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Li Y, Yang T, Lin X, Huang J, Zeng J, Cai Q, Zhang Y, Rong J, Yu W, Qiu J, Pang Y, Zhou J. Isolation, identification, and optimization of conditions for the degradation of four sulfonamide antibiotics and their metabolic pathways in Pseudomonas stutzeri strain DLY-21. Heliyon 2024; 10:e29123. [PMID: 38601639 PMCID: PMC11004222 DOI: 10.1016/j.heliyon.2024.e29123] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2023] [Revised: 03/28/2024] [Accepted: 04/01/2024] [Indexed: 04/12/2024] Open
Abstract
Overuse of sulfonamides in aquaculture and agriculture leads to residual drugs that cause serious pollution of the environment. However, the residues of sulfonamides in the environment are not unique, and the existing microbial degradation technology has a relatively low degradation rate of sulfonamides. Therefore, in this study, a Pseudomonas stutzeri strain (DLY-21) with the ability to degrade four common SAs was screened and isolated from aerobic compost. Under optimal conditions, the DLY-21 strain degraded four sulfonamides simultaneously within 48 h, and the degradation rates were all over 90%, with the average degradation rates of SAs being sulfoxide (SDM) ≈ sulfachloropyridazine (SCP) > sulfa quinoxaline (SQ) > sulfadiazine (SQ). In addition, the main compounds of the strain DLY-21-degrading SAs were identified by LC-MS analysis. On this basis, four detailed reaction pathways for SA degradation were deduced. This is the first report of the use of a P. stutzeri strain to degrade four sulfonamide antibiotics (SQ, SDM, SCP, and SM1), which can improve the removal efficiency of sulfonamide antibiotic pollutants and thus ameliorate environmental pollution. The results showed that DLY-21 had a good degradation effect on four SAs (SQ, SDM, SCP, and SM1).
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Affiliation(s)
- Yaxin Li
- College of Agriculture, Yangtze University, Jingzhou, 434025, China
| | - Ting Yang
- College of Agriculture, Yangtze University, Jingzhou, 434025, China
| | - Xiaojun Lin
- South China Irstitute of Environmental Sciences, MEE, Guangzhou, 510642, China
| | - Jianfeng Huang
- Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China
| | - Jingwen Zeng
- South China Irstitute of Environmental Sciences, MEE, Guangzhou, 510642, China
| | - Qianyi Cai
- South China Irstitute of Environmental Sciences, MEE, Guangzhou, 510642, China
| | - Yuanling Zhang
- Guangzhou Shangran Environmental Technology Co., Ltd, 511442, China
| | - Jinnan Rong
- Guangzhou Shangran Environmental Technology Co., Ltd, 511442, China
| | - Weida Yu
- Guangzhou Shangran Environmental Technology Co., Ltd, 511442, China
| | - Jinrong Qiu
- South China Irstitute of Environmental Sciences, MEE, Guangzhou, 510642, China
| | - Yuwan Pang
- Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China
| | - Jianli Zhou
- College of Agriculture, Yangtze University, Jingzhou, 434025, China
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Bartolacci JG, Behun MN, Warunek JP, Li T, Sahu A, Dwyer GK, Lucas A, Rong J, Ambrosio F, Turnquist HR, Badylak SF. Matrix-bound nanovesicle-associated IL-33 supports functional recovery after skeletal muscle injury by initiating a pro-regenerative macrophage phenotypic transition. NPJ Regen Med 2024; 9:7. [PMID: 38280914 PMCID: PMC10821913 DOI: 10.1038/s41536-024-00346-2] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 01/04/2024] [Indexed: 01/29/2024] Open
Abstract
Injuries to skeletal muscle are among the most common injuries in civilian and military populations, accounting for nearly 60% of extremity injuries. The standard of care for severe extremity injury has been focused upon limb salvage procedures and the utilization of tissue grafts or orthotics in conjunction with rehabilitation to avoid amputation. Nonetheless, many patients have persistent strength and functional deficits that permanently impact their quality of life. Preclinical and clinical studies have shown that partial restoration of functional skeletal muscle tissue following injury can be achieved by the implantation of a biologic scaffold composed of extracellular matrix (ECM). These favorable outcomes are mediated, at least in part, through local immunomodulation. The mechanisms underlying this immunomodulatory effect, however, are poorly understood. The present study investigates a potential mechanistic driver of the immunomodulatory effects; specifically, the effect of selected ECM components upon inflammation resolution and repair. Results show that the host response to skeletal muscle injury is profoundly altered and functional recovery decreased in il33-/- mice compared to age- and sex-matched wildtype counterparts by 14 days post-injury. Results also show that IL-33, contained within matrix-bound nanovesicles (MBV), supports skeletal muscle regeneration by regulating local macrophage activation toward a pro-remodeling phenotype via canonical and non-canonical pathways to improve functional recovery from injury compared to untreated il33-/- counterparts. Taken together, these data suggest that MBV and their associated IL-33 cargo represent a novel homeostatic signaling mechanism that contributes to skeletal muscle repair.
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Affiliation(s)
- J G Bartolacci
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA
| | - M N Behun
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA
| | - J P Warunek
- Departments of Surgery and Immunology, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - T Li
- Departments of Surgery and Immunology, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - A Sahu
- Department of Physical Medicine and Rehabilitation Sciences, University of Pittsburgh, Pittsburgh, PA, USA
| | - G K Dwyer
- Departments of Surgery and Immunology, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - A Lucas
- Departments of Surgery and Immunology, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - J Rong
- McGowan Institute for Regenerative Medicine, Pittsburgh, USA
| | - F Ambrosio
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Physical Medicine and Rehabilitation Sciences, University of Pittsburgh, Pittsburgh, PA, USA
- McGowan Institute for Regenerative Medicine, Pittsburgh, USA
| | - H R Turnquist
- Departments of Surgery and Immunology, University of Pittsburgh Medical Center, Pittsburgh, PA, USA.
- McGowan Institute for Regenerative Medicine, Pittsburgh, USA.
| | - S F Badylak
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA.
- Departments of Surgery and Immunology, University of Pittsburgh Medical Center, Pittsburgh, PA, USA.
- McGowan Institute for Regenerative Medicine, Pittsburgh, USA.
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Alhilali M, Hearn JI, Rong J, Jain L, Bolam SM, Monk AP, Munro JT, Dalbeth N, Poulsen RC. IL-1β induces changes in expression of core circadian clock components PER2 and BMAL1 in primary human chondrocytes through the NMDA receptor/CREB and NF-κB signalling pathways. Cell Signal 2021; 87:110143. [PMID: 34481895 DOI: 10.1016/j.cellsig.2021.110143] [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: 07/07/2021] [Revised: 08/31/2021] [Accepted: 09/01/2021] [Indexed: 11/30/2022]
Abstract
The circadian clock is a specialised cell signalling circuit present in almost all cells. It controls the timing of key cell activities such as proliferation and differentiation. In osteoarthritis, expression of two components of the circadian clock, BMAL1 and PER2 is altered in chondrocytes and this change has been causally linked with the increase in proliferation and altered chondrocyte differentiation in disease. IL-1β, an inflammatory cytokine abundant in OA joints, has previously been shown to induce changes in BMAL1 and PER2 expression in chondrocytes. The purpose of this study is to identify the mechanism involved. We found IL-1β treatment of primary human chondrocytes led to activation of NMDA receptors as evidenced by an increase in phosphorylation of GluN1 and an increase in intracellular calcium which was blocked by the NMDAR antagonist MK801. Levels of phosphorylated CREB were also elevated in IL-1β treated cells and this effect was blocked by co-treatment of cells with IL-1β and the NMDAR antagonist MK-801. Knockdown of CREB or inhibition of CREB activity prevented the IL-1β induced increase in PER2 expression in chondrocytes but had no effect on BMAL1. Phosphorylated p65 levels were elevated in IL-1β treated chondrocytes indicating increased NF-κB activation. Inhibition of NF-κB activity prevented the IL-1β induced reduction in BMAL1 expression and partially mitigated the IL-1β induced increase in PER2 expression in chondrocytes. These data indicate that the NMDAR/CREB and NF-κB signalling pathways regulate the core circadian clock components PER2 and BMAL1 in chondrocytes. Given that changes in expression of these clock components have been observed in a wide range of diseases, these findings may be broadly relevant for understanding the mechanism leading to circadian clock changes in pathology.
