Tooley, K.Saxon, B.Webster, J.Zacharakis, B.McNeil, Y.Davidson, G.Butler, R.2007-07-102007-07-102006Cancer Biology & Therapy, 2006; 5(10):1275-12811538-40471555-8576http://hdl.handle.net/2440/35541Background: Small intestinal mucositis is a common side-effect following high-dose chemotherapy, causing patients to experience pain and abdominal complications often leading to extended stays in hospital. A biomarker to detect these small intestinal changes does not exist in clinical practice. This study aimed to assess the non-invasive 13C-Sucrose breath test (SBT) to detect small intestinal damage associated with mucositis in pediatric cancer patients having chemotherapy. Patients and Methods: Small intestinal function was assessed in 15 pediatric cancer patients and 26 healthy children. Subjects were studied for small intestinal permeability (SIP; lactulose/rhamnose), digestive and absorptive capacity (SBT; sucrose), and oro-cecal transit time (OCTT; lactulose), by ingesting two sugar drinks containing the respective sugars. Combined tests were carried out at baseline, day1, day3-5 and day6-9, and in healthy individuals on two separate occasions. A total of 25 cycles of chemotherapy were assessed. Breath samples for the SBT were collected every 15min for 3 h (expressed as % cumulative dose at 90min (CD)), a 5 h urine collection for SIP and breath hydrogen determined every 30min for 3 h for OCTT. Results: Clinical mucositis occurred in seven of the 25 cycles of chemotherapy (28%). No significant difference was observed for SIP and OCTT. The SBT %CD at 90min was significantly lower in the mucositis group compared to the unaffected group and controls at baseline (p < 0.05). Patients who developed mucositis maintained a significantly lower %CD, for all test points (p < 0.05) compared to the unaffected patients. In patients who developed mucositis the SBT was below the reference range of the controls at all time points. Conclusion: The findings show for the first time that it is possible to non-invasively detect and monitor gut damage associated with chemotherapy-inducedmucositis in pediatric cancer patients.enIntestinal MucosaIntestine, SmallHumansSucroseAntineoplastic AgentsBreath TestsPatient SelectionReference ValuesAdolescentChildChild, PreschoolFemaleMaleMucositisBiomarkersJournal article002006222310.4161/cbt.5.10.33030002432566000132-s2.0-3375111414551757Saxon, B. [0000-0003-1598-5343]