antibody ◽  
Plasma Factor

Abstract An 82-year-old woman presented with extensive hematomas and melena associated with markedly decreased plasma factor V coagulant activity (FV:C). Using a competitive enzyme-linked immunosorbent assay developed in our laboratory, we made serial measurements of factor V antigen (FV:Ag) in plasma and found it to be normal or elevated. The patient's plasma was demonstrated to contain an IgG antibody that could neutralize FV:C in normal plasma. The antibody was of restricted heterogeneity (IgG1, IgG2,kappa). Circulating immune complexes containing antibody to factor V and FV:Ag were demonstrated directly in the plasma by immunoelectrophoresis with polyclonal monospecific antibody and with a monoclonal antibody using an enzyme-linked immunosorbent assay. Presence of neutralizing antibody could be demonstrated in vitro even at times when FV:C was within normal limits by heat inactivation of FV:C. Treatment with plasma and platelet transfusions as well as plasmapheresis induced definite but transient elevation of FV:C. Steroid therapy lowered the neutralizing antibody concentration and produced a rapid and persistent elevation of FV:C during two separate hospitalizations. This report describes a patient in whom levels of FV:Ag have been serially measured, and the presence of circulating immune complexes consisting of factor V and a neutralizing antibody have been directly demonstrated.

scholarly journals Nonspecific protective factors in patients with early latent syphilis (report 1)

2021 ◽  
Vol 26 (4) ◽  
pp. 138-143
Author(s):  
S.V. Zakharov  ◽  
V.K. Zakharov
Keyword(s):  
Protective Factors ◽  
Blood Serum ◽  
Immunosorbent Assay ◽  
Immune Complexes ◽  
Circulating Immune Complexes ◽  
Phagocytic Index ◽  
Enzyme Linked Immunosorbent Assay ◽  
Hla Dr ◽  
Latent Syphilis

The objective of this work is to study nonspecific protective factors in patients with latent early syphilis. The results of the study are based on the data of a comprehensive examination before treatment of 142 patients with early latent syphilis and 20 patients of the comparison group. Methods of investigation: serological methods for the diagnosis of syphilis complex of serological reactions, enzyme-linked immunosorbent assay (IgM, IgG), Indirect immunofluorescence reaction (RIF) RIF-200, RIF-abs; determination of cytokines IL-2, IL-6, IL-10, TNFα and INFγ in blood serum by enzyme-linked immunosorbent assay; determination of the phenotype of lymphocytes (CD-receptors), the concentration of circulating immune complexes, phagocytic number, phagocytic index, Nitroblue tetrazolium test. In the blood serum of patients the concentration of IL-2, IL-6, IL-10 and TNFα, INFγ was significantly increased. The concentration of IL-10 and IL-6 was also significantly increased in patients with more than 1 year of infection. The most significant disorders of the parameters of the metabolic activity of neutrophils were found in patients with an infection of more than 1 year; an imbalance in the circulating immune complexes concentration was also established. Under the increasing duration of the infection, the concentration of CD16+ in the blood serum progressively decreases. The content of pro-inflammatory and anti-inflammatory cytokines in the blood serum of patients with early latent syphilis was significantly increased and depended on the timing of infection. This relationship was most pronounced for IL-6 and IL-10. In patients with early latent syphilis there is also an imbalance between CD25+ and late activation factor HLA-DR against the background of a progressive decrease in the number of CD16+ lymphocytes. A direct relationship was established between the time of infection and the number of NK-cells. The revealed disorders may be the consequence of significant disorders on the part of neutrophils and may be one of the factors of the latent course of syphilitic infection.

scholarly journals Immune complexes containing factor V in a patient with an acquired neutralizing antibody

Blood ◽  
1985 ◽  
Vol 65 (4) ◽  
pp. 810-818
Author(s):  
HC Chiu ◽  
AK Rao ◽  
C Beckett ◽  
RW Colman
Keyword(s):  
Immunosorbent Assay ◽  
Immune Complexes ◽  
Neutralizing Antibody ◽  
Circulating Immune Complexes ◽  
Heat Inactivation ◽  
Enzyme Linked Immunosorbent Assay ◽  
Antibody Concentration ◽  
Factor V ◽  
Igg Antibody ◽  
Plasma Factor

An 82-year-old woman presented with extensive hematomas and melena associated with markedly decreased plasma factor V coagulant activity (FV:C). Using a competitive enzyme-linked immunosorbent assay developed in our laboratory, we made serial measurements of factor V antigen (FV:Ag) in plasma and found it to be normal or elevated. The patient's plasma was demonstrated to contain an IgG antibody that could neutralize FV:C in normal plasma. The antibody was of restricted heterogeneity (IgG1, IgG2,kappa). Circulating immune complexes containing antibody to factor V and FV:Ag were demonstrated directly in the plasma by immunoelectrophoresis with polyclonal monospecific antibody and with a monoclonal antibody using an enzyme-linked immunosorbent assay. Presence of neutralizing antibody could be demonstrated in vitro even at times when FV:C was within normal limits by heat inactivation of FV:C. Treatment with plasma and platelet transfusions as well as plasmapheresis induced definite but transient elevation of FV:C. Steroid therapy lowered the neutralizing antibody concentration and produced a rapid and persistent elevation of FV:C during two separate hospitalizations. This report describes a patient in whom levels of FV:Ag have been serially measured, and the presence of circulating immune complexes consisting of factor V and a neutralizing antibody have been directly demonstrated.

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