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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.
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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
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Xing S, Guo Z, Lang J, Zhou M, Cao J, He H, Yu L, Zhou Y. N-Acetyl-l-cysteine ameliorates gestational diabetes mellitus by inhibiting oxidative stress. Gynecol Endocrinol 2023; 39:2189969. [PMID: 37040789 DOI: 10.1080/09513590.2023.2189969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/13/2023] Open
Abstract
Objective: Gestational diabetes mellitus (GDM) affects 7% of pregnant women worldwide. How to effectively treat GDM has always been a concern of people.Research methods: In this study, a diabetes model was established by drug-induced mice. Subsequently, the blood glucose levels and serum insulin changes of the mice after N-acetyl-l-cysteine (NAC) treatment were observed. At the same time, the effect of NAC on reproduction of GDM mice was recorded.Results of the study: Mice fed NAC showed significantly improved glucose tolerance and insulin sensitivity compared to Diabetic/Control. Total serum cholesterol, serum triglycerides, and serum low-density lipoprotein were significantly reduced, and atherosclerosis index was much lower than in control mice. In addition, Diabetic/Control mice had lower litter sizes and higher birth weights. NAC treatment significantly restored litter size and reduced birth weight in Diabetic/Control mice. It was found in WB assay that the NAC-fed group significantly increased nuclear Nrf2 and HO-1 expression levels.Conclusion: NAC can improve blood glucose tolerance in GDM mice; NAC effectively relieves the symptoms of hyperlipidemia caused by GDM; NAC enhances the expression of Nrf2/HO-1 in the liver, thereby restoring redox homeostasis. NAC can reduce gestational diabetes-related disease indicators by oral administration, and has a beneficial effect on the offspring of pregnant mice (reduces its diabetes disease indicators).
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Affiliation(s)
- Shushan Xing
- Department of Oncology, Tangshan Central Hospital, Tangshan, China
| | - Zhizhen Guo
- Department of Nephrology, Kailuan General Hospital, Tangshan, China
| | - Jie Lang
- Department of Thoracic Surgery, Tangshan People's Hospital, Tangshan, China
| | - Miao Zhou
- Department of Oncology, Tangshan Central Hospital, Tangshan, China
| | - Jianfang Cao
- Department of Oncology, Tangshan Central Hospital, Tangshan, China
| | - Hongyu He
- Department of Oncology, Tangshan Central Hospital, Tangshan, China
| | - Luyan Yu
- Department of Oncology, Tangshan Central Hospital, Tangshan, China
| | - Yang Zhou
- Department of Thoracic Surgery, Tangshan People's Hospital, Tangshan, China
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3
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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
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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.
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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
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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.
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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
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Lang J, Guo Z, Xing S, Sun J, Qiu B, Shu Y, Wang Z, Liu G. Inhibitory role of puerarin on the A549 lung cancer cell line. Transl Cancer Res 2022; 11:4117-4125. [PMID: 36523310 PMCID: PMC9745364 DOI: 10.21037/tcr-22-2246] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 10/21/2022] [Indexed: 09/26/2023]
Abstract
BACKGROUND Although more and more drugs had been proved to be effective in controlling tumor cells, lung cancer was still the leading cause of cancer-related deaths all over the world. This study aimed to investigate the effect and mechanism of puerarin on the invasion and metastasis of A549 lung cancer cell line. METHODS A medium containing puerarin was prepared according to the gradient concentration, and 10, 20, and 40 µmol/L were selected as the experimental group (low, medium, and high concentration groups, respectively) according to the cytotoxicity experiment. Meanwhile, 0 µmol/L was used as the control group. RESULTS Following administration, metastasis-related indexes were detected by the cell scratch test, cell migration test, gene difference detection, and western blotting. 24 hours after administration, the cell scratch and Transwell showed that the migration ability of A549 cells decreased with the increasing puerarin concentration. The polymerase chain reaction (PCR) and western blotting results demonstrated that the expression of the cell invasion and metastasis-related factor, matrix metallopeptidase 9 (MMP9), was negatively correlated with drug concentration. Further investigation demonstrated that the phosphorylation of extracellular signal-regulated kinase (ERK) was also inhibited. CONCLUSIONS Puerarin can inhibit the expression of invasion and metastasis-related factors by inhibiting the phosphorylation of ERK.
