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Youreva V, Srivastava AK. Early Growth Response Protein-1 Expression by Insulin-Like Growth Factor-1 Requires ROS-Dependent Activation of ERK1/2 and PKB Pathways in Vascular Smooth Muscle Cells: E ARLY G ROWTH R ESPONSE P ROTEIN -1 B Y IGF-1. J Cell Biochem 2016; 117:152-62. [DOI: 10.1002/jcb.25260] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Accepted: 06/12/2015] [Indexed: 01/03/2023]
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Fang CF, Ma MJ, Zhan BD, Lai SM, Hu Y, Yang XX, Li J, Cao GP, Zhou JJ, Zhang JM, Wang SQ, Hu XL, Li YJ, Wang XX, Cheng W, Yao HW, Li XL, Yi HM, Xu WD, Jiang JF, Gray GC, Fang LQ, Chen EF, Cao WC. Nosocomial transmission of avian influenza A (H7N9) virus in China: epidemiological investigation. BMJ 2015; 351:h5765. [PMID: 26586515 PMCID: PMC4652199 DOI: 10.1136/bmj.h5765] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
STUDY QUESTION Can avian influenza A (H7N9) virus be transmitted between unrelated individuals in a hospital setting? METHODS An epidemiological investigation looked at two patients who shared a hospital ward in February 2015, in Quzhou, Zhejiang Province, China. Samples from the patients, close contacts, and local environments were examined by real time reverse transcriptase (rRT) polymerase chain reaction (PCR) and viral culture. Haemagglutination inhibition and microneutralisation assays were used to detect specific antibodies to the viruses. Primary outcomes were clinical data, infection source tracing, phylogenetic tree analysis, and serological results. STUDY ANSWER AND LIMITATIONS A 49 year old man (index patient) became ill seven days after visiting a live poultry market. A 57 year old man (second patient), with a history of chronic obstructive pulmonary disease, developed influenza-like symptoms after sharing the same hospital ward as the index patient for five days. The second patient had not visited any poultry markets nor had any contact with poultry or birds within 15 days before the onset of illness. H7N9 virus was identified in the two patients, who both later died. Genome sequences of the virus isolated from both patients were nearly identical, and genetically similar to the virus isolated from the live poultry market. No specific antibodies were detected among 38 close contacts. Transmission between the patients remains unclear, owing to the lack of samples collected from their shared hospital ward. Although several environmental swabs were positive for H7N9 by rRT-PCR, no virus was cultured. Owing to delayed diagnosis and frequent hospital transfers, no serum samples were collected from the patients, and antibodies to H7N9 viruses could not be tested. WHAT THIS STUDY ADDS Nosocomial H7N9 transmission might be possible between two unrelated individuals. Surveillance on patients with influenza-like illness in hospitals as well as chickens in live poultry markets should be enhanced to monitor transmissibility and pathogenicity of the virus. FUNDING, COMPETING INTERESTS, DATA SHARING Funding support from the Program of International Science and Technology Cooperation of China (2013DFA30800), Basic Work on Special Program for Science and Technology Research (2013FY114600), National Natural Science Foundation of China (81402730), Special Program for Prevention and Control of Infectious Diseases in China (2013ZX10004218), US National Institutes of Health (1R01-AI108993), Zhejiang Province Major Science and Technology Program (2014C03039), and Quzhou Science and Technology Program (20111084). The authors declare no other interests and have no additional data.
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Affiliation(s)
- Chun-Fu Fang
- Quzhou Center for Disease Control and Prevention, Quzhou, China
| | - Mai-Juan Ma
- State Key Laboratory of Pathogen and Security, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - Bing-Dong Zhan
- Quzhou Center for Disease Control and Prevention, Quzhou, China
| | - Shi-Ming Lai
- Quzhou Center for Disease Control and Prevention, Quzhou, China
| | - Yi Hu
- State Key Laboratory of Pathogen and Security, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - Xiao-Xian Yang
- State Key Laboratory of Pathogen and Security, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - Jing Li
- State Key Laboratory of Pathogen and Security, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - Guo-Ping Cao
- Quzhou Center for Disease Control and Prevention, Quzhou, China
| | - Jing-Jing Zhou
- State Key Laboratory of Pathogen and Security, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - Jian-Min Zhang
- Quzhou Center for Disease Control and Prevention, Quzhou, China
| | | | - Xiao-Long Hu
- Quzhou Center for Disease Control and Prevention, Quzhou, China
| | - Yin-Jun Li
- State Key Laboratory of Pathogen and Security, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - Xiao-Xiao Wang
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - Wei Cheng
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - Hong-Wu Yao
- State Key Laboratory of Pathogen and Security, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - Xin-Lou Li
- State Key Laboratory of Pathogen and Security, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - Huai-Ming Yi
- Changshan County Center for Disease Control and Prevention, Changshan, China
| | | | - Jia-Fu Jiang
- State Key Laboratory of Pathogen and Security, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - Gregory C Gray
- Division of Infectious Diseases, Global Health Institute, & Nicholas School of the Environment, Duke University, Duke University Medical Center, Durham, NC, USA
| | - Li-Qun Fang
- State Key Laboratory of Pathogen and Security, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - En-Fu Chen
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - Wu-Chun Cao
- State Key Laboratory of Pathogen and Security, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
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72853
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Hu W, Huang Y. Targeting the platelet-derived growth factor signalling in cardiovascular disease. Clin Exp Pharmacol Physiol 2015; 42:1221-4. [DOI: 10.1111/1440-1681.12478] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Revised: 08/03/2015] [Accepted: 08/08/2015] [Indexed: 01/08/2023]
Affiliation(s)
- Weining Hu
- Shenzhen Research Institute; Institute of Vascular Medicine and Li Ka Shing Institute of Health Sciences; Chinese University of Hong Kong; Hong Kong China
| | - Yu Huang
- Shenzhen Research Institute; Institute of Vascular Medicine and Li Ka Shing Institute of Health Sciences; Chinese University of Hong Kong; Hong Kong China
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More AS, Mishra JS, Gopalakrishnan K, Blesson CS, Hankins GD, Sathishkumar K. Prenatal Testosterone Exposure Leads to Gonadal Hormone-Dependent Hyperinsulinemia and Gonadal Hormone-Independent Glucose Intolerance in Adult Male Rat Offspring. Biol Reprod 2015; 94:5. [PMID: 26586841 PMCID: PMC4809560 DOI: 10.1095/biolreprod.115.133157] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [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: 07/02/2015] [Accepted: 11/06/2015] [Indexed: 12/14/2022] Open
Abstract
Elevated testosterone levels during prenatal life lead to hyperandrogenism and insulin resistance in adult females. This study evaluated whether prenatal testosterone exposure leads to the development of insulin resistance in adult male rats in order to assess the influence of gonadal hormones on glucose homeostasis in these animals. Male offspring of pregnant rats treated with testosterone propionate or its vehicle (control) were examined. A subset of male offspring was orchiectomized at 7 wk of age and reared to adulthood. At 24 wk of age, fat weights, plasma testosterone, glucose homeostasis, pancreas morphology, and gastrocnemius insulin receptor (IR) beta levels were examined. The pups born to testosterone-treated mothers were smaller at birth and remained smaller through adult life, with levels of fat deposition relatively similar to those in controls. Testosterone exposure during prenatal life induced hyperinsulinemia paralleled by an increased HOMA-IR index in a fasting state and glucose intolerance and exaggerated insulin responses following a glucose tolerance test. Prenatal androgen-exposed males had more circulating testosterone during adult life. Gonadectomy prevented hyperandrogenism, reversed hyperinsulinemia, and attenuated glucose-induced insulin responses but did not alter glucose intolerance in these rats. Prenatal androgen-exposed males had decreased pancreatic islet numbers, size, and beta-cell area along with decreased expression of IR in gastrocnemius muscles. Gonadectomy restored pancreatic islet numbers, size, and beta-cell area but did not normalize IRbeta expression. This study shows that prenatal testosterone exposure leads to a defective pancreas and skeletal muscle function in male offspring. Hyperinsulinemia during adult life is gonad-dependent, but glucose intolerance appears to be independent of postnatal testosterone levels.
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Affiliation(s)
- Amar S More
- Division of Reproductive Endocrinology, Department of Obstetrics & Gynecology, University of Texas Medical Branch, Galveston, Texas
| | - Jay S Mishra
- Division of Reproductive Endocrinology, Department of Obstetrics & Gynecology, University of Texas Medical Branch, Galveston, Texas
| | - Kathirvel Gopalakrishnan
- Division of Reproductive Endocrinology, Department of Obstetrics & Gynecology, University of Texas Medical Branch, Galveston, Texas
| | - Chellakkan S Blesson
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, Texas
| | - Gary D Hankins
- Division of Reproductive Endocrinology, Department of Obstetrics & Gynecology, University of Texas Medical Branch, Galveston, Texas
| | - Kunju Sathishkumar
- Division of Reproductive Endocrinology, Department of Obstetrics & Gynecology, University of Texas Medical Branch, Galveston, Texas
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Nguyen C, Palazzo C, Grabar S, Feydy A, Sanchez K, Zee N, Quinquis L, Ben Boutieb M, Revel M, Lefèvre-Colau MM, Poiraudeau S, Rannou F. Tumor necrosis factor-α blockade in recurrent and disabling chronic sciatica associated with post-operative peridural lumbar fibrosis: results of a double-blind, placebo randomized controlled study. Arthritis Res Ther 2015; 17:330. [PMID: 26596627 PMCID: PMC4655494 DOI: 10.1186/s13075-015-0838-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Accepted: 10/27/2015] [Indexed: 01/23/2023] Open
Abstract
INTRODUCTION The aim of this study was to assess the efficacy and safety of tumor necrosis factor (TNF)-α inhibition with infliximab (IFX) in treating recurrent and disabling chronic sciatica pain associated with post-operative peridural lumbar fibrosis. METHOD A double-blind, placebo-controlled study randomized 35 patients presenting with sciatica pain associated with post-operative peridural lumbar fibrosis to two groups: IFX (n = 18), a single intravenous injection of 3 mg/kg IFX; and placebo (n = 17), a single saline serum injection. The primary outcome was a 50 % reduction in sciatica pain on a visual analog scale (VAS) at day 10. Secondary outcomes were radicular and lumbar VAS pain at day 0 and radicular and lumbar VAS pain, Québec disability score, drug-sparing effect and tolerance at days 10, 30, 90, and 180. RESULTS At day 10, the placebo and IFX groups did not differ in the primary outcome (50 % reduction in sciatica pain observed in three (17.6 %) versus five (27.8 %) patients; p = 0.69). The number of patients reaching the patient acceptable symptom state for radicular pain was significantly higher in the placebo than IFX group after injection (12 (70.6 %) versus five (27.8 %) patients; p = 0.01). The two groups were comparable for all other secondary outcomes. CONCLUSION Treatment with a single 3 mg/kg IFX injection for post-operative peridural lumbar fibrosis-associated sciatica pain does not significantly reduce radicular symptoms at day 10 after injection. TRIAL REGISTRATION ClinicalTrials.gov NCT00385086 ; registered 4 October 2006 (last updated 15 October 2015).
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Affiliation(s)
- Christelle Nguyen
- Univ. Paris Descartes, PRES Sorbonne Paris Cité, Service de Rééducation et Réadaptation de l'Appareil Locomoteur et des Pathologies du Rachis, Hôpital Cochin, Assistance Publique - Hôpitaux de Paris, Paris, France.
- Univ. Paris Descartes, PRES Sorbonne Paris, Cité Laboratoire de Pharmacologie, Toxicologie et Signalisation Cellulaire, INSERM UMR-S 1124, UFR Biomédicale des Saints Pères, Paris, France.
| | - Clémence Palazzo
- Univ. Paris Descartes, PRES Sorbonne Paris Cité, Service de Rééducation et Réadaptation de l'Appareil Locomoteur et des Pathologies du Rachis, Hôpital Cochin, Assistance Publique - Hôpitaux de Paris, Paris, France.
- Univ. Paris Descartes, PRES Sorbonne Paris, INSERM UMR-S 1153 et Institut Fédératif de Recherche sur le Handicap, Paris, France.
| | - Sophie Grabar
- Univ. Paris Descartes, PRES Sorbonne Paris, Biostatistics and Epidemiology Unit, Hôtel Dieu, Assistance Publique-Hôpitaux de Paris, Paris, France.
- INSERM UMR-S 1136, Institut Pierre Louis d'Épidémiologie et de Santé Publique, F-75013, Paris, France.
| | - Antoine Feydy
- Univ. Paris Descartes, PRES Sorbonne Paris Cité, Service de Radiologie B, Hôpital Cochin, Assistance Publique - Hôpitaux de Paris, Paris, France.
| | - Katherine Sanchez
- Univ. Paris Descartes, PRES Sorbonne Paris Cité, Service de Rééducation et Réadaptation de l'Appareil Locomoteur et des Pathologies du Rachis, Hôpital Cochin, Assistance Publique - Hôpitaux de Paris, Paris, France.
| | - Nathalie Zee
- Univ. Paris Descartes, PRES Sorbonne Paris Cité, Service de Radiologie B, Hôpital Cochin, Assistance Publique - Hôpitaux de Paris, Paris, France.
| | - Laurent Quinquis
- Univ. Paris Descartes, PRES Sorbonne Paris, Biostatistics and Epidemiology Unit, Hôtel Dieu, Assistance Publique-Hôpitaux de Paris, Paris, France.
| | - Myriam Ben Boutieb
- Univ. Paris Descartes, PRES Sorbonne Paris, Biostatistics and Epidemiology Unit, Hôtel Dieu, Assistance Publique-Hôpitaux de Paris, Paris, France.
| | - Michel Revel
- Univ. Paris Descartes, PRES Sorbonne Paris Cité, Service de Rééducation et Réadaptation de l'Appareil Locomoteur et des Pathologies du Rachis, Hôpital Cochin, Assistance Publique - Hôpitaux de Paris, Paris, France.
| | - Marie-Martine Lefèvre-Colau
- Univ. Paris Descartes, PRES Sorbonne Paris Cité, Service de Rééducation et Réadaptation de l'Appareil Locomoteur et des Pathologies du Rachis, Hôpital Cochin, Assistance Publique - Hôpitaux de Paris, Paris, France.
| | - Serge Poiraudeau
- Univ. Paris Descartes, PRES Sorbonne Paris Cité, Service de Rééducation et Réadaptation de l'Appareil Locomoteur et des Pathologies du Rachis, Hôpital Cochin, Assistance Publique - Hôpitaux de Paris, Paris, France.
