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Brognara L, Luna OC, Traina F, Cauli O. Inflammatory Biomarkers and Gait Impairment in Older Adults: A Systematic Review. Int J Mol Sci 2024; 25:1368. [PMID: 38338653 PMCID: PMC10855721 DOI: 10.3390/ijms25031368] [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: 12/21/2023] [Revised: 01/15/2024] [Accepted: 01/21/2024] [Indexed: 02/12/2024] Open
Abstract
Peripheral inflammation and gait speed alterations are common in several neurological disorders and in the aging process, but the association between the two is not well established. The aim of this systematic literary review is to determine whether proinflammatory markers are a positive predictor for gait impairments and their complications, such as falls in older adults, and may represent a risk factor for slow gait speed and its complications. The systematic review was performed in line with the Preferred Report Items for Systematic Review and Meta-Analyses (PRISMA). A protocol for literature searches was structured a priori and designed according to the International Perspective Register of Systemic Review (PROSPERO: CRD42023451108). Peer-reviewed original articles were identified by searching seven electronic databases: Excerpta Medica Database (EMBASE), SciVerse (ScienceDirect), Scopus, PubMed, Medline, Web of Science, and the Cochrane Library. The search strategy was formulated based on a combination of controlled descriptors and/or keywords related to the topic and a manual search was conducted of the reference lists from the initially selected studies to identify other eligible studies. The studies were thoroughly screened using the following inclusion criteria: older adults, spatiotemporal gait characteristics, and proinflammatory markers. A meta-analysis was not performed due to the heterogeneity of the studies, and the results were narratively synthesized. Due to the clinical and methodological heterogeneity, the studies were combined in a narrative synthesis, grouped by the type of biomarkers evaluated. A standardized data extraction form was used to collect the following methodological outcome variables from each of the included studies: author, year, population, age, sample size, spatiotemporal gait parameters such as gait velocity, and proinflammatory markers such as TNF-α, high sensitivity C-reactive (CRP) proteins, and IL-6. We included 21 out of 51 studies in our review, which examined the association between inflammatory biomarkers and gait impairment. This review highlights the role of TNF-α, CRP, and IL-6 in gait impairment. Biomarkers play an important role in the decision-making process, and IL-6 can be an effective biomarker in establishing the diagnosis of slow gait speed. Further longitudinal research is needed to establish the use of molecular biomarkers in monitoring gait impairment.
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Affiliation(s)
- Lorenzo Brognara
- Department of Biomedical and Neuromotor Sciences (DIBINEM), Alma Mater Studiorum University of Bologna, 40123 Bologna, Italy;
| | - Oscar Caballero Luna
- Department of Nursing, University of Valencia, 46010 Valencia, Spain; (O.C.L.); (O.C.)
| | - Francesco Traina
- Department of Biomedical and Neuromotor Sciences (DIBINEM), Alma Mater Studiorum University of Bologna, 40123 Bologna, Italy;
| | - Omar Cauli
- Department of Nursing, University of Valencia, 46010 Valencia, Spain; (O.C.L.); (O.C.)
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Nordanstig J, Behrendt CA, Baumgartner I, Belch J, Bäck M, Fitridge R, Hinchliffe R, Lejay A, Mills JL, Rother U, Sigvant B, Spanos K, Szeberin Z, van de Water W, Antoniou GA, Björck M, Gonçalves FB, Coscas R, Dias NV, Van Herzeele I, Lepidi S, Mees BME, Resch TA, Ricco JB, Trimarchi S, Twine CP, Tulamo R, Wanhainen A, Boyle JR, Brodmann M, Dardik A, Dick F, Goëffic Y, Holden A, Kakkos SK, Kolh P, McDermott MM. Editor's Choice -- European Society for Vascular Surgery (ESVS) 2024 Clinical Practice Guidelines on the Management of Asymptomatic Lower Limb Peripheral Arterial Disease and Intermittent Claudication. Eur J Vasc Endovasc Surg 2024; 67:9-96. [PMID: 37949800 DOI: 10.1016/j.ejvs.2023.08.067] [Citation(s) in RCA: 28] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Accepted: 08/14/2023] [Indexed: 11/12/2023]
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Hallak AO, Hallak FZ, Hallak YO, Hallak OO, Hayson AW, Tanami SA, Bennett WL, Lavie CJ. Exercise Therapy in the Management of Peripheral Arterial Disease. Mayo Clin Proc Innov Qual Outcomes 2023; 7:476-489. [PMID: 37823000 PMCID: PMC10562863 DOI: 10.1016/j.mayocpiqo.2023.08.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/13/2023] Open
Abstract
The incidence and prevalence of peripheral artery disease (PAD) are increasing globally and have a marked economic burden in the United States. The American Heart Association/American College of Cardiology guidelines recommend exercise therapy as a Class 1A, but its utilization remains suboptimal. This state-of-the-art review aims to provide a comprehensive review of the most updated information available on PAD, along with its risk factors, management options, outcomes, economic burden, and the role of exercise therapy in managing PAD.
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Affiliation(s)
- Ahmad O. Hallak
- Department of Cardiology, Ochsner Medical Center, New Orleans, LA
| | | | - Yusuf O. Hallak
- School of Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai, UAE
| | | | - Aaron W. Hayson
- Department of Vascular Surgery, Ochsner Medical Center, New Orleans, LA
| | - Sadia A. Tanami
- Department of Internal Medicine, Texas Tech University Health Sciences Center, Amarillo
| | | | - Carl J. Lavie
- Department of Cardiology, Ochsner Medical Center, New Orleans, LA
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Ziegler L, Hedin U, Gottsäter A. Circulating Biomarkers in Lower Extremity Artery Disease. Eur Cardiol 2022; 17:e09. [PMID: 35401792 PMCID: PMC8978021 DOI: 10.15420/ecr.2021.58] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 01/31/2022] [Indexed: 12/24/2022] Open
Abstract
Lower extremity artery disease (LEAD), a chronic condition with disturbed lower extremity circulation due to narrowing of the arteries, is predominantly caused by atherosclerosis and is associated with the presence of cardiovascular risk factors and an increased risk of cardiovascular events. LEAD is prevalent among older individuals and predicted to rise with the ageing population. In progressive disease, the patient experiences symptoms of ischaemia when walking and, in advanced critical limb-threatening ischaemia, even at rest. However, LEAD is asymptomatic in most patients, delaying diagnosis and treatment. In this setting, circulating biomarkers may facilitate earlier diagnosis in selected individuals. This review provides a broad overview of the circulating biomarkers investigated to date in relation to LEAD and discusses their usefulness in clinical practice.