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Affiliation(s)
- M Alhilali
- Department of Pharmacology and Clinical Pharmacology, School of Medical Sciences, University of Auckland, Auckland, New Zealand
| | - J I Hearn
- Department of Molecular Medicine and Pathology, School of Medical Sciences, University of Auckland, Auckland, New Zealand
| | - J Rong
- Department of Pharmacology and Clinical Pharmacology, School of Medical Sciences, University of Auckland, Auckland, New Zealand
| | - L Jain
- Department of Pharmacology and Clinical Pharmacology, School of Medical Sciences, University of Auckland, Auckland, New Zealand
| | - S M Bolam
- Department of Surgery, School of Medicine, University of Auckland, Auckland, New Zealand; Auckland District Health Board, Auckland, New Zealand
| | - A P Monk
- Auckland District Health Board, Auckland, New Zealand; Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand
| | - J T Munro
- Department of Surgery, School of Medicine, University of Auckland, Auckland, New Zealand; Auckland District Health Board, Auckland, New Zealand
| | - N Dalbeth
- Auckland District Health Board, Auckland, New Zealand; Department of Medicine, School of Medicine, University of Auckland, Auckland, New Zealand
| | - R C Poulsen
- Department of Pharmacology and Clinical Pharmacology, School of Medical Sciences, University of Auckland, Auckland, New Zealand; Department of Medicine, School of Medicine, University of Auckland, Auckland, New Zealand.
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Branco D, Kry S, Paige T, Rong J, Zhang X, Frank S, Followill D. PO-1754: A stereoscopic CT artifact reduction method image quality comparison to current vendor solutions. Radiother Oncol 2020. [DOI: 10.1016/s0167-8140(21)01772-2] [Citation(s) in RCA: 1] [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: 11/25/2022]
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Jones A, Kisiel M, Rong J, Tam A. 03:54 PM Abstract No. 369 Comparison of measured peak skin dose to scanner-reported dose indices during CT-guided interventions. J Vasc Interv Radiol 2019. [DOI: 10.1016/j.jvir.2018.12.442] [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: 10/27/2022] Open
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Kalev-Zylinska ML, Hearn JI, Rong J, Zhu M, Munro J, Cornish J, Dalbeth N, Poulsen RC. Altered N-methyl D-aspartate receptor subunit expression causes changes to the circadian clock and cell phenotype in osteoarthritic chondrocytes. Osteoarthritis Cartilage 2018; 26:1518-1530. [PMID: 30031924 DOI: 10.1016/j.joca.2018.06.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [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: 02/26/2018] [Revised: 06/08/2018] [Accepted: 06/30/2018] [Indexed: 02/02/2023]
Abstract
UNLABELLED The chondrocyte circadian clock is altered in osteoarthritis. This change is implicated in the disease-associated changes in chondrocyte phenotype and cartilage loss. Why the clock is changed is unknown. N-methyl-D-aspartate receptors (NMDAR) are critical for regulating the hypothalamic clock. Chondrocytes also express NMDAR and the type of NMDAR subunits expressed changes in osteoarthritis. OBJECTIVE To determine if NMDAR regulate the chondrocyte clock and phenotype. DESIGN Chondrocytes isolated from macroscopically-normal (MN) and osteoarthritic human cartilage were treated with NMDAR antagonists or transfected with GRIN2A or GRIN2B-targetting siRNA. H5 chondrocytes were transfected with GluN2B-expression plasmids. Clock genes and chondrocyte phenotypic markers were measured by RT-qPCR. RESULTS PER2 amplitude was higher and BMAL1 amplitude lower in osteoarthritic compared to MN chondrocytes. In osteoarthritic chondrocytes, NMDAR inhibition restored PER2 and BMAL1 expression to levels similar to MN chondrocytes, and resulted in reduced MMP13 and COL10A1. Paradoxically, NMDAR inhibition in MN chondrocytes resulted in increased PER2, decreased BMAL1 and increased MMP13 and COL10A1. Osteoarthritic, but not MN chondrocytes expressed GluN2B NMDAR subunits. GluN2B knockdown in osteoarthritic chondrocytes restored expression of circadian clock components and phenotypic markers to levels similar to MN chondrocytes. Ectopic expression of GluN2B resulted in reduced BMAL1, increased PER2 and altered SOX9, RUNX2 and MMP13 expression. Knockdown of PER2 mitigated the effects of GluN2B on SOX9 and MMP13. CONCLUSIONS NMDAR regulate the chondrocyte clock and phenotype suggesting NMDAR may also regulate clocks in other peripheral tissues. GluN2B expression in osteoarthritis may contribute to pathology by altering the chondrocyte clock.
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Affiliation(s)
- M L Kalev-Zylinska
- Department of Molecular Medicine and Pathology, School of Medical Sciences, Auckland, New Zealand.
| | - J I Hearn
- Department of Molecular Medicine and Pathology, School of Medical Sciences, Auckland, New Zealand.
| | - J Rong
- Department of Medicine, School of Medicine, Auckland, New Zealand.
| | - M Zhu
- Department of Medicine, School of Medicine, Auckland, New Zealand; Department of Surgery, School of Medicine, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand.
| | - J Munro
- Department of Surgery, School of Medicine, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand.
| | - J Cornish
- Department of Medicine, School of Medicine, Auckland, New Zealand.
| | - N Dalbeth
- Department of Medicine, School of Medicine, Auckland, New Zealand.
| | - R C Poulsen
- Department of Medicine, School of Medicine, Auckland, New Zealand.
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Jiang L, Zhu X, Rong J, Xing B, Wang S, Liu A, Chu M, Huang G. Obesity, osteoarthritis and genetic risk: The rs182052 polymorphism in the ADIPOQ gene is potentially associated with risk of knee osteoarthritis. Bone Joint Res 2018; 7:494-500. [PMID: 30123499 PMCID: PMC6076358 DOI: 10.1302/2046-3758.77.bjr-2017-0274.r1] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Objectives Given the function of adiponectin (ADIPOQ) on the inflammatory condition of obesity and osteoarthritis (OA), we hypothesized that the ADIPOQ gene might be a candidate gene for a marker of susceptibility to OA. Methods We systematically screened three tagging polymorphisms (rs182052, rs2082940 and rs6773957) in the ADIPOQ gene, and evaluated the association between the genetic variants and OA risk in a case-controlled study that included 196 OA patients and 442 controls in a northern Chinese population. Genotyping was performed using the Sequenom MassARRAY iPLEX platform. Results The single nucleotide polymorphism (SNP) rs182052 was found to be potentially associated with knee OA risk (additive model: odds ratio = 1.38; 95% confidence interval 1.07 to 1.76; p = 0.012). Furthermore, a non-significant association was observed for rs182052 and body mass index with regard to OA risk in interaction analyses (p = 0.063). Similarly, no significant interaction was detected for rs182052 and age with regard to OA risk (p = 0.614). Conclusion These findings suggest that the SNP rs182052 in the ADIPOQ gene may potentially modify individual susceptibility to knee OA in the Chinese population. Further studies are warranted to investigate our findings in more depth. Cite this article: L. Jiang, X. Zhu, J. Rong, B. Xing, S. Wang, A. Liu, M. Chu, G. Huang. Obesity, osteoarthritis and genetic risk: The rs182052 polymorphism in the ADIPOQ gene is potentially associated with risk of knee osteoarthritis. Bone Joint Res 2018;7:494–500. DOI: 10.1302/2046-3758.77.BJR-2017-0274.R1.
