Effects of combined sunitinib and extracranial stereotactic radiotherapy on bone marrow hematopoiesis

  • Authors:
    • Johnny Kao
    • Jonathan Timmins
    • Junko Ozao‑Choy
    • Stuart Packer
  • View Affiliations

  • Published online on: July 13, 2016     https://doi.org/10.3892/ol.2016.4851
  • Pages: 2139-2144
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Abstract

There is considerable interest in deploying stereotactic body radiotherapy in combination with immune therapy for patients with extracranial oligometastases. In addition to angiogenesis inhibition, sunitinib appears to mediate antitumor immunity through effects on circulating monocytic cells. The current study investigated the effects of combined sunitinib and stereotactic radiotherapy on hematopoiesis. As part of a phase I/II clinical trial utilizing concurrent sunitinib (25‑50 mg on days 1‑28) and image‑guided radiation therapy (40-50 Gy in 10 fractions starting on days 8‑19) for patients with metastatic cancer, the complete blood count, platelet count and automatic differential were performed pretreatment and on days 8 and 19. On average, sunitinib monotherapy for 7 days resulted in a 33% decrease in monocytes and an 18% decrease in neutrophils (P<0.01 for all). Compared to sunitinib alone, combined sunitinib and radiation resulted in a further decrease in neutrophils, lymphocytes and platelets (P<0.05). Following sunitinib and radiation treatment, a greater than average decrease in monocytes (≥200/µl) was associated with a significant increase in progression‑free and overall survival times. This exploratory study provides further evidence that monocytes represent a potential biomarker in patients with solid tumors treated with sunitinib.
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September-2016
Volume 12 Issue 3

Print ISSN: 1792-1074
Online ISSN:1792-1082

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Spandidos Publications style
Kao J, Timmins J, Ozao‑Choy J and Packer S: Effects of combined sunitinib and extracranial stereotactic radiotherapy on bone marrow hematopoiesis. Oncol Lett 12: 2139-2144, 2016
APA
Kao, J., Timmins, J., Ozao‑Choy, J., & Packer, S. (2016). Effects of combined sunitinib and extracranial stereotactic radiotherapy on bone marrow hematopoiesis. Oncology Letters, 12, 2139-2144. https://doi.org/10.3892/ol.2016.4851
MLA
Kao, J., Timmins, J., Ozao‑Choy, J., Packer, S."Effects of combined sunitinib and extracranial stereotactic radiotherapy on bone marrow hematopoiesis". Oncology Letters 12.3 (2016): 2139-2144.
Chicago
Kao, J., Timmins, J., Ozao‑Choy, J., Packer, S."Effects of combined sunitinib and extracranial stereotactic radiotherapy on bone marrow hematopoiesis". Oncology Letters 12, no. 3 (2016): 2139-2144. https://doi.org/10.3892/ol.2016.4851