78 results on '"Linxin Liu"'
Search Results
2. Super-enhancer omics in stem cell
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Hongying Ma, Jian Qu, Zicheng Pang, Jian Luo, Min Yan, Weixin Xu, Haihui Zhuang, Linxin Liu, and Qiang Qu
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Super-enhancer omics ,Multi-omics ,Transcription ,Stem cell ,Cancer stem cell ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Abstract The hallmarks of stem cells, such as proliferation, self-renewal, development, differentiation, and regeneration, are critical to maintain stem cell identity which is sustained by genetic and epigenetic factors. Super-enhancers (SEs), which consist of clusters of active enhancers, play a central role in maintaining stemness hallmarks by specifically transcriptional model. The SE-navigated transcriptional complex, including SEs, non-coding RNAs, master transcriptional factors, Mediators and other co-activators, forms phase-separated condensates, which offers a toggle for directing diverse stem cell fate. With the burgeoning technologies of multiple-omics applied to examine different aspects of SE, we firstly raise the concept of “super-enhancer omics”, inextricably linking to Pan-omics. In the review, we discuss the spatiotemporal organization and concepts of SEs, and describe links between SE-navigated transcriptional complex and stem cell features, such as stem cell identity, self-renewal, pluripotency, differentiation and development. We also elucidate the mechanism of stemness and oncogenic SEs modulating cancer stem cells via genomic and epigenetic alterations hijack in cancer stem cell. Additionally, we discuss the potential of targeting components of the SE complex using small molecule compounds, genome editing, and antisense oligonucleotides to treat SE-associated organ dysfunction and diseases, including cancer. This review also provides insights into the future of stem cell research through the paradigm of SEs.
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- 2024
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3. Spatiotemporal lakes surface area changes over 35 years and potential causes in the Central Rift Valley, Ethiopia
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Tolossa Lemma Tola, Ke Zhang, Abebe D. Chukalla, Linxin Liu, Gazi Tawfiq Ezaz, Elsayed Ahmed Elsadek, and Mohammed Abdallah
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Lake surface area ,Water extraction Indices ,Landsat image ,Central Rift Valley Lakes ,Lake Abiyata ,Driving factors ,Physical geography ,GB3-5030 ,Geology ,QE1-996.5 - Abstract
Study Region: Central Rift Valley (CRV) region, Ethiopia. Study Focus: The study aims to investigate the spatiotemporal change in lake water surface extents over 35 years (1986–2020) and identify potential causes. Three alternative multispectral water indices—Normalized Difference Water Index (NDWI), Automatic Water Extraction Index (AWEI), and Modified Normalized Difference Water Index (MNDWI)—derived from Landsat sensors (TM, ETM+, OLI) were utilized to extract and analyze the lake surface area. The Mann-Kendall correlation was applied to examine whether hydro-meteorological and anthropogenic variables are possible causes for changes. New Hydrological Insights for the Region: MNDWI outperforms other indices with over 96 % accuracy in mapping lake surface area. Lake Abiyata experienced the most significant reduction in surface area from 1986 to 2020 (>50 %), followed by Lake Ziway (
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- 2024
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4. Urban health advantage and penalty in aging populations: a comparative study across major megacities in ChinaResearch in context
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Jialu Song, Linxin Liu, Hui Miao, Yanjie Xia, Dong Li, Jun Yang, Haidong Kan, Yi Zeng, and John S. Ji
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Epidemiology ,Healthy city ,China ,Air pollution ,Green space ,Commercial determinants of health ,Public aspects of medicine ,RA1-1270 - Abstract
Summary: Background: Urban living is linked to better health outcomes due to a combination of enhanced access to healthcare, transportation, and human development opportunities. However, spatial inequalities lead to disparities, resulting in urban health advantages and penalties. Understanding the relationship between health and urban development is needed to generate empirical evidence in promoting healthy aging populations. This study provides a comparative analysis using epidemiological evidence across diverse major Chinese cities, examining how their unique urban development trajectories over time have impacted the health of their aging residents. Methods: We tracked changes in air pollution (NO2, PM2.5, O3), green space (measured by NDVI), road infrastructure (ring road areas), and nighttime lighting over 20 years in six major cities in China. We followed a longitudinal cohort of 4992 elderly participants (average age 87.8 years) over 16,824 person-years. We employed Cox proportional hazard regression to assess longevity, assessing 14 variables, including age, sex, ethnicity, marital status, residence, household income, occupation, education, smoking, alcohol consumption, exercise, and points of interest (POI) count of medicine-related facilities, sports, and leisure service-related places, and scenic spots within a 5 km-radius buffer. Findings: Geographic proximity to points of interest significantly improves survival. Elderly living in proximity of the POI-rich areas had a 34.6%–35.6% lower mortality risk compared to those in POI-poor areas, for the highest compared to the lowest quartile. However, POI-rich areas had higher air pollution levels, including PM2.5 and NO2, which was associated with a 21% and 10% increase in mortality risk for increase of 10 μg/m3, respectively. The benefits of urban living had higher effect estimates in monocentric cities, with clearly defined central areas, compared to polycentric layouts, with multiple satellite city centers. Interpretation: Spatial inequalities create urban health advantages for some and penalties for others. Proximity to public facilities and economic activities is associated with health benefits, and may counterbalance the negative health impacts of lower green space and higher air pollution. Our empirical evidence show optimal health gains for age-friendly urban environments come from a balance of infrastructure, points of interest, green spaces, and low air pollution. Funding: Natural Science Foundation of Beijing (IS23105), National Natural Science Foundation of China (82250610230, 72061137004), World Health Organization (2024/1463606-0), Research Fund Vanke School of Public Health Tsinghua University (2024JC002), Beijing TaiKang YiCai Public Welfare Foundation, National Key R&D Program of China (2018YFC2000400).
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- 2024
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5. Amorphous Fe2O3 Anchored on N-Doped Graphene with Internal Micro-Channels as an Active and Durable Anode for Sodium-Ion Batteries
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Lin Li, Hui Li, Linxin Liu, Xunchang Yan, Yunze Long, and Wenpeng Han
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graphene-based macroscopic material ,functional composites ,energy storage ,Chemistry ,QD1-999 - Abstract
The reduced graphene oxide (rGO) exhibits outstanding electrical conductivity and a high specific surface area, making it a promising material for various applications. Fe2O3 is highly desirable due to its significant theoretical capacity and cost-effectiveness, high abundance, and environmental friendliness. However, the performance of these r-GO/Fe2O3 composite electrodes still needs to be further improved, especially in terms of cycle stability. The composite of Fe2O3 anchored on N-doped graphene with inside micro-channels (Fe2O3@N-GIMC) was used to be efficiently prepared. Because the inside channels can furnish extra transmission pathways and absorption websites and the interconnected structure can efficaciously forestall pulverization and aggregation of electrode materials. In addition, N doping is also beneficial to improve its electrochemical performance. Thus, it demonstrates exceptional sodium storage characteristics, including notable electrochemical activity, impressive initial Coulombic efficiency, and favorable rate performance. The optimized Fe2O3@N-GIMC indicates outstanding discharge capacity (573.5 mAh g−1 at 1 A g−1), significant rate performance (333.6 mAh g−1 at 8 A g−1), and stable long-term cycle durability (308.9 mAh g−1 after 1000 cycles at 1 A g−1, 200.8 mAh g−1 after 4000 cycles at 1 A g−1) as a sodium-ion battery anode. This presents a new approach for preparing graphene-based high-functional composites and lays a stable basis for further expanding its application field.
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- 2024
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6. Water use efficiency at multi-time scales and its response to episodic drought and wet periods in a typical subtropical evergreen forest of Southeast China
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Yunping Li, Ke Zhang, and Linxin Liu
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Water use efficiency ,Time scales ,Meteorological factor ,Episodic drought and wet period ,Gross primary production ,Evapotranspiration ,Ecology ,QH540-549.5 - Abstract
Water use efficiency (WUE) quantifies the trade-off between carbon gain and water loss. A deep understanding of its relationships with the controlling factors is essential for predicting ecosystem responses to climate change. Our study utilized the eddy covariance measurements to analyze the variability of WUE and its influencing climate factors at the seasonal, monthly, 8-day, daily, and half-hourly scales and during the episodic drought and wet periods at a typical subtropical evergreen forest of Southeast China. The results show that ET is the dominant factor influencing the WUE variability with a relative contribution of 57.56 ± 2.26% for different seasons in this study area. Secondly, WUE responds differently to climatic drivers from monthly to half-hourly scales. Our results show that WUE has a remarkably high sensitivity to soil moisture at multi-time scales (from monthly to half-hourly), and the connection strength increases with increasing time scale. Thirdly, there is no significant relationship between VPD and WUE as time scale expands. In addition, WUEs during the episodic drought period have higher values than those during the episodic wet period on the monthly scales. The half-hourly WUE during the episodic drought period is close to the WUE during the episodic wet period from 8:30 to 19:00 but is higher from 6:00 to 8:00. These results indicate that soil moisture plays an important role on influencing WUE variation at multi-time scales and under extreme climatic conditions.
