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Ren YL, Lei JT, Zhang TR, Lu P, Cui DD, Yang B, Zhao GY, Peng F, Cao ZX, Peng C, Li YZ. Isobavachalcone, a natural sirtuin 2 inhibitor, exhibits anti-triple-negative breast cancer efficacy in vitro and in vivo. Phytother Res 2024; 38:1815-1829. [PMID: 38349045 DOI: 10.1002/ptr.8143] [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: 04/28/2023] [Revised: 01/19/2024] [Accepted: 01/22/2024] [Indexed: 04/10/2024]
Abstract
Triple-negative breast cancer (TNBC) is the most aggressive and lethal clinical subtype and lacks effective targeted therapies at present. Isobavachalcone (IBC), the main active component of Psoralea corylifolia L., has potential anticancer effects. Herein, we identified IBC as a natural sirtuin 2 (SIRT2) inhibitor and characterized the potential mechanisms underlying the inhibition of TNBC. Molecular dynamics analysis, enzyme activity assay, and cellular thermal shift assay were performed to evaluate the combination of IBC and SIRT2. The therapeutic effects, mechanism, and safety of IBC were analyzed in vitro and in vivo using cellular and xenograft models. IBC effectively inhibited SIRT2 enzyme activity with an IC50 value of 0.84 ± 0.22 μM by forming hydrogen bonds with VAL233 and ALA135 within its catalytic domain. In the cellular environment, IBC bound to and stabilized SIRT2, consequently inhibiting cellular proliferation and migration, and inducing apoptosis and cell cycle arrest by disrupting the SIRT2/α-tubulin interaction and inhibiting the downstream Snail/MMP and STAT3/c-Myc pathways. In the in vivo model, 30 mg/kg IBC markedly inhibited tumor growth by targeting the SIRT2/α-tubulin interaction. Furthermore, IBC exerted its effects by inducing apoptosis in tumor tissues and was well-tolerated. IBC alleviated TNBC by targeting SIRT2 and triggering the reactive oxygen species ROS/β-catenin/CDK2 axis. It is a promising natural lead compound for future development of SIRT2-targeting drugs.
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Affiliation(s)
- Ya-Li Ren
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Jie-Ting Lei
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Ting-Rui Zhang
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Peng Lu
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Dan-Dan Cui
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Bo Yang
- West China School of Pharmacy, Sichuan University, Chengdu, China
- Department of Pharmacy, The Seventh People's Hospital of Chengdu, Chengdu, China
- Department of Pharmacy, Panzhihua Central Hospital, Dali University, Panzhihua, China
| | - Gui-Ying Zhao
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Fu Peng
- West China School of Pharmacy, Sichuan University, Chengdu, China
| | - Zhi-Xing Cao
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Cheng Peng
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Yu-Zhi Li
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
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Zhang YH, Li XY, Song BR, Wang YL, Zhang JR, Ren YL. [Clinical phenotype and genetic analysis of patients with left ventricular noncompaction caused by the biallelic mutation of MYBPC3 and MYH7]. Zhonghua Xin Xue Guan Bing Za Zhi 2023; 51:1160-1165. [PMID: 37963751 DOI: 10.3760/cma.j.cn112148-20230929-00200] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 11/16/2023]
Abstract
Objective: To explore the relationship between pathogenic gene, mutation and phenotype of left ventricular noncompaction (LVNC) patients and their family members. Methods: The subjects were the proband with LVNC and her family members. The medical history including electrocardiogram, echocardiography and cardiac magnetic resonance examination of the proband and family members were collected. Whole exome sequencing of the proband was performed, bioinformatics analysis focused on the genes related to hereditary cardiomyopathy. Candidate pathogenic sites were validated by Sanger sequencing. The clinical interpretation of sequence variants were classified according to American College of Medical Genetics and Genomics (ACMG) guidelines. Results: The proband carried a heterozygous variation of the MYBPC3 gene c.C2827T and the MYH7 gene c.G2221C. The proband's sister carried heterozygous variation of MYBPC3 gene c.C2827T. According to the ACMG guidelines, the variant was determined to be pathogenic. Conclusion: The missense variant of MYBPC3 gene c.C2827T and MYH7 gene c.G2221C are identified from the proband with LVNC and her family member, which provides a genetic basis for clinical diagnosis and genetic counseling of the patients and the family members with LVNC.
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Affiliation(s)
- Y H Zhang
- Department of Acute Coronary Syndrome Ward, Center for Coronary Artery Disesse, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - X Y Li
- Beijing Anzhen Hospital, Capital Medical University, Beijing Institute of Heart Lung and Blood Vessel Diseases, Key Laboratory of Remodeling-Related Cardiovascular Disease of the Ministry of Education, Beijing 100029, China
| | - B R Song
- Department of Cardiac Surgery, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - Y L Wang
- Department of Echocardiography, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - J R Zhang
- Department of Cardiology, Shanxi Cardiovascular Hospital, Taiyuan 030024, China
| | - Y L Ren
- Intensive Care Unit, Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing Engineering Research Center of Cardiovascular Wisdom Diagnosis and Treatment, Beijing 100029, China
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Ren YL, Li Y, Gao J, Zhou XJ, Yang L, Wang SX. Pathological and clinical characteristics of late-onset oligomeganephronia based on a histomorphometric study. BMC Nephrol 2023; 24:54. [PMID: 36922764 PMCID: PMC10018837 DOI: 10.1186/s12882-023-03096-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 10/19/2022] [Accepted: 02/24/2023] [Indexed: 03/17/2023] Open
Abstract
BACKGROUND Late-onset oligomeganephronia (OMN) is a rare chronic kidney disease and has no quantitative criteria for diagnosis yet. The current study aimed to explore its clinicopathological features by histomorphometric analysis. METHODS We retrospectively re-reviewed all patients with enlarged and sparse glomeruli by light microscopy at Peking University First Hospital from 2012 to 2021, excluding those with any factor known to contribute to similar changes. Age- and sex-matched patients with thin basement membrane nephropathy were selected as control to establish the cut-off values for glomerulomegaly and rarity. Late-onset OMN cases were then confirmed and the clinicopathological characteristics were summarized. RESULTS Mean diameter and density of cortical glomeruli in control was 156.53 ± 27.50 μm and 4.07 ± 0.63 /mm2, giving a lower limit of 211.53 μm for glomerulomegaly and an upper of 2.81 /mm2 for rarity. Seven adults of three females and four males were finally diagnosed as late-onset OMN with a mean age of 26.57 years. They showed mild to moderate proteinuria and/or renal dysfunction at biopsy with the mean proteinuria, serum creatinine (Scr) level, and estimated glomerular filtration rate of 0.50 g/d (0.10-0.95 g/d), 140.9 µmol/L (95.1-227.1 µmol/L), and 58.7 mL/min/1.73m2 (21.3-98.0 mL/min/1.73m2), respectively. Four patients (57.1%) had normal Scr at diagnosis. Six patients with available data showed renal tubular injury with increased urinary microalbumin in all, elevated N-acetyl-β-glucosaminidase in two, and elevated α1 microglobulin in five. Kidney size was normal or slightly reduced. The mean density and glomerular diameter of the seven cases was 0.86 mm2 (0.55-1.41 /mm2) and 229.73 μm (211.88-260.66 μm). Segmental glomerular sclerosis was observed in six (85.7%) with four (66.7%) of perihilar type. Proximal tubule dilation was observed in all, focal to diffuse, lining with enlarged epithelial cells. The mean foot process width was 634.02 nm, wider than 472.54 nm of the control (P = 0.0002). CONCLUSION Late-onset OMN should be considered a special entity with relatively slow clinical progress characterized by hypertrophy of the sparsely distributed nephron.
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Affiliation(s)
- Ya-Li Ren
- Laboratory of Electron Microscopy, Pathological Center, Peking University First Hospital, No. 8, Xishiku Street, Beijing, 100034, People's Republic of China
| | - Yang Li
- Renal Division, Department of Medicine, Institute of Nephrology, Key Laboratory of Renal Disease, Key Laboratory of CKD Prevention and Treatment, Peking University First Hospital, Peking University, Ministry of Health of China, Ministry of Education of China, Beijing, People's Republic of China
| | - Jie Gao
- Department of Clinical Laboratory, Tongji Shanxi Hospital, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Third Hospital of Shanxi Medical University, Taiyuan, People's Republic of China
| | - Xu-Jie Zhou
- Renal Division, Department of Medicine, Institute of Nephrology, Key Laboratory of Renal Disease, Key Laboratory of CKD Prevention and Treatment, Peking University First Hospital, Peking University, Ministry of Health of China, Ministry of Education of China, Beijing, People's Republic of China
| | - Li Yang
- Renal Division, Department of Medicine, Institute of Nephrology, Key Laboratory of Renal Disease, Key Laboratory of CKD Prevention and Treatment, Peking University First Hospital, Peking University, Ministry of Health of China, Ministry of Education of China, Beijing, People's Republic of China
| | - Su-Xia Wang
- Laboratory of Electron Microscopy, Pathological Center, Peking University First Hospital, No. 8, Xishiku Street, Beijing, 100034, People's Republic of China.
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Ning XL, Li YZ, Huo C, Deng J, Gao C, Zhu KR, Wang M, Wu YX, Yu JL, Ren YL, Luo ZY, Li G, Chen Y, Wang SY, Peng C, Yang LL, Wang ZY, Wu Y, Qian S, Li GB. X-ray Structure-Guided Discovery of a Potent, Orally Bioavailable, Dual Human Indoleamine/Tryptophan 2,3-Dioxygenase (hIDO/hTDO) Inhibitor That Shows Activity in a Mouse Model of Parkinson's Disease. J Med Chem 2021; 64:8303-8332. [PMID: 34110158 DOI: 10.1021/acs.jmedchem.1c00303] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 01/19/2023]
Abstract
Human indoleamine 2,3-dioxygenase 1 (hIDO1) and tryptophan 2,3-dioxygenase (hTDO) have been closely linked to the pathogenesis of Parkinson's disease (PD); nevertheless, development of dual hIDO1 and hTDO inhibitors to evaluate their potential efficacy against PD is still lacking. Here, we report biochemical, biophysical, and computational analyses revealing that 1H-indazole-4-amines inhibit both hIDO1 and hTDO by a mechanism involving direct coordination with the heme ferrous and ferric states. Crystal structure-guided optimization led to 23, which manifested IC50 values of 0.64 and 0.04 μM to hIDO1 and hTDO, respectively, and had good pharmacokinetic properties and brain penetration in mice. 23 showed efficacy against the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine-induced mouse motor coordination deficits, comparable to Madopar, an anti-PD medicine. Further studies revealed that different from Madopar, 23 likely has specific anti-PD mechanisms involving lowering IDO1 expression, alleviating dopaminergic neurodegeneration, reducing inflammatory cytokines and quinolinic acid in mouse brain, and increasing kynurenic acid in mouse blood.
