• Journal of Yeungnam Medical Science
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• 제12권1호
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• pp.48-55
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• 1995

1995년 1월에서 1995년 3월까지 심근 손상이 의심되는 환자 및 정상대조군에 대한 TnT, 총 LD, 총 CK 및 각 동위효소에 대한 고찰에서 다음과 같은 결과를 얻었다. Tropohin T는 정상인에서 $0.01{\pm}0.02{\mu}g/L$, 급성심근경색환자에서 최고치는 4.7-24.2 ${\mu}g/L$로 나타났으며, 초기검사에서 정상범위에 속한 환자에서 6시간 후 추적조사에서는 모든 증례에서 1.0 ${\mu}g/L$이상으로 나타났다. 총 LD는 1-3일경에 최고치를 보인 후 점차적으로 감소되었으나, LD1/LD2 비율은 대부분의 환자에서 10일 이상 1.0이상으로 유지되므로, 상대적으로 늦은 시간에 내원한 경우 총 LD와 LD1/LD2 비율이 진단에 유용할 것으로 사료되었다. 총 CK 및 CK-MB인 경우 대부분의 환자에서 3-4일 후 정상 범위로 떨어지므로, 조기진단에는 도움이 되나, 장기간의 추적조사에는 유용성이 없는 것으로 사료되었다. 총 Lactate Dehydrogenase, LD1/LD2 비율, 총 Creatine Kinase, CK-MB와 Troponin T의 상호비교에서 Troponin T가 상대적으로 초기 혹은 장기간 경과된 경우에도 유용한 지표로 사료되었다.

• Parasites, Hosts and Diseases
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• 제34권4호
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• pp.215-224
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• 1996

작은와포자충의 세포골격 단백질 분포를 알아보기 위하여 actin, tropomyosin, $\alpha$-actinin 및 troponin-T의 분포를 이중면역 황금표지법 (double immunogold labeling method)으로 관찰하 였다 관찰된 모든 발육 단계의 충체에서 매우 많은 양의 tropomyosin이 세포질 및 세포막에 분포하고 있음이 밝혀졌으며 actin보다도 더 많은 양이 관찰되었다. ${\alpha}-actinin$의 경우는 주로 세포막에 소량이 분포하였으며 Troponin-T는 어느 발육 단계에서도 관찰되지 않았다 이 연구의 결과 tropomyosin의 분포 정도도 미루어 볼 때 이 단백질이 작은와포자충에서 매우 중요한 역할을 수행할 것으로 추측되며, 주로 세포막에 다량으로 분포하는 actin, tropomyosin 및 ${\alpha}-actinin$은 면역진단 및 면역치료의 대상으로 이용할 가능성이 있을 것으로 생각된다.

• Journal of Yeungnam Medical Science
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• 제18권1호
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• pp.13-29
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• 2001

The enzyme activities of creatine kinase (CK), its isoenzyme MB (CK-MB) and of lactate dehydrogenase isoenzyme 1 (LD-1) have been used for years in diagnosing patients with chest pain in order to differentiate patients with acute myocardial infarction (AMI) from non-AMI patients. These methods are easy to perform as automated analyses, but they are not specific for cardiac muscle damage. During the early 90's the situation changed. First, creatine kinase ME mass (CK-MB mass) replaced the measurement of CK-MB activity. Subsequently cardiac-specific proteins, troponin T (cTnT) and troponin I (cTnI) appeared and displacing LD-1 analysis. However, troponin concentrations in blood increase only from four to six hours after onset of chest pain. Therefore a rapid marker such as myoglobin, fatty acid binding protein or glycogen phosphorylase BB could be used in early diagnosis of AMI. On the other hand, CK-MB isoforms alone may also be useful in rapid diagnosis of cardiac muscle damage. Myoglobin, CK-MB mass, cTnT and cTnI are nowadays widely used in diagnosing patients with acute chest pain. Myoglobin is not cardiac-specific and therefore requires supplementation with some other analyses such as troponins to support the myoglobin value. Troponins are very highly cardiac-specific. Only the sera of some patients with severe renal failure, which requires hemodialysis, have elevated cTnT and/or cTnI without there being any evidence of cardiac damage. The latest studies have shown that elevated troponin levels in sera of hemodialysis patients point to an increased risk of future cardiac events in a similar manner to the elevated troponin values in sera of patients with unstable angina pectoris. In addition, the bedside tests for cTnT and cTnI alone- or together with myoglobin and CK-ME mass can be used instead of quantitative analyses in the diagnosis of patients with chest pain. These rapid tests are easy to perform and they do not require expensive instrumentation. For the diagnosis of patient with chest pain, routinely myoglobin and CK-ME mass measurements should be performed whenever they are requested (24 h/day) and cTnT or cTnI on admission to the hospital and then 4-6 and 12 hours later and maintained less than 10% in imprecision.

