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Qu YD, Zhu ZH, Li JX, Zhang W, Chen Q, Xia CL, Ma JN, Ou SJ, Yang Y, Qi Y, Xu CP. Diabetes and osteoporosis: a two-sample mendelian randomization study. BMC Musculoskelet Disord 2024; 25:317. [PMID: 38654244 PMCID: PMC11036742 DOI: 10.1186/s12891-024-07430-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Accepted: 04/09/2024] [Indexed: 04/25/2024] Open
Abstract
BACKGROUND The effects on bone mineral density (BMD)/fracture between type 1 (T1D) and type 2 (T2D) diabetes are unknown. Therefore, we aimed to investigate the causal relationship between the two types of diabetes and BMD/fracture using a Mendelian randomization (MR) design. METHODS A two-sample MR study was conducted to examine the causal relationship between diabetes and BMD/fracture, with three phenotypes (T1D, T2D, and glycosylated hemoglobin [HbA1c]) of diabetes as exposures and five phenotypes (femoral neck BMD [FN-BMD], lumbar spine BMD [LS-BMD], heel-BMD, total body BMD [TB-BMD], and fracture) as outcomes, combining MR-Egger, weighted median, simple mode, and inverse variance weighted (IVW) sensitivity assessments. Additionally, horizontal pleiotropy was evaluated and corrected using the residual sum and outlier approaches. RESULTS The IVW method showed that genetically predicted T1D was negatively associated with TB-BMD (β = -0.018, 95% CI: -0.030, -0.006), while T2D was positively associated with FN-BMD (β = 0.033, 95% CI: 0.003, 0.062), heel-BMD (β = 0.018, 95% CI: 0.006, 0.031), and TB-BMD (β = 0.050, 95% CI: 0.022, 0.079). Further, HbA1c was not associated with the five outcomes (β ranged from - 0.012 to 0.075). CONCLUSIONS Our results showed that T1D and T2D have different effects on BMD at the genetic level. BMD decreased in patients with T1D and increased in those with T2D. These findings highlight the complex interplay between diabetes and bone health, suggesting potential age-specific effects and genetic influences. To better understand the mechanisms of bone metabolism in patients with diabetes, further longitudinal studies are required to explain BMD changes in different types of diabetes.
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Grants
- 202201020303, 202102080052, 202102010057, 201804010226 Science and Technology Planning Project of Guangzhou
- 202201020303, 202102080052, 202102010057, 201804010226 Science and Technology Planning Project of Guangzhou
- 3D-A2020004, 3D-A2020002, YQ2019-009, C2020019 Foundation of Guangdong Second Provincial General Hospital
- 3D-A2020004, 3D-A2020002, YQ2019-009, C2020019 Foundation of Guangdong Second Provincial General Hospital
- 81972083 National Natural Science Foundation of China
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Affiliation(s)
- Yu-Dun Qu
- The Second School of Clinical Medicine, Guangdong Second Provincial General Hospital, Southern Medical University, Guangzhou, Guangdong, P.R. China
| | - Zhao-Hua Zhu
- Clinical Research Centre, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Jia-Xuan Li
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, The Second School of Clinical Medicine, Southern Medical University, Guangzhou, Guangdong, P.R. China
| | - Wei Zhang
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, No. 466 Xingang Road, Haizhu District, Guangzhou, 510317, Guangdong, People's Republic of China
| | - Qi Chen
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, No. 466 Xingang Road, Haizhu District, Guangzhou, 510317, Guangdong, People's Republic of China
| | - Chang-Liang Xia
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, No. 466 Xingang Road, Haizhu District, Guangzhou, 510317, Guangdong, People's Republic of China
| | - Jun-Nan Ma
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, No. 466 Xingang Road, Haizhu District, Guangzhou, 510317, Guangdong, People's Republic of China
| | - Shuan-Ji Ou
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, No. 466 Xingang Road, Haizhu District, Guangzhou, 510317, Guangdong, People's Republic of China
| | - Yang Yang
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, No. 466 Xingang Road, Haizhu District, Guangzhou, 510317, Guangdong, People's Republic of China
| | - Yong Qi
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, No. 466 Xingang Road, Haizhu District, Guangzhou, 510317, Guangdong, People's Republic of China.
| | - Chang-Peng Xu
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, The Second School of Clinical Medicine, Southern Medical University, Guangzhou, Guangdong, P.R. China.
