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Home / Archives for Sönnerborg A

Sönnerborg A

Limited cross-border infections in patients newly diagnosed with HIV in Europe

  • Autores: Abecasis AB, Albert J, Åsjö B, Balotta C, Beshkov D, Camacho RJ, Clotet B, Coughlan S, De Wit S, Frentz D, Griskevicius A, Grossman Z, Hamouda O, Horban A, Jørgensen LB, Kolupajeva T, Korn K, Kostrikis LG, Kücherer C, Liitsola K, Linka M, Nielsen C, Otelea D, Paraskevis D, Paredes R, Poljak M, Schmit JC, Sönnerborg A, Staneková D, Stanojevic M, Struck D, Vandamme AM, Wensing AMJ
  • Ano de Publicação: 2013
  • Journal: Retrovirology
  • Link: http://www.retrovirology.com/content/10/1/36

International travel plays a role in the spread of HIV-1 across Europe. It is, however, not known whether international travel is more important for spread of the epidemic as compared to endogenous infections within single countries. In this study, phylogenetic associations among HIV of newly diagnosed patients were determined across Europe.
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Declining prevalence of HIV-1 drug resistance in antiretroviral treatment-exposed individuals in Western Europe

  • Autores: Asboe D, Bansi L, Camacho R, Codoñer FM, De Luca A, Di Giambenedetto S, Dunn D, Fanti I, Ghisetti V, Kaiser R, Prosperi MCF, Sönnerborg A, Torti C, van de Vijver DC, Van Laethem K, Vandamme AM, Zazzi M
  • Ano de Publicação: 2013
  • Journal: Journal of Infectious Diseases
  • Link: http://jid.oxfordjournals.org/content/early/2013/01/11/infdis.jit017.abstract

HIV-1 drug resistance represents a major obstacle to infection and disease control. This retrospective study analyzes trends and determinants of resistance in antiretroviral treatment (ART)-exposed individuals across 7 countries in Europe. Of 20,323 cases, 80% carried at least one resistance mutation: these declined from 81% in 1997 to 71% in 2008. Predicted extensive 3-class resistance was rare (3.2% considering the cumulative genotype) and peaked at 4.5% in 2005, decreasing thereafter. The proportion of cases exhausting available drug options dropped from 32% in 2000 to 1% in 2008. Reduced risk of resistance over calendar years was confirmed by multivariable analysis.
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HIV-1 fitness landscape models for indinavir treatment pressure using observed evolution in longitudinal sequence data are predictive for treatment failure

  • Autores: Beheydt G, Bruzzone B, Camacho RJ, De Luca A, Deforche K, Grossman Z, Imbrechts S, Incardona F, Libin P, Pironti A, Rhee SY, Ruiz L, Sangeda RZ, Shafer RW, Sönnerborg A, Theys K, Torti C, Van de Vijver DA, Van Laethem K, Van Wijngaerden E, Vandamme AM, Vercauteren J, Zazzi M
  • Ano de Publicação: 2013
  • Journal: Infection Genetics and Evolution
  • Link: http://www.ncbi.nlm.nih.gov/pubmed/23523594

We previously modeled the in vivo evolution of human immunodeficiency virus-1 (HIV-1) under drug selective pressure from cross-sectional viral sequences. These fitness landscapes (FLs) were made by using first a Bayesian network (BN) to map epistatic substitutions, followed by scaling the fitness landscape based on an HIV evolution simulator trying to evolve the sequences from treatment naïve patients into sequences from patients failing treatment.
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Prediction of response to antiretroviral therapy by human experts and by the EuResist data-driven expert system (the EVE study).

  • Autores: Altmann A, Boucher CA, Brun-Vezinet F, Harrigan PR, Incardona F, Kaiser R, Lengauer T, Morris L, Obermeier M, Peres Y, Perno CF, Petroczi A, Phanuphak P, Pillay D, Prosperi M, Rosen-Zvi M, Schülter E, Shafer RW, Sönnerborg A, Struck D, Van Laethem K, Vandamme AM, Wensing AM, Zazzi M
  • Ano de Publicação: 2011
  • Journal: HIV medicine
  • Link: http://www.ncbi.nlm.nih.gov/pubmed/?term=Prediction+of+response+to+antiretroviral+therapy+by+human+experts+and+by+the+EuResist+data-driven+expert+system+(the+EVE+study).

OBJECTIVES:
The EuResist expert system is a novel data-driven online system for computing the probability of 8-week success for any given pair of HIV-1 genotype and combination antiretroviral therapy regimen plus optional patient information. The objective of this study was to compare the EuResist system vs. human experts (EVE) for the ability to predict response to treatment.
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European Recommendations for the Clinical Use of HIV Drug Resistance Testing: 2011 Update.

  • Autores: Camacho RJ, Ceccherini-Silberstein F, De Luca A, European HIV Drug Resistance Guidelines Panel, Palmisano L, Paraskevis D, Paredes R, Poljak M, Schmit JC, Sönnerborg A, Soriano V, Vandamme AM, Walter H
  • Ano de Publicação: 2011
  • Journal: Aids Reviews
  • Link: https://apps.webofknowledge.com/full_record.do?product=UA&search_mode=GeneralSearch&qid=19&SID=Y2ytOr2frNCuRlReLtM&page=1&doc=1

The European HIV Drug Resistance Guidelines Panel, established to make recommendations to clinicians and virologists, felt that sufficient new information has become available to warrant an update of its recommendations, explained in both pocket guidelines and this full paper.
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Treatment-associated polymorphisms in protease are significantly associated with higher viral load and lower CD4 count in newly diagnosed drug-naive HIV-1 infected patients.

