The rationale for supplementation with n-3 fatty acids to promote the health of the gastrointestinal tract lies in the antiinflammatory effects of these lipid compounds. The first evidence of the importance of dietary intake of n-3 polyunsaturated fatty acids was derived from epidemiologic observations of the low incidence of inflammatory bowel disease in Eskimos. The aim of this paper was to briefly review the literature on the use of n-3 fatty acids in inflammatory bowel disease (ulcerative colitis and Crohn disease), the results of which are controversial. The discrepancies between studies may reside in the different study designs used as well as in the various formulations and dosages used, some of which may lead to a high incidence of side effects. Choosing a formulation that lowers the incidence of side effects, selecting patients carefully, and paying strict attention to experimental design are critical when investigating further the therapeutic potential of these lipids in inflammatory bowel disease.
In our experimental conditions, (18)F-fluciclovine provided a statistically significant better performance in terms of lesion detection rate as compared with (11)C-choline. However, more studies are required to evaluate the clinical significance of these results in terms of sensitivity, specificity, and accuracy.
In our study, (11)C-choline PET/CT was able to detect recurrent disease in 28% of the patients with mild biochemical relapse characterized by very low trigger PSA levels (PSA <1.5 ng/ml). Very interestingly (11)C-choline PET/CT detected distant unexpected metastases in 21% of the patients. At multivariate statistical analysis only PSAdt and node status were shown to be significant and independent predictive factors for positive (11)C-choline PET/CT. Therefore, (11)C-choline could be suggested to be performed early during initial biochemical relapse in patients presenting with fast PSA kinetics. The early detection of the site of recurrence could lead to a prompt instauration of the most appropriate treatment, i.e. local surgery or radiation treatment vs systemic treatment. In this view, one of the main advantages should be the avoidance of unnecessary local radiotherapy in those patients showing distant metastasis at (11)C-choline PET/CT.
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