OBJECTIVE: To investigate the role of multiple serological methods in the identification of complex antibodies. METHODS: The blood group antigens were detected by saline and microcolumn agglutination methods. The saline method was used to screen and identify IgM-type antibodies in the patient's serum, while the polybrene, anti-globulin, microcolumn agglutination, enzymic and absorption-elution methods were used to screen and identify IgG-type antibodies. RESULTS: The patient was B/CCDee/Jk(a-b+)/Fy(a-b+) blood type. The serum reacted with panel cells, and the reaction presented anti-E pattern in the saline medium. It was fully positive in the microcolumn agglutination card, except 2 negative ones after using papain to treat the panel cells. Referring to the pattern table, it was concluded that there existed anti-c, anti-E, and anti-Jk^a antibodies, and one antibody corresponding to an antigen that was easily destroyed by papain. The red blood cells with specific phenotype were selected for absorption-elution to identify IgG-type anti-c, anti-E, anti-Jk^a and anti-Fy^a antibodies. CONCLUSION It is confirmed that IgM-type anti-E, and IgG-type anti-c, anti-E, anti-Jk^a and anti-Fy^a antibodies exist in the patient's serum by multiple serological methods.
Humans ; Papain ; Blood Group Antigens ; Erythrocytes ; Immunoglobulin G ; Immunoglobulin M

OBJECTIVETo study the possible role of human β-defensins 1 (Hbd-1) and immunoglobulins A, G and M (IgA, IgG and IgM) in the development of recurrent pneumonia by measuring serum concentrations of the above indexes in infants with recurrent pneumonia and healthy infants.

METHODSSerum samples were obtained from 35 healthy children and 35 children aged from 2 to 24 months with recurrent pneumonia. Serum Hbd-1 concentration was measured using ELISA. Serum IgA, IgG and IgM concentrations were measured by immunonephelometry. The correlation of hBD-1 with IgA, IgG and IgM was evaluated.

RESULTSThe serum concentration of hBD-1 in infants with recurrent pneumonia (14±11 μg/mL) was significantly lower than in controls (18±11 μg/mL) (P<0.05), as was the serum concentration of IgA in infants with recurrent pneumonia (1.3±0.6 g/L vs 1.5±0.8 g/L; P<0.05). The serum concentration of IgG in infants with recurrent pneumonia was also significantly lower than in controls (9±3 g/L vs 13±5 g/L; P<0.05). There were no linear relationships between serum Hbd-1 and IgA, IgG and IgM (P>0.05).

CONCLUSIONSThe serum levels of hBD-1, IgA and IgG decrease in infants with recurrent pneumonia, suggesting disorders in the immune defensive function of the respiratory tract, and this may be one of the immunity related reasons for recurrent pneumonia in infants. It is of great clinical value to measure serum levels of Hbd-1, IgA, IgG and IgM in infants with recurrent pneumonia.

Female ; Humans ; Immunoglobulin A ; blood ; Immunoglobulin G ; blood ; Immunoglobulin M ; blood ; Immunoglobulins ; blood ; Infant ; Male ; Pneumonia ; immunology ; Recurrence ; beta-Defensins ; blood

The changes in serum levels of immunoglobulins G, M and A of dairy and beef calves of well-managed herds were monitored from birth to 14 days post partum using single radial immunodiffusion. Serum levels of all three immunoglobulin classes reached its peak at 24 hours in both groups of calves after birth, at which time there were very high levels of each immunoglobulin present. The mean IgM and IgA levels of the two groups became same at 6 days and 8 days of age, respectively but the mean IgG level of beef calves was approximately twice that of dairy calves throughout the experiment.
Animals ; Animals, Newborn ; Cattle/*immunology ; Female ; Immunodiffusion/veterinary ; Immunoglobulin A/blood ; Immunoglobulin G/blood ; Immunoglobulin M/blood ; Immunoglobulins/*blood ; Male ; Pregnancy

