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Cai J, Lu B, Chen H, Lu M, Zhang Y, Luo C, You L, Dai M, Zhao Y. The impacts of exposure to risk factors during youth on the increasing global trend of early-onset pancreatic cancer. Public Health 2024; 229:65-72. [PMID: 38402665 DOI: 10.1016/j.puhe.2023.11.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Revised: 10/18/2023] [Accepted: 11/05/2023] [Indexed: 02/27/2024]
Abstract
OBJECTIVES An increasing trend of pancreatic cancer in young adults has emerged in some countries. This study aimed to investigate global trends of pancreatic cancer in young adults and explore the impact of exposure to risk factors on pancreatic cancer incidence during youth. METHODS Global and national data on pancreatic cancer incidence, disability-adjusted life-years, attributive mortality, and summary exposure values of risk factors were retrieved from the Global Burden of Disease 2019. The average annual percent change (AAPC) of incidence and mortality was calculated. Additionally, generalized additive models were applied to explore the non-linear associations between the levels and changes in the Human Development Index and AAPC. RESULTS Global pancreatic cancer incidence increased during various periods from 1990 to 2019, particularly in adults aged <45 years from 2010 to 2019, at an average annual increase rate of 0.7% (95% confidence interval: 0.4-1.0%). The AAPC of early-onset pancreatic cancer incidence from 2010 to 2019 was negatively correlated with Human Development Index levels in both 2010 and 2019 but positively correlated with Human Development Index acceleration. Significant increases in early-onset pancreatic cancer incidence were observed over this period in 32 of 88 countries, primarily in South America, North America, Oceania, and Africa. Early-onset pancreatic cancer mortality attributed to high body mass index and fasting plasma glucose increased, while that attributed to tobacco use declined. CONCLUSIONS An increasing trend has emerged in the global incidence and burden of early-onset pancreatic cancer over the last few decades. This rise may partly be attributed to global epidemics of high body mass index and fasting plasma glucose.
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Affiliation(s)
- J Cai
- Department of Hospital Infection Control, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730, China; Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730, China
| | - B Lu
- Medical Research Center, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730, China; Department of Cancer Epidemiology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China
| | - H Chen
- Medical Research Center, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730, China
| | - M Lu
- Medical Research Center, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730, China
| | - Y Zhang
- Medical Research Center, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730, China; Department of Cancer Epidemiology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China
| | - C Luo
- Medical Research Center, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730, China; Department of Cancer Epidemiology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China
| | - L You
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730, China
| | - M Dai
- Department of Cancer Epidemiology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China.
| | - Y Zhao
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730, China.
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Chen Y, Tang F, Yin XQ, Han ZD, Qian B, Zhao W, Jiang XF, Fang Y, You L. Magnetic properties and critical behaviors of the nodal-line semimetal candidate ErIn 3. J Phys Condens Matter 2023; 36:055801. [PMID: 37875140 DOI: 10.1088/1361-648x/ad0674] [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] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 10/24/2023] [Indexed: 10/26/2023]
Abstract
The AuCu3-type intermetallic compoundsReIn3(Re= a rare earth ion) with type-IV magnetic space groups are predicted to show topologically nontrivial electronic states. Here, we grow ErIn3single crystals, and study their magnetic properties and critical behaviors by means of the magnetic susceptibility, and magnetization isotherm measurements. Combining a detailed analysis of the magnetic susceptibility and isothermal magnetization, we find that this compound harbors a complicated magnetic phase diagram, and its magnetic moment arrangement appears not to simply follow the fashion as observed in the isostructural counterpart GdIn3(it adopts a conventional type-Cmagnetic structure that belongs to type-IV magnetic space groups). A careful study of the magnetic properties around the antiferromagnetic (AFM)-paramagnetic transition yields the critical exponentsβ= 0.309 (0.297),γ= 1.117 (1.038), andδ= 4.617 (4.454), indicating that the tricritical mean field model or the three-dimensional Ising model works for ErIn3's magnetic behaviors and the presence of a long-range AFM interaction therein. Besides, the exchange interaction distanceJ(r) ∼r-4.665as well confirms a long-range magnetic coupling in ErIn3. Our results offer the clues that the magnetic structure varies from one member ofReIn3family to another, and to confirm their electronic features in the AFM phases further experimental and theoretical studies are still desired.
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Affiliation(s)
- Y Chen
- Jiangsu Key Laboratory of Thin Films, School of Physical Science and Technology, Soochow University, Suzhou 215006, People's Republic of China
- Jiangsu Laboratory of Advanced Functional Materials, School of Electronic and Information Engineering, Changshu Institute of Technology, Changshu 215500, People's Republic of China
| | - F Tang
- Jiangsu Key Laboratory of Thin Films, School of Physical Science and Technology, Soochow University, Suzhou 215006, People's Republic of China
- Jiangsu Laboratory of Advanced Functional Materials, School of Electronic and Information Engineering, Changshu Institute of Technology, Changshu 215500, People's Republic of China
| | - X-Q Yin
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Shenyang National Laboratory for Materials Science, School of Physics and Astronomy and Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Z-D Han
- Jiangsu Laboratory of Advanced Functional Materials, School of Electronic and Information Engineering, Changshu Institute of Technology, Changshu 215500, People's Republic of China
| | - B Qian
- Jiangsu Laboratory of Advanced Functional Materials, School of Electronic and Information Engineering, Changshu Institute of Technology, Changshu 215500, People's Republic of China
| | - W Zhao
- Department of Materials Science and Engineering, Monash University, Clayton, VIC 3800, Australia
| | - X-F Jiang
- Jiangsu Laboratory of Advanced Functional Materials, School of Electronic and Information Engineering, Changshu Institute of Technology, Changshu 215500, People's Republic of China
| | - Y Fang
- Jiangsu Laboratory of Advanced Functional Materials, School of Electronic and Information Engineering, Changshu Institute of Technology, Changshu 215500, People's Republic of China
| | - L You
- Jiangsu Key Laboratory of Thin Films, School of Physical Science and Technology, Soochow University, Suzhou 215006, People's Republic of China
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Chu B, Zhang A, Huang J, Peng X, You L, Wu C, Tang S. Corrigendum: Preparation and biological evaluation of a novel agarose-grafting-hyaluronan scaffold for accelerated wound regeneration (2020 Biomed. Mater.15045009). Biomed Mater 2023; 18. [PMID: 37698365 DOI: 10.1088/1748-605x/acf2d6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Accepted: 08/22/2023] [Indexed: 09/13/2023]
Affiliation(s)
- Bin Chu
- Department of Biomedical Engineering, Jinan University, Guangzhou 510632, People's Republic of China
- Key Laboratory of Biomedical Materials and Implant Devices, Research Institute of Tsinghua University in Shenzhen, Shenzhen 518057, People's Republic of China
| | - Ailian Zhang
- Department of Biomedical Engineering, Jinan University, Guangzhou 510632, People's Republic of China
| | - Jianyan Huang
- Department of Biomedical Engineering, Jinan University, Guangzhou 510632, People's Republic of China
| | - Xiaohui Peng
- Department of Biomedical Engineering, Jinan University, Guangzhou 510632, People's Republic of China
| | - Lingling You
- Department of Biomedical Engineering, Jinan University, Guangzhou 510632, People's Republic of China
| | - Chaoxi Wu
- Guangzhou Jinan Biomedicine Research and Development Center, Institute of Biomedicine, College of Life Science and Technology, Jinan University, Guangzhou 510632, People's Republic of China
| | - Shunqing Tang
- Department of Biomedical Engineering, Jinan University, Guangzhou 510632, People's Republic of China
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Wang H, You L, Zhou X, Surabhi V, Matta E, Aal AA. Abstract No. 340 ▪ FEATURED ABSTRACT Artificial intelligence-mediated multidisciplinary approaches for hepatocellular carcinoma early diagnosis. J Vasc Interv Radiol 2022. [DOI: 10.1016/j.jvir.2022.03.421] [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] Open
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Chen K, Zhang G, Xie H, You L, Li H, Zhang Y, Du C, Xu S, Melsaether C, Yuan S. Efficacy of Bifidobacterium animalis subsp. lactis, BB-12 ® on infant colic - a randomised, double-blinded, placebo-controlled study. Benef Microbes 2021; 12:531-540. [PMID: 34550055 DOI: 10.3920/bm2020.0233] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
To evaluate the administration of Bifidobacterium animalis subsp. lactis, BB-12® (BB-12) on infant colic in breastfed infants, a double-blind, placebo-controlled randomised study was conducted in Chengdu, China from April 2016 to October 2017 with 192 full-term infants less than 3 months of age and meeting the ROME III criteria for infant colic. After a 1-week run-in the infants were randomly assigned to receive daily BB-12 (1×109 cfu/day) or placebo for 3 weeks. Crying/fussing time were recorded using a 24 h structured diary. The primary endpoint was the proportion of infants achieving a reduction in crying and fussing time of ≥50% from baseline. Parent's/caregiver's health related quality of life was measured using a modified PedsQL™ 2.0 Family Impact Module and immunological biomarkers were evaluated from faecal samples at baseline and after the 21-day intervention. The percentage of infants achieving a reduction in the daily crying/fussing time ≥50% after the 21-day intervention was significantly higher in the infants supplemented with BB-12 (P<0.001). The mean number of crying episodes was significantly reduced in the BB-12 group compared to the placebo group (10.0±3.0 to 5.0±1.87 vs 10.5±2.6 to 7.5±2.8, respectively) (P<0.001) and the mean daily sleep duration was markedly increased from baseline to end of intervention in the BB-12 group compared to the infants in the placebo group (60.7±104.0 vs 31.9±102.7 min/day, respectively) (P<0.001). The faecal levels of human beta defensin 2, cathelicidin, slgA, calprotectin and butyrate were statistically higher in the BB-12 group compared to the placebo group after the 21-day intervention. At the end of the intervention the parent's/caregiver's physical, emotional and social functioning scores were significantly higher for the BB-12 group compared to the placebo group (all P<0.05). Supplementation of BB-12 is effective in reducing crying and fussing in infants diagnosed with infant colic.
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Affiliation(s)
- K Chen
- Department of Nutrition, Chengdu Women's and Children's Central Hospital, School of Medicine, University of Electronic Science and Technology of China, No. 1617, Riyue Avenue, Qingyang District, Chengdu, 6100131, China P.R.,Department of Child Health Care, Chengdu New Century Women's and Children's Hospital, No.77, Baojia Lane, Qingyang District, Chengdu, China P.R
| | - G Zhang
- Department of Pediatric Intensive Care Unit, Chengdu Women's and Children's Central Hospital, School of Medicine, University of Electronic Science and Technology of China, No. 1617, Riyue Avenue, Qingyang District, Chengdu, China P.R
| | - H Xie
- Department of Pediatrics, Dayi Maternal and Child Health Care Hospital, No. 539, Inner Mongolia Avenue, Jinyuan Town, Dayi County, Chengdu, China P.R
| | - L You
- Department of Child Health Care, Nanxin Community Health Service Center, N0. 168, Guanghe 1st Street, Wuhou District, Chengdu, China P.R
| | - H Li
- Department of Child Health Care, Qingbaijiang Maternal and Child Health Care Hospital, No.87, Qingjiang South Road, Qingbaijiang District, Chengdu, China P.R
| | - Y Zhang
- Department of Child Health Care, Jinniu Maternal and Child Health Care Hospital, No.12, Changyue Road, Jinniu District, Chengdu, China P.R
| | - C Du
- Department of Child Health Care, Longquanyi Maternal and Child Health Care Hospital, No.383, Yuyang Road, Longquanyi District, Chengdu, China P.R
| | - S Xu
- Department of Child Health Care, Huili Maternal and Child Health Care Hospital, No. 41, Jindai Road West Section, Guoyuan Township, Huili County, Xichang, China P.R
| | - C Melsaether
- Chr. Hansen A/S, HH Clinical Development, Kogle Alle 6, 2970 Hoersholm, Denmark
| | - S Yuan
- Department of Nutrition, Chengdu Women's and Children's Central Hospital, School of Medicine, University of Electronic Science and Technology of China, No. 1617, Riyue Avenue, Qingyang District, Chengdu, 6100131, China P.R
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You L, Lv Z, Li C, Ye W, Zhou Y, Jin J, Han Q. Worldwide cancer statistics of adolescents and young adults in 2019: a systematic analysis of the Global Burden of Disease Study 2019. ESMO Open 2021; 6:100255. [PMID: 34481330 PMCID: PMC8417345 DOI: 10.1016/j.esmoop.2021.100255] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 07/18/2021] [Accepted: 08/02/2021] [Indexed: 12/30/2022] Open
Abstract
Background The cancer burden in adolescents and young adults (AYAs) deserves more attention. However, global cancer statistics for AYAs are often presented as aggregates, concealing important heterogeneity. This study aimed to describe the worldwide profile of cancer incidence, mortality, and corresponding trends from 1990 to 2019 among 15-39-year olds by focusing on the patterns by age, sex, sociodemographic index (SDI), and regions. Patients and methods Global, regional, and country data on the number of cancer cases and cancer-related deaths for 29 cancer types were collected from the 2019 Global Burden of Disease (GBD) Study. We also summarized the results using five levels of the SDI and 21 GBD regions. Results In 2019, an estimated 1 335 100 new cancer cases and 397 583 cancer-related deaths occurred among AYAs worldwide. While the incidence rate increased mildly, the death rate decreased significantly between 1990 and 2019, with an estimated annual percentage change of 0.38 (95% confidence interval 0.36-0.39) and −0.93 (95% confidence interval −0.95 to −0.92), respectively. The cancer burden was disproportionally greater among women than among men. The cancer profiles varied substantially across geographical regions, with the highest burden being in South Asia and East Asia. Besides, the cancer incidence in the high SDI regions was four times higher than that in the low SDI regions; however, the mortality burden in the high SDI region was lower than that in the low SDI region, which reflected the differences in cancer profiles across SDI regions and the inferior outcomes in the low SDI regions. Conclusion This study updates the previous epidemiological data of the cancer burden of AYAs. The cancer burden in AYAs varied substantially according to age, sex, SDI, and geographical regions. These findings highlight that the specific cancer profile of AYA patients requires targeted cancer control measures to reduce the cancer burden in this age group. The cancer burden in AYAs varied substantially according to age, sex, SDI, and geographical regions. Cancer burden in AYAs was disproportionally greater among women than among men. Cancer profiles of AYAs varied across different geographical regions and SDI regions. Cancer burden in AYAs was still considerable in the low SDI regions.