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Affiliation(s)
- Jie Lang
- Department of Thoracic Surgery, Tangshan People’s Hospital, Tangshan, China
| | - Zhizhen Guo
- Department of Nephrology, Kailuan General Hospital, Tangshan, China
| | - Shushan Xing
- Department of Oncology, Tangshan Central Hospital, Tangshan, China
| | - Jian Sun
- Department of Thoracic Surgery, Tangshan People’s Hospital, Tangshan, China
| | - Bin Qiu
- Department of Thoracic Surgery, Tangshan People’s Hospital, Tangshan, China
| | - Yu Shu
- Department of Thoracic Surgery, Tangshan People’s Hospital, Tangshan, China
| | - Zhiqiang Wang
- Department of Thoracic Surgery, Tangshan People’s Hospital, Tangshan, China
| | - Guixiang Liu
- Department of Thoracic Surgery, Tangshan People’s Hospital, Tangshan, China
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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]
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8
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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
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9
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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]
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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.
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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
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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
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12
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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.
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13
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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.
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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
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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.![]()
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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
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15
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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
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16
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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.
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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.
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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
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18
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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.
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Affiliation(s)
- Y Z Gao
- Orthopaedic Department of the People's Hospital of Zhengzhou University (Henan Provincial People's Hospital) , Zhengzhou 450003, China
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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.
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Affiliation(s)
- Y Z Gao
- Department of Orthopedics, Henan Provincial People's Hospital (Zhengzhou University People's Hospital), Zhengzhou 450003, China
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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]
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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.
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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
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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.
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Affiliation(s)
- Z Gong
- Department of Cardiology, Qianfoshan Hospital, Shandong University, Jinan, PR China -
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Gong J, Zhang H, Xing S, Li C, Ma Z, Jia G, Hu W. High expression levels of CXCL12 and CXCR4 predict recurrence of adamanti-nomatous craniopharyngiomas in children. Cancer Biomark 2015; 14:241-51. [PMID: 24934367 DOI: 10.3233/cbm-140397] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Adamantinomatous craniopharyngioma (ACP) is a benign but maldevelopmental tumor with a high recurrence rate. OBJECTIVE Theaim of this study was to investigate the dysregulated biological molecules that play important roles in the recurrence of ACP. METHODS We first performed microarray analysis on tumor samples from two pediatric patients with recurrent ACP and from two pediatric ACP patients without recurrence after a one-year follow-up. The expression of CXCL12 and CXCR4 in 45 specimens of pediatric ACP was further evaluated by immunohistochemistry. These results were correlated with the clinicopathological parameters and survival of the patients. RESULTS Four downregulated genes (APC, ITGA, MCAM, and TIMP4) and 16 upregulated genes (CST7, CTSK, CTSL1, CXCL12, CXCR4, FN1, FXYD5, ITGB3, MMP2, MMP3, MMP7, MMP9, NR4A3, PLAUR, TIMP2, and VEGFA) were found in the recurrent patients. CXCL12 and CXCR4 were highly expressed in 13 patients (28.9%) and 14 patients (31.1%), respectively. High levels of CXCL12 and CXCR4 expression were significantly associated with a poor recurrence-free survival and were the prognostic factors for ACP recurrence in pediatric patients. CONCLUSIONS High levels of CXCL12 and CXCR4 expression were associated with ACP recurrence. The role of CXCL12 and CXCR4 in the development of brain tumors requires further research.
