PMID- 36461380 OWN - NLM STAT- MEDLINE DCOM- 20221206 LR - 20221208 IS - 1873-7145 (Electronic) IS - 0963-9969 (Linking) VI - 162 IP - Pt B DP - 2022 Dec TI - Effects of distinct n-6 to n-3 polyunsaturated fatty acid ratios on insulin resistant and AD-like phenotypes in high-fat diets-fed APP/PS1 mice. PG - 112207 LID - S0963-9969(22)01265-0 [pii] LID - 10.1016/j.foodres.2022.112207 [doi] AB - Type 2 diabetes mellitus (T2DM) and Alzheimer's disease (AD) are prevalent diseases with similar pathophysiological characteristics and genetic predispositions. Polyunsaturated fatty acids (PUFAs) are essential in maintaining normal brain function. However, little is known about the effect of dietary n-6/n-3 PUFA ratio on AD-like pathology, particularly in high-fat diet (HFD)-fed AD model mice. In the present study, the APP/PS1 mice were fed with 60 % HFD for 3.5 months to induce insulin resistance. After that, 45 % HFD with various n-6/n-3 PUFA ratios (n-6/n-3 = 1:1, 5:1 or 16:1) was applied for an additional 3.5 months of treatment. The behavior of mice was observed using the water maze after dietary intervention. The animals were euthanized after behavioral testing, and serum and tissue samples were collected for biochemical, histological, and pathological tests and evaluation. HFD caused insulin resistance, increased serum IL-6 and TNF-alpha levels, cortical soluble Abeta(1-40), Abeta(1-42) content, and cortical n-6/n-3 PUFA ratio in APP/PS1 mice. Increased APP and BACE1 protein expression and p-IR/IR ratio but decreased pro-inflammatory cytokines mRNA expression was detected in the cortex of 60 % HFD-fed APP/PS1 mice. N-3 PUFAs-rich diet (n-6/n-3 = 1:1) alleviated insulin resistance and hyperlipidemia caused by 60 % HFD. Cortical soluble Abeta(1-40) and Abeta(1-42) contents, as well as the expression of cortical APP, GLUT1, GLUT3, insulin metabolism-related molecules, and NF-kappaB pathway downstream pro-inflammatory cytokines, were found to be n-6/n-3 PUFAs ratio-dependent, indicating that dietary n-6/n-3 PUFA ratio plays a critical role in modifying the responses of serum inflammatory cytokines, AD pathology, cortical n-6/n-3 PUFAs ratio, insulin signaling, and neuroinflammation to HFD treatment. CI - Copyright (c) 2022 Elsevier Ltd. All rights reserved. FAU - Ma, Xiaojun AU - Ma X AD - Department of Nutrition and Food Hygiene, School of Public Health, Capital Medical University, Beijing, China. FAU - Guo, Yujie AU - Guo Y AD - Department of Nutrition and Food Hygiene, School of Public Health, Capital Medical University, Beijing, China. FAU - Xu, Jingjing AU - Xu J AD - Department of Nutrition and Food Hygiene, School of Public Health, Capital Medical University, Beijing, China. FAU - Wang, Xixiang AU - Wang X AD - Department of Nutrition and Food Hygiene, School of Public Health, Capital Medical University, Beijing, China. FAU - Dong, Shengqi AU - Dong S AD - Department of Nutrition and Food Hygiene, School of Public Health, Capital Medical University, Beijing, China. FAU - Gao, Yanyan AU - Gao Y AD - Department of Nutrition and Food Hygiene, School of Public Health, Capital Medical University, Beijing, China. FAU - Van Halm-Lutterodt, Nicholas AU - Van Halm-Lutterodt N AD - School of Professional Studies, Brown University, Providence, RI, United States. FAU - Yuan, Linhong AU - Yuan L AD - Department of Nutrition and Food Hygiene, School of Public Health, Capital Medical University, Beijing, China; Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, China. Electronic address: ylhmedu@126.com. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20221119 PL - Canada TA - Food Res Int JT - Food research international (Ottawa, Ont.) JID - 9210143 RN - 0 (Insulin) RN - 0 (Fatty Acids, Omega-3) RN - EC 3.4.- (Amyloid Precursor Protein Secretases) RN - EC 3.4.23.- (Aspartic Acid Endopeptidases) RN - 0 (Cytokines) SB - IM MH - Mice MH - Animals MH - Insulin MH - Diet, High-Fat/adverse effects MH - *Fatty Acids, Omega-3 MH - *Alzheimer Disease MH - *Insulin Resistance MH - *Diabetes Mellitus, Type 2 MH - Amyloid Precursor Protein Secretases MH - Aspartic Acid Endopeptidases MH - Phenotype MH - Cytokines OTO - NOTNLM OT - AD-like pathology OT - APP/PS1 mice OT - High-fat diet OT - Insulin resistance OT - N-6/n-3 PUFA ratio COIS- Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. EDAT- 2022/12/04 06:00 MHDA- 2022/12/07 06:00 CRDT- 2022/12/03 01:02 PHST- 2022/08/30 00:00 [received] PHST- 2022/11/12 00:00 [revised] PHST- 2022/11/15 00:00 [accepted] PHST- 2022/12/03 01:02 [entrez] PHST- 2022/12/04 06:00 [pubmed] PHST- 2022/12/07 06:00 [medline] AID - S0963-9969(22)01265-0 [pii] AID - 10.1016/j.foodres.2022.112207 [doi] PST - ppublish SO - Food Res Int. 2022 Dec;162(Pt B):112207. doi: 10.1016/j.foodres.2022.112207. Epub 2022 Nov 19.