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Affiliation(s)
- L You
- Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, People's Republic of China; Zhejiang Province Key Laboratory of Hematology Oncology Diagnosis and Treatment, Hangzhou, Zhejiang, People's Republic of China
| | - Z Lv
- Xinyuan Institute of Medicine and Biotechnology, School of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, People's Republic of China
| | - C Li
- Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, People's Republic of China; Zhejiang Province Key Laboratory of Hematology Oncology Diagnosis and Treatment, Hangzhou, Zhejiang, People's Republic of China
| | - W Ye
- Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, People's Republic of China; Zhejiang Province Key Laboratory of Hematology Oncology Diagnosis and Treatment, Hangzhou, Zhejiang, People's Republic of China
| | - Y Zhou
- Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, People's Republic of China; Zhejiang Province Key Laboratory of Hematology Oncology Diagnosis and Treatment, Hangzhou, Zhejiang, People's Republic of China
| | - J Jin
- Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, People's Republic of China; Zhejiang Province Key Laboratory of Hematology Oncology Diagnosis and Treatment, Hangzhou, Zhejiang, People's Republic of China.
| | - Q Han
- Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, People's Republic of China; Department of Pathology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, People's Republic of China.
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Cai J, Chen HD, Lu M, Zhang YH, Lu B, You L, Dai M, Zhao YP. [Trend analysis on morbidity and mortality of pancreatic cancer in China, 2005-2015]. Zhonghua Liu Xing Bing Xue Za Zhi 2021; 42:794-800. [PMID: 34814469 DOI: 10.3760/cma.j.cn112338-20201115-01328] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To analyze the trend of morbidity and mortality of pancreatic cancer in China from 2005 to 2015 and estimate the related age, period and cohort effect, respectively. Methods: Joinpoint regression analysis was used to analyze the trend of morbidity rate and mortality rate of pancreatic cancer during 2005-2015 and calculate the annual percentage change and average annual percentage change based on the data in the annual report of China Cancer Registry. Population aged 20-84 years was fitted by the Age-Period-Cohort model to estimate the effect parameters of age, period and cohort. Results: The trend variations of the crude morbidity rate and crude mortality rate of pancreatic cancer were consistent. The morbidity rate of pancreatic cancer firstly increased before 2008 and then decreased. The morbidity rate and mortality rate of pancreatic cancer were higher in men than women, and higher in urban areas than in rural areas. From 2005 to 2015, the overall age-standardized morbidity rate of pancreatic cancer increased by 2.78% annually and the overall age standardized mortality rate of pancreatic cancer increased by 2.24% annually. The age standardized morbidity of pancreatic cancer in rural men changed more rapidly, with an average annual increase of 3.74%, and the age standardized mortality rate of pancreatic cancer in urban men changed more rapidly, with an average annual increase of 3.57%. The age effect on the morbidity and mortality of pancreatic cancer increased with age, and the effect was most obvious in age group 70-80 years, the period effect increased over time and the cohort effect decreased with year, but rebound or fluctuation was observed after 1976. Conclusions: The morbidity rate and mortality rate of pancreatic cancer in China increased slightly in past decades. Strategies on effective prevention and control of pancreatic cancer should be developed in the future.
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Affiliation(s)
- J Cai
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - H D Chen
- Office of Cancer Screening, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - M Lu
- Office of Cancer Screening, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Y H Zhang
- Office of Cancer Screening, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - B Lu
- Office of Cancer Screening, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - L You
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - M Dai
- Office of Cancer Screening, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Y P Zhao
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
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Anton S, Mankowski R, Qiu P, You L, Bensadon B, Audino E, Custodero C, Lee J, Hincapie J, McLaren C, Leeuwenburgh C, Ganesh S. Vitamin D Supplementation Is Associated with a Reduction in Self-Reported Falls among Older Adults with Previous Fall History – Feasibility Study. J Frailty Aging 2021; 11:224-230. [DOI: 10.14283/jfa.2021.46] [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: 11/11/2022]
Abstract
Background: Vitamin D insufficiency contributes to muscle weakness and a higher risk of falls in older adults. Objectives: This study explored the impact of vitamin D supplementation on self-reported falls and physical function in older adults with low vitamin D levels and a recent fall history. Materials and Methods: Twenty-five older adults ≥ 70 years with two or more falls during the past year, low vitamin D blood levels (≥10 ng/ml and < 30 ng/mL), and slow gait speed (1.2 m/s) participated in a 6-month vitamin D supplementation (800 IU/day) study. A modified version of the Morse Fall Scale questionnaire was used to assess frequency of falls over one-year prior to study enrollment. Functional outcomes (short physical performance battery, handgrip strength, gait Timed Up and Go, and six-minute walk), and vitamin D levels were assessed at baseline and 6-month follow-up. Results: Based on diaries and pill counts, participants were generally adherent to the intervention (6 of 7 days per week). Supplementation with 800 IU/day of vitamin D for 6 months increased blood vitamin D levels from 23.25±4.8 ng/ml to 29.13±6.9 ng/ml (p<0.001). Self-reported number of falls decreased from an average of 3.76 ± 2.2 falls in one-year to 0.76 ± 1.4 falls (p <0.0001) over the 6-month intervention. No changes in functional outcome measures were observed. Conclusions: Vitamin D supplementation at the currently recommended dose of 800 IU/day increased blood vitamin D levels and reduced frequency of falls in older adults with low vitamin D levels and a recent fall history.
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You L, Zhang F, Huang S, Merchant A, Zhou X, Li Z. Over-expression of RNA interference (RNAi) core machinery improves susceptibility to RNAi in silkworm larvae. Insect Mol Biol 2020; 29:353-362. [PMID: 32086963 DOI: 10.1111/imb.12639] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 01/18/2020] [Accepted: 02/16/2020] [Indexed: 06/10/2023]
Abstract
RNA interference (RNAi), one of the strategies that organisms use to defend against invading viruses, is an important tool for functional genomic analysis. In insects, the efficacy of RNAi varies amongst taxa. Lepidopteran insects are, in large part, recalcitrant to RNAi. The overall goal of this study is to overcome such insensitivity in lepidopterans to RNAi. We hypothesize that over-expression of core RNAi machinery enzymes can improve RNAi efficacy in traditionally recalcitrant species. A transgenic Bombyx mori strain, Baculovirus Immediate-Early Gene, ie1, promoter driven expression of silkworm Dicer2 coding sequence (IE1-BmDicer2), which over-expresses BmDicer2, was generated by piggyBac transposon-mediated transgenesis. Two indexes, the ratio of animals that showed a silencing phenotype and the duration of silencing, were used to evaluate silencing efficiency. Significant knockdown of target gene expression was observed at 48 h postinjection at both the transcriptional and translational levels. Furthermore, we coexpressed B. mori Argonaute 2 BmAgo2)and BmDicer 2 and found that 22% of the animals (n = 18) showed an obvious silencing effect even at 72 h, suggesting that coexpression of these two RNAi core machinery enzymes further increased the susceptibility of B. mori to injected double-stranded RNAs. This study offers a new strategy for functional genomics research in RNAi-refractory insect taxa in general and for lepidopterans in particular.
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Affiliation(s)
- L You
- Key Laboratory of Insect Developmental and Evolutionary Biology, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, China
| | - F Zhang
- School of Life Science, Shanghai University, Shanghai, China
| | - S Huang
- Agricultrual and Medical Biotechnology, University of Kentucky, Lexington, KY, USA
| | - A Merchant
- Department of Entomology, University of Kentucky, Lexington, KY, USA
| | - X Zhou
- Department of Entomology, University of Kentucky, Lexington, KY, USA
| | - Z Li
- Key Laboratory of Insect Developmental and Evolutionary Biology, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, China
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Chu B, Zhang A, Huang J, Peng X, You L, Wu C, Tang S. Preparation and biological evaluation of a novel agarose-grafting-hyaluronan scaffold for accelerated wound regeneration. Biomed Mater 2020; 15:045009. [PMID: 32109900 DOI: 10.1088/1748-605x/ab7b3e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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: 12/12/2022]
Abstract
At present, seeking an effective dressing for wound regeneration has drawn considerable interest. In this paper, a novel agarose-grafting-hyaluronan (Ag-g-HA) scaffold was synthesized for rapid wound healing. Elemental analysis results showed that the HA grafting rate of Ag-g-HA was ∼69%. Ag-g-HA remained bioactive to accelerate cell proliferation and stimulate secretion of TNF-α for macrophagocyte RAW 264.7, and collagen I and collagen III for fibroblast 3T3. An i n vivo study demonstrated that Ag-g-HA showed a faster repair cycle and a better skin histological structure for a full-thickness skin defect. The collagen I, collagen III and TNF-α secreted by mice for Ag-g-HA were similiar to HA. Ag-g-HA showed a similiar biological activity to HA but had a longer degradation time through its improved insolubility. These findings demonstrate that the Ag-g-HA scaffold accelerated wound healing, and could be a promising novel scaffold for tissue engineering and regenerative medicine.
