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Wang R, Fortier TM, Chai F, Miao G, Shen JL, Restrepo LJ, DiGiacomo JJ, Velentzas PD, Baehrecke EH. PINK1, Keap1, and Rtnl1 regulate selective clearance of endoplasmic reticulum during development. Cell 2023; 186:4172-4188.e18. [PMID: 37633267 PMCID: PMC10530463 DOI: 10.1016/j.cell.2023.08.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 04/27/2023] [Accepted: 08/07/2023] [Indexed: 08/28/2023]
Abstract
Selective clearance of organelles, including endoplasmic reticulum (ER) and mitochondria, by autophagy plays an important role in cell health. Here, we describe a developmentally programmed selective ER clearance by autophagy. We show that Parkinson's disease-associated PINK1, as well as Atl, Rtnl1, and Trp1 receptors, regulate ER clearance by autophagy. The E3 ubiquitin ligase Parkin functions downstream of PINK1 and is required for mitochondrial clearance while having the opposite function in ER clearance. By contrast, Keap1 and the E3 ubiquitin ligase Cullin3 function downstream of PINK1 to regulate ER clearance by influencing Rtnl1 and Atl. PINK1 regulates a change in Keap1 localization and Keap1-dependent ubiquitylation of the ER-phagy receptor Rtnl1 to facilitate ER clearance. Thus, PINK1 regulates the selective clearance of ER and mitochondria by influencing the balance of Keap1- and Parkin-dependent ubiquitylation of substrates that determine which organelle is removed by autophagy.
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Affiliation(s)
- Ruoxi Wang
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Tina M Fortier
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Fei Chai
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Guangyan Miao
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - James L Shen
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Lucas J Restrepo
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Jeromy J DiGiacomo
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Panagiotis D Velentzas
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Eric H Baehrecke
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA.
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2
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He SR, Liu LT, Chen RM, Wang MG, Hu ST, Miao G, Chen L, Liu DG. [Diagnostic values of nuclear score combined with cyclin D1 immunocytochemistry in indeterminate thyroid follicular nodules in preoperative fine needle aspiration]. Zhonghua Bing Li Xue Za Zhi 2023; 52:696-701. [PMID: 37408400 DOI: 10.3760/cma.j.cn112151-20230116-00046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Subscribe] [Scholar Register] [Indexed: 07/07/2023]
Abstract
Objective: To assess the feasibility of nuclear score combined with cyclin D1 immunocytochemistry in classifying indeterminate thyroid nodules with fine-needle aspiration (FNA) cytological diagnosis of Bethesda category Ⅲ-Ⅴ. Methods: A consecutive cohort of 118 thyroid FNA specimens with indeterminate diagnosis (TBSRTC category Ⅲ-Ⅴ) and available histopathologic follow-up data were collected between December 2018 and April 2022 at the Department of Pathology, Beijing Hospital, China. These cases were subjected to cytological evaluation and cyclin D1 immunocytochemistry. The optimal cut-off points of a simplified nuclear score and the percentage of cyclin D1-positive cells for the diagnosis of malignancy or low-risk neoplasm were determined using the receiver operating characteristic (ROC) curves and area under the ROC curve (AUC). The specificity, sensitivity, positive predictive value (PPV) and negative predictive value (NPV) of nuclear score and cyclin D1 immunostaining were evaluated from the crosstabs based on cut-off points. The diagnostic accuracy of simplified nuclear score combined with cyclin D1 immunostaining was estimated using ROC curve analysis. Results: Nuclear grooves, intra-nuclear inclusions and chromatin clearing were more commonly found in malignancy/low-risk neoplasms than benign lesions (P=0.001, P=0.012 and P=0.001 respectively). A cut-off point of≥2 for the simplified nuclear score was sensitive for defining malignancy/low-risk neoplasm, and its PPV, NPV, sensitivity and specificity were 93.6%, 87.5%, 99.0% and 50.0% respectively. A positive cut-off point of 10% positive thyroid cells in cyclin D1 immunostaining demonstrated sensitivity of 88.5%, specificity of 100%, PPV of 100% and NPV of 53.8% for correctly detecting thyroid malignancy or low-risk neoplasm. The sensitivity and PPV of simplified nuclear score combined with cyclin D1 immunostaining were 93.3% and 100%, respectively. Both specificity and NPV were maintained at high levels (100% and 66.7%, respectively). The diagnostic accuracy of simplified nuclear score combined with cyclin D1 immunostaining in detecting thyroid malignancy/low-risk neoplasm was increased to 94.1% compared to using either of them alone. Conclusions: Combing simplified nuclear score and cyclin D1 immunostaining on FNA cytology specimens can increase the diagnostic accuracy in classifying thyroid nodules of indeterminate cytological categories. Thus, this supplementary approach provides a simple, accurate, and convenient diagnostic method for cytopathologists so that may reduce unnecessary thyroidectomies.
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Affiliation(s)
- S R He
- Department of Pathology, Beijing Hospital, National Center of Gerontology; Institute of Geriatric Medicine, Chinese Academy of Medical Science, Beijing 100730,China
| | - L T Liu
- Department of Pathology, Beijing Hospital, National Center of Gerontology; Institute of Geriatric Medicine, Chinese Academy of Medical Science, Beijing 100730,China
| | - R M Chen
- Department of Pathology, the People's Hospital of Changfeng County, Anhui Province, Hefei 231100, China
| | - M G Wang
- Department of Pathology, Beijing Shijingshan Hospital, Beijing 100043, China
| | - S T Hu
- Department of Pathology, Beijing Hospital, National Center of Gerontology; Institute of Geriatric Medicine, Chinese Academy of Medical Science, Beijing 100730,China
| | - G Miao
- Department of General Surgery, Beijing Hospital, National Center of Gerontology; Institute of Geriatric Medicine, Chinese Academy of Medical Science, Beijing 100730, China
| | - L Chen
- Department of Pathology, Beijing Hospital, National Center of Gerontology; Institute of Geriatric Medicine, Chinese Academy of Medical Science, Beijing 100730,China
| | - D G Liu
- Department of Pathology, Beijing Hospital, National Center of Gerontology; Institute of Geriatric Medicine, Chinese Academy of Medical Science, Beijing 100730,China
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Wang R, Miao G, Shen JL, Fortier TM, Baehrecke EH. ESCRT dysfunction compromises endoplasmic reticulum maturation and autophagosome biogenesis in Drosophila. Curr Biol 2022; 32:1262-1274.e4. [PMID: 35134326 PMCID: PMC8969116 DOI: 10.1016/j.cub.2022.01.040] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [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] [Received: 10/06/2021] [Revised: 12/09/2021] [Accepted: 01/13/2022] [Indexed: 12/20/2022]
Abstract
Autophagy targets cytoplasmic materials for degradation and influences cell health. Organelle contact and trafficking systems provide membranes for autophagosome formation, but how different membrane systems are selected for use during autophagy remains unclear. Here, we report a novel function of the endosomal sorting complex required for transport (ESCRT) in the regulation of endoplasmic reticulum (ER) coat protein complex II (COPII) vesicle formation that influences autophagy. The ESCRT functions in a pathway upstream of Vps13D to influence COPII vesicle transport, ER-Golgi intermediate compartment (ERGIC) assembly, and autophagosome formation. Atg9 functions downstream of the ESCRT to facilitate ERGIC and autophagosome formation. Interestingly, cells lacking either ESCRT or Vps13D functions exhibit dilated ER structures that are similar to cranio-lenticulo-sutural dysplasia patient cells with SEC23A mutations, which encodes a component of COPII vesicles. Our data reveal a novel ESCRT-dependent pathway that influences the ERGIC and autophagosome formation.
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Affiliation(s)
- Ruoxi Wang
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Guangyan Miao
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - James L Shen
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Tina M Fortier
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Eric H Baehrecke
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA.
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4
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Miao G, Zhao H, Li Y, Ji M, Chen Y, Shi Y, Bi Y, Wang P, Zhang H. ORF3a of the COVID-19 virus SARS-CoV-2 blocks HOPS complex-mediated assembly of the SNARE complex required for autolysosome formation. Dev Cell 2020; 56:427-442.e5. [PMID: 33422265 PMCID: PMC7832235 DOI: 10.1016/j.devcel.2020.12.010] [Citation(s) in RCA: 215] [Impact Index Per Article: 53.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 11/29/2020] [Accepted: 12/11/2020] [Indexed: 02/07/2023]
Abstract
Autophagy acts as a cellular surveillance mechanism to combat invading pathogens. Viruses have evolved various strategies to block autophagy and even subvert it for their replication and release. Here, we demonstrated that ORF3a of the COVID-19 virus SARS-CoV-2 inhibits autophagy activity by blocking fusion of autophagosomes/amphisomes with lysosomes. The late endosome-localized ORF3a directly interacts with and sequestrates the homotypic fusion and protein sorting (HOPS) component VPS39, thereby preventing HOPS complex from interacting with the autophagosomal SNARE protein STX17. This blocks assembly of the STX17-SNAP29-VAMP8 SNARE complex, which mediates autophagosome/amphisome fusion with lysosomes. Expression of ORF3a also damages lysosomes and impairs their function. SARS-CoV-2 virus infection blocks autophagy, resulting in accumulation of autophagosomes/amphisomes, and causes late endosomal sequestration of VPS39. Surprisingly, ORF3a from the SARS virus SARS-CoV fails to interact with HOPS or block autophagy. Our study reveals a mechanism by which SARS-CoV-2 evades lysosomal destruction and provides insights for developing new strategies to treat COVID-19.
