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Jaramillo AC, Hubeek I, Broekhuizen R, Pastor-Anglada M, Kaspers GJL, Jansen G, Cloos J, Peters GJ. Expression of the nucleoside transporters hENT1 (SLC29) and hCNT1 (SLC28) in pediatric acute myeloid leukemia. Nucleosides Nucleotides Nucleic Acids 2020; 39:1379-1388. [PMID: 32312148 DOI: 10.1080/15257770.2020.1746803] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Cellular uptake of clinically important deoxynucleoside analogs is mediated by nucleoside transporters including the human equilibrative nucleoside transporter 1 (hENT1) and the concentrative nucleoside transporter-1 (hCNT1). These transporters are responsible for influx of cytarabine and reduced hENT1 expression is a major resistance mechanism in acute myeloid leukemia. We determined hENT1 and hCNT1 protein expression by immunocytochemistry in 50 diagnostic pediatric acute myeloid leukemia patient samples. All samples expressed hENT1 [9/43 (21%) low; 26/43 (60%) medium and 8/43 (19%) high] and hCNT1 [2/42 (5%) low; 35/42 (83%) medium and 5/42 (12%) high] at the cell membrane and cytoplasm. Statistical analysis showed a non-significant relationship between survival and transporter expression and in vitro drug sensitivity. In conclusion, the nucleoside transporters hENT1 and hCNT1 are broadly expressed in pediatric acute myeloid leukemia at diagnosis.
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Affiliation(s)
| | - Isabelle Hubeek
- Clinical Chemistry, Amsterdam University Medical Centers, Location VUMC, Amsterdam, The Netherlands
| | - Richard Broekhuizen
- Depts of Pediatric Hematology, Amsterdam University Medical Centers, Location VUMC, Amsterdam, The Netherlands.,Department of Hematology-Oncology, Pontifical Catholic University of Chile, Santiago, Chile
| | - Marçal Pastor-Anglada
- Department de Bioquímica i Biologia Molecular, Universitat de Barcelona, Barcelona, Spain
| | - Gertjan J L Kaspers
- Princess Maxima Center for Pediatric Cancer, Utrecht, and SKION, The Netherlands.,Emma's Children's Hospital, Amsterdam UMC, Location VUMC, Pediatric Oncology, Amsterdam, The Netherlands
| | - Gerrit Jansen
- Reumatology, Amsterdam University Medical Centers, Location VUMC, Amsterdam, The Netherlands
| | - Jacqueline Cloos
- Depts of Pediatric Hematology, Amsterdam University Medical Centers, Location VUMC, Amsterdam, The Netherlands
| | - Godefridus J Peters
- Laboratory Medical Oncology, Amsterdam University Medical Centers, Location VUMC, Amsterdam, The Netherlands.,Department of Biochemistry, Medical University of Gdansk, Gdansk, Poland
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