ABSTRACT
Se estudiaron 204 mujeres de la ciudad de Buenos Aires, con el objeto de determinar los factores de riesgo de infección por el virus de la inmunodeficiencia humana tipo 1. Se recogieron datos epidemiológicos sobre factores de riesgo y se realizó un estudio serológico en muestras de sangre tomadas en el momento de la admisión. Las mujeres adictas a drogas por vía endovenosa tuvieron una tasa de infección del 65,85 por ciento, 8 veces superior al de las no adictas; esta tasa se elevó al 90,62 por ciento en aquellas mujeres que además tenían contactos sexuales con hombres seropositivos para el virus de la inmunodeficiencia humana tipo 1. En 7 casos registrados de transfusión sanguínea como único factor de riesgo reconocido, uno solo fue seropositivo. En este estudio, de las 64 pacientes con serología positiva el 84,37 por ciento de ellas eran drogadictas endovenosas, confirmando nuevamente que la drogadicción endovenosa fue el factor de mayor riesgo de infección por el virus de la inmunodeficiencia humana tipo 1
Subject(s)
Humans , Female , Adolescent , Adult , Middle Aged , HIV Infections/diagnosis , Risk Factors , Acquired Immunodeficiency Syndrome/epidemiology , Substance-Related Disorders/complications , Women , HIV Infections/transmission , Sexually Transmitted Diseases/diagnosis , Sexually Transmitted Diseases/epidemiology , Acquired Immunodeficiency Syndrome/diagnosis , Acquired Immunodeficiency Syndrome/blood , Substance-Related Disorders/epidemiologyABSTRACT
The main goal of the present paper was to analyze the molecular diversity of the principal neutralizing domain (V3 loop) of the HIV 1 gp120 in samples from patients of Argentina. The study was carried out on a total of 30 HIV 1 positive blood samples, obtained during 1991-1992, belonging to 15 intravenous drug users (group A), 5 homosexual men (group B), 8 children born to HIV 1 positive mothers (group C) and 2 AIDS patients (group D). By using extracted DNA from peripheral blood lymphocytes and from infected cells of the viral isolates in the case of the 2 AIDS patients, the V3 loop region was amplified by means of polymerase chain reaction. Direct sequencing by Sanger methodology was then performed on DNA fragments and nucleotide sequences obtained were translated into the correspondent amino acids. Consensus sequences for each group and a general consensus sequence were established (Table 1). Its alignment with V3 loop amino acid sequences of the major HIV 1 strains isolated worldwide is showed in table 2. Homology analysis between each sequence of the study population and sequence of different HIV 1 isolates showed that most of these samples share high homology with SF2 and BH10 strains. In contrast a low homology was found with JH3 and MN isolated (table 3). The presence of highly conserved amino acid residues as substitutions and insertions was determined in the Argentinian V3 loop sequences giving them a local pattern. The present paper is of great importance for our country, considering that the V3 loop is the main neutralizing domain becoming a major target in the development of HIV 1 vaccine. To our knowledge, this is the first report on the sequencing of the principal neutralizing domain of the Human Immunodeficiency Virus type 1 in Latin America.
ABSTRACT
The main goal of the present paper was to analyze the molecular diversity of the principal neutralizing domain (V3 loop) of the HIV 1 gp120 in samples from patients of Argentina. The study was carried out on a total of 30 HIV 1 positive blood samples, obtained during 1991-1992, belonging to 15 intravenous drug users (group A), 5 homosexual men (group B), 8 children born to HIV 1 positive mothers (group C) and 2 AIDS patients (group D). By using extracted DNA from peripheral blood lymphocytes and from infected cells of the viral isolates in the case of the 2 AIDS patients, the V3 loop region was amplified by means of polymerase chain reaction. Direct sequencing by Sanger methodology was then performed on DNA fragments and nucleotide sequences obtained were translated into the correspondent amino acids. Consensus sequences for each group and a general consensus sequence were established (Table 1). Its alignment with V3 loop amino acid sequences of the major HIV 1 strains isolated worldwide is showed in table 2. Homology analysis between each sequence of the study population and sequence of different HIV 1 isolates showed that most of these samples share high homology with SF2 and BH10 strains. In contrast a low homology was found with JH3 and MN isolated (table 3). The presence of highly conserved amino acid residues as substitutions and insertions was determined in the Argentinian V3 loop sequences giving them a local pattern. The present paper is of great importance for our country, considering that the V3 loop is the main neutralizing domain becoming a major target in the development of HIV 1 vaccine. To our knowledge, this is the first report on the sequencing of the principal neutralizing domain of the Human Immunodeficiency Virus type 1 in Latin America.