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Yonson Ku

Publications and source records attributed to Yonson Ku.

At least 19 recordsLinked to original sources

Relative adrenal insufficiency manifested with multiple organ dysfunction in a liver transplant patient.

Relative adrenal insufficiency is now a well-known clinical condition that occurs in critically ill patients particularly with septic complication. However, this pathology has long been unrecognized until recently in liver transplantation patients, for whom postoperative immunosuppressive therapies almost always comprise corticosteroids. We report an obvious case of relative adrenal insufficiency manifested by severe multiple organ dysfunction in a recipient after living donor liver transplantation (LDLT). A 38-year-old woman with multiple hepatocellular carcinoma developed refractory liver failure 2 months after the completion of the dual treatment; namely a cytoreductive right hepatectomy for bulky main tumors followed by 2 courses of percutaneous isolated hepatic perfusion for residual tumors in the remnant liver. She underwent a right-lobe LDLT, and postoperative immunosuppression was initiated with a low-dose tacrolimus monotherapy without corticosteroid because of a severe septic condition before transplantation. Postoperatively, she developed progressive hyperbilirubinemia, renal dysfunction, and coagulopathy. As the corticotropin stimulation test suggested the relative adrenal insufficiency, corticosteroid was commenced 40 days after LDLT. Thereafter, multiple organ dysfunction resolved dramatically and promptly. The patient is presently alive and well with completely normalized liver function 45 months after LDLT.

Adrenal Insufficiency↗

Intrahepatic segmental primary sclerosing cholangitis: report of a case.

A 67-year-old woman was referred to our hospital for investigation of epigastric discomfort. Computed tomography (CT) showed dilatation of the intrahepatic bile duct in the left lobe of the liver, endoscopic cholangiography showed complete stenosis of the left main branch of intrahepatic bile duct, and CT during angiography showed decreased portal blood flow to segment 3 of the liver. Based on these findings, we suspected intrahepatic cholangiocarcinoma and performed left lobectomy of the liver. However, pathological examination revealed fibrosis and infiltration of inflammatory lymphoid cells around the stenotic bile duct and periportal area, without any evidence of malignancy. Since these findings were compatible with sclerosing cholangitis and the patient did not have a disorder that would cause secondary sclerosing cholangitis, the final diagnosis was primary sclerosing cholangitis (PSC). It is difficult to distinguish segmental PSC from cholangiocarcinoma; thus we think surgical resection is an appropriate therapeutic and diagnostic procedure for segmental intrahepatic bile duct stenosis.

Aged↗

ADC measurement of abdominal organs and lesions using parallel imaging technique.

OBJECTIVE: The purpose of our study was to assess the reliability and usefulness of parallel imaging for apparent diffusion coefficient (ADC) measurement of abdominal organs and lesions. MATERIALS AND METHODS: Single-shot spin-echo echo-planar diffusion-weighted MRI (TE = 66, b = 0, 600 s/mm2) was performed in phantom and clinical studies. The b value was set to minimize the effects of perfusion in tissue and to maintain signal-to-noise ratio. Bottle phantoms were scanned with and without parallel imaging and with various parallel imaging factors and at various positions to evaluate the effects of parallel imaging on ADCs. In 200 consecutive clinical patients (122 men and 78 women: mean age, 61.9 years), ADCs were calculated for liver (four segments), spleen, pancreas (head, body, tail), gallbladder, renal parenchyma, and back muscle, and then compared to evaluate the reliability of clinical ADC measurements with parallel imaging. ADCs were also calculated for diffuse diseases and focal lesions (94 malignant and 93 benign) of abdominal organs to evaluate the clinical usefulness of ADC. RESULTS: Location-dependent changes in water ADCs were minimal with parallel imaging factors first of 3, then of 4, and were small except for measurements at the image periphery. Acetone ADCs were saturated at 4.00 x 10(-3) mm2/s. Degraded image quality prevented ADC measurement of the left hepatic lobe and pancreas in 7-18 patients. There was no significant difference among ADCs of four liver segments (1.50 +/- 0.24 [SD] x 10(-3) mm2/s - 1.56 +/- 0.31 x 10(-3) mm2/s) and between ADCs of the right and left kidneys (2.65 +/- 0.30 x 10(-3) mm2/s, 2.59 +/- 0.33 x 10(-3) mm2/s). ADC of the pancreas tail (1.65 +/- 0.37 x 10(-3) mm2/s) was significantly lower than those of the head (1.81 +/- 0.40 x 10(-3) mm2/s) and body (1.81 +/- 0.41 x 10(-3) mm2/s) (p < 0.005). Renal ADCs were significantly lower in patients with renal failure (right: 2.15 +/- 0.30 x 10(-3) mm2/s; left: 2.11 +/- 0.25 x 10(-3) mm2/s) than in those without disease (right: 2.67 +/- 0.29 x 10(-3) mm2/s; left: 2.60 +/- 0.32 x 10(-3) mm2/s) (p < 0.005). ADC of pancreatic cancer was significantly higher than that of healthy pancreas (p < 0.05). ADC of renal angiomyolipoma was significantly lower than those of renal cell carcinoma and healthy renal parenchyma (p < 0.0005). CONCLUSION: Clinical ADC measurements of abdominal organs and lesions using parallel imaging appear to be reliable and useful, and the effect of parallel imaging on calculated values is considered to be minimal.

