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Cassandra N Spracklen, Jinxiu Shi, Swarooparani Vadlamudi, Ying Wu, Meng Zou, Chelsea K Raulerson, James P Davis, Monica Zeynalzadeh, Kayla Jackson, Wentao Yuan, Haifeng Wang, Weihua Shou, Ying Wang, Jingchun Luo, Leslie A Lange, Ethan M Lange, Barry M Popkin, Penny Gordon-Larsen, Shufa Du, Wei Huang, Karen L Mohlke
To identify genetic contributions to type 2 diabetes (T2D) and related glycemic traits (fasting glucose, fasting insulin, and HbA1c), we conducted genome-wide association analyses (GWAS) in up to 7,178 Chinese subjects from nine provinces in the China Health and Nutrition Survey (CHNS). We examined patterns of population structure within CHNS and found that allele frequencies differed across provinces, consistent with genetic drift and population substructure. We further validated 32 previously described T2D- and glycemic trait-loci, including G6PC2 and SIX3-SIX2 associated with fasting glucose...
April 2018: PLoS Genetics
Marco Gasparetto, Vivien Wong-Spracklen, Franco Torrente, Kate Howell, Mary Brennan, Gabriele Noble-Jamieson, Robert Heuschkel, Matthias Zilbauer
The disease course of children with ulcerative colitis (UC) varies substantially. Published data on predictors of disease outcomes in children remains scarce. We validate clinical predictors of outcomes in 93 children with UC in a single centre (age range: 2-18 years, minimum follow-up: 18 months). We stratified children into 3 groups according to their disease course, i.e. 1 = mild (38/93, 40.9%), 2 = moderate (38/93, 40.9%), 3 = severe (17, 18.2%). Comparison of clinical and biochemical parameters was performed between groups using Chi-square, Mann-Whitney and log-rank tests...
February 23, 2018: Journal of Pediatric Gastroenterology and Nutrition
Luke Conibear, Edward W Butt, Christoph Knote, Stephen R Arnold, Dominick V Spracklen
Exposure to ambient fine particulate matter (PM2.5 ) is a leading contributor to diseases in India. Previous studies analysing emission source attributions were restricted by coarse model resolution and limited PM2.5 observations. We use a regional model informed by new observations to make the first high-resolution study of the sector-specific disease burden from ambient PM2.5 exposure in India. Observed annual mean PM2.5 concentrations exceed 100 μg m-3 and are well simulated by the model. We calculate that the emissions from residential energy use dominate (52%) population-weighted annual mean PM2...
February 12, 2018: Nature Communications
Michelle Kalamandeen, Emanuel Gloor, Edward Mitchard, Duncan Quincey, Guy Ziv, Dominick Spracklen, Benedict Spracklen, Marcos Adami, Luiz E O C Aragão, David Galbraith
Understanding forest loss patterns in Amazonia, the Earth's largest rainforest region, is critical for effective forest conservation and management. Following the most detailed analysis to date, spanning the entire Amazon and extending over a 14-year period (2001-2014), we reveal significant shifts in deforestation dynamics of Amazonian forests. Firstly, hotspots of Amazonian forest loss are moving away from the southern Brazilian Amazon to Peru and Bolivia. Secondly, while the number of new large forest clearings (>50 ha) has declined significantly over time (46%), the number of new small clearings (<1 ha) increased by 34% between 2001-2007 and 2008-2014...
January 25, 2018: Scientific Reports
Cassandra N Spracklen, Peng Chen, Young Jin Kim, Xu Wang, Hui Cai, Shengxu Li, Jirong Long, Ying Wu, Ya Xing Wang, Fumihiko Takeuchi
No abstract text is available yet for this article.
March 15, 2018: Human Molecular Genetics
C E Scott, S A Monks, D V Spracklen, S R Arnold, P M Forster, A Rap, M Äijälä, P Artaxo, K S Carslaw, M P Chipperfield, M Ehn, S Gilardoni, L Heikkinen, M Kulmala, T Petäjä, C L S Reddington, L V Rizzo, E Swietlicki, E Vignati, C Wilson
The climate impact of deforestation depends on the relative strength of several biogeochemical and biogeophysical effects. In addition to affecting the exchange of carbon dioxide (CO2 ) and moisture with the atmosphere and surface albedo, vegetation emits biogenic volatile organic compounds (BVOCs) that alter the formation of short-lived climate forcers (SLCFs), which include aerosol, ozone and methane. Here we show that a scenario of complete global deforestation results in a net positive radiative forcing (RF; 0...