• Journal of Korean Neurosurgical Society
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• 제45권6호
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• pp.355-359
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• 2009

Objective : It has been suggested that elevated cardiac troponin T (cTnT) level is a marker of increased risk of mortality in acute ischemic stroke and subarachnoid hemorrhage (SAH). However, the association of serum cTnT level and prognosis of intracerebral hemorrhage (ICH) has been sparsely investigated. The aim of this study was to identify the relationship between cTnT level and the outcome in patients with spontaneous ICH. Methods : We retrospectively investigated 253 patients identified by a database search from records of patients admitted in our department for ICH between January 1, 2003 and December 31, 2007. The patients were divided into 2 groups; the patients in group 1 (n=225) with serum cTnT values of 0.01 ng/mL or less, and those in group 2 (n=28) with serum cTnT values greater than 0.01 ng/mL. Results : The serum cTnT level was elevated in 28 patients. There were significant differences in sex, hypertension, creatine kinase-myocardial band, midline shift, side of hematoma, and presence of intraventricular hemorrhage between the 2 groups. Logistic regression analysis identified the level of consciousness on admission, cTnT and midline shift as independent predictors of hospital mortality. Conclusion : Theses results suggest that increased serum cTnT level at admission is associated with in-hospital mortality and the addition of a serum cTnT assay to routine admission testing should be considered in patients with ICH.

• 대한의생명과학회지
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• 제6권4호
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• pp.281-288
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• 2000

심장수술에 따른 백혈구의 활성화는 여러 염증성 물질을 생성시켜 수술 후 병태생리에 깊이 관여한다. 본 연구는 심장수술 동안 백혈구의 과립성분인 myeloperoxidase의 농도 변화와 심장 및 폐에 대한 영향을 규명하기 위해 시행되었다. 심장수술 전후로 말초혈액 총 백혈구 수 및 분획세포 수와 관상정맥 혈액의 myeloperoxidase 농도 (MPO) 및 troponin-T 농도 (TnT), 그리고 폐혈관 저항을 측정하였다. 수술 직후, 호중구 수의 상승에 기인한 총 백혈구 수의 증가가 있었고 (p＜0.01), MPO 및 TnT 역시 증가하였으나 (p＜0.05), 폐혈관 저항은 감소하였다(p＜0.05). 수술 후, MPO는 TnT, 총 백혈구 수, 호중구 수, 그리고 심장수술 소요시간과 각각 양의 상관관계가 있었다(p＜0.05). 수술 후 폐혈관 저항은 총 백혈구 수 및 호중구 수와 각각 음의 상관성이 있었다(p<0.05). 본 연구의 결과들은 심장수술이 호중구로 부터 MPO 분비를 증가시키며, 유리된 MPO는 폐보다는 심장에 유해한 효과를 미칠 수 있고 호중구의 또 다른 기전이 수술 후 폐 손상에 관여할 수 있음을 시사하고 있다.

• Journal of Chest Surgery
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• 제32권11호
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• pp.971-977
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• 1999

Background: Immunologic and inflammatory responses of cardiopulmonary bypass(CPB) influence postoperative mortality and morbidity with multiple organ injury. It has been reported that ischemia/reperfusion induced-myocardial injury during CPB is causative of release of inflammatory cytokines such as interleukin-6(IL-6) and tumor necrosis factor-$\alpha$ (TNF-$\alpha$). The purpose of this study was to detect the time course of the activated cytokine and troponin-T(TnT), and to examine the correlation between such parameters during CPB. Material and Method: The serial samples were collected from arterial blood via radial arterial catheter in 23 patients who are underwent open heart surgery (OHS) with CPB, the IL-6, TNF-$\alpha$ and TnT were checked. Result: \circled1 IL-6, TNF$\alpha$- and TnT concentration increased significantly during CPB with a peaking level of CPB-off (p 0.05). \circled2 IL-6 had highly positive correlation with aortic cross clamping time and total bypass time(r=0.80, 0.78; p 0.05, respectively). \circled3 There was no correlation among IL-6, TNF-$\alpha$ and TnT. Conclusion: In conclusion, these data showed that elevated production of serum IL-6 during CPB was attributable to ischemia/reperfusion induced-myocardial damage. IL-6 will become a new and sensitive biological marker in assessment of myocardial damage during OHS with CPB. However, further studies will be needed to apply IL-6 in more patient population.

