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1.
J Med Virol ; 89(11): 2020-2028, 2017 11.
Article in English | MEDLINE | ID: mdl-28617968

ABSTRACT

HHV-8 genotypes are distributed heterogeneously worldwide. The variable K1 gene and the conserved ORF26E region serve to genotype. The aim of the study was to characterize HHV-8 isolates from patients with AIDS, classical, and iatrogenic KS, primary effusion lymphoma and Castleman's disease and one organ donor from Argentina by analysis of ORFK1 and ORF26E regions. DNA was extracted from fresh or paraffin embedded biopsies, blood, and saliva samples and submitted to HHV-8 PCR. Phylogenetic analyses of ORFK1 showed that subtypes C (C1, C2, and C3), B1 and A (A1, A2, and A3) were present in 70.8%, 16.7%, and 12.5% of cases, respectively. Analyses of ORF26E fragment revealed that most strains (45.8%) were subtype A/C while the remaining fall into K, J, B2, R, and D subtypes. Linkage between ORFK1-ORF26E subtypes corresponded to reported relationships, except for one strain that clustered with B1 (K1 African) and D (ORF26E Asian-Pacific) subtypes. This research reveals predominance of subtype C, a broad spectrum of HHV-8 genotypes and reports the first isolation of the African B genotype in Argentina.


Subject(s)
Acquired Immunodeficiency Syndrome/virology , Castleman Disease/virology , Genetic Variation , Herpesvirus 8, Human/genetics , Lymphoma, Primary Effusion/virology , Sarcoma, Kaposi/virology , Acquired Immunodeficiency Syndrome/complications , Acquired Immunodeficiency Syndrome/epidemiology , Adult , Aged , Argentina/epidemiology , Castleman Disease/epidemiology , DNA, Viral/genetics , Evolution, Molecular , Female , Genotype , Herpesvirus 8, Human/classification , Herpesvirus 8, Human/isolation & purification , Humans , Lymphoma, Primary Effusion/epidemiology , Male , Middle Aged , Phylogeny , Polymerase Chain Reaction , Saliva/virology , Sarcoma, Kaposi/blood , Sarcoma, Kaposi/epidemiology , Tissue Donors
2.
PLoS One ; 7(12): e51068, 2012.
Article in English | MEDLINE | ID: mdl-23251423

ABSTRACT

Influenza virus (InfV) infection during pregnancy is a known risk factor for neurodevelopment abnormalities in the offspring, including the risk of schizophrenia, and has been shown to result in an abnormal behavioral phenotype in mice. However, previous reports have concentrated on neuroadapted influenza strains, whereas increased schizophrenia risk is associated with common respiratory InfV. In addition, no specific mechanism has been proposed for the actions of maternal infection on the developing brain that could account for schizophrenia risk. We identified two common isolates from the community with antigenic configurations H3N2 and H1N1 and compared their effects on developing brain with a mouse modified-strain A/WSN/33 specifically on the developing of dopaminergic neurons. We found that H1N1 InfV have high affinity for dopaminergic neurons in vitro, leading to nuclear factor kappa B activation and apoptosis. Furthermore, prenatal infection of mothers with the same strains results in loss of dopaminergic neurons in the offspring, and in an abnormal behavioral phenotype. We propose that the well-known contribution of InfV to risk of schizophrenia during development may involve a similar specific mechanism and discuss evidence from the literature in relation to this hypothesis.


