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Lloyd EG, Henríquez JA, Biffi G. Modelling the micro- and macro- environment of pancreatic cancer: from patients to pre-clinical models and back. Dis Model Mech 2024; 17:dmm050624. [PMID: 38639944 PMCID: PMC11051978 DOI: 10.1242/dmm.050624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2024] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is a lethal malignancy with very low survival rates. Over the past 50 years, improvements in PDAC survival have significantly lagged behind the progress made in other cancers. PDAC's dismal prognosis is due to typical late-stage diagnosis combined with lack of effective treatments and complex mechanisms of disease. We propose that improvements in survival are partly hindered by the current focus on largely modelling and targeting PDAC as one disease, despite it being heterogeneous. Implementing new disease-representative pre-clinical mouse models that capture this complexity could enable the development of transformative therapies. Specifically, these models should recapitulate human PDAC late-stage biology, heterogeneous genetics, extensive non-malignant stroma, and associated risk factors and comorbidities. In this Perspective, we focus on how pre-clinical mouse models could be improved to exemplify key features of PDAC micro- and macro- environments, which would drive clinically relevant patient stratification, tailored treatments and improved survival.
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Affiliation(s)
- Eloise G. Lloyd
- University of Cambridge, Cancer Research UK Cambridge Institute, Robinson Way, Cambridge CB2 0RE, UK
| | - Joaquín Araos Henríquez
- University of Cambridge, Cancer Research UK Cambridge Institute, Robinson Way, Cambridge CB2 0RE, UK
| | - Giulia Biffi
- University of Cambridge, Cancer Research UK Cambridge Institute, Robinson Way, Cambridge CB2 0RE, UK
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Baudouin R, Hans S. Clinical and HPV correlation in laryngeal papilloma: A locally advanced immune disease. Am J Otolaryngol 2024; 45:104083. [PMID: 37832333 DOI: 10.1016/j.amjoto.2023.104083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 07/04/2023] [Indexed: 10/15/2023]
Affiliation(s)
- Robin Baudouin
- Department of Otolaryngology-Head & Neck Surgery, Foch Hospital, School of Medicine, UFR Simone Veil, Université Versailles Saint-Quentin-en-Yvelines (Paris Saclay University), Paris, France.
| | - Stéphane Hans
- Department of Otolaryngology-Head & Neck Surgery, Foch Hospital, School of Medicine, UFR Simone Veil, Université Versailles Saint-Quentin-en-Yvelines (Paris Saclay University), Paris, France
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De Vlieghere E, Van de Vijver K, Blondeel E, Carpentier N, Ghobeira R, Pauwels J, Riemann S, Minsart M, Fieuws C, Mestach J, Baeyens A, De Geyter N, Debbaut C, Denys H, Descamps B, Claes K, Vral A, Van Dorpe J, Gevaert K, De Geest BG, Ceelen W, Van Vlierberghe S, De Wever O. A preclinical platform for assessing long-term drug efficacy exploiting mechanically tunable scaffolds colonized by a three-dimensional tumor microenvironment. Biomater Res 2023; 27:104. [PMID: 37853495 PMCID: PMC10583378 DOI: 10.1186/s40824-023-00441-3] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Accepted: 09/25/2023] [Indexed: 10/20/2023] Open
Abstract
BACKGROUND Long-term drug evaluation heavily relies upon rodent models. Drug discovery methods to reduce animal models in oncology may include three-dimensional (3D) cellular systems that take into account tumor microenvironment (TME) cell types and biomechanical properties. METHODS In this study we reconstructed a 3D tumor using an elastic polymer (acrylate-endcapped urethane-based poly(ethylene glycol) (AUPPEG)) with clinical relevant stiffness. Single cell suspensions from low-grade serous ovarian cancer (LGSOC) patient-derived early passage cultures of cancer cells and cancer-associated fibroblasts (CAF) embedded in a collagen gel were introduced to the AUPPEG scaffold. After self-organization in to a 3D tumor, this model was evaluated by a long-term (> 40 days) exposure to a drug combination of MEK and HSP90 inhibitors. The drug-response results from this long-term in vitro model are compared with drug responses in an orthotopic LGSOC xenograft mouse model. RESULTS The in vitro 3D scaffold LGSOC model mimics the growth ratio and spatial organization of the LGSOC. The AUPPEG scaffold approach allows to test new targeted treatments and monitor long-term drug responses. The results correlate with those of the orthotopic LGSOC xenograft mouse model. CONCLUSIONS The mechanically-tunable scaffolds colonized by a three-dimensional LGSOC allow long-term drug evaluation and can be considered as a valid alternative to reduce, replace and refine animal models in drug discovery.
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Affiliation(s)
- Elly De Vlieghere
- Department of Human Structure and Repair, Laboratory of Experimental Cancer Research, Ghent University, Ghent, Belgium
- Polymer Chemistry and Biomaterials Group, Centre of Macromolecular Chemistry, Ghent University, Ghent, Belgium
- Cancer Research Institute Ghent (CRIG), Ghent University, Ghent, Belgium
| | - Koen Van de Vijver
- Cancer Research Institute Ghent (CRIG), Ghent University, Ghent, Belgium
- Department of Diagnostic Sciences, Ghent University Hospital, Ghent, Belgium
| | - Eva Blondeel
- Department of Human Structure and Repair, Laboratory of Experimental Cancer Research, Ghent University, Ghent, Belgium
- Cancer Research Institute Ghent (CRIG), Ghent University, Ghent, Belgium
| | - Nathan Carpentier
- Polymer Chemistry and Biomaterials Group, Centre of Macromolecular Chemistry, Ghent University, Ghent, Belgium
- Cancer Research Institute Ghent (CRIG), Ghent University, Ghent, Belgium
| | - Rouba Ghobeira
- Department of Applied Physics, Research Unit Plasma Technology (RUPT), Ghent University, Ghent, Belgium
| | - Jarne Pauwels
- Cancer Research Institute Ghent (CRIG), Ghent University, Ghent, Belgium
- Department of Biomolecular Medicine, VIB Center for Medical Biotechnology, Ghent University, Ghent, Belgium
| | - Sebastian Riemann
- Department of Human Structure and Repair, Laboratory of Experimental Cancer Research, Ghent University, Ghent, Belgium
| | - Manon Minsart
- Polymer Chemistry and Biomaterials Group, Centre of Macromolecular Chemistry, Ghent University, Ghent, Belgium
| | - Charlotte Fieuws
- Cancer Research Institute Ghent (CRIG), Ghent University, Ghent, Belgium
- Department of Biomolecular Medicine, Center for Medical Genetics, Ghent University, Ghent, Belgium
| | - Johanna Mestach
- Department of Human Structure and Repair, Laboratory of Experimental Cancer Research, Ghent University, Ghent, Belgium
- Cancer Research Institute Ghent (CRIG), Ghent University, Ghent, Belgium
| | - Ans Baeyens
- Cancer Research Institute Ghent (CRIG), Ghent University, Ghent, Belgium
- Department of Human Structure and Repair, Radiobiology Group, Ghent University, Ghent, Belgium
| | - Nathalie De Geyter
- Department of Applied Physics, Research Unit Plasma Technology (RUPT), Ghent University, Ghent, Belgium
| | - Charlotte Debbaut
- Cancer Research Institute Ghent (CRIG), Ghent University, Ghent, Belgium
- Department of Electronics and Information Systems, IBiTech-Biommeda, Ghent University, Ghent, Belgium
| | - Hannelore Denys
- Cancer Research Institute Ghent (CRIG), Ghent University, Ghent, Belgium
- Department of Medical Oncology, Ghent University Hospital, Ghent, Belgium
| | - Benedicte Descamps
- Cancer Research Institute Ghent (CRIG), Ghent University, Ghent, Belgium
- Department of Electronics and Information Systems, IbiTech-Medisip, Ghent University, Ghent, Belgium
| | - Kathleen Claes
- Department of Biomolecular Medicine, Center for Medical Genetics, Ghent University, Ghent, Belgium
| | - Anne Vral
- Cancer Research Institute Ghent (CRIG), Ghent University, Ghent, Belgium
- Department of Human Structure and Repair, Radiobiology Group, Ghent University, Ghent, Belgium
| | - Jo Van Dorpe
- Cancer Research Institute Ghent (CRIG), Ghent University, Ghent, Belgium
- Department of Diagnostic Sciences, Ghent University Hospital, Ghent, Belgium
| | - Kris Gevaert
- Cancer Research Institute Ghent (CRIG), Ghent University, Ghent, Belgium
- Department of Biomolecular Medicine, VIB Center for Medical Biotechnology, Ghent University, Ghent, Belgium
| | - Bruno G De Geest
- Cancer Research Institute Ghent (CRIG), Ghent University, Ghent, Belgium
- Department of Pharmaceutics, Ghent University, Ghent, Belgium
| | - Wim Ceelen
- Cancer Research Institute Ghent (CRIG), Ghent University, Ghent, Belgium
- Department of Human Structure and Repair, Experimental Surgery Lab, Ghent University, Ghent, Belgium
| | - Sandra Van Vlierberghe
- Polymer Chemistry and Biomaterials Group, Centre of Macromolecular Chemistry, Ghent University, Ghent, Belgium
- Cancer Research Institute Ghent (CRIG), Ghent University, Ghent, Belgium
| | - Olivier De Wever
- Department of Human Structure and Repair, Laboratory of Experimental Cancer Research, Ghent University, Ghent, Belgium.