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Affiliation(s)
- L Jiang
- Shanghai Key Laboratory for Molecular Imaging, Shanghai University of Medicine and Health Sciences, Shanghai, China
| | - X Zhu
- Baoshan Center for Disease Control and Prevention,Shanghai, China
| | - J Rong
- Second Department of Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
| | - B Xing
- Hongqi Community Health Service Center, Xiangfang District, Harbin, Heilongjiang Province, China
| | - S Wang
- Second Department of Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
| | - A Liu
- Department of Nutrition, China National Center for Food Safety Risk Assessment, Beijing, China
| | - M Chu
- Department of Epidemiology, Public Health College, Nantong University, Nantong, Jiangsu Province, China
| | - G Huang
- Shanghai Key Laboratory for Molecular Imaging, Shanghai University of Medicine and Health Sciences, Shanghai, China
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Rong J, Shan C, Liu S, Zheng H, Liu C, Liu M, Jin F, Wang L. Skin resistance to UVB-induced oxidative stress and hyperpigmentation by the topical use of Lactobacillus helveticus NS8-fermented milk supernatant. J Appl Microbiol 2017; 123:511-523. [PMID: 28598022 DOI: 10.1111/jam.13506] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 03/31/2017] [Accepted: 05/11/2017] [Indexed: 01/29/2023]
Abstract
AIMS In this study, we investigated the preventive properties of the supernatant of Lactobacillus helveticus NS8-fermented milk (NS8-FS) against UV light-induced skin oxidative damage and hyperpigmentation. METHODS AND RESULTS NS8-FS exhibited significant radical scavenging activity in tests with ABST+ and DPPH scavenging methods, and as well strongly inhibited 3-morpholinosydnonimine (Sin-1)-induced ROS generation in HaCat keratinocytes. Unexpectedly, NS8-FS was found to inhibit melanin production in B16F10 melanoma cells and to exhibit inhibitory effects both to the enzymatic activity of tyrosinase (TYR) and the expression of proteins required for melanin synthesis. In SKH-1 hairless mice, topical application of NS8-FS alleviated UVB-induced skin photodamage, including the improvement of the appearance of epidermal thickness, transepidennal water loss and lipid peroxidation levels. In the tanning guinea pig model, the whitening effect of NS8-FS was demonstrated using Masson-Fontana staining and TYR staining. Furthermore, NS8-FS was shown to stimulate the nuclear translocation and activation of the Nrf2 protein, along with recovery of antioxidant enzyme activities. CONCLUSION NS8-FS exhibits the protective capacities against UV light-induced skin oxidative damage and hyperpigmentation. SIGNIFICANCE AND IMPACT OF THE STUDY Our findings indicate the potential of cell-free fermented products of lactic acid bacteria in topical photoprotection.
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Affiliation(s)
- J Rong
- Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.,Institute of Ageing Research, School of Medicine, Hangzhou Normal University, Hangzhou, China
| | - C Shan
- Institute of Ageing Research, School of Medicine, Hangzhou Normal University, Hangzhou, China
| | - S Liu
- Institute of Ageing Research, School of Medicine, Hangzhou Normal University, Hangzhou, China
| | - H Zheng
- Institute of Ageing Research, School of Medicine, Hangzhou Normal University, Hangzhou, China
| | - C Liu
- Institute of Ageing Research, School of Medicine, Hangzhou Normal University, Hangzhou, China
| | - M Liu
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China.,University of the Chinese Academy of Sciences, Beijing, China
| | - F Jin
- Key Lab of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing, China
| | - L Wang
- Institute of Ageing Research, School of Medicine, Hangzhou Normal University, Hangzhou, China
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Chu M, Zhu X, Wang C, Rong J, Wang Y, Wang S, Xing B, Tao Y, Zhuang X, Jiang L. The rs4238326 polymorphism in ALDH1A2 gene potentially associated with non-post traumatic knee osteoarthritis susceptibility: a two-stage population-based study. Osteoarthritis Cartilage 2017; 25:1062-1067. [PMID: 28089900 DOI: 10.1016/j.joca.2017.01.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [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: 06/28/2016] [Revised: 12/27/2016] [Accepted: 01/06/2017] [Indexed: 02/02/2023]
Abstract
OBJECTIVE A recent genome-wide association study reported significant associations of genetic variants within the ALDH1A2 gene with osteoarthritis (OA) of the hand in European populations. However, these findings have not been well generalized to other joints, or to other populations. METHODS We performed a two-stage population-based case-control study including 196 non-post traumatic knee OA cases and 442 controls in the first stage and independent 143 non-post traumatic knee OA cases and 238 controls in the second stage in a Chinese population by genotyping eight tagging polymorphisms in ALDH1A2. RESULTS In the first stage, the single nucleotide polymorphism (SNP) rs4238326 was found to be potentially associated with knee OA risk (additive model: odds ratio [OR] = 0.70; 95% confidence interval [95% CI] = 0.49-1.01; P = 0.055), which was further confirmed in the second stage with similar effect (additive model: OR = 0.60; 95% CI = 0.38-0.95; P = 0.029). After combining the two stages, we found that the variant C allele of rs4238326 was probably associated with decreased risk of knee OA (additive model: OR = 0.65; 95% CI = 0.49-0.86; P = 0.003). Furthermore, interaction analyses showed that rs4238326 interacted multiplicatively with age to contribute to knee OA risk (interaction P = 0.041). CONCLUSIONS These findings indicate that the SNP rs4238326 in ALDH1A2 gene may potentially modify individual susceptibility to knee OA in the Chinese population. Beyond that, further studies are warranted to validate and extend our findings, and future functional studies are required to clarify the possible mechanisms.
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Affiliation(s)
- M Chu
- Department of Epidemiology, School of Public Health, Nantong University, Nantong, Jiangsu Province, PR China
| | - X Zhu
- Department of Epidemiology, School of Public Health, Nantong University, Nantong, Jiangsu Province, PR China
| | - C Wang
- College of Chemistry and Chemical Engineering, Nantong University, Nantong, Jiangsu Province, PR China
| | - J Rong
- Second Department of Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, PR China
| | - Y Wang
- Department of Epidemiology, School of Public Health, Nantong University, Nantong, Jiangsu Province, PR China
| | - S Wang
- Second Department of Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, PR China
| | - B Xing
- Hongqi Community Health Service Center, Xiangfang District, Harbin, Heilongjiang Province, PR China
| | - Y Tao
- Department of Health Education, Public Health College, Harbin Medical University, Harbin, Heilongjiang Province, PR China
| | - X Zhuang
- Department of Epidemiology, School of Public Health, Nantong University, Nantong, Jiangsu Province, PR China
| | - L Jiang
- Department of Epidemiology, School of Public Health, Nantong University, Nantong, Jiangsu Province, PR China.
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Fan S, Rong J, Zhang H, Zhao Z. The Fragment Distribution of Nb, Au, and Pb from Proton-Induced Reactions with Energies Ranging from 100 MeV to 3 GeV. NUCL SCI ENG 2017. [DOI: 10.13182/nse03-a2355] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- S. Fan
- China Institute of Atomic Energy, Beijing 102413, China
| | - J. Rong
- China Institute of Atomic Energy, Beijing 102413, China
| | - H. Zhang
- China Institute of Atomic Energy, Beijing 102413, China and Northwest University, Physics Department, Xi’an 710069, China
| | - Z. Zhao
- China Institute of Atomic Energy, Beijing 102413, China
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Rong J, Chunhua M, Yuan L, Ning M, Jinduo L, Bin W, Liwei S. Clinical interrogation and application of super-selective intracranial artery infusion chemotherapy for lung cancer patients with brain metastases. Indian J Cancer 2016; 52 Suppl 1:e22-5. [PMID: 26548934 DOI: 10.4103/0019-509x.168951] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVE The purpose of this study was to evaluate the clinical efficacy of super-selective intracranial artery infusion chemotherapy and to determine correlated prognostic parameters for advanced lung cancer patients with brain metastases. PATIENTS AND METHODS Fifty-four lung cancer patients with brain metastasis who had no previous treatment were enrolled for the study. These patients received super-selective intracranial artery infusion chemotherapy, as well as arterial infusion chemotherapy for primary and metastatic lesions. The procedure was performed once every 4 weeks. Patients were monitored to evaluate short-term clinical outcomes 4 weeks after the first 2 treatments, and follow-up visits performed every 4 weeks after the first 4 treatments until the appearance of disease progression or intolerable toxicity. RESULTS All 54 cases were treated at least 4 times. The overall response rate was 55.56% (30/54), and the disease control rate was 85.19% (46/54). The median overall survival was 7 months, with a 95% confidence interval (CI) of 5.87-8.13 months, and the median progression-free survival was 4 months, with a 95% CI of 3.20-4.80 months. The 6-month survival rate and 1-year survival rate were 81.48% (44/54) and 18.52% (10/54), respectively. CONCLUSION Super-selective intracranial artery infusion chemotherapy provides a clinically efficacious avenue of treatment for lung cancer patients with brain metastases. Pathological classification, Karnofsky performance status, and extracranial metastases may serve as reliable prognostic parameters in determining the clinical outcomes for lung cancer patients with brain metastases.
