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Zhao J, Rui L, Ouyang W, Hao Y, Liu Y, Tang J, Ding Z, Teng Z, Liu X, Zhu H, Ding Z. Cardiac commitment driven by MyoD expression in pericardial stem cells. Front Cell Dev Biol 2024; 12:1369091. [PMID: 38601082 PMCID: PMC11004306 DOI: 10.3389/fcell.2024.1369091] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Accepted: 02/27/2024] [Indexed: 04/12/2024] Open
Abstract
Cellular therapy holds immense promise to remuscularize the damaged myocardium but is practically hindered by limited allogeneic sources of cardiac-committed cells that engraft stably in the recipient heart after transplantation. Here, we demonstrate that the pericardial tissue harbors myogenic stem cells (pSCs) that are activated in response to inflammatory signaling after myocardial infarction (MI). The pSCs derived from the MI rats (MI-pSCs) show in vivo and in vitro cardiac commitment characterized by cardiac-specific Tnnt2 expression and formation of rhythmic contraction in culture. Bulk RNA-seq analysis reveals significant upregulation of a panel of genes related to cardiac/myogenic differentiation, paracrine factors, and extracellular matrix in the activated pSCs compared to the control pSCs (Sham-pSCs). Notably, we define MyoD as a key factor that governs the process of cardiac commitment, as siRNA-mediated MyoD gene silencing results in a significant reduction of myogenic potential. Injection of the cardiac-committed cells into the infarcted rat heart leads to long-term survival and stable engraftment in the recipient myocardium. Therefore, these findings point to pericardial myogenic progenitors as an attractive candidate for cardiac cell-based therapy to remuscularize the damaged myocardium.
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Affiliation(s)
- Jianfeng Zhao
- Department of Cardiology, The People’s Hospital of Danyang Affiliated to Nantong University, Danyang, China
| | - Limei Rui
- Department of Cardiology, The People’s Hospital of Danyang Affiliated to Nantong University, Danyang, China
| | - Weili Ouyang
- Department of Cardiology, The People’s Hospital of Danyang Affiliated to Nantong University, Danyang, China
| | - Yingcai Hao
- Department of Cardiology, The People’s Hospital of Danyang Affiliated to Nantong University, Danyang, China
| | - Yusong Liu
- Department of Cardiology, The People’s Hospital of Danyang Affiliated to Nantong University, Danyang, China
| | - Jianfeng Tang
- Department of Cardiology, The People’s Hospital of Danyang Affiliated to Nantong University, Danyang, China
| | - Zheheng Ding
- Institute of Biochemistry and Molecular Biology II, Heinrich-Heine University of Düsseldorf, Düsseldorf, Germany
| | - Zenghui Teng
- Institute Neuro and Sensory Physiology, Heinrich-Heine University of Düsseldorf, Düsseldorf, Germany
| | - Xueqing Liu
- Department of Cardiology, The People’s Hospital of Danyang Affiliated to Nantong University, Danyang, China
| | - Hongtao Zhu
- Department of Cardiology, The People’s Hospital of Danyang Affiliated to Nantong University, Danyang, China
| | - Zhaoping Ding
- Institute of Molecular Cardiology, Heinrich-Heine University of Düsseldorf, Düsseldorf, Germany
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Teng Z. Novel Development and Prospects in Pathogenesis, Diagnosis, and Therapy of Alzheimer's Disease. J Alzheimers Dis Rep 2024; 8:345-354. [PMID: 38405339 PMCID: PMC10894614 DOI: 10.3233/adr-230130] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Accepted: 12/29/2023] [Indexed: 02/27/2024] Open
Abstract
Alzheimer's disease (AD) is the most prevalent neurodegenerative disease with cognitive decline and behavioral dysfunction. AD will become a global public health concern due to its increasing prevalence brought on by the severity of global aging. It is critical to understand the pathogenic mechanisms of AD and investigate or pursue a viable therapy strategy in clinic. Amyloid-β (Aβ) accumulation and abnormally hyperphosphorylated tau protein are the main regulating variables in the pathological phase of AD. And neuroinflammation brought on by activated microglia was found to be one risk factor contributing to changes in Aβ and tau pathology. It is important to investigate the unique biomarkers of early diagnosis and advanced stage, which may help to elucidate the specific pathological process of AD and provide potential novel therapeutic targets or preventative measures.
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Affiliation(s)
- Zenghui Teng
- Medical Faculty, Institute of Neuro- and Sensory Physiology, Heinrich-Heine-University Düsseldorf, Germany
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3
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Zhu H, Liu X, Ouyang W, Hao Y, Ding Z, Tan K, Tang J, Zhao J, Ding X, Teng Z, Deng X, Wu W, Ding Z. Sfrp1 as a Pivotal Paracrine Factor in the Trained Pericardial Stem Cells that Foster Reparative Activity. Stem Cells Transl Med 2024; 13:137-150. [PMID: 37936560 PMCID: PMC10872698 DOI: 10.1093/stcltm/szad075] [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: 03/17/2023] [Accepted: 09/25/2023] [Indexed: 11/09/2023] Open
Abstract
Tissue damage often induces local inflammation that in turn dictates a series of subsequential responses, such as stem cell activation and growth, to maintain tissue homeostasis. The aim of the study is to testify the possibility of using inflammation-trained stem cells as optimal donor cells to augment the efficacy of cell therapy. The pericardial stem/stromal cells derived from the animals after myocardial infarction (MI-pSC) showed an enhanced myogenic potential and augmented reparative activity after transplantation in the injured hearts, as compared to the Sham-pSC. Bulk RNA-Seq analysis revealed significant upregulation of a panel of myogenic and trophic genes in the MI-pSC and, notably, Sfrp1 as an important anti-apoptotic factor induced robustly in the MI-pSC. Injection of the MI-pSC yielded measurable numbers of surviving cardiomyocytes (Tunel and Casp-3 negative) within the infarct area, but the effects were significantly diminished by siRNA-based silence of Sfrp1 gene in the pSC. Primed Sham-pSC with pericardial fluid from MI rats mimicked the upregulation of Sfrp1 and enhanced myogenic potential and reparative activity of pSC. Taken together, our results illustrated the inflammation-trained pSC favor a reparative activity through upregulation of Sfrp1 gene that confers anti-apoptotic activity in the injured cardiomyocytes. Therefore, the active form of stem cells may be used as a cardiac protective agent to boost therapeutical potential of stem cells.
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Affiliation(s)
- Hongtao Zhu
- Department of Cardiology, The People’s Hospital of Danyang affiliated to Nantong University, 212300 Danyang, People’s Republic of China
| | - Xueqing Liu
- Department of Cardiology, The People’s Hospital of Danyang affiliated to Nantong University, 212300 Danyang, People’s Republic of China
| | - Weili Ouyang
- Department of Cardiology, The People’s Hospital of Danyang affiliated to Nantong University, 212300 Danyang, People’s Republic of China
| | - Yingcai Hao
- Department of Cardiology, The People’s Hospital of Danyang affiliated to Nantong University, 212300 Danyang, People’s Republic of China
| | - Zheheng Ding
- Institute of Biochemistry and Molecular Biology II, Heinrich-Heine-University of Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf, Germany
| | - Kezhe Tan
- Department of General Surgery, Shanghai Children’s Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, People’s Republic of China
| | - Jianfeng Tang
- Department of Cardiology, The People’s Hospital of Danyang affiliated to Nantong University, 212300 Danyang, People’s Republic of China
| | - Jianfeng Zhao
- Department of Cardiology, The People’s Hospital of Danyang affiliated to Nantong University, 212300 Danyang, People’s Republic of China
| | - Xiaojun Ding
- Department of Cardiology, The People’s Hospital of Danyang affiliated to Nantong University, 212300 Danyang, People’s Republic of China
| | - Zenghui Teng
- Institute of Neuro and Sensory Physiology, Heinrich-Heine University of Düsseldorf, 40225 Düsseldorf, Germany
| | - Xiaoming Deng
- Department of Anesthesiology, Changhai Hospital, Naval Medical University, Shanghai, People’s Republic of China
| | - Weidong Wu
- Department of Anesthesiology, The People’s Hospital of Danyang affiliated to Nantong University, 212300 Danyang, People’s Republic of China
| | - Zhaoping Ding
- Institute of Molecular Cardiology, Heinrich-Heine University of Düsseldorf, 40225 Düsseldorf, Germany
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Qiu Q, Wu HY, Shi HL, Pan H, Jiang CY, Teng Z, Liu JJ, Zheng YX, Chen J. [Analysis of parainfluenza virus infection in acute respiratory tract infection adult cases in Shanghai, 2015-2021]. Zhonghua Liu Xing Bing Xue Za Zhi 2023; 44:1628-1633. [PMID: 37875452 DOI: 10.3760/cma.j.cn112338-20230404-00210] [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: 10/26/2023]
Abstract
Objective: To study the infection status and epidemiological characteristics of parainfluenza virus (PIV) in acute respiratory tract infection adult cases in Shanghai from 2015 to 2021, and to provide a scientific basis for preventing and controlling PIV. Methods: Acute respiratory tract infections were collected from 13 hospitals in Shanghai from 2015 to 2021. Relevant information was registered, and respiratory specimens were sampled to detect respiratory pathogens by multiplex PCR. Results: A total of 5 104 adult acute respiratory tract infection cases were included; the overall positive rate of the respiratory pathogens was 29.37% (1 499/5 104). The positive rate of PIV was 2.61% (133/5 104), compared with 2.32% (55/2 369) and 2.85% (78/2 735) in influenza-like cases (ILI) and severe acute respiratory infection (SARI) cases, respectively. Among them, PIV3 accounted for the highest proportion (62.41%, 83/133), followed by PIV1 (18.80%, 25/133), PIV2 (9.77%, 13/133), and PIV4 (9.02%, 12/133). The incidence of PIV-positive cases was mainly distributed in the first and second quarters, accounting for 62.41% (83/133). The difference in the incidence in each quarter was significant (χ2=24.78, P<0.001). Mixed infection accounted for 18.80% (25/133) of 133 PIV-positive cases, the mixed infection rates of ILI and SARI were 18.18% (10/55) and 19.23% (15/78), respectively, and the main mixed pathogen of PIV was coronavirus 229E. Conclusions: There are a certain proportion of PIV-positive acute respiratory tract infection cases in Shanghai. It is necessary to strengthen the etiological surveillance in acute respiratory tract infection cases, especially the mixed infection of PIV and other pathogens.
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Affiliation(s)
- Q Qiu
- Institute of Infectious Disease Prevention and Control, Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - H Y Wu
- Institute of Infectious Disease Prevention and Control, Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - H L Shi
- Institute of Infectious Disease Prevention and Control, Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - H Pan
- Institute of Infectious Disease Prevention and Control, Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - C Y Jiang
- Institute of Infectious Disease Prevention and Control, Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - Z Teng
- Department of Microbiology, Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - J J Liu
- Department of Microbiology, Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - Y X Zheng
- Institute of Infectious Disease Prevention and Control, Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - J Chen
- Shanghai Institute of Preventive Medicine, Shanghai 200336, China
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5
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Cao W, Pirozzi CJ, Song J, Teng Z. Editorial: Neurovascular changes in neuroinflammatory diseases. Front Cell Neurosci 2022; 16:1075719. [PMID: 36385952 PMCID: PMC9664209 DOI: 10.3389/fncel.2022.1075719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Accepted: 10/24/2022] [Indexed: 11/06/2022] Open
Affiliation(s)
- Weidong Cao
- Department of Neurosurgery, The First Medical Centre, Chinese PLA General Hospital, Beijing, China
| | - Christopher J. Pirozzi
- The Preston Robert Tisch Brain Tumor Center, Duke University Medical Center, Durham, NC, United States
| | - Jian Song
- Institute of Physiological Chemistry and Pathobiochemistry, Cells-in-Motion Cluster of Excellence, University of Münster, Münster, Germany
- *Correspondence: Jian Song
| | - Zenghui Teng
- Medical Faculty, Institute of Neuro- and Sensory Physiology, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
- Zenghui Teng
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6
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Gu ZS, Huang Y, Costopoulos C, Jessney B, Bourantas C, Teng Z, Maehara A, Raber L, Stone G, Bennett MR. Heterogeneous plaque geometry is associated with major adverse cardiovascular events. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1208] [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: 11/15/2022] Open
Abstract
Abstract
Objectives
To determine whether coronary artery plaque-lumen geometry predicts major adverse cardiovascular events (MACE), and incorporating geometric measures enhances risk stratification from intravascular imaging.