Adult↗

[Sustained complete remission with reductive surgery plus percutaneous isolated hepatic perfusion (PIHP) for bilobar multiple hepatocellular carcinoma with portal venous tumor thrombus--a case report].

For patients with multiple bilobar hepatocellular carcinoma (m-HCC) and/or advanced portal venous tumor thrombus (Vp3, 4), there has been no effective therapy, and the survival of more than 6 months was exceptional. Under these circumstances, we have developed a dual treatment (dual Tx) that combines reductive hepatectomy with percutaneous isolated hepatic perfusion (PIHP) for such patients. This dual Tx offers the high-rate of mid- and long-term survival in a subset of patients who had previously a dismal prognosis. Herein, we report a patient with Vp4 m-HCC who was successfully treated with dual Tx and survived for more than 2 years with a complete remission of hepatic tumors. A 53-year-old man had main tumors in the right lobe liver and multiple bilobar intrahepatic metastases (IM) with portal venous tumor thrombus reaching the portal trunk. He underwent an extended right hepatectomy with portal venous tumor thrombectomy, and subsequently PIHP twice in a 3-month period after reductive hepatectomy. After dual Tx, he had sustained complete remission for more than 2 years. He died because of obstruction of the superior vena cava by recurrent tumors in the mediastinum. His clinical course after treatment strongly indicates that the dual Tx should become a major treatment option for patients with Vp3, 4 m-HCC.

Carcinoma, Hepatocellular↗

[A case of multiple hepatocellular carcinoma with rapidly progressing bilateral portal vein tumor thrombosis--a complete remission achieved with dual treatment of reductive surgery plus percutaneous isolated hepatic perfusion].

We herein report a case of multiple advanced hepatocellular carcinoma (HCC) with rapidly progressing portal vein tumor thrombosis (PVTT). All of the hepatic tumors have completely disappeared for more than two years by a dual treatment with reductive surgery plus percutaneous isolated hepatic perfusion (PIHP). A 55-year-old man was referred to our institution on June 30, 2003. The abdominal CT scan demonstrated multiple massive HCC in the entire liver with PVTT reaching the portal trunk (Vp4). Two weeks later, the PVTT rapidly progressed to the umbilical portion of the left portal vein, and to the confluence of the superior mesenteric vein and to the splenic vein. Thus, we semi electively performed an extended right hepatectomy together with thrombectomy of the PVTT. Subsequently, he underwent a repeated PIHP (1st; doxorubicin 90 mg/m2, 2nd doxorubicin 65 mg/m2). This treatment produced complete tumor clearance of all of the residual tumors in the left liver. In March 2005, he underwent partial pneumonectomy for a metastatic lung. This again resulted in normalization of serum AFP and PIVKA-II levels. Dual treatment is considered to be the strongest therapeutic modality for multiple advanced HCC with severe PVTT. In addition, a close follow-up is required because in such far advanced cases, metastatic lesions most likely recur in the liver but also in the distant organs.

Carcinoma, Hepatocellular↗

Intraoperative continuous external bile drainage during pancreaticoduodenectomy.