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Affiliation(s)
- J Rong
- Department of Intervention, Tianjin Huanhu Hospital, Tianjin Key Laboratory of Cerebral Vascular and Neurodegenerative Diseases, Tianjin 300060, China
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Bache S, Liu X, Rong J. SU-G-206-08: How Should Focal Spot Be Chosen for Optimized CT Imaging with Dose Modulation? Med Phys 2016. [DOI: 10.1118/1.4956949] [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: 11/07/2022] Open
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Rong J. SU-F-P-38: Professional Practice Evaluation and Quality Improvement. Med Phys 2016. [DOI: 10.1118/1.4955745] [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: 11/07/2022] Open
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Bache S, Rong J. SU-G-206-02: Impact of Focal Spot Sizes On CT Image Quality. Med Phys 2016. [DOI: 10.1118/1.4956943] [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: 11/07/2022] Open
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Bache S, Liu X, Loyer E, Rong J. TH-CD-207B-12: Quantification of Clinical Feedback On Image Quality Differences Between Two CT Scanner Models. Med Phys 2016. [DOI: 10.1118/1.4958218] [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: 11/07/2022] Open
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Wang Y, Chu M, Rong J, Xing B, Zhu L, Zhao Y, Zhuang X, Jiang L. No association of the single nucleotide polymorphism rs8044769 in the fat mass and obesity-associated gene with knee osteoarthritis risk and body mass index: A population-based study in China. Bone Joint Res 2016; 5:169-74. [PMID: 27166265 PMCID: PMC4921048 DOI: 10.1302/2046-3758.55.2000589] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Accepted: 03/01/2016] [Indexed: 01/26/2023] Open
Abstract
OBJECTIVES Previous genome-wide association studies (GWAS) have reported significant association of the single nucleotide polymorphism (SNP) rs8044769 in the fat mass and obesity-associated gene (FTO) with osteoarthritis (OA) risk in European populations. However, these findings have not been confirmed in Chinese populations. METHODS We systematically genotyped rs8044769 and evaluated the association between the genetic variants and OA risk in a case-controlled study including 196 OA cases and 442 controls in a northern Chinese population. Genotyping was performed using the Sequenom MassARRAY iPLEX platform. RESULTS We found that the variant T allele of rs8044769 showed no significant association of OA risk (p = 0.791), or association with body mass index (BMI) (pmeta = 0.786) in an additive genetic model. However, we detected a significant interaction between rs8044769 genotypes and BMI on OA risk (p = 0.037), as well as a borderline interaction between rs8044769 genotypes and age on OA risk (p = 0.062). CONCLUSIONS Our findings indicate that rs8044769 in the FTO gene may not modify individual susceptibility to OA or increased BMI in the Chinese population. Further studies are warranted to validate and extend our findings.Cite this article: Prof L. Jiang. No association of the single nucleotide polymorphism rs8044769 in the fat mass and obesity-associated gene with knee osteoarthritis risk and body mass index: A population-based study in China. Bone Joint Res 2016;5:169-174. DOI: 10.1302/2046-3758.55.2000589.
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Affiliation(s)
- Y Wang
- Department of Epidemiology, Nantong University, School of Public Health, Nantong, Jiangsu Province, China
| | - M Chu
- Department of Epidemiology, Nantong University, School of Public Health, Nantong, Jiangsu Province, China
| | - J Rong
- Department of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
| | - B Xing
- Hongqi Community Health Service Center, Xiangfang District, Harbin, Heilongjiang Province, China
| | - L Zhu
- Department of Epidemiology, Public Health College, Harbin Medical University, Harbin, Heilongjiang Province, China
| | - Y Zhao
- Department of Epidemiology, Public Health College, Harbin Medical University, Harbin, Heilongjiang Province, China
| | - X Zhuang
- Department of Epidemiology, Nantong University, School of Public Health, Nantong, Jiangsu Province, China
| | - L Jiang
- Department of Epidemiology, Nantong University, School of Public Health, Nantong, Jiangsu Province, China
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Li G, Liu X, Dodge C, Jensen C, Rong J. MO-FG-204-04: How Iterative Reconstruction Algorithms Affect the NPS of CT Images. Med Phys 2015. [DOI: 10.1118/1.4925425] [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: 11/07/2022] Open
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18
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Bache S, Loyer E, Stauduhar P, Liu X, Rong J. SU-E-I-22: A Comprehensive Investigation of Noise Variations Between the GE Discovery CT750 HD and GE LightSpeed VCT. Med Phys 2015. [DOI: 10.1118/1.4924019] [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: 11/07/2022] Open
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Abstract
CD45 is a transmembrane protein tyrosine phosphatase that is specifically expressed in hematopoietic cells and can initiate signal transduction via the dephosphorylation of tyrosine. Alternatively spliced transcript variants of this gene encode distinct isoforms, which indicate different functional states of CD45. Among these variants, CD45RO, which contains neither exon 4, 5, or 6, is over-expressed in lymphocytes in autoimmune diseases, including systemic lupus erythematosus, rheumatoid arthritis, multiple sclerosis, and type I diabetes. The CD45 RO serves as a marker of the immune response activity and lymphocyte development. Previous studies have indicated that exon splicing is generally correlated with local hypermethylated DNA and acetylated histone modification, while autoimmune diseases are commonly associated with global hypomethylation and histone deacetylation in lymphocytes. Thus, the question arises of how exons 4, 5, and 6 of CD45RO are excluded under the status of global DNA hypomethylation and histone deacetylation in these autoimmune diseases. On the basis of the analyses of the context sequence of CD45 and its natural antisense RNA in GenBank, we proposed that the long noncoding RNA encoded by the natural antisense gene of CD45 contributes to the expressional regulation of the CD45RO splicing variant via recruitment of DNA methyltransferase and histone modification modulators specific to the sense gene CD45; thus, it is associated with the over-expression of CD45RO and the functional regulation of lymphocytes in the pathogenic development of autoimmune diseases.
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Affiliation(s)
- J Rong
- Department of Rheumatology, the Second Affiliated Hospital of Shantou University Medical College, Guangdong, China
| | - J Yin
- Department of Rheumatology, the Second Affiliated Hospital of Shantou University Medical College, Guangdong, China
| | - Z Su
- Department of Histology and Embryology, Shantou University Medical College, Shantou Guangdong, China
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Liang M, Sun J, Rong J, Xuan F, Zhao L, Wang X, Li F, Yao T, Han Y. ASSA14-12-10 Mobile minimally invasive interventional shelter: A new answer to pre-hospital care of large arterial trauma. Heart 2015. [DOI: 10.1136/heartjnl-2014-307109.99] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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21
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Tian J, Xiang L, Liang M, Sun J, Rong J, Xuan F, Zhao L, Han Y. ASSA14-12-06 Effects of Internal Iliac Artery Embolization to Systemic Inflammatory Response Syndrome in Simulated-Pelvic-Fracture Dog Combined with Massive Bleeding. Heart 2015. [DOI: 10.1136/heartjnl-2014-307109.95] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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22
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Xuan F, Zhao L, Rong J, Liang M, Sun J, Han Y. ASSA14-12-07 In vitroand in vivobiocompatibility evoluation of New vascular embolization agent:. Heart 2015. [DOI: 10.1136/heartjnl-2014-307109.96] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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23
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Yao T, Rong J, Liang M, Sun J, Xuan F, Zhao L, Wang X, Li F, Wang G, Han Y. ASSA14-12-09 Emergency treatment of splenic injury in a novel mobile minimally invasive interventional shelter following disaster: a feasibility study. Heart 2015. [DOI: 10.1136/heartjnl-2014-307109.98] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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24
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Yue Z, Rong J, Ping W, Bing Y, Xin Y, Feng LD, Yaping W. Gene expression of the p16(INK4a)-Rb and p19(Arf)-p53-p21(Cip/Waf1) signaling pathways in the regulation of hematopoietic stem cell aging by ginsenoside Rg1. Genet Mol Res 2014; 13:10086-96. [PMID: 25501220 DOI: 10.4238/2014.december.4.3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The elucidation of the molecular mechanisms underlying the effects of traditional Chinese medicines in clinical practice is a key step toward their worldwide application, and this topic is currently a subject of intense research interest. Rg1, a component of ginsenoside, has recently been shown to perform several pharmacological functions; however, the underlying mechanisms of these effects remain unclear. In the present study, we investigated whether Rg1 has an anti-senescence effect on hematopoietic stem cells (HSCs) and the possible molecular mechanisms driving any effects. The results showed that Rg1 could effectively delay tert-butyl hydroperoxide (t-BHP)-induced senescence and inhibit gene expression in the p16(INK4a)-Rb and p19(Arf)-p53-p21(Cip/Waf1) signaling pathways in HSCs. Our study suggested that these two signaling pathways might be potential targets for elucidating the molecular mechanisms of the Rg1 anti-senescence effect.
