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Wu Y, Deng H, Sun J, Tang J, Li X, Xu Y. Poricoic acid A induces mitophagy to ameliorate podocyte injury in diabetic kidney disease via downregulating FUNDC1. J Biochem Mol Toxicol 2023; 37:e23503. [PMID: 37706594 DOI: 10.1002/jbt.23503] [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: 05/06/2023] [Revised: 07/10/2023] [Accepted: 07/31/2023] [Indexed: 09/15/2023]
Abstract
Diabetic kidney disease (DKD) is a devastating complication of diabetes mellitus (DM) and is the most prevalent chronic kidney disease (CKD). Poricoic acid A (PAA), a component isolated from Traditional Chinese Medicine (TCM) Poria cocos, has hypoglycaemic and anti-fibrosis effects. However, the role of PAA in DKD remains largely unclear. To mimics an in vitro model of DKD, the mouse podocyte MPC5 cells were treated with high glucose (25 mM; HG) for 24 h. CCK-8 and flow cytometry assays were conducted for assessing MPC5 cell viability and apoptosis. Meanwhile, streptozotocin (STZ) was used to induce experimental DKD in mice by intraperitoneal injection. PAA notably inhibited the apoptosis and inflammation, reduced the generation of ROS, and elevated the MMP level in HG-treated MPC5 cells. Moreover, PAA obviously reduced blood glucose and urine protein levels, inhibited renal fibrosis in DKD mice. Meanwhile, PAA markedly increased LC3 and ATG5 levels and declined p62 and FUNDC1 levels in HG-treated MPC5 cells and in the kidney tissues of DKD mice, leading to the activation of cell mitophagy. Furthermore, the downregulation of FUNDC1 also inhibited apoptosis, inflammation, and promoted mitophagy in HG-treated MPC5 cells. As expected, the knockdown of FUNDC1 further enhanced the protective role of PAA in MPC5 cells following HG treatment, indicating that induction of mitophagy could attenuate podocyte injury. Collectively, PAA could exert beneficial effects on podocyte injury in DKD by promoting mitophagy via downregulating FUNDC1. These findings suggested that PAA may have great potential in alleviating kidney injury in DKD.
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Affiliation(s)
- Yuwen Wu
- Department of Endocrinology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Haohua Deng
- Department of Endocrinology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Jiazhong Sun
- Department of Endocrinology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Jun Tang
- Department of Endocrinology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Xin Li
- Department of Endocrinology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Yancheng Xu
- Department of Endocrinology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
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Zhai G, Gong R, Lin Y, Zhang M, Li J, Deng Z, Sun J, Chen W, Zhang Z. Structural Insight into the Catalytic Mechanism of Non-Heme Iron Halogenase AdaV in 2′-Chloropentostatin Biosynthesis. ACS Catal 2022. [DOI: 10.1021/acscatal.2c04608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Guoqing Zhai
- Department of Endocrinology, Zhongnan Hospital of Wuhan University, School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, and School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
| | - Rong Gong
- Department of Endocrinology, Zhongnan Hospital of Wuhan University, School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, and School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
| | - Yaxin Lin
- Department of Endocrinology, Zhongnan Hospital of Wuhan University, School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, and School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
| | - Meng Zhang
- Department of Endocrinology, Zhongnan Hospital of Wuhan University, School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, and School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
| | - Jiahui Li
- Department of Endocrinology, Zhongnan Hospital of Wuhan University, School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, and School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
| | - Zixin Deng
- Department of Endocrinology, Zhongnan Hospital of Wuhan University, School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, and School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
| | - Jiazhong Sun
- Department of Endocrinology, Zhongnan Hospital of Wuhan University, School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
| | - Wenqing Chen
- Department of Endocrinology, Zhongnan Hospital of Wuhan University, School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
- Abichem Biotech Joint Center for Pharmaceutical Innovation, Wuhan University, Wuhan 430071, China
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, and School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
| | - Zhengyu Zhang
- Department of Endocrinology, Zhongnan Hospital of Wuhan University, School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, and School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
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Huang Q, Jiang C, Sun J, Xue J, Zhang VW. Case report: A novel mutation in TRPS1 identified in a Chinese family with tricho-rhino-phalangeal syndrome I: A therapeutic challenge. Front Pediatr 2022; 10:990230. [PMID: 36467473 PMCID: PMC9716017 DOI: 10.3389/fped.2022.990230] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Accepted: 11/02/2022] [Indexed: 11/19/2022] Open
Abstract
Tricho-rhino-phalangeal syndrome (TRPS) is a rare autosomal dominant malformation caused by mutations involving the TRPS1 gene. Patients with TRPS exhibit distinctive craniofacial and skeletal abnormalities. This report presents three intra-familial cases with TRPS1 gene mutations that showed the characteristic features of TRPS. A 13-year-old boy was admitted to Department of Endocrinology for the evaluation of short stature. Physical examination revealed that the boy had thin sparse hair, pear-shaped nose, protruding ears, small jaw and brachydactyly. A survey of his family history indicated that the boy's sister and mother shared the same clinical features. Radiological techniques demonstrated a different degree of skeletal abnormalities in these siblings. Next-generation sequencing and quantitative PCR were performed and showed a novel deletion mutation in exons 3-5 in the three familial cases, confirming the diagnosis of TRPS I. The healthy father did not carry the deletion mutation. Currently, there was no specific therapy for TRPS I; however, genetic consultation may be useful for family planning.
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Affiliation(s)
- Qi Huang
- Department of Endocrinology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Cheng Jiang
- Emergency Center, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Jiazhong Sun
- Department of Endocrinology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Junli Xue
- Department of Endocrinology, The Second Clinical Medical College, Yangtze University, Jingzhou, China
| | - Victor Wei Zhang
- Department of Clinical Genetics, AmCare Genomics Lab, Guangzhou, China
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Chen L, Liu C, Gao J, Xie Z, Chan LWC, Keating DJ, Yang Y, Sun J, Zhou F, Wei Y, Men X, Yang S. Inhibition of Miro1 disturbs mitophagy and pancreatic β-cell function interfering insulin release via IRS-Akt-Foxo1 in diabetes. Oncotarget 2017; 8:90693-90705. [PMID: 29207597 PMCID: PMC5710878 DOI: 10.18632/oncotarget.20963] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Accepted: 08/29/2017] [Indexed: 11/25/2022] Open
Abstract
Mitochondrial function is essential to meet metabolic demand of pancreatic beta cells respond to high nutrient stress. Mitophagy is an essential component to normal pancreatic β-cell function and has been associated with β-cell failure in Type 2 diabetes (T2D). Our previous studies have indicated that mitochondrial Rho (Miro) GTPase-mediated mitochondrial dysfunction under high nutrient stress leads to NOD-like receptor 3 (NLRP3)-dependent proinflammatory responses and subsequent insulin resistance. However, the in vivo mechanism by which Miro1 underlies mitophagy has not been identified. Here we show firstly that the expression of Miro is reduced in human T2D and mouse db/db islets and in INS-1 cell line exposed to high glucose and palmitate. β-cell specific ablation of Miro1 (Miro1f/f: Rip-cre mice, or (IKO) under high nutrient stress promotes the development of hyperglycemia. β-cells from IKO mice display an inhibition of mitophagy under oxidative stress and induces mitochondrial dysfunction. Dysfunctional mitophagy in IKO mice is represented by damaged islet beta cell mitochondrial and secretory capacity, unbalanced downstream MKK-JNK signalling without affecting the levels of MEK, ERK or p38 activation and subsequently, impaired insulin secretion signaling via inhibition IRS-AKT-Foxo1 pathway, leading to worsening glucose tolerance in these mice. Thus, these data suggest that Miro1 may be responsible for mitophagy deficiency and β-cell dysfunction in T2D and that strategies target Miro1 in vivo may provide a therapeutic target to enhance β-cell mitochondrial quality and insulin secretion to ameliorate complications associated with T2D.
