1
|
Zheleznova AO, Sun J, Zhu SD, Kuzmenkova NV, Rozhkova AK, Petrov VG, Xing S, Shi K, Hou X, Kalmykov SN. Sorption behaviour of neptunium in marine and fresh water bottom sediments in Far East area of Russia (Lake Khanka and Amur Bay). J Environ Radioact 2024; 272:107334. [PMID: 38008046 DOI: 10.1016/j.jenvrad.2023.107334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Revised: 11/12/2023] [Accepted: 11/14/2023] [Indexed: 11/28/2023]
Abstract
The concentration and sorption behavior of 237Np on the bottom sediments of water bodies in the Far East region of Russia (Lake Khanka and Peter the Great Bay) were studied for the first time. The 237Np concentrations vary from 1.06 × 10-6 to 4.43 × 10-5 mBq g-1 in the bottom sediments of Lake Khanka and from 1.05 × 10-4 to 2.52 × 10-3 mBq g-1 for Amur Bay. The experiment on the adsorption of Np on marine and lake sediment showed that it is sorbed through complexation with silicates (albite, leucite). The Np sorption isotherm on marine sediments is described by the Langmuir equation; the distribution coefficients (Kd) of Np vary from 57 to 588 mL g-1. For lake sediments, the isotherm is described by the Henry equation; the Kd value reaches 935 mL g-1.
Collapse
Affiliation(s)
- A O Zheleznova
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1 Bld.3, Moscow, Russia, 119991.
| | - J Sun
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, China
| | - S D Zhu
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, China
| | - N V Kuzmenkova
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1 Bld.3, Moscow, Russia, 119991; Institute of Geography, RAS, Staromonetny Per. 29, Bld. 4, Moscow, Russia
| | - A K Rozhkova
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1 Bld.3, Moscow, Russia, 119991; Vernadsky Institute of Geochemistry and Analytical Chemistry, RAS, St. Kosygin 19, Moscow, Russia, 119991
| | - V G Petrov
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1 Bld.3, Moscow, Russia, 119991
| | - S Xing
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, China
| | - K Shi
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, China
| | - X Hou
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, China
| | - S N Kalmykov
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1 Bld.3, Moscow, Russia, 119991
| |
Collapse
|
2
|
Jin Y, He Y, Liu B, Zhang X, Song C, Wu Y, Hu W, Yan Y, Chen N, Ding Y, Ou Y, Wu Y, Zhang M, Xing S. Single-cell RNA sequencing reveals the dynamics and heterogeneity of lymph node immune cells during acute and chronic viral infections. Front Immunol 2024; 15:1341985. [PMID: 38352870 PMCID: PMC10863051 DOI: 10.3389/fimmu.2024.1341985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Accepted: 01/12/2024] [Indexed: 02/16/2024] Open
Abstract
Introduction The host immune response determines the differential outcome of acute or chronic viral infections. The comprehensive comparison of lymphoid tissue immune cells at the single-cell level between acute and chronic viral infections is largely insufficient. Methods To explore the landscape of immune responses to acute and chronic viral infections, single-cell RNA sequencing(scRNA-seq), scTCR-seq and scBCR-seq were utilized to evaluate the longitudinal dynamics and heterogeneity of lymph node CD45+ immune cells in mouse models of acute (LCMV Armstrong) and chronic (LCMV clone 13) viral infections. Results In contrast with acute viral infection, chronic viral infection distinctly induced more robust NK cells and plasma cells at the early stage (Day 4 post-infection) and acute stage (Day 8 post-infection), respectively. Moreover, chronic viral infection exerted decreased but aberrantly activated plasmacytoid dendritic cells (pDCs) at the acute phase. Simultaneously, there were significantly increased IgA+ plasma cells (MALT B cells) but differential usage of B-cell receptors in chronic infection. In terms of T-cell responses, Gzma-high effector-like CD8+ T cells were significantly induced at the early stage in chronic infection, which showed temporally reversed gene expression throughout viral infection and the differential usage of the most dominant TCR clonotype. Chronic infection also induced more robust CD4+ T cell responses, including follicular helper T cells (Tfh) and regulatory T cells (Treg). In addition, chronic infection compromised the TCR diversity in both CD8+ and CD4+ T cells. Discussion In conclusion, gene expression and TCR/BCR immune repertoire profiling at the single-cell level in this study provide new insights into the dynamic and differential immune responses to acute and chronic viral infections.
Collapse
Affiliation(s)
- Yubei Jin
- Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Department of Pathogen Biology, School of Basic Medical Sciences, Shenzhen University Medical School, Shenzhen University, Shenzhen, China
| | - Yudan He
- School of Pharmacy, Shenzhen University Medical School, Shenzhen University, Shenzhen, Guangdong, China
| | - Bing Liu
- Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Department of Pathogen Biology, School of Basic Medical Sciences, Shenzhen University Medical School, Shenzhen University, Shenzhen, China
| | - Xiaohui Zhang
- Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Department of Pathogen Biology, School of Basic Medical Sciences, Shenzhen University Medical School, Shenzhen University, Shenzhen, China
| | - Caimei Song
- Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Department of Pathogen Biology, School of Basic Medical Sciences, Shenzhen University Medical School, Shenzhen University, Shenzhen, China
| | - Yunchen Wu
- Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Department of Pathogen Biology, School of Basic Medical Sciences, Shenzhen University Medical School, Shenzhen University, Shenzhen, China
| | - Wenjing Hu
- Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Department of Pathogen Biology, School of Basic Medical Sciences, Shenzhen University Medical School, Shenzhen University, Shenzhen, China
| | - Yiwen Yan
- Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Department of Pathogen Biology, School of Basic Medical Sciences, Shenzhen University Medical School, Shenzhen University, Shenzhen, China
| | - Nuo Chen
- Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Department of Pathogen Biology, School of Basic Medical Sciences, Shenzhen University Medical School, Shenzhen University, Shenzhen, China
| | - Yingying Ding
- Department of Life Sciences, Bengbu Medical College, Bengbu, Anhui, China
| | - Yuanyuan Ou
- Department of Life Sciences, Bengbu Medical College, Bengbu, Anhui, China
| | - Yixiu Wu
- Department of Life Sciences, Bengbu Medical College, Bengbu, Anhui, China
| | - Mingxia Zhang
- Institute for Hepatology, National Clinical Research Center for Infectious Disease, The Third People’s Hospital of Shenzhen, Shenzhen, Guangdong, China
| | - Shaojun Xing
- Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Department of Pathogen Biology, School of Basic Medical Sciences, Shenzhen University Medical School, Shenzhen University, Shenzhen, China
| |
Collapse
|
3
|
Nan X, Li X, Wu Y, Li H, Wang Q, Xing S, Liang Z. Design, synthesis and biological evaluation of sulfonylamidines as potent c-Met inhibitors by enhancing hydrophobic interaction. Org Biomol Chem 2023; 21:7459-7466. [PMID: 37667983 DOI: 10.1039/d3ob01156a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/06/2023]
Abstract
The dysregulation of c-Met kinase has emerged as a significant contributing factor for the occurrence, progression, poor clinical outcomes and drug resistance of various human cancers. In our ongoing pursuit to identify promising c-Met inhibitors as potential antitumor agents, a docking study of the previously reported c-Met inhibitor 7 revealed a large unoccupied hydrophobic pocket, which could present an opportunity for further exploration of structure-activity relationships to improve the binding affinity with the allosteric hydrophobic back pocket of c-Met. Herein we performed structure-activity relationship and molecular modeling studies based on lead compound 7. The collective endeavors culminated in the discovery of compound 21j with superior efficacy to 7 and positive control foretinib by increasing the hydrophobic interaction with the hydrophobic back pocket of c-Met active site.
Collapse
Affiliation(s)
- Xiang Nan
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, School of Biomedical Engineering, Shenzhen University Medical School, Shenzhen 518060, China
- Department of Stomatology, Shenzhen Second People's Hospital, Shenzhen 518035, China.
| | - Xin Li
- Weihai Marine Organism & Medical Technology Research Institute, Harbin Institute of Technology, Weihai 264209, China.
| | - Yanchao Wu
- Weihai Marine Organism & Medical Technology Research Institute, Harbin Institute of Technology, Weihai 264209, China.
| | - Huijing Li
- Weihai Marine Organism & Medical Technology Research Institute, Harbin Institute of Technology, Weihai 264209, China.
| | - Qiuxu Wang
- Department of Stomatology, Shenzhen Second People's Hospital, Shenzhen 518035, China.
| | - Shaojun Xing
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, School of Biomedical Engineering, Shenzhen University Medical School, Shenzhen 518060, China
| | - Zhigang Liang
- Department of Stomatology, Shenzhen Second People's Hospital, Shenzhen 518035, China.
| |
Collapse
|
4
|
Xing S, Qi XJ, Xia Y, Wu J, Fu WW. [Oligosarcoma: report of a case]. Zhonghua Bing Li Xue Za Zhi 2023; 52:850-852. [PMID: 37527994 DOI: 10.3760/cma.j.cn112151-20230111-00023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 08/03/2023]
Affiliation(s)
- S Xing
- Department of Pathology, the Affiliated Hospital of Qingdao University, Qingdao 266000, China
| | - X J Qi
- Department of Pathology, Linyi People's Hospital, Linyi 276000, China
| | - Y Xia
- Department of Pathology, the Affiliated Hospital of Qingdao University, Qingdao 266000, China
| | - J Wu
- Department of Pathology, the Affiliated Hospital of Qingdao University, Qingdao 266000, China
| | - W W Fu
- Department of Pathology, the Affiliated Hospital of Qingdao University, Qingdao 266000, China
| |
Collapse
|
5
|
Wu Y, He Y, Liu C, Ehle C, Iyer-Bierhoff A, Liu B, Heinzel T, Xing S. Histone Deacetylase Inhibitor (SAHA) Reduces Mortality in an Endotoxemia Mouse Model by Suppressing Glycolysis. Int J Mol Sci 2023; 24:12448. [PMID: 37569823 PMCID: PMC10418975 DOI: 10.3390/ijms241512448] [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: 07/11/2023] [Revised: 07/28/2023] [Accepted: 08/02/2023] [Indexed: 08/13/2023] Open
Abstract
Sepsis is a life-threatening medical emergency triggered by excessive inflammation in response to an infection. High mortality rates and limited therapeutic options pose significant challenges in sepsis treatment. Histone deacetylase inhibitors (HDACi), such as suberoylanilide hydroxamic acid (SAHA), have been proposed as potent anti-inflammatory agents for treating inflammatory diseases. However, the underlying mechanisms of sepsis treatment remain poorly understood. In this study, we investigated the effects of SAHA treatment in the lipopolysaccharide (LPS)-induced endotoxemia mouse model as it closely mimics the early stages of the systemic inflammation of sepsis. Our results demonstrate a reduced inflammatory mediator secretion and improved survival rates in mice. Using quantitative acetylomics, we found that SAHA administration increases the acetylation of lactate dehydrogenase (LDHA), and consequently inhibits LDHA activity. Notably, the reduced enzyme activity of LDHA results in a reduced rate of glycolysis. Furthermore, our experiments with bone marrow-derived macrophages (BMDMs) show that SAHA administration reduced oxidative stress and extracellular ATP concentrations, ultimately blunting inflammasome activation. Overall, our study provides insights into the mechanism underlying SAHA's therapeutic effects in sepsis treatment and highlights LDHA as a potential target for developing novel sepsis treatment.
Collapse
Affiliation(s)
- Yunchen Wu
- School of Basic Medical Sciences, Shenzhen University, Shenzhen 518055, China
- Center for Molecular Biomedicine, Institute of Biochemistry and Biophysics, Friedrich Schiller University Jena, 07745 Jena, Germany
| | - Yudan He
- School of Basic Medical Sciences, Shenzhen University, Shenzhen 518055, China
| | - Chen Liu
- School of Basic Medical Sciences, Shenzhen University, Shenzhen 518055, China
| | - Charlotte Ehle
- Center for Molecular Biomedicine, Institute of Biochemistry and Biophysics, Friedrich Schiller University Jena, 07745 Jena, Germany
| | - Aishwarya Iyer-Bierhoff
- Center for Molecular Biomedicine, Institute of Biochemistry and Biophysics, Friedrich Schiller University Jena, 07745 Jena, Germany
| | - Bing Liu
- School of Basic Medical Sciences, Shenzhen University, Shenzhen 518055, China
| | - Thorsten Heinzel
- Center for Molecular Biomedicine, Institute of Biochemistry and Biophysics, Friedrich Schiller University Jena, 07745 Jena, Germany
| | - Shaojun Xing
- School of Basic Medical Sciences, Shenzhen University, Shenzhen 518055, China
- The First Affiliated Hospital of Shenzhen University, Shenzhen University, Shenzhen 518055, China
| |
Collapse
|
6
|
Ye L, Lü L, Lin X, He K, Yang X, Wan Z, Liu L, Wu H, Xing S, Wu X. Effect of lipid peroxidation on the allergenicity and functional properties of soybean β-conglycinin (7S) and glycinin (11S). Food Science and Human Wellness 2023. [DOI: 10.1016/j.fshw.2022.09.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
7
|
Lee MM, Charalampidis EG, Xing S, Chong C, Kevrekidis PG. Breathers in lattices with alternating strain-hardening and strain-softening interactions. Phys Rev E 2023; 107:054208. [PMID: 37328995 DOI: 10.1103/physreve.107.054208] [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] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Accepted: 03/21/2023] [Indexed: 06/18/2023]
Abstract
This work focuses on the study of time-periodic solutions, including breathers, in a nonlinear lattice consisting of elements whose contacts alternate between strain hardening and strain softening. The existence, stability, and bifurcation structure of such solutions, as well as the system dynamics in the presence of damping and driving, are studied systematically. It is found that the linear resonant peaks in the system bend toward the frequency gap in the presence of nonlinearity. The time-periodic solutions that lie within the frequency gap compare well to Hamiltonian breathers if the damping and driving are small. In the Hamiltonian limit of the problem, we use a multiple scale analysis to derive a nonlinear Schrödinger equation to construct both acoustic and optical breathers. The latter compare very well with the numerically obtained breathers in the Hamiltonian limit.
