interleukin-8 and Nephritis

Valsartan has been studied to exert effects on kidney disease. However, the concrete function of valsartan in combination with tripterygium glycosides in chronic nephritis remained largely unknown. The study was designed to unravel the impacts of valsartan and tripterygium glycosides in chronic nephritis through the Toll-like Receptor 4 (TLR4) pathway.. The renal function indicators such as serum creatinine (Scr), blood urea nitrogen (BUN) and. Valsartan in combination with tripterygium glycosides protects against chronic nephritis via suppressing the Toll-like Receptor 4 pathway.

Topics: Cholesterol, LDL; Glycosides; Humans; Interleukin-1beta; Interleukin-8; Nephritis; Toll-Like Receptor 4; Tripterygium; Valsartan

The prevalence of gout is relatively high worldwide, and many gout patients suffer from uric acid nephropathy (UAN) concomitantly. ELR-CXC chemokines such as CXCL8 and CXCL1 have a elevated expression in UAN. In this research, a mouse UAN model was established for a 12 week duration, and uric acid-related crystals were observed. CXCL8(3-72)K11R/G31P (G31P) is a mutant protein of CXCL8/interleukin 8 (IL-8), which has been reported to have therapeutic efficacy in both inflammatory diseases and malignancies for it acts as a selective antagonist towards CXCR1/CXCR2. In this study, G31P-treated mice showed declined production of the blood urea nitrogen (BUN) level and urine volume in UAN mice compared with G31P-untreated UAN counterparts. In addition, G31P effectively improved renal fibrosis, and reduced uric acid accumulation and leukocyte infiltration in UAN kidneys. Furthermore, the expressions of CXCL1 and CXCL2 were reduced and the activation of NOD-like receptors protein 3 (NLRP3) was inhibited by G31P treatment. This study has demonstrated that G31P attenuates inflammatory progression in chronic UAN, and plays a renoprotective function.

Topics: Animals; Blood Urea Nitrogen; Chemokine CXCL1; Disease Models, Animal; Humans; Interleukin-8; Kidney Diseases; Leukocytes; Male; Mice; Nephritis; NLR Family, Pyrin Domain-Containing 3 Protein; Peptide Fragments; Receptors, Interleukin-8A; Receptors, Interleukin-8B; Uric Acid

The objective of this study is to investigate the association between IL-8 gene 2767 G/A polymorphism and clinical features, kidney involvement and prognosis in childhood Henoch Schnölein purpura (HSP). A total of 115 patients with HSP (59 male, 56 female) were included in the study with age at diagnosis between 2 and 17 years (8.0 ± 3.0). Hundred and eight healthy adults were included in the study as controls. The patients had been followed up for kidney involvement for at least 6 months and in average 8.2 ± 7.5 months. Interleukin 8 (IL-8) gene 2767 G/A polymorphism was studied by PCR-RFLP method. Frequency of the "A" allele was 0.37 in the patient group, whereas it was 0.36 in the control group. The difference was not statistically significant (P = 0.696). No association was detected between the IL-8 gene G/A polymorphism and the clinical, laboratory, and demographic data related to the patients with HSP. Kidney involvement was more common in those with the G/A polymorphism of the IL-8 gene. While a 0.44 frequency of the "A" allele was detected in those with kidney involvement, this rate was 0.29 in those with no kidney involvement (P = 0.046). Follow-up of those with the "A" allele revealed higher proteinuria (P = 0.023, odds ratio 0.176, 95% CI 0.034-0.917) and higher creatinine levels (P = 0.049, odds ratio 0.024, 95% CI 0.036-0.094). These results suggest that the kidney involvement is more common in patients with the "A" allele, and degree of proteinuria and creatinine levels is higher in these patients at follow-up.