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- 2023
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7. A machine learning-based dynamic ensemble selection algorithm for microwave retrieval of surface soil freeze/thaw: A case study across China
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Xi Li, Ke Zhang, Jiefan Niu, and Linxin Liu
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freeze/thaw ,dynamic ensemble selection algorithm ,china ,passive microwave remote sensing ,Mathematical geography. Cartography ,GA1-1776 ,Environmental sciences ,GE1-350 - Abstract
The surface soil freeze/thaw (FT) cycle serves as a “switch” for land surface processes; accurate retrieval of surface FT dynamics based on satellite passive microwave remote sensing is critical for studies on climate change and dynamics of the cryosphere. This study aims to improve FT retrieval accuracy by developing a new FT retrieval algorithm that applies the K-Nearest Oracle Union (KNORA-UNION) dynamic ensemble selection algorithm. This algorithm can optimally integrate three machine learning models on a grid cell scale, namely Random Forests, Extra-Trees, and Extreme Gradient Boosting. We applied our developed freeze/thaw dynamic ensemble selection retrieval algorithm (FT-DESA) to retrieve China’s daily surface FT states from 2009 to 2020 based on multiband Special Sensor Microwave Imager/Sounder (SSMIS) brightness temperatures. We then evaluated our FT-DESA results by comparing the observations of 2398 stations and three other existing FT algorithms, including the modified seasonal threshold algorithm (MSTA), decision tree algorithm (DTA), and dual-index algorithm (DIA) across China. Our results show that FT-DESA has the highest retrieval accuracy and the lowest biases across China among the four algorithms. The mean classification accuracy for the PM and AM overpasses of FT-DESA is 89% and 84%, respectively. The evaluations further indicate that some of the existing algorithms do not reflect the temporal and spatial heterogeneity in selecting thresholds for FT classification. This study demonstrates that the freeze/thaw dynamic ensemble selection algorithm can provide daily estimates of surface FT states across China, improve FT states’ retrieval accuracy, and provide a valuable multi-decadal record for daily FT states.
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- 2022
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8. NO2 and PM2.5 air pollution co-exposure and temperature effect modification on pre-mature mortality in advanced age: a longitudinal cohort study in China
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John S. Ji, Linxin Liu, Junfeng (Jim) Zhang, Haidong Kan, Bin Zhao, Katrin G. Burkart, and Yi Zeng
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NO2 ,PM2.5 ,Air Pollution ,Mortality ,Environmental Epidemiology ,China ,Industrial medicine. Industrial hygiene ,RC963-969 ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background There is a discourse on whether air pollution mixture or air pollutant components are causally linked to increased mortality. In particular, there is uncertainty on whether the association of NO2 with mortality is independent of fine particulate matter (PM2.5). Furthermore, effect modification by temperature on air pollution-related mortality also needs more evidence. Methods We used the Chinese Longitudinal Healthy Longevity Study (CLHLS), a prospective cohort with geographical and socio-economic diversity in China. The participants were enrolled in 2008 or 2009 and followed up in 2011-2012, 2014, and 2017-2018. We used remote sensing and ground monitors to measure nitrogen dioxide (NO2), fine particulate matter (PM2.5) , and temperature. We used the Cox-proportional hazards model to examine the association between component and composite air pollution and all-cause mortality, adjusted for demographic characteristics, lifestyle, geographical attributes, and temperature. We used the restricted cubic spline to visualize the concentration–response curve. Results Our study included 11 835 individuals with an average age of 86.9 (SD: 11.4) at baseline. Over 55 606 person-years of follow-up, we observed 8 216 mortality events. The average NO2 exposure was 19.1 μg/m3 (SD: 14.1); the average PM2.5 exposure was 52.8 μg/m3 (SD: 15.9). In the single pollutant models, the mortality HRs (95% CI) for 10 μg/m3 increase in annual average NO2 or PM2.5 was 1.114 (1.085, 1.143) and 1.244 (1.221, 1.268), respectively. In the multi-pollutant model co-adjusting for NO2 and PM2.5, the HR for NO2 turned insignificant: 0.978 (0.950, 1.008), but HR for PM2.5 was not altered: 1.252 (1.227, 1.279). PM2.5 and higher mortality association was robust, regardless of NO2. When acccounting for particulate matter, NO2 exposure appeared to be harmful in places of colder climates and higher seasonal temperature variation. Conclusions We see a robust relationship of PM2.5 exposure and premature mortality in advance aged individuals, however, NO2 exposure and mortality was only harmful in places of colder climate such as northeast China, indicating evidence of effect modification by temperature. Analysis of NO2 without accounting for its collinearity with PM2.5, may lead to overestimation.
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- 2022
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9. Air pollution, residential greenness, and metabolic dysfunction biomarkers: analyses in the Chinese Longitudinal Healthy Longevity Survey
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Linxin Liu, Lijing L. Yan, Yuebin Lv, Yi Zhang, Tiantian Li, Cunrui Huang, Haidong Kan, Junfeng Zhang, Yi Zeng, Xiaoming Shi, and John S. Ji
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Air pollution ,Greenness ,Interaction ,Metabolic syndrome ,Aging ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background We hypothesize higher air pollution and fewer greenness exposures jointly contribute to metabolic syndrome (MetS), as mechanisms on cardiometabolic mortality. Methods We studied the samples in the Chinese Longitudinal Healthy Longevity Survey. We included 1755 participants in 2012, among which 1073 were followed up in 2014 and 561 in 2017. We used cross-sectional analysis for baseline data and the generalized estimating equations (GEE) model in a longitudinal analysis. We examined the independent and interactive effects of fine particulate matter (PM2.5) and Normalized Difference Vegetation Index (NDVI) on MetS. Adjustment covariates included biomarker measurement year, baseline age, sex, ethnicity, education, marriage, residence, exercise, smoking, alcohol drinking, and GDP per capita. Results At baseline, the average age of participants was 85.6 (SD: 12.2; range: 65–112). Greenness was slightly higher in rural areas than urban areas (NDVI mean: 0.496 vs. 0.444; range: 0.151–0.698 vs. 0.133–0.644). Ambient air pollution was similar between rural and urban areas (PM2.5 mean: 49.0 vs. 49.1; range: 16.2–65.3 vs. 18.3–64.2). Both the cross-sectional and longitudinal analysis showed positive associations of PM2.5 with prevalent abdominal obesity (AO) and MetS, and a negative association of NDVI with prevalent AO. In the longitudinal data, the odds ratio (OR, 95% confidence interval-CI) of PM2.5 (per 10 μg/m3 increase) were 1.19 (1.12, 1.27), 1.16 (1.08, 1.24), and 1.14 (1.07, 1.21) for AO, MetS and reduced high-density lipoprotein cholesterol (HDL-C), respectively. NDVI (per 0.1 unit increase) was associated with lower AO prevalence [OR (95% CI): 0.79 (0.71, 0.88)], but not significantly associated with MetS [OR (95% CI): 0.93 (0.84, 1.04)]. PM2.5 and NDVI had a statistically significant interaction on AO prevalence (p interaction: 0.025). The association between PM2.5 and MetS, AO, elevated fasting glucose and reduced HDL-C were only significant in rural areas, not in urban areas. The association between NDVI and AO was only significant in areas with low PM2.5, not under high PM2.5. Conclusions We found air pollution and greenness had independent and interactive effect on MetS components, which may ultimately manifest in pre-mature mortality. These study findings call for green space planning in urban areas and air pollution mitigation in rural areas.
