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Hou H, Xu Z, Takeda YS, Powers M, Yang Y, Hershberger K, Hanscom H, Svenson S, Simhadri RK, Vegas AJ. Quantitative biodistribution of nanoparticles in plants with lanthanide complexes. Sci Rep 2023; 13:21440. [PMID: 38052849 PMCID: PMC10698154 DOI: 10.1038/s41598-023-47811-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Accepted: 11/18/2023] [Indexed: 12/07/2023] Open
Abstract
The inefficient distribution of fertilizers, nutrients, and pesticides on crops is a major challenge in modern agriculture that leads to reduced productivity and environmental pollution. Nanoformulation of agrochemicals is an attractive approach to enable the selective delivery of agents into specific plant organs, their release in those tissues, and improve their efficiency. Already commercialized nanofertilizers utilize the physiochemical properties of metal nanoparticles such as size, charge, and the metal core to overcome biological barriers in plants to reach their target sites. Despite their wide application in human diseases, lipid nanoparticles are rarely used in agricultural applications and a systematic screening approach to identifying efficacious formulations has not been reported. Here, we developed a quantitative metal-encoded platform to determine the biodistribution of different lipid nanoparticles in plant tissues. In this platform lanthanide metal complexes were encapsulated into four types of lipid nanoparticles. Our approach was able to successfully quantify payload accumulation for all the lipid formulations across the roots, stem, and leaf of the plant. Lanthanide levels were 20- to 57-fold higher in the leaf and 100- to 10,000-fold higher in the stem for the nanoparticle encapsulated lanthanide complexes compared to the unencapsulated, free lanthanide complex. This system will facilitate the discovery of nanoparticles as delivery carriers for agrochemicals and plant tissue-targeting products.
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Affiliation(s)
- H Hou
- Division of Materials Science and Engineering, Boston University, Boston, MA, USA
| | - Z Xu
- Department of Chemistry, Boston University, Boston, MA, USA
| | | | - M Powers
- Invaio Sciences, Cambridge, MA, USA
| | - Y Yang
- Invaio Sciences, Cambridge, MA, USA
| | | | | | | | | | - A J Vegas
- Division of Materials Science and Engineering, Boston University, Boston, MA, USA.
- Department of Chemistry, Boston University, Boston, MA, USA.
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Geng F, Ren Y, Hou H, Dai B, Scott JB, Strickland SL, Mehta S, Li J. Gender equity of authorship in pulmonary medicine over the past decade. Pulmonology 2023; 29:495-504. [PMID: 37210334 DOI: 10.1016/j.pulmoe.2023.03.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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] [Received: 12/12/2022] [Revised: 03/24/2023] [Accepted: 03/24/2023] [Indexed: 05/22/2023] Open
Abstract
BACKGROUND Gender disparity in authorship broadly persists in medical literature, little is known about female authorship within pulmonary medicine. METHODS A bibliometric analysis of publications from 2012 to 2021 in 12 journals with the highest impact in pulmonary medicine was conducted. Only original research and review articles were included. Names of the first and last authors were extracted and their genders were identified using the Gender-API web. Female authorship was described by overall distribution and distribution by country/region/continent and journal. We compared the article citations by gender combinations, evaluated the trend in female authorship, and forecasted when parity for first and last authorship would be reached. We also conducted a systematic review of female authorship in clinical medicine. RESULTS 14,875 articles were included, and the overall percentage of female first authors was higher than last authors (37.0% vs 22.2%, p<0.001). Asia had the lowest percentage of female first (27.6%) and last (15.2%) authors. The percentages of female first and last authors increased slightly over time, except for a rapid increase in the COVID-19 pandemic periods. Parity was predicted in 2046 for the first authors and 2059 for the last authors. Articles with male authors were cited more than articles with female authors. However, male-male collaborations significantly decreased, whereas female-female collaborations significantly increased. CONCLUSIONS Despite the slow improvement in female authorship over the past decade, there is still a substantial gender disparity in female first and last authorship in high-impact medical journals in pulmonary medicine.
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Affiliation(s)
- F Geng
- Department of Pulmonary and Critical Care Medicine, The First Hospital of China Medical University, Shenyang, China
| | - Y Ren
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing, China
| | - H Hou
- Department of Pulmonary and Critical Care Medicine, The First Hospital of China Medical University, Shenyang, China
| | - B Dai
- Department of Pulmonary and Critical Care Medicine, The First Hospital of China Medical University, Shenyang, China
| | - J B Scott
- Department of Cardiopulmonary Sciences, Division of Respiratory Care, Rush University, Chicago, Illinois, USA
| | - S L Strickland
- American Epilepsy Society, Programs, Chicago, Illinois, USA; Department of Health Sciences, Rush University, Chicago, Illinois, USA
| | - S Mehta
- Department of Medicine and Interdepartmental Division of Critical Care Medicine, Sinai Health System, University of Toronto, Toronto, ON, Canada
| | - J Li
- Department of Cardiopulmonary Sciences, Division of Respiratory Care, Rush University, Chicago, Illinois, USA.
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Hou H, Pang L, Zhao L, Liu Z, Xing JH. Hemoglobin as a prognostic marker for neurological outcomes in post-cardiac arrest patients: a meta-analysis. Sci Rep 2023; 13:18531. [PMID: 37898729 PMCID: PMC10613227 DOI: 10.1038/s41598-023-45818-5] [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] [Received: 08/26/2023] [Accepted: 10/24/2023] [Indexed: 10/30/2023] Open
Abstract
The aim of this study was to investigate the relationship between serum level of hemoglobin and neurological outcomes following cardiac arrest. Relevant studies were identified by searching electronic databases including PubMed, Web of Science, Cochrane Library, and Embase from June 2012 through April 2023. Articles were rigorously reviewed for their study inclusion and exclusion criteria. Pooled effect date was determined using the standardized mean difference (SMD) and 95% confidence intervals (CI). The Newcastle-Ottawa Scale was used to evaluate study quality. Subgroup analyses were conducted to determine confounding factors affecting patient outcomes. Study heterogeneity, sensitivity, and publication bias were also determined.This meta-analysis included 11 studies involving 2519 patients. Our results suggest that high serum level of hemoglobin may improve neurological prognosis(SMD = 0.60, 95%CI = 0.49-0.71, I2 = 10.85). The findings of this study indicate that serum level of hemoglobin may be associated with better neurological prognosis, perhaps an appropriate increase in serum haemoglobin levels can improve the neurological prognosis of patients in cardiac arrest.
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Affiliation(s)
- Hongxiang Hou
- Department of Emergency, the First Hospital of Jilin University, Xinmin Street 1, Chaoyang District, Changchun, China
| | - Li Pang
- Department of Emergency, the First Hospital of Jilin University, Xinmin Street 1, Chaoyang District, Changchun, China
| | - Liang Zhao
- Rehabilitation Department, the First Hospital of Jilin University, Changchun, China
| | - Zuolong Liu
- Department of Emergency, the First Hospital of Jilin University, Xinmin Street 1, Chaoyang District, Changchun, China
| | - Ji-Hong Xing
- Department of Emergency, the First Hospital of Jilin University, Xinmin Street 1, Chaoyang District, Changchun, China.
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4
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Zhao CM, Hou H, Xing MG, Xue RG. [Identification of Stigma Specific Expression Fragment in the Promoter of a Soybean Chitinase Class I Gene]. Mol Biol (Mosk) 2023; 57:95-97. [PMID: 36976742 DOI: 10.31857/s0026898423010172] [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: 04/26/2022] [Accepted: 08/23/2022] [Indexed: 03/29/2023]
Abstract
The expression level of heterologous genes in transgenic plants serves as an important indicator of gene efficiency. The small number of currently known effective promoters, limits the possibilities in fine-tuning the expression of transgenes. We cloned and characterized a tissue-specific promoter fragment of the soybean chitinase class I gene (GmChi1). The GmChi1 promoter (GmChi1P) was cloned from Jungery soybean. The promoter sequence contains a number of putative cis-acting elements, including tissue-specific and stress-regulated motifs. By histochemical analysis, the GmChi1P-controlled β-glucuronidase (GUS) reporter enzyme activity was shown to be highest in the roots of transgenic Nicotiana tabacum cv. NC89 at the four-leaf sprout formation stage. Interestingly, the high GUS activity in transgenic tobacco roots was effectively suppressed by salicylic acid (SA) treatment. Deletion analysis of GmChi1P revealed that the sequences located between positions -719 and -382 contain key cis-elements responsible for the reporter uidA gene expression (encoding GUS) in leaves, roots, and wounds of Nicotiana tabacum. In addition, fluorometric analysis showed that the activity of the shortened ChiP(-1292) to ChiP(-719) promoters in the roots of transgenic tobacco was significantly suppressed by abscisic acid and completely suppressed by SA. The ChiP(-382) promoter was also found to be expressed exclusively in the stigma of transgenic tobacco flowers. Using the GUS reporter enzyme, no staining was detected in other flower organs in transgenic Nicotiana tabacum, including sepals, petals, anthers, filaments, and ovaries, or in any vegetative tissues. The results indicate that the promoter fragment ChiP(-382) can be used in tissue-specific regulation of gene expression and plant genetic engineering.
