Publication list - Publika - Scientific publications from Oslo University Hospital

Publications by Ole Herman Ambur

37 publications found

Original articles

Marienborg K, Ambur OH, Økstad OAL, Skaare D (2023)
The alginate polymer OligoG alters susceptibility of biofilm-embedded non-typeable Haemophilus influenzae to ampicillin and ciprofloxacin
JAC Antimicrob Resist, 5 (2), dlad046
DOI 10.1093/jacamr/dlad046, PubMed 37082420

Hesselberg Løvestad A, Stosic MS, Costanzi JM, Christiansen IK, Aamot HV, Ambur OH, Rounge TB (2023)
TaME-seq2: tagmentation-assisted multiplex PCR enrichment sequencing for viral genomic profiling
Virol J, 20 (1), 44
DOI 10.1186/s12985-023-02002-5, PubMed 36890572

Løvestad AH, Repesa A, Costanzi JM, Lagström S, Christiansen IK, Rounge TB, Ambur OH (2022)
Differences in integration frequencies and APOBEC3 profiles of five high-risk HPV types adheres to phylogeny
Tumour Virus Res, 14, 200247
DOI 10.1016/j.tvr.2022.200247, PubMed 36100161

Kværner AS, Birkeland E, Bucher-Johannessen C, Vinberg E, Nordby JI, Kangas H, Bemanian V, Ellonen P, Botteri E, Natvig E, Rognes T, Hovig E, Lyle R, Ambur OH, de Vos WM, Bultman S, Hjartåker A, Landberg R, Song M, Blix HS, Ursin G, Randel KR, de Lange T, Hoff G, Holme Ø et al. (2021)
The CRCbiome study: a large prospective cohort study examining the role of lifestyle and the gut microbiome in colorectal cancer screening participants
BMC Cancer, 21 (1), 930
DOI 10.1186/s12885-021-08640-8, PubMed 34407780

Lagström S, Løvestad AH, Umu SU, Ambur OH, Nygård M, Rounge TB, Christiansen IK (2021)
HPV16 and HPV18 type-specific APOBEC3 and integration profiles in different diagnostic categories of cervical samples
Tumour Virus Res, 12, 200221
DOI 10.1016/j.tvr.2021.200221, PubMed 34175494

Dube Mandishora RS, Rounge TB, Fitzpatrick M, Christiansen IK, Ambur OH, Lagström S, Stray-Pedersen B, Tommasino M, Palefsky J, Chirenje ZM (2021)
Self-collected and clinician-collected anal swabs show modest agreement for HPV genotyping
PLoS One, 16 (4), e0250426
DOI 10.1371/journal.pone.0250426, PubMed 33901223

Løvestad AH, Jørgensen SB, Handal N, Ambur OH, Aamot HV (2021)
Investigation of intra-hospital SARS-CoV-2 transmission using nanopore whole-genome sequencing
J Hosp Infect, 111, 107-116
DOI 10.1016/j.jhin.2021.02.022, PubMed 33647375

Lagström S, van der Weele P, Rounge TB, Christiansen IK, King AJ, Ambur OH (2019)
HPV16 whole genome minority variants in persistent infections from young Dutch women
J Clin Virol, 119, 24-30
DOI 10.1016/j.jcv.2019.08.003, PubMed 31446251

Ramberg BT, Halvorsen M, Før de RD, Ambur OH, Borge AIH (2019)
Co-authorship - a bone of contention
Tidsskr Nor Laegeforen, 139 (11)
DOI 10.4045/tidsskr.19.0145, PubMed 31429235

Lagström S, Umu SU, Lepistö M, Ellonen P, Meisal R, Christiansen IK, Ambur OH, Rounge TB (2019)
TaME-seq: An efficient sequencing approach for characterisation of HPV genomic variability and chromosomal integration
Sci Rep, 9 (1), 524
DOI 10.1038/s41598-018-36669-6, PubMed 30679491

Rounge TB, Meisal R, Nordby JI, Ambur OH, de Lange T, Hoff G (2018)
Evaluating gut microbiota profiles from archived fecal samples
BMC Gastroenterol, 18 (1), 171
DOI 10.1186/s12876-018-0896-6, PubMed 30409123