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Affiliation(s)
- Jian Gong
- Department of Pediatric Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China Beijing Neurosurgical Institute, Beijing, China
| | - Haili Zhang
- Department of Oncology, Tangshan People's Hospital, Hebei United University, Hebei, China
| | - Shushan Xing
- Department of Oncology, Tangshan People's Hospital, Hebei United University, Hebei, China
| | - Chunde Li
- Department of Pediatric Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Zhenyu Ma
- Department of Pediatric Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Ge Jia
- Department of Pediatric Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Wanning Hu
- Department of Oncology, Tangshan People's Hospital, Hebei United University, Hebei, China
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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]
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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]
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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]
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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]
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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]
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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.
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Affiliation(s)
- S Xing
- Max Planck Institute for Plant Breeding Research, Carl-von-Linné-Weg 10, 50829 Köln, Germany
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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.
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Affiliation(s)
- S Xing
- Research Institute for Diagnosis and Treatment of Early Lung Cancer, Augusta Teaching Hospital, Bergstr. 26, D-44971 Bochum, Germany
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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.
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Affiliation(s)
- F Tavazzani
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario, Canada
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Xing S, Santerre JP, Labow RS, Boynton EL. The effect of polyethylene particle phagocytosis on the viability of mature human macrophages. J Biomed Mater Res 2002; 61:619-27. [PMID: 12115452 DOI: 10.1002/jbm.10078] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Macrophages are the major cell type observed in the inflammatory membrane retrieved at implant revision surgery. In this study, mature human monocyte-derived macrophages (MDM) were adapted to a previously established in vitro model to examine the influence of high-density polyethylene (HDPE) particulate (4-10 microm) on MDM viability. HDPE particles were suspended in soluble type I collagen, which subsequently was solidified on glass coverslips. Mature human macrophages, derived from differentiating peripheral blood monocytes on polystyrene for 10 days, were incubated in culture media on collagen controls and collagen-particle substrata for 31 days. Histologic analysis demonstrated that MDMs were in contact with the particles at 2 h. The majority of the particles were associated with the cells within 24 h. Based on electron microscopy, those cells associated with the particles appeared to be morphologically activated rather than necrotic or apoptotic. Assessment of cell viability revealed no differences among the groups at 24 h, but at 31 days significantly more viable cells and higher DNA values were found associated with the particle groups versus the collagen controls. The histologic results validate human mature MDMs as a clinically relevant cell type for study of the role of polyethylene particulate in aseptic loosening. The cell viability results indicate that phagocytosis of HDPE is not toxic to MDMs but in fact prolongs MDM survival. The long-lived MDMs may play a role in perpetuating chronic inflammation surrounding implants.
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Affiliation(s)
- S Xing
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, 170 College Street, Toronto, Ontario, Canada M5S 3E3
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Xing S, Santerre JP, Labow RS, Boynton EL. Differential response to chemically altered polyethylene by activated mature human monocyte-derived macrophages. Biomaterials 2002; 23:3595-602. [PMID: 12109684 DOI: 10.1016/s0142-9612(02)00088-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Macrophages and polyethylene (PE) particulate are currently recognized as being the two common denominators in the development of chronic inflammation, periprosthetic osteolysis, and subsequent implant failure. In this study, the effect of PE particulate surface chemistry on mature human monocyte-derived macrophage (MDM) function was investigated. Virgin high-density PE (HDPE: 4-10 microm) and HDPE oxidized by irradiation, thermal and chemical treatment were characterized by FT-IR and suspended in soluble type I collagen, which was subsequently solidified on glass coverslips. Human MDMs, derived from differentiating monocytes on polystyrene for 14 days, were trypsinized and cultured on collagen-particle substrata and collagen controls for 31 days. Analysis of conditioned media collected at 24h incubation showed a significantly higher level of IL-1beta secretion in virgin HDPE over oxidized HDPE or collagen controls, and a significant inhibition of IL-6 secretion in both virgin and oxidized samples. Esterase activity was increased in the medium at a significantly higher level in the virgin HDPE versus controls with the highest activity observed in oxidized HDPE at 31 days. These results illustrate the effect of PE particle surface chemistry (oxidation) on MDM cytokine secretion and esterase activity, and highlight the need to further investigate the potential of PE surface chemistry on modulating MDM function.
