Asthma is a common and complex disorder. In the U.S., the burden of asthma is enormous, with a disproportionate impact on vulnerable groups including young children, African-Americans and those living in the inner city. These most vulnerable people often inhabit an environment that has excessive pollution levels, including high levels of indoor pollutants and allergens. Furthermore, the diet of low-income, inner city African-Americans is markedly inconsistent with national nutritional guidelines, and has a pattern that may leave them especially vulnerable to the effects of inhaled pollutants and allergens. To address the critical questions of the role of dietary intake and the indoor environment on childhood asthma, we propose a panel study of children living in urban neighborhoods enriched with African-American and lower income participants. We have already shown that in the neighborhoods of the proposed study participants that in-home pollutant levels, including particulate matter (PM) and nitrogen dioxide (NO2), greatly exceed the outdoor levels and suburban indoor levels and that these in-home pollutants are independently associated with increased asthma morbidity. Furthermore, we have already demonstrated that the diet in this high-risk population is poor and is of a pattern that is inconsistent with dietary patterns that have been shown to protect against asthma. We plan to examine the effect of the poor "inner city" diet on susceptibility of asthmatic children to in-home pollutant (PM and NO2) exposure (Aim 1), and to identify barriers and enabling factors to implementing dietary and environmental modifications in inner city homes of children with asthma (Aim 2). To address these aims will plan to recruit 200 children with asthma, ages 5-12, in inner city Baltimore, each of whom will undergo 3 seven-day monitoring periods (at baseline, 3 months and 6 months) where they will undergo indoor air monitoring, dietary and respiratory assessments, nasal lavage, exhaled nitric oxide measurements, urine collection and blood draw for markers of inflammation and oxidative stress. Importantly, the aims in this application build upon the well-established infrastructure of a group of experienced investigators with diverse but highly integrated areas of expertise. This real-world field-based study will complement the findings from Projects 2 and 3 by demonstrating the clinical effect of diet on response to indoor pollutants, and by providing corroborative evidence of the oxidative stress and inflammatory pathways by which they may act. Projects 2 and 3 will similarly examine the effects of diet on response to pollutants, but in controlled settings using human subjects and animal.

Public Health Relevance

While asthma is more common and more burdensome in inner city minority children, the reasons for this major health disparity are not completely understood. A diet that is low in fruits, vegetable and dairy, as well as high in meat, junk food and sugary drinks is suspected to increase the vulnerability of children to the effects of airborne allergens and pollutants. Our Center intends to examine the extent to which the poor quality inner city diet may leave children more vulnerable to airborne dust particles, gases and mouse allergen. We expect our findings will lead to practical recommendations to improve the inner city diet.

Agency
National Institute of Health (NIH)
Institute
National Institute of Environmental Health Sciences (NIEHS)
Type
Research Program Projects (P01)
Project #
3P01ES018176-05S1
Application #
8717842
Study Section
Special Emphasis Panel (ZES1 (P1))
Project Start
Project End
Budget Start
2013-06-01
Budget End
2013-07-31
Support Year
5
Fiscal Year
2013
Total Cost
$49,999
Indirect Cost
$19,135
Name
Johns Hopkins University
Department
Type
DUNS #
001910777
City
Baltimore
State
MD
Country
United States
Zip Code
21218
Kolahdooz, Fariba; Butler, Jennie L; Christiansen, Karina et al. (2016) Food and Nutrient Intake in African American Children and Adolescents Aged 5 to 16 Years in Baltimore City. J Am Coll Nutr 35:205-16
Lu, Kim D; Phipatanakul, Wanda; Perzanowski, Matthew S et al. (2016) Atopy, but not obesity is associated with asthma severity among children with persistent asthma. J Asthma 53:1033-44
Sudini, Kuladeep; Diette, Gregory B; Breysse, Patrick N et al. (2016) A Randomized Controlled Trial of the Effect of Broccoli Sprouts on Antioxidant Gene Expression and Airway Inflammation in Asthmatics. J Allergy Clin Immunol Pract 4:932-40
Davis, Meghan F; Peng, Roger D; McCormack, Meredith C et al. (2015) Staphylococcus aureus colonization is associated with wheeze and asthma among US children and young adults. J Allergy Clin Immunol 135:811-3.e5
Sussan, Thomas E; Gajghate, Sachin; Chatterjee, Samit et al. (2015) Nrf2 reduces allergic asthma in mice through enhanced airway epithelial cytoprotective function. Am J Physiol Lung Cell Mol Physiol 309:L27-36
Brigham, Emily P; Kolahdooz, Fariba; Hansel, Nadia et al. (2015) Association between Western diet pattern and adult asthma: a focused review. Ann Allergy Asthma Immunol 114:273-80
Brigham, Emily P; McCormack, Meredith C; Takemoto, Clifford M et al. (2015) Iron status is associated with asthma and lung function in US women. PLoS One 10:e0117545
Keet, Corinne A; McCormack, Meredith C; Pollack, Craig E et al. (2015) Neighborhood poverty, urban residence, race/ethnicity, and asthma: Rethinking the inner-city asthma epidemic. J Allergy Clin Immunol 135:655-62
McCormack, Meredith C; Belli, Andrew J; Kaji, Deepak A et al. (2015) Obesity as a susceptibility factor to indoor particulate matter health effects in COPD. Eur Respir J 45:1248-57
Peng, Roger D; Butz, Arlene M; Hackstadt, Amber J et al. (2015) Estimating the health benefit of reducing indoor air pollution in a randomized environmental intervention. J R Stat Soc Ser A Stat Soc 178:425-443

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