World journal of biological chemistry最新文献

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Mutual interaction between oxidative stress and endoplasmic reticulum stress in the pathogenesis of diseases specifically focusing on non-alcoholic fatty liver disease. 氧化应激和内质网应激在非酒精性脂肪肝疾病发病机制中的相互作用。
World journal of biological chemistry Pub Date : 2018-10-18 DOI: 10.4331/wjbc.v9.i1.1
Junichi Fujii, Takujiro Homma, Sho Kobayashi, Han Geuk Seo
{"title":"Mutual interaction between oxidative stress and endoplasmic reticulum stress in the pathogenesis of diseases specifically focusing on non-alcoholic fatty liver disease.","authors":"Junichi Fujii,&nbsp;Takujiro Homma,&nbsp;Sho Kobayashi,&nbsp;Han Geuk Seo","doi":"10.4331/wjbc.v9.i1.1","DOIUrl":"10.4331/wjbc.v9.i1.1","url":null,"abstract":"<p><p>Reactive oxygen species (ROS) are produced during normal physiologic processes with the consumption of oxygen. While ROS play signaling roles, when they are produced in excess beyond normal antioxidative capacity this can cause pathogenic damage to cells. The majority of such oxidation occurs in polyunsaturated fatty acids and sulfhydryl group in proteins, resulting in lipid peroxidation and protein misfolding, respectively. The accumulation of misfolded proteins in the endoplasmic reticulum (ER) is enhanced under conditions of oxidative stress and results in ER stress, which, together, leads to the malfunction of cellular homeostasis. Multiple types of defensive machinery are activated in unfolded protein response under ER stress to resolve this unfavorable situation. ER stress triggers the malfunction of protein secretion and is associated with a variety of pathogenic conditions including defective insulin secretion from pancreatic β-cells and accelerated lipid droplet formation in hepatocytes. Herein we use nonalcoholic fatty liver disease (NAFLD) as an illustration of such pathological liver conditions that result from ER stress in association with oxidative stress. Protecting the ER by eliminating excessive ROS <i>via</i> the administration of antioxidants or by enhancing lipid-metabolizing capacity <i>via</i> the activation of peroxisome proliferator-activated receptors represent promising therapeutics for NAFLD.</p>","PeriodicalId":23691,"journal":{"name":"World journal of biological chemistry","volume":"9 1","pages":"1-15"},"PeriodicalIF":0.0,"publicationDate":"2018-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4331/wjbc.v9.i1.1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"36664552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 48
PDRG1 at the interface between intermediary metabolism and oncogenesis. PDRG1 处于中间代谢和肿瘤发生之间的界面。
World journal of biological chemistry Pub Date : 2017-11-26 DOI: 10.4331/wjbc.v8.i4.175
María Ángeles Pajares
{"title":"<i>PDRG1</i> at the interface between intermediary metabolism and oncogenesis.","authors":"María Ángeles Pajares","doi":"10.4331/wjbc.v8.i4.175","DOIUrl":"10.4331/wjbc.v8.i4.175","url":null,"abstract":"<p><p>PDRG1 is a small oncogenic protein of 133 residues. In normal human tissues, the p53 and DNA damage-regulated gene 1 (<i>PDRG1</i>) gene exhibits maximal expression in the testis and minimal levels in the liver. Increased expression has been detected in several tumor cells and in response to genotoxic stress. High-throughput studies identified the PDRG1 protein in a variety of macromolecular complexes involved in processes that are altered in cancer cells. For example, this oncogene has been found as part of the RNA polymerase II complex, the splicing machinery and nutrient sensing machinery, although its role in these complexes remains unclear. More recently, the PDRG1 protein was found as an interaction target for the catalytic subunits of methionine adenosyltransferases. These enzymes synthesize S-adenosylmethionine, the methyl donor for, among others, epigenetic methylations that occur on the DNA and histones. In fact, downregulation of S-adenosylmethionine synthesis is the first functional effect directly ascribed to PDRG1. The existence of global DNA hypomethylation, together with increased PDRG1 expression, in many tumor cells highlights the importance of this interaction as one of the putative underlying causes for cell transformation. Here, we will review the accumulated knowledge on this oncogene, emphasizing the numerous aspects that remain to be explored.</p>","PeriodicalId":23691,"journal":{"name":"World journal of biological chemistry","volume":"8 4","pages":"175-186"},"PeriodicalIF":0.0,"publicationDate":"2017-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/c9/66/WJBC-8-175.PMC5714802.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35241266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Control of nuclear-cytoplasmic shuttling of Ankrd54 by PKCδ. PKCδ对Ankrd54核细胞质穿梭的控制。