January 11, 2018: Nature Communications
Xiangfeng Lu, Gina M Peloso, Dajiang J Liu, Ying Wu, He Zhang, Wei Zhou, Jun Li, Clara Sze-Man Tang, Rajkumar Dorajoo, Huaixing Li, Jirong Long, Xiuqing Guo, Ming Xu, Cassandra N Spracklen, Yang Chen, Xuezhen Liu, Yan Zhang, Chiea Chuen Khor, Jianjun Liu, Liang Sun, Laiyuan Wang, Yu-Tang Gao, Yao Hu, Kuai Yu, Yiqin Wang, Chloe Yu Yan Cheung, Feijie Wang, Jianfeng Huang, Qiao Fan, Qiuyin Cai, Shufeng Chen, Jinxiu Shi, Xueli Yang, Wanting Zhao, Wayne H-H Sheu, Stacey Shawn Cherny, Meian He, Alan B Feranil, Linda S Adair, Penny Gordon-Larsen, Shufa Du, Rohit Varma, Yii-Der Ida Chen, Xiao-Ou Shu, Karen Siu Ling Lam, Tien Yin Wong, Santhi K Ganesh, Zengnan Mo, Kristian Hveem, Lars G Fritsche, Jonas Bille Nielsen, Hung-Fat Tse, Yong Huo, Ching-Yu Cheng, Y Eugene Chen, Wei Zheng, E Shyong Tai, Wei Gao, Xu Lin, Wei Huang, Goncalo Abecasis, Sekar Kathiresan, Karen L Mohlke, Tangchun Wu, Pak Chung Sham, Dongfeng Gu, Cristen J Willer
Most genome-wide association studies have been of European individuals, even though most genetic variation in humans is seen only in non-European samples. To search for novel loci associated with blood lipid levels and clarify the mechanism of action at previously identified lipid loci, we used an exome array to examine protein-coding genetic variants in 47,532 East Asian individuals. We identified 255 variants at 41 loci that reached chip-wide significance, including 3 novel loci and 14 East Asian-specific coding variant associations...
December 2017: Nature Genetics
C E Scott, S A Monks, D V Spracklen, S R Arnold, P M Forster, A Rap, K S Carslaw, M P Chipperfield, C L S Reddington, C Wilson
More than one quarter of natural forests have been cleared by humans to make way for other land-uses, with changes to forest cover projected to continue. The climate impact of land-use change (LUC) is dependent upon the relative strength of several biogeophysical and biogeochemical effects. In addition to affecting the surface albedo and exchanging carbon dioxide (CO2) and moisture with the atmosphere, vegetation emits biogenic volatile organic compounds (BVOCs), altering the formation of short-lived climate forcers (SLCFs) including aerosol, ozone (O3) and methane (CH4)...
August 24, 2017: Faraday Discussions
Cassandra N Spracklen, Peng Chen, Young Jin Kim, Xu Wang, Hui Cai, Shengxu Li, Jirong Long, Ying Wu, Ya Xing Wang, Fumihiko Takeuchi, Jer-Yuarn Wu, Keum-Ji Jung, Cheng Hu, Koichi Akiyama, Yonghong Zhang, Sanghoon Moon, Todd A Johnson, Huaixing Li, Rajkumar Dorajoo, Meian He, Maren E Cannon, Tamara S Roman, Elias Salfati, Keng-Hung Lin, Xiuqing Guo, Wayne H H Sheu, Devin Absher, Linda S Adair, Themistocles L Assimes, Tin Aung, Qiuyin Cai, Li-Ching Chang, Chien-Hsiun Chen, Li-Hsin Chien, Lee-Ming Chuang, Shu-Chun Chuang, Shufa Du, Qiao Fan, Cathy S J Fann, Alan B Feranil, Yechiel Friedlander, Penny Gordon-Larsen, Dongfeng Gu, Lixuan Gui, Zhirong Guo, Chew-Kiat Heng, James Hixson, Xuhong Hou, Chao Agnes Hsiung, Yao Hu, Mi Yeong Hwang, Chii-Min Hwu, Masato Isono, Jyh-Ming Jimmy Juang, Chiea-Chuen Khor, Yun Kyoung Kim, Woon-Puay Koh, Michiaki Kubo, I-Te Lee, Sun-Ju Lee, Wen-Jane Lee, Kae-Woei Liang, Blanche Lim, Sing-Hui Lim, Jianjun Liu, Toru Nabika, Wen-Harn Pan, Hao Peng, Thomas Quertermous, Charumathi Sabanayagam, Kevin Sandow, Jinxiu Shi, Liang Sun, Pok Chien Tan, Shu-Pei Tan, Kent D Taylor, Yik-Ying Teo, Sue-Anne Toh, Tatsuhiko Tsunoda, Rob M van Dam, Aili Wang, Feijie Wang, Jie Wang, Wen Bin Wei, Yong-Bing Xiang, Jie Yao, Jian-Min Yuan, Rong Zhang, Wanting Zhao, Yii-Der Ida Chen, Stephen S Rich, Jerome I Rotter, Tzung-Dau Wang, Tangchun Wu, Xu Lin, Bok-Ghee Han, Toshihiro Tanaka, Yoon Shin Cho, Tomohiro Katsuya, Weiping Jia, Sun-Ha Jee, Yuan-Tsong Chen, Norihiro Kato, Jost B Jonas, Ching-Yu Cheng, Xiao-Ou Shu, Jiang He, Wei Zheng, Tien-Yin Wong, Wei Huang, Bong-Jo Kim, E-Shyong Tai, Karen L Mohlke, Xueling Sim