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Affiliation(s)
- C M Zhao
- College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109 China
| | - H Hou
- College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109 China
| | - M G Xing
- Ubrigene (Jinan) Biosciences Co., Ltd, Jinan, 250000 China
| | - R-G Xue
- College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109 China
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Newton J, Pushie M, Sylvain N, Hou H, Weese Maley S, Kelly M. Sex differences in the mouse photothrombotic stroke model investigated with X-ray fluorescence microscopy and Fourier transform infrared spectroscopic imaging. IBRO Neurosci Rep 2022; 13:127-135. [PMID: 35989697 PMCID: PMC9386104 DOI: 10.1016/j.ibneur.2022.07.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 07/30/2022] [Indexed: 11/16/2022] Open
Abstract
Stroke is a leading cause of death and disability around the world. To date, the majority of pre-clinical research has been performed using male lab animals and results are commonly generalized to both sexes. In clinical stoke cases females have a higher incidence of ischemic stroke and poorer outcomes, compared to males. Best practices for improving translatability of findings for stroke, encourage the use of both sexes in studies. Since estrogen and progesterone have recognized neuroprotective effects, it is important to compare the size, severity and biochemical composition of the brain tissue following stroke in female and male animal models. In this study a photothrombotic focal stroke was induced in male and female mice. Vaginal secretions were collected twice daily to track the stage of estrous. Mice were euthanized at 24 h post-stroke. Histological staining, Fourier transform infrared imaging and X-ray fluorescence imaging were performed to better define the size and metabolic markers in the infarct core and surrounding penumbra. Our results show while the female mice had a significantly lower body mass than males, the cross-sectional area of the brain and the size of infarct and penumbra were not significantly different between the groups. In addition to the general expected sex-linked differences of altered NADH levels between males and females, estrus females had significantly elevated glycogen in the penumbra compared with males and total phosphorus levels were noted to be higher in the penumbra of estrus females. Elevated glycogen reserves in the tissue bordering the infarct core in females may present alternatives for improved functional recovery in females in the early post-stroke phase.
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Affiliation(s)
- J.M. Newton
- Department of Surgery, College of Medicine, University of Saskatchewan, SK S7N 5E5, Canada
| | - M.J. Pushie
- Department of Surgery, College of Medicine, University of Saskatchewan, SK S7N 5E5, Canada
| | - N.J. Sylvain
- Department of Surgery, College of Medicine, University of Saskatchewan, SK S7N 5E5, Canada
- Clinical Trial Support Unit, College of Medicine, University of Saskatchewan, SK S7N 0W8, Canada
| | - H. Hou
- Department of Surgery, College of Medicine, University of Saskatchewan, SK S7N 5E5, Canada
| | - S. Weese Maley
- Clinical Trial Support Unit, College of Medicine, University of Saskatchewan, SK S7N 0W8, Canada
| | - M.E. Kelly
- Department of Surgery, College of Medicine, University of Saskatchewan, SK S7N 5E5, Canada
- Corresponding author.
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Zheng B, Keen K, Fritzler M, Ryerson C, Wilcox P, Whalen B, Sahin B, Hou H, Latham P, Zhang MF, Yao I, Dunne J. POS0869 CYTOKINES IN SYSTEMIC SCLEROSIS RELATED INTERSTITIAL LUNG DISEASE AND IDIOPATHIC PULMONARY FIBROSIS. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.1905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BackgroundImmune pathways have been implicated in both systemic sclerosis (SSc)-related interstitial lung disease (ILD) and idiopathic pulmonary fibrosis (IPF). Determination of blood cytokine differences in these two disorders need to be elucidated to better understand potential biological processes and common pathogenic pathways.ObjectivesThis study compared 87 circulating cytokine levels amongst healthy controls and both SSc-ILD and IPF. There was also exploration of the association between cytokine levels and disease progression based on the annualized rate of decline of forced vital capacity (FVC) and diffusing capacity for carbon monoxide (DLCO).MethodsLevels of 87 plasma cytokines were measured using commercial panels for consecutive SSc-ILD, IPF, and healthy individuals recruited at a Canadian tertiary-care center. Pulmonary function tests were performed as clinically indicated every 3-12 months. Cytokine levels are compared using the Wilcoxon rank sum test for two samples pairwise. The association between differentially expressed cytokines with both percent predicted annualized FVC and DLCO change was assessed within each disease group using multiple linear models adjusted for age, sex, baseline FVC, and immunosuppressive or anti-fibrotic treatment at sampling. Correction for multiplicity of testing was by Holm’s method.ResultsThere were 19 healthy controls, 40 SSc-ILD, and 17 IPF participants with clinical features shown in Table 1. Eotaxin-1 and interleukin 6 (IL-6) were significantly elevated in both SSc-ILD and IPF compared to healthy controls (Figure 1). SSc-ILD had significantly lower soluble epidermal growth factor receptor (sEGFR) and higher levels of both soluble tumor necrosis factor receptor type II (sTNFRII) and soluble vascular endothelial growth factor receptor-1 (sVEGFR1) compared to healthy controls. IPF cases were distinguished from healthy controls by significantly higher monocyte chemoattractant protein-1 (MCP-1) and monokine induced by gamma interferon (MIG, also known as CXCL9) levels. No significant association was found for any of the cytokines with ILD progression based on annualized rates of either FVC or DLCO change.Table 1.Baseline patient characteristics stratified by disease groupsHealthy control(n = 19)SSc-ILD(n = 40)IPF(n = 17)Age, year51 ± 1956 ± 1273 ± 7Male, count (%)6 (32)12 (30)12 (71)Disease duration, yearNA6.41 (7.81)1.76 (2.14)Ever smoker, count (%)2 (11)19 (48)14 (82)•4 (82)oker0.4 [0, 1]11 [4, 29]19 [11, 35]Treatment presence, count (%)NA16 (40)7 (41)Baseline FVC %NA80 ± 2285 ± 21Baseline DLCO %NA51 ± 1749 ± 11Annualized FVC % changeNA-1.7 ± 8.2-6.2 ± 13.6Annualized DLCO % changeNA-0.5 ± 6.2-7.8 ± 18.6The number (%), mean ± standard deviation, and median [interquartile range] are shown. Disease duration is defined as time of ILD first seen on HRCT in IPF and time from first non-Raynaud’s phenomenon in SSc-ILD. Treatment includes presence of ILD therapies: nintedanib, pirfenidone, mycophenolate mofetil, azathioprine, rituximab. FVC = forced vital capacity, DLCO = diffusing capacity for carbon monoxideFigure 1.Notched box plots of cytokine differences between disease groups. All cytokine levels are shown on a log scale. Overlap of notches indicates lack of a statistically significant difference in medians in a pairwise comparison. P-values are for SSc-ILD or IPF compared to healthy controls using Wilcoxon rank sum two-sample test corrected for multiple testing using Holms method.ConclusionDifferences in seven circulating cytokines between healthy controls with both SSc-ILD and IPF show evidence of systemic cytokine activation. All seven cytokines have a role in immune cell extravasation and pro-fibrotic signaling, which provides further evidence of immune pathways involved in pulmonary fibrosis. Further studies will be pursued of longitudinal change of these biomarkers for halting or slowing disease progression and improving response to treatment.Disclosure of InterestsBoyang Zheng: None declared, Kevin Keen Grant/research support from: Merck Canada Inc, Marvin Fritzler Shareholder of: Abbott Laboratories; Roche Holdings; Abcellera; Moderna, Speakers bureau: For diagnostic company: Werfen, Consultant of: For diagnostic company: Werfen; Aesku, Employee of: Medical Director of Mitogen Diagnostics, Christopher Ryerson Speakers bureau: Boehringer Ingelheim, Hoffmann-La Roche, Consultant of: Boehringer Ingelheim, Hoffmann-La Roche, Veracyte, Astra Zeneca, Grant/research support from: Boehringer Ingelheim, Hoffmann-La Roche, Pearce Wilcox Speakers bureau: Vertex, Valeo, Boehringer, Beth Whalen: None declared, Basak Sahin: None declared, Haiyan Hou Employee of: Mitogen Diagnostics, Penny Latham Employee of: Eve technologies, Mei Feng Zhang Employee of: Mitogen diagnostics, Iris Yao: None declared, James Dunne: None declared
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Pushie MJ, Messmer M, Sylvain NJ, Heppner J, Newton JM, Hou H, Hackett MJ, Kelly ME, Peeling L. Multimodal imaging of hemorrhagic transformation biomarkers in an ischemic stroke model. Metallomics 2022; 14:mfac007. [PMID: 35254441 PMCID: PMC9056027 DOI: 10.1093/mtomcs/mfac007] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Accepted: 01/04/2022] [Indexed: 11/13/2022]
Abstract
Hemorrhagic transformation of ischemic stroke has devastating consequences, with high mortality and poor functional outcomes. Animal models of ischemic stroke also demonstrate the potential for hemorrhagic transformation, which complicates biochemical characterization, treatment studies, and hinders poststroke functional outcomes in affected subjects. The incidence of hemorrhagic transformation of ischemic stroke in animal model research is not commonly reported. The postmortem brain of such cases presents a complex milieu of biomarkers due to the presence of healthy cells, regions of varying degrees of ischemia, dead and dying cells, dysregulated metabolites, and blood components (especially reactive Fe species released from lysed erythrocytes). To improve the characterization of hemorrhage biomarkers on an ischemic stroke background, we have employed a combination of histology, X-ray fluorescence imaging (XFI), and Fourier transform infrared (FTIR) spectroscopic imaging to assess 122 photothrombotic (ischemic) stroke brains. Rapid freezing preserves brain biomarkers in situ and minimizes metabolic artifacts due to postmortem ischemia. Analysis revealed that 25% of the photothrombotic models had clear signs of hemorrhagic transformation. The XFI and FTIR metabolites provided a quantitative method to differentiate key metabolic regions in these models. Across all hemorrhage cases, it was possible to consistently differentiate otherwise healthy tissue from other metabolically distinct regions, including the ischemic infarct, the ischemic penumbra, blood vessels, sites of hemorrhage, and a region surrounding the hemorrhage core that contained elevated lipid oxidation. Chemical speciation of deposited Fe demonstrates the presence of heme-Fe and accumulation of ferritin.
