형광기관지내시경을 이용한 생검조직에서 병리조직학적 분류, 세포증식능, p53과K-ras 유전자 돌연변이 분석
Histopathologic Findings, and p53 and K-ras Mutational Analysis in Biopsy Specimens Using Fluorescence Bronchoscopy
김영식, 박설희, 정명희, 최은창, 박이용, 김한겸, 김인선,
소속 상세정보
김영식 ( Kim Young-Sik )
고려대학교 의과대학 병리학교실
박설희 ( Park Seol-Hee )
고려대학교 의과대학 병리학교실
정명희 ( Jung Myung-Hee )
고려대학교 의과대학 병리학교실
최은창 ( Choi Eun-Chang )
고려대학교 의과대학 병리학교실
박이용 ( Park I-Yong )
고려대학교 의과대학 병리학교실
김한겸 ( Kim Han-Kyeom )
고려대학교 의과대학 병리학교실
김인선 ( Kim In-Sun )
고려대학교 의과대학 병리학교실
KMID : 0357920000340080550
Abstract
A fluorescence bronchoscope system has been developed for detecting early lung cancer including dysplasia and carcinoma in situ. To determine the histologic findings and genetic alterations of the lung tissues, which were biopsied by the fluorescence bronchoscope, we analyzed 104 specimens from 62 heavy smokers for their histopathology, cell proliferation index, and genetic mutations of p53 and K-ras. We used immunohistochemistry for MIB-1 and p53, and PCR-SSCP and direct DNA sequencing for p53 and K-ras. The histology was variable from reactive conditions to invasive cancers, and consisted of basal cell hyperplasia (26.9%), dysplasia (4.8%), carcinoma in situ (1.9%), squamous cell carcinoma (7.7%), adenocarcinoma (4.8%), and small cell carcinoma (10.6%). The cellular proliferation index of the lesions increased as their aggressiveness increased. p53 and K-ras mutations were detected in 33.7% and 14.4% of all tissues, respectively. In dysplasia, p53 and K-ras mutations were observed in 3 of 5 and in 2 of 5 tissues, respectively. However, these genetic alterations were not found in carcinoma in situ. Interestingly, 28.6% of basal cell hyperplasia showed p53 mutations. In conclusion, these data suggest that the biopsy specimens using fluorescence bronchoscopy show variable histologic findings, ranging from reactive conditions to invasive cancers. In addition, some of the dysplastic lesions are related to p53 and K-ras mutations, although these genetic alterations are also seen in basal cell hyperplasia.
키워드
Early lung cancer;Fluorescence bronchoscopy;p53;K-ras
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