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Affiliation(s)
- Lingling Chen
- ABSL-3 Laboratory at the Center for Animal Experiment and Institute of Animal Model for Human Disease, Wuhan University School of Medicine, Wuhan, P. R. China.,Department of Cell Biology, College of Life Science, Nanjing Normal University, Nanjing, Jiangsu, P.R. China
| | - Chunyan Liu
- ABSL-3 Laboratory at the Center for Animal Experiment and Institute of Animal Model for Human Disease, Wuhan University School of Medicine, Wuhan, P. R. China
| | - Jianfeng Gao
- ABSL-3 Laboratory at the Center for Animal Experiment and Institute of Animal Model for Human Disease, Wuhan University School of Medicine, Wuhan, P. R. China
| | - Zhiwen Xie
- School of Bioscience and Technology , Weifang Medical University, Weifang Shandong, P.R. China
| | - Lawrence W C Chan
- Department of Health Technology and Informatics, Hong Kong Polytechnic University, Hong Kong, Hong Kong
| | - Damien J Keating
- Department of Human Physiology and Centre for Neuroscience, Flinders University, Adelaide, South Australia, Australia
| | - Yibin Yang
- Department of Endocrinology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, P.R. China
| | - Jiazhong Sun
- Department of Respiratory, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, P.R. China
| | - Fuling Zhou
- Department of Hematology and Radiation, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, P.R. China
| | - Yongchang Wei
- Department of Medical Oncology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, P.R. China
| | - Xiuli Men
- School of Basic Medical Sciences, North China University of Science and Technology, Tangshan, P.R. China
| | - Sijun Yang
- ABSL-3 Laboratory at the Center for Animal Experiment and Institute of Animal Model for Human Disease, Wuhan University School of Medicine, Wuhan, P. R. China
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Sun JZ. Ramularia coleosporii (Mycosphaerella) on Plumeria rust in Thailand. SIF 2017. [DOI: 10.5943/sif/2/1/5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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Cao ZG, Wang ZH, Sun JZ, Liu M, Zhou XY, Yang QM. [A case report of refractory ALK-positive anaplastic large cell lymphoma treated with Brentuximab vedotin]. Zhonghua Zhong Liu Za Zhi 2016; 38:715-6. [PMID: 27647407 DOI: 10.3760/cma.j.issn.0253-3766.2016.09.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Z G Cao
- Department of Geriatric Hematology, First Affiliated Hospital of Chinese PLA General Hospital, Beijing 100048, China
| | - Z H Wang
- Department of Geriatric Hematology, First Affiliated Hospital of Chinese PLA General Hospital, Beijing 100048, China
| | - J Z Sun
- Department of Geriatric Hematology, First Affiliated Hospital of Chinese PLA General Hospital, Beijing 100048, China
| | - M Liu
- Department of Geriatric Hematology, First Affiliated Hospital of Chinese PLA General Hospital, Beijing 100048, China
| | - X Y Zhou
- Department of Geriatric Hematology, First Affiliated Hospital of Chinese PLA General Hospital, Beijing 100048, China
| | - Q M Yang
- Department of Biotherapeutics, General Hospital of People's Liberation Army, Beijing 100853, China
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Sun Y, Sun J, Wu J, Yang M. Combined effects of FTO rs9939609 and MC4R rs17782313 on elevated nocturnal blood pressure in the Chinese Han population. Cardiovasc J Afr 2015; 27:21-4. [PMID: 26324055 PMCID: PMC4816968 DOI: 10.5830/cvja-2015-064] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [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: 09/06/2014] [Accepted: 08/11/2015] [Indexed: 11/06/2022] Open
Abstract
AIM In this study we investigated the association of FTO rs9939609 and MC4R rs17782313 with elevated blood pressure in the Chinese Han population, and analysed the relationship between the rs9939609 and rs17782313 variants. METHODS We tested the rs9939609 and rs17782313 variants with the sequence-retrieval method. RESULTS The increase in odds ratios of the A allele of rs9939609 and the C allele of rs17782313 for nocturnal blood pressure were 1.37 and 1.69. The nocturnal blood pressure of participants simultaneously carrying the A and C alleles was significantly higher than the blood pressure of those carrying neither FTO nor MC4R risk alleles (p < 0.05), and that of the controls carrying only the A or C alleles (p < 0.05). No association between the FTO or MC4R genes with daytime hypertension was found in this Chinese population (p > 0.05). CONCLUSION Our data suggest that the rs9939609 and rs17782313 variants may be significantly associated with nocturnal but not daytime blood pressure levels and their combined effects were significant in this Chinese Han population.
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Affiliation(s)
- Yanlei Sun
- Department of Endocrinology, the Third Hospital of Wuhan, Wuhan, China, 430060.
| | - Jiazhong Sun
- Department of Endocrinology, Zhongnan Hospital, Wuhan University, Wuhan, China, 430071
| | - Jun Wu
- Department of Endocrinology, the Third Hospital of Wuhan, Wuhan, China, 430060
| | - Mei Yang
- Department of Endocrinology, Zhongnan Hospital, Wuhan University, Wuhan, China, 430071
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Li X, Jiang L, Yang M, Wu YW, Sun JZ, Sun SX. Białko CTRP3 zwiększa wrażliwość na insulinę adipocytów 3T3-L1 przez hamowanie procesu zapalnego i poprawę przekazywania sygnału insulinowego. Endokrynologia Polska 2014; 65:252-8. [DOI: 10.5603/ep.2014.0034] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Revised: 04/07/2014] [Accepted: 04/18/2014] [Indexed: 11/25/2022]
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9
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Lu L, Fan D, Bie BX, Ran XX, Qi ML, Parab N, Sun JZ, Liao HJ, Hudspeth MC, Claus B, Fezzaa K, Sun T, Chen W, Gong XL, Luo SN. Note: Dynamic strain field mapping with synchrotron X-ray digital image correlation. Rev Sci Instrum 2014; 85:076101. [PMID: 25085186 DOI: 10.1063/1.4887343] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We present a dynamic strain field mapping method based on synchrotron X-ray digital image correlation (XDIC). Synchrotron X-ray sources are advantageous for imaging with exceptional spatial and temporal resolutions, and X-ray speckles can be produced either from surface roughness or internal inhomogeneities. Combining speckled X-ray imaging with DIC allows one to map strain fields with high resolutions. Based on experiments on void growth in Al and deformation of a granular material during Kolsky bar/gas gun loading at the Advanced Photon Source beamline 32ID, we demonstrate the feasibility of dynamic XDIC. XDIC is particularly useful for dynamic, in-volume, measurements on opaque materials under high strain-rate, large, deformation.
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Affiliation(s)
- L Lu
- CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China, Hefei, Anhui 230027, People's Republic of China
| | - D Fan
- The Peac Institute of Multiscale Sciences, Chengdu, Sichuan 610207, People's Republic of China
| | - B X Bie
- The Peac Institute of Multiscale Sciences, Chengdu, Sichuan 610207, People's Republic of China
| | - X X Ran
- School of Science, Wuhan University of Technology, Wuhan, Hubei 430070, People's Republic of China
| | - M L Qi
- School of Science, Wuhan University of Technology, Wuhan, Hubei 430070, People's Republic of China
| | - N Parab
- School of Aeronautics and Astronautics, Purdue University, West Lafayette, Indiana 47907, USA
| | - J Z Sun
- School of Aeronautics and Astronautics, Purdue University, West Lafayette, Indiana 47907, USA
| | - H J Liao
- School of Aeronautics and Astronautics, Purdue University, West Lafayette, Indiana 47907, USA
| | - M C Hudspeth
- School of Aeronautics and Astronautics, Purdue University, West Lafayette, Indiana 47907, USA
| | - B Claus
- School of Aeronautics and Astronautics, Purdue University, West Lafayette, Indiana 47907, USA
| | - K Fezzaa
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - T Sun
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - W Chen
- School of Aeronautics and Astronautics, Purdue University, West Lafayette, Indiana 47907, USA
| | - X L Gong
- CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China, Hefei, Anhui 230027, People's Republic of China
| | - S N Luo
- The Peac Institute of Multiscale Sciences, Chengdu, Sichuan 610207, People's Republic of China
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Abstract
The objective of this study was to investigate the impact of C1q/TNF related protein 3 (CTRP3), a novel adipokine, on the expression and secretion of adiponectin, leptin, visfatin, and apelin in 3T3-L1 adipocytes. The effect of insulin resistance on the impact was also investigated. 3T3-L1 adipocytes were treated with different concentrations (0, 10, 50, 250, 1250 ng/mL) CTRP3 for 12 h, and with 250 ng/mL CTRP3 for different times (0, 6, 12, 24, 48 h). The expression of adipokines between normal and insulin resistant adipocytes, as well as between the adipocytes pre-treated with and without Compound C were compared. The secretion and gene expression of the adipokines were detected by enzyme-linked immunosorbent assay (ELISA) and real-time polymerase chain reaction (RT-PCR), respectively. The relative expression of AMPK (thr172) was detected by western blot analysis. With the increase in CTRP3 concentration or the duration of the treatment, the secretion of adiponectin, leptin, visfatin and apelin were all increased accordingly, which was significant under the treatment with 250 ng/mL and 1250 ng/mL CTRP3 for 12 h as well as 250 ng/mL CTRP3 for 12 h, 24 h and 48 h. Gene expression showed a similar trend. The secretion and gene expression of adipokines in insulin resistant adipocytes were all decreased significantly in comparison with that of normal adipocytes. The secretion secretion and gene expression of adiponectin, and the relative expression of AMPK (thr172) in adipocytes pre-treated with Compound C were decreased significantly in comparison with that in adipocytes without Compound C pretreatment. Thus, CTRP3 increased the expression and secretion of adiponectin, leptin, visfatin, and apelin in 3T3-L1 adipocytes, while insulin resistance inhibited the effects. CTRP3 up-regulated the expression of adiponectin in 3T3-L1 adipocytes through AMPK signaling pathway.