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MESH Headings
- 1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine
- Animals
- Brain/pathology
- Cell Line, Tumor
- Crystallography, X-Ray
- Enzyme Inhibitors/chemical synthesis
- Enzyme Inhibitors/metabolism
- Enzyme Inhibitors/therapeutic use
- Humans
- Indazoles/chemical synthesis
- Indazoles/metabolism
- Indazoles/therapeutic use
- Indoleamine-Pyrrole 2,3,-Dioxygenase/antagonists & inhibitors
- Indoleamine-Pyrrole 2,3,-Dioxygenase/metabolism
- Male
- Mice, Inbred C57BL
- Molecular Docking Simulation
- Molecular Structure
- Neuroprotective Agents/chemical synthesis
- Neuroprotective Agents/metabolism
- Neuroprotective Agents/therapeutic use
- Parkinson Disease, Secondary/chemically induced
- Parkinson Disease, Secondary/drug therapy
- Parkinson Disease, Secondary/pathology
- Protein Binding
- Structure-Activity Relationship
- Tryptophan Oxygenase/antagonists & inhibitors
- Tryptophan Oxygenase/metabolism
- Mice
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Affiliation(s)
- Xiang-Li Ning
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Yu-Zhi Li
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Cui Huo
- Department of Pharmaceutical Engineering, College of Food and Bioengineering, Xihua University, Chengdu 610039, China
| | - Ji Deng
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Cheng Gao
- Department of Pharmaceutical Engineering, College of Food and Bioengineering, Xihua University, Chengdu 610039, China
| | - Kai-Rong Zhu
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Miao Wang
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Yu-Xiang Wu
- Department of Pharmaceutical Engineering, College of Food and Bioengineering, Xihua University, Chengdu 610039, China
| | - Jun-Lin Yu
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Ya-Li Ren
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Zong-Yuan Luo
- Department of Pharmaceutical Engineering, College of Food and Bioengineering, Xihua University, Chengdu 610039, China
| | - Gen Li
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Yang Chen
- Department of Pharmaceutical Engineering, College of Food and Bioengineering, Xihua University, Chengdu 610039, China
| | - Si-Yao Wang
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Cheng Peng
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Ling-Ling Yang
- Department of Pharmaceutical Engineering, College of Food and Bioengineering, Xihua University, Chengdu 610039, China
| | - Zhou-Yu Wang
- Department of Pharmaceutical Engineering, College of Food and Bioengineering, Xihua University, Chengdu 610039, China
| | - Yong Wu
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Shan Qian
- Department of Pharmaceutical Engineering, College of Food and Bioengineering, Xihua University, Chengdu 610039, China
| | - Guo-Bo Li
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
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Li LF, Wang ZB, Han CG, Sun HQ, Wang R, Ren YL, Lin JQ, Pang X, Liu XM, Lin JQ, Chen LX. Optimal reference genes for real-time quantitative PCR and the expression of sigma factors in Acidithiobacillus caldus under various conditions. J Appl Microbiol 2021; 131:1800-1812. [PMID: 33754423 DOI: 10.1111/jam.15085] [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] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 03/02/2021] [Accepted: 03/18/2021] [Indexed: 12/01/2022]
Abstract
AIMS Acidithiobacillus caldus is an important sulphur-oxidizing bacterium that plays crucial roles in the bioleaching industry. This study aims to analyse the optimal reference gene for real-time quantitative PCR (RT-qPCR) under different conditions and investigate the transcription levels of the sigma factor genes in the stress response. METHODS AND RESULTS We selected six housekeeping genes and analysed them via RT-qPCR using two energy resources, under four stress conditions. Three statistical approaches BestKeeper, geNorm, and NormFinder were utilized to determine transcription stability of these reference genes. The gapdH gene was the best internal control gene using elemental sulphur as an energy resource and under heat stress, map was the best internal control gene under pH and osmotic stress, era was the best internal control gene for the K2 S4 O6 energy resource, and rpoC was the best internal control gene under Cu2+ stress. Furthermore, the expressional levels of 11 sigma factors were analysed by RT-qPCR in the stress response. CONCLUSIONS Stable internal control genes for RT-qPCR analysis of A. caldus were determined, and the expression patterns of sigma factor genes of A. caldus were investigated. SIGNIFICANCE AND IMPACT OF THE STUDY The identification of the optimal reference gene and analysis of transcription levels of sigma factors in A. caldus can provide clues for reference gene selection and the study of sigma factor function.
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Affiliation(s)
- L F Li
- Henan Neurodevelopment Engineering Research Center for Children, Henan Key Laboratory of Children's Genetics and Metabolic Diseases, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, China.,State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - Z B Wang
- Energy-rich Compounds Production by Photosynthetic Carbon Fixation Research Center, Shandong Key Lab of Applied Mycology, College of Life Sciences, Qingdao Agricultural University, Qingdao, China
| | - C G Han
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - H Q Sun
- Department of Neonatology, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, China
| | - R Wang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - Y L Ren
- Qingdao Longding Biotech Limited Company, Qingdao, China
| | - J Q Lin
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - X Pang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - X M Liu
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - J Q Lin
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - L X Chen
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
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Maimaitijuma T, Yu JH, Ren YL, Yang X, Liu H, Meng ZC, Wang R, Cui YP, Wu H, Pan LP, Jiao Y, Chen YY, Cao YP. PHF23 negatively regulates the autophagy of chondrocytes in osteoarthritis. Life Sci 2020; 253:117750. [PMID: 32380078 DOI: 10.1016/j.lfs.2020.117750] [Citation(s) in RCA: 7] [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: 03/07/2020] [Revised: 04/23/2020] [Accepted: 05/01/2020] [Indexed: 12/17/2022]
Abstract
AIM Osteoarthritis (OA) is the main cause of disability and joint replacement surgery in the elderly. As a crucial cell survival mechanism, autophagy has been reported to decrease in OA. PHF23 is a new autophagy inhibitor which was first reported by us previously. This study aimed to explore the anti-autophagic mechanism of PHF23 to make it a possible therapeutic target of OA. MAIN METHOD Lentiviral vectors specific to PHF23 were used on chondrocytes (C28/I2) to establish PHF23 overexpressed or knockdown stable cell strains. Interleukin (IL)-1β (10 ng/mL) and chloroquine (CQ, 25 uM) were used as an inducer of OA and inhibitor of lysosome, respectively. Autophagy was evaluated by autophagosome formation using transmission electron microscopy (TEM) and western blot analysis of P62 and LC3B on different groups of cells. Effects of PHF23 on OA were evaluated by collagen II immunofluorescent staining and western blot analysis of OA-associated proteins MMP13 and ADAMTS5. Effects of PHF23 on AMPK and mTOR/S6K pathways and mitophagy were determined by western blot analysis. KEY FINDINGS Knockdown of PHF23 enhanced IL-1β-induced autophagy, while overexpression of PHF23 exerted the opposite effect. Knockdown of PHF23 protected chondrocytes against IL-1β-induced OA by decreasing the levels of OA-associated proteins and increasing expression of Collagen II. Knockdown of PHF23 also increased mitophagy level and altered the phosphorylation levels of AMPK, mTOR, and S6K. SIGNIFICANCE PHF23 downregulates autophagy, mitophagy in IL-1β-induced OA-like chondrocytes and alters the activities of AMPK and mTOR/S6K, which suggests that PHF23 may be a possible therapeutic target for OA.
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Affiliation(s)
| | - Jia-Hong Yu
- Key Laboratory of Medical Immunology, Ministry of Health, Peking University Health Science Center, Beijing, China
| | - Ya-Li Ren
- Department of Electron Microscopy, Peking University First Hospital, Beijing, China
| | - Xin Yang
- Orthopedic Department, Peking University First Hospital, Beijing, China
| | - Heng Liu
- Orthopedic Department, Peking University First Hospital, Beijing, China
| | - Zhi-Chao Meng
- Orthopedic Department, Peking University First Hospital, Beijing, China
| | - Rui Wang
- Orthopedic Department, Peking University First Hospital, Beijing, China
| | - Yun-Peng Cui
- Orthopedic Department, Peking University First Hospital, Beijing, China
| | - Hao Wu
- Orthopedic Department, Peking University First Hospital, Beijing, China
| | - Li-Ping Pan
- Orthopedic Department, Peking University First Hospital, Beijing, China
| | - Yang Jiao
- Orthopedic Department, Peking University First Hospital, Beijing, China
| | - Ying-Yu Chen
- Key Laboratory of Medical Immunology, Ministry of Health, Peking University Health Science Center, Beijing, China
| | - Yong-Ping Cao
- Orthopedic Department, Peking University First Hospital, Beijing, China.
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Wang H, Liu JL, Wu XX, Zhang SQ, Zhang ZK, Pan WW, Yuan G, Yuan CL, Ren YL, Lei W. Ultra-long high quality catalyst-free WO 3 nanowires for fabricating high-performance visible photodetectors. Nanotechnology 2020; 31:274003. [PMID: 32209740 DOI: 10.1088/1361-6528/ab8327] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
This work presents a study on the controlled growth of WO3 nanowires via chemical vapor deposition without catalyst, and their potential applications in visible photodetectors. The influence of growth conditions on the morphology of WO3 nanowires is studied in order to understand the growth mechanism of WO3 nanowires, and ultra-long (60 [Formula: see text], the longest one ever reported) WO3 nanowires with a spindle shape are achieved by optimizing the growth conditions. It was found that the length of WO3 nanowires increases from 15 [Formula: see text] to 60 [Formula: see text] with increasing the argon carrier gas flow rate from 30 sccm to 90 sccm, and then saturates with further increasing the argon carrier gas flow rate. However, the length of WO3 nanowires reduces from 60 [Formula: see text] to 19 [Formula: see text] with increasing the tube inner pressure from 2.5 Torr to 3.5 Torr. The photoconductor detectors based on WO3 single nanowires present excellent device performance with a responsivity as high as 19 A W-1 at a bias of 0.1 V, a detectivity as high as 1.06 × 1011 Jones, and a response (rising and decay) time as short as 8 ms under the illumination of a 404 nm laser. These results indicate the great potential of WO3 nanowires for applications in fabricating high performance visible photodetectors.
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Affiliation(s)
- H Wang
- Department of Electrical, Electronic and Computer Engineering, The University of Western Australia, 35 Stirling Highway, Crawley 6009, Australia. These authors contributed to the work equally
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Ye Y, Zhang Q, Ren YL, Li JM. [A preliminary evaluation and discussion on the value of the medical content of book ' Zhu Bing Ⅰ', a medical bamboo compilation excavated from a Han dynasty tomb in Laoguanshan]. Zhonghua Yi Shi Za Zhi 2019; 48:143-146. [PMID: 30317823 DOI: 10.3760/cma.j.issn.0255-7053.2018.03.002] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The compilation of medical bamboo slips, which are excavated from a Han dynasty tomb in Laoguanshan(Mount. Laoguan), has two manuscripts: 'Zhu Bing Ⅰ(cases study Ⅰ)'and 'Zhu Bing Ⅱ(cases study Ⅱ)'. 'Zhu Bing Ⅰ'mainly discussed the pathogenic factor "wind" and "wind diseases" . It also analyzed the features of pathogenic factor "wind" . It classified the "wind diseases" into 17 kinds from 4 point views, and documented the symptoms of 17 kinds of "wind disease" . It was first time that its most ideas were documented in traditional Chinese medicine literatures.
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Affiliation(s)
- Y Ye
- Chengdu University of Traditional Chinese Medicine, Chengdu, 610075, China
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Ren YL, Sheng J, Zhou XY, Fang Y, Pan HM. [Clinical effect of icotinib in treatment of elderly advanced non-small cell lung cancer patients with EGFR mutations]. Zhonghua Zhong Liu Za Zhi 2019; 41:152-153. [PMID: 30862147 DOI: 10.3760/cma.j.issn.0253-3766.2019.02.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Y L Ren
- Department of Oncology, Shao Yifu Hospital Affiliated to Zhejiang University, Hangzhou 310016, China
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Wei QJ, Xu H, Guan N, Ren YL, Liu XY, Wu GH, Zhu SN. Overproduction of Mitochondrial Fission Proteins in Membranous Nephropathy in Children. Kidney Blood Press Res 2018; 43:1927-1934. [PMID: 30566949 DOI: 10.1159/000496006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [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: 06/26/2018] [Accepted: 12/05/2018] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND/AIMS The molecules involved in nephrotic syndrome (NS) have not been fully clarified. Mitochondrial fission proteins are found to be involved in podocyte injury in vitro. Increased glomerular expression of mitochondrial fission proteins was found in adriamycin nephropathy in our previous study. Whether or not mitochondrial fission proteins are involved in podocyte injury in NS is not clear. This study explored the glomerular expression and possible pathological significance of mitochondrial fission-associated proteins, including dynamin-related protein 1 (Drp1) and mitochondrial fission protein 1 (Fis1), in children with NS. METHODS Eighteen children with primary NS, including 6 with minimal change disease, 6 with focal segmental glomerulosclerosis, 6 with membranous nephropathy, 6 children with isolated haematuria and 3 normal controls were included. The glomerular expression of Drp1, phospho-Drp1 (Ser616) and Fis1, urinary protein measurements, and podocyte mitochondrial density under electron microscopy were investigated and compared. RESULTS Glomerular expression of Drp1, phospho-Drp1 (Ser616) and Fis1 was mainly increased in children with NS with membranous nephropathy. No relationship was found between glomerular expression of Drp1, phospho-Drp1 (Ser616) and Fis1 and podocyte mitochondrial density or urinary protein measurements. CONCLUSION Glomerular overproduction of Drp1, phospho-Drp1 (Ser 616) and Fis1 occurred mainly in children with membranous nephropathy. The pathological significance deserves further investigation.