Background
Prospective studies show that only a minority of plaques with higher-risk features result in future MACE, indicating the need for more predictive markers of plaque vulnerability. Plaques show heterogeneous structures and plaque-lumen geometry, both of which can promote high plaque structural stress (PSS); however, the relationships between geometric heterogeneity and MACE or PSS are unknown.
Methods
We examined plaque-lumen curvature, irregularity, lumen aspect ratio (LAR), roughness, PSS and their longitudinal heterogeneity (Figure 1A) in 35 non-culprit lesions (NCL) associated with MACE and 66 propensity-matched no-MACE NCL from the PROSPECT (Providing Regional Observations to Study Predictors of Events in the Coronary Tree) study. Causes of heterogeneous geometry and PSS were examined using a separate group of co-registered virtual histology-intravascular ultrasound (VH-IVUS) and optical coherence tomography (OCT) images (n=53 plaques).
Results
Plaque geometry heterogeneity indices (HI) were increased in NCL MACE vs. no-MACE lesions across the whole plaque and peri-minimal luminal area (MLA) segments (HI curvature: p=0.002; HI irregularity: p<0.001; HI LAR: p=0.001; HI roughness: p=0.002). Peri-MLA HI roughness was an independent predictor of future MACE (hazard ratio: 3.69, p<0.001) (Figure 1B). Inclusion of HI roughness improved identification of NCLs leading to MACE in VH-defined thin-cap fibroatheromas (VH-TCFA, p=0.005), MLA ≤4mm2 (p=0.001), and plaque burden (PB) ≥70% (p<0.001) (Figure 1C–E), and further improved the ability of PSS to identify MACE NCLs in VH-TCFA (p=0.041), MLA ≤4mm2 (p=0.033), and PB ≥70% (p<0.001). HI roughness generally corresponded with HI PSS, but was also increased at sites of local calcification and multilayering.
Conclusions
Plaque-lumen geometric heterogeneity is increased across whole plaque and peri-MLA segments of NCLs causing MACE. Inclusion of geometric heterogeneity may improve the ability of intravascular imaging to predict MACE.
Funding Acknowledgement
Type of funding sources: Other. Main funding source(s): British Heart Foundation
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Affiliation(s)
- Z S Gu
- University of Cambridge , Cambridge , United Kingdom
| | - Y Huang
- University of Cambridge , Cambridge , United Kingdom
| | - C Costopoulos
- Royal Papworth Hospital , Cambridge , United Kingdom
| | - B Jessney
- University of Cambridge , Cambridge , United Kingdom
| | - C Bourantas
- Barts Heart Centre , London , United Kingdom
| | - Z Teng
- University of Cambridge , Cambridge , United Kingdom
| | - A Maehara
- Cardiovascular Research Foundation , New York , United States of America
| | - L Raber
- Bern University Hospital, Inselspital , Bern , Switzerland
| | - G Stone
- Cardiovascular Research Foundation , New York , United States of America
| | - M R Bennett
- University of Cambridge , Cambridge , United Kingdom
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Teng Z, Gottmann K. Hemisynapse Formation Between Target Astrocytes and Cortical Neuron Axons in vitro. Front Mol Neurosci 2022; 15:829506. [PMID: 35386271 PMCID: PMC8978633 DOI: 10.3389/fnmol.2022.829506] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 12/05/2021] [Accepted: 02/08/2022] [Indexed: 01/28/2023] Open
Abstract
One of the most fundamental organizing principles in the mammalian brain is that neurons do not establish synapses with the other major cell type, the astrocytes. However, induced synapse formation between neurons and astrocytes appears conceivable, because astrocytes are well known to express functional ionotropic glutamate receptors. Here, we attempted to trigger synapse formation between co-cultured neurons and astrocytes by overexpressing the strongly synaptogenic adhesion protein LRRTM2 in astrocytes physically contacted by cortical axons. Interestingly, control experiments with immature cortical astrocytes without any overexpression resulted in the induction of synaptic vesicle clustering in contacting axons (hemisynapse formation). This synaptogenic activity correlated with the endogenous expression of the synaptogenic protein Neuroligin1. Hemisynapse formation was further enhanced upon overexpression of LRRTM2 in cortical astrocytes. In contrast, cerebellar astrocytes required overexpression of LRRTM2 for induction of synaptic vesicle clustering in contacting axons. We further addressed, whether hemisynapse formation was accompanied by the appearance of fully functional glutamatergic synapses. We therefore attempted to record AMPA receptor-mediated miniature excitatory postsynaptic currents (mEPSCs) in innervated astrocytes using the whole-cell patch-clamp technique. Despite the endogenous expression of the AMPA receptor subunits GluA2 and to a lesser extent GluA1, we did not reliably observe spontaneous AMPA mEPSCs. In conclusion, overexpression of the synaptogenic protein LRRTM2 induced hemisynapse formation between co-cultured neurons and astrocytes. However, the formation of fully functional synapses appeared to require additional factors critical for nano-alignment of presynaptic vesicles and postsynaptic receptors.
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Wang Z, Liu L, Pang F, Zheng Z, Teng Z, Miao T, Fu T, Rushdi HE, Yang L, Gao T, Lin F, Liu S. Novel insights into heat tolerance using metabolomic and high-throughput sequencing analysis in dairy cows rumen fluid. Animal 2022; 16:100478. [PMID: 35247705 DOI: 10.1016/j.animal.2022.100478] [Citation(s) in RCA: 4] [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: 09/21/2021] [Revised: 01/29/2022] [Accepted: 01/31/2022] [Indexed: 01/10/2023] Open
Abstract
Heat stress influences rumen fermentative processes with effects on the physiology and production of dairy cows. However, the underlying relationship between rumen microbiota and its associated metabolism with heat tolerance in cows have not been extensively described yet. Therefore, the main objective of this study was to investigate differential heat resistance in Holstein cows using rumen bacterial and metabolome analyses. We performed both principal component analysis and membership function analysis to select seven heat-tolerant (HT) and seven heat-sensitive (HS) cows. Under heat stress conditions, the HT cows had a significantly (P < 0.05) higher propionic acid content than the HS cows; while measures of the respiratory rate, acetic, and butyric acid in the HT cows were significantly (P < 0.05) lower compared with the HS cows. Also, the HT cows showed lower (P < 0.01) rectal temperature and acetic acid to propionic acid ratio than the HS group of cows. Omics sequencing revealed that the relative abundances of Muribaculaceae, Rikenellaceae, Acidaminococcaceae, Christensenellaceae, Rikenellaceae_RC9_gut_group, Succiniclasticum, Ruminococcaceae_NK4A214_group and Christensenellaceae_R-7_group were significantly (P < 0.01) higher in the HT cows; whereas Prevotellaceae, Prevotella_1, Ruminococcaceae_UCG-014, and Shuttleworthia were significantly (P < 0.01) lower in HT cows compared to HS cows. Substances mainly involved in carbohydrate metabolism, including glycerol, mannitol, and maltose, showed significantly higher content in the HT cows (P < 0.05) compared to that in the HS cows. Simultaneously, distinct metabolites were significantly correlated with differential bacteria, suggesting that glycerol, mannitol, and maltose could serve as potential biomarkers for determining heat resistance that require further study. Overall, distinct changes in the rumen microbiota and metabolomics in the HT cows may be associated with a better adaptability to heat stress. These findings suggest their use as diagnostic tools of heat tolerance in dairy cattle breeding schemes.
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Affiliation(s)
- Z Wang
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, Henan, People's Republic of China
| | - L Liu
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, Henan, People's Republic of China
| | - F Pang
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, Henan, People's Republic of China
| | - Z Zheng
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, Henan, People's Republic of China
| | - Z Teng
- College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang, People's Republic of China
| | - T Miao
- Henan Huahua Niu Dairy Co., Ltd, Zhengzhou, People's Republic of China
| | - T Fu
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, Henan, People's Republic of China
| | - H E Rushdi
- Department of Animal Production, Faculty of Agriculture, Cairo University, 12613 Giza, Egypt
| | - L Yang
- College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, People's Republic of China
| | - T Gao
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, Henan, People's Republic of China
| | - F Lin
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, Henan, People's Republic of China
| | - S Liu
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, Henan, People's Republic of China.
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Zhu H, Liu X, Ding Y, Tan K, Ni W, Ouyang W, Tang J, Ding X, Zhao J, Hao Y, Teng Z, Deng X, Ding Z. IL-6 coaxes cellular dedifferentiation as a pro-regenerative intermediate that contributes to pericardial ADSC-induced cardiac repair. Stem Cell Res Ther 2022; 13:44. [PMID: 35101092 PMCID: PMC8802508 DOI: 10.1186/s13287-021-02675-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Accepted: 12/06/2021] [Indexed: 12/18/2022] Open
Abstract
Background Cellular dedifferentiation is a regenerative prerequisite that warrants cell cycle reentry and appropriate mitotic division during de novo formation of cardiomyocytes. In the light of our previous finding that expression of injury-responsive element, Wilms Tumor factor 1 (WT1), in pericardial adipose stromal cells (ADSC) conferred a compelling reparative activity with concomitant IL-6 upregulation, we then aim to unravel the mechanistic network that governs the process of regenerative dedifferentiation after ADSC-based therapy. Methods and results WT1-expressing ADSC (eGFP:WT1) were irreversibly labeled in transgenic mice (WT1-iCre/Gt(ROSA)26Sor-eGFP) primed with myocardial infarction. EGFP:WT1 cells were enzymatically isolated from the pericardial adipose tissue and cytometrically purified (ADSCgfp+). Bulk RNA-seq revealed upregulation of cardiac-related genes and trophic factors in ADSCgfp+ subset, of which IL-6 was most abundant as compared to non-WT1 ADSC (ADSCgfp−). Injection of ADSCgfp+ subset into the infarcted hearts yielded striking structural repair and functional improvement in comparison to ADSCgfp− subset. Notably, ADSCgfp+ injection triggered significant quantity of dedifferentiated cardiomyocytes recognized as round-sharp, marginalization of sarcomeric proteins, expression of molecular signature of non-myogenic genes (Vimentin, RunX1), and proliferative markers (Ki-67, Aurora B and pH3). In the cultured neonatal cardiomyocytes, spontaneous dedifferentiation was accelerated by adding tissue extracts from the ADSC-treated hearts, which was neutralized by IL-6 antibody. Genetical lack of IL-6 in ADSC dampened cardiac dedifferentiation and reparative activity. Conclusions Taken collectively, our results revealed a previous unappreciated effect of IL-6 on cardiac dedifferentiation and regeneration. The finding, therefore, fulfills the promise of stem cell therapy and may represent an innovative strategy in the treatment of ischemic heart disease. Supplementary Information The online version contains supplementary material available at 10.1186/s13287-021-02675-1.
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Affiliation(s)
- Hongtao Zhu
- Department of Cardiology, The People's Hospital of Danyang, Affiliated Danyang Hospital of Nantong University, West Xinmin Rd. 2, Danyang, 212300, China
| | - Xueqing Liu
- Department of Cardiology, The People's Hospital of Danyang, Affiliated Danyang Hospital of Nantong University, West Xinmin Rd. 2, Danyang, 212300, China
| | - Yuan Ding
- Department of Clinical Laboratory, Danyang Hospital for Chinese Traditional Medicine, Danyang, 212300, China
| | - Kezhe Tan
- Department of Anesthesiology and Critical Care, Changhai Hospital, Navy Medical University, Changhai Road 168, Shanghai, 200433, China
| | - Wen Ni
- Department of Anesthesiology and Critical Care, Changhai Hospital, Navy Medical University, Changhai Road 168, Shanghai, 200433, China
| | - Weili Ouyang
- Department of Cardiology, The People's Hospital of Danyang, Affiliated Danyang Hospital of Nantong University, West Xinmin Rd. 2, Danyang, 212300, China
| | - Jianfeng Tang
- Department of Cardiology, The People's Hospital of Danyang, Affiliated Danyang Hospital of Nantong University, West Xinmin Rd. 2, Danyang, 212300, China
| | - Xiaojun Ding
- Department of Cardiology, The People's Hospital of Danyang, Affiliated Danyang Hospital of Nantong University, West Xinmin Rd. 2, Danyang, 212300, China
| | - Jianfeng Zhao
- Department of Cardiology, The People's Hospital of Danyang, Affiliated Danyang Hospital of Nantong University, West Xinmin Rd. 2, Danyang, 212300, China
| | - Yingcai Hao
- Department of Cardiology, The People's Hospital of Danyang, Affiliated Danyang Hospital of Nantong University, West Xinmin Rd. 2, Danyang, 212300, China
| | - Zenghui Teng
- Institute of Neuro and Sensory Physiology, Heinrich-Heine University of Düsseldorf, Moorenstr. 5, 40225, Düsseldorf, Germany
| | - Xiaoming Deng
- Department of Anesthesiology and Critical Care, Changhai Hospital, Navy Medical University, Changhai Road 168, Shanghai, 200433, China.
| | - Zhaoping Ding
- Institute of Molecular Cardiology, Heinrich-Heine University of Düsseldorf, Moorenstr. 5, 40225, Düsseldorf, Germany.