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- 2022
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10. Biophilic classroom environments on stress and cognitive performance: A randomized crossover study in virtual reality (VR)
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Jicheng You, Xinyi Wen, Linxin Liu, Jie Yin, and John S. Ji
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Medicine ,Science - Published
- 2023
11. miR-7/TGF-β2 axis sustains acidic tumor microenvironment-induced lung cancer metastasis
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Tao Su, Suchao Huang, Yanmin Zhang, Yajuan Guo, Shuwei Zhang, Jiaji Guan, Mingjing Meng, Linxin Liu, Caiyan Wang, Dihua Yu, Hiu-Yee Kwan, Zhiying Huang, Qiuju Huang, Elaine Lai-Han Leung, Ming Hu, Ying Wang, Zhongqiu Liu, and Linlin Lu
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Acidic tumor microenvironment ,miR-7-5p ,TGF-β2 ,Metastasis ,Lung cancer ,pH ,Therapeutics. Pharmacology ,RM1-950 - Abstract
Acidosis, regardless of hypoxia involvement, is recognized as a chronic and harsh tumor microenvironment (TME) that educates malignant cells to thrive and metastasize. Although overwhelming evidence supports an acidic environment as a driver or ubiquitous hallmark of cancer progression, the unrevealed core mechanisms underlying the direct effect of acidification on tumorigenesis have hindered the discovery of novel therapeutic targets and clinical therapy. Here, chemical-induced and transgenic mouse models for colon, liver and lung cancer were established, respectively. miR-7 and TGF-β2 expressions were examined in clinical tissues (n = 184). RNA-seq, miRNA-seq, proteomics, biosynthesis analyses and functional studies were performed to validate the mechanisms involved in the acidic TME-induced lung cancer metastasis. Our data show that lung cancer is sensitive to the increased acidification of TME, and acidic TME-induced lung cancer metastasis via inhibition of miR-7-5p. TGF-β2 is a direct target of miR-7-5p. The reduced expression of miR-7-5p subsequently increases the expression of TGF-β2 which enhances the metastatic potential of the lung cancer. Indeed, overexpression of miR-7-5p reduces the acidic pH-enhanced lung cancer metastasis. Furthermore, the human lung tumor samples also show a reduced miR-7-5p expression but an elevated level of activated TGF-β2; the expressions of both miR-7-5p and TGF-β2 are correlated with patients’ survival. We are the first to identify the role of the miR-7/TGF-β2 axis in acidic pH-enhanced lung cancer metastasis. Our study not only delineates how acidification directly affects tumorigenesis, but also suggests miR-7 is a novel reliable biomarker for acidic TME and a novel therapeutic target for non-small cell lung cancer (NSCLC) treatment. Our study opens an avenue to explore the pH-sensitive subcellular components as novel therapeutic targets for cancer treatment.
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- 2022
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12. Can the Integration of Rural Industries Help Strengthen China’s Agricultural Economic Resilience?
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Jie Zhou, Haipeng Chen, Qingyun Bai, Linxin Liu, Guohong Li, and Qianling Shen
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agricultural economic resilience ,rural industrial integration ,food security ,agricultural function expansion ,agricultural chain extension ,Agriculture (General) ,S1-972 - Abstract
Rural industrial integration is the key to promoting the development of rural industrial restructuring and modernization, and plays a vital role in improving agricultural economic resilience. Based on the evaluation index system of agricultural economic resilience and the level of rural industrial integration development, respectively, this paper uses panel data from 30 provincial administrative regions in China from 2000 to 2020 to empirically test the impact of rural industrial integration development on agricultural economic resilience by using an individual fixed-effects model and a mediating-effects model. The results show that rural industrial integration significantly contributes to enhancing agricultural economic resilience, and the conclusion still holds after a series of robustness tests. There is dimensional and regional heterogeneity in the impact of rural industrial integration on agricultural economic resilience, and the strength of the promotion effect by dimension is in the order of adaptive adjustment capacity, transformation and innovation capacity, and resilience to recovery capacity. In the eastern and central regions, the promotion effect of rural industrial integration on agricultural economic resilience is more significant. In the main food-producing areas, the promotion effect of rural industrial integration on resilience to recovery is significantly slighter than that of non-food-producing regions. Mechanism analysis indicates that regional industrial structure optimization is an essential channel for rural industrial integration to enhance the resilience of the agricultural economy. On this basis, in order to strengthen agricultural economic resilience, provinces should actively explore differentiated industrial integration policies to enhance industrial structure optimization and upgrading, stimulate agricultural economic vitality, and foster the development of China’s agricultural modernization.
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- 2023
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13. Obeticholic acid and 5β-cholanic acid 3 exhibit anti-tumor effects on liver cancer through CXCL16/CXCR6 pathway
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Haoxian Gou, Shenglu Liu, Linxin Liu, Ming Luo, Shu Qin, Kai He, and Xiaoli Yang
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single cell RNA sequencing ,hepatocellular carcinoma ,immunotherapy ,CXCL16 ,natural killer T cells ,bile acids ,Immunologic diseases. Allergy ,RC581-607 - Abstract
Hepatocellular carcinoma (HCC) is the most common type of liver malignancy with a high incidence and mortality rate. Previous in vitro and in vivo studies have confirmed that liver sinusoidal endothelial cells (LSEC) secrete CXCL16, which acts as a messenger to increase the hepatic accumulation of CXCR6+ natural killer T (NKT) cells and exert potent antitumor effects. However, evidence for this process in humans is lacking and its clinical significance is still unclear. In this study, by dissecting the human HCC single-cell RNA-seq data, we verified this process through cellphoneDB. NKT cells in patients with high expression of CXCL16 exhibited a higher activation state and produced more interferon-γ (IFN-γ) compared with those with low expression. We next investigated the signaling pathways between activated (CD69 high) and unactivated NKT cells (CD69 low) using NKT cell-developmental trajectories and functional enrichment analyses. In vivo experiments, we found that farnesoid X receptor agonist (obeticholic acid) combined with the takeda G protein coupled receptor 5 antagonist (5β-cholanic acid 3) exhibited significant tumor suppressive effects in the orthotopic liver tumor model and this result may be related to the CXCL16/CXCR6 axis. In conclusion, our study provides the basis and potential strategies for HCC immunotherapy based on NKT cells.
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- 2022
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14. Assessing the effects of ultraviolet radiation, residential greenness and air pollution on vitamin D levels: A longitudinal cohort study in China
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Haofan Zhang, Anna Zhu, Linxin Liu, Yi Zeng, Riyang Liu, Zongwei Ma, Miaomiao Liu, Jun Bi, and John S. Ji
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Air pollution ,Green space ,Ultraviolet radiation ,Vitamin D deficiency ,Environmental sciences ,GE1-350 - Abstract
Vitamin D metabolism is essential in aging and can be affected by multiple environmental factors. However, most studies conducted single exposure analyses. We aim to assess the individual and combined effects of ultraviolet (UV) radiation, residential greenness, fine particulate matter (PM2.5), and ozone (O3) on vitamin D levels in a national cohort study of older adults in China. We used the 2012 and 2014 Chinese Longitudinal Healthy Longevity Survey data, and measured the environmental exposure in the same year. We interpolated the UV radiation from monitoring stations, measured residential greenness through satellite-derived Normalized Difference Vegetation Index (NDVI), modeled PM2.5 with satellite data, and estimated O3 using machine learning. We dichotomized serum 25-hydroxy vitamin D (25(OH)D), the primary circulating form of vitamin D, into non-deficiency (≥50 nmol/L) and deficiency (
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- 2022
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15. Interaction of Sirtuin 1 (SIRT1) candidate longevity gene and particulate matter (PM2.5) on all-cause mortality: a longitudinal cohort study in China
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Yao Yao, Linxin Liu, Guang Guo, Yi Zeng, and John S. Ji
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Longevity gene ,Air pollution ,Sex difference ,CLHLS ,Industrial medicine. Industrial hygiene ,RC963-969 ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background The SIRT1 gene was associated with the lifespan in several organisms through inflammatory and oxidative stress pathways. Long-term air particulate matter (PM) is detrimental to health through the same pathways. Methods We used the Chinese Longitudinal Healthy Longevity Survey (CLHLS) to investigate whether there is a gene-environment (G × E) interaction of SIRT1 and air pollution on mortality in an older cohort in China. Among 7083 participants with a mean age of 81.1 years, we genotyped nine SIRT1 alleles for each participant and assessed PM2.5 concentration using 3-year average concentrations around each participant’s residence. We used Cox-proportional hazards models to estimate the independent and joint effects of SIRT1 polymorphisms and PM2.5 exposure on all-cause mortality, adjusting for a set of confounders. Results There were 2843 deaths over 42,852 person-years. The mortality hazard ratio (HR) and 95% confidence interval (CI) for each 10 μg/m3 increase in PM2·5 was 1.08 (1.05–1.11); for SIRT1_391 was 0.77 (0.61, 0.98) in the recessive model after adjustment. In stratified analyses, participants carrying two SIRT1_391 minor alleles had a significantly higher HR for each 10 μg/m3 increase in PM2.5 than those carrying zero minor alleles (1.323 (95% CI: 1.088, 1.610) vs. 1.062 (1.028, 1.096) p for interaction = 0.03). Moreover, the interaction of SIRT1 and air pollution on mortality is significant among women but not among men. We did not see significant relationships for SIRT1_366, SIRT1_773, and SIRT1_720. Conclusion We found a gene-environment interaction of SIRT1 and air pollution on mortality, future experimental studies are warranted to depict the mechanism observed in this study.