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Affiliation(s)
- Qi-Jiao Wei
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Han Xu
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Na Guan
- Department of Pediatrics, Peking University First Hospital, Beijing, China,
| | - Ya-Li Ren
- Department of Electron microscopy, Peking University First Hospital, Beijing, China
| | - Xiao-Ya Liu
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Guo-Hong Wu
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Sai-Nan Zhu
- Department of Biostatistics, Peking University First Hospital, Beijing, China
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11
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Ye L, Ren YL, Xie LL, Luo YW, Lin PP, Zhou XP, Ma LY, Mei C, Xu WL, Wei JY, Jiang HF, Zhang LM, Zeng H, Tong HY. [A preliminary study on the outcome of lower-risk myelodysplastic syndrome by low-dose decitabine]. Zhonghua Xue Ye Xue Za Zhi 2018; 38:307-312. [PMID: 28468092 PMCID: PMC7342717 DOI: 10.3760/cma.j.issn.0253-2727.2017.04.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
目的 评价小剂量地西他滨治疗较低危骨髓增生异常综合征(MDS)患者的初步疗效及安全性,探讨MDS相关基因突变的临床意义。 方法 纳入浙江省4所医院收治的62例较低危MDS患者,治疗分2组,地西他滨组(地西他滨12 mg·m−2·d−1,连续5 d)和支持治疗组,检测与MDS预后相关的15项基因突变情况。比较两组患者的总体有效率(ORR)和无进展生存(PFS)时间,分析其与基因突变的相关性。 结果 62例患者中,可评估患者51例,其中地西他滨组24例,支持治疗组27例。与支持治疗组相比,地西他滨组的ORR(66.7%对29.6%,χ2=6.996,P=0.008)和中位PFS时间显著改善(未达到对13.7个月,P=0.037)。51例患者中20例(39.2%)检测到基因突变阳性,其中4例患者单纯SF3B1阳性,均在支持治疗组。与基因突变阴性患者相比,16例基因突变阳性(除单纯SF3B1阳性)患者中位PFS时间显著缩短(9.2个月对18.5个月,P=0.008),其中地西他滨组8例患者中6例有效,支持治疗组无一例(0/8)有效。地西他滨治疗期间主要不良反应为3~4级粒细胞减少(45.8%),3~4级感染发生率为33.3%(8/24)。 结论 该研究小系列患者的初步结果表明应用小剂量地西他滨治疗较低危MDS患者可能有效,对于基因突变患者也可获益,且患者耐受,值得临床试验进一步明确其临床意义。
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Affiliation(s)
- L Ye
- MDS Center, the First Affiliated Hospital, College of Medicine, Zhejiang University, Institute of Hematology, Zhejiang University, and Key Laboratory for Hematology of Zhejiang Province, Hangzhou 310009, China
| | | | | | | | | | | | | | | | | | | | | | | | | | - H Y Tong
- MDS Center, the First Affiliated Hospital, College of Medicine, Zhejiang University, Institute of Hematology, Zhejiang University, and Key Laboratory for Hematology of Zhejiang Province, Hangzhou 310009, China
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12
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Qi YY, Zhou XJ, Cheng FJ, Hou P, Ren YL, Wang SX, Zhao MH, Yang L, Martinez J, Zhang H. Increased autophagy is cytoprotective against podocyte injury induced by antibody and interferon-α in lupus nephritis. Ann Rheum Dis 2018; 77:1799-1809. [PMID: 30209031 DOI: 10.1136/annrheumdis-2018-213028] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 07/25/2018] [Accepted: 08/19/2018] [Indexed: 12/12/2022]
Abstract
OBJECTIVE More recent studies suggested that defects in autophagy contribute to the pathogenesis of SLE, especially in adaptive immunity. Occurrence and progression of lupus nephritis (LN) is the end result of complex interactions between regulation of immune responses and pathological process by renal resident cells, but there is still a lot of missing information for an establishment on the role of autophagy in pathogenesis of LN and as a therapy target. METHODS Systemic and organ-specific aetiologies of autophagy were first evaluated by autophagy protein quantification in tissue homogenates in MRL lpr/lpr lupus prone and female C57BL mice. Analysis of gene expression was also adopted in human blood and urine sediments. Then, some key mediators of the disease, including complement inactivated serum, IgG from patients with LN (IgG-LN) and interferon (IFN)-α were chosen to induce podocyte autophagy. Podocyte injuries including apoptosis, podocin derangement, albumin filtration and wound healing were monitored simultaneously with autophagy steady-state and flux. RESULTS Elevated LC3B in kidney homogenates and increased autophagosomes in podocyte from MRL lpr/lpr were observed. In humans, mRNA levels of some key autophagy genes were increased in blood and urinary sediments, and podocyte autophagosomes were observed in renal biopsies from patients with LN. Complement inactivated serum, IgG-LN and IFN-α could induce podocyte autophagy in a time-dependent and dosage-dependent manner, and by reactive oxygen species production and mTORC1 inhibition, respectively. Autophagy inhibition aggravated podocyte damage whereas its inducer relieved the injury. CONCLUSION Podocyte autophagy is activated in lupus-prone mice and patients with lupus nephritis. Increased autophagy is cytoprotective against antibody and interferon-α induced podocyte injury.
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Affiliation(s)
- Yuan-Yuan Qi
- Renal Division, Peking University First Hospital; Peking University Institute of Nephrology; Key Laboratory of Renal Disease, Ministry of Health of China; Key Laboratory of Chronic Kidney Disease Prevention and Treatment (Peking University), Ministry of Education, Beijing, China
| | - Xu-Jie Zhou
- Renal Division, Peking University First Hospital; Peking University Institute of Nephrology; Key Laboratory of Renal Disease, Ministry of Health of China; Key Laboratory of Chronic Kidney Disease Prevention and Treatment (Peking University), Ministry of Education, Beijing, China
| | - Fa-Juan Cheng
- Renal Division, Peking University First Hospital; Peking University Institute of Nephrology; Key Laboratory of Renal Disease, Ministry of Health of China; Key Laboratory of Chronic Kidney Disease Prevention and Treatment (Peking University), Ministry of Education, Beijing, China
| | - Ping Hou
- Renal Division, Peking University First Hospital; Peking University Institute of Nephrology; Key Laboratory of Renal Disease, Ministry of Health of China; Key Laboratory of Chronic Kidney Disease Prevention and Treatment (Peking University), Ministry of Education, Beijing, China
| | - Ya-Li Ren
- Laboratory of Electron Microscopy, Ultrastructural Pathology Center, Peking University First Hospital, Beijing, China
| | - Su-Xia Wang
- Laboratory of Electron Microscopy, Ultrastructural Pathology Center, Peking University First Hospital, Beijing, China
| | - Ming-Hui Zhao
- Renal Division, Peking University First Hospital; Peking University Institute of Nephrology; Key Laboratory of Renal Disease, Ministry of Health of China; Key Laboratory of Chronic Kidney Disease Prevention and Treatment (Peking University), Ministry of Education, Beijing, China
| | - Li Yang
- Renal Division, Peking University First Hospital; Peking University Institute of Nephrology; Key Laboratory of Renal Disease, Ministry of Health of China; Key Laboratory of Chronic Kidney Disease Prevention and Treatment (Peking University), Ministry of Education, Beijing, China
| | - Jennifer Martinez
- Immunity, Inflammation, and Disease Laboratory, NIEHS, National Institutes of Health, Research Triangle Park, Carolina, USA
| | - Hong Zhang
- Renal Division, Peking University First Hospital; Peking University Institute of Nephrology; Key Laboratory of Renal Disease, Ministry of Health of China; Key Laboratory of Chronic Kidney Disease Prevention and Treatment (Peking University), Ministry of Education, Beijing, China
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13
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Xu H, Guan N, Ren YL, Wei QJ, Tao YH, Yang GS, Liu XY, Bu DF, Zhang Y, Zhu SN. IP 3R-Grp75-VDAC1-MCU calcium regulation axis antagonists protect podocytes from apoptosis and decrease proteinuria in an Adriamycin nephropathy rat model. BMC Nephrol 2018; 19:140. [PMID: 29907098 PMCID: PMC6003198 DOI: 10.1186/s12882-018-0940-3] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [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: 01/12/2018] [Accepted: 06/04/2018] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND The mechanism of podocyte apoptosis is not fully understood. In addition, the role of the inositol 1,4,5-triphosphate receptor (IP3R)/glucose-regulated protein 75 (Grp75)/voltage-dependent anion channel 1 (VDAC1)/mitochondrial calcium uniporter (MCU) calcium regulation axis, which is located at sites of endoplasmic reticulum (ER) mitochondria coupling, in the mechanism of podocyte apoptosis is unclear. This study aimed to understand the roles of this axis in podocyte apoptosis and explore potential targets for podocyte protection. METHODS The expression of IP3R, Grp75, VDAC1, and MCU and mitochondrial Ca2+ were analyzed during Adriamycin- or angiotensin II-induced apoptosis in cultured mouse podocytes. The interaction between IP3R, Grp75, and VDAC1 was investigated using co-immunoprecipitation experiments. The effects of IP3R, Grp75, and MCU agonists and antagonists on mitochondrial Ca2+ and apoptosis were investigated in cultured podocytes. The podocyte-protective effects of an MCU inhibitor were further investigated in rats with Adriamycin-induced nephropathy. RESULTS Increased expression of IP3R, Grp75, VDAC1 and MCU, enhanced interaction among the IP3R-Grp75-VDAC1 complex, mitochondrial Ca2+ overload, and increased active caspase-3 levels were confirmed during Adriamycin- or angiotensin II-induced mouse podocyte apoptosis. Agonists of this axis facilitated mitochondrial Ca2+ overload and podocyte apoptosis, whereas specific antagonists against IP3R, Grp75, or MCU prevented mitochondrial Ca2+ overload and podocyte apoptosis. A specific MCU inhibitor prevented Adriamycin-induced proteinuria and podocyte foot process effacement in rats. CONCLUSIONS This study identified a novel pathway in which the IP3R-Grp75-VDAC1-MCU calcium regulation axis mediated podocyte apoptosis by facilitating mitochondrial Ca2+ overload. Antagonists that inhibit Ca2+ transfer from ER to mitochondria protected mouse podocytes from apoptosis. An MCU inhibitor protected podocytes and decreased proteinuria in rats with Adriamycin-induced nephropathy. Therefore, antagonists to this pathway have promise as novel podocyte-protective drugs.