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Affiliation(s)
- Louise Ziegler
- Division of Internal Medicine, Department of Clinical Sciences, Karolinska Institute, Danderyd Hospital, Stockholm, Sweden
| | - Ulf Hedin
- Vascular Surgery Division, Department of Molecular Medicine and Surgery, Karolinska Institute, Stockholm, Sweden
| | - Anders Gottsäter
- Department of Medicine, Lund University, Malmö, Sweden; Department of Medicine, Skåne University Hospital, Malmö, Sweden
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Inflammation as a mechanism and therapeutic target in peripheral artery disease. Can J Cardiol 2022; 38:588-600. [PMID: 35114347 DOI: 10.1016/j.cjca.2022.01.026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 01/17/2022] [Accepted: 01/19/2022] [Indexed: 12/24/2022] Open
Abstract
Peripheral artery disease is one of three major clinical manifestations of atherosclerosis, the other two being coronary artery and cerebrovascular disease. Despite progress in surgery, antithrombotic therapy and therapies that modify conventional risk factors (lipid-, blood pressure-, and glucose-lowering interventions), patients with peripheral artery disease have unacceptably high risk of vascular complications. Additional strategies to reduce this residual risk are needed. The accumulated evidence that inflammation plays an important role in the pathogenesis of atherosclerosis has spurred recent efforts to evaluate anti-inflammatory agents as an additional therapeutic approach for atherothrombosis prevention and treatment. In this review, we examine the evidence supporting the role of inflammation in atherosclerosis, review recent trials evaluating anti-inflammatory approaches to reduce cardiovascular complications, and offer insights into the opportunities for novel anti-inflammatory strategies to reduce the burden of cardiovascular and limb complications in patients with peripheral artery disease.
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Impact of homocysteine levels on mortality risk in patients with chronic limb-threatening ischemia undergoing revascularization. Heart Vessels 2021; 36:1825-1829. [PMID: 34131779 PMCID: PMC8556169 DOI: 10.1007/s00380-021-01877-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 05/14/2021] [Indexed: 11/09/2022]
Abstract
The current study aimed to reveal the clinical impact of plasma homocysteine levels in chronic limb-threatening ischemia (CLTI) patients undergoing revascularization. This was a sub-analysis of a prospective multicenter registry of CLTI patients, named the Surgical reconstruction versus Peripheral INtervention in pAtients with critical limb isCHemia (SPINACH) study. The current analysis included 192 non-dialysis-dependent CLTI patients who underwent revascularization for CLTI, and whose plasma homocysteine levels at baseline were available. The association of clinical characteristics with homocysteine levels was evaluated with the linear regression model. The association of homocysteine levels with the mortality risk was investigated using the Cox proportional hazards regression model. Cystatin C-based estimated glomerular filtration rate (eGFR) was independently associated with log-transformed homocysteine levels; the adjusted standardized regression coefficient (95% confidence interval) was − 0.432 (− 0.657 to − 0.253; P < 0.001). Homocysteine levels were significantly associated with the mortality risk in the univariate model (P = 0.017); the unadjusted hazard ratio was 1.71 (1.13–2.50) per twofold increase. The association was significantly attenuated when adjusted for cystatin C-based eGFR (P < 0.001); the hazard ratio adjusted for cystatin C-based eGFR was 1.28 (0.80–1.90; P = 0.29). An apparent association of homocysteine levels with an increased risk of mortality could be explained by renal dysfunction. Future studies will be needed to validate the current findings.
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Beavers DP, Kritchevsky SB, Gill TM, Ambrosius WT, Anton SD, Fielding RA, King AC, Rejeski WJ, Lovato L, McDermott MM, Newman AB, Pahor M, Walkup MP, Tracy RP, Manini TM. Elevated IL-6 and CRP levels are associated with incident self-reported major mobility disability: A pooled analysis of older adults with slow gait speed. J Gerontol A Biol Sci Med Sci 2021; 76:2293-2299. [PMID: 33822946 DOI: 10.1093/gerona/glab093] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND Elevated Interleukine-6 (IL-6) and C-reactive protein (CRP) are associated with aging-related reductions in physical function, but little is known about their independent and combined relationships with major mobility disability (MMD), defined as the self-reported inability to walk a quarter-mile. METHODS We estimated the absolute and relative effect of elevated baseline IL-6, CRP, and their combination on self-reported MMD risk among older adults (≥68 years; 59% female) with slow gait speed (<1.0m/s). Participants were MMD-free at baseline. IL-6 and CRP were assessed using a central laboratory. The study combined a cohort of community dwelling high-functioning older adults (Health ABC) with two trials of low-functioning adults at risk of MMD (LIFE-P, LIFE). Analyses utilized Poisson regression for absolute MMD incidence and proportional hazards models for relative risk. RESULTS We found higher MMD risk per unit increase in log IL-6 [HR=1.26 (95% CI 1.13 to 1.41)]. IL-6 meeting pre-determined threshold considered to be high (>2.5 pg/mL) was similarly associated with higher risk of MMD [HR=1.31 (95% CI: 1.12 to 1.54)]. Elevated CRP (CRP >3.0 mg/L) was also associated with increased MMD risk [HR=1.38 (95% CI: 1.10 to 1.74)]. The CRP effect was more pronounced among participants with elevated IL-6 [HR=1.62 (95% CI: 1.12 to 2.33)] compared to lower IL-6 levels [HR=1.19 (95% CI: 0.85 to 1.66)]. CONCLUSIONS High baseline IL-6 and CRP were associated with increased risk of MMD among older adults with slow gait speed. A combined biomarker model suggests CRP was associated with MMD when IL-6 was elevated.
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Affiliation(s)
- Daniel P Beavers
- Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | | | - Thomas M Gill
- Yale School of Medicine, New Haven, Connecticut, USA
| | | | | | | | - Abby C King
- Departments of Epidemiology & Population Health and of Medicine (Stanford Prevention Research Center), Stanford University School of Medicine, California, USA
| | - W Jack Rejeski
- Wake Forest University, Winston-Salem, North California, USA
| | - Laura Lovato
- Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | | | | | | | - Michael P Walkup
- Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
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Saenz-Pipaon G, Martinez-Aguilar E, Orbe J, González Miqueo A, Fernandez-Alonso L, Paramo JA, Roncal C. The Role of Circulating Biomarkers in Peripheral Arterial Disease. Int J Mol Sci 2021; 22:ijms22073601. [PMID: 33808453 PMCID: PMC8036489 DOI: 10.3390/ijms22073601] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 03/25/2021] [Accepted: 03/26/2021] [Indexed: 12/18/2022] Open
Abstract
Peripheral arterial disease (PAD) of the lower extremities is a chronic illness predominantly of atherosclerotic aetiology, associated to traditional cardiovascular (CV) risk factors. It is one of the most prevalent CV conditions worldwide in subjects >65 years, estimated to increase greatly with the aging of the population, becoming a severe socioeconomic problem in the future. The narrowing and thrombotic occlusion of the lower limb arteries impairs the walking function as the disease progresses, increasing the risk of CV events (myocardial infarction and stroke), amputation and death. Despite its poor prognosis, PAD patients are scarcely identified until the disease is advanced, highlighting the need for reliable biomarkers for PAD patient stratification, that might also contribute to define more personalized medical treatments. In this review, we will discuss the usefulness of inflammatory molecules, matrix metalloproteinases (MMPs), and cardiac damage markers, as well as novel components of the liquid biopsy, extracellular vesicles (EVs), and non-coding RNAs for lower limb PAD identification, stratification, and outcome assessment. We will also explore the potential of machine learning methods to build prediction models to refine PAD assessment. In this line, the usefulness of multimarker approaches to evaluate this complex multifactorial disease will be also discussed.
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Affiliation(s)
- Goren Saenz-Pipaon
- Laboratory of Atherothrombosis, Program of Cardiovascular Diseases, Cima Universidad de Navarra, 31008 Pamplona, Spain; (G.S.-P.); (J.O.); (J.A.P.)