- Univ. Paris Descartes, PRES Sorbonne Paris, INSERM UMR-S 1153 et Institut Fédératif de Recherche sur le Handicap, Paris, France.
| | - François Rannou
- Univ. Paris Descartes, PRES Sorbonne Paris Cité, Service de Rééducation et Réadaptation de l'Appareil Locomoteur et des Pathologies du Rachis, Hôpital Cochin, Assistance Publique - Hôpitaux de Paris, Paris, France.
- Univ. Paris Descartes, PRES Sorbonne Paris, Cité Laboratoire de Pharmacologie, Toxicologie et Signalisation Cellulaire, INSERM UMR-S 1124, UFR Biomédicale des Saints Pères, Paris, France.
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72856
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Liang L, Deng G, Shi J, Wang S, Zhang Q, Kong H, Gu C, Guan Y, Suzuki Y, Li Y, Jiang Y, Tian G, Liu L, Li C, Chen H. Genetics, Receptor Binding, Replication, and Mammalian Transmission of H4 Avian Influenza Viruses Isolated from Live Poultry Markets in China. J Virol 2016; 90:1455-69. [PMID: 26581996 DOI: 10.1128/JVI.02692-15] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Accepted: 11/12/2015] [Indexed: 12/29/2022] Open
Abstract
H4 avian influenza virus (AIV) is one of the most prevalent influenza virus subtypes in the world. However, whether H4 AIVs pose a threat to public health remains largely unclear. Here, we analyzed the phylogenetic relationships, receptor binding properties, replication, and transmissibility in mammals of H4 AIVs isolated from live poultry markets in China between 2009 and 2012. Genomic sequence analysis of 36 representative H4 viruses revealed 32 different genotypes, indicating that these viruses are undergoing complex and frequent reassortment events. All 32 viruses tested could replicate in the respiratory organs of infected mice without prior adaptation. Receptor binding analysis demonstrated that the H4 AIVs bound to α-2,6-linked glycans, although they retained the binding preference for α-2,3-linked glycans. When we tested the direct-contact transmission of 10 H4 viruses in guinea pigs, we found that three viruses did not transmit to any of the contact animals, one virus transmitted to one of three contact animals, and six viruses transmitted to all three contact animals. When we further tested the respiratory droplet transmissibility of four of the viruses that transmitted efficiently via direct contact, we found that three of them could transmit to one or two of the five exposed animals. Our study demonstrates that the current circulating H4 AIVs can infect, replicate in, and transmit to mammalian hosts, thereby posing a potential threat to human health. These findings emphasize the continual need for enhanced surveillance of H4 AIVs. IMPORTANCE Numerous surveillance studies have documented the wide distribution of H4 AIVs throughout the world, yet the biological properties of H4 viruses have not been well studied. In this study, we found that multiple genotypes of H4 viruses are cocirculating in the live poultry markets of China and that H4 viruses can replicate in mice, possess human-type receptor binding specificity, and transmit between guinea pigs via direct contact. Strikingly, some H4 strains also can transmit via respiratory droplet, albeit with limited efficiency. These results clearly show the potential threat posed by H4 viruses to public health.
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72857
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Wang G, Liu C, Deng S, Zhao Q, Li T, Qiao S, Shen L, Zhang Y, Lü J, Meng L, Liang C, Yu Z. Long noncoding RNAs in regulation of human breast cancer. Brief Funct Genomics 2015; 15:222-6. [PMID: 26582840 DOI: 10.1093/bfgp/elv049] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [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: 01/16/2023] Open
Abstract
Less than 2% of the human genome DNA is composed of protein-coding genes, although the majority of the human genome is transcribed, indicating the transcripts mostly are noncoding RNAs. Those noncoding RNAs with length between 200 nt and 200 kb are categorized as long noncoding RNA (lncRNA). Around 30 000 lncRNAs have been predicted or identified, although little is known regarding the regulatory function for a vast majority of these sequences. Emerging evidence demonstrated that lncRNAs play crucial roles in regulation of many cancer types, including breast cancer, serving as oncogenes or tumor suppressors. Aberrant and differential expression of lncRNA in breast cancer has been frequently reported. Their regulation of breast cancer is still the beginning to be elucidated. This review collected those experimentally validated lncRNAs in human breast cancer, summarizing their biological function as well as the regulatory mechanism. In addition, the potential of lncRNAs as biomarkers for better diagnosis or therapeutic targets for cancer treatment was discussed.
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72858
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Liang B, Zhong L, He Q, Wang S, Pan Z, Wang T, Zhao Y. Diagnostic Accuracy of Serum CA19-9 in Patients with Cholangiocarcinoma: A Systematic Review and Meta-Analysis. Med Sci Monit 2015; 21:3555-63. [PMID: 26576628 PMCID: PMC4655615 DOI: 10.12659/msm.895040] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Cholangiocarcinoma (CCA) is a relatively rare cancer worldwide; however, its incidence is extremely high in Asia. Numerous studies reported that serum carbohydrate antigen 19-9 (CA19-9) plays a role in the diagnosis of CCA patients. However, published data are inconclusive. The aim of this meta-analysis was to provide a systematic review of the diagnostic performance of CA19-9 for CCA. MATERIAL AND METHODS We searched the public databases including PubMed, Web of Science, Embase, Chinese National Knowledge Infrastructure (CNKI), and WANFANG databases for articles evaluating the diagnostic accuracy of serum CA19-9 to predict CCA. The diagnostic sensitivity (SEN), specificity (SPE), positive likelihood ratio (PLR), negative likelihood ratio (NLR), diagnostic odds ratio (DOR), and summary receiver operating characteristic curve (SROC) were pooled by Meta-DiSc 1.4 software. RESULTS A total of 31 articles met the inclusion criteria, including 1,264 patients and 2,039 controls. The pooled SEN, SPE, PLR, NLR, and DOR were 0.72 (95% CI: 0.70-0.75), 0.84 (95% CI: 0.82-0.85), 4.93 (95% CI, 3.67-6.64), 0.35 (95%CI, 0.30-0.41), and 15.10 (95% CI, 10.70-21.32), respectively. The area under SROC curve was 0.8300. The subgroup analyses based on different control type, geographical location, and sample size revealed that the diagnostic accuracy of CA19-9 tends to be same in different control type, but showed low sensitivity in European patients and small size group. CONCLUSIONS Serum CA19-9 is a useful non-invasive biomarker for CCA detection and may become a clinically useful tool to identify high-risk patients.
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Affiliation(s)
- Bin Liang
- Biochip Center, Key Laboratory of Cell Biology, Ministry of Public Health, China Medical University, Shenyang, Liaoning, China (mainland)
| | - Liansheng Zhong
- Biochip Center, Key Laboratory of Cell Biology, Ministry of Public Health, China Medical University, Shenyang, Liaoning, China (mainland)
| | - Qun He
- Biochip Center, Key Laboratory of Cell Biology, Ministry of Public Health, China Medical University, Shenyang, Liaoning, China (mainland)
| | - Shaocheng Wang
- Biochip Center, Key Laboratory of Cell Biology, Ministry of Public Health, China Medical University, Shenyang, Liaoning, China (mainland)
| | - Zhongcheng Pan
- Biochip Center, Key Laboratory of Cell Biology, Ministry of Public Health, China Medical University, Shenyang, Liaoning, China (mainland)
| | - Tianjiao Wang
- Biochip Center, Key Laboratory of Cell Biology, China Medical University, Shenyang, Liaoning, China (mainland)
| | - Yujie Zhao
- Biochip Center, Key Laboratory of Cell Biology, Ministry of Public Health, China Medical University, Shenyang, Liaoning, China (mainland)
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72859
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Ko M, An J, Rao A. DNA methylation and hydroxymethylation in hematologic differentiation and transformation. Curr Opin Cell Biol 2015; 37:91-101. [PMID: 26595486 DOI: 10.1016/j.ceb.2015.10.009] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2015] [Revised: 10/21/2015] [Accepted: 10/26/2015] [Indexed: 01/09/2023]
Abstract
Maintenance of the balance of DNA methylation and demethylation is fundamental for normal cellular development and function. Members of the Ten-Eleven-Translocation (TET) family proteins are Fe(II)-dependent and 2-oxoglutarate-dependent dioxygenases that catalyze sequential oxidation of 5-methylcytosine (5mC) to 5-hydroxymethylcytosine (5hmC) and subsequent oxidized derivatives in DNA. In addition to their roles as intermediates in DNA demethylation, these oxidized methylcytosines are novel epigenetic modifications of DNA. DNA methylation and hydroxymethylation profiles are markedly disrupted in a wide range of cancers but how these changes are related to the pathogenesis of cancers is still ambiguous. In this review, we discuss the current understanding of TET protein functions in normal and malignant hematopoietic development and the ongoing questions to be resolved.
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Affiliation(s)
- Myunggon Ko
- School of Life Sciences, Ulsan National Institute of Science and Technology, UNIST-gil 50, Ulju-gun, Ulsan 689-798, Republic of Korea.
| | - Jungeun An
- Center for Genomic Integrity, Institute for Basic Science (IBS), UNIST-gil 50, Ulju-gun, Ulsan 689-798, Republic of Korea
| | - Anjana Rao
- Division of Signaling and Gene Expression, La Jolla Institute for Allergy & Immunology, La Jolla, CA 92037, USA; Department of Pharmacology and Moores Cancer Center, University of California at San Diego, La Jolla, CA, USA; Sanford Consortium for Regenerative Medicine, La Jolla, CA 92037, USA
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72860
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Zhao K, Chen BJ, Chen ZG, Zhang YJ, Xu D, Liu Q. Effect of miR-503 Down-Regulation on Growth and Invasion of Esophagus Carcinoma and Related Immune Function. Med Sci Monit 2015; 21:3564-9. [PMID: 26580839 PMCID: PMC4655614 DOI: 10.12659/msm.895518] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Background MicroRNA (miR) has been proved to be an important biomarker for tumors because it can regulate occurrence, progression, invasion, and metastasis of cancer. A previous study has shown the involvement of miR-503 in multiple gastrointestinal tumors. Its detailed role and immune regulatory function in esophagus carcinoma, however, remains unknown. This study thus investigated the effect of miR-503 in regulating growth, proliferation, and invasion of esophagus cancer and its influence on cytokine secretion. Material/Methods Esophagus carcinoma cell line EC9706 and normal esophageal epithelial cell line HEEC were transfected with miR-503 inhibitor. MTT assay was used to quantify the cell proliferation, and a Transwell chamber was used to evaluate cell invasion. Release of cytokines, including interleukin-2 (IL-2), IL-4, IL-10, and interferon-γ (IFN-γ), was measured by enzyme-linked immunosorbent assay (ELISA). Results MiR-503 expression was significantly elevated in esophagus carcinoma cells (p<0.05). The specific inhibition of miR-503 expression remarkably suppressed proliferation and invasion of tumor cells. It can also down-regulated IL-2 and IFN-γ expression and facilitate secretion of IL-4 and IL-10 when compared to the control group (p<0.05 in all ceases). Conclusions The inhibition of miR-503 can effectively inhibit tumor progression and improve immune function, suggesting its potency as a novel drug target for esophagus cancer treatment.
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Affiliation(s)
- Ke Zhao
- Department of Thoracic Surgery, The Central Hospital of Wuhan, Wuhan, Hubei, China (mainland)
| | - Bao-Jun Chen
- Department of Thoracic Surgery, The Central Hospital of Wuhan, Wuhan, Hubei, China (mainland)
| | - Zhi-Guo Chen
- Department of Thoracic Surgery, The Central Hospital of Wuhan, Wuhan, Hubei, China (mainland)
| | - Yong-Jian Zhang
- Department of Thoracic Surgery, The Central Hospital of Wuhan, Wuhan, Hubei, China (mainland)
| | - Di Xu
- Department of Thoracic Surgery, The Central Hospital of Wuhan, Wuhan, Hubei, China (mainland)
| | - Qi Liu
- Department of Thoracic Surgery, The Central Hospital of Wuhan, Wuhan, Hubei, China (mainland)
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72861
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Werner C, Pauli M, Doose S, Weishaupt A, Haselmann H, Grünewald B, Sauer M, Heckmann M, Toyka KV, Asan E, Sommer C, Geis C. Human autoantibodies to amphiphysin induce defective presynaptic vesicle dynamics and composition. Brain 2015; 139:365-79. [DOI: 10.1093/brain/awv324] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Accepted: 09/25/2015] [Indexed: 12/16/2022] Open
Abstract
Abstract
See Irani (doi:10.1093/awv364) for a scientific commentary on this article.
Stiff-person syndrome is the prototype of a central nervous system disorder with autoantibodies targeting presynaptic antigens. Patients with paraneoplastic stiff-person syndrome may harbour autoantibodies to the BAR (Bin/Amphiphysin/Rvs) domain protein amphiphysin, which target its SH3 domain. These patients have neurophysiological signs of compromised central inhibition and respond to symptomatic treatment with medication enhancing GABAergic transmission. High frequency neurotransmission as observed in tonic GABAergic interneurons relies on fast exocytosis of neurotransmitters based on compensatory endocytosis. As amphiphysin is involved in clathrin-mediated endocytosis, patient autoantibodies are supposed to interfere with this function, leading to disinhibition by reduction of GABAergic neurotransmission. We here investigated the effects of human anti-amphiphysin autoantibodies on structural components of presynaptic boutons ex vivo and in vitro using electron microscopy and super-resolution direct stochastic optical reconstruction microscopy. Ultrastructural analysis of spinal cord presynaptic boutons was performed after in vivo intrathecal passive transfer of affinity-purified human anti-amphiphysin autoantibodies in rats and revealed signs of markedly disabled clathrin-mediated endocytosis. This was unmasked at high synaptic activity and characterized by a reduction of the presynaptic vesicle pool, clathrin coated intermediates, and endosome-like structures. Super-resolution microscopy of inhibitory GABAergic presynaptic boutons in primary neurons revealed that specific human anti-amphiphysin immunoglobulin G induced an increase of the essential vesicular protein synaptobrevin 2 and a reduction of synaptobrevin 7. This constellation suggests depletion of resting pool vesicles and trapping of releasable pool vesicular proteins at the plasma membrane. Similar effects were found in amphiphysin-deficient neurons from knockout mice. Application of specific patient antibodies did not show additional effects. Blocking alternative pathways of clathrin-independent endocytosis with brefeldin A reversed the autoantibody induced effects on molecular vesicle composition. Endophilin as an interaction partner of amphiphysin showed reduced clustering within presynaptic terminals. Collectively, these results point towards an autoantibody-induced structural disorganization in GABAergic synapses with profound changes in presynaptic vesicle pools, activation of alternative endocytic pathways, and potentially compensatory rearrangement of proteins involved in clathrin-mediated endocytosis. Our findings provide novel insights into synaptic pathomechanisms in a prototypic antibody-mediated central nervous system disease, which may serve as a proof-of-principle example in this evolving group of autoimmune disorders associated with autoantibodies to synaptic antigens.