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Affiliation(s)
- Guangyan Miao
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, P.R. China
| | - Hongyu Zhao
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, P.R. China
| | - Yan Li
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, P.R. China
| | - Mingming Ji
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, P.R. China
| | - Yong Chen
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, P.R. China
| | - Yi Shi
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, P.R. China
| | - Yuhai Bi
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, P.R. China
| | - Peihui Wang
- Advanced Medical Research Institute, Cheeloo College of Medicine, Shandong University, Ji'nan, Shandong 250012, P.R. China
| | - Hong Zhang
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, P.R. China; College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, P.R. China.
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5
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Adrissi J, Miao G, Yu Y, Simuni T. Impact of race and socioeconomic status on the utilization of advanced therapies in Parkinson's Disease. Parkinsonism Relat Disord 2020. [DOI: 10.1016/j.parkreldis.2020.06.280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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6
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Li D, Zhao YG, Li D, Zhao H, Huang J, Miao G, Feng D, Liu P, Li D, Zhang H. The ER-Localized Protein DFCP1 Modulates ER-Lipid Droplet Contact Formation. Cell Rep 2020; 27:343-358.e5. [PMID: 30970241 DOI: 10.1016/j.celrep.2019.03.025] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [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: 02/20/2018] [Revised: 10/29/2018] [Accepted: 03/07/2019] [Indexed: 12/12/2022] Open
Abstract
Very little is known about the spatiotemporal generation of lipid droplets (LDs) from the endoplasmic reticulum (ER) and the factors that mediate ER-LD contacts for LD growth. Using super-resolution grazing incidence structured illumination microscopy (GI-SIM) live-cell imaging, we reveal that upon LD induction, the ER-localized protein DFCP1 redistributes to nascent puncta on the ER, whose formation depends on triglyceride synthesis. These structures move along the ER and fuse to form expanding LDs. Fusion and expansion of DFCP1-labeled nascent structures is controlled by BSCL2. BSCL2 depletion causes accumulation of nascent DFCP1 structures. DFCP1 overexpression increases LD size and enhances ER-LD contacts, while DFCP1 knockdown has the opposite effect. DFCP1 acts as a Rab18 effector for LD localization and interacts with the Rab18-ZW10 complex to mediate ER-LD contact formation. Our study reveals that fusion of DFCP1-labeled nascent structures contributes to initial LD growth and that the DFCP1-Rab18 complex is involved in tethering the ER-LD contact for LD expansion.
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Affiliation(s)
- Dongfang Li
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China; College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yan G Zhao
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Di Li
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China
| | - Hongyu Zhao
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China
| | - Jie Huang
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China
| | - Guangyan Miao
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China
| | - Du Feng
- School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou 511436, China
| | - Pingsheng Liu
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China
| | - Dong Li
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China; College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Hong Zhang
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China; College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China.
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7
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Xue Y, Zhang P, Miao G, Zhou B. P5386Transplantation of endothelial progenitor cells in the treatment of coronary artery microembolism in rats. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz746.0346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Objective
As the impairment of myocardial micro-environments due to coronary micro-embolization (CME) compromises the treatment effect of percutaneous coronary intervention and leads to adverse prognosis, we hypothesized that endothelial progenitor cells (EPCs) transplantation could improve cardiac function in the condition of CME.
Materials and methods
Low- (2×105) and high- (2×106) dose rat bone marrow-derived EPCs were transplanted in a model of CME. To develop a CME model, rats were injected with autologous micro-blood clots into the left ventricle. Echocardiography was examined before and 1, 7, and 28 days after EPC transplantation; serum cTNI, vWF,and cardiac microRNA expression were examined one day after EPCs transplantation. Heart morphology and VEGF, vWF, and bFGF expression were examined one day after EPC transplantation.
Figure 1. Results
Results
After 10 days of culture inductions, BM-EPCs have high purity as confirmed by flow cytometry. Cardiac function reflected by LVEF significantly decreased after CME treatment and rescued by low-dose EPC. Compared to the sham group, cTNI, and vWF serum levels increased significantly after CME treatment and rescued by low-dose EPC and high-dose EPC. Low-dose EPC treatment decreased myocardial necrosis and fibrosis and elevated cardiac expression of VEGF and vWF, while decreasing the cardiac expression of bFGF. Low-dose EPC treatment significantly suppressed cardiac expression of microRNA-19a but significantly enhanced microRNA-21, microRNA-214, and microRNA-486-3p expression. In conclusion, our results indicate that low-dose EPC transplantation may play a pro-angiogenic, anti-fibroblast, anti-fibrosis, and anti-necrosis role and enhance cardiac function in a rat model of CME through a microRNA-related pathway.
Acknowledgement/Funding
Supported by the State Key Laboratory of Low-Dimensional Quantum Physics Open Project Fund (No. KF201608)
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Affiliation(s)
- Y Xue
- Tsinghua Chang Gung Memorial Hospital, Beijing, China
| | - P Zhang
- Tsinghua Chang Gung Memorial Hospital, Beijing, China
| | - G Miao
- Tsinghua Chang Gung Memorial Hospital, Beijing, China
| | - B Zhou
- Tsinghua Chang Gung Memorial Hospital, Beijing, China
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8
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Zhao YG, Liu N, Miao G, Chen Y, Zhao H, Zhang H. The ER Contact Proteins VAPA/B Interact with Multiple Autophagy Proteins to Modulate Autophagosome Biogenesis. Curr Biol 2018; 28:1234-1245.e4. [PMID: 29628370 DOI: 10.1016/j.cub.2018.03.002] [Citation(s) in RCA: 115] [Impact Index Per Article: 19.2] [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: 11/29/2017] [Revised: 02/09/2018] [Accepted: 03/01/2018] [Indexed: 02/03/2023]
Abstract
The endoplasmic reticulum (ER) is the site of biogenesis of the isolation membrane (IM, autophagosome precursor) and forms extensive contacts with IMs during their expansion into double-membrane autophagosomes. Little is known about the molecular mechanism underlying the formation and/or maintenance of the ER/IM contact. The integral ER proteins VAPA and VAPB (VAPs) participate in establishing ER contacts with multiple membranes by interacting with different tethers. Here, we demonstrate that VAPs also modulate ER/IM contact formation. Depletion of VAPs impairs progression of IMs into autophagosomes. Upon autophagy induction, VAPs are recruited to autophagosome formation sites on the ER, a process mediated by their interactions with FIP200 and PI(3)P. VAPs directly interact with FIP200 and ULK1 through their conserved FFAT motifs and stabilize the ULK1/FIP200 complex at the autophagosome formation sites on the ER. The formation of ULK1 puncta is significantly reduced by VAPA/B depletion. VAPs also interact with WIPI2 and enhance the formation of the WIPI2/FIP200 ER/IM tethering complex. Depletion of VMP1, which increases the ER/IM contact, greatly elevates the interaction of VAPs with these autophagy proteins. The VAPB P56S mutation, which is associated with amyotrophic lateral sclerosis, reduces the ULK1/FIP200 interaction and impairs autophagy at an early step, similar to the effect seen in VAPA/B-depleted cells. Our study reveals that VAPs directly interact with multiple ATG proteins, thereby contributing to ER/IM contact formation for autophagosome biogenesis.
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Affiliation(s)
- Yan G Zhao
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Beijing 100101, China
| | - Nan Liu
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Beijing 100101, China
| | - Guangyan Miao
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Beijing 100101, China
| | - Yong Chen
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Beijing 100101, China
| | - Hongyu Zhao
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Beijing 100101, China
| | - Hong Zhang
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Beijing 100101, China; College of Life Sciences, University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing 100049, China.
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9
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Abstract
Autophagy helps to maintain cellular homeostasis by removing misfolded proteins and damaged organelles, and generally acts as a cytoprotective mechanism for neuronal survival. Here we showed that mice deficient in the Vici syndrome gene Epg5, which is required for autophagosome maturation, show accumulation of ubiquitin-positive inclusions and SQSTM1 aggregates in various retinal cell types. In epg5-/- retinas, photoreceptor function is greatly impaired, and degenerative features including progressively reduced numbers of photoreceptor cells and increased numbers of apoptotic cells in the outer nuclear layer are observed, while the morphology of other parts of the retina is not severely affected. Downstream targets of the unfolded protein response (UPR), including the death inducer DDIT3/CHOP, and also levels of cleaved CASP3 (caspase 3), are elevated in epg5-/- retinas. Thus, apoptotic photoreceptor cell death in epg5-/- retinas may result from the elevated UPR. Our results reveal that Epg5-deficient mice recapitulate key characteristics of retinitis pigmentosa and thus may provide a valuable model for investigating the molecular mechanism of photoreceptor degeneration.
