Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Identification of Epidermal Growth Factor Receptor(EGF-R) and Transforming Growth $Factor-{\alpha}(TGF-{\alpha})$ in both Malignant Gastric Adenocarcinoma and Adjacent Non-malignant Gastric Mucosa

위암조직과 정상조직에서의 표피성장인자 수용체와 변환성장인자의 규명

  • Published : 1994.04.01
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Abstract

The specimens used in this study were obtained from patients with primary gastric carcinoma and adjacent non-malignant mucosa from the same patients. Using the techniques of immunocyto chemicstry and in situ hybridization, transforming growth $factor-{\alpha}(TGF-{\alpha})$ and epiderimal growth factor receptor (EGF-R) nRNAs were identified. $TGF-{\alpha}$ was observed in macrophages and dividing tumor cells but, not in normal cells. EGF-R was observed both in malignant and non-malignant gastric tissues. Although normally, $TGF-{\alpha}$ is not seen in normal gastric tissues, $TGF-{\alpha}$ was discovered in the adjacent non-malignant tissue of histolgically normal, which strongly suggest that $TGF-{\alpha}$ is involved in the differentiation of cancer cells. Immunocytochemicstry using EMB-11 antibody identified the existence of macrophages which express $TGF-{\alpha}$ and EGF-R mRNA. Protein products of EGF-R was identfified using monoclonal antibody. Cancer cells were also identified in the non-malignant normal tissues by the method of immunocytochemicstry using carcino embryonic antigen (CEA)antibody. It is considered that the activity of $TGF-{\alpha}$ increased as tumor cell prolifierates. Immunocytochemistry and in situ hybridization techniques can be used to diagnose gastric cancer along with the use of ${\alpha}-feto$ protein and CEA.

원발성 위암환자로 확진받은 환자들의 암조직과 암조직 주위의 정상점막 조직을 대조군으로 사용하여, $TGF-{\alpha}$와 이에 대한 결합력을 갖고 있는 EGF-Receptor에 대한 mRNA를 면역세포화학적 방법과 in situ hybridization방법을 결합하여 규명하였다. 성장한 세포에서 발견되지 않는 $TGF-{\alpha}$가 위암환자의 조직학적으로는 정상적으로 간주되는 위점막 조직에서 발견된 점으로 미루어 $TGF-{\alpha}$가 암의 분화에 적극적으로 개입하고 있다는 증거가 된다. EMB-11 항체를 사용한 면역세포 화학적 방법에 의해 macrophage를 발견하고, macrophage cell에서 $TGF-{\alpha}$와 EGF-R mRNA가 발현됨을 규명할 수 있었다. 또한 단클론 항체를 이용해 EGF-R에 해당하는 단백질을 발견하였다. CEA를 이용한 면역세포화학 실험에서 정상으로 간주되는 위점막 조직에서 암 세포를 규명하였다. 특히, macrophage cell의 활동이 암의 증식과 더불어 증가하고 있다는 점을 관찰할 수 있었다. 위암과 검사 방법으로서 본 실험에서 사용된 면역세포화학적 기법과 in situ hybridization방법을 사용하여 생검을 통한 조직을 대상으로 성장인자에 대한 검사를 함으로써 정확한 위암의 발생과 진행에 대한 판단을 내리는데 이용할 수 있고 실용성이 있다고 사료된다.

Keywords

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