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Affiliation(s)
- Xin Li
- Department of Endocrinology, Zhongnan Hospital, Wuhan University, Wuhan 430071, China
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Li X, Jiang L, Yang M, Wu YW, Sun SX, Sun JZ. Expression of CTRP3, a novel adipokine, in rats at different pathogenic stages of type 2 diabetes mellitus and the impacts of GLP-1 receptor agonist on it. J Diabetes Res 2014; 2014:398518. [PMID: 25177707 PMCID: PMC4142547 DOI: 10.1155/2014/398518] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Revised: 07/19/2014] [Accepted: 07/24/2014] [Indexed: 01/23/2023] Open
Abstract
This study aimed to investigate the expression of C1q/TNF-related protein-3 (CTRP3) in rats at different pathogenic stages of type 2 diabetes mellitus (T2DM) and the impacts of glucagon-like peptide-1 (GLP-1) receptor agonist on it. Male wistar rats were fed with high-fat diet for 10 weeks to induce insulin resistance (IR) and then were given low-dose streptozotocin (STZ) intraperitoneal injection to induce T2DM. Exendin-4 (Ex-4), a GLP-1 receptor agonist, was subcutaneous injected to the IR rats and T2DM rats for 4 weeks. The expression of CTRP3 mRNA and protein in epididymis adipose tissue of rats at the stage of IR was lower significantly than that of normal control (NC) rats and decreased more when they were at the stage of overt T2DM (all P < 0.05 or P < 0.01). After the treatment with Ex-4, the mRNA and protein expressions of CTRP3 were increased by 15.5% (P < 0.01) and 14.8% (P < 0.05), respectively, in IR rats and increased by 20.6% (P < 0.01) and 16.5% (P < 0.05), respectively, in T2DM rats. Overall, this study found that the expression of CTRP3 in visceral adipose tissue was progressively decreased in a T2DM rat model from the pathogenic stage of IR to overt diabetes, while Ex-4 treatment increased its expression in such animals.
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MESH Headings
- Adipokines/genetics
- Adipokines/metabolism
- Animals
- Diabetes Mellitus, Experimental/chemically induced
- Diabetes Mellitus, Experimental/drug therapy
- Diabetes Mellitus, Experimental/genetics
- Diabetes Mellitus, Experimental/metabolism
- Diabetes Mellitus, Type 2/chemically induced
- Diabetes Mellitus, Type 2/drug therapy
- Diabetes Mellitus, Type 2/genetics
- Diabetes Mellitus, Type 2/metabolism
- Diet, High-Fat
- Disease Progression
- Exenatide
- Gene Expression Regulation
- Glucagon-Like Peptide-1 Receptor
- Hypoglycemic Agents/pharmacology
- Insulin Resistance
- Intra-Abdominal Fat/drug effects
- Intra-Abdominal Fat/metabolism
- Male
- Peptides/pharmacology
- RNA, Messenger/metabolism
- Rats, Wistar
- Receptors, Glucagon/agonists
- Receptors, Glucagon/metabolism
- Streptozocin
- Time Factors
- Venoms/pharmacology
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Affiliation(s)
- Xin Li
- Department of Endocrinology, Zhongnan Hospital, Wuhan University, Wuhan 430071, China
- *Xin Li:
| | - Li Jiang
- Department of Internal Medicine, Zhongnan Hospital, Wuhan University, Wuhan 430071, China
| | - Miao Yang
- Department of Endocrinology, Zhongnan Hospital, Wuhan University, Wuhan 430071, China
| | - Yu-wen Wu
- Department of Endocrinology, Zhongnan Hospital, Wuhan University, Wuhan 430071, China
| | - Su-xin Sun
- Department of Endocrinology, Zhongnan Hospital, Wuhan University, Wuhan 430071, China
| | - Jia-zhong Sun
- Department of Endocrinology, Zhongnan Hospital, Wuhan University, Wuhan 430071, China
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Zou R, Yang L, Xue J, Ke M, Huang Q, Huang Q, Dai Z, Sun J, Xu Y. WITHDRAWN: RIP140 mediates hyperglycemia-induced glucotoxicity in β-cells via the activation of JNK and ERK1/2 signaling pathways. Diabetes Res Clin Pract 2013:S0168-8227(12)00506-2. [PMID: 23290273 DOI: 10.1016/j.diabres.2012.12.008] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2012] [Revised: 10/22/2012] [Accepted: 12/13/2012] [Indexed: 10/27/2022]
Abstract
This article has been withdrawn at the request of the author(s) and/or editor. The Publisher apologizes for any inconvenience this may cause. The full Elsevier Policy on Article Withdrawal can be found at http://www.elsevier.com/locate/withdrawalpolicy.
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Affiliation(s)
- Runmei Zou
- Department of Endocrinology, Zhongnan Hospital of Wuhan University, Donghu Road 169#, Wuhan, Hubei 430071, China
| | - Li Yang
- Department of Endocrinology, Zhongnan Hospital of Wuhan University, Donghu Road 169#, Wuhan, Hubei 430071, China
| | - Junli Xue
- Department of Endocrinology, Zhongnan Hospital of Wuhan University, Donghu Road 169#, Wuhan, Hubei 430071, China
| | - Min Ke
- Department of Ophthalmology, Zhongnan Hospital of Wuhan University, Donghu Road 169#, Wuhan, Hubei 430071, China
| | - Qian Huang
- Department of Paediatrics, Zhongnan Hospital of Wuhan University, Donghu Road 169#, Wuhan, Hubei 430071, China
| | - Qi Huang
- Department of Endocrinology, Zhongnan Hospital of Wuhan University, Donghu Road 169#, Wuhan, Hubei 430071, China
| | - Zhe Dai
- Department of Endocrinology, Zhongnan Hospital of Wuhan University, Donghu Road 169#, Wuhan, Hubei 430071, China
| | - Jiazhong Sun
- Department of Endocrinology, Zhongnan Hospital of Wuhan University, Donghu Road 169#, Wuhan, Hubei 430071, China
| | - Yancheng Xu
- Department of Endocrinology, Zhongnan Hospital of Wuhan University, Donghu Road 169#, Wuhan, Hubei 430071, China.