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Affiliation(s)
- Guangyan Miao
- a Department of Immunology , Peking University School of Basic Medical Science , Beijing , China.,b State Key Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences , Beijing , China
| | - Yan G Zhao
- b State Key Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences , Beijing , China
| | - Hongyu Zhao
- b State Key Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences , Beijing , China
| | - Cuicui Ji
- b State Key Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences , Beijing , China
| | - Huayu Sun
- b State Key Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences , Beijing , China
| | - Yingyu Chen
- a Department of Immunology , Peking University School of Basic Medical Science , Beijing , China
| | - Hong Zhang
- b State Key Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences , Beijing , China
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Wang Z, Miao G, Xue X, Guo X, Yuan C, Wang Z, Zhang G, Chen Y, Feng D, Hu J, Zhang H. The Vici Syndrome Protein EPG5 Is a Rab7 Effector that Determines the Fusion Specificity of Autophagosomes with Late Endosomes/Lysosomes. Mol Cell 2016; 63:781-95. [PMID: 27588602 DOI: 10.1016/j.molcel.2016.08.021] [Citation(s) in RCA: 193] [Impact Index Per Article: 24.1] [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: 06/14/2016] [Revised: 07/29/2016] [Accepted: 08/12/2016] [Indexed: 01/08/2023]
Abstract
Mutations in the human autophagy gene EPG5 cause the multisystem disorder Vici syndrome. Here we demonstrated that EPG5 is a Rab7 effector that determines the fusion specificity of autophagosomes with late endosomes/lysosomes. EPG5 is recruited to late endosomes/lysosomes by direct interaction with Rab7 and the late endosomal/lysosomal R-SNARE VAMP7/8. EPG5 also binds to LC3/LGG-1 (mammalian and C. elegans Atg8 homolog, respectively) and to assembled STX17-SNAP29 Qabc SNARE complexes on autophagosomes. EPG5 stabilizes and facilitates the assembly of STX17-SNAP29-VAMP7/8 trans-SNARE complexes, and promotes STX17-SNAP29-VAMP7-mediated fusion of reconstituted proteoliposomes. Loss of EPG5 activity causes abnormal fusion of autophagosomes with various endocytic vesicles, in part due to elevated assembly of STX17-SNAP25-VAMP8 complexes. SNAP25 knockdown partially suppresses the autophagy defect caused by EPG5 depletion. Our study reveals that EPG5 is a Rab7 effector involved in autophagosome maturation, providing insight into the molecular mechanism underlying Vici syndrome.
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Affiliation(s)
- Zheng Wang
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, PRC
| | - Guangyan Miao
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, PRC; Department of Immunology, Peking University School of Basic Medical Science, Beijing 100191, PRC
| | - Xue Xue
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, PRC
| | - Xiangyang Guo
- College of Life Sciences, Nankai University, Tianjin 300071, PRC
| | - Chongzhen Yuan
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, PRC
| | - Zhaoyu Wang
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, PRC
| | - Gangming Zhang
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, PRC
| | - Yingyu Chen
- Department of Immunology, Peking University School of Basic Medical Science, Beijing 100191, PRC
| | - Du Feng
- Institute of Neurology, Affiliated Hospital of Guangdong Medical College, Zhanjiang 524001, PRC
| | - Junjie Hu
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, PRC
| | - Hong Zhang
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, PRC; College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, PRC.
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11
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Zhao YG, Sun L, Miao G, Ji C, Zhao H, Sun H, Miao L, Yoshii SR, Mizushima N, Wang X, Zhang H. The autophagy gene Wdr45/Wipi4 regulates learning and memory function and axonal homeostasis. Autophagy 2016; 11:881-90. [PMID: 26000824 DOI: 10.1080/15548627.2015.1047127] [Citation(s) in RCA: 100] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
WDR45/WIPI4, encoding a WD40 repeat-containing PtdIns(3)P binding protein, is essential for the basal autophagy pathway. Mutations in WDR45 cause the neurodegenerative disease β-propeller protein-associated neurodegeneration (BPAN), a subtype of NBIA. We generated CNS-specific Wdr45 knockout mice, which exhibit poor motor coordination, greatly impaired learning and memory, and extensive axon swelling with numerous axon spheroids. Autophagic flux is defective and SQSTM1 (sequestosome-1)/p62 and ubiquitin-positive protein aggregates accumulate in neurons and swollen axons. Nes-Wdr45(fl/Y) mice recapitulate some hallmarks of BPAN, including cognitive impairment and defective axonal homeostasis, providing a model for revealing the disease pathogenesis of BPAN and also for investigating the possible role of autophagy in axon maintenance.
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Key Words
- ACTB, β-actin
- AMC, aminomethylcoumarin
- Atg, autophagy-related
- BPAN, β-propeller protein-associated neurodegeneration
- CALB, calbindin
- CNS, central nervous system
- DCN, deep cerebellar nuclei
- Ei24, etoposide-induced gene 24
- GFAP, glial fibrillary acid protein
- H&E, hematoxylin and eosin
- KO, knockout
- LC3, microtubule-associated protein 1 light chain 3
- LTP, long-term potentiation
- MBP, myelin basic protein
- NBIA, neurodegeneration with brain iron accumulation
- RBFOX3, RNA binding protein, fox-1 homolog (C. elegans) 3
- SENDA, static encephalopathy of childhood with neurodegeneration in adulthood
- SQSTM1, sequestosome-1
- WDR5/WIPI4, WD repeat domain 45
- WT, wild type.
- Wdr45/Wipi4
- autophagy
- axon swelling
- epg, ectopic P granule
- fEPSP, field excitatory postsynaptic potential
- learning and memory
- neurodegeneration
- rpm, rotations per min
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Affiliation(s)
- Yan G Zhao
- a State Key Laboratory of Biomacromolecules; Institute of Biophysics; Chinese Academy of Sciences ; Beijing , China
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Luo H, Zhu CC, Tan ZC, Bao LW, Wang JJ, Miao G, Kong LZ, Sun YH. Preparation of N-doped activated carbons with high CO2 capture performance from microalgae (Chlorococcum sp.). RSC Adv 2016. [DOI: 10.1039/c6ra04106j] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
N-Doped activated carbons with high CO2 adsorption capacity have been prepared from sugar-rich microalgae (Chlorococcum sp.) feedstock via simple hydrothermal carbonization coupled with KOH activation or NH3 modification.
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Affiliation(s)
- H. Luo
- CAS Key Laboratory of Low-Carbon Conversion Science and Engineering
- Shanghai Advanced Research Institute
- Chinese Academy of Sciences
- Shanghai 201210
- PR China
| | - C. C. Zhu
- CAS Key Laboratory of Low-Carbon Conversion Science and Engineering
- Shanghai Advanced Research Institute
- Chinese Academy of Sciences
- Shanghai 201210
- PR China
| | - Z. C. Tan
- CAS Key Laboratory of Low-Carbon Conversion Science and Engineering
- Shanghai Advanced Research Institute
- Chinese Academy of Sciences
- Shanghai 201210
- PR China
| | - L. W. Bao
- CAS Key Laboratory of Low-Carbon Conversion Science and Engineering
- Shanghai Advanced Research Institute
- Chinese Academy of Sciences
- Shanghai 201210
- PR China
| | - J. J. Wang
- CAS Key Laboratory of Low-Carbon Conversion Science and Engineering
- Shanghai Advanced Research Institute
- Chinese Academy of Sciences
- Shanghai 201210
- PR China
| | - G. Miao
- CAS Key Laboratory of Low-Carbon Conversion Science and Engineering
- Shanghai Advanced Research Institute
- Chinese Academy of Sciences
- Shanghai 201210
- PR China
| | - L. Z. Kong
- CAS Key Laboratory of Low-Carbon Conversion Science and Engineering
- Shanghai Advanced Research Institute
- Chinese Academy of Sciences
- Shanghai 201210
- PR China
| | - Y. H. Sun
- CAS Key Laboratory of Low-Carbon Conversion Science and Engineering
- Shanghai Advanced Research Institute
- Chinese Academy of Sciences
- Shanghai 201210
- PR China
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13
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Li Y, Aggen S, Shi S, Gao J, Li Y, Tao M, Zhang K, Wang X, Gao C, Yang L, Liu Y, Li K, Shi J, Wang G, Liu L, Zhang J, Du B, Jiang G, Shen J, Zhang Z, Liang W, Sun J, Hu J, Liu T, Wang X, Miao G, Meng H, Li Y, Hu C, Li Y, Huang G, Li G, Ha B, Deng H, Mei Q, Zhong H, Gao S, Sang H, Zhang Y, Fang X, Yu F, Yang D, Liu T, Chen Y, Hong X, Wu W, Chen G, Cai M, Song Y, Pan J, Dong J, Pan R, Zhang W, Shen Z, Liu Z, Gu D, Wang X, Liu X, Zhang Q, Flint J, Kendler KS. Subtypes of major depression: latent class analysis in depressed Han Chinese women. Psychol Med 2014; 44:3275-3288. [PMID: 25065911 PMCID: PMC4180813 DOI: 10.1017/s0033291714000749] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
BACKGROUND Despite substantial research, uncertainty remains about the clinical and etiological heterogeneity of major depression (MD). Can meaningful and valid subtypes be identified and would they be stable cross-culturally? METHOD Symptoms at their lifetime worst depressive episode were assessed at structured psychiatric interview in 6008 women of Han Chinese descent, age ⩾ 30 years, with recurrent DSM-IV MD. Latent class analysis (LCA) was performed in Mplus. RESULTS; Using the nine DSM-IV MD symptomatic A criteria, the 14 disaggregated DSM-IV criteria and all independently assessed depressive symptoms (n = 27), the best LCA model identified respectively three, four and six classes. A severe and non-suicidal class was seen in all solutions, as was a mild/moderate subtype. An atypical class emerged once bidirectional neurovegetative symptoms were included. The non-suicidal class demonstrated low levels of worthlessness/guilt and hopelessness. Patterns of co-morbidity, family history, personality, environmental precipitants, recurrence and body mass index (BMI) differed meaningfully across subtypes, with the atypical class standing out as particularly distinct. CONCLUSIONS MD is a clinically complex syndrome with several detectable subtypes with distinct clinical and demographic correlates. Three subtypes were most consistently identified in our analyses: severe, atypical and non-suicidal. Severe and atypical MD have been identified in multiple prior studies in samples of European ethnicity. Our non-suicidal subtype, with low levels of guilt and hopelessness, may represent a pathoplastic variant reflecting Chinese cultural influences.
