• Journal of Sensor Science and Technology
• /
• v.20 no.6
• /
• pp.434-438
• /
• 2011

A portable surface plasmon resonance(SPR) based immunosensor using thiolated protein G and protein G was developed for the detection of immunoglobulin G(IgG). The protein G has specific affinity with Fc fragment of IgG and was thiolated by 2-Iminothiolane for introduction of thiol groups. Anti-IgG, bovine serum albumin(BSA), and IgG have been sequently injected after surface modification of gold sensor chip with protein G and thiolated protein G. The output signal was increased with the injection of each protein and the actual signal was measured by subtracting signal of reference channel from signal of sample injected channel. The experimental results showed the higher detection capability of IgG using thiolated protein G compared with protein G. From these results, we can conclude that the current surface modification technique and the portable SPR sensor system can be applied to various immunosensors for diagnosis.

• Journal of Preventive Medicine and Public Health
• /
• v.20 no.2 s.22
• /
• pp.247-254
• /
• 1987

Serum immunoglobulin(Ig)A, IgG, IgM, levels were measured in 99 coal workers' pneumoconiosis (CWP) patients and 12 healthy coal workers and 9 non-miners to compare with each group by the radiological categories, its complications and working period in coal mine. Serum were measured by nephelometry, The findings were as follows: 1) Serum IgA levels were significantly different between three groups of CWP patient, healthy coal worker and non-miner ($mean{\pm}standard$ deviation: $226.4{\pm}87.7,\;221.3{\pm}45.1,\;170.1{\pm}65.7$ respectively). 2) There were no significant differences of Ig levels among radiological categories of CWP. 3) There were no significant differences of Ig levels among simple pneumoconiosis and its complicated disorders. 4) The three Ig levels were slightly increased in the group of mining years less than 20 years (IgA: r=0.1869, p<0.10 IgG: r=0.2902, p<0.05 IgM: r=0.2889, p<0.05).

• Korean Journal of Veterinary Research
• /
• v.29 no.4
• /
• pp.517-523
• /
• 1989

This study was undertaken to establish reliable diagnostic-procedures for the microbiological monitoring of laboratory animals. Murine(mice and rats) antibodies against hemagglutinating virus of Japan(HVJ), mouse hepatitis virus(MHV) and Mycoplasma pulmonis(Mp) were detected sensitively and specifically in experimentally and naturally infected animals' sera by an indirect enzyme-linked immunosorbent assay(ELISA), using urease conjugated antimurine immunoglobulin. The sensitivity and specificity of the complement fixation test which has been apllied widely for serodiagnosis of HVJ, MHV and Mp infections were apparently lower than those of ELISA. From these results, the ELISA was found to be available for the serodiagnosis of HVJ, MHV and Mp infections in mice and rats.

• Preventive Nutrition and Food Science
• /
• v.21 no.4
• /
• pp.323-329
• /
• 2016

Achyranthes japonica Nakai (AJN) water extract has a variety of physiological properties, including anti-diabetic, anti-cancer, anti-inflammatory, anti-microbial, and anti-oxidative activities. In the present study, the inhibitory effects of AJN extract were investigated in high affinity immunoglobulin E receptor ($Fc{\varepsilon}RI$)-mediated KU812F cells activation. AJN extract showed suppressive effects on histamine release and intracellular calcium [$Ca^{2+}$]i elevation from anti$Fc{\varepsilon}RI$ antibody (CRA-1)-stimulated cells in a dose-dependent manner. Flow cytometric analysis showed that AJN extract treatment caused a dose-dependent decrease in the cell surface $Fc{\varepsilon}RI$ expression and the binding between the cell surface $Fc{\varepsilon}RI$ and the IgE antibody. Moreover, reverse transcription-polymerase chain reaction analysis showed that levels of the mRNA for the $Fc{\varepsilon}RI$ ${\alpha}$ chain was decreased by treatment with AJN extract. These results indicate that AJN extract may exert anti-allergic effects via the inhibition of calcium influx and histamine release, which occurs as a result from the downregulation of the binding of IgE antibody to cell surface $Fc{\varepsilon}RI$. This mechanism may occur through $Fc{\varepsilon}RI$ expression inhibition.

• BMB Reports
• /
• v.29 no.5
• /
• pp.455-461
• /
• 1996

A serine proteinase was purified from Acanthamoeba culbertsoni by 41~80% ammonium sulfate fractionation, ion exchange chromatography, affinity chromatography and gel filtration chromatography. The molecular weight of the purified enzyme was estimated to be 108.0 kDa by gel filtration chromatography and 54.0 kDa by SDS-PAGE. Therefore, the purified enzyme seemed to be a dimer. Isoelectric point was 4.5. The enzyme activity was highly inhibited by the serine proteinase inhibitors diisopropyl fluorophosphate (OFP) and phenylmethyl sulfonylfluoride (PMSF). It had a narrow pH optimum of 6.5~7.5 with a maximum at pH 7.0. These data suggested that the purified enzyme was a neutral serine proteinase. Optimal temperature was $37^{\circ}C$. It was stable for at least 16 h at $4^{\circ}C$ and $37^{\circ}C$, but it was rapidly inactivated at $65^{\circ}C$ The activity of the purified enzyme was not influenced significantly by $Mg^{2+}$, $Mn^{2+}$, $Zn^{2+}$ or $Ca^{2+}$. However, the enzyme activity was highly inhibited by $Hg^{2+}$ The enzyme degraded type I collagen and fibronectin, but not BSA, hemoglobin, lysozyme, immunoglobulin A or immunoglobulin G.

