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Levy PD, Twiner MJ, Brody AM, Dawood R, Reed B, Mango L, Gowland L, Grandits G, Svendsen K, Haacke EM, Li T, Zhang L, McNaughton CD, Flack JM. Does Vitamin D Provide Added Benefit to Antihypertensive Therapy in Reducing Left Ventricular Hypertrophy Determined by Cardiac Magnetic Resonance? Am J Hypertens 2023; 36:50-62. [PMID: 36008108 PMCID: PMC9793986 DOI: 10.1093/ajh/hpac096] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 05/02/2022] [Accepted: 08/25/2022] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Left ventricular hypertrophy (LVH) and vitamin D deficiency have been linked to hypertension (HTN) and cardiovascular disease, particularly in African Americans (AAs). Our objective was to determine if the addition of vitamin D to antihypertensive therapy would lead to greater regression of LV mass index (LVMI) as determined by cardiac magnetic resonance (CMR) after 1 year in vitamin D deficient AA patients with uncontrolled HTN and LVH. METHODS This study was a randomized, double-blind, placebo-controlled, single-center study. AA patients with HTN (systolic blood pressure [BP] >160 mm Hg), increased LVMI, and vitamin D deficiency (<20 ng/ml) were randomized. All patients received antihypertensive therapy combined with biweekly 50,000 IU vitamin D3 (vitamin D group, n = 55) or placebo (placebo group, n = 58). RESULTS At 1 year, there were no statistical differences between the vitamin D and placebo groups in LVMI (-14.1 ± 14.6 vs. -16.9 ± 13.1 g/m2; P = 0.34) or systolic BP (-25.6 ± 32.1 vs. -25.7 ± 25.6 mm Hg; P = 0.99) reduction, respectively. Serum vitamin D levels increased significantly in the vitamin D group compared with placebo (12.7 ± 2.0 vs. 1.8 ± 8.2 ng/ml; P < 0.001). CONCLUSIONS In this high-risk cohort of AAs we did not find an association between vitamin D supplementation and differential regression of LVMI or reduction in systolic BP. However, our study suffered from a small sample size with low statistical power precluding a definitive conclusion on the therapeutic benefit of vitamin D in such patients. CLINICAL TRIALS REGISTRATION Trial Number NCT01360476. Full trial protocol is available from corresponding author.
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Affiliation(s)
- Phillip D Levy
- Department of Emergency Medicine, Wayne State University, Detroit, Michigan, USA
- Emergency Medicine, Integrative Biosciences Center, Wayne State University, Detroit, Michigan, USA
| | - Michael J Twiner
- Department of Emergency Medicine, Wayne State University, Detroit, Michigan, USA
- Emergency Medicine, Integrative Biosciences Center, Wayne State University, Detroit, Michigan, USA
| | - Aaron M Brody
- Department of Emergency Medicine, Wayne State University, Detroit, Michigan, USA
- Emergency Medicine, Integrative Biosciences Center, Wayne State University, Detroit, Michigan, USA
| | - Rachelle Dawood
- Department of Emergency Medicine, Wayne State University, Detroit, Michigan, USA
- Emergency Medicine, Integrative Biosciences Center, Wayne State University, Detroit, Michigan, USA
| | - Brian Reed
- Department of Emergency Medicine, Wayne State University, Detroit, Michigan, USA
- Emergency Medicine, Integrative Biosciences Center, Wayne State University, Detroit, Michigan, USA
| | - LynnMarie Mango
- Department of Emergency Medicine, Wayne State University, Detroit, Michigan, USA
- Emergency Medicine, Integrative Biosciences Center, Wayne State University, Detroit, Michigan, USA
| | - Laura Gowland
- Department of Emergency Medicine, Wayne State University, Detroit, Michigan, USA
| | - Greg Grandits
- Division of Biostatistics, School of Public Health, University of Minnesota, Minneapolis, Minnesota, USA
| | - Kenneth Svendsen
- Division of Biostatistics, School of Public Health, University of Minnesota, Minneapolis, Minnesota, USA
| | - Ewart Mark Haacke
- Department of Radiology and College of Engineering, Wayne State University, Detroit, Michigan, USA
| | - Tao Li