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Affiliation(s)
- Christian Werner
- 1 Hans-Berger Department of Neurology, Jena University Hospital, Erlanger Allee 101, 07747 Jena, Germany
- 2 Department of Neurology, University of Würzburg, Josef-Schneider Str. 11, 97080 Würzburg, Germany
| | - Martin Pauli
- 3 Department of Neurophysiology, Institute of Physiology, University of Würzburg, Roentgenring 9, 97070 Würzburg, Germany
| | - Sören Doose
- 4 Department of Biotechnology and Biophysics, Biocenter, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Andreas Weishaupt
- 2 Department of Neurology, University of Würzburg, Josef-Schneider Str. 11, 97080 Würzburg, Germany
| | - Holger Haselmann
- 1 Hans-Berger Department of Neurology, Jena University Hospital, Erlanger Allee 101, 07747 Jena, Germany
- 2 Department of Neurology, University of Würzburg, Josef-Schneider Str. 11, 97080 Würzburg, Germany
- 5 Center for Sepsis Control and Care (CSCC), Jena University Hospital, Erlanger Allee 101, 07747 Jena, Germany
| | - Benedikt Grünewald
- 1 Hans-Berger Department of Neurology, Jena University Hospital, Erlanger Allee 101, 07747 Jena, Germany
- 2 Department of Neurology, University of Würzburg, Josef-Schneider Str. 11, 97080 Würzburg, Germany
- 5 Center for Sepsis Control and Care (CSCC), Jena University Hospital, Erlanger Allee 101, 07747 Jena, Germany
| | - Markus Sauer
- 4 Department of Biotechnology and Biophysics, Biocenter, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Manfred Heckmann
- 3 Department of Neurophysiology, Institute of Physiology, University of Würzburg, Roentgenring 9, 97070 Würzburg, Germany
| | - Klaus V. Toyka
- 2 Department of Neurology, University of Würzburg, Josef-Schneider Str. 11, 97080 Würzburg, Germany
| | - Esther Asan
- 6 Institute for Anatomy and Cell Biology, University of Würzburg, Koellikerstrasse 6, 97070 Würzburg, Germany
| | - Claudia Sommer
- 2 Department of Neurology, University of Würzburg, Josef-Schneider Str. 11, 97080 Würzburg, Germany
| | - Christian Geis
- 1 Hans-Berger Department of Neurology, Jena University Hospital, Erlanger Allee 101, 07747 Jena, Germany
- 2 Department of Neurology, University of Würzburg, Josef-Schneider Str. 11, 97080 Würzburg, Germany
- 5 Center for Sepsis Control and Care (CSCC), Jena University Hospital, Erlanger Allee 101, 07747 Jena, Germany
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72862
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Affiliation(s)
- Bing Liu
- Department of Cardiology, Jinan Fourth Hospital, Jinan, Shandong, PR China
| | - Qiao Li
- Institute of Biomedical Engineering, School of Medicine, Shandong University, Jinan, Shandong, PR China
| | - Peng Qiu
- College of Science and Technology, Shandong Traditional Chinese Medicine University, Jinan, Shandong, PR China
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72863
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Akiyama Y, Iwaya T, Shioi Y, Endo F, Chiba T, Otsuka K, Nitta H, Koeda K, Mizuno M, Uesugi N, Kimura Y, Sasaki A. Effectiveness of neoadjuvant chemotherapy with cisplatin and irinotecan followed by surgery on small-cell carcinoma of the esophagus: A case report. Int J Surg Case Rep 2015; 17:121-5. [PMID: 26615446 PMCID: PMC4701824 DOI: 10.1016/j.ijscr.2015.11.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [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: 09/15/2015] [Accepted: 11/10/2015] [Indexed: 12/18/2022] Open
Abstract
Small-cell carcinoma of the esophagus is a rare disease and a poor prognosis. The optimum treatment strategy for SCCE remains to be established. We report a case of advanced SCCE achieving a pathologically complete response with preoperative chemotherapy using CDDP and CPT-11, and long-term survival followed by surgery. Neoadjuvant chemotherapy following esophagectomy could be a useful treatment option.
Introduction Small-cell carcinoma of the esophagus (SCCE) is a rare disease with aggressive progression and a poor prognosis. A standard treatment strategy for SCCE is yet to be established. Presentation of case A 40-year-old woman with dysphagia was admitted to our hospital. A clinical diagnosis of SCCE (T3N1N0 stage IIIA) was established. She was initially treated with chemotherapy using cisplatin (CDDP) and irinotecan (CPT-11). After two courses of treatment, the primary lesion in the esophagus was not detectable by esophageal endoscopy. Likewise, swelling of the right recurrent nerve lymph node present prior to treatment could not be detected. The chemotherapy resulted in a complete response. One month after the conclusion of chemotherapy, radical esophagectomy with three-field lymph node dissection was performed. Histopathological examination of the excised specimen revealed no residual tumor or lymph node metastasis. The patient was discharged from hospital 29 days after surgery with no complications. The patient is alive and has remained cancer-free for 48 months after the surgery. Discussion Systemic chemotherapy for SCCE in combination with surgery was treated after surgery in most reports. Neoadjuvant chemotherapy is advantageous from three viewpoints, namely achievement of downstaging, increasing complete resection rates, and a better completion of treatment compared with postoperative chemotherapy. Neoadjuvant chemotherapy following esophagectomy could be a useful treatment option for patients with limited disease (LD) of SCCE. Conclusion We report a case of SCCE achieving a pathologically complete response with neoadjuvant chemotherapy using CDDP and CPT-11, and long-term survival followed by surgery.
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Affiliation(s)
- Yuji Akiyama
- Department of Surgery, Iwate Medical University School of Medicine, Iwate, Japan.
| | - Takeshi Iwaya
- Department of Surgery, Iwate Medical University School of Medicine, Iwate, Japan
| | - Yoshihiro Shioi
- Department of Surgery, Iwate Medical University School of Medicine, Iwate, Japan
| | - Fumitaka Endo
- Department of Surgery, Iwate Medical University School of Medicine, Iwate, Japan
| | - Takehiro Chiba
- Department of Surgery, Iwate Medical University School of Medicine, Iwate, Japan
| | - Koki Otsuka
- Department of Surgery, Iwate Medical University School of Medicine, Iwate, Japan
| | - Hiroyuki Nitta
- Department of Surgery, Iwate Medical University School of Medicine, Iwate, Japan
| | - Keisuke Koeda
- Department of Surgery, Iwate Medical University School of Medicine, Iwate, Japan
| | - Masaru Mizuno
- Department of Surgery, Iwate Medical University School of Medicine, Iwate, Japan
| | - Noriyuki Uesugi
- Division of Molecular Diagnostic Pathology, Department of Pathology, Iwate Medical University School of Medicine, Iwate, Japan
| | - Yusuke Kimura
- Department of Palliative Care Medicine, Iwate Medical University School of Medicine, Iwate, Japan
| | - Akira Sasaki
- Department of Surgery, Iwate Medical University School of Medicine, Iwate, Japan
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Liu Y, Dong Z, Liang J, Guo Y, Guo X, Shen S, Kuang G, Guo W. Methylation-mediated repression of potential tumor suppressor miR-203a and miR-203b contributes to esophageal squamous cell carcinoma development. Tumour Biol 2016; 37:5621-32. [PMID: 26577858 DOI: 10.1007/s13277-015-4432-9] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Accepted: 11/11/2015] [Indexed: 12/31/2022] Open
Abstract
MiRNAs regulate gene expression and play pivotal roles in biological processes. MiRNAs can be inactivated by epigenetic mechanisms, such as DNA hypermethylation of CpG sites within CpG islands. Here, we investigated the role and methylation status of miR-203a and miR-203b in esophageal cancer cell lines and primary esophageal squamous cell carcinoma (ESCC) tumors and further elucidate the role of both miRNAs in the prognosis of ESCC. The present study revealed a strong downregulation of miR-203a and miR-203b in esophageal cancer cell lines and primary ESCC samples. Treatment of esophageal cancer cells with demethylating agent 5-Aza-dC led to increased miR-203a and miR-203b expression, confirming the epigenetic regulation of both miRNAs. The inhibition of proliferation and invasiveness in esophageal cancer cells after treated with 5-Aza-dC or transfected with miR-203a or miR-203b mimics, suggesting the tumor suppressor role of both miRNAs in esophageal cancer. Furthermore, the critical CpG sites of miR-203a and miR-203b were found to be located in proximal promoter region, and the proximal promoter hypermethylation of both miRNAs was found to influence transcriptional activity. Downregulation and hypermethylation of miR-203a and miR-203b were associated with TNM stage, pathological differentiation, and lymph node metastasis. ESCC patients in stages III and IV, with reduced expression of miR-203a or hypermethylation of miR-203a or miR-203b, demonstrated poor patient survival. In summary, our results suggest that miR-203a and miR-203b may function as tumor-suppressive miRNAs that are inactivated through proximal promoter hypermethylation and miR-203a expression and methylation may be useful prognostic marker in ESCC patients.
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Abstract
Diet-induced obesity leads to devastating and common chronic diseases, fueling ongoing interest in determining new mechanisms underlying both obesity and its consequences. It is now well known that chronic overnutrition produces a unique form of inflammation in peripheral insulin target tissues, and efforts to limit this inflammation have met with some success in preserving insulin sensitivity in obese individuals. Recently, the activation of inflammatory pathways by dietary excess has also been observed among cells located in the mediobasal hypothalamus, a brain area that exerts central control over peripheral glucose, fat, and energy metabolism. Here we review progress in the field of diet-induced hypothalamic inflammation, drawing key distinctions between metabolic inflammation in the hypothalamus and that occurring in peripheral tissues. We focus on specific stimuli of the inflammatory response, the roles of individual hypothalamic cell types, and the links between hypothalamic inflammation and metabolic function under normal and pathophysiological circumstances. Finally, we explore the concept of controlling hypothalamic inflammation to mitigate metabolic disease.
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72866
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Hiono T, Okamatsu M, Yamamoto N, Ogasawara K, Endo M, Kuribayashi S, Shichinohe S, Motohashi Y, Chu DH, Suzuki M, Ichikawa T, Nishi T, Abe Y, Matsuno K, Tanaka K, Tanigawa T, Kida H, Sakoda Y. Experimental infection of highly and low pathogenic avian influenza viruses to chickens, ducks, tree sparrows, jungle crows, and black rats for the evaluation of their roles in virus transmission. Vet Microbiol 2016; 182:108-15. [PMID: 26711036 DOI: 10.1016/j.vetmic.2015.11.009] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Revised: 11/09/2015] [Accepted: 11/12/2015] [Indexed: 11/22/2022]
Abstract
Highly pathogenic avian influenza viruses (HPAIVs) have spread in both poultry and wild birds. Determining transmission routes of these viruses during an outbreak is essential for the control of avian influenza. It has been widely postulated that migratory ducks play crucial roles in the widespread dissemination of HPAIVs in poultry by carrying viruses along with their migrations; however close contacts between wild migratory ducks and poultry are less likely in modern industrial poultry farming settings. Therefore, we conducted experimental infections of HPAIVs and low pathogenic avian influenza viruses (LPAIVs) to chickens, domestic ducks, tree sparrows, jungle crows, and black rats to evaluate their roles in virus transmission. The results showed that chickens, ducks, sparrows, and crows were highly susceptible to HPAIV infection. Significant titers of virus were recovered from the sparrows and crows infected with HPAIVs, which suggests that they potentially play roles of transmission of HPAIVs to poultry. In contrast, the growth of LPAIVs was limited in each of the animals tested compared with that of HPAIVs. The present results indicate that these common synanthropes play some roles in influenza virus transmission from wild birds to poultry.
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72867
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Lee D, Ahn C, An BS, Jeung EB. Induction of the Estrogenic Marker Calbindn-D₉k by Octamethylcyclotetrasiloxane. Int J Environ Res Public Health 2015; 12:14610-25. [PMID: 26593928 PMCID: PMC4661670 DOI: 10.3390/ijerph121114610] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 11/03/2015] [Accepted: 11/11/2015] [Indexed: 11/16/2022]
Abstract
Interrupting the hormonal balance of an organism by interfering with hormones and their target receptors gives rise to various problems such as developmental disorders. Collectively, these reagents are known as endocrine disruptors (EDs). Cyclic volatile methyl siloxanes (cVMSs) are a group of silicone polymers that including octamethylcyclotetrasiloxane (D4). In the present study, we examined the estrogenicity of D4 through in vitro and in vivo assays that employed calcium-binding protein 9K (calbindin-D9k; CaBP-9K) as a biomarker. For in vitro investigation, GH3 rat pituitary cells were exposed to vehicle, 17β-estradiol (E2), or D4 with/without ICI 182 780 (ICI). CaBP-9K and progesterone receptor (PR) both were up-regulated by E2 and D4 which were completely blocked by ICI. Transcription of estrogen receptor α (ER α) was decreased by E2 and D4 but increased by ICI. D4 was also administered to immature female rats for an uterotrophic (UT) assay and detection of CaBP-9K. Ethinyl estradiol (EE) or D4 was administered subcutaneously with or without ICI. Although uterine weight was not significant altered by D4, an effect thought to be due to cytochrome P450 (CYP), it induced CaBP-9K and PR gene expression. Based on these results we reveal that D4 has estrogenic potential proven under in vitro and in vivo experimental conditions.
