scholarly journals Involvements of Hyperhomocysteinemia in Neurological Disorders

Metabolites ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 37
Author(s):  
Marika Cordaro ◽  
Rosalba Siracusa ◽  
Roberta Fusco ◽  
Salvatore Cuzzocrea ◽  
Rosanna Di Paola ◽  
...  
Keyword(s):  
Tau Protein ◽  
Neurological Disorders ◽  
Calcium Influx ◽  
Pathological Condition ◽  
Brain Disorders ◽  
Redox Potentials ◽  
Arterial Damage ◽  
The Relationship ◽  
Definite Limit

Homocysteine (HCY), a physiological amino acid formed when proteins break down, leads to a pathological condition called hyperhomocysteinemia (HHCY), when it is over a definite limit. It is well known that an increase in HCY levels in blood, can contribute to arterial damage and several cardiovascular disease, but the knowledge about the relationship between HCY and brain disorders is very poor. Recent studies demonstrated that an alteration in HCY metabolism or a deficiency in folate or vitamin B12 can cause altered methylation and/or redox potentials, that leads to a modification on calcium influx in cells, or into an accumulation in amyloid and/or tau protein involving a cascade of events that culminate in apoptosis, and, in the worst conditions, neuronal death. The present review will thus summarize how much is known about the possible role of HHCY in neurodegenerative disease.

scholarly journals Roles of N-Methyl-D-Aspartate Receptors (NMDARs) in Epilepsy

2022 ◽  
Vol 14 ◽  
Author(s):  
Shuang Chen ◽  
Da Xu ◽  
Liu Fan ◽  
Zhi Fang ◽  
Xiufeng Wang ◽  
...  
Keyword(s):  
Synaptic Plasticity ◽  
Glutamate Receptors ◽  
Neurological Disorders ◽  
Nerve Conduction ◽  
Ionotropic Glutamate Receptors ◽  
Future Studies ◽  
Excitatory Neurotransmission ◽  
The Relationship ◽  
Neuron Injury

Epilepsy is one of the most common neurological disorders characterized by recurrent seizures. The mechanism of epilepsy remains unclear and previous studies suggest that N-methyl-D-aspartate receptors (NMDARs) play an important role in abnormal discharges, nerve conduction, neuron injury and inflammation, thereby they may participate in epileptogenesis. NMDARs belong to a family of ionotropic glutamate receptors that play essential roles in excitatory neurotransmission and synaptic plasticity in the mammalian CNS. Despite numerous studies focusing on the role of NMDAR in epilepsy, the relationship appeared to be elusive. In this article, we reviewed the regulation of NMDAR and possible mechanisms of NMDAR in epilepsy and in respect of onset, development, and treatment, trying to provide more evidence for future studies.

scholarly journals The gut-microbiota-brain axis in autism: what Drosophila models can offer?

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Safa Salim ◽  
Ayesha Banu ◽  
Amira Alwa ◽  
Swetha B. M. Gowda ◽  
Farhan Mohammad
Keyword(s):  
Gut Microbiota ◽  
Gut Microbiome ◽  
Neurological Disorders ◽  
Autism Spectrum ◽  
Brain Disorders ◽  
Mediated Communication ◽  
The Impact ◽  
Insight Into ◽  
Drosophila Models

AbstractThe idea that alterations in gut-microbiome-brain axis (GUMBA)-mediated communication play a crucial role in human brain disorders like autism remains a topic of intensive research in various labs. Gastrointestinal issues are a common comorbidity in patients with autism spectrum disorder (ASD). Although gut microbiome and microbial metabolites have been implicated in the etiology of ASD, the underlying molecular mechanism remains largely unknown. In this review, we have summarized recent findings in human and animal models highlighting the role of the gut-brain axis in ASD. We have discussed genetic and neurobehavioral characteristics of Drosophila as an animal model to study the role of GUMBA in ASD. The utility of Drosophila fruit flies as an amenable genetic tool, combined with axenic and gnotobiotic approaches, and availability of transgenic flies may reveal mechanistic insight into gut-microbiota-brain interactions and the impact of its alteration on behaviors relevant to neurological disorders like ASD.

scholarly journals Metallothionein in Brain Disorders

2017 ◽  
Vol 2017 ◽  
pp. 1-12 ◽  
Author(s):  
Daniel Juárez-Rebollar ◽  
Camilo Rios ◽  
Concepción Nava-Ruíz ◽  
Marisela Méndez-Armenta
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Neurodegenerative Diseases ◽  
Neurological Disorders ◽  
Regulation Of Gene Expression ◽  
Main Function ◽  
Brain Disorders ◽  
Essential Metals ◽  
The Central Nervous System