- Department of Radiology, School of Medicine, University of Washington, Seattle, Washington, USA
| | - Liying Zhang
- Emergency Medicine, Integrative Biosciences Center, Wayne State University, Detroit, Michigan, USA
- Department of Family Medicine and Public Health Sciences, Wayne State University, Detroit, Michigan, USA
| | - Candace D McNaughton
- Department of Emergency Medicine, Vanderbilt University Medical Center and the Geriatric Research Education Clinical Center, Tennessee Valley Healthcare System VA Medical Center, Nashville, Tennessee, USA
| | - John M Flack
- Department of Internal Medicine, Southern Illinois University, Springfield, Illinois, USA
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Fowler PD, Nguyentran S, Quatroche L, Porter ML, Kobbekaduwa V, Tippin S, Miller G, Dinh E, Foster E, Tsao JI. Northward Expansion of Amblyomma americanum (Acari: Ixodidae) into Southwestern Michigan. J Med Entomol 2022; 59:1646-1659. [PMID: 35776508 PMCID: PMC9989843 DOI: 10.1093/jme/tjac082] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Indexed: 05/28/2023]
Abstract
Amblyomma americanum (Linnaeus) (Acari: Ixodidae) (lone star tick) is an aggressive, generalist parasite that vectors numerous important human and animal pathogens. In recent decades its geographic range has expanded northwards from endemic regions in the southeastern and southcentral United States. In 2019 five questing A. americanum ticks, comprising two life stages were detected at one site in southwestern Michigan, satisfying one CDC criterium for an established population for the first time in recent history in the state. To better characterize the extent of emerging A. americanum, we conducted active surveillance (i.e., drag sampling) in summer 2020 throughout Michigan's southern counties and detected one adult A. americanum from each of six widespread sites, including where they had been detected in 2019. A larger established population was identified at another site in Berrien County, which yielded 691 A. americanum comprising three life stages, and questing phenologies here were similar to that reported for other endemic regions. Statewide surveillance in 2021 revealed no A. americanum outside of Berrien County, but establishment criteria were met again at the two sites where established populations were first detected respectively in 2019 and 2020. These observations may represent the successful invasion of A. americanum into Michigan. Data from passive (1999-2020) and active surveillance (2004-2021) efforts, including a domestic animal sentinel program (2015-2018), are reported to provide context for this nascent invasion. Continued active surveillance is needed to help inform the public, medical professionals, and public health officials of the health risks associated with this vector.
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Affiliation(s)
| | - S Nguyentran
- Department of Fisheries & Wildlife, Michigan State University, East Lansing, MI 48824, USA
| | - L Quatroche
- Department of Fisheries & Wildlife, Michigan State University, East Lansing, MI 48824, USA
| | - M L Porter
- Comparative Medicine & Integrative Biology, Michigan State University, East Lansing, MI 48824, USA
| | - V Kobbekaduwa
- Comparative Medicine & Integrative Biology, Michigan State University, East Lansing, MI 48824, USA
| | - S Tippin
- Berrien County Health Department, Benton Harbor, MI 49023, USA
| | - Guy Miller
- Berrien County Health Department, Benton Harbor, MI 49023, USA
| | - E Dinh
- Michigan Department of Health and Human Services, Lansing, MI 48933, USA
| | - E Foster
- Current address: Division of Vector-Borne Diseases, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Fort Collins, CO 80521, USA
| | - J I Tsao
- Department of Fisheries & Wildlife, Michigan State University, East Lansing, MI 48824, USA
- Department of Large Animal Clinical Sciences, Michigan State University, East Lansing, MI 48824, USA
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