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- 2021
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16. Chronic kidney disease biomarkers and mortality among older adults: A comparison study of survey samples in China and the United States
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Hui Miao, Linxin Liu, Yeli Wang, Yucheng Wang, Qile He, Tazeen Hasan Jafar, Shenglan Tang, Yi Zeng, and John S. Ji
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Medicine ,Science - Abstract
Objectives Among older adults in China and the US, we aimed to compare the biomarkers of chronic-kidney-diseases (CKD), factors associated with CKD, and the correlation between CKD and mortality. Setting China and the US. Study design Cross-sectional and prospective cohorts. Participants We included 2019 participants aged 65 and above from the Chinese Longitudinal Healthy Longevity Study (CLHLS) in 2012, and 2177 from US National Health and Nutrition Examination Survey (NHANES) in 2011–2014. Outcomes Urinary albumin, urinary creatinine, albumin creatinine ratio (ACR), serum creatinine, blood urea nitrogen, plasma albumin, uric acid, and estimated glomerular filtration rate (eGFR). CKD (ACR ≥ 30 mg/g or eGFR< 60 ml/min/1.73m2) and mortality. Analytical approach Logistic regression and Cox proportional hazard models. Covariates included age, sex, race, education, income, marital status, health condition, smoking and drinking status, physical activity and body mass index. Results Chinese participants had lower levels of urinary albumin, ACR, and uric acid than the US (mean: 25.0 vs 76.4 mg/L, 41.7 vs 85.0 mg/g, 292.9 vs 341.3 μmol/L). In the fully-adjusted model, CKD was associated with the risk of mortality only in the US group (hazard ratio [HR], 95% CI: 2.179, 1.561–3.041 in NHANES, 1.091, 0.940–1.266 in CLHLS). Compared to eGFR≥90, eGFR ranged 30–44 ml/min/1.73m2 was only associated with mortality in the US population (HR, 95% CI: 2.249, 1.141–4.430), but not in the Chinese population (HR, 95% CI: 1.408, 0.884–2.241). Conclusions The elderly participants in the US sample had worse CKD-related biomarker levels than in China sample, and the association between CKD and mortality was also stronger among the US older adults. This may be due to the biological differences, or co-morbid conditions.
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- 2022
17. Factors associated with the inter-facility transfer of inpatients in Sichuan province, China
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Linxin Liu, Chaojie Liu, Zhanqi Duan, Jingping Pan, and Min Yang
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Inter-facility transfer ,Inpatient care ,Health policy ,Health insurance ,General hospital ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background The overuse of tertiary hospitals and underuse of primary care facilities has been one of the key reasons leading to fast health expenditure increase and health service utilization inequity in China. Recent health care reform in China tries to enforce a patient transfer system to make the health services utilization more efficient. This study examined the pattern and associated factors of inter-facility transfer of inpatients in Sichuan province of Western China. Methods Patient discharge records (n = 1,490,695) from 604 general hospitals during the period of April to June 2015 in Sichuan were extracted from the front page of the medical records system with individual information on demographics, insurance coverage, diagnoses, hospitals admitted and discharge type. We calculated the percentage of inpatients transferring to other health facilities, the Inter-Facility Transfer Rate (IFTR) with adjustment for Charlson Comorbidity Index (CCI). Multi-level logistic regression models were established to identify factors associated with IFTRs. Results A small number of tertiary hospitals (n = 75, 12.41%) shared 51.71% (n = 770,823) of all admitted cases while a large number of primary/unrated hospitals (n = 321, 53.15%) shared only 8.15%. The overall CCI-adjusted IFTR was 2.08% with 3.73% among secondary hospitals, 1.87% among tertiary hospitals and 1.30% among primary/unrated hospitals. Uninsured patients (OR = 1.13) and those with a lower level of insurance entitlements (OR = 1.12 for the New Rural Cooperative Medical Scheme and the Basic Medical Insurance for Urban Residents) were more likely to experience inter-facility transfer than those with a higher level of insurance entitlements (the Basic Medical Insurance for Urban Employees). Conclusion The level of IFTR in general hospitals in Sichuan is low, which is associated with the level of hospitals and insurance entitlements. Further studies are needed to better understand how patients and health care providers respond to different insurance policies and make decisions on inter-facility transfer.
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- 2019
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18. Residential green space structures and mortality in an elderly prospective longitudinal cohort in China
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Qile He, Linxin Liu, Hao-Ting Chang, Chih-Da Wu, and John S Ji
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greenspace structures ,vegetation index ,mortality ,cox proportional-hazards model ,environmental epidemiology ,longevity ,Environmental technology. Sanitary engineering ,TD1-1066 ,Environmental sciences ,GE1-350 ,Science ,Physics ,QC1-999 - Abstract
Greenness is beneficial to health and is associated with lower mortality. Many studies used the normalized difference vegetation index (NDVI) to measure greenness. However, NDVI cannot be used to indicate landscape type. To go beyond NDVI, we aim to study the association between greenness structures and all-cause mortality of older adults using the 2008–2014 waves of Chinese Longitudinal Healthy Longevity Survey. We calculated landscape indices to quantify three greenspace structure characteristics: area-edge, shape, and proximity. The health outcome was all-cause mortality. We used the Cox-proportional hazards model, adjusted for the study entrant year, age, sex, activities of daily living (ADL), marital status, geographic region, urban or rural residential location, literacy, annual household income, smoking, alcohol and exercise status, biodiversity, numbers of hosts for zoonosis, contemporaneous NDVI, annual average temperature, and 3 year average PM _2.5 . Among 12 999 individuals (average age at baseline 87.2 years, 5502 males), we observed 7589 deaths between 2008 and 2014. We did not find a consistent dose-response relationship between greenspace structures and all-cause mortality. However, there were some signals of associations. Compared with individuals living in the lowest quartile of the number of patches, the adjusted-hazard ratio (95% CI) of those in the highest quartile was 0.85 (0.80–0.92). In stratified analyses, the largest patch index and perimeter-area ratio had protective effects on males, individuals aged
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- 2021
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19. Comprehensive Visual Grounding for Video Description.
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Wenhui Jiang, Yibo Cheng, Linxin Liu, Yuming Fang, Yuxin Peng, and Yang Liu 0293
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- 2024
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20. The Combination of Three Natural Compounds Effectively Prevented Lung Carcinogenesis by Optimal Wound Healing.