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Affiliation(s)
- M J Pushie
- Department of Surgery, Division of Neurosurgery, College of Medicine, University of Saskatchewan, SK S7N 5E5, Canada
| | - M Messmer
- Department of Surgery, Division of Neurosurgery, College of Medicine, University of Saskatchewan, SK S7N 5E5, Canada
| | - N J Sylvain
- Clinical Trial Support Unit, College of Medicine, University of Saskatchewan, Saskatoon, SK S7N 0W8, Canada
| | - J Heppner
- Department of Surgery, Division of Neurosurgery, College of Medicine, University of Saskatchewan, SK S7N 5E5, Canada
| | - J M Newton
- Department of Surgery, Division of Neurosurgery, College of Medicine, University of Saskatchewan, SK S7N 5E5, Canada
| | - H Hou
- Department of Surgery, Division of Neurosurgery, College of Medicine, University of Saskatchewan, SK S7N 5E5, Canada
| | - M J Hackett
- Curtin Health Innovation Research Institute, Curtin University, Perth, WA 6102, AUS
- School of Molecular and Life Sciences, Curtin University, Perth, WA 6845, AUS
| | - M E Kelly
- Department of Surgery, Division of Neurosurgery, College of Medicine, University of Saskatchewan, SK S7N 5E5, Canada
| | - L Peeling
- Department of Surgery, Division of Neurosurgery, College of Medicine, University of Saskatchewan, SK S7N 5E5, Canada
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Zhao S, Terada A, Nakamura K, Nakashima M, Komai T, Riya S, Hosomi M, Hou H. Significance of soil moisture on temperature dependence of Hg emission. J Environ Manage 2022; 305:114308. [PMID: 34953228 DOI: 10.1016/j.jenvman.2021.114308] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 11/10/2021] [Accepted: 12/12/2021] [Indexed: 06/14/2023]
Abstract
Soil moisture is a key factor for mercury (Hg) emission from soil. Despite its significance for Hg emissions, the effect of soil moisture on Hg flux and fractions has not been thoroughly investigated. The objective of this study was to elucidate the influences of soil moisture and temperature on Hg fluxes from soils and Hg fractions. A kinetic study was performed to measure Hg emission fluxes of six soil samples under different temperature (T) (15 °C, 20 °C, 25 °C, 30 °C, and 35 °C) and moisture conditions (0%, 10%, and 20% added water). The results showed that the Hg fluxes increased with increases in T and soil moisture. A linear correlation was found between ln (Hg emission flux) and 1/T for the six soil samples at different moisture contents (R2 = 0.73-0.99). The range of activation energy (Ea) values was 25.31-57.86 kJ/mol. The Hg fractions in soils of different moisture content were determined by a sequential extraction method. The results demonstrated that soil moisture affected the Hg fractions in soils. The Ea values had different relationships with soil moisture in different soils. There were correlations between Ea and the elemental and mercuric sulfide fractions for air-dried soils. However, for moist soils, Ea was negatively correlated with the water-soluble and acid-soluble fractions. Collectively, the combination of the Hg emission kinetics and Hg fraction measurement of different moist soils indicated that Hg emission was affected by both total Hg concentration and Hg fractions.
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Affiliation(s)
- S Zhao
- Department of Chemical Engineering, Faculty of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo, 184-8588, Japan
| | - A Terada
- Department of Chemical Engineering, Faculty of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo, 184-8588, Japan
| | - K Nakamura
- Graduate School of Environmental Studies, Tohoku University, 6-6-20 Aramaki-Aoba, Aoba-ward, Sendai, Miyagi, 980-8579, Japan
| | - M Nakashima
- Disaster Risk Reduction and Environment SBU, Kokusai Kogyo Co., Ltd., 2 Rokubancho, Chiyoda-ku, Tokyo, 102-0085, Japan
| | - T Komai
- Graduate School of Environmental Studies, Tohoku University, 6-6-20 Aramaki-Aoba, Aoba-ward, Sendai, Miyagi, 980-8579, Japan
| | - S Riya
- Department of Chemical Engineering, Faculty of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo, 184-8588, Japan.
| | - M Hosomi
- Department of Chemical Engineering, Faculty of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo, 184-8588, Japan
| | - H Hou
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Science, Beijing, 100000, China
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Zhou S, Yang G, Zhang M, Pienta M, Chenoweth C, Aaronson K, Fetters M, Chandanabhumma P, Hou H, Malani P, Cabrera L, Pagani F, Likosky D. Mortality Following Durable Left Ventricular Assist Device Implant by Timing and Category of First Infection. J Heart Lung Transplant 2021. [DOI: 10.1016/j.healun.2021.01.1934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Hasnain J, Jiang Y, Hou H, Yan J, Athanasopoulou L, Forth J, Ashby PD, Helms BA, Russell TP, Geissler PL. Spontaneous emulsification induced by nanoparticle surfactants. J Chem Phys 2020; 153:224705. [PMID: 33317311 DOI: 10.1063/5.0029016] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Microemulsions, mixtures of oil, water, and surfactant, are thermodynamically stable. Unlike conventional emulsions, microemulsions form spontaneously, have a monodisperse droplet size that can be controlled by adjusting the surfactant concentration, and do not degrade with time. To make microemulsions, a judicious choice of surfactant molecules must be made, which significantly limits their potential use. Nanoparticle surfactants, on the other hand, are a promising alternative because the surface chemistry needed to make them bind to a liquid-liquid interface is both well flexible and understood. Here, we derive a thermodynamic model predicting the conditions in which nanoparticle surfactants drive spontaneous emulsification that agrees quantitatively with experiments using Noria nanoparticles. This new class of microemulsions inherits the mechanical, chemical, and optical properties of the nanoparticles used to form them, leading to novel applications.
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Affiliation(s)
- J Hasnain
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Y Jiang
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - H Hou
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - J Yan
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - L Athanasopoulou
- Faculty of Mathematics and Physics, University of Ljubjana, Jadranska 19, SI-1000 Ljubjana, Slovenia
| | - J Forth
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - P D Ashby
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - B A Helms
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - T P Russell
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - P L Geissler
- Department of Chemistry, University of California Berkeley, Berkeley, California 94720, USA
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Pan SB, Wu CL, Hou H, Zhou DC, Cui X, He L, Gu J, Wang L, Yu ZF, Dong GY, Xie SX, Xiong QR, Geng XP. [Open hepatectomy versus laparoscopic in the treatment of primary left-sided hepatolithiasis: a propensity, long-term follow-up analysis at a single center]. Zhonghua Wai Ke Za Zhi 2020; 58:530-538. [PMID: 32610424 DOI: 10.3760/cma.j.cn112139-20191114-00561] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
To compare short-term and long-term efficacy after laparoscopic left hepatectomy(LLR) to open left hepatectomy(OLH) for primary left-sided hepatolithiasis. Methods: Clinical data of 187 patients with left-sided hepatolithiasis and underwent laparoscopically or open left-sided hepatectomy from October 2014 to October 2019 at the Second Affiliated Hospital of Anhui Medical University were retrospectively analyzed in this propensity score matching (PSM) study and were matched in terms of age, sex, body mass index, liver function, ASA score, comorbidities, history of biliary surgery, and smoking history on the ratio of 1∶1.There were 47 cases in each group and the mean age were (54.7±12.3)years old(range:34 to 75 years old) and (53.2±12.6) years old (range: 34 to 75 years old) in open and laparoscopically group respectively. The data of operation time, intraoperative blood loss, postoperative hospital-stay, complication rate, biliary fistula rate, stone clearance rate, and stone recurrence rate were compared. The quantitative data were compared using t-test or rank-sum test. Count data were analyzed with χ(2) test or Fisher test. Results: No significant difference was observed in the clinical characteristics of included 94 patients in this study(all P>0.05).The length of the postoperative hospital-stay after OLH was significantly higher than that in the LLH group((10.8±3.1) days vs.(8.5±2.2)days, t=4.085, P=0.000). LLR significantly decreased the incidence of postoperative biliary fistula compared with the OLH (6.3% vs.21.2%, χ(2)=4.374, P=0.036) and the rates of postoperative complications in the OLH group was significantly higher than that in the LLH group (48.9% vs.27.6%, χ(2)=4.502, P=0.034). Moreover, the stone recurrence rates in the LLH group was significantly lower than that after OLR (4.2% vs. 17.0%, χ(2)=4.029, P=0.045). OLH (95% CI: 1.55 to 10.75, P=0.004) and postoperative complications (95% CI: 1.29 to 9.52, P=0.013) were independent risk factors for prolonged hospital stay. OLH (95% CI: 1.428 to 44.080, P=0.018) and residual stones (95% CI: 1.580 to 62.379, P=0.014) were independent risk factors for the occurrence of postoperative biliary fistula. Biliary fistula (95% CI: 1.078 to 24.517, P=0.040) was an independent risk factor for the recurrence of stones. Conclusion: Compared with OLH, LLH is safe and effective for the treatment of the primary left-sided hepatolithiasis with the clinical benefits of shorter hospital stay, fewer morbidity and biliary fistula occurrence, and lower stone recurrence rates.
