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Alzheimers and obesity

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https://www.readbyqxmd.com/read/29427755/high-fat-diet-treatment-impairs-hippocampal-long-term-potentiation-without-alterations-of-the-core-neuropathological-features-of-alzheimer-disease
#1
Isabel H Salas, Akila Weerasekera, Tariq Ahmed, Zsuzsanna Callaerts-Vegh, Uwe Himmelreich, Rudi D'Hooge, Detlef Balschun, Takaomi C Saido, Bart De Strooper, Carlos G Dotti
Type 2 diabetes (T2DM) and obesity might increase the risk for AD by 2-fold. Different attempts to model the effect of diet-induced diabetes on AD pathology in transgenic animal models, resulted in opposite conclusions. Here, we used a novel knock-in mouse model for AD, which, differently from other models, does not overexpress any proteins. Long-term high fat diet treatment triggers a reduction in hippocampal N-acetyl-aspartate/myo-inositol metabolites ratio and impairs long term potentiation in hippocampal acute slices...
February 7, 2018: Neurobiology of Disease
https://www.readbyqxmd.com/read/29404958/peripheral-and-central-effects-of-memantine-in-a-mixed-preclinical-mice-model-of-obesity-and-familial-alzheimer-s-disease
#2
Miren Ettcheto, Elena Sánchez-López, Yaiza Gómez-Mínguez, Henrry Cabrera, Oriol Busquets, Carlos Beas-Zarate, Maria Luisa García, Eva Carro, Gemma Casadesus, Carme Auladell, Manuel Vázquez Carrera, Jaume Folch, Antoni Camins
There is growing evidence that obesity associated with type 2 diabetes mellitus (T2DM) and aging are risk factors for the development of Alzheimer's disease (AD). However, the molecular mechanisms through which obesity interacts with β-amyloid (Aβ) to promote cognitive decline remains poorly understood. Memantine (MEM), a N-methyl-D-aspartate receptor antagonist, is currently used for the treatment of AD. Nonetheless, few studies have reported its effects on genetic preclinical models of this neurodegenerative disease exacerbated with high-fat diet (HFD)-induced obesity...
February 5, 2018: Molecular Neurobiology
https://www.readbyqxmd.com/read/29396231/abnormal-of-inter-hemispheric-functional-connectivity-in-elderly-subjects-with-overweight-obesity
#3
Xiao Luo, Kaicheng Li, Y L Jia, Qingze Zeng, Yerfan Jiaerken, Tiantian Qiu, Peiyu Huang, Xiaojun Xu, Minming Zhang
BACKGROUND: There is a growing literature documenting a variety of brain abnormalities associated with obesity. However, little is known about the effects of obesity on inter-hemispheric connectivity in aging people. METHODS: Participants included 61 cognitively intact elderly (including people with obesity, overweight, and lean controls) who underwent structural MRI, resting-state functional magnetic resonance imaging (rsfMRI) and standard neuropsychological batteries...
January 29, 2018: Obesity Research & Clinical Practice
https://www.readbyqxmd.com/read/29393643/use-of-caenorhabditis-elegans%C3%A2-to-study-the-potential-bioactivity-of-natural-compounds
#4
Vivian Hsiu-Chuan Liao
There is growing need and interest in finding specific compounds in natural products that have health benefits. Despite ongoing efforts to discover such compounds, the scientific evidence lags behind the vision, and it is important to find an effective paradigm for discovering such compounds. The model organism Caenorhabditis elegans offers a promising solution for studying the potential bioactivity and molecular mechanisms of natural compounds in vivo. This article discusses its use to study potential human health benefits with focus on anti-oxidative, anti-aging, anti-metabolic disorders (diabetes and obesity), and anti-neurodegenerative activities (Alzheimer's disease and Parkinson's disease) with practical examples...
February 2, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29377010/brain-insulin-resistance-in-type-2-diabetes-and-alzheimer-disease-concepts-and-conundrums
#5
REVIEW
Steven E Arnold, Zoe Arvanitakis, Shannon L Macauley-Rambach, Aaron M Koenig, Hoau-Yan Wang, Rexford S Ahima, Suzanne Craft, Sam Gandy, Christoph Buettner, Luke E Stoeckel, David M Holtzman, David M Nathan
Considerable overlap has been identified in the risk factors, comorbidities and putative pathophysiological mechanisms of Alzheimer disease and related dementias (ADRDs) and type 2 diabetes mellitus (T2DM), two of the most pressing epidemics of our time. Much is known about the biology of each condition, but whether T2DM and ADRDs are parallel phenomena arising from coincidental roots in ageing or synergistic diseases linked by vicious pathophysiological cycles remains unclear. Insulin resistance is a core feature of T2DM and is emerging as a potentially important feature of ADRDs...