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Affiliation(s)
- Dongoh Lee
- Laboratory of Veterinary Biochemistry and Molecular Biology, College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk 362-763, Korea.
| | - Changhwan Ahn
- Laboratory of Veterinary Biochemistry and Molecular Biology, College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk 362-763, Korea.
| | - Beum-Soo An
- Department of Biomaterials Science, College of National Resources & Life Science, Pusan National University, Miryang, Gyeongsangnam-do 627-706, Korea.
| | - Eui-Bae Jeung
- Laboratory of Veterinary Biochemistry and Molecular Biology, College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk 362-763, Korea.
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Stankovic MS, Turuntas V, De Luka SR, Jankovic S, Stefanovic S, Puskas N, Zaletel I, Milutinović-Smiljanic S, Trbovich AM. Effects of Il-33/St2 pathway on alteration of iron and hematological parameters in acute inflammation. Exp Mol Pathol 2015; 99:687-92. [PMID: 26569073 DOI: 10.1016/j.yexmp.2015.11.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Revised: 10/03/2015] [Accepted: 11/09/2015] [Indexed: 01/02/2023]
Abstract
AIM The aim of this study was to examine the role of the IL-33/ST2 pathway in pathogenesis of acute inflammation by investigating its possible role in alteration of iron and hematological parameters in experimental model of acute inflammation. MATERIAL AND METHODS Wild-type and ST2 knockout BALB/c mice were divided into four groups: wild-type control group, ST2-/- control group, wild-type inflammatory group, and ST2-/- inflammatory group. Acute inflammation was induced by intramuscular injection of turpentine oil, while control groups were injected with saline. After 12h animals were anesthetized, and the treated tissue, blood and spleen were collected. Iron concentration in the treated tissue, hemoglobin blood concentration, mean corpuscular hemoglobin (MCH), hematocrit, erythrocyte, neutrophil and lymphocyte blood count, and erythrocytes percentage in spleen were determined. RESULTS Iron concentration in the treated tissue was significantly higher in wild-type inflammatory group (WT-I) when compared to both, the wild-type control group (WT-C) and ST2-/- inflammatory group (KO-I). There was no significant difference in iron concentration between ST2-/- control group (KO-C) and the KO-I. MCH had significantly decreased in WT-I when compared to WT-C, while there was no significant difference between KO-C and KO-I. Hemoglobin blood concentration significantly increased in KO-I in comparison to KO-C, while it did not significantly differ between WT-I and KO-I. Erythrocyte count and hematocrit had significantly increased, while the percentage of erythrocytes in spleen decreased in both inflammatory groups when compared to their controls. Neutrophil count significantly decreased in WT-I, when compared to WT-C. Lymphocyte count decreased in both inflammatory groups when compared to their controls. CONCLUSION Results of this study indicate that the IL-33/ST2 axis could have a role in the alteration of iron in acute inflammation, namely in an increase of iron concentration at the site of acute inflammation and a decrease of blood mean corpuscular hemoglobin.
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Affiliation(s)
- Marija S Stankovic
- Department of Pathophysiology, Faculty of Medicine, University of Belgrade, Dr Subotica 8, 11000, Belgrade, Serbia.
| | - Vladimir Turuntas
- Pediatrics, University hospital Foca, Studentska 5, 73300 Foca, Bosnia and Herzegovina
| | - Silvio R De Luka
- Department of Pathophysiology, Faculty of Medicine, University of Belgrade, Dr Subotica 8, 11000, Belgrade, Serbia
| | - Sasa Jankovic
- Institute of Meat Hygiene and Technology, Kacanskog 13, 11000, Belgrade, Serbia
| | - Srdjan Stefanovic
- Institute of Meat Hygiene and Technology, Kacanskog 13, 11000, Belgrade, Serbia
| | - Nela Puskas
- Institute of Histology and Embryology "Aleksandar Đ. Kostić", School of Medicine, University of Belgrade, Dr Subotica 8, 11000, Belgrade, Serbia
| | - Ivan Zaletel
- Institute of Histology and Embryology "Aleksandar Đ. Kostić", School of Medicine, University of Belgrade, Dr Subotica 8, 11000, Belgrade, Serbia
| | - Sanja Milutinović-Smiljanic
- General and Oral Histology and Embryology, Faculty of Dentistry, University of Belgrade, Dr Subotica 8, 11000, Belgrade, Serbia
| | - Alexander M Trbovich
- Department of Pathophysiology, Faculty of Medicine, University of Belgrade, Dr Subotica 8, 11000, Belgrade, Serbia.
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Auclair G, Borgel J, Sanz LA, Vallet J, Guibert S, Dumas M, Cavelier P, Girardot M, Forné T, Feil R, Weber M. EHMT2 directs DNA methylation for efficient gene silencing in mouse embryos. Genome Res 2015; 26:192-202. [PMID: 26576615 PMCID: PMC4728372 DOI: 10.1101/gr.198291.115] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [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: 08/13/2015] [Accepted: 11/13/2015] [Indexed: 12/30/2022]
Abstract
The extent to which histone modifying enzymes contribute to DNA methylation in mammals remains unclear. Previous studies suggested a link between the lysine methyltransferase EHMT2 (also known as G9A and KMT1C) and DNA methylation in the mouse. Here, we used a model of knockout mice to explore the role of EHMT2 in DNA methylation during mouse embryogenesis. The Ehmt2 gene is expressed in epiblast cells but is dispensable for global DNA methylation in embryogenesis. In contrast, EHMT2 regulates DNA methylation at specific sequences that include CpG-rich promoters of germline-specific genes. These loci are bound by EHMT2 in embryonic cells, are marked by H3K9 dimethylation, and have strongly reduced DNA methylation in Ehmt2−/− embryos. EHMT2 also plays a role in the maintenance of germline-derived DNA methylation at one imprinted locus, the Slc38a4 gene. Finally, we show that DNA methylation is instrumental for EHMT2-mediated gene silencing in embryogenesis. Our findings identify EHMT2 as a critical factor that facilitates repressive DNA methylation at specific genomic loci during mammalian development.
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Affiliation(s)
- Ghislain Auclair
- CNRS, University of Strasbourg, UMR7242 Biotechnology and Cell Signaling, 67412 Illkirch, France
| | - Julie Borgel
- Institute of Molecular Genetics, CNRS UMR5535, University of Montpellier, 34293 Montpellier, France
| | - Lionel A Sanz
- Institute of Molecular Genetics, CNRS UMR5535, University of Montpellier, 34293 Montpellier, France
| | - Judith Vallet
- CNRS, University of Strasbourg, UMR7242 Biotechnology and Cell Signaling, 67412 Illkirch, France
| | - Sylvain Guibert
- CNRS, University of Strasbourg, UMR7242 Biotechnology and Cell Signaling, 67412 Illkirch, France
| | - Michael Dumas
- CNRS, University of Strasbourg, UMR7242 Biotechnology and Cell Signaling, 67412 Illkirch, France
| | - Patricia Cavelier
- Institute of Molecular Genetics, CNRS UMR5535, University of Montpellier, 34293 Montpellier, France
| | - Michael Girardot
- Institute of Molecular Genetics, CNRS UMR5535, University of Montpellier, 34293 Montpellier, France
| | - Thierry Forné
- Institute of Molecular Genetics, CNRS UMR5535, University of Montpellier, 34293 Montpellier, France
| | - Robert Feil
- Institute of Molecular Genetics, CNRS UMR5535, University of Montpellier, 34293 Montpellier, France
| | - Michael Weber
- CNRS, University of Strasbourg, UMR7242 Biotechnology and Cell Signaling, 67412 Illkirch, France
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Kim W, Woo HD, Lee J, Choi IJ, Kim YW, Sung J, Kim J. Dietary folate, one-carbon metabolism-related genes, and gastric cancer risk in Korea. Mol Nutr Food Res 2015; 60:337-45. [PMID: 26833750 DOI: 10.1002/mnfr.201500384] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Revised: 08/24/2015] [Accepted: 09/18/2015] [Indexed: 12/12/2022]
Abstract
SCOPE We evaluated the interactions between polymorphisms involved in one-carbon metabolism-related genes and dietary folate intake in gastric cancer risk within the Korean population through a hospital-based case-control study. METHODS AND RESULTS A total of 542 controls and 271 cases were included. Genotype data were selected from data produced by the Affymetrix Axiom(®) Exome 319 Array. We considered seven single nucleotide polymorphisms (SNPs) of five genes whose SNPs are located in the coding region with a minor allele frequency > 5%: MTHFR (G1793A, A1298C, C677T), MTR A2756G, MTRR A66G, SHMT1 C1420T, and SLC19A1 G80A. Our study found that MTR A2756G was associated with a decreased gastric cancer risk. MTHFR G1793A showed a statistically significant interaction between dietary folate intake and gastric cancer. CONCLUSION Our results suggest that MTR A2756G is significantly associated with gastric cancer risk, and that MTHFR G1793A statistically interacts with dietary folate intake. Our findings indicate that gene-folate interactions may contribute to gastric cancer risk.
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Affiliation(s)
- Woori Kim
- Molecular Epidemiology Branch, Division of Cancer Epidemiology and Prevention, National Cancer Center, Goyang, Korea
| | - Hae Dong Woo
- Molecular Epidemiology Branch, Division of Cancer Epidemiology and Prevention, National Cancer Center, Goyang, Korea
| | - Jeonghee Lee
- Molecular Epidemiology Branch, Division of Cancer Epidemiology and Prevention, National Cancer Center, Goyang, Korea
| | - Il Ju Choi
- Center for Gastric Cancer, National Cancer Center Hospital, National Cancer Center, Goyang, Korea
| | - Young Woo Kim
- Center for Gastric Cancer, National Cancer Center Hospital, National Cancer Center, Goyang, Korea
| | - Joohon Sung
- Department of Epidemiology, School of Public Health and Institute of Health and Environment, Seoul National University, Seoul, Korea
| | - Jeongseon Kim
- Molecular Epidemiology Branch, Division of Cancer Epidemiology and Prevention, National Cancer Center, Goyang, Korea
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72871
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McDermott S, Salzberg DC, Anderson AP, Shaw T, Lead J. Systematic Review of Chromium and Nickel Exposure During Pregnancy and Impact on Child Outcomes. J Toxicol Environ Health A 2015; 78:1348-1368. [PMID: 26571332 DOI: 10.1080/15287394.2015.1090939] [Citation(s) in RCA: 30] [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] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Some forms of chromium (Cr) and nickel (Ni) are toxic, especially with chronic elevated exposure, and certain forms such as hexavalent chromium or nickel carbonyl were labeled as carcinogens. Since both metals are naturally occurring, and used in industrial processes, individuals may be exposed through ingestion of contaminated food or water, inhalation, or dermal contact. This study focused on the impact of toxic forms of Cr and Ni during pregnancy and outcomes in newborn and young children. A systematic literature review following "The Navigation Guide" was applied, and 16 reports that satisfied the inclusion criteria were scored. Six papers studied birth weight, prematurity, or gestational age: one found an association between Ni and small for gestational age, while another linked Ni with low birth weight; however, four reported no marked associations. Of six studies that examined birth defects, three found no significant associations; one noted an association between Ni and neural tube defects; one showed an association between Ni and structural birth defects; and one reported a weak effect for Cr exposure and musculoskeletal defects. In the remaining four studies, weak associations were found for hexavalent Cr and neuroblastoma, Ni and autism spectrum disorder, Cr and Ni and DNA damage, and Cr and lymphocyte damage. Among the studies that were rated as good for execution and reliability, there was weak evidence of an association between Ni and autism spectrum disorder and small for gestational age, but no significant association between Cr and a child outcome.
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Affiliation(s)
| | - Deborah C Salzberg
- a Department of Epidemiology & Biostatistics , University of South Carolina , Columbia , South Carolina , USA
| | - Anna Paige Anderson
- a Department of Epidemiology & Biostatistics , University of South Carolina , Columbia , South Carolina , USA
| | - Timothy Shaw
- b Department of Chemistry & Biochemistry , University of South Carolina , Columbia , South Carolina , USA
| | - Jamie Lead
- c Department of Environmental Health Sciences , University of South Carolina , Columbia , South Carolina , USA
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72872
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Kato M, Atsumi T. Reactivation of occult hepatitis B virus infection in patients with rheumatic diseases: pathogenesis, risk assessment and prevention. Rheumatol Int 2015; 36:635-41. [PMID: 26573663 DOI: 10.1007/s00296-015-3395-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Accepted: 11/06/2015] [Indexed: 12/20/2022]
Abstract
Over the past decade, reactivation of occult hepatitis B virus (HBV) infection has garnered much attention from rheumatologists owing to a number of reports which have indicated the potential risk of biologics in causing this previously ignored infectious complication. Hepatitis due to reactivation of occult HBV infection occurs only occasionally but with high mortality upon occurrence, placing us in a clinical dilemma "to address or not to address?" In this review, we discuss how biological and other immunosuppressive therapies increase the risk of developing reactivation of occult HBV infection and attempt to solve this clinical quandary.
