• Title, Summary, Keyword: Immunoglobulin

Search Result 1,073, Processing Time 0.053 seconds

Construction and Characterization of a Single-Chain Immunoglobulin

  • Kim, Youn-Kyu;Choi, In-Hak;Ryu, Chun-Jeih;Hong, Hyo-Jeong
    • BMB Reports
    • /
    • v.30 no.3
    • /
    • pp.177-181
    • /
    • 1997
  • We constructed a single-chain immunoglobulin in which the carboxyl end of the heavy chain variable domain is covalently joined to the amino terminus of the light chain variable domain via peptide linker and the carboxyl end of the light chain variable domain is linked to human ${\gamma}1$ Fc region through the hinge region. The molecule was expressed in Chinese hamster ovary cells, assembled into a dimeric molecule and secreted into the culture medium. The dimeric molecule (2E11) was purified from the culture supernatant by affinity chromatography on Protein G-Sepharose column. The size of the unreduced or reduced protein was the expected molecular weight of approximately 120 or 60 kDa, respectively, as assessed by SDS-polyacrylamide gel electrophoresis. The antigen-binding affinity of 2E11 was almost the same as that of a native antibody counterpart (CS131A), suggesting that the single-chain immunoglobulin may function like a native antibody.

  • PDF

Anti-nuclear antibody-negative immunoglobulin G4-associated autoimmune hepatitis mimicking lymphoproliferative disorders

  • Kang, Min Kyu;Park, Jung Gil;Choi, Joon Hyuk
    • Yeungnam University Journal of Medicine
    • /
    • v.37 no.2
    • /
    • pp.136-140
    • /
    • 2020
  • Immunoglobulin G4 (IgG4)-associated autoimmune hepatitis (AIH) is a very rare subtype of autoimmune hepatitis and characterized by marked elevated serum IgG and hepatic infiltration of IgG4-expressing plasma cells. Pathologic confirmation of hepatic IgG4-expressing plasma cells is usually required for the final diagnosis of IgG4-associated AIH. Herein, we report the case of a 47-year-old female diagnosed with autoantibody-negative IgG4-associated AIH mimicking lymphoproliferative disorders.

THE CHANGES OF IMMUNOGLOBULIN ISOTYPES IN WHOLE SALIVA IN INFECTED PATIENTS OF ORAL AND MAXILLOFACIAL REGION (구강악안면 감염환자의 타액에서 Immunoglobulin Isotypes의 변화)

  • Byun, June-Ho;Chung, In-Kyo
    • Journal of the Korean Association of Oral and Maxillofacial Surgeons
    • /
    • v.26 no.2
    • /
    • pp.186-190
    • /
    • 2000
  • Purpose : The purpose of this study is to observe the salivary immunoglobulin level in whole saliva of infected patients and also to investigate the changes of immunoglobulin level according to its management. Materials & Methods : Thirty infected patients who have been admitted to the dept. of oral and maxillofacial surgery of Pusan National University Hospital have been selected as subjects and we analysed the changes of immunoglobulin level of $1.5{\sim}3.0ml$ of unstimulated whole saliva collected throughout four times; the day before treatment, the first day after treatment, the third day after treatment and the day before discharge. We also compared them with immunoglobulins in whole saliva that was collected from 4 normal persons as control group. In radial immunodiffusion technique with BACKMAN(Array 360 system, McLean, USA), level of immunoglobulins was analyzed. Results : The isotypes of Ig that have been found in saliva of normal persons were IgG, IgA, IgM and IgE and their mean level was 8.23, 36.41, 4.38, and 2.38 respectively. In the infected patients before the treatment, the level of IgG, IgA was remarkably higher than that of normal persons, however we could not find the difference on the level of IgM, IgE. As the infection was healing, the level of IgG, IgA was decresing significantly.

  • PDF

THE DENTAL CARIES, CARIOGENIC MICROORGANISMS AND LEVELS OF SALIVARY IMMUNOGLOBULIN IN SUBJECTS WITH DOWN'S SYNDROME (다운증후군 환자의 치아우식증과 치아우식 원인균 및 타액내 면역항체의 연관성)

