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CD44 expression in patients with combined hepatocellular cholangiocarcinoma
Ryounggo Kim,Sang Bum Kim,Eung-Ho Cho,Sun Hoo Park,Sung Bae Park,Seong Kweon Hong,Gibong Chae 대한외과학회 2015 Annals of Surgical Treatment and Research(ASRT) Vol.89 No.1
Purpose: Combined hepatocellular cholangiocarcinoma (ChC) is a rare type of primary liver cancer, which is thought to have a poorer prognosis than hepatocellular carcinoma (HCC). Cancer stem cells are associated with tumorigenesis, tumor progression, recurrence, metastasis, and poor prognosis in several malignancies including HCC. The aim of this study was to investigate the expression pattern of cancer stem cell markers in ChC and HCC, and to evaluate whether this pattern correlated to patient prognosis. Methods: Thirteen patients who underwent curative hepatic resection for ChC and 13 patients who underwent curative hepatic resection for HCC (matched control cases) were included. Immunohistochemical staining for cancer stem cell markers (cytokeratin [CK]7, CK19, C-kit, cluster of differentiation [CD] 44, CD133, and epithelial cell adhesion molecule) was performed and clinical outcomes were analyzed retrospectively. Results: There was no significant difference in cancer stem cell marker expression between ChC and HCC. In ChC, the group that expressed CD44 showed earlier recurrence than the group that did not express CD44 (P = 0.040). Conclusion: The expression of cancer stem cell markers in ChC did not show a different pattern compared to that found in HCC. The expression of cancer stem cell marker CD44 was associated with poor prognosis in patients with ChC.
Seok Joon Lee,Eung-Ho Cho,Ryounggo Kim,Young Han Kim,Chang-Sup Lim,Sang Bum Kim 한국간담췌외과학회 2015 한국간담췌외과학회지 Vol.19 No.3
Backgrounds/Aims: We compared the efficacy and safety of a hepatectomy, combined with intraoperative radiofrequency ablation to those of wider extent hepatectomy, alone, in patients with multiple hepatocellular carcinomas (HCCs). Methods: Between January 2004 and December 2013, 78 patients with multiple HCCs underwent surgery. 25 patients were treated by hepatectomy, combined with intraoperative radiofrequency ablation (RFA) (group A), and 53 underwent hepatectomy only (group B). We retrospectively analyzed medical records to compare the clinical features of these two groups. Results: Patients in group A had more limited resections (less than 2 segments) than those in group B (p<0.001). Patients in group A also tended to have fewer red blood cell transfusions than those in group B (p=0.060). Liver function- and surgery-related complications occurred only in group B. There were no in-hospital mortalities in both groups. The overall survival and disease-free survival outcomes were not significantly different between groups A and B (p=0.177 and p=0.305, respectively). Conclusions: Hepatectomy combined with intraoperative RFA could be a safe and effective treatment option for patients with multiple HCCs, comparable to extended hepatectomy alone.
Juhyeon Lee,Eung-Ho Cho,Sang Bum Kim,Ryounggo Kim 한국간담췌외과학회 2020 Annals of hepato-biliary-pancreatic surgery Vol.24 No.4
Backgrounds/Aims: Intrahepatic recurrence is frequent result after hepatectomy for hepatocellular carcinoma (HCC). We analyzed the clinical results of patients who had the intrahepatic recurrences of HCC after curative surgical resections. Methods: From January 2009 to December 2016, 320 patients underwent curative surgical resection for HCC in department of Surgery, Korea Cancer Center Hospital. After surgical resection, 155 patients had suffered HCC recurrence during follow-up period. Among them, 122 patients had only intrahepatic recurrence initially, who were included in this retrospective study. We analyzed about the period of the recurrence after surgery, treatment methods for the recurred tumors, and poor prognostic factors for survival after intrahepatic recurrences. Results: Among the 122 patients, 83 patients had recurrence within 24 months after surgery. Thirty-eight patients underwent curative treatment for the recurred tumors (re-resection in 18, radiofrequency ablation in 20 patients). Non-curative treatments were performed in 77 patients (TACE in 68 patients, radiotherapy in 9 patients) and conservative management in 7 patients. Five-year survival rate of patients who underwent curative treatment is 86.4% (p≤0.001). Five-year survival rate of non-curative treatment is 55.7% (p≤0.001), conservative management is 0% (p=0.021). Among the clinical factors, non-curative treatment for recurred tumor, AFP level at the time of recurrence, size of recurred tumor were independent poor prognostic factors for survival after intrahepatic recurrences (p<0.001). Conclusions: For the patients who had intrahepatic recurrent HCC after surgery, aggressive local treatment can improve the prognosis in selective cases. Further study is necessary to validate this retrospective investigation.
Promoter methylation of cysteine dioxygenase type 1
Jung-il Choi,Eung-Ho Cho,Sang Bum Kim,Ryounggo Kim,Junhye Kwon,Misun Park,Hye-Jin Shin,Han Suk Ryu,Sun-Hoo Park,Kee-Ho Lee 한국간담췌외과학회 2017 Annals of hepato-biliary-pancreatic surgery Vol.21 No.4
Backgrounds/Aims: Cysteine dioxygenase type 1 (CDO1) acts as a tumor suppressor and is silenced by promoter methylation in various malignancies. The relationship between the CDO1 methylation status and hepatocellular carcinoma (HCC) tumorigenesis was evaluated. Methods: Using a HCC cell line (SNU423), an in vitro demethylation study was performed to confirm whether promoter methylation causes CDO1 down-regulation. The SNU423 cells transfected with the CDO1 cell function was compared to that of naïve cells. An in vivo study using immunohistochemical staining of HCC specimens that were collected from patients who underwent curative liver resection was also performed. Results: CDO1 was activated after demethylation treatment in the HCC specimens. Moreover, tumor cell proliferation, colony-forming, migration, and invasion activities significantly decreased after CDO1 transfection (p<0.05). The percentage of tumors that were larger than 5 cm was higher in patients who had a lower expression of CDO1 (p=0.030). Vascular invasion and histological grade were independent prognostic factors for poor overall and recurrence-free survival. The degree of CDO1 expression was not an independent prognostic factor in this study’s population. Conclusions: These results suggested that methylation down-regulated CDO1 expression in the HCC cells. CDO1 methylation may be a potentially valuable diagnostic biomarker for HCC.