PURPOSE: The common hepatic duct is usually divided during the early stage of pancreaticoduodenectomy. However, abrupt, complete, and prolonged closure of the proximal common duct stump can cause liver damage in the course of this long operation, resulting in postoperative liver dysfunction and associated complications. Here, we investigate this phenomenon further. METHODS: We performed intraoperative continuous external bile drainage (IBD) in 43 consecutive patients (drainage group) and compared postoperative liver enzyme levels, morbidity including liver dysfunction, and outcomes with those of a control group (n = 41). RESULTS: There were no complications associated with IBD catheter insertion in this series. The drainage group had significantly lower transaminase levels within the first 7 postoperative days (PODs) than the control group. Postoperative liver dysfunction was confirmed in six patients from the control group and in one patient from the drainage group (P = 0.04). However, there were no significant differences between these two groups in terms of postoperative morbidity (other than liver dysfunction), relaparotomy, and in-hospital mortality rates. CONCLUSION: Intraoperative continuous external bile drainage failed to improve the overall morbidity and mortality rates in this series. However, our findings showed that prolonged intraoperative complete closure of the common hepatic duct contributed to postoperative liver dysfunction in most patients and that IBD, which is easy and safe to perform, could reduce intra-operative liver damage and prevent postoperative liver dysfunction.

Aged↗

Protection against ischemia/reperfusion injury by the cavitary two-layer method in canine small intestinal transplantation with reduction of reactive oxygen species.

BACKGROUND: Ischemia and reperfusion (I/R) injury is a major determinant of early graft dysfunction and long-term graft survival in small intestinal transplantation. The cavitary two-layer method (TLM) has been reported to be superior to the University of Wisconsin cold storage method (UWM) in long-term preservation of canine small intestine. This study was designed to evaluate the protective effect of the cavitary TLM against I/R injury in canine small intestinal transplantation. METHODS: Intestinal grafts harvested from beagles were allotransplanted after 24-hour preservation by UWM (group 1) or the cavitary TLM (group 2). The graft in the controls (group 3) was immediately allotransplanted without preservation. I/R injury was assessed by functional success rates, biochemical assay, graft adenosine triphosphate (ATP) and lipid peroxidation (LPO) concentrations, and histopathologic examination including TUNEL staining for apoptosis. RESULTS: In group 1, ATP recovery was delayed after reperfusion, and most recipients died with hemorrhage of the grafts and lungs. In group 2, graft ATP concentrations recovered rapidly, and I/R injury was prevented with reduced LPO production, resulting in good outcome. CONCLUSIONS: The cavitary TLM protected intestinal grafts against I/R injury evidenced by maintenance of graft ATP levels and reduction of LPO production compared with UWM in canine small intestinal transplantation.

Adenosine Triphosphate↗

Neoadjuvant high-dose intraarterial infusion chemotherapy under percutaneous pelvic perfusion with extracorporeal chemofiltration in patients with stages IIIa-IVa cervical cancer.

OBJECTIVE: The objective of this study was to evaluate the response rate and survival of patients with locally advanced uterine cervical cancer who were treated with intraarterial infusion chemotherapy under percutaneous pelvic perfusion with extracorporeal chemofiltration (PPPEC). METHODS: Twenty-three untreated patients with stages IIIa-IVa cervical cancer were enrolled in the study. PPPEC was administered twice at 2 weeks interval using high-dose cisplatin alone (140-250 mg/m(2)) or high-dose cisplatin plus mitomycin C (7 mg/m(2)), pepleomycin (7 mg/m(2)) and 5-fluorouracil (700 mg/m(2)). Eighteen patients in whom the tumor downstaging was confirmed underwent radical surgery following PPPEC, whereas in the remaining five patients, radiotherapy was administered. RESULTS: Two weeks after the second PPPEC, the median volumetric tumor reduction and tumor response were 76% and 87%, respectively. Histologic response was 96%, while the tumor downstaging reached 83%. The curative surgery rate achieved was 89%. Five-year progression-free survival was 47% and 5-year survival rate was 74%. CONCLUSION: High-dose intraarterial infusion chemotherapy under PPPEC effectively achieved tumor downstaging and resulted in the favorable performance of the subsequent radical surgery and improved the 5-year survival rate of patients with locally advanced uterine cervical cancer.

Adult↗

Reductive surgery plus percutaneous isolated hepatic perfusion for multiple advanced hepatocellular carcinoma.