Large-scale meta-analyses of genome-wide association studies (GWAS) have identified >175 loci associated with fasting cholesterol levels, including total cholesterol (TC), high-density lipoprotein cholesterol (HDL-C), low-density lipoprotein cholesterol (LDL-C), and triglycerides (TG). With differences in linkage disequilibrium (LD) structure and allele frequencies between ancestry groups, studies in additional large samples may detect new associations. We conducted staged GWAS meta-analyses in up to 69,414 East Asian individuals from 24 studies with participants from Japan, the Philippines, Korea, China, Singapore, and Taiwan...
May 1, 2017: Human Molecular Genetics
Sebabrata Mukherjee, Alexander Spracklen, Manuel Valiente, Erika Andersson, Patrik Öhberg, Nathan Goldman, Robert R Thomson
Topological quantum matter can be realized by subjecting engineered systems to time-periodic modulations. In analogy with static systems, periodically driven quantum matter can be topologically classified by topological invariants, whose non-zero value guarantees the presence of robust edge modes. In the high-frequency limit of the drive, topology is described by standard topological invariants, such as Chern numbers. Away from this limit, these topological numbers become irrelevant, and novel topological invariants must be introduced to capture topological edge transport...
January 4, 2017: Nature Communications
P Crippa, S Castruccio, S Archer-Nicholls, G B Lebron, M Kuwata, A Thota, S Sumin, E Butt, C Wiedinmyer, D V Spracklen
Vegetation and peatland fires cause poor air quality and thousands of premature deaths across densely populated regions in Equatorial Asia. Strong El-Niño and positive Indian Ocean Dipole conditions are associated with an increase in the frequency and intensity of wildfires in Indonesia and Borneo, enhancing population exposure to hazardous concentrations of smoke and air pollutants. Here we investigate the impact on air quality and population exposure of wildfires in Equatorial Asia during Fall 2015, which were the largest over the past two decades...
November 16, 2016: Scientific Reports
M O'Sullivan, A Rap, C L Reddington, D V Spracklen, M Gloor, W Buermann
The global terrestrial carbon sink has increased since the start of this century at a time of growing carbon emissions from fossil fuel burning. Here we test the hypothesis that increases in atmospheric aerosols from fossil fuel burning enhanced the diffuse light fraction and the efficiency of plant carbon uptake. Using a combination of models, we estimate that at global scale changes in light regimes from fossil fuel aerosol emissions had only a small negative effect on the increase in terrestrial net primary production over the period 1998-2010...
August 16, 2016: Geophysical Research Letters
T F Spracklen, A A Vorster, L Ramma, S Dalvie, R S Ramesar
Ototoxicity is a disabling reaction to cisplatin chemotherapy. Much of the inter-individual variability in the development of hearing impairment among cisplatin-receiving patients has not been fully accounted for. In particular, little is known about the pharmacogenomics of cisplatin-induced ototoxicity. This study sought to investigate the role of variation in five candidate genes in a cohort of South African cancer patients. Five variants within the candidate genes were genotyped in 214 patients, of which SLC22A2 rs316019 and NFE2L2 rs6721961 associated with reduced rates of ototoxicity...
