• 한국미생물·생명공학회지
• /
• 제10권3호
• /
• pp.205-209
• /
• 1982

The enzyme-linked immunosorbent assay using the so-called "double-sandwich"technique was applied to determine Clostridium botulinum type F toxin. Polystyrene tubes were coated with horse anti-type F toxin serum and then toxin sample was added. The tubes were subsequently treated with rabbit anti-type F toxin IgG and sheep anti-rabbit serum IgG-horseradish peroxidase conjugate. By this technique, about 10 mouse intraperitoneal 50% lethal doses (ip LD/50/) of type F toxin could be detected. Low back-ground reading was achieved with the use of phosphate-buffered saline containing 0.05% Tween 20 and 1% bovine serum albumin as diluents of rabbit IgG and conjugate. Addition of EDTA in the diluents of toxin increased ELISA extinction value significantly. No cross-reaction was observed with botulinum type A and B toxin, but type E toxin gave sleight cross-reaction.

• 한국환경독성학회:학술대회논문집
• /
• 한국환경독성학회 1996년도 제19회정기학술대회(The 19th Symposium of the Korean Society of Environmental Toxicology)
• /
• pp.53-53
• /
• 1996

• 한국어업기술학회:학술대회논문집
• /
• 한국어업기술학회 2003년도 춘계 수산관련학회 공동학술대회발표요지집
• /
• pp.156-157
• /
• 2003

In teleost, vitellogenin (Vtg) is synthesised in the liver in response to estrogens and transported by the blood to the growing oocytes where it is incorporated by micropincytosis (Selman and Wallace, 1982). Generally, Vtg is not induced in normal male fish but male fish are capable of synthesis Vtg in reponse to exogenous estrogen and xenoestrogens. (omitted)

• Parasites, Hosts and Diseases
• /
• 제56권2호
• /
• pp.113-119
• /
• 2018

Cryptosporidium species is an important cause of gastrointestinal infections globally. This study aimed to shed light on its role in diarrheic immunocompetent patients in Beni-Suef, Egypt and to compare three diagnostic methods. Two hundred diarrheic patients, $37{\pm}16.8year$ old, were enrolled. Stool samples were examined by light microscopy, using modified Ziehl-Neelsen stain (MZN) for Cryptosporidium spp. oocysts. Coproantigens were detected by sandwich ELISA. DNA molecular diagnosis was done by nested PCR. PCR yielded the highest detection rates (21.0%), compared to ELISA (12.5%) and MZN staining method (9.5%). The higher infection rates were in 20-40 year-old group, followed by 40-60 year-old. Association between epidemiologic factors was statistically not significant; positivity and gender, clinical manifestations, residence, source or water, or contact with animals. Cryptosporidiosis is an important enteric parasitic infection in Beni-Suef and PCR remains the gold standard for diagnosis.

• 한국동물위생학회지
• /
• 제41권2호
• /
• pp.79-83
• /
• 2018

This study compared serum concentrations of suppression of tumorigenicity 2 (ST2) and N-terminal pro-B-type natriuretic peptide (NT-proBNP) between healthy and heartworm- infected dogs. Eighteen heartworm-infected dogs and five healthy dogs were included in the study. Dogs were diagnosed and categorized by history, clinical signs, and blood assay, thoracic radiography, echocardiography, and commercial ELISA kit results. Serum samples were sent to the IDEXX reference laboratory for NT-proBNP measurement. ST2 was examined by using a canine interleukin 33 receptor ELISA kit with the quantitative sandwich ELISA method. The severely infected group showed significant elevation of NT-proBNP concentration over those of the control (P=0.03) and mildly infected (P=0.04) group. There were no significant difference in ST2 concentrations among the three groups. The usefulness of NT-proBNP as a cardiac biomarker in dogs with severe heartworm disease was confirmed by the results of this study. Further investigations to assess ST2 as a cardiac biomarker are warranted.

