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Diacylglycerol Kinase Alpha is a Proliferation Marker of Intrahepatic Cholangiocarcinoma Associated with the Prognosis

Overview
Journal Cancer Med
Specialty Oncology
Date 2024 May 8
PMID 38716625
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Abstract

Background: Intrahepatic cholangiocarcinoma (ICC) has a high recurrence rate and a poor prognosis. Thus, the development of effective treatment and prognostic biomarkers is required. High expression of diacylglycerol kinase alpha (DGKα) is a prognostic factor for the recurrence of hepatocellular carcinoma. However, the relationship between DGKα expression and prognosis in ICC has not been reported.

Methods: Immunohistochemistry (IHC) with anti-DGKα antibody was performed on surgical specimens of ICC (n = 69). First, DGKα expression in cancer cells was qualitatively classified into four groups (-, 1+, 2+, 3+) and divided into two groups (DGKα- and DGKα+1 + to 3+). The relationship between clinical features and DGKα expression was analyzed. Second, Ki-67 expression was evaluated as a cell proliferation marker. The number of Ki-67-positive cells was counted, and the relationship with DGKα expression was examined.

Results: DGKα IHC divided the patients into a DGKα+ group (1+: n = 15; 2+: n = 5; 3+: n = 5) and a DGKα- group (-: n = 44). In the DGKα+ group, patients were older and had advanced disease. Both overall survival and recurrence-free survival (RFS) were significantly worse in the DGKα+ patients. DGKα+ was identified as an independent prognostic factor for RFS by multivariate analysis. Furthermore, the number of Ki-67-positive cells increased in association with the staining levels of DGKα.

Conclusion: Pathological DGKα expression in ICC was a cancer proliferation marker associated with recurrence. This suggests that DGKα may be a potential therapeutic target for ICC.

Citing Articles

Overexpression of proteasome 26S subunit non-ATPase 6 protein and its clinicopathological significance in intrahepatic cholangiocarcinoma.

Tang Z, Tang Y, Qin K, Li Q, Chen G, Huang Y World J Hepatol. 2024; 16(11):1282-1289.

PMID: 39606161 PMC: 11586755. DOI: 10.4254/wjh.v16.i11.1282.


Diacylglycerol kinase alpha is a proliferation marker of intrahepatic cholangiocarcinoma associated with the prognosis.

Shichi S, Sugiyama K, Asahi Y, Shirakawa C, Nakamoto H, Kimura S Cancer Med. 2024; 13(9):e7238.

PMID: 38716625 PMC: 11077429. DOI: 10.1002/cam4.7238.

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