eISSN: 2084-9869
ISSN: 1233-9687
Polish Journal of Pathology
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1/2022
vol. 73
 
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abstract:
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LncRNA FGD5-AS1 drives the malignant development of gastric cancer by negatively interacting with FZD3

Limin Feng
1
,
Hui Zheng
1
,
Huaping Zhang
1
,
Mingxiao Cao
1
,
Hua Zhou
1

  1. Department of Gastrointestinal Surgery, Yantai Yuhuangding Affiliated Hospital of Qingdao University, Yantai, China
Pol J Pathol 2022; 74 (1): 72-79
DOI: https://doi.org/10.5114/pjp.2022.117179
Online publish date: 2022/06/29
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We aimed to detect the expression pattern of long non-coding RNA (lncRNA) FGD5-AS1 in gastric cancer (GC) samples and its impact on driving the development of GC. FGD5-AS1 levels in 66 cases of GC tissues and paracancerous ones were detected. Its influences on clinical features and prognosis in GC patients were analyzed. In AGS and SGC-7901 cells with FGD5-AS1 knockdown, phenotype changes were assessed through cell counting kit-8 (CCK-8), Transwell and wound healing assay. The downstream target of FGD5-AS1 was searched by a bioinformatics tool and confirmed by dual-luciferase reporter assay. Their interaction in regulating the malignant development of GC was finally explored. FGD5-AS1 was upregulated in GC tissues compared to paracancerous ones. GC patients expressing a high level of FGD5-AS1 had higher risk of lymphatic metastasis or distant metastasis and worse prognosis than those with a low level. Knockdown of FGD5-AS1 weakened proliferative and metastatic abilities in AGS and SGC-7901 cells. FZD3 was the downstream target of FGD5-AS1. Protein levels of FZD3 and FZD5 were upregulated, while b-catenin, TGF-b and MMP9 were downregulated in GC cells with FGD5-AS1 knockdown. Knockdown of FZD3 abolished the regulatory effects of FGD5-AS1 on malignant phenotypes of GC cells. FGD5-AS1 is upregulated in GC samples, which is linked to metastasis and prognosis in GC. It drives proliferative and metastatic abilities in GC cells via negatively interacting with FZD3.
keywords:

FGD5-AS1, FZD3, gastric cancer (GC), malignant development
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