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Enriched Natural Killer Cells for Adoptive Infusion Cancer Therapy

Posted Jun 13 2010 5:00pm

Description of Invention:
Immuno-therapy has taken a lead among the new cancer therapeutic approaches. It is one of the most promising new therapeutic approaches that exploit the innate immune mechanism of an individual to fight against a certain disease.

Natural killer (NK) cells are a form of cytotoxic lymphocytes which constitute a major portion of the innate immune system. NK cells have tumor cytotoxic properties independent of tumor specific antigens and have been shown in murine models to control and prevent tumor growth and dissemination. Inactivation of NK cells potentially allows cancer cells to evade host NK-cell-mediated immunity. Ligation of killer immunoglobulin like receptors (KIRs) by MHC class I on both normal and malignant tissues suppresses the function of NK cells.

The present invention relates to treating cancer and other hyperproliferative disorders by administering an enriched composition of allogeneic or autologous (KIR/KIR ligand incompatible) NK cell population. This enriched composition can potentially override the inactivation of NK cells by self HLA molecules or MHC class I expressing tumors. Claims cover compositions of enriched NK cell populations and method of treating malignancies or prevent recurrence of malignancies and treating any hyperproliferative disorders with these enriched compositions. Claims also cover a method to sensitize malignancies to NK cell TRAIL-mediated killing by pretreatment with bortezomib.

  • New adoptive infusion immunotherapeutic method for treating solid tumors
  • New cancer treatment method exploiting the function of NK cells
  • Enriched composition of allogeneic and autologous NK cell population
  • Enriched NK cell composition has potential to override the natural NK cell inactivation process by HLA or MHC class I expressing tumors
  • Sensitizing cancers to adoptively infused NK cells by treatment with bortezomib as a method to sensitize to NK cell TRAIL cytotoxicity

Development Status:
The technology is currently in the pre-clinical stage of development.

Richard W Childs (NHLBI)

Patent Status:
HHS, Reference No. E-183-2004/1
US, Application No. 11/718,387 filed 01 May 2007

Relevant Publication:
  1. T Igarashi et al. Enhanced cytotoxicity of allogeneic NK cells with killer immunoglobulin-like receptor ligand incompatibility against melanoma and renal cell carcinoma cells. Blood. 2004 Jul 1;104(1):170-177. [ PubMed abs ]
  2. A Lundqvist et al. Bortezomib and depsipeptide sensitize tumors to tumor necrosis factor-related apoptosis-inducing ligand: a novel method to potentiate natural killer cell tumor cytotoxicity. Cancer Res. 2006 Jul 15;66(14):7317-7325. PubMed abs]
  3. A Lundqvist et al. Reduction of GVHD and enhanced anti-tumor effects after adoptive infusion of alloreactive Ly49-mismatched NK-cells from MHC-matched donors. Blood. Prepublished online 2006 Dec 19, doi 10.1182/blood-2006-05-024315. PubMed abs]

Licensing Status:
Available for exclusive and non-exclusive licensing.

Collaborative Research Opportunity:
The Hematology Branch of the National Heart, Lung, and Blood Institute is seeking statements of capability or interest from parties interested in collaborative research to further develop, evaluate, or commercialize the use of in vitro expanded adoptively infused NK cells to treat advanced and incurable cancers. Please contact Dr. Richard W. Childs at 301/496-5093 or 301/451-7128 (email: ) for more information.

Cancer - Therapeutics
In-vitro Data

For Additional Information Please Contact:
Surekha Vathyam Ph.D.
NIH Office of Technology Transfer
6011 Executive Blvd. Suite 325,
Rockville, MD 20852
United States
Phone: 301-435-4076
Fax: 301-402-0220

Ref No: 1492

Updated: 06/2010

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