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Zhang W, Xia CL, Qu YD, Li JX, Liu JB, Ou SJ, Yang Y, Qi Y, Xu CP. MicroRNA-18a regulates the Pyroptosis, Apoptosis, and Necroptosis (PANoptosis) of osteoblasts induced by tumor necrosis factor-α via hypoxia-inducible factor-1α. Int Immunopharmacol 2024; 128:111453. [PMID: 38241841 DOI: 10.1016/j.intimp.2023.111453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 12/17/2023] [Accepted: 12/23/2023] [Indexed: 01/21/2024]
Abstract
BACKGROUND Tumor necrosis factor-α (TNF-α) is involved in inflammatory responses and promotes cell death and the inhibition of osteogenic differentiation. MicroRNA (miRNA) plays a crucial role in the infected bone diseases, however, the biological role of miRNAs in inflammation-induced impaired osteogenic differentiation remains unclear. This study aimed to explore the role of miRNA-18a-5p (miR-18a) in regulating PANoptosis and osteogenic differentiation in an inflammatory environment via hypoxia-inducible factor-1α (HIF1-α). METHODS The expression of miR-18a in MC3T3-E1 cells was analyzed using quantitative reverse transcription-polymerase chain reaction in an inflammatory environment induced by TNF-α. The expression of HIF1-α and NLRP3 in LV-miR-18a or sh-miR-18a cells was analyzed using western blotting. Fluorescence imaging for cell death, flow cytometry, and alkaline phosphatase activity analysis were used to analyze the role of miR-18a in TNF-α-induced PANoptosis and the inhibition of osteogenic differentiation. An animal model of infectious bone defect was established to validate the regulatory role of miR-18a in an inflammatory environment. RESULTS The expression of miRNA-18a in the MC3T3-E1 cell line was significantly lower under TNF-α stimulation than in the normal environment. miR-18a significantly inhibited the expression of HIF1-α and NLRP3, and inhibition of HIF1-α expression further inhibited NLRP3 expression. Furthermore, inhibition of miR-18a expression promoted the TNF-α-induced PANoptosis and inhibition of osteogenic differentiation, whereas miR-18a overexpression and the inhibition of both HIF1-α and NLRP3 reduced the effects of TNF-α. These findings are consistent with those of the animal experiments. CONCLUSION miRNA-18a negatively affects HIF1-α/NLRP3 expression, inhibits inflammation-induced PANoptosis, and impairs osteogenic differentiation. Thus, it is a potential therapeutic candidate for developing anti-inflammatory strategies for infected bone diseases.
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Affiliation(s)
- Wei Zhang
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, Guangzhou, Guangdong, China; The Second School of Clinical Medicine, Southern Medical University.
| | - Chang-Liang Xia
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, Guangzhou, Guangdong, China.
| | - Yu-Dun Qu
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, Guangzhou, Guangdong, China; The Second School of Clinical Medicine, Southern Medical University.
| | - Jia-Xuan Li
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, Guangzhou, Guangdong, China.
| | - Jia-Bao Liu
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, Guangzhou, Guangdong, China.
| | - Shuan-Ji Ou
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, Guangzhou, Guangdong, China.
| | - Yang Yang
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, Guangzhou, Guangdong, China.
| | - Yong Qi
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, Guangzhou, Guangdong, China; The Second School of Clinical Medicine, Southern Medical University.
| | - Chang-Peng Xu
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, Guangzhou, Guangdong, China; The Second School of Clinical Medicine, Southern Medical University.