- IdiSNA, Instituto de Investigación Sanitaria de Navarra, 31008 Pamplona, Spain; (E.M.-A.); (A.G.M.); (L.F.-A.)
| | - Esther Martinez-Aguilar
- IdiSNA, Instituto de Investigación Sanitaria de Navarra, 31008 Pamplona, Spain; (E.M.-A.); (A.G.M.); (L.F.-A.)
- Departamento de Angiología y Cirugía Vascular, Complejo Hospitalario de Navarra, 31008 Pamplona, Spain
| | - Josune Orbe
- Laboratory of Atherothrombosis, Program of Cardiovascular Diseases, Cima Universidad de Navarra, 31008 Pamplona, Spain; (G.S.-P.); (J.O.); (J.A.P.)
- IdiSNA, Instituto de Investigación Sanitaria de Navarra, 31008 Pamplona, Spain; (E.M.-A.); (A.G.M.); (L.F.-A.)
- CIBERCV, Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Arantxa González Miqueo
- IdiSNA, Instituto de Investigación Sanitaria de Navarra, 31008 Pamplona, Spain; (E.M.-A.); (A.G.M.); (L.F.-A.)
- CIBERCV, Instituto de Salud Carlos III, 28029 Madrid, Spain
- Laboratory of Heart Failure, Program of Cardiovascular Diseases, Cima Universidad de Navarra, 31008 Pamplona, Spain
| | - Leopoldo Fernandez-Alonso
- IdiSNA, Instituto de Investigación Sanitaria de Navarra, 31008 Pamplona, Spain; (E.M.-A.); (A.G.M.); (L.F.-A.)
- Departamento de Angiología y Cirugía Vascular, Complejo Hospitalario de Navarra, 31008 Pamplona, Spain
| | - Jose Antonio Paramo
- Laboratory of Atherothrombosis, Program of Cardiovascular Diseases, Cima Universidad de Navarra, 31008 Pamplona, Spain; (G.S.-P.); (J.O.); (J.A.P.)
- IdiSNA, Instituto de Investigación Sanitaria de Navarra, 31008 Pamplona, Spain; (E.M.-A.); (A.G.M.); (L.F.-A.)
- CIBERCV, Instituto de Salud Carlos III, 28029 Madrid, Spain
- Hematology Service, Clínica Universidad de Navarra, 31008 Pamplona, Spain
| | - Carmen Roncal
- Laboratory of Atherothrombosis, Program of Cardiovascular Diseases, Cima Universidad de Navarra, 31008 Pamplona, Spain; (G.S.-P.); (J.O.); (J.A.P.)
- IdiSNA, Instituto de Investigación Sanitaria de Navarra, 31008 Pamplona, Spain; (E.M.-A.); (A.G.M.); (L.F.-A.)
- CIBERCV, Instituto de Salud Carlos III, 28029 Madrid, Spain
- Correspondence: ; Tel.: +34-948194700
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Ahmad A, Corban MT, Toya T, Sara JD, Lerman B, Park JY, Lerman LO, Lerman A. Coronary Microvascular Endothelial Dysfunction in Patients With Angina and Nonobstructive Coronary Artery Disease Is Associated With Elevated Serum Homocysteine Levels. J Am Heart Assoc 2020; 9:e017746. [PMID: 32993421 PMCID: PMC7792413 DOI: 10.1161/jaha.120.017746] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background Elevated levels of serum homocysteine, via impaired nitric oxide production, and coronary microvascular dysfunction are associated with increased risk of major adverse cardiovascular events. However, whether serum homocysteine levels and coronary microvascular endothelial dysfunction (CMED) are linked remains unknown. Methods and Results This study included 1418 patients with chest pain or an abnormal functional stress test and with nonobstructive coronary artery disease (<40% angiographic stenosis), who underwent CMED evaluation with functional angiography and had serum homocysteine levels measured. Patients were classified as having normal microvascular function versus CMED. Patients in the CMED group (n=743; 52%) had higher mean age (52.1±12.2 versus 50.0±12.4 years; P<0.0001), higher body mass index (29.1 [25.0-32.8] versus 27.5 [24.2-32.4]; P=0.001), diabetes mellitus (12.5% versus 9.4%; P=0.03), and fewer women (63.5% versus 68.7%; P=0.04) compared with patients in the normal microvascular function group. However, they had lower rates of smoking history, and mildly lower low-density lipoprotein cholesterol levels. Serum homocysteine levels were significantly higher in patients with CMED, and the highest quartile of serum homocysteine level (>9 µmol/L) was an independent predictor of CMED (odds ratio, 1.34 [95% CI, 1.03-1.75]; P=0.03) after adjustment for age; sex; body mass index; chronic kidney disease (CKD); diabetes mellitus; smoking exposure; low-density lipoprotein cholesterol; high-density lipoprotein cholesterol and triglycerides; and aspirin, statin, and B vitamin use. Conclusions Patients with CMED have significantly higher levels of serum homocysteine. Elevated serum homocysteine levels were associated with a significantly increased odds of an invasive diagnosis of CMED. The current study supports a potential role for homocysteine for diagnosis and target treatment in the patients with early coronary atherosclerosis.
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Affiliation(s)
- Ali Ahmad
- Department of Cardiovascular MedicineMayo ClinicRochesterMN
| | | | - Takumi Toya
- Department of Cardiovascular MedicineMayo ClinicRochesterMN
- Division of CardiologyNational Defense Medical CollegeTokorozawaSaitamaJapan
| | | | - Ben Lerman
- School of MedicineSt. George’s UniversityWest IndiesGrenada
| | - Ji Young Park
- Department of Cardiovascular MedicineMayo ClinicRochesterMN
- Division of CardiologyDepartment of Internal MedicineNowon Eulji Medical CenterEulji UniversitySeoulRepublic of Korea
| | | | - Amir Lerman
- Department of Cardiovascular MedicineMayo ClinicRochesterMN
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Emerging technologies for the prevention and management of diabetic foot ulcers. J Tissue Viability 2020; 29:61-68. [DOI: 10.1016/j.jtv.2020.03.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 12/27/2019] [Accepted: 03/14/2020] [Indexed: 12/14/2022]
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Toya T, Sara JD, Lerman B, Ahmad A, Taher R, Godo S, Corban MT, Lerman LO, Lerman A. Elevated plasma homocysteine levels are associated with impaired peripheral microvascular vasomotor response. IJC HEART & VASCULATURE 2020; 28:100515. [PMID: 32322661 PMCID: PMC7171522 DOI: 10.1016/j.ijcha.2020.100515] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 04/07/2020] [Accepted: 04/08/2020] [Indexed: 12/23/2022]
Abstract
Homocysteine > 10 μmol/L is associated with peripheral microvascular endothelial dysfunction (PMED). Homocysteine > 10 μmol/L was associated with PMED in older, obese, or hypertensive patients. The association of homocysteine and PMED was prominent in patients with B-vitamins. Homocysteine > 10 μmol/L was associated with higher major cardiovascular events in univariate analysis.