World journal of biological chemistry Pub Date : 2017-08-26 DOI: 10.4331/wjbc.v8.i3.163
Amy L Samuels, Alison Louw, Reza Zareie, Evan Ingley
{"title":"Control of nuclear-cytoplasmic shuttling of Ankrd54 by PKCδ.","authors":"Amy L Samuels,&nbsp;Alison Louw,&nbsp;Reza Zareie,&nbsp;Evan Ingley","doi":"10.4331/wjbc.v8.i3.163","DOIUrl":"https://doi.org/10.4331/wjbc.v8.i3.163","url":null,"abstract":"<p><strong>Aim: </strong>To identify and characterize the effect of phosphorylation on the subcellular localization of Ankrd54.</p><p><strong>Methods: </strong>HEK293T cells were treated with calyculin A, staurosporin or phorbol 12-myristate 13-acetate (PMA). Cells were transfected with eGFP-tagged Ankrd54 with or without Lyn tyrosine kinase (wild-type, <i>Y397F</i> mutant, or <i>Y508F</i> mutant). The subcellular localization was assessed by immunofluorescence imaging of cells, immunoblotting of subcellular fractionations. The phosphorylation of Ankrd54 was monitored using Phos-tagTM gel retardation. Phosphorylated peptides were analysed by multiple-reaction-monitoring (MRM) proteomic analysis.</p><p><strong>Results: </strong>Activation of PKC kinases using PMA promoted nuclear export of Ankrd54 and correlated with increased Ankrd54 phosphorylation, assayed using Phos-tagTM gel retardation. Co-expression of an active form of the PKCδ isoform specifically promoted both phosphorylation and cytoplasmic localization of Ankrd54, while PKCδ, Akt and PKA did not. Alanine mutation of several serine residues in the amino-terminal region of Ankrd54 (Ser14, Ser17, Ser18, Ser19) reduced both PMA induced cytoplasmic localization and phosphorylation of Ankrd54. Using MRM proteomic analysis, phosphorylation of the Ser18 residue of Ankrd54 was readily detectable in response to PMA stimulation. PMA stimulation of cells co-expressing Ankrd54 and Lyn tyrosine kinase displayed increased co-immunoprecipitation and enhanced co-localization in the cytoplasm.</p><p><strong>Conclusion: </strong>We identify phosphorylation by PKCδ as a major regulator of nuclear-cytoplasmic shuttling of Ankrd54, and its interaction with the tyrosine kinase Lyn.</p>","PeriodicalId":23691,"journal":{"name":"World journal of biological chemistry","volume":"8 3","pages":"163-174"},"PeriodicalIF":0.0,"publicationDate":"2017-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/7e/48/WJBC-8-163.PMC5579962.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35524615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Role of pro- and anti-inflammatory phenomena in the physiopathology of type 2 diabetes and obesity. 促炎和抗炎现象在2型糖尿病和肥胖的生理病理中的作用。
World journal of biological chemistry Pub Date : 2017-05-26 DOI: 10.4331/wjbc.v8.i2.120
Luciano Pirola, José Candido Ferraz
{"title":"Role of pro- and anti-inflammatory phenomena in the physiopathology of type 2 diabetes and obesity.","authors":"Luciano Pirola,&nbsp;José Candido Ferraz","doi":"10.4331/wjbc.v8.i2.120","DOIUrl":"https://doi.org/10.4331/wjbc.v8.i2.120","url":null,"abstract":"<p><p>In obesity, persistent low-grade inflammation is considered as a major contributor towards the progression to insulin resistance and type 2 diabetes while in lean subjects the immune environment is non-inflammatory. Massive adipose tissue (AT) infiltration by pro-inflammatory M1 macrophages and several T cell subsets as obesity develops leads to the accumulation - both in the AT and systemically - of numerous pro-inflammatory cytokines, including interleukin-1β (IL-1β), tumor necrosis factor α, IL-17 and IL-6 which are strongly associated with the progression of the obese phenotype towards the metabolic syndrome. At the same time, anti-inflammatory M2 macrophages and Th subsets producing the anti-inflammatory cytokines IL-10, IL-5 and interferon-γ, including Th2 and T-reg cells are correlated to the maintenance of