Search results for "Serine peptidase"

showing 3 items of 3 documents

Low SPINK5 expression in chronic rhinosinusitis

2012

Objectives/Hypothesis: Chronic rhinosinusitis (CRS) is a multifactorial disease that probably arises as a result of genetic diversity and environmental factors. SPINK5 is a serine protease inhibitor, which is supposed to be an important regulator of epithelial barrier maintenance. The role of SPINK5 polymorphisms and expression in CRS, especially in individuals with aspirin intolerance, is unclear. Study Design: SPINK5 single-nucleotide polymorphisms (SNPs) and SPINK5 expression levels were correlated with CRS without (CRSsNP) and with nasal polyps (CRSwNP), aspirin intolerance, asthma, and allergies. Methods: One hundred four nasal tissue samples, 15 from patients with CRSsNP, 59 from pati…

AdultMalePathologymedicine.medical_specialtyAllergyAdolescentGenotypeProteinase Inhibitory Proteins SecretorySingle-nucleotide polymorphismPolymerase Chain ReactionPolymorphism Single NucleotideSensitivity and SpecificitySampling Studieslaw.inventionDrug HypersensitivityTissue Culture TechniquesYoung AdultNasal PolypsReference ValueslawGenotypemedicineHumansSNPNasal polypsRNA MessengerSinusitisPolymerase chain reactionAgedRhinitisAsthmaAged 80 and overAspirinbusiness.industryMiddle Agedmedicine.diseaseAsthmaPathophysiologyNasal MucosaGene Expression RegulationOtorhinolaryngologyChronic DiseaseImmunologySerine Peptidase Inhibitor Kazal-Type 5FemalebusinessThe Laryngoscope
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Proteolytic processing of Bacillus thuringiensis Vip3A proteins by two Spodoptera species

2014

Abstract Vip3 proteins have been described to be secreted by Bacillus thuringiensis during the vegetative growth phase and to display a broad insecticidal spectrum against lepidopteran larvae. Vip3Aa protoxin has been reported to be significantly more toxic to Spodoptera frugiperda than to Spodoptera exigua and differences in the midgut processing have been proposed to be responsible. In contrast, we have found that Vip3Ae is essentially equally toxic against these two species. Proteolysis experiments were performed to study the stability of Vip3A proteins to peptidase digestion and to see whether the differences found could explain differences in toxicity against these two Spodoptera speci…

InsecticidesPhysiologyProteolysisBacterial ProteinSpodopteraSpodopteraMicrobiologyVegetative insecticidal proteinBacterial ProteinsSpecies SpecificitySpodoptera exiguaBacillus thuringiensisExiguamedicineAnimalsPest Control BiologicalMidgut peptidaseInsecticideChymotrypsinbiologymedicine.diagnostic_testAnimalMedicine (all)Serine EndopeptidasesfungiSpodoptera frugiperdaMidgutbiology.organism_classificationTrypsinSerine EndopeptidaseSerine peptidaseBiochemistryMode of actionLarvaInsect Sciencebiology.proteinDigestionDigestive Systemmedicine.drugJournal of Insect Physiology
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The NG2 Proteoglycan Protects Oligodendrocyte Precursor Cells against Oxidative Stress via Interaction with OMI/HtrA2.

2015

The NG2 proteoglycan is characteristically expressed by oligodendrocyte progenitor cells (OPC) and also by aggressive brain tumours highly resistant to chemo- and radiation therapy. Oligodendrocyte-lineage cells are particularly sensitive to stress resulting in cell death in white matter after hypoxic or ischemic insults of premature infants and destruction of OPC in some types of Multiple Sclerosis lesions. Here we show that the NG2 proteoglycan binds OMI/HtrA2, a mitochondrial serine protease which is released from damaged mitochondria into the cytosol in response to stress. In the cytosol, OMI/HtrA2 initiates apoptosis by proteolytic degradation of anti-apoptotic factors. OPC in which NG…

lcsh:MedicineApoptosisdrug effects [Cytosol]HTRA2 protein humangenetics [RNA Small Interfering]genetics [Serine Endopeptidases]genetics [Glioblastoma]570 Life sciencespathology [Glioblastoma]MiceCytosolCerebellumpathology [Cerebellum]RNA Small Interferinglcsh:Sciencemetabolism [Antigens]Mice Knockoutchondroitin sulfate proteoglycan 4metabolism [Proteoglycans]Brain NeoplasmsSerine Endopeptidasesdrug effects [Mitochondria]metabolism [Cerebellum]High-Temperature Requirement A Serine Peptidase 2Mitochondriametabolism [Brain Neoplasms]Gene Expression Regulation Neoplasticpharmacology [Antibodies Neutralizing]genetics [Mitochondrial Proteins]Proteoglycans570 BiowissenschaftenResearch ArticleProtein BindingSignal Transductionpathology [Brain Neoplasms]Primary Cell Culturedrug effects [Cerebellum]drug effects [Apoptosis]metabolism [Mitochondrial Proteins]Mitochondrial Proteinsantagonists & inhibitors [Proteoglycans]pharmacology [Hydrogen Peroxide]genetics [Antigens]Cell Line Tumormetabolism [Serine Endopeptidases]AnimalsHumansddc:610metabolism [RNA Small Interfering]Antigenslcsh:RHtra2 protein mouseHydrogen Peroxidemetabolism [Mitochondria]Antibodies Neutralizinggenetics [Proteoglycans]genetics [Brain Neoplasms]Mice Inbred C57BLOxidative Stressnervous systemlcsh:Qmetabolism [Cytosol]Glioblastomametabolism [Glioblastoma]
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