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ORAL 04 - Adjuvant Therapy for Early Stage Lung Cancer (ID 99)
- Event: WCLC 2015
- Type: Oral Session
- Track: Treatment of Localized Disease - NSCLC
- Presentations: 1
ORAL04.02 - Research of Vascular Targeted Therapy in the Postoperative Adjuvant Chemotherapy for Lung Cancer (ID 1339)
10:45 - 12:15 | Author(s): Z. Chen
Postoperative adjuvant chemotherapy is extensively received due to its extension of the time to recurrence and enhancement of survival rate in NSCLC. However, it has reached the plateau presently, the beneficial cases are few, and drug-resistance and over-treatment phenomena are in most of patients, hence it is necessary to seek new postoperative adjuvant chemotherapy to improve the survival rate. Angiogenesis is one premise of occurrence, development and metastasize of malignant tumors, but VEGF is one of the most important tumors in the process of neovascularization. Under normal conditions, VEGF is hardly expressed in a lot of normal tissues in vivo, while highly expressed in the tumors. Endostatin can significantly intervene the angiogenesis-promoting effect to block the nutritional supply for tumors and inhibit tumor proliferation or metastasis. We compare the curative effect of endostatin plus adjuvant chemotherapy and adjuvant chemotherapy alone in the treatment of patients with completely resected NSCLC at stage IB-IIIA.
This is an open, multicenter, randomized (1:1) study, stratified by gender, stage and histology. Completely resected pts (stage IB to IIIA) were randomized to receive adjuvant NP plus Endostatin (Vinorelbine 25mg/m2 on d1 and d8 plus Cisplatin 75 mg/m2 on d1, and iv plus endostatin 7.5mg/m2 per day iv for consecutive 14 days, every 21 days as one cycle, 4 cycles in total) or NP regimen alone. The primary endpoint was disease-free survival (DFS). Secondary endpoints included tumor response rate, overall survival and safety.
250 pts (1:1) were included from 07/2007 to 06/2009. Two arms were well-balanced with regard to age, gender, histology, staging, and resection type. The follow-up time was 60 months. The two groups had no significant difference in the incidence of toxicity reaction. Endostatin plus NP can prolong the DFS of patients with completely resectable NSCLC at stage IIIA with high security, but with no statistical difference (19.33±3.73 m vs 17.10±9.68 m). Cases with high expression of VEGF showed a better DFS than cases with low expression in endostatin plus NP group (48.45±3.52m vs 40.18±4.54m, P < 0.05). The level of peripheral circulating endothelial progenitor cells (EPCs) in NSCLC patients was significantly higher than that in healthy volunteers. EPCs level was associated with NSCLC stage. The EPCs levels after treatment significantly decreased than that before treatment (P=0.014) in beneficiaries of NP or NP plus with endostatin. The time to progression (TTP) was longer in patients with lower levels of EPCs (<0.35%) before chemotherapy or endostatin treatment (P<0.001). However, no statistically significant difference in OS was noticed between the two arms (P = 0.962). The survival rate of endostatin plus NP group was higher for patients in stage IIIA NSCLC, but the differences did not reach statistical significance (MST 41.267 months vs 39.533 months, P = 0.760).
Vascular targeted therapy could prolong the DFS of patients with complete resectable NSCLC in stage IIIA, but did not show benefits in OS for stage IB−IIIA. We shall develop new strategies to identify the patient subgroups that will be benefited or harmed by vascular targeted therapy.
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