Background Hyperhomocysteinemia (HHcy) has been proposed as an important cardiovascular risk factor (cRF). However, little is known about the association between plasma homocysteine levels and peripheral microvascular endothelial dysfunction (PMED), which is an integrated index of vascular health. Methods This cross-sectional and retrospective cohort study included patients who underwent non-invasive PMED assessment using reactive hyperemia peripheral arterial tonometry (RH-PAT). The association between HHcy and PMED, and its impact on MACE (all-cause mortality and atherosclerotic cardiovascular events) was investigated. Results A total of 257 patients were enrolled (HHcy > 10.0 µmol/L, N = 51; lower levels of homocysteine [LHcy] ≤ 10 µmol/L, N = 206). Patients with HHcy were older, predominantly males, and with more comorbidities than patients with LHcy (p < 0.05 for all). RH-PAT index was lower in patients with HHcy versus LHcy (p = 0.01). A significant association between HHcy and PMED was observed in older (≥60 years), obese (≥30 kg/m2), present/past smokers and hypertensive patients. HHcy was significantly associated with PMED even after adjusting for other cRF and B-vitamins supplementation. HHcy was associated with an increased risk of MACE with a hazard ratio of 3.65 (95% CI 1.41–9.48, p = 0.01) and an adjusted hazard ratio of 2.44 (95% CI 0.91–6.51, p = 0.08) after adjustment for age (≥60 years). Conclusion HHcy was independently associated with PMED after adjusting for cRF and B-vitamins supplementation. Thus, the link between homocysteine and MACE could be mediated by endothelial dysfunction, and will require further clarification with future studies.
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Affiliation(s)
- Takumi Toya
- Department of Cardiovascular Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN, USA.,Division of Cardiology, National Defense Medical College, 3-2 Namiki, Tokorozawa, Saitama, Japan
| | - Jaskanwal D Sara
- Department of Cardiovascular Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN, USA
| | - Ben Lerman
- School of Medicine, St. George's University, St George's, West Indies, Grenada
| | - Ali Ahmad
- Department of Cardiovascular Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN, USA
| | - Riad Taher
- Department of Cardiovascular Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN, USA
| | - Shigeo Godo
- Department of Cardiovascular Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN, USA
| | - Michel T Corban
- Department of Cardiovascular Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN, USA
| | - Lilach O Lerman
- Division of Nephrology and Hypertension, Mayo Clinic, 200 First Street SW, Rochester, MN, USA
| | - Amir Lerman
- Department of Cardiovascular Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN, USA
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Rodrigues E, Silva I. Supervised exercise therapy in intermittent claudication: a systematic review of clinical impact and limitations. INT ANGIOL 2020; 39:60-75. [DOI: 10.23736/s0392-9590.19.04159-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Squires PJ, Pahor M, Manini TM, Brown JD. Effect of Gastric Acid Suppressants on Response to a Physical Activity Intervention and Major Mobility Disability in Older Adults: Results from the Lifestyle Interventions for Elders (LIFE) Study. Pharmacotherapy 2019; 39:816-826. [PMID: 31230397 DOI: 10.1002/phar.2299] [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: 11/09/2022]
Abstract
OBJECTIVES Proton pump inhibitors (PPIs) and histamine2 receptor antagonists (H2 RAs) are associated with pharmacologic effects that may be detrimental to mobility and response to physical activity. Mobility disability and injurious fall outcomes in PPI and H2 RA users were compared with nonusers in this secondary analysis of data from the Lifestyle Interventions for Elders (LIFE) study. METHODS Participants ages 70-89 years were randomized to a physical activity (PA) or successful aging intervention and evaluated by medication use. Confounders included baseline demographic characteristics, physical function, cognitive function, sleep quality, and acid reflux symptoms that were adjusted via propensity score weighting. Outcomes were incident and persistent major mobility disability (MMD and pMMD) and injurious falls. Weighted proportional hazard models evaluated independent and interaction effects of PPIs and H2 RAs. RESULTS No interaction was found between PPIs and H2 RAs and the PA intervention. Drug use associations were significant for H2 RAs (hazard ratio [HR] 1.74 [95% confidence interval [CI] 1.12-2.68]) and PPIs (HR 1.32 [95% CI 1.02-1.70]) compared with nonusers for pMMD. PPIs were associated with increased injurious falls compared with nonusers (HR 1.44 [95% CI 1.06-1.96]). Pooling of data from the H2 RA and PPI exposure groups showed a 26% increase in MMD (HR 1.26 [95% CI 1.07-1.48]), a 44% increase in pMMD (HR 1.44 [95% CI 1.16-1.77]), and a 48% increase in injurious falls (HR 1.48 [95% CI 1.15-1.91]) compared with nonusers. All direct comparisons between PPIs and H2 RAs were nonsignificant. CONCLUSIONS Compared with nonusers, participants using either PPIs or H2 RAs had an increased risk of MMD, pMMD, and injurious falls. It is not known if these effects are related to the individual pharmacology of each medication, reduced acid secretion, or the underlying disease state. Further study is required to determine causality.
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Affiliation(s)
- Patrick J Squires
- Department of Pharmaceutical Outcomes & Policy, University of Florida College of Pharmacy, Gainesville, Florida
| | - Marco Pahor
- Institute on Aging, Department of Aging and Geriatric Research, University of Florida College of Medicine, Gainesville, Florida
| | - Todd M Manini
- Institute on Aging, Department of Aging and Geriatric Research, University of Florida College of Medicine, Gainesville, Florida
| | - Joshua D Brown
- Department of Pharmaceutical Outcomes & Policy, University of Florida College of Pharmacy, Gainesville, Florida
- Center for Drug Evaluation & Safety, University of Florida, Gainesville, Florida
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Cardiovascular and musculoskeletal response to supervised exercise in patients with intermittent claudication. J Vasc Surg 2019; 69:1899-1908.e1. [DOI: 10.1016/j.jvs.2018.10.065] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Accepted: 10/06/2018] [Indexed: 12/24/2022]
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15
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Gardner AW, Parker DE, Montgomery PS. Changes in vascular and inflammatory biomarkers after exercise rehabilitation in patients with symptomatic peripheral artery disease. J Vasc Surg 2019; 70:1280-1290. [PMID: 30922751 DOI: 10.1016/j.jvs.2018.12.056] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Accepted: 12/26/2018] [Indexed: 12/11/2022]
Abstract
OBJECTIVE Home-based exercise is an alternative exercise mode to a structured supervised program to improve symptoms in patients with peripheral artery disease (PAD), but little is known about whether the slow-paced and less intense home program also elicits changes in vascular and inflammatory biomarkers. In an exploratory analysis from a randomized controlled trial, we compared changes in vascular and inflammatory biomarkers in patients with symptomatic PAD (typical and atypical of claudication) after home-based exercise and supervised exercise programs and in an attention-control group. METHODS A total of 114 patients were randomized into one of the three groups (n = 38 per group). Two groups performed exercise interventions, consisting of home-based and supervised programs of intermittent walking to mild to moderate claudication pain for 12 weeks; a third group performed light resistance training as a nonwalking attention-control group. Before and after intervention, patients were characterized on treadmill performance and endothelial effects of circulating factors present in sera by a cell culture-based bioassay on primary human arterial endothelial cells, and they were further evaluated on circulating vascular and inflammatory biomarkers. RESULTS Treadmill peak walking time increased (P = .008) in the two exercise groups but not in the control group (P > .05). Cultured endothelial cell apoptosis decreased after home-based exercise (P < .001) and supervised exercise (P = .007), and the change in the exercise groups combined was different from that in the control group (P = .005). For circulating biomarkers, increases were found in hydroxyl radical antioxidant capacity (P = .003) and vascular endothelial growth factor A (P = .037), and decreases were observed in E-selectin (P = .007) and blood glucose concentration (P = .012) after home-based exercise only. The changes in hydroxyl radical antioxidant capacity (P = .005), vascular endothelial growth factor A (P = .008), and E-selectin (P = .034) in the exercise groups combined were different from those in the control group. CONCLUSIONS This exploratory analysis found that both home-based and supervised exercise programs are efficacious to decrease cultured endothelial cell apoptosis in patients with symptomatic PAD. Furthermore, a monitored home-based exercise program elicits additional vascular benefits by improving circulating markers of endogenous antioxidant capacity, angiogenesis, endothelium-derived inflammation, and blood glucose concentration in patients with symptomatic PAD. The novel clinical significance is that important trends were found in this exploratory analysis that a contemporary home-based exercise program and a traditional supervised exercise program may favorably improve vascular and inflammatory biomarkers in addition to the well-described ambulatory improvements in symptomatic patients with PAD.
