Lack of endothelial nitric oxide synthase aggravates murine accelerated anti-glomerular basement membrane glomerulonephritis

被引:69
作者
Heeringa, P
van Goor, H
Itoh-Lindstrom, Y
Maeda, N
Falk, RJ
Assmann, KJM
Kallenberg, CGM
Jennette, JC
机构
[1] Univ N Carolina, Dept Pathol & Lab Med, Chapel Hill, NC 27599 USA
[2] Univ N Carolina, Dept Med, Chapel Hill, NC 27599 USA
[3] Univ Hosp, Dept Clin Immunol, Groningen, Netherlands
[4] Univ Hosp, Dept Pathol, Groningen, Netherlands
[5] Univ Hosp, Dept Pathol, Nijmegen, Netherlands
关键词
D O I
10.1016/S0002-9440(10)64957-7
中图分类号
R36 [病理学];
学科分类号
100104 ;
摘要
Nitric oxide (NO) radicals generated by endothelial nitric oxide synthase (eNOS) are involved in the regulation of vascular tone. In addition, NO radicals derived from eNOS inhibit platelet aggregation and leukocyte adhesion to the endothelium and, thus, may have anti-inflammatory effects. To study the role of eNOS in renal inflammation, the development of accelerated anti-glomerular basement membrane (GBM) glomerulonephritis was examined in mice lacking a functional gene for eNOS and compared with wild-type (WT) C57BL/B6j mice. WT C57BL/6j mice (n = 12) and eNOS knockout (-/-) mice (n = 12) were immunized intraperitoneally with sheep IgG (0.2 mg in complete Freund's adjuvant), At day 6.5 after immunization, mice received a single i.v. injection of sheep anti-mouse GBM (1 mg in 200 mu l PBS). Mice were sacrificed at day 1 and 10 after induction of the disease. All WT mice survived until day 10, whereas 1 eNOS-/- mouse died and 2 more became moribund, requiring sacrifice. At day 10, eNOS-/- mice had higher levels of blood urea nitrogen than WT mice (P < 0.02), although proteinuria was comparable. Immunofluorescence microscopy documented similar IgG deposition in both WT and eNOS-/- mice,but eNOS-/- mice had more extensive glomerular staining for fibrin at day 10 (P < 0.007), At day 10, light microscopy demonstrated that eNOS-/- mice had more severe glomerular thrombosis (P < 0.003) and influx of neutrophils (P < 0.006), but similar degrees of overall glomerular endocapillary hypercellularity and crescent formation. In conclusion, accelerated anti-GBM glomerulonephritis is severely aggravated in eNOS-/- mice, especially with respect to glomerular capillary thrombosis and neutrophil infiltration, These results indicate that NO radicals generated by eNOS play a protective role during renal inflammation.
引用
收藏
页码:879 / 888
页数:10
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