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Qu YD, Jiang N, Li JX, Zhang W, Xia CL, Ou SJ, Yang Y, Ma YF, Qi Y, Xu CP. Chronic osteomyelitis risk is associated with NLRP3 gene rs10754558 polymorphism in a Chinese Han Population. BMC Med Genomics 2024; 17:38. [PMID: 38287380 PMCID: PMC10823619 DOI: 10.1186/s12920-024-01799-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 01/08/2024] [Indexed: 01/31/2024] Open
Abstract
BACKGROUND Single nucleotide polymorphisms (SNPs) in the nucleotide-binding domain leucine-rich repeat protein-3 (NLRP3) gene are reported to be linked to many inflammatory disorders. However, uncertainty persists over the associations between these SNPs and susceptibilities to chronic osteomyelitis (COM). This study aimed to investigate potential relationships between NLRP3 gene SNPs and the risks of developing COM in a Chinese Han cohort. METHODS The four tag SNPs of the NLRP3 gene were genotyped in a total of 428 COM patients and 368 healthy controlsusing the SNapShot technique. The genotype distribution, mutant allele frequency, and the four genetic models (dominant, recessive, homozygous, and heterozygous) of the four SNPs were compared between the two groups. RESULTS A significant association was found between rs10754558 polymorphism and the probability of COM occurence by the heterozygous model (P = 0.037, odds ratio [OR] = 1.541, 95% confidence interval [CI] = 1.025-2.319), indicating that rs10754558 may be associated with a higher risk of developing COM.In addition, possible relationship was found between rs7525979 polymorphism and the risk of COM development by the outcomes of homozygous (P = 0.073, OR = 0.453, 95% CI = 0.187-1.097) and recessive (P = 0.093, OR = 0.478, 95% CI = 0.198-1.151) models, though no statistical differences were obtained. CONCLUSIONS Outcomes of the present study showed, for the first time, that rs10754558 polymorphism of the NLRP3 gene may increase the risk of COM development in this Chinese Han population, with genotype CG as a risk factor. Nonetheless, this conclusion requires verification from further studies with a larger sample size.
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Grants
- 81972083, 82172197 National Natural Science Foundation of China
- 81972083, 82172197 National Natural Science Foundation of China
- 2020A0505100039 Guangdong Provincial Science and Technology Project
- 2022A1515012385 Guangdong Basic and Applied Basic Research Foundation
- 202201020303, 202102080052, 202102010057, 201804010226 Science and Technology Planning Project of Guangzhou
- 202201020303, 202102080052, 202102010057, 201804010226 Science and Technology Planning Project of Guangzhou
- 3D-A2020004, 3D-A2020002, YQ2019-009, C2020019 Science Foundation of Guangdong Second Provincial General Hospital
- 3D-A2020004, 3D-A2020002, YQ2019-009, C2020019 Science Foundation of Guangdong Second Provincial General Hospital
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Affiliation(s)
- Yu-Dun Qu
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, 466 Xingang Road, Haizhu District, 510317, Guangzhou, China
| | - Nan Jiang
- Division of Orthopaedics and Traumatology, Department of Orthopaedics, Nanfang Hospital, Southern Medical University, 510515, Guangzhou, China
| | - Jia-Xuan Li
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, 466 Xingang Road, Haizhu District, 510317, Guangzhou, China
| | - Wei Zhang
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, 466 Xingang Road, Haizhu District, 510317, Guangzhou, China
| | - Chang-Liang Xia
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, 466 Xingang Road, Haizhu District, 510317, Guangzhou, China
| | - Shuan-Ji Ou
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, 466 Xingang Road, Haizhu District, 510317, Guangzhou, China
| | - Yang Yang
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, 466 Xingang Road, Haizhu District, 510317, Guangzhou, China
| | - Yun-Fei Ma
- Division of Orthopaedics and Traumatology, Department of Orthopaedics, Nanfang Hospital, Southern Medical University, 510515, Guangzhou, China
| | - Yong Qi
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, 466 Xingang Road, Haizhu District, 510317, Guangzhou, China.
| | - Chang-Peng Xu
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, 466 Xingang Road, Haizhu District, 510317, Guangzhou, China.
