Role and significance of SIRT1 in regulating the LPS-activated pyroptosis pathway in children with congenital hydronephrosis
Objective To explore the characteristics and mechanism of sirtuin 1 (SIRT1) in lipopolysaccharide (LPS)-activated pyroptosis in the renal tissue of children with congenital hydronephrosis (CHn).Methods We detected the expression characteristics and clinical significance of SIRT1 and pyroptosis pathw...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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BMJ Publishing Group
2023-10-01
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| Series: | World Journal of Pediatric Surgery |
| Online Access: | https://wjps.bmj.com/content/6/4/e000602.full |
| _version_ | 1797365919607947264 |
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| author | Juan Zhou Daxing Tang Zhan Wang Gu Weizhong |
| author_facet | Juan Zhou Daxing Tang Zhan Wang Gu Weizhong |
| author_sort | Juan Zhou |
| collection | DOAJ |
| description | Objective To explore the characteristics and mechanism of sirtuin 1 (SIRT1) in lipopolysaccharide (LPS)-activated pyroptosis in the renal tissue of children with congenital hydronephrosis (CHn).Methods We detected the expression characteristics and clinical significance of SIRT1 and pyroptosis pathway proteins in CHn renal tissues by immunohistochemistry. The degree of renal fibrosis was detected by Masson staining. The human renal tubular epithelial cell line (HK-2) was cultured in vitro and treated with LPS (1 µg/mL), the SIRT1-specific agonist SRT1720 (2.5 µmol/L) and small interfering RNA (siRNA)-SIRT1 for 48 hours. After 48 hours, Cell Counting Kit-8 was used to detect the changes in cell proliferation ability, and ELISA was used to detect the changes in the expression of interleukin (IL)-1β and IL-18 in the cell supernatant. Real-time PCR (quantitative RT-PCR) and western blot analysis were used to detect the expression of SIRT1, caspase-1, caspase-4, NOD-like receptor thermal protein domain associated protein 3(NLRP3), and cleaved gasdermin D (GSDMD) in each group.Results Serum inflammatory cytokines were significantly elevated in 13 children with CHn with urinary tract infection, mainly caused by Gram-negative bacteria. Severe renal fibrosis occurred in children with CHn. Compared with the control group, the expression of SIRT1 in CHn kidney tissues was decreased, and the expression of caspase-4 and GSDMD was increased. LPS inhibited the expression of SIRT1 in HK-2 cells, promoted the expression of caspase-1, caspase-4, NLRP3, cleaved GSDMD, promoted the expression of IL-1β and IL-18 in the supernatant, and promoted pyroptosis in HK-2 cells. SRT1720 can inhibit LPS-activated pyroptosis by promoting SIRT1 expression, while siRNA-SIRT1 can further aggravate LPS-activated pyroptosis after inhibiting SIRT1 expression.Conclusions LPS can promote the inflammatory response in children with CHn by activating non-canonical pyroptosis and inhibiting SIRT1 expression. Promoting SIRT1 expression can inhibit pyroptosis of renal tubular epithelial cells, reduce the release of IL-18 and IL-1β, and alleviate the progression of renal fibrosis in children with CHn. |
| first_indexed | 2024-03-08T16:56:49Z |
| format | Article |
| id | doaj.art-60c8a0c013b44108aae1b6182979e1d9 |
| institution | Directory Open Access Journal |
| issn | 2516-5410 |
| language | English |
| last_indexed | 2024-03-08T16:56:49Z |
| publishDate | 2023-10-01 |
| publisher | BMJ Publishing Group |
| record_format | Article |
| series | World Journal of Pediatric Surgery |
| spelling | doaj.art-60c8a0c013b44108aae1b6182979e1d92024-01-04T23:05:08ZengBMJ Publishing GroupWorld Journal of Pediatric Surgery2516-54102023-10-016410.1136/wjps-2023-000602Role and significance of SIRT1 in regulating the LPS-activated pyroptosis pathway in children with congenital hydronephrosisJuan Zhou0Daxing Tang1Zhan Wang2Gu Weizhong3Department of Urological surgery, Children`s Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, ChinaDepartment of Urological surgery, Children`s Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, ChinaDepartment of Urological surgery, Children`s Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, ChinaDepartment of Pathology, Children`s Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, ChinaObjective To explore the characteristics and mechanism of sirtuin 1 (SIRT1) in lipopolysaccharide (LPS)-activated pyroptosis in the renal tissue of children with congenital hydronephrosis (CHn).Methods We detected the expression characteristics and clinical significance of SIRT1 and pyroptosis pathway proteins in CHn renal tissues by immunohistochemistry. The degree of renal fibrosis was detected by Masson staining. The human renal tubular epithelial cell line (HK-2) was cultured in vitro and treated with LPS (1 µg/mL), the SIRT1-specific agonist SRT1720 (2.5 µmol/L) and small interfering RNA (siRNA)-SIRT1 for 48 hours. After 48 hours, Cell Counting Kit-8 was used to detect the changes in cell proliferation ability, and ELISA was used to detect the changes in the expression of interleukin (IL)-1β and IL-18 in the cell supernatant. Real-time PCR (quantitative RT-PCR) and western blot analysis were used to detect the expression of SIRT1, caspase-1, caspase-4, NOD-like receptor thermal protein domain associated protein 3(NLRP3), and cleaved gasdermin D (GSDMD) in each group.Results Serum inflammatory cytokines were significantly elevated in 13 children with CHn with urinary tract infection, mainly caused by Gram-negative bacteria. Severe renal fibrosis occurred in children with CHn. Compared with the control group, the expression of SIRT1 in CHn kidney tissues was decreased, and the expression of caspase-4 and GSDMD was increased. LPS inhibited the expression of SIRT1 in HK-2 cells, promoted the expression of caspase-1, caspase-4, NLRP3, cleaved GSDMD, promoted the expression of IL-1β and IL-18 in the supernatant, and promoted pyroptosis in HK-2 cells. SRT1720 can inhibit LPS-activated pyroptosis by promoting SIRT1 expression, while siRNA-SIRT1 can further aggravate LPS-activated pyroptosis after inhibiting SIRT1 expression.Conclusions LPS can promote the inflammatory response in children with CHn by activating non-canonical pyroptosis and inhibiting SIRT1 expression. Promoting SIRT1 expression can inhibit pyroptosis of renal tubular epithelial cells, reduce the release of IL-18 and IL-1β, and alleviate the progression of renal fibrosis in children with CHn.https://wjps.bmj.com/content/6/4/e000602.full |
| spellingShingle | Juan Zhou Daxing Tang Zhan Wang Gu Weizhong Role and significance of SIRT1 in regulating the LPS-activated pyroptosis pathway in children with congenital hydronephrosis World Journal of Pediatric Surgery |
| title | Role and significance of SIRT1 in regulating the LPS-activated pyroptosis pathway in children with congenital hydronephrosis |
| title_full | Role and significance of SIRT1 in regulating the LPS-activated pyroptosis pathway in children with congenital hydronephrosis |
| title_fullStr | Role and significance of SIRT1 in regulating the LPS-activated pyroptosis pathway in children with congenital hydronephrosis |
| title_full_unstemmed | Role and significance of SIRT1 in regulating the LPS-activated pyroptosis pathway in children with congenital hydronephrosis |
| title_short | Role and significance of SIRT1 in regulating the LPS-activated pyroptosis pathway in children with congenital hydronephrosis |
| title_sort | role and significance of sirt1 in regulating the lps activated pyroptosis pathway in children with congenital hydronephrosis |
| url | https://wjps.bmj.com/content/6/4/e000602.full |
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