Title |
Treatment of B-cell precursor acute lymphoblastic leukemia with the Galectin-1 inhibitor PTX008
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Published in |
Journal of Experimental & Clinical Cancer Research, March 2018
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DOI | 10.1186/s13046-018-0721-7 |
Pubmed ID | |
Authors |
Helicia Paz, Eun Ji Joo, Chih-Hsing Chou, Fei Fei, Kevin H. Mayo, Hisham Abdel-Azim, Haike Ghazarian, John Groffen, Nora Heisterkamp |
Abstract |
Drug resistance of B-cell precursor acute lymphoblastic leukemia (BP-ALL) cells is conferred by both intrinsic and extrinsic factors, which could be targeted to promote chemo-sensitization. Our previous studies showed that Galectin-3, a lectin that clusters galactose-modified glycoproteins and that has both an intracellular and extracellular location, protects different subtypes of BP-ALL cells against chemotherapy. Galectin-1 is related to Galectin-3 and its expression was previously reported to be restricted to the MLL subtype of BP-ALL. Here, we report that Galectin-1 is expressed at different levels in and on different subclasses of BP-ALLs. Bone marrow plasma also contains high levels of Galectin-1. PTX008 is an allosteric inhibitor which inhibits Galectin-1 but not Galectin-3-mediated agglutination. The compound reduces migration of BP-ALL cells to CXCL12 and OP9 stromal cells and inhibits fibronectin-mediated adhesion. It also affects cell cycle progression of BCP-ALL cells. PTX008 is cytostatic for BP-ALL cells even when these are co-cultured with protective stroma, and can sensitize ALL cells to vincristine chemotherapy in vitro and in mice. PTX008 inhibits multiple functions that contribute to BP-ALL survival. The effects of Galectin-1 inhibition on both BP-ALL cell proliferation and migration suggest both the leukemia cells as well as the microenvironment that protects these cells may be targeted. |
X Demographics
Geographical breakdown
Country | Count | As % |
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Argentina | 2 | 33% |
Unknown | 4 | 67% |
Demographic breakdown
Type | Count | As % |
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Members of the public | 6 | 100% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
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Unknown | 30 | 100% |
Demographic breakdown
Readers by professional status | Count | As % |
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Student > Ph. D. Student | 6 | 20% |
Student > Bachelor | 6 | 20% |
Other | 3 | 10% |
Researcher | 3 | 10% |
Student > Master | 2 | 7% |
Other | 2 | 7% |
Unknown | 8 | 27% |
Readers by discipline | Count | As % |
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Biochemistry, Genetics and Molecular Biology | 9 | 30% |
Chemistry | 3 | 10% |
Pharmacology, Toxicology and Pharmaceutical Science | 2 | 7% |
Agricultural and Biological Sciences | 2 | 7% |
Immunology and Microbiology | 2 | 7% |
Other | 4 | 13% |
Unknown | 8 | 27% |