{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,29]],"date-time":"2026-07-29T16:57:24Z","timestamp":1785344244627,"version":"3.55.0"},"reference-count":26,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2019,1,7]],"date-time":"2019-01-07T00:00:00Z","timestamp":1546819200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Intl Journal of Cancer"],"published-print":{"date-parts":[[2019,4]]},"abstract":"<jats:p>The mTOR inhibitor everolimus is effective against advanced pancreatic neuroendocrine tumors (pNETs). However, it can cause metabolic adverse events, such as hyperglycemia, hypertriglyceridemia and hypercholesterolemia. In this work we aimed at evaluating the impact of systemic and tumor lipid metabolism on everolimus efficacy. We carried out a monocentric, retrospective study to correlate plasma triglyceride and cholesterol levels with the progression free survival (PFS) of advanced pNET patients treated with everolimus. In formalin fixed, paraffin embedded (FFPE) tumor specimens, we also assessed by mRNA quantification and immunohistochemistry the expression of acetyl\u2010CoA carboxylase 1 (ACC1) and fatty acid synthase (FASN), two enzymes crucially involved in fatty acid biosynthesis, and we analyzed their impact on PFS. We evaluated 58 consecutive pNET patients who started everolimus between December 2006 and January 2015. Patients with higher plasma triglycerides during the first 3 months of treatment had an increased risk of disease progression (aHR 3.08, 95% CIs 1.15\u20138.21; <jats:italic>p<\/jats:italic> = 0.025). In 23 FFPE tumor specimens amenable for IHC evaluations, we found a positive correlation between ACC1 and FASN at both mRNA (<jats:italic>r<\/jats:italic> = 0.87, <jats:italic>p<\/jats:italic> = 0.00045) and protein (<jats:italic>r<\/jats:italic> = 0.68, <jats:italic>p<\/jats:italic> = 0.0004) level. Patients with higher ACC1 protein expression in metastatic lesions had significantly lower PFS when compared to patients with lower ACC1 levels (5.5 <jats:italic>vs<\/jats:italic>. 36 months; aHR 4.49, 95% CIs 1.08\u201318.72; <jats:italic>p<\/jats:italic> = 0.039). In conclusion, systemic and tumor lipid metabolism are associated with the PFS of everolimus\u2010treated patients with advanced pNETs; based on these findings, dietary and pharmacological interventions targeting lipid metabolism could improve everolimus efficacy in this patient population.<\/jats:p>","DOI":"10.1002\/ijc.32042","type":"journal-article","created":{"date-parts":[[2018,12,6]],"date-time":"2018-12-06T07:39:57Z","timestamp":1544081997000},"page":"1704-1712","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":28,"title":["Impact of systemic and tumor lipid metabolism on everolimus efficacy in advanced pancreatic neuroendocrine tumors (pNETs)"],"prefix":"10.1002","volume":"144","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1577-8176","authenticated-orcid":false,"given":"Claudio","family":"Vernieri","sequence":"first","affiliation":[{"name":"Medical Oncology Department Fondazione IRCCS Istituto Nazionale per lo 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