Feiring B, Laake I, Christiansen IK, Hansen M, Stålcrantz J, Ambur OH, Magnus P, Jonassen CM, Trogstad L (2018)
Substantial Decline in Prevalence of Vaccine-Type and Nonvaccine-Type Human Papillomavirus (HPV) in Vaccinated and Unvaccinated Girls 5 Years After Implementing HPV Vaccine in Norway
J Infect Dis, 218 (12), 1900-1910
DOI 10.1093/infdis/jiy432, PubMed 30010913

Alfsnes K, Frye SA, Eriksson J, Eldholm V, Brynildsrud OB, Bohlin J, Harrison OB, Hood DW, Maiden MCJ, Tønjum T, Ambur OH (2018)
A genomic view of experimental intraspecies and interspecies transformation of a rifampicin-resistance allele into Neisseria meningitidis
Microb Genom, 4 (11)
DOI 10.1099/mgen.0.000222, PubMed 30251949

Dube Mandishora RS, Gjøtterud KS, Lagström S, Stray-Pedersen B, Duri K, Chin'ombe N, Nygård M, Christiansen IK, Ambur OH, Chirenje MZ, Rounge TB (2018)
Intra-host sequence variability in human papillomavirus
Papillomavirus Res, 5, 180-191
DOI 10.1016/j.pvr.2018.04.006, PubMed 29723682

Hovland E, Beyene GT, Frye SA, Homberset H, Balasingham SV, Gómez-Muñoz M, Derrick JP, Tønjum T, Ambur OH (2017)
DprA from Neisseria meningitidis: properties and role in natural competence for transformation
Microbiology (Reading), 163 (7), 1016-1029
DOI 10.1099/mic.0.000489, PubMed 28696187

Dube Mandishora RS, Christiansen IK, Chin'ombe N, Duri K, Ngara B, Rounge TB, Meisal R, Ambur OH, Palefsky JM, Stray-Pedersen B, Chirenje ZM (2017)
Genotypic diversity of anogenital human papillomavirus in women attending cervical cancer screening in Harare, Zimbabwe
J Med Virol, 89 (9), 1671-1677
DOI 10.1002/jmv.24825, PubMed 28390142

Meisal R, Rounge TB, Christiansen IK, Eieland AK, Worren MM, Molden TF, Kommedal Ø, Hovig E, Leegaard TM, Ambur OH (2017)
HPV Genotyping of Modified General Primer-Amplicons Is More Analytically Sensitive and Specific by Sequencing than by Hybridization
PLoS One, 12 (1), e0169074
DOI 10.1371/journal.pone.0169074, PubMed 28045981

Molden T, Feiring B, Ambur OH, Christiansen IK, Hansen M, Laake I, Meisal R, Myrvang E, Jonassen CM, Trogstad L (2016)
Human papillomavirus prevalence and type distribution in urine samples from Norwegian women aged 17 and 21 years: A nationwide cross-sectional study of three non-vaccinated birth cohorts
Papillomavirus Res, 2, 153-158
DOI 10.1016/j.pvr.2016.05.002, PubMed 29074174

Frye SA, Lång E, Beyene GT, Balasingham SV, Homberset H, Rowe AD, Ambur OH, Tønjum T (2015)
The Inner Membrane Protein PilG Interacts with DNA and the Secretin PilQ in Transformation
PLoS One, 10 (8), e0134954
DOI 10.1371/journal.pone.0134954, PubMed 26248334

Alfsnes K, Raynaud X, Tønjum T, Ambur OH (2014)
Mathematical and live meningococcal models for simple sequence repeat dynamics - coherent predictions and observations
PLoS One, 9 (7), e101637
DOI 10.1371/journal.pone.0101637, PubMed 24999629

Kommedal Ø, Wilhelmsen MT, Skrede S, Meisal R, Jakovljev A, Gaustad P, Hermansen NO, Vik-Mo E, Solheim O, Ambur OH, Sæbø Ø, Høstmælingen CT, Helland C (2014)
Massive parallel sequencing provides new perspectives on bacterial brain abscesses
J Clin Microbiol, 52 (6), 1990-7
DOI 10.1128/JCM.00346-14, PubMed 24671797