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13
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Yang M, Sun JZ, Sun YL, You W, Dai J, Li GS. [Association between leptin gene promoter methylation and type 2 diabetes mellitus]. Zhonghua Yi Xue Yi Chuan Xue Za Zhi 2012; 29:474-7. [PMID: 22875510 DOI: 10.3760/cma.j.issn.1003-9406.2012.04.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To assess the association between leptin gene promoter methylation and serum leptin concentrations in patients with impaired glucose regulation (IGR) and type 2 diabetes mellitus (T2DM). METHODS Methylation status of leptin gene promoter was determined with methylation-specific polymerase chain reaction. Serum leptin concentrations were determined using enzyme-linked immunosorbent assay. RESULTS Among three groups of individuals with different levels of glucose, the methylation rates of leptin gene in IGR and T2DM groups were 43.6 % and 31.5 %, respectively, which were significantly lower than that of healthy subjects (59.2%; Chi-square=22.499 and 5.109, respectively, P<0.05). A lower methylation rate was also observed in T2DM group compared with IGR group (Chi-square=3.962, P<0.05). Leptin levels in both T2DM and IGR groups were elevated compared with normoglycemic subjects, but only T2DM group was significantly higher (q=6.81, P<0.01). Linear regression analysis indicated that serum leptin concentrations has increased along with declining of DNA methylation rate (r=-0.95, P<0.01). CONCLUSION Lower levels of leptin gene promoter DNA methylation and serum leptin concentrations are associated with the development of diabetes. Measurement of the methylation status of leptin gene promoter and expression can facilitate early intervention of the disease.
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Affiliation(s)
- Mei Yang
- Department of Endocrinology,Zhongnan Hospital, Wuhan University, Wuhan, Hubei, People's Republic of China
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Xue L, Wang C, Cui YT, Liu L, Swander A, Sun JZ, Buhrman RA, Ralph DC. Resonance measurement of nonlocal spin torque in a three-terminal magnetic device. Phys Rev Lett 2012; 108:147201. [PMID: 22540819 DOI: 10.1103/physrevlett.108.147201] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2011] [Indexed: 05/31/2023]
Abstract
A pure spin current generated within a nonlocal spin valve can exert a spin-transfer torque on a nanomagnet. This nonlocal torque enables new design schemes for magnetic memory devices that do not require the application of large voltages across tunnel barriers that can suffer electrical breakdown. Here we report a quantitative measurement of this nonlocal spin torque using spin-torque-driven ferromagnetic resonance. Our measurement agrees well with the prediction of an effective circuit model for spin transport. Based on this model, we suggest strategies for optimizing the strength of nonlocal torque.
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Affiliation(s)
- Lin Xue
- Cornell University, Ithaca, New York 14853, USA
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Li Q, Li H, Li R, Jing B, Liu Z, Li W, Luan F, Cheng J, Gong B, Sun J. Correction to “Influence of Hybridization and Cooperativity on the Properties of Au-Bonding Interaction: Comparison with Hydrogen Bonds”. J Phys Chem A 2011. [DOI: 10.1021/jp205669u] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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16
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Jing B, Li QZ, Gong BA, Liu ZB, Li WZ, Cheng JB, Sun JZ. The prominent enhancing effect and mechanism of the methyl group in the X···Y (X=O, S, H3CO, H3CS, (H3C)2O, (H3C)2S; Y=HCN, HNC) hydrogen-bonded complex. Mol Phys 2011. [DOI: 10.1080/00268976.2011.554899] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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17
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Li Q, Li H, Li R, Jing B, Liu Z, Li W, Luan F, Cheng J, Gong B, Sun J. Influence of Hybridization and Cooperativity on the Properties of Au-Bonding Interaction: Comparison with Hydrogen Bonds. J Phys Chem A 2011; 115:2853-8. [DOI: 10.1021/jp110777g] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Qingzhong Li
- The Laboratory of Theoretical and Computational Chemistry, Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, People's Republic of China
| | - Hui Li
- The Laboratory of Theoretical and Computational Chemistry, Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, People's Republic of China
| | - Ran Li
- The Laboratory of Theoretical and Computational Chemistry, Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, People's Republic of China
| | - Bo Jing
- The Laboratory of Theoretical and Computational Chemistry, Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, People's Republic of China
| | - Zhenbo Liu
- The Laboratory of Theoretical and Computational Chemistry, Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, People's Republic of China
| | - Wenzuo Li
- The Laboratory of Theoretical and Computational Chemistry, Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, People's Republic of China
| | - Feng Luan
- The Laboratory of Theoretical and Computational Chemistry, Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, People's Republic of China
| | - Jianbo Cheng
- The Laboratory of Theoretical and Computational Chemistry, Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, People's Republic of China
| | - Baoan Gong
- The Laboratory of Theoretical and Computational Chemistry, Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, People's Republic of China
| | - Jiazhong Sun
- The Laboratory of Theoretical and Computational Chemistry, Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, People's Republic of China
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Huang W, Sun Y, Sun J. Combined effects of FTO rs9939609 and MC4R rs17782313 on obesity and BMI in Chinese Han populations. Endocrine 2011; 39:69-74. [PMID: 21063808 DOI: 10.1007/s12020-010-9413-6] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2010] [Accepted: 10/05/2010] [Indexed: 11/29/2022]
Abstract
Genetic variants of FTO and MC4R have been linked with obesity and T2DM in populations of Europeans. In this study, we have investigated the association of FTO rs9939609 and MC4R rs17782313 with obesity and T2DM in the Chinese population and analyzed the relationship between rs9939609 and rs17782313. 2351 individuals were recruited. We tested the rs9939609 and rs17782313 by sequences retrieval method. Clinical and biochemical characteristics were measured. The rs9939609 per-A allele and rs17782313 per-C allele increases of OR for obesity was 1.42 (95% CI 1.39-3.74) and 1.39 (95% CI 1.21-3.53).The genotypic OR for obesity was 1.92 (95% CI 1.81-4.67) for AA genotype, 1.71 (95% CI 1.47-4.54) for AT genotype, 1.87 (95% CI 1.72-4.00) for CC genotype, and 1.44 (95% CI 1.20-3.18) for CT genotype. BMI of participants carrying neither FTO nor MC4R risk allele was 25.9 ± 4.9, one risk allele was 26.4 ± 5.1, two risk alleles was 28.1 ± 5.5, and there or four risk alleles was 33.2 ± 6.3. We found no association between FTO and MC4R and the Chinese population with T2DM (P > 0.05). Our data support that the rs9939609 and rs17782313 are strongly associated with obesity and BMI. Their combined effects were significant in Chinese population. No association between FTO and MC4R and Chinese population with T2DM was found.
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Affiliation(s)
- Wei Huang
- Division of Endocrinology, Department of Puren Hospital, Wuhan University of Science and Technology, Wuhan, China
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Sun Y, Sun J, Wang X, You W, Yang M. Variants in the fat mass and obesity associated (FTO) gene are associated with obesity and C-reactive protein levels in Chinese Han populations. ACTA ACUST UNITED AC 2010; 33:E405-12. [PMID: 21134343 DOI: 10.25011/cim.v33i6.14592] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2010] [Indexed: 11/03/2022]
Abstract
PURPOSE Various genetic variants of the fat mass and obesity associated gene (FTO) have been linked to obesity in populations of Europeans. Low-grade inflammation is a key feature of obesity, characterized by elevated plasma levels of C-reactive protein (CRP). In the present study, we have investigated whether the FTO-risk variant is associated with obesity and CRP in the Chinese population. METHODS 1799 individuals aged 50-70 years (896 men and 903 women), including both obese (560 cases) and control individuals, (1200 cases) were recruited. The FTO rs9939609 polymorphism was tested using sequences retrieval. Waist circumference, body fat, hs-CRP, blood total cholesterol, triglycerides and LDL-C were also measured. RESULTS The FTO rs9939609 polymorphism per-A allele was associated with an increased odds ratio for obesity of 1.42 (95%CI 1.23-1.64). The genotypic odds ratio for obesity was 1.92 (95%CI 1.43-2.57) for the AA genotype, 1.71 (95%CI 1.35-2.16) for the AT genotype. The association between FTO rs9939609 polymorphism and CRP levels was r=0.78. CONCLUSION Our data support the hypothesis that FTO rs9939609 polymorphism is strongly associated with obesity and CRP levels in the Chinese population as reported in the European population.