Objective: To summarize changes of serum immunoglobulin levels before and after chemotherapy in children with Burkitt lymphoma (BL), so as to investigate the effects of chemotherapy and rituximab on serum immunoglobulin levels in children with BL. Methods: Clinical data of 223 children with newly diagnosed Burkitt lymphoma at Beijing Children's Hospital from January 2009 to April 2017 were analyzed retrospectively. They were treated according to the modified LMB 89 regimen and some of them received combined rituximab therapy during the chemotherapy. The serum immunoglobulin (IgA, IgM, IgG) before chemotherapy, at the time of discontinuing chemotherapy, as well as 6, 12, 24, 36 months after chemotherapy were collected. Changes of serum IgA, IgM and IgG with time among different treatment groups were compared using repeated measures ANOVA. Results: According to risk group, 223 children were devided into group B（n=53）and group C（n=170）. Before chemotherapy, 109 cases (48.9%) were combined with hypogammaglobulinemia. The serum IgA, IgM, and IgG levels of all the patients were (0.9±0.7), 1.2 (0.5, 1.3) and (7.2±2.9) g/L before chemotherapy, (0.5±0.4), 0.2 (0.1, 0.3) and (6.3±2.3) g/L at the time of discontinuing chemotherapy (t=13.63, Z=-11.99, t=4.57, all P<0.05). There were statistical difference in IgA, IgM levels of group B and IgA, IgM, IgG levels of group C before chemotherapy and at the time of discontinuing chemotherapy (t=8.86, Z=-6.28, t=11.19, Z=-10.15, t=4.50, all P<0.05). The differences of serum IgA and IgG levels at the time after chemotherapy among patients treated with chemotherapy alone and those treated with chemotherapy combined rituximab in group B and C were significant (F=5.38, P=0.002 and F=4.22, P=0.007). Conclusions: Approximately half of children with BL have already existed hypogammaglobulinemia at initial diagnosis prior to the start of treatment. The modified LMB 89 regimen have significant effect on humoral immunity of children with BL. In the process of immune reconstruction after chemotherapy, rituximab has more significant effect on serum IgA and IgG levels in BL patients.
Agammaglobulinemia ; Burkitt Lymphoma/drug therapy* ; Child ; Humans ; Immunoglobulin A/blood* ; Immunoglobulin G/blood* ; Immunoglobulin M/blood* ; Retrospective Studies ; Rituximab/therapeutic use*

Pseudothrombocytopenia is an in vitro phenomenon usually associated with anticoagulant (ethylene diaminetetraacetic acid, EDTA)-dependent IgG platelet agglutinins. Two cases of pseudothrombocytopenia due to EDTA-independent agglutinins are reported. The fingerstick blood smear showed platelet clumping as well as EDTA, citrate and heparin samples. In a case with malaria, serum IgM was 985 mg/dL and serum protein immunofixation demonstrated an additional IgM band which disappeared together with platelet clumping a month later. The increased immunoglobulin (especially, IgM) appeared to be associated with platelet agglutinin. Another case had cold reactive agglutinin because the electronic platelet counts were dependent on temperature. These cases illustrate that pseudothrombocytopenia may be caused by more than one type of agglutinin and can be confirmed by using a direct fingerstick, keeping the sample warm, or drawing the blood into another anticoagulant.
Agglutinins* ; Blood Platelets ; Citric Acid ; Edetic Acid ; Heparin ; Immunoglobulin G ; Immunoglobulin M ; Immunoglobulins ; Malaria ; Platelet Count

Adolescent ; Arthritis, Juvenile ; blood ; immunology ; pathology ; Child ; Child, Preschool ; Female ; Humans ; Immunoglobulin A ; blood ; Immunoglobulin G ; blood ; Immunoglobulin M ; blood ; Interferon-gamma ; blood ; Interleukin-4 ; blood ; Male

OBJECTIVETo evaluate the reliability of different hepatitis E diagnosis reagent tests on the acute hepatitis E.

METHODSThree acute hepatitis E diagnosis tests, E2-IgM (Wantai, China), GL-IgM and GL-IgG (Genelabs, Singapore) were compared for their reliability in a sera panel composed by 273 healthy individuals and 525 hepatitis.

RESULTSThe specificity of E2-IgM on the diagnosis of acute hepatitis E was 100.0%, it was significantly higher than GL-IgM (96.7%) and GL-IgG (85.4%). The sensitivity of E2-IgM and GL-IgG were 97.9% and 93.8% respectively, both significantly higher than GL-IgM (72.9%). Among 65 acute hepatitis cases being positive on GL-IgM test but negative on E2-IgM, 58 (89.2%) cases were found to be positive with anti-hepatitis A virus IgM, it indicated that the GL-IgM test might be interfered by other IgM antibodies on serum.

CONCLUSIONE2-IgM is a good test for the diagnosis of acute hepatitis E.