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Affiliation(s)
- Y. Li
- Wellcome Trust Centre for Human Genetics, Oxford, UK
| | - S. Aggen
- Department of Psychiatry, Virginia Institute for Psychiatric and Behavioral Genetics, Virginia Commonwealth University, Richmond, VA, USA
| | - S. Shi
- Shanghai Mental Health Center, P.R.C
- Huashan Hospital of Fudan University, Shanghai, P.R.C
| | - J. Gao
- Chinese Traditional Hospital of Zhejiang, Hangzhou, Zhejiang, P.R.C
| | - Y. Li
- No.1 Hospital of Zhengzhou University, Zhengzhou, Henan, P.R.C
| | - M. Tao
- Xinhua Hospital of Zhejiang Province, Hangzhou, Zhejiang, P.R.C
| | - K. Zhang
- No. 1 Hospital of Shanxi Medical University, Taiyuan, Shanxi, P.R.C
| | - X. Wang
- ShengJing Hospital of China Medical University, Heping District, Shenyang, Liaoning, P.R.C
| | - C. Gao
- No. 1 Hospital of Medical College of Xian Jiaotong University, Xian, Shaanxi, P.R.C
| | - L. Yang
- Jilin Brain Hospital, Siping, Jilin, P.R.C
| | - Y. Liu
- The First Hospital of China Medical University, Heping District, Shenyang, Liaoning, P.R.C
| | - K. Li
- Mental Hospital of Jiangxi Province, Nanchang, Jiangxi, P.R.C
| | - J. Shi
- Xian Mental Health Center, New Qujiang District, Xian, Shaanxi, P.R.C
| | - G. Wang
- Beijing Anding Hospital of Capital University of Medical Sciences, Xicheng District, Beijing, P.R.C
| | - L. Liu
- Shandong Mental Health Center, Jinan, Shandong, P.R.C
| | - J. Zhang
- No. 3 Hospital of Sun Yat-sen University, Tianhe District, Guangzhou, Guangdong, P.R.C
| | - B. Du
- Hebei Mental Health Center, Baoding, Hebei, P.R.C
| | - G. Jiang
- Chongqing Mental Health Center, Jiangbei District, Chongqing, P.R.C
| | - J. Shen
- Tianjin Anding Hospital, Hexi District, Tianjin, P.R.C
| | - Z. Zhang
- No. 4 Hospital of Jiangsu University, Zhenjiang, Jiangsu, P.R.C
| | - W. Liang
- Psychiatric Hospital of Henan Province, Xinxiang, Henan, P.R.C
| | - J. Sun
- Nanjing Brain Hospital, Nanjing, Jiangsu, P.R.C
| | - J. Hu
- Harbin Medical University, Nangang District, Haerbin, Heilongjiang, P.R.C
| | - T. Liu
- Shenzhen Kang Ning Hospital, Luohu District, Shenzhen, Guangdong, P.R.C
| | - X. Wang
- First Hospital of Hebei Medical University, Shijiazhuang, Hebei, P.R.C
| | - G. Miao
- Guangzhou Brain Hospital (Guangzhou Psychiatric Hospital), Liwan District, Guangzhou, Guangdong, P.R.C
| | - H. Meng
- No. 1 Hospital of Chongqing Medical University, Yuanjiagang, Yuzhong District, Chongqing, P.R.C
| | - Y. Li
- Dalian No. 7 Hospital, Ganjingzi District, Dalian, Liaoning, P.R.C
| | - C. Hu
- No. 3 Hospital of Heilongjiang Province, Beian, Heilongjiang, P.R.C
| | - Y. Li
- Wuhan Mental Health Center, Wuhan, Hubei, P.R.C
| | - G. Huang
- Sichuan Mental Health Center, Mianyang, Sichuan, P.R.C
| | - G. Li
- Mental Health Institute of Jining Medical College, Dai Zhuang, Bei Jiao, Jining, Shandong, P.R.C
| | - B. Ha
- Liaocheng No. 4 Hospital, Liaocheng, Shandong, P.R.C
| | - H. Deng
- Mental Health Center of West China Hospital of Sichuan University, Wuhou District, Chengdu, Sichuan, P.R.C
| | - Q. Mei
- Suzhou Guangji Hospital, Suzhou, Jiangsu, P.R.C
| | - H. Zhong
- Anhui Mental Health Center, Hefei, Anhui, P.R.C
| | - S. Gao
- Ningbo Kang Ning Hospital, Zhenhai District, Ningbo, Zhejiang, P.R.C
| | - H. Sang
- Changchun Mental Hospital, Changchun, Jilin, P.R.C
| | - Y. Zhang
- No. 2 Hospital of Lanzhou University, Lanzhou, Gansu, P.R.C
| | - X. Fang
- Fuzhou Psychiatric Hospital, Cangshan District, Fuzhou, Fujian, P.R.C
| | - F. Yu
- Harbin No. 1 Special Hospital, Haerbin, Heilongjiang, P.R.C
| | - D. Yang
- Jining Psychiatric Hospital, North Dai Zhuang, Rencheng District, Jining, Shandong, P.R.C
| | - T. Liu
- No. 2 Xiangya Hospital of Zhongnan University, Furong District, Changsha, Hunan, P.R.C
| | - Y. Chen
- Xijing Hospital of No. 4 Military Medical University, Xian, Shaanxi, P.R.C
| | - X. Hong
- Mental Health Center of Shantou University, Shantou, Guangdong, P.R.C
| | - W. Wu
- Tongji University Hospital, Shanghai, P.R.C
| | - G. Chen
- Huaian No. 3 Hospital, Huaian, Jiangsu, P.R.C
| | - M. Cai
- Huzhou No. 3 Hospital, Huzhou, Zhejiang, P.R.C
| | - Y. Song
- Mudanjiang Psychiatric Hospital of Heilongjiang Province, Xinglong, Mudanjiang, Heilongjiang, P.R.C
| | - J. Pan
- No. 1 Hospital of Jinan University, Guangzhou, Guangdong, P.R.C
| | - J. Dong
- Qingdao Mental Health Center, Shibei District, Qingdao, Shandong, P.R.C
| | - R. Pan
- Guangxi Longquanshan Hospital, Yufeng District, Liuzhou, P.R.C
| | - W. Zhang
- Daqing No. 3 Hospital of Heilongjiang Province, Ranghulu district, Daqing, Heilongjiang, P.R.C
| | - Z. Shen
- Tangshan No. 5 Hospital, Lunan District, Tangshan, Hebei, P.R.C
| | - Z. Liu
- Anshan Psychiatric Rehabilitation Hospital, Lishan District, Anshan, Liaoning, P.R.C
| | - D. Gu
- Weihai Mental Health Center, ETDZ, Weihai, Shandong, P.R.C
| | - X. Wang
- Renmin Hospital of Wuhan University, Wuchang District, Wuhan, Hubei, P.R.C
| | - X. Liu
- Tianjin First Center Hospital, Xinkai Road, Hedong District, Tianjin, P.R.C
| | - Q. Zhang
- Hainan Anning Hospital, Haikou, Hainan, P.R.C
| | - J. Flint
- Wellcome Trust Centre for Human Genetics, Oxford, UK
| | - K. S. Kendler
- Department of Psychiatry, Virginia Institute for Psychiatric and Behavioral Genetics, Virginia Commonwealth University, Richmond, VA, USA
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Li Y, Aggen S, Shi S, Gao J, Li Y, Tao M, Zhang K, Wang X, Gao C, Yang L, Liu Y, Li K, Shi J, Wang G, Liu L, Zhang J, Du B, Jiang G, Shen J, Zhang Z, Liang W, Sun J, Hu J, Liu T, Wang X, Miao G, Meng H, Li Y, Hu C, Li Y, Huang G, Li G, Ha B, Deng H, Mei Q, Zhong H, Gao S, Sang H, Zhang Y, Fang X, Yu F, Yang D, Liu T, Chen Y, Hong X, Wu W, Chen G, Cai M, Song Y, Pan J, Dong J, Pan R, Zhang W, Shen Z, Liu Z, Gu D, Wang X, Liu X, Zhang Q, Flint J, Kendler KS. The structure of the symptoms of major depression: exploratory and confirmatory factor analysis in depressed Han Chinese women. Psychol Med 2014; 44:1391-1401. [PMID: 23920138 PMCID: PMC3967839 DOI: 10.1017/s003329171300192x] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Revised: 06/20/2013] [Accepted: 07/02/2013] [Indexed: 02/05/2023]
Abstract
BACKGROUND The symptoms of major depression (MD) are clinically diverse. Do they form coherent factors that might clarify the underlying nature of this important psychiatric syndrome? METHOD Symptoms at lifetime worst depressive episode were assessed at structured psychiatric interview in 6008 women of Han Chinese descent, age ⩾30 years with recurrent DSM-IV MD. Exploratory factor analysis (EFA) and confirmatoryfactor analysis (CFA) were performed in Mplus in random split-half samples. RESULTS The preliminary EFA results were consistently supported by the findings from CFA. Analyses of the nine DSM-IV MD symptomatic A criteria revealed two factors loading on: (i) general depressive symptoms; and (ii) guilt/suicidal ideation. Examining 14 disaggregated DSM-IV criteria revealed three factors reflecting: (i) weight/appetite disturbance; (ii) general depressive symptoms; and (iii) sleep disturbance. Using all symptoms (n = 27), we identified five factors that reflected: (i) weight/appetite symptoms; (ii) general retarded depressive symptoms; (iii) atypical vegetative symptoms; (iv) suicidality/hopelessness; and (v) symptoms of agitation and anxiety. CONCLUSIONS MD is a clinically complex syndrome with several underlying correlated symptom dimensions. In addition to a general depressive symptom factor, a complete picture must include factors reflecting typical/atypical vegetative symptoms, cognitive symptoms (hopelessness/suicidal ideation), and an agitated symptom factor characterized by anxiety, guilt, helplessness and irritability. Prior cross-cultural studies, factor analyses of MD in Western populations and empirical findings in this sample showing risk factor profiles similar to those seen in Western populations suggest that our results are likely to be broadly representative of the human depressive syndrome.