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Affiliation(s)
- Yanlei Sun
- Department of Endocrinology, Zhongnan Hospital, Wuhan University, Wuhan, China
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Li Q, Li H, Jing B, Li R, Liu Z, Li W, Luan F, Cheng J, Gong B, Sun J. Partially covalent nature and substitution non-additivity of Au-bonding in H2O–AuCH3 complex. Chem Phys Lett 2010. [DOI: 10.1016/j.cplett.2010.08.088] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Li Q, Liu Z, Jing B, Li W, Cheng J, Gong B, Sun J. Large blue shift of the H-Ar stretching frequency in hydrogen- and halogen-bonded complexes of HArF with dihalogen molecules. Spectrochim Acta A Mol Biomol Spectrosc 2010; 77:506-511. [PMID: 20634128 DOI: 10.1016/j.saa.2010.06.027] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2010] [Revised: 06/02/2010] [Accepted: 06/17/2010] [Indexed: 05/29/2023]
Abstract
Quantum chemical calculations have been performed on the complexes formed between HArF and dihalogen molecules (XY=ClCl, ClF, BrCl, and BrF) at the MP2/6-311++G(2d,2p) level. For each complex, two minima were found, which correspond to one hydrogen-bonded complex and one halogen-bonded complex. The halogen-bonded complex with the F atom of HArF is more stable than the hydrogen-bonded complex with the H atom of HArF. A large blue shift of the H-Ar stretching frequency was observed in the hydrogen-bonded complex. However, in the halogen-bonded complex, in which the H-Ar bond is not involved in the interaction, a much large blue shift was observed for the same bond. The natural bond orbital and atoms in molecules analyses have been performed for these complexes. The energy decomposition analysis indicated that the electrostatic interaction plays a main contribution in formation of both complexes although the contribution from the charge-transfer interaction is also important.
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Affiliation(s)
- Qingzhong Li
- The Laboratory of Theoretical and Computational Chemistry, Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, PR China.
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Li Q, Jing B, Liu Z, Li W, Cheng J, Gong B, Sun J. Surprising enhancing effect of methyl group on the strength of O⋯XF and S⋯XF (X=Cl and Br) halogen bonds. J Chem Phys 2010; 133:114303. [DOI: 10.1063/1.3479398] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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23
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Cheng J, Li R, Li Q, Jing B, Liu Z, Li W, Gong B, Sun J. Prominent Effect of Alkali Metals in Halogen-Bonded Complex of MCCBr−NCM′ (M and M′ = H, Li, Na, F, NH2, and CH3). J Phys Chem A 2010; 114:10320-5. [DOI: 10.1021/jp105891c] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jianbo Cheng
- The Laboratory of Theoretical and Computational Chemistry, Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, People’s Republic of China
| | - Ran Li
- The Laboratory of Theoretical and Computational Chemistry, Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, People’s Republic of China
| | - Qingzhong Li
- The Laboratory of Theoretical and Computational Chemistry, Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, People’s Republic of China
| | - Bo Jing
- The Laboratory of Theoretical and Computational Chemistry, Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, People’s Republic of China
| | - Zhenbo Liu
- The Laboratory of Theoretical and Computational Chemistry, Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, People’s Republic of China
| | - Wenzuo Li
- The Laboratory of Theoretical and Computational Chemistry, Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, People’s Republic of China
| | - Baoan Gong
- The Laboratory of Theoretical and Computational Chemistry, Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, People’s Republic of China
| | - Jiazhong Sun
- The Laboratory of Theoretical and Computational Chemistry, Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, People’s Republic of China
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Sun J, Xu Y, Deng H, Sun S, Dai Z, Sun Y. Involvement of osteopontin upregulation on mesangial cells growth and collagen synthesis induced by intermittent high glucose. J Cell Biochem 2010; 109:1210-21. [PMID: 20135641 DOI: 10.1002/jcb.22503] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Glucose fluctuations are strong predictor of diabetic vascular complications. We explored the effects of constant and intermittent high glucose on the proliferation and collagen synthesis of cultured rat mesangial cells. Furthermore, the possible involvement of osteopontin (OPN) was assessed. In rat mesangial cells cultured in 5, 25, or 5 mmol/L alternating with 25 mmol/L glucose in the absence or presence of neutralizing antibodies to OPN, beta3 integrin receptor and beta5 integrin receptor, the cell proliferation, collagen synthesis, and the expression of OPN and type IV collagen were assessed. In cultured mesangial cells, treatment with constant or intermittent high glucose significantly increased [(3)H]thymidine incorporation in a time-dependent manner. A modest increase was observed at 12 h, and further deteriorated afterwards, and reached the maximum incorporation at 48 h. Treatment with constant high glucose for 48 h resulted in significant increases in [(3)H]thymidine incorporation, cell number, [(3)H]proline incorporation, mRNA, and protein levels of type IV collagen and OPN compared with mesangial cells treated with the normal glucose, which were markedly enhanced in cells exposed to intermittent high glucose medium. In addition, neutralizing antibodies to either OPN or its receptor beta3 integrin but not neutralizing antibodies to beta5 integrin can effectively prevented proliferation and collagen synthesis of mesangial cells induced by constant or intermittent high glucose. Intermittent high glucose exacerbates mesangial cells growth and collagen synthesis by upregulation of OPN expression, indicating that glycemic variability have important pathological effects on the development of diabetic nephropathy, which is mediated by the stimulation of OPN expression and synthesis.
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Affiliation(s)
- Jiazhong Sun
- Department of Endocrinology, Zhongnan Hospital, Wuhan University, Wuhan 430071, China.
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25
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Sun J, Xu Y, Sun S, Sun Y, Wang X. Intermittent high glucose enhances cell proliferation and VEGF expression in retinal endothelial cells: the role of mitochondrial reactive oxygen species. Mol Cell Biochem 2010; 343:27-35. [PMID: 20524146 DOI: 10.1007/s11010-010-0495-5] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2010] [Accepted: 05/12/2010] [Indexed: 12/18/2022]
Abstract
Proliferation of human retinal endothelial cells (HRECs) is an important event in the development of diabetic retinopathy. Glucose fluctuations are strong predictor of diabetic vascular complications. In this study we have investigated the effect of intermittent high glucose on proliferation and expression of vascular endothelial growth factor (VEGF) in HRECs. The possible involvement of mitochondrial reactive oxygen species (ROS) was assessed. HRECs were incubated for 72 h in media containing different glucose concentrations: 5, 25, 5 mmol/l alternating with 25 mmol/l glucose, with or without Mn(III)tetrakis(4-benzoic acid) porphyrin chloride (MnTBAP) and thenoyltri-fluoroacetone (TTFA). The cell proliferation, VEGF expression, mitochondrial ROS, nitrotyrosine and 8-hydroxydeoxyguanosine (8-OHdG) were measured. In cultured HRECs, treatment with constant or intermittent high glucose significantly increased [(3)H]thymidine incorporation in a time-dependent manner. Treatment with constant high glucose for 48 h resulted in significant increases in [(3)H]thymidine incorporation, mRNA and protein levels of VEGF compared with HRECs treated with the normal glucose, which were markedly enhanced in cells exposed to intermittent high glucose. The levels of mitochondrial ROS, nitrotyrosine and 8-OhdG were significantly elevated under both intermittent and constant high glucose conditions, the effect being greater under intermittent high glucose. In addition, the antioxidants MnTBAP or TTFA can effectively prevent cell proliferation and overexpression of VEGF, as well as overproduction of mitochondrial ROS, nitrotyrosine and 8-OhdG in HRECs induced by constant or intermittent high glucose. Intermittent high glucose enhances cell proliferation and overexpression of VEGF through reactive oxygen species (ROS) overproduction at the mitochondrial transport chain level in HRECs, indicating that glycemic variability have important pathological effects on the development of diabetic retinopathy dependent of mitochondrial ROS.
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Affiliation(s)
- Jiazhong Sun
- Department of Endocrinology, Zhongnan Hospital, Wuhan University, Wuhan, China.