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Affiliation(s)
- Han Xu
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
| | - Na Guan
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China.
| | - Ya-Li Ren
- Lab of Electron Microscope, Peking University First Hospital, Beijing, 100034, China
| | - Qi-Jiao Wei
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
| | - Ying-Hong Tao
- Experimental Animal Center, Peking University First Hospital, Beijing, 100034, China
| | - Guo-Sheng Yang
- Experimental Animal Center, Peking University First Hospital, Beijing, 100034, China
| | - Xiao-Ya Liu
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
| | - Ding-Fang Bu
- Central Laboratory, Peking University First Hospital, Beijing, 100034, China
| | - Ying Zhang
- Central Laboratory, Peking University First Hospital, Beijing, 100034, China
| | - Sai-Nan Zhu
- Department of Biostatistics, Peking University First Hospital, Beijing, 100034, China
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14
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Yu LJ, Jian XD, Zhang ZC, Ren YL, Ning Q, Wang K, Gao BJ, Jia JE. [Clinical analysis of lower limb thrombosis caused by paraquat poisoning]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2018; 36:58-60. [PMID: 29495185 DOI: 10.3760/cma.j.issn.1001-9391.2018.01.018] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the causes of peripheral vascular thrombosis in patients with paraquat poisoning. Methods: The patients with paraquat poisoning who were admitted to our department in recent two years were observed to screen out the patients with large vessel thrombosis. The data on toxic exposure history, clinical features, and treatment were collected to analyze the causes of thrombosis in the patients with paraquat poisoning. Results: Three patients had typical lower limb thrombosis. There was one case of right common femoral vein thrombosis, one case of bilateral calf muscle vein thrombosis, and one case of right calf superficial vein thrombosis and right calf muscle vein thrombosis. Conclusions: After paraquat poisoning, the blood is in a hypercoagulable state and prolonged bed rest may increase the risk of thrombosis.
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Affiliation(s)
- L J Yu
- Shandong university school of public health, Jinan 250014, China
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15
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Jiang P, Cui SP, Ren YL, Mao JZ, Liu HJ, Tian Y, Liu JY, Du J, Hou L, Zhang B. Girdin correlated with autophagy in invasive ductal breast carcinomas. Tumori 2018; 99:530-4. [DOI: 10.1177/030089161309900415] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Aims and background Increasing evidence claims that autophagy is essential for breast cancer progression. Girdin was found highly expressed in breast cancers. It has been reported that Girdin attenuates autophagy in HeLa cells. We explored the relationship between Girdin expression and autophagic patterns in breast cancer. Methods and study design In the study, Girdin expression and autophagic activity were investigated in a series of 99 invasive ductal breast carcinomas after immunohistochemical staining for the autophagy-associated proteins LC3-II and Girdin. Results The level of Girdin expression negatively correlated with LC3-II level, which represents autophagic activity (r = −0.289), and positively correlated with lymph node metastasis (r = 0.472). Girdin level was found no different in the “diffuse cytoplasmic” and “stone-like” patterns of LC3-II. Conclusions Up-regulated autophagy was negatively associated with Girdin level. There was a significant correlation between Girdin expression and lymph nodes metastasis in invasive ductal breast carcinoma.
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Affiliation(s)
- Ping Jiang
- The Key Laboratory of Geriatrics, Beijing Hospital & Beijing Institute of Geriatrics, Ministry of Health, No. 1, Dong Dan, Beijing
| | - Su-Ping Cui
- Department of Pathology, Peking University Health Science Center, Haidian District, Beijing
| | - Ya-Li Ren
- Laboratory of Electron Microscopy, Peking University First Hospital, Beijing, China
| | - Jing-Zhuo Mao
- Department of Pathology, Peking University Health Science Center, Haidian District, Beijing
| | - Hai-Jing Liu
- Department of Pathology, Peking University Health Science Center, Haidian District, Beijing
| | - Yuan Tian
- Department of Pathology, Peking University Health Science Center, Haidian District, Beijing
| | - Jian-Ying Liu
- Department of Pathology, Peking University Health Science Center, Haidian District, Beijing
| | - Juan Du
- Department of Pathology, Peking University Health Science Center, Haidian District, Beijing
| | - Lin Hou
- Department of Pathology, Peking University Health Science Center, Haidian District, Beijing
| | - Bo Zhang
- Department of Pathology, Peking University Health Science Center, Haidian District, Beijing
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16
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Wang H, Xu J, Zhang X, Ren YL, Cheng M, Guo ZL, Zhang JC, Cheng H, Xing GL, Wang SX, Yu F, Zhao MH. Tubular basement membrane immune complex deposition is associated with activity and progression of lupus nephritis: a large multicenter Chinese study. Lupus 2017; 27:545-555. [PMID: 28954590 DOI: 10.1177/0961203317732407] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- H Wang
- Laboratory of Electron Microscopy, Peking University First Hospital, Beijing, PR China
| | - J Xu
- Laboratory of Electron Microscopy, Peking University First Hospital, Beijing, PR China
| | - X Zhang
- Laboratory of Electron Microscopy, Peking University First Hospital, Beijing, PR China
| | - Y L Ren
- Laboratory of Electron Microscopy, Peking University First Hospital, Beijing, PR China
| | - M Cheng
- Laboratory of Electron Microscopy, Peking University First Hospital, Beijing, PR China
| | - Z L Guo
- The First Affiliated Hospital of Henan University of Science and Technology, Luoyang, PR China
| | - J C Zhang
- Jing Dong Yu Mei Kidney Disease Hospital, Beijing, PR China
| | - H Cheng
- Beijing Anzhen Hospital of Capital Medical University, Beijing, PR China
| | - G L Xing
- The First Affiliated Hospital of Zhengzhou University, Zhengzhou, PR China
| | - S X Wang
- Laboratory of Electron Microscopy, Peking University First Hospital, Beijing, PR China
| | - F Yu
- Renal Division, Department of Medicine, Peking University First Hospital; Institute of Nephrology, Peking University; Key Laboratory of Renal Disease, Ministry of Health of China; Key Laboratory of CKD Prevention and Treatment, Ministry of Education of China, Beijing, PR China
- Department of Nephrology, Peking University International Hospital, Beijing, PR China
| | - M H Zhao
- Renal Division, Department of Medicine, Peking University First Hospital; Institute of Nephrology, Peking University; Key Laboratory of Renal Disease, Ministry of Health of China; Key Laboratory of CKD Prevention and Treatment, Ministry of Education of China, Beijing, PR China
- Peking-Tsinghua Center for Life Sciences, Beijing, PR China
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17
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Ye Y, Zhang Q, Ren YL, Li JM. [A preliminary discussion on the contents and value of All Diseases(1), the medical bamboo slips unearthed from Han tomb in Laoguanshan of Chengdu]. Zhonghua Yi Shi Za Zhi 2017; 47:165-168. [PMID: 28810348 DOI: 10.3760/cma.j.issn.0255-7053.2017.03.007] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Among the medical bamboo slips unearthed from Han tomb in Laoguanshan of Chengdu, the Zhu bing (All Diseases) is a monograph to discuss the characteristics of signs and symptoms. Based on the differences of writing styles, diseases involved, expounding methods and writing rules, the book is divided, by the research team, into 2 parts: All Diseases(1) and All Diseases(2). All Diseases(1) includes over 130 slips, 2 000 characters with totally more than 100 disease names, containing multiple clinical disciplines. The elaborated classification, varied naming methods, grasping the symptom characteristics guided by the four diagnostic approaches, paying attention to the comparison of similar diseases, and dealing with the prognosis and healthcare in this part reflect the holism of correspondence between human body and natural environment, and syndrome differentiation thought of combining disease with symptoms and signs, revealing its academic significance.
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Affiliation(s)
| | | | - Y L Ren
- College of Sinology, Chengdu University of Traditional Chinese Medicine, Chengdu, 610075, China
| | - J M Li
- College of Sinology, Chengdu University of Traditional Chinese Medicine, Chengdu, 610075, China
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18
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Ren YL, Liang FR, Li JM, Chen ZH, Wang YT, Yang MX, He ZZ. [A preliminary discussion on the contents and value of Shi er mai (Twelve Channels) and Bie mai (Allo-channels), the medical bamboo slips unearthed from Han tomb in Laoguanshan of Chengdu]. Zhonghua Yi Shi Za Zhi 2017; 47:37-40. [PMID: 28316207 DOI: 10.3760/cma.j.issn.0255-7053.2017.01.007] [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] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The 52 medical bamboo slips entitled Si er ma (Twelve Channels) and Bie mai (Allo-channels) , unearthed from Han tomb in Laoguanshan, are the exclusive medical books concerning channels. Shi er mai is the first work bearing the term " heart dominating channel" , and the running pathways and manifestations of 12 channels. This book could be the major original sources of the 12-channel theories described in the Chapter of Jing mai (Channels) of Ling shu (Miraculous Pivot) . While Bie mai suggests the coexistence of the multi-channel systems at the time when the book was compiled and, together with the 12 "channel" , and 3 "branched collaterals" , these 2 books represent the original condition before the establishment of the mode of channel circulation in Ling shu, and is significant to explore the nature and origin of channel.
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Affiliation(s)
- Y L Ren
- Chengdu University of Traditional Chinese Medicine, Chengdu, 610075, China
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Ren YL, Liang FR, Li JM, Chen ZH, Yang MX, Xie J, He YG, Fu AJ. [A preliminary evaluation and discussion on the significance of the medical bamboo slips Ci shu ( Needling Methods) unearthed from a Han tomb in the Mount. Laoguan, Chengdu]. Zhonghua Yi Shi Za Zhi 2016; 46:355-358. [PMID: 28103983 DOI: 10.3760/cma.j.issn.0255-7053.2016.06.007] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The compilation of medical bamboo slips, Ci shu(Needling Methods), which was unearthed from a Han tomb in Mt. Laoguan, is a monograph dealing exclusively with the principles of clinical acupuncture manipulations with 40 acupuncture prescriptions, being the earliest unearthed work with documented standard methods of acupuncture manipulations and acupuncture prescriptions in China. The chapter Zhen fang (Acupuncture Prescriptions) is the earliest summary of standardized acupoint prescriptions up to now in China, which is of great significance to clinical practice directly derived from ancient clinical performance of acupuncture. The chapter Zhen fang of the book Ci shu is also one of the earliest ancient clinical reports archiving the acupoint. This may provide invaluable perspectives to the study of the conceptualization, origination, development, formation of theoretical system, and clinical application of acupoints.
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Affiliation(s)
- Y L Ren
- Chengdu University of Traditional Chinese Medicine, Chengdu, 610075, China
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20
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Li JM, Ren YL, Wang YT, Xie T, Ye Y. [Discussion on the species and naming of medical bamboo slips unearthed from Han tomb in Laoguanshan]. Zhonghua Yi Shi Za Zhi 2016; 46:303-306. [PMID: 28104006 DOI: 10.3760/cma.j.issn.0255-7053.2016.05.010] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
920 pieces of bamboo slip, including broken bamboo slips, found in Laoguanshan Han tomb, are placed in two locations. In one of the location, 736 pieces, except 20 pieces of " chi jian" , of medical bamboo slips are stored. The Chengdu Municipal Institute of Archaeology and Cultural Relics Protection Center of Jingzhou preliminary sorted out these pieces and tentatively give them the names: Wu se mai zang lun, Bi xi yi lun, Mai si hou, Liu shi bing fang, Bing yuan lun, Zhu bing zheng hou, Jing mai shu, Gui mai shu. Through our comprehensive reading, font comparison, comparison of the contents, and investigation on the texts, it was suggested that the batch of medical slips might be divided into nine kinds of documents, namely, Bi xi zhen fa, Zhen zhi lun, Liu shi bing fang, Zhu bing yi, Zhu bing er, Shi er mai, Bie mai, Ci shu, Ni shun wu se mai zang yan jing shen.
