Aneuploidy of tumor cells in cases of gastric cancer with esophageal invasion: Another indicator of poor prognosis

Gastric cancer (GC) is the fourth-most common cancer in the world, with an estimated 1.034 million new cases in 2015, and the third-highest cause of cancer deaths, estimated at 785,558, in 2014. Early diagnosis and treatment greatly affect the survival rate in patients with GC: the 5‐year survival rate of early GC reaches 90%‐95%, while the mortality rate significantly increases if GC develops to the late stage. Recently, studies for the role of RhoA in the diseases have become a hot topic, especially in the development of tumors. A study found that RhoA can regulate actin polymerization, cell adhesion, motor-myosin, cell transformation, and the ability to participate in the activities of cell movement, proliferation, migration, which are closely related to the invasion and metastasis of tumor cells. However, the specific role of RhoA in tumor cells remains to be studied. Therefore, our current study aimed to briefly review the role of RhoA in GC, especially for its associated signaling pathways involved in the GC progression.

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Dysregulated KRAS gene-signaling axis and abnormal chromatin remodeling drive therapeutic resistance in heterogeneous-sized circulating tumor cells in gastric cancer patients

Cancer Letters ◽

10.1016/j.canlet.2021.06.002 ◽

2021 ◽

Author(s):

Yang Chen ◽

Yanyan Li ◽

Changsong Qi ◽

Cheng Zhang ◽

Dan Liu ◽

...

Keyword(s):

Gastric Cancer ◽

Cancer Patients ◽

Tumor Cells ◽

Circulating Tumor Cells ◽

Chromatin Remodeling ◽

Therapeutic Resistance ◽

Kras Gene ◽

Signaling Axis ◽

Gastric Cancer Patients

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Identification of novel autoantibodies in ascites of relapsed paclitaxel-resistant gastric cancer with peritoneal metastasis using immunome protein microarrays and proteomics

Cancer Biomarkers ◽

10.3233/cbm-203142 ◽

2021 ◽

pp. 1-10

Author(s):

Zhongyin Yang ◽

Chao Yan ◽

Wentao Liu ◽

Wei Xu ◽

Chen Li ◽

...

Keyword(s):

Gastric Cancer ◽

Effective Treatment ◽

Peritoneal Metastasis ◽

Quantitative Proteomics ◽

Poor Prognosis ◽

Protein Microarrays ◽

Tandem Mass ◽

Tandem Mass Tag ◽

Resistant Group ◽

Potential Biomarkers

BACKGROUND: Gastric cancer (GC) patients with peritoneal metastasis usually have extremely poor prognosis. Intraperitoneal infusion of paclitaxel (PTX) provides an effective treatment, but relapse and PTX-resistance are unavoidable disadvantages, and it is difficult to monitor the occurrence of PTX-resistance. OBJECTIVE: The aim of this study was to explore novel autoantibodies in the ascites of individuals with relapsed PTX-resistant GC with peritoneal metastasis. METHODS: Ascites samples were collected before PTX infusion and after the relapse in 3 GC patients. To determine the expression of significantly changed proteins, we performed autoantibody profiling with immunome protein microarrays and tandem mass tag (TMT) quantitative proteomics, and then, the overlapping proteins were selected. RESULTS: Thirty-eight autoantibodies that were differentially expressed between the ascites in the untreated group and relapsed PTX-resistant group were identified. For confirmation of the results, TMT quantitative proteomics was performed, and 842 dysregulated proteins were identified. Four proteins, TPM3, EFHD2, KRT19 and vimentin, overlapped between these two assays. CONCLUSIONS: Our results first revealed that TPM3, EFHD2, KRT19 and vimentin were novel autoantibodies in the ascites of relapsed PTX-resistant GC patients. These autoantibodies may be used as potential biomarkers to monitor the occurrence of PTX-resistance.

