Abstract
Background
Alzheimer’s disease (AD) and type 2 diabetes, two diseases that contribute considerable morbidity and mortality in middle-age and elderly people, coexist and progress in parallel, leading to the presumption that one may cause the other. However, a causative link has not yet been established.
Methods
This study used non-diabetic and diabetic rats injected with β-amyloid (25-35) into the CA1 of the hippocampus to induce AD like plaques as a model of early-stage AD to evaluate the effects of AD on energy metabolism. AD like cognitive dysfunction was confirmed using passive avoidance tests and Morris water maze tests.
Results
Diabetic and non-diabetic rats with experimental AD exhibited memory deficits by β-amyloid (25-35) accumulation in the hippocampus, but diabetes exacerbated memory impairment. All rats, diabetic and non-diabetic, infused with β-amyloid had profound decreases in energy intake, activity and fat oxidation and increased carbohydrate oxidation and energy expenditure. Energy expenditure was increased by 8–10 % and energy intake decreased by approximately 20 % in the rats injected with β-amyloid regardless of diabetic status.
Conclusions
These results suggest that AD type plaques in the brain may induce metabolic disturbances and cachexia in early AD, which may be an early warning sign of AD in humans.
References
Ravona-Springer R, Moshier E, Schmeidler J, Godbold J, Akrivos J, Rapp M, Grossman HT, Wysocki M, Silverman JM, Haroutunian V, Beeri MS (2012) Changes in glycemic control are associated with cognition in non-diabetic elderly. J Alzheimers Dis 30:299–309
Zhang Y, Zhou B, Deng B, Zhang F, Wu J, Wang Y, Le Y, Zhai Q (2013) Amyloid-β induces hepatic insulin resistance in vivo via JAK2. Diabetes 62:1159–1166
Frisardi V, Solfrizzi V, Seripa D, Capurso C, Santamato A, Sancarlo A, Vendemiale G, Pilotto A, Panza F (2010) Metabolic-cognitive syndrome: a cross-talk between metabolic syndrome and Alzheimer’s disease. Ageing Res Rev 9:399–417
Pintana H, Apaijai N, Pratchayasakul W, Chattipakorn N, Chattipakorn SC (2012) Effects of metformin learning and memory behaviors and brain mitochondrial functions in high fat diet induced insulin resistant rats. Life Sci 91:409–414
Siervo M, Arnold R, Wells JC, Tagliabue A, Colantuoni A, Albanese E, Brayne C, Stephan BC (2011) Intentional weight loss in overweight and obese individuals and cognitive function. Obes Rev 12:968–983
Siervo M, Nasti G, Stephan BC, Papa A, Muscariello E, Well JC, Prado CM, Colantuoni A (2012) Effects of intentional weight loss on physical and cognitive function in middle-aged and older obese participants: a pilot study. J Am Coll Nutr 31:79–86
Power BD, Alfonso H, Flicker L, Hankey GJ, Yeap BB, Almeida OP (2012) Changes in body mass in later life and incident dementia. Int Psychogeriatr 14:1–12
Johnson DK, Wilkins CH, Morris JC (2006) Accelerated weight loss may precede the diagnosis in Alzheimer disease. Arch Neurol 63:1312–1317
Zhang HT, Zhao Y, Huang Y, Dorairaj NR, Chandler LJ, O’Donnell JM (2004) Inhibition of the phosphodiesterase 4 (PDE4) enzyme reverses memory deficits produced by infusion of the MEK inhibitor U0126 into the CA1 subregion of the rat hippocampus. Neuropsychopharmacology 29:1432–1439
Maesako M, Uemura K, Kubota M, Kuzuya A, Sasaki K, Hayashida N, Asada-Utsugi M, Watanabe K, Uemura M, Kihara T, Takahashi R, Shimohama S, Kinoshita A (2012) Exercise is more effective than diet control in preventing high fat diet-induced β-amyloid deposition and memory deficit in amyloid precursor protein transgenic mice. J Biol Chem 287:23024–23033
Committee of the American Institute of Nutrition (1977) Ad hoc committee on standards for nutritional studies. J Nutr 107:1340–1348
Hosokawa YA, Hosokawa H, Chen C, Leahy JL (1996) Mechanism of impaired glucose-potentiated insulin secretion in diabetic 90 % pancreatectomy rats. Study using glucagons like peptide-1 (7-37). J Clin Invest 97:180–186
Niwa H, Ogawa Y, Kido Y, Abe Y, Kobayashi M, Mori T, Tanaka T (1989) The rate of lipid oxidation in septic rat models. Jpn J Surg 19:439–445
Lusk G (1924) Analysis of the oxidation of mixtures of carbohydrate and fat. J Biol Chem 59:41
Labayen I, Forga L, Martinez JA (1999) Nutrient oxidation and metabolic rate as affected by meals containing different proportions of carbohydrate and fat, in healthy young women. Eur J Nutr 38:158–166
Zussy C, Brureau A, Delair B, Marchal S, Keller E, Ixart G, Naert G, Meunier J, Chevallier N, Maurice T, Givalois L (2011) Time-course and regional analyses of the physiopathological changes induced after cerebral injection of an amyloid β fragment in rats. Am J Pathol 179:315–334
Park S, da Kim S, Kang S, Daily JW 3rd (2011) A ketogenic diet impairs energy and glucose homeostasis by the attenuation of hypothalamic leptin signaling and hepatic insulin signaling in a rat model of non-obese type 2 diabetes. Exp Biol Med 236:195–204
Yang HJ, Hwang JT, Kwon DY, Kim MJ, Kang S, Moon NR, Park S (2013) Yuzu extract prevents cognitive decline and impaired glucose homeostasis in β-amyloid-infused rats. J Nutr 143(7):1093–1099
Grossberg AJ, Scarlett JM, Marks SL (2010) Hypothalamic mechanisms in cachexia. Physiol Behav 100:478–489
Steen E, Terry BM, Rivera EJ, Cannon JL, Neely TR, Tavares R, Xu XJ, Wands JR, de la Monte SM (2005) Impaired insulin and insulin-like growth factor expression and signaling mechanisms in Alzheimer’s disease—is this type 3 diabetes? J Alzheimer’s Dis 7:63–80
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We acknowledge funding from Hoseo University.
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James, D., Kang, S. & Park, S. Injection of β-amyloid into the hippocampus induces metabolic disturbances and involuntary weight loss which may be early indicators of Alzheimer’s disease. Aging Clin Exp Res 26, 93–98 (2014). https://doi.org/10.1007/s40520-013-0181-z
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DOI: https://doi.org/10.1007/s40520-013-0181-z