AT homeostasis in lean individuals. Here, we discuss the basic principles in the control of the interaction between the AT and infiltrating immune cells both in the lean and the obese condition with a special emphasis on the contribution of pro- and anti-inflammatory cytokines to the establishment of the insulin-resistant state. In this context, we will discuss the current knowledge about alterations in the levels on pro- and anti-inflammatory cytokines in obesity, insulin resistance and type 2 diabetes mellitus, in humans and animal models. Finally, we also briefly survey the recent novel therapeutic strategies that attempt to alleviate or reverse insulin resistance and type 2 diabetes <i>via</i> the administration of recombinant inhibitory antibodies directed towards some pro-inflammatory cytokines.</p>","PeriodicalId":23691,"journal":{"name":"World journal of biological chemistry","volume":"8 2","pages":"120-128"},"PeriodicalIF":0.0,"publicationDate":"2017-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4331/wjbc.v8.i2.120","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35068020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 88
Endocrine disrupting chemicals in mixture and obesity, diabetes and related metabolic disorders. 内分泌干扰物与肥胖、糖尿病及相关代谢紊乱的混合物。
World journal of biological chemistry Pub Date : 2017-05-26 DOI: 10.4331/wjbc.v8.i2.108
Brigitte Le Magueresse-Battistoni, Emmanuel Labaronne, Hubert Vidal, Danielle Naville
{"title":"Endocrine disrupting chemicals in mixture and obesity, diabetes and related metabolic disorders.","authors":"Brigitte Le Magueresse-Battistoni,&nbsp;Emmanuel Labaronne,&nbsp;Hubert Vidal,&nbsp;Danielle Naville","doi":"10.4331/wjbc.v8.i2.108","DOIUrl":"https://doi.org/10.4331/wjbc.v8.i2.108","url":null,"abstract":"<p><p>Obesity and associated metabolic disorders represent a major societal challenge in health and quality of life with large psychological consequences in addition to physical disabilities. They are also one of the leading causes of morbidity and mortality. Although, different etiologic factors including excessive food intake and reduced physical activity have been well identified, they cannot explain the kinetics of epidemic evolution of obesity and diabetes with prevalence rates reaching pandemic proportions. Interestingly, convincing data have shown that environmental pollutants, specifically those endowed with endocrine disrupting activities, could contribute to the etiology of these multifactorial metabolic disorders. Within this review, we will recapitulate characteristics of endocrine disruption. We will demonstrate that metabolic disorders could originate from endocrine disruption with a particular focus on convincing data from the literature. Eventually, we will present how handling an original mouse model of chronic exposition to a mixture of pollutants allowed demonstrating that a mixture of pollutants each at doses beyond their active dose could induce substantial deleterious effects on several metabolic end-points. This proof-of-concept study, as well as other studies on mixtures of pollutants, stresses the needs for revisiting the current threshold model used in risk assessment which does not take into account potential effects of mixtures containing pollutants at environmental doses, <i>e.g</i>., the real life exposure. Certainly, more studies are necessary to better determine the nature of the chemicals to which humans are exposed and at which level, and their health impact. As well, research studies on substitute products are essential to identify harmless molecules.</p>","PeriodicalId":23691,"journal":{"name":"World journal of biological chemistry","volume":"8 2","pages":"108-119"},"PeriodicalIF":0.0,"publicationDate":"2017-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4331/wjbc.v8.i2.108","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35068019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 92
B-1 cells modulate the murine macrophage response to Leishmania major infection. B-1细胞调节小鼠巨噬细胞对利什曼原虫感染的反应。
World journal of biological chemistry Pub Date : 2017-05-26 DOI: 10.4331/wjbc.v8.i2.151
Angelica F Arcanjo, Marise P Nunes, Elias B Silva-Junior, Monique Leandro, Juliana Dutra Barbosa da Rocha, Alexandre Morrot, Debora Decote-Ricardo, Celio Geraldo Freire-de-Lima