  • Autores: Albert J, Åsjö B, Balotta C, Boucher CA, Bruckova M, Camacho RJ, Clotet B, Coughlan S, Deforche K, Grossman Z, Hamouda O, Horban A, Korn K, Kostrikis LG, Kücherer C, Libin P, Liitsola K, Nielsen C, Paraskevis D, Poljak M, Puchhammer-Stöckl E, Riva C, Ruiz L, Schmit JC, Schuurman R, Sönnerborg A, SPREAD-programme, Staneková D, Stanojevic M, Struck D, Theys K, Van de Vijver DA, Van Laethem K, Vandamme AM, Vercauteren J, Wensing AM
  • Ano de Publicação: 2012
  • Journal: Retrovirology
  • Link: http://www.ncbi.nlm.nih.gov/pubmed/?term=Treatment-associated+polymorphisms+in+protease+are+significantly+associated+with+higher+viral+load+and+lower+CD4+count+in+newly+diagnosed+drug-naive+HIV-1+infected+patients

BACKGROUND:
The effect of drug resistance transmission on disease progression in the newly infected patient is not well understood. Major drug resistance mutations severely impair viral fitness in a drug free environment, and therefore are expected to revert quickly. Compensatory mutations, often already polymorphic in wild-type viruses, do not tend to revert after transmission.
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Clinical Evaluation of Rega 8: An Updated Genotypic Interpretation System That Significantly Predicts HIV-Therapy Response

  • Autores: Beheydt G, Camacho R, Clotet B, De Luca A, Geretti AM, Grossman Z, Imbrechts S, Kaiser R, Libin P, Prosperi M, Schmit JC, Sönnerborg A, Torti C, Van Laethem K, Van Wijngaerden E, Vandamme AM, Vercauteren J, Zazzi M
  • Ano de Publicação: 2013
  • Journal: PLoS One
  • Link: http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0061436

Clinically evaluating genotypic interpretation systems is essential to provide optimal guidance in designing potent individualized HIV-regimens. This study aimed at investigating the ability of the latest Rega algorithm to predict virological response on a short and longer period.
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HIV-1 subtype is an independent predictor of reverse transcriptase mutation k65r in HIV-1 patients treated with combination antiretroviral therapy including tenofovir

  • Autores: Abecasis AB, Camacho RJ, Clotet B, De Luca A, Grossman Z, Schülter E, Snoeck J, Sönnerborg A, Struck D, Theys K, Torti C, Vandamme AM, Vercauteren J, Zazzi M
  • Ano de Publicação: 2013
  • Journal: Antimicrobial Agents and Chemotherapy
  • Link: http://www.ncbi.nlm.nih.gov/pubmed/23183438

Subtype-dependent selection of HIV-1 reverse transcriptase resistance mutation K65R was previously observed in cell culture and small clinical investigations. We compared K65R prevalence across subtypes A, B, C, F, G, and CRF02_AG separately in a cohort of 3,076 patients on combination therapy including tenofovir. K65R selection was significantly higher in HIV-1 subtype C. This could not be explained by clinical and demographic factors in multivariate analysis, suggesting subtype sequence-specific K65R pathways.
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HIV-1 sub- type distribution and its demographic determinants in newly diagnosed patients in Europe suggest highly compartmentalized epidemics

  • Autores: Abecasis AB, Albert J, Åsjö B, Balotta C, Beshkov D, Boucher CB, Camacho RJ, Clotet B, De Gascun C, Griskevicius A, Grossman Z, Hamouda O, Horban A, Kolupajeva T, Korn K, Kostrikis LG, Kücherer C, Liitsola K, Linka M, Nielsen C, Otelea D, Paraskevis D, Paredes R, Poljak M, Puchhammer-Stöckl E, Schmit JC, Sönnerborg A, Staneková D, Stanojevic M, Struck D, Theys K, Van de Vijver DMC, Vandamme AM, Vercauteren J, Wensing AMJ
  • Ano de Publicação: 2013
  • Journal: Retrovirology
  • Link: http://www.retrovirology.com/content/10/1/7

Understanding HIV-1 subtype distribution and epidemiology can assist preventive measures and clinical decisions. Sequence variation may affect antiviral drug resistance development, disease progression, evolutionary rates and transmission routes.
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Increase in transmitted resistance to non-nucleoside reverse transcriptase inhibitors among newly diagnosed HIV-1 infections in Europe

  • Autores: Abecasis AB, Albert J, Åsjö B, Balotta C, Beshkov D, Boucher CA, Camacho RJ, Clotet B, Coughlan S, Frentz D, Griskevicius A, Grossman Z, Hamouda O, Horban A, Jørgensen LB, Kolupajeva T, Korn K, Kostrikis LG, Kücherer C, Liitsola K, Linka M, Nielsen C, Otelea D, Paraskevis D, Paredes R, Poljak M, Puchhammer-Stöckl E, Schmit JC, Sönnerborg A, Staneková D, Stanojevic M, Struck D, Van de Vijver DA, Van Wijngaerden E, Vercauteren J, Wensing AM
  • Ano de Publicação: 2014
  • Journal: Bmc Infectious Diseases
  • Link: http://www.biomedcentral.com/1471-2334/14/407

One out of ten newly diagnosed patients in Europe was infected with a virus carrying a drug resistant mutation. We analysed the patterns over time for transmitted drug resistance mutations (TDRM) using data from the European Spread program.
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