Nuclear Medicine Methods of Rejection Diagnosis in Transplanted Rat Model

심장 이식된 백서에서의 거부반응 진단의 핵의학적 방법

  • Chung, Won-Sang (Dept. of Thoracic and Cardiovascular Surgery, College of Medicine, Hanyang University) ;
  • Kim, Sang-Heon (Dept. of Thoracic and Cardiovascular Surgery, College of Medicine, Hanyang University) ;
  • Kim, Hyuck (Dept. of Thoracic and Cardiovascular Surgery, College of Medicine, Hanyang University) ;
  • Kim, Young-Hak (Dept. of Thoracic and Cardiovascular Surgery, College of Medicine, Hanyang University) ;
  • Kang, Jung-Ho (Dept. of Thoracic and Cardiovascular Surgery, College of Medicine, Hanyang University) ;
  • Choi, Yun-Young (Dept. of Nuclear Medicine, College of Medicine, Hanyang University) ;
  • Lee, Chul-Beom (Dept. of Thoracic and Cardiovascular Surgery, College of Medicine, Hanyang University, Guri Hospital)
  • 정원상 (한양대학교 의과대학 흉부외과학교실) ;
  • 김상헌 (한양대학교 의과대학 흉부외과학교실) ;
  • 김혁 (한양대학교 의과대학 흉부외과학교실) ;
  • 김영학 (한양대학교 의과대학 흉부외과학교실) ;
  • 강정호 (한양대학교 의과대학 흉부외과학교실) ;
  • 최윤영 (한양대학교 의과대학 핵의학교실) ;
  • 이철범 (한양대학교 의과대학 구리병원 흉부외과학교실)
  • Published : 2003.06.01

Abstract

Background: An accurate diagnosis of the severity of the rejection after a heart transplantation relies on endomyo-cardial biopsy, but because of its invasiveness and the need for repeated examination makes it is an inappropriate monitoring method. Therefore, we have tried to find a monitoring method that is continuous and less invasive. Material and Method: Heterotopic heart transplantation using Ono-Lindsey Method was done in 20 rats, and then $^{99m}$ Tc-Pyrophosphate (PYP) scan was done after a month, Uptake ratio of transplanted heart to vertebrae (H/V) was obtained to be compared with the biopsy result. Result: Rejection was defined when the H/V uptake ratio was higher than 0.09, and we compared the uptake ratio with the results of biopsy. The result was true positives was 3, true negatives 12, false negatives 2, andfalse positives 3. Therefore sensitivity was 60% and specificity was 80%, diagnostic value was 75%. Conclusion: $^{99m}$Tc-Pyrophosphate (PYP) scan was a useful method for the evaluation of the heart transplantation rejection and it will be helpful for monitoring rejection as an non-invasive and simple method.hod.

배경: 장기 심장 이식 후에 나타나는 거부반응의 정도와 상태에 대한 정확한 진단은 내심근 조직검사 (endomyocardial biopsy)로 이루어지고 있으나, 이 방법은 환자에 침습적이고 보다 자주 시행하여 감시하기에는 부적합하여, 덜 침습적이고 계속 지속적으로 감시할 수 있는 방법을 찾고자 하였다. 대상 및 방법: 250~300 gm 정도의 백서에서 이소성의 심장이식(heterotopic heart transplantation)을 Ono-Lindsey Method로 시행한 후 1개월 후에 $^{99m}$ Tc-pyrophosphate (PYP) 1.5 mCi를 꼬리 정맥을 통해 주입한 후 스캔(scan)을 시행하고 심장과 척추의 섭취비를 구하여 이식된 심장의 거부반응에 민감하게 반응할 수 있을 지에 대해 조직 검사와 비교관찰 하였다. 걸과: 20마리의 이식된 심장에 $^{99m}$ Tc-PYP스캔에서의 심장/척추 섭취비와 조직 검사 결과를 분석하여 심장/척추 섭취비가 0.09 이상을 거부반응이 있는 것으로 판정하였을 때 20마리에서 진양성 3예, 진음성 12예, 가양성 3예, 가음성 2예로 예민도 (Sensitivity) 60%,특이도(Specificity) 80%의 결과를 얻었다. 걸론: 이식된 장기의 거부반응이 장기이식의 예후에 미치는 중요한 원인이 되므로, 이에 대한 조기 진단할 수 있는 방법으로 $^{99m}$ Tc-PYP스캔이 유용하였으며, 비침습적이고 간단한 검사방법이므로 거부반응 여부를 감시하는 데 도움이 될 것으로 판단된다.

Keywords

References

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