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Affiliation(s)
- Bin Chu
- Department of Biomedical Engineering, Jinan University, Guangzhou 510632, People's Republic of China. Key Laboratory of Biomedical Materials and Implant Devices, Research Institute of Tsinghua University in Shenzhen, Shenzhen 518057, People's Republic of China
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Lee A, You L, Harris L, Oh S, Fisher-Heffernan R, Brennan K, de Lange C, Huber L, Karrow N. Effect of algae or fish oil supplementation and porcine maternal stress on the adrenal transcriptome of male offspring fed a low-quality protein diet. Brain Behav Immun Health 2020; 4:100058. [PMID: 34589844 PMCID: PMC8474508 DOI: 10.1016/j.bbih.2020.100058] [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: 12/28/2019] [Accepted: 03/03/2020] [Indexed: 11/18/2022] Open
Abstract
Offspring adrenal function may be negatively affected in utero by maternal stressors such as microbial infection. Maternal supplementation with immunomodulatory compounds such as omega-3 polyunsaturated fatty acids (n-3 PUFA) may help minimize the adverse effects of maternal stress on fetal hypothalamic-pituitary-adrenal development and improve offspring health. Presently, n-3 PUFA sources are primarily fish-based, but n-3 PUFA microalgae (AL) may be an alternative. Previously, it was determined that maternal AL or fish oil (FO) supplementation to sows, in addition to maternal stress induced by Escherichia coli lipopolysaccharide (LPS) challenge appeared to have a greater influence on the stress response of male offspring compared to females. To further elaborate on these findings, this study assessed the effects of maternal AL or FO supplementation combined with a maternal LPS challenge on adrenal gene expression in male offspring fed a nursery diet containing low-quality protein sources. Forty-eight sows were fed gestation diets starting on gestation day (gd) 75 containing either 3.12% AL, 3.1% FO, or a control diet containing 1.89% corn oil. On gd 112, half the sows in each treatment were administered 10 μg/kg LPS i.m. Piglets were weaned at 21 days of age onto a common low-quality plant-based protein diet, and one week after weaning, four piglets per sow were administered 40 μg/kg LPS i.m. Two hours later, the piglets were euthanized to obtain adrenal tissue, and total RNA was extracted to carry out transcriptome analysis using the Affymetrix GeneChip WT Plus assay and subsequent validation by real-time PCR. Analysis revealed that adrenal steroidogenesis, fatty acid metabolism and immune function were significantly influenced by maternal diet and stress. Increased expression of immune-related genes including lymphocyte antigen 96, TLR-2 and NF-κB suggests that maternal AL supplementation may increase offspring sensitivity to inflammation after weaning. Decreased expression of lymphocyte antigen 96 in male offspring from sows receiving maternal LPS challenge also suggests a possible role of maternal stress in diminishing the offspring immune response to immune stress challenge. Increased expression of the genes encoding the 11BHSD2 enzyme in offspring from sows fed FO may also reduce the magnitude of the stress response. These data provide insight to the immune and metabolic mechanisms that may be influenced by maternal diet and stress. Expression of adrenal steroidogenesis genes were influenced by maternal treatment. Expression of lipid metabolism genes and immune function genes were enriched. Maternal algae supplementation may increase offspring sensitivity to inflammation. Maternal stress may reduce the offspring immune response to immune challenges. Maternal fish oil supplementation may reduce the offspring stress response.
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Affiliation(s)
- A.V. Lee
- Department of Animal Biosciences, University of Guelph, ON, N1G 2W1, Canada
| | - L. You
- Department of Animal Biosciences, University of Guelph, ON, N1G 2W1, Canada
| | - L.E. Harris
- Centre for Animal Nutrigenomics and Applied Animal Nutrition, Alltech Inc, Nicholasville, KY, 40356, USA
| | - S. Oh
- Department of Animal Biosciences, University of Guelph, ON, N1G 2W1, Canada
| | | | - K.M. Brennan
- Centre for Animal Nutrigenomics and Applied Animal Nutrition, Alltech Inc, Nicholasville, KY, 40356, USA
| | - C.F.M. de Lange
- Department of Animal Biosciences, University of Guelph, ON, N1G 2W1, Canada
| | - L. Huber
- Department of Animal Biosciences, University of Guelph, ON, N1G 2W1, Canada
| | - N.A. Karrow
- Department of Animal Biosciences, University of Guelph, ON, N1G 2W1, Canada
- Corresponding author.
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12
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Mankowski RT, You L, Buford TW, Leeuwenburgh C, Manini TM, Schneider S, Qiu P, Anton SD. Higher dose of resveratrol elevated cardiovascular disease risk biomarker levels in overweight older adults - A pilot study. Exp Gerontol 2019; 131:110821. [PMID: 31891746 DOI: 10.1016/j.exger.2019.110821] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 12/06/2019] [Accepted: 12/26/2019] [Indexed: 02/05/2023]
Abstract
Older adults are at high risk of developing cardiovascular disease (CVD). Pre-clinical studies indicate that resveratrol (RSV), a polyphenol commonly found in grapes and red wine, may help prevent development of CVD. Based on our previous reports where the 300 mg and 1000 mg doses appeared safe and improved psychomotor function in a dose-dependent manner, our hypothesis was that RSV would reduce biomarkers of CVD risk in overweight, but otherwise healthy older adults and that 1000 mg would lower CVD biomarkers >300 mg. This analysis was performed on samples from older participants (65 years and older) who were randomized to a 90 day RSV treatment with 300 mg (n = 10), 1000 mg (n = 9) or placebo (n = 10). We measured levels of CVD risk biomarkers i.e. oxidized low-density lipoprotein (oxLDL), soluble E-selectin-1 (sE-selectin), soluble Intercellular Adhesion Molecule-1 (sICAM-1), Soluble Vascular Cell Adhesion Molecule-1 (sVCAM-1), total plasminogen activator inhibitor (tPAI-1). Statistical significance was set at p < 0.05. Both sVCAM-1 and tPAI increased significantly more in the 1000 mg vs. 300 mg and placebo groups. Other biomarkers (300 mg vs. 1000 mg vs. placebo: oxLDL, sEselectin-1 and sICAM-1) followed the same trend toward higher levels in the 1000 mg group compared to the 300 mg and placebo groups, without reaching statistical significance. This pilot project suggests that a higher dose of RSV may increase the levels of CVD risk biomarkers in overweight older adults. Given no change in the CVD risk biomarkers in response to a lower dose, future studies should test the effects of different doses of RSV to evaluate potential detrimental effects of higher doses on CVD biomarkers and measures of cardiovascular function in older adults at risk for CVD.
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Affiliation(s)
- R T Mankowski
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA.
| | - L You
- Department of Biostatistics, University of Florida, Gainesville, FL, USA
| | - T W Buford
- Department of Medicine, UAB School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - C Leeuwenburgh
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA
| | - T M Manini
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA
| | - S Schneider
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA
| | - P Qiu
- Department of Biostatistics, University of Florida, Gainesville, FL, USA
| | - S D Anton
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA
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13
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Wang H, Qin J, Ding X, Chen MC, Chen S, You X, He YM, Jiang X, You L, Wang Z, Schneider C, Renema JJ, Höfling S, Lu CY, Pan JW. Boson Sampling with 20 Input Photons and a 60-Mode Interferometer in a 10^{14}-Dimensional Hilbert Space. Phys Rev Lett 2019; 123:250503. [PMID: 31922765 DOI: 10.1103/physrevlett.123.250503] [Citation(s) in RCA: 80] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 11/19/2019] [Indexed: 05/24/2023]
Abstract
Quantum computing experiments are moving into a new realm of increasing size and complexity, with the short-term goal of demonstrating an advantage over classical computers. Boson sampling is a promising platform for such a goal; however, the number of detected single photons is up to five so far, limiting these small-scale implementations to a proof-of-principle stage. Here, we develop solid-state sources of highly efficient, pure, and indistinguishable single photons and 3D integration of ultralow-loss optical circuits. We perform experiments with 20 pure single photons fed into a 60-mode interferometer. In the output, we detect up to 14 photons and sample over Hilbert spaces with a size up to 3.7×10^{14}, over 10 orders of magnitude larger than all previous experiments, which for the first time enters into a genuine sampling regime where it becomes impossible to exhaust all possible output combinations. The results are validated against distinguishable samplers and uniform samplers with a confidence level of 99.9%.
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Affiliation(s)
- Hui Wang
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, People's Republic of China
- Shanghai Branch, CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai 201315, People's Republic of China
| | - Jian Qin
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, People's Republic of China
- Shanghai Branch, CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai 201315, People's Republic of China
| | - Xing Ding
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, People's Republic of China
- Shanghai Branch, CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai 201315, People's Republic of China
| | - Ming-Cheng Chen
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, People's Republic of China
- Shanghai Branch, CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai 201315, People's Republic of China
| | - Si Chen
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, People's Republic of China
- Shanghai Branch, CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai 201315, People's Republic of China
| | - Xiang You
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, People's Republic of China
- Shanghai Branch, CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai 201315, People's Republic of China
| | - Yu-Ming He
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, People's Republic of China
- Shanghai Branch, CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai 201315, People's Republic of China
| | - Xiao Jiang
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, People's Republic of China
- Shanghai Branch, CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai 201315, People's Republic of China
| | - L You
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences, 865 Changning Road, Shanghai 200050, China
| | - Z Wang
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences, 865 Changning Road, Shanghai 200050, China
| | - C Schneider
- Technische Physik, Physikalisches Instität and Wilhelm Conrad Röntgen-Center for Complex Material Systems, Universitat Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Jelmer J Renema
- Adaptive Quantum Optics Group, Mesa+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, Netherlands
| | - Sven Höfling
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, People's Republic of China
- Technische Physik, Physikalisches Instität and Wilhelm Conrad Röntgen-Center for Complex Material Systems, Universitat Würzburg, Am Hubland, D-97074 Würzburg, Germany
- SUPA, School of Physics and Astronomy, University of St. Andrews, St. Andrews KY16 9SS, United Kingdom
| | - Chao-Yang Lu
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, People's Republic of China
- Shanghai Branch, CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai 201315, People's Republic of China
| | - Jian-Wei Pan
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, People's Republic of China
- Shanghai Branch, CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai 201315, People's Republic of China
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14
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Zhao R, Xu Z, Li B, Chen T, Mei N, Wang C, Zhou Z, You L, Wu C, Wang X, Tang S. A comparative study on agarose acetate and PDLLA scaffold for rabbit femur defect regeneration. ACTA ACUST UNITED AC 2019; 14:065007. [PMID: 31422950 DOI: 10.1088/1748-605x/ab3c1b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The development of degradable polymer scaffolds is a key issue in bone regeneration. Poly(D, L-lactide) (PDLLA) and its derivatives have usually been applied to the construction of degradable scaffolds, but these scaffolds had problems with acidic degradation products and quick loss of mechanic strength during the later degradation, which usually led to scaffold collapse and cavity formation because of the slower rate of bone regeneration. In the present paper, a polysaccharide derivative, agarose acetate (AGA), was synthesized and a novel porous AGA scaffold was successfully developed through a salt-leaching process. The AGA scaffold had over 90% porosity without swelling in water, and compared to collapse and acidic products of PDLLA scaffold during degradation, the AGA scaffold maintained a stable morphology and a nearly neutral pH value over 18 months' degradation in PBS. A bone mesenchymal stem cells (BMSCs) adhesion and proliferation experiment showed that more cells adhered to the AGA scaffold than to the PDLLA scaffold. A subcutaneous implant test showed that the AGA scaffold slowly degraded and did not cause an inflammatory response surrounding the implantation lesion site. AGA scaffold was implanted into femur defects in New Zealand white rabbits to test its in vivo performance. Results indicated that the AGA scaffold accelerated the process of bone regeneration compared to the PDLLA group and, with time, new bone was formed from the margin toward the center of the scaffolds, and the scaffold left in place retained its porous structure without collapsing. Meanwhile, the AGA scaffold showed a low degradation rate and kept its shape during the in vivo degradation compared to the PDLLA scaffold. This performance could have the benefit of integrated regenerative bone being formed instead of cavities due to the quickly degraded scaffold disappearing. These results demonstrate that the AGA scaffold has significant potential in bone regeneration applications.
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Affiliation(s)
- Ruifang Zhao
- Biomedical Engineering Institute, Jinan University, Guangzhou 510632 People's Republic of China
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15
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Anderson WB, Seager R, Baethgen W, Cane M, You L. Synchronous crop failures and climate-forced production variability. Sci Adv 2019; 5:eaaw1976. [PMID: 31281890 PMCID: PMC6609162 DOI: 10.1126/sciadv.aaw1976] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Accepted: 05/24/2019] [Indexed: 05/30/2023]
Abstract
Large-scale modes of climate variability can force widespread crop yield anomalies and are therefore often presented as a risk to food security. We quantify how modes of climate variability contribute to crop production variance. We find that the El Niño Southern Oscillation (ENSO), the Indian Ocean Dipole (IOD), tropical Atlantic variability (TAV), and the North Atlantic Oscillation (NAO) together account for 18, 7, and 6% of globally aggregated maize, soybean, and wheat production variability, respectively. The lower fractions of global-scale soybean and wheat production variability result from substantial but offsetting climate-forced production anomalies. All climate modes are important in at least one region studied. In 1983, ENSO, the only mode capable of forcing globally synchronous crop failures, was responsible for the largest synchronous crop failure in the modern historical record. Our results provide the basis for monitoring, and potentially predicting, simultaneous crop failures.
