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Polyamine Metabolism in Disease and Polyamine-Targeted Therapies

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ISBN: 9783039211524 / 9783039211531 Year: Pages: 240 DOI: 10.3390/books978-3-03921-153-1 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Biology
Added to DOAB on : 2019-12-09 11:49:15
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Abstract

Polyamines are ubiquitous polycations essential for all cellular life. The most common polyamines in eukaryotes, spermine, spermidine, and putrescine, exist in millimolar intracellular concentrations that are tightly regulated through biosynthesis, catabolism, and transport. Polyamines interact with, and regulate, negatively charged macromolecules, including nucleic acids, proteins, and ion channels. Accordingly, alterations in polyamine metabolism affect cellular proliferation and survival through changes in gene expression and transcription, translation, autophagy, oxidative stress, and apoptosis. Dysregulation of these multifaceted polyamine functions contribute to multiple disease processes, thus their metabolism and function have been targeted for preventive or therapeutic intervention. The correlation between elevated polyamine levels and cancer is well established, and ornithine decarboxylase, the rate-limiting biosynthetic enzyme in the production of putrescine, is a bona fide transcriptional target of the Myc oncogene. Furthermore, induced polyamine catabolism contributes to carcinogenesis that is associated with certain forms of chronic infection and/or inflammation through the production of reactive oxygen species. These and other characteristics specific to cancer cells have led to the development of polyamine-based agents and inhibitors aimed at exploiting the polyamine metabolic pathway for chemotherapeutic and chemopreventive benefit. In addition to cancer, polyamines are involved in the pathologies of neurodegenerative diseases including Alzheimer’s and Parkinson’s, parasitic and infectious diseases, wound healing, ischemia/reperfusion injuries, and certain age-related conditions, as polyamines are known to decrease with age. As in cancer, polyamine-based therapies for these conditions are an area of active investigation. With recent advances in immunotherapy, interest has increased regarding polyamine-associated modulation of immune responses, as well as potential immunoregulation of polyamine metabolism, the results of which could have relevance to multiple disease processes. The goal of this Special Issue of Medical Sciences is to present the most recent advances in polyamine research as it relates to health, disease, and/or therapy.

Keywords

polyamine transport inhibitor --- Drosophila imaginal discs --- difluoromethylorthinine --- DFMO --- polyamine --- cancer --- metabolism --- difluoromethylornithine --- polyamine transport inhibitor --- pancreatic ductal adenocarcinoma --- curcumin --- diferuloylmethane --- ornithine decarboxylase --- polyamine --- NF-?B --- chemoprevention --- carcinogenesis --- polyphenol --- ornithine decarboxylase --- polyamines --- untranslated region --- polyamines --- ?-difluoromethylornithine --- polyamine transport system --- melanoma --- mutant BRAF --- spermine --- spermidine --- putrescine --- polyamine metabolism --- mast cells --- eosinophils --- neutrophils --- M2 macrophages --- airway smooth muscle cells --- Streptococcus pneumoniae --- polyamines --- pneumococcal pneumonia --- proteomics --- capsule --- complementation --- metabolism --- cadaverine --- polyamines --- ornithine decarboxylase --- difluoromethylornithine --- eflornithine --- DFMO --- African sleeping sickness --- hirsutism --- colorectal cancer --- neuroblastoma --- aging --- atrophy --- autophagy --- oxidative stress --- polyamines --- skeletal muscle --- spermidine --- spermine oxidase --- transgenic mouse --- immunity --- T-lymphocytes --- B-lymphocytes --- tumor immunity --- metabolism --- epigenetics --- autoimmunity --- polyamines --- ornithine decarboxylase --- polyamine analogs --- spermidine/spermine N1-acetyl transferase --- spermine oxidase --- bis(ethyl)polyamine analogs --- breast cancer --- MCF-7 cells --- transgenic mice --- polyamines --- MYC --- protein synthesis in cancer --- neuroblastoma --- protein expression --- antizyme 1 --- ornithine decarboxylase --- CRISPR --- human embryonic kidney 293 (HEK293) --- cell differentiation --- DFMO --- ornithine decarboxylase --- osteosarcoma --- polyamines --- polyamines --- polyamine metabolism --- antizyme --- antizyme inhibitors --- ornithine decarboxylase --- Snyder-Robinson Syndrome --- spermine synthase --- X-linked intellectual disability --- polyamine transport --- spermidine --- spermine --- transglutaminase

Tea in Health and Disease

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ISBN: 9783038979869 / 9783038979876 Year: Pages: 222 DOI: 10.3390/books978-3-03897-987-6 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Biology --- Nutrition and Food Sciences
Added to DOAB on : 2019-06-26 08:44:06
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Tea, made from the leaves of the Camellia senenisis plant, is the second most consumed beverage worldwide after water. Accumulating evidence from cellular, animal, epidemiological and clinical studies have linked tea consumption to various health benefits, such as chemoprevention of cancers, chronic inflammation, heart and liver diseases, diabetes, neurodegenerative diseases, etc. Although such health benefits have not been consistently observed in some intervention trials, positive results from clinical trials have provided direct evidence supporting the cancer-protective effect of green tea. In addition, numerous mechanisms of action have been suggested to contribute to tea’s disease-preventive effects. Furthermore, effects of the processing and storage of tea, as well as additives on tea’s properties have been investigated.