- Cancer Research Institute Ghent (CRIG), Ghent University, Ghent, Belgium.
- Department of Pharmaceutics, Ghent University, Ghent, Belgium.
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Rivera Olsson S, Elldér E. Are bicycle streets cyclist-friendly? Micro-environmental factors for improving perceived safety when cycling in mixed traffic. Accid Anal Prev 2023; 184:107007. [PMID: 36806076 DOI: 10.1016/j.aap.2023.107007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 01/17/2023] [Accepted: 02/10/2023] [Indexed: 06/18/2023]
Abstract
A bicycle street is a mixed traffic street where motor vehicles are forced to adapt their speed to bicycle traffic, for example by encouraging cycling in the middle of the street using centered bicycle lanes. The objective safety of cyclists increases with lower vehicle speeds and fewer motor vehicles. Despite this, cyclists' perception of their safety is often reduced in mixed traffic streets. Subjective unsafety and risk constitute a major barrier to increased cycling. This study investigates how the design of the micro-environment of bicycle streets can improve cyclists' perceived safety in mixed traffic. A quasi-experimental survey in which 371 participants rated their perceived safety in photo-manipulated bicycle streets was conducted. 52% of the participants were male, the mean age was 43 (20-77) years, and 76% reported that they cycle 4-5 days a week or more. The focus was on evaluating micro-environmental factors such as different designs of centered bicycle lanes, road markings, signs, traffic volume, and parked cars. It is concluded that the micro-environment has important effects on the perceived safety of cyclists. Important gains in subjective safety can be achieved with fairly simple design efforts. Many participants felt safe when there were clearly demarcated red-colored bicycle lanes in the center of the street accompanied by road markings for cyclists. The strongest effect, however, comes from reducing traffic volume. Most participants felt safe in micro-environments in which the traffic volume had been reduced, including those where no design changes had been made. Important differences between different groups of cyclists were also found.
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Affiliation(s)
- Sara Rivera Olsson
- Department of Economy and Society, University of Gothenburg, Sweden; Department of Earth Sciences, University of Gothenburg, Sweden
| | - Erik Elldér
- Department of Economy and Society, University of Gothenburg, Sweden.
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Lane KJ, Levy JI, Patton AP, Durant JL, Zamore W, Brugge D. Relationship between traffic-related air pollution and inflammation biomarkers using structural equation modeling. Sci Total Environ 2023; 870:161874. [PMID: 36716891 PMCID: PMC11044987 DOI: 10.1016/j.scitotenv.2023.161874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 01/06/2023] [Accepted: 01/24/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND Evidence suggests that exposure to traffic-related air pollution (TRAP) and social stressors can increase inflammation. Given that there are many different markers of TRAP exposure, socio-economic status (SES), and inflammation, analytical approaches can leverage multiple markers to better elucidate associations. In this study, we applied structural equation modeling (SEM) to assess the association between a TRAP construct and a SES construct with an inflammation construct. METHODS This analysis was conducted as part of the Community Assessment of Freeway Exposure and Health (CAFEH; N = 408) study. Air pollution was characterized using a spatiotemporal model of particle number concentration (PNC) combined with individual participant time-activity adjustment (TAA). TAA-PNC and proximity to highways were considered for a construct of TRAP exposure. Participant demographics on education and income for an SES construct were assessed via questionnaires. Blood samples were analyzed for high sensitivity C-reactive protein (hsCRP), interleukin-6 (IL-6), and tumor necrosis factor-α receptor II (TNFRII), which were considered for the construct for inflammation. We conducted SEM and compared our findings with those obtained using generalized linear models (GLM). RESULTS Using GLM, TAA-PNC was associated with multiple inflammation biomarkers. An IQR (10,000 particles/cm3) increase of TAA-PNC was associated with a 14 % increase in hsCRP in the GLM. Using SEM, the association between the TRAP construct and the inflammation construct was twice as large as the associations with any individual inflammation biomarker. SES had an inverse association with inflammation in all models. Using SEM to estimate the indirect effects of SES on inflammation through the TRAP construct strengthened confidence in the association of TRAP with inflammation. CONCLUSION Our TRAP construct resulted in stronger associations with a combined construct for inflammation than with individual biomarkers, reinforcing the value of statistical approaches that combine multiple, related exposures or outcomes. Our findings are consistent with inflammatory risk from TRAP exposure.
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Affiliation(s)
- Kevin J Lane
- Department of Environmental Health, Boston University School of Public Health, Boston, MA, United States of America.
| | - Jonathan I Levy
- Department of Environmental Health, Boston University School of Public Health, Boston, MA, United States of America.
| | | | - John L Durant
- Department of Civil and Environmental Engineering, Tufts University, Medford, MA, United States of America.
| | - Wig Zamore
- Somerville Transportation Equity Partnership, Somerville, MA, United States of America
| | - Doug Brugge
- Department of Public Health Sciences, University of Connecticut School of Medicine, Farmington, CT, United States of America.
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Russell HS, Kappelt N, Fessa D, Frederickson LB, Bagkis E, Apostolidis P, Karatzas K, Schmidt JA, Hertel O, Johnson MS. Particulate air pollution in the Copenhagen metro part 2: Low-cost sensors and micro-environment classification. Environ Int 2022; 170:107645. [PMID: 36434885 DOI: 10.1016/j.envint.2022.107645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2022] [Revised: 10/12/2022] [Accepted: 11/16/2022] [Indexed: 06/16/2023]
Abstract
In this study fine particulate matter (PM2.5) levels throughout the Copenhagen metro system are measured for the first time and found to be ∼10 times the roadside levels in Copenhagen. In this Part 2 article, low-cost sensor (LCS) nodes designed for personal-exposure monitoring are tested against a conventional mid-range device (TSI DustTrak), and gravimetric methods. The nodes were found to be effective for personal exposure measurements inside the metro system, with R2 values of > 0.8 at 1-min and > 0.9 at 5-min time-resolution, with an average slope of 1.01 in both cases, in comparison to the reference, which is impressive for this dynamic environment. Micro-environment (ME) classification techniques are also developed and tested, involving the use of auxiliary sensors, measuring light, carbon dioxide, humidity, temperature and motion. The output from these sensors is used to distinguish between specific MEs, namely, being aboard trains travelling above- or under- ground, with 83 % accuracy, and determining whether sensors were aboard a train or stationary at a platform with 92 % accuracy. This information was used to show a 143 % increase in mean PM2.5 concentration for underground sections relative to overground, and 22 % increase for train vs. platform measurements. The ME classification method can also be used to improve calibration models, assist in accurate exposure assessment based on detailed time-activity patterns, and facilitate field studies that do not require personnel to record time-activity diaries.
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Affiliation(s)
- Hugo S Russell
- Department of Environmental Science, Aarhus University, DK-4000 Roskilde, Denmark; AirLabs, Nannasgade 28, DK-2200 Copenhagen N, Denmark; Danish Big Data Centre for Environment and Health (BERTHA), Aarhus University, DK-4000 Roskilde, Denmark
| | - Niklas Kappelt
- AirLabs, Nannasgade 28, DK-2200 Copenhagen N, Denmark; Department of Chemistry, Copenhagen University, DK-2100 Copenhagen, Denmark
| | - Dafni Fessa
- Department of Environmental Science, Aarhus University, DK-4000 Roskilde, Denmark
| | - Louise B Frederickson
- Department of Environmental Science, Aarhus University, DK-4000 Roskilde, Denmark; AirLabs, Nannasgade 28, DK-2200 Copenhagen N, Denmark; Danish Big Data Centre for Environment and Health (BERTHA), Aarhus University, DK-4000 Roskilde, Denmark
| | - Evangelos Bagkis
- Environmental Informatics Research Group, School of Mechanical Engineering, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece
| | - Pantelis Apostolidis
- Environmental Informatics Research Group, School of Mechanical Engineering, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece
| | - Kostas Karatzas
- Environmental Informatics Research Group, School of Mechanical Engineering, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece
| | | | - Ole Hertel
- Danish Big Data Centre for Environment and Health (BERTHA), Aarhus University, DK-4000 Roskilde, Denmark; Department of Ecoscience, Aarhus University, DK-4000 Roskilde, Denmark
| | - Matthew S Johnson
- AirLabs, Nannasgade 28, DK-2200 Copenhagen N, Denmark; Department of Chemistry, Copenhagen University, DK-2100 Copenhagen, Denmark.
