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Chlamydia trachomatis -induced apoptosis occurs in uninfected McCoy cells late in the developmental cycle and is regulated by the intracellular redox state
Linköping University, Department of Molecular and Clinical Medicine, Clinical Microbiology. Linköping University, Faculty of Health Sciences.
Linköping University, Department of Neuroscience and Locomotion, Pathology. Linköping University, Faculty of Health Sciences.ORCID iD: 0000-0003-4075-159X
Linköping University, Department of Molecular and Clinical Medicine, Clinical Immunology. Linköping University, Faculty of Health Sciences.
Linköping University, Department of Biomedicine and Surgery, Oncology. Linköping University, Faculty of Health Sciences.
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2001 (English)In: Microbial Pathogenesis, ISSN 0882-4010, E-ISSN 1096-1208, Vol. 31, no 4, 173-184 p.Article in journal (Refereed) Published
Abstract [en]

Infections with the obligate intracellular bacterium Chlamydia trachomatis are characterized by avoidance of fusion between chlamydia-containing endosomes and lysosomes, bacterial persistence and development of post-infectious sequelae. In this report we show that C. trachomatis induces apoptosis in McCoy and HeLa cells. Apoptosis was monitored by three different techniques; enzyme-linked immunoassay (EIA) of fragmented nucleosomes, terminal deoxynucleotidyl transferase-mediated dUTP nick end labelling (TUNEL) and flow cytometry of propidium iodide-stained cells. Apoptosis occurred in uninfected cells, was induced late in the chlamydial developmental cycle, beyond 24 h post-infection and was dependent on bacterial protein synthesis. Apoptosis was not significantly increased in infected, inclusion-containing cells. Treatment of cells with the antioxidants ascorbic acid (10 μM) and α-tocopherol (10 μM) reduced the degree of apoptosis. These results suggest that host cells infected with C. trachomatis generate proapoptotic stimuli that induce apoptosis in uninfected, neighbouring cells and that the redox state of the cell is a regulator in chlamydia-induced apoptosis.

Place, publisher, year, edition, pages
2001. Vol. 31, no 4, 173-184 p.
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Medical and Health Sciences
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URN: urn:nbn:se:liu:diva-25989DOI: 10.1006/mpat.2001.0460Local ID: 10441OAI: oai:DiVA.org:liu-25989DiVA: diva2:246537
Available from: 2009-10-08 Created: 2009-10-08 Last updated: 2017-12-13Bibliographically approved

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Schöier, JohanÖllinger, KarinKvarnström, MariaKihlström, Erik

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