Journal article
Inorganic nitrate supplementation enhances functional capacity and lower-limb microvascular reactivity in patients with peripheral artery disease
Nitric oxide, Vol.80, pp.45-51
11/01/2018
DOI: 10.1016/j.niox.2018.08.007
PMCID: PMC6239203
PMID: 30118808
Abstract
Peripheral artery disease (PAD) is characterized by functional and vascular impairments as well as elevated levels of inflammation which are associated with reduced nitric oxide (NO) bioavailability. Inorganic nitrate supplementation boosts NO bioavailability potentially improving functional and vasodilatory capacities and may reduce inflammation. Twenty-one patients with PAD were randomly assigned to sodium nitrate (NaNO3) or placebo supplementation groups for eight-weeks. Outcome measures included a 6-min walk test (6 MWT), blood flow and vasodilator function in the forearm and calf, as well as plasma inflammatory and adhesion biomarker concentrations. NaNO3 elevated plasma nitrate (32.3 ± 20.0 to 379.8 ± 204.6 μM) and nitrite (192.2 ± 51.8 to 353.1 ± 134.2 nM), improved 6 MWT performance (387 ± 90 to 425 ± 82 m), peak calf blood flow (BFPeak; 11.6 ± 4.9 to 14.1 ± 5.1 mL/dL tissue/min), and peak calf vascular conductance (VCPeak; 11.1 ± 4.3 to 14.2 ± 4.9 mL/dL tissue/min/mmHg) (p < 0.05 for all). Improvements in calf BFPeak (r = 0.70, p < 0.05) and VCPeak (r = 0.61, p < 0.05) correlated with changes in 6 MWT distance. Placebo supplementation did not change plasma nitrate or nitrite, 6 MWT, calf BFPeak, or calf VCPeak. Forearm vascular function nor inflammatory and adhesion biomarker concentrations changed in either group. Eight-weeks of NaNO3 supplementation improves vasodilatory capacity in the lower-limbs of patients with PAD, which correlated with improvement in functional capacity.
•Sodium nitrate increases functional capacity in patients with PAD.•Improvements in functional capacity were related to greater calf vasodilation.•Biomarkers of inflammation and adhesion were unchanged with sodium nitrate use.•No adverse events were reported with 8-weeks of sodium nitrate supplementation.
Details
- Title: Subtitle
- Inorganic nitrate supplementation enhances functional capacity and lower-limb microvascular reactivity in patients with peripheral artery disease
- Creators
- Joshua M Bock - Department of Physical Therapy and Rehabilitation Science, USADavid P Treichler - Department of Physical Therapy and Rehabilitation Science, USASamuel L Norton - Department of Physical Therapy and Rehabilitation Science, USAKenichi Ueda - Department of Anesthesia, Carver College of Medicine, University of Iowa, Iowa City, IA, USAWilliam E Hughes - Department of Physical Therapy and Rehabilitation Science, USADarren P Casey - Department of Physical Therapy and Rehabilitation Science, USA
- Resource Type
- Journal article
- Publication Details
- Nitric oxide, Vol.80, pp.45-51
- DOI
- 10.1016/j.niox.2018.08.007
- PMID
- 30118808
- PMCID
- PMC6239203
- NLM abbreviation
- Nitric Oxide
- ISSN
- 1089-8603
- eISSN
- 1089-8611
- Publisher
- Elsevier Inc
- Grant note
- DOI: 10.13039/100000968, name: American Heart Association, award: 13GRNT16490002; name: National Institutes of Health Clinical and Translational Science Award, award: U54TR001356; name: Undergraduate Summer Research Fellowship program; DOI: 10.13039/100005384, name: American Physiological Society
- Language
- English
- Date published
- 11/01/2018
- Academic Unit
- Anesthesia; Physical Therapy and Rehabilitation Science; Fraternal Order of Eagles Diabetes Research Center
- Record Identifier
- 9984047706002771
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