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Wang L, Chen X, Han L, Jin B, Han W, Jia J, Bai X, Teng Z. EPIGENETIC FACTORS OF SERUM URIC ACID LEVEL AND RELATED GENE POLYMORPHISMS IN SHENYANG, CHINA. Acta Endocrinol (Buchar) 2022; 18:1-12. [PMID: 35975251 PMCID: PMC9365425 DOI: 10.4183/aeb.2022.1] [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] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
BACKGROUND The purpose of this study was to explore the influencing factors of serum uric acid (SUA) level and related gene polymorphisms in the healthy population. METHODS A total of 346 healthy individuals screened from different areas in Shenyang City and 195 patients with high SUA levels were included. RESULTS The levels of TC (total cholesterol), HDL-C (high-density lipoprotein cholesterol), LDL-C (low-density lipoprotein cholesterol), TG (triglycerides), GLU (blood glucose) ALT (alanine aminotransferase), TBA (total bile acid), TBIL (total bilirubin), CR (creatinine) and CYSC (Cystatin C) were statistically different between the healthy and hyperuricemia population (P<0.05). However, there was no statistical difference in the UA level between the two groups (P>0.05). After adjusting for UA, TC, HDL-C, LDL-C, GLU, TBIL and CYSC, the additive and recessive models of rs2231142 were statistically significant in females (P<0.05). For males, haplotypes of A-C-A-A-G-G, A-C-G-C-G-G and A-T-G-A-A-G had significant difference between the healthy and hyperuricemia population (P<0.05). For females, the haplotypes of A-C-G-C-G-G and A-T-A-C-A-T had significant differences (P<0.05). CONCLUSION The distributions of SLC2A9 (solute carrier family 2 and facilitated glucose transporter member 9), ABCG2 (ATP-binding cassette G2), GCKR (glucokinase regulatory protein), KCNQ1, IGFIR (Insulin-like growth factor-I receptor) and VEGFR (Vascular Endothelial Growth Factor Receptor) were balanced in the population in Shenyang City. The haplotypes of A-C-A-A-G-G, A-C-G-C-G-G and A-T-G-A-A-G were the influencing factors of high SUA in the population in Shenyang City.
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Affiliation(s)
- L. Wang
- The First Affiliated Hospital of China Medical University, Dept. of General Practice, Shenyang, Liaoning, China
| | - X. Chen
- The First Affiliated Hospital of China Medical University, Dept. of General Practice, Shenyang, Liaoning, China
| | - L. Han
- Shengjing Hospital of China Medical University, Shenyang, Liaoning, Shenyang, Liaoning, China
| | - B. Jin
- Dalian Medical University, Dalian, Liaoning, Dept. of Gerontology and Geriatrics, Shenyang, Liaoning, China
| | - W. Han
- Shengjing Hospital of China Medical University, Shenyang, Liaoning, Shenyang, Liaoning, China
| | - J. Jia
- Jixian Community Health Service Centre, Heping District, Dept. of General Practice, Shenyang, Liaoning, China
| | - X. Bai
- Shengjing Hospital of China Medical University, Shenyang, Liaoning, Shenyang, Liaoning, China
| | - Z. Teng
- The First Hospital of China Medical University, Dept. of Medical Oncology, Shenyang, Liaoning, China
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Dagar S, Teng Z, Gottmann K. Transsynaptic N-Cadherin Adhesion Complexes Control Presynaptic Vesicle and Bulk Endocytosis at Physiological Temperature. Front Cell Neurosci 2021; 15:713693. [PMID: 34759800 PMCID: PMC8573734 DOI: 10.3389/fncel.2021.713693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Accepted: 09/13/2021] [Indexed: 11/30/2022] Open
Abstract
At mammalian glutamatergic synapses, most basic elements of synaptic transmission have been shown to be modulated by specific transsynaptic adhesion complexes. However, although crucial for synapse homeostasis, a physiological regulation of synaptic vesicle endocytosis by adhesion molecules has not been firmly established. The homophilic adhesion protein N-cadherin is localized at the peri-active zone, where the highly temperature-dependent endocytosis of vesicles occurs. Here, we demonstrate an important modulatory role of N-cadherin in endocytosis at near physiological temperature by synaptophysin-pHluorin imaging. Different modes of endocytosis including bulk endocytosis were dependent on N-cadherin expression and function. N-cadherin modulation might be mediated by actin filaments because actin polymerization ameliorated the knockout-induced endocytosis defect. Using super-resolution imaging, we found strong recruitment of N-cadherin to glutamatergic synapses upon massive vesicle release, which might in turn enhance vesicle endocytosis. This provides a novel, adhesion protein-mediated mechanism for efficient coupling of exo- and endocytosis.
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Affiliation(s)
- Sushma Dagar
- Institute of Neuro- and Sensory Physiology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Zenghui Teng
- Institute of Neuro- and Sensory Physiology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Kurt Gottmann
- Institute of Neuro- and Sensory Physiology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
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Teng Z, Zhu Y, Teng Y, Long Q, Hao Q, Yu X, Yang L, Lv Y, Liu J, Zeng Y, Lu S. The analysis of osteosarcopenia as a risk factor for fractures, mortality, and falls. Osteoporos Int 2021; 32:2173-2183. [PMID: 33877382 DOI: 10.1007/s00198-021-05963-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 04/14/2021] [Indexed: 12/14/2022]
Abstract
UNLABELLED Osteosarcopenia is defined as the concomitant occurrence of sarcopenia and osteoporosis/osteopenia. This study aimed to clarify whether osteosarcopenia implies a greater risk of fractures, mortality, and falls and to draw attention to osteosarcopenia. INTRODUCTION Osteosarcopenia, which is characterized by the co-existence of osteoporosis/osteopenia and sarcopenia, is one of the most challenging geriatric syndromes. However, the association between osteosarcopenia and the risk of falls, fractures, disability, and mortality is controversial. METHODS We searched PubMed, Embase, and the Cochrane Central Register of Controlled Trials, from their inception to March 18, 2021, for cohort studies on the relationship between osteosarcopenia and fractures, falls, and mortality. Two reviewers independently extracted data and assessed study quality. A pooled analysis was performed to calculate odds ratios (ORs) and 95% confidence intervals (CIs) using fixed or random-effects models. RESULTS Eight cohort studies including 19,836 participants showed that osteosarcopenia significantly increased the risk of fracture (OR 2.46, 95% CI 1.83-3.30, Pheterogeneity = 0.006, I2 = 63.0%), three cohort studies involving 2601 participants indicated that osteosarcopenia significantly increased the risk of mortality (OR 1.66, 95% CI 1.23-2.26, Pheterogeneity = 0.214, I2 = 35.2%), and three cohort studies involving 3144 participants indicated that osteosarcopenia significantly increased the risk of falls (OR 1.62, 95% CI 1.28-2.04, Pheterogeneity = 0.219, I2 = 34.1%). No publication bias existed among the studies regarding the association between osteosarcopenia and fractures. The findings were robust according to the subgroup and sensitivity analyses. CONCLUSIONS This pooled analysis demonstrated that osteosarcopenia significantly increased the risk of fractures, falls, and mortality, thus highlighting its relevance in daily life. Therefore, we suggest that elderly persons should be aware of the risks associated with osteosarcopenia.
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Affiliation(s)
- Z Teng
- The Sixth Affiliated Hospital of Kunming Medical University, Kunming, Yuxi, China
- Yunnan Key Laboratory of Digital Orthopedics, The First People's Hospital of Yunnan Province, Kunming, China
- Graduate School of Kunming Medical University, Kunming, China
| | - Y Zhu
- The Sixth Affiliated Hospital of Kunming Medical University, Kunming, Yuxi, China
| | - Y Teng
- The Sixth Affiliated Hospital of Kunming Medical University, Kunming, Yuxi, China
| | - Q Long
- The Sixth Affiliated Hospital of Kunming Medical University, Kunming, Yuxi, China
| | - Q Hao
- The Sixth Affiliated Hospital of Kunming Medical University, Kunming, Yuxi, China
| | - X Yu
- Graduate School of Kunming Medical University, Kunming, China
| | - L Yang
- Graduate School of Kunming Medical University, Kunming, China
| | - Y Lv
- The Sixth Affiliated Hospital of Kunming Medical University, Kunming, Yuxi, China
| | - J Liu
- Graduate School of Kunming Medical University, Kunming, China
| | - Y Zeng
- The Sixth Affiliated Hospital of Kunming Medical University, Kunming, Yuxi, China.
| | - S Lu
- Yunnan Key Laboratory of Digital Orthopedics, The First People's Hospital of Yunnan Province, Kunming, China.
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Qu X, Liu Y, Teng Z, Zhang Y, Zheng D, Man L, Wang Z, Wang Y, Zhang J, Zhang H, Liu J, Chen H, Xiao W, Jiang Y, Zhang J, Liu S, Wang C. 422P The efficacy and safety of irinotecan plus raltitrexed as second-line treatment in advanced colorectal cancer (ACC) patients: A summary analysis of a multicenter, phase II trial. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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14
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Taieb J, Hammel P, Reni M, Palmer D, Bridgewater J, Cubillo A, Prager G, Bayle S, Hédouin-Biville F, Teng Z, Seufferlein T, Macarulla T. SO-3 Treatment sequences and prognostic factors in metastatic pancreatic ductal adenocarcinoma: Univariate and multivariate analyses of a real-world study in Europe. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.05.027] [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: 11/26/2022] Open
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15
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Wei MY, Lv RR, Teng Z. Circular RNA circHIPK3 as a novel circRNA regulator of autophagy and endothelial cell dysfunction in atherosclerosis. Eur Rev Med Pharmacol Sci 2021; 24:12849-12858. [PMID: 33378035 DOI: 10.26355/eurrev_202012_24187] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE The aim of the study was to explore the role and mechanism of circHIPK3 in atherosclerosis. MATERIALS AND METHODS AS model was constructed in vivo and in vitro for high fat-fed and ox-LDL treatment. RT-PCR was used to assess the level of circHIPK3. The autophagy level of HUVECs was detected by Western blot, transmission electron microscopy, and LC3II fluorescence intensity. HUVECs lipid accumulation was assessed by oil red staining. Luciferase assay was performed to verify the relationship of circRNA and miRNA, miRNA, and target gene. RESULTS The expression of circHIPK3 was downregulated in HFD mice, and ox-LDL treated HUVECs. The level of autophagy was decreased in AS, which was reversed by overexpression of circHIPK3. Meanwhile, forced expression of circHIPK3 would reduce the accumulation of lipid in HUVECs. CONCLUSIONS CircHIPK3 could inhibit lipid content in ox-LD-treated HUVECs via activating autophagy. This progression mechanism may target the miR-190b/ATG7 signal pathway, which indicates a suitable role in the pathogenesis of atherosclerosis.
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Affiliation(s)
- M-Y Wei
- Cardiovascular Department, Cangzhou Central Hospital, Cangzhou, Hebei Province, China.