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Affiliation(s)
- S B Pan
- Department of Hepatobiliary and Pancreatic Surgery, Second Affiliated Hospital of Anhui Medical University, Hefei 230601, China
| | - C L Wu
- Department of Hepatobiliary and Pancreatic Surgery, Second Affiliated Hospital of Anhui Medical University, Hefei 230601, China
| | - H Hou
- Department of Hepatobiliary and Pancreatic Surgery, Second Affiliated Hospital of Anhui Medical University, Hefei 230601, China
| | - D C Zhou
- Department of Hepatobiliary and Pancreatic Surgery, Second Affiliated Hospital of Anhui Medical University, Hefei 230601, China
| | - X Cui
- Department of Hepatobiliary and Pancreatic Surgery, Second Affiliated Hospital of Anhui Medical University, Hefei 230601, China
| | - L He
- Department of Hepatobiliary and Pancreatic Surgery, Second Affiliated Hospital of Anhui Medical University, Hefei 230601, China
| | - J Gu
- Department of Hepatobiliary and Pancreatic Surgery, Second Affiliated Hospital of Anhui Medical University, Hefei 230601, China
| | - L Wang
- Department of Hepatobiliary and Pancreatic Surgery, Second Affiliated Hospital of Anhui Medical University, Hefei 230601, China
| | - Z F Yu
- Department of Hepatobiliary and Pancreatic Surgery, Second Affiliated Hospital of Anhui Medical University, Hefei 230601, China
| | - G Y Dong
- Department of Hepatobiliary and Pancreatic Surgery, Second Affiliated Hospital of Anhui Medical University, Hefei 230601, China
| | - S X Xie
- Department of Hepatobiliary and Pancreatic Surgery, Second Affiliated Hospital of Anhui Medical University, Hefei 230601, China
| | - Q R Xiong
- Department of Hepatobiliary and Pancreatic Surgery, Second Affiliated Hospital of Anhui Medical University, Hefei 230601, China
| | - X P Geng
- Department of Hepatobiliary and Pancreatic Surgery, Second Affiliated Hospital of Anhui Medical University, Hefei 230601, China
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Liu X, Liu X, Hou H, LI X. FRI0171 THE CHANGES OF IMMUNE FUNCTION AND CLINICAL INDEXES WITH SYSTEMIC LUPUS ERYTHEMATOSUS AFTER IMMUNOREGULATORY COMBINATION THERAPIES. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.5801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background:Recent studies have reported that some drugs such as low-dose interleukin-2, rapamycin, metformin, retinoic acid and coenzyme Q10 could promote the proliferation and functional recovery of regulatory T cells (Treg) in patients with autoimmune diseases. However, the effects on the balance of Treg cells and pro-inflammatory lymphocytes and long-term efficacy have rarely been reported.Objectives:To evaluate the changes of peripheral lymphocyte subsets, conventional drugs and remission rate in patients with systemic lupus erythematosus (SLE) after immunomodulatory combination therapies.Methods:A total of 189 patients with SLE from the Second Affiliated Hospital of Shanxi Medical University from January 2016 to October 2019 were enrolled, who were divided into well-controlled group and untargeted control group taking a full consideration of the patient’s symptoms, signs and related laboratory findings. We measured the absolute counts of B, NK, CD8+T and helper T 1 (Th1), helper T 2 (Th2), helper T 17 (Th17) and Treg cells in peripheral blood of patients before immunomodulatory combination therapies and during the 3 months and 6 months of follow-up and 190 sex- and age- matched control individuals using flow cytometry. Moreover, the ratios of various cells to Treg cells were calculated.Results:Compared with healthy controls, Treg cells in SLE patients were significantly lower before the treatment with immunomodulator, while the ratios of various pro-inflammatory lymphocytes to Treg cells (such as Th2/Treg, Th17/Treg, CD8+T/Treg, etc.) were higher. After 3 months and 6 months with immunomodulatory therapy, the absolute number of Treg cells in peripheral blood of SLE patients increased obviously reaching to normal level. Accordingly, the ratios of various pro-inflammatory lymphocytes to Treg cells recovered. At the same time, the dose of glucocorticoid and disease-modifying antirheumatic drugs (DMARDs) decreased distinctly. Additionally, the well-controlled group was able to maintain a high remission rate, and the untargeted control group could achieve a higher response rate after immunomodulatory treatment.Conclusion:The imbalance between pro-inflammatory lymphocytes and Treg cells caused by the significant decrease of Treg cells may be the main cause of SLE. And immunomodulatory combination therapies we came up with may reverse the imbalance of proinflammatory lymphocytes and Treg cells, which is an potential and effective treatment for SLE.References:[1]Noack M, Miossec P. Th17 and regulatory T cell balance in autoimmune and inflammatory disease[J]. Autoimmun Rev, 2014, 13(6): 668-677.[2]Yu A, Snowhite I, Vendrame F, et al. Selective IL-2 responsiveness of regulatory T cells through multiple intrinsic mechanisms supports the use of low-dose IL-2 therapy in type 1 diabetes. Diabetes. 2015;64: 2172–2183.[3]Schuiveling M, Vazirpanah N, Radstake TRDJ, Zimmermann M, Broen JCA. Metformin, A New Era for an Old Drug in the Treatment of Immune Mediated Disease?[J]. Curr Drug Targets, 2017;18:1-15.Table 1.The changes of remission rate in the no-remission group during follow-up.Follow-up periodTotal patientsRemissionNo-remissionRemission rate(%)Baseline9209203 Months72333945.8a6 Months74423256.8aa: Compared with baseline; b: Compared with 3 months.Acknowledgments:We would like to express our sincere gratitude to all our coworkers and collaborators, Jing Luo, Xiangcong Zhao, Chen Zhang, Qi Wu, Congcong Liang, and Rui Fu for their technical support.Disclosure of Interests:None declared
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Hou H, Zhang B, Huang H, Luo Y, Wu S, Tang G, Liu W, Mao L, Mao L, Wang F, Sun Z. Using IL-2R/lymphocytes for predicting the clinical progression of patients with COVID-19. Clin Exp Immunol 2020; 201:76-84. [PMID: 32365221 PMCID: PMC7267633 DOI: 10.1111/cei.13450] [Citation(s) in RCA: 99] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 04/28/2020] [Accepted: 04/28/2020] [Indexed: 12/27/2022] Open
Abstract
Effective laboratory markers for the estimation of disease severity and predicting the clinical progression of coronavirus disease-2019 (COVID-19) is urgently needed. Laboratory tests, including blood routine, cytokine profiles and infection markers, were collected from 389 confirmed COVID-19 patients. The included patients were classified into mild (n = 168), severe (n = 169) and critical groups (n = 52). The leukocytes, neutrophils, infection biomarkers [such as C-reactive protein (CRP), procalcitonin (PCT) and ferritin] and the concentrations of cytokines [interleukin (IL)-2R, IL-6, IL-8, IL-10 and tumor necrosis factor (TNF)-α] were significantly increased, while lymphocytes were significantly decreased with increased severity of illness. The amount of IL-2R was positively correlated with the other cytokines and negatively correlated with lymphocyte number. The ratio of IL-2R to lymphocytes was found to be remarkably increased in severe and critical patients. IL-2R/lymphocytes were superior compared with other markers for the identification of COVID-19 with critical illness, not only from mild but also from severe illness. Moreover, the cytokine profiles and IL-2R/lymphocytes were significantly decreased in recovered patients, but further increased in disease-deteriorated patients, which might be correlated with the outcome of COVID-19. Lymphopenia and increased levels of cytokines were closely associated with disease severity. The IL-2R/lymphocyte was a prominent biomarker for early identification of severe COVID-19 and predicting the clinical progression of the disease.
