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Home / Archives for Paraskevis D

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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European Recommendations for the Clinical Use of HIV Drug Resistance Testing: 2011 Update.

  • Autores: 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, Walter H, Camacho RJ, Vandamme AM
  • 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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Appearance of a single amino acid insertion at position 33 in HIV type 1 protease under a lopinavir-containing regimen, associated with reduced protease inhibitor susceptibility.

  • Autores: Camacho RJ, Detsika MG, Hatzakis A, Imbrechts S, Lazanas M, Lu L, Magiorkinis E, Magiorkinis G, Molla A, Paraskevis D, Pilot-Matias T, Van Laethem K, Vandamme AM
  • Journal: AIDS Research and Human Retroviruses
  • Link: http://www.ncbi.nlm.nih.gov/pubmed/?term=Appearance+of+a+Single+Amino+Acid+Insertion+at+Position+33+in+HIV+Type+1+Protease+Under+a+Lopinavir-Containing+Regimen%2C+Associated+with+Reduced+Protease+Inhibitor+Susceptibility

HIV drug resistance is a multifactorial phenomenon and constitutes a major concern as it results in therapy failure. The aim of this study was to assess the impact of an amino acid insertion identified at position 33 of the protease gene, derived from samples from three patients under lopinavir therapy, on viral fitness and protease inhibitor (PI) resistance.
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Cellular HIV-1 DNA levels in drug sensitive strains are equivalent to those in drug resistant strains in newly-diagnosed patients in Europe

  • Autores: Balotta C, Clotet B, Demetriou VL, Grossman Z, Jørgensen LB, Kostrikis LG, Kousiappa I, Lepej SZ, Levy I, Nielsen C, Paraskevis D, Poljak M, Roman F, Ruiz L, Schmidt JC, Van de Vijver DA, Vercauteren J, Vandamme AM, Van Laethem K
  • Journal: PLoS One
  • Link: http://www.ncbi.nlm.nih.gov/pubmed/20544014

BACKGROUND:
HIV-1 genotypic drug resistance is an important threat to the success of antiretroviral therapy and transmitted resistance has reached 9% prevalence in Europe. Studies have demonstrated that HIV-1 DNA load in peripheral blood mononuclear cells (PBMC) have a predictive value for disease progression, independently of CD4 counts and plasma viral load.
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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 AMJ
  • 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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About GHTM

GHTM is a R&D Center that brings together researchers from IHMT with a track record in Tropical Medicine and International/Global Health. It aims at strengthening Portugal's role as a leading partner in the development and implementation of a global health research agenda. Our evidence-based interventions contribute to the promotion of equity in health and to improve the health of populations.

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