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Li Q, Wang H, Liu Z, Li W, Cheng J, Gong B, Sun J. Ab initio study of lithium-bonded complexes with carbene as an electron donor. J Phys Chem A 2010; 113:14156-60. [PMID: 19950950 DOI: 10.1021/jp9063214] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The complexes H(2)C-LiX (X = H, OH, F, Cl, Br, CN, NC, CH(3), C(2)H(3), C(2)H, NH(2)) have been studied with quantum chemical calculations at the MP2/6-311++G(d,p) level. A new type of lithium bond was proposed, in which the carbene acts as the electron donor. This new type of lithium bond was characterized in view of the geometrical, spectral and energetic parameters. The Li-X bond elongates in all lithium bonded complexes. The Li-X stretch vibration has a red shift in the complexes H(2)C-LiX (X = H, OH, F); however, it exhibits a blue shift in the complexes H(2)C-LiX (X = Cl, Br, CN, NC, CH(3), C(2)H(3), C(2)H, NH(2)). The binding energies are in a range of 16.88-21.13 kcal/mol, indicating that the carbene is a good electron donor in the interaction. The energy decomposition analyses show that the electrostatic contribution is largest, polarization counterpart is followed, and charge transfer is smallest. The effect of substitution and hybridization on this type of lithium bond has also been investigated.
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Affiliation(s)
- Qingzhong Li
- The Laboratory of Theoretical and Computational Chemistry, Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, People's Republic of China.
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Li Q, Yuan H, Jing B, Liu Z, Li W, Cheng J, Gong B, Sun J. Theoretical study of halogen–hydride halogen bonds in F3CL ··· HM (L=Cl, Br; M=Li, BeH, MgH) complexes. Mol Phys 2010. [DOI: 10.1080/00268971003630703] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Li Q, Hu T, An X, Li W, Cheng J, Gong B, Sun J. Theoretical study of the interplay between lithium bond and hydrogen bond in complexes involved with HLi and HCN. Chemphyschem 2010; 10:3310-5. [PMID: 19830767 DOI: 10.1002/cphc.200900549] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The lithium- and hydrogen-bonded complex of HLi-NCH-NCH is studied with ab initio calculations. The optimized structure, vibrational frequencies, and binding energy are calculated at the MP2 level with 6-311++G(2d,2p) basis set. The interplay between lithium bonding and hydrogen bonding in the complex is investigated with these properties. The effect of lithium bonding on the properties of hydrogen bonding is larger than that of hydrogen bonding on the properties of lithium bonding. In the trimer, the binding energies are increased by about 19% and 61% for the lithium and hydrogen bonds, respectively. A big cooperative energy (-5.50 kcal mol(-1)) is observed in the complex. Both the charge transfer and induction effect due to the electrostatic interaction are responsible for the cooperativity in the trimer. The effect of HCN chain length on the lithium bonding has been considered. The natural bond orbital and atoms in molecules analyses indicate that the electrostatic force plays a main role in the lithium bonding. A many-body interaction analysis has also been performed for HLi-(NCH)(N) (N=2-5) systems.
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Affiliation(s)
- Qingzhong Li
- The Laboratory of Theoretical and Computational Chemistry, Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, PR China.
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Sun J, Xu Y, Deng H, Sun S, Dai Z, Sun Y. Intermittent high glucose exacerbates the aberrant production of adiponectin and resistin through mitochondrial superoxide overproduction in adipocytes. J Mol Endocrinol 2010; 44:179-85. [PMID: 20154025 DOI: 10.1677/jme-09-0088] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Hypoadiponectinemia and hyperresistinemia may be important in mediating signals from adipocytes to insulin-sensitive tissue and vasculature. However, the mechanism that mediates the aberrant production of adipokines remains poorly understood. In this study, we have investigated the effect of intermittent high glucose on the expression of adiponectin and resistin, and the production of 8-hydroxydeoxyguanosine (8-OHdG) and nitrotyrosine in the adipocytes, either in the presence or in the absence of Mn(III) tetrakis(4-benzoic acid) porphyrin chloride (MnTBAP) or thenoyltrifluoroacetone (TTFA). 3T3-L1 adipocytes were incubated for 72 h in media containing different glucose concentrations: 5 mmol/l, 20 mmol/l, 5 mmol/l alternating with 20 mmol/l glucose, with or without MnTBAP and TTFA. We measured the expression of resistin and adiponectin. The production of nitrotyrosine and 8-OHdG as oxidative stress parameter was measured. Both constant and intermittent high glucose significantly suppressed the expression and secretion of adiponectin, and increased expression and secretion of resistin in mature adipocytes compared to normal glucose conditions. However, these effects were significantly greater under intermittent high glucose conditions compared to constant high glucose. The levels of nitrotyrosine and 8-OHdG were significantly elevated under both intermittent and constant high glucose conditions, the effect being greater under intermittent high glucose. In addition, the antioxidants MnTBAP or TTFA reversed the aberrant production of adiponectin and resistin, as well as overproduction of nitrotyrosine and 8-OHdG in adipocytes induced by constant or intermittent high glucose. Intermittent high glucose exacerbates the aberrant production of adiponectin and resistin through reactive oxygen species overproduction at the mitochondrial transport chain level in adipocytes, indicating that glycemic variability has important pathological effects on the secretion of adipokines.
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Affiliation(s)
- Jiazhong Sun
- Department of Endocrinology, Zhongnan Hospital, Wuhan University, Wuhan 430071, People's Republic of China.
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Li Q, Yuan H, Jing B, Liu Z, Li W, Cheng J, Gong B, Sun J. Theoretical study of halogen bonding between FnH3−nCBr (n=0, 1, 2, 3) and HMgH. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.theochem.2009.12.024] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Li Q, Xu X, Liu T, Jing B, Li W, Cheng J, Gong B, Sun J. Competition between hydrogen bond and halogen bond in complexes of formaldehyde with hypohalous acids. Phys Chem Chem Phys 2010; 12:6837-43. [DOI: 10.1039/b926355a] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Sun J, Xu Y, Dai Z, Sun Y. Intermittent high glucose stimulate MCP-l, IL-18, and PAI-1, but inhibit adiponectin expression and secretion in adipocytes dependent of ROS. Cell Biochem Biophys 2009; 55:173-80. [PMID: 19756411 DOI: 10.1007/s12013-009-9066-3] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [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: 12/15/2022]
Abstract
Elevated circulating concentrations of interleukin-18 (IL-18), monocyte chemoattractant protein-1 (MCP-1), and plasminogen activator inhibitor-1 (PAI-1) and decrease of adiponectin are associated with obesity-related diseases. The mechanism that mediates the aberrant production of the adipokines remains poorly understood. The aim of this study was to investigate the effect of intermittent high glucose on the expression of IL-18, MCP-1, and PAI-1 and adiponectin in 3T3-L1 adipocytes. 3T3-L1 adipocytes were incubated for 24 h in media containing different glucose concentrations: 5 mmol/l, 20 mmol/l and a daily alternating 5 or 20 mmol/l glucose, with or without the addition of1.0 mmol/l N-acetylcysteine (NAC). The expression and secretion of IL-18, MCP-1, PAI-1, and adiponectin were determined by real-time RT-PCR and ELISA, respectively.The production of reactive oxygen species (ROS) and 8-hydroxydeoxyguanosine(8-OHdG) were measured. Stable high glucose significantly increased expression and secretion of IL-18, MCP-1, and PAI-1, and reduced adiponectin expression and secretion compared to normal glucose conditions.These effects were significantly greater under intermittent high glucose conditions compared to stable high glucose. The level of ROS and 8-OHdG were significantly elevated under both intermittent and stable high glucose conditions, the effect being greater under intermittent high glucose. The intermittent glucose was more effective in triggering the generation of ROS than stable high glucose. The adding of the NAC, aspecific pharmacological inhibitor of ROS, normalized the expression of these adipokines and the levels of ROS and 8-OHdG under both stable and intermittent glucose conditions.Intermittent high glucose induces a greater aberrant production of key adipokines than stable high glucose, and this effect seems to be related to over-production of ROS.
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Affiliation(s)
- Jiazhong Sun
- Department of Endocrinology, Zhongnan Hospital, Wuhan University, Wuhan 430071, China.
