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A Nutraceutical Timing Hypothesis: Does Supplementation with Nitrate-Rich Beetroot Juice Provide Vascular Protection Across Postmenopausal Stages?
A Nutraceutical Timing Hypothesis: Does Supplementation with Nitrate-Rich Beetroot Juice Provide Vascular Protection Across Postmenopausal Stages?
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211152111
- ISBN
- 9798384231288
- DDC
- 500
- 서명/저자
- A Nutraceutical Timing Hypothesis: Does Supplementation with Nitrate-Rich Beetroot Juice Provide Vascular Protection Across Postmenopausal Stages?
- 발행사항
- [Sl] : The Pennsylvania State University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 169 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-03, Section: A.
- 주기사항
- Advisor: Proctor, David.
- 학위논문주기
- Thesis (Ph.D.)--The Pennsylvania State University, 2024.
- 초록/해제
- 요약Differentiating the adverse chronological- and reproductive-aging associated changes on the vasculature remains a challenge to investigate. This is particularly important for women as the onset of menopause coincides with unfavorable changes to cardiovascular disease (CVD) risk factors. The permanent loss of estrogen following menopause is associated with reductions in nitric oxide bioavailability (NO), an important vasodilator and signaling molecule, which can lead to impaired endothelium-dependent vasodilation. Endothelial dysfunction, a prognostic indicator of CVD risk, rapidly declines across the menopause transition, independent of chronological age. To further understand the effects of reproductive aging on the vasculature, the first study of this dissertation compared the extent of vascular dysfunction from pneumatic cuff-induced whole arm endothelial ischemia-reperfusion (IR) injury in estrogen-replete premenopausal (n=11) and estrogen-deficient postmenopausal women staged into early- (1-6 years following menopause, n=11) and late- (6+ years following menopause, n=11) postmenopause. In this cross-sectional study, we found that despite comparable baseline endothelial function to premenopausal women, early postmenopausal women demonstrate an exaggerated IR-induced impairment in endothelial function.Few low risk-estrogen therapies exist for enhancing vascular health, and traditional pharmacological management of CVD risk factors are less effective in older women. Consequently, there is a clinical demand to investigate innovative non-pharmacological interventions, specifically nutraceuticals, focusing on dietary strategies that can enhance NO bioavailability in postmenopausal women. The subsequent study comprising this dissertation tested the ability of both acute (600 mg nitrate per 140 mL x one dose) and 7-day (300 mg nitrate per 70mL daily x 7 days) nitrate-rich beetroot juice supplementation to raise circulating concentrations of nitrite and favorably influence resting endothelial function, endothelial protection (i.e., endothelial resistance) against IR injury, and plasma oxidative stress (chapter 5) in normotensive, metabolically healthy early- (n=12) and late- (n=12) postmenopausal women. A randomized, placebo-controlled (BRnitrate vs. BRplacebo; IND#119978), double blind, crossover study design was used, with a minimum 14-day washout period between treatments and standardized pre-visit instructions to minimize between-visit variation in plasma nitrite concentration. Compared to responses observed with BRplacebo, our findings demonstrate: 1) acute BRnitrate consumption raised plasma nitrite concentration and improved endothelial resistance against IR injury, regardless of postmenopausal stage, 2) despite a clinically significant increase in resting endothelial function, nitrate-mediated endothelial protection against IR injury was not maintained 24-hours following the last dose of 7-day supplementation with BRnitrate in either postmenopausal group and 3) while 7-day BRnitrate did not affect the plasma metabolome, we show that reproductive aging critically impacts the plasma metabolite profile between postmenopausal stages. Collectively, these results provide the first evidence that acute dietary nitrate supplementation enhances endothelial protection against IR injury, regardless of postmenopausal stage. Moreover, our findings highlight that chronobiological variations in nitrate metabolism and the timing of BRnitrate supplementation in relation to the IR injury protocol, may have confounded the observed results following 7-day BRnitratesupplementation. These studies also raise a new series of questions related to the mechanisms by which dietary nitrate may benefit postmenopausal cardiovascular health and support the pursuit of larger scale trials of dietary nitrate supplementation to determine whether these effects are in fact clinically significant and sustainable.
- 일반주제명
- Plasma
- 일반주제명
- Womens health
- 일반주제명
- Mortality
- 일반주제명
- Risk factors
- 일반주제명
- Antioxidants
- 일반주제명
- Atherosclerosis
- 일반주제명
- Drug dosages
- 일반주제명
- Oxidative stress
- 일반주제명
- Medicine
- 일반주제명
- Middle age
- 일반주제명
- Blood pressure
- 일반주제명
- Aging
- 일반주제명
- Hypertension
- 일반주제명
- Cardiovascular disease
- 일반주제명
- Heart
- 일반주제명
- Ischemia
- 일반주제명
- Metabolites
- 일반주제명
- Angina pectoris
- 일반주제명
- Endocrinology
- 일반주제명
- Food science
- 일반주제명
- Pharmaceutical sciences
- 일반주제명
- Public health
- 일반주제명
- Therapy
- 기본자료저록
- Dissertations Abstracts International. 86-03A.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■1001 ▼aDelgado, Jocelyn.
