Abstract：
:We first demonstrated that long-term increased polyamine (spermine, spermidine, putrescine) intake elevated blood spermine levels in mice and humans, and lifelong consumption of polyamine-rich chow inhibited aging-associated increase in aberrant DNA methylation, inhibited aging-associated pathological changes, and extend lifespan of mouse. Because gene methylation status is closely associated with aging-associated conditions and polyamine metabolism is closely associated with regulation of gene methylation, we investigated the effects of extracellular spermine supplementation on substrate concentrations and enzyme activities involved in gene methylation. Jurkat cells and human mammary epithelial cells were cultured with spermine and/or D,L-alpha-difluoromethylornithine (DFMO), an inhibitor of ornithine decarboxylase. Spermine supplementation inhibited enzymatic activities of adenosylmethionine decarboxylase in both cells. The ratio of decarboxylated S-adenosylmethionine to S-adenosyl-L-methionine increased by DFMO and decreased by spermine. In Jurkat cells cultured with DFMO, the protein levels of DNA methyltransferases (DNMTs) 1, 3A and 3B were not changed, however the activity of the three enzymes markedly decreased. The protein levels of these enzymes were not changed by addition of spermine, DNMT 3A and especially 3B were activated. We show that changes in polyamine metabolism dramatically affect substrate concentrations and activities of enzymes involved in gene methylation.
journal_name
Int J Mol Scijournal_title
International journal of molecular sciencesauthors
Fukui T,Soda K,Takao K,Rikiyama Tdoi
10.3390/ijms20051254subject
Has Abstractpub_date
2019-03-12 00:00:00issue
5issn
1422-0067pii
ijms20051254journal_volume
20pub_type
杂志文章abstract：:Pancreatic ductal adenocarcinoma (PDAC) is one of the most lethal types of tumours, and its incidence is rising worldwide. Although survival can be improved by surgical resection when these tumours are detected at an early stage, this cancer is usually asymptomatic, and disease only becomes apparent after metastasis. ...
journal_title：International journal of molecular sciences
pub_type： 杂志文章,评审
doi：10.3390/ijms19092468
更新日期：2018-08-21 00:00:00
abstract：:The endosomal-type Na+, K+/H+ antiporters (NHXs) play important roles in K+, vesicle pH homeostasis, and protein trafficking in plant. However, the structure governing ion transport mechanism and the key residues related to the structure-function of the endosomal-type NHXs remain unclear. Here, the structure-function ...
journal_title：International journal of molecular sciences
pub_type： 杂志文章
doi：10.3390/ijms21020428
更新日期：2020-01-09 00:00:00
abstract：:The use of self-assembly techniques may open new possibilities in scaling down electronic circuits to their ultimate limits. Deoxyribonucleic acid (DNA) nanotechnology has already demonstrated that it can provide valuable tools for the creation of nanostructures of arbitrary shape, therefore presenting an ideal platfo...
journal_title：International journal of molecular sciences
pub_type： 杂志文章,评审
doi：10.3390/ijms19103019
更新日期：2018-10-03 00:00:00
abstract：:Five 6,6'-dimethyl-2,2'-bipyridine ligands bearing N-arylmethaniminyl substituents in the 4- and 4'-positions were prepared by Schiff base condensation in which the aryl group is Ph (1), 4-tolyl (2), 4- t BuC6H4 (3), 4-MeOC6H4 (4), and 4-Me2NC6H4 (5). The homoleptic copper(I...
journal_title：International journal of molecular sciences
pub_type： 杂志文章
doi：10.3390/ijms21051735
更新日期：2020-03-03 00:00:00
abstract：:For bone regeneration, a biocompatible thermo-gelling hydrogel, hyaluronic acid-g-chitosan-g-poly(N-isopropylacrylamide) (HA-CPN) was used as a three-dimensional organic gel matrix for entrapping rabbit adipose-derived stem cells (rASCs). Biphasic calcium phosphate (BCP) ceramic microparticles were embedded within the...
journal_title：International journal of molecular sciences
pub_type： 杂志文章
doi：10.3390/ijms19092537
更新日期：2018-08-27 00:00:00
abstract：:Psoriasis vulgaris is an immune-mediated inflammatory skin disease. Although acitretin is a widely used synthetic retinoid for moderate to severe psoriasis, little is known about patients' genetics in response to this drug. In this study, 179 patients were enrolled in either the discovery set (13 patients) or replicat...
journal_title：International journal of molecular sciences
pub_type： 杂志文章
doi：10.3390/ijms18020295
更新日期：2017-01-29 00:00:00
abstract：BACKGROUND:Nowadays, the molecular mechanisms governing TSD (temperature-dependent sex determination) or GSD + TE (genotypic sex determination + temperature effects) remain a mystery in fish. METHODS:We developed three all-female families of Nile tilapia (Oreochromis niloticus), and the family with the highest male ra...
