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MA08 - Treatment Monitoring in Advanced NSCLC (ID 386)
- Event: WCLC 2016
- Type: Mini Oral Session
- Track: Advanced NSCLC
- Presentations: 1
MA08.07 - Prospective Sequential Counts of Total CTC or cKIT+CTC in Advanced NSCLC with 1st Line Chemotherapy (POLICE) (ID 5857)
11:00 - 12:30 | Author(s): H. Yan
Circulating tumor cells (CTCs) have been reported prognostic and predictive in non-small cell lung cancer (NSCLC) and a few of other cancer types. In 1[st] line setting, whether EPCAM[+]CK[+]CD45[-] CTC and/or stem cell-like cKIT[+]EPCAM[+ ]CK[+]CD45[-] CTC enumeration and dynamic changes can be prognostic and/or predictive to standard chemotherapy need further investigation in Chinese patients with NSCLC.
A prospective study on the CTC enumeration in advanced NSCLC with 1st line chemotherapy (POLICE) was started by China Thoracic Oncology Group (CTONG). Patients with NSCLC naïve for systemic regimens were enrolled since August 2013. CTCs were detected by Cell Search Platform and identified as positive for EPCAM[+]CK[+]CD45[-] phenotype. CD117 (cKIT) marker was added to test the frequency of stem cell-like cKIT[+]EPCAM[+]CK[+]CD45[- ]CTCs. Primary endpoints were CTC counts and its correlation with first line therapy.
Totally 180 patients were enrolled. In 174 case total CTC and cKIT[+]CTC positive (cutoff >=1) rates were 38.5% (67/172) vs 14.3% (24/168), 21.8% (31/142) vs 6.3% (9/142), 13.7% (13/95) vs 6.4% (6/94) and 40.4% (38/94) vs 15.0% (13/93) at time-points of baseline, after first-cycle-chemo, after four-cycles-chemo and disease progression. At time immediately after first-cycle-chemo, patients in CTC=0 group got statistically higher ORR (29.0% VS 7.1%, P=0.017) and DCR (74.2% VS 42.9%, P=0.002) than in CTC>=1 group. At time after four-cycles-chemo, patients in CTC=0 group got statistically higher DCR (88.3% VS 58.3%, P=0.026) than in CTC>=1 group. At time either after first-cycle-chemo or after four-cycles-chemo, patients in CTC>=1 group got worse PFS (5.7m VS 4.0m, P=0.025; 6.3m VS 4.0m, P=0.001 ) than in CTC=0 group. At time after first-cycle-chemo, patients in groups cKIT[+]CTC>=1 and cKIT[-]CTC>=1 got worse PFSs (3.1m vs 4.0m vs 5.7m, P=0.001) and worse DCRs (44.4% vs 42.1% vs 73.9%, P=0.009) than in CTC=0 group. For 142 patients categorized into three groups of dynamic CTC decrease (17), CTC unchanged (82), and CTC increase (43), there were significant differences in terms of DCR (71.8% vs 71.6% vs 33.3%, P=0.018) and PFS (5.2m vs 5.6m vs 3.1m, P=0.037).
In first line setting of advanced NSCLC, at time-points after first-cycle-chemo other than baseline, total CTC or cKIT[+]CTC counts could be predictive for worse DCR or PFS. CTC increase from baseline to after-first-cycle-chemo might be a strong signal for the inefficacy of first line chemotherapy in the NSCLC patients.
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P1.05 - Poster Session with Presenters Present (ID 457)
- Event: WCLC 2016
- Type: Poster Presenters Present
- Track: Early Stage NSCLC
- Presentations: 1
- Coordinates: 12/05/2016, 14:30 - 15:45, Hall B (Poster Area)
P1.05-046 - Randomized Study of Adjuvant Docetaxel vs. Observation for Completely Resected StageⅠB-Ⅲa NSCLC with 11 Years' Median Follow-Up (ID 5722)
14:30 - 15:45 | Author(s): H. Yan
Although previous meta-analyses have verified the significance of adjuvant chemotherapy, the role of adjuvant carbopatin plus docetaxel(DC) among patients with completely resected NSCLC with long periods of follow-up remains unclear.
Eligible patients were randomly assigned to 4 cycles of DC or observation after complete resection. The primary end point was DFS; secondary ones were OS, the toxicity and safety of drugs. An increase of 15% in 1-year survival rate (observation arm 70%) with a sample size of 270 patients was considered significant.
This trial was suspended prematurely in June 2005 due to the negative survival benefits from chemotherapy in stage IB patients in the JBR10 trial. 82 patients were enrolled between 2002 to 2005(43 and 39 in each arm).Two arms were well-balanced on age, gender, histology, smoking history and staging. Median follow-up was 11 years(10.5-13y). DFS was marginally significantly longer in DC arm than observation (10.4 vs. 3.7y; HR=0.58; 95% CI, 0.33-1.03; P=0.06), as was 5-year DFS rates(63% vs. 41%, P=0.057). No statistical significance existed in OS (NR vs. 7.1y; P=0.103) or 5-year survival rates(76% vs. 61%; P=0.148). Multivariable analysis revealed patients receiving adjuvant DC(HR=0.54，95%CI 0.30-0.96，P=0.036) and with stage IB disease(HR=0.34，95%CI, 0.19-0.61，P<0.001) bore lower recurrence risk. In DC arm, 84% of patients received at least one cycle of DC, and 53% of patients finished four. Grades 3 adverse events occurred in 5%(2/43) in chemotherapy group. The time-varying endpoints showed adjuvant DC could delay the recurrence and mortality in the first postoperative 5ys, while two arms tended to be equivalent after 5ys. Figure 1
This is the first randomized trial used DC as adjuvant chemotherapy suggesting a potentially significant role for completely resected early stage NSCLC with safety and compliance. Additionally, at least 10ys’ follow-up for each patient was vital to investigate the long-term time-varying recurrence and mortality pattern.