Collapse
Affiliation(s)
- M M Lee
- Mathematics Department, California Polytechnic State University, San Luis Obispo, California 93407-0403, USA
| | - E G Charalampidis
- Mathematics Department, California Polytechnic State University, San Luis Obispo, California 93407-0403, USA
| | - S Xing
- Department of Mechanical Engineering, California Polytechnic State University, San Luis Obispo, California 93407-0403, USA
| | - C Chong
- Department of Mathematics, Bowdoin College, Brunswick, Maine 04011, USA
| | - P G Kevrekidis
- Department of Mathematics and Statistics, University of Massachusetts Amherst, Amherst, Massachusetts 01003-4515, USA
| |
Collapse
|
8
|
Xing S, Sun HQ, Li MC. [Clinical characteristics and risk factors of periventricular-intraventricular hemorrhage in extremely low birth weight infants]. Zhonghua Yi Xue Za Zhi 2022; 102:3774-3778. [PMID: 36517428 DOI: 10.3760/cma.j.cn112137-20220616-01323] [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: 06/17/2023]
Abstract
Objective: To analyze the clinical characteristics and risk factors of periventricular-intraventricular hemorrhage (PIVH) in extremely low birth weight infants (ELBWI). Methods: From January 2019 to January 2022, the clinical data of 238 ELBWI admitted to the intensive care unit of Henan Provincial Children's Hospital within 1 week after birth and regular head color ultrasound examination were retrospective reviewed. The infants were divided into PIVH group and non-PIVH group according to whether PIVH occurred. The incidence and time of PIVH were described, and the differences in basic clinical features, perinatal conditions, postnatal treatment and complications between the two groups were compared. The risk factors of PIVH in ELBWI were further explored by multivariate binary logistic regression analysis. Results: Among 238 ELBWI (146 males and 92 females), 82 cases (34.5%) developed PIVH, including 28 cases (11.8%) of severe PIVH and 54 cases (22.7%) of mild PIVH. Among the 82 cases of PIVH, 68 cases occurred within 3 days after birth. Gestational age [(27.4±1.5) weeks vs (27.8±1.5) weeks, P=0.012], gestational diabetes mellitus [0 vs 9.0%(14/156), P=0.005], fibrinogen (FIB) [(1.8±0.5) g/L vs (2.7±0.9) g/L, P=0.012] were lower in PIVH group than in non-PIVH group. However, intrauterine distress [46.3%(38/82) vs 11.5%(18/156), P<0.001], birth asphyxia [85.4%(70/82) vs 62.8%(98/156), P<0.001], patent ductus arteriosus (PDA) [65.9%(54/82) vs 51.3%(80/156), P=0.017], failure to withdraw invasive ventilator within 1 week [82.9%(14/82) vs 67.3%(105/156), P=0.010], use of vasoactive drugs within 1 week [28.0%(23/82) vs 15.4%(24/156), P=0.020], acidosis [28.0%(23/82) vs 12.2%(19/156), P=0.002], and hemorrhagic disease [18.3%(15/82) vs 7.1%(11/156), P=0.008] were higher in PIVH group than in non-PIVH group. Multivariate binary logistic regression analysis found that the risk factors for PIVH in ELBWI were acidosis (OR=2.257, 95%CI: 1.104-4.614, P=0.026), use of vasoactive drugs within 1 week (OR=2.274, 95%CI: 1.148-4.504, P=0.018), bleeding disorders (OR=2.583, 95%CI: 1.075-6.206, P=0.034) use of vasoactive drugs within 1 week (OR=2.301, 95%CI: 1.153-4.591, P<0.001). Conclusions: The incidence of PIVH in ELBWI is high, which mostly occurs within 3 days after birth. Acidosis, hemorrhagic disease, use of vasoactive agents within 1 week and failure to evacuate invasive ventilators within 1 week may increase the risk of PIVH in ELBWI.
Collapse
Affiliation(s)
- S Xing
- Department of Neonatology, Children's Hospital affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou 450000, China
| | - H Q Sun
- Department of Neonatology, Children's Hospital affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou 450000, China
| | - M C Li
- Department of Neonatology, Children's Hospital affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou 450000, China
| |
Collapse
|
9
|
Li W, Wang Z, Wang H, Zhang J, Wang X, Xing S, Chen S. IQGAP3 in clear cell renal cell carcinoma contributes to drug resistance and genome stability. PeerJ 2022; 10:e14201. [PMID: 36275458 PMCID: PMC9586079 DOI: 10.7717/peerj.14201] [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: 03/31/2022] [Accepted: 09/19/2022] [Indexed: 01/24/2023] Open
Abstract
Background Clear cell renal clear cell carcinoma (ccRCC) is resistant to most chemotherapeutic drugs and the molecular mechanisms have not been fully revealed. Genomic instability and the abnormal activation of bypass DNA repair pathway is the potential cause of tumor resistance to radiotherapy and chemotherapy. IQ-motif GTPase activating protein 3 (IQGAP3) regulates cell migration and intercellular adhesion. This study aims to analysis the effects of IQGAP3 expression on cell survival, genome stability and clinical prognosis in ccRCC. Methods Multiple bioinformatics analysis based on TCGA database and IHC analysis on clinical specimens were included. Quantitative real-time polymerase chain reaction (qRT-PCR) and western blot (WB) were used to determine protein expression level. MTT assay and 3D spheroid cell growth assay were used to assess cell proliferation and drug resistance in RNAi transfected ccRCC cells. Cell invasion capacity was evaluated by transwell assay. The influence of IQGAP3 on genome instability was revealed by micronuclei number and γ H2AX recruitment test. Results The highly expressed IQGAP3 in multiple subtypes of renal cell carcinoma has a clear prognostic value. Deletion of IQGAP3 inhibits cell growth in 3D Matrigel. IQGAP3 depletion lso increases accumulated DNA damage, and improves cell sensitivity to ionizing radiation and chemotherapeutic drugs. Therefore, targeting DNA damage repair function of IQGAP3 in tumorigenesis can provide ideas for the development of new targets for early diagnosis.
Collapse
Affiliation(s)
- Wen Li
- Health Science Center, School of Medicine, Shenzhen University, Shenzhen, Guangdong, China,Carson International Cancer Centre, Shenzhen University General Hospital and Shenzhen University Clinical Medical Academy Centre, Shenzhen University, Shenzhen, Guangdong, China
| | - Zhifeng Wang
- Department of Urology, Henan Provincial People’s Hospital, Zhengzhou University People’s Hospital, Henan University People’s Hospital, Zhengzhou, Henan, China
| | - Hanlin Wang
- Health Science Center, School of Medicine, Shenzhen University, Shenzhen, Guangdong, China
| | - Jian Zhang
- Department of Pharmacy, Health Science Center, Shenzhen University, Shenzhen, Guangdong, China
| | - Xiaobin Wang
- Health Science Center, School of Medicine, Shenzhen University, Shenzhen, Guangdong, China,Carson International Cancer Centre, Shenzhen University General Hospital and Shenzhen University Clinical Medical Academy Centre, Shenzhen University, Shenzhen, Guangdong, China
| | - Shaojun Xing
- Health Science Center, School of Medicine, Shenzhen University, Shenzhen, Guangdong, China,Marshall Laboratory of Biomedical Engineering, Shenzhen University, Shenzhen, Guangdong, China
| | - Si Chen
- Health Science Center, School of Medicine, Shenzhen University, Shenzhen, Guangdong, China
| |
Collapse
|
10
|
Zhang Q, Wang H, Ran C, Lyu Y, Li F, Yao Y, Xing S, Wang L, Chen S. Anti-inflammatory effects of amarogentin on 2,4-dinitrochlorobenzene-induced atopic dermatitis-like mice and in HaCat cells. Animal Model Exp Med 2022. [PMID: 36131559 DOI: 10.1002/ame2.12260] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Accepted: 06/02/2022] [Indexed: 11/07/2022] Open
Abstract
BACKGROUND Amarogentin (AMA) is a secoiridoid glycoside extracted from Swertia and Gentiana roots and exhibits many biological effects such as antioxidative, anti-inflammatory, and antitumor activities. Atopic dermatitis (AD) is a chronic inflammatory skin disease caused by disorders in the regulation of multiple inflammatory cytokines. No effective cure has been found for AD now. METHODS We constructed the HaCat and splenocyte model and tested the inhibitory effect of AMA on IL-4, IL-6, and IL-13 secretions using enzyme-linked immunosorbent assay (ELISA). The AD mouse model was constructed and treated with AMA, the severity of skin lesions was observed, epidermal tissue was collected, and epidermal thickness and mast cell infiltration were observed using hematoxylin and eosin and toluidine blue staining, respectively. The expression of kallikrein-related peptidase 7 (KLK7) and filaggrin (FLG) was detected using immunostaining and Western blot analysis. The mRNA expression of KLK7 and FLG was detected using quantitative polymerase chain reaction (qPCR). Blood immunoglobulin E (IgE) secretion was detected. RESULTS AMA inhibited IL-6 secreted by tumor necrosis factor (TNF)-α-induced HaCaT cells and reduced IL-4 and IL-13 secreted by phytohemagglutinin (PHA)-induced primary cells in the mice spleen. It was found that the treatment of AMA with 2,4-dinitrochlorobenzene-induced AD-like mice could promote the recovery of dermatitis, reduce the score of dermatitis severity and the scratching frequency, treat the skin lesions, reduce the epidermal thickness, decrease the infiltration of mast cells, reduce the IgE level in serum, decrease the expression levels of AD-related cytokines, increase protein and mRNA expression of FLG, and reduce the protein and mRNA expression of KLK7 in the skin tissues of AD-like mice. CONCLUSION In conclusion, AMA inhibits inflammatory response at the cellular level, and AMA reduces the validation response of specific dermatitis mice, relieves pruritus, and repairs the damaged skin barrier.
Collapse
Affiliation(s)
- Qian Zhang
- Department of Dermatology, The Sixth Affiliated Hospital of Shenzhen University and Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen, China
| | - Hanlin Wang
- Department of Immunology, Shenzhen University Health Science Center, Shenzhen, China
| | - Cheng Ran
- Department of Otolaryngology, Affiliate Hospital of Hebei University, Baoding, China
| | - Yansi Lyu
- Department of Dermatology, Shenzhen University General Hospital, Shenzhen University, Shenzhen, China
| | - Fei Li
- Department of Dermatology, The Sixth Affiliated Hospital of Shenzhen University and Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen, China
| | - Yihang Yao
- Department of Immunology, Shenzhen University Health Science Center, Shenzhen, China
| | - Shaojun Xing
- Department of Pathogen Biology, Shenzhen University Health Science Center, Shenzhen, China
| | - Li Wang
- Department of Dermatology, Shenzhen University General Hospital, Shenzhen University, Shenzhen, China
| | - Si Chen
- Department of Immunology, Shenzhen University Health Science Center, Shenzhen, China
| |
Collapse
|
11
|
Zhao H, Wang Q, Hu L, Xing S, Gong H, Liu Z, Qin P, Xu J, Du J, Ai W, Peng S, Li Y. Dynamic Alteration of the Gut Microbiota Associated with Obesity and Intestinal Inflammation in Ovariectomy C57BL/6 Mice. Int J Endocrinol 2022; 2022:6600158. [PMID: 35103060 PMCID: PMC8800624 DOI: 10.1155/2022/6600158] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Accepted: 01/04/2022] [Indexed: 12/14/2022] Open
Abstract
OBJECTIVE Estrogen is a critical hormone that is mainly produced by the ovary in females. Estrogen deficiency leads to various syndromes and diseases, partly due to gut microbiota alterations. Previous studies have shown that estrogen deficiency affects the gut microbiota at 6-8 weeks after ovariectomy, but the immediate effect of estrogen deficiency on the gut microbiota remains poorly understood. METHODS To investigate the short time and dynamic effects of decreased estrogen levels on the gut microbiota and their potential impact on estrogen deficiency-related diseases, we performed metagenomic sequencing of 260 fecal samples from 50 ovariectomy (OVX) and 15 control C57BL/6 female mice at four time points after surgery. RESULTS We found that seven gut microbiota species, including E. coli, Parabacteroides unclassified, Lachnospiraceae bacterium 8_1_57FAA, Bacteroides uniformis, Veillonella unclassified, Bacteroides xylanisolvens, and Firmicutes bacterium M10_2, were abundant in OVX mice. The abundance of these species increased with time after OVX surgery. The relative abundance of the opportunistic pathogen E. coli and the Crohn's disease-related Veillonella spp. was significantly correlated with mouse weight gain in the OVX group. Butyrate production and the Entner-Doudoroff pathway were significantly enriched in the control mouse group, while the degradation of glutamic acid and aspartic acid was enriched in the OVX mouse group. As the time after OVX surgery increased, the bacterial species and metabolic pathways significantly changed and tended to suggest an inflammatory environment, indicating a subhealthy state of the gut microbiota in the OVX mouse group. CONCLUSIONS Taken together, our results show that the dynamic gut microbiota profile alteration caused by estrogen deficiency is related to obesity and inflammation, which may lead to immune and metabolic disorders. This study provides new clues for the treatment of estrogen deficiency-related diseases.