• The Korean Journal of Nuclear Medicine
• /
• v.19 no.1
• /
• pp.95-102
• /
• 1985

The activation of adenylate cyclase of human thyrocytes in primary cell culture and the release of c-AMP into the medium are used to detect b-TSH and TSAb in sera of patients with autoimmune thyroid disease. Sera of patients are used directly as a part of cell culture without immunoglobulin precipitation. In the above TSI bioassay, TSAb pooled serum show c-AMP concentration between that of 1mU/ml and 10 mU/ml b-TSH but normal control pooled serum doesn't show any detectable c-AMP response. Ninety fiye percent of untreated Graves' patients shows TSAb activity above normal range, 20% of Hashimoto's and 36% of euthyroid Graves' patients show detectable TSAb activity.

• Journal of Chest Surgery
• /
• v.39 no.1 s.258
• /
• pp.85-89
• /
• 2006

Good's syndrome (thymoma with immunodeficiency) is a rare cause of combined B and T cell immunodeficiency in adults. The clinical characteristics are increased susceptibility to bacterial infection and opportunistic viral and fungal infections. The most consistent immunological abnormalities are hypogammaglobulinemia and reduced or absent B cells. This syndrome should be treated by resecting the thymoma and replacing the immunoglobulin to maintain adequate IgG values. The author experienced one case of Good's Syndrome. The patient was a 64-year-old female who had a history of frequent sinopulmonary infection. Chest CT showed Pneumonia and anterior mediastinal mass and PCNB was taken and biopsy result was thymoma. She received thymectomy and replacement of immunoglobulin to control hypogammaglobulinemia.

• The Journal of Pediatrics of Korean Medicine
• /
• v.15 no.1
• /
• pp.131-153
• /
• 2001

The author measured IgG1, IgG2, IgG3 and IgG4 levels of 22 ears-11 ears of them had treated by antibiotics, 11 of them by Kami-hyunggyeyungyotang-of pediatric recurrent otitis media with effusion using ELISA assay, and compared them. The results were obtained as follows. 1. The level of IgG1 in Kami-hyunggyeyungyotang group was significantly higher than that in antibiotics group(P=0.002). 2. The level of IgG2 in Kami-hyunggyeyungyotang group was higher than that in antibiotics group(P=0.178). 3. The level of IgG3 in Kami-hyunggyeyungyotang group was higher than that in antibiotics group(P=0.215). 4. The level of IgG4 in Kami-hyunggyeyungyotang group was higher than that in antibiotics group(P=0.198). According to above results, Kami-hyunggyeyungyotang is considered to be used for treatment 'recurrent otitis media with effusion' by controlling the production of immunoglobulins.

• Korean Journal of Acupuncture
• /
• v.20 no.4
• /
• pp.53-63
• /
• 2003

Objective : Experimental studies were done to research the clinical effects of Herba Patriniae(HP) aqua-acupuncture ($BL_{13},\;BL_{17},\;BL_{13}{\cdot}BL_{17}$ and free points) on the anti-allergic inflammatory response. Methods : We measured active systemic anaphylatic shock induced by compound 48/80 and microvascular permeability increased by acetic acid. And we measured total IgE and plasma WBC level, serum total protein, albumin, immunoglobulin and NO levels induced by egg albumin. Results : HP aqua-acupuncture pretreatments at all acupoints inhibited active systemic anaphylatic shock induced by compound 48/80 and microvascular permeability increased by acetic acid. Total IgE and plasma WBC level inhibited by HP aqua-acupuncture pretreatment at $BL_{13}\;BL_{17}$ and free points. However, HP aqua-acupuncture didn't effect serum total protein, albumin, immunoglobulin and NO levels. Conclusion : These results suggest that HP aqua-acupuncture may be beneficial in the regulation of type Ⅰ allergic reaction, but is further required immunological studies on the allergic reaction.

• BMB Reports
• /
• v.52 no.12
• /
• pp.671-678
• /
• 2019

The random V(D)J recombination process ensures the diversity of the primary immunoglobulin (Ig) repertoire. In two thirds of cases, imprecise recombination between variable (V), diversity (D), and joining (J) segments induces a frameshift in the open reading frame that leads to the appearance of premature termination codons (PTCs). Thus, many B lineage cells harbour biallelic V(D)J-rearrangements of Ig heavy or light chain genes, with a productively-recombined allele encoding the functional Ig chain and a nonproductive allele potentially encoding truncated Ig polypeptides. Since the pattern of Ig gene expression is mostly biallelic, transcription initiated from nonproductive Ig alleles generates considerable amounts of primary transcripts with out-of-frame V(D)J junctions. How RNA surveillance pathways cooperate to control the noise from nonproductive Ig genes will be discussed in this review, focusing on the benefits of nonsense- mediated mRNA decay (NMD) activation during B-cell development and detrimental effects of nonsense-associated altered splicing (NAS) in terminally differentiated plasma cells.