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Affiliation(s)
- Y. Li
- Wellcome Trust Centre for Human Genetics, Oxford, UK
| | - S. Aggen
- Virginia Institute for Psychiatric and Behavioral Genetics, Department of Psychiatry, Virginia Commonwealth University, Richmond, VA, USA
| | - S. Shi
- Shanghai Mental Health Center, Shanghai, P.R. China (PRC)
- Huashan Hospital of Fudan University, Shanghai, PRC
| | - J. Gao
- Chinese Traditional Hospital of Zhejiang, Hangzhou, Zhejiang, PRC
| | - Y. Li
- No. 1 Hospital of Zhengzhou University, Zhengzhou, Henan, PRC
| | - M. Tao
- Xinhua Hospital of Zhejiang Province, Hangzhou, Zhejiang, PRC
| | - K. Zhang
- No. 1 Hospital of Shanxi Medical University, Taiyuan, Shanxi, PRC
| | - X. Wang
- ShengJing Hospital of China Medical University, Heping District, Shenyang, Liaoning, PRC
| | - C. Gao
- No. 1 Hospital of Medical College of Xian Jiaotong University, Xian, Shaanxi, PRC
| | - L. Yang
- Jilin Brain Hospital, Siping, Jilin, PRC
| | - Y. Liu
- The First Hospital of China Medical University, Heping District, Shenyang, Liaoning, PRC
| | - K. Li
- Mental Hospital of Jiangxi Province, Nanchang, Jiangxi, PRC
| | - J. Shi
- Xian Mental Health Center, New Qujiang District, Xian, Shaanxi, PRC
| | - G. Wang
- Beijing Anding Hospital of Capital University of Medical Sciences, Deshengmen wai, Xicheng District, Beijing, PRC
| | - L. Liu
- Shandong Mental Health Center, Jinan, Shandong, PRC
| | - J. Zhang
- No. 3 Hospital of Sun Yat-sen University, Tianhe District, Guangzhou, Guangdong, PRC
| | - B. Du
- Hebei Mental Health Center, Baoding, Hebei, PRC
| | - G. Jiang
- Chongqing Mental Health Center, Jiangbei District, Chongqing, PRC
| | - J. Shen
- Tianjin Anding Hospital, Hexi District, Tianjin, PRC
| | - Z. Zhang
- No. 4 Hospital of Jiangsu University, Zhenjiang, Jiangsu, PRC
| | - W. Liang
- Psychiatric Hospital of Henan Province, Xinxiang, Henan, PRC
| | - J. Sun
- Nanjing Brain Hospital, Nanjing, Jiangsu, PRC
| | - J. Hu
- Harbin Medical University, Nangang District, Haerbin, Heilongjiang, PRC
| | - T. Liu
- Shenzhen Kang Ning Hospital, Luohu District, Shenzhen, Guangdong, PRC
| | - X. Wang
- First Hospital of Hebei Medical University, Shijiazhuang, Hebei, PRC
| | - G. Miao
- Guangzhou Brain Hospital (Guangzhou Psychiatric Hospital), Liwan District, Guangzhou, Guangdong, PRC
| | - H. Meng
- No. 1 Hospital of Chongqing Medical University, Yuzhong District, Chongqing, PRC
| | - Y. Li
- Dalian No. 7 Hospital, Ganjingzi District, Dalian, Liaoning, PRC
| | - C. Hu
- No. 3 Hospital of Heilongjiang Province, Beian, Heilongjiang, PRC
| | - Y. Li
- Wuhan Mental Health Center, Wuhan, Hubei, PRC
| | - G. Huang
- Sichuan Mental Health Center, Mianyang, Sichuan, PRC
| | - G. Li
- Mental Health Institute of Jining Medical College, Dai Zhuang, Bei Jiao, Jining, Shandong, PRC
| | - B. Ha
- Liaocheng No. 4 Hospital, Liaocheng, Shandong, PRC
| | - H. Deng
- Mental Health Center of West China Hospital of Sichuan University, Wuhou District, Chengdu, Sichuan, PRC
| | - Q. Mei
- Suzhou Guangji Hospital, Suzhou, Jiangsu, PRC
| | - H. Zhong
- Anhui Mental Health Center, Hefei, Anhui, PRC
| | - S. Gao
- Ningbo Kang Ning Hospital, Zhenhai District, Ningbo, Zhejiang, PRC
| | - H. Sang
- Changchun Mental Hospital, Changchun, Jilin, PRC
| | - Y. Zhang
- No. 2 Hospital of Lanzhou University, Lanzhou, Gansu, PRC
| | - X. Fang
- Fuzhou Psychiatric Hospital, Cangshan District, Fuzhou, Fujian, PRC
| | - F. Yu
- Harbin No. 1 Special Hospital, Haerbin, Heilongjiang, PRC
| | - D. Yang
- Jining Psychiatric Hospital, North Dai Zhuang, Rencheng District, Jining, Shandong, PRC
| | - T. Liu
- No. 2 Xiangya Hospital of Zhongnan University, Furong District, Changsha, Hunan, PRC
| | - Y. Chen
- Xijing Hospital of No. 4 Military Medical University, Xian, Shaanxi, PRC
| | - X. Hong
- Mental Health Center of Shantou University, Shantou, Guangdong, PRC
| | - W. Wu
- Tongji University Hospital, Shanghai, PRC
| | - G. Chen
- Huaian No. 3 Hospital, Huaian, Jiangsu, PRC
| | - M. Cai
- Huzhou No. 3 Hospital, Huzhou, Zhejiang, PRC
| | - Y. Song
- Mudanjiang Psychiatric Hospital of Heilongjiang Province, Xinglong, Mudanjiang, Heilongjiang, PRC
| | - J. Pan
- No. 1 Hospital of Jinan University, Guangzhou, Guangdong, PRC
| | - J. Dong
- Qingdao Mental Health Center, Shibei District, Qingdao, Shandong, PRC
| | - R. Pan
- Guangxi Longquanshan Hospital, Yufeng District, Liuzhou, PRC
| | - W. Zhang
- Daqing No. 3 Hospital of Heilongjiang Province, Ranghulu District, Daqing, Heilongjiang, PRC
| | - Z. Shen
- Tangshan No. 5 Hospital, Lunan District, Tangshan, Hebei, PRC
| | - Z. Liu
- Anshan Psychiatric Rehabilitation Hospital, Lishan District, Anshan, Liaoning, PRC
| | - D. Gu
- Weihai Mental Health Center, ETDZ, Weihai, Shandong, PRC
| | - X. Wang
- Renmin Hospital of Wuhan University, Wuchang District, Wuhan, Hubei, PRC
| | - X. Liu
- Tianjin First Center Hospital, Hedong District, Tianjin, PRC
| | - Q. Zhang
- Hainan Anning Hospital, Haikou, Hainan, PRC
| | - J. Flint
- Wellcome Trust Centre for Human Genetics, Oxford, UK
| | - K. S. Kendler
- Virginia Institute for Psychiatric and Behavioral Genetics, Department of Psychiatry, Virginia Commonwealth University, Richmond, VA, USA
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Zhao Y, Hu J, Miao G, Qu L, Wang Z, Li G, Lv P, Ma D, Chen Y. Transmembrane protein 208: a novel ER-localized protein that regulates autophagy and ER stress. PLoS One 2013; 8:e64228. [PMID: 23691174 PMCID: PMC3653875 DOI: 10.1371/journal.pone.0064228] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2013] [Accepted: 04/11/2013] [Indexed: 12/11/2022] Open
Abstract
Autophagy and endoplasmic reticulum (ER) stress are both tightly regulated cellular processes that play central roles in various physiological and pathological conditions. Recent reports have indicated that ER stress is a potent inducer of autophagy. However, little is known about the underlying molecular link between the two processes. Here we report a novel human protein, transmembrane protein 208 (TMEM208) that can regulate both autophagy and ER stress. When overexpressed, TMEM208 impaired autophagy as characterized by the decrease of the accumulation of LC3-II, decreased degradation of autophagic substrates, and reduced expression of critical effectors and vital molecules of the ER stress and autophagy processes. In contrast, knockdown of the TMEM208 gene promoted autophagy, as demonstrated by the increase of LC3-II, increased degradation of autophagic substrates, and enhanced expression levels for genes key in the ER stress and autophagic processes. Taken together, our results reveal that this novel ER-located protein regulates both ER stress and autophagy, and represents a possible link between the two different cellular processes.
