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Wang L, Lai B, Ran X, Tang H, Cao D. A portable smartphone platform utilizing dual-sensing signals for visual determination of semicarbazide in food samples. J Mater Chem B 2024; 12:3469-3480. [PMID: 38506072 DOI: 10.1039/d4tb00001c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
Semicarbazide (SEM) is a metabolite of antibiotic nitrofurazone and a food contaminant in food production, showing potential carcinogenic, mutagenic, teratogenic, and toxic effects on human health. It is urgent to develop a highly efficient and sensitive assay for visual detection of SEM. In this paper, a pyrrolopyrrole cyanine fluorescent probe (PPCy-1) was reported for visualization and quantitative analysis of SEM through a chromophore reaction sensing mechanism for the first time. The probe towards SEM exhibited a fast response (10 min), a low detection limit (0.18 μM), high selectivity, and distinct dual ratiometric fluorescence turn-on and colorimetric modes. Its practicability was further verified by detecting SEM in meat, water, and honey samples with satisfactory recovery values. More importantly, a smartphone-assisted portable testing platform was constructed based on a PPCy-1-immobilized test paper or a polyamide thin film with a color scanning APP for real-time and on-site detection of SEM. This work provides low-cost, convenient, and rapid assays for visual SEM detection, which have potential applications in food safety monitoring.
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Affiliation(s)
- Lingyun Wang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, Guangzhou, 510641, China.
| | - Bihong Lai
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, Guangzhou, 510641, China.
| | - Xueguang Ran
- Institute of Animal Science, Guangdong Academy of Agricultural Sciences, State Key Laboratory of Swine and Poultry Breeding Industry, 510641, China
| | - Hao Tang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, Guangzhou, 510641, China.
| | - Derong Cao
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, Guangzhou, 510641, China.
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Zhong Q, Zhong Q, Lai B. Infantile neuroaxonal dystrophy causing iron deposition in the bilateral globus pallidus. QJM 2024; 117:137-138. [PMID: 37758252 DOI: 10.1093/qjmed/hcad217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Indexed: 10/03/2023] Open
Affiliation(s)
- Q Zhong
- Department of Neurology, Ganzhou People's Hospital, Ganzhou Hospital-Nanfang Hospital, Southern Medical University, Ganzhou, Jiangxi 341000, China
| | - Q Zhong
- Department of Medical Imaging, Ganzhou People's Hospital, Ganzhou Hospital-Nanfang Hospital, Southern Medical University, Ganzhou, Jiangxi 341000, China
| | - B Lai
- Department of Medical Imaging, Ganzhou People's Hospital, Ganzhou Hospital-Nanfang Hospital, Southern Medical University, Ganzhou, Jiangxi 341000, China
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Wang L, Lai B, Ran X, Tang H, Cao D. Recent Advances of Diketopyrrolopyrrole Derivatives in Cancer Therapy and Imaging Applications. Molecules 2023; 28:molecules28104097. [PMID: 37241837 DOI: 10.3390/molecules28104097] [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: 04/05/2023] [Revised: 05/10/2023] [Accepted: 05/11/2023] [Indexed: 05/28/2023] Open
Abstract
Cancer is threatening the survival of human beings all over the world. Phototherapy (including photothermal therapy (PTT) and photodynamic therapy (PDT)) and bioimaging are important tools for imaging-mediated cancer theranostics. Diketopyrrolopyrrole (DPP) dyes have received more attention due to their high thermal and photochemical stability, efficient reactive oxygen species (ROS) generation and thermal effects, easy functionalization, and tunable photophysical properties. In this review, we outline the latest achievements of DPP derivatives in cancer therapy and imaging over the past three years. DPP-based conjugated polymers and small molecules for detection, bioimaging, PTT, photoacoustic imaging (PAI)-guided PTT, and PDT/PTT combination therapy are summarized. Their design principles and chemical structures are highlighted. The outlook, challenges, and future opportunities for the development of DPP derivatives are also presented, which will give a future perspective for cancer treatment.
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Affiliation(s)
- Lingyun Wang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, Guangzhou 510641, China
| | - Bihong Lai
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, Guangzhou 510641, China
| | - Xueguang Ran
- Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Ministry of Agriculture Key Laboratory of Animal Nutrition and Feed Science in South China, State Key Laboratory of Livestock and Poultry Breeding, Guangzhou 510641, China
| | - Hao Tang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, Guangzhou 510641, China
| | - Derong Cao
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, Guangzhou 510641, China
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Lai B, Shen L, Ye S, Shen X, Zhou D, Guo X, Zhou H, Pan Y, Tong J. Influence of continuity of care on self-management ability and quality of life in outpatient maintenance hemodialysis patients. Ther Apher Dial 2022; 26:1166-1173. [PMID: 35043556 PMCID: PMC9790337 DOI: 10.1111/1744-9987.13800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 10/26/2021] [Accepted: 12/02/2021] [Indexed: 12/30/2022]
Abstract
INTRODUCTION The objective of this study was to evaluate the effect of continuity of care on self-management ability and quality of life (QOL) in patients undergoing maintenance hemodialysis (MHD). METHODS One hundred patients were randomly assigned to the observation group and the control group. In the observation group, patients received a 12-month continuity of care. In the control group, patients were given with routine nursing. Evaluate the patients' self-management ability and QOL between two groups 1 week before discharge and 6 and 12 months outpatient MHD. RESULTS Observation group had higher Hemodialysis Self-Management Instrument (HD-SMI) scores and Kidney Disease Quality of Life-Short Form (KDQOL-SF™) scores than control group at 6 and 12 months outpatient MHD. But patients in observation group had a much lower systolic blood pressure than those in control group at 12 months outpatient MHD. CONCLUSIONS Our study suggested that continuity of care in the form of online education, telephone visit, and outpatient visit could improve self-management ability and QOL of patients undergoing MHD.
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Affiliation(s)
- Bihong Lai
- Department of Nursing, Shanghai Pudong HospitalFudan University Pudong Medical CenterShanghaiChina
| | - Li Shen
- Department of Nursing, Shanghai Pudong HospitalFudan University Pudong Medical CenterShanghaiChina
| | - Shuiying Ye
- Department of Nursing, Shanghai Pudong HospitalFudan University Pudong Medical CenterShanghaiChina
| | - Xia Shen
- Department of Nursing, Shanghai Pudong HospitalFudan University Pudong Medical CenterShanghaiChina
| | - Dongchi Zhou
- Department of NephrologyShanghai Pudong Hospital, Fudan University Pudong Medical CenterShanghaiChina
| | - Xiaocui Guo
- Department of Nursing, Shanghai Pudong HospitalFudan University Pudong Medical CenterShanghaiChina
| | - Huaxian Zhou
- Department of Nursing, Shanghai Pudong HospitalFudan University Pudong Medical CenterShanghaiChina
| | - Yangbin Pan
- Department of NephrologyShanghai Pudong Hospital, Fudan University Pudong Medical CenterShanghaiChina
| | - Jindong Tong
- Department of Vascular SurgeryShanghai Pudong Hospital, Fudan University Pudong Medical CenterShanghaiChina
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Quek JS, Lai B, Yap AU, Hu S. Non-pharmacological management of dental fear and anxiety in children and adolescents: An umbrella review. Eur J Paediatr Dent 2022; 23:230-242. [PMID: 36172904 DOI: 10.23804/ejpd.2022.23.03.11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
AIM To synthesise knowledge on the relative efficacies of non-pharmacological strategies for managing dental fear and anxiety (DFA) in children and adolescents, specifically their effects on behaviour, anxiety levels and pain perception. METHODS An umbrella review on non-pharmacological strategies used to manage DFA in children and adolescents was conducted based the Joanna Briggs Institute methodology. Searches were performed in 5 main electronic databases and the grey-literature. Two independent reviewers selected and appraised the included studies using the AMSTAR2 tool. Disagreements were resolved by a third reviewer. CONCLUSION Audio-visual distraction was effective in reducing anxiety during a variety of dental procedures including those requiring local anaesthesia. A combination of techniques may be more effective in managing DFA in children and adolescents, possibly improving pain perception and cooperative behaviour.