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Affiliation(s)
- J M Li
- Institute of Sinology, Chengdu University of Traditional Chinese Medicine, Chengdu, 610075
| | - Y L Ren
- Institute of Sinology, Chengdu University of Traditional Chinese Medicine, Chengdu, 610075
| | - Y T Wang
- School of Basic Medical Science, Chengdu University of Traditional Chinese Medicine, Chengdu, 610075
| | - T Xie
- Chengdu Municipal Institute of Cultural Relics and Archaeology, Chengdu, 610072, China
| | - Y Ye
- School of Basic Medical Science, Chengdu University of Traditional Chinese Medicine, Chengdu, 610075
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Jiang P, Ren YL, Li JL, Luo J. Girdin expression in cervical carcinoma and its role in the malignant properties of HeLa cells. Oncol Lett 2016; 11:2440-2444. [PMID: 27073494 DOI: 10.3892/ol.2016.4250] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [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: 05/26/2014] [Accepted: 05/20/2015] [Indexed: 11/05/2022] Open
Abstract
Cervical cancer is a major cause of mortality in females worldwide, with the majority of cases reported in developing countries. The molecular mechanisms of this disease are unclear. However, increasing evidence indicates that the expression or overexpression of Girdin is associated with a poor prognosis in a variety of cancer types. Therefore, the aim of the current study was to evaluate the potential association between Girdin expression, and malignant properties of cervical cancer lesions and HeLa cells. Girdin protein expression was examined in 87 samples of cervical squamous cell lesions, including intraepithelial neoplasia (grades I and III) and invasive carcinoma, using immunohistochemical (IHC) staining. A short-hairpin RNA (shRNA) approach was employed to specifically suppress the expression of Girdin mRNA in HeLa cells in vitro, allowing the role of Girdin in a number of malignant properties to be evaluated. Girdin protein was observed in the cytoplasm of 79/87 (90.8%) cervical cancer lesion specimens. However, no positive Girdin signals were identified in healthy cervical squamous epithelium samples. Furthermore, a significant correlation between Girdin expression and lesion grade was identified (Spearman's correlation coefficient, 0.566; P<0.001). When Girdin was suppressed by Girdin shRNA, the rate of HeLa cell growth was significantly reduced in vitro (P<0.05). Additional analysis determined that Girdin was associated with serum-deprived induced HeLa apoptosis. Thus, patients with high-grade cervical cancer tumors exhibited a strong expression for Girdin, and Girdin appears to key in HeLa cell proliferation and serum-deprived induced apoptosis, supporting the hypothesis that Girdin may be important in the process of cervical carcinogenesis.
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Affiliation(s)
- Ping Jiang
- The Key Laboratory of Geriatrics, Beijing Hospital and Beijing Institute of Geriatrics, Ministry of Health, Beijing 100730, P.R. China
| | - Ya-Li Ren
- Laboratory of Electron Microscopy, Peking University First Hospital, Beijing 100034, P.R. China
| | - Jia-Liang Li
- Clinical Laboratory, Fuda Cancer Hospital, Guangzhou, Guangdong 510665, P.R. China
| | - Jun Luo
- The Key Laboratory of Geriatrics, Beijing Hospital and Beijing Institute of Geriatrics, Ministry of Health, Beijing 100730, P.R. China
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Ren YL, Zhan Y, Lu L, Li SL, Fu X, Yu GY, Cao T, Liu H. [Expression characteristics of epithelial markers in human embryonic stem cells differentiating into keratinocytes]. Beijing Da Xue Xue Bao Yi Xue Ban 2015; 47:305-311. [PMID: 25882950] [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: 06/04/2023]
Abstract
OBJECTIVE To differentiate human embryonic stem cells (hESCs) into keratinocytes (K-hESCs) and analyse the expression characteristics of biomarkers of K-hESCs. METHODS The hESCs of line H9 were seeded on matrigel in mTeSR1 medium. The hESCs were directly differentiated into keratinocytes in epithelial differentiation medium with bone morphogenetic protein 4, retinoic acid and N2 supplement. The karyotype of K-hESCs was analyzed, comparing the gene expression differences of K-hESCs with human gingival epithelial cells (HGECs), human immortalized oral epithelial cells (HIOECs) and HaCaT by Real-time PCR. Molecular characteristics of the cell differentiation were observed throughout the process by immunocytochemical techniques. RESULTS H9-hESCs were successfully differentiated into the cells that exhibited characteristics of keratinocytes in epithelial differentiation medium. The karyotype of K-hESCs was 46, XX; and the keratinocyte gene p63 expression in K-hESCs was significantly lower than that in HaCaT (P < 0.05), but there was no significant difference of p63 expression in K-hESCs, comparing with that in HGECs and HIOECs (P > 0.05). CONCLUSION H9-hESCs could be directly differentiated into K-hESCs. The gene expression of K-hESCs was similar to that of epithelial cells in the early stage of monolayer cells differentiation with high proliferative activity.
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Affiliation(s)
- Y L Ren
- Department of Pediatric Dentistry, Peking University School and Hospital of Stomatology, Beijing 100081, China
| | - Y Zhan
- Department of Pediatric Dentistry, Peking University School and Hospital of Stomatology, Beijing 100081, China
| | - L Lu
- Department of Oral and Maxillary Surgery, Peking University School and Hospital of Stomatology, Beijing 100081, China
| | - S L Li
- Department of Oral and Maxillary Surgery, Peking University School and Hospital of Stomatology, Beijing 100081, China
| | - X Fu
- Research Center of Plastic Surgery Hospital, Chinese Academy of Medical Science & Peking Union Medical College, Beijing 100144, China
| | - G Y Yu
- Department of Oral and Maxillary Surgery, Peking University School and Hospital of Stomatology, Beijing 100081, China
| | - T Cao
- Faculty of Dentistry, National University of Singapore, Singapore 117510, Singapore
| | - H Liu
- Department of Pediatric Dentistry, Peking University School and Hospital of Stomatology, Beijing 100081, China
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Guan N, Ren YL, Liu XY, Zhang Y, Pei P, Zhu SN, Fan Q. Protective role of cyclosporine A and minocycline on mitochondrial disequilibrium-related podocyte injury and proteinuria occurrence induced by adriamycin. Nephrol Dial Transplant 2015; 30:957-69. [DOI: 10.1093/ndt/gfv015] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Accepted: 12/11/2014] [Indexed: 11/14/2022] Open
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Jiang P, Ren YL, Lan Y, Li JL, Luo J, Li J, Cai JP. Phagocytosis of platelets enhances endothelial cell survival under serum deprivation. Exp Biol Med (Maywood) 2015; 240:876-83. [PMID: 25577801 DOI: 10.1177/1535370214565076] [Citation(s) in RCA: 18] [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] [Subscribe] [Scholar Register] [Received: 07/03/2014] [Accepted: 11/12/2014] [Indexed: 11/16/2022] Open
Abstract
Platelets are key players in fundamental processes of vascular biology, such as angiogenesis, tissue regeneration, and tumor metastasis. However, the underlying mechanisms remain unclear. In this study, some tumor vascular endothelial cells were positively stained by antiplatelet antibodies. Further investigation revealed that platelets were taken up by endothelial cells in vitro and in vivo. Human umbilical vascular endothelial cells were rendered apoptotic under conditions of serum deprivation. However, endothelial apoptosis was suppressed and cell viability was enhanced when platelets were added to the cultures. Endothelial survival was paralleled by an upregulation of phosphorylated Akt and p70 S6K. In conclusion, this study demonstrated that platelets can be phagocytosed by endothelial cells, and the phagocytosed platelets could suppress endothelial apoptosis and promote cell viability level. The mechanism underlying this process involves the activation of Akt signaling.
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Affiliation(s)
- Ping Jiang
- The Key Laboratory of Geriatrics, Beijing Hospital & Beijing Institute of Geriatrics, Ministry of Health, Beijing 100730, China
| | - Ya-Li Ren
- Laboratory of Electron Microscopy, Peking University First Hospital, Beijing 100034, China
| | - Yong Lan
- Department of Vascular Surgery, Beijing Hospital, Ministry of Health, Beijing 100730, China
| | - Jia-Liang Li
- Clinical Laboratory, Guangzhou Fuda Cancer Hospital, Guangzhou 510665, China
| | - Jun Luo
- The Key Laboratory of Geriatrics, Beijing Hospital & Beijing Institute of Geriatrics, Ministry of Health, Beijing 100730, China
| | - Jian Li
- The Key Laboratory of Geriatrics, Beijing Hospital & Beijing Institute of Geriatrics, Ministry of Health, Beijing 100730, China
| | - Jian-Ping Cai
- The Key Laboratory of Geriatrics, Beijing Hospital & Beijing Institute of Geriatrics, Ministry of Health, Beijing 100730, China
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Jiang P, Lan Y, Luo J, Ren YL, Liu DG, Pang JX, Liu J, Li J, Wang C, Cai JP. Rapamycin promoted thrombosis and platelet adhesion to endothelial cells by inducing membrane remodeling. BMC Cell Biol 2014; 15:7. [PMID: 24564184 PMCID: PMC3936831 DOI: 10.1186/1471-2121-15-7] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2013] [Accepted: 02/06/2014] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND Recently, evidence indicated that the rapamycin-eluting stent which was used worldwide may contribute to an increased risk for thrombosis. On the contrary, other researchers found it was safe. Thus, it is necessary to clarify the effect of rapamycin on thrombosis and the corresponding mechanisms. RESULTS The effects of rapamycin in vivo were evaluated by modified deep vein thrombosis animal model. The platelets were from healthy volunteers and the platelet-endothelium (purchased from ATCC) adhesion in cultured endothelial cells was assessed. Membrane rufflings in endothelial cells were examined by confocal and electron microscope. Thrombus formation increased in rats that were injected with rapamycin. Electron microscope analysis exhibited microvilli on the rapamycin-treated endothelium in rats. Rapamycin enhanced membrane ruffling in human umbilical vein endothelial cells (HUVECs) and adhesion of platelets to HUVECs. The platelet-HUVECs adhesion was attenuated when cells were treated with cytochalacin B. Inhibition of autophagy by 3-methyladenine led to suppression of membrane ruffles in HUVECs and augmentation of platelet-endothelial adhesion. CONCLUSIONS In conclusion, we found that endothelial membrane remodeling induced by rapamycin is crucial for the adhesion of platelets to endothelial cells and thereby for thrombosis in vivo, and that the endothelial membrane remodeling is autophagy dependent.
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Affiliation(s)
- Ping Jiang
- The Key Laboratory of Geriatrics, Beijing Hospital and Beijing Institute of Geriatrics, Ministry of Health, No,1, DaHua Road, Dong Dan, Beijing 100730, P,R,China.
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Jiang P, Cui SP, Ren YL, Mao JZ, Liu HJ, Tian Y, Liu JY, Du J, Hou L, Zhang B. Girdin correlated with autophagy in invasive ductal breast carcinomas. Tumori 2014. [PMID: 24326843 DOI: 10.1700/1361.15106] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
AIMS AND BACKGROUND Increasing evidence claims that autophagy is essential for breast cancer progression. Girdin was found highly expressed in breast cancers. It has been reported that Girdin attenuates autophagy in HeLa cells. We explored the relationship between Girdin expression and autophagic patterns in breast cancer. METHODS AND STUDY DESIGN In the study, Girdin expression and autophagic activity were investigated in a series of 99 invasive ductal breast carcinomas after immunohistochemical staining for the autophagy-associated proteins LC3-II and Girdin. RESULTS The level of Girdin expression negatively correlated with LC3-II level, which represents autophagic activity (r = -0.289), and positively correlated with lymph node metastasis (r = 0.472). Girdin level was found no different in the "diffuse cytoplasmic" and "stone-like" patterns of LC3-II. CONCLUSIONS Up-regulated autophagy was negatively associated with Girdin level. There was a significant correlation between Girdin expression and lymph nodes metastasis in invasive ductal breast carcinoma.