• 대한흉부심장혈관외과학회:학술대회논문집
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• 대한흉부외과학회 1996년도 제 28차 추계학술대회 및 총회 대한흉부외과학회
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• pp.20-20
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• 1996

• 대한흉부심장혈관외과학회:학술대회논문집
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• 대한흉부외과학회 1996년도 제 28차 추계학술대회 및 총회 대한흉부외과학회
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• pp.12-12
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• 1996

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2004년도 봄 학술발표논문집 Vol.31 No.1 (B)
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• pp.307-309
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• 2004

급성 심근경색 진단용 DNA 컴퓨팅 시스템 모듈로서, 트로포닌 I (troponin I, Tnl). 트로포닌 T (troponin T, TnT). 미오글로빈 (myoglobin), C-반응 단백질 (C-reactive protein, CRP) 과 각각 결합할 수 있는 네 가지 종류의 앱타머틀 선정하고, 이의 개발을 시도하여, 그 중 첫 번째로 C-반응 단백질-결합 앱타머를 SELEX 기법을 이용하여 선별해내었다. 또한, 선별된 앱타머 염기서열에 기초하여 각각 10-mer 길이의 FDNA 와 QDNA 를 제작하고, 표적 단백질 (CRP) 과 혼합시켜 형광발현 변화의 추이를 살펴보았다. 앱타머 및 FDNA. QDNA 가 결합할 경우에는 형광감쇄효과가 발생하므로, 형광감쇄효과가 일어나지 않은 경우에 비하여 현저하게 형광측정값이 저조하게 나타나는 현상을 확인할 수 있었다. 향후 연구로, 나머지 세 가지 종류의 앱타머를 SELEX기법을 이용하여 선별해내고. 기확보된 C-반응 단백질-결합 앱타머 모듈과 함께 논리회로를 구성하는 DNA 컴퓨팅 칩을 제작할 예정이다.

• Korean Journal of Radiology
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• 제20권5호
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• pp.709-718
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• 2019

Objective: To investigate the association of myocardial blood flow (MBF) quantified by dynamic computed tomography (CT) myocardial perfusion imaging (MPI) with troponin level and left ventricle (LV) function in patients with ST-segment elevated myocardial infarction (STEMI). Materials and Methods: Thirty-five STEMI patients who successfully had undergone reperfusion treatment within 1 week of their infarction were consecutively enrolled. All patients were referred for dynamic CT-MPI. Serial high-sensitivity troponin T (hs-TnT) levels and left ventricular ejection fraction (LVEF) measured by echocardiography were recorded. Twenty-six patients with 427 segments were included for analysis. Various quantitative parameters derived from dynamic CT-MPI were analyzed to determine if there was a correlation between hs-TnT levels and LVEF on admission and again at the 6-month mark. Results: The mean radiation dose for dynamic CT-MPI was 3.2 ± 1.1 mSv. Infarcted territories had significantly lower MBF (30.5 ± 7.4 mL/min/100 mL versus 73.4 ± 8.1 mL/min/100 mL, p < 0.001) and myocardial blood volume (MBV) (2.8 ± 0.9 mL/100 mL versus 4.2 ± 1.1 mL/100 mL, p = 0.044) compared with those of reference territories. MBF showed the best correlation with the level of peak hs-TnT (r = -0.682, p < 0.001), and MBV showed a moderate correlation with the level of peak hs-TnT (r = -0.437, p = 0.026); however, the other parameters did not show any significant correlation with hs-TnT levels. As for the association with LV function, only MBF was significantly correlated with LVEF at the time of admission (r = 0.469, p = 0.016) and at 6 months (r = 0.585, p = 0.001). Conclusion: MBF quantified by dynamic CT-MPI is significantly inversely correlated with the level of peak hs-TnT. In addition, patients with lower MBF tended to have impaired LV function at the time of their admission and at 6 months.