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Affiliation(s)
- J S Quek
- National Dental Centre Singapore Department of Restorative Dentistry, Ng Teng Fong General Hospital, Singapore Faculty of Dentistry, National University of Singapore
| | - B Lai
- National Dental Centre Singapore Department of Restorative Dentistry, Ng Teng Fong General Hospital, Singapore Faculty of Dentistry, National University of Singapore
| | - A U Yap
- National Dental Centre Singapore Department of Restorative Dentistry, Ng Teng Fong General Hospital, Singapore Faculty of Dentistry, National University of Singapore
| | - S Hu
- National Dental Centre Singapore Department of Restorative Dentistry, Ng Teng Fong General Hospital, Singapore Faculty of Dentistry, National University of Singapore
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Lai B, Phan K, Lewis N, Shumack S. A rare case of vernal keratoconjunctivitis in a patient with atopic dermatitis treated with tralokinumab. J Eur Acad Dermatol Venereol 2021; 36:e343-e345. [PMID: 34807480 DOI: 10.1111/jdv.17824] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Revised: 11/03/2021] [Accepted: 11/17/2021] [Indexed: 12/14/2022]
Affiliation(s)
- B Lai
- St George Dermatology and Skin Cancer Centre, Kogarah, NSW, Australia
| | - K Phan
- St George Dermatology and Skin Cancer Centre, Kogarah, NSW, Australia
| | - N Lewis
- Department of Ophthalmology, Royal North Shore Hospital, St Leonards, NSW, Australia.,University of Sydney Medical School, Sydney, NSW, Australia
| | - S Shumack
- St George Dermatology and Skin Cancer Centre, Kogarah, NSW, Australia.,University of Sydney Medical School, Sydney, NSW, Australia.,Department of Dermatology, Royal North Shore Hospital, St Leonards, NSW, Australia
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Quek SJ, Sim YF, Lai B, Lim W, Hong CH. The effect of parenting styles on enforcement of oral health behaviours in children. Eur Arch Paediatr Dent 2021; 22:83-92. [PMID: 32418053 DOI: 10.1007/s40368-020-00537-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2019] [Accepted: 05/03/2020] [Indexed: 01/13/2023]
Abstract
PURPOSE To examine the relationship between parenting styles and parental attitudes towards oral health practices in children. METHODS Parents of children aged 4-6 years presenting to four public dental clinics completed the Parenting Styles Dimensions Questionnaire (PSDQ) and a questionnaire on parental attitudes, child diet and oral hygiene practices. Child oral health was evaluated using Plaque Index (PI) and dmft-Index. RESULTS Three hundred and eighty-nine children (mean age: 62.3 ± 9.8 months) were recruited. The median dmft was 4 (IQR = 9) and median PI was 1.5 (IQR = 0.8). An authoritative parenting style was observed in 95.1% of parents. Authoritative parents were more likely to monitor sweets/snacks intake (P = 0.004) and less inclined to offer sweets/snacks in exchange for good behaviour (P = 0.04) than permissive parents. However, actual between-meal snacking frequency did not differ between styles (P = 0.43). Permissive parents were less likely to ensure bedtime toothbrushing (P = 0.001) or brush thoroughly when busy or tired (P = 0.03) compared to authoritative parents; these attitudes were associated with higher frequencies of actual omission of bedtime toothbrushing (P = 0.006) in their children. A higher frequency of omitting bedtime toothbrushing significantly predicted a permissive parenting style (OR = 12.1, P = 0.009). Parenting styles were not associated with dmft (P = 0.72) and/or PI (P = 0.34). CONCLUSIONS Authoritative parenting was associated with positive attitudes regarding both preventive dietary and oral hygiene practices. Actual oral hygiene practices were more ideal in children with authoritative parents, but parenting styles had no impact on actual dietary habits.
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Affiliation(s)
- S J Quek
- Department of Restorative Dentistry (Paediatric Dentistry), National Dental Centre Singapore, 5 Second Hospital Avenue, Singapore, 168938, Singapore.
| | - Y F Sim
- Faculty of Dentistry, National University of Singapore, 9 Lower Kent Ridge Road, Level 10, Singapore, 119085, Singapore
| | - B Lai
- Department of Restorative Dentistry (Paediatric Dentistry), National Dental Centre Singapore, 5 Second Hospital Avenue, Singapore, 168938, Singapore
| | - W Lim
- Youth Preventive Services Division, School Dental Services & School Dental Centre, Health Promotion Board, 3 Second Hospital Avenue, #04-00, Singapore, 168937, Singapore
| | - C H Hong
- Discipline of Orthodontics and Paediatric Dentistry, Faculty of Dentistry, National University of Singapore, 9 Lower Kent Ridge Road, Level 10, Singapore, 119085, Singapore
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Yu J, Ren J, Chen G, Lai B. P-74 CYP1A2 functions as a tumor suppressor in hepatocellular carcinoma through targeting HGF/c-Met axis. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.04.156] [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: 10/23/2022] Open
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Lai B, Singh SC, Bindra J, Saraj C, Shukla A, Yadav T, Wu W, McGill S, Dalal N, Srivastava A, Guo C. Hydrogen evolution reaction from bare and surface-functionalized few-layered MoS 2 nanosheets in acidic and alkaline electrolytes. Mater Today Chem 2019; 14:100207. [PMID: 31903442 PMCID: PMC6936932 DOI: 10.1016/j.mtchem.2019.100207] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 10/04/2019] [Accepted: 10/06/2019] [Indexed: 06/01/2023]
Abstract
Hydrogen is considered as an ideal and sustainable energy carrier because of its high energy density and carbon-free combustion. Electrochemical water splitting is the only solution for uninterrupted, scalable, and sustainable production of hydrogen without carbon emission. However, a large-scale hydrogen production through electrochemical water splitting depends on the availability of earth-abundant electrocatalysts and a suitable electrolyte medium. In this article, we demonstrate that hydrogen evolution reaction (HER) performance of electrocatalytic materials can be controlled by their surface functionalization and selection of a suitable electrolyte solution. Here, we report syntheses of few-layered MoS2 nanosheets, NiO nanoparticles (NPs), and multiwalled carbon nanotubes (MWCNTs) using scalable production methods from earth-abundant materials. Magnetic measurements of as-produced electrocatalyst materials demonstrate that MoS2 nanoflakes are diamagnetic, whereas surface-functionalized MoS2 and its composite with carbon nanotubes have strong ferromagnetism. The HER performance of the few-layered pristine MoS2 nanoflakes, MoS2/NiO NPs, and MoS2/NiO NPs/MWCNT nanocomposite electrocatalysts are studied in acidic and alkaline media. For bare MoS2, the values of overpotential (η10) in alkaline and acidic media are 0.45 and 0.54 V, respectively. Similarly, the values of current density at 0.5 V overpotential are 27 and 6.2 mA/cm2 in alkaline and acidic media, respectively. The surface functionalization acts adversely in the both alkaline and acidic media. MoS2 nanosheets functionalized with NiO NPs also demonstrated excellent performance for oxygen evolution reaction with anodic current of ~60 mA/cm2 and Tafel slope of 78 mVdec-1 in alkaline medium.