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Affiliation(s)
- Masaru Kato
- Division of Rheumatology, Endocrinology and Nephrology, Graduate School of Medicine, Hokkaido University, N15W7, Kita-Ku, Sapporo, 060-8638, Japan.
| | - Tatsuya Atsumi
- Division of Rheumatology, Endocrinology and Nephrology, Graduate School of Medicine, Hokkaido University, N15W7, Kita-Ku, Sapporo, 060-8638, Japan
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Zhu L, Gao J, Huang K, Luo Y, Zhang B, Xu W. miR-34a screened by miRNA profiling negatively regulates Wnt/β-catenin signaling pathway in Aflatoxin B1 induced hepatotoxicity. Sci Rep 2015; 5:16732. [PMID: 26567713 PMCID: PMC4645126 DOI: 10.1038/srep16732] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Accepted: 10/19/2015] [Indexed: 12/15/2022] Open
Abstract
Aflatoxin-B1 (AFB1), a hepatocarcinogenic mycotoxin, was demonstrated to induce the high rate of hepatocellular carcinoma (HCC). MicroRNAs (miRNAs) participate in the regulation of several biological processes in HCC. However, the function of miRNAs in AFB1-induced HCC has received a little attention. Here, we applied Illumina deep sequencing technology for high-throughout profiling of microRNAs in HepG2 cells lines after treatment with AFB1. Analysis of the differential expression profile of miRNAs in two libraries, we identified 9 known miRNAs and 1 novel miRNA which exhibited abnormal expression. KEGG analysis indicated that predicted target genes of differentially expressed miRNAs are involved in cancer-related pathways. Down-regulated of Drosha, DGCR8 and Dicer 1 indicated an impairment of miRNA biogenesis in response to AFB1. miR-34a was up-regulated significantly, down-regulating the expression of Wnt/β-catenin signaling pathway by target gene β-catenin. Anti-miR-34a can significantly relieved the down-regulated β-catenin and its downstream genes, c-myc and Cyclin D1, and the S-phase arrest in cell cycle induced by AFB1 can also be relieved. These results suggested that AFB1 might down-regulate Wnt/β-catenin signaling pathway in HepG2 cells by up-regulating miR-34a, which may involve in the mechanism of liver tumorigenesis.
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Affiliation(s)
- Liye Zhu
- Laboratory of Food Safety, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China, 100083
| | - Jing Gao
- Beijing Laboratory for Food Quality and Safety, Beijing, P. R. China
| | - Kunlun Huang
- Laboratory of Food Safety, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China, 100083
- Beijing Laboratory for Food Quality and Safety, Beijing, P. R. China
| | - Yunbo Luo
- Laboratory of Food Safety, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China, 100083
- Beijing Laboratory for Food Quality and Safety, Beijing, P. R. China
| | - Boyang Zhang
- Laboratory of Food Safety, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China, 100083
| | - Wentao Xu
- Laboratory of Food Safety, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China, 100083
- Beijing Laboratory for Food Quality and Safety, Beijing, P. R. China
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Atluri VS, Hidalgo M, Samikkannu T, Kurapati KR, Nair M. Synaptic Plasticity and Neurological Disorders in Neurotropic Viral Infections. Neural Plast 2015; 2015:138979. [PMID: 26649202 DOI: 10.1155/2015/138979] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Revised: 06/16/2015] [Accepted: 06/18/2015] [Indexed: 12/13/2022] Open
Abstract
Based on the type of cells or tissues they tend to harbor or attack, many of the viruses are characterized. But, in case of neurotropic viruses, it is not possible to classify them based on their tropism because many of them are not primarily neurotropic. While rabies and poliovirus are considered as strictly neurotropic, other neurotropic viruses involve nervous tissue only secondarily. Since the AIDS pandemic, the interest in neurotropic viral infections has become essential for all clinical neurologists. Although these neurotropic viruses are able to be harbored in or infect the nervous system, not all the neurotropic viruses have been reported to cause disrupted synaptic plasticity and impaired cognitive functions. In this review, we have discussed the neurotropic viruses, which play a major role in altered synaptic plasticity and neurological disorders.
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Tsai ST, Wang PJ, Liou NJ, Lin PS, Chen CH, Chang WC. ICAM1 Is a Potential Cancer Stem Cell Marker of Esophageal Squamous Cell Carcinoma. PLoS One 2015; 10:e0142834. [PMID: 26571024 PMCID: PMC4646358 DOI: 10.1371/journal.pone.0142834] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Accepted: 10/27/2015] [Indexed: 12/13/2022] Open
Abstract
Esophageal squamous cell carcinoma (ESCC) accounts for about 90% of esophageal cancer diagnosed in Asian countries, with its incidence on the rise. Cancer stem cell (CSC; also known as tumor-initiating cells, TIC) is inherently resistant to cytotoxic chemotherapy and radiation and associates with poor prognosis and therapy failure. Targeting therapy against cancer stem cell has emerged as a potential therapeutic approach to develop effective regimens. However, the suitable CSC marker of ESCC for identification and targeting is still limited. In this study, we screened the novel CSC membrane protein markers using two distinct stemness characteristics of cancer cell lines by a comparative approach. After the validation of RT-PCR, qPCR and western blot analyses, intercellular adhesion molecule 1 (ICAM1) was identified as a potential CSC marker of ESCC. ICAM1 promotes cancer cell migration, invasion as well as increasing mesenchymal marker expression and attenuating epithelial marker expression. In addition, ICAM1 contributes to CSC properties, including sphere formation, drug resistance, and tumorigenesis in mouse xenotransplantation model. Based on the analysis of ICAM1-regulated proteins, we speculated that ICAM1 regulates CSC properties partly through an ICAM1-PTTG1IP-p53-DNMT1 pathway. Moreover, we observed that ICAM1 and CD44 could have a compensation effect on maintaining the stemness characteristics of ESCC, suggesting that the combination of multi-targeting therapies should be under serious consideration to acquire a more potent therapeutic effect on CSC of ESCC.
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Affiliation(s)
- Sheng-Ta Tsai
- Institute of Biochemistry & Molecular Biology, National Yang-Ming University, Taipei, Taiwan
- Genomics Research Center, Academia Sinica, Taipei, Taiwan
| | - Po-Jen Wang
- Graduate Institute of Cancer Biology, China Medical University, Taichung, Taiwan
| | - Nia-Jhen Liou
- Center for Molecular Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Pei-Shan Lin
- Center for Molecular Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Chung-Hsuan Chen
- Institute of Biochemistry & Molecular Biology, National Yang-Ming University, Taipei, Taiwan
- Genomics Research Center, Academia Sinica, Taipei, Taiwan
- Department of Chemistry, National Taiwan University, Taipei, Taiwan
- Institute of Atomic & Molecular Sciences, Academia Sinica, Taipei, Taiwan
| | - Wei-Chao Chang
- Graduate Institute of Cancer Biology, China Medical University, Taichung, Taiwan
- Center for Molecular Medicine, China Medical University Hospital, Taichung, Taiwan
- * E-mail:
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Lim JY, Nam JS, Yang SE, Shin H, Jang YH, Bae GU, Kang T, Lim KI, Choi Y. Identification of Newly Emerging Influenza Viruses by Surface-Enhanced Raman Spectroscopy. Anal Chem 2015; 87:11652-9. [DOI: 10.1021/acs.analchem.5b02661] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Jae-young Lim
- Department
of Bio-convergence Engineering, Korea University, Seoul, 136-713, Korea
| | - Jung-soo Nam
- Department of Medical & Pharmaceutical Sciences, Sookmyung Women’s University, Seoul, 140-742, Korea
| | - Se-eun Yang
- Department
of Bio-convergence Engineering, Korea University, Seoul, 136-713, Korea
| | - Hyunku Shin
- Department
of Bio-convergence Engineering, Korea University, Seoul, 136-713, Korea
| | - Yoon-ha Jang
- Department of Medical & Pharmaceutical Sciences, Sookmyung Women’s University, Seoul, 140-742, Korea
| | - Gyu-Un Bae
- Research
Center for Cell Fate Control, College of Pharmacy, Sookmyung Women’s University, Seoul, 140-742, Korea
| | - Taewook Kang
- Department of Chemical & Biomolecular Engineering, Sogang University, Seoul, 121-742, Korea
| | - Kwang-il Lim
- Department of Medical & Pharmaceutical Sciences, Sookmyung Women’s University, Seoul, 140-742, Korea
| | - Yeonho Choi
- Department
of Bio-convergence Engineering, Korea University, Seoul, 136-713, Korea
- School
of Biomedical Engineering, Korea University, Seoul, 136-713, Korea
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Zhu X, Wang W, Zhang X, Bai J, Chen G, Li L, Li M. All-Trans Retinoic Acid-Induced Deficiency of the Wnt/β-Catenin Pathway Enhances Hepatic Carcinoma Stem Cell Differentiation. PLoS One. 2015;10:e0143255. [PMID: 26571119 DOI: 10.1371/journal.pone.0143255] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Accepted: 11/02/2015] [Indexed: 01/03/2023] Open
Abstract
Retinoic acid (RA) is an important biological signal that directly differentiates cells during embryonic development and tumorigenesis. However, the molecular mechanism of RA-mediated differentiation in hepatic cancer stem cells (hCSCs) is not well understood. In this study, we found that mRNA expressions of RA-biosynthesis-related dehydrogenases were highly expressed in hepatocellular carcinoma. All-trans retinoic acid (ATRA) differentiated hCSCs through inhibiting the function of β-catenin in vitro. ATRA also inhibited the function of PI3K-AKT and enhanced GSK-3β-dependent degradation of phosphorylated β-catenin. Furthermore, ATRA and β-catenin silencing both increased hCSC sensitivity to docetaxel treatment. Our results suggest that targeting β-catenin will provide extra benefits for ATRA-mediated treatment of hepatic cancer patients.
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Savina NV, Nikitchenko NV, Kuzhir TD, Rolevich AI, Krasny SA, Goncharova RI. The Cellular Response to Oxidatively Induced DNA Damage and Polymorphism of Some DNA Repair Genes Associated with Clinicopathological Features of Bladder Cancer. Oxid Med Cell Longev 2016; 2016:5710403. [PMID: 26649138 DOI: 10.1155/2016/5710403] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 06/26/2015] [Accepted: 07/21/2015] [Indexed: 12/17/2022]
Abstract
Genome instability and impaired DNA repair are hallmarks of carcinogenesis. The study was aimed at evaluating the DNA damage response in H2O2-treated lymphocytes using the alkaline comet assay in bladder cancer (BC) patients as compared to clinically healthy controls, elderly persons, and individuals with chronic inflammations. Polymorphism in DNA repair genes involved in nucleotide excision repair (NER) and base excision repair (BER) was studied using the PCR-RFLP method in the Belarusian population to elucidate the possible association of their variations with both bladder cancer risk and clinicopathological features of tumors. The increased level of H2O2-induced DNA damage and a higher proportion of individuals sensitive to oxidative stress were found among BC patients as compared to other groups under study. Heterozygosity in the XPD gene (codon 751) increased cancer risk: OR (95% CI) = 1.36 (1.03-1.81), p = 0.031. The frequency of the XPD 312Asn allele was significantly higher in T ≥ 2 high grade than in T ≥ 2 low grade tumors (p = 0.036); the ERCC6 1097Val/Val genotype was strongly associated with muscle-invasive tumors. Combinations of homozygous wild type alleles occurred with the increased frequency in patients with non-muscle-invasive tumors suggesting that the maintenance of normal DNA repair activity may prevent cancer progression.
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72879
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Abstract
Nuclear factor κB (NF-κB) is a family of inducible transcription factors that plays a vital role in different aspects of immune responses. NF-κB is normally sequestered in the cytoplasm as inactive complexes via physical association with inhibitory proteins termed IκBs. In response to immune and stress stimuli, NF-κB members become activated via two major signaling pathways, the canonical and noncanonical pathways, and move to the nucleus to exert transcriptional functions. NF-κB is vital for normal immune responses against infections, but deregulated NF-κB activation is a major cause of inflammatory diseases. Accumulated studies suggest the involvement of NF-κB in the pathogenesis of renal inflammation caused by infection, injury, or autoimmune factors. In this review, we discuss the current understanding regarding the activation and function of NF-κB in different types of kidney diseases.
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Affiliation(s)
- Haisong Zhang
- />Department of Nephrology, Affiliated Hospital of Hebei University, No. 213 Yuhuadonglu, Baoding, 071000 China
| | - Shao-Cong Sun
- />Department of Immunology, The University of Texas MD Anderson Cancer Center, 7455 Fannin Street, Box 902, Houston, TX 77030 USA
- />The University of Texas Graduate School of Biomedical Sciences at Houston, Houston, TX 77030 USA
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Xu X, Chen X, Zhang J, Guo P, Fu T, Dai Y, Lin SL, Huo X. Decreased blood hepatitis B surface antibody levels linked to e-waste lead exposure in preschool children. J Hazard Mater 2015; 298:122-8. [PMID: 26022852 DOI: 10.1016/j.jhazmat.2015.05.020] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [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: 12/30/2014] [Revised: 04/30/2015] [Accepted: 05/13/2015] [Indexed: 02/05/2023]
Abstract
Lead (Pb) is a widespread environmental contaminant that can profoundly affect the immune system in vaccinated children. To explore the association between blood Pb and HBsAb levels in children chronically exposed to Pb, we measured hepatitis B surface antibody (HBsAb) titers, to reflect the immune response in the children of Guiyu, an electronic and electrical waste (e-waste) recycling area well known for environmental Pb contamination. We performed secondary exploratory analyses of blood Pb levels and plasma HBsAb titers in samples, taken in two phases between 2011 and 2012, from 590 children from Guiyu (exposed group) and Haojiang (reference group). Children living in the exposed area had higher blood Pb levels and lower HBsAb titers compared with children from the reference area. At each phase, generalized linear mixed models (GLMMs) showed that HBsAb titers were significantly negatively associated with child blood Pb levels. This work shows that a decreased immune response to hepatitis B vaccine and immune system might have potential harm to children with chronic Pb exposure. Importantly, nearly 50% of chronically exposed children failed to develop sufficient immunity to hepatitis in response to vaccination. Thus different vaccination strategies are needed for children living under conditions of chronic Pb exposure.