Topics: Adolescent; Adult; Child; Child, Preschool; Female; Gene Frequency; Genetic Association Studies; Genetic Predisposition to Disease; Genotype; Humans; IgA Vasculitis; Interleukin-8; Male; Nephritis; Polymorphism, Single Nucleotide

Renal inflammation is the main pathological change in many acute and chronic kidney diseases. Curcumin, a yellow pigment present in the rhizome of turmeric (Curcuma longa L. Zingiberaceae), was found to be a potential anti-inflammatory agent. The present study aimed to investigate the effects of curcumin on the inflammation of mice kidney and cultured renal tubular epithelial cells (HK-2 cells) induced by lipopolysaccharide (LPS) and to explore the mechanism. Curcumin was injected intraperitoneally before LPS administration. Renal inflammation was assessed by evaluating monocyte chemoattractant protein-1 (MCP-1) expression and macrophage infiltration in renal tissue using immunohistochemical methods, and also by measuring renal MCP-1 mRNA level using Real-Time polymerase chain reaction (PCR). HK-2 cells were cultured to investigate the in vitro effect of curcumin against LPS-induced renal inflammation. The expression of MCP-1 and interleukin-8 (IL-8) mRNA was measured by Real-Time PCR. The expression of MCP-1 and IL-8 protein in supernatant was detected by enzyme-linked immunosorbent assay (ELISA). The activity of nuclear factor (NF)-κB was detected by electrophoretic mobility shift assay (EMSA). The results demonstrated that curcumin could inhibit LPS-induced renal MCP-1 mRNA expression. Curcumin also significantly inhibited the expression of MCP-1 and IL-2 mRNA in HK-2 cells, and partially inhibited the secretion of MCP-1 and IL-8. Furthermore, curcumin was found to inhibit the DNA-binding activity of NF-κB. The present study demonstrated that curcumin has a protective effect on LPS-induced experimental renal inflammation, and this effect might be attributed to its inhibitory effects on MCP-1 mRNA expression and DNA-binding activity of NF-κB. Hence, curcumin might be potentially useful in some kidney diseases by preventing renal inflammation.

Topics: Animals; Anti-Inflammatory Agents; Cells, Cultured; Chemokine CCL2; Curcuma; Curcumin; Epithelial Cells; Humans; Interleukin-2; Interleukin-8; Lipopolysaccharides; Mice; Mice, Inbred Strains; Nephritis; NF-kappa B; Phytotherapy; Plant Extracts; Polymerase Chain Reaction; Rhizome; RNA, Messenger

To assess the influence of interleukin-8 (IL-8), epithelial cell-derived neutrophil-activating peptide (ENA-78), and regulated upon activation normal T cell expressed and secreted (RANTES) gene polymorphisms in the susceptibility and clinical expression of patients fulfilling classification criteria for Henoch-Schönlein purpura (HSP).. Fifty patients (25 men) from Northwest Spain with primary cutaneous vasculitis classified as HSP according to proposed criteria were studied. All patients were required to have had at least 2 years' followup. Patients and ethnically matched controls were genotyped for IL-8, ENA-78, and RANTES gene polymorphisms.. No allele or genotype differences between patients fulfilling HSP classification criteria and controls were observed for any of the chemokines. However, a significantly increased frequency of allele A of the IL-8 gene polymorphism was found in patients with HSP who developed renal manifestations compared with patients without renal involvement (p = 0.02; pcorr = 0.036). Moreover, the genotype distribution in HSP patients with and without renal involvement showed statistically significant differences (p = 0.02).. In unselected patients with cutaneous vasculitis, carriage of IL-8 allele A influences the susceptibility to renal involvement.

Topics: Adolescent; Adult; Chemokine CCL5; Chemokine CXCL5; Chemokines, CXC; Child; Child, Preschool; DNA Mutational Analysis; Female; Gene Frequency; Genetic Predisposition to Disease; Genetic Testing; Genotype; Humans; IgA Vasculitis; Interleukin-8; Male; Middle Aged; Nephritis; Polymorphism, Genetic