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Sex-specific effects of naturally occurring variants in the dopamine receptor D2 locus on insulin secretion and Type 2 diabetes susceptibility

Guigas, B. (author), de Leeuw van Weenen, J.E. (author), van Leeuwen, N. (author), Simonis-Bik, A.M. (author), van Haeften, T.W. (author), Nijpels, G. (author), Houwing-Duistermaat, J.J. (author), Beekman, M. (author), Deelen, J. (author), Havekes, L.M. (author), Penninx, B.W.J.H. (author), Vogelzangs, N. (author), van 't Riet, E. (author), Dehghan, A. (author), Hofman, A. (author), Witteman, J.C. (author), Uitterlinden, A.G. (author), Grarup, N. (author), Jørgensen, T. (author), Witte, D.R. (author), Lauritzen, T. (author), Hansen, T. (author), Pedersen, O. (author), Hottenga, J. (author), Romijn, J.A. (author), Diamant, M. (author), Kramer, M.H.H. (author), Heine, R.J. (author), Willemsen, G. (author), Dekker, J.M. (author), Eekhoff, E.M. (author), Pijl, H. (author), de Geus, E.J. (author), Slagboom, P.E. (author), 't Hart, L.M. (author)

Aims: Modulation of dopamine receptor D2 (DRD2) activity affects insulin secretion in both rodents and isolated pancreatic β-cells. We hypothesized that single nucleotide polymorphisms in the DRD2/ANKK1 locus may affect susceptibility to Type 2 diabetes in humans. Methods: Four potentially functional variants in the coding region of the DRD2...

article 2014

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Isolation and characterization of Alicycliphilus denitrificans strain BC, which grows on benzene with chlorate as the electron acceptor

Weelink, S.A.B. (author), Tan, N.C.G. (author), ten Broeke, H. (author), van den Kieboom, C. (author), van Doesburg, W. (author), Langenhoff, A.A.M. (author), Gerritse, J. (author), Junca, H. (author), Stams, A.J.M. (author), TNO Bouw en Ondergrond (author)

A bacterium, strain BC, was isolated from a benzene-degrading chlorate-reducing enrichment culture. Strain BC degrades benzene in conjunction with chlorate reduction. Cells of strain BC are short rods that are 0.6 μm wide and 1 to 2 μm long, are motile, and stain gram negative. Strain BC grows on benzene and some other aromatic compounds with...

article 2008

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Characterization of the Aspergillus niger prtT, a unique regulator of extracellular protease encoding genes

Punt, P.J. (author), Schuren, F.H.J. (author), Lehmbeck, J. (author), Christensen, T. (author), Hjort, C. (author), van den Hondel, C.A.M.J.J. (author), TNO Kwaliteit van Leven (author)

Expression of several Aspergillus niger genes encoding major secreted, but not vacuolar, protease genes including the major acid protease gene pepA, was shown to be affected in the previously isolated A. niger protease mutant, AB1.13 [Mattern, I.E., van Noort, J.M., van den Berg, P., Archer, D.A., Roberts, I.N., Hondel, C.A.M.J.J., 1992....

article 2008

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Determination of the relationship between group A streptococcal genome content, M type, and toxic shock syndrome by a mixed genome microarray

Vlaminckx, B.J.M. (author), Schuren, F.H.J. (author), Montijn, R.C. (author), Caspers, M.P.M. (author), Fluit, A.C. (author), Wannet, W.J.B. (author), Schouls, L.M. (author), Verhoef, J. (author), Jansen, W.T.M. (author), TNO Kwaliteit van Leven (author)

Group A streptococci (GAS), or Streptococcus pyogenes, are associated with a remarkable variety of diseases, ranging from superficial infections to life-threatening diseases such as toxic-shock-like syndrome (TSS). GAS strains belonging to M types M1 and M3 are associated with TSS. This study aims to obtain insight into the gene profiles...

article 2007

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Database mining and transcriptional analysis of genes encoding inulin-modifying enzymes of Aspergillus niger

Yuan, X.L. (author), Goosen, C. (author), Kools, H. (author), van der Maarel, M.J.E.C. (author), van den Hondel, C.A.M.J.J. (author), Dijkhuizen, L. (author), Ram, A.F.J. (author), TNO Kwaliteit van Leven (author)

As a soil fungus, Aspergillus niger can metabolize a wide variety of carbon sources, employing sets of enzymes able to degrade plant-derived polysaccharides. In this study the genome sequence of A. niger strain CBS 513.88 was surveyed, to analyse the gene/enzyme network involved in utilization of the plant storage polymer inulin, and of sucrose,...