{"title":"B-1 cells modulate the murine macrophage response to <i>Leishmania major</i> infection.","authors":"Angelica F Arcanjo,&nbsp;Marise P Nunes,&nbsp;Elias B Silva-Junior,&nbsp;Monique Leandro,&nbsp;Juliana Dutra Barbosa da Rocha,&nbsp;Alexandre Morrot,&nbsp;Debora Decote-Ricardo,&nbsp;Celio Geraldo Freire-de-Lima","doi":"10.4331/wjbc.v8.i2.151","DOIUrl":"https://doi.org/10.4331/wjbc.v8.i2.151","url":null,"abstract":"<p><strong>Aim: </strong>To investigate the modulatory effect of B-1 cells on murine peritoneal macrophages infected with <i>Leishmania major</i> (<i>L. major</i>) <i>in vitro</i>.</p><p><strong>Methods: </strong>Peritoneal macrophages obtained from BALB/c and BALB/c XID mice were infected with <i>L. major</i> and cultured in the presence or absence of B-1 cells obtained from wild-type BALB/c mice. Intracellular amastigotes were counted, and interleukin-10 (IL-10) production was quantified in the cellular supernatants using an enzyme-linked immunosorbent assay. The levels of the lipid mediator prostaglandin E2 (PGE<sub>2</sub>) were determined using a PGE<sub>2</sub> enzyme immunoassay kit (Cayman Chemical, Ann Arbor, MI), and the number of lipid bodies was quantified in the cytoplasm of infected macrophages in the presence and absence of B-1 cells. Culturing the cells with selective PGE<sub>2</sub>-neutralizing drugs inhibited PGE<sub>2</sub> production and confirmed the role of this lipid mediator in IL-10 production. In contrast, we demonstrated that B-1 cells derived from IL-10 KO mice did not favor the intracellular growth of <i>L. major</i>.</p><p><strong>Results: </strong>We report that B-1 cells promote the growth of <i>L. major</i> amastigotes inside peritoneal murine macrophages. We demonstrated that the modulatory effect was independent of physical contact between the cells, suggesting that soluble factor(s) were released into the cultures. We demonstrated in our co-culture system that B-1 cells trigger IL-10 production by <i>L. major</i>-infected macrophages. Furthermore, the increased secretion of IL-10 was attributed to the presence of the lipid mediator PGE<sub>2</sub> in supernatants of <i>L. major</i>-infected macrophages. The presence of B-1 cells also favors the production of lipid bodies by infected macrophages. In contrast, we failed to obtain the same effect on parasite replication inside <i>L. major</i>-infected macrophages when the B-1 cells were isolated from IL-10 knockout mice.</p><p><strong>Conclusion: </strong>Our results show that elevated levels of PGE<sub>2</sub> and IL-10 produced by B-1 cells increase <i>L. major</i> growth, as indicated by the number of parasites in cell cultures.</p>","PeriodicalId":23691,"journal":{"name":"World journal of biological chemistry","volume":"8 2","pages":"151-162"},"PeriodicalIF":0.0,"publicationDate":"2017-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/58/a2/WJBC-8-151.PMC5439166.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35068023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 16
Immunological aspects of age-related diseases. 老年疾病的免疫学问题。
World journal of biological chemistry Pub Date : 2017-05-26 DOI: 10.4331/wjbc.v8.i2.129
Ken-Ichi Isobe, Naomi Nishio, Tadao Hasegawa
{"title":"Immunological aspects of age-related diseases.","authors":"Ken-Ichi Isobe, Naomi Nishio, Tadao Hasegawa","doi":"10.4331/wjbc.v8.i2.129","DOIUrl":"10.4331/wjbc.v8.i2.129","url":null,"abstract":"<p><p>The proportion of elderly people rises in the developed countries. The increased susceptibility of the elderly to infectious diseases is caused by immune dysfunction, especially T cell functional decline. Age-related hematopoietic stem cells deviate from lymphoid lineage to myeloid lineage. Thymus shrinks early in life, which is followed by the decline of naïve T cells. T-cell receptor repertoire diversity declines by aging, which is caused by cytomegalovirus-driven T cell clonal expansion. Functional decline of B cell induces antibody affinity declines by aging. Many effector functions including phagocytosis of myeloid cells are down regulated by aging. The studies of aging of myeloid cells have some controversial results. Although M1 macrophages have been shown to be replaced by anti-inflammatory (M2) macrophages by advanced age, many human studies showed that pro-inflammatory cytokines are elevated in older human. To solve this discrepancy here we divide age-related pathological changes into two categories. One is an aging of immune cell itself. Second is involvement of immune cells to age-related pathological changes. Cellular senescence and damaged cells in aged tissue recruit pro-inflammatory M1 macrophages, which produce pro-inflammatory cytokines and proceed to age-related diseases. Underlying biochemical and metabolic studies will open nutritional treatment.