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Jia FY, Guo W, Sun L, Zhang T, Xu B, Teng Z, Lou YJ, Tao D, Zhou H, Zhang D, Gao Y. Effects of Dietary Fiber on Growth Performance, Fat Deposition, Fat Metabolism, and Expression of Lipoprotein Lipase Mrna in Two Breeds of Geese. Braz J Poult Sci 2021. [DOI: 10.1590/1806-9061-2020-1287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- FY Jia
- The Ministry of Education, China; Jilin Agricultural University, China
| | - W Guo
- Jilin Agricultural University, China
| | - L Sun
- The Ministry of Education, China; Jilin Agricultural University, China
| | - T Zhang
- Jilin Province Science and Technology Innovation Platform Management Center, China
| | - B Xu
- The Ministry of Education, China; Jilin Agricultural University, China
| | - Z Teng
- Jilin Agricultural University, China
| | - YJ Lou
- The Ministry of Education, China
| | - D Tao
- Jilin Agricultural University, China
| | - H Zhou
- The Ministry of Education, China; Jilin Agricultural University, China
| | - D Zhang
- The Ministry of Education, China; Jilin Agricultural University, China
| | - Y Gao
- The Ministry of Education, China
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Kuang XZ, Xiao WJ, Teng Z, Pan H, Yuan ZA, Wu F, Zhang X. [Pathogenic characteristics of viral gastroenteritis among pediatric inpatients under five years old during 2014-2017]. Zhonghua Liu Xing Bing Xue Za Zhi 2019; 40:895-899. [PMID: 31484250 DOI: 10.3760/cma.j.issn.0254-6450.2019.08.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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 conduct a viral pathogen surveillance program on pediatric inpatients less than five years old with acute gastroenteritis in Shanghai and to better understand the pathogenic spectrum and molecular features in the target population, for setting up programs on control, prevention, medication and vaccine applications of the diseases. Methods: Fecal samples were collected from inpatients less than 5 years old who were admitted to a pediatric hospital for having acute gastroenteritis. Information related to demographic, clinical and epidemiological features of the patients was also collected. Laboratory assays including ELISA, real-time PCR and nested PCR, were performed to detect the presence of pathogens as rotavirus, calicivirus, astrovirus and adenovirus. Results: A total of 1 018 samples were collected (male 671 and 347 female), with the positive detection rate as 40.57% which peaked from autumn till winter, annually. Calicivirus and rotavirus A presented with the highest detection rates (24.75% and 13.95% respectively). The lowest detection rate was found in the 0-6 month-olds (32.20%). 65% of the patients with positive virus had received antibiotic treatment prior to the hospitalization. However, no statistically significant difference was seen, regarding the rates of antibiotic medication in the virus positive or negative populations (P>0.05). Data from the Rotavirus genotype analysis revealed that G9P[8] genotype was the predominant strain, and causing majority of rotavirus infections in all the age groups. Conclusions: Among the inpatients under 5 years of age in Shanghai, the positive detection rate for Calicivirus was higher than that for rotavirus group A, suggesting the necessity to carefully monitor the changes regarding the pathogenic spectrum and subtypes of the virus. Antibiotics should also be attentively administered, together with the development of suitable vaccine.
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Affiliation(s)
- X Z Kuang
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - W J Xiao
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - Z Teng
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - H Pan
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - Z A Yuan
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - F Wu
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China; Shanghai Institutes of Preventive Medicine, Shanghai 200336, China
| | - X Zhang
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
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18
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Zheng YX, Chen J, Kong DC, Pan H, Zhou YQ, Chen ML, Teng Z, Wu HY, Yuan ZA. [Pathogenic characteristics of hospitalized severe acute respiratory infections in Shanghai, China, 2015-2017]. Zhonghua Liu Xing Bing Xue Za Zhi 2019; 40:911-916. [PMID: 31484253 DOI: 10.3760/cma.j.issn.0254-6450.2019.08.008] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To understand the epidemiological and pathogenic characteristics of hospitalized severe acute respiratory infections (SARI) in Shanghai, China. Methods: From 2015 to 2017, one Tertiary hospital and one Secondary hospital were chosen as the surveillance sites. Two respiratory tract specimens per case were collected from SARI cases aged 15 years and older. One specimen was tested for 22 respiratory pathogens by RT-PCR, and the other specimen was cultured for 6 respiratory bacteria. Results: A total of 287 SARI cases were enrolled for sampling and lab testing. 70.73% of the cases were aged 60 years and older, with 41.46% (119/287) were positive for at least one pathogen. Influenza virus was the predominant pathogen, accounting for 17.77% (51/287) of all SARI cases. Human rhinovirus/Enterovirus and Coronavirus were both accounting for 7.32% (21/287), followed by Mycoplasma pneumoniae (5.57%, 16/287). The positive rates of parainfluenza virus, bocavirus, adenovirus, respiratory syncytial virus and human metapneumo virus were all less than 5%. Bacterial strains were identified in seven SARI cases, including Klebsiella pneumoniae (3 strains), Staphylococcus aureus (2 strains), Streptococcus pneumoniae (1 strain) and Pseudomonas aeruginosa (1 strain). Two or Three pathogens were co-detected from 40 cases, accounting for 33.61% of 119 positive cases. The most common co-detected pathogens were influenza virus and Mycoplasma pneumoniae (10 cases). Influenza cases peaked in winter-spring and summer. Mycoplasma pneumoniae peaked in winter-spring season and overlapped with influenza. The positive rates of pathogens were not significantly different between different age groups. Conclusions: Various respiratory pathogens can be detected from SARI cases aged 15 years and older. Influenza virus was the predominant pathogen and the co-detection of influenza virus with Mycoplasma pneumoniae the most common one.
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Affiliation(s)
- Y X Zheng
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China; Fudan University, Shanghai 200032, China
| | - J Chen
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - D C Kong
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - H Pan
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - Y Q Zhou
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - M L Chen
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - Z Teng
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - H Y Wu
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - Z A Yuan
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
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Lin S, Pan H, Xiao WJ, Gong XH, Kuang XZ, Teng Z, Zhang X, Wu HY. [Epidemiologic characteristics of Norovirus among adult patients with infectious diarrhea, in Shanghai, 2013-2018]. Zhonghua Liu Xing Bing Xue Za Zhi 2019; 40:883-888. [PMID: 31484248 DOI: 10.3760/cma.j.issn.0254-6450.2019.08.003] [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: 06/10/2023]
Abstract
Objective: To investigate the epidemiologic characteristics of Norovirus among adult patients suffering from infectious diarrhea in Shanghai, so as to provide evidence for developing related strategies on prevention and control of the disease. Methods: Diarrheal outpatients were monitored at the 'Intestinal clinic' from 22 hospitals involved in the sentinel surveillance program in Shanghai. Information on demographic and epidemiologic features of the patients was collected while data and clinical, fecal specimens were collected and sent to the district CDC for Norovirus detection. Positive rates of Norovirus were also compared in various populations and seasons during 2013-2018. Multivariate logistic regression model was adopted to fit into the comparisons between non-Norovirus and Norovirus groups. Results: 19.28% of the 12 083 diarrheal cases were found to have carried the Norovirus, with GⅡgroup the most commonly identified genotype. Rates of detection was seen higher in males (20.78%) than in females (17.73%). 30-44 year-old were found having the highest positive rate (21.51%). The positive rates were found the highest (23.60%) in the year of 2015. All the above shown differences were statistically significant (P<0.05). Diarrheal patients affected with Norovirus would present watery stool (75.94%) and vomiting (35.84%). Data from the multivariate logistic analysis showed that factors as: being males, 30-44 years old, officials/clerks, in winter season and with histories of travelling etc., were related to higher risks on Norovirus infection. Conclusions: Infectious diarrhea caused by Norovirus occurred all year round, with seasonal peaks seen in winter and spring, in Shanghai. Specific prevention and control measures should be taken on Norovirus- caused infectious diarrhea, according to the difference on age, gender and season.
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Affiliation(s)
- S Lin
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
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20
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Zhu C, Tian X, Degnan AJ, Shi Z, Zhang X, Chen L, Teng Z, Saloner D, Lu J, Liu Q. Clinical Significance of Intraplaque Hemorrhage in Low- and High-Grade Basilar Artery Stenosis on High-Resolution MRI. AJNR Am J Neuroradiol 2018; 39:1286-1292. [PMID: 29794236 DOI: 10.3174/ajnr.a5676] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Accepted: 03/29/2018] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Intraplaque hemorrhage within intracranial atherosclerotic plaques identified by high-resolution MR imaging has been studied as a potential marker of stroke risk. However, previous studies only examined intracranial arteries with high-grade stenosis (degree of stenosis, >50%). This study aimed to ascertain the clinical relevance of intraplaque hemorrhage in patients with low- and high-grade stenotic basilar artery plaques. MATERIALS AND METHODS Patients with basilar artery stenosis (n = 126; mean age, 62 ± 10 years; 66 symptomatic and 60 asymptomatic) underwent high-resolution MR imaging. The relationship between imaging findings (intraplaque hemorrhage, contrast enhancement, degree of stenosis, minimal lumen area, and plaque burden) and symptoms was analyzed. RESULTS Intraplaque hemorrhage was identified in 22 patients (17.5%), including 21 (31.8%) symptomatic patients and 1 (1.7%) asymptomatic patient. Multivariate analysis showed that intraplaque hemorrhage was the strongest independent marker of symptomatic status (odds ratio, 27.5; 95% CI, 3.4-221.5; P = .002). Contrast enhancement was also independently associated with symptomatic status (odds ratio, 9.9; 95% CI, 1.5-23.6; P = .016). Stenosis, minimal lumen area, and plaque burden were not correlated with symptoms (P > .05). Intraplaque hemorrhage was present in both low- and high-grade stenotic basilar arteries (11.3% versus 16.3%, P = .63). Diagnostic performance values of intraplaque hemorrhage for patients with acute/subacute symptomatic stroke were the following: specificity, 98.3%; sensitivity, 31.8%; positive predictive value, 95.5%; and negative predictive value, 56.7%. CONCLUSIONS Intraplaque hemorrhage is present in both low- and high-grade stenotic basilar artery plaques and is independently associated with symptomatic stroke status. Intraplaque hemorrhage may identify high-risk plaque and provide new insight into the management of patient with stroke without significant stenosis.
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Affiliation(s)
- C Zhu
- From the Department of Radiology and Biomedical Imaging (C.Z., D.S.), University of California, San Francisco, San Francisco, California
| | - X Tian
- Department of Radiology (X.T., Z.S., X.Z., L.C., J.L., Q.L.), Changhai Hospital, Shanghai, China
| | - A J Degnan
- Department of Radiology (A.J.D.), Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Z Shi
- Department of Radiology (X.T., Z.S., X.Z., L.C., J.L., Q.L.), Changhai Hospital, Shanghai, China
| | - X Zhang
- Department of Radiology (X.T., Z.S., X.Z., L.C., J.L., Q.L.), Changhai Hospital, Shanghai, China
| | - L Chen
- Department of Radiology (X.T., Z.S., X.Z., L.C., J.L., Q.L.), Changhai Hospital, Shanghai, China
| | - Z Teng
- Department of Radiology (Z.T.), University of Cambridge, Cambridge, UK
| | - D Saloner
- From the Department of Radiology and Biomedical Imaging (C.Z., D.S.), University of California, San Francisco, San Francisco, California
| | - J Lu
- Department of Radiology (X.T., Z.S., X.Z., L.C., J.L., Q.L.), Changhai Hospital, Shanghai, China
| | - Q Liu
- Department of Radiology (X.T., Z.S., X.Z., L.C., J.L., Q.L.), Changhai Hospital, Shanghai, China
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Liu E, Zhang YX, Sun LL, Teng Z, Wang AB, Han HB, Yan JH. [Role of aquaporin-4 in the change of interstitial fluid drainage in Alzheimer's disease]. Beijing Da Xue Xue Bao Yi Xue Ban 2018; 50:203-206. [PMID: 29643515] [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: 06/08/2023]
Abstract
OBJECTIVE To observe the characteristics of the interstitial fluid (ISF) drainage in the Alzheimer's disease (AD) rats through magnetic resonance imaging (MRI) tracer gadolinium-diethylene triamine pentacetic acid (Gd-DTPA)spread in the brain extracellular space (ECS) and to discuss the role of aquaporin-4 (Aqp4) in the AD. METHODS Wild type SD rats (300-350 g) and Aqp4 gene knock out (Aqp4-/-) SD rats (300-350g) were divided into Sham group, AD group, Aqp4-/--Sham group and Aqp4-/--AD group. Sham group and Aqp4-/--Sham group were injected with saline by intraperitoneal each day for 6 weeks, and the AD group and Aqp4-/--AD group were injected with D-galactose by intraperitoneal each day for 6 weeks. MRI tracer Gd-DTPA (10 mmol/L, 2 μL) was injected into the hippocampus of the rats. MRI scan was performed at the end of 0.5 h, 1.5 h, 1 h, 2 h, and 3 h to observe the dynamic distribution of the Gd-DTPA in the hippocampus and the diffusion rate D*, clearance rate k' and half-life t1/2 measured. RESULTS The diffusion rate D* in Sham group was (2.66±0.36)×10-6 mm2/s, the diffusion rate D* in AD group was (2.72±0.62)×10-6 mm2/s, the diffusion rate D* in Aqp4-/--Sham group was (2.75±0.47)×10-6 mm2/s, the diffusion rate D* in Aqp4-/--AD group was (2.802±0.55)×10-6 mm2/s, and there was no statistically significant difference in the four groups (One-Way ANOVA, P>0.05).The clearance rate k' in Sham group was (4.57±0.14)×10-4/s, the clearance rate k' in AD group was (3.68±0.22)×10-4/s, the clearance rate k' in Aqp4-/--Sham group was (3.17±0.16)×10-4/s, the clearance rate k' in Aqp4-/--AD group was (2.59±0.19)×10-4/s, and there was significant difference in the four groups (One-Way ANOVA, P<0.05). The half-life t1/2 in Sham group was (0.67±0.12) h, the half-life t1/2 in AD group was (0.88±0.08) h, the half-life t1/2 in Aqp4-/--Sham group was (1.12±0.15) h, the half-life t1/2 in Aqp4-/--AD group was (1.58±0.11) h, and there was significance difference in the four groups(one-way ANOVA,P<0.05). CONCLUSION The ISF drainage is slow after AD and the loss of Aqp4 in the AD makes the ISF drainage obviously slow down, Aqp4 plays an important role in AD to remove the metabolism of waste out of the brain.