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Affiliation(s)
- W. B. Anderson
- Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, USA
- International Research Institute for Climate and Society, Palisades, NY, USA
- Department of Earth and Environmental Sciences, Columbia University, Palisades, NY, USA
| | - R. Seager
- Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, USA
| | - W. Baethgen
- International Research Institute for Climate and Society, Palisades, NY, USA
| | - M. Cane
- Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, USA
| | - L. You
- International Food Policy Research Institute, Washington, DC, USA
- Macro Agriculture Research Institute and College of Economics and Management, Huazhong Agricultural University, Wuhan, Hubei, China
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16
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Luo Y, He Q, Zhang P, An C, Zhang A, Li X, You L, Liu C. Hepatoprotective and antioxidant potential of radish seed aqueous extract on cadmium-induced hepatotoxicity and oxidative stress in mice. Pharmacogn Mag 2019. [DOI: 10.4103/pm.pm_365_18] [Citation(s) in RCA: 5] [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: 11/04/2022] Open
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17
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Lee A, You L, Li Z, Oh S, Alcorn M, Zhu J, Fisher-Heffernan R, Regnault T, Huber L, Karrow N. PSX-6 Effect of dietary microalgae and fish oil on the nursery pig acute-phase response. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.1074] [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)
- A Lee
- University of Guelph,Guelph, ON, Canada
| | - L You
- University of Guelph,Guelph, ON, Canada
| | - Z Li
- University of Guelph,Guelph, ON, Canada
| | - S Oh
- University of Guelph,Guelph, ON, Canada
| | - M Alcorn
- University of Guelph,Guelph, ON, Canada
| | - J Zhu
- University of Guelph,Guelph, ON, Canada
| | | | | | - L Huber
- Department of Animal Biosciences / University of Guelph,Guelph, ON, Canada
| | - N Karrow
- University of Guelph,Guelph, ON, Canada
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18
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He Q, Li Y, Li H, Zhang P, Zhang A, You L, Wu H, Xiao P, Liu J. Hypolipidemic and antioxidant potential of bitter gourd (Momordica charantia L.) leaf in mice fed on a high-fat diet. Pak J Pharm Sci 2018; 31:1837-1843. [PMID: 30150178] [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: 06/08/2023]
Abstract
The purpose of this study was to investigate the antioxidant and hypolipidemic potential of bitter gourd (BG) leaf ethanol extract (LE) in mice fed a high-fat diet (HFD). Fifty mice were randomly separated into five groups with 10 animals of each group. The animals received normal diet (NC), HFD diet (HF), 200mg/kg/day LE with HFD (LLE), 400 mg/kg/day LE with HFD (MLE), 800mg/kg/day LE with HFD (HLE), respectively. After six weeks, HF group showed meaningfully (P<0.05) increased body weight, fat index, serum lipid and oxidant stress compared to NC group. However, serum TC, TG and LDL-c concentrations were lower in all LE treated groups compared with HF group (P<0.05). In addition to LLE group, HLD-c levels in LE treated groups were higher that that in HF group (P<0.05). Moreover, LE attenuated significantly (P<0.05) the MDA content and elevated the SOD activities of the liver tissues in a dose effect relationship. The histopathological examination confirmed the hepatoprotective effect of LE against liver damage induced by HFD. These findings illustrate that bitter gourd leaves may be valuable for preventing hyperlipidemia and oxidative stress induced by HFD.
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Affiliation(s)
- Qingfeng He
- Department of Food Science and Biotechnology, Tianjin Agricultural University, Tianjin, China
| | - Yanjie Li
- Department of Computer and Information Engineering, Tianjin Agricultural University, Tianjin, China
| | - Hong Li
- Department of Health Management, Fujian Health College, Fuzhou, Fujian, China
| | - Pingping Zhang
- Department of Food Science and Biotechnology, Tianjin Agricultural University, Tianjin, China
| | - Ailin Zhang
- Department of Food Science and Biotechnology, Tianjin Agricultural University, Tianjin, China
| | - Lingling You
- Department of Food Science and Biotechnology, Tianjin Agricultural University, Tianjin, China
| | - Haiqing Wu
- Department of Food Science and Biotechnology, Tianjin Agricultural University, Tianjin, China
| | - Ping Xiao
- Department of Food Science and Biotechnology, Tianjin Agricultural University, Tianjin, China
| | - Jinfu Liu
- Department of Food Science and Biotechnology, Tianjin Agricultural University, Tianjin, China
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19
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Zhang SS, Gao W, Cheng H, You L, Liu HP. Symmetry-Breaking Assisted Landau-Zener Transitions in Rydberg Atoms. Phys Rev Lett 2018; 120:063203. [PMID: 29481261 DOI: 10.1103/physrevlett.120.063203] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 05/12/2017] [Indexed: 06/08/2023]
Abstract
We report the observation of a controlled Landau-Zener transition (LZT) in Rydberg atoms by breaking the symmetry of the underlying Hamiltonian. For a nonhydrogenic Rydberg atom inside a changing electric (F) field, a LZT occurs between the avoided crossing energy levels of neighboring Rydberg states only for a sufficiently high changing rate. If a transverse magnetic (B) field is applied as we implement, the atomic level symmetry is broken, which causes the Stark manifolds denoted by a different |m| (m is the magnetic quantum number) to interact with each other. The mixed state levels end up pushing the adiabatically repelled target states closer and additionally they serve as stepping stones for the sequential LZTs between the neighboring sublevels. Such a feature significantly decreases the changing rate required for an efficient LZT inside a pure electric field. We report experimental observations that support the above scenario. It opens a versatile approach for engineering a controlled LZT in more general systems.
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Affiliation(s)
- S S Zhang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - W Gao
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - H Cheng
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - L You
- State Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, People's Republic of China
- Collaborative Innovation Center of Quantum Matter, Beijing 100084, China
| | - H P Liu
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
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20
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Pookpanratana S, Goetz K, Bittle E, Haneef H, You L, Hacker C, Robey S, Jurchescu O, Ovsyannikov R, Giangrisostomi E. Electronic properties and structure of single crystal perylene. Org Electron 2018; 61:10.1016/j.orgel.2018.05.035. [PMID: 30983924 PMCID: PMC6459418 DOI: 10.1016/j.orgel.2018.05.035] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The transport properties of electronic devices made from single crystalline molecular semiconductors typically outperform those composed of thin-films of the same material. To further understand the superiority of these extrinsic device properties, an understanding of the intrinsic electronic structure and properties of the organic semiconductor is necessary. An investigation of the electronic structure and properties of single crystal α-phase perylene (C20H12), a five-ringed aromatic molecule, is presented using angle-resolved ultraviolet photoemission, x-ray photoelectron spectroscopy (XPS), and field-effect transistor measurements. Key aspects of the electronic structure of single crystal α-perylene critical to charge transport are determined, including the energetic location of the highest occupied molecular orbital (HOMO), the HOMO bandwidth, and surface work function. In addition, using high resolution XPS, we can distinguish between inequivalent carbon atoms within the perylene crystal and, from the shake-up satellite structure in XPS, gain insight into the intramolecular properties in α-perylene. From the device measurements, the charge carrier mobility of α-perylene is found to depend on the device structure and the choice of dielectric, with values in the range of 10-3 cm2 V-1 s-1.
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Affiliation(s)
- S.J. Pookpanratana
- Engineering Physics Division, National Institute of Standards and Technology (NIST), USA
| | - K.P. Goetz
- Department of Physics, Wake Forest University, USA
- Physical Chemistry Institute, Universität Heidelberg, Germany
| | - E.G. Bittle
- Engineering Physics Division, National Institute of Standards and Technology (NIST), USA
| | - H. Haneef
- Department of Physics, Wake Forest University, USA
| | - L. You
- Engineering Physics Division, National Institute of Standards and Technology (NIST), USA
- Theiss Research, USA
| | - C.A. Hacker
- Engineering Physics Division, National Institute of Standards and Technology (NIST), USA
| | - S.W. Robey
- Materials Measurement Science Division, NIST, USA
| | | | - R. Ovsyannikov
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin (HZB) für Materialien und Energie, Germany
| | - E. Giangrisostomi
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin (HZB) für Materialien und Energie, Germany
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21
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Middleton K, Al-Dujaili S, Mei X, Günther A, You L. Microfluidic co-culture platform for investigating osteocyte-osteoclast signalling during fluid shear stress mechanostimulation. J Biomech 2017; 59:35-42. [PMID: 28552413 DOI: 10.1016/j.jbiomech.2017.05.012] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Revised: 05/12/2017] [Accepted: 05/13/2017] [Indexed: 11/30/2022]
Abstract
Bone cells exist in a complex environment where they are constantly exposed to numerous dynamic biochemical and mechanical stimuli. These stimuli regulate bone cells that are involved in various bone disorders, such as osteoporosis. Knowledge of how these stimuli affect bone cells have been utilised to develop various treatments, such as pharmaceuticals, hormone therapy, and exercise. To investigate the role that bone loading has on these disorders in vitro, bone cell mechanotransduction studies are typically performed using parallel plate flow chambers (PPFC). However, these chambers do not allow for dynamic cellular interactions among different cell populations to be investigated. We present a microfluidic approach that exposes different cell populations, which are located at physiologically relevant distances within adjacent channels, to different levels of fluid shear stress, and promotes cell-cell communication between the different channels. We employed this microfluidic system to assess mechanically regulated osteocyte-osteoclast communication. Osteoclast precursors (RAW264.7 cells) responded to cytokine gradients (e.g., RANKL, OPG, PGE-2) developed by both mechanically stimulated (fOCY) and unstimulated (nOCY) osteocyte-like MLO-Y4 cells simultaneously. Specifically, we observed increased osteoclast precursor cell densities and osteoclast differentiation towards nOCY. We also used this system to show an increased mechanoresponse of osteocytes when in co-culture with osteoclasts. We envision broad applicability of the presented approach for microfluidic perfusion co-culture of multiple cell types in the presence of fluid flow stimulation, and as a tool to investigate osteocyte mechanotransduction, as well as bone metastasis extravasation. This system could also be applied to any multi-cell population cross-talk studies that are typically performed using PPFCs (e.g. endothelial cells, smooth muscle cells, and fibroblasts).
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Affiliation(s)
- K Middleton
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, 164 College Street, Toronto, Ontario M5S 3G9, Canada
| | - S Al-Dujaili
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, 164 College Street, Toronto, Ontario M5S 3G9, Canada
| | - X Mei
- Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, Ontario M5S 3G8, Canada
| | - A Günther
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, 164 College Street, Toronto, Ontario M5S 3G9, Canada; Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, Ontario M5S 3G8, Canada
| | - L You
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, 164 College Street, Toronto, Ontario M5S 3G9, Canada; Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, Ontario M5S 3G8, Canada.
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22
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Wu LN, Luo XY, Xu ZF, Ueda M, Wang R, You L. Harmonic trap resonance enhanced synthetic atomic spin-orbit coupling. Sci Rep 2017; 7:46756. [PMID: 28447670 PMCID: PMC5406833 DOI: 10.1038/srep46756] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 01/11/2017] [Accepted: 03/21/2017] [Indexed: 11/09/2022] Open
Abstract
Spin-orbit coupling (SOC) plays an essential role in many exotic and interesting phenomena in condensed matter physics. In neutral-atom-based quantum simulations, synthetic SOC constitutes a key enabling element. The strength of SOC realized so far is limited by various reasons or constraints. This work reports tunable SOC synthesized with a gradient magnetic field (GMF) for atoms in a harmonic trap. Nearly ten-fold enhancement is observed when the GMF is modulated near the harmonic-trap resonance in comparison with the free-space situation. A theory is developed that well explains the experimental results. Our work offers a clear physical insight into and analytical understanding of how to tune the strength of atomic SOC synthesized with GMF using harmonic trap resonance.
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Affiliation(s)
- Ling-Na Wu
- State Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China
| | - Xin-Yu Luo
- State Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China
| | - Zhi-Fang Xu
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- MOE Key Laboratory of Fundamental Physical Quantities Measurements, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Masahito Ueda
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Ruquan Wang
- Institute of Physics, Chinese Academy of Sciences, Beijing 100080, Peoples Republic of China
- Collaborative Innovation Center of Quantum Matter, Beijing, China
| | - L. You
- State Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China
- Collaborative Innovation Center of Quantum Matter, Beijing, China
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Karrow NA, Oh SY, Lee A, Li Z, You L, Fisher RE, de Lange CFM. 144 Pre-programming of the immune system to enhance immunological capacity of offspring. J Anim Sci 2017. [DOI: 10.2527/asasmw.2017.12.144] [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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Song X, Hu T, Liang C, Long H, Zhou L, Song W, You L, Wu ZS, Liu JW. Direct regeneration of cathode materials from spent lithium iron phosphate batteries using a solid phase sintering method. RSC Adv 2017. [DOI: 10.1039/c6ra27210j] [Citation(s) in RCA: 131] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
A direct regeneration of cathode materials from spent LiFePO4 batteries using a solid phase sintering method has been proposed in this article.