journal_title：International journal of molecular sciences
pub_type： 杂志文章
doi：10.3390/ijms19030689
更新日期：2018-02-28 00:00:00
abstract：:The human gastrointestinal tract is inhabited by many types of microbiota, including bacteria, viruses, and fungi. Dysregulations of their microenvironment are associated with various health problems, not only limited to gastrointestinal disorders, such as inflammatory bowel disease, but to impacts beyond the intestin...
journal_title：International journal of molecular sciences
pub_type： 杂志文章,评审
doi：10.3390/ijms20020387
更新日期：2019-01-17 00:00:00
abstract：:Hormonal dynamics after Plasmodiophora brassicae infection were compared in two Brassica napus cultivars-more resistant SY Alister and more sensitive Hornet, in order to elucidate responses associated with efficient defense. Both cultivars responded to infection by the early transient elevation of active cytokinins (p...
journal_title：International journal of molecular sciences
pub_type： 杂志文章
doi：10.3390/ijms19124024
更新日期：2018-12-13 00:00:00
abstract：:In inflammatory bowel diseases (IBD), the therapeutic benefit and mucosal healing from specific probiotics may relate to the modulation of dendritic cells (DCs). Herein, we assessed the immunomodulatory effects of four probiotic strains including Lactobacillus salivarius, Bifidobacterium bifidum, Bacillus coagulans an...
journal_title：International journal of molecular sciences
pub_type： 杂志文章
doi：10.3390/ijms21176266
更新日期：2020-08-29 00:00:00
abstract：:Extracellular matrix protein turnover may play an important role in left atrial (LA) remodelling. The aim is to investigate the associations between matrix metalloproteinase (MMPs), tissue inhibitor of metalloproteinase (TIMP-1) and LA volume index (LAVI) and if these associations are independent of TIMP-1 levels. Par...
journal_title：International journal of molecular sciences
pub_type： 杂志文章
doi：10.3390/ijms21144944
更新日期：2020-07-13 00:00:00
abstract：:Despite the promising pharmacological properties of curcumin, the transport and effective release of curcumin is still a challenge. The advances in functionalized nanocarriers for curcumin have also been motivated by the anticancer activity of this natural compound, aiming at targeted therapies. Here, stealth (aqueous...
journal_title：International journal of molecular sciences
pub_type： 杂志文章
doi：10.3390/ijms21103641
更新日期：2020-05-21 00:00:00
abstract：:Serum amyloid A (SAA) promotes endothelial inflammation and dysfunction that is associated with cardiovascular disease and renal pathologies. SAA is an apoprotein for high-density lipoprotein (HDL) and its sequestration to HDL diminishes SAA bioactivity. Herein we investigated the effect of co-supplementing HDL on SAA...
journal_title：International journal of molecular sciences
pub_type： 杂志文章
doi：10.3390/ijms21041316
更新日期：2020-02-15 00:00:00
abstract：:HD-Zip proteins are unique to plants, and contain a homeodomain closely linked to a leucine zipper motif, which are involved in dimerization and DNA binding. Based on homology in the HD-Zip domain, gene structure and the presence of additional motifs, HD-Zips are divided into four families, HD-Zip I⁻IV. Phylogenetic a...
journal_title：International journal of molecular sciences
pub_type： 杂志文章,评审
doi：10.3390/ijms19124047
更新日期：2018-12-14 00:00:00
abstract：:Our laboratory and others previously showed that Annexin A2 knockout (A2KO) mice had impaired blood-brain barrier (BBB) development and elevated pro-inflammatory response in macrophages, implying that Annexin A2 (AnxA2) might be one of the key endogenous factors for maintaining homeostasis of the neurovascular unit in...
journal_title：International journal of molecular sciences
pub_type： 杂志文章
doi：10.3390/ijms20246125
更新日期：2019-12-05 00:00:00
abstract：:Plants undergo several but very precise molecular, physiological, and biochemical modulations in response to biotic stresses. Mitogen-activated protein kinase (MAPK) cascades orchestrate multiple cellular processes including plant growth and development as well as plant responses against abiotic and biotic stresses. H...
journal_title：International journal of molecular sciences
pub_type： 杂志文章
doi：10.3390/ijms20123023
更新日期：2019-06-20 00:00:00
abstract：:The basic helix-loop helix (bHLH) transcription factor has been inferred to play an important role in blue and purple grain traits in common wheat, but to date, its overexpression has not been reported. In this study, the bHLH transcription factor ThMYC4E, the candidate gene controlling the blue grain trait from Th. P...