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Affiliation(s)
- E Liu
- Department of Anatomy and Embryology, School of Basic Medical Sciences, Peking University, Beijing 100191, China
| | - Y X Zhang
- Department of Anatomy and Embryology, School of Basic Medical Sciences, Peking University, Beijing 100191, China
| | - L L Sun
- Department of Anatomy and Embryology, School of Basic Medical Sciences, Peking University, Beijing 100191, China
| | - Z Teng
- Beijing Key Lab of Magnetic Resonance Imaging Device and Technique, Beijing 100191, China
| | - A B Wang
- Beijing Key Lab of Magnetic Resonance Imaging Device and Technique, Beijing 100191, China
| | - H B Han
- Beijing Key Lab of Magnetic Resonance Imaging Device and Technique, Beijing 100191, China
| | - J H Yan
- Department of Anatomy and Embryology, School of Basic Medical Sciences, Peking University, Beijing 100191, China
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Jiang Y, Peng W, Tian B, Zhu C, Chen L, Wang X, Liu Q, Wang Y, Xiang Z, Degnan AJ, Teng Z, Saloner D, Lu J. Identification and Quantitative Assessment of Different Components of Intracranial Atherosclerotic Plaque by Ex Vivo 3T High-Resolution Multicontrast MRI. AJNR Am J Neuroradiol 2017; 38:1716-1722. [PMID: 28684455 DOI: 10.3174/ajnr.a5266] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Accepted: 04/23/2017] [Indexed: 01/30/2023]
Abstract
BACKGROUND AND PURPOSE High-resolution 3T MR imaging can visualize intracranial atherosclerotic plaque. However, histologic validation is still lacking. This study aimed to evaluate the ability of 3T MR imaging to identify and quantitatively assess intracranial atherosclerotic plaque components ex vivo with histologic validation. MATERIALS AND METHODS Fifty-three intracranial arterial specimens with atherosclerotic plaques from 20 cadavers were imaged by 3T MR imaging with T1, T2, and proton-density-weighted FSE and STIR sequences. The signal characteristics and areas of fibrous cap, lipid core, calcification, fibrous tissue, and healthy vessel wall were recorded on MR images and compared with histology. Fibrous cap thickness and maximum wall thickness were also quantified. The percentage of areas of the main plaque components, the ratio of fibrous cap thickness to maximum wall thickness, and plaque burden were calculated and compared. RESULTS The signal intensity of the lipid core was significantly lower than that of the fibrous cap on T2-weighted, proton-density, and STIR sequences (P < .01) and was comparable on T1-weighted sequences (P = 1.00). Optimal contrast between the lipid core and fibrous cap was found on T2-weighted images. Plaque component mean percentages were comparable between MR imaging and histology: fibrous component (81.86% ± 10.59% versus 81.87% ± 11.59%, P = .999), lipid core (19.51% ± 10.76% versus 19.86% ± 11.56%, P = .863), and fibrous cap (31.10% ± 11.28% versus 30.83% ± 8.51%, P = .463). However, MR imaging overestimated mean calcification (9.68% ± 5.21% versus 8.83% ± 5.67%, P = .030) and plaque burden (65.18% ± 9.01% versus 52.71% ± 14.58%, P < .001). CONCLUSIONS Ex vivo 3T MR imaging can accurately identify and quantitatively assess intracranial atherosclerotic plaque components, providing a direct reference for in vivo intracranial plaque imaging.
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Affiliation(s)
- Y Jiang
- From the Department of Radiology (Y.J.), Wuhan General Hospital of the People's Liberation Army, Wuhan, China.,Departments of Radiology (Y.J., W.P., B.T., L.C., X.W., Q.L., J.L.)
| | - W Peng
- Departments of Radiology (Y.J., W.P., B.T., L.C., X.W., Q.L., J.L.)
| | - B Tian
- Departments of Radiology (Y.J., W.P., B.T., L.C., X.W., Q.L., J.L.)
| | - C Zhu
- Department of Radiology and Biomedical Imaging (C.Z., D.S.), University of California, San Francisco, San Francisco, California
| | - L Chen
- Departments of Radiology (Y.J., W.P., B.T., L.C., X.W., Q.L., J.L.)
| | - X Wang
- Departments of Radiology (Y.J., W.P., B.T., L.C., X.W., Q.L., J.L.)
| | - Q Liu
- Departments of Radiology (Y.J., W.P., B.T., L.C., X.W., Q.L., J.L.)
| | - Y Wang
- Pathology (Y.W., Z.X.), Changhai Hospital, Shanghai, China
| | - Z Xiang
- Pathology (Y.W., Z.X.), Changhai Hospital, Shanghai, China
| | - A J Degnan
- Department of Radiology (A.J.D.), University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
| | - Z Teng
- Department of Radiology (Z.T.), University of Cambridge, Cambridge, UK
| | - D Saloner
- Department of Radiology and Biomedical Imaging (C.Z., D.S.), University of California, San Francisco, San Francisco, California
| | - J Lu
- Departments of Radiology (Y.J., W.P., B.T., L.C., X.W., Q.L., J.L.)
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Teng Z, Douglas G, Brown A, Sutcliffe M, Gillard J. Impact of fibre orientation in fibrous cap on the mechanical loading in human coronary atherosclerotic plaques. Atherosclerosis 2016. [DOI: 10.1016/j.atherosclerosis.2016.07.118] [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: 11/30/2022]
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24
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Liu Y, Wang Y, Teng Z, Chen J, Li Y, Chen Z, Li Z, Zhang Z. Matrix metalloproteinase 9 expression and survival of patients with osteosarcoma: a meta-analysis. Eur J Cancer Care (Engl) 2015; 26. [PMID: 26239566 DOI: 10.1111/ecc.12364] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/29/2015] [Indexed: 11/28/2022]
Abstract
Several studies have evaluated the effect of matrix metalloproteinase-9 (MMP-9) expression on the overall survival of patients with osteosarcoma, but the results remain conflicting. To examine the prognostic significance of MMP-9 expression in osteosarcoma risk, we conducted this meta-analysis to systematically review the published studies. We searched the commonly used electronic databases updated to September 2013 for relevant studies which evaluated the correction between MMP-9 expression and survival of patients with osteosarcoma. Overall, a total of eight studies including 437 cases were screened out. No significant heterogeneity was observed between studies. The MMP-9 was expressed in 73.9% (323/437) of cases, and the results showed that MMP-9 expression was associated with increased mortality rate of osteosarcoma during the follow-up (risk ratio = 2.79, 95% confidence interval, CI = 1.96-3.97, P < 0.00001). By ethnicity analysis, a significant correction was also found between MMP-9 expression and osteosarcoma risk among Asian and non-Asian population (P < 0.001), indicating that MMP-9 was an indicator of prognosis of osteosarcoma. In conclusion, this meta-analysis indicated that MMP-9 expression might be a biomarker of poor prognosis for patients with osteosarcoma. However, the prognostic value of MMP-9 on survival of osteosarcoma patients still needs further large-scale trials to be clarified.
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Affiliation(s)
- Y Liu
- Department of Orthopedic Surgery, Affiliated Hospital of Hebei University of Engineering, Handan, Hebei
| | - Y Wang
- Department of Pharmacology, Medical College of Hebei University of Engineering, Handan, Hebei
| | - Z Teng
- Department of Orthopedic Surgery, People's Hospital of Yuxi City, Yuxi, Yunnan
| | - J Chen
- Department of Orthopedic Surgery, Affiliated Hospital of Hebei University of Engineering, Handan, Hebei
| | - Y Li
- Department of Orthopedic Surgery, Affiliated Hospital of Hebei University of Engineering, Handan, Hebei
| | - Z Chen
- Department of Orthopedic Surgery, Affiliated Hospital of Hebei University of Engineering, Handan, Hebei
| | - Z Li
- Department of Orthopedic Surgery, Affiliated Hospital of Hebei University of Engineering, Handan, Hebei
| | - Z Zhang
- Department of Orthopedic Surgery, General Hospital of Jizhong Energy Fengfeng Group, Handan, Hebei, China
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25
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Teng Z, Sutcliffe M, Lu Q, Gillard J. The extensibility and ultimate material strength of atherosclerotic component in human carotid plaques. Atherosclerosis 2015. [DOI: 10.1016/j.atherosclerosis.2015.04.129] [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: 11/16/2022]
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26
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Zhao B, Qin S, Teng Z, Chen J, Yu X, Gao Y, Shen J, Cui X, Zeng M, Zhang X. Epidemiological study of influenza B in Shanghai during the 2009-2014 seasons: implications for influenza vaccination strategy. Clin Microbiol Infect 2015; 21:694-700. [PMID: 25882368 DOI: 10.1016/j.cmi.2015.03.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2014] [Revised: 02/13/2015] [Accepted: 03/21/2015] [Indexed: 11/29/2022]
Abstract
A new quadrivalent influenza vaccine has been available for influenza B, which can pose a significant global health burden. Shanghai has the highest GDP and largest metropolitan population in China. To understand the impact of influenza B in Shanghai in terms of age-related incidence and relative prevalence compared with other subtypes, we conducted this retrospective epidemiological study of influenza B in the 2009-2014 seasons. A total of 71 354 outpatients with influenza-like illness were included, and both lineages of influenza B and subtypes of influenza A were identified using real-time RT-PCR. The antigenic characteristics of influenza B isolates were analysed by sequencing and reciprocal haemagglutinin inhibition assay. On average, 33.45% of influenza strains were influenza B, and 40.20% of strains isolated from children were influenza B. The incidence of influenza B was highest (12.52 per 100 people with influenza-like illness) in children ages 6-17 years and usually peaked in this age group at the early stage of an influenza B epidemic. Overall, both matched and mismatched influenza B strains co-circulated in Shanghai annually, and 44.57% of the circulating influenza B belonged to the opposite lineage of the vaccine strains. We concluded that influenza B has caused a substantial impact in Shanghai and that school-aged children play a key role in the transmission of influenza B. Hence, it may be beneficial to prioritize influenza vaccination for school-aged children to mitigate the outbreaks of influenza B.
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Affiliation(s)
- B Zhao
- Bio-X Institutes, Shanghai Jiao Tong University, Shanghai, China; Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
| | - S Qin
- Bio-X Institutes, Shanghai Jiao Tong University, Shanghai, China
| | - Z Teng
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
| | - J Chen
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
| | - X Yu
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
| | - Y Gao
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
| | - J Shen
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
| | - X Cui
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
| | - M Zeng
- Department of Infectious Diseases, Children's Hospital of Fudan University, Shanghai, China.
| | - X Zhang
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China.
