Conditioning with α-emitter based radioimmunotherapy in canine allogeneic hematopoietic cell transplantation

Abstract

With the introduction of nonmyeloablative conditioning, hematopoietic cell transplantation (HCT) has become a viable treatment option for patients who due to age or comorbidities are ineligible for high dose conditioning. However, relapse and toxicities are still major problems in HCT. Radioimmunotherapy (RIT)-based conditioning is a promising approach that has the ability to specifically target radiation to hematopoietic cells. The most widely investigated isotopes are the β-emitters, but because of long path lengths and low linear energy transfer, α-emitters which have more favorable physical characteristics, might prove to be a better alternative. In the current study we have investigated the efficacy and safety of α-emitter based RIT as the only form of conditioning in a preclinical model of canine allogeneic HCT.

Keywords: :

• allogeneic transplant
• chimerism
• nonmyeloablative
• radioimmunotherapy
• α-emitter

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Acknowledgments

B.K. drafted and revised the manuscript, Y.C. revised the manuscript and B.M.S. conceived, drafted and revised the manuscript. The authors declare no conflicts of interest.