</p>","PeriodicalId":23691,"journal":{"name":"World journal of biological chemistry","volume":"8 2","pages":"129-137"},"PeriodicalIF":0.0,"publicationDate":"2017-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/e1/ff/WJBC-8-129.PMC5439164.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35068021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Common therapeutic target for both cancer and obesity. 癌症和肥胖的共同治疗靶点。
World journal of biological chemistry Pub Date : 2017-05-26 DOI: 10.4331/wjbc.v8.i2.102
Yie-Hwa Chang
{"title":"Common therapeutic target for both cancer and obesity.","authors":"Yie-Hwa Chang","doi":"10.4331/wjbc.v8.i2.102","DOIUrl":"https://doi.org/10.4331/wjbc.v8.i2.102","url":null,"abstract":"<p><p>Obesity and cancer are two interrelated conditions of high epidemiological need, with studies showing that obesity is responsible for nearly 25% of the relative contribution to cancer incidence. Given the connection between these conditions, a drug that can operate on both obesity and cancer is highly desirable. Such a drug is accomplishable through the development of potent anti-angiogenesis agents due to the shared underlying role of angiogenesis in the development of both diseases. Prior research has demonstrated a key role of type-2 methionine aminopeptidase (MetAP2) for angiogenesis, which has led to the development of numerous of novel inhibitors. Several irreversible MetAP2 inhibitors have entered clinical trials without great success. Though this lack of success could be attributed to off-target adverse effects, the underlying causes remain unclear. More promising reversible inhibitors have been recently developed with excellent pre-clinical results. However, due to insufficient knowledge of the biological functions of N-terminal protein processing, it is hard to predict whether these novel inhibitors would successfully pass clinical trials and thereby benefit cancer and obesity patients. Significantly more efforts are needed to advance our understanding of the regulation of methionine aminopeptidases and the processes by which they govern the function of proteins.</p>","PeriodicalId":23691,"journal":{"name":"World journal of biological chemistry","volume":"8 2","pages":"102-107"},"PeriodicalIF":0.0,"publicationDate":"2017-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4331/wjbc.v8.i2.102","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35067148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Identification of neuron selective androgen receptor inhibitors. 神经元选择性雄激素受体抑制剂的鉴定。
World journal of biological chemistry Pub Date : 2017-05-26 DOI: 10.4331/wjbc.v8.i2.138
Maya Otto-Duessel, Ben Yi Tew, Steven Vonderfecht, Roger Moore, Jeremy O Jones
{"title":"Identification of neuron selective androgen receptor inhibitors.","authors":"Maya Otto-Duessel,&nbsp;Ben Yi Tew,&nbsp;Steven Vonderfecht,&nbsp;Roger Moore,&nbsp;Jeremy O Jones","doi":"10.4331/wjbc.v8.i2.138","DOIUrl":"https://doi.org/10.4331/wjbc.v8.i2.138","url":null,"abstract":"<p><strong>Aim: </strong>To identify neuron-selective androgen receptor (AR) signaling inhibitors, which could be useful in the treatment of spinal and bulbar muscular atrophy (SBMA), or Kennedy's disease, a neuromuscular disorder in which deterioration of motor neurons leads to progressive muscle weakness.</p><p><strong>Methods: </strong>Cell lines representing prostate, kidney, neuron, adipose, and muscle tissue were developed that stably expressed the CFP-AR-YFP FRET reporter. We used these cells to screen a library of small molecules for cell type-selective AR inhibitors. Secondary screening in luciferase assays was used to identify the best cell-type specific AR inhibitors. The mechanism of action of a neuron-selective AR inhibitor was examined <i>in vitro</i> using luciferase reporter assays, immunofluorescence microscopy, and immunoprecipitations. Rats were treated with the most potent compound and tissue-selective AR inhibition was examined using RT-qPCR of AR-regulated genes and immunohistochemistry.