Metallothioneins are a family of proteins which are able to bind metals intracellularly, so their main function is to regulate the cellular metabolism of essential metals. There are 4 major isoforms of MTs (I–IV), three of which have been localized in the central nervous system. MT-I and MT-II have been localized in the spinal cord and brain, mainly in astrocytes, whereas MT-III has been found mainly in neurons. MT-I and MT-II have been considered polyvalent proteins whose main function is to maintain cellular homeostasis of essential metals such as zinc and copper, but other functions have also been considered: detoxification of heavy metals, regulation of gene expression, processes of inflammation, and protection against free radicals generated by oxidative stress. On the other hand, the MT-III has been related in events of pathogenesis of neurodegenerative diseases such as Parkinson and Alzheimer. Likewise, the participation of MTs in other neurological disorders has also been reported. This review shows recent evidence about the role of MT in the central nervous system and its possible role in neurodegenerative diseases as well as in brain disorders.

scholarly journals Glycogen Synthase Kinase 3: A Point of Integration in Alzheimer's Disease and a Therapeutic Target?

2012 ◽  
Vol 2012 ◽  
pp. 1-4 ◽  
Author(s):  
Siddhartha Mondragón-Rodríguez ◽  
George Perry ◽  
Xiongwei Zhu ◽  
Paula I. Moreira ◽  
Sylvain Williams
Keyword(s):  
Synaptic Plasticity ◽  
Neurological Disorders ◽  
Glycogen Synthase ◽  
Physiological Role ◽  
Glycogen Synthase Kinase ◽  
Glycogen Synthase Kinase 3 ◽  
Current Therapies ◽  
Relationship Of ◽  
The Relationship

Glycogen synthase kinase 3 (GSK3) has been implicated in neurological disorders; therefore, it is not surprising that there has been an increased focus towards developing therapies directed to this kinase. Unfortunately, these current therapies have not taken into consideration the physiological role of GSK3 in crucial events like synaptic plasticity. With this in mind we will discuss the relationship of synaptic plasticity with GSK3 and tau protein and their role as potential targets for the development of therapeutic strategies. Finally, we will provide perspectives in developing a cocktail therapy for Alzheimer's treatment.

Role of Tau Protein in Both Physiological and Pathological Conditions

2004 ◽  
Vol 84 (2) ◽  
pp. 361-384 ◽  
Author(s):  
JESÚS AVILA ◽  
JOSÉ J. LUCAS ◽  
MAR PÉREZ ◽  
FÉLIX HERNÁNDEZ
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Tau Protein ◽  
Neurological Disorders ◽  
Strong Influence ◽  
Physiological Conditions ◽  
Pathological Conditions

Avila, Jesús, José J. Lucas, Mar Pérez, and Félix Hernández. Role of Tau Protein in Both Physiological and Pathological Conditions. Physiol Rev 84: 361–384, 2004; 10.1152/physrev.00024.2003.—The morphology of a neuron is determined by its cytoskeletal scaffolding. Thus proteins that associate with the principal cytoskeletal compo-nents such as the microtubules have a strong influence on both the morphology and physiology of neurons. Tau is a microtubule-associated protein that stabilizes neuronal microtubules under normal physiological conditions. However, in certain pathological situations, tau protein may undergo modifications, mainly through phosphorylation, that can result in the generation of aberrant aggregates that are toxic to neurons. This process occurs in a number of neurological disorders collectively known as tauopathies, the most commonly recognized of which is Alzheimer's disease. The purpose of this review is to define the role of tau protein under normal physiological conditions and to highlight the role of the protein in different tauopathies.

scholarly journals The multifaceted role of vitamin B 6 in cancer: Drosophila as a model system to investigate DNA damage

Open Biology ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 200034 ◽  
Author(s):  
Roberto Contestabile ◽  
Martino Luigi di Salvo ◽  
Victoria Bunik ◽  
Angela Tramonti ◽  
Fiammetta Vernì
Keyword(s):  
Dna Damage ◽  
Neurological Disorders ◽  
Methylation Pattern ◽  
Model System ◽  
Genome Integrity ◽  
Model Organisms ◽  
Vitamin B ◽  
The Impact ◽  
The Relationship

A perturbed uptake of micronutrients, such as minerals and vitamins, impacts on different human diseases, including cancer and neurological disorders. Several data converge towards a crucial role played by many micronutrients in genome integrity maintenance and in the establishment of a correct DNA methylation pattern. Failure in the proper accomplishment of these processes accelerates senescence and increases the risk of developing cancer, by promoting the formation of chromosome aberrations and deregulating the expression of oncogenes. Here, the main recent evidence regarding the impact of some B vitamins on DNA damage and cancer is summarized, providing an integrated and updated analysis, mainly centred on vitamin B 6 . In many cases, it is difficult to finely predict the optimal vitamin rate that is able to protect against DNA damage, as this can be influenced by a given individual's genotype. For this purpose, a precious resort is represented by model organisms which allow limitations imposed by more complex systems to be overcome. In this review, we show that Drosophila can be a useful model to deeply understand mechanisms underlying the relationship between vitamin B 6 and genome integrity.