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Linxin Liu, Hong Li, Zhenzhen Guo, Xiaofang Ma, Ning Cao, Yaqiu Zheng, Shengnan Geng, Yongjian Duan, Guang Han, and Gangjun Du
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Medicine ,Science - Abstract
The tumor stroma has been described as "normal wound healing gone awry". We explored whether the restoration of a wound healing-like microenvironment may facilitate tumor healing. Firstly, we screened three natural compounds (shikonin, notoginsenoside R1 and aconitine) from wound healing agents and evaluated the efficacies of wound healing microenvironment for limiting single agent-elicited carcinogenesis and two-stage carcinogenesis. The results showed that three compounds used alone could promote wound healing but had unfavorable efficacy to exert wound healing, and that the combination of three compounds made up treatment disadvantage of a single compound in wound healing and led to optimal wound healing. Although individual treatment with these agents may prevent cancer, they were not effective for the treatment of established tumors. However, combination treatment with these three compounds almost completely prevented urethane-induced lung carcinogenesis and reduced tumor burden. Different from previous studies, we found that urethane-induced lung carcinogenesis was associated with lung injury independent of pulmonary inflammation. LPS-induced pulmonary inflammation did not increase lung carcinogenesis, whereas decreased pulmonary inflammation by macrophage depletion promoted lung carcinogenesis. In addition, urethane damaged wound healing in skin excision wound model, reversed lung carcinogenic efficacy by the combination of three compounds was consistent with skin wound healing. Further, the combination of these three agents reduced the number of lung cancer stem cells (CSCs) by inducing cell differentiation, restoration of gap junction intercellular communication (GJIC) and blockade of the epithelial-to-mesenchymal transition (EMT). Our results suggest that restoration of a wound healing microenvironment represents an effective strategy for cancer prevention.
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- 2015
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21. An integrated flood risk assessment approach based on coupled hydrological-hydraulic modeling and bottom-up hazard vulnerability analysis.
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Ke Zhang 0004, Md Halim Shalehy, Gazi Tawfiq Ezaz, Arup Chakraborty, Kazi Mushfique Mohib, and Linxin Liu
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- 2022
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22. A Case of Insidious Onset of Kimura Disease-associated Immunoglobulin A Nephropathy without Eosinophil Infiltration in the Renal Tissue.
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Linxin Liu, Haoxian Gou, Yongfa Liu, Shuai Hu, Xiaoli Yang, and Bo Li
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- *
IGA glomerulonephritis , *EOSINOPHILS , *KIMURA disease , *GROIN , *ALLERGIES , *KIDNEY diseases , *BK virus - Abstract
Kimura disease (KD), also known as eosinophilic lymphogranuloma, is a rare chronic inflammatory or allergic disease. It can present with immune-related diseases such as nephrotic syndrome, asthma, and ankylosing spondylitis. In this study, we report a case of KD combined with immunoglobulin A nephropathy that first presented as a mass in the inguinal region, followed by recurrent renal involvement. Previous reports suggested that renal involvement caused by KD was due to direct infiltration of eosinophils; however, in this case, no eosinophil infiltration was found in the renal tissue after renal biopsy. This observation reminds us to approach the case from an immune-related molecular perspective to investigate the exact cause of renal damage due to KD. [ABSTRACT FROM AUTHOR]
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- 2023
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23. Recent variations in ecosystem water use efficiency to seasonal climate variability in China's key tropical-subtropical transitional zones
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Linxin Liu, Ke Zhang, and Giovanni Forzieri
- Abstract
Understanding how terrestrial ecosystem water use efficiency (WUE) responds to climate change is critical to accurately representing the carbon-water cycle processes. However, the dynamics of WUE under seasonal climate variations and biome-specific characteristics remain still unclear. In this study, we integrated two satellite-based retrieval algorithms to estimate gross primary productivity (GPP) and evapotranspiration (ET). Such indexes served as input to quantify ecosystem WUE (GPP/ET) and explore its dynamics during the dry and wet seasons from 2001 to 2018 in China’s key tropical to subtropical transitional zones, i.e., Yunnan Province. Results show large spatial heterogeneity and seasonal difference in WUE over the observational period. During the dry season, the increasing trends in GPP and ET have led to contrasting WUE patterns in forest and non-forest biomes, leading to positive and negative WUE trends, respectively. During the wet season, the declining trends in GPP occurring in combination with opposite trends in ET, have caused decreasing WUE consistently across all biomes except croplands, likely further modulated by human factors. The observed changes in WUE appear primarily driven by variations in air temperature (Ta) and vapor pressure deficit (VPD) during both dry and wet seasons. Overall, these results provide a valuable case for a better understanding of the carbon-water interplay in tropical-subtropical transitional zones and provide new insights to improve our capacity to predict the terrestrial ecosystem’s response to climate change.
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- 2023
24. Preparation of stretchable and porous graphene paper via functionalized with diol oligomer
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Yijun Wu, Linxin Liu, Sai Wang, Tong Zhang, Yun-Ze Long, and Wenpeng Han
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Electrical and Electronic Engineering ,Condensed Matter Physics ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials - Published
- 2023
25. Remote Sensing of Vegetation Responses to Drought Disturbances Using Spaceborne Optical and Near‐Infrared Sensors
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Ke Zhang, Linxin Liu, Yunping Li, and Ran Tao
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- 2022
26. miR-7/TGF-β2 axis sustains acidic tumor microenvironment-induced lung cancer metastasis
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Yanmin Zhang, Ming Hu, Qiuju Huang, Caiyan Wang, Elaine Lai-Han Leung, Yajuan Guo, Zhiying Huang, Dihua Yu, Zhongqiu Liu, Tao Su, Mingjing Meng, Shuwei Zhang, Ying Wang, Linlin Lu, Jiaji Guan, Linxin Liu, Suchao Huang, and Hiu Yee Kwan
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Genetically modified mouse ,0303 health sciences ,Tumor microenvironment ,business.industry ,Cancer ,medicine.disease ,medicine.disease_cause ,Metastasis ,03 medical and health sciences ,Biomarker ,0302 clinical medicine ,030220 oncology & carcinogenesis ,Cancer research ,Medicine ,General Pharmacology, Toxicology and Pharmaceutics ,business ,Lung cancer ,Carcinogenesis ,030304 developmental biology ,Transforming growth factor - Abstract
Acidosis, regardless of hypoxia involvement, is recognized as a chronic and harsh tumor microenvironment (TME) that educates malignant cells to thrive and metastasize. Although overwhelming evidence supports an acidic environment as a driver or ubiquitous hallmark of cancer progression, the unrevealed core mechanisms underlying the direct effect of acidification on tumorigenesis have hindered the discovery of novel therapeutic targets and clinical therapy. Here, chemical-induced and transgenic mouse models for colon, liver and lung cancer were established, respectively. miR-7 and TGF-β2 expressions were examined in clinical tissues (n = 184). RNA-seq, miRNA-seq, proteomics, biosynthesis analyses and functional studies were performed to validate the mechanisms involved in the acidic TME-induced lung cancer metastasis. Our data show that lung cancer is sensitive to the increased acidification of TME, and acidic TME-induced lung cancer metastasis via inhibition of miR-7-5p. TGF-β2 is a direct target of miR-7-5p. The reduced expression of miR-7-5p subsequently increases the expression of TGF-β2 which enhances the metastatic potential of the lung cancer. Indeed, overexpression of miR-7-5p reduces the acidic pH-enhanced lung cancer metastasis. Furthermore, the human lung tumor samples also show a reduced miR-7-5p expression but an elevated level of activated TGF-β2; the expressions of both miR-7-5p and TGF-β2 are correlated with patients’ survival. We are the first to identify the role of the miR-7/TGF-β2 axis in acidic pH-enhanced lung cancer metastasis. Our study not only delineates how acidification directly affects tumorigenesis, but also suggests miR-7 is a novel reliable biomarker for acidic TME and a novel therapeutic target for non-small cell lung cancer (NSCLC) treatment. Our study opens an avenue to explore the pH-sensitive subcellular components as novel therapeutic targets for cancer treatment.
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- 2022
27. Effect of FOXO3 and Air Pollution on Cognitive Function: A Longitudinal Cohort Study of Older Adults in China From 2000 to 2014
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John S Ji, Linxin Liu, Yi Zeng, and Lijing L Yan
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China ,Aging ,Forkhead Box Protein O3 ,Polymorphism, Single Nucleotide ,Cohort Studies ,Cognition ,Cross-Sectional Studies ,Air Pollution ,Humans ,Cognitive Dysfunction ,Female ,Particulate Matter ,Longitudinal Studies ,Prospective Studies ,Geriatrics and Gerontology ,Aged - Abstract
Forkhead Box O 3 (FOXO3) genotype is strongly associated with human longevity and may be protective against neurodegeneration. Air pollution is a risk factor for cognitive decline and dementia. We aimed to study the individual and combined effects of FOXO3 and air pollution on cognitive function in a large prospective cohort with up to 14 years of follow-up. We measured cognitive function and impairment using the Mini-Mental State Examination (MMSE). We used tagging SNPs rs2253310, rs2802292, and rs4946936 to identify the FOXO3 gene, of which roughly half of the population had the longevity-associated polymorphism. We matched annual average fine particulate matter (PM2.5) concentrations within a 1 km2 grid. We conducted cross-sectional and longitudinal analyses using multivariable linear and logistic regression models and generalized estimating equations. At baseline, carriers of the longevity-associated homozygous minor alleles of FOXO3 SNPs had a higher MMSE score than the carriers of homozygous major alleles. In the longitudinal follow-up, carriers of FOXO3 homozygous minor alleles had lower odds of cognitive impairment compared with noncarriers. Higher PM2.5 was associated with a lower MMSE score and higher odds of cognitive impairment. The positive effects of FOXO3 were the strongest in females, older people, and residents in areas with lower air pollution.