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Affiliation(s)
- S Xing
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, Canada
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Xing S, Yuan L, Song R, Xu F. [Analysis on the dermal irritation caused by imported cosmetics]. Wei Sheng Yan Jiu 2001; 30:371-3. [PMID: 12561625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
Dermal irritation tests on 902 kinds of cosmetics were conducted. The acute dermal irritation/corrosion tests for 175 samples showed no irritation in 65.1% of them, and 34.9% of them were considered as slight irritation. The chronic dermal irritation/corrosion tests for another 727 samples showed no irritation for 32.2% of them, and 67.8% of them were considered as slight irritation, most of which are lipsticks, eye shadows, fluid powder foundations and powder foundations.
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Affiliation(s)
- S Xing
- Institute of Environmental Health Monitoring, Chinese Academy of Preventive Medicine, Beijing 100021, China
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Wang Y, Xing S, Dong X. [Effect of hormone replacement therapy on hemorheology in postmenopausal women]. Zhonghua Fu Chan Ke Za Zhi 2001; 36:476-8. [PMID: 11758183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE Our study is to observe the effects of conjugated equine estrogen (CEE) combined with medroxyprogesterone acetate (MPA) on hemorheology in postmenopausal women in order to evaluate mechanism responsible for the increase in the incidence of cardiovascular disease after menopause and also to provide proper instruction and advice of hormone replacement therapy (HRT) for postmenopausal women. METHODS 60 healthy postmenopausal women were assigned to 3 groups randomly, 20 cases in each group. Group A: CEE 0.625 mg/d + MPA 2 mg/d + calcium carbonate co. (Ca-D) 600 mg/d. Group B: CEE 0.3 mg/d + MPA 2 mg/d + Ca-D 600 mg/d. Group C: Ca-D 600 mg/d only served as control. Measurements of hemorheological parameters were performed before and 6 months after treatment. RESULTS After 6 months of HRT, group A: blood viscosity under the shear rate of 94.5 s-1 dropped from (5.23 +/- 0.37) mPa.s to (5.03 +/- 0.43) mPa.s (P < 0.05), plasma viscosity dropped from (1.66 +/- 0.19) mPa.s to (1.58 +/- 0.15) mPa.s (P < 0.05), erythrocyte deformability dropped from (4.76 +/- 0.32) mPa.s to (4.54 +/- 0.34) mPa.s (P < 0.05). Group B: blood viscosity under the shear rate of 94.5 s-1 dropped from (5.10 +/- 0.30) mPa.s to (4.87 +/- 0.30) mPa.s (P < 0.05), erythrocyte deformability dropped from (4.65 +/- 0.34) mPa.s to (4.43 +/- 0.29) mPa.s (P < 0.05). No change was found in the control group. After treatment, the levels of plasma viscosity and fibrinogen in group A were much lower than that in group C (P < 0.05). The whole blood viscosity and plasma viscosity in group B were much lower than that in group C (P < 0.05). Thrombelastogram study demonstrated no change regardless HRT or not (P > 0.05). CONCLUSION Both different dosages of CEE have favor effects on blood viscosity and erythrocyte deformabillity, which could play the role in preventing cardiovascular disease in postmenopausal women.