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Hong Y, Tu Q, Cheng H, Huangfu X, Chen Z, He Q. Chronic high-dose silver nanoparticle exposure stimulates N 2O emissions by constructing anaerobic micro-environment. Water Res 2022; 225:119104. [PMID: 36155009 DOI: 10.1016/j.watres.2022.119104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 09/05/2022] [Accepted: 09/10/2022] [Indexed: 06/16/2023]
Abstract
Silver nanoparticles (Ag-NPs) were found to be responsible for nitrous oxide (N2O) generation; however, the mechanism of Ag-NP induced N2O production remains controversial and needs to be elucidated. In this study, chronic Ag-NP exposure experiments were conducted in five independent sequencing batch biofilm reactors to systematically assess the effects of Ag-NPs on N2O emission. The results indicated that a low dose of Ag-NPs (< 1 mg/L) slightly suppressed N2O generation by less than 22.99% compared with the no-Ag-NP control method. In contrast, a high dose (5 mg/L) of Ag-NPs stimulated N2O emission by 67.54%. ICP-MS and SEM-EDS together revealed that high Ag-NP content accumulated on the biofilm surface when exposed to 5 mg/L Ag-NPs. N2O and DO microelectrodes, as well as N2O isotopic composition analyses, further demonstrated that the accumulated Ag-NPs construct the anaerobic zone in the biofilm, which is the primary factor for the stimulation of the nitrite reduction pathway to release N2O. A metagenomic analysis further attributed the higher N2O emissions under exposure to a high dose of Ag-NPs to the higher relative abundance of narB and nirK genes (i.e. 1.52- and 1.29-fold higher, respectively). These findings collectively suggest that chronic exposure to high doses of Ag-NPs could enhance N2O emissions by forming anaerobic micro-environments in biofilms.
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Affiliation(s)
- Yiyihui Hong
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing 400044, China
| | - Qianqian Tu
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing 400044, China; China TieGong Investment & Construction Group Co., Ltd, Beijing 101300, China
| | - Hong Cheng
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing 400044, China.
| | - Xiaoliu Huangfu
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing 400044, China
| | - Ziwei Chen
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing 400044, China
| | - Qiang He
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing 400044, China
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Chen YQ, Hu WH, Dong ZC, Dong SW. Multi-functional osteoclasts in matrix-based tissue engineering bone. Chin J Traumatol 2022; 25:132-137. [PMID: 34969539 PMCID: PMC9125721 DOI: 10.1016/j.cjtee.2021.11.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Revised: 09/30/2021] [Accepted: 11/05/2021] [Indexed: 02/04/2023] Open
Abstract
The repair of bone defects, especially for the large segment of bone defects, has always been an urgent problem in orthopedic clinic and attracted researchers' attention. Nowadays, the application of tissue engineering bone in the repair of bone defects has become the research hotspot. With the rapid development of tissue engineering, the novel and functional scaffold materials for bone repair have emerged. In this review, we have summarized the multi-functional roles of osteoclasts in bone remodeling. The development of matrix-based tissue engineering bone has laid a theoretical foundation for further investigation about the novel bone regeneration materials which could perform high bioactivity. From the point of view on preserving pre-osteoclasts and targeting mature osteoclasts, this review introduced the novel matrix-based tissue engineering bone based on osteoclasts in the field of bone tissue engineering, which provides a potential direction for the development of novel scaffold materials for the treatment of bone defects.
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Affiliation(s)
- Yue-Qi Chen
- Department of Orthopedics, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Wen-Hui Hu
- Department of Biomedical Materials Science, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Zi-Cai Dong
- Department of Biomedical Materials Science, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Shi-Wu Dong
- Department of Orthopedics, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China,Department of Biomedical Materials Science, Third Military Medical University (Army Medical University), Chongqing, 400038, China,State Key Laboratory of Trauma, Burns and Combined Injury, Third Military Medical University (Army Medical University), Chongqing, 400038, China,Corresponding author. Department of Orthopedics, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China.
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Chen S, Carver A, Sugiyama T, Knöll M. Built-environment attributes associated with refugee children's physical activity: a narrative review and research agenda. Confl Health 2021; 15:55. [PMID: 34238317 PMCID: PMC8268613 DOI: 10.1186/s13031-021-00393-2] [Citation(s) in RCA: 1] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 06/28/2021] [Indexed: 11/13/2022] Open
Abstract
Research has identified built environmental attributes associated with children’s physical activity (PA); however, less is known for environmental correlates of refugee children’s PA. This narrative review summarised the current evidence of associations between built environment attributes and refugee children’s PA. Six databases were searched with three sets of terms related to exposure (built environment); outcome (PA); and target population (refugee children aged 6–12 years). Eight studies (one quantitative; seven qualitative) met the inclusion criteria. Key PA barriers were limited play space and lack of neighbourhood safety. Design of refugee facilities and surrounding environments should provide better access to formal, informal and safe spaces for children’s play.
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Affiliation(s)
- Siqi Chen
- Urban Health Games Research Group (UHGs), Department of Architecture, Technische Universität Darmstadt, Darmstadt, Germany.
| | - Alison Carver
- Mary Mackillop Institute for Health Research, Australian Catholic University, Melbourne, Australia
| | - Takemi Sugiyama
- Centre for Urban Transitions, Swinburne University of Technology, Melbourne, Australia
| | - Martin Knöll
- Urban Health Games Research Group (UHGs), Department of Architecture, Technische Universität Darmstadt, Darmstadt, Germany
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Nepal C, Zhu B, O’Rourke CJ, Bhatt DK, Lee D, Song L, Wang D, Van Dyke A, Choo-Wosoba H, Liu Z, Hildesheim A, Goldstein AM, Dean M, LaFuente-Barquero J, Lawrence S, Mutreja K, Olanich ME, Bermejo JL, Ferreccio C, Roa JC, Rashid A, Hsing AW, Gao YT, Chanock SJ, Araya JC, Andersen JB, Koshiol J. Integrative molecular characterisation of gallbladder cancer reveals micro-environment-associated subtypes. J Hepatol 2021; 74:1132-1144. [PMID: 33276026 PMCID: PMC8058239 DOI: 10.1016/j.jhep.2020.11.033] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 10/21/2020] [Accepted: 11/16/2020] [Indexed: 02/08/2023]
Abstract
BACKGROUND & AIMS Gallbladder cancer (GBC) is the most common type of biliary tract cancer, but the molecular mechanisms involved in gallbladder carcinogenesis remain poorly understood. In this study, we applied integrative genomics approaches to characterise GBC and explore molecular subtypes associated with patient survival. METHODS We profiled the mutational landscape of GBC tumours (whole-exome sequencing on 92, targeted sequencing on 98, in total 190 patients). In a subset (n = 45), we interrogated the matched transcriptomes, DNA methylomes, and somatic copy number alterations. We explored molecular subtypes identified through clustering tumours by genes whose expression was associated with survival in 47 tumours and validated subtypes on 34 publicly available GBC cases. RESULTS Exome analysis revealed TP53 was the most mutated gene. The overall mutation rate was low (median 0.82 Mut/Mb). APOBEC-mediated mutational signatures were more common in tumours with higher mutational burden. Aflatoxin-related signatures tended to be highly clonal (present in ≥50% of cancer cells). Transcriptome-wide survival association analysis revealed a 95-gene signature that stratified all GBC patients into 3 subtypes that suggested an association with overall survival post-resection. The 2 poor-survival subtypes were associated with adverse clinicopathologic features (advanced stage, pN1, pM1), immunosuppressive micro-environments (myeloid-derived suppressor cell accumulation, extensive desmoplasia, hypoxia) and T cell dysfunction, whereas the good-survival subtype showed the opposite features. CONCLUSION These data suggest that the tumour micro-environment and immune profiles could play an important role in gallbladder carcinogenesis and should be evaluated in future clinical studies, along with mutational profiles. LAY SUMMARY Gallbladder cancer is highly fatal, and its causes are poorly understood. We evaluated gallbladder tumours to see if there were differences between tumours in genetic information such as DNA and RNA. We found evidence of aflatoxin exposure in these tumours, and immune cells surrounding the tumours were associated with survival.
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Affiliation(s)
- Chirag Nepal
- Biotech Research and Innovation Centre, Department of Health and Medical Sciences, University of Copenhagen, Denmark
| | - Bin Zhu
- Division of Cancer Epidemiology and Genetics, NIH, USA
| | - Colm J O’Rourke
- Biotech Research and Innovation Centre, Department of Health and Medical Sciences, University of Copenhagen, Denmark
| | - Deepak Kumar Bhatt
- Biotech Research and Innovation Centre, Department of Health and Medical Sciences, University of Copenhagen, Denmark
| | - Donghyuk Lee
- Division of Cancer Epidemiology and Genetics, NIH, USA
| | - Lei Song
- Division of Cancer Epidemiology and Genetics, NIH, USA
| | - Difei Wang
- Division of Cancer Epidemiology and Genetics, NIH, USA
| | | | | | - Zhiwei Liu
- Division of Cancer Epidemiology and Genetics, NIH, USA
| | | | | | - Michael Dean
- Division of Cancer Epidemiology and Genetics, NIH, USA
| | - Juan LaFuente-Barquero
- Biotech Research and Innovation Centre, Department of Health and Medical Sciences, University of Copenhagen, Denmark
| | - Scott Lawrence
- Cancer Genomics Research Laboratory, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research, Frederick, MD, USA
| | - Karun Mutreja
- Cancer Genomics Research Laboratory, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research, Frederick, MD, USA
| | - Mary E Olanich
- Cancer Genomics Research Laboratory, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research, Frederick, MD, USA
| | | | | | - Catterina Ferreccio
- Department of Public Health, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, 8330077 Chile and Advanced Center for Chronic Diseases (ACCDiS), FONDAP, Santiago, 8380492 Chile
| | - Juan Carlos Roa
- Department of Pathology, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, 8330024 Chile
| | - Asif Rashid
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Ann W Hsing
- Stanford Cancer Institute and Stanford Prevention Research Center, Department of Medicine, Stanford School of Medicine, Stanford, California, USA
| | - Yu-Tang Gao
- Department of Epidemiology, Shanghai Cancer Institute, Shanghai, China
| | | | - Juan Carlos Araya
- Hospital Dr. Hernán Henríquez Aravena, Temuco, 4780000 Chile,Department of Pathology, Faculty of Medicine, Universidad de La Frontera, Temuco, 4780000 Chile,Advanced Center for Chronic Diseases (ACCDiS), FONDAP, Santiago, 8380492 Chile
| | - Jesper B Andersen
- Biotech Research and Innovation Centre, Department of Health and Medical Sciences, University of Copenhagen, Denmark.
| | - Jill Koshiol
- Division of Cancer Epidemiology and Genetics, NIH, Rockville, MD, USA.