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- 2022
28. A D-vine copula-based quantile regression towards merging satellite precipitation products over a rugged topography at the upper Tekeze Atbara Basin of the Nile Basin.
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Abdallah, Mohammed, Ke Zhang, Lijun Chao, Omer, Abubaker, Hassaballah, Khalid, Reda, Kidane Welde, Linxin Liu, Tola, Tolossa Lemma, and Nour, Omar M.
- Abstract
Precipitation is a vital key element in various studies of hydrology, flood prediction, drought monitoring, and water resources management. The main challenge in conducting studies over remote regions with rugged topography is that weather stations are usually scarce and unevenly distributed. However, open-sourced satellite-based precipitation products SPPs) with the suitable resolution provide alternative options in these data-scarce regions, typically associated with high uncertainty. To reduce the uncertainty of individual satellite products, we have proposed a D-vine Copula-based Quantile Regression (DVQR) model to merge multiple SPPs with rain gauges (RGs). DVQR model was employed during the 2001-2017 summer monsoon seasons and compared with two other quantile regression methods based on the Multivariate Linear MLQR) and the Bayesian Model Averaging (BMAQ), respectively, and two traditional merging methods: the simple modeling average (SMA) and the one-outlier-removed average (OORA) using the descriptive and categorical statistics. The rugged topography region of the Upper Tekeze-Atbara Basin in Ethiopia was selected as the study region. The Results indicated that the precipitation data estimates with DVQR, MLQR, and BMAQ models and traditional merging methods outperformed the downscaled SPPs. Monthly evaluations reveal that all products perform better in July and September than in June and August due to precipitation variability. DVQR, MLQR, and BMAQ models exhibit higher accuracy than the traditional merging methods over UTAB. The DVQR model substantially improved all the statistical metrics considered over BMAQ and MLQR models. However, DVQR model does not outperform BMAQ and MLQR models in the probability of detection (POD) and false alarm ratio (FAR), although it has the best frequency bias index (FBI) and critical success index CSI) among all the employed models. Overall, the newly proposed merging approach improves the quality of SPPs and demonstrates the value of the proposed DVQR model in merging multiple SPPs over rugged topography regions such as UTAB. [ABSTRACT FROM AUTHOR]
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- 2023
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29. Recent Seasonal Variations in Ecosystem Water Use Efficiency in China's Key Tropical‐Subtropical Transitional Zones in Response to Climate Change
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Linxin Liu, Ke Zhang, Lijun Chao, Gazi Tawfiq Ezaz, Xi Li, and Giovanni Forzieri
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Atmospheric Science ,Global and Planetary Change ,Environmental Chemistry ,General Environmental Science - Published
- 2022
30. Multiple air pollutants co-exposure and health among the older adults in China
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John Ji, Linxin Liu, and Yi Zeng
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General Earth and Planetary Sciences ,General Environmental Science - Published
- 2022
31. A Review of the Role of Extracellular Polymeric Substances (EPS) in Wastewater Treatment Systems
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Lei Huang, Yinie Jin, Danheng Zhou, Linxin Liu, Shikun Huang, Yaqi Zhao, and Yucheng Chen
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Sewage ,Extracellular Polymeric Substance Matrix ,Polymers ,Health, Toxicology and Mutagenesis ,Public Health, Environmental and Occupational Health ,Wastewater ,Waste Disposal, Fluid ,Carbon ,Water Purification - Abstract
A review of the characterization and functions of extracellular polymeric substances (EPS) of microbial aggregates in biological wastewater treatment systems is presented in this paper. EPS represent the complex high-molecular-weight mixture of polymers excreted by microorganisms generated from cell lysis as well as adsorbed inorganic and organic matter from wastewater. EPS exhibit a three-dimensional, gel-like, highly hydrated matrix that facilitates microbial attachment, embedding, and immobilization. EPS play multiple roles in containments removal, and the main components of EPS crucially influence the properties of microbial aggregates, such as adsorption ability, stability, and formation capacity. Moreover, EPS are important to sludge bioflocculation, settleability, and dewatering properties and could be used as carbon and energy sources in wastewater treatment. However, due to the complex structure of EPS, related knowledge is incomplete, and further research is necessary to understand fully the precise roles in biological treatment processes.
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- 2022
32. Environmental greenspace, subjective well-being, and all-cause mortality in elderly Chinese: Association and mediation study in a prospective cohort
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Qile He, Linxin Liu, Haofan Zhang, Runsen Chen, Guanghui Dong, Lijing L. Yan, Yi Zeng, Yoonhee Kim, and John S. Ji
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Biochemistry ,General Environmental Science - Published
- 2023
33. Preparation of high-performance graphene materials by adjusting internal micro-channels using a combined electrospray/electrospinning technique
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Linxin Liu, Xunchang Yan, Lin Li, Jie Su, Seeram Ramakrishna, Yun-Ze Long, and Wenpeng Han
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Mechanics of Materials ,Mechanical Engineering ,Materials Chemistry ,Metals and Alloys - Published
- 2023
34. Reliable sensors based on graphene textile with negative resistance variation in three dimensions
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Wen-Peng Han, Linxin Liu, He Gong, Yi-Jun Wu, Guozhen Shen, Meng-Fei Li, Yun-Ze Long, and Yan Junxiang
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Materials science ,Textile ,Negative resistance ,Oxide ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,law.invention ,chemistry.chemical_compound ,law ,General Materials Science ,Sensitivity (control systems) ,Electrical and Electronic Engineering ,Composite material ,Electrical conductor ,Graphene ,business.industry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Durability ,Pressure sensor ,Atomic and Molecular Physics, and Optics ,0104 chemical sciences ,chemistry ,0210 nano-technology ,business - Abstract
The weft-knitted reduced graphene oxide (r-GO) textile that is made up of many conductive r-GO coated fibers was successfully prepared dependent on the electrospray deposition technique. Interestingly, the r-GO textile presents negative resistance variation not only in axial direction as the pressure increases but also in transverse direction as the lateral stretch increases which makes it has the advantage to fabricate the reliable sensors based on strain-resistance effect. The transverse-strain and pressure sensors based on the r-GO textiles all show the excellent sensing characteristics such as high sensitivity, reliability, and good durability, etc. The maximum gauge factors (GF) of the transverse-sensor are 27.1 and 153.5 in the x- and y-direction, respectively. And the practical detection range can up to 40% in the x-direction and 35% in the y-direction, respectively. The r-GO textile pressure sensor also shows high sensitivity for a broad pressure range that with a GF up to 716.8 kPa−1 for less than 4.5 kPa region and still has more sensitive pressure sensing characteristics even the pressure goes up to 14 kPa. Based on those good performances of r-GO textile sensors, its potential applications in human body states monitoring have been studied.
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- 2021
35. Gene–Environment Interaction of FOXO and Residential Greenness on Mortality Among Older Adults
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Anna Zhu, John S. Ji, Linxin Liu, Chang Shu, and Yi Zeng
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0301 basic medicine ,Aging ,chemical and pharmacologic phenomena ,hemic and immune systems ,Single-nucleotide polymorphism ,Biology ,equipment and supplies ,complex mixtures ,03 medical and health sciences ,030104 developmental biology ,0302 clinical medicine ,Environmental health ,bacteria ,Geriatrics and Gerontology ,Gene–environment interaction ,030217 neurology & neurosurgery ,Built environment - Abstract
Residential greenness is an important environmental factor that is strongly associated with mortality. To our knowledge, there was no previous study on the gene–environment interaction analysis bet...