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Affiliation(s)
- Xijin Xu
- Laboratory of Environmental Medicine and Developmental Toxicology, and Guangdong Provincial Key Laboratory of Infectious Diseases, Shantou University Medical College, Shantou 515041, Guangdong, China; Department of Cell Biology and Genetics, Shantou University Medical College, Shantou 515041, Guangdong, China
| | - Xiaojuan Chen
- Laboratory of Environmental Medicine and Developmental Toxicology, and Guangdong Provincial Key Laboratory of Infectious Diseases, Shantou University Medical College, Shantou 515041, Guangdong, China
| | - Jian Zhang
- Laboratory of Environmental Medicine and Developmental Toxicology, and Guangdong Provincial Key Laboratory of Infectious Diseases, Shantou University Medical College, Shantou 515041, Guangdong, China
| | - Pi Guo
- Department of Public Health, Shantou University Medical College, Shantou 515041, Guangdong, China
| | - Tingzao Fu
- Laboratory of Environmental Medicine and Developmental Toxicology, and Guangdong Provincial Key Laboratory of Infectious Diseases, Shantou University Medical College, Shantou 515041, Guangdong, China
| | - Yifeng Dai
- Laboratory of Environmental Medicine and Developmental Toxicology, and Guangdong Provincial Key Laboratory of Infectious Diseases, Shantou University Medical College, Shantou 515041, Guangdong, China
| | - Stanley L Lin
- Department of Pathophysiology and Key Immunopathology Laboratory of Guangdong Province, Shantou University Medical College, Shantou 515041, Guangdong, China
| | - Xia Huo
- Laboratory of Environmental Medicine and Developmental Toxicology, and Guangdong Provincial Key Laboratory of Infectious Diseases, Shantou University Medical College, Shantou 515041, Guangdong, China.
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72881
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Li H, Jiang Z, Liu X, Yang Z. Higher plasma level of STIM1, OPG are correlated with stent restenosis after PCI. Int J Clin Exp Med 2015; 8:21089-21097. [PMID: 26885040 PMCID: PMC4723885] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2015] [Accepted: 11/02/2015] [Indexed: 06/05/2023]
Abstract
OBJECT Percutaneous Coronary Intervention (PCI) is one of the most effective treatments for Coronary Heart Disease (CHD), but the high rate of In Stent Restenosis (ISR) has plagued clinicians after PCI. We aim to investigate the correlation of plasma Stromal Interaction Molecular 1 (STIM1) and Osteoprotegerin (OPG) level with stent restenosis after PCI. METHODS A total of 100 consecutive patients with Coronary Heart Disease (CHD) received PCI procedure were recruited. Coronary angiography was performed 8 months after their PCI. Then patients were divided into 2 groups: observation group was composed by patients who existing postoperative stenosis after intervention; Control group was composed by patients with no postoperative stenosis. The plasma levels of STIM, OPG in all patients were tested before and after intervention. Pearson correlation and multiple linear regression analysis were performed to analysis the correlation between STIM, OPG level and postoperative stenosis. RESULTS 35 cases were divided into observation group and other 65 were divided into control group. The plasma levels of STIM, OPG have no statistical difference before their PCI procedure, but we observed higher level of High-sensitivity C-reactive protein (Hs-CRP) existed in observation group. We observed higher level of plasma STIM, OPG in observation group when compared with control group after PCI procedure (P < 0.05). Regression analysis demonstrated that Hs-CRP, STIM1, OPG are independent risk factors for ISR. CONCLUSION Elevated levels of plasma STIM1, OPG are independent risk factors for ISR in patients received PCI, which could provide useful information for the restenosis control after PCI.
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Affiliation(s)
- Haibin Li
- Department of Cardiology, Third Affiliated Hospital of Hebei Medical UniversityHebei, China
| | - Zhian Jiang
- Department of Cardiology, Third Affiliated Hospital of Hebei Medical UniversityHebei, China
| | - Xiangdong Liu
- Department of International Radiology, Third Affiliated Hospital of Hebei Medical UniversityHebei, China
| | - Zhihui Yang
- Department of Cardiology, Third Affiliated Hospital of Hebei Medical UniversityHebei, China
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Vrahatis AG, Dimitrakopoulou K, Balomenos P, Tsakalidis AK, Bezerianos A. CHRONOS: a time-varying method for microRNA-mediated subpathway enrichment analysis. ACTA ACUST UNITED AC 2015; 32:884-92. [PMID: 26568631 DOI: 10.1093/bioinformatics/btv673] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Accepted: 11/09/2015] [Indexed: 12/14/2022]
Abstract
MOTIVATION In the era of network medicine and the rapid growth of paired time series mRNA/microRNA expression experiments, there is an urgent need for pathway enrichment analysis methods able to capture the time- and condition-specific 'active parts' of the biological circuitry as well as the microRNA impact. Current methods ignore the multiple dynamical 'themes'-in the form of enriched biologically relevant microRNA-mediated subpathways-that determine the functionality of signaling networks across time. RESULTS To address these challenges, we developed time-vaRying enriCHment integrOmics Subpathway aNalysis tOol (CHRONOS) by integrating time series mRNA/microRNA expression data with KEGG pathway maps and microRNA-target interactions. Specifically, microRNA-mediated subpathway topologies are extracted and evaluated based on the temporal transition and the fold change activity of the linked genes/microRNAs. Further, we provide measures that capture the structural and functional features of subpathways in relation to the complete organism pathway atlas. Our application to synthetic and real data shows that CHRONOS outperforms current subpathway-based methods into unraveling the inherent dynamic properties of pathways. AVAILABILITY AND IMPLEMENTATION CHRONOS is freely available at http://biosignal.med.upatras.gr/chronos/ CONTACT tassos.bezerianos@nus.edu.sg SUPPLEMENTARY INFORMATION Supplementary data are available at Bioinformatics online.
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Affiliation(s)
- Aristidis G Vrahatis
- Department of Computer Engineering and Informatics, Department of Medical Physics, School of Medicine, University of Patras, Patras 26500, Greece
| | - Konstantina Dimitrakopoulou
- Centre for Cancer Biomarkers CCBIO and Computational Biology Unit, Department of Informatics, University of Bergen, Bergen, Norway and
| | - Panos Balomenos
- Department of Computer Engineering and Informatics, Department of Medical Physics, School of Medicine, University of Patras, Patras 26500, Greece
| | | | - Anastasios Bezerianos
- Department of Medical Physics, School of Medicine, University of Patras, Patras 26500, Greece, SINAPSE Institute, Center of Life Sciences, National University of Singapore, Singapore 117456
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72883
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Tamaki N, Hirata K. Tumor hypoxia: a new PET imaging biomarker in clinical oncology. Int J Clin Oncol 2015; 21:619-625. [DOI: 10.1007/s10147-015-0920-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Accepted: 10/20/2015] [Indexed: 01/02/2023]
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72884
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Liu Z, Fang CT. A modeling study of human infections with avian influenza A H7N9 virus in mainland China. Int J Infect Dis 2015; 41:73-8. [PMID: 26585941 DOI: 10.1016/j.ijid.2015.11.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [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: 07/28/2015] [Revised: 11/02/2015] [Accepted: 11/06/2015] [Indexed: 11/24/2022] Open
Abstract
OBJECTIVES Since February 2013, more than 400 laboratory-confirmed human cases of avian influenza A H7N9 infection have been reported in mainland China. Little is known of the dynamics of this novel virus in poultry and human populations, which is essential for developing effective long-term control strategies for this zoonosis. The aim of this study was to evaluate the impact of screening and culling of infected poultry on the evolution of the H7N9 epidemic. METHODS A mathematical model for transmission dynamics of avian influenza A H7N9 virus in human and poultry populations was constructed. Parameters in the model were estimated using publicly available nationwide surveillance data on animal and human infections. RESULTS By fitting a two-host model, it was shown that screening for H7N9 in poultry and culling could effectively decrease the number of new human H7N9 cases. Furthermore, the elimination of circulating H7N9 virus is possible if an intensive, but technically feasible, poultry screening and culling policy is adopted. CONCLUSIONS Screening and culling infected poultry is a critical measure for preventing human H7N9 infections in the long term. This model may provide important insights for decision-making on a national intervention strategy for the long-term control of the H7N9 virus epidemic.
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Affiliation(s)
- Zhifei Liu
- School of Public Health, Lanzhou University, Lanzhou, mainland China
| | - Chi-Tai Fang
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, 17 Xu-Zhou Road, Taipei 100, Taiwan; Division of Infectious Diseases, Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan.
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72885
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Vågberg W, Larsson DH, Li M, Arner A, Hertz HM. X-ray phase-contrast tomography for high-spatial-resolution zebrafish muscle imaging. Sci Rep 2015; 5:16625. [PMID: 26564785 DOI: 10.1038/srep16625] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Accepted: 10/16/2015] [Indexed: 12/11/2022] Open
Abstract
Imaging of muscular structure with cellular or subcellular detail in whole-body animal models is of key importance for understanding muscular disease and assessing interventions. Classical histological methods for high-resolution imaging methods require excision, fixation and staining. Here we show that the three-dimensional muscular structure of unstained whole zebrafish can be imaged with sub-5 μm detail with X-ray phase-contrast tomography. Our method relies on a laboratory propagation-based phase-contrast system tailored for detection of low-contrast 4–6 μm subcellular myofibrils. The method is demonstrated on 20 days post fertilization zebrafish larvae and comparative histology confirms that we resolve individual myofibrils in the whole-body animal. X-ray imaging of healthy zebrafish show the expected structured muscle pattern while specimen with a dystrophin deficiency (sapje) displays an unstructured pattern, typical of Duchenne muscular dystrophy. The method opens up for whole-body imaging with sub-cellular detail also of other types of soft tissue and in different animal models.
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72886
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Rubio N, Sanz-Rodriguez F. Overexpression of caspase 1 in apoptosis-resistant astrocytes infected with the BeAn Theiler's virus. J Neurovirol 2015; 22:316-26. [PMID: 26567013 DOI: 10.1007/s13365-015-0400-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Revised: 10/10/2015] [Accepted: 10/27/2015] [Indexed: 01/19/2023]
Abstract
In this study, we demonstrate the upregulation in the expression of caspases 1 and 11 by SJL/J mouse brain astrocytes infected with the BeAn strain of Theiler's murine encephalomyelitis virus (TMEV). The upregulation of both proteases hints at protection of astrocytic cells from apoptotic death. We therefore looked for the reason of the demonstrated absence of programmed cell death in BeAn-infected SJL/J astrocytes. Complementary RNA (cRNA) from mock- and TMEV-infected cells was hybridized to the whole murine genome U74v2 DNA microarray from Affymetrix. Those experiments demonstrated the upregulation of gene expression for caspases 1 and 11 in infected cells. We further confirmed and validated their messenger RNA (mRNA) increase by reverse transcriptase quantitative real-time PCR (qPCR). The presence of both enzymatically active caspases 1 and 11 was demonstrated in cell lysates using a colorimetric and fluorymetric assay, respectively. We also show that overexpressed caspase 11 activated caspase 1 after preincubation of cytosol in vitro following a time-dependent process. This induction was neutralized by an anti-caspase 11 polyclonal antibody. These results demonstrate the activation of the caspase 1 precursor by caspase 11 and suggest a new mechanism of protection of BeAn-infected astrocytes from apoptosis. The direct experimental evidence that the protection effect demonstrated in this article was mediated by caspase 1, is provided by the fact that its specific inhibitor Z-WEHD-FMK induced de novo apoptotic death.
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Affiliation(s)
- Nazario Rubio
- Instituto Cajal. C.S.I.C, Dr. Arce Avenue 37, 28002, Madrid, Spain.
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72887
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Abstract
The emergence of targetted therapy has revolutionised the treatment of advanced NSCLC. Increasing numbers of driver genes and related targetted agents have supplied more powerful weapons for conquering NSCLC. Depending on whether there are clear targets and therapeutic effects, we can now rank targetted agents into three categories: agents with explicit targets and pure effects, agents with theoretical targets but with no effective biomarkers, agents with vague targets and lower effects. The latest clinical data on the safety and efficacy of monotherapy with three kinds of agents will be reviewed respectively in this article.
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Affiliation(s)
- Qi Zhang
- a Graduate School , Southern Medical University , Guangzhou , Guangdong , PR China.,b Guangdong Lung Cancer Institute , Guangdong General Hospital and Guangdong Academy of Medical Sciences , Guangzhou , Guangdong , PR China
| | - Yi-Long Wu
- b Guangdong Lung Cancer Institute , Guangdong General Hospital and Guangdong Academy of Medical Sciences , Guangzhou , Guangdong , PR China
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72888
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Abstract
Infertility treatment in couples where one or both parents are infected with hepatitis raises many concerns about transmission of the infection to the baby, laboratory technicians, and medical staff, and contamination of other gametes/embryos that are from virus-free parents in the same laboratory. Exposure to the other partner is only a risk when the couple's hepatitis status is discordant. The management of infertility, in association with HBV or HCV, has sparked debates about the potential risk of spread of infection to virus-free individuals, embryos, and/or semen. This risk can only be minimized or eliminated by the use of SOPs for safety in fertility clinics and by the use of proper initial detection and segregation of potentially hazardous materials. HBV may interfere with the development of embryos and even result in abortion and other adverse outcomes. Although sexual transmission of HCV is very low, in subfertile or infertile couples sperm washing should be used to treat HCV-positive semen before ART. Testing for HBsAg and HCV should be offered to high-risk infertile couples seeking fertility therapy to reduce the potential risk of transmission to an uninfected partner, baby, staff members, and disease-free gametes and embryos in the same laboratory. Testing for HIV, HBsAg, and HCV status should be performed on the couple prior to cryopreservation of semen or embryos.
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Kisch T, Weber C, Rapoport DH, Kruse C, Schumann S, Stang FH, Siemers F, Matthießen AE. LPS-Stimulated Human Skin-Derived Stem Cells Enhance Neo-Vascularization during Dermal Regeneration. PLoS One 2015; 10:e0142907. [PMID: 26565617 DOI: 10.1371/journal.pone.0142907] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Accepted: 10/28/2015] [Indexed: 11/26/2022] Open
Abstract
High numbers of adult stem cells are still required to improve the formation of new vessels in scaffolds to accelerate dermal regeneration. Recent data indicate a benefit for vascularization capacity by stimulating stem cells with lipopolysaccharide (LPS). In this study, stem cells derived from human skin (SDSC) were activated with LPS and seeded in a commercially available dermal substitute to examine vascularization in vivo. Besides, in vitro assays were performed to evaluate angiogenic factor release and tube formation ability. Results showed that LPS-activated SDSC significantly enhanced vascularization of the scaffolds, compared to unstimulated stem cells in vivo. Further, in vitro assays confirmed higher secretion rates of proangiogenic as well as proinflammatoric factors in the presence of LPS-activated SDSC. Our results suggest that combining activated stem cells and a dermal substitute is a promising option to enhance vascularization in scaffold-mediated dermal regeneration.