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Affiliation(s)
- X. Song
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials
- Ministry of Educational Key Laboratory for the Synthesis and Application of Organic Functional
- Molecules & College of Chemistry and Chemical Engineering
- Hubei University
- Wuhan
| | - T. Hu
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials
- Ministry of Educational Key Laboratory for the Synthesis and Application of Organic Functional
- Molecules & College of Chemistry and Chemical Engineering
- Hubei University
- Wuhan
| | - C. Liang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials
- Ministry of Educational Key Laboratory for the Synthesis and Application of Organic Functional
- Molecules & College of Chemistry and Chemical Engineering
- Hubei University
- Wuhan
| | - H. L. Long
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials
- Ministry of Educational Key Laboratory for the Synthesis and Application of Organic Functional
- Molecules & College of Chemistry and Chemical Engineering
- Hubei University
- Wuhan
| | - L. Zhou
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials
- Ministry of Educational Key Laboratory for the Synthesis and Application of Organic Functional
- Molecules & College of Chemistry and Chemical Engineering
- Hubei University
- Wuhan
| | - W. Song
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials
- Ministry of Educational Key Laboratory for the Synthesis and Application of Organic Functional
- Molecules & College of Chemistry and Chemical Engineering
- Hubei University
- Wuhan
| | - L. You
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials
- Ministry of Educational Key Laboratory for the Synthesis and Application of Organic Functional
- Molecules & College of Chemistry and Chemical Engineering
- Hubei University
- Wuhan
| | - Z. S. Wu
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials
- Ministry of Educational Key Laboratory for the Synthesis and Application of Organic Functional
- Molecules & College of Chemistry and Chemical Engineering
- Hubei University
- Wuhan
| | - J. W. Liu
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials
- Ministry of Educational Key Laboratory for the Synthesis and Application of Organic Functional
- Molecules & College of Chemistry and Chemical Engineering
- Hubei University
- Wuhan
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25
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Du Y, You L, Li Z, Liu C, Liu Z, Zhao Y. 244P NOP14 promotes invasion and metastasis by maintaining mutant p53-induced oncogenic signaling in pancreatic cancer. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw582.025] [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: 11/14/2022] Open
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26
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Marusak KE, Feng Y, Eben CF, Payne ST, Cao Y, You L, Zauscher S. Cadmium sulphide quantum dots with tunable electronic properties by bacterial precipitation. RSC Adv 2016; 6:76158-76166. [PMID: 28435671 DOI: 10.1039/c6ra13835g] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We present a new method to fabricate semiconducting, transition metal nanoparticles (NPs) with tunable bandgap energies using engineered Escherichia coli. These bacteria overexpress the Treponema denticola cysteine desulfhydrase gene to facilitate precipitation of cadmium sulphide (CdS) NPs. Analysis with transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy reveal that the bacterially precipitated NPs are agglomerates of mostly quantum dots, with diameters that can range from 3 to 15 nm, embedded in a carbon-rich matrix. Additionally, conditions for bacterial CdS precipitation can be tuned to produce NPs with bandgap energies that range from quantum-confined to bulk CdS. Furthermore, inducing precipitation at different stages of bacterial growth allows for control over whether the precipitation occurs intra- or extracellularly. This control can be critically important in utilizing bacterial precipitation for the environmentally-friendly fabrication of functional, electronic and catalytic materials. Notably, the measured photoelectrochemical current generated by these NPs is comparable to values reported in the literature and higher than that of synthesized chemical bath deposited CdS NPs. This suggests that bacterially precipitated CdS NPs have potential for applications ranging from photovoltaics to photocatalysis in hydrogen evolution.
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Affiliation(s)
- K E Marusak
- Department of Mechanical Engineering & Materials Science, 144 Hudson Hall, Box 90300 Durham, NC 27708, United States
| | - Y Feng
- Department of Mechanical Engineering & Materials Science, 144 Hudson Hall, Box 90300 Durham, NC 27708, United States
| | - C F Eben
- Department of Biomedical Engineering, Duke University, 101 Science Drive, Durham NC 27708, United States
| | - S T Payne
- Department of Biomedical Engineering, Duke University, 101 Science Drive, Durham NC 27708, United States
| | - Y Cao
- Department of Biomedical Engineering, Duke University, 101 Science Drive, Durham NC 27708, United States
| | - L You
- Department of Biomedical Engineering, Duke University, 101 Science Drive, Durham NC 27708, United States
| | - S Zauscher
- Department of Mechanical Engineering & Materials Science, 144 Hudson Hall, Box 90300 Durham, NC 27708, United States
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Wang X, Hong X, Pang H, Dai H, You L, Wu W, Zhao Y. Selecting optimal surgical procedures for intraductal papillary mucinous neoplasm (IPMN): An analysis based on the Surveillance, Epidemiology, and End Result registry database. Eur J Surg Oncol 2016; 42:1526-32. [PMID: 27436161 DOI: 10.1016/j.ejso.2016.06.402] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Revised: 06/13/2016] [Accepted: 06/22/2016] [Indexed: 12/15/2022] Open
Abstract
INTRODUCTION Intraductal papillary mucinous neoplasm (IPMN) is a field defect disease of pancreas that has malignant potential. Many studies have recommended surgery as the preferred treatment. We investigated whether a total pancreatectomy (TP) can improve patient prognosis compared to a pancreatoduodenectomy (PD) and the indications for each approach. PATIENTS AND METHODS We obtained data of 548 malignant IPMN patients who underwent either a TP or a PD from SEER database. The survival rates were analyzed using the Kaplan-Meier method and a Cox regression model. Cases were subdivided to investigate the advantages of each procedure. RESULTS The surgical procedures (PD and TP) did not significantly affect either cancer-specific survival (CSS) times or overall survival (OS) times in both Kaplan-Meier analysis and Cox regression (Kaplan-Meier: PCSS = 0.919, POS = 0.996; Cox: PCSS = 0.735, POS = 0.820). In the subgroup analyses, patients in stage T4 and AJCC stage III in the TP group had a longer survival time than did those in the PD group (33 months vs 14 months), but not significant (T4: PCSS = 0.124, AJCC III: PCSS = 0.102). In addition, PD had the trend to be better for poorly differentiated patients (Pos = 0.055) and older patients. CONCLUSION TP did not offer any significant OS and CSS benefits as compared to PD. However, for patients in stage T4 and AJCC stage III, TP may extend survival time in some degree. In older or histologically poorly differentiated patients, PD may be preferable to TP. The results are rational, but still warrant further verification due to limited sample volumes of specific subgroups.
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Affiliation(s)
- X Wang
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730, China
| | - X Hong
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730, China
| | - H Pang
- Central Research Laboratory, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100730, China; Clinical Epidemiology Unit, International Epidemiology Network, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100730, China
| | - H Dai
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730, China
| | - L You
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730, China
| | - W Wu
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730, China.
| | - Y Zhao
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730, China.
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28
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You L, Ma L, Zhao W, Zhao Y, Dai M. Emerging role of tumor markers and biochemistry in the preoperative invasive assessment of intraductal papillary mucinous neoplasm of the pancreas. Clin Chim Acta 2016; 454:89-93. [DOI: 10.1016/j.cca.2015.12.036] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Revised: 12/09/2015] [Accepted: 12/30/2015] [Indexed: 01/06/2023]
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29
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Luo X, Wu L, Chen J, Guan Q, Gao K, Xu ZF, You L, Wang R. Tunable atomic spin-orbit coupling synthesized with a modulating gradient magnetic field. Sci Rep 2016; 6:18983. [PMID: 26752786 PMCID: PMC4707438 DOI: 10.1038/srep18983] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Accepted: 11/30/2015] [Indexed: 11/10/2022] Open
Abstract
We report the observation of synthesized spin-orbit coupling (SOC) for ultracold spin-1 87Rb atoms. Different from earlier experiments where a one dimensional (1D) atomic SOC of pseudo-spin-1/2 is synthesized with Raman laser fields, the scheme we demonstrate employs a gradient magnetic field (GMF) and ground-state atoms, thus is immune to atomic spontaneous emission. The strength of SOC we realize can be tuned by changing the modulation amplitude of the GMF, and the effect of the SOC is confirmed through the studies of: 1) the collective dipole oscillation of an atomic condensate in a harmonic trap after the synthesized SOC is abruptly turned on; and 2) the minimum energy state at a finite adiabatically adjusted momentum when SOC strength is slowly ramped up. The condensate coherence is found to remain very good after driven by modulating GMFs. Our scheme presents an alternative means for studying interacting many-body systems with synthesized SOC.
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Affiliation(s)
- Xinyu Luo
- State Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China
| | - Lingna Wu
- State Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China
| | - Jiyao Chen
- State Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China
| | - Qing Guan
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
| | - Kuiyi Gao
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
| | - Zhi-Fang Xu
- MOE Key Laboratory of Fundamental Physical Quantities Measurements, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - L You
- State Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China.,Collaborative Innovation Center of Quantum Matter, Beijing, China
| | - Ruquan Wang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China.,Collaborative Innovation Center of Quantum Matter, Beijing, China
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Zhang K, Li YP, Huang GH, You L, Jin SW. Modeling for regional ecosystem sustainable development under uncertainty--A case study of Dongying, China. Sci Total Environ 2015; 533:462-475. [PMID: 26179784 DOI: 10.1016/j.scitotenv.2015.06.128] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Revised: 06/25/2015] [Accepted: 06/28/2015] [Indexed: 06/04/2023]
Abstract
In this study, a superiority-inferiority two-stage stochastic programming (STSP) method is developed for planning regional ecosystem sustainable development. STSP can tackle uncertainties expressed as fuzzy sets and probability distributions; it can be used to analyze various policy scenarios that are associated with different levels of economic penalties when the promised targets are violated. STSP is applied to a real case of planning regional ecosystem sustainable development in the City of Dongying, where ecosystem services valuation approaches are incorporated within the optimization process. Regional ecosystem can provide direct and indirect services and intangible benefits to local economy. Land trading mechanism is introduced for planning the regional ecosystem's sustainable development, where wetlands are buyers who would protect regional ecosystem components and self-organization and maintain its integrity. Results of regional ecosystem activities, land use patterns, and land trading schemes have been obtained. Results reveal that, although large-scale reclamation projects can bring benefits to the local economy development, they can also bring with negative effects to the coastal ecosystem; among all industry activities oil field is the major contributor with a large number of pollutant discharges into local ecosystem. Results also show that uncertainty has an important role in successfully launching such a land trading program and trading scheme can provide more effective manner to sustain the regional ecosystem. The findings can help decision makers to realize the sustainable development of ecological resources in the process of rapid industrialization, as well as the integration of economic and ecological benefits.
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Affiliation(s)
- K Zhang
- MOE Key Laboratory of Regional Energy Systems Optimization, S-C Resources and Environmental Research Academy, North China Electric Power University, Beijing 102206, China.
| | - Y P Li
- MOE Key Laboratory of Regional Energy Systems Optimization, S-C Resources and Environmental Research Academy, North China Electric Power University, Beijing 102206, China.
| | - G H Huang
- MOE Key Laboratory of Regional Energy Systems Optimization, S-C Resources and Environmental Research Academy, North China Electric Power University, Beijing 102206, China.
| | - L You
- MOE Key Laboratory of Regional Energy Systems Optimization, S-C Resources and Environmental Research Academy, North China Electric Power University, Beijing 102206, China.
| | - S W Jin
- MOE Key Laboratory of Regional Energy Systems Optimization, S-C Resources and Environmental Research Academy, North China Electric Power University, Beijing 102206, China.
