Öjar Melefors

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Articles

Article: ANTIMICROBIAL AGENTS AND CHEMOTHERAPY. 2019;63(4):e02201-e02218
Dynamics of Resistance Plasmids in Extended-Spectrum-β-Lactamase-Producing Enterobacteriaceae during Postinfection Colonization
Brolund A; Rajer F; Giske CG; Melefors O; Titelman E; Sandegren L
Article: HEALTH SECURITY. 2017;15(4):384-391
NETWORK EXPERIENCES FROM A CROSS-SECTOR BIOSAFETY LEVEL-3 LABORATORY COLLABORATION: A SWEDISH FORUM FOR BIOPREPAREDNESS DIAGNOSTICS
Thelaus J; Lindberg A; Lambertz ST; Bystrom M; Forsman M; Lindmark H; Knutsson R; Baverud V; Brave A; Jureen P; Lundin Zumpe A; Melefors O
Article: MICROBIAL ECOLOGY IN HEALTH AND DISEASE. 2017;28(1):1345574
Ancient permafrost staphylococci carry antibiotic resistance genes.
Kashuba E; Dmitriev AA; Kamal SM; Melefors O; Griva G; Römling U; Ernberg I; Kashuba V; Brouchkov A
Article: VIRUSES. 2015;7(4):1804-1822
A suggested new bacteriophage genus, "Kp34likevirus", within the Autographivirinae subfamily of Podoviridae.
Eriksson H; Maciejewska B; Latka A; Majkowska-Skrobek G; Hellstrand M; Melefors Ö; Wang J-T; Kropinski AM; Drulis-Kawa Z; Nilsson AS
Article: MICROBIOLOGY RESOURCE ANNOUNCEMENTS. 2014;2(2):e00186-e00114
Draft Genome Sequence of Pseudomonas aeruginosa SG17M, an Environmental Isolate Belonging to Clone C, Prevalent in Patients and Aquatic Habitats.
Lee C; Peters V; Melefors O; Römling U
Article: PLOS ONE. 2014;9(8):e103274
A Multicentre Hospital Outbreak in Sweden Caused by Introduction of a vanB2 Transposon into a Stably Maintained pRUM-Plasmid in an Enterococcus faecium ST192 Clone
Sivertsen A; Billstrom H; Melefors O; Liljequist BO; Wisell KT; Ullberg M; Ozenci V; Sundsfjord A; Hegstad K
Article: BIOSECURITY AND BIOTERRORISM. 2013;11:S78-S86
THE NEED FOR HIGH-QUALITY WHOLE-GENOME SEQUENCE DATABASES IN MICROBIAL FORENSICS
Sjodin A; Broman T; Melefors O; Andersson G; Rasmusson B; Knutsson R; Forsman M
Article: PLOS ONE. 2013;8(6):e65793
Plasmidome-Analysis of ESBL-Producing Escherichia coli Using Conventional Typing and High-Throughput Sequencing
Brolund A; Franzen O; Melefors O; Tegmark-Wisell K; Sandegren L
Article: PLOS ONE. 2013;8(5):e63027
Adaptive Mutations and Replacements of Virulence Traits in the Escherichia coli O104:H4 Outbreak Population
Guy L; Jernberg C; Norling JA; Ivarsson S; Hedenstrom I; Melefors O; Liljedahl U; Engstrand L; Andersson SGE
Article: MBIO. 2011;2(6):10.1128/mbio.00239-10.1128/mbio.00211
Genome Sequencing Reveals a Phage in Helicobacter pylori
Lehours P; Vale FF; Bjursell MK; Melefors O; Advani R; Glavas S; Guegueniat J; Gontier E; Lacomme S; Matos AA; Menard A; Megraud F; Engstrand L; Andersson AF
Article: NATURE PROTOCOLS. 2011;6(9):1367-1376
Titration-free 454 sequencing using Y adapters
Zheng Z; Advani A; Melefors O; Glavas S; Nordstrom H; Ye W; Engstrand L; Andersson AF
Article: PLOS ONE. 2011;6(1):e16647
Genomic Stability over 9 Years of an Isoniazid Resistant Mycobacterium tuberculosis Outbreak Strain in Sweden
Sandegren L; Groenheit R; Koivula T; Ghebremichael S; Advani A; Castro E; Pennhag A; Hoffner S; Mazurek J; Pawlowski A; Kan B; Bruchfeld J; Melefors O; Kallenius G
Article: NUCLEIC ACIDS RESEARCH (NAR). 2010;38(13):e137
Titration-free massively parallel pyrosequencing using trace amounts of starting material
Zheng Z; Advani A; Melefors O; Glavas S; Nordstrom H; Ye W; Engstrand L; Andersson AF
Article: ENVIRONMENTAL MICROBIOLOGY. 2010;12(2):524-540
Complex regulatory network encompassing the Csr, c-di-GMP and motility systems of Salmonella Typhimurium