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11
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Liu MM, Feng Y, Yang K. Impact of micro-environmental factors on survival, reproduction and distribution of Oncomelania hupensis snails. Infect Dis Poverty 2021; 10:47. [PMID: 33827710 DOI: 10.1186/s40249-021-00826-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [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: 10/04/2020] [Accepted: 03/12/2021] [Indexed: 12/21/2022] Open
Abstract
Background Schistosomiasis japonica is a chronic parasitic disease that seriously harms people's health. Oncomelania hupensis is the only intermediate host of Schistosoma japonicum. The micro-environmental factors surrounding the snail have a great impact on the survival, growth and reproduction of O. hupensis, but there are few relevant systematic analyses until the present. This scoping review aims to identify and summarize the micro-environmental factors that greatly affect O. hupensis, and to find gaps in research thus to provide directions for future in-depth studies. Main body This scoping review searched databases with search terms of the combinations of “Micro(-)environment”, “Oncomelania” and their expanded aspects. A total of 133 original articles were recruited. Predefined data fields were extracted including research methods, influencing factors, and their effects on O. hupensis. Most studies focused on vegetation factors (54.1%), and other factors noted were soil composition (27.8%), water environmental factors (24.1%), and predator (3.0%), respectively. The factors with positive impacts included water level, pH value, soil temperature, soil humidity, the coverage and height of vegetation at suitable levels. This could provide more detailed information for O. hupensis habitat identification and prediction. The factors with negative impacts included plant extracts, snail control and disease prevention forests, and microorganisms with molluscicidal activities. It revealed a potential application as ecological molluscicides in the future. Factors such as physico-chemical properties of water, soil chemistry showed a gap in scientific studies, thus required further extensive research. Conclusions Micro-environmental factors including water quality, soil composition as well as the technology and application of biomolluscicides (plant extracts and microorganisms) deserve more attention. Relative study findings on micro-environment have good potentials in snail control applications. Further studies should be implemented to investigate the impact of micro-environmental factors on snails and close the research gaps. ![]()
Supplementary Information The online version contains supplementary material available at 10.1186/s40249-021-00826-3.
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12
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Zhao L, Liu JW, Kan BH, Shi HY, Yang LP, Liu XY. Acupuncture accelerates neural regeneration and synaptophysin production after neural stem cells transplantation in mice. World J Stem Cells 2020; 12:1576-1590. [PMID: 33505601 PMCID: PMC7789117 DOI: 10.4252/wjsc.v12.i12.1576] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 09/23/2020] [Accepted: 10/13/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Synaptophysin plays a key role in synaptic development and plasticity of neurons and is closely related to the cognitive process of Alzheimer’s disease (AD) patients. Exogenous neural stem cells (NSCs) improve the damaged nerve function. The effects of Sanjiao acupuncture on cognitive impairment may be related to the regulation of the NSC microenvironment.
AIM To explore the anti-dementia mechanism of acupuncture by regulating the NSC microenvironment.
METHODS NSCs were isolated from pregnant senescence-accelerated mouse resistant 1 (SAMR1) mice, labeled with BrdU, and injected into the hippocampus of senescence-accelerated mouse prone 8 (SAMP8) mice. Eight-month-old senescence-accelerated mice (SAM) were randomly divided into six groups: SAMR1 (RC), SAMP8 (PC), sham transplantation (PS), NSC transplantation (PT), NSC transplantation with acupuncture (PTA), and NSC transplantation with non-acupoint acupuncture (PTN). Morris water maze test was used to study the learning and memory ability of mice after NSC transplantation. Hematoxylin-eosin staining and immunofluorescence were used to observe the his-topathological changes and NSC proliferation in mice. A co-culture model of hippocampal slices and NSCs was established in vitro, and the synaptophysin expression in the hippocampal microenvironment of mice was observed by flow cytometry after acupuncture treatment.
RESULTS Morris water maze test showed significant cognitive impairment of learning and memory in 8-mo-old SAMP8, which improved in all the NSC transplantation groups. The behavioral change in the PTA group was stronger than those in the other two groups (P < 0.05). Histopathologically, the hippocampal structure was clear, the cell arrangement was dense and orderly, and the necrosis of cells in CA1 and CA3 areas was significantly reduced in the PTA group when compared with the PC group. The BrdU-positive proliferating cells were found in NSC hippocampal transplantation groups, and the number increased significantly in the PTA group than in the PT and PTN groups (P < 0.05). Flow cytometry showed that after co-culture of NSCs with hippocampal slices in vitro, the synaptophysin expression in the PC group decreased in comparison to the RC group, that in PT, PTA, and PTN groups increased as compared to the PC group, and that in the PTA group increased significantly as compared to the PTN group with acupoint-related specificity (P < 0.05).
CONCLUSION Acupuncture may promote nerve regeneration and synaptogenesis in SAMP8 mice by regulating the microenvironment of NSC transplantation to improve the nerve activity and promote the recovery of AD-damaged cells.
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Affiliation(s)
- Lan Zhao
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin 300381, China
- Tianjin Key Laboratory of Acupuncture and Moxibustion, Tianjin 300381, China
- National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin 300381, China
| | - Jian-Wei Liu
- Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China
| | - Bo-Hong Kan
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin 300381, China
- Tianjin Key Laboratory of Acupuncture and Moxibustion, Tianjin 300381, China
- National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin 300381, China
| | - Hui-Yan Shi
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin 300381, China
- Tianjin Key Laboratory of Acupuncture and Moxibustion, Tianjin 300381, China
- National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin 300381, China
| | - Lin-Po Yang
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin 300381, China
| | - Xin-Yu Liu
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin 300381, China
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13
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Merl T, Koren K. Visualizing NH 3 emission and the local O 2 and pH microenvironment of soil upon manure application using optical sensors. Environ Int 2020; 144:106080. [PMID: 32890887 DOI: 10.1016/j.envint.2020.106080] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [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: 05/28/2020] [Revised: 08/05/2020] [Accepted: 08/19/2020] [Indexed: 06/11/2023]
Abstract
The application of fertilizers and manure on fields is the largest source of ammonia (NH3) in the atmosphere.·NH3 emission from agriculture has negative environmental consequences and is largely controlled by the chemical microenvironment and the respective biological activity of the soil. While gas phase and bulk measurements can describe the emission on a large scale, those measurements fail to unravel the local processes and spatial heterogeneity at the soil air interface. We report a two dimensional (2D) imaging approach capable of visualizing three of the most important chemical parameters associated with NH3 emission from soil. Besides the released NH3 itself also O2 and pH microenvironments are imaged using reversible optodes in real-time with a spatial resolution of <100 µm. This combined optode approach utilizes a specifically developed NH3 optode with a limit of detection of 2.11 ppm and a large working range (0-1800 ppm) ideally suited for studying NH3 volatilization from soil. This NH3 optode will contribute to a better understanding of the driving factors for NH3 emission on a microscale and has the potential to become a valuable tool in studying NH3 dynamics.
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Affiliation(s)
- Theresa Merl
- Aarhus University Centre for Water Technology, Department of Biology, Section for Microbiology, Ny Munkegade 114, 8000 Aarhus C, Denmark; Graz University of Technology, Institute of Analytical Chemistry and Food Chemistry, Stremayrgasse 9/II, 8010 Graz, Austria
| | - Klaus Koren
- Aarhus University Centre for Water Technology, Department of Biology, Section for Microbiology, Ny Munkegade 114, 8000 Aarhus C, Denmark.