Emerging Marine Biotoxins

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ISBN: 9783039215133 / 9783039213498 Year: Pages: 206 DOI: 10.3390/books978-3-03921-349-8 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Biology
Added to DOAB on : 2019-12-09 11:49:15
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The emergence of marine and freshwater toxins in geographical areas where they have never been reported before is a concern due to the considerable impact on (sea)food contamination, and consequently, on public health. Several groups of marine biotoxins, in particular tetrodotoxins, ciguatoxins, and palytoxins, are included among the relevant marine biotoxins that have recently emerged in several coastal areas. A similar situation has been observed in freshwater, where cyanobacterial toxins, such as microcystins, could end up in unexpected areas such as the estuaries where shellfish are cultivated. Climate change and the increased availability of nutrients have been considered as the key factors in the expansion of all of these toxins into new areas; however, this could also be due to more intense biological invasions, more sensitive analytical methods, or perhaps even an increased scientific interest in these natural contaminations. The incidences of human intoxications due to the consumption of seafood contaminated with these toxins have made their study an important task to accomplish in order to protect human health. This Special Issue has a focus on a wide variety of emerging biotoxin classes and techniques to identify and quantify them.

Dual Specificity Phosphatases: From Molecular Mechanisms to Biological Function

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ISBN: 9783039216888 / 9783039216895 Year: Pages: 240 DOI: 10.3390/books978-3-03921-689-5 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Biology
Added to DOAB on : 2019-12-09 11:49:16
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Dual specificity phosphatases (DUSPs) constitute a heterogeneous group of protein tyrosine phosphatases with the ability to dephosphorylate Ser/Thr and Tyr residues from proteins, as well as from other non-proteinaceous substrates including signaling lipids. DUSPs include, among others, MAP kinase (MAPK) phosphatases (MKPs) and small-size atypical DUSPs. MKPs are enzymes specialized in regulating the activity and subcellular location of MAPKs, whereas the function of small-size atypical DUSPs seems to be more diverse. DUSPs have emerged as key players in the regulation of cell growth, differentiation, stress response, and apoptosis. DUSPs regulate essential physiological processes, including immunity, neurobiology and metabolic homeostasis, and have been implicated in tumorigenesis, pathological inflammation and metabolic disorders. Accordingly, alterations in the expression or function of MKPs and small-size atypical DUSPs have consequences essential to human disease, making these enzymes potential biological markers and therapeutic targets. This Special Issue covers recent advances in the molecular mechanisms and biological functions of MKPs and small-size atypical DUSPs, and their relevance in human disease.

Venom and Toxin as Targeted Therapy

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ISBN: 9783039211890 / 9783039211906 Year: Pages: 180 DOI: 10.3390/books978-3-03921-190-6 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Biology
Added to DOAB on : 2019-12-09 11:49:15
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Targeted therapy has developed significantly in the last one and half decades, prescribing specific medications for treatment of particular diseases, such as cancer, diabetes, and heart disease. One of the most exciting recent developments in targeted therapies was the isolation of disease-specific molecules from natural resources, such as animal venoms and plant metabolites/toxins, for use as templates for new drug motif designs. In addition, the study of venom proteins/peptides and toxins naturally targeted mammalian receptors and demonstrated high specificity and selectivity towards defined ion channels of cell membranes. Research has also focsed intensely on receptors. The focus of this Special Issue of Toxins addressed the most recent advances using animal venoms, such as frog secretions, bee/ant venoms and plant/fungi toxins, as medicinal therapy. Recent advances in venom/toxin/immunotoxins for targeted cancer therapy and immunotherapy, along with using novel disease-specific venom-based protein/peptide/toxin and currently available FDA-approved drugs for combinationtreatments will be discussed. Finally, we included an overview of select promising toad/snake venom-based peptides/toxins potentially able to address the forthcoming challenges in this field. Both research and review articles proposing novelties or overviews, respectively, were published in this Special Issue after rigorous evaluation and revision by expert peer reviewers.

Keywords

disintegrin --- blood vessel formation --- VEGF --- antioxidant enzymes --- oxidative stress biomarkers --- bicarinalin --- antimicrobial peptide --- Helicobacter pylori --- gastric cells --- bacterial adhesion --- SEM --- atopic dermatitis (AD) --- house dust mite extract (DFE) --- 2,4-dinitrochlorobenzene (DNCB) --- bee venom phospholipase A2 (bvPLA2) --- skin inflammation --- CD206 --- mannose receptor --- immunotoxin --- Moxetumomab pasudotox --- targeted therapy --- CD22 --- B cell non-Hodgkin lymphoma --- acute lymphoblastic leukemia --- mantle cell lymphoma --- ribosome-inactivating protein --- BLF1 --- eIF4A --- MYCN --- cancer --- neuroblastoma --- apoptosis --- antimicrobial peptide (AMP) --- dermaseptin --- anuran skin secretion --- drug design --- antimicrobial activity --- anticancer activity --- antiviral activity --- Bougainvillea --- bouganin --- cancer therapy --- immunotherapy --- immunotoxins --- ribosome-inactivating proteins --- rRNA N-glycosylase activity --- VB6-845 --- orellanine --- clearance --- fungal toxin --- half-life --- toad toxins --- Chansu --- Huachansu --- cane toad --- bufadienolides --- indolealkylamines --- inflammation --- cancer --- obsessive–compulsive disorder (OCD) --- snake venom --- cancer --- target therapy --- snake venom --- Malaysian cobras --- N. kaouthia --- N. sumatrana --- O. hannah --- anticancer --- Apis mellifera syriaca --- bee venom --- melittin --- LC-ESI-MS --- solid phase extraction --- in vitro effects --- frog --- mass spectrometry --- molecular cloning --- bombesin-related peptide --- smooth muscle --- Bee venom --- complement system --- decay accelerating factor --- atopic dermatitis --- complement dependent cytotoxicity --- membrane attack complex --- n/a

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