Jonas K; Edwards AN; Ahmad I; Romeo T; Roemling U; Melefors O
Article: FEMS MICROBIOLOGY LETTERS. 2009;297(1):80-86
The Escherichia coli CsrB and CsrC small RNAs are strongly induced during growth in nutrient-poor medium
Jonas K; Melefors O
Article: MOLECULAR MICROBIOLOGY. 2008;70(3):595-607
Sortase-mediated assembly and surface topology of adhesive pneumococcal pili
Falker S; Nelson AL; Morfeldt E; Jonas K; Hultenby K; Ries J; Melefors O; Normark S; Henriques-Normark B
Article: MOLECULAR MICROBIOLOGY. 2008;70(1):236-257
The RNA binding protein CsrA controls cyclic di-GMP metabolism by directly regulating the expression of GGDEF proteins
Jonas K; Edwards AN; Simm R; Romeo T; Romling U; Melefors O
Article: RESEARCH IN MICROBIOLOGY. 2008;159(6):486-493
An Escherichia coli asr mutant has decreased fitness during colonization in a mouse model
Armalyte J; Seputiene V; Melefors O; Suziedeliene E
Article: BMC MICROBIOLOGY. 2007;7:70
Roles of curli, cellulose and BapA in Salmonella biofilm morphology studied by atomic force microscopy
Jonas K; Tomenius H; Kader A; Normark S; Roemling U; Belova LM; Melefors O
Article: JOURNAL OF BACTERIOLOGY. 2006;188(23):8303-8306
pH-dependent activation of the BarA-UvrY two-component system in Escherichia coli
Mondragon V; Franco B; Jonas K; Suzuki K; Romeo T; Melefors O; Georgellis D
Article: FEMS MICROBIOLOGY LETTERS. 2006;264(2):232-237
Identification of YhdA as a regulator of the Escherichia coli carbon storage regulation system
Jonas K; Tomenius H; Roemling U; Georgellis D; Melefors O
Article: JOURNAL OF BIOLOGICAL CHEMISTRY. 2006;281(27):18707-18714
Of two cytosolic aconitases expressed in drosophila, only one functions as an iron-regulatory protein
Lind MI; Missirlis F; Melefors O; Uhrigshardt H; Kirby K; Phillips JP; Soderhall K; Rouault TA
Article: BMC MICROBIOLOGY. 2006;6:27
The Escherichia coli BarA-UvrY two-component system is a virulence determinant in the urinary tract
Tomenius H; Pernestig AK; Jonas K; Georgellis D; Möllby R; Normark S; Melefors Ö
Article: JOURNAL OF HEPATOLOGY. 2006;44(3):544-551
Regulatory effects of tumor necrosis factor-alpha and interleukin-6 on HAMP expression in iron loaded rat hepatocytes
Dzikaite V; Holmström P; Stål P; Eckes K; Hagen K; Eggertsen G; Gåfvels M; Melefors Ö; Hultcrantz R
Article: JOURNAL OF BACTERIOLOGY. 2005;187(21):7317-7324
Genetic and functional characterization of the Escherichia coli BarA-UvrY two-component system:: Point mutations in the HAMP linker of the BarA sensor give a dominant-negative phenotype
Tomenius H; Pernestig AK; Méndez-Catalá CF; Georgellis D; Normark S; Melefors Ö
Article: FREE RADICAL RESEARCH. 2004;38(10):1133-1142
Secretion of ferritin by iron-laden macrophages and influence of lipoproteins
Yuan XM; Li W; Baird SK; Carlsson M; Melefors Ö
Article: RESEARCH IN MICROBIOLOGY. 2004;155(7):535-542
Transcriptional analysis of the acid-inducible asr gene in enterobacteria
Seputiene V; Suziedelis K; Normark S; Melefors Ö; Suziedeliene E
Article: BIOCHIMICA ET BIOPHYSICA ACTA: INTERNATIONAL JOURNAL OF BIOCHEMISTRY AND BIOPHYSICS. 2003;1630(1):19-24
The regulatory effect of heme on erythroid aminolevulinate synthase in natural erythroid cells
Dzikaite V; Hultcrantz R; Melefors Ö
Article: JOURNAL OF HEPATOLOGY. 2003;39(3):308-314
Structure and liver cell expression pattern of the HFE gene in the rat
Holmström P; Dzikaite V; Hultcrantz R; Melefors Ö; Eckes K; Stål P; Kinnman N; Smedsrod B; Gåfvels M; Eggertsen G
Article: JOURNAL OF BACTERIOLOGY. 2003;185(8):2475-2484
Molecular characterization of the acid-inducible asr gene of Escherichia coli and its role in acid stress response