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Affiliation(s)
- Yuanbo Zhao
- Key Laboratory of Medical Immunology, Ministry of Health, Peking University Health Science Center, Beijing, China
- Center for Human Disease Genomics, Health Science Center, Peking University, Beijing, China
| | - Jia Hu
- Key Laboratory of Medical Immunology, Ministry of Health, Peking University Health Science Center, Beijing, China
- Center for Human Disease Genomics, Health Science Center, Peking University, Beijing, China
| | - Guangyan Miao
- Key Laboratory of Medical Immunology, Ministry of Health, Peking University Health Science Center, Beijing, China
- Center for Human Disease Genomics, Health Science Center, Peking University, Beijing, China
| | - Liujing Qu
- Key Laboratory of Medical Immunology, Ministry of Health, Peking University Health Science Center, Beijing, China
- Center for Human Disease Genomics, Health Science Center, Peking University, Beijing, China
| | - Zhenda Wang
- Key Laboratory of Medical Immunology, Ministry of Health, Peking University Health Science Center, Beijing, China
- Center for Human Disease Genomics, Health Science Center, Peking University, Beijing, China
| | - Ge Li
- Key Laboratory of Medical Immunology, Ministry of Health, Peking University Health Science Center, Beijing, China
- Center for Human Disease Genomics, Health Science Center, Peking University, Beijing, China
| | - Ping Lv
- Key Laboratory of Medical Immunology, Ministry of Health, Peking University Health Science Center, Beijing, China
- Center for Human Disease Genomics, Health Science Center, Peking University, Beijing, China
| | - Dalong Ma
- Key Laboratory of Medical Immunology, Ministry of Health, Peking University Health Science Center, Beijing, China
- Center for Human Disease Genomics, Health Science Center, Peking University, Beijing, China
| | - Yingyu Chen
- Key Laboratory of Medical Immunology, Ministry of Health, Peking University Health Science Center, Beijing, China
- Center for Human Disease Genomics, Health Science Center, Peking University, Beijing, China
- * E-mail:
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Xu J, Miao G, Zhao Y, Wei J. Subcutaneous Transplantation May Not Be an Appropriate Approach for the Islets Embedded in the Collagen Gel Scaffolds. Transplant Proc 2011; 43:3205-8. [DOI: 10.1016/j.transproceed.2011.09.058] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Zhao Y, Xu J, Wei J, Li J, Cai J, Miao G. Preservation of islet survival by upregulating α3 integrin signaling: the importance of 3-dimensional islet culture in basement membrane extract. Transplant Proc 2011; 42:4638-42. [PMID: 21168751 DOI: 10.1016/j.transproceed.2010.09.154] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2010] [Accepted: 09/30/2010] [Indexed: 10/18/2022]
Abstract
AIM Islet transplantation is a promising treatment to cure diabetes, but is associated with a high rate of early graft failure. The isolation process leads to the loss of the surrounding extracellular matrix, resulting in eventual islet disintegration and apoptosis. The purpose of this study was to determine the effects on the viability of isolated islets of embedding islets in reconstituted basement membrane extract (BME), which is similar to the normal peri-islet BM composition in vivo. METHODS Isolated mouse islets were embedded in BME gel for 24 or 48 hours. Expression of caspase-3, α3, and α5, focal adhesion kinase (FAK), phosphor-FAK, and pancreatic duodenal homeobox factor (PDX)-1 were detected with Western immunoblotting. RESULTS Impaired aggregation of single islet cells could only be observed in non-BME medium. Islets embedded in BME gel were partially protected from anoikis showed decreased caspase-3 compared with non-BME islets. We also observed an increase of α3 integrin, FAK protein level, and FAK activity. Furthermore, expression of PDX-1 was preserved at 48 hours, suggesting a positive contribution of BME to β-cell activity. CONCLUSION These results indicated that embedding islets in BME can upregulate α3 integrin, which may result in preservation of viability and function of isolated islets.
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Affiliation(s)
- Y Zhao
- The Key Laboratory of Geriatrics, Beijing Hospital & Beijing Institute of Geriatrics, Ministry of Health, Beijing, China
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18
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Shimada K, Ito T, Miao G, Tanemura M, Komoda H, Fumimoto Y, Kawamoto K, Nishida T, Kaneto H, Sawa Y. Regeneration of β Cells in the Native Pancreata After Syngeneic and Allogeneic Pancreas Transplantations in Spontaneously Type 2 Diabetic Torii Rats. Transplant Proc 2008; 40:438-40. [DOI: 10.1016/j.transproceed.2008.01.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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19
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Song J, Ito T, Matsuda C, Miao G, Tanemura M, Nishida T, Nozawa M, Matsuda H, Sawa Y. Inhibition of donor-derived T cells trafficking into target organs by FTY720 during acute graft-versus-host disease in small bowel transplantation. Clin Exp Immunol 2006; 146:85-92. [PMID: 16968402 PMCID: PMC1809734 DOI: 10.1111/j.1365-2249.2006.03175.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [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: 01/21/2023] Open
Abstract
In small bowel transplantation (SBTx), graft-versus-host disease (GVHD) is mediated by donor-derived T cells recognizing host major histocompatibility complex (MHC) alloantigens, and represents an important immunological event influencing life in experimental and clinical situations. We evaluated the possibility that a new sphingosine 1-phosphate receptor agonist, FTY720, could diminish GVHD in a rat SBTx model through traffic alteration of donor-derived T cells in target organs. Heterotopic SBTx was performed using a parent (WF)-into-F(1) (WF x ACI) rat combination. Recipient survival, body weight, histopathology, donor-derived T cell subpopulation and cytokine production were compared with untreated controls. FTY720 inhibited lethality and histopathological changes in target organs when administered at 0.5 mg/kg, possibly due to sequestration of donor-derived T cells in the intestinal graft. FTY720 caused a significant reduction in donor T cell numbers in target organs by promoting these cells to home into donor, but not recipient, secondary lymphoid tissues. FTY720 significantly decreased production of interferon (IFN)-gamma in target organs. These findings indicate that FTY720 effectively reduced recirculation of activated donor-derived T cells and recruitment to target organs in GVHD, and was also associated with down-regulated IFN-gamma production. These properties may offer the potential to treat ongoing GVHD in SBTx.