January 29, 2018: Nature Reviews. Neurology
https://www.readbyqxmd.com/read/29339105/effects-of-thymol-on-amyloid-%C3%AE-induced-impairments-in-hippocampal-synaptic-plasticity-in-rats-fed-a-high-fat-diet
#6
Masoumeh Asadbegi, Alireza Komaki, Iraj Salehi, Parichehreh Yaghmaei, Azadeh Ebrahim-Habibi, Siamak Shahidi, Abdolrahman Sarihi, Sara Soleimani Asl, Zoleikha Golipoor
Obesity and a high-fat diet (HFD) are known to increase the incidence of Alzheimer's disease (AD). Oxidative stress, a major risk factor for AD, is increased with HFD consumption. Thymol (Thy) has antioxidant properties. Therefore, in the present study, we examined the protective and therapeutic effects of Thy on amyloid-β (Aβ)-induced impairments in the hippocampal synaptic plasticity of HFD-fed rats. In this study, 72 adult male Wistar rats were randomly assigned to 9 groups (n = 8 rats/group): Group 1 (control; standard diet); Group 2: Control + phosphate-buffered saline (PBS) + Oil (Thy vehicle); Group 3 (HFD + PBS); Group 4: (HFD + Aβ); Group 5: Control + PBS + Thy; Group 6: (HFD + Aβ + Oil); Group 7: Control + Aβ + Thy; Group 8: HFD + PBS + Thy; Group 9: (HFD + Aβ + Thy)...
January 12, 2018: Brain Research Bulletin
https://www.readbyqxmd.com/read/29338921/faster-progression-from-mci-to-probable-ad-for-carriers-of-a-single-nucleotide-polymorphism-associated-with-type-2-diabetes
#7
Hugo Girard, Olivier Potvin, Scott Nugent, Caroline Dallaire-Théroux, Stephen Cunnane, Simon Duchesne
Sporadic Alzheimer's disease (AD), as opposed to its autosomal dominant form, is likely caused by a complex interaction of genetic, environmental, and health lifestyle factors. Twin studies indicate that sporadic AD heritability could be between 58% and 79%, around half of which is explained by the ε4 allele of the apolipoprotein E (APOE4). We hypothesized that genes associated with known risk factors for AD, namely hypertension, hypercholesterolemia, obesity, diabetes, and cardiovascular disease, would contribute significantly to the remaining heritability...
December 7, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/29332042/protective-effects-of-indian-spice-curcumin-against-amyloid-%C3%AE-in-alzheimer-s-disease
#8
P Hemachandra Reddy, Maria Manczak, Xiangling Yin, Mary Catherine Grady, Andrew Mitchell, Sahil Tonk, Chandra Sekhar Kuruva, Jasvinder Singh Bhatti, Ramesh Kandimalla, Murali Vijayan, Subodh Kumar, Rui Wang, Jangampalli Adi Pradeepkiran, Gilbert Ogunmokun, Kavya Thamarai, Kandi Quesada, Annette Boles, Arubala P Reddy
The purpose of our article is to assess the current understanding of Indian spice, curcumin, against amyloid-β (Aβ)-induced toxicity in Alzheimer's disease (AD) pathogenesis. Natural products, such as ginger, curcumin, and gingko biloba have been used as diets and dietary supplements to treat human diseases, including cancer, cardiovascular, respiratory, infectious, diabetes, obesity, metabolic syndromes, and neurological disorders. Products derived from plants are known to have protective effects, including anti-inflammatory, antioxidant, anti-arthritis, pro-healing, and boosting memory cognitive functions...
2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29311632/bace1-dependent-amyloid-processing-regulates-hypothalamic-leptin-sensitivity-in-obese-mice
#9
Paul J Meakin, Susan M Jalicy, Gemma Montagut, David J P Allsop, Daniella L Cavellini, Stuart W Irvine, Christopher McGinley, Mary K Liddell, Alison D McNeilly, Karolina Parmionova, Yu-Ru Liu, Charlotte L S Bailey, J Kim Dale, Lora K Heisler, Rory J McCrimmon, Michael L J Ashford
Obesity places an enormous medical and economic burden on society. The principal driver appears to be central leptin resistance with hyperleptinemia. Accordingly, a compound that reverses or prevents leptin resistance should promote weight normalisation and improve glucose homeostasis. The protease Bace1 drives beta amyloid (Aβ) production with obesity elevating hypothalamic Bace1 activity and Aβ1-42 production. Pharmacological inhibition of Bace1 reduces body weight, improves glucose homeostasis and lowers plasma leptin in diet-induced obese (DIO) mice...