Collapse
Affiliation(s)
- Hui Zhao
- Department of Clinical Laboratory, Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen 518052, China
| | - Qi Wang
- Cuiying Biomedical Research Center, Lanzhou University Second Hospital, Lanzhou 730010, Gansu, China
| | - Liqiu Hu
- Department of Spine Surgery, Shenzhen People's Hospital, Jinan University Second College of Medicine, Shenzhen 518020, China
| | - Shaojun Xing
- Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Department of Pathogen Biology, Shenzhen University Health Science Center, Shenzhen 518060, China
| | - Hui Gong
- Department of Clinical Laboratory, Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen 518052, China
| | - Zhe Liu
- Department of Computer Sciences, City University of Hong Kong, Hong Kong 999077, China
| | - Panpan Qin
- Qingdao-Europe Advanced Institute for Life Sciences, BGI-Shenzhen, Qingdao 266555, China
- Shenzhen Key Laboratory of Human Commensal Microorganisms and Health Research, BGI-Shenzhen, Shenzhen 518083, Guangdong, China
| | - Jie Xu
- Cuiying Biomedical Research Center, Lanzhou University Second Hospital, Lanzhou 730010, Gansu, China
| | - Jihui Du
- Department of Clinical Laboratory, Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen 518052, China
| | - Wen Ai
- Medical Research Center of Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen 518102, China
| | - Songlin Peng
- Department of Spine Surgery, Shenzhen People's Hospital, Jinan University Second College of Medicine, Shenzhen 518020, China
| | - Yifan Li
- Department of Clinical Laboratory, Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen 518052, China
| |
Collapse
|
12
|
Xing S, Pursley J, Shin J, Alfonso C, Domal S, Withrow J, Bolch W, Grassberger C, Paganetti H. Dynamic Hepatic Blood Flow Model Shows Greater Impact of Total Treatment Time Than Integral Dose for Assessing Dose to Circulating Lymphocytes. Int J Radiat Oncol Biol Phys 2021. [DOI: 10.1016/j.ijrobp.2021.07.466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
13
|
Abstract
Hepatocellular carcinoma (HCC), is the third leading cause of cancer-related deaths, which is largely caused by virus infection. About 80% of the virus-infected people develop a chronic infection that eventually leads to liver cirrhosis and hepatocellular carcinoma (HCC). With approximately 71 million HCV chronic infected patients worldwide, they still have a high risk of HCC in the near future. However, the mechanisms of carcinogenesis in chronic HCV infection have not been still fully understood, which involve a complex epigenetic regulation and cellular signaling pathways. Here, we summarize 18 specific gene targets and different signaling pathways involved in recent findings. With these epigenetic alterations requiring histone modifications and DNA hyper or hypo-methylation of these specific genes, the dysregulation of gene expression is also associated with different signaling pathways for the HCV life cycle and HCC. These findings provide a novel insight into a correlation between HCV infection and HCC tumorigenesis, as well as potentially preventable approaches. Hepatitis C virus (HCV) infection largely causes hepatocellular carcinoma (HCC) worldwide with 3 to 4 million newly infected cases diagnosed each year. It is urgent to explore its underlying molecular mechanisms for therapeutic treatment and biomarker discovery. However, the mechanisms of carcinogenesis in chronic HCV infection have not been still fully understood, which involve a complex epigenetic regulation and cellular signaling pathways. Here, we summarize 18 specific gene targets and different signaling pathways involved in recent findings. With these epigenetic alterations requiring histone modifications and DNA hyper or hypo-methylation of these specific genes, the dysregulation of gene expression is also associated with different signaling pathways for the HCV life cycle and HCC. These findings provide a novel insight into a correlation between HCV infection and HCC tumorigenesis, as well as potentially preventable approaches.
Collapse
Affiliation(s)
- Pin Zhao
- Guandong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen, China
| | - Samiullah Malik
- Department of Pathogen Biology, Shenzhen University Health Science Center, Shenzhen, China
| | - Shaojun Xing
- Department of Pathogen Biology, Shenzhen University Health Science Center, Shenzhen, China
| |
Collapse
|
14
|
Xing S, Ma Y, Rong L. P-260 Plasma exRNA-based identification of novel biomarkers in early gastric cancer. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.05.314] [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
|
15
|
Yu S, An J, Liao X, Wang H, Ma F, Li D, Li A, Liu W, Zhang S, Liao M, Liu L, Zhao J, Xing S, Wei L, Zhang Z. Distinct kinetics of immunoglobulin isotypes reveal early diagnosis and disease severity of COVID-19: A 6-month follow-up. Clin Transl Med 2021; 11:e342. [PMID: 33784011 PMCID: PMC7989708 DOI: 10.1002/ctm2.342] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Revised: 02/04/2021] [Accepted: 02/07/2021] [Indexed: 12/23/2022] Open
Affiliation(s)
- Siyang Yu
- Institute of Hepatology, National Clinical Research Center for Infectious Disease, Shenzhen Third People's Hospital; The Second Affiliated Hospital, School of Medicine, Southern University of Science and Technology, Shenzhen, Guangdong, China.,Microbiology Department, Harbin Medical University, Harbin, Heilongjiang, China
| | - Jianghong An
- Institute of Hepatology, National Clinical Research Center for Infectious Disease, Shenzhen Third People's Hospital; The Second Affiliated Hospital, School of Medicine, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Xuejiao Liao
- Institute of Hepatology, National Clinical Research Center for Infectious Disease, Shenzhen Third People's Hospital; The Second Affiliated Hospital, School of Medicine, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Haiyan Wang
- Institute of Hepatology, National Clinical Research Center for Infectious Disease, Shenzhen Third People's Hospital; The Second Affiliated Hospital, School of Medicine, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Fen Ma
- Microbiology Department, Harbin Medical University, Harbin, Heilongjiang, China
| | - Dapeng Li
- Institute of Hepatology, National Clinical Research Center for Infectious Disease, Shenzhen Third People's Hospital; The Second Affiliated Hospital, School of Medicine, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Aimin Li
- Center Lab of Longhua Branch, Shenzhen People's Hospital, Shenzhen, Guangdong, China
| | - Weilong Liu
- Institute of Hepatology, National Clinical Research Center for Infectious Disease, Shenzhen Third People's Hospital; The Second Affiliated Hospital, School of Medicine, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Siwei Zhang
- Microbiology Department, Harbin Medical University, Harbin, Heilongjiang, China
| | - Mingfeng Liao
- Institute of Hepatology, National Clinical Research Center for Infectious Disease, Shenzhen Third People's Hospital; The Second Affiliated Hospital, School of Medicine, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Lei Liu
- Institute of Hepatology, National Clinical Research Center for Infectious Disease, Shenzhen Third People's Hospital; The Second Affiliated Hospital, School of Medicine, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Juanjuan Zhao
- Institute of Hepatology, National Clinical Research Center for Infectious Disease, Shenzhen Third People's Hospital; The Second Affiliated Hospital, School of Medicine, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Shaojun Xing
- Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Shenzhen University Health Science Center, Shenzhen, China
| | - Lanlan Wei
- Institute of Hepatology, National Clinical Research Center for Infectious Disease, Shenzhen Third People's Hospital; The Second Affiliated Hospital, School of Medicine, Southern University of Science and Technology, Shenzhen, Guangdong, China.,Microbiology Department, Harbin Medical University, Harbin, Heilongjiang, China
| | - Zheng Zhang
- Institute of Hepatology, National Clinical Research Center for Infectious Disease, Shenzhen Third People's Hospital; The Second Affiliated Hospital, School of Medicine, Southern University of Science and Technology, Shenzhen, Guangdong, China.,Shenzhen Research Center for Communicable Disease Diagnosis and Treatment of Chinese Academy of Medical Science, Shenzhen, Guangdong, China
| |
Collapse
|
16
|
Cai Y, Dai Y, Wang Y, Yang Q, Guo J, Wei C, Chen W, Huang H, Zhu J, Zhang C, Zheng W, Wen Z, Liu H, Zhang M, Xing S, Jin Q, Feng CG, Chen X. Single-cell transcriptomics of blood reveals a natural killer cell subset depletion in tuberculosis. EBioMedicine 2020; 53:102686. [PMID: 32114394 PMCID: PMC7047188 DOI: 10.1016/j.ebiom.2020.102686] [Citation(s) in RCA: 70] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 02/09/2020] [Accepted: 02/10/2020] [Indexed: 12/14/2022] Open
Abstract
Background Tuberculosis (TB) continues to be a critical global health problem, which killed millions of lives each year. Certain circulating cell subsets are thought to differentially modulate the host immune response towards Mycobacterium tuberculosis (Mtb) infection, but the nature and function of these subsets is unclear. Methods Peripheral blood mononuclear cells (PBMC) were isolated from healthy controls (HC), latent tuberculosis infection (LTBI) and active tuberculosis (TB) and then subjected to single-cell RNA sequencing (scRNA-seq) using 10 × Genomics platform. Unsupervised clustering of the cells based on the gene expression profiles using the Seurat package and passed to tSNE for clustering visualization. Flow cytometry was used to validate the subsets identified by scRNA-Seq. Findings Cluster analysis based on differential gene expression revealed both known and novel markers for all main PBMC cell types and delineated 29 cell subsets. By comparing the scRNA-seq datasets from HC, LTBI and TB, we found that infection changes the frequency of immune-cell subsets in TB. Specifically, we observed gradual depletion of a natural killer (NK) cell subset (CD3-CD7+GZMB+) from HC, to LTBI and TB. We further verified that the depletion of CD3-CD7+GZMB+ subset in TB and found an increase in this subset frequency after anti-TB treatment. Finally, we confirmed that changes in this subset frequency can distinguish patients with TB from LTBI and HC. Interpretation We propose that the frequency of CD3-CD7+GZMB+ in peripheral blood could be used as a novel biomarker for distinguishing TB from LTBI and HC. Fund The study was supported by Natural Science Foundation of China (81770013, 81525016, 81772145, 81871255 and 91942315), National Science and Technology Major Project (2017ZX10201301), Science and Technology Project of Shenzhen (JCYJ20170412101048337) and Guangdong Provincial Key Laboratory of Regional Immunity and Diseases (2019B030301009). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
Collapse
Affiliation(s)
- Yi Cai
- Guangdong Key Laboratory of Regional Immunity and Diseases, Department of Pathogen Biology, Shenzhen University School of Medicine, Shenzhen 518000, China
| | - Youchao Dai
- Guangdong Key Laboratory of Regional Immunity and Diseases, Department of Pathogen Biology, Shenzhen University School of Medicine, Shenzhen 518000, China; Research Institute of Infectious Diseases, Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou 510000, China
| | - Yejun Wang
- Guangdong Key Laboratory of Regional Immunity and Diseases, Department of Pathogen Biology, Shenzhen University School of Medicine, Shenzhen 518000, China
| | - Qianqing Yang
- Guangdong Key Lab for Diagnosis &Treatment of Emerging Infectious Diseases, Shenzhen Third People's Hospital, Southern University of Science and Technology, Shenzhen 518000, China
| | - Jiubiao Guo
- Guangdong Key Laboratory of Regional Immunity and Diseases, Department of Pathogen Biology, Shenzhen University School of Medicine, Shenzhen 518000, China
| | - Cailing Wei
- Guangdong Key Lab for Diagnosis &Treatment of Emerging Infectious Diseases, Shenzhen Third People's Hospital, Southern University of Science and Technology, Shenzhen 518000, China
| | - Weixin Chen
- Guangdong Key Lab for Diagnosis &Treatment of Emerging Infectious Diseases, Shenzhen Third People's Hospital, Southern University of Science and Technology, Shenzhen 518000, China
| | - Huanping Huang
- Guangdong Key Laboratory of Regional Immunity and Diseases, Department of Pathogen Biology, Shenzhen University School of Medicine, Shenzhen 518000, China
| | - Jialou Zhu
- Guangdong Key Laboratory of Regional Immunity and Diseases, Department of Pathogen Biology, Shenzhen University School of Medicine, Shenzhen 518000, China
| | - Chi Zhang
- Shenzhen University General Hospital, Shenzhen University School of Medicine, Shenzhen 518000, China
| | - Weidong Zheng
- Shenzhen University General Hospital, Shenzhen University School of Medicine, Shenzhen 518000, China
| | - Zhihua Wen
- Yuebei Second People's Hospital, Shaoguan 512000, China
| | - Haiying Liu
- The MOH Key Laboratory of Systems Biology of Pathogens, Institute of Pathogen Biology, and Centre for Tuberculosis, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100176, China
| | - Mingxia Zhang
- Guangdong Key Lab for Diagnosis &Treatment of Emerging Infectious Diseases, Shenzhen Third People's Hospital, Southern University of Science and Technology, Shenzhen 518000, China
| | - Shaojun Xing
- Guangdong Key Laboratory of Regional Immunity and Diseases, Department of Pathogen Biology, Shenzhen University School of Medicine, Shenzhen 518000, China
| | - Qi Jin
- The MOH Key Laboratory of Systems Biology of Pathogens, Institute of Pathogen Biology, and Centre for Tuberculosis, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100176, China
| | - Carl G Feng
- Guangdong Key Laboratory of Regional Immunity and Diseases, Department of Pathogen Biology, Shenzhen University School of Medicine, Shenzhen 518000, China; Department of Infectious Diseases and Immunology, Sydney Medical School, the University of Sydney, Sydney, NSW 2006, Australia
| | - Xinchun Chen
- Guangdong Key Laboratory of Regional Immunity and Diseases, Department of Pathogen Biology, Shenzhen University School of Medicine, Shenzhen 518000, China.
