Abstract | OBJECTIVE: METHODS: Fifteen consecutively hospitalized LN patients were selected as subjects and 15 healthy adults as normal controls. PBMC were obtained by Ficoll density gradient centrifugation. IgG, anti-dsDNA antibody and IL-6 protein levels were assessed using enzyme-linked immunosorbent assays (ELISA) on the supernatant of cultured PBMC of LN patients or normal controls. IL-6 mRNA levels in PBMC were measured using reverse transcription-polymerase chain reaction (RT-PCR). RESULTS: In medium culture, IgG, anti-dsDNA and IL-6 protein levels of the supernatant of PBMC from LN patients were significantly higher than those from normal controls (1492.1 +/- 73.2 ng/ml vs 636.7 +/- 51.9 ng/ml for IgG, 306.6 +/- 53.7 IU/ml vs 95.8 +/- 11.6 IU/ml for anti-dsDNA and 50.92 +/- 15.92 ng/ml vs 1.77 +/- 0.73 ng/ml for IL-6, all P < 0.001). In LN patients, IgG, anti-dsDNA and IL-6 protein levels were higher in the supernatants of PBMC in the IL-17-stimulated culture than the medium culture, but in normal controls, only the IL-6 protein levels were significantly higher. The increase in IgG, anti-dsDNA and IL-6 protein levels induced by IL-17 was dose-dependent and could be completely blocked by IL-17 monoclonal antibody mIgG(28) and partially blocked by dexamethasone. Similarly, IL-6 mRNA overexpression of PBMC in LN patients or normal controls induced by IL-17 was both dose- and time-dependent. During medium culture, IL-6 mRNA levels in LN patients were significantly higher than those in normal controls (1.80 +/- 0.11 vs 0.36 +/- 0.07). During stimulation with IL-17, IL-6 mRNA levels in LN patients were higher than those in normal controls (3.21 +/- 0.24 vs 1.30 +/- 0.14, P < 0.05) and also significantly higher when comparing the stimulated culture with the medium culture either in LN patients or normal control. CONCLUSIONS:
IL-17 may play an important role in the pathogenesis of LN through the induction of IgG, anti-dsDNA overproduction and IL-6 overexpression of PBMC in LN patients.
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Authors | Guangfu Dong, Rengao Ye, Wei Shi, Shuangxin Liu, Tao Wang, Xiao Yang, Niansheng Yang, Xueqing Yu |
Journal | Chinese medical journal
(Chin Med J (Engl))
Vol. 116
Issue 4
Pg. 543-8
(Apr 2003)
ISSN: 0366-6999 [Print] China |
PMID | 12875719
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Antibodies, Antinuclear
- Autoantibodies
- Immunoglobulin G
- Interleukin-17
- Interleukin-6
- RNA, Messenger
|
Topics |
- Adolescent
- Adult
- Antibodies, Antinuclear
(biosynthesis)
- Autoantibodies
(biosynthesis)
- Female
- Humans
- Immunoglobulin G
(biosynthesis)
- Interleukin-17
(pharmacology)
- Interleukin-6
(biosynthesis, genetics)
- Leukocytes, Mononuclear
(metabolism)
- Lupus Nephritis
(immunology)
- Male
- RNA, Messenger
(analysis)
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