The Impact of MRI on Genitourinary and Gastrointestinal Toxicity after Radiation Therapy
Poster Feb 21, 2017
Kyle Kilinski; Arash Naghavi, MD; Yazan Abuodeh, MD; Michelle Echevarria, MD2; Nainesh Parikh, MD; Kenneth Gage, MD, PhD; Kosj Yamoah, MD, PhD
MRI has several advantages relative to other imaging modalities in evaluating, diagnosing, and planning treatment for prostate cancer. However, it is rarely ordered for localized disease. While the diagnostic abilities have been studied, little has been done to associate clinical outcomes with prostate cancer patients who received MRI. The study evaluates the effect of pre-treatment MRI on genitourinary (GU) and gastrointestinal (GI) toxicity in prostate cancer patients who received definitive radiation treatment.
We retrospectively analyzed all prostate cancer patients who underwent definitive radiation treatment at our facility between January 01, 1999 and July 31, 2014. All patients who underwent MRI of the pelvis or prostate within 5 years prior to treatment were included in the MRI cohort. The American Urological Symptom Score (AUA) and Rectal Assessment Scale (RAS) were used to measure GU and GI toxicity, respectively. We compared the toxicity profile of patients in our MRI cohort to a comparable cohort of patients who did not receive pre-treatment MRI.
1085 patients (211 with MRI) were analyzed. Median follow-up was 30 months. Mean increase from baseline in AUA scores at 6 months was 3.58 for the MRI cohort and 5.04 for the comparison cohort (p = 0.017). RAS scores were not significantly different between the MRI and comparison cohorts at 6 months (mean increase: 0.62 vs. 0.77, p = 0.662). AUA scores returned to baseline after 6 months in the MRI cohort and after 12 months in the comparison cohort. RAS scores returned to baseline after 12 months in the MRI cohort but never returned to baseline in the comparison cohort. Biochemical failure rates were not significantly different between the MRI cohort and comparison cohort (86.3% vs. 91.1%, p = 0.083).
Proteomics and Substrate Based MS Imaging of Xenobiotic Metabolising Enzymes in Ex Vivo Human Skin and a Human Living Skin Equivalent ModelPoster
Untargeted proteomics analysis showed that human skin and a commercially available living skin equivalent model exhibit a similar distribution of xenobiotic metabolising enzymes. A new technique, substrate based mass spectrometry imaging (SB-MSI) was developed during this study.READ MORE
Development and Assessment of Non-Infected and Infected Skin Models Using MALDI-MSIPoster
Infections have detrimental effects on wound healing leading to chronic wound formation. The use of labskin,a living skin model, in combination with mass spectrometry imaging, provides a good model for assessing wound healing factors.READ MORE
Exploiting Polypharmacology in Precision Oncology: Identification of Differential Kinase Off-targets Among Clinical PARP InhibitorsPoster
Can we use computational methods to identify previously unknown off-targets of PARP inhibitors that can explain their observed differences?READ MORE