- Published
- 2021
36. [Untitled]
- Author
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John S, Ji, Linxin, Liu, Junfeng Jim, Zhang, Haidong, Kan, Bin, Zhao, Katrin G, Burkart, and Yi, Zeng
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Aged, 80 and over ,Cohort Studies ,Air Pollutants ,China ,Air Pollution ,Nitrogen Dioxide ,Temperature ,Humans ,Particulate Matter ,Environmental Exposure ,Longitudinal Studies ,Prospective Studies ,Aged - Abstract
There is a discourse on whether air pollution mixture or air pollutant components are causally linked to increased mortality. In particular, there is uncertainty on whether the association of NOWe used the Chinese Longitudinal Healthy Longevity Study (CLHLS), a prospective cohort with geographical and socio-economic diversity in China. The participants were enrolled in 2008 or 2009 and followed up in 2011-2012, 2014, and 2017-2018. We used remote sensing and ground monitors to measure nitrogen dioxide (NOOur study included 11 835 individuals with an average age of 86.9 (SD: 11.4) at baseline. Over 55 606 person-years of follow-up, we observed 8 216 mortality events. The average NOWe see a robust relationship of PM
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- 2022
37. Sex Difference and Interaction of SIRT1 and FOXO3 Candidate Longevity Genes on Life Expectancy: A 10-Year Prospective Longitudinal Cohort Study
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John S Ji, Linxin Liu, Chang Shu, Lijing L Yan, and Yi Zeng
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Aged, 80 and over ,Male ,Aging ,THE JOURNAL OF GERONTOLOGY: Biological Sciences ,China ,Forkhead Box Protein O3 ,Life Expectancy ,Sex Factors ,Sirtuin 1 ,Humans ,Female ,Longitudinal Studies ,Prospective Studies ,Geriatrics and Gerontology - Abstract
SIRT1 and FOXO3 are both associated with longevity. Molecular biology research in many organisms (yeast, nematode worm Caenorhabditis elegans, and mice mammalian models) shows SIRT1 acts on the FOXO family of forkhead transcription factors to respond to oxidative stress better, shifting processes away from cell death toward stress resistance. Human population studies need epidemiologic evidence. We used an open cohort of 3 166 community-dwelling participants in China with follow-up from 2008 to 2018. The mean age at baseline was 84.6 years. In 16 375 person-years of follow-up, there were 1 968 mortality events. SIRT1 and FOXO3 exhibited Mendelian randomization as there was no correlation with each other and with baseline study population characteristics. Some SIRT1 and FOXO3 single-nucleotide polymorphisms showed protective effects for mortality risk. The FOXO3 protective effect was stronger in females, and the SIRT1 protective effect was stronger in male study participants. We did not see evidence of a synergistic effect of being carriers of both SIRT1 and FOXO3 advantageous alleles.
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- 2021
38. An improved process-based evapotranspiration/heat fluxes remote sensing algorithm based on the Bayesian and Sobol’ uncertainty analysis framework using eddy covariance observations of Tibetan grasslands
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Jin Feng, Ke Zhang, Lijun Chao, and Linxin Liu
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Water Science and Technology - Published
- 2022
39. Residential Green Space Structures and Mortality in an Elderly Prospective Longitudinal Cohort in China
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John S. Ji, Qile He, Chih Da Wu, Hao Ting Chang, and Linxin Liu
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Geography ,General Earth and Planetary Sciences ,Longitudinal cohort ,Space (commercial competition) ,China ,General Environmental Science ,Demography - Published
- 2021
40. The Effects of Ambient Air Pollution and Residential Greenness on Metabolic Disease Biomarkers in China
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John S. Ji, Xiaoming Shi, Linxin Liu, Yi Zeng, Yuebin Lv, and Tiantian Li
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Ambient air pollution ,Environmental health ,General Earth and Planetary Sciences ,Environmental science ,Metabolic disease ,China ,General Environmental Science - Published
- 2021
41. Comparing Effect of FOXO3 Gene and Urban-Rural Environment on Longevity: a Cohort Study among Older Adults in China
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John S. Ji, Linxin Liu, and Yi Zeng
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FOXO3 Gene ,Geography ,media_common.quotation_subject ,Longevity ,General Earth and Planetary Sciences ,China ,Rural environment ,General Environmental Science ,media_common ,Demography ,Cohort study - Published
- 2021
42. Long-term exposure to nitrogen dioxide and mortality: A prospective cohort study in urban and rural regions of China
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Linxin Liu, Katrin Burkart, John S. Ji, and Yi Zeng
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chemistry.chemical_compound ,chemistry ,business.industry ,Environmental health ,General Earth and Planetary Sciences ,Medicine ,Nitrogen dioxide ,China ,Prospective cohort study ,business ,General Environmental Science ,Term (time) - Published
- 2021
43. Effect of heatwaves and greenness on mortality among Chinese elderly people
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Linxin Liu, Miaomiao Liu, Yi Zeng, John S. Ji, Chih Da Wu, Jun Bi, and Haofan Zhang
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business.industry ,Environmental health ,General Earth and Planetary Sciences ,Elderly people ,Medicine ,business ,General Environmental Science - Published
- 2021
44. Assessing the Effect of Ultraviolet Radiation, Residential Greenness and Air Pollution on Vitamin D Levels: A Cohort Study in China
- Author
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John S. Ji, Haofan Zhang, Linxin Liu, Bi Jun, and Miaomiao Liu
- Subjects
Environmental health ,Air pollution ,medicine ,Vitamin D and neurology ,General Earth and Planetary Sciences ,Environmental science ,China ,medicine.disease_cause ,Ultraviolet radiation ,General Environmental Science ,Cohort study - Published
- 2021
45. Apolipoprotein E Induced Cognitive Dysfunction: Mediation Analysis of Lipids and Glucose Biomarkers in an Elderly Cohort Study
- Author
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Linxin Liu, Huichu Li, Hari Iyer, Andy J. Liu, Yi Zeng, and John S. Ji
- Subjects
Apolipoprotein E ,Aging ,Mediation (statistics) ,medicine.medical_specialty ,Cognitive Neuroscience ,Neurosciences. Biological psychiatry. Neuropsychiatry ,Disease ,Carbohydrate metabolism ,lipids ,Pathogenesis ,Internal medicine ,medicine ,glucose ,mediation analysis ,Prospective cohort study ,cognitive function ,Original Research ,business.industry ,Cognition ,Endocrinology ,lipids (amino acids, peptides, and proteins) ,business ,APOE ,Neuroscience ,RC321-571 ,Cohort study - Abstract
IntroductionPrior evidence suggested Apolipoprotein E (APOE), lipids, and glucose metabolism may act through the same pathways on the pathogenesis of Alzheimer’s disease (AD).MethodsThis prospective study used data from the Chinese Longitudinal Healthy Longevity Study. We tested the associations of APOE genotype (ε2ε2, ε2ε3, ε2ε4, ε3ε3, ε3ε4, and ε4ε4) and cognitive function using generalized estimating equations (GEE). We examined for possible mediation and effect modification by lipids and glucose level in this association.ResultsAPOE ε2 showed significant direct protective effect and indirect harmful effect through TC on cognitive function. Abnormal lipids or glucose levels were not consistently associated with cognitive dysfunction in our study. We did not detect significant indirect effects through lipids for APOE ε4 or any indirect effects through glucose.DiscussionThese findings suggested complicated relationships among APOE, lipids, glucose, and cognitive function. Further study can make validations in other populations.
