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1.
Environ Sci Technol ; 54(12): 7194-7204, 2020 06 16.
Artigo em Inglês | MEDLINE | ID: mdl-32476410

RESUMO

Hurricanes that damage lives and property can also impact pollutant sources and trigger poor water quality. Yet, these water quality impacts that affect both human and natural communities are difficult to quantify. We developed an operational remote sensing-based hurricane flood extent mapping method, examined potential water quality implications of two "500-year" hurricanes in 2016 and 2018, and identified options to increase social-ecological resilience in North Carolina. Flooding detected with synthetic aperture radar (>91% accuracy) extended beyond state-mapped hazard zones. Furthermore, the legal floodplain underestimated impacts for communities with higher proportions of older adults, disabilities, unemployment, and mobile homes, as well as for headwater streams with restricted elevation gradients. Pollution sources were repeatedly affected, including ∼55% of wastewater treatment plant capacity and swine operations that generate ∼500 M tons/y manure. We identified ∼4.8 million km2 for possible forest and wetland conservation and ∼1.7 million km2 for restoration or altered management opportunities. The results suggest that current hazard mapping is inadequate for resilience planning; increased storm frequency and intensity necessitate modification of design standards, land-use policies, and infrastructure operation. Implementation of interventions can be guided by a greater understanding of social-ecological vulnerabilities within hazard and exposure areas.


Assuntos
Tempestades Ciclônicas , Inundações , Idoso , Animais , Humanos , North Carolina , Rios , Suínos , Qualidade da Água
2.
Artigo em Inglês | MEDLINE | ID: mdl-31277250

RESUMO

Disparities in healthy food access are well documented in cross-sectional studies in communities across the United States. However, longitudinal studies examining changes in food environments within various neighborhood contexts are scarce. In a sample of 142 census tracts in four low-income, high-minority cities in New Jersey, United States, we examined the availability of different types of food stores by census tract characteristics over time (2009-2017). Outlets were classified as supermarkets, small grocery stores, convenience stores, and pharmacies using multiple sources of data and a rigorous protocol. Census tracts were categorized by median household income and race/ethnicity of the population each year. Significant declines were observed in convenience store prevalence in lower- and medium-income and majority black tracts (p for trend: 0.004, 0.031, and 0.006 respectively), while a slight increase was observed in the prevalence of supermarkets in medium-income tracts (p for trend: 0.059). The decline in prevalence of convenience stores in lower-income and minority neighborhoods is likely attributable to declining incomes in these already poor communities. Compared to non-Hispanic neighborhoods, Hispanic communities had a higher prevalence of small groceries and convenience stores. This higher prevalence of smaller stores, coupled with shopping practices of Hispanic consumers, suggests that efforts to upgrade smaller stores in Hispanic communities may be more sustainable.


Assuntos
Dieta Saudável/etnologia , Abastecimento de Alimentos , Grupos Minoritários , Pobreza , Características de Residência , Cidades , Comércio , Grupos de Populações Continentais , Grupos Étnicos , Humanos , Renda , Estudos Longitudinais , New Jersey
3.
Nat Commun ; 9(1): 2980, 2018 07 30.
Artigo em Inglês | MEDLINE | ID: mdl-30061623

RESUMO

Estrogen promotes growth of estrogen receptor-positive (ER+) breast tumors. However, epidemiological studies examining the prognostic characteristics of breast cancer in postmenopausal women receiving hormone replacement therapy reveal a significant decrease in tumor dissemination, suggesting that estrogen has potential protective effects against cancer cell invasion. Here, we show that estrogen suppresses invasion of ER+ breast cancer cells by increasing transcription of the Ena/VASP protein, EVL, which promotes the generation of suppressive cortical actin bundles that inhibit motility dynamics, and is crucial for the ER-mediated suppression of invasion in vitro and in vivo. Interestingly, despite its benefits in suppressing tumor growth, anti-estrogenic endocrine therapy decreases EVL expression and increases local invasion in patients. Our results highlight the dichotomous effects of estrogen on tumor progression and suggest that, in contrast to its established role in promoting growth of ER+ tumors, estrogen has a significant role in suppressing invasion through actin cytoskeletal remodeling.