Frye SA, Nilsen M, Tønjum T, Ambur OH (2013)
Dialects of the DNA uptake sequence in Neisseriaceae
PLoS Genet, 9 (4), e1003458
DOI 10.1371/journal.pgen.1003458, PubMed 23637627

Ambur OH, Frye SA, Nilsen M, Hovland E, Tønjum T (2012)
Restriction and sequence alterations affect DNA uptake sequence-dependent transformation in Neisseria meningitidis
PLoS One, 7 (7), e39742
DOI 10.1371/journal.pone.0039742, PubMed 22768309

Benam AV, Lång E, Alfsnes K, Fleckenstein B, Rowe AD, Hovland E, Ambur OH, Frye SA, Tønjum T (2011)
Structure-function relationships of the competence lipoprotein ComL and SSB in meningococcal transformation
Microbiology (Reading), 157 (Pt 5), 1329-1342
DOI 10.1099/mic.0.046896-0, PubMed 21330432

Lång E, Haugen K, Fleckenstein B, Homberset H, Frye SA, Ambur OH, Tønjum T (2009)
Identification of neisserial DNA binding components
Microbiology (Reading), 155 (Pt 3), 852-862
DOI 10.1099/mic.0.022640-0, PubMed 19246756

Tibballs KL, Ambur OH, Alfsnes K, Homberset H, Frye SA, Davidsen T, Tønjum T (2009)
Characterization of the meningococcal DNA glycosylase Fpg involved in base excision repair
BMC Microbiol, 9, 7
DOI 10.1186/1471-2180-9-7, PubMed 19134198

Treangen TJ, Ambur OH, Tonjum T, Rocha EP (2008)
The impact of the neisserial DNA uptake sequences on genome evolution and stability
Genome Biol, 9 (3), R60
DOI 10.1186/gb-2008-9-3-r60, PubMed 18366792

Sinha S, Ambur OH, Langford PR, Tønjum T, Kroll JS (2008)
Reduced DNA binding and uptake in the absence of DsbA1 and DsbA2 of Neisseria meningitidis due to inefficient folding of the outer-membrane secretin PilQ
Microbiology (Reading), 154 (Pt 1), 217-225
DOI 10.1099/mic.0.2007/010496-0, PubMed 18174140

Ambur OH, Frye SA, Tønjum T (2006)
New functional identity for the DNA uptake sequence in transformation and its presence in transcriptional terminators
J Bacteriol, 189 (5), 2077-85
DOI 10.1128/JB.01408-06, PubMed 17194793

Ambúr OH, Reynolds PE, Arias CA (2002)
D-Ala:D-Ala ligase gene flanking the vanC cluster: evidence for presence of three ligase genes in vancomycin-resistant Enterococcus gallinarum BM4174
Antimicrob Agents Chemother, 46 (1), 95-100
DOI 10.1128/AAC.46.1.95-100.2002, PubMed 11751117

Reynolds PE, Ambur OH, Casadewall B, Courvalin P (2001)
The VanY(D) DD-carboxypeptidase of Enterococcus faecium BM4339 is a penicillin-binding protein
Microbiology (Reading), 147 (Pt 9), 2571-2578
DOI 10.1099/00221287-147-9-2571, PubMed 11535797

Review articles

Ambur OH, Engelstädter J, Johnsen PJ, Miller EL, Rozen DE (2016)
Steady at the wheel: conservative sex and the benefits of bacterial transformation
Philos Trans R Soc Lond B Biol Sci, 371 (1706)
DOI 10.1098/rstb.2015.0528, PubMed 27619692

Ambur OH, Davidsen T, Frye SA, Balasingham SV, Lagesen K, Rognes T, Tønjum T (2009)
Genome dynamics in major bacterial pathogens
FEMS Microbiol Rev, 33 (3), 453-70
DOI 10.1111/j.1574-6976.2009.00173.x, PubMed 19396949