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Affiliation(s)
- Y Wang
- Department of Obstetrics and Gynecology, China-Japan Friendship Hospital, Beijing 100029, China
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36
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Hou Q, Xing S. [The national symposium on pregnancy induced hypertension]. Zhonghua Fu Chan Ke Za Zhi 2001; 36:199-201. [PMID: 11783359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
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37
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Xing S, Zhao Z, Zhou B, Wu X. [Effect of fly ash-filtered mud mixture on soil properties and radish yield and quality]. Ying Yong Sheng Tai Xue Bao 2001; 12:121-5. [PMID: 11813414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
Based on pot culture experiment, the effect of fly ash-filtered mud mixture on soil biochemical properties, radish yield and its quality, and heavy metal accumulation in both soil and radish was examined. The mixture was made by mixing fly ash and filtered mud in proportion 1:1(w/w) and adding small amount of inorganic fertilizer. Its Cd, Pb, Cr, As and Hg contents were much lower than those requested by state control criteria. After applying this mixture in a definite amount, no significant accumulation of heavy metals was found in both soil and radish, the pollution index of heavy metals was < 1, the quantities of soil bacteria increased notably, and the activities of soil urease, phosphates and cellulosase also raised significantly. The application of the mixture promoted radish growth and its development and metabolism. The reducing sugar and vitamin C in radish also increased markedly. The results indicated that the use of adequate amounts of the mixture did not cause any obvious heavy metal pollution in both soil and radish, but could improve soil fertility, and raise radish yield and its quality remarkably.
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Affiliation(s)
- S Xing
- Department of Land and Environmental Science, Fujian Agricultural University, Fuzhou 350002
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38
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Cho JY, Xing S, Liu X, Buckwalter TL, Hwa L, Sferra TJ, Chiu IM, Jhiang SM. Expression and activity of human Na+/I- symporter in human glioma cells by adenovirus-mediated gene delivery. Gene Ther 2000; 7:740-9. [PMID: 10822300 DOI: 10.1038/sj.gt.3301170] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Radioiodide concentrating activity in the thyroid, mediated by human Na+/I- symporter (hNIS), provides a mechanism for effective radioiodide treatment for patients who have invasive, recurrent, and metastatic thyroid cancers after total thyroidectomy. In an attempt to develop hNIS gene transfer for radioiodide therapy for patients with brain tumors, we have constructed recombinant adenoviruses, rAd-CMV-hNIS9 and rAd-CMV-FLhNIS, to express exogenous hNIS in U1240 and U1240Tag human glioma cells. U1240Tag differs from U1240 glioma cells in that it expresses the SV40 large T antigen oncoprotein. In both U1240 and U1240Tag cells, radioiodide uptake (RAIU) activity in the cells infected with rAd-CMV-hNIS9 or rAd-CMV-FLhNIS increases as the adenoviral MOI increases. The protein expression profile of hNIS in infected cells is generally in agreement with their RAIU activity profile. Although the expressed hNIS9 protein appeared to have a shorter half-life than FLhNIS, hNIS9 expression could be maintained by multiple infections in these cells. In addition, we show that hNIS can be expressed and function in a xenografted human glioma by intratumoral injection of rAd-CMV-hNIS9.
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Affiliation(s)
- J Y Cho
- Department of Physiology and Cell Biology, College of Medicine, The Ohio State University, Columbus, OH 43210-1218, USA
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39
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Wang K, Xing S. [Low vacuum as a ground simulation method for studies of gas convection heat transfer inside manned spacecraft]. Space Med Med Eng (Beijing) 1998; 11:415-9. [PMID: 11543378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
Owing to reduced gravity on the orbit, the convection model of the environment inside the manned spacecraft becomes complicated, and it is difficult to simulate under 1G condition for related studies on the ground. The author described a method using low vacuum to simulate the effect of reduced gravity on gas convection heat transfer for ground studies of environmental control and lifesupport system of manned spacecraft. It is demonstrated that when suitable experimental vessel and appropriate method are used, it is possible that convection heat transfer of the environment inside the manned spacecraft flying on the orbit may be simulated successfully on the ground.