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Makris GC, Teng Z, Patterson AJ, Lin JM, Young V, Graves MJ, Gillard JH. Advances in MRI for the evaluation of carotid atherosclerosis. Br J Radiol 2015; 88:20140282. [PMID: 25826233 DOI: 10.1259/bjr.20140282] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Carotid artery atherosclerosis is an important source of mortality and morbidity in the Western world with significant socioeconomic implications. The quest for the early identification of the vulnerable carotid plaque is already in its third decade and traditional measures, such as the sonographic degree of stenosis, are not selective enough to distinguish those who would really benefit from a carotid endarterectomy. MRI of the carotid plaque enables the visualization of plaque composition and specific plaque components that have been linked to a higher risk of subsequent embolic events. Blood suppressed T1 and T2 weighted and proton density-weighted fast spin echo, gradient echo and time-of-flight sequences are typically used to quantify plaque components such as lipid-rich necrotic core, intraplaque haemorrhage, calcification and surface defects including erosion, disruption and ulceration. The purpose of this article is to review the most important recent advances in MRI technology to enable better diagnostic carotid imaging.
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Affiliation(s)
- G C Makris
- Department of Radiology, University of Cambridge, Cambridge, UK
| | - Z Teng
- Department of Radiology, University of Cambridge, Cambridge, UK
| | - A J Patterson
- Department of Radiology, University of Cambridge, Cambridge, UK
| | - J-M Lin
- Department of Radiology, University of Cambridge, Cambridge, UK
| | - V Young
- Department of Radiology, University of Cambridge, Cambridge, UK
| | - M J Graves
- Department of Radiology, University of Cambridge, Cambridge, UK
| | - J H Gillard
- Department of Radiology, University of Cambridge, Cambridge, UK
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28
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Agarwal A, Zhang M, Trembak-Duff I, Unterbarnscheidt T, Radyushkin K, Dibaj P, Martins de Souza D, Boretius S, Brzózka MM, Steffens H, Berning S, Teng Z, Gummert MN, Tantra M, Guest PC, Willig KI, Frahm J, Hell SW, Bahn S, Rossner MJ, Nave KA, Ehrenreich H, Zhang W, Schwab MH. Dysregulated expression of neuregulin-1 by cortical pyramidal neurons disrupts synaptic plasticity. Cell Rep 2014; 8:1130-45. [PMID: 25131210 DOI: 10.1016/j.celrep.2014.07.026] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Revised: 04/04/2014] [Accepted: 07/16/2014] [Indexed: 12/17/2022] Open
Abstract
Neuregulin-1 (NRG1) gene variants are associated with increased genetic risk for schizophrenia. It is unclear whether risk haplotypes cause elevated or decreased expression of NRG1 in the brains of schizophrenia patients, given that both findings have been reported from autopsy studies. To study NRG1 functions in vivo, we generated mouse mutants with reduced and elevated NRG1 levels and analyzed the impact on cortical functions. Loss of NRG1 from cortical projection neurons resulted in increased inhibitory neurotransmission, reduced synaptic plasticity, and hypoactivity. Neuronal overexpression of cysteine-rich domain (CRD)-NRG1, the major brain isoform, caused unbalanced excitatory-inhibitory neurotransmission, reduced synaptic plasticity, abnormal spine growth, altered steady-state levels of synaptic plasticity-related proteins, and impaired sensorimotor gating. We conclude that an "optimal" level of NRG1 signaling balances excitatory and inhibitory neurotransmission in the cortex. Our data provide a potential pathomechanism for impaired synaptic plasticity and suggest that human NRG1 risk haplotypes exert a gain-of-function effect.
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Affiliation(s)
- Amit Agarwal
- Department of Neurogenetics, Max Planck Institute of Experimental Medicine, 37075 Göttingen, Germany; Solomon H. Snyder Department of Neuroscience, Johns Hopkins University, Baltimore, MD 21025, USA
| | - Mingyue Zhang
- Laboratory of Molecular Psychiatry, Department of Psychiatry, University of Münster, 48149 Muenster Germany
| | - Irina Trembak-Duff
- Laboratory of Molecular Psychiatry, Department of Psychiatry, University of Münster, 48149 Muenster Germany
| | - Tilmann Unterbarnscheidt
- Department of Neurogenetics, Max Planck Institute of Experimental Medicine, 37075 Göttingen, Germany
| | - Konstantin Radyushkin
- Clinical Neuroscience, Max Planck Institute of Experimental Medicine, 37075 Göttingen, Germany
| | - Payam Dibaj
- Department of Neurogenetics, Max Planck Institute of Experimental Medicine, 37075 Göttingen, Germany
| | | | - Susann Boretius
- Biomedizinische NMR Forschungs GmbH, Max Planck Institute of Biophysical Chemistry, 37077 Göttingen, Germany
| | - Magdalena M Brzózka
- Department of Neurogenetics, Max Planck Institute of Experimental Medicine, 37075 Göttingen, Germany
| | - Heinz Steffens
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, 37077 Göttingen, Germany
| | - Sebastian Berning
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, 37077 Göttingen, Germany
| | - Zenghui Teng
- Laboratory of Molecular Psychiatry, Department of Psychiatry, University of Münster, 48149 Muenster Germany
| | - Maike N Gummert
- Department of Neurogenetics, Max Planck Institute of Experimental Medicine, 37075 Göttingen, Germany
| | - Martesa Tantra
- Clinical Neuroscience, Max Planck Institute of Experimental Medicine, 37075 Göttingen, Germany
| | - Peter C Guest
- Institute of Biotechnology, University of Cambridge, Cambridge CB2 1QT, UK
| | - Katrin I Willig
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, 37077 Göttingen, Germany
| | - Jens Frahm
- Biomedizinische NMR Forschungs GmbH, Max Planck Institute of Biophysical Chemistry, 37077 Göttingen, Germany
| | - Stefan W Hell
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, 37077 Göttingen, Germany
| | - Sabine Bahn
- Institute of Biotechnology, University of Cambridge, Cambridge CB2 1QT, UK
| | - Moritz J Rossner
- Department of Neurogenetics, Max Planck Institute of Experimental Medicine, 37075 Göttingen, Germany
| | - Klaus-Armin Nave
- Department of Neurogenetics, Max Planck Institute of Experimental Medicine, 37075 Göttingen, Germany
| | - Hannelore Ehrenreich
- Clinical Neuroscience, Max Planck Institute of Experimental Medicine, 37075 Göttingen, Germany
| | - Weiqi Zhang
- Laboratory of Molecular Psychiatry, Department of Psychiatry, University of Münster, 48149 Muenster Germany.
| | - Markus H Schwab
- Department of Neurogenetics, Max Planck Institute of Experimental Medicine, 37075 Göttingen, Germany.
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29
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Hu J, Zhu Y, Zhao B, Li J, Liu L, Gu K, Zhang W, Su H, Teng Z, Tang S, Yuan Z, Feng Z, Wu F. Limited human-to-human transmission of avian influenza A(H7N9) virus, Shanghai, China, March to April 2013. Euro Surveill 2014; 19. [DOI: 10.2807/1560-7917.es2014.19.25.20838] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In April 2013, two members of one family were successively confirmed as cases of avian influenza A(H7N9) virus infection in Shanghai, China. Respiratory specimens from the two cases and their close contacts were tested using real-time reverse-transcription (RT)-PCR. Paired serum specimens from contacts were tested by haemagglutination inhibition assay and microneutralisation test. The index patient developed severe pneumonia. Her husband presented with pneumonia shortly thereafter. Both cases had highly similar clinical features and infection with A(H7N9) virus was confirmed in both cases by genetic analysis. Phylogenetic analysis revealed a high level of similarity between the sequences from the two patients and environmental samples collected from wet markets in Minhang and Changning districts. Six samples from the Changning wet market were confirmed as A(H7N9) positive. Of 27 close contacts, one developed mild respiratory symptoms and another tested positive for A(H7N9) antibodies, but both were negative by real-time RT-PCR. The other 25 close contacts of both cases were A(H7N9) negative. Limited human-to-human transmission of the virus most likely occurred in the family cluster. However, other close contacts did not test positive for the virus, suggesting limited potential for extensive human-to-human transmission of the virus.
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Affiliation(s)
- J Hu
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
- These authors contributed equally to this article
| | - Y Zhu
- These authors contributed equally to this article
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
| | - B Zhao
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
- These authors contributed equally to this article
| | - J Li
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
| | - L Liu
- Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - K Gu
- Jin-an District Center for Disease Control and Prevention, Shanghai, China
| | - W Zhang
- Huashan Hospital, Fudan University, Shanghai, China
| | - H Su
- Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Z Teng
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
| | - S Tang
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
| | - Z Yuan
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
| | - Z Feng
- Public Health Emergency Center, Chinese Center for Disease Control and Prevention (China CDC), Beijing, China
| | - F Wu
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
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30
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Teng Z, Zhang M, Zhao M, Zhang W. Glucocorticoid exerts its non-genomic effect on IPSC by activation of a phospholipase C-dependent pathway in prefrontal cortex of rats. J Physiol 2013; 591:3341-53. [PMID: 23652592 DOI: 10.1113/jphysiol.2013.254961] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
In response to stressor, the brain activates a comprehensive stress system. Among others, this stress system causes release of glucocorticoids that also feed back to the brain. Glucocorticoids affect brain function by activation of both delayed, genomic and rapid, non-genomic mechanisms in rodents. Here we report that application of the potent glucocorticoid receptor agonist dexamethasone (DEX) caused a rapid increase of spontaneous and miniature inhibitory postsynaptic currents (IPSCs) and elicited intermittent burst activities through a non-genomic pathway, involving membrane-located receptors. The onset of the rapid effect in prefrontal cortex (PFC, <15 min) was much slower than in hippocampus (<5 min). The intermittent burst activities were abolished in the presence of TTX. Furthermore, the nitric oxide (NO) pathway was present and endogenously activated in PFC. Part of the rapid DEX effect in PFC remained after blocking NO-sensitive guanylyl cyclase that was due to activation of a phospholipase C-diacylglycerol-dependent signalling pathway. Thus, our data demonstrated that glucocorticoids could rapidly enhance IPSCs and evoke burst activities by activation of at least two different signalling pathways in hippocampus and PFC of rats.
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Affiliation(s)
- Zenghui Teng
- Laboratory of Molecular Psychiatry, Department of Psychiatry, Westfälische Wilhelms-University of Münster, Albert-Schweitzer-Campus 1, Gebäude 9a, 48149 Münster, Germany
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31
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Teng Z, Guo M, Liu X, Dai Q, Wang C, Xuan P. Measuring gene functional similarity based on group-wise comparison of GO terms. Bioinformatics 2013; 29:1424-32. [PMID: 23572412 DOI: 10.1093/bioinformatics/btt160] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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32
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Huan M, Zhang B, Teng Z, Cui H, Wang J, Liu X, Xia H, Zhou S, Mei Q. In vitro and in vivo antitumor activity of a novel pH-activated polymeric drug delivery system for doxorubicin. PLoS One 2012; 7:e44116. [PMID: 23028490 PMCID: PMC3454402 DOI: 10.1371/journal.pone.0044116] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [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: 12/08/2011] [Accepted: 08/01/2012] [Indexed: 01/01/2023] Open
Abstract
Background Conventional chemotherapy agent such as doxorubicin (DOX) is of limited clinical use because of its inherently low selectivity, which can lead to systemic toxicity in normal healthy tissue. Methods A pH stimuli-sensitive conjugate based on polyethylene glycol (PEG) with covalently attachment doxorubicin via hydrazone bond (PEG-hyd-DOX) was prepared for tumor targeting delivery system. While PEG-DOX conjugates via amid bond (PEG-ami-DOX) was synthesized as control. Results The synthetic conjugates were confirmed by proton nuclear magnetic resonance (NMR) spectroscopy, the release profile of DOX from PEG-hyd-DOX was acid-liable for the hydrazone linkage between DOX and PEG, led to different intracellular uptake route; intracellular accumulation of PEG-hyd-DOX was higher than PEG-ami-DOX due to its pH-triggered profile, and thereby more cytotoxicity against MCF-7, MDA-MB-231 (breast cancer models) and HepG2 (hepatocellular carcinoma model) cell lines. Following the in vitro results, we xenografted MDA-MB-231 cell onto SCID mice, PEG-hyd-DOX showed stronger antitumor efficacy than free DOX and was tumor-targeting. Conclusions Results from these in vivo experiments were consistent with our in vitro results; suggested this pH-triggered PEG-hyd-DOX conjugate could target DOX to tumor tissues and release free drugs by acidic tumor environment, which would be potent in antitumor drug delivery.
