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Nkoy FL, Stone BL, Deering-Rice CE, Zhu A, Lamb JG, Rower JE, Reilly CA. Impact of CYP3A5 Polymorphisms on Pediatric Asthma Outcomes. Int J Mol Sci 2024; 25:6548. [PMID: 38928254 PMCID: PMC11203737 DOI: 10.3390/ijms25126548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2024] [Revised: 06/03/2024] [Accepted: 06/11/2024] [Indexed: 06/28/2024] Open
Abstract
Genetic variation among inhaled corticosteroid (ICS)-metabolizing enzymes may affect asthma control, but evidence is limited. This study tested the hypothesis that single-nucleotide polymorphisms (SNPs) in Cytochrome P450 3A5 (CYP3A5) would affect asthma outcomes. Patients aged 2-18 years with persistent asthma were recruited to use the electronic AsthmaTracker (e-AT), a self-monitoring tool that records weekly asthma control, medication use, and asthma outcomes. A subset of patients provided saliva samples for SNP analysis and participated in a pharmacokinetic study. Multivariable regression analysis adjusted for age, sex, race, and ethnicity was used to evaluate the impact of CYP3A5 SNPs on asthma outcomes, including asthma control (measured using the asthma symptom tracker, a modified version of the asthma control test or ACT), exacerbations, and hospital admissions. Plasma corticosteroid and cortisol concentrations post-ICS dosing were also assayed using liquid chromatography-tandem mass spectrometry. Of the 751 patients using the e-AT, 166 (22.1%) provided saliva samples and 16 completed the PK study. The e-AT cohort was 65.1% male, and 89.6% White, 6.0% Native Hawaiian, 1.2% Black, 1.2% Native American, 1.8% of unknown race, and 15.7% Hispanic/Latino; the median age was 8.35 (IQR: 5.51-11.3) years. CYP3A5*3/*3 frequency was 75.8% in White subjects, 50% in Native Hawaiians and 76.9% in Hispanic/Latino subjects. Compared with CYP3A5*3/*3, the CYP3A5*1/*x genotype was associated with reduced weekly asthma control (OR: 0.98; 95% CI: 0.97-0.98; p < 0.001), increased exacerbations (OR: 6.43; 95% CI: 4.56-9.07; p < 0.001), and increased asthma hospitalizations (OR: 1.66; 95% CI: 1.43-1.93; p < 0.001); analysis of 3/*3, *1/*1 and *1/*3 separately showed an allelic copy effect. Finally, PK analysis post-ICS dosing suggested muted changes in cortisol concentrations for patients with the CYP3A5*3/*3 genotype, as opposed to an effect on ICS PK. Detection of CYP3A5*3/3, CYPA35*1/*3, and CYP3A5*1/*1 could impact inhaled steroid treatment strategies for asthma in the future.
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Affiliation(s)
- Flory L. Nkoy
- Department of Pediatrics, University of Utah School of Medicine, 100 N. Mario Capecchi Drive, Salt Lake City, UT 84113, USA; (F.L.N.); (B.L.S.); (A.Z.)
| | - Bryan L. Stone
- Department of Pediatrics, University of Utah School of Medicine, 100 N. Mario Capecchi Drive, Salt Lake City, UT 84113, USA; (F.L.N.); (B.L.S.); (A.Z.)
| | - Cassandra E. Deering-Rice
- Department of Pharmacology and Toxicology, Center for Human Toxicology, University of Utah, 30 S 2000 E, Room 201 Skaggs Hall, Salt Lake City, UT 84112, USA; (C.E.D.-R.); (J.G.L.); (J.E.R.)
| | - Angela Zhu
- Department of Pediatrics, University of Utah School of Medicine, 100 N. Mario Capecchi Drive, Salt Lake City, UT 84113, USA; (F.L.N.); (B.L.S.); (A.Z.)
| | - John G. Lamb
- Department of Pharmacology and Toxicology, Center for Human Toxicology, University of Utah, 30 S 2000 E, Room 201 Skaggs Hall, Salt Lake City, UT 84112, USA; (C.E.D.-R.); (J.G.L.); (J.E.R.)
| | - Joseph E. Rower
- Department of Pharmacology and Toxicology, Center for Human Toxicology, University of Utah, 30 S 2000 E, Room 201 Skaggs Hall, Salt Lake City, UT 84112, USA; (C.E.D.-R.); (J.G.L.); (J.E.R.)
| | - Christopher A. Reilly
- Department of Pharmacology and Toxicology, Center for Human Toxicology, University of Utah, 30 S 2000 E, Room 201 Skaggs Hall, Salt Lake City, UT 84112, USA; (C.E.D.-R.); (J.G.L.); (J.E.R.)
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Jacobs SR, Ramsey N, Bagnato M, Pitt T, Davis CM. Health disparities in allergic diseases. Curr Opin Allergy Clin Immunol 2024; 24:94-101. [PMID: 38295102 PMCID: PMC10923006 DOI: 10.1097/aci.0000000000000972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2024]
Abstract
PURPOSE OF REVIEW Healthcare disparities impact prevalence, diagnosis, and management of allergic disease. The purpose of this review is to highlight the most recent evidence of healthcare disparities in allergic conditions to provide healthcare providers with better understanding of the factors contributing to disparities and to provide potential management approaches to address them. This review comes at a time in medicine where it is well documented that disparities exist, but we seek to answer the Why , How and What to do next? RECENT FINDINGS The literature highlights the socioeconomic factors at play including race/ ethnicity, neighborhood, insurance status and income. Management strategies have been implemented with the hopes of mitigating the disparate health outcomes including utilization of school-based health, distribution of educational tools and more inclusive research recruitment. SUMMARY The studies included describe the associations between upstream structural and social factors with downstream outcomes and provide ideas that can be recreated at other institutions of how to address them. Focus on research and strategies to mitigate healthcare disparities and improve diverse research participant pools are necessary to improve patient outcomes in the future.
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Affiliation(s)
- Samantha R. Jacobs
- Department of Pediatrics
- Department of Medicine
- Division of Pediatric Allergy and Immunology
- Division of Clinical Immunology, Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Nicole Ramsey
- Department of Pediatrics
- Division of Pediatric Allergy and Immunology
| | | | - Tracy Pitt
- Department of Pediatrics, Humber Hospital, Toronto, Ontario, Canada
| | - Carla M. Davis
- Department of Pediatrics, Baylor College of Medicine
- Division of Immunology, Allergy and Retrovirology, Baylor College of Medicine and Texas Children's Hospital
- Institute for Clinical and Translational Research, Baylor College of Medicine, Houston, TX, USA
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