ROR1-targeted delivery of OSU-2S, a nonimmunosuppressive FTY720 derivative, exerts potent cytotoxicity in mantle-cell lymphoma in vitro and in vivo

Exp Hematol. 2015 Sep;43(9):770-4.e2. doi: 10.1016/j.exphem.2015.04.008. Epub 2015 Apr 29.

Abstract

Mantle-cell lymphoma (MCL) remains incurable despite numerous therapeutic advances. OSU-2S, a novel nonimmunosuppressive FTY720 (Fingolimod) derivative, exhibits potent cytotoxicity in MCL cell lines and primary cells. OSU-2S increased the surface expression of CD74, a therapeutic antibody target in MCL cells. OSU-2S, in combination with anti-CD74 antibody milatuzumab, enhanced cytotoxicity in MCL. Moreover, MCL tumor antigen receptor tyrosine kinase-like orphan receptor 1 (ROR1) targeted immunonanoparticle-carrying OSU-2S (2A2-OSU-2S-ILP)-mediated selective cytotoxicity of MCL in vitro, as well as activity in a xenografted mouse model of MCL in vivo. The newly developed OSU-2S delivery using ROR1-directed immunonanoparticles provide selective targeting of OSU-2S to MCL and other ROR1(+) malignancies, sparing normal B cells.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Animals
  • Antibodies, Monoclonal, Humanized / pharmacology
  • Antigens, Differentiation, B-Lymphocyte / genetics
  • Antigens, Differentiation, B-Lymphocyte / metabolism
  • Antigens, Neoplasm / metabolism
  • Cytotoxins / pharmacology*
  • Drug Delivery Systems*
  • Fingolimod Hydrochloride
  • Histocompatibility Antigens Class II / genetics
  • Histocompatibility Antigens Class II / metabolism
  • Humans
  • Lymphoma, Mantle-Cell / genetics
  • Lymphoma, Mantle-Cell / metabolism*
  • Mice
  • Mice, Inbred NOD
  • Propylene Glycols / pharmacology*
  • Receptor Tyrosine Kinase-like Orphan Receptors / genetics
  • Receptor Tyrosine Kinase-like Orphan Receptors / metabolism*
  • Sphingosine / analogs & derivatives*
  • Sphingosine / pharmacology
  • Xenograft Model Antitumor Assays

Substances

  • Antibodies, Monoclonal, Humanized
  • Antigens, Differentiation, B-Lymphocyte
  • Antigens, Neoplasm
  • Cytotoxins
  • Histocompatibility Antigens Class II
  • OSU-2S
  • Propylene Glycols
  • invariant chain
  • milatuzumab
  • ROR1 protein, human
  • Receptor Tyrosine Kinase-like Orphan Receptors
  • Fingolimod Hydrochloride
  • Sphingosine