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Oyedeji SI, Bassi PU, Oyedeji SA, Ojurongbe O, Awobode HO. Genetic diversity and complexity of Plasmodium falciparum infections in the microenvironment among siblings of the same household in North-Central Nigeria. Malar J 2020; 19:338. [PMID: 32938438 PMCID: PMC7493857 DOI: 10.1186/s12936-020-03415-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [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: 05/19/2020] [Accepted: 09/10/2020] [Indexed: 11/10/2022] Open
Abstract
Background Plasmodium falciparum parasites are known to exhibit extensive genetic diversity in areas of high transmission intensity and infected individuals in such communities often harbour several complex mixtures of parasite clones with different genetic characteristics. However, in the micro-environment, the extent of genetic diversity of P. falciparum parasites remain largely unknown. In this study therefore, the complexity of P. falciparum infections in households was investigated among symptomatic siblings, living under the same roof in north-central Nigeria. Methods Children were enrolled into the study if they were at least two from a household and presented with symptoms of uncomplicated malaria. Clinical malaria was confirmed by light microscopy of Giemsa-stained thick and thin blood films. Genomic DNA was isolated from blood spots on filter paper. Molecular characterization of P. falciparum isolates was done by allele-specific nested PCR of the highly polymorphic merozoite surface protein-2 (msp-2) gene. Results Ninety-three children from 43 households were enrolled into this study. A total of 26 different msp-2 alleles were identified from 215 fragments (range: 180–480 bp). Majority of the isolates [65.6% (n = 61)] were polyclonal infections consisting of 2–6 clones and were significantly more common with the FC27 allelic family (p = 0.036). The multiplicity of infection (MOI) per household ranged from 1.0 to 4.5 while the overall MOI in the study population was 2.31. The pattern of distribution of msp-2 allele types among the households fell into two categories: households where both msp-2 allele types (FC27 and 3D7) were present; households where only one msp-2 allele type (FC27 or 3D7) was present. Majority of the households [88.4% (n = 38)], had both msp-2 allele types but they were disproportionately distributed among the children while in a few households [11.6% (n = 5)], all the children were infected with only one type of msp-2 allele. Conclusion These findings showed that P. falciparum isolates exhibit remarkable degree of genetic diversity in the micro-environment and are composed mainly of multiclonal infections, which is an indication of a high ongoing parasite transmission. This suggests that the micro-environment is an important area of focus for malaria control interventions and for evaluating intervention programmes.
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Affiliation(s)
- Segun Isaac Oyedeji
- Molecular Genetics and Parasitology Unit, Department of Animal & Environmental Biology, Federal University Oye-Ekiti, Oye-Ekiti, Nigeria.
| | - Peter Usman Bassi
- Department of Pharmacology and Therapeutics, University of Abuja, Abuja, Nigeria
| | | | - Olusola Ojurongbe
- Department of Medical Microbiology and Parasitology, Ladoke Akintola University of Technology, Osogbo, Nigeria
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15
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Yan X, Zheng S, Qiu D, Yang J, Han Y, Huo Z, Su X, Sun J. Characteristics of N 2O generation within the internal micro-environment of activated sludge flocs under different dissolved oxygen concentrations. Bioresour Technol 2019; 291:121867. [PMID: 31376671 DOI: 10.1016/j.biortech.2019.121867] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 07/18/2019] [Accepted: 07/20/2019] [Indexed: 06/10/2023]
Abstract
Nitrous oxide (N2O) is a strong greenhouse gas that is produced in significant quantities through biological nitrogen removal processes in wastewater treatment plants; however, N2O generation within the internal micro-environment of activated sludge flocs (ASFs) is poorly understood. In this study, microelectrodes and molecular techniques were employed to investigate the concentrations of N2O and other chemicals and the composition and distribution of microbes within ASFs, respectively. The results showed that N2O generation was correlated with the ASF micro-environment, and was significantly influenced by the dissolved oxygen (DO) concentration of the bulk wastewater. Equal N2O, DO, NH4+-N, and NO3--N concentrations were found in small flocs (<100 μm). By contrast, higher N2O generation rates and lower DO, NH4+-N, and NO3--N concentrations were detected in the center of large flocs (>200 μm) compared with those at their surfaces. Microbial structures of varying particle sizes were distinct and depended on the micro-environmental characteristics.
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Affiliation(s)
- Xu Yan
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang 453007, Henan, China.
| | - Shikan Zheng
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang 453007, Henan, China
| | - Dezhi Qiu
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Jie Yang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Yunping Han
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Zhaoman Huo
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Xianfa Su
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Jianhui Sun
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
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Abstract
Quiescence is operationally characterized as a temporary and reversible proliferation arrest. There are many preconceived ideas about quiescence, quiescent cells being generally viewed as insignificant sleeping G1 cells. In fact, quiescence is central for organism physiology and its dysregulation involved in many pathologies. The quiescent state encompasses very diverse cellular situations depending on the cell type and its environment. This diversity challenges not only quiescence uniformity but also the universality of the molecular mechanisms beyond quiescence regulation. In this mini-perspective, we discuss recent advances in the concept of quiescence, and illustrate that this multifaceted cellular state is gaining increasing attention in many fields of biology.
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Affiliation(s)
- Isabelle Sagot
- Centre National de la Recherche Scientifique, Institut de Biochimie et Génétique Cellulaires, Unité Mixte de Recherche 5095, Université de Bordeaux, CS61390, Bordeaux Cedex, 33077, France.
| | - Damien Laporte
- Centre National de la Recherche Scientifique, Institut de Biochimie et Génétique Cellulaires, Unité Mixte de Recherche 5095, Université de Bordeaux, CS61390, Bordeaux Cedex, 33077, France
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17
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Takács F, Tolnai-Kriston C, Hernádfői M, Szabó O, Szalóki G, Szepesi Á, Czeti Á, Matolcsy A, Barna G. The Effect of CD86 Expression on the Proliferation and the Survival of CLL Cells. Pathol Oncol Res 2018; 25:647-652. [PMID: 30406401 DOI: 10.1007/s12253-018-0512-7] [Citation(s) in RCA: 6] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 10/15/2018] [Indexed: 12/26/2022]
Abstract
Micro-environment plays important role in the pathogenesis of CLL by providing protective niche for CLL cells. Several molecules play important role in communication between CLL cells and immune cells like CD86.Some of the data suggest that CLL patients with high CD86 level need earlier treatments and cells with higher CD86 expression has higher proliferation rate but the role of CD86 in the survival and proliferation of CLL cells is unclear. We investigated the effect of CD86 expression to CLL cells in 50 peripheral blood and 15 lymph node biopsy samples from CLL patients. Our results showed that the expressions of CD86 increased significantly after 7 day culturing in medium, or in the presence of bone marrow stromal cells (BMSCs). We found positive correlation between CD86 and CD23 expression (p < 0.05), but no correlation with other markers. Furthermore, no correlation were found between the CD86 expression and the proliferation of CLL cells. Analysis of clinical data showed that cases with high CD86 expression had lower level of serum lymphocyte count (p < 0.04) at the time of the diagnosis. CD86 shows multiple appearances in the lymph nodes containing pseudofollicules, but no correlation was found between CD86 positivity, and Ki67 positivity. Our results suggest that the use of CD86 molecule as a proliferation marker for CLL is highly questionable. However, the CD86 molecule may interfere with the immune system of patients with CLL by activating and depleting immune functions. That can be the reason why CD86 positivity may mean worse prognosis.
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Affiliation(s)
- Ferenc Takács
- 1st Department of Pathology and Experimental Cancer Research, Semmelweis University, Üllői út 26, Budapest, H-1085, Hungary
| | - Csilla Tolnai-Kriston
- 1st Department of Pathology and Experimental Cancer Research, Semmelweis University, Üllői út 26, Budapest, H-1085, Hungary
| | - Márk Hernádfői
- 1st Department of Pathology and Experimental Cancer Research, Semmelweis University, Üllői út 26, Budapest, H-1085, Hungary
| | - Orsolya Szabó
- 1st Department of Pathology and Experimental Cancer Research, Semmelweis University, Üllői út 26, Budapest, H-1085, Hungary
| | - Gábor Szalóki
- 1st Department of Pathology and Experimental Cancer Research, Semmelweis University, Üllői út 26, Budapest, H-1085, Hungary
| | - Ágota Szepesi
- 1st Department of Pathology and Experimental Cancer Research, Semmelweis University, Üllői út 26, Budapest, H-1085, Hungary
| | - Ágnes Czeti
- 1st Department of Pathology and Experimental Cancer Research, Semmelweis University, Üllői út 26, Budapest, H-1085, Hungary
| | - András Matolcsy
- 1st Department of Pathology and Experimental Cancer Research, Semmelweis University, Üllői út 26, Budapest, H-1085, Hungary
| | - Gábor Barna
- 1st Department of Pathology and Experimental Cancer Research, Semmelweis University, Üllői út 26, Budapest, H-1085, Hungary.
