Inhibited proliferation of human periodontal ligament cells and gingival fibroblasts by Actinobacillus actinomycetemcomitans : involvement of the cytolethal distending toxin
Actinobacillus actinomycetemcomitans can inhibit fibroblast proliferation. The objective of this study was to characterize the early proliferative responses of human periodontal ligament cells (PDLC) and gingival fibroblasts (GF) to A. actinomycetemcomitans components and to investigate the possible involvement of the cytolethal distending toxin (cdt) produced by this bacterium. The PDLC and GF were challenged with surface components of A. actinomycetemcomitans. Both DNA and protein synthesis as well as cell lysis or apoptosis were assayed for a 6-h period after addition of the bacterial extract. Unlike the controls, inhibition of DNA synthesis had already occurred in the challenged cells at the end of the initial 3- to 6-h period. No lysis or apoptosis was detected, and the total protein synthesis remained unaffected. The persistence of the effect on cell growth was confirmed after a 72-h period of challenge, during which the cells remained viable but exhibited an elongated and distended cell body. No significant differences were observed between PDLC and GF. When a cdt-knockout strain of A. actinomycetemcomitans was used almost no inhibitory effect on cell proliferation was observed. It was concluded that A. actinomycetemcomitans causes a non-lethal inhibition of proliferation in PDLC and GF as a result of an early arrest of DNA synthesis. Cytolethal distending toxin is responsible for most of this effect. This bacterial property may compromise tissue homeostasis in the periodontium.
| Medienart: |
Artikel |
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| Erscheinungsjahr: |
2002 |
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| Erschienen: |
2002 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:110 |
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| Enthalten in: |
European journal of oral sciences - 110(2002), 5 vom: 31. Okt., Seite 366-73 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Belibasakis, Georgios [VerfasserIn] |
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| Themen: |
9007-49-2 |
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| Anmerkungen: |
Date Completed 27.05.2003 Date Revised 07.11.2019 published: Print Citation Status MEDLINE |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM124375006 |
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| 100 | 1 | |a Belibasakis, Georgios |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Inhibited proliferation of human periodontal ligament cells and gingival fibroblasts by Actinobacillus actinomycetemcomitans |b involvement of the cytolethal distending toxin |
| 264 | 1 | |c 2002 | |
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a ohne Hilfsmittel zu benutzen |b n |2 rdamedia | ||
| 338 | |a Band |b nc |2 rdacarrier | ||
| 500 | |a Date Completed 27.05.2003 | ||
| 500 | |a Date Revised 07.11.2019 | ||
| 500 | |a published: Print | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a Actinobacillus actinomycetemcomitans can inhibit fibroblast proliferation. The objective of this study was to characterize the early proliferative responses of human periodontal ligament cells (PDLC) and gingival fibroblasts (GF) to A. actinomycetemcomitans components and to investigate the possible involvement of the cytolethal distending toxin (cdt) produced by this bacterium. The PDLC and GF were challenged with surface components of A. actinomycetemcomitans. Both DNA and protein synthesis as well as cell lysis or apoptosis were assayed for a 6-h period after addition of the bacterial extract. Unlike the controls, inhibition of DNA synthesis had already occurred in the challenged cells at the end of the initial 3- to 6-h period. No lysis or apoptosis was detected, and the total protein synthesis remained unaffected. The persistence of the effect on cell growth was confirmed after a 72-h period of challenge, during which the cells remained viable but exhibited an elongated and distended cell body. No significant differences were observed between PDLC and GF. When a cdt-knockout strain of A. actinomycetemcomitans was used almost no inhibitory effect on cell proliferation was observed. It was concluded that A. actinomycetemcomitans causes a non-lethal inhibition of proliferation in PDLC and GF as a result of an early arrest of DNA synthesis. Cytolethal distending toxin is responsible for most of this effect. This bacterial property may compromise tissue homeostasis in the periodontium | ||
| 650 | 4 | |a Journal Article | |
| 650 | 7 | |a Bacterial Toxins |2 NLM | |
| 650 | 7 | |a Protein Subunits |2 NLM | |
| 650 | 7 | |a cytolethal distending toxin, Actinobacillus actinomycetemcomitans |2 NLM | |
| 650 | 7 | |a DNA |2 NLM | |
| 650 | 7 | |a 9007-49-2 |2 NLM | |
| 700 | 1 | |a Johansson, Anders |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Ying |e verfasserin |4 aut | |
| 700 | 1 | |a Claesson, Rolf |e verfasserin |4 aut | |
| 700 | 1 | |a Chen, Casey |e verfasserin |4 aut | |
| 700 | 1 | |a Asikainen, Sirkka |e verfasserin |4 aut | |
| 700 | 1 | |a Kalfas, Sotirios |e verfasserin |4 aut | |
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