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Affiliation(s)
- B. Lai
- The Institute of Optics, University of Rochester, Rochester, NY, 14627, USA
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, China
| | - Subhash C. Singh
- The Institute of Optics, University of Rochester, Rochester, NY, 14627, USA
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, China
| | - J.K. Bindra
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL, 32306, USA
| | - C.S. Saraj
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, China
| | - A. Shukla
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, China
| | - T.P. Yadav
- Department of Physics, Institute of Science, Banaras Hindu University, Varanasi, 222005, India
| | - W. Wu
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, China
| | - S.A. McGill
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, 30201, USA
| | - N.S. Dalal
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL, 32306, USA
| | - Amit Srivastava
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL, 32306, USA
- Department of Physics, TDPG College, VBS Purvanchal University, Jaunpur, 222001, India
| | - Chunlei Guo
- The Institute of Optics, University of Rochester, Rochester, NY, 14627, USA
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, China
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Ma H, Lai B, Dong S, Lv Y, Wang S, Jin X, Pan Z. Effect of dexmedetomidine on postoperative cognitive function in elderly patients undergoing anesthesia with controlled hypotension for endoscopic sinus surgery. J BIOL REG HOMEOS AG 2019; 33:1143-1148. [PMID: 31317698] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Affiliation(s)
- H Ma
- Department of Anesthesiology, The Second Hospital of Jilin University, Changchun, Jilin, China
| | - B Lai
- Department of Intensive Care of Unit, The Second Hospital of Jilin University, Changchun, Jilin, China
| | - S Dong
- Department of Anesthesiology, The Second Hospital of Jilin University, Changchun, Jilin, China
| | - Y Lv
- Department of Anesthesiology, The Second Hospital of Jilin University, Changchun, Jilin, China
| | - S Wang
- Department of Anesthesiology, The Second Hospital of Jilin University, Changchun, Jilin, China
| | - X Jin
- Department of Anesthesiology, The Second Hospital of Jilin University, Changchun, Jilin, China
| | - Z Pan
- Department of Anesthesiology, The Second Hospital of Jilin University, Changchun, Jilin, China
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Huang B, Lai B, Xu L, Wang Y, Cao Y, Yan P, Chen J. Low employment and low willingness of being reemployed in Chinese working-age maintained hemodialysis patients. Ren Fail 2018; 39:607-612. [PMID: 28805490 PMCID: PMC6446148 DOI: 10.1080/0886022x.2017.1361834] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
AIM Returning to society plays an important role in improving the quality of life in maintenance hemodialysis (MHD) patients, and retention of employment is one of the core enablers. The study is to assess the employment status and to determine the variables for unemployment in Chinese MHD patients. METHODS Prevalent MHD patients from four dialysis centers in Shanghai China were enrolled. We assessed patients' employment status, current social functioning, hemodialysis modality, annual income and general health condition. Among current unemployed working-age patients, the reasons of quitting jobs and willingness of being reemployed were evaluated. RESULTS A total of 231 patients were studied, among which 114 patients were unemployed 1 year before hemodialysis. Among 117 employed patients, 16 patients quitted jobs before dialysis inception, while 49 patients quitted jobs at the initiation of HD, and 26 patients followed after a few months' HD. The main reasons for ceasing employment were physical insufficiency, conflict between dialysis and work schedules, lack of support from employers and resistance from family members. Among the 166 patients who were in their working age, 26 patients were employed. The unemployed patients had the characters of elder age, lower education level, higher annual family income, higher female ratio, lower blood flow, lower physical functioning, and social functioning and lower frequency of weekend hemodialysis and HDF/HF. Among the 140 unemployed patients, only 47 patients had the willingness of being reemployed. Their unemployment status was positively associated with elder age ((OR) 3.13, 95% CI, 1.08-9.1), lower education level ((OR) 1.97, 95% CI, 1.05-5.92), and higher family income ((OR) 7.75, 95% CI, 2.49-24.14). CONCLUSION Ratio of employment and willingness of being reemployed was low in MHD working-age patients. Lack of social and family's support also hampered patient's returning to society except for the HD treatment quality.
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Affiliation(s)
- Bihong Huang
- a Department of Nursing , Huashan Hospital Fudan University , Shanghai , China
| | - Bihong Lai
- b Department of Nursing , Pudong Hospital, Fudan University , Shanghai , China
| | - Ling Xu
- c Department of Nursing , Shanghai Fifth Hospital, Fudan University , Shanghai , China
| | - Ying Wang
- d Department of Nursing , The 455th Hospital of PLA , Shanghai , China
| | - Yanpei Cao
- a Department of Nursing , Huashan Hospital Fudan University , Shanghai , China
| | - Ping Yan
- e Department of Cardiology , Huashan Hospital Fudan University , Shanghai , China
| | - Jing Chen
- f Department of Nephrology , Huashan Hospital Fudan University , Shanghai , China
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Woollacott A, Lai B, Nair P, Flood V. SUN-P294: Vitamin D Status of Hospitalised Patients Receiving Nutritional Support. Clin Nutr 2017. [DOI: 10.1016/s0261-5614(17)30337-0] [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: 10/18/2022]
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Chan O, Moore L, Lai B, Jeong E, Nelson L, Malik F, Sykes J, Mathur S, Wu K. WS04.5 Predicting six-minute walk distance in adults with cystic fibrosis during hospitalisation. J Cyst Fibros 2017. [DOI: 10.1016/s1569-1993(17)30179-0] [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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Wedding JL, Harris HH, Bader CA, Plush SE, Mak R, Massi M, Brooks DA, Lai B, Vogt S, Werrett MV, Simpson PV, Skelton BW, Stagni S. Intracellular distribution and stability of a luminescent rhenium(i) tricarbonyl tetrazolato complex using epifluorescence microscopy in conjunction with X-ray fluorescence imaging. Metallomics 2017; 9:382-390. [DOI: 10.1039/c6mt00243a] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Chakraborty R, Serdy J, West B, Stuckelberger M, Lai B, Maser J, Bertoni MI, Culpepper ML, Buonassisi T. Development of an in situ temperature stage for synchrotron X-ray spectromicroscopy. Rev Sci Instrum 2015; 86:113705. [PMID: 26628142 DOI: 10.1063/1.4935807] [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] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In situ characterization of micro- and nanoscale defects in polycrystalline thin-film materials is required to elucidate the physics governing defect formation and evolution during photovoltaic device fabrication and operation. X-ray fluorescence spectromicroscopy is particularly well-suited to study defects in compound semiconductors, as it has a large information depth appropriate to study thick and complex materials, is sensitive to trace amounts of atomic species, and provides quantitative elemental information, non-destructively. Current in situ methods using this technique typically require extensive sample preparation. In this work, we design and build an in situ temperature stage to study defect kinetics in thin-film solar cells under actual processing conditions, requiring minimal sample preparation. Careful selection of construction materials also enables controlled non-oxidizing atmospheres inside the sample chamber such as H2Se and H2S. Temperature ramp rates of up to 300 °C/min are achieved, with a maximum sample temperature of 600 °C. As a case study, we use the stage for synchrotron X-ray fluorescence spectromicroscopy of CuIn(x)Ga(1-x)Se2 (CIGS) thin-films and demonstrate predictable sample thermal drift for temperatures 25-400 °C, allowing features on the order of the resolution of the measurement technique (125 nm) to be tracked while heating. The stage enables previously unattainable in situ studies of nanoscale defect kinetics under industrially relevant processing conditions, allowing a deeper understanding of the relationship between material processing parameters, materials properties, and device performance.
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Affiliation(s)
- R Chakraborty
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - J Serdy
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - B West
- School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, Arizona 85287, USA
| | - M Stuckelberger
- School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, Arizona 85287, USA
| | - B Lai
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - J Maser
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - M I Bertoni
- School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, Arizona 85287, USA
| | - M L Culpepper
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - T Buonassisi
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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Zhang W, Yang HL, Song JJ, Chen M, Dong Y, Lai B, Yu YG, Ma L, Zheng P. DAMGO depresses inhibitory synaptic transmission via different downstream pathways of μ opioid receptors in ventral tegmental area and periaqueductal gray. Neuroscience 2015; 301:144-54. [PMID: 26047721 DOI: 10.1016/j.neuroscience.2015.05.077] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Revised: 05/25/2015] [Accepted: 05/29/2015] [Indexed: 11/19/2022]
Abstract
Opioid-induced rewarding and motorstimulant effects are mediated by an increased activity of the ventral tegmental area (VTA) dopamine (DA) neurons. The excitatory mechanism of opioids on VTA-DA neurons has been proposed to be due to the depression of GABAergic synaptic transmission in VTA-DA neurons. However, how opioids depress GABAergic synaptic transmission in VTA-DA neurons remain to be studied. In the present study, we explored the mechanism of the inhibitory effect of [D-Ala(2), N-Me-Phe(4), Gly(5)-ol]-enkephalin (DAMGO) on GABAergic synaptic transmission in VTA-DA neurons using multiple approaches and techniques. Our results showed that (1) DAMGO inhibits GABAergic inputs in VTA-DA neurons at presynaptic sites; (2) effect of DAMGO on GABAergic inputs in VTA-DA neurons is inhibited by potassium channel blocker 4-aminopyridine (4-AP) and Gi protein inhibitor N-ethylmaleimide (NEM); (3) phospholipase A2 (PLA2) does not mediate the effect of DAMGO on GABAergic inputs in VTA-DA neurons, but mediates it in the periaqueductal gray (PAG); (4) multiple downstream signaling molecules of μ receptors do not mediate the effect of DAMGO on GABAergic inputs in VTA-DA neurons. These results suggest that DAMGO depresses inhibitory synaptic transmission via μ receptor-Gi protein-Kv channel pathway in VTA-DA neurons, but via μ receptor-PLA2 pathway in PAG neurons.