| |
Collapse
|
17
|
He T, Xu H, Zhang Y, Yi S, Cui R, Xing S, Wei C, Lin J, Huang P. Glucose Oxidase-Instructed Traceable Self-Oxygenation/Hyperthermia Dually Enhanced Cancer Starvation Therapy. Theranostics 2020; 10:1544-1554. [PMID: 32042321 PMCID: PMC6993236 DOI: 10.7150/thno.40439] [Citation(s) in RCA: 95] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 11/04/2019] [Indexed: 12/15/2022] Open
Abstract
Cancer theranostics based on glucose oxidase (GOx)-induced starvation therapy has got more and more attention in cancer management. Herein, GOx armed manganese dioxide nanosheets (denoted as MNS-GOx) were developed as cancer nanotheranostic agent for magnetic resonance (MR)/photoacoustic (PA) dual-modal imaging guided self-oxygenation/hyperthermia dually enhanced starvation cancer therapy. The manganese dioxide nanomaterials with different morphologies (such as nanoflowers, nanosheets and nanowires) were synthesized by a biomimetic approach using melanin as a biotemplate. Afterwards, the manganese dioxide nanosheets (MNS) with two sides and large surface area were selected as the vehicle to carry and deliver GOx. The as-prepared MNS-GOx can perform the circular reaction of glucose oxidation and H2O2 decomposition for enhanced starvation therapy. Moreover, the catalytic activity of GOx could be further improved by the hyperthermia of MNS-GOx upon near-infrared laser irradiation. Most intriguingly, MNS-GOx could achieve "turn-on" MR imaging and "turn-off" PA imaging simultaneously. The theranostic capability of MNS-GOx was evaluated on A375 tumor-bearing mice with all tumor elimination. Our findings integrated molecular imaging and starvation-based synergistic cancer therapy, which provided a new platform for cancer nanotheranostics.
Collapse
Affiliation(s)
- Ting He
- Marshall Laboratory of Biomedical Engineering, International Cancer Center, Laboratory of Evolutionary Theranostics (LET), School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen 518060, China
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Han Xu
- Marshall Laboratory of Biomedical Engineering, International Cancer Center, Laboratory of Evolutionary Theranostics (LET), School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen 518060, China
| | - Yifan Zhang
- Marshall Laboratory of Biomedical Engineering, International Cancer Center, Laboratory of Evolutionary Theranostics (LET), School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen 518060, China
| | - Shijian Yi
- Department of General Surgery, Shenzhen University General Hospital, Shenzhen 518055, China
| | - Run Cui
- Marshall Laboratory of Biomedical Engineering, International Cancer Center, Laboratory of Evolutionary Theranostics (LET), School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen 518060, China
| | - Shaojun Xing
- Marshall Laboratory of Biomedical Engineering, International Cancer Center, Laboratory of Evolutionary Theranostics (LET), School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen 518060, China
| | - Chaoliang Wei
- Marshall Laboratory of Biomedical Engineering, International Cancer Center, Laboratory of Evolutionary Theranostics (LET), School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen 518060, China
| | - Jing Lin
- Marshall Laboratory of Biomedical Engineering, International Cancer Center, Laboratory of Evolutionary Theranostics (LET), School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen 518060, China
| | - Peng Huang
- Marshall Laboratory of Biomedical Engineering, International Cancer Center, Laboratory of Evolutionary Theranostics (LET), School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen 518060, China
| |
Collapse
|
18
|
Affiliation(s)
- Gongcheng Ma
- Marshall Laboratory of Biomedical Engineering, International Cancer Center, Laboratory of Evolutionary Theranostics (LET), School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen 518060, P. R. China
| | - Xiaoting Gao
- Marshall Laboratory of Biomedical Engineering, International Cancer Center, Laboratory of Evolutionary Theranostics (LET), School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen 518060, P. R. China
| | - Chao Jiang
- Marshall Laboratory of Biomedical Engineering, International Cancer Center, Laboratory of Evolutionary Theranostics (LET), School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen 518060, P. R. China
| | - Shaojun Xing
- Marshall Laboratory of Biomedical Engineering, International Cancer Center, Laboratory of Evolutionary Theranostics (LET), School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen 518060, P. R. China
| | - Chaoliang Wei
- Marshall Laboratory of Biomedical Engineering, International Cancer Center, Laboratory of Evolutionary Theranostics (LET), School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen 518060, P. R. China
| | - Peng Huang
- Marshall Laboratory of Biomedical Engineering, International Cancer Center, Laboratory of Evolutionary Theranostics (LET), School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen 518060, P. R. China
| | - Jing Lin
- Marshall Laboratory of Biomedical Engineering, International Cancer Center, Laboratory of Evolutionary Theranostics (LET), School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen 518060, P. R. China
| |
Collapse
|
19
|
Ma W, Li L, Xing S. PGE2/EP4 receptor and TRPV1 channel are involved in repeated restraint stress-induced prolongation of sensitization pain evoked by subsequent PGE2 challenge. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.482] [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: 10/25/2022]
|
20
|
Li Y, Xing S, Chen R, Zhou Z, Guo Y. The effect of oral polyethylene glycol combined with simethicone for colonoscopy on cecal intubation rate, tolerability and acceptability : a systematic review and meta-analysis. Acta Gastroenterol Belg 2019; 82:407-415. [PMID: 31566329] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
OBJECTIVE To assess the efficacy adjunction of oral simethicone to polyethylene glycol as bowel preparation agent on cecal intubation rate. METHODS We searched EMBASE, PubMed and Cochrane library for randomized controlled trials regarding simeticone plus polyethylene glycol as oral drinking agents before gastroscopy,we used the soft RevMan5.3 to perform statistical analysis and stata12.0 for publication bias. RESULTS 12 randomized trials that met the inclusion criteria were therefore pooled into a meta-analysis, which included a total of 5,112 patients. There were no significant differences on cecal intubation rate in two groups(RR=1.0,95%CI : 0.99-1.01, P=0.93) with moderate level of evidence;Subgroups analysis of 2LPEG+ Simethicone VS 2LPEG(RR =1.0, 95% CI : 0.98,1.01), 2LPEG+ Simethicone VS 4L PEG (RR=1.00, 95% CI : 0.98,1.02), PEG+ Simethicone with bisacodyl vs PEG (RR =1.00, 95% CI : 0.99,1.02), PEG+Simethicone without bisacodyl vs PEG (RR =1.00, 95% CI : 0.98,1.02) showed no difference on cecal intubation rate.There was aslo no significant difference on cecal intubation time.Abdominal bloating incidence was lower in PEG+Simethicone group than that in PEG group (RR=0.53, 95%CI : 0.31, 0.91, P=0.02). The meta-analysis result also showed a better acceptability in PEG+Simethicone group (RR=1.28, 95% CI : 1.01, 1.49, P=0.001). CONCLUSION Adjunction of oral simethicone to polyethylene glycol as bowel preparation agent dose not improve cecal intubation rate on colonoscopy,but with better gastrointestinal tolerability and acceptability.
Collapse
Affiliation(s)
- Y Li
- Department of Gastroenterology, Xiantao first People's Hospital, Xiantao City, China
| | - S Xing
- Department of Gastroenterology, Liaocheng Second People's Hospital, Liaocheng City, China
| | - R Chen
- Department of Gastroenterology, Xiantao first People's Hospital, Xiantao City, China
| | - Z Zhou
- Department of Gastroenterology, Xiantao first People's Hospital, Xiantao City, China
| | - Y Guo
- Department of Evidence-Based Medicine and Clinical Epidemiology, Zhongnan Hospital of Wuhan University, Wuhan, China
| |
Collapse
|
21
|
Liu G, Tan S, Peng K, Dang C, Xing S, Xie C, Zeng J. Network change in the ipsilesional cerebellum is correlated with motor recovery following unilateral pontine infarction. Eur J Neurol 2019; 26:1266-1273. [PMID: 31021033 DOI: 10.1111/ene.13974] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2018] [Accepted: 04/23/2019] [Indexed: 10/27/2022]
Affiliation(s)
- G. Liu
- Department of Neurology and Stroke Center The First Affiliated Hospital Sun Yat‐Sen University GuangzhouChina
| | - S. Tan
- Department of Neurology and Stroke Center The First Affiliated Hospital Sun Yat‐Sen University GuangzhouChina
| | - K. Peng
- Department of Medical Imaging State Key Laboratory of Oncology in Southern China Collaborative Innovation Center for Cancer Medicine Sun Yat‐Sen University Cancer Center Guangzhou China
| | - C. Dang
- Department of Neurology and Stroke Center The First Affiliated Hospital Sun Yat‐Sen University GuangzhouChina
| | - S. Xing
- Department of Neurology and Stroke Center The First Affiliated Hospital Sun Yat‐Sen University GuangzhouChina
| | - C. Xie
- Department of Medical Imaging State Key Laboratory of Oncology in Southern China Collaborative Innovation Center for Cancer Medicine Sun Yat‐Sen University Cancer Center Guangzhou China
| | - J. Zeng
- Department of Neurology and Stroke Center The First Affiliated Hospital Sun Yat‐Sen University GuangzhouChina
| |
Collapse
|
22
|
Liu Z, Huang Z, Yang W, Li Z, Xing S, Li H, Hu B, Li P. Expression of orphan GPR56 correlates with tumor progression in human epithelial ovarian cancer. Neoplasma 2019; 64:32-39. [PMID: 27881002 DOI: 10.4149/neo_2017_104] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
G protein-coupled receptor 56 (GPR56) has been demonstrated to be a significant prognostic predictor in several types of malignances, including melanoma, glioblastoma, breast cancer, colon cancer, and pancreatic cancer. GPR56 has a putative mucin-like extracellular domain, indicating functions for this receptor in the cell-cell interactions and triggering different downstream signaling pathways responsible for regulating cell survival, proliferation, adhesion, and migration. But the expression and clinical significance of GPR56 has not been elucidated in epithelial ovarian cancer (EOC). We detected GPR56 expression by immunohistochemistry in 110 samples of ovarian serous carcinoma to explore the correlation between its expression and clinicopathologic characteristics and overall survival. As the result, we found that GPR56 expression is significantly associated with advanced FIGO stage (P = 0.01) and positive lymph node invasion (P = 0.016), and it serves as an independent unfavorable prognostic factor through univariate and multivariate analysis. GPR56 knockdown could dramatically decrease the proliferation and invasion of epithelial ovarian cancer cells through down-regulating the RhoA-GTP level and up-regulating the E-cadherin level, which indicates GPR56 could promote the progression and invasion of EOC. In conclusion, GPR56 expression was demonstrated as an independent prognostic factor in EOC, suggesting that GPR56 may play an oncogenic role through the Rho and E-cadherin pathway and GPR56 could be a novel potential drug target in EOC.
Collapse
|
23
|
Xing S, Gai K, Li X, Shao P, Zeng Z, Zhao X, Zhao X, Chen X, Paradee WJ, Meyerholz DK, Peng W, Xue HH. Tcf1 and Lef1 are required for the immunosuppressive function of regulatory T cells. J Exp Med 2019; 216:847-866. [PMID: 30837262 PMCID: PMC6446865 DOI: 10.1084/jem.20182010] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [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: 10/24/2018] [Revised: 01/14/2019] [Accepted: 02/14/2019] [Indexed: 12/19/2022] Open
Abstract
Tcf1 and Lef1 are underexpressed in T reg cells compared with conventional CD4+ T cells. Xing et al. demonstrate that genetic ablation of both factors impairs immunosuppressive function of T reg cells and leads to spontaneous multi-organ autoimmunity. Tcf1 and Lef1 have versatile functions in regulating T cell development and differentiation, but intrinsic requirements for these factors in regulatory T (T reg) cells remain to be unequivocally defined. Specific ablation of Tcf1 and Lef1 in T reg cells resulted in spontaneous multi-organ autoimmunity that became more evident with age. Tcf1/Lef1-deficient T regs showed reduced protection against experimentally induced colitis, indicative of diminished immuno-suppressive capacity. Transcriptomic analysis revealed that Tcf1 and Lef1 were responsible for positive regulation of a subset of T reg–overrepresented signature genes such as Ikzf4 and Izumo1r. Unexpectedly, Tcf1 and Lef1 were necessary for restraining expression of cytotoxic CD8+ effector T cell–associated genes in T reg cells, including Prdm1 and Ifng. Tcf1 ChIP-seq revealed substantial overlap between Tcf1 and Foxp3 binding peaks in the T reg cell genome, with Tcf1-Foxp3 cooccupancy observed at key T reg signature and cytotoxic effector genes. Our data collectively indicate that Tcf1 and Lef1 are critical for sustaining T reg suppressive functions and preventing loss of self-tolerance.