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Zhang ZL, Liao EY, Xia WB, Lin H, Cheng Q, Wang L, Hao YQ, Chen DC, Tang H, De Peng Y, You L, He L, Hu ZH, Song CL, Wei F, Wang J, Zhang L, Santora AC. Erratum to: Alendronate sodium/vitamin D₃ combination tablet versus calcitriol for osteoporosis in Chinese postmenopausal women: a 6-month, randomized, open-label, active-comparator-controlled study with a 6-month extension. Osteoporos Int 2015; 26:2719-20. [PMID: 26377424 PMCID: PMC4713924 DOI: 10.1007/s00198-015-3247-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Z L Zhang
- Metabolic Bone Disease and Genetic Research Unit, Department of Osteoporosis and Bone Disease, The Sixth People's Hospital, Shanghai Jiaotong University, 600 Yi-Shan Road, Shanghai, 200233, China.
| | - E Y Liao
- The Second Xiangya Hospital, Central South University, Changsha, China
| | - W B Xia
- Peking Union Medical College Hospital, Beijing, China
| | - H Lin
- Nanjing Drum Tower Hospital, Nanjing, China
| | - Q Cheng
- Huadong Hospital Affiliated to Fudan University, Shanghai, China
| | - L Wang
- Tianjin Hospital, Tianjin, China
| | - Y Q Hao
- Shanghai Ninth People's Hospital, Shanghai, China
| | - D C Chen
- West China Hospital, West China School of Medicine, Sichuan University, Chengdu, China
| | - H Tang
- Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Y De Peng
- Shanghai First People's Hospital, Shanghai, China
| | - L You
- Shanghai First People's Hospital, Shanghai, China
| | - L He
- Beijing Jishuitan Hospital, Beijing, China
| | - Z H Hu
- Peking University People's Hospital, Beijing, China
| | - C L Song
- Peking University Third Hospital, Beijing, China
| | - F Wei
- Global Medical Affairs, Merck Sharp & Dohme China, Shanghai, China
| | - J Wang
- Global Medical Affairs, Merck Sharp & Dohme China, Shanghai, China
| | - L Zhang
- Global Medical Affairs, Merck Sharp & Dohme China, Shanghai, China
| | - A C Santora
- Merck Research Laboratories, Rahway, NJ, USA
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Liang W, Gao L, Li N, Wang B, Wang L, Wang Y, Yang H, You L, Hou J, Chen S, Zhu H, Jiang Y, Pan H. Efficacy and Safety of Bromocriptine-QR in Type 2 Diabetes: A Systematic Review and Meta-Analysis. Horm Metab Res 2015; 47:805-12. [PMID: 26332757 DOI: 10.1055/s-0035-1559684] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Bromocriptine-QR (quick release) is a novel treatment for type 2 diabetes. The objective of this study is to assess the efficacy and safety of bromocriptine-QR in adults with type 2 diabetes mellitus based on randomized controlled trials published in peer-reviewed journals or as abstracts. We performed a comprehensive literature search of MEDLINE, Pubmed, Web of Science, EMBASE, and the Cochrane Library up to May 2015. Randomized controlled trials of bromocriptine-QR therapy in type 2 diabetes mellitus were eligible. Two reviewers independently assessed the eligibility of trials based on predefined inclusion criteria. Information was collected concerning basic study data, patient characteristics, efficacy and safety outcomes, and methodological quality. Bromocriptine-QR add-on therapy lowered hemoglobin A1c compared with placebo (weighted mean difference, - 6.52 mmol/mol; 95% CI, - 8.07 to - 4.97 mmol/mol). Bromocriptine-QR exhibited an increase in achieving an HbA1c level ≤ 53 mmol/mol (≤ 7.0%) (32.0 vs. 9.5%; odds ratio, 4.57; 95% CI, 2.42-8.62). Fasting plasma glucose was reduced with bromocriptine-QR compared with placebo (weighted mean difference,-1.04 mmol/l; 95% CI,-1.49 to-0.59 mmol/l). Moreover, bromocriptine-QR had neutral effects on postprandial glycemia, Body Mass Index (BMI), and lipid profile. Bromocriptine-QR had more gastrointestinal side effects of nausea and vomiting. Bromocriptine-QR had no increased risk of hypoglycemia, hypotension, or cardiovascular effects. Bromocriptine-QR therapy offers an alternative option to currently available antidiabetic agents for type 2 diabetes mellitus adults. Neither hypoglycemia nor other metabolic changes occur with this drug. More data for long-term efficacy and safety are needed for further observation.
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Affiliation(s)
- W Liang
- Key Laboratory of Endocrinology of Ministry of Health, Department of Endocrinology, Peking Union Medical College Hospital, Peking Union Medical College, Beijing, China
| | - L Gao
- Key Laboratory of Endocrinology of Ministry of Health, Department of Endocrinology, Peking Union Medical College Hospital, Peking Union Medical College, Beijing, China
| | - N Li
- Key Laboratory of Endocrinology of Ministry of Health, Department of Endocrinology, Peking Union Medical College Hospital, Peking Union Medical College, Beijing, China
| | - B Wang
- School of Public Health, Peking Union Medical College, Beijing, China
| | - L Wang
- Key Laboratory of Endocrinology of Ministry of Health, Department of Endocrinology, Peking Union Medical College Hospital, Peking Union Medical College, Beijing, China
| | - Y Wang
- School of Public Health, Peking Union Medical College, Beijing, China
| | - H Yang
- Key Laboratory of Endocrinology of Ministry of Health, Department of Endocrinology, Peking Union Medical College Hospital, Peking Union Medical College, Beijing, China
| | - L You
- School of Public Health, Peking Union Medical College, Beijing, China
| | - J Hou
- Key Laboratory of Endocrinology of Ministry of Health, Department of Endocrinology, Peking Union Medical College Hospital, Peking Union Medical College, Beijing, China
| | - S Chen
- Key Laboratory of Endocrinology of Ministry of Health, Department of Endocrinology, Peking Union Medical College Hospital, Peking Union Medical College, Beijing, China
| | - H Zhu
- Key Laboratory of Endocrinology of Ministry of Health, Department of Endocrinology, Peking Union Medical College Hospital, Peking Union Medical College, Beijing, China
| | - Y Jiang
- School of Public Health, Peking Union Medical College, Beijing, China
| | - H Pan
- Key Laboratory of Endocrinology of Ministry of Health, Department of Endocrinology, Peking Union Medical College Hospital, Peking Union Medical College, Beijing, China
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Zhang ZL, Liao EY, Xia WB, Lin H, Cheng Q, Wang L, Hao YQ, Chen DC, Tang H, De Peng Y, You L, He L, Hu ZH, Song CL, Wei F, Wang J, Zhang L, Santora AC. Alendronate sodium/vitamin D3 combination tablet versus calcitriol for osteoporosis in Chinese postmenopausal women: a 6-month, randomized, open-label, active-comparator-controlled study with a 6-month extension. Osteoporos Int 2015; 26:2365-74. [PMID: 25929192 PMCID: PMC4532726 DOI: 10.1007/s00198-015-3141-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Accepted: 04/13/2015] [Indexed: 12/13/2022]
Abstract
UNLABELLED This study compares efficacy of ALN/D5600 versus that of calcitriol in osteoporotic Chinese postmenopausal women. ALN/D5600 produced greater bone mineral density (BMD) increases, greater bone turnover marker decreases, and less vitamin D insufficiency. This study provided detailed clinical information regarding ALN/D5600 treatment versus calcitriol 0.25 μg/day. The study did not evaluate fracture risk. INTRODUCTION The aim of this study is to investigate efficacy of alendronate 70 mg/vitamin D3 5600 IU combination tablets (ALN/D5600) versus calcitriol in osteoporotic Chinese postmenopausal women. METHODS This study is a 6-month, randomized, open-label, active-comparator study with 6-month extension (clinicaltrials.gov number NCT01350934) in postmenopausal women aged >55 years with osteoporosis (low bone mineral density (BMD) with/without prior fragility fracture). Patients were randomized to ALN/D5600 once weekly or calcitriol 0.25 μg daily. The primary efficacy end point of the base study was percent change from baseline in lumbar spine BMD (month 6). Hypercalcemia and hypercalciuria were safety events of special interest. RESULTS A total of 219 patients (ALN/D5600 n = 111, calcitriol n = 108) were randomized. Baseline characteristics were similar, 30.3 % baseline 25-hydroxyvitamin D (25(OH)D) ≤15 ng/mL. At months 6 and 12, changes in lumbar spine BMD from baseline were 3.5 versus 1.6 % and 5.2 versus 2.3 % for ALN/D5600 versus calcitriol (between-group differences p < 0.001), respectively. Between-group differences for ALN/D5600 versus calcitriol were significant (p < 0.001) at months 6 and 12 for change from baseline in procollagen type 1 N-terminal propeptide (-59.1 versus -16.8 %, -68.1 versus -17.0 %) and serum C-telopeptides (-79.2 versus -27.2 %, -76.2 versus -24.2 %). Drug-related adverse events (AEs) and discontinuations due to drug-related AEs occurred in 15 (14.0 %) versus 8 (7.4 %) patients and 3 (2.8 %) versus 0 patients in the ALN/D5600 and calcitriol group, respectively. Hypercalciuria 12-month incidence (24-h urine Ca >300 mg) was 8.4 (ALN/D5600) versus 13.9 % (calcitriol) (p > 0.05). One patient (calcitriol) had hypercalcemia. CONCLUSIONS ALN/D5600 produced greater increases in lumbar spine BMD and greater decreases in bone turnover markers versus calcitriol in osteoporotic Chinese women. It is not known whether the greater increase in BMD results in fewer fractures. ALN/D5600 was generally well tolerated in Chinese patients.
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Affiliation(s)
- Z L Zhang
- Metabolic Bone Disease and Genetic Research Unit, Department of Osteoporosis and Bone Disease, The Sixth People's Hospital, Shanghai Jiaotong University, 600 Yi-Shan Road, Shanghai, 200233, China,
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Jo HH, Gao X, You L, Anslyn EV, Krische MJ. Application of a High-Throughput Enantiomeric Excess Optical Assay Involving a Dynamic Covalent Assembly: Parallel Asymmetric Allylation and Ee Sensing of Homoallylic Alcohols. Chem Sci 2015; 6:6747-6753. [PMID: 27014433 PMCID: PMC4800411 DOI: 10.1039/c5sc02416a] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Parallel synthesis and high-throughput ee screening.
Asymmetric Ir-catalyzed C–C coupling of primary alcohols with allyl-acetates, as described by Krische, to form chiral secondary homo-allylic alcohols were performed in parallel as a means to optimize the ee values thereof. Specifically, approximately 400 examples of this reaction were performed by varying the catalyst, added acids and bases, and starting reactants, to form 4-phenyl-1-butene-4-ol (1). The ee values for the transformations were determined in a high-throughput fashion using a 4-component assembly that creates a circular dichroism signal indicative of the extent of asymmetric induction. Further, a parallel and rapid quantitative TLC method measures the yield of each reaction, revealing which reactions give reliable ee values in the CD-based assay. Overall, the nearly 200 reactions whose ee values were determined could be quantitated in under two hours. Using a combination of the TLC method to measure yield with the CD-assay to measure ee values, several trends in reaction conditions were revealed. For example, it was found that the cyclometalated iridium catalyst modified by BINAP and m-nitro-p-cyano-benzoic acid delivered adduct 1 with the highest levels of enantiomeric enrichment (94%), whereas the corresponding SEGPHOS-modified catalyst gave a comparable yield but lower ee (91%). Most importantly, this study shows that supramolecular assemblies can report hundreds of ee values in a rapid and reliable fashion to analyze parallel synthesis routines.