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Affiliation(s)
- W Zhang
- State Key Laboratory of Medical Neurobiology, Collaborative Innovation Center for Brain Science, School of Basic Medical Sciences and Institutes of Brain Science, Fudan University, Shanghai 200032, China
| | - H L Yang
- State Key Laboratory of Medical Neurobiology, Collaborative Innovation Center for Brain Science, School of Basic Medical Sciences and Institutes of Brain Science, Fudan University, Shanghai 200032, China
| | - J J Song
- State Key Laboratory of Medical Neurobiology, Collaborative Innovation Center for Brain Science, School of Basic Medical Sciences and Institutes of Brain Science, Fudan University, Shanghai 200032, China
| | - M Chen
- State Key Laboratory of Medical Neurobiology, Collaborative Innovation Center for Brain Science, School of Basic Medical Sciences and Institutes of Brain Science, Fudan University, Shanghai 200032, China
| | - Y Dong
- State Key Laboratory of Medical Neurobiology, Collaborative Innovation Center for Brain Science, School of Basic Medical Sciences and Institutes of Brain Science, Fudan University, Shanghai 200032, China
| | - B Lai
- State Key Laboratory of Medical Neurobiology, Collaborative Innovation Center for Brain Science, School of Basic Medical Sciences and Institutes of Brain Science, Fudan University, Shanghai 200032, China
| | - Y G Yu
- School of Life Sciences, State Key Laboratory of Medical Neurobiology and Institutes of Brain Science, Fudan University, Shanghai 200032, China
| | - L Ma
- State Key Laboratory of Medical Neurobiology, Collaborative Innovation Center for Brain Science, School of Basic Medical Sciences and Institutes of Brain Science, Fudan University, Shanghai 200032, China
| | - P Zheng
- State Key Laboratory of Medical Neurobiology, Collaborative Innovation Center for Brain Science, School of Basic Medical Sciences and Institutes of Brain Science, Fudan University, Shanghai 200032, China.
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Stojanovska L, Law C, Lai B, Chung T, Nelson K, Day S, Apostolopoulos V, Haines C. Maca reduces blood pressure and depression, in a pilot study in postmenopausal women. Climacteric 2014; 18:69-78. [PMID: 24931003 DOI: 10.3109/13697137.2014.929649] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
OBJECTIVE Lepidium meyenii (Maca) has been used for centuries for its fertility-enhancing and aphrodisiac properties. In an Australian study, Maca improved anxiety and depressive scores. The effects of Maca on hormones, lipids, glucose, serum cytokines, blood pressure, menopausal symptoms and general well-being in Chinese postmenopausal women were evaluated. METHODS A randomized, double-blind, placebo-controlled, cross-over study was conducted in 29 postmenopausal Hong Kong Chinese women. They received 3.3 g/day of Maca or placebo for 6 weeks each, in either order, over 12 weeks. At baseline, week 6 and week 12, estradiol, follicle stimulating hormone (FSH), sex hormone binding globulin (SHBG), thyroid stimulating hormone (TSH), full lipid profiles, glucose and serum cytokines were measured. The Greene Climacteric, SF-36 Version 2, Women's Health Questionnaire and Utian Quality of Life Scales were used to assess the severity of menopausal symptoms and health-related quality of life. RESULTS There were no differences in estradiol, FSH, TSH, SHBG, glucose, lipid profiles and serum cytokines amongst those who received Maca as compared to the placebo group; however, significant decreases in diastolic blood pressure and depression were apparent after Maca treatment. CONCLUSIONS Maca did not exert hormonal or immune biological action in the small cohort of patients studied; however, it appeared to reduce symptoms of depression and improve diastolic blood pressure in Chinese postmenopausal women. Although results are comparable to previous similar published studies in postmenopausal women, there might be a cultural difference among the Chinese postmenopausal women in terms of symptom reporting.
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Affiliation(s)
- L Stojanovska
- * Centre for Chronic Disease Prevention and Management, College of Health and Biomedicine, Victoria University , Victoria , Australia
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Chen S, Deng J, Yuan Y, Flachenecker C, Mak R, Hornberger B, Jin Q, Shu D, Lai B, Maser J, Roehrig C, Paunesku T, Gleber SC, Vine DJ, Finney L, VonOsinski J, Bolbat M, Spink I, Chen Z, Steele J, Trapp D, Irwin J, Feser M, Snyder E, Brister K, Jacobsen C, Woloschak G, Vogt S. The Bionanoprobe: hard X-ray fluorescence nanoprobe with cryogenic capabilities. J Synchrotron Radiat 2014; 21:66-75. [PMID: 24365918 PMCID: PMC3874019 DOI: 10.1107/s1600577513029676] [Citation(s) in RCA: 64] [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] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Accepted: 10/28/2013] [Indexed: 05/20/2023]
Abstract
Hard X-ray fluorescence microscopy is one of the most sensitive techniques for performing trace elemental analysis of biological samples such as whole cells and tissues. Conventional sample preparation methods usually involve dehydration, which removes cellular water and may consequently cause structural collapse, or invasive processes such as embedding. Radiation-induced artifacts may also become an issue, particularly as the spatial resolution increases beyond the sub-micrometer scale. To allow imaging under hydrated conditions, close to the `natural state', as well as to reduce structural radiation damage, the Bionanoprobe (BNP) has been developed, a hard X-ray fluorescence nanoprobe with cryogenic sample environment and cryo transfer capabilities, dedicated to studying trace elements in frozen-hydrated biological systems. The BNP is installed at an undulator beamline at sector 21 of the Advanced Photon Source. It provides a spatial resolution of 30 nm for two-dimensional fluorescence imaging. In this first demonstration the instrument design and motion control principles are described, the instrument performance is quantified, and the first results obtained with the BNP on frozen-hydrated whole cells are reported.
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Affiliation(s)
- S. Chen
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
- Correspondence e-mail:
| | - J. Deng
- Applied Physics, Northwestern University, Evanston, IL 60208, USA
| | - Y. Yuan
- Department of Radiation Oncology, Northwestern University, Chicago, IL 60611, USA
| | | | - R. Mak
- Department of Physics and Astronomy, Northwestern University, Evanston, IL 60208, USA
| | | | - Q. Jin
- Department of Physics and Astronomy, Northwestern University, Evanston, IL 60208, USA
| | - D. Shu
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - B. Lai
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - J. Maser
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - C. Roehrig
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - T. Paunesku
- Department of Radiation Oncology, Northwestern University, Chicago, IL 60611, USA
| | - S. C. Gleber
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - D. J. Vine
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - L. Finney
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - J. VonOsinski
- Northwestern Synchrotron Research Center, Argonne, IL 60439, USA
| | - M. Bolbat
- Northwestern Synchrotron Research Center, Argonne, IL 60439, USA
| | - I. Spink
- Xradia Inc., Pleasanton, CA 94588, USA
| | - Z. Chen
- Xradia Inc., Pleasanton, CA 94588, USA
| | - J. Steele
- Xradia Inc., Pleasanton, CA 94588, USA
| | - D. Trapp
- Xradia Inc., Pleasanton, CA 94588, USA
| | - J. Irwin
- Xradia Inc., Pleasanton, CA 94588, USA
| | - M. Feser
- Xradia Inc., Pleasanton, CA 94588, USA
| | - E. Snyder
- Xradia Inc., Pleasanton, CA 94588, USA
| | - K. Brister
- Northwestern Synchrotron Research Center, Argonne, IL 60439, USA
| | - C. Jacobsen
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
- Applied Physics, Northwestern University, Evanston, IL 60208, USA
- Department of Physics and Astronomy, Northwestern University, Evanston, IL 60208, USA
- Chemistry of Life Processes Institute, Northwestern University, Evanston, IL 60208, USA
| | - G. Woloschak
- Department of Radiation Oncology, Northwestern University, Chicago, IL 60611, USA
| | - S. Vogt
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
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Yuan Y, Paunesku T, Liu W, Chen S, Lai B, Brister K, Vogt S, Woloschak G. EGFR-Mediated Nuclear Delivery Improves the Genotoxic Effect of Fe3O4@TiO2 Nanoparticles. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.1733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Yuan Y, Chen S, Gleber SC, Lai B, Brister K, Flachenecker C, Wanzer B, Paunesku T, Vogt S, Woloschak GE. Mapping the subcellular localization of Fe 3O 4@TiO 2 nanoparticles by X-ray Fluorescence Microscopy. ACTA ACUST UNITED AC 2013; 463. [PMID: 26413134 DOI: 10.1088/1742-6596/463/1/012020] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The targeted delivery of Fe3O4@TiO2 nanoparticles to cancer cells is an important step in their development as nanomedicines. We have synthesized nanoparticles that can bind the Epidermal Growth Factor Receptor, a cell surface protein that is overexpressed in many epithelial type cancers. In order to study the subcellular distribution of these nanoparticles, we have utilized the sub-micron resolution of X-ray Fluorescence Microscopy to map the locationof Fe3O4@TiO2 NPs and other trace metal elements within HeLa cervical cancer cells. Here we demonstrate how the higher resolution of the newly installed Bionanoprobe at the Advanced Photon Source at Argonne National Laboratory can greatly improve our ability to distinguish intracellular nanoparticles and their spatial relationship with subcellular compartments.