Assuntos
Citoesqueleto de Actina/química , Actinas/química , Neoplasias da Mama/patologia , Receptor alfa de Estrogênio/química , Estrogênios/química , Invasividade Neoplásica , Animais , Células CACO-2 , Linhagem Celular Tumoral , Movimento Celular/efeitos dos fármacos , Proliferação de Células , Cães , Estradiol/química , Feminino , Perfilação da Expressão Gênica , Células HEK293 , Humanos , Linfonodos/patologia , Células MCF-7 , Células Madin Darby de Rim Canino , Camundongos , Camundongos Endogâmicos NOD , Metástase Neoplásica , Transcrição Genética
4.
Int J Health Geogr ; 16(1): 37, 2017 10 16.
Artigo em Inglês | MEDLINE | ID: mdl-29037243

RESUMO

BACKGROUND: Food access is a global issue, and for this reason, a wealth of studies are dedicated to understanding the location of food deserts and the benefits of urban gardens. However, few studies have linked these two strands of research together to analyze whether urban gardening activity may be a step forward in addressing issues of access for food desert residents. METHODS: The Phoenix, Arizona metropolitan area is used as a case to demonstrate the utility of spatial optimization models for siting urban gardens near food deserts and on vacant land. The locations of urban gardens are derived from a list obtained from the Maricopa County Cooperative Extension office at the University of Arizona which were geo located and aggregated to Census tracts. Census tracts were then assigned to one of three categories: tracts that contain a garden, tracts that are immediately adjacent to a tract with a garden, and all other non-garden/non-adjacent census tracts. Analysis of variance is first used to ascertain whether there are statistical differences in the demographic, socio-economic, and land use profiles of these three categories of tracts. A maximal covering spatial optimization model is then used to identify potential locations for future gardening activities. A constraint of these models is that gardens be located on vacant land, which is a growing problem in rapidly urbanizing environments worldwide. RESULTS: The spatial analysis of garden locations reveals that they are centrally located in tracts with good food access. Thus, the current distribution of gardens does not provide an alternative food source to occupants of food deserts. The maximal covering spatial optimization model reveals that gardens could be sited in alternative locations to better serve food desert residents. In fact, 53 gardens may be located to cover 96.4% of all food deserts. This is an improvement over the current distribution of gardens where 68 active garden sites provide coverage to a scant 8.4% of food desert residents. CONCLUSION: People in rapidly urbanizing environments around the globe suffer from poor food access. Rapid rates of urbanization also present an unused vacant land problem in cities around the globe. This paper highlights how spatial optimization models can be used to improve healthy food access for food desert residents, which is a critical first step in ameliorating the health problems associated with lack of healthy food access including heart disease and obesity.


Assuntos
Cidades , Meio Ambiente , Abastecimento de Alimentos/métodos , Jardinagem/métodos , Jardins , Análise Espacial , Arizona/epidemiologia , Cidades/epidemiologia , Abastecimento de Alimentos/normas , Jardinagem/normas , Jardins/normas , Humanos
5.
Drug Alcohol Depend ; 126(1-2): 55-64, 2012 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-22592141

RESUMO

BACKGROUND: Clandestine laboratory operators commonly extract ephedrine and pseudoephedrine-precursor chemicals used to synthesize methamphetamine-from over-the-counter cold/allergy/sinus products. To prevent this activity, two states, Oregon in 07/2006 and Mississippi in 07/2010, implemented regulations classifying ephedrine and pseudoephedrine as Schedule III substances, making products containing them available by prescription only. Using simple pre-regulation versus post-regulation comparisons, reports claim that the regulations have substantially reduced clandestine laboratory seizures (an indicator of laboratory prevalence) in both states, motivating efforts to implement similar regulation nationally. This study uses ARIMA-intervention time-series analysis to more rigorously evaluate the regulations' impacts on laboratory seizures. METHODS: Monthly counts of methamphetamine clandestine laboratory seizures were extracted from the Clandestine Laboratory Seizure System (2000-early 2011) for Oregon, Mississippi and selected nearby states (for quasi-control). FINDINGS: Seizures in Oregon and nearby western states largely bottomed out months before Oregon's regulation, and changed little thereafter. No significant impact for Oregon's regulation was found. Mississippi and nearby states generally had elevated seizures before Mississippi's regulation. Mississippi experienced a regulation-associated drop of 28.9 seizures (50.2%) in the series level (p<0.01), while nearby states exhibited no comparable decline. CONCLUSIONS: Oregon's regulation encountered a floor effect, making any sizable impact infeasible. Mississippi, however, realized a substantial impact, suggesting that laboratories, if sufficiently extant, can be meaningfully impacted by prescription precursor regulation. It follows that national prescription precursor regulation would have little impact in western states with low indicated laboratory prevalence, but may be of significant use in regions facing higher indicated prevalence.


Assuntos
Estimulantes do Sistema Nervoso Central , Efedrina , Drogas Ilícitas/provisão & distribução , Legislação de Medicamentos , Metanfetamina , Medicamentos sob Prescrição , Pseudoefedrina , Humanos , Mississippi/epidemiologia , Medicamentos sem Prescrição , Oregon/epidemiologia , Software , Estados Unidos/epidemiologia
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