» Articles » PMID: 35939123

Clinicopathological and Molecular Characterization of Early Gastric Adenocarcinoma in Helicobacter Pylori-uninfected Patients: Emphasis on Differentiated Gastric Adenocarcinoma

Abstract

Background: Recently, Helicobacter pylori (HP)-uninfected gastric mucosal cancer has been reported; however, the clinicopathological and molecular features of HP-uninfected gastric cancer have not been elucidated.

Methods: We evaluated the clinicopathological, immunohistochemical, and genetic alterations in HP-uninfected early gastric adenocarcinoma using next-generation sequencing (NGS).

Results: Among 968 primary early gastric carcinomas, 64 (6.6%) were HP-uninfected gastric adenocarcinoma and were pathologically classified as gastric adenocarcinoma of fundic-gland type (GA-FG, n = 39), differentiated gastric adenocarcinoma (DGA, n = 16), and signet-ring cell carcinoma (SRCC, n = 9). Based on the expression profile of the mucin core protein, DGAs were classified into a gastrointestinal phenotype showing either MUC5AC or MUC6 expression and MUC2 or CD10 expression simultaneously (n = 5), and a gastric phenotype (n = 11) showing either MUC5AC or MUC6 expression. All DGAs with a gastrointestinal phenotype shared similar endoscopic characteristics, such as reddish depressed lesions in the antrum. In contrast, DGAs with a gastric phenotype exhibited several distinct endoscopic features, including a raspberry-shaped appearance and whitish flat-elevated appearance; the former expressed only MUC5AC and the latter exhibited co-expression of MUC5AC and MUC6. Among 16 HP-uninfected DGAs, seven were subjected to NGS. APC was recurrently mutated in DGA (42.9%) and was enriched in DGAs with a gastrointestinal phenotype (75%).

Conclusions: Overall, HP-uninfected gastric adenocarcinomas showed distinct clinicopathologic and endoscopic characteristics. Furthermore, HP-uninfected DGAs, especially those with a gastrointestinal phenotype, may be characterized by recurrent APC mutations.

Citing Articles

Intestinal metaplasia key molecules and UPP1 activation via Helicobacter pylori /NF-kB: drivers of malignant progression in gastric cancer.

Chen X, Zhou B, Wang S, Jiang X, Ping Y, Xia J Cancer Cell Int. 2024; 24(1):399.

PMID: 39695769 PMC: 11657005. DOI: 10.1186/s12935-024-03598-6.


Trends of Early -Uninfected Gastric Cancer in an Aging Regional Area.

Maeda H, Sasaki F, Ooi T, Uehara S, Yano H, Sameshima Y J Clin Med. 2024; 13(6).

PMID: 38542051 PMC: 10971114. DOI: 10.3390/jcm13061827.


Clinicopathological and endoscopic features of Helicobacter pylori infection-negative gastric cancer in Japan: a retrospective study.

Imamura K, Yao K, Nimura S, Kanemitsu T, Miyaoka M, Ono Y Clin Endosc. 2024; 57(4):486-494.

PMID: 38514987 PMC: 11294854. DOI: 10.5946/ce.2023.258.


Prevalence of Gastric Epithelial Tumors in Helicobacter pylori-uninfected Individuals Undergoing a Medical Checkup.

Okimoto E, Adachi K, Ebisutani Y, Ishimura N, Ishihara S Intern Med. 2024; 63(16):2251-2258.

PMID: 38220193 PMC: 11414374. DOI: 10.2169/internalmedicine.2955-23.


Clinicopathologic differences of gastric neoplasms between Helicobacter pylori-infected and -naïve patients: a multicenter retrospective analysis.

Kotani S, Shibagaki K, Hirahara N, Hasegawa N, Tanabe R, Ebisutani Y J Gastroenterol. 2023; 59(1):1-10.

PMID: 37855982 DOI: 10.1007/s00535-023-02050-2.


References
1.
Uemura N, Okamoto S, Yamamoto S, Matsumura N, Yamaguchi S, Yamakido M . Helicobacter pylori infection and the development of gastric cancer. N Engl J Med. 2001; 345(11):784-9. DOI: 10.1056/NEJMoa001999. View

2.
Matsuo T, Ito M, Takata S, Tanaka S, Yoshihara M, Chayama K . Low prevalence of Helicobacter pylori-negative gastric cancer among Japanese. Helicobacter. 2011; 16(6):415-9. DOI: 10.1111/j.1523-5378.2011.00889.x. View

3.
Yamamoto Y, Fujisaki J, Omae M, Hirasawa T, Igarashi M . Helicobacter pylori-negative gastric cancer: characteristics and endoscopic findings. Dig Endosc. 2015; 27(5):551-61. DOI: 10.1111/den.12471. View

4.
Yamada A, Kaise M, Inoshita N, Toba T, Nomura K, Kuribayashi Y . Characterization of Helicobacter pylori-Naïve Early Gastric Cancers. Digestion. 2018; 98(2):127-134. DOI: 10.1159/000487795. View

5.
Horiuchi Y, Fujisaki J, Ishizuka N, Omae M, Ishiyama A, Yoshio T . Study on Clinical Factors Involved in Helicobacter pylori-Uninfected, Undifferentiated-Type Early Gastric Cancer. Digestion. 2017; 96(4):213-219. DOI: 10.1159/000481817. View