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Affiliation(s)
- Y Yuan
- Department of Radiation Oncology, Northwestern University, Chicago, IL 60611, USA
| | - S Chen
- X-ray Sciences Division, Argonne National Laboratory, Argonne, IL 60439, USA
| | - S C Gleber
- X-ray Sciences Division, Argonne National Laboratory, Argonne, IL 60439, USA
| | - B Lai
- X-ray Sciences Division, Argonne National Laboratory, Argonne, IL 60439, USA
| | - K Brister
- Life Sciences Collaborative Access Team, Argonne National Laboratory, Argonne, IL 60439, USA
| | | | - B Wanzer
- Department of Radiation Oncology, Northwestern University, Chicago, IL 60611, USA
| | - T Paunesku
- Department of Radiation Oncology, Northwestern University, Chicago, IL 60611, USA
| | - S Vogt
- X-ray Sciences Division, Argonne National Laboratory, Argonne, IL 60439, USA
| | - G E Woloschak
- Department of Radiation Oncology, Northwestern University, Chicago, IL 60611, USA
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Oakes M, Ingall ED, Lai B, Shafer MM, Hays MD, Liu ZG, Russell AG, Weber RJ. Iron solubility related to particle sulfur content in source emission and ambient fine particles. Environ Sci Technol 2012; 46:6637-44. [PMID: 22621615 DOI: 10.1021/es300701c] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The chemical factors influencing iron solubility (soluble iron/total iron) were investigated in source emission (e.g., biomass burning, coal fly ash, mineral dust, and mobile exhaust) and ambient (Atlanta, GA) fine particles (PM2.5). Chemical properties (speciation and mixing state) of iron-containing particles were characterized using X-ray absorption near edge structure (XANES) spectroscopy and micro-X-ray fluorescence measurements. Bulk iron solubility (soluble iron/total iron) of the samples was quantified by leaching experiments. Major differences were observed in iron solubility in source emission samples, ranging from low solubility (<1%, mineral dust and coal fly ash) up to 75% (mobile exhaust and biomass burning emissions). Differences in iron solubility did not correspond to silicon content or Fe(II) content. However, source emission and ambient samples with high iron solubility corresponded to the sulfur content observed in single particles. A similar correspondence between bulk iron solubility and bulk sulfate content in a series of Atlanta PM2.5 fine particle samples (N = 358) further supported this trend. In addition, results of linear combination fitting experiments show the presence of iron sulfates in several high iron solubility source emission and ambient PM2.5 samples. These results suggest that the sulfate content (related to the presence of iron sulfates and/or acid-processing mechanisms by H(2)SO(4)) of iron-containing particles is an important proxy for iron solubility.
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Affiliation(s)
- M Oakes
- Department of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia, United States.
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Wadiwalla M, Andrews J, Lai B, Buss C, Lupien SJ, Pruessner JC. Effects of manipulating the amount of social-evaluative threat on the cortisol stress response in young healthy women. Stress 2010; 13:214-20. [PMID: 20392193 DOI: 10.3109/10253890903277561] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Psychological stress is known to activate the hypothalamic-pituitary-adrenal axis, resulting in the release of cortisol from the adrenal cortex into the bloodstream. Cortisol is the major human stress hormone and its health correlates continue to be investigated by laboratories around the world. One line of research suggests that specific situational variables play a role in the creation of a stressful situation. The current study examined the effects of systematically varying several situational characteristics on the cortisol stress response in 80 healthy young women exposed to a public speaking task. Three main factors and its interactions were investigated by locating the expert panel either inside or outside of the room, having the subjects speak either about themselves or somebody else, and by asking half of the subjects to perform a distractor task in addition to performing the public speaking. We interpreted these manipulations as variations of social evaluative threat, ego-involvement, and divided attention. We hypothesized that the variations and their interactions would cause differences in endocrine stress responses. The results showed that only the manipulation of social-evaluative threat had a significant main effect on the cortisol stress response in women. There was a further trend (p = 0.07) for a four-way interaction effect. No other main or interaction effects could be observed. We conclude that in women, social-evaluative threat affects the endocrine stress response. This is in contrast to a previous study showing no effects of this variation in men. Thus, future studies should more closely investigate sex or gender effects that might be interacting with the situational aspects of a stressful task.
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Affiliation(s)
- M Wadiwalla
- The Hospital for Sick Children (SickKids), University of Toronto, 555 University Avenue, M5G1X8, Toronto, Ontario, Canada
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Abstract
The authors examined the association between disaster-related traumatic experiences and posttraumatic stress disorder (PTSD) symptoms in 155 youth, aged 8-18 years, from the Lower Eyre Peninsula of South Australia who were affected by January 2005 bushfires. Youth completed measures of PTSD symptoms and disaster experiences 11-5 months postdisaster. Many youth (27%) reported moderate to severe levels of PTSD symptoms; younger children reported greater PTSD symptom severity than older youth. Perceived personal life threat and ongoing loss/disruption were related to greater PTSD symptomatology. Following disasters, it may be helpful to identify young children and youth who perceived that their life was threatened and experienced more ongoing life disruption, as these youth may be at higher risk for persistent PTSD symptoms.
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Affiliation(s)
- C Yelland
- Division of Mental Health, Children, Youth & Women's Health Service, Women's and Children's Hospital, Adelaide, Australia
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Huang Y, Huang YL, Lai B, Zheng P, Zhu YC, Yao T. Raloxifene acutely reduces glutamate-induced intracellular calcium increase in cultured rat cortical neurons via inhibition of high-voltage-activated calcium current. Neuroscience 2007; 147:334-41. [PMID: 17543470 DOI: 10.1016/j.neuroscience.2007.04.037] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2006] [Revised: 03/09/2007] [Accepted: 04/04/2007] [Indexed: 12/20/2022]
Abstract
There is increasing evidence indicating that estrogen replacement therapy produces neuroprotective actions but has undesirable side effects on the reproductive system. Raloxifene is a selective estrogen receptor modulator that exerts estrogen agonist action in the brain while acting as an estrogen antagonist in the reproductive system. In the present study, we investigated whether raloxifene affected the glutamate-induced calcium (Ca2+) overload in rat cultured cortical neurons. The bulk cytosolic intracellular Ca2+ level was measured by using confocal microscopy with fluorescent Ca2+ probe fluo3. Whole-cell recording technique was used to observe the effects of raloxifene on N-methyl-D-aspartate (NMDA)-evoked and voltage-activated Ca2+ currents in cultured cortical neurons. Pre-exposure of cortical neurons to raloxifene (0.5 microM-10 microM) for 3 min attenuated intracellular Ca2+ increase induced by application of glutamate (300 microM) for 1 min. The action of raloxifene was reversible after washout. ICI 182,780 and thapsigargin did not block the action of raloxifene. In whole-cell recording experiments, raloxifene (10 microM) significantly reduced the amplitude of the high-voltage-activated Ca2+ current but had no effect on NMDA-evoked Ca2+ current. The present study demonstrates that raloxifene acutely reduces glutamate-induced intracellular Ca2+ increase probably via inhibition of high-voltage-activated calcium channels.
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Affiliation(s)
- Y Huang
- National Laboratory of Medical Neurobiology, Shanghai Medical College, Fudan University, Shanghai, China
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Shu D, Maser J, Holt M, Winarski R, Preissner C, Smolyanitskiy A, Lai B, Vogt S, Stephenson GB. Optomechanical Design of a Hard X-ray Nanoprobe Instrument with Nanometer-Scale Active Vibration Control. ACTA ACUST UNITED AC 2007. [DOI: 10.1063/1.2436307] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [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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Glasauer S, Langley S, Boyanov M, Lai B, Kemner K, Beveridge TJ. Mixed-valence cytoplasmic iron granules are linked to anaerobic respiration. Appl Environ Microbiol 2006; 73:993-6. [PMID: 17142380 PMCID: PMC1800766 DOI: 10.1128/aem.01492-06] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Intracellular granules containing ferric and ferrous iron formed in Shewanella putrefaciens CN32 during dissimilatory reduction of solid-phase ferric iron. It is the first in situ detection at high resolution (150 nm) of a mixed-valence metal particle residing within a prokaryotic cell. The relationship of the internal particles to Fe(III) reduction may indicate a respiratory role.
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Affiliation(s)
- S Glasauer
- Department of Land Resource Science, University of Guelph, Guelph, Ontario N1G 2W1, Canada.