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18
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Cui C, Cai D. Lipase immobilization on high water adsorbing capacity bagasse: applications in bio-based plasticizer synthesis. Mol Biol Rep 2018; 45:2095-2102. [PMID: 30209742 DOI: 10.1007/s11033-018-4366-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Accepted: 09/05/2018] [Indexed: 01/26/2023]
Abstract
This study investigates the structure and water adsorbing capacity of bagasse and of sodium hydroxide pretreated bagasse. The structures of bagasse and bagasse-NaOH were compared by SEM and XRD. Candida antarctica lipase B was then immobilized on bagasse, bagasse-NaOH and DPA@bagasse-NaOH. The expressed activity and immobilization yield of lipase immobilized on bagasse-NaOH (1.0%) was 36% and 45% higher than that on bagasse. When dopamine (DPA) was used as cationic polymer monomer via self-polymerization for mediating immobilization, the protein loading amounts and activity of lipase immobilized on DPA@bagasse-NaOH were higher than that of bagasse-NaOH. When the DPA concentration was 100 mg/ml, the immobilized lipase expressed activity reached its highest value (800 U/g), where the immobilization yield achieved 96.8%, which was 3.93-fold of lipase immobilized on native bagasse (24.6%). Then the immobilized lipases were used to synthesize a bio-based plasticizer. Lipase immobilized on DPA@bagasse-NaOH exhibited a significantly improved operational stability. Even after 12 batches, a high ester yield (84.2%) was maintained. Additionally, poly (vinyl chloride) PVC blends plasticized with methyl oleate as a secondary plasticizer were investigated. It was discovered that methyl oleate can be used as an effective bio-based plasticizer for PVC. These results indicate that bagasse with high water adsorbing capacity and self-polymerized DPA layer could create a favorable microenvironment for bio-based plasticizer synthesis in esterification reactions.
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Affiliation(s)
- Caixia Cui
- Synthetic Biology Engineering Lab of Henan Province, School of Life Science and Technology, Xinxiang Medical University, Xinxiang, 453003, People's Republic of China. .,, Xinxiang, China.
| | - Di Cai
- Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China
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Zhang T, Chillrud SN, Ji J, Chen Y, Pitiranggon M, Li W, Liu Z, Yan B. Comparison of PM 2.5 Exposure in Hazy and Non-Hazy Days in Nanjing, China. Aerosol Air Qual Res 2017; 17:2235-2246. [PMID: 30581458 PMCID: PMC6301043 DOI: 10.4209/aaqr.2016.07.0301] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Fine particulate matter (PM2.5), levels of which are about 6 times the 2014 WHO air quality guidelines for 190 cities in China, has been found to be associated with various adverse health outcomes. In this study, personal PM2.5 exposures were monitored along a fixed routine that included 19 types of non-residential micro-environments (MEs) on 4 hazy days (ambient PM2.5 292 ± 70 μg m-3) and 2 non-hazy days (55 ± 16 μg m-3) in Nanjing, China using miniaturized real-time portable particulate sensors that also collect integrated filters of PM2.5 (MicroPEMs, Research Triangle Institute (RTI), NC). Gravimetric correction is necessary for nephelometer devices in calculating real-time PM levels. During both hazy and non-hazy days, personal PM2.5 levels were generally higher in MEs with noticeable PM2.5 sources than MEs serving as receptor sites, higher in open MEs than indoor MEs, and higher in densely populated MEs than MEs with few people. Personal PM2.5 levels measured during hazy and non-hazy days were 242 ± 91 μg m-3 and 103 ± 147 μg m-3, respectively. The ratio of personal exposure to ambient PM2.5 levels (rp/a ) was less than 1.0 and less variable on hazy days (0.85 ± 0.31); while it was larger than 1.0 and more variable on non-hazy days (1.71 ± 1.93), confirming the importance of local sources other than ambient during non-hazy days. Air handling methods (e.g., ventilation/filtration) impacted personal exposures in enclosed locations on both types of days. Street food vendors with cooking emissions were MEs with the highest personal PM2.5 levels while subway cars in Nanjing were relatively clean due to good air filtration on both hazy and non-hazy days. In summary, on hazy days, personal exposure was mainly affected by the regional ambient levels, while on non-hazy days, local sources together with ambient levels determined personal exposure levels.
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Affiliation(s)
- Ting Zhang
- Key Laboratory of Surficial Geochemistry, Ministry of Education, Nanjing University, Qixia, Nanjing 210023, China
- Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964, USA
| | - Steven N. Chillrud
- Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964, USA
| | - Junfeng Ji
- Key Laboratory of Surficial Geochemistry, Ministry of Education, Nanjing University, Qixia, Nanjing 210023, China
| | - Yang Chen
- Key Laboratory of Surficial Geochemistry, Ministry of Education, Nanjing University, Qixia, Nanjing 210023, China
| | - Masha Pitiranggon
- Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964, USA
| | - Wenqing Li
- Nanjing Municipal Institute of Environment Protection, Gulou, Nanjing 210093, China
| | - Zhenyang Liu
- Key Laboratory of Surficial Geochemistry, Ministry of Education, Nanjing University, Qixia, Nanjing 210023, China
| | - Beizhan Yan
- Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964, USA
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Di Maggio F, Arumugam P, Delvecchio FR, Batista S, Lechertier T, Hodivala-Dilke K, Kocher HM. Pancreatic stellate cells regulate blood vessel density in the stroma of pancreatic ductal adenocarcinoma. Pancreatology 2016; 16:995-1004. [PMID: 27288147 PMCID: PMC5123629 DOI: 10.1016/j.pan.2016.05.393] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Revised: 05/03/2016] [Accepted: 05/23/2016] [Indexed: 12/11/2022]
Abstract
BACKGROUND/OBJECTIVES The vascular heterogeneity of pancreatic ductal adenocarcinoma (PDAC) has never been characterised. We analysed the heterogeneous vascular density of human PDAC along with its prognostic correlation. METHODS Tissue Microarrays of 87 patients with different pancreatico-biliary pathologies were analysed in an automated manner (Ariol™) after CD31 staining to assess vascular density in juxta-tumoral and panstromal compartments. In vitro and ex vivo assays were carried out to assess the role of PSC. RESULTS PDAC has a distinct vascular density and distribution of vessels compared to cholangiocarcinoma. The PDAC juxta-tumoral stroma was hypovascular and the normal adjacent rim was hypervascular compared to the panstromal compartment. These features adversely affected patient prognosis, suggesting a model for spatio-temporal PDAC evolution. Mice aortic rings and 3D organotypic cultures demonstrated pro- and anti-angiogenic signalling from activated PSC and cancer cells respectively. ATRA-induced quiescence suppressed the pro-angiogenic activity of PSC. CONCLUSION Human PDAC has variable vascularity at microscopic level suggesting that novel stromal directed therapies would need to be determined by pathological characteristics.
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Affiliation(s)
- Francesco Di Maggio
- Centre for Tumour Biology, Barts Cancer Institute - a CRUK Centre of Excellence, Queen Mary University of London, London EC1M 6BQ, UK; Barts and the London HPB Centre, The Royal London Hospital, Barts Health NHS Trust, London E1 1BB, UK
| | - Prabhu Arumugam
- Centre for Tumour Biology, Barts Cancer Institute - a CRUK Centre of Excellence, Queen Mary University of London, London EC1M 6BQ, UK; Barts and the London HPB Centre, The Royal London Hospital, Barts Health NHS Trust, London E1 1BB, UK
| | - Francesca R Delvecchio
- Centre for Tumour Biology, Barts Cancer Institute - a CRUK Centre of Excellence, Queen Mary University of London, London EC1M 6BQ, UK
| | - Silvia Batista
- Centre for Tumour Biology, Barts Cancer Institute - a CRUK Centre of Excellence, Queen Mary University of London, London EC1M 6BQ, UK
| | - Tanguy Lechertier
- Centre for Tumour Biology, Barts Cancer Institute - a CRUK Centre of Excellence, Queen Mary University of London, London EC1M 6BQ, UK
| | - Kairbaan Hodivala-Dilke
- Centre for Tumour Biology, Barts Cancer Institute - a CRUK Centre of Excellence, Queen Mary University of London, London EC1M 6BQ, UK
| | - Hemant M Kocher
- Centre for Tumour Biology, Barts Cancer Institute - a CRUK Centre of Excellence, Queen Mary University of London, London EC1M 6BQ, UK; Barts and the London HPB Centre, The Royal London Hospital, Barts Health NHS Trust, London E1 1BB, UK.
