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Therapeutic salivary monitoring of IV busulfan in patients undergoing hematopoietic stem cell transplantation: a pilot study

Bone Marrow Transplantation volume 52, pages 1384–1389 (2017)Cite this article

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Abstract

Individual therapeutic monitoring of busulfan (BU) minimizes its toxicity and improves the therapeutic outcomes during hematopoietic stem cell transplantation (HSCT). For individual dose adjustment, several blood collections are performed that are uncomfortable for patients. The aim of this pilot study was to validate a laboratory method for quantification of BU in saliva and to present the results obtained using this protocol in HSCT patients. We performed analyses of selectivity, precision and accuracy of saliva with standard concentrations of BU using ultra-high-performance liquid chromatography with diode array detection. We also determined salivary and plasmatic concentrations of BU in six HSCT patients. Saliva exhibited excellent selectivity, precision and accuracy for quantification of BU. In the patient samples, significant correlations were noted between plasmatic and salivary concentrations of BU (r=0.97, P<0.001 in the test dose; r=0.93, P<0.001 in the adjusted dose). Passing & Bablok regression revealed good agreement between the two methods (R2=0.956 for test dose; R2=0.927 for adjusted dose). In conclusion, the saliva is safe for laboratory BU measurement. The good agreement with plasma encourages further clinical studies using saliva for BU therapeutic monitoring.

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Authors and Affiliations

  1. Department of Hematopoietic Stem Cell Transplantation, Hospital Israelita Albert Einstein (HIAE), São Paulo, Brazil

    L M Bezinelli, F P Eduardo, I Esteves & N Hamerschlak

  2. Department of General Pathology, School of Dentistry, University of São Paulo, São Paulo, Brazil

    D L C de Carvalho & L Corrêa

  3. Department of Clinical Pathology, Hospital Israelita Albert Einstein (HIAE), São Paulo, Brazil

    C E dos Santos Ferreira, E V de Almeida, L R Sanches & P V Campregher

Authors
  1. L M Bezinelli
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  2. F P Eduardo
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  3. D L C de Carvalho
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  4. C E dos Santos Ferreira
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  5. E V de Almeida
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  6. L R Sanches
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  7. I Esteves
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  8. P V Campregher
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  9. N Hamerschlak
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  10. L Corrêa
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Correspondence to L Corrêa.

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Bezinelli, L., Eduardo, F., de Carvalho, D. et al. Therapeutic salivary monitoring of IV busulfan in patients undergoing hematopoietic stem cell transplantation: a pilot study. Bone Marrow Transplant 52, 1384–1389 (2017). https://doi.org/10.1038/bmt.2017.142

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  • DOI: https://doi.org/10.1038/bmt.2017.142

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