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Affiliation(s)
- Andrew W Gardner
- Department of Physical Medicine and Rehabilitation, Penn State College of Medicine, Hershey, Pa.
| | - Donald E Parker
- Department of Biostatistics and Epidemiology, University of Oklahoma Health Sciences Center, Oklahoma City, Okla
| | - Polly S Montgomery
- Department of Physical Medicine and Rehabilitation, Penn State College of Medicine, Hershey, Pa
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Disease-specific characteristics of vascular cell adhesion molecule-1 levels in patients with peripheral artery disease. Heart Vessels 2018; 34:976-983. [PMID: 30535754 PMCID: PMC6531410 DOI: 10.1007/s00380-018-1315-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Accepted: 11/30/2018] [Indexed: 12/25/2022]
Abstract
Peripheral arterial disease (PAD) is one of the most common manifestations of systemic atherosclerosis. The prevalence of unrecognized PAD is high, leading to a lack of opportunity to detect subjects at a high risk for cardiovascular events. Inflammatory processes play an important role in the disease initiation as well as in the disease progression. Vascular cell adhesion molecule 1 (VCAM-1), a biomarker of endothelial dysfunction, appears to be an important mediator in inflammatory processes. Therefore, we hypothesized that in patients with PAD, circulating VCAM-1 might be elevated due to its function in mediating adhesion of immune cells to the vascular endothelium in the process of endothelial dysfunction and inflammation, and, therefore, applicable as a diagnostic biomarker. A total of 126 non-consecutive patients were enrolled in this study, of whom 51 patients had typical clinical manifestations of PAD and as controls 75 patients with no history of PAD or cardiovascular disease. All serum samples were obtained either during hospitalization or during out-patient visits and analyzed for VCAM-1 by the ELISA. Compared with controls, median levels of VCAM-1 were significantly elevated in patients suffering from PAD (953 vs. 1352 pg/ml; p < 0.001). Furthermore, VCAM-1 appeared to be highly discriminative for the detection of PAD (AUC = 0.76; CI 0.67-0.83). We could not observe dynamics related to increasing disease stages according to Rutherford classes in patients with apparent PAD. VCAM-1 was shown to be a potential discriminator and biomarker for the severity of systemic atherosclerosis. In a logistic regression analysis, VCAM-1 was robustly associated with the diagnosis of PAD, even after correction for clinically relevant cofounders (namely age, arterial hypertension, diabetes and LDL levels). Thusly, VCAM-1 might serve as a biomarker for PAD screening and detection.
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Nowobilski R, Kusinska K, Bukowska-Strakova K, Nizankowski R, Nowak W, Mika P, Jozkowicz A, Szczeklik A, Dulak J. Exercise training in intermittent claudication: Effects on antioxidant genes, inflammatory mediators and proangiogenic progenitor cells. Thromb Haemost 2017; 108:824-31. [DOI: 10.1160/th12-04-0278] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2012] [Accepted: 07/28/2012] [Indexed: 01/13/2023]
Abstract
SummaryExercise training remains a therapy of choice in intermittent claudication (IC). However, too exhaustive exercise may cause ischaemic injury and inflammatory response. We tested the impact of three-month treadmill training and single treadmill exercise on antioxidant gene expressions, cytokine concentrations and number of marrow-derived proangiogenic progenitor cells (PPC) in the blood of IC patients. Blood samples of 12 patients were collected before and after training, before and 1, 3 and 6 hours after the single exercise. PPCs were analysed with flow cytometry, cytokine concentrations were checked with Milliplex MAP, while expression of mRNAs and miRNAs was evaluated with qRT-PCR. Treadmill training improved pain-free walking time (from 144 ± 44 seconds [s] to 311 ± 134 s, p=0.02) and maximum walking time (from 578 ± 293 s to 859 ± 423 s, p=0.01) in IC patients. Before, but not after training, the single treadmill exercise increased the number of circulating CD45dimCD34+CD133-KDR+ PPCs (p=0.048), decreased expression of HMOX1 (p=0.04) in circulating leukocytes, reduced tumour necrosis factor-α (p=0.03) and tended to elevate myeloperoxidase (p=0.06) concentrations in plasma. In contrast, total plasminogen activator inhibitor-1 was decreased by single exercise only after, but not before training (p=0.02). Both before and after training the single exercise decreased monocyte chemoattractant protein (MCP)-1 (p=0.006 and p=0.03) concentration and increased SOD1 (p=0.001 and p=0.01) expression. Patients after training had also less interleukin-6 (p=0.03), but more MCP-1 (p=0.04) in the blood. In conclusion, treadmill training improves walking performance of IC patients, attenuates the single exercise-induced changes in gene expressions or PPC mobilisation, but may also lead to higher production of some proinflammatory cytokines.
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Manini TM, Anton SD, Beavers DP, Cauley JA, Espeland MA, Fielding RA, Kritchevsky SB, Leeuwenburgh C, Lewis KH, Liu C, McDermott MM, Miller ME, Tracy RP, Walston JD, Radziszewska B, Lu J, Stowe C, Wu S, Newman AB, Ambrosius WT, Pahor M. ENabling Reduction of Low-grade Inflammation in SEniors Pilot Study: Concept, Rationale, and Design. J Am Geriatr Soc 2017; 65:1961-1968. [PMID: 28734043 PMCID: PMC5642998 DOI: 10.1111/jgs.14965] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
OBJECTIVES To test two interventions to reduce interleukin (IL)-6 levels, an indicator of low-grade chronic inflammation and an independent risk factor for impaired mobility and slow walking speed in older adults. DESIGN The ENabling Reduction of low-Grade Inflammation in SEniors (ENRGISE) Pilot Study was a multicenter, double-blind, placebo-controlled randomized pilot trial of two interventions to reduce IL-6 levels. SETTING Five university-based research centers. PARTICIPANTS Target enrollment was 300 men and women aged 70 and older with an average plasma IL-6 level between 2.5 and 30 pg/mL measured twice at least 1 week apart. Participants had low to moderate physical function, defined as self-reported difficulty walking one-quarter of a mile or climbing a flight of stairs and usual walk speed of less than 1 m/s on a 4-m usual-pace walk. INTERVENTION Participants were randomized to losartan, omega-3 fish oil (ω-3), combined losartan and ω-3, or placebo. Randomization was stratified depending on eligibility for each group. A titration schedule was implemented to reach a dose that was safe and effective for IL-6 reduction. Maximal doses were 100 mg/d for losartan and 2.8 g/d for ω-3. MEASUREMENTS IL-6, walking speed over 400 m, physical function (Short Physical Performance Battery), other inflammatory markers, safety, tolerability, frailty domains, and maximal leg strength were measured. RESULTS Results from the ENRGISE Pilot Study will provide recruitment yields, feasibility, medication tolerance and adherence, and preliminary data to help justify a sample size for a more definitive randomized trial. CONCLUSION The ENRGISE Pilot Study will inform a larger subsequent trial that is expected to have important clinical and public health implications for the growing population of older adults with low-grade chronic inflammation and mobility limitations.
