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M. Nakata
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P1.02 - Poster Session/ Treatment of Localized Disease – NSCLC (ID 209)
- Event: WCLC 2015
- Type: Poster
- Track: Treatment of Localized Disease - NSCLC
- Presentations: 1
- Moderators:
- Coordinates: 9/07/2015, 09:30 - 17:00, Exhibit Hall (Hall B+C)
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P1.02-032 - Randomized Feasibility Study of S-1 for Adjuvant Chemotherapy in Completely-Resected Stage IA Non-Small-Cell Lung Cancer (SLCG 0701) (ID 754)
09:30 - 17:00 | Author(s): M. Nakata
- Abstract
Background:
The aim of this multicenter study (the Setouchi Lung Cancer Group Study 0701) was to determine the feasible administration schedule of S-1, an oral fluoropyrimidine, for adjuvant chemotherapy in patients with completely-resected pathological stage IA (tumor diameter, 2 to 3 cm) non-small-cell lung cancer (NSCLC).
Methods:
Patients were randomly assigned to receive an adjuvant chemotherapy of either 4-week oral administration of S-1 (80 mg/m2/day) followed by 2-week rest (group A), or 2-week oral administration of S-1 (80 mg/m2/day) followed by one week rest (Group B). The duration of adjuvant chemotherapy was one year in both arms. The primary endpoint was feasibility.
Results:
Figure 1 Eighty patients were enrolled, of whom 76 were received S-1 treatment. The treatment completion rates were 49.4% [95% confidential interval (CI), 32.8 to 65.9%] in group A and 52.1 % (95%CI, 35.5 to 68.6%) in group B (P = 0.4). The relative dose intensities were 40.4% (95%CI, 20.3 to 60.5%) in group A and 53.5% (95%CI, 37.7 to 69.3%) in group B (P = 0.4). There were no treatment-related deaths. Patients with grade 3/4 toxicities were significantly more frequent in group A (40.5%) than group B (15.4%, P = 0.02). The 2-year relapse-free survival rates were 97.5% in group A and 92.5% in group B, and the 2-year overall survival rates were 100% in both groups.
Conclusion:
Two-week oral administration of S-1 followed by one week rest for one year may be more feasible for adjuvant chemotherapy in patients with completely-resected stage IA (T diameter, 2 to 3 cm) NSCLC.
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P1.04 - Poster Session/ Biology, Pathology, and Molecular Testing (ID 233)
- Event: WCLC 2015
- Type: Poster
- Track: Biology, Pathology, and Molecular Testing
- Presentations: 1
- Moderators:
- Coordinates: 9/07/2015, 09:30 - 17:00, Exhibit Hall (Hall B+C)
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P1.04-050 - COX-2 Genetic Variants Influence Intratumoral Infiltration of Foxp-3-Positive Regulatory T Cells in Non-Small Cell Lung Cancer (ID 1321)
09:30 - 17:00 | Author(s): M. Nakata
- Abstract
Background:
The immune microenvironment of primary tumors has been reported to be a prognostic factor. We previously reported that the tumor-infiltrating regulatory T sell (Treg) count was positively correlted with the intratumoral cyclooxygenase-2 (COX-2) expession level and was associated with a poor survival among patients with non-small cell lung cancer (NSCLC). Recently, numerous single nucleotide polymorphisms (SNPs) in the COX-2 gene have been identified, and those SNPs may contribute to differential gene expression and enzyme activity levels. However, whether COX-2 genetic variants influence the functions of COX-2 in NSCLC remains unclear.
Methods:
Eighty NSCLC patients who underwent a complete recection at our institute ware enrolled. We extracted DNA from the peripheral blood and identified five different COX-2 SNPs. The correlations between the COX-2 SNPs and the expression levels of COX-2, Tregs and Ki-67 were studied. The prognostic significance of the COX-2 SNPs was also evaluated.
Results:
COX-2 SNPs were not correlated with the expression of COX-2. However, for the COX-2 -1195G/A polymorphism, the AA genotype group had a significantly higher Treg score. Furthermore, the AA group had a significantly higher Treg score regardless of the COX-2 expression level. The COX-2 -1195AA genotype group tended to have a shorter disease-free survival period than the GA/GG group.
Conclusion:
In conclusion, the COX-2 -1195G/A polymorphism influences the infiltration of Tregs into NSCLC, and the COX-2 SNP factor may be a prognostic factor reflecting Treg infiltration in NSCLC.