December 2017: Pharmacogenomics Journal
Cassandra N Spracklen, Kelli K Ryckman, Jennifer G Robinson, Marcia L Stefanick, Gloria E Sarto, Stephen D Anton, Robert B Wallace
Background: There is strong evidence that low and high birth weight due to in-utero programming results in elevated risk for adult diseases, though less research has been performed examining the influence of birth weight and physical disability later in life. Methods: Baseline data from 76,055 postmenopausal women in the Women's Health Initiative, a large multi-ethnic cohort, were used to examine the association between self-reported birth weight category (<6 lbs, 6-7 lbs 15 oz, 8-9 lbs 15 oz, and ≥10 lbs) and the self-reported physical functioning score on the RAND 36-item Health Survey...
April 1, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
Edward M Rogers, Andrew J Spracklen, Colleen G Bilancia, Kaelyn D Sumigray, S Colby Allred, Stephanie H Nowotarski, Kristina N Schaefer, Benjamin J Ritchie, Mark Peifer
Abelson family kinases (Abls) are key regulators of cell behavior and the cytoskeleton during development and in leukemia. Abl's SH3, SH2, and tyrosine kinase domains are joined via a linker to an F-actin-binding domain (FABD). Research on Abl's roles in cell culture led to several hypotheses for its mechanism of action: 1) Abl phosphorylates other proteins, modulating their activity, 2) Abl directly regulates the cytoskeleton via its cytoskeletal interaction domains, and/or 3) Abl is a scaffold for a signaling complex...
August 15, 2016: Molecular Biology of the Cell
Dominick V Spracklen
No abstract text is available yet for this article.
March 17, 2016: Nature
B M Donovan, C N Spracklen, M L Schweizer, K K Ryckman, A F Saftlas
BACKGROUND: Intimate partner violence (IPV) is of particular concern during pregnancy when not one, but two lives are at risk. Previous meta-analyses have suggested an association between IPV and adverse birth outcomes; however, many large studies have since been published, illustrating the need for updated pooled effect estimates. OBJECTIVES: To evaluate the relationship between IPV during pregnancy and the risk of preterm birth (PTB), low-birthweight (LBW), and small-for-gestational-age (SGA) infants...
July 2016: BJOG: An International Journal of Obstetrics and Gynaecology
Cassandra N Spracklen, Kelli K Ryckman, Elizabeth W Triche, Audrey F Saftlas
OBJECTIVE: Physical activity (PA) is hypothesized to reduce the risk of preeclampsia, but few epidemiologic studies have simultaneously evaluated leisure time PA (LTPA), sedentary activity, occupational activity, and non-occupational, non-leisure time PA. Thus, we assessed the independent and combined effects of these different types of PA during pregnancy on preeclampsia and gestational hypertension risk. METHODS: Preeclamptic (n = 258), gestational hypertensive (n = 233), and normotensive (n = 182) women identified from Iowa live birth records (2002-2005) were participants in Study of Pregnancy Hypertension in Iowa...
June 2016: Maternal and Child Health Journal
B D Spracklen, M Kalamandeen, D Galbraith, E Gloor, D V Spracklen
Protected areas (PAs) have been established to conserve tropical forests, but their effectiveness at reducing deforestation is uncertain. To explore this issue, we combined high resolution data of global forest loss over the period 2000-2012 with data on PAs. For each PA we quantified forest loss within the PA, in buffer zones 1, 5, 10 and 15 km outside the PA boundary as well as a 1 km buffer within the PA boundary. We analysed 3376 tropical and subtropical moist forest PAs in 56 countries over 4 continents...
2015: PloS One
Sebabrata Mukherjee, Alexander Spracklen, Debaditya Choudhury, Nathan Goldman, Patrik Öhberg, Erika Andersson, Robert R Thomson
We demonstrate the first experimental realization of a dispersionless state, in a photonic Lieb lattice formed by an array of optical waveguides. This engineered lattice supports three energy bands, including a perfectly flat middle band with an infinite effective mass. We analyze, both experimentally and theoretically, the evolution of well-prepared flat-band states, and show their remarkable robustness, even in the presence of disorder. The realization of flat-band states in photonic lattices opens an exciting door towards quantum simulation of flat-band models in a highly controllable environment...
June 19, 2015: Physical Review Letters
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