  • Kim, Seon-Mi;Yang, Kyu-Ho;Choi, Nam-Ki;Kang, Mi-Sun;Lim, Hoi-Soon;Oh, Jong-Suk
    • JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY
    • /
    • v.34 no.1
    • /
    • pp.130-139
    • /
    • 2007
  • This study investigated the relationship between dental caries and various oral factors in subjects with Down's syndrome. We compared 25 subjects with Down's syndrome with 63 healthy control. The dental caries index and plaque index were examined, and the total salivary immunoglobulin A and S. mutans specific salivary immunoglobulin A concentration were measured using ELISA. The S. mutans counts, Lactobacillus counts and buffer capacity were measured with Dentocult test medium. The decayed and filled surface index of deciduous teeth in subjects with Down's syndrome was lower than in controls(p<0.001). The plaque index and total salivary immunoglobulin A concentration showed no difference, S. mutans specific salivary immunoglobulin A concentration and buffer capacity in subjects with Down's syndrome were lower than in controls(p<0.001). There was no significant difference between two groups in the S. mutans counts and Lactobacillus counts. In 9-11 year age group, S. mutans counts in subjects with Down's syndrome was lower than in controls(p<0.001) and S. mutans specific salivary immunoglobulin A concentration was lower(p<0.05). There was a high correlation among deciduous dental caries index and buffering capacity and S. mutans counts.

  • PDF

Prediction of Intravenous Immunoglobulin Nonresponse Kawasaki Disease in Korea (한국인에서 면역글로불린-저항성 가와사키병 환자의 예측)

  • Choi, Myung Hyun;Park, Chung Soo;Kim, Dong Soo;Kim, Ki Hwan
    • Pediatric Infection and Vaccine
    • /
    • v.21 no.1
    • /
    • pp.29-36
    • /
    • 2014
  • Purpose: The objective of this study was to find the predictors and generate a prediction scoring model of nonresponse to intravenous immunoglobulin in patients with Kawasaki disease. Methods: We examined 573 children diagnosed with KD at the Severance Children's Hospital between January 2009 and december 2012. We retrospectively reviewed their medical records. These patients were divided into 2 groups; the experimental group (N=433) and the validation group (N=140). Each group were divided into 2 groups the intravenous immunoglobulin nonresponders and the responders. Multivariate logistic regression analysis identified predictive factors of intravenous immunoglobulin nonresponders which make predictive scoring model. We practice internal validation and external validation. Results: Multivariate logistic regression analysis identified male, cervical lymphadenopathy, changes of the extremities, platelet, total bilirubin, alkaline phophatase, lactate dehydrogenase, C-reactive protein as significant predictors for nonresponse to intravenous immunoglobulin. We generated prediction score assigning 1 point for (1) male, (2) cervical lymphadenopathy, (3) changes of the extremities, (4) platelet (${\leq}368,000/mm^3$), (5) total bilirubin (${\geq}0.4mg/dL$), (6) alkaline phophatase (${\geq}227IU/L$), (7) lactate dehydrogenase (${\geq}268IU/L$), (8) C-reactive protein (>77.1 mg/dL). Using a cut-off point of 4 and more with this prediction score, we could identify the intravenous immunoglobulin nonresponder group. Sensitivity and specificity were 52.5% and 82.4% in experimental group and 37.8% and 81.8% in validation group, respectively. Conclusion: Our predictive scoring models had high specificity and low sensitivity in Korean patients. Therefore it is useful in predicting nonresponse to intravenous immunoglobulin with Kawasaki disease.

Changes of Bovine Colostral Immunoglobulin G on Processing Conditions (가공처리조건이 초유 Immunoglobulin G의 변화에 미치는 영향)

  • 이수원;양동훈;황보식;이승환
    • Food Science of Animal Resources
    • /
    • v.21 no.3
    • /
    • pp.265-271
    • /
    • 2001
  • We investigated changes of immunoglobulin G (IgG) concentrations by heating and drying condition. Also it is performed to group for commercial product by promoting of IgG preservation and reducing of protein denaturation. The result was that content of IgG in colostrum was higher than normal milk. Especially, IgG content of colostrum within 12 hrs after parturition was over 44.67mg/ml and it is 60 times of normal milk. IgG contents was reduced rapidly according as passage of the time. IgG content of the sample heating at 30min at 65$^{\circ}C$ was still a little higher that heating for 10sec at 72$^{\circ}C$. IgG denaturation of heat treatment at 100$^{\circ}C$ for 10sec was lower than at 85$^{\circ}C$ for 30min. We investigated the changes of IgG concentrations of kinds of market milk different with heating processing. This result showed that IgG denaturation ratio by ultra high temperature pasteurization (UHT) was higher than long time low temperature pasteurization (LTLT). On the other hands, IgG content by spray drying was 14.5mg/g and freezing drying was 10.8mg/g. It showed that denaturation of protein content by freezing drying was more than spray drying.

  • PDF