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21
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Mertens L, Van Dyck D, Ghekiere A, De Bourdeaudhuij I, Deforche B, Van de Weghe N, Van Cauwenberg J. Which environmental factors most strongly influence a street's appeal for bicycle transport among adults? A conjoint study using manipulated photographs. Int J Health Geogr 2016; 15:31. [PMID: 27586362 PMCID: PMC5007833 DOI: 10.1186/s12942-016-0058-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [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: 04/26/2016] [Accepted: 08/03/2016] [Indexed: 12/22/2022] Open
Abstract
Background Micro-environmental factors (specific features within a streetscape), instead of macro-environmental factors (urban planning features), are more feasible to modify in existing neighborhoods and thus more practical to target for environmental interventions. Because it is often not possible to change the whole micro-environment at once, the current study aims to determine which micro-environmental factors should get the priority to target in physical environmental interventions increasing bicycle transport. Additionally, interaction effects among micro-environmental factors on the street’s appeal for bicycle transport will be determined. Methods In total, 1950 middle-aged adults completed a web-based questionnaire consisting of a set of 12 randomly assigned choice tasks with manipulated photographs. Seven micro-environmental factors (type of cycle path, speed limit, speed bump, vegetation, evenness of the cycle path surface, general upkeep and traffic density) were manipulated in each photograph. Conjoint analysis was used to analyze the data. Results Providing streets with a cycle path separated from motorized traffic seems to be the best strategy to increase the street’s appeal for adults’ bicycle transport. If this adjustment is not practically feasible, micro-environmental factors related to safety (i.e. speed limit, traffic density) may be more effective in promoting bicycle transport than micro-environmental factors related to comfort (i.e. evenness of the cycle path surface) or aesthetic (i.e. vegetation, general upkeep). On the other hand, when a more separated cycle path is already provided, micro-environmental factors related to comfort or aesthetic appeared to become more prominent. Conclusions Findings obtained from this research could provide advice to physical environmental interventions about which environmental factors should get priority to modify in different environmental situations. Trial registration The study was approved by the Ethics Committee of the Ghent University Hospital. Trial registration: B670201318588. Registered at 04/10/2013. http://www.ugent.be/ge/nl/faculteit/raden/ec Electronic supplementary material The online version of this article (doi:10.1186/s12942-016-0058-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Lieze Mertens
- Department of Movement and Sport Sciences, Faculty of Medicine and Health Sciences, Ghent University, Watersportlaan 2, 9000, Ghent, Belgium
| | - Delfien Van Dyck
- Department of Movement and Sport Sciences, Faculty of Medicine and Health Sciences, Ghent University, Watersportlaan 2, 9000, Ghent, Belgium.,Research Foundation Flanders (FWO), Egmontstraat 5, 1000, Brussels, Belgium
| | - Ariane Ghekiere
- Research Foundation Flanders (FWO), Egmontstraat 5, 1000, Brussels, Belgium.,Department of Public Health, Faculty of Medicine and Health Sciences, Ghent University, De Pintelaan 185, 4k3, 9000, Ghent, Belgium.,Department of Human Biometry and Biomechanics, Faculty of Physical Education and Physical Therapy, Vrije Universiteit Brussel, Pleinlaan 2, 1050, Brussels, Belgium
| | - Ilse De Bourdeaudhuij
- Department of Movement and Sport Sciences, Faculty of Medicine and Health Sciences, Ghent University, Watersportlaan 2, 9000, Ghent, Belgium.
| | - Benedicte Deforche
- Department of Public Health, Faculty of Medicine and Health Sciences, Ghent University, De Pintelaan 185, 4k3, 9000, Ghent, Belgium.,Department of Human Biometry and Biomechanics, Faculty of Physical Education and Physical Therapy, Vrije Universiteit Brussel, Pleinlaan 2, 1050, Brussels, Belgium
| | - Nico Van de Weghe
- Department of Geography, Faculty of Sciences, Ghent University, Krijgslaan 281, S8, 9000, Ghent, Belgium
| | - Jelle Van Cauwenberg
- Research Foundation Flanders (FWO), Egmontstraat 5, 1000, Brussels, Belgium.,Department of Public Health, Faculty of Medicine and Health Sciences, Ghent University, De Pintelaan 185, 4k3, 9000, Ghent, Belgium.,Department of Human Biometry and Biomechanics, Faculty of Physical Education and Physical Therapy, Vrije Universiteit Brussel, Pleinlaan 2, 1050, Brussels, Belgium
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22
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Melikov AK. Advanced air distribution: improving health and comfort while reducing energy use. Indoor Air 2016; 26:112-24. [PMID: 25833265 DOI: 10.1111/ina.12206] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [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: 11/26/2014] [Accepted: 03/27/2015] [Indexed: 05/20/2023]
Abstract
Indoor environment affects the health, comfort, and performance of building occupants. The energy used for heating, cooling, ventilating, and air conditioning of buildings is substantial. Ventilation based on total volume air distribution in spaces is not always an efficient way to provide high-quality indoor environments at the same time as low-energy consumption. Advanced air distribution, designed to supply clean air where, when, and as much as needed, makes it possible to efficiently achieve thermal comfort, control exposure to contaminants, provide high-quality air for breathing and minimizing the risk of airborne cross-infection while reducing energy use. This study justifies the need for improving the present air distribution design in occupied spaces, and in general the need for a paradigm shift from the design of collective environments to the design of individually controlled environments. The focus is on advanced air distribution in spaces, its guiding principles and its advantages and disadvantages. Examples of advanced air distribution solutions in spaces for different use, such as offices, hospital rooms, vehicle compartments, are presented. The potential of advanced air distribution, and individually controlled macro-environment in general, for achieving shared values, that is, improved health, comfort, and performance, energy saving, reduction of healthcare costs and improved well-being is demonstrated. Performance criteria are defined and further research in the field is outlined.
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Affiliation(s)
- A K Melikov
- Department of Civil Engineering, International Centre for Indoor Environment and Energy, Technical University of Denmark, Lyngby, Denmark
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23
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Li B, Qiu T, Iyer KS, Yan Q, Yin Y, Xie L, Wang X, Li S. PRGD/PDLLA conduit potentiates rat sciatic nerve regeneration and the underlying molecular mechanism. Biomaterials 2015; 55:44-53. [PMID: 25934451 DOI: 10.1016/j.biomaterials.2015.03.028] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2014] [Revised: 03/09/2015] [Accepted: 03/15/2015] [Indexed: 02/01/2023]
Abstract
Peripheral nerve injury requires optimal conditions in both macro-environment and micro-environment for reestablishment. Though various strategies have been carried out to improve the macro-environment, the underlying molecular mechanism of axon regeneration in the micro-environment provided by nerve conduit remains unclear. In this study, the rat sciatic nerve of 10 mm defect was made and bridged by PRGD/PDLLA nerve conduit. We investigated the process of nerve regeneration using histological, functional and real time PCR analyses after implantation from 7 to 35 days. Our data demonstrated that the ciliary neurotrophic factor highly expressed and up-regulated the downstream signaling pathways, in the case of activated signals, the expressions of axon sprout relative proteins, such as tubulin and growth-associated protein-43, were strongly augmented. Taken together, these data suggest a possible mechanism of axon regeneration promoted by PRGD/PDLLA conduit, which created a micro-environment for enhancement of diffusion of neurotrophic factors secreted by the injured nerve stumps, and activation of molecular signal transduction involved in growth cone, to potentiate the nerve recovery.
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Affiliation(s)
- Binbin Li
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, PR China; Biomedical Materials and Engineering Research Center of Hubei Province, Wuhan 430070, PR China
| | - Tong Qiu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, PR China; Biomedical Materials and Engineering Research Center of Hubei Province, Wuhan 430070, PR China.
| | - K Swaminathan Iyer
- School of Chemistry and Biochemistry, The University of Western Australia, Crawley WA 6009, Australia
| | - Qiongjiao Yan
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, PR China; Biomedical Materials and Engineering Research Center of Hubei Province, Wuhan 430070, PR China
| | - Yixia Yin
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, PR China; Biomedical Materials and Engineering Research Center of Hubei Province, Wuhan 430070, PR China
| | - Lijuan Xie
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, PR China; Biomedical Materials and Engineering Research Center of Hubei Province, Wuhan 430070, PR China
| | - Xinyu Wang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, PR China; Biomedical Materials and Engineering Research Center of Hubei Province, Wuhan 430070, PR China
| | - Shipu Li
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, PR China; Biomedical Materials and Engineering Research Center of Hubei Province, Wuhan 430070, PR China.
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Wong TY, Solis MA, Chen YH, Huang LLH. Molecular mechanism of extrinsic factors affecting anti-aging of stem cells. World J Stem Cells 2015; 7:512-520. [PMID: 25815136 PMCID: PMC4369508 DOI: 10.4252/wjsc.v7.i2.512] [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] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Revised: 10/02/2014] [Accepted: 11/19/2014] [Indexed: 02/06/2023] Open
Abstract
Scientific evidence suggests that stem cells possess the anti-aging ability to self-renew and maintain differentiation potentials, and quiescent state. The objective of this review is to discuss the micro-environment where stem cells reside in vivo, the secreted factors to which stem cells are exposed, the hypoxic environment, and intracellular factors including genome stability, mitochondria integrity, epigenetic regulators, calorie restrictions, nutrients, and vitamin D. Secreted tumor growth factor-β and fibroblast growth factor-2 are reported to play a role in stem cell quiescence. Extracellular matrices may interact with caveolin-1, the lipid raft on cell membrane to regulate quiescence. N-cadherin, the adhesive protein on niche cells provides support for stem cells. The hypoxic micro-environment turns on hypoxia-inducible factor-1 to prevent mesenchymal stem cells aging through p16 and p21 down-regulation. Mitochondria express glucosephosphate isomerase to undergo glycolysis and prevent cellular aging. Epigenetic regulators such as p300, protein inhibitors of activated Stats and H19 help maintain stem cell quiescence. In addition, calorie restriction may lead to secretion of paracrines cyclic ADP-ribose by intestinal niche cells, which help maintain intestinal stem cells. In conclusion, it is crucial to understand the anti-aging phenomena of stem cells at the molecular level so that the key to solving the aging mystery may be unlocked.