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Zhang W, Xia CL, Ma JN, Li JX, Chen Q, Ou SJ, Yang Y, Qi Y, Xu CP. Effects of mitochondrial dysfunction on bone metabolism and related diseases: a scientometric study from 2003 to 2022. BMC Musculoskelet Disord 2022; 23:1016. [DOI: 10.1186/s12891-022-05911-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Accepted: 10/25/2022] [Indexed: 11/28/2022] Open
Abstract
Abstract
Background
In recent years, mitochondrial dysfunction has been extensively studied and published, but research on the effects of mitochondrial dysfunction on bone metabolism and related diseases is only just beginning. Furthermore, no studies have been carried out to systematically illustrate this area from a scientometric point of view. The goal of this research is to review existing knowledge and identify new trends and possible hotspots in this area.
Methods
All publications related to the relationship between mitochondrial dysfunction and bone metabolism and related diseases from 2003 to 2022 were searched at the Web of Science Core Collection (WoSCC) on May 7, 2022. Four different analytical tools: VOSviewer 1.6.18, CiteSpace V 6.1, HistorCite (12.03.07), and Excel 2021 were used for the scientometric research.
Results
The final analysis included 555 valid records in total. Journal of Biological Chemistry (Co-citations = 916) is the most famous journal in this field. China (Percentage = 37%), the United States (Percentage = 24%), and Korea (Percentage = 12%) are the most productive countries. Blanco FJ and Choi EM are the main researchers with significant academic influence. Current research hotspots are basic research on mitochondrial dysfunction and the prevention or treatment of bone metabolism-related diseases.
Conclusion
The study of the consequences of mitochondrial dysfunction on bone metabolism and associated diseases is advancing rapidly. Several prominent researchers have published extensive literature and are widely cited. Future research in this area will focus on oxidative stress, aging, gene expression, and the pathogenesis of bone metabolism-related diseases.
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Xia CL, Zhang JX. [Research progress on rodent animal models of heart failure with preserved ejection fraction]. Zhonghua Xin Xue Guan Bing Za Zhi 2022; 50:646-652. [PMID: 35856220 DOI: 10.3760/cma.j.cn112148-20210804-00667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Affiliation(s)
- C L Xia
- Department of Cardiology, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, China
| | - J X Zhang
- Department of Cardiology, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, China
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6
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Wu WJ, Xia CL, Ou SJ, Yang Y, Zhou XZ, Ma YF, Hou YL, Wang FZ, Yang QP, Qi Y, Xu CP. Prophylactic Effects of NFκB Essential Modulator–Binding Domain Peptides on Bone Infection: An Experimental Study in a Rabbit Model. J Inflamm Res 2022; 15:2745-2759. [PMID: 35509324 PMCID: PMC9059993 DOI: 10.2147/jir.s346627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 03/16/2022] [Indexed: 11/23/2022] Open
Abstract
Introduction Methods Results Conclusion
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Affiliation(s)
- Wen-Jiao Wu
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, Guangzhou, Guangdong, People’s Republic of China
| | - Chang-Liang Xia
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, Guangzhou, Guangdong, People’s Republic of China
| | - Shuan-Ji Ou
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, Guangzhou, Guangdong, People’s Republic of China
| | - Yang Yang
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, Guangzhou, Guangdong, People’s Republic of China
| | - Xiao-Zhong Zhou
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, Guangzhou, Guangdong, People’s Republic of China
| | - Yun-Fei Ma
- Department of Orthopaedics and Traumatology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, People’s Republic of China
| | - Yi-Long Hou