Collapse
Affiliation(s)
- Shaojun Xing
- Departments of Microbiology and Immunology, Carver College of Medicine, University of Iowa, Iowa City, IA.,Guangdong Key Laboratory of Regional Immunity and Diseases, Department of Pathogen Biology, Shenzhen University School of Medicine, Shenzhen, Guangdong, China
| | - Kexin Gai
- Departments of Microbiology and Immunology, Carver College of Medicine, University of Iowa, Iowa City, IA
| | - Xiang Li
- Department of Physics, The George Washington University, Washington DC
| | - Peng Shao
- Departments of Microbiology and Immunology, Carver College of Medicine, University of Iowa, Iowa City, IA
| | - Zhouhao Zeng
- Department of Physics, The George Washington University, Washington DC
| | - Xudong Zhao
- Department of Otorhinolaryngology, Shengjing Hospital, China Medical University, Shenyang, China
| | - Xin Zhao
- Departments of Microbiology and Immunology, Carver College of Medicine, University of Iowa, Iowa City, IA
| | - Xia Chen
- Departments of Microbiology and Immunology, Carver College of Medicine, University of Iowa, Iowa City, IA
| | | | - David K Meyerholz
- Department of Pathology, Carver College of Medicine, University of Iowa, Iowa City, IA
| | - Weiqun Peng
- Department of Physics, The George Washington University, Washington DC
| | - Hai-Hui Xue
- Departments of Microbiology and Immunology, Carver College of Medicine, University of Iowa, Iowa City, IA .,Iowa City Veterans Affairs Health Care System, Iowa City, IA
| |
Collapse
|
24
|
Xing S, Zhang X, Liu JH, Huang X, Zhou P. Host MyD88 signaling protects against acute graft-versus-host disease after allogeneic bone marrow transplantation. Clin Exp Immunol 2018; 195:121-131. [PMID: 30317551 DOI: 10.1111/cei.13215] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Revised: 08/05/2018] [Accepted: 09/02/2018] [Indexed: 11/26/2022] Open
Abstract
Recent experimental strategies to reduce graft-versus-host disease (GVHD) have focused largely on modifying innate immunity. Toll-like receptor (TLR)-driven myeloid differentiation primary response 88 (MyD88)-dependent signalling pathways that initiate adaptive immune function are also critical for the pathogenesis of GVHD. This study aimed to delineate the role of host MyD88 in the development of acute GVHD following fully major histocompatibility complex-mismatched allogeneic bone marrow transplantation (BMT). When myeloablated BALB/c MyD88 knock-out recipients were transplanted with C57BL/6 (B6) donor cells, they developed significantly more severe GVHD than wild-type (WT) BALB/c hosts. The increased morbidity and mortality in MyD88-/- mice correlated with increased serum levels of lipopolysaccharide and elevated inflammatory cytokines in GVHD target organs. Additionally, MyD88 deficiency in BMT recipients led to increased donor T cell expansion and more donor CD11c+ cell intestinal infiltration with apoptotic cells but reduced proliferation of intestinal epithelial cells compared with that in WT BMT recipients. Decreased expression of tight junction mRNA in epithelial cells of MyD88-/- mice suggested that MyD88 contributes to intestinal integrity. Cox-2 expression in the GVHD-targeted organs of WT mice is increased upon GVHD induction, but this enhanced expression was obviously inhibited by MyD88 deficiency. The present findings demonstrate an unexpected role for host MyD88 in preventing GVHD after allogeneic BMT.
Collapse
Affiliation(s)
- S Xing
- Department of Gastroenterology, Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, Hubei, China.,Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology,Key Laboratory of Organ Transplantation, Ministry of Health and Key Laboratory of Organ Transplantation, Ministry of Education, Wuhan, China
| | - X Zhang
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology,Key Laboratory of Organ Transplantation, Ministry of Health and Key Laboratory of Organ Transplantation, Ministry of Education, Wuhan, China.,Department of Breast Surgery, Renmin hospital of Wuhan University, Wuhan University, Wuhan, China
| | - J H Liu
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology,Key Laboratory of Organ Transplantation, Ministry of Health and Key Laboratory of Organ Transplantation, Ministry of Education, Wuhan, China
| | - X Huang
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology,Key Laboratory of Organ Transplantation, Ministry of Health and Key Laboratory of Organ Transplantation, Ministry of Education, Wuhan, China
| | - P Zhou
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology,Key Laboratory of Organ Transplantation, Ministry of Health and Key Laboratory of Organ Transplantation, Ministry of Education, Wuhan, China
| |
Collapse
|
25
|
Xing S, Shao P, Li F, Zhao X, Seo W, Wheat JC, Ramasamy S, Wang J, Li X, Peng W, Yu S, Liu C, Taniuchi I, Sweetser DA, Xue HH. Tle corepressors are differentially partitioned to instruct CD8 + T cell lineage choice and identity. J Exp Med 2018; 215:2211-2226. [PMID: 30045946 PMCID: PMC6080905 DOI: 10.1084/jem.20171514] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [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: 08/17/2017] [Revised: 03/05/2018] [Accepted: 06/29/2018] [Indexed: 01/15/2023] Open
Abstract
Xing et al demonstrate the requirements for Tle transcriptional corepressors in CD8+ T cell development. Tle proteins are differentially partitioned to the Runx and Tcf/Lef complexes to promote CD8+ lineage choice and establish CD8+ T cell identity, respectively. Tle/Groucho proteins are transcriptional corepressors interacting with Tcf/Lef and Runx transcription factors, but their physiological roles in T cell development remain unknown. Conditional targeting of Tle1, Tle3 and Tle4 revealed gene dose–dependent requirements for Tle proteins in CD8+ lineage cells. Upon ablating all three Tle proteins, generation of CD8+ T cells was greatly diminished, largely owing to redirection of MHC-I–selected thymocytes to CD4+ lineage; the remaining CD8-positive T cells showed aberrant up-regulation of CD4+ lineage-associated genes including Cd4, Thpok, St8sia6, and Foxp3. Mechanistically, Tle3 bound to Runx-occupied Thpok silencer, in post-selection double-positive thymocytes to prevent excessive ThPOK induction and in mature CD8+ T cells to silence Thpok expression. Tle3 also bound to Tcf1-occupied sites in a few CD4+ lineage-associated genes, including Cd4 silencer and St8sia6 introns, to repress their expression in mature CD8+ T cells. These findings indicate that Tle corepressors are differentially partitioned to Runx and Tcf/Lef complexes to instruct CD8+ lineage choice and cooperatively establish CD8+ T cell identity, respectively.
Collapse
Affiliation(s)
- Shaojun Xing
- Department of Microbiology and Immunology, Carver College of Medicine, University of Iowa, Iowa City, IA
| | - Peng Shao
- Department of Microbiology and Immunology, Carver College of Medicine, University of Iowa, Iowa City, IA
| | - Fengyin Li
- Department of Microbiology and Immunology, Carver College of Medicine, University of Iowa, Iowa City, IA
| | - Xudong Zhao
- Department of Microbiology and Immunology, Carver College of Medicine, University of Iowa, Iowa City, IA
| | - Wooseok Seo
- Laboratory for Transcriptional Regulation, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - Justin C Wheat
- Department of Pediatrics, Divisions of Medical Genetics and Pediatric Hematology/Oncology, Center for Genetics Research and MGH Cancer Center, Massachusetts General Hospital, Boston, MA
| | - Selvi Ramasamy
- Department of Pediatrics, Divisions of Medical Genetics and Pediatric Hematology/Oncology, Center for Genetics Research and MGH Cancer Center, Massachusetts General Hospital, Boston, MA
| | - Jianfeng Wang
- Department of Pediatrics, Divisions of Medical Genetics and Pediatric Hematology/Oncology, Center for Genetics Research and MGH Cancer Center, Massachusetts General Hospital, Boston, MA
| | - Xiang Li
- Department of Physics, The George Washington University, Washington, DC
| | - Weiqun Peng
- Department of Physics, The George Washington University, Washington, DC
| | - Shuyang Yu
- Department of Microbiology and Immunology, Carver College of Medicine, University of Iowa, Iowa City, IA
| | - Chengyu Liu
- Transgenic Core Facility, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD
| | - Ichiro Taniuchi
- Laboratory for Transcriptional Regulation, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - David A Sweetser
- Department of Pediatrics, Divisions of Medical Genetics and Pediatric Hematology/Oncology, Center for Genetics Research and MGH Cancer Center, Massachusetts General Hospital, Boston, MA
| | - Hai-Hui Xue
- Department of Microbiology and Immunology, Carver College of Medicine, University of Iowa, Iowa City, IA
| |
Collapse
|
26
|
Liu Y, Zhang YY, Kou QW, Chen Y, Han DL, Wang DD, Lu ZY, Chen L, Yang JH, Xing S. Eco-friendly seeded Fe3O4-Ag nanocrystals: a new type of highly efficient and low cost catalyst for methylene blue reduction. RSC Adv 2018; 8:2209-2218. [PMID: 35542618 PMCID: PMC9077205 DOI: 10.1039/c7ra11348j] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2017] [Accepted: 01/03/2018] [Indexed: 12/17/2022] Open
Abstract
Hybrid Fe3O4-Ag nanocrystals, a new type of highly efficient and reusable catalyst for methylene blue (MB) reduction, are fabricated by a novel seed deposition process. X-ray diffraction and Mössbauer spectroscopy results show that the developed iron oxides are in a pure magnetite Fe3O4 phase. Upon manipulating the amount of Ag seeds capsuled on the modified surfaces of Fe3O4 nanocrystals, the catalytic capacities on the reduction of MB can be precisely adjusted with a tunable fabrication cost control. The linear correlation of the reduced MB concentration versus reaction time catalyzed by our developed hybrid Fe3O4-Ag nanocrystals is coherent with pseudo first order kinetics. Importantly, with remarkable recyclability features, the hybrid Fe3O4-Ag nanocrystals can be easily separated by applying an external magnetic field. The tailored catalytic performances of the hybrid Fe3O4-Ag nanocrystals during MB reduction are attributed to the optimized dynamic electron transfer process, which dominates the electrochemical mechanism wherein the nucleophilic BH4− ions donate electrons to electrophilic organic MB through Ag seeds in a regulated amount. Such developed hybrid Fe3O4-Ag nanocrystals pave the way towards the mass production of highly efficient and low cost catalysts for methylene blue reduction. Hybrid Fe3O4-Ag nanocrystals, a new type of highly efficient and reusable catalyst for methylene blue (MB) reduction, are fabricated by a novel seed deposition process.![]()
Collapse
Affiliation(s)
- Y. Liu
- College of Physics
- Jilin Normal University
- Siping 136000
- China
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education
| | - Y. Y. Zhang
- College of Physics
- Jilin Normal University
- Siping 136000
- China
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education
| | - Q. W. Kou
- College of Physics
- Jilin Normal University
- Siping 136000
- China
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education
| | - Y. Chen
- College of Physics
- Jilin Normal University
- Siping 136000
- China
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education
| | - D. L. Han
- School of Materials Science and Engineering
- Changchun University of Science and Technology
- Changchun 130022
- China
| | - D. D. Wang
- Technology Development Department
- GLOBALFOUNDRIES (Singapore) Pte. Ltd
- Singapore 738406
- Singapore
| | - Z. Y. Lu
- School of Environment and Safety Engineering
- Jiangsu University
- Zhenjiang 212013
- China
| | - L. Chen
- College of Physics
- Jilin Normal University
- Siping 136000
- China
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education
| | - J. H. Yang
- College of Physics
- Jilin Normal University
- Siping 136000
- China
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education
| | - S. Xing
- United Microelect Corp. Ltd
- Singapore 519528
- Singapore
| |
Collapse
|
27
|
Affiliation(s)
- S Xing
- Respiratory Department, The Central Hospital of Linyi, Linyi, China
| | - Y Zhu
- Respiratory Department, The Central Hospital of Linyi, Linyi, China
| | - Y Sun
- Chest Surgery Department, The Central Hospital of Linyi, Linyi, China
| |
Collapse
|
28
|
Gullicksrud JA, Li F, Xing S, Zeng Z, Peng W, Badovinac VP, Harty JT, Xue HH. Differential Requirements for Tcf1 Long Isoforms in CD8 + and CD4 + T Cell Responses to Acute Viral Infection. J Immunol 2017; 199:911-919. [PMID: 28652395 DOI: 10.4049/jimmunol.1700595] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Accepted: 06/07/2017] [Indexed: 12/11/2022]
Abstract
In response to acute viral infection, activated naive T cells give rise to effector T cells that clear the pathogen and memory T cells that persist long-term and provide heightened protection. T cell factor 1 (Tcf1) is essential for several of these differentiation processes. Tcf1 is expressed in multiple isoforms, with all isoforms sharing the same HDAC and DNA-binding domains and the long isoforms containing a unique N-terminal β-catenin-interacting domain. In this study, we specifically ablated Tcf1 long isoforms in mice, while retaining expression of Tcf1 short isoforms. During CD8+ T cell responses, Tcf1 long isoforms were dispensable for generating cytotoxic CD8+ effector T cells and maintaining memory CD8+ T cell pool size, but they contributed to optimal maturation of central memory CD8+ T cells and their optimal secondary expansion in a recall response. In contrast, Tcf1 long isoforms were required for differentiation of T follicular helper (TFH) cells, but not TH1 effectors, elicited by viral infection. Although Tcf1 short isoforms adequately supported Bcl6 and ICOS expression in TFH cells, Tcf1 long isoforms remained important for suppressing the expression of Blimp1 and TH1-associated genes and for positively regulating Id3 to restrain germinal center TFH cell differentiation. Furthermore, formation of memory TH1 and memory TFH cells strongly depended on Tcf1 long isoforms. These data reveal that Tcf1 long and short isoforms have distinct, yet complementary, functions and may represent an evolutionarily conserved means to ensure proper programming of CD8+ and CD4+ T cell responses to viral infection.