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Abstract
The concept of therapeutic landscapes, as introduced by Gesler, has had a significant impact on what has become a reformed geography (or geographies) of health. Research in this field has developed the number and type of sites that have been characterised as therapeutic landscapes. A wide range of environments have now been explored through the analytical lens of the 'therapeutic landscape'. This research further expands current descriptions of such environments by exploring Edgelands as therapeutic micro landscapes. Edgelands refer to the neglected and routinely ignored interfacial zone between urban and rural that are a routine characteristic of the urban fringe resulting from dynamic cycles of urban development and decay. Using a hybrid method of thematic analysis incorporating both inductive and deductive approaches, this research explores Richard Mabey's seminal work on this topic, The Unofficial Countryside. Previous examinations of the features of therapeutic environments are therefore scrutinised to explore both scale and the possibility of further extending the kind of environments that may be described as therapeutic to include Edgelands. This approach is informed, in part, by principles of mindfulness, a historically Eastern, but increasingly Western approach to exploring oneself and the environment. This research identifies that these overlooked and neglected landscapes are in fact vibrant, resilient and enthralling environments teeming with life, renewal and re-birth. Examination reveals that there are three crucial outcomes of this research. The first relates to the issue of scale. Mabey's book provides evidence of the importance of micro environments in providing a therapeutic environmental focus. Secondly, this research explores the potential of mindfulness as an approach in Geography. Lastly, this research also identifies Edgelands as therapeutic sites and calls for an increased understanding and appreciation of their potential.
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Affiliation(s)
- Frank Houghton
- College of Health Science & Public Health, Eastern Washington University, Spokane, WA, USA.
| | - Sharon Houghton
- Department of Psychology, University of Limerick, Limerick, Ireland
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26
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Hock BD, Macpherson SA, Fernyhough LJ, McKenzie JL. Chronic lymphocytic leukaemia cells become both activated and immunosuppressive following interaction with CD3 and CD28 stimulated PBMC. Leuk Res 2014; 38:1217-23. [PMID: 24976339 DOI: 10.1016/j.leukres.2014.06.004] [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: 03/11/2014] [Revised: 05/30/2014] [Accepted: 06/08/2014] [Indexed: 01/06/2023]
Abstract
Chronic lymphocytic leukaemia (CLL) is associated with immunosuppression. The activation of CLL cells induced by interaction with other cell types, particularly activated T-cells, within the tumour micro-environment is thought to be important for CLL progression. However it is unclear whether activated CLL cells (CLL(Act)) have immunosuppressive capacity. We report that co-culture of CLL cells with normal PBMC in the context of CD3/CD28 T-cell activation generates CLL(Act) with increased CD38 expression that are capable of suppressing the proliferative responses of both CD4+ and CD8+ T-cells. The suppression required cell contact but did not involve induction of T-cell apoptosis.
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Affiliation(s)
- B D Hock
- Haematology Research Group, Christchurch Hospital, Christchurch, New Zealand; Pathology Department, University of Otago, Christchurch, New Zealand.
| | - S A Macpherson
- Haematology Department, Christchurch Hospital, Christchurch, New Zealand; Pathology Department, University of Otago, Christchurch, New Zealand
| | - L J Fernyhough
- Haematology Department, Christchurch Hospital, Christchurch, New Zealand; Pathology Department, University of Otago, Christchurch, New Zealand
| | - J L McKenzie
- Haematology Research Group, Christchurch Hospital, Christchurch, New Zealand; Pathology Department, University of Otago, Christchurch, New Zealand
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27
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Roemmich JN, Beeler JE, Johnson L. A microenvironment approach to reducing sedentary time and increasing physical activity of children and adults at a playground. Prev Med 2014; 62:108-12. [PMID: 24502848 DOI: 10.1016/j.ypmed.2014.01.018] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2013] [Revised: 01/14/2014] [Accepted: 01/27/2014] [Indexed: 11/23/2022]
Abstract
OBJECTIVE Test whether a micro-environment park intervention in Grand Forks, North Dakota, movement of seating away from a playground, would increase the physical activity and length of stay of park users. METHOD Study 1, summer 2012: physical activity of children and adults was assessed during baseline (A1) with seating in usual, standardized locations; with seating removed from the playground (B); and with seating returned to original locations (A2). Study 2, summer 2013: the study was repeated with the inclusion of a daily 2-hour assessment during which activity of each family member was recorded every 15-min and length of stay was recorded. RESULTS For both studies, the MET (metabolic equivalent) intensity was greater (p<0.02) during condition B than during A1 and A2. For adults, the odds of being in moderate-to-vigorous physical activity than sitting during condition B were 4.1 to 22.7 greater than those during conditions A1 and A2. During the 2-hour serial observations, MET intensities during condition B were greater (p<0.005) than those during A1 and A2. The duration families stayed at the park did not differ across conditions. CONCLUSION Adults were more active when seating was not accessible. Removal of seating did not shorten the time that adults were willing to allow children to play.
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Verhulsel M, Vignes M, Descroix S, Malaquin L, Vignjevic DM, Viovy JL. A review of microfabrication and hydrogel engineering for micro-organs on chips. Biomaterials 2013; 35:1816-32. [PMID: 24314552 DOI: 10.1016/j.biomaterials.2013.11.021] [Citation(s) in RCA: 144] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Accepted: 11/07/2013] [Indexed: 12/28/2022]
Abstract
This review highlights recent trends towards the development of in vitro multicellular systems with definite architectures, or "organs on chips". First, the chemical composition and mechanical properties of the scaffold have to be consistent with the anatomical environment in vivo. In this perspective, the flourishing interest in hydrogels as cellular substrates has highlighted the main parameters directing cell differentiation that need to be recapitulated in artificial matrix. Another scaffold requirement is to act as a template to guide tissue morphogenesis. Therefore specific microfabrication techniques are required to spatially pattern the environment at microscale. 2D patterning is particularly efficient for organizing planar polarized cell types such as endothelial cells or neurons. However, most organs are characterized by specific sub units organized in three dimensions at the cellular level. The reproduction of such 3D patterns in vitro is necessary for cells to fully differentiate, assemble and coordinate to form a coherent micro-tissue. These physiological microstructures are often integrated in microfluidic devices whose controlled environments provide the cell culture with more life-like conditions than traditional cell culture methods. Such systems have a wide range of applications, for fundamental research, as tools to accelerate drug development and testing, and finally, for regenerative medicine.
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Affiliation(s)
- Marine Verhulsel
- Macromolécules et Microsystèmes en Biologie et en Médecine, Institut Curie, UMR 168, Paris 75005, France
| | - Maéva Vignes
- Macromolécules et Microsystèmes en Biologie et en Médecine, Institut Curie, UMR 168, Paris 75005, France
| | - Stéphanie Descroix
- Macromolécules et Microsystèmes en Biologie et en Médecine, Institut Curie, UMR 168, Paris 75005, France
| | - Laurent Malaquin
- Macromolécules et Microsystèmes en Biologie et en Médecine, Institut Curie, UMR 168, Paris 75005, France
| | | | - Jean-Louis Viovy
- Macromolécules et Microsystèmes en Biologie et en Médecine, Institut Curie, UMR 168, Paris 75005, France.
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Wood SL, Pernemalm M, Crosbie PA, Whetton AD. The role of the tumor-microenvironment in lung cancer-metastasis and its relationship to potential therapeutic targets. Cancer Treat Rev 2014; 40:558-66. [PMID: 24176790 DOI: 10.1016/j.ctrv.2013.10.001] [Citation(s) in RCA: 294] [Impact Index Per Article: 26.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2013] [Accepted: 10/06/2013] [Indexed: 12/14/2022]
Abstract
Non-small cell lung cancer (NSCLC) accounts for >80% of lung cancer cases and currently has an overall five-year survival rate of only 15%. Patients presenting with advanced stage NSCLC die within 18-months of diagnosis. Metastatic spread accounts for >70% of these deaths. Thus elucidation of the mechanistic basis of NSCLC-metastasis has potential to impact on patient quality of life and survival. Research on NSCLC metastasis has recently expanded to include non-cancer cell components of tumors-the stromal cellular compartment and extra-cellular matrix components comprising the tumor-microenvironment. Metastasis (from initial primary tumor growth through angiogenesis, intravasation, survival in the bloodstream, extravasation and metastatic growth) is an inefficient process and few released cancer cells complete the entire process. Micro-environmental interactions assist each of these steps and discovery of the mechanisms by which tumor cells co-operate with the micro-environment are uncovering key molecules providing either biomarkers or potential drug targets. The major sites of NSCLC metastasis are brain, bone, adrenal gland and the liver. The mechanistic basis of this tissue-tropism is beginning to be elucidated offering the potential to target stromal components of these tissues thus targeting therapy to the tissues affected. This review covers the principal steps involved in tumor metastasis. The role of cell-cell interactions, ECM remodeling and autocrine/paracrine signaling interactions between tumor cells and the surrounding stroma is discussed. The mechanistic basis of lung cancer metastasis to specific organs is also described. The signaling mechanisms outlined have potential to act as future drug targets minimizing lung cancer metastatic spread and morbidity.
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