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Affiliation(s)
- H H Jo
- Department of Chemistry, The University of Texas at Austin, Austin, Texas, 78712
| | - X Gao
- Department of Chemistry, The University of Texas at Austin, Austin, Texas, 78712
| | - L You
- Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, P.R. China
| | - E V Anslyn
- Department of Chemistry, The University of Texas at Austin, Austin, Texas, 78712
| | - M J Krische
- Department of Chemistry, The University of Texas at Austin, Austin, Texas, 78712
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Xiong GB, Zhang GN, Xiao Y, Niu BZ, Qiu HZ, Wu B, Lin GL, You L, Shu H. MicroRNA-219-5p functions as a tumor suppressor partially by targeting platelet-derived growth factor receptor alpha in colorectal cancer. Neoplasma 2015; 62:855-63. [PMID: 26458304 DOI: 10.4149/neo_2015_104] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Platelet-derived growth factor receptor (PDGFR) signaling pathway was involved in the progress of colorectal cancer (CRC). By using the bioinformatic system online, we found that PDGFRα is a potential target of miR-219-5p. However, the expression pattern and underlying mechanisms of miR-219-5p had not been elucidated in CRC. Herein, we first evaluated the expression of miR-219-5p in tumor tissues by real-time polymerase chain reaction. Next, we confirmed that PDGFRα is the target of miR-219-5p by using luciferase report. And then, we investigated the biological functions of miR-219-5p in vitro in cell proliferation and apoptosis as well as cell cycle by gain and loss of function strategies. Data shown that miR-219-5p is down-regulated in CRC tissues compared with the corresponding matched normal tissues. PDGFRα was a direct target of miR-219-5p. Overexpression of miR-219-5p could inhibit cell proliferation, promote cell apoptosis and induce cell cycle arrest at the G1 phase. Furthermore, miR-219-5p suppressed the activation of the phosphatidylinositol 3-kinase/Akt signaling pathway and downregulated G1 cell-cycle-related protein cyclin D1, cyclin-dependent kinase (CDK) 4, and CDK6. Taken together, our results demonstrate that miR-219-5p functions as a tumor suppressor partially by targeting PDGFRα in colorectal cancer.
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Xu J, Wang YQ, Li ZQ, Ling L, Zeng BS, You L, Chen YZ, Aslam AFM, Huang YP, Tan AJ. Functional characterization of the vitellogenin promoter in the silkworm, Bombyx mori. Insect Mol Biol 2014; 23:550-557. [PMID: 24828437 DOI: 10.1111/imb.12102] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Genetic transformation and genome editing technologies have been successfully established in the lepidopteran insect model, the domesticated silkworm, Bombyx mori, providing great potential for functional genomics and practical applications. However, the current lack of cis-regulatory elements in B. mori gene manipulation research limits further exploitation in functional gene analysis. In the present study, we characterized a B. mori endogenous promoter, Bmvgp, which is a 798-bp DNA sequence adjacent to the 5'-end of the vitellogenin gene (Bmvg). PiggyBac-based transgenic analysis shows that Bmvgp precisely directs expression of a reporter gene, enhanced green fluorescent protein (EGFP), in a sex-, tissue- and stage-specific manner. In transgenic animals, EGFP expression can be detected in the female fat body from larval-pupal ecdysis to the following pupal and adult stage. Furthermore, in vitro and in vivo experiments revealed that EGFP expression can be activated by 20-hydroxyecdysone, which is consistent with endogenous Bmvg expression. These data indicate that Bmvgp is an effective endogenous cis-regulatory element in B. mori.
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Affiliation(s)
- J Xu
- Key Laboratory of Insect Developmental and Evolutionary Biology, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai Institutes for Biological Sciences, Shanghai, China; University of Chinese Academy of Sciences, Beijing, China
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You L, Li Y, Huang G, Zhang J. Modeling regional ecosystem development under uncertainty – A case study for New Binhai District of Tianjin. Ecol Modell 2014. [DOI: 10.1016/j.ecolmodel.2014.06.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Marti X, Fina I, Frontera C, Liu J, Wadley P, He Q, Paull RJ, Clarkson JD, Kudrnovský J, Turek I, Kuneš J, Yi D, Chu JH, Nelson CT, You L, Arenholz E, Salahuddin S, Fontcuberta J, Jungwirth T, Ramesh R. Room-temperature antiferromagnetic memory resistor. Nat Mater 2014; 13:367-374. [PMID: 24464243 DOI: 10.1038/nmat3861] [Citation(s) in RCA: 146] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Accepted: 12/10/2013] [Indexed: 06/03/2023]
Abstract
The bistability of ordered spin states in ferromagnets provides the basis for magnetic memory functionality. The latest generation of magnetic random access memories rely on an efficient approach in which magnetic fields are replaced by electrical means for writing and reading the information in ferromagnets. This concept may eventually reduce the sensitivity of ferromagnets to magnetic field perturbations to being a weakness for data retention and the ferromagnetic stray fields to an obstacle for high-density memory integration. Here we report a room-temperature bistable antiferromagnetic (AFM) memory that produces negligible stray fields and is insensitive to strong magnetic fields. We use a resistor made of a FeRh AFM, which orders ferromagnetically roughly 100 K above room temperature, and therefore allows us to set different collective directions for the Fe moments by applied magnetic field. On cooling to room temperature, AFM order sets in with the direction of the AFM moments predetermined by the field and moment direction in the high-temperature ferromagnetic state. For electrical reading, we use an AFM analogue of the anisotropic magnetoresistance. Our microscopic theory modelling confirms that this archetypical spintronic effect, discovered more than 150 years ago in ferromagnets, is also present in AFMs. Our work demonstrates the feasibility of fabricating room-temperature spintronic memories with AFMs, which in turn expands the base of available magnetic materials for devices with properties that cannot be achieved with ferromagnets.
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Affiliation(s)
- X Marti
- 1] Department of Materials Science and Engineering and Department of Physics, University of California, Berkeley, California 94720, USA [2] Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, 12116 Praha 2, Czech Republic [3] Institute of Physics ASCR, v.v.i., Cukrovarnická 10, 162 53 Praha 6, Czech Republic
| | - I Fina
- 1] Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, Bellaterra E-08193, Spain [2] Max Planck Institute of Microstructure Physics, Weinberg 2, Halle D-06120, Germany
| | - C Frontera
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, Bellaterra E-08193, Spain
| | - Jian Liu
- Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - P Wadley
- 1] Institute of Physics ASCR, v.v.i., Cukrovarnická 10, 162 53 Praha 6, Czech Republic [2] School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, UK
| | - Q He
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - R J Paull
- Department of Materials Science and Engineering and Department of Physics, University of California, Berkeley, California 94720, USA
| | - J D Clarkson
- Department of Materials Science and Engineering and Department of Physics, University of California, Berkeley, California 94720, USA
| | - J Kudrnovský
- Institute of Physics ASCR, v.v.i., Na Slovance 2, 182 21 Praha 8, Czech Republic
| | - I Turek
- 1] Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, 12116 Praha 2, Czech Republic [2] Institute of Physics of Materials ASCR, v.v.i., Zizkova 22, Brno 616 62, Czech Republic
| | - J Kuneš
- Institute of Physics ASCR, v.v.i., Cukrovarnická 10, 162 53 Praha 6, Czech Republic
| | - D Yi
- Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - J-H Chu
- Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - C T Nelson
- National Center for Electron Microscopy, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - L You
- Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, Berkeley, California 94720, USA
| | - E Arenholz
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - S Salahuddin
- Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, Berkeley, California 94720, USA
| | - J Fontcuberta
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, Bellaterra E-08193, Spain
| | - T Jungwirth
- 1] Institute of Physics ASCR, v.v.i., Cukrovarnická 10, 162 53 Praha 6, Czech Republic [2] School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, UK
| | - R Ramesh
- 1] Department of Materials Science and Engineering and Department of Physics, University of California, Berkeley, California 94720, USA [2] Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
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Xu L, Shi Y, Gu J, Wang Y, Wang L, You L, Qi X, Ye Y, Chen Z. Association between ghrelin gene variations, body mass index, and waist-to-hip ratio in patients with polycystic ovary syndrome. Exp Clin Endocrinol Diabetes 2014; 122:144-8. [PMID: 24643690 DOI: 10.1055/s-0034-1367024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
OBJECTIVE To investigate the association between 2 single nucleotide polymorphisms (SNP501A/C and 604 G/A) in the promoter of the ghrelin gene and the hormonal and metabolic phenotypes of polycystic ovary syndrome (PCOS) in a Chinese population. MATERIALS AND METHODS 285 patients with PCOS and 260 healthy controls were selected for a prospective, case-control study at Shandong Provincial Hospital, Jinan, China. All subjects underwent genotype analysis of the 2 single nucleotide polymorphisms of the ghrelin gene. Measurements were also taken of blood lipids, glucose, and hormone levels, and calculations of body mass index (BMI) and waist-to-hip ratio (WHR) were performed to detect hormonal and metabolic phenotypes. RESULTS No significant diff erences in polymorphism genotypes were found between PCOS patients and healthy controls. However, the frequency of the -501 A/C A allele was significantly higher in the PCOS group than in the control group. PCOS -501 A/C A carriers had significantly higher BMI and WHR than PCOS women with the CC genotype. -604 G/A polymorphisms were not associated with clinical or biochemical characteristics of PCOS. CONCLUSIONS The -501 A/C polymorphism of the ghrelin gene is associated with metabolic features of PCOS in a Chinese population.
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Affiliation(s)
- L Xu
- Obstetrics and Gynecology Department, The Affiliated Hospital of Qingdao University Medical College, Qingdao, People's Republic of China
| | - Y Shi
- Shandong Provincial Key Laboratory of Reproductive Medicine, Center for Reproductive Medicine, Provincial -Hospital Affiliated to Shandong University, Jinan, People's Republic of China
| | - J Gu
- Obstetrics and Gynecology Department, The Affiliated Hospital of Qingdao University Medical College, Qingdao, People's Republic of China
| | - Y Wang
- Obstetrics and Gynecology Department, The Affiliated Hospital of Qingdao University Medical College, Qingdao, People's Republic of China
| | - L Wang
- Central Laboratory, Provincial Hospital Affiliated to Shandong University, Jinan, People's Republic of China
| | - L You
- Shandong Provincial Key Laboratory of Reproductive Medicine, Center for Reproductive Medicine, Provincial -Hospital Affiliated to Shandong University, Jinan, People's Republic of China
| | - X Qi
- Obstetrics and Gynecology Department, The Affiliated Hospital of Qingdao University Medical College, Qingdao, People's Republic of China
| | - Y Ye
- Obstetrics and Gynecology Department, The Affiliated Hospital of Qingdao University Medical College, Qingdao, People's Republic of China
| | - Z Chen
- Shandong Provincial Key Laboratory of Reproductive Medicine, Center for Reproductive Medicine, Provincial -Hospital Affiliated to Shandong University, Jinan, People's Republic of China
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Xu H, Liao J, Li Q, You L, Kang S, Chen H, He B, Tang Q. Synthesis and properties of 1-allyl-3-methyl-imidazolium bicarbonate room temperature ionic liquid. ACTA ACUST UNITED AC 2013. [DOI: 10.1179/1433075x13y.0000000174] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Affiliation(s)
- H. Xu
- Institute of Material Science and EngineeringNanchang Hangkong University, Nanchang 330063, China
| | - J. Liao
- Institute of Material Science and EngineeringNanchang Hangkong University, Nanchang 330063, China
| | - Q. Li
- Institute of Material Science and EngineeringNanchang Hangkong University, Nanchang 330063, China
| | - L. You
- HongDu Aviation Industry Group LTD Nanchang 330024, China
| | - S. Kang
- Goldpoly Science & Technology Co., Ltd, Quanzhou 362200, China
| | - H. Chen
- Institute of Materials Science and EngineeringOcean University of China, Qingdao 266100, China
| | - B. He
- Institute of Materials Science and EngineeringOcean University of China, Qingdao 266100, China
| | - Q. Tang
- Institute of Materials Science and EngineeringOcean University of China, Qingdao 266100, China
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41
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Dai MH, Liu SL, Chen NG, Zhang TP, You L, Q Zhang F, Chou TC, Szalay AA, Fong Y, Zhao YP. Oncolytic vaccinia virus in combination with radiation shows synergistic antitumor efficacy in pancreatic cancer. Cancer Lett 2013; 344:282-90. [PMID: 24321381 DOI: 10.1016/j.canlet.2013.11.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Revised: 11/06/2013] [Accepted: 11/11/2013] [Indexed: 10/25/2022]
Abstract
Combining oncolytic viruses with conventional therapy such as radiation is an innovative option for pancreatic cancer. We demonstrated that combination of GLV-1h151 and radiation yielded a synergistic cytotoxic effect, with the greatest effect achieved in the AsPC-1cell line. Combination treatment significantly increased apoptosis compared with either single treatment or the control group. In mice bearing human pancreatic tumor xenografts, combination treatment resulted in significantly enhanced inhibition of tumor growth. No evidence of toxicity was observed in mice. These results indicate that the combination of GLV-1h151 and radiation has great potential for translation into clinic practice.