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Affiliation(s)
- Z Yue
- Laboratory of Stem Cell and Tissue Engineering, Department of Histology and Embryology, Chongqing Medical University, Chongqing, China
| | - J Rong
- Laboratory of Stem Cell and Tissue Engineering, Department of Histology and Embryology, Chongqing Medical University, Chongqing, China
| | - W Ping
- Department of Stomatology, The First Affiliated Hospital, Chongqing University of Medical Sciences, Chongqing, China
| | - Y Bing
- Laboratory of Stem Cell and Tissue Engineering, Department of Histology and Embryology, Chongqing Medical University, Chongqing, China
| | - Y Xin
- Laboratory of Stem Cell and Tissue Engineering, Department of Histology and Embryology, Chongqing Medical University, Chongqing, China
| | - L D Feng
- Laboratory of Stem Cell and Tissue Engineering, Department of Histology and Embryology, Chongqing Medical University, Chongqing, China
| | - W Yaping
- Laboratory of Stem Cell and Tissue Engineering, Department of Histology and Embryology, Chongqing Medical University, Chongqing, China
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Yang M, Xu M, Pan X, Hu Z, Li Q, Wei Y, Zhang Y, Rong J, Zhai J, He P, Hu S, Song H, Wu H, Zhan F, Liu S, Gao G, Liu Z, Li Y, Shen L, Huang A, Lin Z, Liao Z, Cao S, Wei Q, Li Q, Lv Q, Qi J, Li T, Jin O, Pan Y, Gu J. Epidemiological comparison of clinical manifestations according to HLA-B*27 carrier status of Chinese ankylosing spondylitis patients. ACTA ACUST UNITED AC 2014; 82:338-43. [PMID: 24131020 DOI: 10.1111/tan.12186] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2012] [Revised: 07/14/2013] [Accepted: 07/22/2013] [Indexed: 02/04/2023]
Abstract
The aim of the study was to investigate and compare the clinical manifestations between HLA-B27(+) and HLA-B27(-) ankylosing spondylitis (AS) patients in order to obtain knowledge of the impact of HLA-B27 status on AS, and to inform clinical treatment. A nationwide epidemiological investigation was performed from November 2008 to October 2010. The demographic data and clinical characteristics, and the status of HLA-B27 were collected using questionnaires and laboratory assay, respectively. A total of 2144 patients (78.5% males and 78.4% HLA-B27(+) AS patients) participated in this study. The percentages of males, patients with family history, and involvement of lumbar spine, thoracic spine and hip joints, were observed to be significantly higher in the HLA-B27(+) AS patients than in their HLA-B27(-) AS peers.
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Affiliation(s)
- M Yang
- Department of Rheumatology and Immunology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
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Dodge C, Rong J, Dodge C. WE-D-18A-04: How Iterative Reconstruction Algorithms Affect the MTFs of Variable-Contrast Targets in CT Images. Med Phys 2014. [DOI: 10.1118/1.4889413] [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: 11/07/2022] Open
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28
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Liu X, Cody D, Rong J. SU-E-I-101: Effects of Gantry Rotation Time On CT Number Accuracy in Single-Source Dual Energy CT Imaging with Fast-KVp Switching. Med Phys 2014. [DOI: 10.1118/1.4888051] [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: 11/07/2022] Open
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29
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Oost R, Rong J, Minnaard AJ, Harutyunyan SR. Synthesis of new derivatives of copper complexes of Josiphos family ligands for applications in asymmetric catalysis. Catal Sci Technol 2014. [DOI: 10.1039/c4cy00180j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
New derivatives of copper complexes of Josiphos family ligands have been prepared and studied in asymmetric catalytic addition of Grignard reagents to enones, enoates and aromatic ketones.
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Affiliation(s)
- R. Oost
- Stratingh Institute for Chemistry
- University of Groningen
- Groningen
- The Netherlands
| | - J. Rong
- Stratingh Institute for Chemistry
- University of Groningen
- Groningen
- The Netherlands
| | - A. J. Minnaard
- Stratingh Institute for Chemistry
- University of Groningen
- Groningen
- The Netherlands
| | - S. R. Harutyunyan
- Stratingh Institute for Chemistry
- University of Groningen
- Groningen
- The Netherlands
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Qi J, Li Q, Lin Z, Liao Z, Wei Q, Cao S, Rong J, Hu Z, Yang M, Zhang Y, Lv Q, Huang J, Pan Y, Wu Y, Jin O, Li T, Gu J. Higher risk of uveitis and dactylitis and older age of onset among ankylosing spondylitis patients withHLA-B*2705than patients withHLA-B*2704in the Chinese population. ACTA ACUST UNITED AC 2013; 82:380-6. [PMID: 24498994 DOI: 10.1111/tan.12254] [Citation(s) in RCA: 21] [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] [Received: 03/06/2013] [Revised: 10/08/2013] [Accepted: 10/21/2013] [Indexed: 11/28/2022]
Affiliation(s)
- J. Qi
- Department of Rheumatology; Third Affiliated Hospital of Sun Yat-sen University; Guangzhou China
| | - Q. Li
- Department of Rheumatology; Third Affiliated Hospital of Sun Yat-sen University; Guangzhou China
| | - Z. Lin
- Department of Rheumatology; Third Affiliated Hospital of Sun Yat-sen University; Guangzhou China
| | - Z. Liao
- Department of Rheumatology; Third Affiliated Hospital of Sun Yat-sen University; Guangzhou China
| | - Q. Wei
- Department of Rheumatology; Third Affiliated Hospital of Sun Yat-sen University; Guangzhou China
| | - S. Cao
- Department of Rheumatology; Third Affiliated Hospital of Sun Yat-sen University; Guangzhou China
| | - J. Rong
- Department of Rheumatology; Third Affiliated Hospital of Sun Yat-sen University; Guangzhou China
| | - Z. Hu
- Department of Rheumatology; Third Affiliated Hospital of Sun Yat-sen University; Guangzhou China
| | - M. Yang
- Department of Rheumatology; Third Affiliated Hospital of Sun Yat-sen University; Guangzhou China
| | - Y. Zhang
- Department of Rheumatology; Third Affiliated Hospital of Sun Yat-sen University; Guangzhou China
| | - Q. Lv
- Department of Rheumatology; Third Affiliated Hospital of Sun Yat-sen University; Guangzhou China
| | - J. Huang
- Department of Rheumatology; Third Affiliated Hospital of Sun Yat-sen University; Guangzhou China
| | - Y. Pan
- Department of Rheumatology; Third Affiliated Hospital of Sun Yat-sen University; Guangzhou China
| | - Y. Wu
- Department of Rheumatology; Third Affiliated Hospital of Sun Yat-sen University; Guangzhou China
| | - O. Jin
- Department of Rheumatology; Third Affiliated Hospital of Sun Yat-sen University; Guangzhou China
| | - T. Li
- Department of Rheumatology; Third Affiliated Hospital of Sun Yat-sen University; Guangzhou China
| | - J. Gu
- Department of Rheumatology; Third Affiliated Hospital of Sun Yat-sen University; Guangzhou China
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Abstract
Silicon is of great interest for use as the anode material in lithium-ion batteries due to its high capacity. However, certain properties of silicon, such as a large volume expansion during the lithiation process and the low diffusion rate of lithium in silicon, result in fast capacity degradation in limited charge/discharge cycles, especially at high current rate. Therefore, the use of silicon in real battery applications is limited. The idea of using porous silicon, to a large extent, addresses the above-mentioned issues simultaneously. In this review, we discuss the merits of using porous silicon for anodes through both theoretical and experimental study. Recent progress in the preparation of porous silicon through the template-assisted approach and the non-template approach have been highlighted. The battery performance in terms of capacity and cyclability of each structure is evaluated.
