Oxaliplatin/5-FU without Leucovorin Chemotherapy in Metastatic Colorectal Cancer / Journal of the Korean Cancer Association, 대한암학회지

PURPOSE: Fluorouracil (5-FU) and leucovorin combination therapy have shown synergistic or additive effect against advanced colorectal cancer, but the frequency of mucositis and diarrhea is increased. Most previous studies have used high dose leucovorin (300~500 mg/m2). However, some studies of oxaliplatin and 5-FU with low-dose or high-dose leucovorin in Korea have shown similar response rates. Therefore, we studied the necessity of leucovorin and evaluated the objective tumor response rates and toxicities of a regimen of oxaliplatin and 5-FU without leucovorin every 2 weeks in metastatic colorectal cancer patients. MATERIALS AND METHODS: Twenty-four patients with metastatic colorectal cancer were enrolled between January 2002 and March 2003. Patients received 85 mg/ m2 of oxaliplatin on day 1, a bolus 5-FU 400 mg/m2 on day 1 and a continuous 5-FU infusion at 600 mg/m2/ 22 hours days 1 and 2, every 2 weeks. RESULTS: Of the 24 patients treated, 17 patients received previous 5FU with leucovorin and/or other chemotherapy. Three patients could not be evaluated. Five partial responses were observed with overall response rate of 21% (n=24). Of the previous chemotherapy group (n= 17), 4 partial responses were observed with response rate of 24%. Median overall survival was 18 months (range 4~32 months) and median progression free survival was 4 months (range 2~6 months). This regimen was well tolerated and only 1 grade 3 anemia was observed. CONCLUSION: Oxaliplatin/5-FU combination therapy without leucovorin achieved a relatively high response rate even in patients resistant to the previous 5-FU chemotherapy, and toxicity was minimal.

Expression of Caspase-3 and c-myc in Non-Small Cell Lung Cancer / Journal of the Korean Cancer Association, 대한암학회지

PURPOSE: Caspase-3 is a cysteine protease that plays an important role in the process of apoptotic cell death, but little has been studied clinically on caspase-3 in lung cancer. Increased c-myc expression can result in mitosis or apoptosis, and its contribution to the pathogenesis and prognosis of lung cancer has gained interest. In the present study, the expressions of caspase-3 and c-myc, along with their possible correlations with prognostic variables, were analyzed in resected non-small cell lung carcinomas (NSCLC). MATERIALS AND METHODS: Archival tumor tissues from 147 previously untreated NSCLC patients were examined by immunohistochemistry for the expressions of caspase-3 and c-myc proteins. Clinical information was obtained through the computerized retrospective database from the tumor registry. RESULTS: The expressions of caspase-3 and c-myc were detected in 60 (88/147) and 16% (24/147) of tumors, respectively. No association was found between caspase-3 and c-myc expressions. A multivariate analysis demonstrated the N status and pathologic stage to be significantly correlated with poor survival (p-value=.018 and .002, respectively), but positive expression of caspase-3 was associated with a good prognosis (p=.03). CONCLUSION: Our data suggest the involvement of caspase-3 in the tumorigenesis of NSCLC. It is also noteworthy that caspase-3 expression might be a favorable prognostic indicator in these tumors.

Expression of c-kit and p53 in Non-small Cell Lung Cancers / Journal of the Korean Cancer Association, 대한암학회지

PURPOSE: Increasing experimental evidence indicates that abnormal expression of c-kit may be implicated in the pathogenesis of a variety of solid tumors. It has been reported that over 70% of small cell lung cancer (SCLC) contain the c-kit receptor. In the present study, a c-kit analysis has been extended to non-small cell lung cancer (NSCLC). The expressions of p53, vascular endothelial growth factor (VEGF) and cd34, in addition to c-kit, were evaluated to investigate the correlations between these proteins and to determine their potential relationships with the clinicopathological data. MATERIALS AND METHODS: Paraffin-embedded tumor sections, obtained from 147 patients with NSCLC, were immunohistochemically investigated using anti-c-kit, anti- p53, anti-VEGF and anti-cd34 antibodies. RESULTS: c-kit was expressed in 40 (27%) of the tumors examined: 27% of the adenocarcinomas, 27% of the squamous cell carcinomas and 29% of the undifferentiated carcinomas. p53 and VEG F immunoreactivities were present in 107 (73%) and 110 (75%) carcinomas, respectively. Anti-cd34 was negative in all samples. No associations were established among these proteins. The c-kit, however, showed a strong correlation with the T factor: T1 (n=11), 0%; T2 (n=49), 16% and T3 (n=87), 37% (p=.006). CONCLUSION: It is suggested that in NSCLC c-kit is expressed relatively frequently and may become a therapeutic target for the patients with inoperable or recurrent c-kit positive tumors. The alterations in p53 probably constitute an early event, whereas the activated c-kit may contribute to tumor progression.

Effect of Vinorelbine, Ifosfamide and Cisplatin Combination Chemotherapy in Stage III-IV Non-Small-Cell Lung Cancer / Journal of the Korean Cancer Association, 대한암학회지

PURPOSE: To evaluate the response rates, toxicitiesy, and survival rates, to vinorelbine (Navelbine(R)), cisplatin and ifosfamide combination chemotherapy, of the patients with inoperable NSCLC (stage III and IV), who received vinorelbine (Navelbine(R)), cisplatin, ifosfamide combinationthe mentioned chemotherapy every 4 weeks. MATERIALS AND METHODS: This study included 26 patients with inoperable NSCLC (stage III and IV), who attended St. Vincent's Hospital Bbetween April 1999 and December 2001, 26 patients were included at St.Vincent's Hospital. The chemotherapy regimen consisted of vinorelbine (25 mg/m2 on days 1 and 8), ifosfamide (1,500 mg/m2 on days 1- and 2 with mesna), and cisplatin (30 mg/m2 on days 1- to 3). The cycles were administered every 4 weeks. A 25% reduction in the doses reduction was applied into subsequent courses if there werewas grade 3~4 neutropenia. RESULTS: The median age was 63 (range, 44~73) years and the male : to female ratio was 19 : 7. One patient had stage IIIa, 6 had stage IIIb and 19 had stage IV. Twenty two patients had an ECOG performance status of 0 or 1, andwith 4 hadhave one of 2. Eighteen of the patients had adenocarcinoma, 7 had squamous cell carcinomas, and 1 had an undifferentiated NSCLC. Two patients were innot able to be evaluatedble due to follow-up loss. Among Of the 24 patients able to be evaluatedble patients, 1 patient had a complete response and 9 patients hada partial responses, and thewith an overall response rate wasof 41.7%. During a total of 104 cycles, grade 3 neutropenia occurred in 29%, grade 4 neutropenia in 12%, grade 3~4 thrombocytopenia in 4%, grade 3 anemia in 11%, and grade 3~4 mucositis in 2%. The mean time to progression was 6.4 months (range 1~13) and the median overall survival was 10 months (range 1.5~32). CONCLUSION: The combination of vinorelbine, ifosfamide and cisplatin, in the dose and schedule employed in this study, shows an response rate of 41.7%, but, because grade 3- or 4 neutropenia occurred in 41%, a careful investigation is needed.