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Affiliation(s)
- H Hou
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - B Zhang
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - H Huang
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Y Luo
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - S Wu
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - G Tang
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - W Liu
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - L Mao
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - L Mao
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - F Wang
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Z Sun
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Abstract
Cancer stem cells (CSCs) are responsible for the unrestrained cell growth and chemo-resistance of malignant tumors. Reports about miR-33a in different type of cancer are limited, and it remains elusive whether there is a link between miR-33a and chemo-resistance of CSCs. Here we report that Lgr5+ hepatocellular carcinoma (HCC) cells from primary tissues and cell lines behave similarly to CSCs and are chemo-resistant to doxorubicin. Significantly, reduced miR-33a expression is associated with the chemo-resistance of Lgr5+ HCC-CSCs, accompanied by an overexpression of ABCA1 which is identified as target of miR-33a by mainly using miRNA luciferase assay and western-blotting. We demonstrate that down-regulation of miR-33a expression directly contributes to chemo-resistance of Lgr5+ HCC-CSCs, and restoring miR-33a expression sensitizes them to doxorubicin via apoptosis by mainly using TUNEL assay, soft agar colony formation assay and xenograft assay. Additionally, reduced miR-33a expression in HCC tissues is associated with chemo-response and poor patient survival, which suggests the therapeutic potential of miR-33a. In conclusion, our work indicates that ectopic miR-33a expression sensitizes Lgr5+ HCC-CSCs to doxorubicin via direct targeting ABCA1, which sheds new light on understanding the mechanism of chemo-resistance in HCC-CSCs and contributes to development of potential therapeutics against HCC.
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Xu W, Ding Y, Huang R, Zhu Z, Fong H, Hou H. High-performance polyimide nanofibers reinforced polyimide nanocomposite films fabricated by co-electrospinning followed by hot-pressing. J Appl Polym Sci 2018. [DOI: 10.1002/app.46849] [Citation(s) in RCA: 22] [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] [Indexed: 11/09/2022]
Affiliation(s)
- W. Xu
- College of Chemistry and Chemical Engineering; Jiangxi Normal University; Nanchang Jiangxi 330022 China
- Program of Biomedical Engineering, South Dakota School of Mines & Technology; Rapid City South Dakota 57701
| | - Y. Ding
- Program of Biomedical Engineering, South Dakota School of Mines & Technology; Rapid City South Dakota 57701
| | - R. Huang
- College of Chemistry and Chemical Engineering; Jiangxi Normal University; Nanchang Jiangxi 330022 China
| | - Z. Zhu
- Program of Biomedical Engineering, South Dakota School of Mines & Technology; Rapid City South Dakota 57701
| | - H. Fong
- Program of Biomedical Engineering, South Dakota School of Mines & Technology; Rapid City South Dakota 57701
| | - H. Hou
- College of Chemistry and Chemical Engineering; Jiangxi Normal University; Nanchang Jiangxi 330022 China
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Jiang M, Zhou N, Liu D, Hou H, Cong J, Zhang C, Zhang X. P3.03-018 Tumor Cavitation in Lung Metastases in Patients with Solid Tumor Treated with Apatinib. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.1645] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Zhou N, Lv H, Zhang C, Li T, Zhu J, Jiang M, Hou H, Liu D, Li A, Liu G, Liu K, Zhang G, Zhang X. P1.01-069 Clinical Experience with IBM Watson for Oncology (WFO) Cognitive System for Lung Cancer Treatment in China. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.723] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Liu D, Hou H, Zhou N, Jiang M, Cong J, Zhang C, Li T, Lv H, Zhu J, Hao C, Liu K, Zhang X. P1.01-042 Dynamic ctDNA Assay by Next Generation Sequencing to Guide Targeted Therapy in Advanced Non-Small Cell Lung Cancer. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Min L, Hall K, Finlayson E, Englesbe M, Palazzolo W, Hou H, Miller A, Diehl K. THE VESPA PRE-OPERATIVE TOOL: A SCALE THAT PREDICTS POST-SURGICAL GENERAL AND GERIATRIC COMPLICATIONS. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.3326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- L. Min
- University of Michigan, Department of Internal Medicine, Division of Geriatric and Palliative Medicine, Ann Arbor, Michigan,
- VA Ann Arbor Healthcare System and the Geriatric Research Education Clinical Center (GRECC), Ann Arbor, Michigan,
| | - K. Hall
- University of Michigan, Department of Internal Medicine, Division of Geriatric and Palliative Medicine, Ann Arbor, Michigan,
- VA Ann Arbor Healthcare System and the Geriatric Research Education Clinical Center (GRECC), Ann Arbor, Michigan,
| | - E. Finlayson
- University of California, San Francisco, San Francisco, California,
| | - M. Englesbe
- University of Michigan, Departments of Surgery, Ann Arbor, Michigan,
| | - W. Palazzolo
- University of Michigan, Departments of Surgery, Ann Arbor, Michigan,
| | - H. Hou
- University of Michigan, Urology, Ann Arbor, Michigan,
| | - A. Miller
- Massachusetts Eye and Ear Infirmary / Harvard Combined Otolaryngology, Boston, Massachusetts
| | - K. Diehl
- University of Michigan, Departments of Surgery, Ann Arbor, Michigan,
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Hu C, Chen Z, Chen Y, Hou H, Chen X, Cao Z, Shi H. Analysis of outcomes of fertility restoration surgery in women with infertility secondary to tubal pregnancy: a series of 77 cases. CLIN EXP OBSTET GYN 2017. [DOI: 10.12891/ceog3274.2017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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Hu C, Chen Z, Chen Y, Hou H, Chen X, Cao Z, Shi H. Analysis of outcomes of fertility restoration surgery in women with infertility secondary to tubal pregnancy: a series of 77 cases. CLIN EXP OBSTET GYN 2017; 44:195-199. [PMID: 29746021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
PURPOSE To assess pregnancy outcomes after minimally-invasive fertility restoration surgery in women with infertility secondary to tubal pregnancy treated with salpingectomy. MATERIALS AND METHODS The study included 77 women diagnosed with infertility after salpingectomy for tubal pregnancy between December 2008 and October 2010 for intraoperative assessment and treatment of tubal and pelvic adhesions. The mean age of the patients was 31.12 ± 3.58 years and their duration of infertility was 3.91 ± 2.80 years. Chi-square test, Student's t-test, rank-sum test, and Kaplan-Meier test was used. A p-value < 0.05 was considered significant. RESULTS Tubal function was restored in 68.8% of women, 33.77% experienced intrauterine conception, 32.47% had a live birth, 5.19% had an ectopic pregnancy, and 1.30% had a spontaneous abortion within the three-year follow up period. CONCLUSIONS Minimally-invasive fertility restoration surgery after tubal pregnancy treated with salpingectomy restored tubal function in the contralateral fallopian tube in the majority of women.
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Hou H, Khan N, Kuppusamy P. Measurement of pO2 in a Pre-clinical Model of Rabbit Tumor Using OxyChip, a Paramagnetic Oxygen Sensor. Advances in Experimental Medicine and Biology 2017; 977:313-318. [DOI: 10.1007/978-3-319-55231-6_41] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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Jarvis L, Williams B, Schaner P, Chen E, Angeles C, Hou H, Schreiber W, Wood V, Flood A, Swartz H, Kuppusamy P. Phase 1 Clinical Trial of OxyChip, an Implantable Absolute pO2 Sensor for Tumor Oximetry. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.268] [Citation(s) in RCA: 13] [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] [Indexed: 11/27/2022]
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Hou H, Khan N, Nagane M, Gohain S, Chen EY, Jarvis LA, Schaner PE, Williams BB, Flood AB, Swartz HM, Kuppusamy P. Skeletal Muscle Oxygenation Measured by EPR Oximetry Using a Highly Sensitive Polymer-Encapsulated Paramagnetic Sensor. Adv Exp Med Biol 2016; 923:351-357. [PMID: 27526163 DOI: 10.1007/978-3-319-38810-6_46] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
We have incorporated LiNc-BuO, an oxygen-sensing paramagnetic material, in polydimethylsiloxane (PDMS), which is an oxygen-permeable, biocompatible, and stable polymer. We fabricated implantable and retrievable oxygen-sensing chips (40 % LiNc-BuO in PDMS) using a 20-G Teflon tubing to mold the chips into variable shapes and sizes for in vivo studies in rats. In vitro EPR measurements were used to test the chip's oxygen response. Oxygen induced linear and reproducible line broadening with increasing partial pressure (pO2). The oxygen response was similar to that of bare (unencapsulated) crystals and did not change significantly on sterilization by autoclaving. The chips were implanted in rat femoris muscle and EPR oximetry was performed repeatedly (weekly) for 12 weeks post-implantation. The measurements showed good reliability and reproducibility over the period of testing. These results demonstrated that the new formulation of OxyChip with 40 % LiNc-BuO will enable the applicability of EPR oximetry for long-term measurement of oxygen concentration in tissues and has the potential for clinical applications.
