In order to study the relationship between serum specific IgE (sIgE) and allergen skin test, allergen skin tests and detections of sIgE in 220 allergic patients of Wuhan area were analyzed. The coherent rate of the two methods was beyond 70% (P < 0.01). It was concluded that the in vitro and in vivo detection methods of allergens have a high coherence and can be used as the effective ways to diagnose the allergic diseases in clinical practice.
Allergens ; China ; Dermatophagoides farinae/immunology ; Immunoglobulin E/*blood ; Rhinitis, Allergic, Perennial/*immunology ; Skin Tests ; Urticaria/*immunology

OBJECTIVETo evaluate the serological markers and biological marker in the diagnosis of hepatitis E infection in a rhesus monkey model.

METHODS86 rhesus monkeys had been infected with different doses of HEV. Hence, they were taken sequential blood samples at intervals up to 86 weeks for 4 hepatitis E virus (HEV) specific antibody assays (E2-IgM, E2-IgG, GL-IgG, and YES-IgG), and nucleic acid assay.

RESULTSAll the animals produced E2-IgG and all but one also produced E2-IgM and excreted the virus in stool, whereas positive rate of GL-IgG and YES IgG were low and correlated with virus level. Hepatitis occurred over a period of 4 weeks (between 3 an 7 weeks) after infection. Virological marker occurred mainly during incubation period and declined rapidly after onset of hepatitis. Seroconversion of E2-IgM occurred before onset of hepatitis in 70% monkeys and declined rapidly up to 50% of peak value after 4 weeks. E2-IgM seroconversion was closely paralleled by E2-IgG; however, E2-IgG persisted in all animals for the entire duration of experiment of up to 86 weeks. Production of GL-IgG and YES-IgG was delayed by one week after the E2 antibodies, these antibodies showed a transient occurrence and seroprevalence declined to 50% of the peak value over a period of 12 weeks.

CONCLUSIONE2-IgM might be used as a suitable acute hepatitis E marker, and E2-IgG as a suitable epidemiological marker. The seroconversion or titer elevation of GL-IgG and YES-IgG antibodies probably used to confirm the infection. The viral markers are optional for early diagnosis.

Alanine Transaminase ; blood ; Animals ; Biomarkers ; Genotype ; Hepatitis Antibodies ; blood ; Hepatitis E ; diagnosis ; Hepatitis E virus ; classification ; genetics ; immunology ; Immunoglobulin E ; blood ; Immunoglobulin M ; blood ; Macaca mulatta

OBJECTIVETo investigate the allergens of various allergic diseases in children.

METHODSSerum levels of Fx5E, Phadiatop and specific IgE were measured by the UniCAP100 System in 3 504 children with allergic diseases.

RESULTSThe positive rate of aeroallergens was obviously higher than that of food allergens in children with allergic rhinitis, allergic conjunctivitis, asthma and papular urticaria. In contrast, the positive rate of food allergens was obviously higher than that of aeroallergens in children with Henoch-Schonlein purpura and digestive diseases. The serum specific IgE level of aeroallergens was higher than that of food allergens. The dust and mite specific IgE levels reached to grade 6, while the food allergen specific IgE levels were lower than grade 3.

CONCLUSIONSAaeroallergens or food allergens vary remarkably in different allergic diseases in children. The level of specific IgE of aeroallergens is higher than that of food allergens.

Adolescent ; Allergens ; immunology ; Child ; Child, Preschool ; Female ; Humans ; Hypersensitivity ; immunology ; Immunoglobulin E ; blood ; Infant ; Male

OBJECTIVETo evaluate two commercial anti-hepatitis E virus (HEV) IgM kits used for differential diagnosis of acute enteric viral hepatitis.

METHODSThe kit for IgM capture assay, was produced with a recombinant HEV structural protein protecting primates against experimental infection by different HEV genotypes, while the other kit for indirect ELISA was produced with recombinant structural proteins from different HEV genotypes. The serum specimens were taken from 241 cases with a confirmed or presumptive diagnosis of hepatitis A and 74 cases with a confirmed or presumptive diagnosis of hepatitis E.

RESULTSThe sensitivity and specificity of the IgM capture assay kit were 97% and 100%, respectively, and the corresponding values for the other kit were 70% and 78%, respectively.

CONCLUSIONThe IgM capture assay kit has higher sensitivity and specificity in diagnosing acute enteric viral hepatitis E.

Diagnosis, Differential ; Hepatitis E ; diagnosis ; immunology ; Humans ; Immunoglobulin M ; blood ; immunology ; Reagent Kits, Diagnostic ; Sensitivity and Specificity

OBJECTIVETo explore the relationship between the major allergens of 6 common allergic foods and IgA nephropathy.

METHODSA sensitive sandwich enzyme-linked immunosorbent assay (ELISA) was used to detect the serum levels of food-specific IgA1, IgG and IgE in 31 patients with IgA nephropathy and 80 healthy volunteers. All the patients were examined for a history of food allergy using a questionnaire.