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Isakovic AF, Evans PG, Kmetko J, Cicak K, Cai Z, Lai B, Thorne RE. Shear modulus and plasticity of a driven charge density wave. Phys Rev Lett 2006; 96:046401. [PMID: 16486854 DOI: 10.1103/physrevlett.96.046401] [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] [Subscribe] [Scholar Register] [Received: 08/12/2005] [Indexed: 05/06/2023]
Abstract
We have probed the effects of transverse variations in pinning strength on charge-density-wave (CDW) structure in NbSe3 by x-ray micro-beam diffraction. In ribbonlike crystals having a large longitudinal step in thickness, the CDW first depins on the thick side of the step, causing rotations of the CDW wave vector. By measuring these rotations as a function of position and electric field, the corresponding shear strains are determined, allowing the CDW's shear modulus to be estimated. These results demonstrate the usefulness of x-ray microdiffraction as a tool in studying collective dynamics in electronic crystals.
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Affiliation(s)
- A F Isakovic
- Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853, USA
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Rayner B, Harris H, Carter E, Vogt S, Cai Z, Lai B, Chin C, Lee Y, Lay P, Witting P. Th-P17:425 The use of synchronton radiation to measure ion flux and cellular protein and lipid changes within cardiac ischemia reperfusion injury. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)82383-4] [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: 10/23/2022]
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Xiao Y, Cai Z, Wang ZL, Lai B, Chu YS. An X-ray nanodiffraction technique for structural characterization of individual nanomaterials. J Synchrotron Radiat 2005; 12:124-128. [PMID: 15728964 DOI: 10.1107/s0909049504028596] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2004] [Accepted: 11/05/2004] [Indexed: 05/24/2023]
Abstract
An X-ray micro/nanodiffraction technique that allows structural characterization of individual nanomaterials has been developed at an insertion-device beamline of the Advanced Photon Source. Using the extremely high brightness of the third-generation synchrotron radiation source and advanced high-resolution high-energy zone-plate focusing optics, X-rays of energies from 6 to 12 keV have been focused into a spot smaller than 200 nm with a photon density gain of more than 50,000 so that significant photon flux can be intercepted by a nanoscale material to generate a measurable diffraction signal for structural characterization. This paper describes the instrumentation of the technique and discusses the application of the technique to studies of tin oxide nanobelts.
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Affiliation(s)
- Y Xiao
- Experimental Facilities Division, Argonne National Laboratory, Argonne, IL 60439, USA
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Lai B, Maser J, Vogt S, Paunesku T, Woloschak GE. Workshop on biological applications of X-ray microscopy and imaging. Advanced Photon Source, Argonne National Laboratory, Argonne, IL, USA, 28-29 April 2003. Int J Radiat Biol 2004; 80:459-61. [PMID: 15362699 DOI: 10.1080/09553000410001703246] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- B Lai
- Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL 60439, USA
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Hu ZW, Chu YS, Lai B, Thomas BR, Chernov AA. Diffraction and imaging study of imperfections of crystallized lysozyme with coherent X-rays. Acta Crystallogr D Biol Crystallogr 2004; 60:621-9. [PMID: 15039549 DOI: 10.1107/s0907444904000915] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2003] [Accepted: 01/12/2004] [Indexed: 11/11/2022]
Abstract
Phase-contrast X-ray diffraction imaging and high-angular-resolution diffraction combined with phase-contrast radiographic imaging were employed to characterize defects and perfection of a uniformly grown tetragonal lysozyme crystal in the symmetric Laue case. The full-width at half-maximum (FWHM) of a 4 4 0 rocking curve measured from the original crystal was approximately 16.7 arcsec and imperfections including line defects, inclusions and other microdefects were observed in the diffraction images of the crystal. The observed line defects carry distinct dislocation features running approximately along the <1 1 0> growth front and have been found to originate mostly in a central growth area and occasionally in outer growth regions. Inclusions of impurities or formations of foreign particles in the central growth region are resolved in the images with high sensitivity to defects. Slow dehydration led to the broadening of a fairly symmetric 4 4 0 rocking curve by a factor of approximately 2.6, which was primarily attributed to the dehydration-induced microscopic effects that are clearly shown in X-ray diffraction images. The details of the observed defects and the significant change in the revealed microstructures with drying provide insight into the nature of imperfections, nucleation and growth, and the properties of protein crystals.
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Affiliation(s)
- Z W Hu
- BAE Systems, NASA/Marshall Space Flight Center, Huntsville, AL 35812, USA.
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Dillon CT, Kennedy BJ, Lay PA, Lai B, Cai Z, Stampfl AP, Ilinski P, Legnini D, Maser J, Rodrigues W, Shea-McCarthy G, Cholewa M. Implementation of X-ray microscopy and micro-XANES analysis for investigations of the cellular uptake and cellular metabolism of transition metals. ACTA ACUST UNITED AC 2003. [DOI: 10.1051/jp4:200300083] [Citation(s) in RCA: 3] [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: 11/14/2022]
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Lin JJA, Paterson D, Peele AG, McMahon PJ, Chantler CT, Nugent KA, Lai B, Moldovan N, Cai Z, Mancini DC, McNulty I. Measurement of the spatial coherence function of undulator radiation using a phase mask. Phys Rev Lett 2003; 90:074801. [PMID: 12633233 DOI: 10.1103/physrevlett.90.074801] [Citation(s) in RCA: 7] [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] [Received: 07/23/2002] [Indexed: 05/24/2023]
Abstract
A measurement of the horizontal coherence function of 7.9 keV radiation from an undulator beam line at the Advanced Photon Source is reported. X-ray diffraction from a phase-shifting mask was used, and the coherence function was measured as a function of the width of beam-conditioning slits in the beam line. The coherence distribution is found to be best described by a Lorentzian function.
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Affiliation(s)
- J J A Lin
- School of Physics, University of Melbourne, Victoria 3010, Australia
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36
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Affiliation(s)
- B Lai
- Advanced Photon Source and Biosciences Divisions, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL 60439, USA
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37
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Eastman DE, Stagarescu CB, Xu G, Mooney PM, Jordan-Sweet JL, Lai B, Cai Z. Observation of columnar microstructure in step-graded Si1-xGex/Si films using high-resolution X-ray microdiffraction. Phys Rev Lett 2002; 88:156101. [PMID: 11955207 DOI: 10.1103/physrevlett.88.156101] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2001] [Indexed: 05/23/2023]
Abstract
Columnar microstructure in step-graded Si(1-x)Ge(x)/Si(001) structures with low threading dislocation densities has been determined using high angular resolution (approximately 0.005 degrees ) x-ray microdiffraction. X-ray rocking curves of a 3-microm-thick strain-relaxed Si(0.83)Ge(0.17) film show many sharp peaks and can be simulated with a model having a set of Gaussians having narrow angular widths (0.013 degrees -0.02 degrees ) and local ranges of tilt angles varying from 0.05 degrees to 0.2 degrees. These peaks correspond to individual tilted rectangular columnar micrograins having similar (001) lattice spacings and average areas of 0.8 to 2.0 microm(2).
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Affiliation(s)
- D E Eastman
- James Franck Institute, University of Chicago, 5640 S. Ellis Avenue, Chicago, Illinois 60637, USA
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38
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Abstract
Magnetic x-ray diffraction combined with x-ray focusing optics was used to image individual antiferromagnetic spin density wave domains in a chromium single crystal at the micron scale. The cross section for nonresonant magnetic x-ray scattering depends on the antiferromagnetic modulation vector and spin polarization direction and allows these quantities to be extracted independently. The technique was used to show that the broadening of the nominally first-order "spin-flip" transition at 123 kelvin, at which the spins rotate by 90 degrees C, originates at the walls between domains with orthogonal modulation vectors. During cooling, the transition begins at these walls and progresses inward. The modulation vector domains are themselves unchanged.
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Affiliation(s)
- P G Evans
- Bell Laboratories, Lucent Technologies, 600-700 Mountain Avenue, Murray Hill, NJ 07974, USA.