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Affiliation(s)
- H Hou
- Department of Radiology, Geisel School of Medicine at Dartmouth, Hanover, NH, 03755, USA.
| | - N Khan
- Department of Radiology, Geisel School of Medicine at Dartmouth, Hanover, NH, 03755, USA
| | - M Nagane
- Department of Radiology, Geisel School of Medicine at Dartmouth, Hanover, NH, 03755, USA
| | - S Gohain
- Department of Radiology, Geisel School of Medicine at Dartmouth, Hanover, NH, 03755, USA
| | - E Y Chen
- Department of Surgery, Geisel School of Medicine at Dartmouth, Hanover, NH, 03755, USA
| | - L A Jarvis
- Department of Medicine, Geisel School of Medicine at Dartmouth, Hanover, NH, 03755, USA
| | - P E Schaner
- Department of Medicine, Geisel School of Medicine at Dartmouth, Hanover, NH, 03755, USA
| | - B B Williams
- Department of Radiology, Geisel School of Medicine at Dartmouth, Hanover, NH, 03755, USA.,Department of Medicine, Geisel School of Medicine at Dartmouth, Hanover, NH, 03755, USA
| | - A B Flood
- Department of Radiology, Geisel School of Medicine at Dartmouth, Hanover, NH, 03755, USA
| | - H M Swartz
- Department of Radiology, Geisel School of Medicine at Dartmouth, Hanover, NH, 03755, USA.,Department of Medicine, Geisel School of Medicine at Dartmouth, Hanover, NH, 03755, USA
| | - P Kuppusamy
- Department of Radiology, Geisel School of Medicine at Dartmouth, Hanover, NH, 03755, USA. .,Department of Medicine, Geisel School of Medicine at Dartmouth, Hanover, NH, 03755, USA. .,Department of Radiology, EPR Center for the Study of Viable Systems, Geisel School of Medicine at Dartmouth, One Medical Center Drive, Lebanon, NH, 03766, USA.
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Sun D, Li X, Ma M, Liu J, Xu Y, Ye L, Hou H, Wang C, Li X, Jiang Y. The predictive value and potential mechanisms of miRNA-328 and miRNA-378 for brain metastases in operable and advanced non-small-cell lung cancer. Jpn J Clin Oncol 2015; 45:464-73. [DOI: 10.1093/jjco/hyv009] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Accepted: 01/09/2015] [Indexed: 01/04/2023] Open
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Deng ZD, Lu J, Myjak MJ, Martinez JJ, Tian C, Morris SJ, Carlson TJ, Zhou D, Hou H. Design and implementation of a new autonomous sensor fish to support advanced hydropower development. Rev Sci Instrum 2014; 85:115001. [PMID: 25430138 DOI: 10.1063/1.4900543] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Acceleration in development of additional conventional hydropower requires tools and methods to perform laboratory and in-field validation of turbine performance and fish passage claims. The new-generation Sensor Fish has been developed with more capabilities to accommodate a wider range of users over a broader range of turbine designs and operating environments. It provides in situ measurements of three-dimensional (3D) linear accelerations, 3D rotational velocities, 3D orientation, pressure, and temperature at a sampling frequency of 2048 Hz. It also has an automatic floatation system and built-in radio-frequency transmitter for recovery. The relative errors of the pressure, acceleration, and rotational velocity were within ±2%, ±5%, and ±5%, respectively. The accuracy of orientation was within ±4° and accuracy of temperature was ±2 °C. The new-generation Sensor Fish is becoming a major technology and being deployed for evaluating the conditions for fish passage of turbines or other hydraulic structures in both the United States and several other countries.
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Affiliation(s)
- Z D Deng
- Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99332, USA
| | - J Lu
- Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99332, USA
| | - M J Myjak
- Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99332, USA
| | - J J Martinez
- Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99332, USA
| | - C Tian
- Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99332, USA
| | - S J Morris
- Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99332, USA
| | - T J Carlson
- Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99332, USA
| | - D Zhou
- Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99332, USA
| | - H Hou
- Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99332, USA
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St-Pierre J, Rioux-Masse B, Hou H, Savard P, Luong ML. A 58-Year-Old Renal Transplant Recipient With Fever and Progressive Dyspnea. Clin Infect Dis 2014. [DOI: 10.1093/cid/ciu164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Eston M, Hou H, Pollard R, Kane S. Feasibility and Outcomes of Total Laparoscopic Hysterectomy in Patients with Obesity versus Morbid Obesity. J Minim Invasive Gynecol 2014. [DOI: 10.1016/j.jmig.2013.12.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Hou H, Sun L, Siddoway B, Petralia R, Yang H, Gu H, Nairn A, Xia H. Synaptic NMDA receptor stimulation activates PP1 by inhibiting its phosphorylation by Cdk5. J Gen Physiol 2013. [DOI: 10.1085/jgp.1426oia46] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Hou H, Yao N, Li JN, Wei Y, Zhao L, Zhang J, Li FS. Migration and leaching risk of extraneous antimony in three representative soils of China: lysimeter and batch experiments. Chemosphere 2013; 93:1980-1988. [PMID: 23931906 DOI: 10.1016/j.chemosphere.2013.07.017] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2013] [Revised: 07/02/2013] [Accepted: 07/06/2013] [Indexed: 06/02/2023]
Abstract
Antimony (Sb) distribution, solubility and mobility onto natural soils of China were studied in lysimeter and batch experiments as a function of physicochemical properties of the soil. An outdoor lysimeter experiment investigated the leaching and migration of Sb in the soils with Sb-polluted topsoil and unpolluted subsoil over a 5month period. Soil solutions were collected by suction cups installed at different depth of lysimeters, and leachates were regularly collected and analyzed for Sb concentrations. The majority of the added Sb was retained in the topsoil layers, but small portions were moved to the sub-layers. Sb concentrations in the soil solutions and leachates ranged from 0-755.5 (6.38±54 on average) μg l(-1) and 0-0.45 (smaller than the detection limit) μg l(-1) respectively, indicating the low solubility of Sb in the soils. Batch experiments were performed in order to determine the sorption capacity and the partition coefficient (Kd). Freundlich isotherm described properly the equilibrium experimental data and results show that the Kd values for Primosol, Isohumosol, Ferrosol equal to 22.5, 87.8, 704 L kg(-1), respectively. These results showed the strong capacity of the soils to retain Sb, and prevent it being leached down the profile. The mobilizable Sb was in the order: Primosol>Isohumosol>Ferrosol. Sb migration in the soils was mainly associated with the exchangeable, carbonate-bound, and metal-organic complex-bound fractions. Health risk assessment indicates that Sb leaching from Ferrosol will not harm to human health through groundwater under the test conditions, while it has certain health risks from the Isohumosol and Primosol.
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Affiliation(s)
- H Hou
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Dayangfang 8, Beijing 100012, PR China.
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Swartz H, Williams B, Jarvis L, Chen E, Schaner P, Hou H, Khan N, Zaki B, Gladstone D. Repeated Direct Measurements of Tumor Oxygen to Determine the Therapeutic Potential of Hyperoxic Therapy. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.1745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Pang Q, Wang P, Wang J, Zhao L, Yuan Z, Wang W, Sun J, Hou H. PO-0743 EGFR TKIS COMBINED WITH DEFINITE RADIOTHERAPY FOR STAGE IV NON-SMALL CELL LUNG CANCER WITH BONE-ONLY METASTASES. Radiother Oncol 2012. [DOI: 10.1016/s0167-8140(12)71076-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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33
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Chen H, Hua Q, Hou H. Association of haemoglobin with ambulatory arterial stiffness index in untreated essential hypertensive patients without anaemia. Heart 2011. [DOI: 10.1136/heartjnl-2011-300867.593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Williams B, Jarvis L, Chen E, Hou H, Zaki B, Gladstone D, Hartford A, Swartz H. Translational Development of EPR Oximetry for Assessment of Tumor Hypoxia. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.1309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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35
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Shul RJ, Baca AG, Rieger DJ, Hou H, Pearton SJ, Ren F. Ecr Etching of GaP, GaAs, InP, and InGaAs in Cl2/Ar, Cl2/N2, BCl3/Ar, and BCl3/N2. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-421-245] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
AbstractElectron cyclotron resonance (ECR) etching of GaP, GaAs, InP, and InGaAs are reported as a function of percent chlorine-containing gas for Cl2/Ar, Cl2/N2, BCl3/Ar, and BCl3/N2 plasma chemistries. GaAs and GaP etch rates were faster than InP and InGaAs, independent of plasma chemistry due to the low volatility of the InClx, etch products. GaAs and GaP etch rates increased as %Cl2 was increased for Cl2/Ar and Cl2/N2 plasmas. The GaAs and GaP etch rates were much slower in BCl3-based plasmas due to lower concentrations of reactive Cl, however enhanced etch rates were observed in BCl3/N2 at 75% BCl3. Smooth etched surfaces were obtained over a wide range of plasma chemistries.
