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The metronomic therapy with prednisone, etoposide, and cyclophosphamide reduces the serum levels of VEGF and circulating endothelial cells and improves response rates and progression-free survival in patients with relapsed or refractory non-Hodgkin’s lymphoma

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Abstract

Purpose

There is an urgent need for a better strategy in the management of relapsed or refractory non-Hodgkin’s lymphoma (NHL). The present study was designed to evaluate the efficacy and safety of the regimen using metronomic prednisone, etoposide, and cyclophosphamide in the treatment of patients with relapsed or refractory NHL, in comparison with conventional salvage chemotherapy.

Methods

Eligible patients were randomized to the test group (n = 23) receiving metronomic prednisone, etoposide, and cyclophosphamide or the control group (n = 21) receiving conventional salvage chemotherapy. The serum levels of circulating endothelial cells (CECs) and vascular endothelial growth factor (VEGF) were measured before and after two cycles of treatment; overall response rate (ORR) and disease control rate (DCR) were evaluated at cycles 2, 4, 6, and 12 months after treatment.

Results

After two cycles of treatment, the ORRs of the test and control groups were statistically similar, while the DCR of the test group (87.0 %) was significantly higher than that of the control group (57.1 %). At 12 months after treatment, the ORR and DCR of the test group (47.8 and 69.6 %, respectively) were significantly higher than that of the control group (19.0 and 33.3 %, respectively). The serum CECs and VEGF levels in the test group after treatment were significantly lower than that before treatment or that of the control group. In the patients with ORR and DCR in the test group, the serum CECs and VEGF levels remained relatively low at cycles 2, 4, and 6 and at 12 months after treatment. There was a progression-free survival (PFS) benefit of 6.5 months in the test group, compared with the control group.

Conclusion

Metronomic chemotherapy with prednisone, etoposide, and cyclophosphamide resulted in higher ORR and DCR, fewer adverse effects, and longer PFS in patients with relapsed or refractory NHL, with significant reduction in serum CECs and VEGF levels.

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Acknowledgments

This Project was supported by the key medical research projects of Hainan Health Department (Grant No. 2010-19).

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Correspondence to Yanda Lu or Xinbao Hao.

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Conflict of interest

The authors declare that they have no conflict of interest.

Additional information

Jiangzheng Zeng and Liangxia Yang contributed equally to this article.

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Zeng, J., Yang, L., Huang, F. et al. The metronomic therapy with prednisone, etoposide, and cyclophosphamide reduces the serum levels of VEGF and circulating endothelial cells and improves response rates and progression-free survival in patients with relapsed or refractory non-Hodgkin’s lymphoma. Cancer Chemother Pharmacol 78, 801–808 (2016). https://doi.org/10.1007/s00280-016-3136-1

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