Abstract
Mature dendritic cells (DCs) were generated by culturing human peripheral blood monocytes for 7 days and, then, treating them with a cytokine cocktail for 2 days. The viability of the mature DCs (Day 9) obtained was approximately 60-70%, and this gradually declined when they were recultured in X-VIVO 15 media containing 2% human plasma (40% viability after 3 days of reculture). DC death accelerated on withdrawing plasma from the culture (20% viability after 3 days). However, the addition of tumor necrosis factor-α (TNF-α) to the medium completely restored DC viability in the absence of plasma. Such a protective effect was not afforded by other cytokines, such as granulocyte-macrophage colony-stimulating factor (GM-CSF), interleukin-1α (IL-1α), IL-4, IL-6 and prostaglandin E2 which are used for the maturation of DCs. These results indicate that TNF-α is specifically required to maintain the viability of mature DCs. The withdrawal of plasma rapidly (within 15 min elevated cellular levels of reactive oxygen intermediates (ROIs), which have been proposed to regulate the ability of DCs to control inflammatory reactions. The possibility that ROIs act as mediators of DC death was eliminated by the observation that scavengers of ROIs, such as catalase, N-acetylcysteine, glutathione, failed to prolong DC life span in the absence of plasma. Interestingly, TNF-α was found to almost completely abolish the production of ROIs induced by plasma withdrawal. To summarize, our results suggest that TNF-α controls not only the inflammatory functions of DCs but also their survival.
| Original language | English |
|---|---|
| Pages (from-to) | 282-288 |
| Number of pages | 7 |
| Journal | Experimental dermatology |
| Volume | 13 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2004 May 1 |
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All Science Journal Classification (ASJC) codes
- Biochemistry
- Molecular Biology
- Dermatology
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TNF-α suppresses dendritic cell death and the production of reactive oxygen intermediates induced by plasma withdrawal. / Um, Hong Duck; Cho, Young Hun; Kim, Do Kyun; Shin, Jong Ran; Lee, Yung Jae; Choi, Kwang Sung; Kang, Jin Moon; Lee, Min Geol.
In: Experimental dermatology, Vol. 13, No. 5, 01.05.2004, p. 282-288.Research output: Contribution to journal › Article
TY - JOUR
T1 - TNF-α suppresses dendritic cell death and the production of reactive oxygen intermediates induced by plasma withdrawal
AU - Um, Hong Duck
AU - Cho, Young Hun
AU - Kim, Do Kyun
AU - Shin, Jong Ran
AU - Lee, Yung Jae
AU - Choi, Kwang Sung
AU - Kang, Jin Moon
AU - Lee, Min Geol
PY - 2004/5/1
Y1 - 2004/5/1
N2 - Mature dendritic cells (DCs) were generated by culturing human peripheral blood monocytes for 7 days and, then, treating them with a cytokine cocktail for 2 days. The viability of the mature DCs (Day 9) obtained was approximately 60-70%, and this gradually declined when they were recultured in X-VIVO 15 media containing 2% human plasma (40% viability after 3 days of reculture). DC death accelerated on withdrawing plasma from the culture (20% viability after 3 days). However, the addition of tumor necrosis factor-α (TNF-α) to the medium completely restored DC viability in the absence of plasma. Such a protective effect was not afforded by other cytokines, such as granulocyte-macrophage colony-stimulating factor (GM-CSF), interleukin-1α (IL-1α), IL-4, IL-6 and prostaglandin E2 which are used for the maturation of DCs. These results indicate that TNF-α is specifically required to maintain the viability of mature DCs. The withdrawal of plasma rapidly (within 15 min elevated cellular levels of reactive oxygen intermediates (ROIs), which have been proposed to regulate the ability of DCs to control inflammatory reactions. The possibility that ROIs act as mediators of DC death was eliminated by the observation that scavengers of ROIs, such as catalase, N-acetylcysteine, glutathione, failed to prolong DC life span in the absence of plasma. Interestingly, TNF-α was found to almost completely abolish the production of ROIs induced by plasma withdrawal. To summarize, our results suggest that TNF-α controls not only the inflammatory functions of DCs but also their survival.
AB - Mature dendritic cells (DCs) were generated by culturing human peripheral blood monocytes for 7 days and, then, treating them with a cytokine cocktail for 2 days. The viability of the mature DCs (Day 9) obtained was approximately 60-70%, and this gradually declined when they were recultured in X-VIVO 15 media containing 2% human plasma (40% viability after 3 days of reculture). DC death accelerated on withdrawing plasma from the culture (20% viability after 3 days). However, the addition of tumor necrosis factor-α (TNF-α) to the medium completely restored DC viability in the absence of plasma. Such a protective effect was not afforded by other cytokines, such as granulocyte-macrophage colony-stimulating factor (GM-CSF), interleukin-1α (IL-1α), IL-4, IL-6 and prostaglandin E2 which are used for the maturation of DCs. These results indicate that TNF-α is specifically required to maintain the viability of mature DCs. The withdrawal of plasma rapidly (within 15 min elevated cellular levels of reactive oxygen intermediates (ROIs), which have been proposed to regulate the ability of DCs to control inflammatory reactions. The possibility that ROIs act as mediators of DC death was eliminated by the observation that scavengers of ROIs, such as catalase, N-acetylcysteine, glutathione, failed to prolong DC life span in the absence of plasma. Interestingly, TNF-α was found to almost completely abolish the production of ROIs induced by plasma withdrawal. To summarize, our results suggest that TNF-α controls not only the inflammatory functions of DCs but also their survival.
UR - http://www.scopus.com/inward/record.url?scp=2642526842&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=2642526842&partnerID=8YFLogxK
U2 - 10.1111/j.0906-6705.2004.00146.x
DO - 10.1111/j.0906-6705.2004.00146.x
M3 - Article
C2 - 15140018
AN - SCOPUS:2642526842
VL - 13
SP - 282
EP - 288
JO - Experimental Dermatology
JF - Experimental Dermatology
SN - 0906-6705
IS - 5
ER -