- Department of Orthopaedics and Traumatology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, People’s Republic of China
| | - Fa-Zheng Wang
- Department of Orthopaedics, First People’s Hospital of Kashgar Prefecture, Kashgar, Xinjiang, People’s Republic of China
| | - Qing-Po Yang
- Department of Orthopaedics, First People’s Hospital of Kashgar Prefecture, Kashgar, Xinjiang, People’s Republic of China
| | - Yong Qi
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, Guangzhou, Guangdong, People’s Republic of China
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, Guangdong, People's Republic of China
- Correspondence: Yong Qi; Chang-Peng Xu, Tel +86-20-8916-8085, Email ;
| | - Chang-Peng Xu
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, Guangzhou, Guangdong, People’s Republic of China
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, Guangdong, People's Republic of China
- Correspondence: Yong Qi; Chang-Peng Xu, Tel +86-20-8916-8085, Email ;
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Wu WJ, Xia CL, Ou SJ, Yang Y, Ma YF, Hou YL, Yang QP, Zhang J, Li JW, Qi Y, Xu CP. Novel Elongator Protein 2 Inhibitors Mitigating Tumor Necrosis Factor- α Induced Osteogenic Differentiation Inhibition. Biomed Res Int 2021; 2021:3664564. [PMID: 34853789 PMCID: PMC8629650 DOI: 10.1155/2021/3664564] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 10/12/2021] [Indexed: 11/17/2022]
Abstract
Tumor necrosis factor-α is a common cytokine that increases in inflammatory processes, slows the differentiation of bone formation, and induces osteodystrophy in the long-term inflammatory microenvironment. Our previous study confirmed that the Elongation protein 2 (ELP2) plays a significant role in osteogenesis and osteogenic differentiation, which is considered a drug discovery target in diseases related to bone formation and differentiation. In this study, we applied an in silico virtual screening method to select molecules that bind to the ELP2 protein from a chemical drug molecule library and obtained 95 candidates. Then, we included 11 candidates by observing the docking patterns and the noncovalent bonds. The binding affinity of the ELP2 protein with the candidate compounds was examined by SPR analysis, and 5 out of 11 compounds performed good binding affinity to the mouse ELP2 protein. After in vitro cell differentiation assay, candidates 2# and 5# were shown to reduce differentiation inhibition after tumor necrosis factor-α stimulation, allowing further optimization and development for potential clinical treatment of inflammation-mediated orthopedic diseases.
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Affiliation(s)
- Wen-Jiao Wu
- Department of Medical Research Center, Guangdong Second Provincial General Hospital, Guangzhou, Guangdong, China
| | - Chang-Liang Xia
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, Guangzhou, Guangdong, China
| | - Shuan-Ji Ou
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, Guangzhou, Guangdong, China
| | - Yang Yang
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, Guangzhou, Guangdong, China
| | - Yun-Fei Ma
- Department of Orthopaedics and Traumatology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Yi-Long Hou
- Department of Orthopaedics and Traumatology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Qing-Po Yang
- Department of Orthopaedics, The First People's Hospital of Kashgar Prefecture, Kashgar, Xinjiang, China
| | - Jun Zhang
- Department of Orthopaedics, The First People's Hospital of Kashgar Prefecture, Kashgar, Xinjiang, China
| | - Jian-Wei Li
- Department of Orthopaedics, Shenzhen Shekou People's Hospital, Shenzhen, Guangdong, China
| | - Yong Qi
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, Guangzhou, Guangdong, China
| | - Chang-Peng Xu
- Department of Orthopaedics, Guangdong Second Provincial General Hospital, Guangzhou, Guangdong, China
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Qian WF, Guan WX, Gao Y, Tan JF, Qiao ZM, Huang H, Xia CL. Inhibition of STAT3 by RNA interference suppresses angiogenesis in colorectal carcinoma. Braz J Med Biol Res 2011; 44:1222-30. [PMID: 22030865 DOI: 10.1590/s0100-879x2011007500143] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2011] [Accepted: 10/13/2011] [Indexed: 12/13/2022] Open