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Affiliation(s)
- Todd M Manini
- Department of Aging and Geriatric Research, University of Florida, Gainesville, Florida
| | - Stephen D Anton
- Department of Aging and Geriatric Research, University of Florida, Gainesville, Florida
| | - Daniel P Beavers
- Department of Biostatistical Sciences, School of Medicine, Wake Forest University, Winston-Salem, North Carolina
| | - Jane A Cauley
- Department of Epidemiology, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Mark A Espeland
- Department of Biostatistical Sciences, School of Medicine, Wake Forest University, Winston-Salem, North Carolina
| | - Roger A Fielding
- Friedman School of Nutrition Science and Policy, Tufts University, Boston, Massachusetts
| | - Stephen B Kritchevsky
- Department of Biostatistical Sciences, School of Medicine, Wake Forest University, Winston-Salem, North Carolina
| | | | - Kristina H Lewis
- Department of Biostatistical Sciences, School of Medicine, Wake Forest University, Winston-Salem, North Carolina
| | - Christine Liu
- Friedman School of Nutrition Science and Policy, Tufts University, Boston, Massachusetts
| | - Mary M McDermott
- Division of General Internal Medicine and Geriatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Michael E Miller
- Department of Biostatistical Sciences, School of Medicine, Wake Forest University, Winston-Salem, North Carolina
| | - Russell P Tracy
- Department of Pathology & Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Jeremy D Walston
- Division of Geriatric Medicine and Gerontology, Johns Hopkins University, Baltimore, Maryland
| | - Barbara Radziszewska
- Division of Geriatrics and Clinical Gerontology, National Institute on Aging, Bethesda, Maryland
| | - Jane Lu
- Department of Aging and Geriatric Research, University of Florida, Gainesville, Florida
| | - Cindy Stowe
- Department of Biostatistical Sciences, School of Medicine, Wake Forest University, Winston-Salem, North Carolina
| | - Samuel Wu
- Department of Aging and Geriatric Research, University of Florida, Gainesville, Florida
| | - Anne B Newman
- Department of Epidemiology, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Walter T Ambrosius
- Department of Biostatistical Sciences, School of Medicine, Wake Forest University, Winston-Salem, North Carolina
| | - Marco Pahor
- Department of Aging and Geriatric Research, University of Florida, Gainesville, Florida
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Gardner AW, Montgomery PS, Zhao YD, Ungvari Z, Csiszar A, Sonntag WE. Endothelial Cell Inflammation and Antioxidant Capacity are Associated With 6-Minute Walk Performance in Patients With Symptomatic Peripheral Artery Disease. Angiology 2017; 69:416-423. [PMID: 28835113 DOI: 10.1177/0003319717726934] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
We determined whether 6-minute walk total distance and pain-free distance were associated with circulating biomarkers of antioxidant capacity and inflammation and with cultured endothelial cell inflammation, oxidative stress, and apoptosis in 251 patients with symptomatic peripheral artery disease (PAD). In multivariate analyses, pain-free distance during the 6-minute walk test was negatively associated with dyslipidemia ( P < .001), chronic kidney disease ( P = .004), and transient transfection, nuclear factor κ-Light-Chain-Enhancer of activated B (NF-κB) cultured endothelial cells ( P = .007) and was positively associated with height ( P = .008). Furthermore, total distance walked during the 6-minute walk test was negatively associated with cultured endothelial cell NF-κB ( P < .001), coronary artery disease ( P = .009), and body mass index ( P = .022) and was positively associated with ankle-brachial index ( P < .001), male sex ( P < .001), and hydroxyl radical antioxidant capacity ( P < .001). The 6-minute walk performance in symptomatic patients with PAD was associated with vascular biomarkers, as walking distances were negatively associated with cultured endothelial cell inflammation and positively associated with circulating antioxidant capacity. The clinical implication is that behavioral interventions designed to alleviate endothelial cell inflammation and increase circulating antioxidant capacity, such as exercise and antioxidant intake, may improve ambulation of patients with PAD during submaximal exercise that is typically performed during daily activities.
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Affiliation(s)
- Andrew W Gardner
- 1 Reynolds Oklahoma Center on Aging, Donald W. Reynolds Department of Geriatric Medicine, University of Oklahoma Health Sciences Center (OUHSC), Oklahoma City, OK, USA.,2 Department of Physical Medicine and Rehabilitation, Penn State College of Medicine, Hershey, PA, USA
| | - Polly S Montgomery
- 1 Reynolds Oklahoma Center on Aging, Donald W. Reynolds Department of Geriatric Medicine, University of Oklahoma Health Sciences Center (OUHSC), Oklahoma City, OK, USA
| | - Yan D Zhao
- 3 Department of Biostatistics and Epidemiology, OUHSC, Oklahoma City, OK, USA
| | - Zoltan Ungvari
- 1 Reynolds Oklahoma Center on Aging, Donald W. Reynolds Department of Geriatric Medicine, University of Oklahoma Health Sciences Center (OUHSC), Oklahoma City, OK, USA
| | - Anna Csiszar
- 1 Reynolds Oklahoma Center on Aging, Donald W. Reynolds Department of Geriatric Medicine, University of Oklahoma Health Sciences Center (OUHSC), Oklahoma City, OK, USA
| | - William E Sonntag
- 1 Reynolds Oklahoma Center on Aging, Donald W. Reynolds Department of Geriatric Medicine, University of Oklahoma Health Sciences Center (OUHSC), Oklahoma City, OK, USA
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Gardner AW, Montgomery PS, Zhao YD, Silva-Palacios F, Ungvari Z, Csiszar A, Sonntag WE. Association between daily walking and antioxidant capacity in patients with symptomatic peripheral artery disease. J Vasc Surg 2017; 65:1762-1768. [PMID: 28259579 DOI: 10.1016/j.jvs.2016.12.108] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Accepted: 12/13/2016] [Indexed: 12/27/2022]
Abstract
OBJECTIVE The primary aim of the study was to assess whether both the amount and pace of daily walking were associated with circulating antioxidant capacity in symptomatic patients with peripheral artery disease (PAD). METHODS Community-based walking was measured in 244 men and women who were limited by symptomatic PAD during a 1-week period in which they wore an ankle-mounted step activity monitor. Patients were further characterized by circulating antioxidant capacity with the OxiSelect (Cell Biolabs Inc, San Diego, Calif) hydroxyl radical antioxidant capacity (HORAC) activity assay. RESULTS To assess the amount of walking, patients were grouped into low (≤2440 strides/d), middle (2441-3835 strides/d), and high (>3835 strides/d) stride tertiles. HORAC was higher in the middle (P = .03) and high (P = .01) stride tertiles than in the low tertile, but there was no difference between middle and high tertiles (P = .44). To assess the pace of walking, patients were grouped into slow (<25.0 strides/min), middle (25.0-31.6 strides/min), and fast (>31.6 strides/min) cadence tertiles. HORAC was higher in the high cadence tertile than in the low (P < .01) and middle (P < .01) tertiles, but there was no difference between low and middle tertiles (P = .48). Similar findings were obtained on group differences in HORAC after adjusting for age, sex, race, and ankle-brachial index for both the amount and pace of daily walking. CONCLUSIONS Walking >2440 strides each day and walking at a cadence faster than 31.6 strides/min for 30 minutes each day are both associated with greater circulating antioxidant capacity in symptomatic patients with PAD. The clinical significance is that a home-based walking program may be one approach to increase endogenous antioxidant capacity.
