Open Access

In vitro and in vivo effects of AVA4746, a novel competitive antagonist of the ligand binding of VLA‑4, in B‑cell acute lymphoblastic leukemia

  • Authors:
    • Yongsheng Ruan
    • Hye Na Kim
    • Heather A. Ogana
    • Eun Ji Gang
    • Shuangyue Li
    • Hsiao-Chuan Liu
    • Deepa Bhojwani
    • Alan S. Wayne
    • Mo Yang
    • Yong-Mi Kim
  • View Affiliations

  • Published online on: November 15, 2021     https://doi.org/10.3892/etm.2021.10969
  • Article Number: 47
  • Copyright: © Ruan et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Treatment of resistant or recurrent acute lymphoblastic leukemia (ALL) remains a challenge. It was previously demonstrated that the adhesion molecule integrin α4, referred to hereafter as α4, mediates the cell adhesion‑mediated drug resistance (CAM‑DR) of B‑cell ALL by binding to vascular cell adhesion molecule‑1 (VCAM‑1) on bone marrow stroma. In addition, it was previously observed that the blockade of α4 with natalizumab or inhibition using the small molecule antagonist TBC3486 sensitized relapsed ALL cells to chemotherapy. However, α4‑targeted therapy is not clinically available for the treatment of leukemia to date. In the present study, the use of a novel non‑peptidic small molecule integrin α4 antagonist, AVA4746, as a potential new approach to combat drug‑resistant B‑ALL was explored. An in vitro co‑culture = model of primary B‑ALL cells and an in vivo xenograft model of patient‑derived B‑ALL cells were utilized for evaluation of AVA4746. VLA‑4 conformation activation, cell adhesion/de‑adhesion, endothelial tube formation, in vivo leukemia cell mobilization and survival assays were performed. AVA4746 exhibited high affinity for binding to B‑ALL cells, where it also efficiently blocked ligand‑binding to VCAM‑1. In addition, AVA4746 caused the functional de‑adhesion of primary B‑ALL cells from VCAM‑1. Inhibition of α4 using AVA4746 also prevented angiogenesis in vitro and when applied in combination with chemotherapy consisting of Vincristine, Dexamethasone and L‑asparaginase, it prolonged the survival of ~33% of the mice in an in vivo xenograft model of B‑ALL. These data implicate the potential of targeting the α4‑VCAM‑1 interaction using AVA4746 for the treatment of drug‑resistant B‑lineage ALL.
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January-2022
Volume 23 Issue 1

Print ISSN: 1792-0981
Online ISSN:1792-1015

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Spandidos Publications style
Ruan Y, Kim HN, Ogana HA, Gang EJ, Li S, Liu H, Bhojwani D, Wayne AS, Yang M, Kim Y, Kim Y, et al: <em>In vitro</em> and <em>in vivo</em> effects of AVA4746, a novel competitive antagonist of the ligand binding of VLA‑4, in B‑cell acute lymphoblastic leukemia. Exp Ther Med 23: 47, 2022
APA
Ruan, Y., Kim, H.N., Ogana, H.A., Gang, E.J., Li, S., Liu, H. ... Kim, Y. (2022). <em>In vitro</em> and <em>in vivo</em> effects of AVA4746, a novel competitive antagonist of the ligand binding of VLA‑4, in B‑cell acute lymphoblastic leukemia. Experimental and Therapeutic Medicine, 23, 47. https://doi.org/10.3892/etm.2021.10969
MLA
Ruan, Y., Kim, H. N., Ogana, H. A., Gang, E. J., Li, S., Liu, H., Bhojwani, D., Wayne, A. S., Yang, M., Kim, Y."<em>In vitro</em> and <em>in vivo</em> effects of AVA4746, a novel competitive antagonist of the ligand binding of VLA‑4, in B‑cell acute lymphoblastic leukemia". Experimental and Therapeutic Medicine 23.1 (2022): 47.
Chicago
Ruan, Y., Kim, H. N., Ogana, H. A., Gang, E. J., Li, S., Liu, H., Bhojwani, D., Wayne, A. S., Yang, M., Kim, Y."<em>In vitro</em> and <em>in vivo</em> effects of AVA4746, a novel competitive antagonist of the ligand binding of VLA‑4, in B‑cell acute lymphoblastic leukemia". Experimental and Therapeutic Medicine 23, no. 1 (2022): 47. https://doi.org/10.3892/etm.2021.10969