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72890
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Martínez-Fernández M, Rubio C, Segovia C, López-Calderón FF, Dueñas M, Paramio JM. EZH2 in Bladder Cancer, a Promising Therapeutic Target. Int J Mol Sci 2015; 16:27107-32. [PMID: 26580594 DOI: 10.3390/ijms161126000] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Revised: 10/28/2015] [Accepted: 11/02/2015] [Indexed: 01/17/2023] Open
Abstract
Bladder Cancer (BC) represents a current clinical and social challenge. The recent studies aimed to describe the genomic landscape of BC have underscored the relevance of epigenetic alterations in the pathogenesis of these tumors. Among the epigenetic alterations, histone modifications occupied a central role not only in cancer, but also in normal organism homeostasis and development. EZH2 (Enhancer of Zeste Homolog 2) belongs to the Polycomb repressive complex 2 as its catalytic subunit, which through the trimethylation of H3 (Histone 3) on K27 (Lysine 27), produces gene silencing. EZH2 is frequently overexpressed in multiple tumor types, including BC, and plays multiple roles besides the well-recognized histone mark generation. In this review, we summarize the present knowledge on the oncogenic roles of EZH2 and its potential use as a therapeutic target, with special emphasis on BC pathogenesis and management.
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72891
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Wen J, Zhao Y, Guo L. Orexin A induces autophagy in HCT-116 human colon cancer cells through the ERK signaling pathway. Int J Mol Med 2015; 37:126-32. [PMID: 26572581 DOI: 10.3892/ijmm.2015.2409] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2015] [Accepted: 10/07/2015] [Indexed: 11/06/2022] Open
Abstract
Orexins are a class of peptides which have a potent influence on a broad variety of cancer cells. Autophagy is closely associated with tumors; however, its function is not yet completely understood. In this study, we aimed to determine whether orexin A induces autophagy in HCT‑116 human colon cancer cells and to elucidate the molecular mechanisms involved. For this purpose, HCT‑116 cells were treated with orexin A, and cell viability was then measured by MTT assay, and apoptosis was determined by flow cytometry. The expression levels of autophagy‑related proteins were measured by western blot analysis. Quantitative analysis of autophagy following acridine orange (AO) staining was performed using fluorescence microscopy, and cellular morphology was observed under a transmission electron microscope. In addition, the HCT‑116 cells were treated with the extracellular signal‑regulated kinase (ERK) inhibitor, U0126, or the autophagy inhibitor, chloroquine, in combination with orexin A in order to examine the activation of ERK. We found that orexin A significantly inhibited the viability of the HCT‑116 cells. Both autophagy and apoptosis were activated during the orexin A‑induced death of HCT‑116 cells. When the HCT‑116 cells were treated with orexin A for 24 h, an accumulation of punctate microtubule-associated protein-1 light chain 3 (LC3) and an increase in LC3‑Ⅱ protein levels were also detected, indicating the activation of autophagy. Moreover, orexin A upregulated ERK phosphorylation; however, U0126 or chloroquine abrogated ERK phosphorylation and decreased autophagy, compared to treatment with orexin A alone. Therefore, our findings demonstratedm that orexin A induced autophagy through the ERK pathway in HCT‑116 human colon cancer cells. The inhibition of autophagy may thus prove to be an effective strategy for enhancing the antitumor potential of orexin A as a treatment for colon cancer.
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Affiliation(s)
- Jing Wen
- Department of Endocrinology, First Affiliated Hospital, China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Yuyan Zhao
- Department of Endocrinology, First Affiliated Hospital, China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Lei Guo
- Department of Orthopedic Surgery, First Affiliated Hospital, China Medical University, Shenyang, Liaoning 110001, P.R. China
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Valley-Omar Z, Nindo F, Mudau M, Hsiao M, Martin DP. Phylogenetic Exploration of Nosocomial Transmission Chains of 2009 Influenza A/H1N1 among Children Admitted at Red Cross War Memorial Children's Hospital, Cape Town, South Africa in 2011. PLoS One 2015; 10:e0141744. [PMID: 26565994 PMCID: PMC4643913 DOI: 10.1371/journal.pone.0141744] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Accepted: 10/11/2015] [Indexed: 12/27/2022] Open
Abstract
Traditional modes of investigating influenza nosocomial transmission have entailed a combination of confirmatory molecular diagnostic testing and epidemiological investigation. Common hospital-acquired infections like influenza require a discerning ability to distinguish between viral isolates to accurately identify patient transmission chains. We assessed whether influenza hemagglutinin sequence phylogenies can be used to enrich epidemiological data when investigating the extent of nosocomial transmission over a four-month period within a paediatric Hospital in Cape Town South Africa. Possible transmission chains/channels were initially determined through basic patient admission data combined with Maximum likelihood and time-scaled Bayesian phylogenetic analyses. These analyses suggested that most instances of potential hospital-acquired infections resulted from multiple introductions of Influenza A into the hospital, which included instances where virus hemagglutinin sequences were identical between different patients. Furthermore, a general inability to establish epidemiological transmission linkage of patients/viral isolates implied that identified isolates could have originated from asymptomatic hospital patients, visitors or hospital staff. In contrast, a traditional epidemiological investigation that used no viral phylogenetic analyses, based on patient co-admission into specific wards during a particular time-frame, suggested that multiple hospital acquired infection instances may have stemmed from a limited number of identifiable index viral isolates/patients. This traditional epidemiological analysis by itself could incorrectly suggest linkage between unrelated cases, underestimate the number of unique infections and may overlook the possible diffuse nature of hospital transmission, which was suggested by sequencing data to be caused by multiple unique introductions of influenza A isolates into individual hospital wards. We have demonstrated a functional role for viral sequence data in nosocomial transmission investigation through its ability to enrich traditional, non-molecular observational epidemiological investigation by teasing out possible transmission pathways and working toward more accurately enumerating the number of possible transmission events.
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Affiliation(s)
- Ziyaad Valley-Omar
- Centre for Respiratory Diseases and Meningitis, Virology, National Institute for Communicable Diseases, Sandringham, Johannesburg, South Africa
- University of Cape Town, Faculty of Health Sciences, Department of Clinical Laboratory Sciences Medical Virology, Observatory, Cape Town, South Africa
- * E-mail:
| | - Fredrick Nindo
- University of Cape Town, Faculty of Health Sciences, Institute of Infectious Disease and Molecular Medicine, Computational Biology Group, Observatory, Cape Town, South Africa
| | - Maanda Mudau
- Centre for Tuberculosis, National Institute for Communicable Diseases, Sandringham, Johannesburg, South Africa
| | - Marvin Hsiao
- University of Cape Town, Faculty of Health Sciences, Department of Clinical Laboratory Sciences Medical Virology, Observatory, Cape Town, South Africa
- National Health Laboratory Service, Groote Schuur Complex, Department of Clinical Virology, Observatory, Cape Town, South Africa
| | - Darren Patrick Martin
- University of Cape Town, Faculty of Health Sciences, Institute of Infectious Disease and Molecular Medicine, Computational Biology Group, Observatory, Cape Town, South Africa
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72893
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Hodjat M, Rezvanfar MA, Abdollahi M. A systematic review on the role of environmental toxicants in stem cells aging. Food Chem Toxicol 2015; 86:298-308. [PMID: 26582272 DOI: 10.1016/j.fct.2015.11.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Revised: 10/29/2015] [Accepted: 11/02/2015] [Indexed: 12/19/2022]
Abstract
Stem cells are an important target for environmental toxicants. As they are the main source for replenishing of organs in the body, any changes in their normal function could affect the regenerative potential of organs, leading to the appearance of age-related disease and acceleration of the aging process. Environmental toxicants could exert their adverse effect on stem cell function via multiple cellular and molecular mechanisms, resulting in changes in the stem cell differentiation fate and cell transformation, and reduced self-renewal capacity, as well as induction of stress-induced cellular senescence. The present review focuses on the effect of environmental toxicants on stem cell function associated with the aging process. We categorized environmental toxicants according to their preferred molecular mechanism of action on stem cells, including changes in genomic, epigenomic, and proteomic levels and enhancing oxidative stress. Pesticides, tobacco smoke, radiation and heavy metals are well-studied toxicants that cause stem cell dysfunction via induction of oxidative stress. Transgenerational epigenetic changes are the most important effects of a variety of toxicants on germ cells and embryos that are heritable and could affect health in the next several generations. A better understanding of the underlying mechanisms of toxicant-induced stem cell aging will help us to develop therapeutic intervention strategies against environmental aging. Meanwhile, more efforts are required to find the direct in vivo relationship between adverse effect of environmental toxicants and stem cell aging, leading to organismal aging.
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Affiliation(s)
- Mahshid Hodjat
- Department of Toxicology and Pharmacology, Faculty of Pharmacy, and Pharmaceutical Sciences Research Center (PSRC), Endocrinology & Metabolism Research Center (EMRC), Toxicology & Poisoning Research Center (TPRC), Tehran University of Medical Sciences (TUMS), Tehran 1417614411, Iran
| | - Mohammad Amin Rezvanfar
- Department of Toxicology and Pharmacology, Faculty of Pharmacy, and Pharmaceutical Sciences Research Center (PSRC), Endocrinology & Metabolism Research Center (EMRC), Toxicology & Poisoning Research Center (TPRC), Tehran University of Medical Sciences (TUMS), Tehran 1417614411, Iran
| | - Mohammad Abdollahi
- Department of Toxicology and Pharmacology, Faculty of Pharmacy, and Pharmaceutical Sciences Research Center (PSRC), Endocrinology & Metabolism Research Center (EMRC), Toxicology & Poisoning Research Center (TPRC), Tehran University of Medical Sciences (TUMS), Tehran 1417614411, Iran.
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72894
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Wei H, Zhang J, Tan K, Sun R, Yin L, Pu Y. Benzene-Induced Aberrant miRNA Expression Profile in Hematopoietic Progenitor Cells in C57BL/6 Mice. Int J Mol Sci 2015; 16:27058-71. [PMID: 26569237 DOI: 10.3390/ijms161126001] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 10/29/2015] [Accepted: 11/02/2015] [Indexed: 12/24/2022] Open
Abstract
Benzene is a common environmental pollutant that causes hematological alterations. MicroRNAs (miRNAs) may play a role in benzene-induced hematotoxicity. In this study, C57BL/6 mice showed significant hematotoxicity after exposure to 150 mg/kg benzene for 4 weeks. Benzene exposure decreased not only the number of cells in peripheral blood but also hematopoietic progenitor cells in the bone marrow. Meanwhile, RNA from Lin− cells sorted from the bone marrow was applied to aberrant miRNA expression profile using Illumina sequencing. We found that 5 miRNAs were overexpressed and 45 miRNAs were downregulated in the benzene exposure group. Sequencing results were confirmed through qRT-PCR. Furthermore, we also identified five miRNAs which significantly altered in Lin−c-Kit+ cells obtained from benzene-exposed mice, including mmu-miR-34a-5p; mmu-miR-342-3p; mmu-miR-100-5p; mmu-miR-181a-5p; and mmu-miR-196b-5p. In summary, we successfully established a classical animal model to induce significant hematotoxicity by benzene injection. Benzene exposure may cause severe hematotoxicity not only to blood cells in peripheral circulation but also to hematopoietic cells in bone marrow. Benzene exposure also alters miRNA expression in hematopoietic progenitor cells. This study suggests that benzene induces alteration in hematopoiesis and hematopoiesis-associated miRNAs.
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72895
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Zhang XS. Strain Interactions as a Mechanism for Dominant Strain Alternation and Incidence Oscillation in Infectious Diseases: Seasonal Influenza as a Case Study. PLoS One 2015; 10:e0142170. [PMID: 26562668 PMCID: PMC4642928 DOI: 10.1371/journal.pone.0142170] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Accepted: 10/19/2015] [Indexed: 12/17/2022] Open
Abstract
Background Many human infectious diseases are caused by pathogens that have multiple strains and show oscillation in infection incidence and alternation of dominant strains which together are referred to as epidemic cycling. Understanding the underlying mechanisms of epidemic cycling is essential for forecasting outbreaks of epidemics and therefore important for public health planning. Current theoretical effort is mainly focused on the factors that are extrinsic to the pathogens themselves (“extrinsic factors”) such as environmental variation and seasonal change in human behaviours and susceptibility. Nevertheless, co-circulation of different strains of a pathogen was usually observed and thus strains interact with one another within concurrent infection and during sequential infection. The existence of these intrinsic factors is common and may be involved in the generation of epidemic cycling of multi-strain pathogens. Methods and Findings To explore the mechanisms that are intrinsic to the pathogens themselves (“intrinsic factors”) for epidemic cycling, we consider a multi-strain SIRS model including cross-immunity and infectivity enhancement and use seasonal influenza as an example to parameterize the model. The Kullback-Leibler information distance was calculated to measure the match between the model outputs and the typical features of seasonal flu (an outbreak duration of 11 weeks and an annual attack rate of 15%). Results show that interactions among strains can generate seasonal influenza with these characteristic features, provided that: the infectivity of a single strain within concurrent infection is enhanced 2−7 times that within a single infection; cross-immunity as a result of past infection is 0.5–0.8 and lasts 2–9 years; while other parameters are within their widely accepted ranges (such as a 2–3 day infectious period and the basic reproductive number of 1.8–3.0). Moreover, the observed alternation of the dominant strain among epidemics emerges naturally from the best fit model. Alternative modelling that also includes seasonal forcing in transmissibility shows that both external mechanisms (i.e. seasonal forcing) and the intrinsic mechanisms (i.e., strain interactions) are equally able to generate the observed time-series in seasonal flu. Conclusions The intrinsic mechanism of strain interactions alone can generate the observed patterns of seasonal flu epidemics, but according to Kullback-Leibler information distance the importance of extrinsic mechanisms cannot be excluded. The intrinsic mechanism illustrated here to explain seasonal flu may also apply to other infectious diseases caused by polymorphic pathogens.