</p><p><strong>Results: </strong>We identified the thiazole class of antibiotics as compounds able to inhibit AR signaling in a neuronal cell line but not a muscle cell line. One of these antibiotics, thiostrepton is able to inhibit the activity of both wild type and polyglutamine expanded AR in neuronal GT1-7 cells with nanomolar potency. The thiazole antibiotics are known to inhibit FOXM1 activity and accordingly, a novel FOXM1 inhibitor FDI-6 also inhibited AR activity in a neuron-selective fashion. The selective inhibition of AR is likely indirect as the varied structures of these compounds would not suggest that they are competitive antagonists. Indeed, we found that FOXM1 expression correlates with cell-type selectivity, FOXM1 co-localizes with AR in the nucleus, and that shRNA-mediated knock down of FOXM1 reduces AR activity and thiostrepton sensitivity in a neuronal cell line. Thiostrepton treatment reduces FOXM1 levels and the nuclear localization of beta-catenin, a known co-activator of both FOXM1 and AR, and reduces the association between beta-catenin and AR. Treatment of rats with thiostrepton demonstrated AR signaling inhibition in neurons, but not muscles.</p><p><strong>Conclusion: </strong>Our results suggest that thiazole antibiotics, or other inhibitors of the AR-FOXM1 axis, can inhibit AR signaling selectively in motor neurons and may be useful in the treatment or prevention of SBMA symptoms.</p>","PeriodicalId":23691,"journal":{"name":"World journal of biological chemistry","volume":"8 2","pages":"138-150"},"PeriodicalIF":0.0,"publicationDate":"2017-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4331/wjbc.v8.i2.138","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35068022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Biochemical changes in the injured brain. 受伤大脑的生化变化
World journal of biological chemistry Pub Date : 2017-02-26 DOI: 10.4331/wjbc.v8.i1.21
Seelora Sahu, Deb Sanjay Nag, Amlan Swain, Devi Prasad Samaddar
{"title":"Biochemical changes in the injured brain.","authors":"Seelora Sahu, Deb Sanjay Nag, Amlan Swain, Devi Prasad Samaddar","doi":"10.4331/wjbc.v8.i1.21","DOIUrl":"10.4331/wjbc.v8.i1.21","url":null,"abstract":"<p><p>Brain metabolism is an energy intensive phenomenon involving a wide spectrum of chemical intermediaries. Various injury states have a detrimental effect on the biochemical processes involved in the homeostatic and electrophysiological properties of the brain. The biochemical markers of brain injury are a recent addition in the armamentarium of neuro-clinicians and are being increasingly used in the routine management of neuro-pathological entities such as traumatic brain injury, stroke, subarachnoid haemorrhage and intracranial space occupying lesions. These markers are increasingly being used in assessing severity as well as in predicting the prognostic course of neuro-pathological lesions. S-100 protein, neuron specific enolase, creatinine phosphokinase isoenzyme BB and myelin basic protein are some of the biochemical markers which have been proven to have prognostic and clinical value in the brain injury. While S-100, glial fibrillary acidic protein and ubiquitin C terminal hydrolase are early biomarkers of neuronal injury and have the potential to aid in clinical decision-making in the initial management of patients presenting with an acute neuronal crisis, the other biomarkers are of value in predicting long-term complications and prognosis in such patients. In recent times cerebral microdialysis has established itself as a novel way of monitoring brain tissue biochemical metabolites such as glucose, lactate, pyruvate, glutamate and glycerol while small non-coding RNAs have presented themselves as potential markers of brain injury for future.</p>","PeriodicalId":23691,"journal":{"name":"World journal of biological chemistry","volume":"8 1","pages":"21-31"},"PeriodicalIF":0.0,"publicationDate":"2017-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/d1/5e/WJBC-8-21.PMC5329711.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34808500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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