scholarly journals The Contribution of Astrocyte Autophagy to Systemic Metabolism

2020 ◽  
Vol 21 (7) ◽  
pp. 2479
Author(s):  
Ana Ortiz-Rodriguez ◽  
Maria-Angeles Arevalo
Keyword(s):  
Saturated Fatty Acids ◽  
Brain Inflammation ◽  
Central Regulation ◽  
Feeding Response ◽  
Regulation Of Metabolism ◽  
Body Energy ◽  
Metabolic Regulators ◽  
Brain Homeostasis

Autophagy is an essential mechanism to maintain cellular homeostasis. Besides its role in controlling the quality of cytoplasmic components, it participates in nutrient obtaining and lipid mobilization under stressful conditions. Furthermore, autophagy is involved in the regulation of systemic metabolism as its blockade in hypothalamic neurons can affect the central regulation of metabolism and impact body energy balance. Moreover, hypothalamic autophagy can be altered during obesity, one of the main alterations of metabolism nowadays. In this review, we focus on the role of astrocytes, essential cells for brain homeostasis, which represent key metabolic regulators. Astrocytes can sense metabolic signals in the hypothalamus and modulate systemic functions as glucose homeostasis and feeding response. Moreover, the response of astrocytes to obesity has been widely studied. Astrocytes are important mediators of brain inflammation and can be affected by increased levels of saturated fatty acids associated with obesity. Although autophagy plays important roles for astrocyte homeostasis and functioning, the contribution of astrocyte autophagy to systemic metabolism has not been analyzed yet. Furthermore, how obesity can impact astrocyte autophagy is poorly understood. More studies are needed in order to understand the contribution of astrocyte autophagy to metabolism.

scholarly journals Autophagy in Astrocytes: Importance for Metabolism

2020 ◽  
Author(s):  
Ana Ortiz-Rodriguez ◽  
Maria-Angeles Arevalo
Keyword(s):  
Arcuate Nucleus ◽  
Saturated Fatty Acids ◽  
Brain Inflammation ◽  
Central Regulation ◽  
Neuronal Populations ◽  
Regulation Of Metabolism ◽  
Body Energy ◽  
Metabolic Regulators ◽  
Brain Homeostasis

Autophagy is an essential mechanism to maintain cellular homeostasis. Besides its role in controlling the quality of cytoplasmic components, it participates in nutrient obtaining and lipid mobilization under stressful conditions. Furthermore, autophagy is involved in the regulation of systemic metabolic, a function mainly performed by neuronal populations of the arcuate nucleus of the hypothalamus. Several studies have shown that blockade of autophagy in these neurons can affect central regulation of metabolism and impact body energy balance. Moreover, hypothalamic autophagy can be altered during obesity. However, neurons are not the only cell type involved in the central regulation of metabolism. Astrocytes, essential cells for brain homeostasis, are key metabolic regulators. They can sense metabolic signals in the hypothalamus and modulate systemic functions as glucose homeostasis and feeding response. Moreover, the response of astrocytes to obesity has been widely studied. Astrocytes are important mediators of brain inflammation and can be affected by increased levels of saturated fatty acids associated to obesity. Although autophagy plays important roles for astrocyte homeostasis and functioning, the contribution of astrocyte autophagy to systemic metabolism has not been analysed. Furthermore, how obesity can impact astrocyte autophagy is poorly understood. More studies are needed in other to understand the contribution of astrocyte autophagy to metabolism.

scholarly journals Metabolic Regulation of Hypoxia-Inducible Factors in Hypothalamus

2021 ◽  
Vol 12 ◽  
Author(s):  
Dan Du ◽  
Yugang Zhang ◽  
Canjun Zhu ◽  
Hong Chen ◽  
Jia Sun
Keyword(s):  
Metabolic Regulation ◽  
Molecular Mechanisms ◽  
Hypoxia Inducible Factor ◽  
Central Regulation ◽  
Hypoxic Conditions ◽  
Regulation Of Metabolism ◽  
Single Effect ◽  
Single Part ◽  
Main Influence

The earliest hypoxia-inducible factor (HIF) function was to respond to hypoxia or hypoxic conditions as a transcription factor. Recent studies have expanded our understanding of HIF, and a large amount of evidence indicates that HIF has an essential effect on central regulation of metabolism. The central nervous system’s response to glucose, inflammation, and hormones’ main influence on systemic metabolism are all regulated by HIF to varying degrees. In the hypothalamus, HIF mostly plays a role in inhibiting energy uptake and promoting energy expenditure, which depends not only on the single effect of HIF or a single part of the hypothalamus. In this paper, we summarize the recent progress in the central regulation of metabolism, describe in detail the role of HIF in various functions of the hypothalamus and related molecular mechanisms, and reveal that HIF is deeply involved in hypothalamic-mediated metabolic regulation.