Abstract
In order to investigate signal transduction and activation of transcription 3 (STAT3) signaling on angiogenesis in colorectal carcinoma (CRC) after inhibiting STAT3 expression, we constructed the HT-29-shSTAT3 cell line by lentivirus-mediated RNAi. Cell growth was assessed with MTT and the cell cycle distribution by flow cytometry. CRC nude mouse models were established and tumor growth was monitored periodically. On day 30, all mice were killed and tumor tissues were removed. Microvessel density (MVD) was determined according to CD34-positive staining. The expression of vascular endothelial growth factor A (VEGFA), matrix metalloproteinase-2 (MMP2) and basic fibroblast growth factor (FGF2) was monitored by quantitative real-time PCR and Western blot analysis. Knockdown of STAT3 expression significantly inhibited cell growth in HT-29 cells, with a significantly higher proportion of cells at G0/G1 (P < 0.01). Consistently, in vivo data also demonstrated that tumor growth was significantly inhibited in mice injected with HT-29-shSTAT3 cells. MVD was 9.80 ± 3.02 in the HT-29-shSTAT3 group, significantly less than that of the control group (P < 0.01). mRNA and protein levels of VEGFA and MMP2 in the HT-29-shSTAT3 group were significantly lower than in the control group (P < 0.05), but no significant difference was observed in the mRNA or protein level of FGF2 (P > 0.05). Taken together, these results demonstrate that STAT3 signaling is important to the growth of CRC and promotes angiogenesis by regulating VEGFA and MMP2 expression.
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Affiliation(s)
- W F Qian
- Department of General Surgery, Suzhou Hospital Affiliated to Nanjing Medical University, JS, China.
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Cooke EL, Uings IJ, Xia CL, Woo P, Ray KP. Functional analysis of the interleukin-1-receptor-associated kinase (IRAK-1) in interleukin-1 beta-stimulated nuclear factor kappa B (NF-kappa B) pathway activation: IRAK-1 associates with the NF-kappa B essential modulator (NEMO) upon receptor stimulation. Biochem J 2001; 359:403-10. [PMID: 11583588 PMCID: PMC1222160 DOI: 10.1042/0264-6021:3590403] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The interleukin-1 (IL-1)-receptor-associated kinase (IRAK-1) is essential for IL-1-stimulated nuclear factor kappa B (NF-kappa B) activation. To study the role of IRAK-1 in IL-1 beta signalling, we have generated a set of IRAK-1 variants that express distinct domains of IRAK-1 either alone or in combination and have examined their effects on an NF-kappa B-responsive reporter in HeLa cells. Unlike full-length IRAK-1, the deletion mutants were unable to activate NF-kappa B in the absence of cytokine stimulation. However, an IRAK-1 variant lacking only the N-terminal domain retained the ability of the full-length protein to potentiate both IL-1 beta and tumour necrosis factor alpha (TNF alpha)-induced NF-kappa B activation. In contrast, expression of the N-terminus or the C-terminus of IRAK-1, or a fusion protein incorporating both domains, inhibited both IL-1 beta- and TNF alpha-induced effects. Expression of an IRAK-1 variant lacking only the C-terminal domain preferentially inhibited IL-1 beta versus TNF alpha-induced NF-kappa B activation. These data suggest that the C-terminal domain may link IRAK-1 to downstream signalling components common to both the IL-1 and TNF pathways. Furthermore, we have demonstrated that endogenous IRAK-1 becomes phosphorylated upon IL-1 beta treatment and can be detected along with NF-kappa B essential modulator (NEMO) and I kappa B kinase beta (IKK beta) in high-molecular-mass complexes of 600-800 kDa. Moreover, IRAK-1 could be detected in NEMO immunoprecipitates from IL-1 beta-stimulated cells. We conclude that IRAK-1 mediates IL-1 beta signal transduction through a ligand-dependent association of IRAK-1 with the IKK complex.