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Affiliation(s)
- M Ge
- Department of Materials Science, University of Southern California, 3710 McClintock Avenue, Los Angeles, CA 90089, USA. Department of Electrical Engineering, University of Southern California, 3710 McClintock Avenue, Los Angeles, CA 90089, USA
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Page L, Kundra V, Rong J. SU-E-I-36: Investigation of Renal CT Dose Reduction by Using Model Based Iterative Reconstruction. Med Phys 2013. [DOI: 10.1118/1.4814146] [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: 11/07/2022] Open
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34
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Dodge C, Rong J. TU-C-103-09: CT Model-Based Iterative Reconstruction: How Much Dose Can We Save? Med Phys 2013. [DOI: 10.1118/1.4815398] [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: 11/07/2022] Open
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Abstract
PURPOSE To directly measure skin dose using point-dosimeters from dental cone-beam CT (CBCT) scans. To compare the results among three different dental CBCT scanners and compare the CBCT results with those from a conventional panoramic and cephalomic dental imaging system. METHODS A head anthropomorphic phantom was used with nanoDOT dosimeters attached to specified anatomic landmarks of selected radiosensitive tissues of interest. To ensure reliable measurement results, three dosimeters were used for each location. The phantom was scanned under various modes of operation and scan protocols for typical dental exams on three dental CBCT systems plus a conventional dental imaging system. The Landauer OSL nanoDOT dosimeters were calibrated under the same imaging condition as the head phantom scan protocols, and specifically for each of the imaging systems. Using nanoDOT dosimeters, skin doses at several positions on the surface of an adult head anthropomorphic phantom were measured for clinical dental imaging. RESULTS The measured skin doses ranged from 0.04 to 4.62mGy depending on dosimeter positions and imaging systems. The highest dose location was at the parotid surface for all three CBCT scanners. The surface doses to the locations of the eyes were ∼4.0mGy, well below the 500mGy threshold for possibly causing cataract development. The results depend on x-ray tube output (kVp and mAs) and also are sensitive to SFOV. Comparing to the conventional dental imaging system operated in panoramic and cephalometric modes, doses from all three CBCT systems were at least an order of magnitude higher. No image artifact was caused by presence of nanoDOT dosimeters in the head phantom images. CONCLUSIONS Direct measurements of skin dose using nanoDOT dosimeters provided accurate skin dose values without any image artifacts. The results of skin dose measurements serve as dose references in guiding future dose optimization efforts in dental CBCT imaging.
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Affiliation(s)
- S Akyalcin
- University of Texas Health Sciences Center at Houston, School of Dentistry, Houston, TX.,MD Anderson Cancer Center, Houston, TX
| | - J English
- University of Texas Health Sciences Center at Houston, School of Dentistry, Houston, TX.,MD Anderson Cancer Center, Houston, TX
| | - K Abramovitch
- University of Texas Health Sciences Center at Houston, School of Dentistry, Houston, TX.,MD Anderson Cancer Center, Houston, TX
| | - J Rong
- University of Texas Health Sciences Center at Houston, School of Dentistry, Houston, TX.,MD Anderson Cancer Center, Houston, TX
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36
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Grebenstein C, Choi YH, Rong J, de Jong TJ, Tamis WLM. Metabolic fingerprinting reveals differences between shoots of wild and cultivated carrot (Daucus carota L.) and suggests maternal inheritance or wild trait dominance in hybrids. Phytochemistry 2011; 72:1341-7. [PMID: 21601898 DOI: 10.1016/j.phytochem.2011.04.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2011] [Revised: 04/11/2011] [Accepted: 04/15/2011] [Indexed: 05/25/2023]
Abstract
Differences between the metabolic content of cultivars and their related wild species not only have implications for breeding and food quality, but also for the increasingly studied area of crop to wild introgression. Wild and cultivated western carrots belong to the same outcrossing species and hybridize under natural conditions. The metabolic fingerprinting of Dutch wild carrot and of western orange carrot cultivar shoots using (1)H NMR showed only quantitative differences in chemical content, indicating relatively low divergence after domestication. Main differences reside in the primary metabolite content and in the concentrations of chlorogenic acid and feruloyl quinic acid in the shoots of the different carrot types. Wild×cultivar hybrids cannot be distinguished from wild plants based on the metabolome, suggesting maternal, maternal environment, or dominance effects, and indicating high hybrid fitness in wild conditions. Considering these similarities, introgression is a real possibility in carrots, but understanding its consequences would require further studies using backcrosses in a multiple environments.
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Affiliation(s)
- C Grebenstein
- Institute of Environmental Sciences, Leiden University, P.O. Box 9518, 2300 RA Leiden, The Netherlands.
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Linas BP, Wang B, Smurzynski M, Losina E, Bosch RJ, Schackman BR, Rong J, Sax PE, Walensky RP, Schouten J, Freedberg KA. The impact of HIV/HCV co-infection on health care utilization and disability: results of the ACTG Longitudinal Linked Randomized Trials (ALLRT) Cohort. J Viral Hepat 2011; 18:506-12. [PMID: 20546501 PMCID: PMC3347883 DOI: 10.1111/j.1365-2893.2010.01325.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [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] [Indexed: 12/18/2022]
Abstract
HIV/hepatitis C virus (HCV) co-infection places a growing burden on the HIV/AIDS care delivery system. Evidence-based estimates of health services utilization among HIV/HCV co-infected patients can inform efficient planning. We analyzed data from the ACTG Longitudinal Linked Randomized Trials (ALLRT) cohort to estimate resource utilization and disability among HIV/HCV co-infected patients and compare them to rates seen in HIV mono-infected patients. The analysis included HIV-infected subjects enrolled in the ALLRT cohort between 2000 and 2007 who had at least one CD4 count measured and completed at least one resource utilization data collection form (N = 3143). Primary outcomes included the relative risk of hospital nights, emergency department (ED) visits, and disability days for HIV/HCV co-infected vs HIV mono-infected subjects. When controlling for age, sex, race, history of AIDS-defining events, current CD4 count and current HIV RNA, the relative risk of hospitalization, ED visits, and disability days for subjects with HIV/HCV co-infection compared to those with HIV mono-infection were 1.8 (95% CI: 1.3-2.5), 1.7 (95% CI: 1.4-2.1), and 1.6 (95% CI: 1.3-1.9) respectively. Programs serving HIV/HCV co-infected patients can expect approximately 70% higher rates of utilization than expected from a similar cohort of HIV mono-infected patients.