scholarly journals Role of Descending Dopaminergic Pathways in Pain Modulation

2019 ◽  
Vol 17 (12) ◽  
pp. 1176-1182 ◽  
Author(s):  
Changsheng Li ◽  
Sufang Liu ◽  
Xihua Lu ◽  
Feng Tao
Keyword(s):  
Chronic Pain ◽  
Well Being ◽  
Pain Modulation ◽  
Central Regulation ◽  
Dopaminergic Systems ◽  
Different Types ◽  
Dopaminergic Pathways ◽  
The Brain

Pain, especially when chronic, is a common reason patients seek medical care and it affects the quality of life and well-being of the patients. Unfortunately, currently available therapies for chronic pain are often inadequate because the neurobiological basis of such pain is still not fully understood. Although dopamine has been known as a neurotransmitter to mediate reward and motivation, accumulating evidence has shown that dopamine systems in the brain are also involved in the central regulation of chronic pain. Most importantly, descending dopaminergic pathways play an important role in pain modulation. In this review, we discuss dopamine receptors, dopaminergic systems in the brain, and the role of descending dopaminergic pathways in the modulation of different types of pain.

scholarly journals Dietary Polyphenol Supplementation in Food Producing Animals: Effects on the Quality of Derived Products

Animals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 401
Author(s):  
Valentina Serra ◽  
Giancarlo Salvatori ◽  
Grazia Pastorelli
Keyword(s):  
Dairy Products ◽  
Animal Feed ◽  
Saturated Fatty Acids ◽  
Meat Products ◽  
Natural Antioxidants ◽  
Alternative Source ◽  
Animal Products ◽  
Milk And Dairy Products

The growing interest in producing healthier animal products with a higher ratio of polyunsaturated to saturated fatty acids, is associated with an increase in lipoperoxidation. For this reason, it is essential to attenuate oxidative deterioration in the derived products. Natural antioxidants such as polyphenols represent a good candidate in this respect. The first part of the review highlights the occurrence, bioavailability, and the role of polyphenols in food-producing animals that, especially in intensive systems, are exposed to stressful situations in which oxidation plays a crucial role. The second part offers an overview of the effects of polyphenols either supplemented to the diet of monogastric and ruminants or added directly to meat and dairy products on the physicochemical and sensorial properties of the product. From this review emerges that polyphenols play an important, though not always clear, role in the quality of meat and meat products, milk and dairy products. It cannot be ruled out that different compounds or amounts of polyphenols may lead to different results. However, the inclusion of agro-industrial by-products rich in polyphenols, in animal feed, represents an innovative and alternative source of antioxidants as well as being useful in reducing environmental and economic impact.

SUMO, hypoxia and the regulation of metabolism

2008 ◽  
Vol 36 (3) ◽  
pp. 445-448 ◽  
Author(s):  
Terence A. Agbor ◽  
Cormac T. Taylor
Keyword(s):  
Cellular Response ◽  
Protein Modification ◽  
Critical Role ◽  
Critical Event ◽  
Post Translational Modification ◽  
Dynamic Regulation ◽  
Regulation Of Metabolism ◽  
Metabolic Challenge ◽  
Metabolic Regulators

Post-translational modification is a critical event in the dynamic regulation of protein stability, location, structure, function, activity and interaction with other proteins and as such plays an important role in organism complexity. Over the last 10 years, the extensive and critical role of one such protein modification by SUMO (small ubiquitin-related modifier) has become apparent. The focus of this mini-review will be on recent reports of a possible functional role for the SUMO pathway in the adaptive cellular response to metabolic challenge, such as oxygen deprivation (hypoxia). Here, we will briefly review the evolving evidence for this pathway in the regulation of a number of metabolic regulators and discuss a possible role for SUMOylation in the regulation of basic metabolic function.

Cognitive Health Counseling 40+

2013 ◽  
Vol 21 (1) ◽  
pp. 24-33 ◽  
Author(s):  
Anne Eschen ◽  
Franzisca Zehnder ◽  
Mike Martin
Keyword(s):  
Outcome Variable ◽  
Pilot Phase ◽  
Subjective Memory ◽  
Cognitive Health ◽  
Health Counseling ◽  
Agents Of Change ◽  
Main Outcome Variable ◽  
Further Development

This article introduces Cognitive Health Counseling 40+ (CH.CO40+), an individualized intervention that is conceptually based on the orchestration model of quality-of-life management ( Martin & Kliegel, 2010 ) and aims at improving satisfaction with cognitive health in adults aged 40 years and older. We describe the theoretically deduced characteristics of CH.CO40+, its target group, its multifactorial nature, its individualization, the application of subjective and objective measures, the role of participants as agents of change, and the rationale for choosing participants’ satisfaction with their cognitive health as main outcome variable. A pilot phase with 15 middle-aged and six older adults suggests that CH.CO40+ attracts, and may be particularly suitable for, subjective memory complainers. Implications of the pilot data for the further development of the intervention are discussed.

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