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Affiliation(s)
- Menglei Huan
- Department of Pharmaceutics, School of Pharmacy, Fourth Military Medical University, Xi'an, People's Republic of China
| | - Bangle Zhang
- Department of Pharmaceutics, School of Pharmacy, Fourth Military Medical University, Xi'an, People's Republic of China
| | - Zenghui Teng
- Department of Pharmaceutics, School of Pharmacy, Fourth Military Medical University, Xi'an, People's Republic of China
| | - Han Cui
- Department of Pharmaceutics, School of Pharmacy, Fourth Military Medical University, Xi'an, People's Republic of China
| | - Jieping Wang
- Department of Pharmacy, Tangdu Hospital, Fourth Military Medical University, Xi'an, People's Republic of China
| | - Xinyou Liu
- Department of Pharmacy, Tangdu Hospital, Fourth Military Medical University, Xi'an, People's Republic of China
| | - Hui Xia
- Department of Thoracic-Cardio Surgery, First Affiliated Hospital of PLA General Hospital, Beijing, People's Republic of China
| | - Siyuan Zhou
- Department of Pharmaceutics, School of Pharmacy, Fourth Military Medical University, Xi'an, People's Republic of China
| | - Qibing Mei
- Key Laboratory of Gastrointestinal Pharmacology of Chinese Materia Medica of the State Administration of Traditional Chinese Medicine, School of Pharmacy, Fourth Military Medical University, Xi'an, People's Republic of China
- * E-mail:
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Teng Z, Yuan C, Zhang F, Huan M, Cao W, Li K, Yang J, Cao D, Zhou S, Mei Q. Intestinal absorption and first-pass metabolism of polyphenol compounds in rat and their transport dynamics in Caco-2 cells. PLoS One 2012; 7:e29647. [PMID: 22253753 PMCID: PMC3258254 DOI: 10.1371/journal.pone.0029647] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.9] [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: 10/16/2011] [Accepted: 12/02/2011] [Indexed: 11/19/2022] Open
Abstract
Background Polyphenols, a group of complex naturally occurring compounds, are widely distributed throughout the plant kingdom and are therefore readily consumed by humans. The relationship between their chemical structure and intestinal absorption, transport, and first-pass metabolism remains unresolved, however. Methods Here, we investigated the intestinal absorption and first-pass metabolism of four polyphenol compounds, apigenin, resveratrol, emodin and chrysophanol, using the in vitro Caco-2 cell monolayer model system and in situ intestinal perfusion and in vivo pharmacokinetic studies in rats, so as to better understand the relationship between the chemical structure and biological fate of the dietary polyphenols. Conclusion After oral administration, emodin and chrysophanol exhibited different absorptive and metabolic behaviours compared to apigenin and resveratrol. The differences in their chemical structures presumably resulted in differing affinities for drug-metabolizing enzymes, such as glucuronidase and sulphatase, and transporters, such as MRP2, SGLT1, and P-glycoprotein, which are found in intestinal epithelial cells.
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Affiliation(s)
- Zenghui Teng
- Department of Pharmaceutics, School of Pharmacy, Fourth Military Medical University, Xi'an, People's Republic of China
| | - Chengjun Yuan
- Cardiovascular Department, First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, People's Republic of China
| | - Feng Zhang
- Key Laboratory of Gastrointestinal Pharmacology of Chinese Materia Medica of the State Administration of Traditional Chinese Medicine, School of Pharmacy, Fourth Military Medical University, Xi'an, People's Republic of China
| | - Menglei Huan
- Department of Pharmaceutics, School of Pharmacy, Fourth Military Medical University, Xi'an, People's Republic of China
| | - Weidong Cao
- Xijing Hospital, Fourth Military Medical University, Xi'an, People's Republic of China
| | - Kangchu Li
- Department of Radiation Medicine, Fourth Military Medical University, Xi'an, People's Republic of China
| | - Jingyue Yang
- Xijing Hospital, Fourth Military Medical University, Xi'an, People's Republic of China
| | - Dayong Cao
- Xijing Hospital, Fourth Military Medical University, Xi'an, People's Republic of China
| | - Siyuan Zhou
- Department of Pharmaceutics, School of Pharmacy, Fourth Military Medical University, Xi'an, People's Republic of China
- * E-mail: (SZ); (QM)
| | - Qibing Mei
- Key Laboratory of Gastrointestinal Pharmacology of Chinese Materia Medica of the State Administration of Traditional Chinese Medicine, School of Pharmacy, Fourth Military Medical University, Xi'an, People's Republic of China
- * E-mail: (SZ); (QM)
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Liu R, Teng Z, Yuan C, Huan M, Liu X, Zhou S. LIQUID CHROMATOGRAPHY/POSITIVE-ION ELECTROSPRAY TANDEM MASS SPECTROMETRY ASSAY FOR NISOLDIPINE IN HUMAN PLASMA AND ITS APPLICATION TO A PHARMACOKINETIC STUDY. J LIQ CHROMATOGR R T 2011. [DOI: 10.1080/10826076.2011.579675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Renwang Liu
- a Department of Pharmaceutics , School of Pharmacy, Fourth Military Medical University , Shaan'xi, China
| | - Zenghui Teng
- a Department of Pharmaceutics , School of Pharmacy, Fourth Military Medical University , Shaan'xi, China
| | - Chengjun Yuan
- b Department of Cardiovascular , First Affiliated Hospital, Xi'an Jiaotong University , Shaan'xi, China
| | - Menglei Huan
- a Department of Pharmaceutics , School of Pharmacy, Fourth Military Medical University , Shaan'xi, China
| | - Xinyou Liu
- c Department of Pharmacy , Tangdu Hospital, Fourth Military Medical University , Shaan'xi, China
| | - Siyuan Zhou
- a Department of Pharmaceutics , School of Pharmacy, Fourth Military Medical University , Shaan'xi, China
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Teng Z, Sadat U, Huang Y, Young V, Graves M, Lu J, Gillard J. In vivo MRI-based 3D Mechanical Stress–Strain Profiles of Carotid Plaques with Juxtaluminal Plaque Haemorrhage: An Exploratory Study for the Mechanism of Subsequent Cerebrovascular Events. Eur J Vasc Endovasc Surg 2011; 42:427-33. [DOI: 10.1016/j.ejvs.2011.05.009] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2011] [Accepted: 05/09/2011] [Indexed: 11/30/2022]
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Degnan AJ, Gallagher G, Teng Z, Lu J, Liu Q, Gillard JH. MR angiography and imaging for the evaluation of middle cerebral artery atherosclerotic disease. AJNR Am J Neuroradiol 2011; 33:1427-35. [PMID: 21940802 DOI: 10.3174/ajnr.a2697] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Intracranial atherosclerotic disease may constitute the most common cause of ischemic stroke worldwide; yet, in the developed world, imaging research has largely focused on extracranial atherosclerosis. Many studies in populations of Asian, African, and Hispanic descent demonstrate the preponderance of intracranial stenosis compared with carotid stenosis. This review examines the clinical presentations of MCA atherosclerosis and stenosis and the use of noninvasive MR imaging in the assessment of intracranial vasculature. MRA is a well-validated technique that offers great advantage over traditional angiography. Advances in high-resolution MR imaging of MCA stenosis have the potential to yield excellent visualization of plaque. Future developments in high-resolution MR imaging to depict intracranial atherosclerosis are explored in this review; these advances will guide endovascular therapy and the comparison of novel interventions.
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Affiliation(s)
- A J Degnan
- University Department of Radiology, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
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Sadat U, Teng Z, Young VE, Walsh SR, Li ZY, Graves MJ, Varty K, Gillard JH. Association between biomechanical structural stresses of atherosclerotic carotid plaques and subsequent ischaemic cerebrovascular events--a longitudinal in vivo magnetic resonance imaging-based finite element study. Eur J Vasc Endovasc Surg 2010; 40:485-91. [PMID: 20724181 DOI: 10.1016/j.ejvs.2010.07.015] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2010] [Accepted: 07/19/2010] [Indexed: 11/16/2022]
Abstract
BACKGROUND High-resolution magnetic resonance (MR) imaging has been used for MR imaging-based structural stress analysis of atherosclerotic plaques. The biomechanical stress profile of stable plaques has been observed to differ from that of unstable plaques; however, the role that structural stresses play in determining plaque vulnerability remains speculative. METHODS A total of 61 patients with previous history of symptomatic carotid artery disease underwent carotid plaque MR imaging. Plaque components of the index artery such as fibrous tissue, lipid content and plaque haemorrhage (PH) were delineated and used for finite element analysis-based maximum structural stress (M-C Stress) quantification. These patients were followed up for 2 years. The clinical end point was occurrence of an ischaemic cerebrovascular event. The association of the time to the clinical end point with plaque morphology and M-C Stress was analysed. RESULTS During a median follow-up duration of 514 days, 20% of patients (n = 12) experienced an ischaemic event in the territory of the index carotid artery. Cox regression analysis indicated that M-C Stress (hazard ratio (HR): 12.98 (95% confidence interval (CI): 1.32-26.67, p = 0.02), fibrous cap (FC) disruption (HR: 7.39 (95% CI: 1.61-33.82), p = 0.009) and PH (HR: 5.85 (95% CI: 1.27-26.77), p = 0.02) are associated with the development of subsequent cerebrovascular events. Plaques associated with future events had higher M-C Stress than those which had remained asymptomatic (median (interquartile range, IQR): 330 kPa (229-494) vs. 254 kPa (166-290), p = 0.04). CONCLUSIONS High biomechanical structural stresses, in addition to FC rupture and PH, are associated with subsequent cerebrovascular events.
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Affiliation(s)
- U Sadat
- University Department of Radiology, University of Cambridge, Cambridge, UK.
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Sadat U, Mohsen L, Young V, Teng Z, Gillard J. MS556 HIGH RESOLUTION MRI-BASED BIOMECHANICAL STRESS ANALYSIS OF CAROTID PLAQUES CAN PREDICT SEVERITY OF WHITE MATTER LESIONS. ATHEROSCLEROSIS SUPP 2010. [DOI: 10.1016/s1567-5688(10)71056-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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39
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Sadat U, Teng Z, Young V, Gillard J. MS558 HIGH RESOLUTION MRI-BASED BIOMECHANICAL STRESS ANALYSIS OF CAROTID ATHEROMA: A COMPARISON OF TRANSIENT ISCHEMIC ATTACK AND STROKE PATIENT GROUPS. ATHEROSCLEROSIS SUPP 2010. [DOI: 10.1016/s1567-5688(10)71058-8] [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: 11/30/2022]
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40
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Cao W, Yang X, Zhou J, Teng Z, Cao L, Zhang X, Fei Z. Targeting 14-3-3 protein, difopein induces apoptosis of human glioma cells and suppresses tumor growth in mice. Apoptosis 2010; 15:230-41. [PMID: 20033782 DOI: 10.1007/s10495-009-0437-4] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [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: 11/27/2022]
Abstract
14-3-3 protein has emerged as critical regulators of diverse cellular responses. Previous studies found that strong 14-3-3 protein expression was observed and associated with tumor genesis and progression in glioma. Here, we further elucidated the role of 14-3-3 protein in apoptosis of human glioma U251 and U87 cells by global inhibition of 14-3-3 functions with a general 14-3-3 antagonist, difopein. In vitro, morphological observation and DNA laddering assay showed that difopein-treated glioma cells displayed outstanding apoptosis characteristics, such as nuclear fragmentation, appearance of membrane-enclosed apoptotic bodies and DNA laddering fragment. Moreover, flow cytometric detection of phosphatidylserine externalization indicated that difopein-induced apoptosis occurred in a time-dependent manner. Interestingly, inhibiting 14-3-3 with small interfere RNA also induce apoptosis of human glioma U251 cells. Furthermore, RT-PCR and western blot assay further substantiated that difopein had strong effects to induce glioma cell apoptosis through down-regulating Bcl-2, up-regulating Bax and activating caspase-9 and caspase-3. In vivo, retroviral vector was constructed and retroviral-mediated transfer of difopein to glioma was implanted in nude mice. Difopein effectively hindered proliferation and triggered apoptosis of tumor cells implanted into nude mice. This work not only reveals a critical role of 14-3-3 in apoptosis suppression in glioma cells, but also identifies and validates 14-3-3 as a potential molecular target for anticancer therapeutic development.