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Affiliation(s)
- K Wang
- Institute of Space Medico-Engineering, Beijing, China
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40
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Ji L, Yang R, Yang D, Chen Z, Xing S, Tian M, Sun Y. Prednisone and low-dose activated prothrombin complex concentrates for FVIII inhibitor in nonhaemophilic patients. Haemophilia 1998; 4:721-4. [PMID: 9873877 DOI: 10.1046/j.1365-2516.1998.00184.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Eight nonhaemophilic patients with factor VIII (FVIII) inhibitors were reported. There was no difference in sex distribution. Median age at diagnosis was 62 years (ranging from 14 to 73 years). No associated disorders were revealed and all the patients were presented with severe muscular or arthral bleeding. Inhibitor titre was measured by the Bethesda method, which were 6.4, 126.0, 155.0, 4.8, 56.0, 13.5, 35.0 and 150.0 BU mL-1, respectively, at diagnosis. FVIII:C levels were less than 1 U dL-1 in seven patients and less than 2 U dL-1 in one patient. The median vWF:Ag level was 210% (ranging from 80% to 340%). All the patients had good response to activated prothrombin complex concentrates for acute bleeding episodes and prednisone for inhibitor elimination. Inhibitors completely eliminated in seven patients within a follow-up duration over 1 year, and one patient died of intracranial haemorrhage when her inhibitor titre decreased to 4.5 BU mL-1 and FVIII:C increased to 21 U dL-1.
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Affiliation(s)
- L Ji
- Blood Diseases Hospital, CAMS & PUMC, Tianjin, P. R. China
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41
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Abstract
Gene alterations in the ret proto-oncogene, which encodes a receptor tyrosine kinase, have been found to associate with several human diseases. In this study, we showed that induction of the vgf promoter activity is a good molecular indicator for RET activation in PC12 cells, a rat pheochromocytoma cell line. We demonstrated that all forms of RET oncoprotein, including RET chimeric oncoproteins found in human papillary thyroid carcinomas (RET/PTC) as well as RET oncoproteins found in patients with multiple endocrine neoplasia type 2A and 2B (2A/RET and 2B/RET) can induce vgf promoter activity in PC12 cells. In contrast, a RET mutant found in a patient with Hirschsprung's disease, as well as a RET/PTC1 mutant with deletion of the dimerization domain, failed to induce vgf promoter activity in PC12 cells. We further determined that the signaling events mediated by phosphorylated Tyr294 and phosphorylated Tyr451 binding sites are essential for RET/PTC1 to induce vgf promoter activity in PC12 cells. We also showed that RET/PTC1, 2A/RET, and 2B/RET induce ELK-, cAMP-responsive element binding protein (CREB), or JUN-mediated gene expression in PC12 cells, and these three signaling events are mediated by phosphorylated Tyr294 and phosphorylated Tyr451 binding sites in RET/PTC1.
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Affiliation(s)
- S Xing
- Department of Physiology, The Ohio State University, Columbus, Ohio 43210, USA
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42
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Wang Y, Xing S, Yano Y, Nomura T. [Saponins in Bupleurum smithii Wolff var. parvifolium Shan et Y. Li]. Zhongguo Zhong Yao Za Zhi 1998; 23:96-8, 128. [PMID: 11596268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
Five saikosaponins and two saikosapogenins were isolated from the roots of Bupleurum smithii var. parvifolium by column chromatography, preparative-TLC and HPLC, and identified as saikosaponin a, saikosaponin d, saikosaponin b2, saikosaponin b4, chikusaikoside I, saikogenin F and saikogenin G on the basis of spectral analysis. All of them were isolated from this plant for the first time.