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Affiliation(s)
- B. P. Linas
- Divisions of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA,General Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - B. Wang
- The Harvard University Center for AIDS Research (CFAR), Boston, MA, USA
| | - M. Smurzynski
- Department of Biostatistics, Harvard School of Public Health, Boston, MA, USA
| | - E. Losina
- The Harvard University Center for AIDS Research (CFAR), Boston, MA, USA,Department of Orthopedic Surgery Brigham and Women’s Hospital, Boston, MA, USA,Departments of Biostatistics and Epidemiology, Boston University School of Public Health, Boston, MA, USA
| | - R. J. Bosch
- Department of Biostatistics, Harvard School of Public Health, Boston, MA, USA
| | - B. R. Schackman
- Department of Public Health, Weill Cornell Medical College, New York, NY, USA
| | - J. Rong
- Departments of Biostatistics and Epidemiology, Boston University School of Public Health, Boston, MA, USA
| | - P. E. Sax
- The Harvard University Center for AIDS Research (CFAR), Boston, MA, USA,Division of Infectious Diseases, Brigham and Women’s Hospital, Boston, MA, USA
| | - R. P. Walensky
- Divisions of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA,The Harvard University Center for AIDS Research (CFAR), Boston, MA, USA,Division of Infectious Diseases, Brigham and Women’s Hospital, Boston, MA, USA
| | - J. Schouten
- Department of Surgery, University of Washington, Seattle, WA, USA
| | - K. A. Freedberg
- Divisions of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA,General Medicine, Massachusetts General Hospital, Boston, MA, USA,The Harvard University Center for AIDS Research (CFAR), Boston, MA, USA,Departments of Biostatistics and Epidemiology, Boston University School of Public Health, Boston, MA, USA
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Rong J, Kappadath SC, Schellingerhout D. TH-A-214-09: Direct Measurement of Skin Dose from CT Brain Perfusion Scans. Med Phys 2011. [DOI: 10.1118/1.3613474] [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: 11/07/2022] Open
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Siman W, Kappadath SC, Rong J. SU-E-I-64: Weekly Exposure Contributions from Radioactive Patients in A Busy Comprehensive Imaging Center. Med Phys 2011. [DOI: 10.1118/1.3611637] [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: 11/07/2022] Open
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40
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Tao J, Wei W, Nan L, Lei L, Hui H, Fen G, Jun L, Jing Z, Rong J. Development of competitive indirect ELISA for the detection of tetrodotoxin and a survey of the distribution of tetrodotoxin in the tissues of wild puffer fish in the waters of south-east China. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2010; 27:1589-97. [DOI: 10.1080/19440049.2010.504237] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [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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Lee DS, Larson MG, Lunetta KL, Dupuis J, Rong J, Keaney JF, Lipinska I, Baldwin CT, Vasan RS, Benjamin EJ. Clinical and genetic correlates of soluble P-selectin in the community. J Thromb Haemost 2008; 6:20-31. [PMID: 17944986 DOI: 10.1111/j.1538-7836.2007.02805.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND P-selectin is a cell adhesion molecule that is involved in atherogenesis, and soluble concentrations of this biomarker reflect cardiovascular risk. However, the clinical correlates and genetic characterization of soluble P-selectin have not been clearly elucidated. OBJECTIVE To describe clinical and genetic correlates of circulating P-selectin in the community. METHODS In Framingham Heart Study Offspring (European descent) and Omni (ethnic/racial minority) participants, we examined the association of cardiovascular risk factors with soluble P-selectin concentrations. In Offspring participants, we evaluated heritability, linkage and association of 29 SELP single-nucleotide polymorphisms (SNPs) with adjusted P-selectin concentrations. RESULTS In multivariable analysis of 3,690 participants (54% women, mean age 60 +/- 10 years), higher log-transformed P-selectin concentrations were inversely associated with female sex and hormone replacement therapy, and positively associated with age, ethnic/racial minority status, cigarette smoking, waist circumference, systolic blood pressure, fasting glucose, and total/high-density lipoprotein cholesterol and triglyceride concentrations. Clinical factors explained 10.4% of the interindividual variability in P-selectin concentrations. In 571 extended pedigrees (n = 1,841) with >or= 2 phenotyped members per family, multivariable-adjusted heritability was 45.4 +/- 5.8%. Among the SELP SNPs examined, a non-synonymous SNP (rs6136) encoding a threonine-to-proline substitution at position 715 was highly significantly associated with decreased P-selectin concentrations (P = 5.2 x 10(-39)), explaining 9.7% of variation after adjustment for clinical factors. CONCLUSIONS Multiple clinical factors and an SNP in the SELP gene were significantly associated with circulating P-selectin concentrations. One SNP in SELP explained significant variation in circulating P-selectin concentrations, even after accounting for known clinical correlates.
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Affiliation(s)
- D S Lee
- Institute for Clinical Evaluative Sciences and University Health Network, University of Toronto, Toronto, ON, Canada
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Rabie HR, Rong J, Glavinović MI. Monte Carlo simulation of release of vesicular content in neuroendocrine cells. Biol Cybern 2006; 94:483-99. [PMID: 16550439 DOI: 10.1007/s00422-006-0061-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2005] [Accepted: 02/15/2006] [Indexed: 05/07/2023]
Abstract
The release of transmitter from the vesicle, its diffusion through the fusion pore, and the cleft and its interaction with the carbon electrode were simulated using the Monte Carlo method. According to the simulation the transmitter release is largely determined by geometric factors--the ratio of the fusion pore cross-sectional and vesicular areas, if the diffusion constant is as in the aqueous solution--but the speed of transmitter dissociation from the gel matrix plays an important role during the rise phase of release. Transmitter is not depleted near the entrance to the fusion pore and there is no cleft-to-vesicle feedback, but the depletion becomes evident if the diffusion constant is reduced, especially if the pore is wide. In general, the time course of amperometric currents closely resembles the time course of the simulated transmitter concentration in the cleft and the time course of release. Surprisingly, even a tenfold change of the electrode efficiency has only a marginal effect on the amplitude or the time course of amperometric currents. Greater electrode efficiency however lowers the cleft concentration, but only if the cleft is narrow. As the cleft widens the current amplitudes diminish and rise times lengthen, but the decay times are less affected. Moreover, the amplitude dependence of the rise and decay times becomes steeper as the cleft widens and/or as the release kinetics slows. Finally, lower diffusion constant of transmitter in the narrow cleft does not further prolong the amperometric currents, whose slow time course reflects slow release kinetics.
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Affiliation(s)
- H R Rabie
- Department of Applied Chemical Sciences, Ryerson Polytechnic University, Toronto, ON, Canada
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Feng B, Yao P, Li Y, Devlin C, Zhang D, Harding H, Sweeney M, Rong J, Kuriakose G, Fisher E, Marks A, Ron D, Tabas I. 2WS11-1 Signal transduction pathways in free cholesterol-loaded macrophages: Cell biological insight into the progression of atherosclerosis. ATHEROSCLEROSIS SUPP 2003. [DOI: 10.1016/s1567-5688(03)90425-9] [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: 11/17/2022]
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Rong J, Habuchi H, Kimata K, Lindahl U, Kusche-Gullberg M. Substrate specificity of the heparan sulfate hexuronic acid 2-O-sulfotransferase. Biochemistry 2001; 40:5548-55. [PMID: 11331020 DOI: 10.1021/bi002926p] [Citation(s) in RCA: 84] [Impact Index Per Article: 3.7] [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: 11/30/2022]
Abstract
The interaction of heparan sulfate with different ligand proteins depends on the precise location of O-sulfate groups in the polysaccharide chain. We have previously shown that overexpression in human kidney 293 cells of a mouse mastocytoma 2-O-sulfotransferase (2-OST), previously thought to catalyze the transfer of sulfate from 3'-phosphoadenosine 5'-phosphosulfate to C2 of L-iduronyl residues, preferentially increases the level of 2-O-sulfation of D-glucuronyl units [Rong, J., Habuchi, H., Kimata, K., Lindahl, U., and Kusche-Gullberg, M. (2000) Biochem. J. 346, 463-468]. In the study presented here, we further investigated the substrate specificity of the mouse mastocytoma 2-OST. Different polysaccharide acceptor substrates were incubated with cell extracts from 2-OST-transfected 293 cells together with the sulfate donor 3'-phosphoadenosine 5'-phospho[(35)S]sulfate. Incubations with O-desulfated heparin, predominantly composed of [(4)alphaIdoA(1)-(4)alphaGlcNSO(3)(1)-](n)(), resulted in 2-O-sulfation of iduronic acid. When, on the other hand, an N-sulfated capsular polysaccharide from Escherichia coli K5, with the structure [(4)betaGlcA(1)-(4)alphaGlcNSO(3)(1)-](n)(), was used as an acceptor, sulfate was transferred almost exclusively to C2 of glucuronic acid. Substrates containing both iduronic and glucuronic acid residues in about equal proportions strongly favored sulfation of iduronic acid. In agreement with these results, the 2-OST was found to have a approximately 5-fold higher affinity for iduronic acid-containing substrate disaccharide units (K(m) approximately 3.7 microM) than for glucuronic acid-containing substrate disaccharide units (K(m) approximately 19.3 microM).
