Genomic profiling of gastric carcinoma in situ and adenomas by array-based comparative genomic hybridization.
Although genomic copy number aberrations (CNAs) of gastric carcinoma at the advanced stage have already been extensively characterized by array comparative genomic hybridization (array CGH) analysis, those of gastric carcinoma in situ (CIS) are still poorly understood. Furthermore, no reports have demonstrated correlations between CNAs and histopathological features of gastric adenoma. In this study, we investigated CNAs of 20 gastric CISs (Vienna category 4.2) and 20 adenomas including seven low-grade adenomas (LGA; Vienna category 3) and 13 high-grade adenomas (HGA; Vienna category 4.1), using oligonucleotide-based array CGH. The most frequent aberrations in CIS were gains at 8q (85%) and 20q (50%), and losses at 5q (50%) and 17p (50%), suggesting that these CNAs are involved in the development of CIS. We found that the pattern of CNAs in HGA was quite different from that in LGA. The most frequent CNAs in HGA were gains at 8q (62%) and 7pq (54%), whereas those in LGA were gain at 7q21.3-q22.1 (57%) and loss at 5q (43%). Interestingly, gains at 8q and 7pq, both of which occurred most frequently in HGA, were not detected in any cases of LGA. Of note, 8q gain was detected most frequently in both HGA and CIS but was undetected in LGA. Since HGA is believed to have a higher risk of progression to invasive carcinoma than LGA, these data suggest that 8q gain is important for the malignant transformation of gastric adenoma.
Uchida
Masahiro
M
Department of Molecular Pathology, Oita University, Oita, Japan.
Tsukamoto
Yoshiyuki
Y
Uchida
Tomohisa
T
Ishikawa
Yuta
Y
Nagai
Takayuki
T
Hijiya
Naoki
N
Nguyen
Lam Tung
LT
Nakada
Chisato
C
Kuroda
Akiko
A
Okimoto
Tadayoshi
T
Kodama
Masaaki
M
Murakami
Kazunari
K
Noguchi
Tsuyoshi
T
Matsuura
Keiko
K
Tanigawa
Masato
M
Seto
Masao
M
Ito
Hisao
H
Fujioka
Toshio
T
Takeuchi
Ichiro
I
Moriyama
Masatsugu
M
D000236:Adenoma / Q000235:genetics* / Q000473:pathology; D000368:Aged; D000369:Aged, 80 and over; D002278:Carcinoma in Situ / Q000235:genetics* / Q000473:pathology; D002471:Cell Transformation, Neoplastic / Q000235:genetics; D002869:Chromosome Aberrations; D055028:Comparative Genomic Hybridization; D018450:Disease Progression; D005260:Female; D020869:Gene Expression Profiling / Q000379:methods; D020022:Genetic Predisposition to Disease; D006801:Humans; D008297:Male; D008875:Middle Aged; D008957:Models, Genetic; D013274:Stomach Neoplasms / Q000235:genetics* / Q000473:pathology