• Bulletin of the Korean Chemical Society
• /
• 제30권1호
• /
• pp.77-82
• /
• 2009

Thrombin activatable fibrinolysis inhibitor (TAFI) also known as plasma procarboxypeptidase B or U is a 60 kD glycoprotein, which is the major modulator of fibrinolysis in plasma. TAFI is a proenzyme, which is activated by proteolytic cleavage to an active carboxypeptidase B-like enzyme (TAFIa, 35.8 kD) by thrombin/thrombomodulin and plasmin. Modulation of fibrinolysis occurs when TAFIa enzymatically removes C-terminal lysine residues of partially degraded fibrin, thereby inhibiting the stimulation of tissue plasminogen activator (t-PA) modulated plasminogen activation. TAFIa undergoes a rapid conformational change at $37{^{\circ}C}$ to an inactive isoform called TAFIai. Potato tuber carboxypetidase inhibitor (PTCI) was shown to specifically bind to TAFIa as well as TAFIai. In this study, a novel immunoassay TAFIa/ai ELISA was used for quantitation of the two TAFI activation isoforms TAFIa and TAFIai. The ELISA utilizes PTCI as the capture agent and a double antibody sandwich technique for the detection. Low levels of TAFIa/ai antigen levels were detected in normal plasma and elevated levels were found in hemophilia A plasmas. TAFIa/ai antigen represents a novel marker to monitor fibrinolysis and TAFIa/ai ELISA may be a valuable assay for studying the role of TAFI in normal hemostasis and in pathological conditions.

• Pediatric Gastroenterology, Hepatology & Nutrition
• /
• 제3권2호
• /
• pp.175-180
• /
• 2000

목 적: Leptin은 지방세포에서 분비되어 hypothalamus에 작용함으로써 식욕과 에너지소모를 조절한다고 알려졌다. 그러나 비만아에서는 Leptin 수용체의 저항성 증가에 의해 비만이 지속된다고 보고된다. 최근들어 국내에서도 비만아에서의 Leptin 농도에 대해 많은 연구가 이루어지고 있으나 그 결과가 일치하지 않고 대부분의 연구는 Leptin RIA kit를 이용하여 이루어진 바 저자들은 human leptin ELISA kit를 이용하여 혈중 leptin 농도를 측정하여 ELISA법의 유용성을 규명하고 비만아와 정상아 및 연령과 성별에 따른 차이를 비교해 보고자 본 연구를 실시하였다. 방 법: 1999년 2월 1일부터 1999년 6월 30일까지 충남대학교병원에 내원한 아동을 대상으로 총 67명(남아 41명, 여아 26명)의 소아를 무작위로 추출 하였다. 1999년도 대한소아과학회의 신장별 표준체중치를 이용하여 각 연령별, 성별 신장대비 표준체중의 120% 이상 되는 환아를 비만으로 정의하여 비만아동 19명(남아 12명, 여아 7명)과 정상아동 48명(남아 29명, 여아 19명)으로 분류하였다. 67명의 대상아동에 대해 신장, 체중, 비만도, 체질량지수를 조사하고 ELISA법을 이용하여 Leptin 농도를 측정하였다. 이것을 비만군과 정상군, 체질량지수별, 성별, 연령별로 나누어 비교분석 하였다. 결 과: 1) 정상아의 평균 Leptin 치는 $7.69{\pm}8.83\;ng/ml$이었다. 2) 비만아에서 평균 Leptin 치는 $36.34{\pm}18.57\;ng/ml$이었다. 3) 체질량 지수가 20 이상인 군에서 20 미만인 군보다 혈중 leptin 치가 유의하게 높았다(p<0.01). 4) 10세 이상인 군에서 10세 미만인 군보다 유의하게 높았다(p<0.01). 5) 남녀간의 혈중 leptin 치는 유의한 차이가 없었다(p>0.05). 결 론: ELISA법을 이용한 혈중 leptin 치는 RIA법을 이용한 혈중 leptin 치와 같이 비만한 군에서 높게 나타났으며, 이에 관련된 인자로는 비만도, 체질량 지수 및 연령 등이 있었다. 특수 시설이 필요한 RIA법보다 일반 검사실에서 용이하게 측정할 수 있는 ELISA법이 널리 활용될 수 있을 것으로 사료된다.