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39
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Zhang Y, Li S, Lai B, Wang H, Zhan X, Liu G, Wang Y. [Clinical research on the antitumor activity and phenotype of tumor infiltrating lymphocytes for treatment of lung cancer]. Zhongguo Fei Ai Za Zhi 2001; 4:336-9. [PMID: 21059311 DOI: 10.3779/j.issn.1009-3419.2001.05.06] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND To evaluate the feasibility and toxicity of the infusion of tumor infiltrating lymphocytes ( TIL) with rIL-2 in patients with lung cancer. METHODS TILs derived from tissue samples which obtained from the surgically removed tumors of 51 patients were cultivated in vitro. Fifteen patients were infused with 0. 2×10⁸ to 1. 62×10⁸ TIL cells intravenously at 2-8 weeks after operation and rIL-2 was inhaled into lung at dose of 3×10⁵ U/ day for 3 days. TIL cytolytic activities on day 0 and day 25th after incubation were assessed with 3H-TdR release assay in vitro while the positive proportion of phenotypes of TIL were estimated with indirect immunofluorescence technique. RESULTS The cytolytic activity of TIL against autologous tumor cell and 801-D cell line after incubation ( 50. 35% and 42. 81% respectively) was significantly higher than that before incubation ( 13. 01% and 11. 46% respectively) ( P < 0. 05) . There was no apparent difference of the cytolytic activity between autologous tumor cell group and 801-D cell line group. The percentage of CD3+ and CD8+ TILs after culture was significant higher than that before cultivation( P < 0. 05) and there was no change in the percentage of CD4+ TILs and the ratio of CD4+ / CD8+ . Adverse effects were mild, only 3 of 15 patients had fever, headache, and nausea immediately after infusion of TIL and then recovered within several hours. Others had no any side effects. The immunity function of all patients was improved after infusion. CONCLUSIONS The result suggests that the infusion of expanded TILs in vitro, derived from surgical samples, is feasible and safe in patients with locally advanced lung cancer.
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Affiliation(s)
- Y Zhang
- Department of Thoracic Surgery , Beijing Thoracic Tumor and Tuberculosis Hospital ( I nstitute) , Beijing 101149, P. R . China
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40
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Hu ZW, Lai B, Chu YS, Cai Z, Mancini DC, Thomas BR, Chernov AA. Phase sensitive x-ray diffraction imaging of defects in biological macromolecular crystals. Phys Rev Lett 2001; 87:148101. [PMID: 11580675 DOI: 10.1103/physrevlett.87.148101] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2001] [Indexed: 05/23/2023]
Abstract
Conventional x-ray diffraction topography is currently used to map defects in the bulk of protein crystals, but the lack of sufficient contrast is frequently a limiting factor. We experimentally demonstrate that this barrier can be circumvented using a method that combines phase sensitive and diffraction imaging principles. Details of defects revealed in tetragonal lysozyme and cubic ferritin crystals are presented and discussed. The approach enabling the detection of the phase changes of diffracted x rays should prove to be useful in the study of defect structures in a broad range of biological macromolecular crystals.
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Affiliation(s)
- Z W Hu
- University Space Research Association, NASA/Marshall Space Flight Center, Huntsville, Alabama 35812, USA.
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41
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Jin L, Lai B, Geng Y, Wang Y, Si L. The influence of human single chain inteleukin-12 gene transduction on the biological behavior of hepatoma 7721 cells. Chin Med Sci J 2001; 16:147-52. [PMID: 12899326] [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: 03/04/2023]
Abstract
OBJECTIVE To investigate the anti-tumor effects of human single chain interleukin-12 (hscIL-12). METHOD pcDNA/hscIL-12 recombinant was transfected into human hepatic carcinoma cells (7721 cells) by lipofectin method. The 7721/hscIL-12 cells which secrete hscIL-12 stably, were obtained via G418 selection, and in vitro the influence of hscIL-12 gene transduction on the growth of tumor cells was evaluated by cell cycle analysis. In vivo, genetically engineered 7721 cells (7721/hscIL-12, 7721/pcDNA) and parental cells were implanted into BALB/c nude mice, respectively. 7721/pcDNA and 7721/hscIL-12 groups were divided into two sub-groups on day 8: one was administered with hPBL twice, 6 days at interval; the other was given equal volume of PBS. Mice were sacrificed on day 26, and spleens and tumors were taken out for histologic assay. RESULTS hscIL-12 produced stably by 7721/hscIL-12 cells had bioactivity, and it was proved by Western blot, immunocytochemistry, and in situ hybridization. In vitro, compared with 7721 and 7721/pcDNA, the 7721/hscIL-12 grew much more slowly. FACS assay showed apparent G1 arrest of 7721/hscIL-12 cells. In animal experiment, on day 8 after inoculation, the tumors of 7721 and 7721/pcDNA group were up to 5 approximately 7 mm, while those of 7721/hscIL-12 group were 2 approximately 4 mm. When treated with hPBL, the tumor of 7721/hscIL-12 group disappeared completely. Histologically, the tumors from 7721/hscIL-12 without hPBL treatment had numerous lymphocyte infiltration, the tumor cells displayed depression looking, atrophy, focal necrosis and apoptosis, whereas the tumors of 7721 and 7721/pcDNA groups grew thrivingly. CONCLUSION hscIL-12 transduced 7721 cells could induced significant antitumor immune response which resulted in tumor regression totally when the hPBL was inoculated, and also hscIL-12 has certain effects on mice immune system. These findings suggest that hscIL-12 and hscIL-12 gene therapy might have promising prospects in clinical application.
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Affiliation(s)
- L Jin
- Department of Immunopathology, Xi'an Medical University, Xi'an 710061.
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Tang J, Lai B, Zhu Y, Wang H, Zhan X, Wang Y. [Inhibitory effect of 5F11-DXR immunoconjugate on human lung cancer cells]. Zhongguo Fei Ai Za Zhi 2001; 4:169-74. [PMID: 21047469 DOI: 10.3779/j.issn.1009-3419.2001.03.03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND To evaluate the inhibition effect of immunoconjugate of doxorubicin(DXR) with a monoclonal antibody, 5F11 on human lung cancer cells and its reversal effect on resistant lung cancer cells to chemotherapeutic drug. METHODS DXR was attached to 5F11 using dilute glutaraldehyde crossing.The antitumor activity of immunoconjugate, 5F11-DXR, against the sensitive antigen-positive cell line, A2, drug-resistant antigen-positive cell lines, 801-D and 801-DDXR, and antigen-negative cell line, ascite cancer cell was evaluated by human tumor cell cloning assay and dye exclusion assay. RESULTS According to the results of various assays, comparing with single DXR, 5F11-DXR could significantly increase the cytotoxicity to A2, 801-D and 801-DDXR cell lines with a DXR concentration of 0.4 μg/ml(P<0.05), and this difference was even more distinct to A2 cell line with lower concentration of DXR (0.04 μg/ml). However, there was no remarkable difference between 5F11-DXR and single DXR in cytotoxicity to antigen-negative ascite cancer cell(P>0.05). CONCLUSIONS 5F11-DXR can remarkably increase the cytotoxicity of DXR to the sensitive target cells and even effectively reverse the drug-resistant cell lines to DXR. There is no significant difference between 5F11-DXR and DXR in killing antigen-negative cancer cells.
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Affiliation(s)
- J Tang
- Beijing Tuberculosis and Thoracic Tumor Institute, Beijing 101149, P.R.China
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Li X, Ding M, Lai B. [Frequent loss of heterozygosity on chromosome 4 in human hepatocellular carcinoma]. Zhonghua Yi Xue Za Zhi 2001; 81:37-40. [PMID: 11798850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE Few previous studies have shown high frequency of loss of heterozygosity (LOH) on chromosome 4q in hepatocellular carcinoma (HCC). We define more clearly the deletion regions that may harbor the putative tumor suppressor genes in HCC. METHODS Forty-eight cases of HCC and their corresponding non-tumor liver tissues were investigated with 12 microsatellite polymorphic markers for LOH. RESULTS Twenty-one of 48 (44%) and 30 of 48 (63%) tumors showed LOH on at least one locus on the short and the long arms respectively. Two distinct common deleted regions (CDR) with different patterns of deletion were identified. The first CDR was located on 4q22-q25, between loci D4S392 and D4S1625. In addition, 17 of 27 (63%) of the informative tumors showed LOH on this region with locus D4S406 and constituted the highest rate of LOH on chromosome 4. The second CDR was located at 4q27-q31, between loci D4S1625 and D4S1652. CONCLUSION There are at least two tumor suppressor loci on 4q.