OBJECTIVE: To evaluate the efficacy of a novel 2-stage treatment with reductive surgery plus percutaneous isolated hepatic perfusion (PIHP) for multiple hepatocellular carcinoma (HCC), which was previously unresectable. SUMMARY BACKGROUND DATA: Surgical resection is the treatment of choice for HCC, but the majority of patients with advanced HCC are not suitable candidates. PIHP is a minimally invasive surgery that allows high-dose regional chemotherapy of the liver, and our phase II studies have shown its profound efficacy for the local control of advanced HCC. METHODS: Twenty-five patients with multiple advanced HCC were enrolled in this prospective study. In the first stage, all patients underwent reductive hepatectomy: major hepatectomy in 13 patients and segmentectomy or less in 12. In 2 patients with subsegmentectomy, the retropancreatic and periportal metastatic lymph nodes were synchronously resected. Regardless of the type of hepatectomy, all patients routinely underwent cholecystectomy, and ligations of the right gastric artery and arterial collaterals of the remnant liver to increase the safety and efficacy of PIHP. In the second stage, PIHP with doxorubicin 60-120 mg/m2/treatment was planned for a period of 1 to 3 months after surgery. RESULTS: Of 25 enrolled patients, 22 successfully underwent PIHP an average of 1.8 times for the local control of residual liver tumors. In the remaining 3 patients, PIHP was abandoned because 2 had rapid disease progression and 1 had liver failure after surgery. In 22 patients with the 2-stage treatment, 19 (86%) had objective local tumor control (10 complete remissions and 9 partial responses with a median response duration of 16 months). The actuarial survival rate of all 25 patients was 42% at 5 years. CONCLUSIONS: Reductive surgery plus PIHP produced a strong antitumoral effect on multiple advanced HCC, when liver function allows this concentrated treatment approach, and offers long-term survival in a subset of patients who were previously deemed to have unresectable disease.

Adult↗

Successful 24-hour preservation of ischemically damaged canine small intestine by the cavitary two-layer method.

BACKGROUND: The purpose of this study is to examine the possibility of a long-term preservation of the ischemically damaged intestine by the cavitary two-layer method (TLM) in canine small intestinal transplantation. METHODS: The grafts were allotransplanted without preservation immediately (group 1) or after 30 minutes of warm ischemia (group 2). The ischemically damaged grafts were also allotransplanted after cold preservation for 24 hours in University of Wisconsin (UW) solution (group 3) or the cavitary TLM (group 4). Seven-day survivals, tissue adenosine triphosphate (ATP) concentrations, absorption tests, and histopathology were examined. RESULTS: seven-day survivals in groups 1, 2, 3, and 4 were 8 of 8, 6 of 8, 0 of 8, and 6 of 8, respectively. In group 4, significant recovery of ATP tissue level was seen after preservation compared with group 3, and absorption function and regeneration of the graft mucosa recovered at day 14. CONCLUSIONS: Ischemically damaged canine small intestine could be preserved for 24 hours by the cavitary TLM.

Adenosine↗

Significant role of middle hepatic vein in remnant liver regeneration of right-lobe living donors.

For adult patients with end-stage liver disease, living-donor liver transplantation (LDLT) of right-lobe grafts with or without the middle hepatic vein (MHV) has been increasingly used in recent years. We investigated the role of the MHV in donor remnant liver regeneration after right-lobe LDLT, which has not been described in previous studies. A total of eight living donors were included in this study of right-lobe LDLT. Four donors underwent right lobectomy (without MHV), and the remaining four underwent extended right lobectomy (with MHV). Regeneration of the donor remnant liver was assessed by volumetric computed tomography studies before and 90 days after LDLT. Comparison between the right-lobe and extended right-lobe donors did not show a clear-cut difference in the net increase of remnant liver volume at 3 months. However, the mean volume increase of the medial segment at the 90th postoperative day was 7% in the extended right-lobe donors and 61% in the right-lobe donors, showing a lower value in the remnant livers without MHV. The MHV plays a specific role in remnant liver regeneration of right-lobe living donors. We expect that this knowledge will contribute to securing a margin of safety in right-lobe LDLT.

Adult↗

Isolated gastric varices resulting from iatrogenic splenic vein occlusion: report of a case.

Iatrogenic splenic vein occlusion is known to be a rare cause of left-sided portal hypertension. We herein describe the clinical course of a 43-year-old woman with isolated gastric varices, which proved to be attributable to a segmental splenic vein resection during an operation for a benign pancreatic tumor 11 years previously. Seven years after the initial operation, prominent gastric varices due to left-sided portal hypertension were first noted. During the follow-up period of 4 years, she had no episodes of gastrointestinal hemorrhaging. Although the size of the gastric varices did not change, she decided to have a splenectomy considering the potential risk of variceal hemorrhaging. It may be reasonable to perform a splenectomy concomitantly when the splenic vein is to be resected or ligated during pancreatic surgery to avoid the future development of left-sided portal hypertension. However, the role of prophylactic surgery in asymptomatic patients with iatrogenic splenic vein occlusion remains to be determined.