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Chen X, He D, Hou H, Wang M, He H, Yang Z, Xing J, Nan X. UP-1.109: Clinical Analysis of Transrectal Ultrasound Guided Needle Biopsies of the Prostate in 540 Patients. Urology 2009. [DOI: 10.1016/j.urology.2009.07.556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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37
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Zhang C, Huang L, Qu S, Yin W, Cai M, Li Q, Hou H. Abstract: P211 EFFECTS OF NO-1886 ON INFLAMMATION-ASSOCIATED CYTOKINES IN HIGH-FAT/HIGH-SUCROSE/HIGH-CHOLESTEROL DIET-FED MINIATURE PIGS. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)70518-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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38
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Ibragimova MI, Petukhov VY, Zheglov EP, Khan N, Hou H, Swartz HM, Konjukhov GV, Nizamov RN. Quinoid radio-toxin (QRT) induced metabolic changes in mice: an ex vivo and in vivo EPR investigation. Nitric Oxide 2008; 18:216-22. [PMID: 18230367 DOI: 10.1016/j.niox.2008.01.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2007] [Revised: 01/11/2008] [Accepted: 01/13/2008] [Indexed: 11/15/2022]
Abstract
Radio-toxins are toxic metabolites produced by ionizing irradiation and have toxic effects similar to those caused by direct irradiation. We have investigated the effect of a quinoid radio-toxin (QRT) obtained from gamma-irradiated potato tuber on various organs in mice using ex vivo and in vivo EPR spectroscopy. Results indicate a decrease in the activity of ribonucleotide reductase enzyme in spleen of mice treated with 0.2mg QRT. A dose of 2mg QRT was fatal to mice within 45-60 min of treatment. Nitrosyl hemoglobin complexes alpha-(Fe(2+)-NO)alpha-(Fe(2+))beta-(Fe(2+))(2) were detected from spleen, blood, liver, kidney, heart, and lung tissue samples of mice treated with lethal doses of QRT. A significant decrease of pO(2) in liver and brain was observed after administration of QRT at the lethal dose. The time of the appearance of the nitrosyl hemoglobin complex and its intensity varied with the dose of QRT and the type of tissue. These results indicate that the effect of the QRT is more prominent in spleen and to a lesser extent in liver and blood. The QRT action at the lethal doses resulted in an increased hypoxia over time with disruption of compensatory adaptive response. The results indicate similar outcome of QRT as observed with gamma-irradiation.
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Affiliation(s)
- M I Ibragimova
- Kazan Physical-Technical Institute, Laboratory of Radiation Chemistry and Radiobiology, Sibirskii Trakt 10/7, Kazan 420029, Russia.
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Yang Z, Luo H, Wang H, Hou H. Preparative Isolation of Bufalin and Cinobufagin from Chinese Traditional Medicine ChanSu. J Chromatogr Sci 2008; 46:81-5. [DOI: 10.1093/chromsci/46.1.81] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Obregon D, Hou H, Bai Y, Nikolic WV, Mori T, Luo D, Zeng J, Ehrhart J, Fernandez F, Morgan D, Giunta B, Town T, Tan J. CD40L disruption enhances Abeta vaccine-mediated reduction of cerebral amyloidosis while minimizing cerebral amyloid angiopathy and inflammation. Neurobiol Dis 2007; 29:336-53. [PMID: 18055209 DOI: 10.1016/j.nbd.2007.09.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2007] [Revised: 08/31/2007] [Accepted: 09/19/2007] [Indexed: 12/24/2022] Open
Abstract
Amyloid-beta (Abeta) immunization efficiently reduces amyloid plaque load and memory impairment in transgenic mouse models of Alzheimer's disease (AD). Active Abeta immunization has also yielded favorable results in a subset of AD patients. However, a small percentage of patients developed severe aseptic meningoencephalitis associated with brain inflammation and infiltration of T-cells. We have shown that blocking the CD40-CD40 ligand (L) interaction mitigates Abeta-induced inflammatory responses and enhances Abeta clearance. Here, we utilized genetic and pharmacologic approaches to test whether CD40-CD40L blockade could enhance the efficacy of Abeta(1-42) immunization, while limiting potentially damaging inflammatory responses. We show that genetic or pharmacologic interruption of the CD40-CD40L interaction enhanced Abeta(1-42) immunization efficacy to reduce cerebral amyloidosis in the PSAPP and Tg2576 mouse models of AD. Potentially deleterious pro-inflammatory immune responses, cerebral amyloid angiopathy (CAA) and cerebral microhemorrhage were reduced or absent in these combined approaches. Pharmacologic blockade of CD40L decreased T-cell neurotoxicity to Abeta-producing neurons. Further reduction of cerebral amyloidosis in Abeta-immunized PSAPP mice completely deficient for CD40 occurred in the absence of Abeta immunoglobulin G (IgG) antibodies or efflux of Abeta from brain to blood, but was rather correlated with anti-inflammatory cytokine profiles and reduced plasma soluble CD40L. These results suggest CD40-CD40L blockade promotes anti-inflammatory cellular immune responses, likely resulting in promotion of microglial phagocytic activity and Abeta clearance without generation of neurotoxic Abeta-reactive T-cells. Thus, combined approaches of Abeta immunotherapy and CD40-CD40L blockade may provide for a safer and more effective Abeta vaccine.
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Affiliation(s)
- D Obregon
- Neuroimmunology Laboratory, Institute for Research in Psychiatry, Department of Psychiatry and Behavioral Medicine, USA
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Abramovic Z, Sentjurc M, Kristl J, Khan N, Hou H, Swartz HM. Influence of different anesthetics on skin oxygenation studied by electron paramagnetic resonance in vivo. Skin Pharmacol Physiol 2006; 20:77-84. [PMID: 17143012 DOI: 10.1159/000097654] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2006] [Accepted: 08/21/2006] [Indexed: 11/19/2022]
Abstract
The effects of two general anesthetics on skin oxygenation in mice are evaluated by electron paramagnetic resonance oximetry. Up to now no data on the effects of different anesthetics on skin oxygenation could be found. In this study animals were anesthetized with ketamine/xylazine or isoflurane, and partial pressure of oxygen (pO(2)) in the skin, heart rate and hemoglobin oxygen saturation were followed as a function of time and inhaled oxygen concentration. The skin pO(2) significantly increased continuously for about 60 min in mice anesthetized with isoflurane and remained constant after that. During ketamine/xylazine anesthesia, the pO(2) in the skin only slightly decreased. The skin pO(2) increased with higher inspired oxygen concentrations for both anesthetics groups. When breathing 21% oxygen, mice anesthetized with isoflurane had two-fold higher pO(2) in the skin compared to mice anesthetized with ketamine/xylazine. The heart rate was significantly lower in animals anesthetized with ketamine/xylazine, while hemoglobin saturation was almost the same in both groups at all inhaled oxygen concentrations. These results show that the type of anesthesia is an important parameter that needs to be considered in experiments where skin pO(2) is followed.
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Affiliation(s)
- Z Abramovic
- Laboratory for Biophysics, Jozef Stefan Institute, Ljubljana, Slovenia.
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43
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Abstract
The photodegradation of organic azo dye C.I. Food Yellow 4 (FY-4) in aqueous solution was achieved, without the addition of oxidants, by 172 nm vacuum ultraviolet (VUV) radiation emitted from the planar Xe-excimer lamp. The degradation was mainly attributed to the impact of HO radicals produced by water absorbing VUV radiation. The dye decolorization followed pseudo-first order kinetics. The initial quantum yields of FY-4 decolorization in O2-saturated solution and N2-saturated solution were respectively 0.151 +/- 0.003 and 0.103 +/- 0.002. Dissolved oxygen in the solution contributed to the increase of the decolorization rate and chemical oxygen demand (COD) removal rate while KCI added as HO radical scavenger decreased the efficiency of the decolorization and COD removal. It was found from the change of the UV-Vis spectra that the degradation of FY-4 was accompanied by both the cleavage of chromophoric group and the opening of aromatic ring. Major intermediates detected were aromatic compounds, some low molecular weight by-products and several organic acids and inorganic ions.
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Affiliation(s)
- X Feng
- Institute for Electric Light Sources, Fudan University, Shanghai 200433, PR China
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Dinguizli M, Jeumont S, Beghein N, He J, Walczak T, Lesniewski PN, Hou H, Grinberg OY, Sucheta A, Swartz HM, Gallez B. Development and evaluation of biocompatible films of polytetrafluoroethylene polymers holding lithium phthalocyanine crystals for their use in EPR oximetry. Biosens Bioelectron 2006; 21:1015-22. [PMID: 16368480 DOI: 10.1016/j.bios.2005.03.009] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2005] [Revised: 03/18/2005] [Accepted: 03/18/2005] [Indexed: 11/17/2022]
Abstract
Electron paramagnetic resonance (EPR) oximetry is a powerful technology that allows the monitoring of oxygenation in tissues. The measurement of tissue oxygenation can be achieved using lithium phthalocyanine (LiPc) crystals as oxygen reporters. In order to have biocompatibility for the sensing system and to assure long-term stability in the responsiveness of the system, we developed films of Teflon AF 2400 with embedded LiPc crystals. These systems can be used as retrievable inserts or parts of an implantable resonator or catheter. Atomic force microscopy studies revealed that the surface of the films was regular and planar. The response to oxygen of the sensor (EPR linewidth as a function of pO(2)) remained unchanged after implantation in mice, and was not affected by sterilization or irradiation. The use of resonators, holding LiPc embedded in Teflon AF 2400, implanted in the gastrocnemius muscle of rabbits allowed the monitoring of oxygen during several weeks. Several assays also demonstrated the biocompatibility of the system: (1) no hemolytic effect was noted; (2) no toxicity was found using the systemic injection test of extracts; (3) histological analysis in rabbit muscle in which the films were implanted for 1 week or 3 months was similar to standard polyethylene biocompatible devices. These advanced oxygen sensors are promising tools for future pre-clinical and clinical developments of EPR oximetry. These developments can be applied for other applications of biosensors where there is a need for oxygen permeable membranes.