Collapse
Affiliation(s)
- Jodi A Gullicksrud
- Department of Microbiology, University of Iowa, Iowa City, IA 52242.,Interdisciplinary Immunology Graduate Program, University of Iowa, Iowa City, IA 52242
| | - Fengyin Li
- Department of Microbiology, University of Iowa, Iowa City, IA 52242
| | - Shaojun Xing
- Department of Microbiology, University of Iowa, Iowa City, IA 52242
| | - Zhouhao Zeng
- Department of Physics, The George Washington University, Washington, DC 20052; and
| | - Weiqun Peng
- Department of Physics, The George Washington University, Washington, DC 20052; and
| | - Vladimir P Badovinac
- Department of Microbiology, University of Iowa, Iowa City, IA 52242.,Interdisciplinary Immunology Graduate Program, University of Iowa, Iowa City, IA 52242.,Department of Pathology, Carver College of Medicine, University of Iowa, Iowa City, IA 52242
| | - John T Harty
- Department of Microbiology, University of Iowa, Iowa City, IA 52242.,Interdisciplinary Immunology Graduate Program, University of Iowa, Iowa City, IA 52242
| | - Hai-Hui Xue
- Department of Microbiology, University of Iowa, Iowa City, IA 52242; .,Interdisciplinary Immunology Graduate Program, University of Iowa, Iowa City, IA 52242
| |
Collapse
|
29
|
Xu Z, Xing S, Shan Q, Gullicksrud JA, Bair TB, Du Y, Liu C, Xue HH. Cutting Edge: β-Catenin-Interacting Tcf1 Isoforms Are Essential for Thymocyte Survival but Dispensable for Thymic Maturation Transitions. J Immunol 2017; 198:3404-3409. [PMID: 28348272 DOI: 10.4049/jimmunol.1602139] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Accepted: 03/05/2017] [Indexed: 11/19/2022]
Abstract
T cell factor 1 (Tcf1) is essential for T cell development; however, it remains controversial whether β-catenin, a known coactivator of Tcf1, has a role. Tcf1 is expressed in multiple isoforms in T lineage cells, with the long isoforms interacting with β-catenin through an N-terminal domain. In this study, we specifically ablated Tcf1 long isoforms in mice (p45-/-mice) to abrogate β-catenin interaction. Although thymic cellularity was diminished in p45-/- mice, transition of thymocytes through the maturation stages was unaffected, with no overt signs of developmental blocks. p45-/- thymocytes showed increased apoptosis and alterations in transcriptome, but these changes were substantially more modest than in thymocytes lacking all Tcf1 isoforms. These data indicate that Tcf1-β-catenin interaction is necessary for promoting thymocyte survival to maintain thymic output. Rather than being dominant-negative regulators, Tcf1 short isoforms are adequate in supporting developing thymocytes to traverse through maturation steps and in regulating the expression of most Tcf1 target genes.
Collapse
Affiliation(s)
- Zhe Xu
- Department of Microbiology, Carver College of Medicine, University of Iowa, Iowa City, IA 52242
| | - Shaojun Xing
- Department of Microbiology, Carver College of Medicine, University of Iowa, Iowa City, IA 52242
| | - Qiang Shan
- Department of Microbiology, Carver College of Medicine, University of Iowa, Iowa City, IA 52242
| | - Jodi A Gullicksrud
- Department of Microbiology, Carver College of Medicine, University of Iowa, Iowa City, IA 52242.,Interdisciplinary Immunology Graduate Program, University of Iowa, Iowa City, IA 52242
| | - Thomas B Bair
- Iowa Institute of Human Genetics, Carver College of Medicine, University of Iowa, Iowa City, IA 52242; and
| | - Yubin Du
- Transgenic Core Facility, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20892
| | - Chengyu Liu
- Transgenic Core Facility, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20892
| | - Hai-Hui Xue
- Department of Microbiology, Carver College of Medicine, University of Iowa, Iowa City, IA 52242; .,Interdisciplinary Immunology Graduate Program, University of Iowa, Iowa City, IA 52242
| |
Collapse
|
30
|
Xing S, Sharp LK, Touchette DR. Weight loss drugs and lifestyle modification: Perceptions among a diverse adult sample. Patient Educ Couns 2017; 100:592-597. [PMID: 27847132 DOI: 10.1016/j.pec.2016.11.004] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 09/26/2016] [Accepted: 11/08/2016] [Indexed: 06/06/2023]
Abstract
OBJECTIVES Explore how adults from diverse racial and socioeconomic backgrounds perceive the use of weight loss drugs (prescription, over-the counter, herbals and supplements) and lifestyle modification. METHODS Individual, face-to-face, semi-structured interviews were conducted with persons presenting to an academic hospital-affiliated outpatient pharmacy serving ethnic minorities and low income individuals. RESULTS Fifty persons were interviewed, including 21 African Americans, 11 Hispanics and 17 low-income individuals (annual income <$20,000), of whom 33 self-reported as overweight or obese. Ever-users (14/50) and nonusers (36/50) of weight loss drugs expressed a belief in the importance of diet and exercise, but were not necessarily doing so themselves. Fear of side effects and skepticism towards efficacy of drugs deterred use. Some expressed concern over herbal product safety; others perceived herbals as natural and safe. Drugs were often viewed as a short-cut and not a long-term weight management solution. CONCLUSION A range of concerns related to the safety and efficacy of weight loss drugs were expressed by this lower income, ethnically diverse population of underweight to obese adults. PRACTICE IMPLICATIONS There is need and opportunity for healthcare providers to provide weight loss advice and accurate information regarding the safety and efficacy of various types of weight loss approaches.
Collapse
Affiliation(s)
- S Xing
- University of Illinois at Chicago Department of Pharmacy Systems, Outcomes and Policy, Chicago, IL, 833 South Wood St (MC 871), 60612-7230, USA.
| | - L K Sharp
- University of Illinois at Chicago Department of Pharmacy Systems, Outcomes and Policy, Chicago, IL, 833 South Wood St (MC 871), 60612-7230, USA.
| | - D R Touchette
- University of Illinois at Chicago Department of Pharmacy Systems, Outcomes and Policy, Chicago, IL, 833 South Wood St (MC 871), 60612-7230, USA.
| |
Collapse
|
31
|
He B, Xing S, Chen C, Gao P, Teng L, Shan Q, Gullicksrud JA, Martin MD, Yu S, Harty JT, Badovinac VP, Tan K, Xue HH. CD8 + T Cells Utilize Highly Dynamic Enhancer Repertoires and Regulatory Circuitry in Response to Infections. Immunity 2016; 45:1341-1354. [PMID: 27986453 DOI: 10.1016/j.immuni.2016.11.009] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Revised: 08/16/2016] [Accepted: 10/25/2016] [Indexed: 11/30/2022]
Abstract
Differentiation of effector and memory CD8+ T cells is accompanied by extensive changes in the transcriptome and histone modifications at gene promoters; however, the enhancer repertoire and associated gene regulatory networks are poorly defined. Using histone mark chromatin immunoprecipitation coupled with deep sequencing, we mapped the enhancer and super-enhancer landscapes in antigen-specific naive, differentiated effector, and central memory CD8+ T cells during LCMV infection. Epigenomics-based annotation revealed a highly dynamic repertoire of enhancers, which were inherited, de novo activated, decommissioned and re-activated during CD8+ T cell responses. We employed a computational algorithm to pair enhancers with target gene promoters. On average, each enhancer targeted three promoters and each promoter was regulated by two enhancers. By identifying enriched transcription factor motifs in enhancers, we defined transcriptional regulatory circuitry at each CD8+ T cell response stage. These multi-dimensional datasets provide a blueprint for delineating molecular mechanisms underlying functional differentiation of CD8+ T cells.
Collapse
Affiliation(s)
- Bing He
- Division of Oncology and Center for Childhood Cancer Research, Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA; Department of Biomedical and Health Informatics, Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - Shaojun Xing
- Department of Microbiology, Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA
| | - Changya Chen
- Interdisciplinary Graduate Program in Genetics, University of Iowa, Iowa City, IA 52242, USA
| | - Peng Gao
- Division of Oncology and Center for Childhood Cancer Research, Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA; Department of Biomedical and Health Informatics, Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - Li Teng
- Illumina Inc., San Diego, CA 92122, USA
| | - Qiang Shan
- Department of Microbiology, Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA
| | - Jodi A Gullicksrud
- Department of Microbiology, Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA; Interdisciplinary Immunology Graduate Program, University of Iowa, Iowa City, IA 52242, USA
| | - Matthew D Martin
- Department of Pathology, Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA; Interdisciplinary Immunology Graduate Program, University of Iowa, Iowa City, IA 52242, USA
| | - Shuyang Yu
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, P.R. China 100193
| | - John T Harty
- Department of Microbiology, Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA; Interdisciplinary Immunology Graduate Program, University of Iowa, Iowa City, IA 52242, USA
| | - Vladimir P Badovinac
- Department of Pathology, Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA; Interdisciplinary Immunology Graduate Program, University of Iowa, Iowa City, IA 52242, USA
| | - Kai Tan
- Division of Oncology and Center for Childhood Cancer Research, Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA; Department of Biomedical and Health Informatics, Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA; Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
| | - Hai-Hui Xue
- Department of Microbiology, Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA; Interdisciplinary Immunology Graduate Program, University of Iowa, Iowa City, IA 52242, USA; Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
| |
Collapse
|
32
|
Zhu X, Wang M, Xing S, Yang Z, Mao Y. 0348 The polymorphisms of Toll-like receptor 4 gene influences milk production traits in Chinese Holstein cows. J Anim Sci 2016. [DOI: 10.2527/jam2016-0348] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
33
|
Gao YZ, Xing S, Gao K, Zhang JY, Yu ZZ, Shi XJ, Wang HW. [Posterior debridement combined with atlantoaxial fusion to upper cervical tuberculosis]. Zhonghua Wai Ke Za Zhi 2016; 54:451-455. [PMID: 27938580 DOI: 10.3760/cma.j.issn.0529-5815.2016.06.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To explore clinical results of posterior debridement combined with atlantoaxial fusion for upper cervical Tuberculosis. Methods: From March 2007 to April 2012, 8 patients with upper cervical Tuberculosis underwent posterior debridement combined with atlantoaxial fusion in our hospital were selected for retrospective analysis. 3 cases were males and 5 females, aged 29-65 (43.5±13.2) years. According to the pedicle destruction, using different screws (pedicle screw or laminar screw) fixation.In the preoperative and final follow-up, Japanese Orthopaedic Association score (JOA) and neck disability index (NDI) were used to evaluate neurological function and calculate improvement rate JOA score. At final follow-up, clinical efficacy was evaluated by Odom's grade. situation of internal fixation, fusion of upper cervical were assessed by imaging examination. During follow-up, complications were documented and analyzed. Results: Postoperatively 12 months, all bony fusion were achieved. Tuberculosis were reached clinical cure in 12-18 months. The JOA score increased from 10.5±2.0 preoperatively to 15.6 ±1.1 in final follow-up(P<0.05), and the NDI decreased from 29.9 ± 6.2 preoperatively to 8.6±1.6 (P<0.05). At last follow-up, according to Odom's standard, excellent were obtained in 6 cases (75.0%), good 1 cases (12.5%) and ordinary 1 case (12.5%). No severe complications was documented during follow-up. Conclusions: The treatment of posterior debridement combine with atlantoaxial fusion, and structure grafting and local anti-Tuberculosis drug using intraoperative, not only could obtain reliable clinical efficacy, completely removal of lesions, but also obtain strong stability, which plays an important role in the treatment of cervical tuberculosis.
