Intraperitoneal delivery of human natural killer cells for treatment of ovarian cancer in a mouse xenograft model

Melissa A. Geller, David A. Knorr, David A. Hermanson, Lee Pribyl, Laura Bendzick, Valarie Mccullar, Jeffrey S. Miller, Dan S. Kaufman

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

Background aims: There is an urgent need for novel therapeutic strategies for relapsed ovarian cancer. Dramatic clinical anti-tumor effects have been observed with interleukin (IL)-2 activated natural killer (NK) cells; however, intravenous delivery of NK cells in patients with ovarian cancer has not been successful in ameliorating disease. We investigated in vivo engraftment of intraperitoneally (IP) delivered NK cells in an ovarian cancer xenograft model to determine if delivery mode can affect tumor cell killing and circumvent lack of NK cell expansion. Methods: An ovarian cancer xenograft mouse model was established to evaluate efficacy of IP-delivered NK cells. Tumor burden was monitored by bioluminescent imaging of luciferase-expressing ovarian cancer cells. NK cell persistence, tumor burden and NK cell trafficking were evaluated. Transplanted NK cells were evaluated by flow cytometry and cytotoxicity assays. Results: IP delivery of human NK cells plus cytokines led to high levels of circulating NK and was effective in clearing intraperitoneal ovarian cancer burden in xenografted mice. NK cells remained within the peritoneal cavity 54 days after injection and had markers of maturation. Additionally, surviving NK cells were able to kill ovarian cancer cells at a rate similar to pre-infusion levels, supporting that in vivo functionality of human NK cells can be maintained after IP infusion. Conclusions: IP delivery of NK cells leads to stable engraftment and antitumor response in an ovarian cancer xenograft model. These data support further pre-clinical and clinical evaluation of IP delivery of allogeneic NK cells in ovarian cancer.

Original languageEnglish (US)
Pages (from-to)1297-1306
Number of pages10
JournalCytotherapy
Volume15
Issue number10
DOIs
StatePublished - Oct 2013

Bibliographical note

Funding Information:
This work was supported in part by National Institutes of Health/National Heart, Lung and Blood Institute grant R01-HL77923 (DSK) and by National Institutes of Health MSTP grant T32 GM008244 (DAK), Stem Cell Biology Training Grant T32 (DAK) ( T32HD060536 ), a Minnesota Ovarian Cancer Research Award (MAG), the Gynecologic Cancer Foundation/Caring Together (MAG), and P50 CA136393 (MAG).

Keywords

  • Bioluminescent imaging
  • Immunotherapy
  • Natural killer (NK) cells
  • Ovarian cancer

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