Seputiene V; Motiejunas D; Suziedelis K; Tomenius H; Normark S; Melefors O; Suziedeliene E
Article: JOURNAL OF BACTERIOLOGY. 2003;185(3):843-853
The Escherichia coli BarA-UvrY two-component system is needed for efficient switching between glycolytic and gluconeogenic carbon sources
Pernestig AK; Georgellis D; Romeo T; Suzuki K; Tomenius H; Normark S; Melefors Ö
Article: JOURNAL OF BACTERIOLOGY. 2002;184(18):5130-5140
Regulatory circuitry of the CsrA/CsrB and BarA/UvrY systems of Escherichia coli
Suzuki K; Wang X; Weilbacher T; Pernestig AK; Melefors Ö; Georgellis D; Babitzke P; Romeo T
Article: SCANDINAVIAN JOURNAL OF GASTROENTEROLOGY. 2002;37(6):725-731
Iron overload decreases the protective effect of tumour necrosis factor-α on rat hepatocytes exposed to oxidative stress
Hagen K; Eckes K; Melefors Ö; Hultcrantz R
Article: JOURNAL OF BIOLOGICAL CHEMISTRY. 2001;276(1):225-231
Identification of UvrY as the cognate response regulator for the BarA sensor kinase in Escherichia coli
Pernestig AK; Melefors Ö; Georgellis D
Article: BLOOD. 2000;96(2):740-746
A novel endoproteolytic processing activity in mitochondria of erythroid cells and the role in heme synthesis
Dzikaite V; Kanopka A; Brock JH; Kazlauskas A; Melefors Ö
Article: INTERNATIONAL JOURNAL OF BIOCHEMISTRY AND CELL BIOLOGY. 1999;31(3-4):499-508
Susceptibility of cultured rat hepatocytes to oxidative stress by peroxides and iron.: The extracellular matrix affects the toxicity of tert-butyl hydroperoxide
Hagen K; Zhu C; Melefors Ö; Hultcrantz R
Article: INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY. 1999;29(1):1-9
An atypical Iron-Responsive Element (IRE) within crayfish ferritin mRNA and an Iron Regulatory Protein 1 (IRP1)-like protein from crayfish hepatopancreas
Huang TS; Melefors Ö; Lind MI; Söderhäll K
Article: FEBS LETTERS. 1998;436(3):476-482
Drosophila ferritin mRNA:: alternative RNA splicing regulates the presence of the iron-responsive element
Lind MI; Ekengren S; Melefors Ö; Söderhäll K
Article: DIABETES. 1998;47(2):255-262
β-hydroxybutyrate increases reactive oxygen species in late but not in early postimplantation embryonic cells in vitro
Forsberg H; Eriksson UJ; Melefors Ö; Welsh N
Article: CHROMOSOME RESEARCH. 1997;5(7):463-465
Using PRINS for gene mapping in polytene chromosomes
Gu HF; Lind MI; Wieslander L; Landegren U; Soderhall K; Melefors O
Article: BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS. 1996;221(2):437-441
Translational regulation in vivo of the Drosophila melanogaster mRNA encoding succinate dehydrogenase iron protein via iron responsive elements
Melefors O
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Review: FUTURE MICROBIOLOGY. 2009;4(3):341-358
Regulation of c-di-GMP metabolism in biofilms
Jonas K; Melefors O; Romling U
Meeting abstract: ATHEROSCLEROSIS SUPPLEMENTS. 2003;4(2):306
Erythrophagocytosis leads to iron accumulation in human atheroma and influence of lipoproteins on iron exocytosis by macrophages
Li W; Carlsson M; Melefors Ö; Yuan XM
Published conference paper: ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY. 2000;485:137-142
The role of the AirS two-component system in uropathogenic Escherichia coli
Pernestig AK; Normark SJ; Georgellis D; Melefors Ö
Letter: MOLECULAR MICROBIOLOGY. 1995;17(3):595-596
RNASE-K - ONE LESS LETTER IN THE ALPHABET SOUP
LUNDBERG U; MELEFORS O; SOHLBERG B; GEORGELLIS D; VONGABAIN A

Employments

Affiliated to Research, Department of Laboratory Medicine, Karolinska Institutet, 2023-2026

Degrees and Education

Docent, Karolinska institutet, 2000

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