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Affiliation(s)
- J Song
- Department of Surgery (E1), Osaka University Graduate School of Medicine, Osaka, Japan
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20
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Miao G, Ostrowski RP, Mace J, Hough J, Hopper A, Peverini R, Chinnock R, Zhang J, Hathout E. Dynamic production of hypoxia-inducible factor-1alpha in early transplanted islets. Am J Transplant 2006; 6:2636-43. [PMID: 17049056 DOI: 10.1111/j.1600-6143.2006.01541.x] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.4] [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: 01/25/2023]
Abstract
More than half of transplanted beta-cells undergo apoptotic cell death triggered by nonimmunological factors within a few days after transplantation. To investigate the dynamic hypoxic responses in early transplanted islets, syngeneic islets were transplanted under the kidney capsule of balb/c mice. Hypoxia-inducible factor-1alpha (HIF-1alpha) was strongly expressed at post-transplant day (POD) 1, increased on POD 3, and gradually diminished on POD 14. Insulin secretion decreased on POD 3 in association with a significant increase of HIF-1alpha-related beta-cell death, which can be suppressed by short-term hyperbaric oxygen therapy. On POD 7, apoptosis was not further activated by continually produced HIF-1alpha. In contrast, improvement of nerve growth factor and duodenal homeobox factor-1 (PDx-1) production resulted in islet graft recovery and remodeling. In addition, significant activation of vascular endothelial growth factor in islet grafts on POD 7 correlated with development of massive newly formed microvessels, whose maturation is advanced on POD 14 with gradual diminution of HIF-1alpha. We conclude that (1) transplanted islets strongly express HIF-1alpha in association with beta-cell death and decreased insulin production until adequate revascularization is established and (2) early suppression of HIF-1alpha results in less beta-cell death thereby minimizing early graft failure.
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Affiliation(s)
- G Miao
- Islet Transplant Laboratory, Department of Pediatrics, Loma Linda University School of Medicine, Loma Linda, California, USA
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21
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Miao G, Pearcey R, Mackillop W. 197 The impact of adoption of concurrent, cisplatin-based chemo-radiotherapy on the outcome of cervical cancer in ontario: A population-based cohort study. Radiother Oncol 2006. [DOI: 10.1016/s0167-8140(06)80938-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Abstract
OBJECTIVE Development of the Edmonton protocol was a pivotal contribution to clinical islet transplantation (ITx). Persistent limitations to ITx include insufficient supply and posttransplant functional failure of islets. In this study, nerve growth factor (NGF) was used to enhance both cultured and transplanted beta-cell function, thus achieving prolonged graft survival. METHODS Fluorescence microscopy with ethidium bromide and SYTO green staining was used to evaluate balb/c mouse islet viability. Islets were syngeneically transplanted under the kidney capsule of recipients with streptozotocin-induced diabetes. Intraperitoneal glucose tolerance was used to test posttransplant function. RESULTS Improved viability was found in murine islets cultured for 48 hours in 500 ng/mL NGF (P < .05). A submarginal islet mass (260 islet equivalents/recipient) was used for ITx. The NGF-culture resulted in prolonged islet survival (24.7 days vs 5.5 days without NFG culture, n = 6). Intravenous injection of NGF (6 mug) on the day of transplant and postoperative days (POD) 1 + 2 prolonged islet survival from 4.1 days (no treatment) to 13.2 days (n = 6). Glucose tolerance testing performed at posttransplant day 4 showed improvement at 60 and 120 minutes in recipients treated intravenously with NGF (blood glucose of 95 +/- 15 vs 210 +/- 78 and 57 +/- 6 vs 176 +/- 70 mg/dL, respectively). CONCLUSION NGF may improve beta-cell function and result in prolonged survival of both cultured and transplanted islets.
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Affiliation(s)
- G Miao
- Department of Pediatrics, Loma Linda University, 11175 Campus Street, Loma Linda, CA 92354, USA
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23
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Keizer RS, Goennenwein STB, Klapwijk TM, Miao G, Xiao G, Gupta A. A spin triplet supercurrent through the half-metallic ferromagnet CrO2. Nature 2006; 439:825-7. [PMID: 16482152 DOI: 10.1038/nature04499] [Citation(s) in RCA: 123] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2005] [Accepted: 11/29/2005] [Indexed: 11/09/2022]
Abstract
In general, conventional superconductivity should not occur in a ferromagnet, though it has been seen in iron under pressure. Moreover, theory predicts that the current is always carried by pairs of electrons in a spin singlet state, so conventional superconductivity decays very rapidly when in contact with a ferromagnet, which normally prohibits the existence of singlet pairs. It has been predicted that this rapid spatial decay would not occur if spin triplet superconductivity could be induced in the ferromagnet. Here we report a Josephson supercurrent through the strong ferromagnet CrO2, from which we infer that it is a spin triplet supercurrent. Our experimental set-up is different from those envisaged in the earlier predictions, but we conclude that the underlying physical explanation for our result is a conversion from spin singlet pairs to spin triplets at the interface. The supercurrent can be switched with the direction of the magnetization, analogous to spin valve transistors, and therefore could enable magnetization-controlled Josephson junctions.
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Affiliation(s)
- R S Keizer
- Kavli Institute of NanoScience, Faculty of Applied Sciences, Delft University of Technology, 2628 CJ, Delft, The Netherlands.
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24
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Miao G, Ito T, Uchikoshi F, Tanemura M, Kawamoto K, Shimada K, Nozawa M, Matsuda H. Beneficial effects of pancreas transplantation: regeneration of pancreatic islets in the spontaneously diabetic Torii rat. Transplant Proc 2005; 37:226-8. [PMID: 15808602 DOI: 10.1016/j.transproceed.2005.01.006] [Citation(s) in RCA: 2] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
AIMS Type 2 diabetes is characterized by a combination of insulin resistance and pancreatic beta-cell dysfunction. Although pancreas transplantation (PTx) is mainly performed in patients with type 1 disease, both clinical and experimental data have demonstrated that PTx improves insulin sensitivity in type 2 diabetic recipients. However, it remains unclear whether PTx has the potential to induce islet neogenesis in a recipient's native pancreas. METHODS Nondiabetic 10-week-old and diabetic (defined as blood glucose level >250 mg/dL) 25-week-old (average onset age of diabetes) male spontaneously diabetic Torii (SDT; RT1(a)) rats served as donors and recipients, respectively. RESULTS In nontreated control SDT rats, beta-cell mass gradually decreased and blood glucose levels progressively increased (>600 mg/dL after 40 weeks of age). In PTx rats, however, the onset of diabetes was significantly delayed (>47.5 +/- 18.2 [graft age] versus 25.2 +/- 3.9 weeks in control rats). On immunohistochemical staining, insulin-secreting islets were observed in the naive pancreata of 40-week-old recipients with PTx (PTx40w), whereas no islets were found in 40-week-old control SDT rats. Moreover, the islets in the native pancreata of PTx40w recipients were located close to ductal structures, and PDX-1 (pancreatic duodenal homeobox-1)-positive cells were more clearly visible. These results indicate the possibility of beta-cell regeneration in the recipient native pancreas by avoiding glucose toxicity under normoglycemic condition achieved by PTx. CONCLUSIONS Pancreas transplantation has beneficial effects on impaired islet, inducing regeneration in the spontaneously diabetic Torii rat.
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Affiliation(s)
- G Miao
- Department of Surgery (E1), Osaka University Graduate School of Medicine, Suita, Osaka Japan
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25
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Miao G. Reference value of young people's erythrocyte sedimentation rate and altitude. J Med Eng Technol 2003; 27:19-22. [PMID: 12623608 DOI: 10.1080/0309190021000025846] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The purpose of this paper is to provide a scientific basis for a unified standard of the reference value of young people's erythrocyte sedimentation rate (ESR) in China. The reference values of healthy young people's ESR were collected according to the Wintrobe method, and the relationship between the reference value of young people's ESR and altitude was tested in this paper. It was found that the reference value of young people's ESR decreases when the altitude gradually increases, and the relationship is significant. The method of mathematical univariate regression analysis was used to deduce two regression equations: Y(1) = 10.92-0.00183X +/-2.59 and Y(2) = 18.58-0.00319X +/-4.37. If the altitude value of a particular area of China is known, the reference value of young people's ESR can be calculated by means of the regression equations. Furthermore, depending on the altitude, China can be divided into three districts: Qingzang, Central and Eastern districts.
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Affiliation(s)
- G Miao
- Shaanxi Normal University, Xi'an 710062, PR China.
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Miao G, Zhiyuan R, Qingsheng Y, Haiyan W. The relationship between reference value of old people's erythrocyte sedimentation rate and altitude. Clin Hemorheol Microcirc 2001; 24:155-9. [PMID: 11455054] [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: 02/20/2023]
Abstract
In order to provide a scientific basic for a unified standard of the reference value of old people's erythrocyte sedimentation rate (ESR) in China. The reference value of healthy old people's ESR was collected according to the Wintrobe method, the relationship between the reference value of old people's ESR and altitude was tested in this paper. It was found that the reference value of old people's ESR decreases when the altitude gradually increases, the relationship is quite significant. The method of mathematical univariate regression analysis was used to deduce two regression equations: Y1 = 16.38 - 0.00301X +/- 6.53, Y2 = 25.92 - 0.00438X +/- 10.25. If the altitude value of a particular area of China is known, the reference value of old people's ESR can be calculated by means of the regression equations. Furthermore, depending on the altitude, China can be divided into three districts: Qingzang Districts, Central Districts and Eastern Districts.