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Ren YL, Nong L, Zhang S, Zhao J, Zhang XM, Li T. Analysis of 142 Northern Chinese patients with peripheral T/NK-Cell lymphomas: subtype distribution, clinicopathologic features, and prognosis. Am J Clin Pathol 2012; 138:435-47. [PMID: 22912362 DOI: 10.1309/ajcpwkj3gpfrt7ga] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Peripheral T- and natural killer (NK)-cell lymphomas (PTNKLs) are a heterogeneous group of lymphoid malignancies. We reclassified 142 cases and investigated their clinicopathologic features and outcome. Results showed that the most prevalent subtypes were extranodal NK/T-cell lymphoma, nasal type (eNK/T) (38.0%); angioimmunoblastic T-cell lymphoma (16.9%); and peripheral T-cell lymphoma, not otherwise specified (16.2%). Follow-up was available in 124 patients whose overall survival ranged from 3 days to 134 months, with a median of 11 months. Multivariate analysis demonstrated that thrombocytopenia (P = .001), elevated lactate dehydrogenase (P = .007), high Ki-67 index (P = .002), and T-bet expression in more than 20% of cells (P = .036) were independent factors for all cases-among which only the factor of T-bet indicated good outcome-and that thrombocytopenia (P = .011) and radiotherapy (P = .026) were significant for the eNK/T group. Thus, eNK/T was the commonest subtype in this series. The significance of T-bet in predicting outcome should be further confirmed.
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Mao JZ, Jiang P, Cui SP, Ren YL, Zhao J, Yin XH, Enomoto A, Liu HJ, Hou L, Takahashi M, Zhang B. Girdin locates in centrosome and midbody and plays an important role in cell division. Cancer Sci 2012; 103:1780-7. [PMID: 22755556 DOI: 10.1111/j.1349-7006.2012.02378.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2011] [Revised: 06/21/2012] [Accepted: 07/01/2012] [Indexed: 12/17/2022] Open
Abstract
Girdin is a downstream effector of epidermal growth factor receptor (EGFR)-AKT and interacts with actin and microtubule. Increasing evidence confirmed that Girdin played an important role in cell migration. Here we report that Girdin also regulates cell division. Overexpression or suppression of Girdin leads to attenuated cell proliferation. Imaging of mitotic cells revealed that Girdin is located in the cell division apparatus such as centrosome and midbody. The sub-cellular localization of Girdin was dependent on the domains, which interacted with actin or microtubules. Overexpression of Girdin lead to increased centrosome splitting and amplification. In addition, data show that pAKT also locates in both the centrosome and midbody, indicating the regulating role of AKT in Girdin-mediated cell division. To elucidate the effect of Girdin on tumor growth in vivo, HeLa cells infected with retrovirus harboring either control or Girdin shRNAs were injected subcutaneously into the immunocompromised nude mice. Downregulation of Girdin by shRNA markedly inhibited the cell growth of subcutaneously transplanted tumors in nude mice. These data demonstrate that Girdin is important for efficient cell division. Taking our previous data into consideration, we speculate that Girdin regulates both cell division and cell migration through cytoskeletal molecules.
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Affiliation(s)
- Jing-Zhuo Mao
- Department of Pathology, Peking University Health Science Center, Beijing, China
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Chang BV, Yuan SY, Ren YL. Aerobic degradation of tetrabromobisphenol-A by microbes in river sediment. Chemosphere 2012; 87:535-541. [PMID: 22245059 DOI: 10.1016/j.chemosphere.2011.12.057] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2011] [Revised: 12/21/2011] [Accepted: 12/22/2011] [Indexed: 05/31/2023]
Abstract
This study investigated the aerobic degradation of tetrabromobisphenol-A (TBBPA) and changes in the microbial community in river sediment from southern Taiwan. Aerobic degradation rate constants (k(1)) and half-lives (t(1/2)) for TBBPA (50 μg g(-1)) ranged from 0.053 to 0.077 d(-1) and 9.0 to 13.1 d, respectively. The degradation of TBBPA (50 μg g(-1)) was enhanced by adding yeast extract (5 mg L(-1)), sodium chloride (10 ppt), cellulose (0.96 mg L(-1)), humic acid (0.5 g L(-1)), brij 30 (55 μM), brij 35 (91 μM), rhamnolipid (130 mg L(-1)), or surfactin (43 mg L(-1)), with rhamnolipid yielding a higher TBBPA degradation than the other additives. For different toxic chemicals in the sediment, the results showed the high-to-low order of degradation rates were bisphenol-A (BPA) (50 μg g(-1))>nonylphenol (NP) (50 μg g(-1))>4,4'-dibrominated diphenyl ether (BDE-15) (50 μg g(-1))>TBBPA (50 μg g(-1))>2,2',3,3',4,4',5,5',6,6'-decabromodiphenyl ether (BDE-209) (50 μg g(-1)). The addition of various treatments changed the microbial community in river sediments. The results also showed that Bacillus pumilus and Rhodococcus ruber were the dominant bacteria in the process of TBBPA degradation in the river sediments.
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Affiliation(s)
- B V Chang
- Department of Microbiology, Soochow University, Taipei, Taiwan.
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Ling Y, Jiang P, Cui SP, Ren YL, Zhu SN, Yang JP, Du J, Zhang Y, Liu JY, Zhang B. Clinical implications for girdin protein expression in breast cancer. Cancer Invest 2011; 29:405-10. [PMID: 21649466 DOI: 10.3109/07357907.2011.568568] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Girdin is highly expressed in breast carcinomas. Suppression of Girdin inhibited breast cancer cell migration. However, the clinical implications of Girdin as a marker are still unclear. Here we examined 80 breast cancer specimens using immunohistochemistry. Overall, positive Girdin staining was 41.25% in all of the cases. Girdin was strongly expressed in tumors of CerbB2-positive breast cancers (p < .05). Cases with both CerbB2- and Girdin-positive expression had a higher histological grade than the others. These findings indicated the closed relationship between breast cancer progression and Girdin expression. Girdin together with CerbB2 might be a new potential marker for breast cancers.
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Affiliation(s)
- Yun Ling
- Department of Pathology, Health Science Center of Peking University, Haidian District, Beijing, China
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Ren YL, Tang XY, Li T. Ewing sarcoma-primitive neuroectodermal tumor of the uterus: a clinicopathologic, immunohistochemical and ultrastructural study of one case. Arch Gynecol Obstet 2010; 283:1139-43. [PMID: 20589387 DOI: 10.1007/s00404-010-1557-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2010] [Accepted: 06/03/2010] [Indexed: 12/23/2022]
Abstract
INTRODUCTION Ewing sarcoma-primitive neuroectodermal tumors (ES/PNET) constitute a family of neoplasms characterized by a continuum of neuroectodermal differentiation. ES/PNET of the uterus is rare. There are 43 cases published in the English literature as far as we know. We describe an additional case. CASE REPORT A 56-year-old woman presented with a 2-month history of irregular menopausal vaginal bleeding. After surgical excision, microscopic, immunohistochemical and electron microscopic examination suggested the diagnosis of ES/PNET. The patient underwent combined chemotherapy consisting of ifosfamide, etoposide, and cisplatin. She was alive with no evidence of recurrence or metastasis after 41 months of the initial operation. DISCUSSION In spite of the rarity of ES/PNET, we should consider it in the differential diagnosis of small cell neoplasms of the uterus.
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Affiliation(s)
- Ya-Li Ren
- Laboratory of Electron Microscopy, Peking University First Hospital, Beijing 100034, People's Republic of China.
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Ren Y, Xie Y, Chai L, Wang S, Cheng M. Autophagy modification augmented the treatment effects initiated by arsenic trioxide in NB4 cells. Med Oncol 2010; 28:231-6. [DOI: 10.1007/s12032-010-9430-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2009] [Accepted: 01/14/2010] [Indexed: 02/07/2023]
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Zhou T, Li B, Peng C, Ji BP, Chen G, Ren YL. Assessment of the Sequential Simulated Gastrointestinal Tolerance of Lactic Acid Bacteria from Kefir Grains by Response Surface Methodology. J Food Sci 2009; 74:M328-34. [DOI: 10.1111/j.1750-3841.2009.01237.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [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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Dou Y, Qu N, Wang B, Chi YZ, Ren YL. Simultaneous determination of two active components in compound aspirin tablets using principal component artificial neural networks (PC-ANNs) on NIR spectroscopy. Eur J Pharm Sci 2007; 32:193-9. [PMID: 17714922 DOI: 10.1016/j.ejps.2007.07.002] [Citation(s) in RCA: 22] [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] [Subscribe] [Scholar Register] [Received: 04/03/2007] [Revised: 07/05/2007] [Accepted: 07/09/2007] [Indexed: 10/23/2022]
Abstract
A method for simultaneous, non-destructive analysis of aspirin and phenacetin in compound aspirin tablets with different concentrations has been developed by principal component artificial neural networks (PC-ANNs) on near-infrared (NIR) spectroscopy. In PC-ANNs models, the spectra data were first analyzed by principal component analysis (PCA). Then the scores of the principal compounds (PCs) were chosen as input nodes for input layer instead of the spectra data. The artificial neural networks (ANNs) models using the spectra data as input nodes were also established, which were compared with the PC-ANNs models. Four different preprocessing methods (first-derivation, second-derivation, standard normal variate (SNV) and multiplicative scatter correction (MSC)) were applied to NIR conventional spectra. The result shows the first-derivative model of PC-ANNs multivariate calibration has the lowest training errors and predicting errors. The concept of the degree of approximation was introduced and performed as the selective criterion of the optimum network parameters.
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Affiliation(s)
- Y Dou
- College of Science, Tianjin University of Science & Technology, Tianjin 300222, China
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Wang HY, Sun JM, Lu HF, Shi DR, Ou ZL, Ren YL, Fu SQ. Micrometastases detected by cytokeratin 19 expression in sentinel lymph nodes of patients with early-stage cervical cancer. Int J Gynecol Cancer 2006; 16:643-8. [PMID: 16681740 DOI: 10.1111/j.1525-1438.2006.00381.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [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: 11/29/2022] Open
Abstract
The purpose of this study was to detect micrometastases in sentinel lymph nodes (SLNs) by reverse transcriptase-polymerase chain reaction (RT-PCR) and immunohistochemistry (IHC) analyses for cytokeratin 19 (CK19) expression in early-stage cervical cancer. One hundred twenty-five SLNs were collected from 46 patients with early-stage cervical cancer. Conventional histopathologic techniques revealed 14 metastatic SLNs from 11 out of 46 patients. CK19 expression was detected by RT-PCR and IHC in all the 125 SLNs. Cervical cancer tissues from nine patients and five pelvic lymph nodes from the patients without tumor were utilized as positive and negative controls, respectively. All the metastastic SLNs on conventional histopathologic techniques were positive by either RT-PCR or IHC analyses, while all the positive controls were positive and all the negative controls were negative as expected. Of 35 patients without metastatic SLNs on conventional histopathologic techniques, the detection rate of micrometastases was 42.85% by RT-PCR and 20% by IHC analyses. RT-PCR and IHC were more sensitive to identify micrometastases in SLNs of patients with early-stage cervical cancer than routine pathology. These findings demonstrated that micrometastasis could be identified by molecular technique such as RT-PCR and IHC analyses for CK19 expression. RT-PCR was more sensitive to detect micrometastases in SLNs than IHC in patients with early-stage cervical cancer. Therefore, molecular assessment of the SLNs may be a valuable tool to complement routine histologic examination of cervical cancer. The importance of micrometastases in SLNs is under close clinical observation to determine whether it can be used as a predicting factor to help us make decision whether to proceed with whole-pelvic lymph node dissection or as a prognostic factor for clinical outcome.
