Differential platelet levels affect response to taxane-based therapy in ovarian cancer

Justin Bottsford-Miller, Hyun Jin Choi, Heather J. Dalton, Rebecca L. Stone, Min Soon Cho, Monika Haemmerle, Alpa M. Nick, Sunila Pradeep, Behrouz Zand, Rebecca A. Previs, Chad V. Pecot, Erin King Crane, Wei Hu, Susan K. Lutgendorf, Vahid Afshar-Kharghan, Anil K. Sood

Research output: Contribution to journalArticlepeer-review

53 Scopus citations


Purpose: We hypothesized that platelet levels during therapy could serve as a biomarker for response to therapy and that manipulation of platelet levels could impact responsiveness to chemotherapy. Experimental Design: The medical records of patients with recurrent or progressive ovarian cancer were retrospectively queried for changes in platelet and CA-125 levels during primary therapy. In vitro coculture experiments and in vivo orthotopic models of human ovarian cancer in mice were used to test the effect of modulating platelet levels on tumor growth and responsiveness to docetaxel. Results: Thrombocytosis at the diagnosis of ovarian cancer was correlated with decreased interval to progression (P = 0.05) and median overall survival (P = 0.007). Mean platelet levels corrected during primary therapy and rose at recurrence. Contrary to treatment-responsive patients, in a cohort of patients refractory to primary therapy, platelet levels did not normalize during therapy. In A2780, HeyA8, and SKOV3-ip1 ovarian cancer cell lines, platelet coculture protected against apoptosis (P < 0.05). In orthotopic models of human ovarian cancer, platelet depletion resulted in 70% reduced mean tumor weight (P < 0.05). Compared with mice treated with docetaxel, mice treated with both docetaxel and platelet-depleting antibody had a 62% decrease in mean tumor weight (P = 0.04). Platelet transfusion increased mean aggregate tumor weight 2.4-fold (P < 0.05), blocked the effect of docetaxel on tumor growth (P = 0.55) and decreased tumor cell apoptosis. Pretransfusion aspirinization of the platelets blocked the growth-promoting effects of transfusion. Conclusions: Platelet-driven effects of chemotherapy response may explain clinical observations.

Original languageEnglish (US)
Pages (from-to)602-610
Number of pages9
JournalClinical Cancer Research
Issue number3
StatePublished - Feb 1 2015
Externally publishedYes

ASJC Scopus subject areas

  • Oncology
  • Cancer Research


Dive into the research topics of 'Differential platelet levels affect response to taxane-based therapy in ovarian cancer'. Together they form a unique fingerprint.

Cite this