Title |
Interferon-γ inhibits group B Streptococcus survival within human endothelial cells
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Published in |
Memórias do Instituto Oswaldo Cruz, October 2014
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DOI | 10.1590/0074-0276140201 |
Pubmed ID | |
Authors |
Viviane de Oliveira Freitas Lione, Michelle Hanthequeste Bittencourt dos Santos, Jessica Silva Santos de Oliveira, Ana Luiza Mattos-Guaraldi, Prescilla Emy Nagao |
Abstract |
Endothelial dysfunction is a major component of the pathophysiology of septicaemic group B Streptococcus (GBS) infections. Although cytokines have been shown to activate human umbilical vein endothelial cells (HUVECs), the capacity of interferon (IFN)-γ to enhance the microbicidal activity of HUVECs against GBS has not been studied. We report that the viability of intracellular bacteria was reduced in HUVECs activated by IFN-γ. Enhanced fusion of lysosomes with bacteria-containing vacuoles was observed by acid phosphatase and the colocalisation of Rab-5, Rab-7 and lysosomal-associated membrane protein-1 with GBS in IFN-γ-activated HUVECs. IFN-γ resulted in an enhancement of the phagosome maturation process in HUVECs, improving the capacity to control the intracellular survival of GBS. |
X Demographics
Geographical breakdown
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Unknown | 1 | 100% |
Demographic breakdown
Type | Count | As % |
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Members of the public | 1 | 100% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
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Unknown | 17 | 100% |
Demographic breakdown
Readers by professional status | Count | As % |
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Student > Doctoral Student | 4 | 24% |
Student > Master | 4 | 24% |
Researcher | 2 | 12% |
Student > Ph. D. Student | 2 | 12% |
Other | 1 | 6% |
Other | 2 | 12% |
Unknown | 2 | 12% |
Readers by discipline | Count | As % |
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Immunology and Microbiology | 4 | 24% |
Medicine and Dentistry | 4 | 24% |
Agricultural and Biological Sciences | 4 | 24% |
Mathematics | 1 | 6% |
Business, Management and Accounting | 1 | 6% |
Other | 1 | 6% |
Unknown | 2 | 12% |