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Affiliation(s)
- Y Wang
- Ningxia Institute for Drug Control, Yinchuan 750004
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43
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Abstract
The PTC1 chimeric oncogene is generated by the fusion of the tyrosine kinase domain of the RET proto-oncogene to the 5'-terminal region of another gene named H4 (D10S170). This oncogene has been detected only in human papillary thyroid carcinomas. We have previously demonstrated that the putative leucine zipper in the N-terminal region of H4 can mediate oligomerization of the PTC1 oncoprotein in vitro. In this study, we further demonstrated that the PTC1 oncoprotein forms a dimer in vivo, and the leucine zipper is responsible for this dimerization. The H4 leucine zipper-mediated dimerization is essential for tyrosine hyperphosphorylation and the transforming activity of the PTC1 oncoprotein. Introducing a loss-of-function PTC1 mutant into PTC1-transformed NIH3T3 cells suppressed the transforming activity of PTC1 and reversed the transformed phenotype of these cells, presumably by forming inactive heterodimers between the two forms of PTC1. Taken together, these data indicate that constitutive dimerization of the PTC1 oncoprotein is essential for PTC1 transforming activity and suggest that constitutive oligomerization acquired by rearrangement or by point mutations may be a general mechanism for the activation of receptor tyrosine kinase oncogenes.
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Affiliation(s)
- Q Tong
- Department of Physiology and the Department of Internal Medicine, Ohio State University, Columbus, Ohio 43210, USA
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44
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Abstract
The iodide concentrating activity of the thyroid gland is essential to the production of thyroid hormone and also provides a mechanism for the treatment of thyroid cancer by radioiodine ablation. We report here the nucleotide and amino acid sequence of the human sodium iodide symporter (hNIS), which mediates the iodide uptake activity in the thyroid gland. An open reading frame of 1929 nucleotides encodes a protein of 643 amino acids with 84% identity to the rat NIS (rNIS). Transient expression of the hNIS cDNA conferred perchlorate-sensitive iodide uptake to a nonthyroid cell line, COS-7. The expression of hNIS was detected at variable levels in papillary thyroid carcinoma tissues but not in any of the thyroid carcinoma cell lines that have lost the iodide uptake activity.
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Affiliation(s)
- P A Smanik
- Department of Physiology, Ohio State University, Columbus 43210, USA
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45
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Xing S, Shi Y, Zhang Y. [Summary of the Sixth National Conference on Obstetrics and Gynecology]. Zhonghua Fu Chan Ke Za Zhi 1996; 31:265-70. [PMID: 9206177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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46
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Abstract
Germline mutations of c-ret, encoding a receptor-type tyrosine kinase, were found to be associated with variants of multiple endocrine neoplasia type 2 (MEN2A, MEN2B), and familial medullary thyroid carcinoma. NIH/3T3 stable transfectants expressing RET with a mutation of MEN2A (MEN2A/RET) or MEN2B (MEN2B/RET) gained a transformed morphology, formed colonies in soft agar, and formed tumors in nude mice. These results confirmed that both MEN2A/RET and MEN2B/RET exert dominant transforming activities in NIH/3T3 cells. However, in contrast to their clinical manifestation, transfectants expressing MEN2A/RET exhibited a higher tumorigenicity in nude mice than transfectants expressing MEN2B/RET may depend on the presence of its ligand and/or substrates that are absent in NIH/3T3 cells. No change in the cellular localization of the mutated RET proteins was observed compared to c-RET. Interestingly, ret activation in NIT/3T3 cells appeared to be associated with up-regulation of homologous gap-junctional intercellular communication and increased expression of a gap-junctional protein, connexin43.