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Luan F, Liu H, Wen Y, Li Q, Zhang X, Sun J. QSPR Study for Estimation of Density of Some Aromatic Explosives by Multiple Linear Regression Approach. Propellants, Explosives, Pyrotechnics 2009. [DOI: 10.1002/prep.200800091] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Sun J, Xu Y, Dai Z, Sun Y. Intermittent high glucose enhances proliferation of vascular smooth muscle cells by upregulating osteopontin. Mol Cell Endocrinol 2009; 313:64-9. [PMID: 19723557 DOI: 10.1016/j.mce.2009.08.019] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2009] [Revised: 08/18/2009] [Accepted: 08/25/2009] [Indexed: 11/17/2022]
Abstract
OBJECTIVE Hyperglycemia induces vascular smooth muscle cells (VSMCs) proliferation and may thus contribute to the formation of atherosclerotic lesions. Glucose fluctuations are strong predictor of diabetic vascular complications. We investigate the effects of exposure to constant and intermittent high glucose concentrations on the proliferation and matrix metalloproteinase (MMP)-2 activity of rat aortic VSMCs in culture, as well as the expression of osteopontin (OPN). METHODS Rat aortic VSMCs were grown to confluence and then exposed to 5 mmol/L glucose, 25 mmol/L glucose, or 5 mmol/L alternating with 25 mmol/L glucose in the absence or presence of neutralizing antibodies to OPN, beta3 integrin receptor and beta5 integrin receptor. The cell proliferation, MMP-2 activity and the expression of OPN were assessed. RESULTS In cultured VSMCs, treatment with constant or intermittent high glucose significantly increased [(3)H]thymidine incorporation in a time-dependent manner. A modest increase was observed at 12h, and further deteriorated afterwards, and reached the maximum expression at 48h. However, [(3)H]thymidine incorporation was more pronounced in intermittent high glucose than in constant high glucose. Treatment with constant high glucose for 48 h significantly increase cell number, MMP-2 activation, OPN protein and mRNA expression compared with VSMCs treated with the cells normal glucose, and these effects were further enhanced when VSMCs were treated with intermittent high glucose. In addition, neutralizing antibodies to either OPN or its receptor beta3 integrin but not neutralizing antibodies to beta5 integrin significantly suppressed increase in [(3)H]thymidine incorporation and MMP-2 activity induced by constant or intermittent high glucose. CONCLUSIONS In cultured VSMCs, constant high glucose concentrations enhanced MMP-2 activity, cell proliferation and OPN expression. These effects are enhanced following intermittent exposure to high glucose, indicating that short lived excursions in glycaemic control have important pathological effects on the development of diabetic atherosclerosis, which is mediated by the stimulation of OPN expression and synthesis.
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Affiliation(s)
- Jiazhong Sun
- Department of Endocrinology, Zhongnan Hospital, Wuhan University, Wuhan 430071, China.
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Li Q, An X, Cheng J, Gong B, Sun J. Ab initiostudy of the structure, cooperativity, and vibrational properties of HNC ternary complexes with two HF molecules. Mol Phys 2009. [DOI: 10.1080/00268970903025642] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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36
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Lu WS, Huang MH, Tian ZM, Yu X, Zhao QJ, Wang YM, Zhao HL, Sun JZ, Yue GH. Improved Diagnosis of Intracranial Mass Lesions by Proton MR Spectroscopy. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)70394-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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37
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Lu H, Sun J, Sun L, Shu X, Xu Y, Xie D. Polymorphism of human leptin receptor gene is associated with type 2 diabetic patients complicated with non-alcoholic fatty liver disease in China. J Gastroenterol Hepatol 2009; 24:228-32. [PMID: 18713300 DOI: 10.1111/j.1440-1746.2008.05544.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND AND AIM To investigate the relationship between human leptin receptor (LEPR) gene G3057A polymorphism and type 2 diabetes mellitus (T2DM) patients complicated with or without non-alcoholic fatty liver disease (NAFLD). METHODS Two hundred and sixteen cases of newly diagnosed T2DM patients (104 cases complicated with NAFLD) and 108 cases of normal glucose tolerances (NGT) were recruited. Hemi-nested polymerase chain reaction restriction fragment length polymorphism (PCR-RFLP) and PCR-direct sequence analysis were conducted to detect the polymorphism of LEPR G3057A variation. Plasma leptin levels were measured by enzyme-linked immunosorbent assay kit. Plasma lipid and glucose metabolic parameters were measured routinely. Liver ultrasound was carried out for all subjects. RESULTS T2DM patients complicated with NAFLD had higher plasma insulin, leptin, triglycerides (TG) and low-density lipoprotein cholesterol (LDL-C) levels than those without NAFLD and NGT subjects. The variant frequency at nucleotide 3057 G-->A transversion was 76.0% in type 2 diabetic patients complicated with NAFLD, which was also significantly higher than those without NAFLD (62.1%) and NGT cases (53.2%). There was also significant difference in genotype distribution between the three groups (chi(2) = 14.63, P < 0.01). CONCLUSION The polymorphism of LEPR gene 3057 probably contributes to the onset of NAFLD by regulating lipid metabolism and affecting insulin sensitivity.
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Affiliation(s)
- Hongyun Lu
- Department of Endocrinology, the Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, Guangdong, China.
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Li Q, Wang Y, Liu Z, Li W, Cheng J, Gong B, Sun J. An unconventional halogen bond with carbene as an electron donor: An ab initio study. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2008.12.068] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Li Q, Wang Y, Li W, Cheng J, Gong B, Sun J. Prediction and characterization of the HMgH⋯LiX (X = H, OH, F, CCH, CN, and NC) complexes: a lithium–hydride lithium bond. Phys Chem Chem Phys 2009; 11:2402-7. [DOI: 10.1039/b820309a] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Li Q, Lin Q, Li W, Cheng J, Gong B, Sun J. Cooperativity between the Halogen Bond and the Hydrogen Bond in H3N⋅⋅⋅XY⋅⋅⋅HF Complexes (X, Y=F, Cl, Br). Chemphyschem 2008; 9:2265-9. [DOI: 10.1002/cphc.200800467] [Citation(s) in RCA: 147] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Li Q, An X, Luan F, Li W, Gong B, Cheng J, Sun J. Cooperativity between two types of hydrogen bond in H3C–HCN–HCN and H3C–HNC–HNC complexes. J Chem Phys 2008; 128:154102. [DOI: 10.1063/1.2898499] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Biswas DK, Xu H, Li YG, Liu MZ, Chen YH, Sun JZ, Jiang GM. Assessing the genetic relatedness of higher ozone sensitivity of modern wheat to its wild and cultivated progenitors/relatives. J Exp Bot 2008; 59:951-963. [PMID: 18310606 DOI: 10.1093/jxb/ern022] [Citation(s) in RCA: 17] [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] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Modern wheat (Triticum aestivum L.) is one of the most ozone (O(3))-sensitive crops. However, little is known about its genetic background of O(3) sensitivity, which is fundamental for breeding O(3)-resistant cultivars. Wild and cultivated species of winter wheat including donors of the A, B and D genomes of T. aestivum were exposed to 100 ppb O(3) or charcoal-filtered air in open top chambers for 21 d. Responses to O(3) were assessed by visible O(3) injury, gas exchange, chlorophyll fluorescence, relative growth rate, and biomass accumulation. Ozone significantly decreased light-saturated net photosynthetic rate (-37%) and instantaneous transpiration efficiency (-42%), but increased stomatal conductance (+11%) and intercellular CO(2) concentration (+11%). Elevated O(3) depressed ground fluorescence (-8%), maximum fluorescence (-26%), variable fluorescence (-31%), and maximum photochemical efficiency (-7%). Ozone also decreased relative growth rate and the allometric coefficient, which finally reduced total biomass accumulation (-54%), but to a greater extent in roots (-77%) than in the shoot (-44%). Winter wheat exhibited significant interspecies variation in the impacts of elevated O(3) on photosynthesis and growth. Primitive cultivated wheat demonstrated the highest relative O(3) tolerance followed by modern wheat and wild wheat showed the lowest. Among the genome donors of modern wheat, Aegilops tauschii (DD) behaved as the most O(3)-sensitive followed by T. monococcum (AA) and Triticum turgidum ssp. durum (AABB) appeared to be the most O(3)-tolerant. It was concluded that the higher O(3) sensitivity of modern wheat was attributed to the increased O(3) sensitivity of Aegilops tauschii (DD), but not to Triticum turgidum ssp. durum (AABB) during speciation.