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Affiliation(s)
- Weidong Cao
- Institute of Neurosurgery, Xijing Hospital, Fourth Military Medical University, Changle Western Road 17#, 710032 Xi'an, Shaanxi Province, People's Republic of China
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Liu X, Teng Z, Zhang Y, Huan M, Zhou S. High Performance Liquid Chromatography—Tandem Mass Spectrometric Determination of Resveratrol and Its Metabolites in Rat Tissues. ANAL LETT 2010. [DOI: 10.1080/00032710903406938] [Citation(s) in RCA: 6] [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: 10/19/2022]
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42
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Zhou S, Zhang B, Liu X, Teng Z, Huan M, Yang T, Yang Z, Jia M, Mei Q. A new natural angelica polysaccharide based colon-specific drug delivery system. J Pharm Sci 2009; 98:4756-68. [DOI: 10.1002/jps.21790] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Yuan P, Huang Y, Wu H, Teng Z, Zhang J, Xin X. Induction of a local pseudo-pregnancy via levonorgestrel-loaded microspheres for the treatment of endometriosis in a rabbit model. Hum Reprod 2009; 25:462-9. [PMID: 19897855 DOI: 10.1093/humrep/dep386] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Endometriosis is a chronic disease that responds to systemic pseudo-pregnancy therapy. However, side effects limit their long-term use, and recurrence often occurs after cessation of medication. Reducing side effects whereas improving therapeutic efficacy of pseudo-pregnancy therapy seems contradictory, but appealing. In order to address this dilemma, the efficacy and side effects of local pseudo-pregnancy therapy were investigated for the first time in an endometriosis animal model. METHODS AND RESULTS Levonorgestrel-loaded polylactic acid microspheres (LNG-microspheres) were prepared by using an oil-in-water emulsification-solvent evaporation method. Rabbits with experimental endometriosis were randomized to treatment with local pseudo-pregnancy therapy, local blank microspheres, systemic pseudo-pregnancy therapy, ovariectomy or the control. Local pseudo-pregnancy was induced by injection of LNG-microspheres directly into endometrial cysts. Compared with the systemic pseudo-pregnancy group, significantly higher intra-cystic drug levels were maintained for at least 6 months with much lower serum levels in the local pseudo-pregnancy group (P < 0.01). The high intra-cystic levonorgestrel simulated a state of potent pregnancy, which induced size reductions and endometrial atrophy comparable to those of ovariectomy. Moreover, major metabolic parameters and ovarian function were not disturbed by local pseudo-pregnancy therapy. CONCLUSIONS Induction of a local pseudo-pregnancy could achieve therapeutic efficacy comparable to that of ovariectomy without provoking any marked side effects in a rabbit endometriosis model. Thus it may be a preferable option for patients with endometriosis.
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Affiliation(s)
- Peng Yuan
- Department of Obstetrics and Gynecology, Xijing Hospital, Fourth Military Medical University, No. 17 Changle West Road, Xi'an, Shaan'xi 710032, China.
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Zhou S, Yang R, Teng Z, Zhang B, Hu Y, Yang Z, Huan M, Zhang X, Mei Q. Dose-dependent absorption and metabolism of trans-polydatin in rats. J Agric Food Chem 2009; 57:4572-4579. [PMID: 19397265 DOI: 10.1021/jf803948g] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
There is considerable evidence that stilbenes provide health benefits. trans-Polydatin is one of the major stilbenoid compounds in red wine. The purpose of this study is to investigate the dose-dependent absorption and metabolism of trans-polydatin in rats. trans-Polydatin was administered to rats by gavage at three different doses (50, 100, and 300 mg x kg(-1)). Blood samples were then collected at different time points. In situ perfusion of rat small intestine and liver was used to investigate the first-pass metabolism of trans-polydatin. trans-Polydatin and its metabolites were detected by LC-MS/MS. trans-Polydatin and its metabolites resveratrol, glucuronidated resveratrol, and glucuronidated trans-polydatin were detected in plasma within 10 min following oral administration of trans-polydatin; in situ perfusion of the rat small intestine and liver with trans-polydatin yielded the same result. The AUC(0-infinity) of trans-polydatin and its metabolites increased in a dose dependent manner following oral administration of trans-polydatin. This indicates that in the rats, trans-polydatin is absorbed in a dose-dependent manner and undergoes extensive first-pass deglycosylation and glucuronidation. Orally administered trans-polydatin, therefore, is metabolized primarily to resveratrol in the small intestine and liver, where it is further metabolized to the glucuronidated resveratrol.
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Affiliation(s)
- Siyuan Zhou
- Department of Pharmaceutics, Xijing Hospital, Fourth Military Medical University, Xi'an, China
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Zhou S, Hu Y, Zhang B, Teng Z, Gan H, Yang Z, Wang Q, Huan M, Mei Q. Dose-dependent absorption, metabolism, and excretion of genistein in rats. J Agric Food Chem 2008; 56:8354-8359. [PMID: 18710250 DOI: 10.1021/jf801051d] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Genistein (4',5,7-trihydroxyisoflavone), a naturally occurring phenolic compound, possesses well-known preventive activity in breast and prostate cancer, cardiovascular diseases, and postmenopausal problems. The aim of this study is to investigate the distribution and dose-dependent absorption, metabolism, and excretion of genistein in rats. Genistein was orally administered to rats at different doses. At various time intervals, blood, bile, and urine samples were collected and incubated with glucuronidase to hydrolyze the glucuronidated genistein. Genistein was detected by HPLC. High levels of glucuronidated genistein were detected in the plasma, bile, and urine after genistein administration. When genistein was administered to rats at 6.25, 12.5, and 50 mg x kg (-1) doses, the AUC (0- t) values for genistein were 23.5, 80.9, and 177.9 mg x min x L (-1); the oral absolute bioavailabilities were 21.9, 33.5, and 19.0%; the AUC (0- t) values of glucuronidated genistein were 173.8, 470.7, and 1721.2 mg x min x L (-1), respectively. The cumulative biliary excretion of genistein respective to each dose was 42.6 +/- 6.5, 75.2 +/- 18.9, and 126.6 +/- 34.8 microg; the cumulative biliary excretion of glucuronidated genistein was 108.5 +/- 35.2, 423.5 +/- 158.3, and 853.7 +/- 320.8 microg for each dose, respectively. The cumulative urinary excretion of genistein was 34.8 +/- 10.8, 187.3 +/- 67.0 and 213.6 +/- 30.6 microg for each dose, respectively; the cumulative levels of glucuronidated genistein excreted in the urine were 217.8 +/- 52.1, 583.1 +/- 106.9, and 1108.4 +/- 88.1 microg, respectively. These results indicated that at high doses absorption, biotransformation, and excretion of genistein occurred in a nonlinear dose-dependent manner. Therefore, the results of these pharmacokinetic studies raise important questions about the therapeutic significance of consuming large quantities of genistein, genistein analogues, or soy-based neutraceuticals.
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Affiliation(s)
- Siyuan Zhou
- Department of Pharmacology, School of Pharmacy, Fourth Military Medical University, Xi'an 710032, China
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Xu Y, Liu R, Zhang Z, Hao Q, Qi S, Li J, Teng Z. Variables which might predict the response to salvage radiotherapy in chinese patients with biochemical failure after radical prostatectomy. Urol Int 2006; 77:205-10. [PMID: 17033206 DOI: 10.1159/000094810] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2005] [Accepted: 03/15/2006] [Indexed: 11/19/2022]
Abstract
BACKGROUND/AIMS To evaluate the relationship between the variables and the outcomes of salvage radiotherapy (sRT) to find some predictors of sRT. METHODS The medical records of 56 patients receiving sRT for biochemical failure after radical prostatectomy (RP) were available for retrospective review. sRT was defined as external beam radiotherapy for patients with a continuous increase in the prostate-specific antigen (PSA) level of >or=0.2 ng/ml after RP. Response was defined as achievement of a PSA nadir of <or=0.1 ng/ml. RESULTS The mean follow-up period after sRT was 31.6 months. The predictors of response to sRT were PSA doubling time (PSADT) and seminal vesicle invasion. The median PSADT in responders was 6.5 months versus 4.0 months in non-responders (OR=1.66, p=0.006). The patients with a PSADT of >6 months were all responders. The response rate in patients with seminal vesicle invasion was 42.9% (6/14) versus 76.2% (32/42) in patients without seminal vesicle invasion (OR=0.119, p=0.015). CONCLUSION PSADT and the state of seminal vesicle invasion were good predictors of response to sRT. sRT was especially effective when the PSADT was >6 months and in patients without seminal vesicle invasion.
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Affiliation(s)
- Y Xu
- Department of Urology, Second Hospital of Tianjin Medical University, Tianjin Institute of Urology, Tianjin, China
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Jiang Z, Li H, Liu B, Teng Z, Qing K. [Biomechanical properties of arteries in experimental hypotensive rats]. Sheng Wu Yi Xue Gong Cheng Xue Za Zhi 2001; 18:381-4. [PMID: 11605494] [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: 02/21/2023]
Abstract
To study the changes of biomechanical properties after arterial remodeling in hypotension, a model of hypotension was established in rats by constricting the abdominal aorta below the orifice of the left renal artery. The change of opening angles of the abdominal aorta, femoral artery and anterior tibial artery, and the compliance of the abdominal aorta were studied. The relationship between the pressure and volume of the abdominal aorta were also observed in vivo. The results show that non-uniformal remodeling of the hypotensive artery induces the reduction of opening angles in the zero-stress state, the C/E rate of the abdominal artery decreases while the compliance increases.
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Affiliation(s)
- Z Jiang
- Institute of Biomedical Engineering, Second Military Medical University, Shanghai 200433
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Ruan Y, Liu W, Xu X, Weng SQ, Shao SK, Zhou WQ, Teng Z, Gu HX, Zhu ZY, Xu ZY. [Comparative study on antibody levels of vaccination group and control group after 4 years of immunized with type B inactivated vaccine against hemorrhagic fever with renal syndrome]. Zhonghua Shi Yan He Lin Chuang Bing Du Xue Za Zhi 2001; 15:274-6. [PMID: 11986705] [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: 02/24/2023]
Abstract
OBJECTIVE To compare the antibody level of vaccine group and control group in a randomized, controlled trial of type B inactivated vaccine against hemorrhagic fever with renal syndrome(HFRS) in Jiande County of Zhejiang Province and to find out if there is enhancement of subclinical infection about type B inactivated vaccine against HFRS. METHODS The number of sera collected (July 1994-July 1998) in vaccine group immunized type B inactivated vaccine against HFRS and control group were 305 and 283 persons in Jiande County respectively, and indirect immunofluorescent antibody method(IFAT) was used for testing the titer of HFRS IgG in sera. The cut-off values were determined on IFA titer of the second sera in control group with positive and negative IFA before vaccine was given respectively, and the subclinical infection of positive and negative IFA of the first sera in vaccine group was evaluated. RESULTS When taking different cut-off values of subclinical infection, there were no statistical differences in HFRS IFA positive rates between vaccine group and control group of positive IFA in the first sera. In vaccine group and control group of negative IFA before vaccine given, also the IFA positive rates were not statistically different in these groups. There were no statistical differences of IFA GMT and IFA sero-negative rate between vaccine group and control group. CONCLUSIONS The investigation showed there was no statistical difference in antibody level between vaccine group and control group, so there could not be enhancement of subclinical infection of vaccine group receiving type B inactivated vaccine against HFRS.
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Affiliation(s)
- Y Ruan
- Center of EPI, Chinese Academy of Preventive Medicine, Beijing 100050, China
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Abstract
In this paper, single-species nonautonomous dispersal models with delays are considered. An interesting result on the effect of dispersal for persistence and extinction is obtained. That is, if the species is persistent in a patch then it is also persistent in all other patches; if the species is permanent in a patch then it is also permanent in all other patches; if the species is extinct in a patch then it is also extinct in all other patches. Furthermore, some new sufficient conditions for the permanence and extinction of the species in a patch are established. The existence of positive periodic solutions is obtained in the periodic case by employing Teng and Chen's results on the existence of positive periodic solutions for functional differential equations.
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Affiliation(s)
- Z Teng
- Department of Mathematics, Xinjiang University, Urumqi, PR China.
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