Esophageal and Gastric Varices↗

Identification of hepatitis C virus (HCV) subtype 1b strains that are highly, or only weakly, associated with hepatocellular carcinoma on the basis of the secondary structure of an amino-terminal portion of the HCV NS3 protein.

The NS3 protein of hepatitis C virus subtype 1b (HCV-1b) isolates obtained from 89 patients with hepatocellular carcinoma (HCC) and 78 patients without HCC were analyzed. On the basis of the secondary structure of the amino-terminal 120 residues of NS3, HCV-1b isolates were classified into group A, group B, and an indeterminate group, each of which was further divided into a number of subgroups, such as A1-1, A1-2, A2-1, A2-2, B1-1, B1-2, B2-1, B2-2, C-1, C-2, and C-3. HCV-1b isolates of subgroup B1-1 were found in 53 (59.6%) of 89 patients with HCC and 19 (24.4%) of 78 patients without HCC, with the difference between the two patient groups being statistically significant (P < 0.00001). Although the number of isolates was small, subgroup B2-1 was also highly associated with HCC, with all five isolates in that subgroup being found in patients with HCC (P < 0.05). On the other hand, HCV-1b isolates of subgroup A1-1 were associated only weakly with HCC; they were found in 6 (6.7%) of 89 patients with HCC and in 25 (32.1%) of 78 patients without HCC, with the difference between the two patient groups being statistically significant (P < 0.0001). The other subgroups, such as A1-2, A2-1, B1-2, C-1, C-2, and C-3, were moderately associated with HCC; their distribution patterns among patients with HCC did not differ significantly from those among patients without HCC. Taken together, our results suggest that HCV-1b isolates of subgroups B1-1 and B2-1 are highly associated with HCC and that this secondary structure analysis may be useful for predicting the relative risk of developing HCC.

Amino Acid Sequence↗

An experimental study on the pharmacokinetics of 5-fluorouracil regional chemotherapy for pancreatic cancer.

BACKGROUND: Recently a few centers reported promising results of regional intra-arterial chemotherapy for pancreatic cancer. However, the detailed pharmacokinetics and the side effects of anticancer agents remain unclear. METHODS: Catheters were introduced into the gastroduodenal artery and the splenic artery of dogs. In group I, arterial infusion of 5-fluorouracil (5-FU) was performed over 10 minutes. In group II, 5-FU was infused systemically. In group III, an intra-arterial infusion was repeated weekly three times. Blood samples and liver and pancreas tissue samples were obtained to determine 5-FU levels. In a subset of each group, the pancreas, duodenum, and liver were excised for histological analyses. RESULTS: Immediately after the infusion of 5-FU, the portal level in group I was higher than that in group II. However, the mean systemic level in group I was lower than in group II. The mean tissue concentration in the pancreas in group I was significantly higher than that of group II. Histological examination revealed no microscopic alterations after treatment in all groups, including group III. CONCLUSIONS: This fundamental study suggested that intra-arterial chemotherapy of 5-FU for pancreatic cancer allows higher regional drug delivery without adverse effects on normal regions of the pancreas, the duodenum, and the liver.

Animals↗

[Harvesting of autologous peripheral blood stem cells following percutaneous isolated hepatic perfusion for patients with advanced hepatocellular carcinoma].

Percutaneous isolated hepatic perfusion (PIHP) using high-dose chemotherapeutic agents is highly effective for advanced hepatocellular carcinoma in comparison with conventional regional and systemic chemotherapies. However, bone marrow toxicities resulting from the first PIHP preclude additional second/third PIHP in some cases. In an attempt to increase safety of repeated PIHP, autologous peripheral blood stem cells (PBSC) were harvested after the first PIHP in nine patients with multiple hepatocellular carcinoma with administration of G-CSF. PBSCs were successfully harvested in only three patients with relatively well-preserved liver function, whereas PBSC harvests were unsatisfactory in the remaining six patients with highly impaired liver function. The possible reasons for this phenomenon may include hypofunction of bone marrow in cirrhotic patients, and an insufficient use of G-CSF in the present study. Alfa-fetoprotein-mRNA, determined by nested RT-PCR, was detected in six PBSCs, indicating frequent contamination of tumor cells. More precise studies are needed before clinical application of autologous stem cell infusion for patients with malignant hepatic tumors and impaired liver function.

Adult↗

Ultrastructural analyses of pancreatic grafts preserved by the two-layer cold-storage method and by simple cold storage in University of Wisconsin solution.