Acute Disease ; Hepatitis Antibodies ; blood ; Hepatitis E ; diagnosis ; Humans ; Immunoglobulin G ; blood ; Immunoglobulin M ; blood ; Reagent Kits, Diagnostic ; Sensitivity and Specificity

With development of immunochemical methods for anlysis of serum proteins, quantitative determination of serum immunoglobulin levels and purification of them have been made possible in recent years. There are numerous reports about immunoglobulin levels in various diseases. A search of the literature reveals very few reports of quantitative immunoglobulin determinations in allergic dermatoses. The present study was conducted to find quantitative changes of serum immunoglobulins in a few allergic dermatoses. To quantify the IgG, IgA and IgM, one hundred and two sera were analysed form 30 normal control group, 30 contact dermatitis patients, 12 stopic dermatitis patients and 30 urticaria patients by modified Oudin's capillary tube method. The results are as follows. 1.In contact dermatitis the IgG was significantly increased to compare with control group(p<0.01) 2.In atopic dermatitis the IgA was significantly increased to compare with control group(p<0.01) 3.In urticaria the IgG was increased (p<0.05) 4.The IgM has no differences between allergic dermatoses and control group.
Blood Proteins ; Capillaries ; Dermatitis ; Dermatitis, Atopic ; Dermatitis, Contact ; Humans ; Immunoglobulin A ; Immunoglobulin G ; Immunoglobulin M ; Immunoglobulins ; Skin Diseases* ; Urticaria

BACKGROUND: Although many studies have demonstrated the well tolerance of intensive and long-term plasmapheresis in healthy donors, the effects on Korean donors have not been carefully investigated. Thirty donors were studied to investigate the effects of long-term plasmapheresis on Korean volunteer donors. METHODS: Thirty donors who had donated plasma regularly over a period of 3 years were selected. They were divided into group 1, 2 and 3 by the frequency of plasmapheresis per year and group A, B and C by the number of whole blood donations. Three of them had follow-up data at 7 days after. Whole blood was taken from the donors both before and after plasmapheresis by Fenwal Autopheresis-C system. Each sample was assayed for CBC, plasma total protein, albumin, IgG, IgA, IgM, ferritin and plasma hemoglobin. RESLUTS: For total protein, albumin, IgG, IgA and IgM, all the donors showed values in the normal range even with significant decreases after plasmapheresis. And there were no differences between groups. For ferritin, the mean values before and after plasmapheresis were 19.2 +/- 15.1 ng/mL and 17.8 +/- 15.2 ng/mL, respectively. In group 3 with highest frequency of plasmapheresis, the mean ferritin value was significantly lower than that of other groups as 7.3 +/- 5.0 (p<0.00.) Furthermore, the value was lower than 10 ng/mL which is the indicative value of iron depleted status. CONCLUSION: Long-term plasmapheresis donors had no significant changes in total protein, albumin, IgG, IgA and IgM. But they had mean ferritin values lower than the indicative value of iron depleted status. This implies that intensive and long-term plasmapheresis, might result iron depletion in donors. Consequently, a monitoring system to take care of regular plasmapheresis donation should be established.
Blood Donors ; Ferritins ; Follow-Up Studies ; Humans ; Immunoglobulin A ; Immunoglobulin G ; Immunoglobulin M ; Iron ; Plasma ; Plasmapheresis* ; Reference Values ; Tissue Donors* ; Volunteers

OBJECTIVETo establish the method of enzyme-linked immunosorbent assay (ELISA) for measuring human IgM autoantibody to folate receptor.

METHODSFolate receptor was extracted and purified from the healthy woman placenta. The protein was coated on 96-well plates with a concentration of 5 ng/Μl. Goat monoclonal antibody was used for detecting antibody. Pooled plasma from healthy donors was used to plot the standard curve and the IgM concentration of pooled plasma was defined as 1. We set up an ELISA procedure to measure human IgM autoantibody to folate receptor. The sensitivity, precision, and stability of the method were evaluated. Further, the folate receptor and bovine folate-binding protein were used as the antigen, respectively, to determine the autoantibody levels in 24 healthy individuals and 20 individuals once gave birth to baby with neural tube defects.

RESULTSThe measuring range of the method was from 6.25 × 10⁻⁴ to 8.00 × 10⁻². The lowest IgM level that can be detected was 3.12 × 10⁻⁴. The inter-assay coefficients of variations for samples with high, medium, and low IgM levels were 6.61%,3.50%, and 5.12%, respectively. The intra-assay coefficients of variations were 4.54%, 5.49%, and 5.44%, respectively. The stability test results were considered within acceptable limits. The data from folate receptor-ELISA was significantly higher than that from bovine folate binding protein-ELISA, both in the healthy group (t=-11.9, P<0.001) and in the neural tube defect group (t = 7.35, P<0.001).

CONCLUSIONSThe folate receptor-ELISA method for measuring human IgM autoantibody to folate receptor was successfully established. The method is sensitive, repeatable, and stable.

Autoantibodies ; blood ; Enzyme-Linked Immunosorbent Assay ; methods ; Folate Receptor 2 ; immunology ; Humans ; Immunoglobulin M ; blood