RESULTSSerum levels of IgA1 and IgG against the major allergens of the 6 common allergic foods were significantly higher in patients with IgA nephropathy than in healthy volunteers (P<0.05). There was no detectable food-specific IgE antibodies in the two groups. No patients had a clear history of food allergy. All the patients with increased IgG levels specific to 4 or more foods simultaneously had proteinuria.

CONCLUSIONSSome foods especially the highly allergic ones may participate in the pathogenesis and progression of IgA nephropathy.

Adult ; Antibody Specificity ; Case-Control Studies ; Female ; Food Hypersensitivity ; classification ; immunology ; Glomerulonephritis, IGA ; blood ; immunology ; Humans ; Immunoglobulin A ; blood ; Immunoglobulin E ; blood ; Immunoglobulin G ; blood ; Male ; Young Adult

OBJECTIVETo observe anti-HEV IgG response to vaccination of recombinant antigen fragments and evaluate its protection from Hepatitis E Virus infection in rhesus monkeys (Macaca mulatta).

METHODSTwelve monkeys were divided into three groups and immunized respectively with three different recombinant antigens: namely Ag1 (carboxyl terminal 431 amino acids of ORF2), Ag2 (128aa fragment at the carboxyl terminal of ORF2), and Ag3 (full length ORF3 ligated with two ORF2 fragments encoded by 6743-7126nt and 6287-6404nt). The monkeys were challenged intravenously with fecal suspension from experimentally infected rhesus monkeys, and the other three monkeys served as the placebo group for challenge with HEV. The dynamic changes of the levels of ALT and anti-HEV IgG were examined. Pathological changes of liver tissue were observed by light microscope. Excretion of virus was detected by RT-nPCR.

RESULTSHepatic histopathology of two monkeys in the placebo group was consistent with acute viral hepatitis, and ALT was elevated 3-4 weeks after inoculated with virus, up to 10-20 times higher than normal level. The liver tissue of monkeys immunized with antigen kept normal, ALT in several monkeys elevated mildly, and anti-HEV IgG conversation occurred at 1-2 weeks after vaccination, with the titer reaching 1:12,800. The virus RNA could be detected by RT-nPCR from days 7 to 50 in monkeys of control group, and from days 7 to 21 in vaccinated monkeys after challenged with virus.

CONCLUSIONSThe recombinant antigens could induce the production of anti-HEV IgG, which protected rhesus monkeys from acute Hepatitis symptoms related to HEV infection.

Animals ; Antigens, Viral ; immunology ; Hepatitis E ; prevention & control ; Hepatitis E virus ; immunology ; Immunoglobulin G ; immunology ; Macaca mulatta ; RNA, Viral ; blood ; Recombinant Proteins ; immunology ; Vaccination ; Viral Hepatitis Vaccines ; immunology

OBJECTIVETo investigate the relationship between immune function and the recurrent parotitis (RP) for children.

METHODSThe children diagnosed as RP were divided into two groups: aged under 6y and over 6y and the immune function were measured and compared with that of normal children.

RESULTSFor RP children the ratio of CD4+ T cell in over 6y group was significantly lower than that in under 6y group (P<0.05), while IgG value in over 6y group was higher than that in under 6y group (P<0.05). Compared with normal children, RP children in under 6y group had higher CD8+ T cell ratio and IgG, IgE, IgA and C3 value (P<0.01) and lower CD4+ T cell ratio (P<0.01), while RP children over 6y group, they had higher CD8+ T cell ratio, IgE value (P<0.01) and C3 (P<0.05), lower CD4

CONCLUSIONImpaired immune function may play an important role in the recurrent parotitis in children.

CD4-CD8 Ratio ; CD4-Positive T-Lymphocytes ; cytology ; immunology ; Child ; Child, Preschool ; Female ; Humans ; Immunoglobulin A ; blood ; Immunoglobulin E ; blood ; Immunoglobulin G ; blood ; Infant ; Male ; Parotitis ; immunology ; Recurrence

OBJECTIVETo study the expression of serum Clara cell secretory protein 10 (CC10) and total IgE concentration in wheezing children under 5 years old.

METHODSFifty-nine children with recurrent wheezing under 5 years old were classified into two groups: wheezing group 1 with atopic high risks (n=33) and wheezing group 2 without atopic high risks (n=26). Twenty-three children without infectious diseases served as a control group. Serum levels of CC10 and IgE were measured using a solid-phase sandwich ELISA.