January 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29295509/endocrine-disrupting-chemicals-mediated-through-binding-androgen-receptor-are-associated-with-diabetes-mellitus
#10
REVIEW
Sugunadevi Sakkiah, Tony Wang, Wen Zou, Yuping Wang, Bohu Pan, Weida Tong, Huixiao Hong
Endocrine disrupting chemicals (EDCs) can mimic natural hormone to interact with receptors in the endocrine system and thus disrupt the functions of the endocrine system, raising concerns on the public health. In addition to disruption of the endocrine system, some EDCs have been found associated with many diseases such as breast cancer, prostate cancer, infertility, asthma, stroke, Alzheimer's disease, obesity, and diabetes mellitus. EDCs that binding androgen receptor have been reported associated with diabetes mellitus in in vitro, animal, and clinical studies...
December 23, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29279429/-developing-exercise-mimicking-drugs-toward-realization-of-preemptive-medicine-for-lifestyle-related-diseases
#11
Masato Iwabu, Toshimasa Yamauchi, Miki Okada-Iwabu, Takashi Kadowaki
Modern society is characterized by an explosion of lifestyle-related diseases that have, as their basis, obesity due to lack of exercise, which include the metabolic syndrome, diabetes, cardiovascular disease, cancer, and Alzheimer's disease. While exercise is known to be a definitive preventive or therapeutic measure against these diseases, it is clear that contemporary lifestyles tend to make exercise rather difficult to continue. Thus, there are mounting expectations worldwide for exercise-mimicking drugs that activate exercise-mediated signaling pathways...
2018: Clinical Calcium
https://www.readbyqxmd.com/read/29261338/caenorhabditis-elegans-a-convenient-in-vivo-model-for-assessing-the-impact-of-food-bioactive-components-on-obesity-aging-and-alzheimer-s-disease
#12
Peiyi Shen, Yiren Yue, Jolene Zheng, Yeonhwa Park
Caenorhabditis elegans is a small free-living nematode that lives in temperate soil environments. It has been widely employed as an animal model in research involving obesity, aging, and neurodegenerative diseases, including Alzheimer's disease, because of its various advantages, such as small size, large number of progeny production, completely sequenced genome, and short life span, over traditional animal models of vertebrates. These benefits contribute to an ideal research model organism. In this review, we provide an introduction to C...
December 20, 2017: Annual Review of Food Science and Technology
https://www.readbyqxmd.com/read/29258283/astragalus-membranaceus-polysaccharides-ameliorates-obesity-hepatic-steatosis-neuroinflammation-and-cognition-impairment-without-affecting-amyloid-deposition-in-metabolically-stressed-appswe-ps1de9-mice
#13
Yung-Cheng Huang, Huey-Jen Tsay, Mei-Kuang Lu, Chien-Hung Lin, Chih-Wen Yeh, Hui-Kang Liu, Young-Ji Shiao
Astragalus membranaceus is commonly used in traditional Chinese medicine for strengthening the host defense system. Astragalus membranaceus-polysaccharides is an effective component with various important bioactivities, such as immunomodulation, antioxidant, anti-diabetes, anti-inflammation and neuroprotection. In the present study, we determine the effects of Astragalus membranaceus-polysaccharides on metabolically stressed transgenic mice in order to develop this macromolecules for treatment of sporadic Alzheimer's disease, a neurodegenerative disease with metabolic risk factors...
December 18, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29249016/therapeutic-activity-of-plant-derived-alkaloid-conophylline-on-metabolic-syndrome-and-neurodegenerative-disease-models
#14
REVIEW
Kazuo Umezawa, Itaru Kojima, Siro Simizu, Yinzhi Lin, Hitomi Fukatsu, Naoki Koide, Yukiomi Nakade, Masashi Yoneda
Increasing metabolic syndromes including type-2 diabetes mellitus, obesity, and steatohepatitis are serious problems in most countries in the world. Neurodegenerative diseases such as Alzheimer, Parkinson's, and Huntington's diseases are increasing in many countries. However, therapy for these diseases is not sufficient yet. Thus, effective chemotherapy for these diseases is being expected. Conophylline is an alkaloid isolated from the leaves of Ervatamia microphylla and related plants. It was found to induce beta-cell differentiation in the precursor pancreatic cells...