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Affiliation(s)
- S Xing
- Department of Physiology and Internal Medicine, Ohio State University, Columbus 43210, USA
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47
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Xing S, Gai M, Xiang X. [Summary of National Symposium on Improving Quality of Obstetric Care for Safe Motherhood]. Zhonghua Fu Chan Ke Za Zhi 1996; 31:134-71. [PMID: 8758783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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48
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Liu C, Teng Q, Xing S. [Study on the level of soluble interleukin-2 receptor, expression of membrane interleukin-2 receptor and T lymphocyte subpopulations in pulmonary tuberculosis]. Zhonghua Jie He He Hu Xi Za Zhi 1996; 19:44-6. [PMID: 9275389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
OBJECTIVE To evaluate the significance of soluble interleukin-2 receptor (sIL-2R), membrane interleukin-2 receptor (mIL-2R) and T lymphocyte subpopulations in development of pulmonary tuberculosis. METHODS The level of sIL-2R, expression of mIL-2R and the profile of T lymphocyte subpopulations in patients with pulmonary tuberculosis were tested by sandwiched ELISA and alkaline phosphatase-antialkaline phosphate (APAAP) methods. RESULTS The levels of sIL-2R, CD8 were higher, and expression of mIL-2R, CD4, CD4/CD8 ratio were lower in pulmonary tuberculosis than those in normal controls (P < 0.001). And the changes of all indicators in patients with cavitation were more obvious than those in patients without (P < 0.001), the changes in progressive stage were more obvious than those in stable and improving stages (P < 0.001). CONCLUSION The results indicated that the patients, condition and prognosis of pulmonary tuberculosis were related to the changes of sIL-2R level, mIL-2R expression and T lymphocyte subpopulations.
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Affiliation(s)
- C Liu
- Department of Diagnostics, Qingdan Medical College
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49
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Jhiang SM, Sagartz JE, Tong Q, Parker-Thornburg J, Capen CC, Cho JY, Xing S, Ledent C. Targeted expression of the ret/PTC1 oncogene induces papillary thyroid carcinomas. Endocrinology 1996; 137:375-8. [PMID: 8536638 DOI: 10.1210/endo.137.1.8536638] [Citation(s) in RCA: 151] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The ret/PTC oncogene, a rearranged form of the ret proto-oncogene, has been found to be restricted to human papillary thyroid carcinomas. This report shows that transgenic mice with thyroid-targeted expression of the ret/PTC1 oncogene developed thyroid carcinomas with considerable similarities to human papillary thyroid carcinomas, particularly in the nuclear cytologic features and the presence of local invasion. Our findings indicate that ret/PTC2 is not only a biomarker associated with papillary thyroid carcinomas, but is also the only proven specific genetic event leading to the development of papillary thyroid carcinoma.
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Affiliation(s)
- S M Jhiang
- Department of Physiology and Internal Medicine, Ohio State University, Columbus 43210, USA
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50
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Abstract
The aim of the review is to summarize our recent studies on the influence of the thymus on liver functions and its intermediary pathway in rats. Young adult thymectomized rats were used as a model in the experiments, and either thymic peptides or sex hormones were supplemented to these animals. Liver microsomal cytochrome P-450 and aminopyrine-N-demethylase (ADM) activities were decreased in thymectomized rats, and the change in the male was more significant than that in female rats. An increase of liver malondialdehyde (MDA) and a decrease of liver glutathione (GSH) and superoxide dismutase activity were observed in the female thymectomized rats, but not in the males. Accompanied by the increase of MDA, a decline of membrane fluidity of liver microsomes and mitochondria and a decrease of Ca2+ uptake by liver microsomes were exhibited in the female thymectomized rats. Subcutaneous injection of thymic peptides decreased MDA level, and increased GSH content, membrane fluidity and Ca2+ uptake by microsomes in the liver of thymectomized rats. On the other hand, male thymectomized rats showed a decrease of hypothalamic luteinizing hormone-releasing hormone (LHRH), plasma luteinizing hormone (LH) and testosterone levels. Subcutaneous injection of testosterone propionate to these animals restored their liver P-450 and ADM activities to normal levels. Female thymectomized rats exhibited a decline of hypothalamic LHRH and plasma estradiol levels. Supplementation of estradiol benzoate reversed the increase of liver MDA in these animals. The data suggest that the thymus may influence liver functions through the hypothalamus-pituitary-gonad axis. Thus, a new "thymus-neuroendocrine-liver pathway' is proposed, which may account for the significance of the thymus in maintaining homeostasis and integrative functions in the body.
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Affiliation(s)
- L Li
- Department of Pharmacology, Beijing Geriatric Clinical and Research Center, P.R. China
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