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Affiliation(s)
- M Dinguizli
- Biomedical Magnetic Resonance Unit, Laboratory of Medicinal Chemistry and Radiopharmacy, Université Catholique de Louvain, Brussels, Belgium
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Gould LJ, Mushkudiani J, Hou H, Grinberg OY, Grinberg S, Swartz HM. 109 Use of EPR Spectroscopy to Measure Tissue Oxygen in an Ischemic Flap Model. Wound Repair Regen 2004. [DOI: 10.1111/j.1067-1927.2004.0abstractdc.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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46
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Hou H, Chang K. Science and Technology of Tofu Making. Food Science and Technology 2003. [DOI: 10.1201/9780203912911.pt7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Towner RA, Sturgeon SA, Khan N, Hou H, Swartz HM. In vivo assessment of nodularin-induced hepatotoxicity in the rat using magnetic resonance techniques (MRI, MRS and EPR oximetry). Chem Biol Interact 2002; 139:231-50. [PMID: 11879814 DOI: 10.1016/s0009-2797(02)00002-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Acute nodularin-induced hepatotoxicity was assessed in vivo, in rats using magnetic resonance (MR) techniques, including MR imaging (MRI), MR spectroscopy (MRS), and electron paramagnetic resonance (EPR) oximetry. Nodularin is a cyclic hepatotoxin isolated from the cyanobacterium Nodularia spumigena. Three hours following the intraperitoneal (i.p.) administration of nodularin (LD50), a region of 'damage', characterized by an increase in signal intensity, was observed proximal to the porta hepatis (PH) region in T2-weighted MR images of rat liver. Image analysis of these regions of apparent 'damage' indicated a statistically significant increase in signal intensity around the PH region following nodularin administration, in comparison with controls and regions peripheral to the PH region. An increase in signal intensity was also observed proximal to the PH region in water chemical shift selective images (CSSI) of nodularin-treated rat livers, indicating that the increased signal observed by MRI is an oedematous response to the toxin. Microscopic assessment (histology and electron microscopy) and serum liver enzyme function tests (aminotransferase (ALT) and aspartate ALT (AST)) confirmed the nodularin-induced tissue injury observed by MRI. In vivo and in vitro MRS was used to detect alterations in metabolites, such as lipids, Glu+Gln, and choline, during the hepatotoxic response (2-3 h post-exposure). Biochemical assessment of perchloric acid extracts of nodularin-treated rat livers were used to confirm the MRS results. In vivo EPR oximetry was used to monitor decreasing hepatic pO2 (approximately 2-fold from controls) 2-3 h following nodularin exposure. In vivo MR techniques (MRI, MRS and EPR oximetry) are able to highlight effects that may not have been evident in single end point studies, and are ideal methods to follow tissue injury progression in longitudinally, increasing the power of a study through repeated measures, and decreasing the number of animals to perform a similar study using histological or biochemical techniques.
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Affiliation(s)
- Rheal A Towner
- Department of Physiology and Pharmacology, North Queensland Magnetic Resonance Centre, School of Biomedical and Molecular Sciences, James Cook University, Molecular Sciences Building, Townsville, Qld., Australia.
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Razani B, Engelman JA, Wang XB, Schubert W, Zhang XL, Marks CB, Macaluso F, Russell RG, Li M, Pestell RG, Di Vizio D, Hou H, Kneitz B, Lagaud G, Christ GJ, Edelmann W, Lisanti MP. Caveolin-1 null mice are viable but show evidence of hyperproliferative and vascular abnormalities. J Biol Chem 2001; 276:38121-38. [PMID: 11457855 DOI: 10.1074/jbc.m105408200] [Citation(s) in RCA: 820] [Impact Index Per Article: 35.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Caveolin-1 is the principal structural protein of caveolae membranes in fibroblasts and endothelia. Recently, we have shown that the human CAV-1 gene is localized to a suspected tumor suppressor locus, and mutations in Cav-1 have been implicated in human cancer. Here, we created a caveolin-1 null (CAV-1 -/-) mouse model, using standard homologous recombination techniques, to assess the role of caveolin-1 in caveolae biogenesis, endocytosis, cell proliferation, and endothelial nitric-oxide synthase (eNOS) signaling. Surprisingly, Cav-1 null mice are viable. We show that these mice lack caveolin-1 protein expression and plasmalemmal caveolae. In addition, analysis of cultured fibroblasts from Cav-1 null embryos reveals the following: (i) a loss of caveolin-2 protein expression; (ii) defects in the endocytosis of a known caveolar ligand, i.e. fluorescein isothiocyanate-albumin; and (iii) a hyperproliferative phenotype. Importantly, these phenotypic changes are reversed by recombinant expression of the caveolin-1 cDNA. Furthermore, examination of the lung parenchyma (an endothelial-rich tissue) shows hypercellularity with thickened alveolar septa and an increase in the number of vascular endothelial growth factor receptor (Flk-1)-positive endothelial cells. As predicted, endothelial cells from Cav-1 null mice lack caveolae membranes. Finally, we examined eNOS signaling by measuring the physiological response of aortic rings to various stimuli. Our results indicate that eNOS activity is up-regulated in Cav-1 null animals, and this activity can be blunted by using a specific NOS inhibitor, nitro-l-arginine methyl ester. These findings are in accordance with previous in vitro studies showing that caveolin-1 is an endogenous inhibitor of eNOS. Thus, caveolin-1 expression is required to stabilize the caveolin-2 protein product, to mediate the caveolar endocytosis of specific ligands, to negatively regulate the proliferation of certain cell types, and to provide tonic inhibition of eNOS activity in endothelial cells.
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Affiliation(s)
- B Razani
- Department of Molecular Pharmacology and The Albert Einstein Cancer Center, The Albert Einstein College of Medicine, Bronx, New York 10461, USA
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Salahshor S, Hou H, Diep CB, Loukola A, Zhang H, Liu T, Chen J, Iselius L, Rubio C, Lothe RA, Aaltonen L, Sun XF, Lindmark G, Lindblom A. A germline E-cadherin mutation in a family with gastric and colon cancer. Int J Mol Med 2001; 8:439-43. [PMID: 11562785 DOI: 10.3892/ijmm.8.4.439] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Inactivating mutations have been found in the cell-cell adhesion molecule E-cadherin (CDH1), which acts as a tumor suppressor gene in different kinds of cancers, e.g. primarily diffuse gastric cancer and lobular breast cancer. In this study, we screened for germline alterations in familial gastric and colon cancer cases. In total, 20 gastric and 18 colon cancer patients with both familial gastric and colon cancer were tested for germline E-cadherin alterations by using PCR/SSCP, specific restriction digestion test and sequencing. No pathogenic mutations were identified in the gastric cancer patients. In two colon cancer patients, a missense mutation in exon 12, codon 592 (Ala592Thr) was found. This alteration segregated with diffuse gastric cancer and colon cancer in one of the families. The prevalence of this alteration in the general population and colon cancer cases was almost the same. However, the fact that this alteration (Ala592Thr) segregated with colon cancer and diffuse gastric cancer in one big family, suggests that this E-cadherin missense alteration, beside predisposing to diffuse gastric cancer, also may play a role in colorectal carcinogenesis.
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Affiliation(s)
- S Salahshor
- Department of Molecular Medicine, Karolinska Institute, S-171 76 Stockholm, Sweden
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Hou J, Zheng G, Jiang J, Liu X, Hou H. [Purification feasibility of malodorous waste gas contained H2S and CS2 by DBD technique]. Huan Jing Ke Xue 2001; 22:12-6. [PMID: 11769217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
Dielectric barrier discharge(DBD) technique was applied to remove H2S and CS2 in industrial waste gas. In the research of laboratory, when the voltage between two electrodes was 12 kV, 4 x 10(3) Pa H2S was discharged in air for 5 seconds, about 100% of H2S was transformed into H2O and SO2; 1.33 x 10(3) Pa CS2 was discharged in air for 15 seconds, about 80% of CS2 was transformed into CO2, CO and SO2. When the concentration of H2S and CS2 increased, the decomposition of them decreased. Based on the results, a DBD purification apparatus which can dispose 420 m3/h, 10 m/s waste gas was designed and manufactured, the removal rate of H2S can reach 89% and the energy consumption was 5.2 W.h/m3. It was concluded that the DBD technique is worth disposing malodorous industrial waste gases contained H2S and CS2.
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Affiliation(s)
- J Hou
- Institute of Environmental Science, Fudan University, Shanghai 200433, China.
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