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Affiliation(s)
- H Y Wang
- Departments of Gynecological Oncology and Pathology, Cancer Hospital, Fudan University, Shanghai, China.
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Li CT, Shi CH, Wu JG, Xu HM, Zhang HZ, Ren YL. Methods of developing core collections based on the predicted genotypic value of rice ( Oryza sativa L.). Theor Appl Genet 2004; 108:1172-1176. [PMID: 15067404 DOI: 10.1007/s00122-003-1536-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2003] [Accepted: 11/10/2003] [Indexed: 05/24/2023]
Abstract
The selection of an appropriate sampling strategy and a clustering method is important in the construction of core collections based on predicted genotypic values in order to retain the greatest degree of genetic diversity of the initial collection. In this study, methods of developing rice core collections were evaluated based on the predicted genotypic values for 992 rice varieties with 13 quantitative traits. The genotypic values of the traits were predicted by the adjusted unbiased prediction (AUP) method. Based on the predicted genotypic values, Mahalanobis distances were calculated and employed to measure the genetic similarities among the rice varieties. Six hierarchical clustering methods, including the single linkage, median linkage, centroid, unweighted pair-group average, weighted pair-group average and flexible-beta methods, were combined with random, preferred and deviation sampling to develop 18 core collections of rice germplasm. The results show that the deviation sampling strategy in combination with the unweighted pair-group average method of hierarchical clustering retains the greatest degree of genetic diversities of the initial collection. The core collections sampled using predicted genotypic values had more genetic diversity than those based on phenotypic values.
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Affiliation(s)
- C T Li
- Department of Agronomy, College of Agriculture and Biotechnology, Zheijang University, 310029, Hangzhou, China
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Cen XN, Zhu P, Shi YJ, Ren YL, Ma MX, Yu JR. [Cytokine-induced killer cells induce apoptosis of K562 cells expressed bcr-abl]. Zhongguo Shi Yan Xue Ye Xue Za Zhi 2002; 10:201-4. [PMID: 12513785] [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: 02/28/2023]
Abstract
In order to investigate whether cytokine-induced killer (CIK) cells can induce apoptosis of bcr-abl(+) K562 cells, apoptosis of K562 cells and CEM cells induced by CIK cells, etoposide or camptothecin was detected with flow cytometry DNA assay. RT-PCR showed that K562 cells expressed the bcr-abl fusion gene, K 562 cells, K562 cells/etoposide or K562 cells/camptothecin groups showed no sub-G(1) peak. K562 cells/CIK cells group showed sub-G(1) peak (38.1%). CEM cells showed no sub-G(1) peak. CEM cells/camptothecin or CEM cells/etoposide groups showed sub-G(1) peak (23.5% or 32.3% respectively). CEM cells/CIK cells group showed sub-G(1) peak (45.4%). Etoposide or camptothecin did not induce apoptosis of K562 cells. CIK cells induce apoptosis of K562 cells. Bcr-abl fusion gene prevented apoptosis induced by etoposide or camptothecin, but did not prevent apoptosis induced by CIK cells. This property may support the observed adoptive immunologic effect of allogeneic bone marrow transplantation and donor lymphocyte transfusions of CML case relapsing after allogeneic bone marrow transplantation.
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Affiliation(s)
- Xi-Nan Cen
- Department of Hematology, The First Hospital, Peking University, Beijing 100034, China.
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Ren YL, Zhu P. [Progress of chimerism research after allo-bone marrow transplantation]. Zhongguo Shi Yan Xue Ye Xue Za Zhi 2002; 10:168-72. [PMID: 12513824] [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: 02/28/2023]
Abstract
Bone marrow transplantation (BMT) is an effective therapy for a variety of hematologic and immunodeficient diseases. Two possible situations of chimerism can be encountered when assessing the hematological status in recipient post-allo-BMT: 1. complete chimerism, where the marrow and circulating blood cells all are donor origin; 2. mixed chimerism, the cell components in recipient are both donor and recipient origins. Formation of the different kinds of chimerism are influenced by some factors, included the amount of infused hematopoietic stem cells, the ratio of T cells from donor and recipient, conditioning regimen and patient's condition. The clinical significance was different for the forms and development of chimerism. There are several detecting methods for chimerism, such as microsatellite assay, karyotyping of chromosome, conversion of blood group, red blood cell antigen, restriction fragment length polymorphism, variable number of tandem repeat, and PCR. Above-mentioned aspects of chimerism research were reviewed.
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Affiliation(s)
- Ya-Li Ren
- Department of Hematology, The First Hospital of Peking University, Beijing 100034, China
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Abstract
BACKGROUND There is evidence that macula densa nitric oxide (NO) inhibits tubuloglomerular feedback (TGF). However, TGF response is not altered in mice deficient in neuronal nitric oxide synthase (nNOS) (-/-). Furthermore, nNOS expression in the macula densa is inversely related to salt intake, yet micropuncture studies have shown that NOS inhibition potentiates TGF in rats on high sodium intake but not in rats on a low-salt diet. These inconsistencies may be due to confounding systemic factors, such as changes in circulating renin. To further clarify the role of macula densa nNOS in TGF response, independent of systemic factors, we tested the hypothesis that (1) TGF response is inversely related to sodium intake, and (2) during low sodium intake, NO produced by macula densa nNOS tonically controls the basal diameter of the afferent arteriole (Af-Art). METHODS Af-Arts and attached macula densas were simultaneously microperfused in vitro. TGF response was determined by measuring Af-Art diameter before and after increasing NaCl in the macula densa perfusate. TGF response was studied in wild-type (+/+) and nNOS knockout mice (-/-), as well as in juxtaglomerular apparatuses (JGAs) from rabbits fed a low-, normal-, or high-NaCl diet. RESULTS TGF responses were similar in nNOS +/+ and -/- mice. However, in nNOS +/+ mice, 7-nitroindazole (7-NI) perfused into the macula densa significantly potentiated the TGF response (P = 0.001), while in nNOS -/- mice, this potentiation was absent. In rabbits on three different sodium diets, TGF responses were similar and were potentiated equally by 7-NI. However, in JGAs from rabbits on a low-NaCl diet, adding 7-NI to the macula densa while perfusing it with low-NaCl fluid caused Af-Art vasoconstriction, decreasing the diameter by 14% (from 21.7 +/- 1.3 to 18.6 +/- 1.5 microm; P < 0.001). This effect was not observed in JGAs from rabbits fed a normal- (19.0 +/- 0.5 vs. 19.3 +/- 0.8 microm after 7-NI) or high-NaCl diet (18.6 +/- 0.7 vs. 18.4 +/- 0.7 microm). CONCLUSIONS First, in this in vitro preparation, chronic changes in macula densa nNOS do not play a major role in the regulation of TGF. Compensatory mechanisms may develop during chronic alteration of nNOS that keep TGF relatively constant. Second, nNOS regulates TGF response acutely. Third, the results obtained in the +/+ and -/- mice also confirm that the effect of 7-NI is due to inhibition of macula densa nNOS. Finally, during low sodium intake (without induction of TGF), the regulation of basal Af-Art resistance by macula densa nNOS suggests that NO in the macula densa helps maintain renal blood flow during the high renin secretion caused by low sodium intake.
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Affiliation(s)
- Y L Ren
- Department of Internal Medicine, Hypertension and Vascular Research Division, Henry Ford Hospital, 2799 West Grand Boulevard, Detroit, MI 48202, USA
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Ren YL, Yang JS. [Study on chemical constituents of Hemistepta lyrata Bunge]. Yao Xue Xue Bao 2001; 36:746-9. [PMID: 12579973] [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: 02/28/2023]
Abstract
AIM To separate and identify the chemical constituents of the whole plant of Hemistepta lyrata Bunge. METHODS Compounds wese separated with chromatography and their chemical strucrures were elucidated with UV, IR, EIMS, FABMS, ESIMS, 1HNMR, 13CNMR HMQC and HMBC spectral methods. RESULTS Five compounds were isolated from the plant. They were identified as apigenin I, apigenin-7-O-beta-D-lutinoside II, acacetin-7-O-beta-D-lutinoside III, astragalin IV, hemislienoside V. CONCLUSION These compounds were isolated from this plant for the first time, and compound V is a new one.
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Affiliation(s)
- Y L Ren
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100094, China
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Ren YL, Yang JS. [Studies on chemical constituents from Chinese medicinal plant Hemistepta lyrata Bunge]. Zhongguo Zhong Yao Za Zhi 2001; 26:405-6. [PMID: 12528508] [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: 02/28/2023]
Abstract
OBJECTIVE To separate and identify the chemical constituents of the whole plant. METHOD The compounds were extracted with solvents, isolated by column chromatography and identified by spectroscopic methods, such as IR, MS and 1H NMR. RESULT Five compounds were identified as hentriantane I, taraxasteryl acetate II, taraxasterol III, beta-sitosterol IV, and stigmasterol V. CONCLUSION The compounds III and V were obtained from the plant for the first time.
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Affiliation(s)
- Y L Ren
- Institute of Medicinal Plants, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100094, China
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Ren YL. Comparison of solvent extraction and microwave extraction for release of dimethyl sulfide from cereals and canola. J Agric Food Chem 2001; 49:1737-1739. [PMID: 11308319 DOI: 10.1021/jf0010634] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Natural levels of dimethyl sulfide (DMS) in newly harvested wheat, barley, paddy, and canola were determined by gas chromatography using a flame photometric detector in sulfur mode. The two methods involved determination of DMS in the headspace of cereal or oilseed samples (1) after extraction with microwaves and (2) after a traditional approach using 25% KBr solution. Quantitative results from each method were similar, and therefore both methods are suitable for the determination of DMS in grains and oilseeds. However, the microwave procedure has several advantages; for example, results are obtained very quickly, and only a small amount of sample is required.
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Affiliation(s)
- Y L Ren
- CSIRO Entomology, G.P.O. Box 1700, Canberra, ACT 2601, Australia.
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Abstract
Natural levels of dimethyl sulfide (DMS) in rough rice and its products (polished rice, brown rice, and broken rice) were determined by a gas chromatograph equipped with a flame photometric detector and sulfur mode, after extraction with 25% KBr solution in a sealed system. DMS was found to occur naturally in nine newly harvested and stored Australian varieties of rough rice and its products and decreased during storage after harvesting. Natural levels of DMS in rough rice and its products varied with variety, fraction, and period of storage. The order of levels of DMS was rough rice = brown rice > polished rice = broken rice. The range of values was 0.002-30 mg kg(-1) (ppm, w/w).
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Affiliation(s)
- Y L Ren
- CSIRO Entomology, G.P.O. Box 1700, Canberra, ACT 2601, Australia.