scholarly journals Long Non-coding RNAs Associated with Brain Disorders: A Literature Review

2021 ◽  
Vol In Press (In Press) ◽  
Author(s):  
Arash Abdolmaleki ◽  
Sevin Ferdowsi ◽  
Asadollah Asadi ◽  
Yassin Panahi
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Literature Review ◽  
Neurodegenerative Diseases ◽  
Neurological Disorders ◽  
Brain Disorders ◽  
Parkinson’S Diseases ◽  
The Central Nervous System ◽  
Non Coding Rnas

Context: Neurodegenerative diseases (NDs) are neurological disorders characterized by the degeneration of the central nervous system (CNS). Studies have examined interactions between long non-coding RNAs (lncRNAs) and functioning of the CNS in NDs. In this study, we summarized the role of different lncRNAs in most NDs. Methods: In this study, different papers published between years 2003 and 2020 were reviewed. Results: LncRNAs can play a significant role in the development of brain disorders. Conclusions: The dysregulation of lncRNAs has been shown to affect NDs such as Alzheimer's disease (AD) and Parkinson’s diseases (PD). In this review, we compiled recent findings related to the main lncRNAs associated with brain disorders.

scholarly journals The Impact of the CX3CL1/CX3CR1 Axis in Neurological Disorders

Cells ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 2277
Author(s):  
Paulina Pawelec ◽  
Malgorzata Ziemka-Nalecz ◽  
Joanna Sypecka ◽  
Teresa Zalewska
Keyword(s):  
Central Nervous System ◽  
Neurological Disorders ◽  
Brain Disorders ◽  
The Central Nervous System ◽  
Microglial Response ◽  
The Impact ◽  
Insight Into ◽  
Receptor Cx3cr1 ◽  
Disease Specific

Fractalkine (FKN, CX3CL1) is a transmembrane chemokine expressed by neurons in the central nervous system (CNS). CX3CL1 signals through its unique receptor, CX3CR1, that is expressed in microglia. Within the CNS, fractalkine acts as a regulator of microglia activation in response to brain injury or inflammation. During the last decade, there has been a growing interest in the roles that the CX3CL1/CX3CR1 signaling pathway plays in the neuropathology of a diverse array of brain disorders. However, the reported results have proven controversial, indicating that a disruption of the CX3CL1 axis induces a disease-specific microglial response that may have either beneficial or detrimental effects. Therefore, it has become clear that the understanding of neuron-to-glia signals mediated by CX3CL1/CX3CR1 at different stages of diseases could provide new insight into potential therapeutic targets. Hence, the aim of this review is to provide a summary of the literature on the emerging role of CX3CL1 in animal models of some brain disorders.

Choosing a Markov blanket

2020 ◽  
Vol 43 ◽  
Author(s):  
Thomas Parr
Keyword(s):  
Markov Blanket ◽  
Target Article ◽  
The Relationship

Abstract This commentary focuses upon the relationship between two themes in the target article: the ways in which a Markov blanket may be defined and the role of precision and salience in mediating the interactions between what is internal and external to a system. These each rest upon the different perspectives we might take while “choosing” a Markov blanket.

Staring Down Death

Crisis ◽  
2016 ◽  
Vol 37 (3) ◽  
pp. 212-217 ◽  
Author(s):  
Thomas E. Joiner ◽  
Melanie A. Hom ◽  
Megan L. Rogers ◽  
Carol Chu ◽  
Ian H. Stanley ◽  
...  
Keyword(s):  
Suicide Risk ◽  
Clinical Utility ◽  
Blink Rate ◽  
Specific Task ◽  
Careful Planning ◽  
Eye Blink ◽  
Eye Blinks ◽  
Potential Clinical Utility ◽  
The Relationship

Abstract. Background: Lowered eye blink rate may be a clinically useful indicator of acute, imminent, and severe suicide risk. Diminished eye blink rates are often seen among individuals engaged in heightened concentration on a specific task that requires careful planning and attention. Indeed, overcoming one’s biological instinct for survival through suicide necessitates premeditation and concentration; thus, a diminished eye blink rate may signal imminent suicidality. Aims: This article aims to spur research and clinical inquiry into the role of eye blinks as an indicator of acute suicide risk. Method: Literature relevant to the potential connection between eye blink rate and suicidality was reviewed and synthesized. Results: Anecdotal, cognitive, neurological, and conceptual support for the relationship between decreased blink rate and suicide risk is outlined. Conclusion: Given that eye blinks are a highly observable behavior, the potential clinical utility of using eye blink rate as a marker of suicide risk is immense. Research is warranted to explore the association between eye blink rate and acute suicide risk.

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