Collapse
Affiliation(s)
- Y Z Gao
- Orthopaedic Department of the People's Hospital of Zhengzhou University (Henan Provincial People's Hospital) , Zhengzhou 450003, China
| | | | | | | | | | | | | |
Collapse
|
34
|
Gao YZ, Xing S, Gao K, Shi XG, Zhang JY, Yu ZZ, Kang YS. [Anterior retropharyngeal debridement combined with posterior atlantoaxial fusion for atlantoaxial Tuberculosis]. Zhonghua Yi Xue Za Zhi 2016; 96:1495-9. [PMID: 27266494 DOI: 10.3760/cma.j.issn.0376-2491.2016.19.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To evaluate the clinical efficacy of anterior debridement combined with posterior atlantoaxial fusion for atlantoaxial Tuberculosis. METHODS From February 2005 to February 2013, 7 patients, 3 males and 4 females, with atlantoaxial Tuberculosis underwent anterior debridement combined with posterior atlantoaxial fusion in Department of Orthopedics Zhengzhou University People's Hospital were selected.In the preoperative and final follow-up, Japanese Orthopaedic Association score (JOA), neck disability index (NDI) and Frankel Classification were used to evaluate neurological function and calculate improvement rate.At final follow-up, clinical efficacy was evaluated by Odom's grade.Situation of internal fixation, fusion of upper cervical were assessed by X-ray, CT scan and MRI scan. RESULTS Bony fusion were achieved in 7 cases after operation in 12 months. Tuberculosis were reached clinical cure between 17 and 21 months. At follow The JOA score increased from (11.1±0.7) preoperatively to (15.3±0.5) in final follow-up(P<0.05), and the NDI decreased from (34.0±4.6) preoperatively to (10.1±1.3) in final follow-up (P<0.05). At last follow-up, according to Odom's standard, excellent were obtained in 5 cases, good 1 cases and ordinary 1 case. Frankel Classification of all cases improved from D class to E. CONCLUSIONS The treatment of anterior retropharyngeal debridement combine with atlantoaxial fusion, and local anti-tuberculosis drug using intraoperative, not only could obtain reliable clinical efficacy, completly removal of lesions, but also obtain strong stability, which plays an important role in the treatment of atlantoaxial Tuberculosis.
Collapse
Affiliation(s)
- Y Z Gao
- Department of Orthopedics, Henan Provincial People's Hospital (Zhengzhou University People's Hospital), Zhengzhou 450003, China
| | | | | | | | | | | | | |
Collapse
|
35
|
Xing S, Li F, Zeng Z, Zhao Y, Yu S, Shan Q, Li Y, Phillips FC, Maina PK, Qi HH, Liu C, Zhu J, Pope RM, Musselman CA, Zeng C, Peng W, Xue HH. Tcf1 and Lef1 transcription factors establish CD8(+) T cell identity through intrinsic HDAC activity. Nat Immunol 2016; 17:695-703. [PMID: 27111144 PMCID: PMC4873337 DOI: 10.1038/ni.3456] [Citation(s) in RCA: 156] [Impact Index Per Article: 19.5] [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: 11/06/2015] [Accepted: 03/30/2016] [Indexed: 02/06/2023]
Abstract
The CD4+ and CD8+ T cell dichotomy is essential for effective cellular immunity. How the individual T cell identity is established remains poorly understood. Here we show that the high mobility group (HMG) transcription factors Tcf1 and Lef1 are essential for repressing CD4+ lineage-associated genes including Cd4, Foxp3 and Rorc in CD8+ T cells. Tcf1- and Lef1-deficient CD8+ T cells exhibit histone hyperacetylation, which is ascribed to an unexpected intrinsic histone deacetylase (HDAC) activity in Tcf1 and Lef1. Mutating five conserved amino acids in the Tcf1 HDAC domain diminishes the HDAC activity and the ability to suppress CD4+ lineage genes in CD8+ T cells. These findings reveal that sequence-specific transcription factors can utilize intrinsic HDAC activity to guard cell identity by repressing lineage-inappropriate genes.
Collapse
Affiliation(s)
- Shaojun Xing
- Department of Microbiology, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
| | - Fengyin Li
- Department of Microbiology, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
| | - Zhouhao Zeng
- Department of Physics, The George Washington University, Washington, DC, USA
| | - Yunjie Zhao
- Department of Physics, The George Washington University, Washington, DC, USA
| | - Shuyang Yu
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Qiang Shan
- Department of Microbiology, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
| | - Yalan Li
- Proteomics Facility, University of Iowa, Iowa City, Iowa, USA
| | - Farrah C Phillips
- Department of Microbiology, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA.,Interdisciplinary Immunology Graduate Program, University of Iowa, Iowa City, Iowa, USA
| | - Peterson K Maina
- Department of Anatomy and Cell Biology, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
| | - Hank H Qi
- Department of Anatomy and Cell Biology, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
| | - Chengyu Liu
- Transgenic Core Facility, NHLBI, National Institutes of Health, Bethesda, Maryland, USA
| | - Jun Zhu
- Systems Biology Center, NHLBI, National Institutes of Health, Bethesda, Maryland, USA
| | - R Marshall Pope
- Proteomics Facility, University of Iowa, Iowa City, Iowa, USA
| | - Catherine A Musselman
- Department of Biochemistry, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
| | - Chen Zeng
- Department of Physics, The George Washington University, Washington, DC, USA
| | - Weiqun Peng
- Department of Physics, The George Washington University, Washington, DC, USA
| | - Hai-Hui Xue
- Department of Microbiology, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA.,Interdisciplinary Immunology Graduate Program, University of Iowa, Iowa City, Iowa, USA
| |
Collapse
|
36
|
Yu S, Li F, Xing S, Zhao T, Peng W, Xue HH. Hematopoietic and Leukemic Stem Cells Have Distinct Dependence on Tcf1 and Lef1 Transcription Factors. J Biol Chem 2016; 291:11148-60. [PMID: 27044748 DOI: 10.1074/jbc.m116.717801] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Indexed: 12/31/2022] Open
Abstract
Hematopoietic and leukemic stem cells (HSCs and LSCs) have self-renewal ability to maintain normal hematopoiesis and leukemia propagation, respectively. Tcf1 and Lef1 transcription factors are expressed in HSCs, and targeting both factors modestly expanded the size of the HSC pool due to diminished HSC quiescence. Functional defects of Tcf1/Lef1-deficient HSCs in multi-lineage blood reconstitution was only evident under competitive conditions or when subjected to repeated regenerative stress. These are mechanistically due to direct positive regulation of Egr and Tcf3 by Tcf1 and Lef1, and significantly, forced expression of Egr1 in Tcf1/Lef1-deficient HSCs restored HSC quiescence. In a preclinical CML model, loss of Tcf1/Lef1 did not show strong impact on leukemia initiation and progression. However, when transplanted into secondary recipients, Tcf1/Lef1-deficient LSCs failed to propagate CML. By induced deletion of Tcf1 and Lef1 in pre-established CML, we further demonstrated an intrinsic requirement for these factors in LSC self-renewal. When combined with imatinib therapy, genetic targeting of Tcf1 and Lef1 potently diminished LSCs and conferred better protection to the CML recipients. LSCs are therefore more sensitive to loss of Tcf1 and Lef1 than HSCs in their self-renewal capacity. The differential requirements in HSCs and LSCs thus identify Tcf1 and Lef1 transcription factors as novel therapeutic targets in treating hematological malignancies, and inhibition of Tcf1/Lef1-regulated transcriptional programs may thus provide a therapeutic window to eliminate LSCs with minimal side effect on normal HSC functions.
Collapse
Affiliation(s)
- Shuyang Yu
- From the State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China,
| | - Fengyin Li
- Department of Microbiology, Carver College of Medicine, University of Iowa, Iowa City, Iowa 52242
| | - Shaojun Xing
- Department of Microbiology, Carver College of Medicine, University of Iowa, Iowa City, Iowa 52242
| | - Tianyan Zhao
- From the State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Weiqun Peng
- Department of Physics, The George Washington University, Washington, D. C. 20052, and
| | - Hai-Hui Xue
- Department of Microbiology, Carver College of Medicine, University of Iowa, Iowa City, Iowa 52242
| |
Collapse
|
37
|
Vallieres M, Freeman C, Ahmed Z, Turcotte R, Hickeson M, Skamene S, Jeyaseelan K, Hathout L, Serban M, Xing S, Powell T, Seuntjens J, Levesque I, El Naqa I. Early Assessment of Tumor Aggressiveness Using Joint FDG-PET/MRI Textural Features: Prediction of Prospective Cohort and Potential Improvement Using Hypoxia and Perfusion Biomarkers. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.020] [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: 10/22/2022]
|
38
|
Liu G, Dang C, Peng K, Xie C, Chen H, Xing S, Chen X, Zeng J. Increased spontaneous neuronal activity in structurally damaged cortex is correlated with early motor recovery in patients with subcortical infarction. Eur J Neurol 2015; 22:1540-7. [PMID: 26453239 DOI: 10.1111/ene.12780] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Accepted: 06/05/2015] [Indexed: 11/26/2022]
Abstract
BACKGROUND AND PURPOSE Secondary cortical thinning and volumetric atrophy in the motor-related cortex can inhibit early functional recovery after subcortical infarction. However, the relationship between the spontaneous neuronal activity in these cortices and motor recovery in patients with focal cerebral infarct remains unknown. METHODS Structural magnetic resonance imaging (MRI) and resting-state functional MRI were conducted 1, 4 and 12 weeks after onset in 22 patients with an acute subcortical infarct and in 22 normal subjects. Group differences in cortical thickness and in the amplitude of low-frequency fluctuation (ALFF) in motor-related areas were evaluated, and the relationships between ALFF, cortical thickness changes and changes in the Fugl-Meyer scores of physical performance were further analyzed. RESULTS In patients with subcortical infarction, progressively decreasing cortical thickness was found over the observation period ipsilesionally in the primary motor cortex (PMC), supplementary motor cortex (SMC) and precuneus (all P < 0.05). Contralesionally, progressive increases in cortical thickness were detected in SMC and insula (all P < 0.05). Increases in ALFF were observed only in PMC (bilaterally) and only at 12 weeks after stroke (all P < 0.05). The cortical thickness changes in the contralesional SMC (rs = 0.483, P = 0.023) and the ALFF changes in bilateral PMC (ipsilesional, rs = 0.51, P = 0.015; contralesional, rs = 0.463, P = 0.03) were positively correlated with changes in the Fugl-Meyer scores. CONCLUSIONS These results suggest that increased spontaneous neuronal activity of the PMC, a region structurally damaged secondarily to ischaemic lesion, may contribute to early motor recovery in patients with subcortical infarction.
Collapse
Affiliation(s)
- G Liu
- Department of Neurology and Stroke Center, First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - C Dang
- Department of Neurology and Stroke Center, First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - K Peng
- State Key Laboratory of Oncology in Southern China, Imaging Diagnosis and Interventional Center, Cancer Center of Sun Yat-Sen University, Guangzhou, China
| | - C Xie
- State Key Laboratory of Oncology in Southern China, Imaging Diagnosis and Interventional Center, Cancer Center of Sun Yat-Sen University, Guangzhou, China
| | - H Chen
- Department of Neurology and Stroke Center, First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - S Xing
- Department of Neurology and Stroke Center, First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - X Chen
- Department of Neurology and Stroke Center, First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - J Zeng
- Department of Neurology and Stroke Center, First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| |
Collapse
|
39
|
Yang Q, Li F, Harly C, Xing S, Ye L, Xia X, Wang H, Wang X, Yu S, Zhou X, Cam M, Xue HH, Bhandoola A. TCF-1 upregulation identifies early innate lymphoid progenitors in the bone marrow. Nat Immunol 2015; 16:1044-50. [PMID: 26280998 PMCID: PMC4575643 DOI: 10.1038/ni.3248] [Citation(s) in RCA: 199] [Impact Index Per Article: 22.1] [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: 06/16/2015] [Accepted: 07/15/2015] [Indexed: 02/07/2023]
Abstract
The cellular and molecular events that drive early innate lympoid cell (ILC) development remain poorly understood. We show that transcription factor TCF-1 is required for the efficient generation of all known adult ILC subsets and their precursors. Using novel reporter mice, we identified a new subset of early ILC progenitors (EILP) that expressed high amounts of TCF-1. EILP lacked efficient T and B lymphocyte potential, but efficiently gave rise to NK cells and all known adult helper-ILC lineages, indicating that they are the earliest identified ILC-committed progenitors. Our results suggest that upregulation of TCF-1 expression denotes the earliest stage of ILC fate specification. The discovery of EILP provides a basis to decipher additional signals that specify the ILC fate.