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LAMB1 Is Related to the T Stage and Indicates Poor Prognosis in Gastric Cancer

Technology in Cancer Research & Treatment ◽

10.1177/15330338211004944 ◽

2021 ◽

Vol 20 ◽

pp. 153303382110049

Author(s):

Tao Ran ◽

ZhiJi Chen ◽

LiWen Zhao ◽

Wei Ran ◽

JinYu Fan ◽

...

Keyword(s):

Gastric Cancer ◽

Poor Prognosis ◽

Hazard Models ◽

Proportional Hazard ◽

Kegg Analysis ◽

Proportional Hazard Models ◽

Cox Proportional Hazard ◽

Kaplan Meier ◽

Cox Proportional Hazard Models ◽

Gastric Cancer Patients

Background and Objective: Gastric cancer (GC) is a common tumor malignancy with high incidence and poor prognosis. Laminin is an indispensable component of basement membrane and extracellular matrix, which is responsible for bridging the internal and external environment of cells and transmitting signals. This study mainly explored the association of the LAMB1 expression with clinicopathological characteristics and prognosis in gastric cancer. Methods: The expression data and clinical information of gastric cancer patients were downloaded from The Cancer Genome Atlas (TCGA) and Asian Cancer Research Group (ACRG). And we analyzed the relationship between LAMB1 expression and clinical characteristics through R. CIBERSORTx was used to calculate the absolute score of immune cells in gastric tumor tissues. Then COX proportional hazard models and Kaplan-Meier curves were performed to evaluate the role of LAMB1 and its influence on prognosis in gastric cancer patients. Finally, GO and KEGG analysis were applied for LAMB1-related genes in gastric cancer, and PPI network was constructed in Cytoscape software. Results: In the TCGA cohort, patients with gastric cancer frequently generated LAMB1 gene copy number variation, but had little effect on mRNA expression. Both in the TCGA and ACRG cohorts, the mRNA expression of LAMB1 in gastric cancer tissues was higher than it in normal tissues. All patients were divided into high expression group and low expression group according to the median expression level of LAMB1. The elevated expression group obviously had more advanced cases and higher infiltration levels of M2 macrophages. COX proportional hazard models and Kaplan-Meier curves revealed that patients with enhanced expression of LAMB1 have a worse prognosis. GO/KEGG analysis showed that LAMB1-related genes were enriched in PI3K-Akt signaling pathway, focal adhesion, ECM-receptor interaction, etc. Conclusions: The high expression of LAMB1 in gastric cancer is related to the poor prognosis of patients, and it may be related to microenvironmental changes in tumors.

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Gastric cancer with repeated metastasis in the colonic lumen: a case report and multi-surgical experience

Journal of International Medical Research ◽

10.1177/03000605211018420 ◽

2021 ◽

Vol 49 (5) ◽

pp. 030006052110184

Author(s):

Yi Wang ◽

Peiqing Ma ◽

Kan Liu ◽

Dongkui Xu ◽

Qian Liu

Keyword(s):

Gastric Cancer ◽

Gastric Carcinoma ◽

Poor Prognosis ◽

Partial Gastrectomy ◽

Radical Resection ◽

Surgical Experience ◽

Colonic Lumen ◽

Poorly Differentiated ◽

Gastric Stump Carcinoma ◽

Peritoneal Spread

Poorly differentiated gastric adenocarcinoma is commonly associated with lymph node metastasis, peritoneal spread, and liver metastasis but rarely with intraintestinal metastasis. Most patients with metastatic gastric carcinoma are unable to undergo surgical treatment and have a poor prognosis. A 42-year-old man with hunger-related abdominal pain was diagnosed as having gastric cancer. After the first surgery (distal partial gastrectomy) and the second surgery (gastric stump carcinoma (GSC) resection), the patient suffered repeated multiple intracolonic metastases and underwent three additional resection operations. The patient survived for 154 months after the first operation. In patients with gastric carcinoma that metastasizes to the colonic lumen, radical resection, if possible, can extend survival. Once patients develop extensive extraintestinal metastasis, radical resection cannot be performed, and patients often exhibit a poor prognosis.

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