journal_title：International journal of molecular sciences
pub_type： 杂志文章
doi：10.3390/ijms21010137
更新日期：2019-12-24 00:00:00
abstract：:The protective effects of alpha-1 antitrypsin (AAT) in tacrolimus (TAC)-induced renal injury was evaluated in a rat model. The TAC group rats were subcutaneously injected with 2 mg/kg TAC every day for four weeks. The TAC with AAT group was cotreated with daily subcutaneous injections of TAC and intraperitoneal inject...
journal_title：International journal of molecular sciences
pub_type： 杂志文章
doi：10.3390/ijms21228628
更新日期：2020-11-16 00:00:00
abstract：:Metronidazole (MD) is known as a periodontitis medicine and has been widely used in antibiotics for resistance to anaerobic bacteria, periodontal disease, and other threats. To treat diseases, drug delivery carriers are needed with a high bioadhesive property and enhanced drug penetration. Poly (acrylic acid) (PAA) hy...
journal_title：International journal of molecular sciences
pub_type： 杂志文章
doi：10.3390/ijms21010187
更新日期：2019-12-26 00:00:00
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journal_title：International journal of molecular sciences
pub_type： 杂志文章,评审
doi：10.3390/ijms19124002
更新日期：2018-12-12 00:00:00
abstract：:Two mesenchymal zinc transporters, ZIP7 and ZIP13, play critical roles in dermal development. ZIP7 and ZIP13 are the closest among the conserved mammalian zinc transporters. However, whether their functions are complementary remains a controversial issue. In the present study, we found that the expression of ZIP13, bu...
journal_title：International journal of molecular sciences
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doi：10.3390/ijms20163941
更新日期：2019-08-13 00:00:00
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journal_title：International journal of molecular sciences
pub_type： 杂志文章
doi：10.3390/ijms21124473
更新日期：2020-06-23 00:00:00
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journal_title：International journal of molecular sciences
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更新日期：2019-09-05 00:00:00
abstract：:Pea (Pisum sativum L.), as a major source of plant protein, is becoming one of the major cultivated crop species worldwide. In pea, the pericarp is an important determinant of the morphological characteristics and seed yield. To investigate the molecular mechanism of pericarp elongation as well as sucrose and starch a...
journal_title：International journal of molecular sciences
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doi：10.3390/ijms20246135
更新日期：2019-12-05 00:00:00
abstract：:The rapidly activating delayed rectifier potassium current (IKr) plays a critical role in cardiac repolarization. Although IKr is known to be regulated by both α1- and β1-adrenergic receptors (ARs), the cross-talk and feedback mechanisms that dictate its response to α1- and β1-AR activation are not known. In the prese...
journal_title：International journal of molecular sciences
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doi：10.3390/ijms150814220
更新日期：2014-08-15 00:00:00
abstract：:Quorum sensing is an intercellular form of communication that bacteria use to coordinate group behaviors such as biofilm formation and the production of antibiotics and virulence factors. The term quorum sensing was originally coined to describe the mechanism underlying the onset of luminescence production in cultures...
journal_title：International journal of molecular sciences
pub_type： 杂志文章,评审
doi：10.3390/ijms140816386
更新日期：2013-08-07 00:00:00
abstract：:The recognition of cell surface glycans by lectins may be critical for the innate and adaptive immune responses. ArtinM, a d-mannose-binding lectin from Artocarpus heterophyllus, activates antigen-presenting cells by recognizing TLR2 N-glycans and induces Th1 immunity. We recently demonstrated that ArtinM stimulated C...
journal_title：International journal of molecular sciences
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doi：10.3390/ijms18071400
更新日期：2017-06-30 00:00:00
abstract：:The role of astrocytes in the glioblastoma (GBM) microenvironment is poorly understood; particularly with regard to cell invasion and drug resistance. To assess this role of astrocytes in GBMs we established an all human 2D co-culture model and a 3D hyaluronic acid-gelatin based hydrogel model (HyStem™-HP) with differ...
journal_title：International journal of molecular sciences
pub_type： 杂志文章
doi：10.3390/ijms20236017
更新日期：2019-11-29 00:00:00
abstract：:The abnormal deposition of calcium within renal parenchyma, termed nephrocalcinosis, frequently occurs as a result of impaired renal calcium handling. It is closely associated with renal stone formation (nephrolithiasis) as elevated urinary calcium levels (hypercalciuria) are a key common pathological feature underlyi...
journal_title：International journal of molecular sciences
pub_type： 杂志文章,评审
doi：10.3390/ijms21010369
更新日期：2020-01-06 00:00:00
abstract：:Photodynamic therapy (PDT) of the thoracic cavity can be performed in conjunction with surgery to treat cancers of the lung and its pleura. However, illumination of the cavity results in tissue exposure to a broad range of fluence rates. In a murine model of intrathoracic PDT, we studied the efficacy of 2-(1-hexyloxye...
journal_title：International journal of molecular sciences
pub_type： 杂志文章
doi：10.3390/ijms17010101
更新日期：2016-01-14 00:00:00
