Balixafortide TFA (POL6326 TFA) is a potent, selective, well-tolerated peptidic CXCR4 antagonist with an IC50 < 10 nM. Balixafortide TFA shows 1000-fold selective for CXCR4 than a large panel of receptors including CXCR7. Balixafortide TFA blocks β-arrestin recruitment and calcium flux with IC50s < 10 nM. Balixafortide TFA is also a potent hematopoietic stem and progenitor cell (HSPC) mobilizing agent. Anti-cancer effects[1][2].
[1]. Zimmermann J, et al. Anti-tumor cell activity and in vitro profile of the next generation CXCR4 antagonist Balixafortide. Ann Oncol. 2018 Oct;29 Suppl 8:viii103. [2]. Karpova D, et al. Mobilization of hematopoietic stem cells with the novel CXCR4 antagonist POL6326 (balixafortide) in healthy volunteers-results of a dose escalation trial. J Transl Med. 2017 Jan 3;15(1):2.