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Affiliation(s)
- G Miao
- Department of Geography, Shaanxi Normal University, Xi' an, PR China.
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Abstract
In order to provide a scientific basis for a unified standard of the reference value of erythrocyte sedimentation rate (ESR) in China, the reference value of healthy people's ESR has been collected. The relationship between the reference value of ESR and geographical factors is examined in this paper. Altitude is the most important factor affecting the reference value of ESR, which decreases with increasing altitude; the relationship is quite significant. The method of stepwise regression analysis was used to deduce two regression equations: Y1 = 12.08 - 0.00222X1 + 0.00114X5 +/- 2.95, Y2 = 18.81 - 0.00323X1 + 0.239X4 +/- 4.70. If the geographical factor value of a particular area in China is known, the reference value of ESR of Chinese people can be calculated by means of the regression equations. Furthermore, the dependence on geographical factors in China can be classified as six districts: Qingzang, Southwest, Northwest, Southeast, North and Northeast.
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Affiliation(s)
- G Miao
- Shaanxi Normal University, Xi'an, PR China.
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29
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Miao G, Sui L, Wei R. Dissipative properties and scaling law for a layer of granular material on a vibrating plate. Phys Rev E Stat Nonlin Soft Matter Phys 2001; 63:031304. [PMID: 11308646 DOI: 10.1103/physreve.63.031304] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2000] [Indexed: 05/23/2023]
Abstract
The dissipative properties and scaling law for a layer of vertically vibrated granular materials were investigated by means of a dynamical model of a single sphere colliding completely inelastically with a massive, oscillating plate. A relationship is presented of how the temperature of the layer scales with the acceleration of the plate and the restitution coefficient of the grains. The numerical calculation shows the existence of an "energy well" and a "temperature well," which could be used to explain the existence of a f/2 flat (where f is the external driving frequency) state in an experiment on vibrated granular material.
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Affiliation(s)
- G Miao
- State Key Laboratory of Modern Acoustics and Institute of Acoustics, Nanjing University, Nanjing 210093, Peoples Repubic of China
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Yin J, Zhou N, Gao Z, Yang W, Miao G. [Rational range and optimum proportion of energy input in farmland]. Ying Yong Sheng Tai Xue Bao 2000; 11:223-7. [PMID: 11767600] [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: 02/23/2023]
Abstract
There exists a rational range of artificial supplemental energy inputs in fields. In the range, the inputs can improve the yield and the output/input ratio. The rational range of energy input in total energy output is bigger than that in the output/input ratio. It is bigger in low yield fields than high yield fields, which suggests that increasing artificial supplemental energy input can increase the production of low yield fields as same as high yield fields. In the rational range of energy input, there exist high efficient lines in water and fertilizer inputs. The highest efficiency occurs when the rational inputs of water and fertilizer occur in these two lines. There also exist optimum lines of energy and economy input proportions. In the two lines, the proportions of energy and economy output/input of water and fertilizer inputs are the highest, which are the optimum of water and fertilizer inputs. Water and fertilizer may replace each other for equal yields, but would result in a decrease in the output/input ratio.
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Affiliation(s)
- J Yin
- Shanxi Agricultural University, Taigu 030801
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31
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Miao G, Yan Y, Zhiyuan R, Cailing G, Jinfu M, Ping H. The relationship between normal erythrocyte sedimentation rate of Chinese young people and geographical factors. Clin Hemorheol Microcirc 1999; 20:151-7. [PMID: 10463838] [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: 02/13/2023]
Abstract
In order to provide a scientific basis for the layout of a unified standard of the reference value of Chinese young people's erythrocyte sedimentation rate (ESR), the relationship between the reference values of the Chinese healthy young's ESR and five geographical factors was tested according to the Wintrobe methods. The altitude was found to be the most important factor affecting the reference value of the Chinese young's ESR. The altitude increase correlates with the decrease of the reference value of the young's ESR. The method of stepwise regression analysis was used to deduce two multivariate regression equations. If the geographical index values of a particular area of China are known, the reference value of the young's ESR of this region can be calculated by means of the regression equations. Furthermore, the depending on geographical factors, China can be divided into six districts: Qingzang, Southwest, Northwest, Southeast, North and Northeast District, according to the reference values of the Chinese young's ESR.
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Affiliation(s)
- G Miao
- Shaanxi Normal University, Xián, P.R. China
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Mallakin A, McConkey BJ, Miao G, McKibben B, Snieckus V, Dixon DG, Greenberg BM. Impacts of structural photomodification on the toxicity of environmental contaminants: anthracene photooxidation products. Ecotoxicol Environ Saf 1999; 43:204-212. [PMID: 10375423 DOI: 10.1006/eesa.1999.1764] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.0] [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
The toxicity of polycyclic aromatic hydrocarbons (PHAs) is known to be enhanced by light via photosensitization reactions (production of active oxygen) and photomodification of the chemicals (e.g., oxidation) to more toxic compounds. Anthracene (ANT) toxicity in particular has been found to increase dramatically following photomodification. The objective of this study was to identify the photooxidation products of ANT and assess the toxicity of selected photoproducts. High performance liquid chromatography (HPLC) analysis of anthracene photooxidation revealed a complex array of oxidation products; prevalent among these were anthraquinone (ATQ) and hydroxy-anthraquinones (hATQs). Eleven of these compounds were tested for toxicity using growth inhibition of the duckweed Lemna gibba L. G-3. All but one of the compounds tested were found to be toxic, and when UV radiation was present in the light source toxicity was generally enhanced. The chemicals were also irradiated under SSR prior to toxicity testing. In about half the cases, the ATQ compounds were rapidly photooxidized and the resultant photoproducts were more toxic than the parent compounds. Interestingly, 2-hydroxyanthraquinone, which was not subject to photooxidation, was the most toxic of the compounds tested. As a light stable compound it presents the risk of a persistent environmental hazard.
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Affiliation(s)
- A Mallakin
- Department of Biology, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada
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Miao G, Yan Y, Chuanmin Z, Naiying L. Discussion on the relationship between normal hematocrit and geographical factors in China. Clin Hemorheol Microcirc 1997; 17:459-65. [PMID: 9502530] [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: 02/06/2023]
Abstract
This paper is written in order to provide a scientific basis for laying out an unified standard of the reference value of hematocrit of Chinese healthy people. It studies the relationship between the reference values of Chinese adults' hematocrit, tested according to the Wintrobe Laws and five geographical factors. It is found that the altitude is the most important factor affecting the reference value of Chinese healthy people's hematocrit. As the altitude gradually increases, the reference value of their hematocrit also increases. By using the method of stepwise regression analysis, two multivariate regression equations are deduced. If the geographical index values in a particular area are known, the reference value of Chinese healthy people's hematocrit in this area can be established by means of the regression equations. Furthermore, according to the dependent relationship of the reference value of Chinese healthy people's hematocrit to geographical factors, China can be divided into six districts: Qingzang, Southwest, Northwest, Southeast, North and Northeast district.
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Affiliation(s)
- G Miao
- Shaanxi Teachers University, Xi'an, PR China
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Huang C, Miao G, Wu Z, Liu J, Yu G. External use of bi yuan ning in 200 cases of nasosinusitis and rhinitis. J TRADIT CHIN MED 1996; 16:105-7. [PMID: 9389134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- C Huang
- Rugao TCM Hospital, Jiangsu Province
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Abstract
The DNA binding activity of Fos and Jun is regulated in vitro by a post-translational mechanism involving reduction-oxidation. Redox regulation occurs through a conserved cysteine residue located in the DNA binding domain of Fos and Jun. Reduction of this residue by chemical reducing agents or by a ubiquitous nuclear redox factor (Ref-1) recently purified from Hela cells, stimulates AP-1 DNA binding activity in vitro, whereas oxidation or chemical modification of the cysteine has an inhibitory effect on DNA binding activity. Here we demonstrate that the protein product of the ref-1 gene stimulates the DNA binding activity of Fos-Jun heterodimers, Jun-Jun homodimers and Hela cell AP-1 proteins as well as that of several other transcription factors including NF-kappa B, Myb and members of the ATF/CREB family. Furthermore, immunodepletion analysis indicates that Ref-1 is the major AP-1 redox activity in Hela nuclear extracts. Interestingly, Ref-1 is a bifunctional protein; it also possesses an apurinic/apyrimidinic (AP) endonuclease DNA repair activity. However, the redox and DNA repair activities of Ref-1 can, in part, be distinguished biochemically. This study suggests a novel link between transcription factor regulation, oxidative signalling and DNA repair processes in higher eukaryotes.
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Affiliation(s)
- S Xanthoudakis
- Department of Molecular Oncology and Virology, Roche Institute of Molecular Biology, New York, NY
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