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- 2021
46. Impact of carbon trading on agricultural green total factor productivity in China
- Author
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Daisong Yu, Linxin Liu, Shanhong Gao, Shiyu Yuan, Qianling Shen, and Haipeng Chen
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Renewable Energy, Sustainability and the Environment ,Strategy and Management ,Building and Construction ,Industrial and Manufacturing Engineering ,General Environmental Science - Published
- 2022
47. Air pollution, residential greenness, and metabolic dysfunction biomarkers: analyses in the Chinese Longitudinal Healthy Longevity Survey
- Author
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Linxin Liu, Lijing L. Yan, Yuebin Lv, Yi Zhang, Tiantian Li, Cunrui Huang, Haidong Kan, Junfeng Zhang, Yi Zeng, Xiaoming Shi, and John S. Ji
- Subjects
Metabolic Syndrome ,Air Pollutants ,China ,Cross-Sectional Studies ,Air Pollution ,Public Health, Environmental and Occupational Health ,Humans ,Particulate Matter ,Environmental Exposure ,Biomarkers - Abstract
Background We hypothesize higher air pollution and fewer greenness exposures jointly contribute to metabolic syndrome (MetS), as mechanisms on cardiometabolic mortality. Methods We studied the samples in the Chinese Longitudinal Healthy Longevity Survey. We included 1755 participants in 2012, among which 1073 were followed up in 2014 and 561 in 2017. We used cross-sectional analysis for baseline data and the generalized estimating equations (GEE) model in a longitudinal analysis. We examined the independent and interactive effects of fine particulate matter (PM2.5) and Normalized Difference Vegetation Index (NDVI) on MetS. Adjustment covariates included biomarker measurement year, baseline age, sex, ethnicity, education, marriage, residence, exercise, smoking, alcohol drinking, and GDP per capita. Results At baseline, the average age of participants was 85.6 (SD: 12.2; range: 65–112). Greenness was slightly higher in rural areas than urban areas (NDVI mean: 0.496 vs. 0.444; range: 0.151–0.698 vs. 0.133–0.644). Ambient air pollution was similar between rural and urban areas (PM2.5 mean: 49.0 vs. 49.1; range: 16.2–65.3 vs. 18.3–64.2). Both the cross-sectional and longitudinal analysis showed positive associations of PM2.5 with prevalent abdominal obesity (AO) and MetS, and a negative association of NDVI with prevalent AO. In the longitudinal data, the odds ratio (OR, 95% confidence interval-CI) of PM2.5 (per 10 μg/m3 increase) were 1.19 (1.12, 1.27), 1.16 (1.08, 1.24), and 1.14 (1.07, 1.21) for AO, MetS and reduced high-density lipoprotein cholesterol (HDL-C), respectively. NDVI (per 0.1 unit increase) was associated with lower AO prevalence [OR (95% CI): 0.79 (0.71, 0.88)], but not significantly associated with MetS [OR (95% CI): 0.93 (0.84, 1.04)]. PM2.5 and NDVI had a statistically significant interaction on AO prevalence (pinteraction: 0.025). The association between PM2.5 and MetS, AO, elevated fasting glucose and reduced HDL-C were only significant in rural areas, not in urban areas. The association between NDVI and AO was only significant in areas with low PM2.5, not under high PM2.5. Conclusions We found air pollution and greenness had independent and interactive effect on MetS components, which may ultimately manifest in pre-mature mortality. These study findings call for green space planning in urban areas and air pollution mitigation in rural areas.
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- 2021
48. Comparing Effects of FOXO3 and Residing in Urban Areas on Longevity: A Gene-Environment Interaction Study
- Author
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John S Ji, Linxin Liu, Lijing L Yan, and Yi Zeng
- Subjects
Rural Population ,Aging ,THE JOURNAL OF GERONTOLOGY: Biological Sciences ,Urban Population ,Parks, Recreational ,Forkhead Box Protein O3 ,Longevity ,Neighborhood Characteristics ,Polymorphism, Single Nucleotide ,Air Pollution ,Humans ,Gene-Environment Interaction ,Particulate Matter ,Geriatrics and Gerontology ,Aged - Abstract
Forkhead box O3 (FOXO3) is a candidate longevity gene. Urban residents are also positively associated with longer life expectancy. We conducted a gene–environment interaction to assess the synergistic effect of FOXO3 and urban/rural environments on mortality. We included 3 085 older adults from the Chinese Longitudinal Healthy Longevity Survey. We used single-nucleotide polymorphisms (SNPs) rs2253310, rs2802292, and rs4946936 to identify the FOXO3 gene and classified residential locations as “urban” and “rural.” Given the open cohort design, we used the Cox-proportional hazard regression models to assess the mortality risk. We found the minor allele homozygotes of FOXO3 to have a protective effect on mortality (HR [95% CI] for rs4946936 TT vs CC: 0.807 [0.653–0.996]; rs2802292 GG vs TT: 0.812 [0.67–0.985]; rs2253310 CC vs GG: 0.808 [0.667–0.978]). Participants living in urban areas had a lower risk of mortality (HR of the urban vs the rural: 0.854 [0.759–0.962]). The interaction between FOXO3 and urban and rural regions was statistically significant (pinteraction < .01). Higher air pollution (fine particulate matter: PM2.5) and lower residential greenness (Normalized Difference Vegetation Index [NDVI]) both contributed to higher mortality. After adjusting for NDVI and PM2.5, the protective effect size of FOXO3 SNPs was slightly attenuated while the protective effect size of living in an urban environment increased. The effect size of the beneficial effect of FOXO3 on mortality is roughly equivalent to that of living in urban areas. Our research findings indicate that the effect of places of residence and genetic predisposition of longevity are intertwined.
- Published
- 2021
49. miR-7/TGF
- Author
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Tao, Su, Suchao, Huang, Yanmin, Zhang, Yajuan, Guo, Shuwei, Zhang, Jiaji, Guan, Mingjing, Meng, Linxin, Liu, Caiyan, Wang, Dihua, Yu, Hiu-Yee, Kwan, Zhiying, Huang, Qiuju, Huang, Elaine, Lai-Han Leung, Ming, Hu, Ying, Wang, Zhongqiu, Liu, and Linlin, Lu
- Abstract
Acidosis, regardless of hypoxia involvement, is recognized as a chronic and harsh tumor microenvironment (TME) that educates malignant cells to thrive and metastasize. Although overwhelming evidence supports an acidic environment as a driver or ubiquitous hallmark of cancer progression, the unrevealed core mechanisms underlying the direct effect of acidification on tumorigenesis have hindered the discovery of novel therapeutic targets and clinical therapy. Here, chemical-induced and transgenic mouse models for colon, liver and lung cancer were established, respectively. miR-7 and TGF
- Published
- 2021
50. Effect of heatwaves and greenness on mortality among Chinese older adults
- Author
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Miaomiao Liu, Jun Bi, John S. Ji, Haofan Zhang, Yi Zeng, and Linxin Liu
- Subjects
Percentile ,China ,Proportional hazards model ,business.industry ,Health, Toxicology and Mutagenesis ,Parks, Recreational ,Hazard ratio ,General Medicine ,Toxicology ,Pollution ,Normalized Difference Vegetation Index ,Daily maximum temperature ,Medicine ,Humans ,Longitudinal Studies ,Prospective Studies ,Mortality ,Prospective cohort study ,business ,Extreme Hot Weather ,Healthy longevity ,Demography ,Environmental epidemiology ,Aged - Abstract
Heatwaves and greenness have been shown to affect health, but the evidence on their joint effects is limited. We aim to assess the associations of the combined exposure to greenness and heatwaves. We utilized five waves (February 2000-October 2014) of the Chinese Longitudinal Healthy Longevity Survey (CLHLS), a prospective cohort of older adults aged 65. We defined heatwaves as the daily maximum temperature ≥92.5th percentile with duration ≥3 days. We calculated the number of heatwave days in one year before death to and cumulative Normalized Difference Vegetation Index (NDVI) during follow-up to assess individual long-term exposure to heatwaves and greenness. Cox proportional hazards models were used to assess the effects of greenness, heatwaves, and their interaction on mortality, adjusted for covariates. We conducted subgroup analyses by residence, gender, and age. There were 20,758 participants in our study, totaling 67,312 person-years of follow-up. The mean NDVI was 0·41 (SD 0.13), and the mean number of heatwave days was 8.92 (2.04). In the adjusted model, the mortality hazard ratio (HR) for each 3-day increase in heatwave days was 1.04 (95% CI 1.04, 1.05), each 0.1-unit decrease in cumulative NDVI was 1.06 (1.05, 1.07). In the adjusted model with an interaction term, the HR for the interaction term was 1.01 (1.01, 1.02) with a p-value less than 0.001. In our subgroup analyses, the HR for each 3-day increase in heatwave days was higher in urban areas than in rural areas (1.06 vs. 1.03), and the HR for 0.1-unit decrease in NDVI was higher in urban areas than in rural areas (1.08 vs. 1.04). Greenness can protect against the effect of heatwaves on mortality, and heatwaves affect the health effects of greenness. Urban dwellers have a higher response to the detrimental effect of heatwaves and a higher marginal benefit from greenness exposure.
- Published
- 2021
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