RESULTSThe serum levels of CC10 in wheezing group 1 (3.95 ± 1.26 ng/mL) and wheezing group 2 (5.41 ± 1.64 ng/mL) were significantly lower than those in the control group (8.72 ± 2.23 ng/mL; P<0.01). The wheezing group 1 showed more decreased serum levels of CC10 compared with wheezing group 2 (P<0.05). The serum IgE levels in wheezing group 1 were significantly higher than those in wheezing group 2 and the control group (P<0.05). There were no significant differences in serum IgE levels between the wheezing group 2 and control group. There was a negative correlation between serum levels of CC10 and IgE in wheezing group 1 (r=-0.912, P < 0.01).

CONCLUSIONSSerum CC10 levels decrease remarkably in wheezing children, and more significant decrease is noted in patients with atopic high risks. Serum CC10 levels are negatively correlated to serum IgE levels in patients with atopic high risks.

Child, Preschool ; Female ; Humans ; Immunoglobulin E ; blood ; Infant ; Male ; Respiratory Sounds ; immunology ; Uteroglobin ; blood

OBJECTIVE: To explore the clinical use of sieving detection among the childhood with allergic disease. METHOD: The sieving detection about allergen inhalant allergens, Fx5 in the CAP anaphylactogen detection system, and serum specific IgE were detected in three hundred and thirty-one cases of children (aged from 1 year to 14 years old) with allergic disease. Patients were divided into group 1, group 2 and group 3 according to the age from 0 to 3, 3 to 6, and 6 to 14 years old. All datas were statistical analysed among different age groups. RESULT: Among the 331 patients, the positive rate of allergic sieving detection was 67.98%, the elevation rate of IgE was 53.78%. Inhalant allergen positive rate was 60.42%, while the food allergen positive rate was 28.10%. Inhalant allergen positive rate of the group 3 (aged from 6 to 14 years old) was significant higher than the other two age groups (68.45%). And the food allergen positive rate of the age group 1 (aged from 0 to 3 years old) was significant higher than the other two age groups (62.50%). Positive rate for simply inhalant allergen was 39.88%, while positive rate for simply food allergen was 7.55% and mixed allergen was 20.54%. CONCLUSION Inhalant allergen was the main allergen of the children with allergic disease aged over 3 years old, while food allergen was the main allergen of the children with allergic disease aged below 3 years old. It was safe, sensible and effective to use Uni CAP anaphylactogen detection system for rapid assay of specific allergens.
Adolescent ; Allergens ; blood ; immunology ; Child ; Child, Preschool ; Female ; Humans ; Hypersensitivity ; blood ; diagnosis ; immunology ; Immunoglobulin E ; blood ; Infant ; Male

OBJECTIVETo compare the serological characters of an outbreak of hepatitis E and evaluate sensitivity and specificity of anti-HEV E2-IgM.

METHODSThe sera collected from the employees of an outbreak unit were detected for anti-HEV E2-IgM and IgG, and the serum samples from a neighboring department were used as control. The results detected with anti-HEV E2-IgM, IgG and Genelab anti-HEV IgM, IgG in some samples were compared.

RESULTSThe positive rate of anti-HEV E2-IgM in the control group was 0.11%. The results between the positive and the negative samples can be distinguished easily. The specificity of anti-HEV E2-IgM is about 99.89%. The positive rate of anti-HEV E2-IgM in outbreak stricken population was 8.66%, significantly higher than that in the control group (P < 0.001). The results from HEV patients' serial samples in the outbreak unit showed that the anti-HEV E2-IgM titer was high 30-60 days after the infected and then declined clearly. The positivity seemed unrelated to neither sex nor age. Among the 115 positive to anti-HEV E2-IgM, 27 were negative to Genelab anti-HEV IgG, the fact indicated a rather high risk of misdiagnosis of about 23.48%. In the 179 randomized samples of the control group, the positive rate of Genelabs anti-HEV IgG was about 11.17%. In 110 samples for the positive anti-HEV E2-IgM, the positive ratio of Genelabs anti-HEV IgG was about 76.36%, and that of Genelabs anti-HEV IgM only 69.09%. There were 16 samples negative for both Genelabs anti-HEV IgG and IgM. The ratio of the difference between the Genelabs anti-HEV IgG and IgM was about 25.45%.

CONCLUSIONThe specificity of anti-HEV E2-IgM was about 99%, and false positive rate was low. The sensitivity of anti-HEV E2-IgM in acute hepatitis E infection was 25%-30% higher than that of Genelabs anti-HEV IgM,IgG. The infected persons in the outbreak unit can be preferably distinguished from the non-infected persons by anti-HEV E2-IgM. Anti-HEV E2-IgM can image the characters of the outbreak of HEV and played a great role in the control of outbreak and in the early diagnosis for hepatitis E.

Antibodies, Viral ; blood ; China ; epidemiology ; Disease Outbreaks ; Enzyme-Linked Immunosorbent Assay ; Hepatitis E ; blood ; epidemiology ; virology ; Hepatitis E virus ; immunology ; Humans ; Immunoglobulin G ; blood ; Immunoglobulin M ; blood