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Affiliation(s)
- M H Dai
- Department of Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - S L Liu
- Department of Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - N G Chen
- Genelux Corporation, San Diego Science Center, San Diego, CA 92109, USA; Department of Radiation Medicine and Applied Sciences, Rebecca & John Moores Comprehensive Cancer Center, University of California, San Diego, CA 92093, USA
| | - T P Zhang
- Department of Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - L You
- Department of Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - F Q Zhang
- Department of Radiotherapy, Peking Union Medical College Hospital, Beijing 100730, China
| | - T C Chou
- Department of Preclinical Pharmacology, Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA
| | - A A Szalay
- Genelux Corporation, San Diego Science Center, San Diego, CA 92109, USA; Department of Radiation Medicine and Applied Sciences, Rebecca & John Moores Comprehensive Cancer Center, University of California, San Diego, CA 92093, USA; Department of Biochemistry, Rudolf Virchow Center for Experimental Biomedicine, Institute for Molecular Infection Biology, University of Wuerzburg, Wuerzburg, Germany
| | - Y Fong
- Department of Surgery, Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA.
| | - Y P Zhao
- Department of Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China.
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Wen Z, Liao Q, Hu Y, You L, Zhou L, Zhao Y. A spheroid-based 3-D culture model for pancreatic cancer drug testing, using the acid phosphatase assay. Braz J Med Biol Res 2013; 46:634-42. [PMID: 23903680 PMCID: PMC3859338 DOI: 10.1590/1414-431x20132647] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2012] [Accepted: 04/15/2013] [Indexed: 01/29/2023] Open
Abstract
Current therapy for pancreatic cancer is multimodal, involving surgery and
chemotherapy. However, development of pancreatic cancer therapies requires a
thorough evaluation of drug efficacy in vitro before animal
testing and subsequent clinical trials. Compared to two-dimensional culture of
cell monolayer, three-dimensional (3-D) models more closely mimic native
tissues, since the tumor microenvironment established in 3-D models often plays
a significant role in cancer progression and cellular responses to the drugs.
Accumulating evidence has highlighted the benefits of 3-D in
vitro models of various cancers. In the present study, we have
developed a spheroid-based, 3-D culture of pancreatic cancer cell lines
MIAPaCa-2 and PANC-1 for pancreatic drug testing, using the acid phosphatase
assay. Drug efficacy testing showed that spheroids had much higher drug
resistance than monolayers. This model, which is characteristically reproducible
and easy and offers rapid handling, is the preferred choice for filling the gap
between monolayer cell cultures and in vivo models in the
process of drug development and testing for pancreatic cancer.
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Affiliation(s)
- Z Wen
- Tsinghua University, Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
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Liu J, You L, Wang C, Liu R. Antioxidization and antiproliferation of extract from leaves of Toona sinensis. Zhong Nan Da Xue Xue Bao Yi Xue Ban 2013; 37:42-7. [PMID: 22349388 DOI: 10.3969/j.issn.1672-7347.2012.01.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
OBJECTIVE To determine the antioxidization and antiproliferation of extract from leaves of Toona sinensis (LTS). METHODS The total phenolic extract of LTS was obtained by solvent and polyamide resin to determine the content. The antioxidization of the LTS extract was measured by TOSC assay. Antiproliferation was studied in vitro with different human cancer cells. RESULTS The total phenolic content in the LTS was (427.53±4.31) mg/g and antioxidization was 807.64 μmoL vitamin C equivalents/g in the sample. The extract significantly inhibited the colon cancer cell Caco-2, human liver cancer cell HepG(2) and breast cancer cell MCF-7 proliferation with EC(50) (4.00±0.39), (153.16±13.49) and (193.46±14.68) μg/mL, respectively. The bioactivity index (BI) of the LTS extract was nearly 283. Caco-2 was more sensitive than MCF-7 and HepG(2). CONCLUSION Extract from LTS has anticancer properties useful for preventing chronic diseases.
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Affiliation(s)
- Jinfu Liu
- Department of Food Science, Tianjin Agricultural University, Tianjin, China.
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Ma CY, Ma JL, Jiao YL, Li JF, Wang LC, Yang QR, You L, Cui B, Chen ZJ, Zhao YR. The plasma level of soluble receptor for advanced glycation end products is decreased in patients with systemic lupus erythematosus. Scand J Immunol 2012; 75:614-22. [PMID: 22324318 DOI: 10.1111/j.1365-3083.2012.02691.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
In recent years, the role of high mobility group box-1 (HMGB1) protein and its receptors in autoimmune diseases has received increasing attention. It has been documented that HMGB1 is associated with disease activity in patients with systemic lupus erythematosus (SLE). This study was undertaken to determine the potential role of receptor for advanced glycation end products (RAGE), one receptor for HMGB1, in the pathogenesis of SLE. Plasma levels of soluble RAGE (sRAGE) from 105 patients with clinical diagnosis of SLE and 43 healthy controls were determined by ELISA. Associations between sRAGE levels and clinical, laboratory characteristics were assessed. The data showed that plasma levels of sRAGE in patients with SLE were significantly lower than those in healthy controls (HC) (P = 0.003). Plasma sRAGE in patients receiving short-period treatment showed an immediate decrease compared with the untreated patients (P = 0.023). In contrast, plasma sRAGE in patients receiving long-period treatment were significantly increased compared to those with short-period treatment (P = 0.000) and comparable with those in HC (P = 0.305). The significant decreased levels of sRAGE in patients with SLE suggest the potential association of RAGE signalling and SLE clinical pathology, whereas, long-period antilupus treatment may counteract the decreased sRAGE levels in patients with SLE.
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Affiliation(s)
- C-Y Ma
- Departments of Central Laboratory Pathology Rheumatology, Provincial Hospital Affiliated to Shandong University, Jinan, China
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Yu P, Luo W, Yi D, Zhang JX, Rossell MD, Yang CH, You L, Singh-Bhalla G, Yang SY, He Q, Ramasse QM, Erni R, Martin LW, Chu YH, Pantelides ST, Pennycook SJ, Ramesh R. Interface control of bulk ferroelectric polarization. Proc Natl Acad Sci U S A 2012; 109:9710-5. [PMID: 22647612 PMCID: PMC3382509 DOI: 10.1073/pnas.1117990109] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The control of material interfaces at the atomic level has led to novel interfacial properties and functionalities. In particular, the study of polar discontinuities at interfaces between complex oxides lies at the frontier of modern condensed matter research. Here we employ a combination of experimental measurements and theoretical calculations to demonstrate the control of a bulk property, namely ferroelectric polarization, of a heteroepitaxial bilayer by precise atomic-scale interface engineering. More specifically, the control is achieved by exploiting the interfacial valence mismatch to influence the electrostatic potential step across the interface, which manifests itself as the biased-voltage in ferroelectric hysteresis loops and determines the ferroelectric state. A broad study of diverse systems comprising different ferroelectrics and conducting perovskite underlayers extends the generality of this phenomenon.
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Affiliation(s)
- P Yu
- Department of Physics, University of California, Berkeley, CA 94720, USA.
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You L, Sheng ZY, Chen JY, Pan L, Chen L. The safety and efficacy of early-stage bi-weekly alendronate to improve bone mineral density and bone turnover in chinese post-menopausal women at risk of osteoporosis. J Int Med Res 2011; 39:302-10. [PMID: 21672334 DOI: 10.1177/147323001103900133] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
The efficacy and safety of early, low frequency antiresorptive drug intervention for osteopaenia on bone mineral density (BMD) and bone turnover in Chinese post-menopausal women at risk of developing osteoporosis were investigated. A total of 180 women aged 40 - 70 years were enrolled and equally randomized to receive either 70 mg alendronate once every 2 weeks plus 0.5 μg alfacalcidol daily (treatment group) or alfacalcidol 0.5 μg daily alone (control group) for 12 months. In the treatment group, lumbar spine and total hip BMD at 12 months had increased significantly from baseline and compared with the control group. There were also significant reductions in serum levels of the bone turnover biomarkers, bone-specific alkaline phosphatase and C-terminal telopeptide of type I collagen, compared with the control. No serious adverse events were observed in either group and safety profiles were similar. It was concluded that early intervention with 70 mg alendronate once every 2 weeks was safe, well tolerated and more effective than alfacalcidol alone (control) in increasing BMD and reducing bone turnover, and might prevent serious outcomes, such as fragility fractures, reduce rates of adverse effects and improve patient compliance.
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Affiliation(s)
- L You
- Department of Osteoporosis, Shanghai First People's Hospital, Shanghai Jiaotong University, 100 Haining Road, Shanghai 200080, China.
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You L, Jiefu Y. The role of the polymorphism of CYP2C9 in patients with atrial fibrillation treated in warfarin anticoagulation therapy. Heart 2011. [DOI: 10.1136/heartjnl-2011-300867.247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Zhang JX, He Q, Trassin M, Luo W, Yi D, Rossell MD, Yu P, You L, Wang CH, Kuo CY, Heron JT, Hu Z, Zeches RJ, Lin HJ, Tanaka A, Chen CT, Tjeng LH, Chu YH, Ramesh R. Microscopic origin of the giant ferroelectric polarization in tetragonal-like BiFeO(3). Phys Rev Lett 2011; 107:147602. [PMID: 22107234 DOI: 10.1103/physrevlett.107.147602] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2011] [Indexed: 05/12/2023]
Abstract
We report direct experimental evidence for a room-temperature, ∼130 μC/cm(2) ferroelectric polarization from the tetragonal-like BiFeO(3) phase. The physical origin of this remarkable enhancement of ferroelectric polarization has been investigated by a combination of x-ray absorption spectroscopy, scanning transmission electron microscopy, and first principles calculations. A large strain-induced Fe-ion displacement relative to the oxygen octahedra, combined with the contribution of Bi 6s lone pair electrons, is the mechanism driving the large ferroelectric polarization in this tetragonal-like phase.
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Affiliation(s)
- J X Zhang
- Department of Physics, University of California, Berkeley, California 94720, USA.
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Abstract
Squeezed spin states possess unique quantum correlation or entanglement and are significantly promising for advancing quantum information processing and quantum metrology. In recent back-to-back publications [C. Gross et al., Nature (London) 464, 1165 (2010) and Max F. Riedel et al., Nature (London) 464, 1170 (2010)], reduced spin fluctuations are observed leading to spin squeezing at -8.2 and -2.5 dB, respectively, in two-component atomic condensates exhibiting one-axis-twisting interactions. The noise reduction limit for the one-axis twisting scales as ∝1/N(2/3), which for a condensate with N∼10(3) atoms is about 100 times below the standard quantum limit. We present a scheme using repeated Rabi pulses capable of transforming the one-axis-twisting spin squeezing into the two-axis-twisting type, leading to Heisenberg limited noise reduction ∝1/N or an extra tenfold improvement for N∼10(3).
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Affiliation(s)
- Y C Liu
- Department of Physics, Beijing Jiaotong University, People's Republic of China
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Li F, Liu X, Zhang L, You L, Wu H, Li X, Zhao J, Yu J. QSAR studies on the depuration rates of polycyclic aromatic hydrocarbons, polybrominated diphenyl ethers and polychlorinated biphenyls in mussels (Elliptio complanata). SAR QSAR Environ Res 2011; 22:561-573. [PMID: 21732892 DOI: 10.1080/1062936x.2011.569947] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Based on the mechanism of action, a quantitative structure-activity relationship (QSAR) model for the depuration rate constants (k(d)) of 28 PAHs, 8 PBDEs and 28 PCBs in mussels (Elliptio complanata) was constructed by partial least squares (PLS) regression, following the guidelines for development and validation of QSAR models. For the training set of the QSAR model, r² = 0.953, the cross-validated regression coefficient (Q²(CUM)) was 0.947. The predicted log k(d) values for the validation set were consistent with the observed values, with a standard error (SE) of 0.160 log units and a squared correlation coefficient (Q²(EXT)) of 0.892. Comparatively, the developed QSAR model had good robustness, predictive ability and extended applicability domain. The electrophilicity index (ω), molecular polarizability (α), the averages of the negative potentials on the molecular surface (V(s⁻)) and the balance parameter of surface potential (τ) were the key parameters governing the log k(d) values in the QSAR model, which indicated that the log k(d) value was mainly related to the partition ability, electrostatic interactions, and van der Waals interactions of compounds.
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Affiliation(s)
- F Li
- Key Laboratory of Coastal Zone Environment Processes, CAS; Shandong Provincial Key Laboratory of Coastal Zone Environment Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, PR China
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