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Affiliation(s)
- Andrew W Gardner
- Reynolds Oklahoma Center on Aging, Donald W. Reynolds Department of Geriatric Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, Okla.
| | - Polly S Montgomery
- Reynolds Oklahoma Center on Aging, Donald W. Reynolds Department of Geriatric Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, Okla
| | - Yan D Zhao
- Department of Biostatistics and Epidemiology, University of Oklahoma Health Sciences Center, Oklahoma City, Okla
| | - Federico Silva-Palacios
- Cardiovascular Section, Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, Okla
| | - Zoltan Ungvari
- Reynolds Oklahoma Center on Aging, Donald W. Reynolds Department of Geriatric Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, Okla
| | - Anna Csiszar
- Reynolds Oklahoma Center on Aging, Donald W. Reynolds Department of Geriatric Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, Okla
| | - William E Sonntag
- Reynolds Oklahoma Center on Aging, Donald W. Reynolds Department of Geriatric Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, Okla
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Affiliation(s)
- Naomi M. Hamburg
- Whitaker Cardiovascular Institute, Boston University School of Medicine
- the Section of Vascular Biology, Department of Medicine, Boston Medical Center
| | - Mark A. Creager
- Dartmouth-Hitchcock Heart and Vascular Center and the Geisel School of Medicine at Dartmouth
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Hazarika S, Annex BH. Biomarkers and Genetics in Peripheral Artery Disease. Clin Chem 2016; 63:236-244. [PMID: 27872083 DOI: 10.1373/clinchem.2016.263798] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Accepted: 10/31/2016] [Indexed: 11/06/2022]
Abstract
BACKGROUND Peripheral artery disease (PAD) is highly prevalent and there is considerable diversity in the initial clinical manifestation and disease progression among individuals. Currently, there is no ideal biomarker to screen for PAD, to risk stratify patients with PAD, or to monitor therapeutic response to revascularization procedures. Advances in human genetics have markedly enhanced the ability to develop novel diagnostic and therapeutic approaches across a host of human diseases, but such developments in the field of PAD are lagging. CONTENT In this article, we will discuss the epidemiology, traditional risk factors for, and clinical presentations of PAD. We will discuss the possible role of genetic factors and gene-environment interactions in the development and/or progression of PAD. We will further explore future avenues through which genetic advances can be used to better our understanding of the pathophysiology of PAD and potentially find newer therapeutic targets. We will discuss the potential role of biomarkers in identifying patients at risk for PAD and for risk stratifying patients with PAD, and novel approaches to identification of reliable biomarkers in PAD. SUMMARY The exponential growth of genetic tools and newer technologies provides opportunities to investigate and identify newer pathways in the development and progression of PAD, and thereby in the identification of newer biomarkers and therapies.
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Affiliation(s)
- Surovi Hazarika
- Division of Cardiovascular Medicine and Robert Bernie Cardiovascular Research Center, University of Virginia, Charlottesville, VA
| | - Brian H Annex
- Division of Cardiovascular Medicine and Robert Bernie Cardiovascular Research Center, University of Virginia, Charlottesville, VA.
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Windham BG, Wilkening SR, Lirette ST, Kullo IJ, Turner ST, Griswold ME, Mosley TH. Associations Between Inflammation and Physical Function in African Americans and European Americans with Prevalent Cardiovascular Risk Factors. J Am Geriatr Soc 2016; 64:1448-55. [PMID: 27310030 DOI: 10.1111/jgs.14229] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
OBJECTIVES To examine associations between inflammation and physical function and potential mediation by white matter hyperintensities (WMHs) in African Americans (AAs) and European Americans (EAs). DESIGN Cross-sectional analysis using linear and logistic models with generalized estimating equations to account for family clustering, reporting results as regression coefficients (β) and odds ratios (ORs) adjusted for education, alcohol, exercise, body mass index, hypertension, diabetes mellitus, heart disease, cognition, ankle-brachial index, race (site), and supported interactions. SETTING Genetic Epidemiology Network of Arteriopathy-Genetics of Microangiopathic Brain Injury Study cohort. PARTICIPANTS AA and EA sibships with two or more siblings with hypertension before age 60 (N = 1,960; 65% female, 51% AA, aged 26-91, 50% obese, 72% hypertensive). MEASUREMENTS Inflammation (C-reactive protein (CRP), interleukin-6 (IL6), soluble tumor necrosis factor receptors (sTNFRs) 1 and 2, WMH volume (cm(3) ) according to magnetic resonance imaging), walking speed (cm/s) over 25 feet, and mobility difficulty (any self-reported difficulty walking half a mile). RESULTS In separate models, inflammatory markers were associated with walking speed (sTNFR1: β = -2.74, P < .001; sTNFR2: β = -1.23, P = .03; CRP: β = -1.95, P = .001; IL6: β = -1.24, P = .03) and mobility difficulty (sTNFR1: OR = 1.36, P = .001; sTNFR2: OR = 1.25, P = .005; CRP: OR = 1.22, P = .005; IL6: OR = 1.18, P = .02); the association between WMH volume and sTNFR1 in AA (β = 0.07, P = .06) did not reach typical statistical thresholds. WMH volume was associated with walking speed in AA (β = -3.17, P = .02) but not with mobility difficulty (OR = 1.10, P = .54). Adjusting for WMH did not change associations. CONCLUSION In young, middle-aged, and older adults with prevalent cardiovascular risk factors, multiple inflammatory biomarkers were associated with slower walking speed independent of microvascular disease in the brain. There was little evidence of mediation by brain WMH volume. Inflammation may contribute to physical function impairments through pathways other than brain microvascular disease, particularly in AAs.