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Affiliation(s)
- X Li
- Department of Anatomical and Cellular Pathology and Surgery, The Chinese University of Hong Kong, Hong Kong, China
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Zhan X, Wang Y, Lai B. [Killing effect of low intensity ultrasound on human lung cancer cells in vitro]. Zhongguo Fei Ai Za Zhi 2000; 3:455-7. [PMID: 21029583 DOI: 10.3779/j.issn.1009-3419.2000.06.16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND To investigate the effects of low intensity ultrasound on human lung cancer cells. METHODS The human small cell lung cancer cells line SM, adenocarcinoma cell line A2 and human lung fibroblast cells FB were treated with low intensity ultrasound, and the killing effects of ultrasound on the cells were detected by the trypan blue exclusion and clonogenic survival assay. RESULTS The killing effects of low intensity ultrasound ( 0. 8W/ cm²) on various type of human lung cancer and human pulmonary fibroblast were observed after 3-minute treatment. All of the cells were killed by sonicate for 10-minute treatment. The higher the cell concentration, the lower the killing efficiency. The temperature in the tube containing cell suspension did not obviously increase after 10-minute sonicate. Compared with the application of doxorubicin alone, the doxorubicin cytoxicity was increased by 100-fold in SM cell cologenic survival assay when doxorubicin was combined with an intensity of ultrasound at 0. 8W/ cm². CONCLUSIONS The low intensity continuous wave ultrasound can obviously kill lung cancer cells and dramatically increase the cytotoxicity of doxorubicin for lung cancer cells.
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Affiliation(s)
- X Zhan
- Cellular and Molecular Biology Lab, Beijing Thoracic Tumor Research Institute, Beijing 101149, P . R. China
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Zhang Y, Lai B, Li S, Wang H, Zhan X, Liu G, Wang Y. [Experimental research of tumor infiltrating lymphocytes for treatment of lung cancer]. Zhongguo Fei Ai Za Zhi 2000; 3:441-4. [PMID: 21029579 DOI: 10.3779/j.issn.1009-3419.2000.06.12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND To explore the conditions and characterization of tumor infiltrating lymphocytes(TILs) isolation and expansion. METHODS TILs were separated from tissue samples which obtained from the surgically removed tumor of 67 patients with lung cancer bymechanic and enzyme digestion and discontinuous density Ficoll-paque gradient centrifugation ways. TILs from 34 patients were incubated with 10% human type AB serum RPMI-1640 in vitro. RESULTS The average number of TIL was 6. 84*10⁶ per gram tumor tissue. The number of TIL from patients in stage I was greater than that from patients in stage III and IV , but with no difference in expanding among them. The number of TIL from patients with adenocarcinoma was similar to that with squamous cell carcinoma, but TIL isolated from adenocarcinoma expanded much more faster than that from squamous cell carcinoma. TIL expanded rapidly during 7-28 days and most of them appeared the maximum expansion within 35 days. TIL incubated from 17 of 34 patients had expanded exceeding 1*10⁹, so the rate of infusion was 50%. CONCLUSIONS The results suggest TIL can be effectively separated from the tumor and expanded in vitro and these provide the basis for adoptive immunotherapy with TIL in the treatment of lung cancer.
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Affiliation(s)
- Y Zhang
- Department of Thoracic Surgery , Beijing Thoracic Tumor and Tuberculosis Hospital( Institute) , Beijing 101149, P. R. China
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Labrenz M, Druschel GK, Thomsen-Ebert T, Gilbert B, Welch SA, Kemner KM, Logan GA, Summons RE, De Stasio G, Bond PL, Lai B, Kelly SD, Banfield JF. Formation of sphalerite (ZnS) deposits in natural biofilms of sulfate-reducing bacteria. Science 2000; 290:1744-7. [PMID: 11099408 DOI: 10.1126/science.290.5497.1744] [Citation(s) in RCA: 238] [Impact Index Per Article: 9.9] [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: 11/02/2022]
Abstract
Abundant, micrometer-scale, spherical aggregates of 2- to 5-nanometer-diameter sphalerite (ZnS) particles formed within natural biofilms dominated by relatively aerotolerant sulfate-reducing bacteria of the family Desulfobacteriaceae. The biofilm zinc concentration is about 10(6) times that of associated groundwater (0.09 to 1.1 parts per million zinc). Sphalerite also concentrates arsenic (0.01 weight %) and selenium (0.004 weight %). The almost monomineralic product results from buffering of sulfide concentrations at low values by sphalerite precipitation. These results show how microbes control metal concentrations in groundwater- and wetland-based remediation systems and suggest biological routes for formation of some low-temperature ZnS deposits.
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Affiliation(s)
- M Labrenz
- Department of Geology and Geophysics, University of Wisconsin-Madison, 1215 West Dayton Street, Madison, WI 53706, USA
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Abstract
Studies on the influence of organic cosolvents on lysozyme folding have been reported. As most of the researches are confined to a few specific molecules and focus on equilibrium states, less is known about the effect on folding dynamics. We have studied the influence of six soluble organic cosolvents on hen egg white lysozyme heat induced denaturation and refolding dynamics. It was found that trifluoroethanol (TFE) can change the folding pathway significantly. With the presence of TFE, the overshot phenomenon generally observed in lysozyme folding at 222 nm disappears. The common mechanism of how organic cosolvents influence folding is analyzed. The heat induced denaturation temperature was found to have a quantitative relationship with the slow phase rate constant during folding. We discuss this finding and hypothesize that it is due to the similar influence of organic cosolvent on the transition state of heat denaturation and refolding.
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Affiliation(s)
- B Lai
- State Key Laboratory for Structural Studies of Stable and Unstable Species, Institute of Physical Chemistry, College of Chemistry, Peking University, 100871, Beijing, PR China
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48
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Zhang H, Wang H, Lai B, Zhang C, Yang X. [Effects of exogenous wild-type p53 gene expression on sensitivity to chemotherapeutic agents in human lung cancer cell]. Zhongguo Fei Ai Za Zhi 2000; 3:166-9. [PMID: 20950542 DOI: 10.3779/j.issn.1009-3419.2000.03.02] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND To investigate the effects of exogenous wild-type p53 (wtp53) gene expression on sensitivity to chemotherapeutic agents with different mechanism of action in human lung cancer cells. METHODS A human lung cancer cells line 801-D with point mutation of p53 was transfected with either constructed recombinant plasmid pEGFP-p53 , which expressed wtp53 or pEGFP vector. The expression of neo and wtp53 gene in anti-G418 clone , 801-D vector and 801-D-wtp53 , were detected by PCR. The functional activity of transfected wtp53 was demonstrated by partly 801-D apoptosis. 3 H-TdR uptake assay was taken for drug sensitivity measure according to standard procedures. Flow cytometry was employed to determine cell death. RESULTS Sensitivity of 801-D-wtp53 to cisplatin and 5-fluorouracil was higher than that of 801-D vector by 9. 7 and 11. 4 fold respectively. There was no significant difference for other DNA-damaging agents and non-DNA-damaging agents , such as etoposide and adriamycin , vincristine and methylenum Caeruleum. Analysis of DNA ladder by gel electrophoresis and morphological observation showed cell necrosis characteristics. CONCLUSIONS 801-D cell line shows a selective sensitization to DNA-damaging agents when exogenous wtp53 is expressed. The increased sensitivity to cisplatin by exogenous wtp53 expression may be through non-apoptosis pathway. This study results provide experimental bases for comprehensive treatment of lung cancer.
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Affiliation(s)
- H Zhang
- Cellular and Molecular Biology Lab , Beijing Thoracic Tumor Research Institute , Beijing 101149 , P. R. China
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49
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Lai B. [Values of telomerase in the diagnosis and treatment of lung cancer.]. Zhongguo Fei Ai Za Zhi 2000; 3:81-83. [PMID: 20939958 DOI: 10.3779/j.issn.1009-3419.2000.02.01] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
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Yue W, Lai B, Wang H, Zhan X. [Inhibition of lung cancer cell line growth in vitro by telomerase anti-sense oligonucleotides.]. Zhongguo Fei Ai Za Zhi 2000; 3:84-7. [PMID: 20939959 DOI: 10.3779/j.issn.1009-3419.2000.02.02] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND To research the inhibition of lung cancer cell line by telomerase anti-sense DNA , and explore the possibility of its clinical application. METHODS A phosphorothioate oligonucleotide (PS-ODN) with sequence identical to the repeat sequence of the mammaliam telomere [5'- d(TTAGGG)-3'] and a control scrambled sequence 5'- d(TGTGAG)-3' were incubated with a lung cancer cell line 801-D , and the effects of PS-ODN on cell line growth , colony-forming and growth shape were detected. RESULTS Telomerase anti-sense DNA inhibited telomerase activation cell line 801-D growth and colony-forming. The activity of the 6-mer telomere mimic demonstrated a dose dependency. No activity was observed with the scrambled controls. CONCLUSIONS These results demonstrated the inhibitive effects of a short hexameric oligonucleotide telomere mimic on lung cancer cell line growth in vitro and the potential utility of telomerase anti-sense DNA as cancer cell inhibitors.
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Affiliation(s)
- W Yue
- Beijing Tuberculosis and Thoracic Tumor Research Institute , Beijing 101149 , P. R. China
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