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Affiliation(s)
- E L Cooke
- Department of Molecular Pathology, The Windeyer Institute of Medical Sciences, University College London, 46 Cleveland Street, London W1P 6DB, UK
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Spencer SR, Taylor JB, Cowell IG, Xia CL, Pemble SE, Ketterer B. The human mitochondrial NADH: ubiquinone oxidoreductase 51-kDa subunit maps adjacent to the glutathione S-transferase P1-1 gene on chromosome 11q13. Genomics 1992; 14:1116-8. [PMID: 1478657 DOI: 10.1016/s0888-7543(05)80144-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- S R Spencer
- Cancer Research Campaign Molecular Toxicology Research Group, University College and Middlesex School of Medicine, London, United Kingdom
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11
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Xia CL, Cowell IG, Dixon KH, Pemble SE, Ketterer B, Taylor JB. Glutathione transferase pi its minimal promoter and downstream cis-acting element. Biochem Biophys Res Commun 1991; 176:233-40. [PMID: 1850260 DOI: 10.1016/0006-291x(91)90914-s] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Fragments of the human glutathione S-transferase pi gene and 15 kb of its 5' flanking region have been fused to the chloramphenicol acetyl transferase (CAT) reporter gene. Transfection into a number of human cell lines (Hela, HepG2, MCF7 and EJ) has demonstrated that the AP1 binding site, located between nucleotides -58 and -65 (Cowell et al. 1988. Biochem. J. 255, 79-83), is essential for basal level promoter activity. We have also identified a positive cis-acting DNA element between nucleotides +8 and +72 which seems to be part of the promoter. No other regulatory activity was identified within the 17 kb analyzed.
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Affiliation(s)
- C L Xia
- Cancer Research Campaign Molecular Toxicology Research Group, University College and Middlesex School of Medicine, London, U.K
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Dixon KH, Cowell IG, Xia CL, Pemble SE, Ketterer B, Taylor JB. Control of expression of the human glutathione S-transferase pi gene differs from its rat orthologue. Biochem Biophys Res Commun 1989; 163:815-22. [PMID: 2783123 DOI: 10.1016/0006-291x(89)92295-x] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
We have examined regulation of the glutathione S-transferase pi gene by transient expression assay, and find that a fragment from 8 to 99 bp upstream of the cap site promotes transcription, but there is no evidence for any enhancer activity in a further 6 kb of flanking sequence. Analysis of this sequence by reference to a primate sequence database and Southern blotting revealed that as much as 5 kb of this flanking DNA were composed of repetitive insertion elements including an Alu and a LINE 1 repeat. The promoter fragment has been sequenced (Cowell et al (1988) Biochem. J. 255, 79-83) and contains a consensus AP1 binding site; in some cases, these have been associated with transcriptional induction by phorbol esters and ras oncogenes. We measured the steady state levels of glutathione S-transferase pi mRNA in human cell lines which were known to express ras oncogenes and compared them to human cell lines which have not been identified with ras activation. There was no correlation between expression of activated ras and expression of glutathione S-transferase pi mRNA. Treatment of HeLa cells, HepG2 cells and a small cell lung carcinoma line, GLC 8, with the phorbol ester 12-O-tetradecanoylphorbol 13-acetate failed to alter the steady state levels of endogenous glutathione S-transferase pi mRNA. The differences between these results and those of similar studies on rat glutathione S-transferase subunit 7, a structural orthologue of glutathione S-transferase pi, are discussed.
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Affiliation(s)
- K H Dixon
- CRC Molecular Toxicology Research Group, University College and Middlesex School of Medicine, London, UK
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