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Affiliation(s)
- Xu-Sheng Zhang
- Modelling and Economics Unit, Department of Statistics, Modelling and Economics, Centre for Infectious Disease Surveillance and Control, Public Health England, London, United Kingdom
- Medical Research Council Centre for Outbreak Analysis and Modelling, Department of Infectious Disease Epidemiology, Imperial College School of Public Health, London, United Kingdom
- * E-mail:
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72896
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Tyleckova J, Valekova I, Zizkova M, Rakocyova M, Marsala S, Marsala M, Gadher SJ, Kovarova H. Surface N-glycoproteome patterns reveal key proteins of neuronal differentiation. J Proteomics 2015; 132:13-20. [PMID: 26581640 DOI: 10.1016/j.jprot.2015.11.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Revised: 09/03/2015] [Accepted: 11/09/2015] [Indexed: 01/23/2023]
Abstract
UNLABELLED Pluripotent stem cell-derived committed neural precursors are an important source of cells to treat neurodegenerative diseases including spinal cord injury. There remains an urgency to identify markers for monitoring of neural progenitor specificity, estimation of neural fate and follow-up correlation with therapeutic effect in preclinical studies using animal disease models. Cell surface capture technology was used to uncover the cell surface exposed N-glycoproteome of neural precursor cells upon neuronal differentiation as well as post-mitotic mature hNT neurons. The data presented depict an extensive study of surfaceome during neuronal differentiation, confirming glycosylation at a particular predicted site of many of the identified proteins. Quantitative changes detected in cell surface protein levels reveal a set of proteins that highlight the complexity of the neuronal differentiation process. Several of these proteins including the cell adhesion molecules ICAM1, CHL1, and astrotactin1 as well as LAMP1 were validated by SRM. Combination of immunofluorescence staining of ICAM1 and flow cytometry indicated a possible direction for future scrutiny of such proteins as targets for enrichment of the neuronal subpopulation from mixed cultures after differentiation of neural precursor cells. These surface proteins hold an important key for development of safe strategies in cell-replacement therapies of neuronal disorders. BIOLOGICAL SIGNIFICANCE Neural stem and/or precursor cells have a great potential for cell-replacement therapies of neuronal diseases. Availability of well characterised and expandable neural cell lineage specific populations is critical for addressing such a challenge. In our study we identified and relatively quantified several hundred surface N-glycoproteins in the course of neuronal differentiation. We further confirmed the abundant changes for several cell adhesion proteins by SRM and outlined a strategy for utilisation of such N-glycoproteins in antibody based cell sorting. The comprehensive dataset presented here demonstrates the molecular background of neuronal differentiation highly useful for development of new plasma membrane markers to identify and select neuronal subpopulation from mixed neural cell cultures.
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Affiliation(s)
- Jirina Tyleckova
- Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, Laboratory of Applied Proteome Analyses, Libechov, CZ 27721, Czech Republic; Research Center PIGMOD, Laboratory of Applied Proteome Analyses, Libechov, CZ 27721, Czech Republic
| | - Ivona Valekova
- Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, Laboratory of Applied Proteome Analyses, Libechov, CZ 27721, Czech Republic; Research Center PIGMOD, Laboratory of Applied Proteome Analyses, Libechov, CZ 27721, Czech Republic; Department of Cell Biology, Faculty of Science, Charles University, CZ 128 43 Prague, Czech Republic
| | - Martina Zizkova
- Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, Laboratory of Applied Proteome Analyses, Libechov, CZ 27721, Czech Republic; Research Center PIGMOD, Laboratory of Applied Proteome Analyses, Libechov, CZ 27721, Czech Republic; Department of Cell Biology, Faculty of Science, Charles University, CZ 128 43 Prague, Czech Republic
| | - Michaela Rakocyova
- Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, Laboratory of Applied Proteome Analyses, Libechov, CZ 27721, Czech Republic; Research Center PIGMOD, Laboratory of Applied Proteome Analyses, Libechov, CZ 27721, Czech Republic
| | - Silvia Marsala
- University of California, San Diego, Department of Anesthesiology, Neuroregeneration Laboratory, Sanford Consortium for Regenerative Medicine, La Jolla, CA-92037, USA
| | - Martin Marsala
- University of California, San Diego, Department of Anesthesiology, Neuroregeneration Laboratory, Sanford Consortium for Regenerative Medicine, La Jolla, CA-92037, USA
| | | | - Hana Kovarova
- Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, Laboratory of Applied Proteome Analyses, Libechov, CZ 27721, Czech Republic; Research Center PIGMOD, Laboratory of Applied Proteome Analyses, Libechov, CZ 27721, Czech Republic.
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72897
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Grootaert C, Kamiloglu S, Capanoglu E, Van Camp J. Cell Systems to Investigate the Impact of Polyphenols on Cardiovascular Health. Nutrients 2015; 7:9229-55. [PMID: 26569293 PMCID: PMC4663590 DOI: 10.3390/nu7115462] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [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: 09/21/2015] [Revised: 10/21/2015] [Accepted: 10/28/2015] [Indexed: 02/07/2023] Open
Abstract
Polyphenols are a diverse group of micronutrients from plant origin that may serve as antioxidants and that contribute to human health in general. More specifically, many research groups have investigated their protective effect against cardiovascular diseases in several animal studies and human trials. Yet, because of the excessive processing of the polyphenol structure by human cells and the residing intestinal microbial community, which results in a large variability between the test subjects, the exact mechanisms of their protective effects are still under investigation. To this end, simplified cell culture systems have been used to decrease the inter-individual variability in mechanistic studies. In this review, we will discuss the different cell culture models that have been used so far for polyphenol research in the context of cardiovascular diseases. We will also review the current trends in cell culture research, including co-culture methodologies. Finally, we will discuss the potential of these advanced models to screen for cardiovascular effects of the large pool of bioactive polyphenols present in foods and their metabolites.
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Affiliation(s)
- Charlotte Grootaert
- Laboratory of Food Chemistry and Human Nutrition, Department of Food Safety and Food Quality, Faculty of Bioscience Engineering, Ghent University, Coupure Links, Ghent 653 B-9000, Belgium.
| | - Senem Kamiloglu
- Laboratory of Food Chemistry and Human Nutrition, Department of Food Safety and Food Quality, Faculty of Bioscience Engineering, Ghent University, Coupure Links, Ghent 653 B-9000, Belgium.
- Department of Food Engineering, Faculty of Chemical and Metallurgical Engineering, Istanbul Technical University, Maslak 34469, Istanbul, Turkey.
| | - Esra Capanoglu
- Department of Food Engineering, Faculty of Chemical and Metallurgical Engineering, Istanbul Technical University, Maslak 34469, Istanbul, Turkey.
| | - John Van Camp
- Laboratory of Food Chemistry and Human Nutrition, Department of Food Safety and Food Quality, Faculty of Bioscience Engineering, Ghent University, Coupure Links, Ghent 653 B-9000, Belgium.
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72898
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Zhang Q, Lv X, Wu T, Ma Q, Teng A, Zhang Y, Zhang M. Composition of Lycium barbarum polysaccharides and their apoptosis-inducing effect on human hepatoma SMMC-7721 cells. Food Nutr Res 2015; 59:28696. [PMID: 26563650 PMCID: PMC4643179 DOI: 10.3402/fnr.v59.28696] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 10/10/2015] [Accepted: 10/15/2015] [Indexed: 01/04/2023] Open
Abstract
Background Lycium barbarum polysaccharide (LBP) is a natural functional component that has a variety of biological activities. The molecular structures and apoptosis-inducing activities on human hepatoma SMMC-7721 cells of two LBP fractions, LBP-d and LBP-e, were investigated. Results The results showed that LBP-d and LBP-e both consist of protein, uronic acid, and neutral sugars in different proportions. The structure of LBP was characterized by gas chromatography, periodate oxidation, and Smith degradation. LBP-d was composed of eight kinds of monosaccharides (fucose, ribose, rhamnose, arabinose, xylose, mannose, galactose, and glucose), while LBP-e was composed of six kinds of monosaccharides (fucose, rhamnose, arabinose, mannose, galactose, and glucose). LBP-d and LBP-e blocked SMMC-7721 cells at the G0/G1 and S phases with an inhibition ratio of 26.70 and 45.13%, respectively, and enhanced the concentration of Ca2+ in the cytoplasm of SMMC-7721. Conclusion The contents of protein, uronic acid, and galactose in LBP-e were much higher than those in LBP-d, which might responsible for their different bioactivities. The results showed that LBP can be provided as a potential chemotherapeutic agent drug to treat cancer.
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Affiliation(s)
- Qian Zhang
- Key Laboratory of Food Nutrition and Safety (Tianjin University of Science and Technology), Ministry of Education, Tianjin, China.,Department of Biological and Food Engineering, Tianshi College, Tianjin, China
| | - Xiaoling Lv
- Key Laboratory of Food Nutrition and Safety (Tianjin University of Science and Technology), Ministry of Education, Tianjin, China
| | - Tao Wu
- Key Laboratory of Food Nutrition and Safety (Tianjin University of Science and Technology), Ministry of Education, Tianjin, China
| | - Qian Ma
- Key Laboratory of Food Nutrition and Safety (Tianjin University of Science and Technology), Ministry of Education, Tianjin, China
| | - Anguo Teng
- Key Laboratory of Food Nutrition and Safety (Tianjin University of Science and Technology), Ministry of Education, Tianjin, China
| | - Ying Zhang
- Key Laboratory of Food Nutrition and Safety (Tianjin University of Science and Technology), Ministry of Education, Tianjin, China
| | - Min Zhang
- Key Laboratory of Food Nutrition and Safety (Tianjin University of Science and Technology), Ministry of Education, Tianjin, China;
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72899
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Qu Y, Pan S, Kang M, Dong R, Zhao J. MicroRNA-150 functions as a tumor suppressor in osteosarcoma by targeting IGF2BP1. Tumour Biol 2015; 37:5275-84. [PMID: 26561465 DOI: 10.1007/s13277-015-4389-8] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Accepted: 11/04/2015] [Indexed: 02/07/2023] Open
Abstract
Osteosarcoma (OS) is the most common primary malignant bone tumor with high morbidity in young adults and adolescents. Increasing evidence has demonstrated that aberrant microRNA (miRNA) expression is involved in OS occurrence and development. miR-150 has been recently widely studied in many cancers, but not including OS. This study is aimed to investigate the expression and biological role of miR-150 in OS. Here, we found that miR-150 expression was consistently downregulated in OS tissues and cell lines compared with the matched adjacent normal tissues and human normal osteoblast cells (NHOst), and its expression was significantly correlated with lymph node metastasis and tumor-node-metastasis (TNM) stage. Functional study showed that restoration of miR-150 expression in OS cells could inhibit cell proliferation, migration, and invasion and induced apoptosis in vitro as well as suppressed tumor growth of OS in vivo. Mechanistically, IGF2 mRNA-binding protein 1(IGF2BP1) was confirmed to act as a direct target of miR-150, and the IGF2BP1 mRNA expression was inversely correlated with the level of miR-150 in OS tissues. In addition, downregulation of endogenous IGF2BP1 exhibited similar effects of overexpression of miR-150. Taken together, these findings suggest that miR-150 functions as a tumor suppressor in OS partially by targeting IGF2BP1.
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Affiliation(s)
- Yang Qu
- Department of Orthopedics, the Second Hospital of Jilin University, 218 Ziqiang Street, Nanguan District, Changchun, 130042, China
| | - Su Pan
- Department of Orthopedics, the Second Hospital of Jilin University, 218 Ziqiang Street, Nanguan District, Changchun, 130042, China
| | - Mingyang Kang
- Department of Orthopedics, the Second Hospital of Jilin University, 218 Ziqiang Street, Nanguan District, Changchun, 130042, China
| | - Rongpeng Dong
- Department of Orthopedics, the Second Hospital of Jilin University, 218 Ziqiang Street, Nanguan District, Changchun, 130042, China
| | - Jianwu Zhao
- Department of Orthopedics, the Second Hospital of Jilin University, 218 Ziqiang Street, Nanguan District, Changchun, 130042, China.
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Spratt DE, Beadle BM, Zumsteg ZS, Rivera A, Skinner HD, Osborne JR, Garden AS, Lee NY. The Influence of Diabetes Mellitus and Metformin on Distant Metastases in Oropharyngeal Cancer: A Multicenter Study. Int J Radiat Oncol Biol Phys 2016; 94:523-31. [PMID: 26867881 DOI: 10.1016/j.ijrobp.2015.11.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Revised: 09/09/2015] [Accepted: 11/04/2015] [Indexed: 01/13/2023]
Abstract
PURPOSE Local control in oropharyngeal cancer has improved to unprecedented rates with combined modality therapy; as a result, distant metastases are becoming a principal challenge. We aimed to determine the impact of diabetes mellitus and metformin use on clinical outcomes in a large population of oropharyngeal cancer patients treated in the modern era. METHODS AND MATERIALS We identified 1745 consecutive patients with oropharyngeal cancer treated at 2 large cancer centers with external beam radiation therapy from 1998 to 2011. A total of 184 patients had diabetes mellitus at the time of diagnosis, of whom 102 were taking metformin. The outcomes assessed included local failure-free survival (LFFS), regional failure-free survival (RFFS), distant metastasis-free survival (DMFS), and overall survival (OS). RESULTS The median follow-up time was 4.3 years. The 5-year actuarial rates of DMFS were 89.6% for nondiabetic patients and 78.7% for diabetic nonmetformin users (P=.011) and of OS were 83.0% for nondiabetic patients and 70.7% for diabetic nonmetformin users (P=.048). Diabetic metformin users had 5-year DMFS (90.1%) and OS (89.6%) similar to those of nondiabetic patients. Multivariate analysis (diabetic nonmetformin users as reference) demonstrated improved DMFS for nondiabetic patients (adjusted hazard ratio 0.54; 95% confidence interval 0.32-0.93; P=.03) and a trend toward improved DMFS with metformin use (adjusted hazard ratio 0.46; 95% confidence interval 0.20-1.04; P=.06). LFFS and RFFS were high in all groups and were not significantly different by diabetic status or metformin use. CONCLUSIONS Diabetic patients not using metformin independently have significantly higher rates of distant metastases than do nondiabetic patients, whereas metformin users have rates of distant metastases similar to those of nondiabetic patients. Further prospective investigation is warranted to validate the benefit of metformin in oropharyngeal cancer.
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