The two-layer cold storage method (TLM) using University of Wisconsin (UW) solution supplies sufficient oxygen to pancreatic grafts during preservation and extends pancreas preservation time to up to 96 h in the canine model. Simple cold storage in UW (UWM) on the other hand, preserves canine pancreas grafts for up to 72 h by preventing cell swelling, mainly because of its high osmotic pressure. The aim of this study is to analyze morphologically dog pancreatic grafts preserved by these two methods with their different mechanisms. Immediately after preservation of canine pancreata by TLM for 72 h and 96 h (group 1 and group 3, respectively), and by UWM for 72 h and 96 h (group 2 and group 4, respectively), tissue ATP levels were determined using high-performance liquid chromatography (HPLC), and detailed morphological analyses of intragraft components were performed using light- and electron microscopy. The mean areas of one mitochondrion and rough endoplasmic reticulum (RER) vacuolization were calculated by computer-graphic analyses using NIH image 1.62 f soft. The tissue ATP levels were significantly higher in groups 1 and 3 than groups 2 and 4 ( P < 0.05). Light microscopy demonstrated no marked difference among the 4 groups. By electron microscopy however, mitochondrial swelling and RER vacuolization were observed in acinar cells to various extents in the 4 groups. They were significantly more evident in group 2 than group 1 ( P < 0.05), and in group 4 than group 3 ( P < 0.05). In conclusion, TLM demonstrated excellent protection of intracellular organelles, mitochondria, and RER, up to 72-96 h. Well-maintained graft ATP levels in TLM groups may result in maintaining the integrity of intracellular organelle membranes as well as cellular membranes.

Adenosine↗

Three-dimensional reconstruction of biliary tract using spiral computed tomography for laparoscopic cholecystectomy.

To increase the safety of laparoscopic cholecystectomy, we have analyzed the biliary tract in a three-dimensional fashion. The union of the biliary ducts was studied in 50 patients using spiral computed tomography (CT) after intravenous infusion cholangiography. Depending on the union and course of the cystic duct to the common bile duct, cystic duct anatomy was classified into six categories: ipsilateral gallbladder side (type I) and contralateral side with anterior course (type II); contralateral side with posterior course (type III); intrahepatic side (type IV); intrapancreatic side (type V); and unclassified (type VI). The length of the cystic duct was also determined. The cystic duct was identified in 42 cases (84%); 30 cases (60%) were type I, 9 cases (18%) type III, and a single case (2%) of types II, IV and V, respectively. The length of the cystic duct was < or =2 cm in 30 cases that had a shorter operating time compared to 12 cases with a cystic duct <2 cm (p <0.01). In conclusion, three-dimensional reconstruction of the cystic duct anatomy using spiral CT provides simple classification of bile duct anatomy, and this preoperative information may increase the safety of laparoscopic cholecystectomy.

Adult↗

Inhibitory effect of epigallocatechin-3-gallate on growth and invasion in human biliary tract carcinoma cells.

Based on recent evidence that tea consumption contributes to a decreased incidence of human carcinomas, a number of investigators have focused on the mechanisms of cancer prevention by tea extracts, especially green tea polyphenols. Epigallocatechin-3-gallate (EGCG) is a representative polyphenol that inhibits the activity of the cyclin-dependent kinases of cdk2 and cdk4. This suggests that EGCG may exert its growth-inhibitory effects through modulation of G1 regulatory proteins such as cdk2 and cdk4. The human biliary tract carcinoma cells (TGBC-2, SK-ChA-1, and NOZC-1) were treated with different doses of EGCG (0, 25, 50, 100, and 200 mM) for 48 hours in cell medium. Cell proliferation was analyzed by WST-1 colorimetric assay. For the cell-invasion analysis, the cells were incubated with 100 mM of EGCG for 2 hours. The cells were then added into a Matrigel-coated Cell Insert. After incubation at 37 degrees C for 24 hours, the cells visible through the Matrigel were counted under the microscope. All human biliary tract cancer cells studied showed a significant suppression of cell growth by EGCG treatment in a dose-dependent manner (27.2%, 16.0%, and 10.1%, in TGBC-2, SK-ChA-1, and NOZC-1, respectively, at the dose of 200 mM). Epigallocatechin-3-gallate treatment also produced a significant suppression of invasive ability of the carcinoma cells (12.6%, 11.2%, 7.9%, in TGBC-2, SK-ChA-1, and NOZC-1, respectively, at a dose of 100 mM). These data indicated that EGCG might be a potent biological inhibitor of human biliary tract cancers, reducing their proliferative and invasive activities.

Antineoplastic Agents, Phytogenic↗