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Topic Review
Biography
Topic Review
Therapeutic Plasmapheresis with Albumin Replacement in Alzheimer’s Disease
Reducing the burden of beta-amyloid accumulation and toxic autoimmunity-related proteins, one of the recognized pathophysiological markers of chronic and common neurological disorders such as Alzheimer’s disease (AD) and multiple sclerosis (MS), may be a valid alternative therapy to reduce their accumulation in the brain and thus reduce the progression of these disorders.
322
11 Mar 2022
Topic Review
Therapeutic of Valproic Acid Metabolites ant Its Role
Valproic acid (CH3CH2CH2)2CHCOOH 2-propylvaleric acid, VPA) is a fatty acid derivative originally synthesized. Valproic acid (VPA) and its salts are psychotropic drugs that are widely used in neurological diseases (epilepsy, neuropathic pain, migraine, etc.) and psychiatric disorders (schizophrenia, bipolar affective disorder, addiction diseases, etc.). In addition, the indications for the appointment of valproate have been expanding in recent years in connection with the study of new mechanisms of action of therapeutic and toxic metabolites of VPA in the human body. Thus, VPA is considered a component of disease-modifying therapy for multiple tumors, neurodegenerative diseases (Huntington’s disease, Parkinson’s disease, Duchenne progressive dystrophy, etc.), and human immunodeficiency syndrome. The metabolism of VPA is complex and continues to be studied. Known pathways of VPA metabolism include: β-oxidation in the tricarboxylic acid cycle (acetylation); oxidation with the participation of cytochrome P-450 isoenzymes (P-oxidation); and glucuronidation. The complex metabolism of VPA explains the diversity of its active and inactive metabolites, which have therapeutic, neutral, or toxic effects.
452
03 Feb 2023
Topic Review
Therapeutic Effect of Dutasteride in Amyotrophic Lateral Sclerosis
Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disease that is characterized by the loss of upper and lower motor neurons (MNs) in the cerebral cortex, brainstem and spinal cord, with consequent weakness, atrophy and the progressive paralysis of all muscles. There is currently no medical cure, and riluzole and edaravone are the only two known approved drugs for treating this condition. However, they have limited efficacy, and hence there is a need to find new molecules. Dutasteride, a dual inhibitor of type 1 and type 2 5α-reductase (5AR) enzymes, the therapeutic purposes of which, to date, are the treatment of benign prostatic hyperplasia and androgenic alopecia, shows great anti-ALS properties by the molecular-topology methodology.
814
07 Sep 2022
Topic Review
The Tryptophan-Kynurenine Metabolic Pathway
Tryptophan (TRP) is one of the essential amino acids, which participates in protein synthesis. The tryptophan’s main metabolic route is the kynurenine pathway (KP) through which approximately 90-95% of TRP degrades into nicotinamide adenine dinucleotide (NAD+) and other bioactive metabolites. The appropriate amount of NAD+ is essential to maintain the operation and the viability of cells. The other molecules are neurotoxic, neuroprotective, oxidant, antioxidant, and/or immune modifiers. They play an important role in the function of the brain and the peripheral tissues. The change in the levels of the bioactive molecules is considered to contribute to the development of a wide range of illnesses from cancer to immunologic, neurodegenerative, and psychiatric diseases.
10.7K
10 Aug 2021
Topic Review
The Sigma-2 Receptor
The sigma-2 receptor (S2R), encoded by TMEM97, is expressed in brain and retinal cells, and regulates cell functions via its co-receptor progesterone receptor membrane component 1 (PGRMC1), and through other protein–protein interactions. S2R modulates key pathways, including autophagy, trafficking, oxidative stress, and amyloid-β and α-synuclein toxicity, involved in age-related degenerative diseases of the central nervous system. Furthermore, S2R modulation can ameliorate functional deficits in cell-based and animal models of neurodegenerative disease.
440
06 Apr 2023
Topic Review
The Role of Polysaccharide in Treating Neurodegenerative Disorders
The prevalence of neurodegenerative pathologies increases significantly with growing life expectancy. Neurodegenerative diseases including common diseases such as Alzheimer’s disease (AD) and Parkinson’s disease (PD) impose a global public health burden. In this context, natural products could play a leading role in the search for new drugs for the treatment of neurodegeneration. Of note, more than 80 percent of drugs are of natural origin. Natural polysaccharides (general formula of Cx(H2O)y; where x is number 200_2500) occurs naturally in living matter (on the contrary to polysaccharides combined artificially in the process of organic synthesis) and principally play structural and storage functions. Natural polysaccharides can be classified according to their origin, namely plants (e.g., starch, cellulose), algae (e.g., agar, alginates), animals (e.g., chitin, hyaluronic acid), bacteria (e.g., dextran, polylactosamine), and fungal (e.g., chitosan, elsinan). As one of the most widely distributed biomolecules in nature, natural polysaccharides have received considerable attention because of their diverse pharmacological activity as inhibitors of cellular processes, with their antioxidant, anticoagulant, antithrombotic and anticancer effects.
449
09 Feb 2022
Topic Review
The Peritumoral Zone in Diffuse Low-Grade Gliomas
Diffuse low-grade gliomas (DLGGs) are heterogeneous and poorly circumscribed neoplasms with isolated tumor cells that extend beyond the margins of the lesion depicted on MRI. Efforts to demarcate the glioma core from the surrounding healthy brain led to define an intermediate region, the so-called peritumoral zone (PTZ).
267
21 Apr 2022
Topic Review
TENG-Based Self-Powered Neuroprosthetics
TENG-Based Self-Powered Neuroprosthetics is a neuroprosthetic system using a triboelectric nanogenerator as the power source to generator the current pulses required for neural stimulations. The thin-film triboelectric nanogenerator can be attached onto the heart or buried under the skin to convert the mechanical energy from the movement of organs, such as heart beat, or the hand tapping onto the skin to electrical current pulses. This system is promising to realize a fully self-powered neural modulation with much reduced device complexity.
632
10 Oct 2020
Topic Review
Tau-Based Fluid Biomarker Diagnostics
Despite continued efforts, there remain no disease-modifying drugs approved by the United States Food and Drug Administration (FDA) or European Medicines Agency (EMA) to combat the global epidemic of Alzheimer’s disease. Currently approved medicines are unable to delay disease progression and are limited to symptomatic treatment. It is well established that the pathophysiology of this disease remains clinically silent for decades prior to symptomatic clinical decline. Identifying those at risk of disease progression could allow for effective treatment whilst the therapeutic window remains open for preservation of quality of life. This review aims to evaluate critically the current advances in the interpretation of tau-based biomarkers and their use to provide insights into the onset and progression of Alzheimer’s disease, whilst highlighting important future directions for the field
512
14 Dec 2020
Topic Review
Tau Aggregates in the Brain
P-tau accumulates with age in a roughly hierarchical manner, but avoids abundance in the neocortex unless co-occurring with amyloid-β. Neurodegenerative tauopathies tend to have p-tau morphologies that differ from aging and Alzheimer’s disease. Tau isoforms (3R vs. 4R) have a tendency to vary with tauopathy phenotype for unknown reasons. Selective vulnerability to p-tau and spatial-temporal disconnect from amyloid-β are evident in aging. P-tau assessment at autopsy involves tissue decomposition, which may skew microanatomical observations toward limited biological meaning. Two major consensus guidelines for interpreting p-tau at autopsy emphasize the challenges of clinicopathologic correlation, and reinforce the observation that regional neurodegeneration is a better correlate of clinical signs than is proteinopathy.
556
22 Dec 2020
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