• Asian Pacific Journal of Cancer Prevention
• /
• 제16권5호
• /
• pp.2043-2049
• /
• 2015

Background: Serum Golgi protein 73 (GP73) as a novel and potential marker for diagnosing hepatocellular carcinoma (HCC) have been found to be elevated in HCC patients and associated with clinical variables representing tumor growth and invasiveness. The aim of this study was to prepare a pair of monoclonal antibodys (mAbs) against GP73 and develop a newly designed double-antibody sandwich enzyme-linked immunosorbent assay (s-ELISA), which would be used in the detection of serum GP73 (sGP73) as well as in the diagnosis of HCC. Materials and Methods: Produced by prokaryotic expression, the purified recombinant GP73 (rGP73), produced by prokaryotic expression, was used to immunize the Balb/c mice. Two hybridoma cell lines against GP73 were obtained by fusing mouse Sp2/0 myeloma cells with spleen cells from the immunized mice. The titers of anti-GP73 mAb reached 1:243,000. Western blotting analysis and Immunohistochemistry staining revealed that anti-GP73 mAb could recognize GP73 protein. The double-antibody s-ELISA was successfully established and validated by 119 HCC and 103 normal serum samples. Results: showed that the detection limit of this method could reach 1.56 ng/ml, and sGP73 levels in HCC group (mean=190.6 ng/ml) were much higher than those of in healthy controls (mean=70.92 ng/ml). Conclusions: Results of our study not only showed that sGP73 levels of HCC patients were significantly higher than those of healthy controls, but also indicated that the laboratory homemade anti-GP73 mAbs could be the optimal tool used in evaluating sGP73 levels, which would provide a solid foundation for subsequent clinical applications.

• 한국식품과학회지
• /
• 제32권4호
• /
• pp.822-827
• /
• 2000

새우 알러지를 감소시키기 위한 방법으로써 감마선 조사기술의 이용 가능성을 평가하였다. 새우로부터 분리한 열안정성 단백질(HSP)과 병원에서 임상진단용으로 사용하는 새우 단백질 추출액을 1, 3, 5, 7, 10 kGy의 선량으로 감마선을 조사하였다. 단백질 추출액 및 HSP의 알러지성과 항원성의 변화를 mAb와 환자의 IgE를 사용한 ELISA법과 immunoblotting법으로 측정하였고, 단백질의 구조변화는 gel permeation chromatography와 SDS-PAGE로 관찰하였다. 환자의 IgE는 감마선 조사된 단백질 추출액과 HSP용액 모두에서 감마선 조사선량이 증가함에 따라 감소하였다. GPC-HPLC와 sandwich ELISA법으로 HSP를 정량하였을 때도 역시 감마선 조사선량이 증가함에 따라 감소하였다. SDS-PAGE pattern 변화에서 HSP는 감마선 조사에 의해 변화되어 더 큰 분자량으로 전환되었다. 이러한 결과는 감마선 조사가 새우 알러지 억제에 적용 할 수 있다는 가능성을 시사하였다.

• 생물정신의학
• /
• 제3권1호
• /
• pp.109-114
• /
• 1996

정신분열증에서 interleukin의 변화는 그 질환에서의 면역학적 가설의 부가적인 증거로 제시되어 왔다. 본 연구에서는 quantitative "sandwich" ELISA 법을 이용하여 26명의 정신분열증 환자를 대상으로 연령을 상응시킨 정상대조군과 비교해 IL-$1{\beta}$, IL-2, IL-6 농도의 차이가 있는지 알아보았다. 또한 정신분열증 환자에서 IL농도와 양성증상 및 음성증상, 연령, 유병기간 등의 임상변인과의 상관관계를 조사하여 다음과 같은 결론을 얻었다. 1) 정신분열증군이 정상대조군보다 IL-2 농도의 유의한 중가를 나타내었으며, IL-$1{\beta}$와 IL-6는 유의한 차이가 없었다. 2) 정신분열증군에서 IL-2, IL-6와 음성증상간의 유의한 상관관계가 있었다. 본 연구는 정신분열증의 연역학적 가설을 지지하고 있으며, IL은 정신분열증의 음성증상에 관련된다고 생각된다. 앞으로 국내에서도 이러한 환자들의 임상적 특징, 진단, 치료에 관심을 갖아야 할 것으로 사료된다.