Search results for "hiv-1"
showing 7 items of 177 documents
Metodo per la genotipizzazione di HIV-1 e relativi kit diagnostici per la rilevazione di farmaco-resistenza (gene ENV-gp41).
2007
DESCRIPTION OF THE INVENTION This invention concerns a laboratory method for genotyping human immunodeficiency virus type 1 (HIV-1) through gene sequencing of gp41-env. It allows to detect the nucleotide mutations conferring resistance to antiretroviral drugs active to gp41-env. The present method allows to analyze also low viraemia samples at around 101 -102 copies HIV-RNA/ml. This method offers the advantage of being easily adaptable to both plasma and cellular samples and is therefore able to value "in advance" the genetic mutations potentially involved in the resistance phenomena to anti-retroviral drugs, even in patients with optimal/sub-optimal virologic control. The kit use the one-s…
Metodo per la genotipizzazione di HIV-1 e relativi kit diagnostici per la rilevazione di farmaco-resistenza (geni GAG/POL).
2007
DESCRIPTION OF THE INVENTION This invention concerns a laboratory method for genotyping human immunodeficiency virus type 1 (HIV-1) through gene sequencing of pol. It allows to detect the nucleotide mutations conferring resistance to antiretroviral drugs active to pol. The present method allows to analyze also low viraemia samples at around 101 -102 copies HIV-RNA/ml. This method offers the advantage of being easily adaptable to both plasma and cellular samples and is therefore able to value "in advance" the genetic mutations potentially involved in the resistance phenomena to anti-retroviral drugs, even in patients with optimal/sub-optimal virologic control. The kit use the one-step RT-PCR…
Il ruolo dell’immigrazione nelle dinamiche dell’epidemiologia molecolare del virus HIV-1: analisi filo-geografica di varianti virali non-B in individ…
2011
Obiettivi Sebbene il subtipo B di HIV-1 sia prevalente in Europa Occidentale, virus ascrivibili ai genotipi non-B stanno rapidamente diffondendosi in questa area geografica, specialmente a causa dai flussi immigratori da regioni endemiche. La Sicilia, vista la sua posizione centrale nel bacino del Mediterraneo, rappresenta una delle principali porte di ingresso per i migranti in Europa, in particolare dall’Europa orientale, dall’Africa e dal sud-est asiatico. L’obiettivo del presente studio è stato valutare la prevalenza, le caratteristiche molecolari e le dinamiche geografiche di varianti virali di HIV-1 non ascrivibili al subtipo B in una coorte di individui infetti non sottoposti a terap…
Screening for inhibitors of HIV gp120-CD4 binding using an enzyme-linked immunoabsorbent assay.
1993
Binding of the HIV-1 major viral surface glycoprotein, gp120, to the major cell receptor, CD4, is essential for HIV infection of the target cell and syncytium formation. An enzyme-linked immunoassay using solid phase CD4 was used to quantitate the binding of HIV-1 gp120 to CD4, and to assess the activity and mechanism of action of putative inhibitors of that reaction. Monoclonal antibodies to the gp120 binding site on CD4 (e.g., Leu3a) blocked gp120 binding, while monoclonal antibodies to other portions of CD4 (e.g. OKT4) did not. Both aurintricarboxylic acid and sulfonated polysaccharides (e.g., dextran sulfate) blocked CD4-gp120 interactions by binding to the CD4 component. Human polyclon…
Molecular Surveillance of HIV-1 in Madrid, Spain: a Phylogeographic Analysis ▿
2011
ABSTRACT The molecular epidemiology of HIV-1 is constantly changing, mainly as a result of human migratory flows and the high adaptive ability of the virus. In recent years, Spain has become one of Europe's main destinations for immigrants and one of the western European countries with the highest rates of HIV-positive patients. Using a phylogeographic approach, we have analyzed the relationship between HIV-1 variants detected in immigrant and native populations of the urban area of Madrid. Our project was based on two coincidental facts. First, resistance tests were extended to naïve and newly diagnosed patients, and second, the Spanish government legislated the provision of legal status t…
Die Lungentuberkulose – aktuelle radiologische Diagnostik einer alten Krankheit
2000
Inzidenz. Abnehmende Inzidenzen aktiver Tuberkulose in den Industrielandern haben diese Erkrankung aus dem Bewusstsein vieler verdrangt. Dennoch stellt die Tuberkulose weiterhin weltweit die am haufigsten zum Tode fuhrende Infektionskrankheit dar. In den Industrielandern tragen Faktoren wie Einwanderungsbewegungen, zunehmende Verarmung und die Zunahme immunsupprimierter Patienten, insbesondere durch die HIV-Epidemie, dazu bei, dass ein Reservoir fur die Tuberkulose aufrecht erhalten wird. Diagnose. Eine fruhzeitige Diagnose ist wegen der spezifischen Therapiemoglichkeiten entscheidend fur den Krankheitsverlauf; im Falle von multiresistenten Stammen ist sie wichtig zur Verhinderung einer wei…
[60]Fullerene l -Amino Acids and Peptides: Synthesis under Phase-Transfer Catalysis Using a Phosphine–Borane Linker. Electrochemical Behavior
2017
International audience; A new method to link amino acid and peptide derivatives to [60]fullerene is described. It uses hydrophosphination with a secondary phosphine borane. First, the stereoselective synthesis of secondary phosphine borane amino acid derivatives was achieved by alkylation of phenylphosphine borane with gamma-iodo-alpha-amino ester reagents under phase transfer catalysis (PTC). Second, a sec-phosphine borane amino ester was saponified and coupled with alpha,gamma-diamino esters to afford the corresponding dipeptide derivatives in good yields. Finally, the hydrophosphination reaction of [60]fullerene by the sec-phosphine borane compounds was performed under PTC to obtain C-60…