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Year : 2017  |  Volume : 7  |  Issue : 3  |  Page : 136-140

Could salivary cyclosporine dosage replace the whole blood cyclosporine measurements in renal transplant patients?

1 Department of Pediatric Dentistry, Faculty of Dental Medicine, Lebanese University, Hadat, Lebanon
2 Research Laboratory, Transmedical for Life, Lebanon
3 Department of Basic Sciences, Division of Immunology, Faculty of Medicine, Lebanese University, Hadat, Lebanon
4 Medical Student, American University of Beirut, Lebanon
5 Department of Periodontology and Research, Faculty of Dental Medicine, Lebanese University, Hadat, Lebanon

Correspondence Address:
Samia Aboujaoude
Department of Pediatric Dentistry, Faculty of Dentistry, Lebanese University, Hadath, Beirut
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/jispcd.JISPCD_60_17

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Background: Cyclosporin (CsA) has been extensively used as the immunosuppressant of choice in renal transplantation. Currently available approaches to assess CsA levels, both in serum and blood, fail to accurately reflect the concentration of the pharmacologically active drug fraction. Free CsA levels in biological fluids (blood or saliva) have been advocated to play an important role. Traditional salivary CsA monitoring tests are based on available archaic salivary techniques that are nonspecific and require large amounts of saliva. The aim of this study was to assess salivary CsA correlation using a novel and more accurate technique and to correlate with CsA levels in blood. Material and Methods: Patients provided blood samples of 2 ml and 2 ml of unstimulated saliva on the same day 2 h after the morning CsA dose (C2). Whole blood levels of CsA were determined using the monoclonal fluorescent polarization immunoassay (FPIA) kit. The FPIA kit was adapted to salivary testing by using a novel extraction method developed and patented under the name of Middle East Research Institute (MERI). Wilcoxon signed rank test compared the differences in blood and salivary CsA. Pearson's correlation coefficient assessed the linear association between blood and salivary CsA concentrations. All analyses were performed using IBM-SPSS version 23 (IBM Corp, Armonk, NY, USA). Results: No significant correlation was observed between blood and salivary CsA levels. Conclusion: Salivary CsA concentrations at C2cannot adequately replace C2blood levels as an indicator of CsA bioavailability despite improved performance of monoclonal FPIA and application of the MERI technique. More studies may be warranted to design more reliable and less invasive procedures for therapeutic drug monitoring.

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