Regulating Energy Balance: Uncovering the Involvement of Neurotrophins

A special issue of Life (ISSN 2075-1729). This special issue belongs to the section "Cell Biology and Tissue Engineering".

Deadline for manuscript submissions: closed (30 June 2022) | Viewed by 14838

Special Issue Editors


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Institute of Crystallography (IC), National Council of Research (CNR), Via Paolo Gaifami 18, 95126 Catania, Italy
Interests: apoptosis; mitochondria; neurodegeneration; oxidative stress; fluorescence microscopy; flow cytometry; single cell imaging; signalling.

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Guest Editor
Department of Biomedical and Biotechnological Sciences, Division of Medical Biochemistry, University of Catania, Via Santa Sofia 87, 95125 Catania, Italy
Interests: neurodegenerative acute (traumatic brain injury) and chronic (multiple sclerosis) disorders; oxidative and nitrosative stresses; oxidation mechanisms
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Guest Editor
Institute of Crystallography (IC), National Council of Research (CNR), Via Paolo Gaifami 18, 95126 Catania, Italy
Interests: neurodegenerative diseases; oxidative stress; bioactive small molecules; molecular recognition; proteinophaties; fluorescence spectroscopy

Special Issue Information

Dear Colleagues,

Neurotrophic factors or neurotrophins (NTs) are a class of signaling molecules that regulate a multitude of aspects of neuronal biology, including cell proliferation, differentiation, and survival in both developing and mature CNS. By binding Trk receptors, NTs regulate neural circuitry, such as vesicle recycling, neurotransmitter synthesis and axoplasmic transport, and many other neuronal functions which contribute to the elevated metabolic rate registered in the CNS. Therefore, it is not surprising that NTs are involved in the regulation of energy balance. NTs work together to provide an adaptive response to fluctuations in energy intake and expenditure, connecting the central nervous system with peripheral tissues, including muscle, liver, and the adipose tissue in a complex operational network. By finely tuning intracellular signals, they influence many mitochondrial functions, affecting the cellular metabolism. Recognized as the powerhouses of cells, mitochondria are dynamic organelles that integrate cell physiology, signaling pathways, and metabolism. However, currently, the complex mechanisms and pathways used by NTs to influence mitochondria are yet to be covered.

Notably, the pathological features of various age-related neurodegenerative diseases, such as the disruption of mitochondrial functionality and the dysregulation of metabolic genes, highlight the importance of understanding the NTs’ mitochondria connections, as these can be exploited as potential key sites for the development of novel therapeutical approaches.

This Special Issue of Life will collect original research articles as well as reviews dealing with the mechanisms by which NTs are involved in the regulation of energy expenditure. The article collection will also include papers describing unidentified mechanisms and signaling pathways by which NTs control the mitochondrial function and dynamics, including signal transduction, gene expression, cell proliferation, cell death, and cell-to-cell interactions using different experimental models. We also encourage submissions that highlight outstanding technical challenges and discuss more recent attempts to harness the neuroprotective capacity of endogenous NTs and to sustain the mitochondrial function using small molecules.

Dr. Marianna Flora Tomasello
Prof. Dr. Angela Maria Amorini
Dr. Francesco Attanasio
Guest Editors

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Keywords

  • neurotrophins
  • mitochondria
  • metabolism
  • bioenergetics
  • cell biology
  • neurobiology

Published Papers (4 papers)

