Mycoplasma Penetrans
Mostrando 1-12 de 25 artigos, teses e dissertações.
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1. Caracterização de proteinas imunodominantes de Mycoplasma penetrans e Mycoplasma fermentans
Micoplasmas são procariotos diminutos, desprovidos de parede celular e envoltos por uma membrana lipoproteica cujo pequeno genoma sintetiza a maioria das moléculas necessárias para crescimento e replicação. Dentre as dezesseis espécies isoladas do homem, Mycoplasma pneumoniae, agente causador da pneumonia atípica primária, e as espécies do trato uro
Brazilian Journal of Microbiology. Publicado em: 2005-06
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2. Detecção de Mycoplasma genitalium, M. fermentans e M. penetrans em pacientes com sintomas de uretrite e em indivíduos infectados pelo HIV-1 no Brasil
Neste trabalho investigamos a prevalência de três espécies de micoplasma recém-identificadas como patógenos humanos, M. genitalium, implicado em casos de uretrite não-gonocócica, e M. fermentans e M. penetrans, isolados de pacientes imunodeprimidos, e das duas espécies mais freqüentes no trato geniturinário, M. hominis e U. urealyticum. Foram estud
Jornal Brasileiro de Patologia e Medicina Laboratorial. Publicado em: 2002
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3. In vitro influence of Mycoplasma penetrans on activation of peripheral T lymphocytes from healthy donors or human immunodeficiency virus-infected individuals.
Mycoplasma penetrans is a mycoplasma species newly isolated from the urine of human immunodeficiency virus (HIV)-infected individuals and presents the only case in which an association has been found between antibodies against a mycoplasma and HIV infection. To further explore the effects of M. penetrans on the immune system, we studied the influence of this
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4. Hemolytic and Hemoxidative Activities in Mycoplasma penetrans
Mycoplasma penetrans is a newly isolated Mollicute from the urine of patients infected with human immunodeficiency virus that demonstrates the capacity to adhere to and invade human cells. A previous report, based on assays with mouse red blood cells (RBCs), indicated that M. penetrans lacked hemolytic activity. In our studies, we incubated different isolate
American Society for Microbiology.
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5. Adherence, fibronectin binding, and induction of cytoskeleton reorganization in cultured human cells by Mycoplasma penetrans.
Mycoplasma penetrans adhered to cultured human cells, forming clusters that localized to specific areas of the host cell surface. Adherence and cluster formation were inhibited by anti-M. penetrans antibodies, suggesting the involvement of specific adhesin-receptor interactions. Ultrastructural studies showed that after 2 h of infection, mycoplasmas attach t
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6. Mycoplasma penetrans and Other Mycoplasmas in Urine of Human Immunodeficiency Virus-Positive Children
Urine samples from children with human immunodeficiency virus (HIV) infection and healthy controls were examined for mycoplasmas by culture. Standard biochemical assays, sodium dodecyl sulfate-polyacrylamide gel electrophoresis, and PCR (16S and 16S-23S spacer rRNA region) were used for identification of isolates. Mycoplasmas were identified from 13 (87%) of
American Society for Microbiology.
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7. Mycoplasma penetrans Is Capable of Activating Vγ9/Vδ2 T Cells While Other Human Pathogenic Mycoplasmas Fail To Do So
While most mycoplasma species appear to have evolutionarily lost the ability to synthesize isoprenoid precursors, Mycoplasma penetrans has retained the nonmevalonate pathway that proceeds via the immunogenic intermediate (E)-4-hydroxy-3-methyl-but-2-enyl pyrophosphate (HMB-PP). Consequently, this pathogen is capable of stimulating human Vγ9/Vδ2 T cells.
American Society for Microbiology.
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8. High prevalence of antibodies to Mycoplasma penetrans in human immunodeficiency virus-seronegative and -seropositive populations in Brazzaville, Congo.
In industrialized countries, the prevalence of antibodies to Mycoplasma penetrans is higher among human immunodeficiency virus (HIV)-seropositive homosexuals than other HIV-seropositive and HIV-seronegative groups. In an African heterosexual population, we found a higher prevalence of M. penetrans antibodies in HIV-seronegative blood donors (15.5%) than in F
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9. Multiple Promoter Inversions Generate Surface Antigenic Variation in Mycoplasma penetrans
Mycoplasma penetrans is a newly identified species of the genus Mycoplasma. It was first isolated from a urine sample from a human immunodeficiency virus (HIV)-infected patient. M. penetrans changes its surface antigen profile with high frequency. The changes originate from ON↔OFF phase variations of the P35 family of surface membrane lipoproteins. The P35
American Society for Microbiology.
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10. The complete genomic sequence of Mycoplasma penetrans, an intracellular bacterial pathogen in humans
The complete genomic sequence of an intracellular bacterial pathogen, Mycoplasma penetrans HF-2 strain, was determined. The HF-2 genome consists of a 1 358 633 bp single circular chromosome containing 1038 predicted coding sequences (CDSs), one set of rRNA genes and 30 tRNA genes. Among the 1038 CDSs, 264 predicted proteins are common to the Mycoplasmataceae
Oxford University Press.
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11. Pathogenicity of Mycoplasma fermentans and Mycoplasma penetrans in experimentally infected chicken embryos.
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12. Phase Variations of the Mycoplasma penetrans Main Surface Lipoprotein Increase Antigenic Diversity
Mycoplasma penetrans is a recently identified mycoplasma, isolated from urine samples collected from human immunodeficiency virus (HIV)-infected patients. Its presence is significantly associated with HIV infection. The major antigen recognized during natural and experimental infections is an abundant P35 lipoprotein which, upon extraction, segregates in the
American Society for Microbiology.