article 2006

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Branching mutants of Aspergillus oryzae with improved amylase and protease production on solid substrates

te Biesebeke, R. (author), Record, E. (author), van Biezen, N. (author), Heerikhuisen, M. (author), Franken, A. (author), Punt, P.J. (author), van den Hondel, C.A.M.J.J. (author), TNO Kwaliteit van Leven (author)

To study the relation between the number of hyphal tips and protein secretion during growth on a solid substrate, we have constructed two mutant strains of Aspergillus oryzae with increased hyphal branching. We have analysed hydrolytic enzyme activities during growth on wheat kernels (WK) of A. oryzae strains carrying the disrupted allele of the...

article 2005

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The solvent-tolerant Pseudomonas putida S12 as host for the production of cinnamic acid from glucose

Nijkamp, K. (author), van Luijk, N. (author), de Bont, J.A.M. (author), Wery, J. (author), TNO Kwaliteit van Leven TNO Voeding (author)

A Pseudomonas putida S12 strain was constructed that efficiently produced thefine chemical cinnamic acid from glucose or glycerol via the central metabolite phenylalanine. The gene encoding phenylalanine ammonia lyase from the yeast Rhodosporidium toruloides was introduced. Phenylalanine availability was the main bottleneck in cinnamic acid...

article 2005

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Production of bifunctional proteins by Aspergillus awamori: Llama variable heavy chain antibody fragment (VHH) R9 coupled to Arthromyces ramosus peroxidase (ARP)

Joosten, V. (author), Roelofs, M.S. (author), van den Dries, N. (author), Goosen, T. (author), Verrips, C.T. (author), van den Hondel, C.A.M.J.J. (author), Lokman, B.C. (author), TNO Kwaliteit van Leven (author)

The Arthromyces ramosus peroxidase gene (arp) was genetically fused to either the 5′- or 3′-terminal ends of the gene encoding llama variable heavy chain antibody fragment VHH R9, resulting in the fusion expression cassettes ARP-R9 or R9-ARP. Aspergillus awamori transformants were obtained which produced up to 30 mg l-1 fusion protein in the...

article 2005

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Unravelling the multiple effects of lactic acid stress on Lactobacillus plantarum by transcription profiling

Pieterse, B. (author), Leer, R.J. (author), Schuren, F.H.J. (author), van der Werf, M.J. (author), TNO Kwaliteit van Leven (author)

The organic acid lactate is the predominant fermentation product of Lactobacillus plantarum. The undissociated form of this organic acid is a strong growth inhibitor for the organism. Different theories have been postulated to explain the inhibitory effects of lactic acid: (i) toxicity arising from the dissipation of the membrane potential, (ii)...

article 2005

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The cell wall stress response in Aspergillus niger involves increased expression of the glutamine: Fructose-6-phosphate amidotransferase-encoding gene (gfaA) and increased deposition of chitin in the cell wall

Ram, A.F.J. (author), Arentshorst, M. (author), Damveld, R.A. (author), van Kuyk, P.A. (author), Klis, F.M. (author), van den Hondel, C.A.M.J.J. (author), TNO Voeding (author)

Perturbation of cell wall synthesis in Saccharomyces cerevisiae, either by mutations in cell wall synthesis-related genes or by adding compounds that interfere with normal cell wall assembly, triggers a compensatory response to ensure cell wall integrity. This response includes an increase in chitin levels in the cell wall. Here it is shown that...

article 2004

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Biochemical and molecular characerization of a levansucrase from Lactobacillus reuteri

van Hijum, S.A.F.T. (author), Szalowska, E. (author), van der Maarel, M.J.E.C. (author), Dijkhuizen, L. (author), TNO Voeding Centraal Instituut voor Voedingsonderzoek TNO (author)

Lactobacillus reuteri strain 121 employs a fructosyltransferase (FTF) to synthesize a fructose polymer [a fructan of the levan type, with β(2→6) linkages] from sucrose or raffinose. Purification of this FTF (a levansucrase), and identification of peptide amino acid sequences, allowed isolation of the first Lactobacillus levansucrase gene (lev),...

article 2004

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DNA analysis of the genes encoding acidocin LF221 A and acidocin LF221 B, two bacteriocins produced by Lactobacillus gasseri LF221

Majhenič, A.Č. (author), Venema, K. (author), Allison, G.E. (author), Matijašić, B.B. (author), Rogelj, I. (author), Klaenhammer, T.R. (author), TNO Voeding (author)

Lactobacillus gasseri LF221, an isolate from the feces of a child, produces two bacteriocins. Standard procedures for molecular techniques were used to locate, clone and sequence the fragments of LF221 chromosomal DNA carrying the acidocin LF221 A and B structural genes, respectively. Sequencing analysis revealed the gene of acidocin LF221 A to...