December 16, 2017: Human Cell
https://www.readbyqxmd.com/read/29223769/obstructive-sleep-apnoea-and-alzheimer-s-disease-in-search-of-shared-pathomechanisms
#15
REVIEW
D Polsek, N Gildeh, D Cash, R Winsky-Sommerer, S C R Williams, F Turkheimer, G D Leschziner, M J Morrell, I Rosenzweig
Alzheimer's disease (AD) is a significant public health concern. The incidence continues to rise, and it is set to be over one million in the UK by 2025. The processes involved in the pathogenesis of AD have been shown to overlap with those found in cognitive decline in patients with Obstructive Sleep Apnoea (OSA). Currently, the standard treatment for OSA is Continuous Positive Airway Pressure. Adherence to treatment can, however, be an issue, especially in patients with dementia. Also, not all patients respond adequately, necessitating the use of additional treatments...
December 6, 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/29217819/association-between-serum-neuron-specific-enolase-age-overweight-and-structural-mri-patterns-in-901-subjects
#16
Johanna Hoffmann, Deborah Janowitz, Sandra Van der Auwera, Katharina Wittfeld, Matthias Nauck, Nele Friedrich, Mohamad Habes, Christos Davatzikos, Jan Terock, Martin Bahls, Annemarie Goltz, Angela Kuhla, Henry Völzke, Hans Jörgen Grabe
Serum neuron-specific enolase (sNSE) is considered a marker for neuronal damage, related to gray matter structures. Previous studies indicated its potential as marker for structural and functional damage in conditions with adverse effects to the brain like obesity and dementia. In the present study, we investigated the putative association between sNSE levels, body mass index (BMI), total gray matter volume (GMV), and magnetic resonance imaging-based indices of aging as well as Alzheimer's disease (AD)-like patterns...
December 8, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/29215310/apolipoprotein-e4-mediates-insulin-resistance-associated-cerebrovascular-dysfunction-and-the-post-prandial-response
#17
Lance A Johnson, Eileen Ruth Torres, Sydney Weber Boutros, Esha Patel, Tunde Akinyeke, Nabil J Alkayed, Jacob Raber
Metabolic dysfunction, commonly a result of diets high in saturated fats and sugar, is associated with impaired cognitive function and an increased risk of age-related cognitive decline (ACD) and Alzheimer's disease (AD). Compared to the E3 isoform of apolipoprotein (apoE), the E4 isoform is a major genetic risk factor for ACD, AD, and for developing cognitive impairments following various environmental challenges, including dietary challenges such as a high-fat diet (HFD). Both insulin resistance (IR) and E4 are associated with metabolic and vascular impairments...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/29164610/shared-pathological-pathways-of-alzheimer-s-disease-with-specific-comorbidities-current-perspectives-and-interventions
#18
REVIEW
Christiane M Nday, Despoina Eleftheriadou, Graham Jackson
Alzheimer's disease (AD) belongs to one of the most multifactorial, complex and heterogeneous morbidity-leading disorders. Despite the extensive research in the field, AD pathogenesis is still at some extend obscure. Mechanisms linking AD with certain comorbidities, namely diabetes mellitus, obesity and dyslipidemia, are increasingly gaining importance, mainly because of their potential role in promoting AD development and exacerbation. Their exact cognitive impairment trajectories, however, remain to be fully elucidated...
November 21, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/29164373/the-possible-factors-affecting-microglial-activation-in-cases-of-obesity-with-cognitive-dysfunction
#19
REVIEW
Titikorn Chunchai, Nipon Chattipakorn, Siriporn C Chattipakorn
Obesity has reached epidemic proportions in many countries around the world. Several studies have reported that obesity can lead to the development of cognitive decline. There is increasing evidence to demonstrate that microglia play a crucial role in cognitive decline in cases of obesity, Alzheimer's disease and also in the aging process. Although there have been several studies into microglia over the past decades, the mechanistic link between microglia and cognitive decline in obese models is still not fully understood...
November 21, 2017: Metabolic Brain Disease
https://www.readbyqxmd.com/read/29163489/ameliorating-amyloid-%C3%AE-fibrils-triggered-inflammation-via-curcumin-loaded-polymeric-nanoconstructs
#20
Andrea Ameruoso, Roberto Palomba, Anna Lisa Palange, Antonio Cervadoro, Aeju Lee, Daniele Di Mascolo, Paolo Decuzzi
Inflammation is a common hallmark in several diseases, including atherosclerosis, cancer, obesity, and neurodegeneration. In Alzheimer's disease (AD), growing evidence directly correlates neuronal damage with inflammation of myeloid brain cells, such as microglia. Here, polymeric nanoparticles were engineered and characterized for the delivery of anti-inflammatory molecules to macrophages stimulated via direct incubation with amyloid-β fibers. 200 nm spherical polymeric nanoconstructs (SPNs) and 1,000 nm discoidal polymeric nanoconstructs (DPNs) were synthesized using poly(lactic-co-glycolic acid) (PLGA), polyethylene glycol (PEG), and lipid chains as building blocks...
2017: Frontiers in Immunology
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