Collapse
Affiliation(s)
- Qi Yang
- T-Cell Biology and Development Unit, Laboratory of Genome Integrity, Center for Cancer Research, National Cancer Institute, Bethesda, Maryland, USA.,Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Fengyin Li
- Department of Microbiology, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
| | - Christelle Harly
- T-Cell Biology and Development Unit, Laboratory of Genome Integrity, Center for Cancer Research, National Cancer Institute, Bethesda, Maryland, USA
| | - Shaojun Xing
- Department of Microbiology, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
| | - Longyun Ye
- T-Cell Biology and Development Unit, Laboratory of Genome Integrity, Center for Cancer Research, National Cancer Institute, Bethesda, Maryland, USA
| | - Xuefeng Xia
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Haikun Wang
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Xinxin Wang
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Shuyang Yu
- Department of Microbiology, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
| | - Xinyuan Zhou
- Department of Microbiology, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
| | - Maggie Cam
- CCR Collaborative Bioinformatics Resource, National Cancer Institute, Bethesda, Maryland, USA
| | - Hai-Hui Xue
- Department of Microbiology, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
| | - Avinash Bhandoola
- T-Cell Biology and Development Unit, Laboratory of Genome Integrity, Center for Cancer Research, National Cancer Institute, Bethesda, Maryland, USA
| |
Collapse
|
40
|
Gong Z, Xing S, Zheng F, Xing Q. Increased expression of macrophage migration inhibitory factor in aorta of patients with coronary atherosclerosis. J Cardiovasc Surg (Torino) 2015; 56:631-637. [PMID: 24429801] [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: 06/03/2023]
Abstract
AIM The aim of the present study was to investigate the changes of macrophage migration inhibitory factor (MIF) in the aorta of patients with coronary atherosclerosis and to evaluate the relationship between aortic expression levels of MIF and atherosclerotic risk factors. METHODS We collected discarded aortic specimens from patients (N.=36) undergoing coronary artery bypass graft surgery (CABG), and studied the presence and distribution of MIF by immunohistochemistry. The arterial tissues from 10 subjects without known atherosclerosis through the kidney donation program were taken as control group. The preoperative serum triglycerides, total cholesterol, low density lipoprotein cholesterol, high density lipoprotein cholesterol, lipoprotein(a), apolipoprotein A, apolipoprotein B, total bilirubin, direct bilirubin, and indirect bilirubin levels of patients were examined and the coronary angiography was performed in order to assess the severity of atherosclerotic lesions. RESULTS MIF was detectable in aorta from CABG patients. The aortic MIF expression was elevated in smokers, and patients with hypertension or diabetes. In addition, the aortic MIF expression was associated with the levels of triglycerides, total cholesterol, low density lipoprotein cholesterol, lipoprotein (a), apolipoprotein B, total bilirubin, direct bilirubin, indirect bilirubin and coronary severity scores in simple regression analysis. However, the expression of MIF was only correlated to coronary severity scores in multiple regression analysis. CONCLUSION MIF is overexpressed in aorta from patients with coronary atherosclerosis and the aortic MIF expression is correlated with the severity of coronary artery disease.
Collapse
Affiliation(s)
- Z Gong
- Department of Cardiology, Qianfoshan Hospital, Shandong University, Jinan, PR China -
| | | | | | | |
Collapse
|
41
|
Xing S, Wu H, Wang L, Wang J, Ye J. The expression of osteopontin in epithelium of keratocystic odontogenic tumor before and after marsupialization and decompression. Int J Oral Maxillofac Surg 2013. [DOI: 10.1016/j.ijom.2013.07.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
42
|
Fu J, Zhang Z, Zhou L, Qi Z, Xing S, Lv J, Shi J, Fu B, Liu Z, Zhang JY, Jin L, Zhao Y, Lau GKK, Zhao J, Wang FS. Impairment of CD4+ cytotoxic T cells predicts poor survival and high recurrence rates in patients with hepatocellular carcinoma. Hepatology 2013; 58:139-49. [PMID: 22961630 DOI: 10.1002/hep.26054] [Citation(s) in RCA: 127] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2011] [Accepted: 08/24/2012] [Indexed: 01/10/2023]
Abstract
UNLABELLED The role of CD4(+) cytotoxic T cells (CTLs) in hepatocellular carcinoma (HCC) remains obscure. This study characterized CD4(+) CTLs in HCC patients and further elucidated the associations between CD4(+) CTLs and HCC disease progression. In all, 547 HCC patients, 44 chronic hepatitis B (CHB) patients, 86 liver cirrhosis (LC) patients, and 88 healthy individuals were enrolled in the study. CD4(+) CTLs were defined by flow cytometry, immunohistochemistry, and lytic granule exocytosis assays. A multivariate analysis of prognostic factors for overall survival was performed using the Cox proportional hazards model. Circulating and liver-infiltrating CD4(+) CTLs were found to be significantly increased in HCC patients during early stage disease, but decreased in progressive stages of HCC. This loss of CD4(+) CTLs was significantly correlated with high mortality rates and reduced survival time of HCC patients. In addition, the proliferation, degranulation, and production of granzyme A, granzyme B, and perforin of CD4(+) CTLs were inhibited by the increased forkhead/winged helix transcription factor (FoxP3(+) ) regulatory T cells in these HCC patients. Further analysis showed that both circulating and tumor-infiltrating CD4(+) CTLs were independent predictors of disease-free survival and overall survival after the resection of the HCC. CONCLUSION The progressive deficit in CD4(+) CTLs induced by increased FoxP3(+) regulatory T cells was correlated with poor survival and high recurrence rates in HCC patients. These data suggest that CD4(+) CTLs may represent both a potential prognostic marker and a therapeutic target for the treatment of HCC.
Collapse
Affiliation(s)
- Junliang Fu
- Research Center for Biological Therapy, Beijing 302 Hospital, Peking University Health Science Center, Beijing, China
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
43
|
Duan H, Luo Y, Hao H, Feng L, Zhang Y, Lu D, Xing S, Feng J, Yang D, Song L, Yan X. Soluble CD146 in cerebrospinal fluid of active multiple sclerosis. Neuroscience 2013; 235:16-26. [DOI: 10.1016/j.neuroscience.2013.01.020] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2012] [Revised: 12/20/2012] [Accepted: 01/02/2013] [Indexed: 11/28/2022]
|
44
|
Xing S, Jianrui Z. The effect of ischaemic precondition on acute myocardial infraction in patients less than 60 years. Heart 2011. [DOI: 10.1136/heartjnl-2011-300867.411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
45
|
Xing S, Wu Y, Wan L, Tao Z, Jiang H, Yuan Y. Evaluation of oro-mandibular-facial reconstruction using vascularized free fibular osteomyocutaneous flap. Int J Oral Maxillofac Surg 2011. [DOI: 10.1016/j.ijom.2011.07.070] [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: 11/27/2022]
|
46
|
Xing S, Zhen W. e0402 The expression and relation of the vitamin D3 up-regulated protein 1 in peripheral blood mononuclear cells from patients with coronary artery disease. Heart 2010. [DOI: 10.1136/hrt.2010.208967.402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
47
|
Jiao Y, Fu J, Xing S, Fu B, Zhang Z, Shi M, Wang X, Zhang J, Jin L, Kang F, Wu H, Wang FS. The decrease of regulatory T cells correlates with excessive activation and apoptosis of CD8+ T cells in HIV-1-infected typical progressors, but not in long-term non-progressors. Immunology 2008; 128:e366-75. [PMID: 19016904 DOI: 10.1111/j.1365-2567.2008.02978.x] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Persistent HIV infection results in a decrease in absolute counts of CD4(+) CD25(+) regulatory T cells (Treg). To investigate the role of decreased Treg counts in the regulation of excessive activation and apoptosis of CD8(+) T cells in human immunodeficiency virus (HIV)-1 infection, we characterized Treg in 83 HIV-1-infected individuals, including 19 long-term non-progressors (LTNPs) and 51 typical progressors (TPs) who were treatment-naïve, and 13 AIDS patients on highly active antiretroviral therapy (HAART), of whom nine were complete responders (CRs) and the remaining four were non-responders (NRs) to the treatment. TPs but not LTNPs had a significant decrease in absolute counts of circulating Treg, which was inversely correlated with the activation and apoptosis of CD8(+) T cells. Efficient HAART was found to increase Treg counts in CR patients and temper the excessive activation and apoptosis of CD8(+) T cells. Moreover, isolated Treg significantly inhibited the spontaneous and anti-CD3-induced apoptosis of CD8(+) T cells in a dose-dependent manner in vitro. Thus, our findings indicate that the decrease in Treg closely correlates with the increase in apoptotic CD8(+) T cells and disease progression in chronic HIV-1 infection, and that Treg may play a key role in maintaining the balance between the amount and quality of CD8(+) T cells in HIV-1 infection. Manipulation of Treg function may be a promising strategy for immune therapy of this disease.
Collapse
Affiliation(s)
- Yanmei Jiao
- Department of Infectious Diseases, Beijing You-an Hospital Affiliated to Capital Medical University, Beijing, China
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
48
|
Abstract
Glutaredoxins (GRXs) are small, ubiquitous oxidoreductases that have been intensively studied in E. COLI, yeast and humans. They are involved in a large variety of cellular processes and exert a crucial function in the response to oxidative stress. GRXs can reduce disulfides by way of conserved cysteines, located in conserved active site motifs. As in E. COLI, yeast, and humans, GRXs with active sites of the CPYC and CGFS type are also found in lower and higher plants, however, little has been known about their function. Surprisingly, 21 GRXs from ARABIDOPSIS THALIANA contain a novel, plant-specific CC type motif. Lately, information on the function of CC type GRXs and redox regulation, in general, is accumulating. This review focuses on recent findings indicating that GRXs, glutathione and redox regulation, in general, seem to be involved in different processes of development, so far, namely in the formation of the flower. Recent advances in EST and genome sequencing projects allowed searching for the presence of the three different types of the GRX subclasses in other evolutionary informative plant species. A comparison of the GRX subclass composition from PHYSCOMITRELLA, PINUS, ORYZA, POPULUS, and ARABIDOPSIS is presented. This analysis revealed that only two CC type GRXs exist in the bryophyte PHYSCOMITRELLA and that the CC type GRXs group expanded during the evolution of land plants. The existence of a large CC type subclass in angiosperms supports the assumption that their capability to modify target protein activity posttranslationally has been integrated into crucial plant specific processes involved in higher plant development.
Collapse
Affiliation(s)
- S Xing
- Max Planck Institute for Plant Breeding Research, Carl-von-Linné-Weg 10, 50829 Köln, Germany
| | | | | |
Collapse
|
49
|
Abstract
The Research Institute for Diagnosis and Treatment of Early Lung Cancer (RIDTELC) Lung Study was initiated to determine whether lung cancer screening by automated sputum cytometry combined with conventional sputum cytology and auto-fluorescence in addition to white light bronchoscopy could enhance the detection rate of early lung cancer. The present study analyses the initial findings to evaluate the efficiency of automated sputum cytology in predicting the diagnosis of lung cancer. In this study, malignancy grade was used as a predictive parameter for lung cancer. In total, 2,480 heavy smokers (>30 pack-yrs), aged 50-74 yrs, with no previous cancer in the last 5 yrs, received chest radiology, conventional sputum cytology and sputum cytometry screening. In total, twenty-seven lung cancers were diagnosed, representing a prevalence of 1.1%, 25 of which provided sputum samples. Positive automated sputum cytology results were seen in 176 smokers (7.2%), 10 (0.4%) of whom had severe dysplasia or higher lesions (positive results) by conventional sputum cytology examination. Out of 25 tumour cases, 20 had suspicious results using automated sputum cytology, representing 80% sensitivity. One patient out of 24 with tumours had positive results on conventional sputum cytology, representing a sensitivity of 4.2%. For all stages of squamous cell lung cancer and later stage adenocarcinoma the sensitivity of automated sputum cytology was 100%. For adenocarcinoma stage I sensitivity was 25%. In conclusion, DNA analysis of sputum slides by automated sputum cytology may be a suitable tool for the detection of early lung cancer and the characterisation of a high-risk group with pre-invasive lesions for follow-up.
Collapse
Affiliation(s)
- S Xing
- Research Institute for Diagnosis and Treatment of Early Lung Cancer, Augusta Teaching Hospital, Bergstr. 26, D-44971 Bochum, Germany
| | | | | | | | | | | |
Collapse
|
50
|
Abstract
Controversy remains regarding the ability of silicone materials to induce a specific immune reaction versus a nonspecific inflammatory response. Histopathological analysis of the tissue around failed breast implants reveals chronic inflammation with silicone gel droplets either surrounded by giant cells or engulfed by macrophages, areas of fibrosis, and necrosis. Macrophages are the key cells engulfing or forming foreign body giant cells. To address the mechanisms of silicone-induced inflammation a model of human monocyte-derived macrophages (MDMs) was developed. After sonication of silicone gel, the silicone droplets were embedded in Type I collagen and used to coat glass coverslips; human MDMs were subsequently seeded on the coverslips and maintained in culture for up to 7 days. The advantage of the model was that human macrophages could be studied histologically, and cytochemically as they interacted with well-characterized silicone materials. Initial analysis of the human macrophages shows phagocytosis of the silicone gel within hours of exposure to the material. Analysis for pro-inflammatory cytokines reveals significant transient secretion of IL-1 (p < 0.01) over controls by human macrophages upon exposure to silicone gel at 24 h.
Collapse
Affiliation(s)
- F Tavazzani
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario, Canada
| | | | | | | | | |
Collapse
|