article 2004

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Endoplasmic reticulum stress leads to the selective transcriptional downregulation of the glucoamylase gene in Aspergillus niger

Al-Sheikh, H. (author), Watson, A.J. (author), Lacey, G.A. (author), Punt, P.J. (author), MacKenzie, D.A. (author), Jeenes, D.J. (author), Pakula, T. (author), Penttilä, M. (author), Alcocer, M.J.C. (author), Archer, D.B. (author), TNO Voeding (author)

We describe a new endoplasmic reticulum (ER)-associated stress response in the filamentous fungus Aspergillus niger. The inhibition of protein folding within the ER leads to cellular responses known collectively as the unfolded protein response (UPR) and we show that the selective transcriptional downregulation of the gene encoding glucoamylase,...

article 2004

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The role of the Aspergillus niger furin-type protease gene in processing of fungal proproteins and fusion proteins: Evidence for alternative processing of recombinant (fusion-) proteins

Punt, P.J. (author), Drint-Kuijvenhoven, A. (author), Lokman, B.C. (author), Spencer, J.A. (author), Jeenes, D. (author), Archer, D.A. (author), van den Hondel, C.A.M.J.J. (author)

We have characterized growth and protein processing characteristics of Aspergillus niger strains carrying a disrupted allele of the previously cloned and characterized kexB gene [Appl. Environ. Microbiol. 66 (2000) 363] encoding a furin-type endoprotease. Deletion of the single-copy gene confirms it to be non-essential but disruptant strains...

article 2003

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Elevated osteopontin levels in active relapsing-remitting multiple sclerosis

Vogt, M.H.J. (author), Lopatinskaya, L. (author), Smits, M. (author), Polman, C.H. (author), Nagelkerken, L. (author), TNO Preventie en Gezondheid (author)

In the search for proteins that might play a role in the pathogenesis of multiple sclerosis (MS), osteopontin (OPN) has been identified as the most prominent cytokine-encoding gene expressed within MS lesions. Here, we report significantly increased OPN protein levels in plasma of relapsing-remitting MS patients. In contrast, OPN protein levels...

article 2003

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Analysis of allelic expression patterns of IL-2, IL-3, IL-4, and IL-13 in human CD4+ T cell clones

TNO Preventie en Gezondheid (author), Bayley, J.P. (author), Bakker, A.M. (author), Kaijzel, E.L. (author), Wierenga, E.A. (author), van der Pouw-Kraan, T.C.T.M. (author), Huizinga, T.W.J. (author), Verweij, C.L. (author)

The occurrence of monoallelic expression of cytokine genes in single cells has been convincingly demonstrated, but there have been few reports of this phenomenon in T cell clones. Here we describe studies on the expression of alleles of the human genes encoding IL-2, IL-3, IL-4, and IL-13 in human CD4+ T cell clones. In contrast to the results...

article 2003

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Identification and genetic analysis of a common molecular variant of histidine-rich glycoprotein with a difference of 2KD in apparent molecular weight

Hennis, B.C. (author), van Boheemen, P.A. (author), Wakabayashi, S. (author), Koide, T. (author), Hoffmann, J.J.M.L. (author), Kievit, P. (author), Dooijewaard, G. (author), Jansen, J.G. (author), Klutf, C. (author), TNO Preventie en Gezondheid (author)

Two forms of histidine-rich glycoprotein (HRG) were detected on SDS-PAGE by silver staining and immunoblotting after isolation of the protein from pooled plasma using immune-affinity chromatography followed by chromatography with heparin-Sepharose. Both forms were single-chain molecules and the apparent molecular weights of form 1 and form 2...

article 1995

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Hepatocellular localisation of biosynthesis of vitronectin. Characterisation of the primary structure of rat vitronectin

Otter, M. (author), Kuiper, J. (author), Rijken, D. (author), van Zonneveld, A.-J. (author), TNO Preventie en Gezondheid (author)

To characterize the primary structure of rat Vn, a cDNA library constructed from freshly isolated rat hepatocytes, was screened with a human Vn cDNA probe. Comparison of the sequence of the obtained rat cDNA clone with the sequences of human, mouse and rabbit Vn cDNA's showed predominantly consensus in the somatomedin B domain, the RGD-sequence...

article 1995

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The construction of new vehicles for the cloning of transcription termination signals

Enger-Valk, B.E. (author), van Rotterdam, J. (author), Pouwels, P.H. (author), Medisch Biologisch Laboratorium TNO (author)

Chemicals/CAS: DNA Restriction Enzymes, EC 3.1.21; DNA, Recombinant; Plasmids; Tryptophan, 73-22-3

article 1981