Subject(s)
Brain/virology , Dopaminergic Neurons/virology , Influenza A Virus, H1N1 Subtype , Influenza A Virus, H3N2 Subtype , Orthomyxoviridae Infections/virology , Prenatal Exposure Delayed Effects/virology , Schizophrenia/virology , Animals , Behavior, Animal/physiology , Brain/immunology , Brain/physiopathology , Cells, Cultured , Disease Models, Animal , Female , Maze Learning/physiology , Mice , Orthomyxoviridae Infections/immunology , Orthomyxoviridae Infections/physiopathology , Pregnancy , Prenatal Exposure Delayed Effects/immunology , Prenatal Exposure Delayed Effects/physiopathology , Recognition, Psychology/physiology
4.
Medicina (B.Aires) ; 58(1): 1-7, 1998. tab, graf
Article in Spanish | LILACS | ID: lil-212353

ABSTRACT

Escherichia coli productor de toxina Shiga (STEC) ha sido asociado con la etiopatogenia del síndrome urémico hemolítico (SUH). El objetivo fue caracterizar los casos de SUH observados en Mendoza y determinar su asociación con la infección por STEC. Entre el 1º de Julio de 1994 y el 30 de Junio de 1996 ingresaron al Hospital Pediátrico "Dr. HJ Notti", 36 pacientes con diagnóstico de SUH. La edad promedio fue de 22.8 meses, con un 44 por ciento en el sexo femenino. La enfermedad se estableció después de un período prodrómico de 4.5 días, el 94.4 por ciento de los pacientes presentó diarrea siendo sanguinolenta en el 83.3 por ciento de los casos. El 69.4 por ciento recibió antibioticoterapia antes de su ingreso. Los casos se presentaron fundamentalmente en niños eutróficos (88.9 por ciento), de condición socioeconómica media-baja (91.7 por ciento) de origem urbano (72.2 por ciento), durante el verano y principios de otoño. En el período de estado los pacientes presentaron palidez (100 por ciento), edema (25 por ciento), anuria (38.9 por ciento), oliguria (41.7 por ciento), anemia hemolítica (97.2 por ciento), trombocitopenia (86.1 por ciento) y compromiso neurológico (41.7 por ciento). Veinticinco pacientes presentaron formas completas de SUH. El 50 por ciento de los pacientes fue dializado y el 88.9 por ciento requirió transfusión de sedimento globular. El promedio de días de internación fue de 15.1. El 91.7 por ciento de los pacientes recuperó la función renal, dos pacientes evolucionaron a insuficiencia renal crónica y uno falleció. Evidencias acumulativas de infección por STEC se encontraron en 19 (86.4 por ciento) de 22 pacientes, STEC del serotipo 0157:H7, biotipo C fue detectado en 8 casos (36.4 por ciento). Stx2 fue la citotoxina prevalente en STEC, en materia fecal (STMF) y anticuerpos a-Stx.


Subject(s)
Humans , Male , Female , Infant , Child, Preschool , Child , Bacterial Toxins , Escherichia coli , Escherichia coli Infections/complications , Hemolytic-Uremic Syndrome/microbiology , Argentina , Hemolytic-Uremic Syndrome/drug therapy , Hemolytic-Uremic Syndrome/epidemiology , Nutritional Status , Socioeconomic Factors
5.
Medicina [B.Aires] ; 58(1): 1-7, 1998. tab, gra
Article in Spanish | BINACIS | ID: bin-18863

ABSTRACT

Escherichia coli productor de toxina Shiga (STEC) ha sido asociado con la etiopatogenia del síndrome urémico hemolítico (SUH). El objetivo fue caracterizar los casos de SUH observados en Mendoza y determinar su asociación con la infección por STEC. Entre el 1º de Julio de 1994 y el 30 de Junio de 1996 ingresaron al Hospital Pediátrico "Dr. HJ Notti", 36 pacientes con diagnóstico de SUH. La edad promedio fue de 22.8 meses, con un 44 por ciento en el sexo femenino. La enfermedad se estableció después de un perío


Subject(s)
Humans , Male , Female , Infant , Child, Preschool , Child , Hemolytic-Uremic Syndrome/microbiology , Escherichia coli Infections/complications , Bacterial Toxins , Escherichia coli , Hemolytic-Uremic Syndrome/epidemiology , Hemolytic-Uremic Syndrome/drug therapy , Argentina , Nutritional Status , Socioeconomic Factors
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