■24512▼aA Nutraceutical Timing Hypothesis: Does Supplementation with Nitrate-Rich Beetroot Juice Provide Vascular Protection Across Postmenopausal Stages?
■260 ▼a[Sl]▼bThe Pennsylvania State University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a169 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-03, Section: A.
■500 ▼aAdvisor: Proctor, David.
■5021 ▼aThesis (Ph.D.)--The Pennsylvania State University, 2024.
■520 ▼aDifferentiating the adverse chronological- and reproductive-aging associated changes on the vasculature remains a challenge to investigate. This is particularly important for women as the onset of menopause coincides with unfavorable changes to cardiovascular disease (CVD) risk factors. The permanent loss of estrogen following menopause is associated with reductions in nitric oxide bioavailability (NO), an important vasodilator and signaling molecule, which can lead to impaired endothelium-dependent vasodilation. Endothelial dysfunction, a prognostic indicator of CVD risk, rapidly declines across the menopause transition, independent of chronological age. To further understand the effects of reproductive aging on the vasculature, the first study of this dissertation compared the extent of vascular dysfunction from pneumatic cuff-induced whole arm endothelial ischemia-reperfusion (IR) injury in estrogen-replete premenopausal (n=11) and estrogen-deficient postmenopausal women staged into early- (1-6 years following menopause, n=11) and late- (6+ years following menopause, n=11) postmenopause. In this cross-sectional study, we found that despite comparable baseline endothelial function to premenopausal women, early postmenopausal women demonstrate an exaggerated IR-induced impairment in endothelial function.Few low risk-estrogen therapies exist for enhancing vascular health, and traditional pharmacological management of CVD risk factors are less effective in older women. Consequently, there is a clinical demand to investigate innovative non-pharmacological interventions, specifically nutraceuticals, focusing on dietary strategies that can enhance NO bioavailability in postmenopausal women. The subsequent study comprising this dissertation tested the ability of both acute (600 mg nitrate per 140 mL x one dose) and 7-day (300 mg nitrate per 70mL daily x 7 days) nitrate-rich beetroot juice supplementation to raise circulating concentrations of nitrite and favorably influence resting endothelial function, endothelial protection (i.e., endothelial resistance) against IR injury, and plasma oxidative stress (chapter 5) in normotensive, metabolically healthy early- (n=12) and late- (n=12) postmenopausal women. A randomized, placebo-controlled (BRnitrate vs. BRplacebo; IND#119978), double blind, crossover study design was used, with a minimum 14-day washout period between treatments and standardized pre-visit instructions to minimize between-visit variation in plasma nitrite concentration. Compared to responses observed with BRplacebo, our findings demonstrate: 1) acute BRnitrate consumption raised plasma nitrite concentration and improved endothelial resistance against IR injury, regardless of postmenopausal stage, 2) despite a clinically significant increase in resting endothelial function, nitrate-mediated endothelial protection against IR injury was not maintained 24-hours following the last dose of 7-day supplementation with BRnitrate in either postmenopausal group and 3) while 7-day BRnitrate did not affect the plasma metabolome, we show that reproductive aging critically impacts the plasma metabolite profile between postmenopausal stages. Collectively, these results provide the first evidence that acute dietary nitrate supplementation enhances endothelial protection against IR injury, regardless of postmenopausal stage. Moreover, our findings highlight that chronobiological variations in nitrate metabolism and the timing of BRnitrate supplementation in relation to the IR injury protocol, may have confounded the observed results following 7-day BRnitratesupplementation. These studies also raise a new series of questions related to the mechanisms by which dietary nitrate may benefit postmenopausal cardiovascular health and support the pursuit of larger scale trials of dietary nitrate supplementation to determine whether these effects are in fact clinically significant and sustainable.
■590 ▼aSchool code: 0176.
■650 4▼aPlasma
■650 4▼aWomens health
■650 4▼aMortality
■650 4▼aRisk factors
■650 4▼aAntioxidants
■650 4▼aAtherosclerosis
■650 4▼aDrug dosages
■650 4▼aOxidative stress
■650 4▼aHormone replacement therapy
■650 4▼aMedicine
■650 4▼aMiddle age
■650 4▼aBlood pressure
■650 4▼aAging
■650 4▼aHypertension
■650 4▼aFunctional foods & nutraceuticals
■650 4▼aCardiovascular disease
■650 4▼aHeart
■650 4▼aIschemia
■650 4▼aMetabolites
■650 4▼aAngina pectoris
■650 4▼aEndocrinology
■650 4▼aFood science
■650 4▼aPharmaceutical sciences
■650 4▼aPublic health
■650 4▼aTherapy
■690 ▼a0493
■690 ▼a0564
■690 ▼a0409
■690 ▼a0359
■690 ▼a0572
■690 ▼a0573
■690 ▼a0212
■71020▼aThe Pennsylvania State University.
■7730 ▼tDissertations Abstracts International▼g86-03A.
■790 ▼a0176
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17162912▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