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Review

22 pages, 396 KiB  
Review
The Roles of Neurotrophins in Traumatic Brain Injury
by Ping-Hung Lin, Lu-Ting Kuo and Hui-Tzung Luh
Life 2022, 12(1), 26; https://doi.org/10.3390/life12010026 - 24 Dec 2021
Cited by 15 | Viewed by 3117
Abstract
Neurotrophins are a collection of structurally and functionally related proteins. They play important roles in many aspects of neural development, survival, and plasticity. Traumatic brain injury (TBI) leads to different levels of central nervous tissue destruction and cellular repair through various compensatory mechanisms [...] Read more.
Neurotrophins are a collection of structurally and functionally related proteins. They play important roles in many aspects of neural development, survival, and plasticity. Traumatic brain injury (TBI) leads to different levels of central nervous tissue destruction and cellular repair through various compensatory mechanisms promoted by the injured brain. Many studies have shown that neurotrophins are key modulators of neuroinflammation, apoptosis, blood–brain barrier permeability, memory capacity, and neurite regeneration. The expression of neurotrophins following TBI is affected by the severity of injury, genetic polymorphism, and different post-traumatic time points. Emerging research is focused on the potential therapeutic applications of neurotrophins in managing TBI. We conducted a comprehensive review by organizing the studies that demonstrate the role of neurotrophins in the management of TBI. Full article
15 pages, 1016 KiB  
Review
Role of Mitochondria in Interplay between NGF/TRKA, miR-145 and Possible Therapeutic Strategies for Epithelial Ovarian Cancer
by Daniela B. Vera, Allison N. Fredes, Maritza P. Garrido and Carmen Romero
Life 2022, 12(1), 8; https://doi.org/10.3390/life12010008 - 21 Dec 2021
Cited by 3 | Viewed by 3373
Abstract
Ovarian cancer is the most lethal gynecological neoplasm, and epithelial ovarian cancer (EOC) accounts for 90% of ovarian malignancies. The 5-year survival is less than 45%, and, unlike other types of cancer, the proportion of women who die from this disease has not [...] Read more.
Ovarian cancer is the most lethal gynecological neoplasm, and epithelial ovarian cancer (EOC) accounts for 90% of ovarian malignancies. The 5-year survival is less than 45%, and, unlike other types of cancer, the proportion of women who die from this disease has not improved in recent decades. Nerve growth factor (NGF) and tropomyosin kinase A (TRKA), its high-affinity receptor, play a crucial role in pathogenesis through cell proliferation, angiogenesis, invasion, and migration. NGF/TRKA increase their expression during the progression of EOC by upregulation of oncogenic proteins as vascular endothelial growth factor (VEGF) and c-Myc. Otherwise, the expression of most oncoproteins is regulated by microRNAs (miRs). Our laboratory group reported that the tumoral effect of NGF/TRKA depends on the regulation of miR-145 levels in EOC. Currently, mitochondria have been proposed as new therapeutic targets to activate the apoptotic pathway in the cancer cell. The mitochondria are involved in a myriad of functions as energy production, redox control, homeostasis of Ca+2, and cell death. We demonstrated that NGF stimulation produces an augment in the Bcl-2/BAX ratio, which supports the anti-apoptotic effects of NGF in EOC cells. The review aimed to discuss the role of mitochondria in the interplay between NGF/TRKA and miR-145 and possible therapeutic strategies that may decrease mortality due to EOC. Full article
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22 pages, 1427 KiB  
Review
The Pleiotropic Potential of BDNF beyond Neurons: Implication for a Healthy Mind in a Healthy Body
by Maria Carmela Di Rosa, Stefania Zimbone, Miriam Wissam Saab and Marianna Flora Tomasello
Life 2021, 11(11), 1256; https://doi.org/10.3390/life11111256 - 17 Nov 2021
Cited by 18 | Viewed by 3274
Abstract
Brain-derived neurotrophic factor (BDNF) represents one of the most widely studied neurotrophins because of the many mechanisms in which it is involved. Among these, a growing body of evidence indicates BDNF as a pleiotropic signaling molecule and unveils non-negligible implications in the regulation [...] Read more.
Brain-derived neurotrophic factor (BDNF) represents one of the most widely studied neurotrophins because of the many mechanisms in which it is involved. Among these, a growing body of evidence indicates BDNF as a pleiotropic signaling molecule and unveils non-negligible implications in the regulation of energy balance. BDNF and its receptor are extensively expressed in the hypothalamus, regions where peripheral signals, associated with feeding control and metabolism activation, and are integrated to elaborate anorexigenic and orexigenic effects. Thus, BDNF coordinates adaptive responses to fluctuations in energy intake and expenditure, connecting the central nervous system with peripheral tissues, including muscle, liver, and the adipose tissue in a complex operational network. This review discusses the latest literature dealing with the involvement of BDNF in the maintenance of energy balance. We have focused on the physiological and molecular mechanisms by which BDNF: (I) controls the mitochondrial function and dynamics; (II) influences thermogenesis and tissue differentiation; (III) mediates the effects of exercise on cognitive functions; and (IV) modulates insulin sensitivity and glucose transport at the cellular level. Deepening the understanding of the mechanisms exploited to maintain energy homeostasis will lay the groundwork for the development of novel therapeutical approaches to help people to maintain a healthy mind in a healthy body. Full article
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12 pages, 710 KiB  
Review
The Emerging Role of BDNF/TrkB Signaling in Cardiovascular Diseases
by Peng-Zhou Hang, Hua Zhu, Pei-Feng Li, Jie Liu, Feng-Qin Ge, Jing Zhao and Zhi-Min Du
Life 2021, 11(1), 70; https://doi.org/10.3390/life11010070 - 19 Jan 2021
Cited by 25 | Viewed by 3747
Abstract
Brain-derived neurotrophic factor (BDNF) is one of the most abundant neurotrophins in the central nervous system. Numerous studies suggest that BDNF has extensive roles by binding to its specific receptor, tropomyosin-related kinase receptor B (TrkB), and thereby triggering downstream signaling pathways. Recently, growing [...] Read more.
Brain-derived neurotrophic factor (BDNF) is one of the most abundant neurotrophins in the central nervous system. Numerous studies suggest that BDNF has extensive roles by binding to its specific receptor, tropomyosin-related kinase receptor B (TrkB), and thereby triggering downstream signaling pathways. Recently, growing evidence highlights that the BDNF/TrkB pathway is expressed in the cardiovascular system and closely associated with the development and outcome of cardiovascular diseases (CVD), including coronary artery disease, heart failure, cardiomyopathy, hypertension, and metabolic diseases. Furthermore, circulating BDNF has also been revealed as a new potential biomarker for both diagnosis and prognosis of CVD. In this review, we discuss the current evidence of the emerging role of BDNF/TrkB signaling and address the challenges that remain in translating these discoveries to novel therapeutic strategies for CVD. Full article
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