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Abstract
BACKGROUND Previous studies have suggested that nitric oxide (NO) produced within cells of the macula densa (MD) modulates tubuloglomerular feedback (TGF). We tested the hypothesis that NO produced in the MD acts locally as an autacoid to activate soluble guanylate cyclase and cGMP-dependent protein kinase in the MD itself. METHODS Rabbit afferent arterioles (Af-Arts) and attached MD were simultaneously microperfused in vitro. The TGF response was determined by measuring the Af-Art diameter before and after increasing NaCl in the MD perfusate (from 17 mmol/L of Na and 2 of Cl to 65 mmol/L of Na and 50 of Cl). TGF was studied before (control TGF) and after inhibiting components of the NO-cGMP-dependent cascade in the tubular or vascular compartment. RESULTS Increasing NaCl concentration in the MD perfusate decreased the Af-Art diameter by 3.2 +/- 0.5 microm (from 18.5 +/- 1.3 to 15.4 +/- 1.3 microm, P < 0.001). Adding a soluble guanylate cyclase inhibitor (LY83583) to the MD increased TGF response to 6.3 +/- 1.1 microm (P < 0.031 vs. control TGF). Similarly, when cGMP-dependent protein kinase was inhibited with KT5823, TGF was augmented from 2.6 +/- 0.3 to 4.0 +/- 0.7 microm (P < 0.023). An analogue of cGMP in the MD reversed the TGF-potentiating effect of both 7-nitroindazole (7NI; an nNOS inhibitor) and LY83583. Inhibition of MD guanylate cyclase did not alter the effect of acetylcholine (a NO-cGMP-dependent vasodilator) on the Af-Art. Perfusing the Af-Art with the guanylate cyclase inhibitor did not potentiate TGF, suggesting that the effect of NO occurred at the MD via a cGMP-dependent mechanism. To determine whether the effect of NO in the MD was entirely mediated by cGMP, TGF was studied after giving (1) LY83583 or (2) LY83583 plus 7NI. Adding the nNOS inhibitor to the MD did not potentiate the TGF response further. CONCLUSIONS We concluded the following: (1) NO produced by the MD inhibits TGF via stimulation of soluble guanylate cyclase, generating cGMP and activating cGMP-dependent protein kinase; (2) NO acts on the MD itself rather than by diffusing to the Af-Art; and (3) most, if not all, of the effect of NO in the MD is due to a cGMP-dependent mechanism rather than to other NO mediators.
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Affiliation(s)
- Y L Ren
- Hypertension and Vascular Research Division, Henry Ford Hospital, Detroit, Michigan 48202, USA
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Annis PC, Ren YL, Desmarchelier JM, Johnston FM. Fate of (14)C-labeled carbonyl sulfide on grains and grain fractions. J Agric Food Chem 2000; 48:3646-3650. [PMID: 10956164 DOI: 10.1021/jf9908805] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
14C-Labeled carbonyl sulfide (COS) was used to measure the amount of sorbed fumigant and alteration products on grains. Wheat, paddy rice, polished rice, mungbean, and safflower were exposed to a 60 mg L(-)(1) of (14)COS for 7 days and then aired for 5 days. Carbonyl sulfide and/or alteration products in sugars, protein, starch, amino acids, protopectines, and hemicelluloses were undetectable. The total uptakes of radioactivity determined after fractionation and also by extraction were in the range of 36-53 ng g(-)(1) COS equiv. The total radioactivity determined by autoradiography was below the detection limit of 70 ng g(-)(1) COS equiv. Radioactivity in the commodities was less than 0.003% of all the radioactivity applied. The amount of retained radiolabel was measured in three ways. First, biochemical fractions such as lipids and amino acids were separated by chromatography, and the activity was determined in each component. Second, commodities were crushed and extracted in aqueous acetone until the maximum amount of radiolabel was extracted. Third, autoradiography was carried out on commodity kernels.
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Affiliation(s)
- P C Annis
- CSIRO Entomology, Canberra, Australian Capital Territory
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Liu XQ, Ren YL, Qian ZY, Wang GJ. Enzyme kinetics and inhibition of nimodipine metabolism in human liver microsomes. Acta Pharmacol Sin 2000; 21:690-4. [PMID: 11501176] [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: 02/21/2023] Open
Abstract
AIM To study the enzyme kinetics of nimodipine (NDP) metabolism and the effects of selective cytochrome P-450 (CYP-450) inhibitors on the metabolism of NDP in human liver microsomes in vitro. METHODS Microsomes from six individual human liver specimens were used to perform enzyme kinetic studies and the kinetic parameters were estimated by Eadie-Hofstee equation. Various selective CYP-450 inhibitors were used to investigate their effects on the metabolism of NDP and the principal CYP-450 isoform involved in dehydrogenation of dihydropyridine ring of NDP in human liver microsomes. RESULTS There was an important intersubject variability in NDP metabolism in human liver microsomes. For NDP dehydrogenase activity, the Km value was (36 +/- 11) mumol and the Vm value was (17 +/- 7) mumol.g-1.min-1. The dehydrogenation of dihydropyridine ring of NDP was competitively inhibited by ketoconazole (Ket) and troleandomycin (TAO), and the Ki values for Ket and TAO were 0.59 and 122.2 mumol, respectively. Phenacetin (Pnt), quinidine (Qui), diethyldithiocarbamate (DDC), sulfaphenazole (Sul), and tranylcypromine (Tra) had a little or no inhibitory effects on the dehydrogenation of NDP. CONCLUSION The intersubject variability of NDP pharmacokinetics was attributed to the metabolic polymorphism of NDP in liver. Cytochrome P-4503A (CYP3A) is involved in the dehydrogenation of dihydropyridine ring of NDP.
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Affiliation(s)
- X Q Liu
- Center of Drug Metabolism and Pharmacokinetics, China Pharmaceutical University, Nanjing 210009, China.
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Ren YL, Desmarchelier JM. Release of fumigant residues from grain by microwave irradiation. J AOAC Int 1998; 81:673-8. [PMID: 9606927] [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: 02/07/2023]
Abstract
Multiresidue analysis of fumigants is important because of their widespread use on staple foodstuffs, such as grain. Fumigants are usually extracted from grain either by solvent extraction or by purge-and-trap techniques. In this paper, fumigant residues in wheat were "extracted" by a microwave procedure. Wheat, in gas-tight Erlenmeyer flasks, was placed in a domestic microwave oven, and fumigants were released into the headspace by microwave irradiation. Power settings for maximum release of fumigants were determined for CH3Br, PH3, CS2, and COS. Recoveries of fortified samples were > 90%. Completeness of extraction was assessed from the amount of fumigant retained by the microwave-irradiated wheat. This amount, determined from both solvent extraction and from further microwave irradiation, was always small (< 5% of the amount obtained from the initial procedure). Limits of quantitation were < 1 ng/g for CH3Br, PH3, and CS2. These low limits were essentially due to the absence of interference from solvents. The microwave method is rapid and solvent-free. However, care is required in selecting the appropriate power setting. The safety implications of heating sealed flasks in microwave ovens should be noted.
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Affiliation(s)
- Y L Ren
- University of Canberra, Faculty of Applied Science, Belconnen, ACT, Australia
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Wu CM, Zheng HY, Ren YL. [Immune interference of enteroviruses to immune response of TOPV in subtroptical areas]. Zhonghua Liu Xing Bing Xue Za Zhi 1996; 17:233-5. [PMID: 9387590] [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: 02/05/2023]
Abstract
To study whether enteroviruses interfere with the immunoeffect of TOPV in subtroptical areas, a total number of 188 children were investigated 82 in summer, 106 in winter in two townships of Hui Dong County from 1992 to 1993. The carrier rates of enteroviruses and serum nutralization antibody titres of polio were tested before and after the children were vaccinated with TOPV. Data showed that the GMTs of poliovirus type I, II, III in winter were 2 to 7.1 times as much as those in summer after administration of one and three doses TOPV. Enterovirus carrier rates were 75.6% and 38.8% respectively in summer and winter before vaccination in health children. The GMTs of polio serum antibody in children without enteroviruses was 1.5 to 1.7 times as much as the GMTs of those with enteroviruses, and the difference was statistically significant. Overall, the results demonstrated that enterovirus infection interfered the immune response of vaccinates to TOPV to some extent. It was also suggested that supplemental immunization was the key measure in polio eradication program and should be conducted in winter or spring seasons.
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Affiliation(s)
- C M Wu
- Health and Epidemic Prevention of Guangdong Province, Guangzhou
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Abstract
The macula densa, a plaque of specialized tubular epithelial cells, monitors NaCl concentrations in tubular fluid and controls resistance of the glomerular afferent arteriole (AA). In vivo micropuncture studies suggest that there are significant interactions between angiotensin II (Ang II) and macula densa control of glomerular hemodynamics. We tested the hypothesis that Ang II causes stronger constriction of the AA when NaCl concentration at the macula densa is elevated. Rabbit AAs and the attached macula densa were simultaneously microperfused in vitro, and dose-response curves to Ang II were obtained when the macula densa was not perfused or was perfused with either low NaCl (Na+, 26 mEq/L; Cl-, 7 mEq/L) or high NaCl (Na+, 84 mEq/L; Cl-, 65 mEq/L). Ang II induced stronger constriction when the macula densa was perfused with high NaCl; the decrease in diameter at 100 pmol/L was 29 +/- 5.6% (n= 7) compared with 2.1 +/- 1.2% (n=8) for the nonperfused macula densa or 6.1 +/- 4.2% (n=7) for low NaCl (P < .002). However, there was no such difference in the action of norepinephrine. Adding furosemide (10 micromol/L) to the macula densa perfusate abolished the difference in Ang II action between low and high NaCl at the macula densa. Since AA tone is higher when the NaCl concentration at the macula densa is elevated, we tested whether augmented Ang II action is due to higher AA tone. Preconstriction of the AA by 20% with norepinephrine had no effect on Ang II action. Thus, our results demonstrate that sensitivity of the AA to Ang II increases when NaCl concentration at the macula densa is elevated. Such modulation of Ang II action by macula densa NaCl concentration may be important in the control of glomerular hemodynamics.
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Affiliation(s)
- Y L Ren
- Hypertension and Vascular Research Division, Henry Ford Hospital, Detroit, MI 48202, USA
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Spinardi L, Ren YL, Sanders R, Giancotti FG. The beta 4 subunit cytoplasmic domain mediates the interaction of alpha 6 beta 4 integrin with the cytoskeleton of hemidesmosomes. Mol Biol Cell 1993; 4:871-84. [PMID: 8257791 PMCID: PMC275718 DOI: 10.1091/mbc.4.9.871] [Citation(s) in RCA: 102] [Impact Index Per Article: 3.3] [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: 01/29/2023] Open
Abstract
The alpha 6 beta 4 integrin is structurally distinct from all the other known integrins because the cytoplasmic domain of beta 4 is unusually large and contains four type III fibronectin-like modules toward its C-terminus. To examine the function of the beta 4 cytoplasmic tail, we have expressed full-length and truncated human beta 4 cDNAs in rat bladder epithelial 804G cells, which form hemidesmosome-like adhesions in vitro. The cDNA encoded wild-type beta 4 subunit associated with endogenous alpha 6 and was recruited at the cell surface within hemidesmosome-like adhesions. A recombinant form of beta 4, lacking almost the entire cytoplasmic domain associated with alpha 6, reached the cell surface but remained diffusely distributed. A beta 4 molecule lacking almost the entire extracellular portion did not associate with alpha 6 but was correctly targeted to the hemidesmosome-like adhesions. Thus, the cytoplasmic portion of beta 4 contains sequences that are required and may be sufficient for the assembly of the alpha 6 beta 4 integrin into hemidesmosomes. To localize these sequences we examined the properties of additional mutant forms of beta 4. A truncated beta 4 subunit, lacking the most C-terminal pair of type III fibronectin homology domains, was incorporated into hemidesmosome-like adhesions, but another recombinant beta 4 molecule, lacking both pairs of type III fibronectin repeats, was not. Finally a recombinant beta 4 molecule, which was created by adjoining the region of the cytoplasmic domain including all type III repeats to the transmembrane segment, was efficiently recruited in hemidesmosome-like adhesions. Taken together these results suggest that the assembly of the alpha 6 beta 4 integrin into hemidesmosomes is mediated by a 303-amino acid region of beta 4 tail that comprises the first pair of type III fibronectin repeats and the segment between the second and third repeats. These data imply a function of a specific segment of the beta 4 cytoplasmic domain in interaction with cytoskeletal components of hemidesmosomes.
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Affiliation(s)
- L Spinardi
- Department of Pathology, New York University School of Medicine, New York 10016
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