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Affiliation(s)
- D K Biswas
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, The Chinese Academy of Sciences, 20 Nanxincun, 100093 Beijing, PR China
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Shi P, Ma R, Gao HD, Jiang LY, Sun JZ. Lipid-rich carcinoma of the breast: a case report. Acta Chir Belg 2008; 108:115-118. [PMID: 18411586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Lipid-rich carcinoma is a rare variant and accounts for < or = 2% of all breast cancer diagnoses. We report a case occurring in a 53-year-old female. The patient presented with a painless, right breast mass. Clinical examination and mammography suggested malignancy. Subsequent modified radical mastectomy revealed the diagnosis of lipid-rich carcinoma. The morphological features, differential diagnosis and treatment along with a brief review of the literature are discussed in this article. Lipid-rich carcinoma (L-RC) is a very rare variant of breast carcinomas with an aggressive clinical course and poor prognosis. It presents only 1% to 2% of all breast cases. It is classified as a specific variety of mammary carcinoma because the tumour cells possess abundant vacuolated cytoplasm which is strongly positive when stained for neutral fat. Aboumrad first described it in 1963 as lipid-secreting carcinoma. However, Ramos and Taylor renamed it as lipid-rich breast carcinoma. In China, the first case was reported in 1984. Herein, we report a case of lipid-rich carcinoma occurring in a 53-year-old female patient, and the literature is reviewed.
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Affiliation(s)
- P Shi
- Department of General Surgery, Shandong Provincial Hospital, Shandong Unniversity, Jinan 250021, China
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Lu H, Sun J, Xu Y, Xie D, Sun L, Shu X. Association between the leptin receptor gene polymorphism and lipoprotein profile in Chinese type 2 diabetes. Diabetes & Metabolic Syndrome: Clinical Research & Reviews 2007. [DOI: 10.1016/j.dsx.2007.09.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Zhang Y, Xing H, Yang P, Wu P, Jia M, Sun J, Wu T. Alkylation of benzene with propylene over MCM-36: A comparative study with MCM-22 zeolite synthesized from the same precursors. ACTA ACUST UNITED AC 2007. [DOI: 10.1007/s11144-007-4972-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Hu D, Shao C, Guan W, Su Z, Sun J. Studies on the interactions of Ti-containing polyoxometalates (POMs) with SARS-CoV 3CLpro by molecular modeling. J Inorg Biochem 2007; 101:89-94. [PMID: 17049610 PMCID: PMC7112571 DOI: 10.1016/j.jinorgbio.2006.08.013] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2005] [Revised: 08/14/2006] [Accepted: 08/17/2006] [Indexed: 11/28/2022]
Abstract
Ti-containing alpha-Keggin polyoxometalates (POMs) have been proved with properties of both anti-tumor and anti-HIV (human immunodeficiency virus). The potential anti-SARS (severe acute respiratory syndrome) activity of the POMs [alpha-PTi(2)W(10)O(40)](7-) isomers was investigated in this paper by molecular modeling method. The SARS 3c like protease, namely the SARS 3CL(pro) is the key function protease for virus replication as well as transcription and thus can be taken as one of the key targets for anti-SARS drug design. Affinity/Insight II was used to explore possible binding locations for POMs/3CL(pro) interaction. Charges in the POMs were obtained from density-functional theory (DFT) method. The results show that POMs bind with 3CL(pro) in the active site region with high affinity; POMs are more prone to bind with 3CL(pro) than with some organic compounds; for the POMs/3CL(pro)complex, the OTi(2) in POMs is the vital element for electrostatic interaction, and the electrostatic binding energy is strong enough to keep the complex stable.
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Affiliation(s)
- Donghua Hu
- Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun 130024, China
- Traditional Chinese Medicine Institute of Traditional Chinese Medicine Collage of Changchun, Changchun 130017, China
| | - Chen Shao
- Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Wei Guan
- Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Zhongmin Su
- Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Jiazhong Sun
- State Key Laboratory of Theoretical and Computational Chemistry of Jilin University, Changchun 130000, China
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Abstract
Schwannomas of the pancreas are rare tumors. We report a case of solitary schwannoma of the pancreas without von Recklinghausen disease. A 72-year-old man underwent routine abdominal ultrasound before cholecystectomy because of chronic cholecystitis and multiple gallstones, and ultrasound showed a small solitary tumor in the pancreas. Spiral computed tomography showed a 1.0-cm, well-defined homogeneous hypodense lesion with mild inhomogeneous enhancement and peripheral enhancement at the junction between the head and body of the pancreas. These computed tomographic findings are different from those in previous reports.
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Affiliation(s)
- R S Yu
- Department of Radiology, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310009, People's Republic of China.
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Sun J, Xu Y, Xue J, Zhu Y, Lu H. Methylenetetrahydrofolate reductase polymorphism associated with susceptibility to coronary heart disease in Chinese type 2 diabetic patients. Mol Cell Endocrinol 2005; 229:95-101. [PMID: 15607533 DOI: 10.1016/j.mce.2004.09.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2004] [Accepted: 09/09/2004] [Indexed: 10/26/2022]
Abstract
OBJECTIVE Epidemiological studies have identified hyperhomocyst(e)inemia as an independent risk factor for atherosclerosis. The C677T variant of the methylenetetrahydrofolate reductase (MTHFR) gene, one of the key enzymes catalyzing remethylation of homocysteine, might play a role in the development of coronary heart disease (CHD). In this study, we examined the distribution of the MTHFR genotypes in the Chinese population and the association between the C677T variant and CHD in Chinese type 2 diabetic patients. METHODS Two hundred and twenty-eight unrelated patients with type 2 diabetes mellitus (126 with coronary heart disease) and 114 healthy control subjects were recruited. The MTHFR genotype was analyzed by PCR followed by HinfI digestion. Plasma total homocysteine levels were measured using high-performance liquid chromatography (HPLC) with fluorescence detection. RESULTS In 114 healthy control subjects, the frequency of the mutant T allele was 38.0%, comparable to that of a Hong Kong (Chinese) population. The genotype distribution did not differ between control subjects and type 2 diabetic patients (chi(2) = 3.67, P > 0.05). Genotypic analysis revealed that type 2 diabetic patients with CHD displayed a greater prevalence of T allele (45.2%) than type 2 diabetic patients without CHD (30.4%) (chi(2) = 8.72, P < 0.005). The odds ratio for CHD in type 2 diabetic patients in presence of T allele was 1.89 (CI 95%, 1.24-2.88). The MTHFR genotype were different between diabetic patients with and without CHD (chi(2) = 11.98, P < 0.005). Moreover, plasma homocysteine levels were markedly higher in individuals with TT genotype than those with CC or CT genotype or CC plus CT genotype. CONCLUSIONS The C677T mutation of MTHFR gene is common in the Chinese population. MTHFR C677T gene polymorphism associated with a predisposition to increased plasma homocysteine levels could constitute a useful predictive marker for CHD in Chinese type 2 diabetic patients.
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Affiliation(s)
- Jiazhong Sun
- Department of Endocrinology, Zhongnan Hospital, Wuhan University, Wuhan 430071, China.
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Ozyilmaz B, Kent AD, Sun JZ, Rooks MJ, Koch RH. Current-induced excitations in single cobalt ferromagnetic layer nanopillars. Phys Rev Lett 2004; 93:176604. [PMID: 15525101 DOI: 10.1103/physrevlett.93.176604] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2004] [Indexed: 05/24/2023]
Abstract
Current-induced excitations in Cu/Co/Cu single ferromagnetic layer nanopillars ( approximately 50 nm in diameter) have been studied experimentally as a function of Co layer thickness at low temperatures for large applied fields perpendicular to the layers. For asymmetric junctions current-induced excitations are observed at high current densities for only one polarity of the current and are absent at the same current densities in symmetric junctions. These observations confirm recent predictions of spin-transfer torque induced spin-wave excitations in single layer junctions with a strong asymmetry in the spin accumulation in the leads.
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Affiliation(s)
- B Ozyilmaz
- Department of Physics, New York University, New York, New York 10003, USA
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