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Affiliation(s)
- J Rong
- Department of Medical Biochemistry and Microbiology, University of Uppsala, Sweden
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Rong J, Qiu H, Wang S. Advanced glycosylation end products, protein kinase C and renal alterations in diabetic rats. Chin Med J (Engl) 2000; 113:1087-91. [PMID: 11776142] [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: 02/23/2023] Open
Abstract
OBJECTIVE To study the relationship between advanced glycosylation end products (AGE) and protein kinase C (PKC), and their effects on renal alteration in diabetic rats. METHODS Insulin or aminoguanidine was administered to diabetic rats. Blood glucose, hemoglobin A1c (HbA1c), glomerular tissue extracts AGE (GTE-AGE), PKC, glomerular basement membrane thickness (GBMT) and urine protein/creatinine (Pr/Cr) ratio in diabetic rats were measured and analysed. RESULTS Levels of blood glucose, HbA1c and AGE, PKC activity, the Pr/Cr ratio and GBMT were all significantly increased (P values all less than 0.01) in diabetic rats. Insulin could decrease the formation of HbA1c and AGE, and improve PKC activity. Aminoguanidine had no influence on PKC activity (P > 0.05) although it decreased the formation of AGE. Both drugs could delay the increase of urine Pr/Cr ratio and GBMT (P < 0.05 or P < 0.01). CONCLUSIONS Chronic hyperglycemia may lead to an increase of PKC activity. HbA1c and AGE may not directly contribute to alterations of PKC activity, but the increase of PKC activity could promote the action of AGE on GBM thickening. It is important to inhibit the formation of AGE and reduce the PKC activity so as to prevent or delay the development of diabetic nephropathy.
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Affiliation(s)
- J Rong
- Department of Endocrinology, Daping Hospital of Third Military Medical University, Chongquing 400042, China.
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Rong J, Habuchi H, Kimata K, Lindahl U, Kusche-Gullberg M. Expression of heparan sulphate L-iduronyl 2-O-sulphotransferase in human kidney 293 cells results in increased D-glucuronyl 2-O-sulphation. Biochem J 2000; 346 Pt 2:463-8. [PMID: 10677367 PMCID: PMC1220874] [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: 02/15/2023]
Abstract
Functionally important interactions between heparan sulphate and a variety of proteins depend on the precise location of O-sulphate groups. Such residues occur at C-2 of L-iduronic (IdoA) and D-glucuronic acid (GlcA) units, and at C-3 and C-6 of D-glucosamine (GlcN) units. Stable transfection of human embryonic kidney 293 cells with a cDNA encoding mouse mastocytoma IdoA 2-O-sulphotransferase resulted in an approx. 6-fold increase in O-sulphotransferase activity, compared with control cells, as determined using O-desulphated heparin as an acceptor. Structural analysis of endogenous heparan sulphate in the transfected cells, following metabolic labelling with either [(3)H]GlcN or [(35)S]sulphate, showed appreciable formation of -GlcA(2-OSO(3))-GlcNSO(3)- disaccharide units (6% of total disaccharide units; 17% of total O-sulphated disaccharide units) that were essentially absent from heparan sulphate from control cells. The increase in GlcA 2-O-sulphation was accompanied by a decrease in the amount of IdoA formed, whereas overall 2-O-sulphation or 6-O-sulphation remained largely unaffected. These findings indicate that 2-O-sulphation of IdoA and GlcA residues is catalysed by the same enzyme in heparan sulphate biosynthesis.
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Affiliation(s)
- J Rong
- Department of Medical Biochemistry and Microbiology, University of Uppsala, The Biomedical Center, Box 582, S-751 23 Uppsala, Sweden
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Abstract
Heparin and heparan sulfate are structurally related polysaccharides with a variety of biological effects/functions. Most of these effects are due to interactions, of varying specificity, between the negatively charged polysaccharide chains and proteins. While such interactions generally involve a single saccharide domain of decasaccharide size or less, ternary complexes of two protein molecules binding to separate domains on a single polysaccharide chain are known to occur. To facilitate studies on domain organization and its importance for biological function a strategy was developed to chemically conjugate defined heparin oligomers in linear and chemoselective fashion. The procedure requires that the oligosaccharide to provide the reducing-terminal domain of the conjugate is generated by lyase degradation of a parent polysaccharide, whereas the nonreducing-terminal domain is obtained through deaminative cleavage with nitrous acid. The applicability of the method was demonstrated by constructing a conjugate composed of two heparin 12-mers, of which the reducing-terminal component contained the antithrombin-binding region, whereas the nonreducing-terminal domain did not. Contrary to any of the unconjugated oligomers, the product was found to efficiently promote the inactivation of thrombin by antithrombin.
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Affiliation(s)
- J Rong
- Department of Medical Biochemistry and Microbiology, Box 582, The Biomedical Center, Uppsala University, S-751 23 Uppsala, Sweden
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Abstract
The role of polyphenols in human nutrition is discussed on the basis of their redox chemistry, which accounts for the observed antioxidant effect and in turn for their protective effect against atherosclerosis. Epidemiologic data, together with experimental pathology and cell biology, support the recommendation that optimal nutrition should contain polyphenols in amounts that may be better described as a "Recommended Optimal Intake" (ROI) than as a "Recommended Dietary Allowance" (RDA). Because a valid procedure to identify polyphenols in plasma is not available, analysis of plasma antioxidant capacity is instead suggested as a suitable index to define the optimal nutritional intake.
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Affiliation(s)
- F Ursini
- Department of Biological Chemistry, University of Padova, Italy
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Jo H, Sipos K, Go YM, Law R, Rong J, McDonald JM. Differential effect of shear stress on extracellular signal-regulated kinase and N-terminal Jun kinase in endothelial cells. Gi2- and Gbeta/gamma-dependent signaling pathways. J Biol Chem 1997; 272:1395-401. [PMID: 8995450 DOI: 10.1074/jbc.272.2.1395] [Citation(s) in RCA: 221] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Shear stress differentially regulates production of many vasoactive factors at the level of gene expression in endothelial cells that may be mediated by mitogen-activated protein kinases, including extracellular signal-regulated kinase (ERK) and N-terminal Jun kinase (JNK). Here we show, using bovine aortic endothelial cells (BAEC), that shear stress differentially regulates ERK and JNK by mechanisms involving Gi2 and pertussis toxin (PTx)-insensitive G-protein-dependent pathways, respectively. Shear activated ERK with a rapid, biphasic time course (maximum by 5 min and basal by 30-min shear exposure) and force dependence (minimum and maximum at 1 and 10 dyn/cm2 shear stress, respectively). PTx treatment prevented shear-dependent activation of ERK1/2, consistent with a Gi-dependent mechanism. In contrast, JNK activity was maximally turned on by a threshold level of shear force (0.5 dyn/cm2 or higher) with a much slower and prolonged time course (requiring at least 30 min to 4 h) than that of ERK. Also, PTx had no effect on shear-dependent activation of JNK. To further define the shear-sensitive ERK and JNK pathways, vectors expressing hemagglutinin epitope-tagged ERK (HA-ERK) or HA-JNK were co-transfected with other vectors by using adenovirus-polylysine in BAEC. Expression of the mutant (alpha)i2(G203), antisense G(alpha)i2 and a dominant negative Ras (N17Ras) prevented shear-dependent activation of HA-ERK, while that of (alpha)i2(G204) and antisense (alpha)i3 did not. Expression of a Gbeta/gamma scavenger, the carboxyl terminus of beta-adrenergic receptor kinase (betaARK-ct), and N17Ras inhibited shear-dependent activation of HA-JNK. Treatment of BAEC with genistein prevented shear-dependent activation of ERK and JNK, indicating the essential role of tyrosine kinase(s) in both ERK and JNK pathways. These results provide evidence that 1) Gi2-protein, Ras, and tyrosine kinase(s) are upstream regulators of shear-dependent activation of ERK and 2) that shear-dependent activation of JNK is regulated by mechanisms involving Gbeta/gamma, Ras, and tyrosine kinase(s).
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Affiliation(s)
- H Jo
- Department of Pathology, University of Alabama at Birmingham, 35294, USA.
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Ding A, Guo R, Rong J. [Determination of paeonol in carbonized bark of Paeonia suffruticosa Andr. by HPLC]. Zhongguo Zhong Yao Za Zhi 1996; 21:23-4, 63. [PMID: 8703347] [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] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The contents of paeonol in prepared pieces of carbonized bark of Paeonia suf fruticosa were determined by HPLC. The result shows that the contents of paeonol decrease with the rise of temperature and the extension of time in processing.
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Affiliation(s)
- A Ding
- Nanjing College of Traditional Chinese Medicine
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