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Affiliation(s)
- B Gwen Windham
- Division of Geriatrics, Department of Medicine, University of Mississippi Medical Center, Jackson, Mississippi
| | - Steven R Wilkening
- School of Medicine, University of Mississippi Medical Center, Jackson, Mississippi
| | - Seth T Lirette
- Center of Biostatistics and Bioinformatics, University of Mississippi Medical Center, Jackson, Mississippi
| | - Iftikhar J Kullo
- Division of Cardiovascular Diseases, Mayo Clinic, Rochester, Minnesota
| | - Stephen T Turner
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, Minnesota
| | - Michael E Griswold
- Center of Biostatistics and Bioinformatics, University of Mississippi Medical Center, Jackson, Mississippi
| | - Thomas H Mosley
- Division of Geriatrics, Department of Medicine, University of Mississippi Medical Center, Jackson, Mississippi
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Gardner AW, Montgomery PS, Casanegra AI, Silva-Palacios F, Ungvari Z, Csiszar A. Association between gait characteristics and endothelial oxidative stress and inflammation in patients with symptomatic peripheral artery disease. AGE (DORDRECHT, NETHERLANDS) 2016; 38:64. [PMID: 27273077 PMCID: PMC5005916 DOI: 10.1007/s11357-016-9925-y] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2016] [Accepted: 05/18/2016] [Indexed: 05/06/2023]
Abstract
The aim of the study was to determine whether gait characteristics were associated with endothelial cell inflammation, oxidative stress, and apoptosis and with circulating biomarkers of inflammation and antioxidant capacity in older patients with symptomatic peripheral artery disease (PAD). Gait measurements of 231 symptomatic men and women with PAD were assessed during a 4-m walk test. Patients were further characterized on endothelial effects of circulating factors present in the sera using a cell culture-based bioassay on primary human arterial endothelial cells and on circulating inflammatory and vascular biomarkers. In a multivariate regression model for gait speed, the significant independent variables were age (p < 0.001), intercellular cell adhesion molecule-1 (ICAM-1) (p < 0.001), diabetes (p = 0.003), sex (p = 0.003), and history of cerebrovascular accidents (p = 0.021). In multivariate analyses for gait cadence, the significant independent predictors included high-sensitivity C-reactive protein (HsCRP) (p < 0.001), diabetes (p = 0.001), and hypertension (p = 0.001). In a multivariate regression model for gait stride length, the significant independent variables were HsCRP (p < 0.001), age (p < 0.001), ICAM-1 (p < 0.001), hypertension (p = 0.002), cellular reactive oxygen species production (p = 0.007), and sex (p = 0.008). Higher levels of circulating biomarkers of inflammation and endothelial cell oxidative stress were associated with slower gait speed, slower cadence, and shorter stride length in older symptomatic patients with PAD. Additionally, this profile of impaired gait was more evident in older patients, in women, and in those with diabetes, hypertension, and history of cerebrovascular accidents.
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Affiliation(s)
- Andrew W Gardner
- Reynolds Oklahoma Center on Aging, Donald W. Reynolds Department of Geriatric Medicine, University of Oklahoma Health Sciences Center (OUHSC), 1122 N.E. 13th Street, O'Donoghue Research Building, Suite 1200, Oklahoma City, OK, 73117, USA.
- Veterans Affairs Medical Center, Oklahoma City, OK, USA.
| | - Polly S Montgomery
- Reynolds Oklahoma Center on Aging, Donald W. Reynolds Department of Geriatric Medicine, University of Oklahoma Health Sciences Center (OUHSC), 1122 N.E. 13th Street, O'Donoghue Research Building, Suite 1200, Oklahoma City, OK, 73117, USA
| | - Ana I Casanegra
- Cardiovascular Section, Department of Medicine, OUHSC, Oklahoma City, OK, USA
| | | | - Zoltan Ungvari
- Reynolds Oklahoma Center on Aging, Donald W. Reynolds Department of Geriatric Medicine, University of Oklahoma Health Sciences Center (OUHSC), 1122 N.E. 13th Street, O'Donoghue Research Building, Suite 1200, Oklahoma City, OK, 73117, USA
| | - Anna Csiszar
- Reynolds Oklahoma Center on Aging, Donald W. Reynolds Department of Geriatric Medicine, University of Oklahoma Health Sciences Center (OUHSC), 1122 N.E. 13th Street, O'Donoghue Research Building, Suite 1200, Oklahoma City, OK, 73117, USA
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Scott JM, Armenian S, Giralt S, Moslehi J, Wang T, Jones LW. Cardiovascular disease following hematopoietic stem cell transplantation: Pathogenesis, detection, and the cardioprotective role of aerobic training. Crit Rev Oncol Hematol 2016; 98:222-34. [PMID: 26643524 PMCID: PMC5003053 DOI: 10.1016/j.critrevonc.2015.11.007] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Revised: 11/10/2015] [Accepted: 11/11/2015] [Indexed: 01/02/2023] Open
Abstract
Advances in hematopoietic cell transplantation (HCT) techniques and supportive care strategies have led to dramatic improvements in relapse mortality in patients with high-risk hematological malignancies. These improvements, however, conversely increase the risk of late-occurring non-cancer competing causes, mostly cardiovascular disease (CVD). HCT recipients have a significantly increased risk of CVD-specific mortality, including elevated incidence of coronary artery disease (CAD), cerebrovascular disease, and heart failure (HF) compared to age-matched counterparts. Accordingly, there is an urgent need to identify techniques for the detection of early CVD in HCT patients to inform early prevention strategies. Aerobic training (AT) is established as the cornerstone of primary and secondary disease prevention in multiple clinical settings, and may confer similar benefits in HCT patients at high-risk of CVD. The potential benefits of AT either before, immediately after, or in the months/years following HCT have received limited attention. Here, we discuss the risk and extent of CVD in adult HCT patients, highlight novel tools for early detection of CVD, and review existing evidence in oncology and non-oncology populations supporting the efficacy of AT to attenuate HCT-induced CVD. This knowledge can be utilized to optimize treatment, while minimizing CVD risk in individuals with hematological malignancies undergoing HCT.
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Affiliation(s)
- Jessica M Scott
- Universities Space Research Association NASA Johnson Space Center, Houston, TX, USA
| | - Saro Armenian
- City of Hope Comprehensive Cancer Center, Duarte, CA, USA
| | - Sergio Giralt
- Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | | | | | - Lee W Jones
- Memorial Sloan Kettering Cancer Center, New York, NY, USA.
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Anton SD, Woods AJ, Ashizawa T, Barb D, Buford TW, Carter CS, Clark DJ, Cohen RA, Corbett DB, Cruz-Almeida Y, Dotson V, Ebner N, Efron PA, Fillingim RB, Foster TC, Gundermann DM, Joseph AM, Karabetian C, Leeuwenburgh C, Manini TM, Marsiske M, Mankowski RT, Mutchie HL, Perri MG, Ranka S, Rashidi P, Sandesara B, Scarpace PJ, Sibille KT, Solberg LM, Someya S, Uphold C, Wohlgemuth S, Wu SS, Pahor M. Successful aging: Advancing the science of physical independence in older adults. Ageing Res Rev 2015; 24:304-27. [PMID: 26462882 DOI: 10.1016/j.arr.2015.09.005] [Citation(s) in RCA: 163] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Revised: 09/08/2015] [Accepted: 09/30/2015] [Indexed: 02/08/2023]
Abstract
The concept of 'successful aging' has long intrigued the scientific community. Despite this long-standing interest, a consensus definition has proven to be a difficult task, due to the inherent challenge involved in defining such a complex, multi-dimensional phenomenon. The lack of a clear set of defining characteristics for the construct of successful aging has made comparison of findings across studies difficult and has limited advances in aging research. A consensus on markers of successful aging is furthest developed is the domain of physical functioning. For example, walking speed appears to be an excellent surrogate marker of overall health and predicts the maintenance of physical independence, a cornerstone of successful aging. The purpose of the present article is to provide an overview and discussion of specific health conditions, behavioral factors, and biological mechanisms that mark declining mobility and physical function and promising interventions to counter these effects. With life expectancy continuing to increase in the United States and developed countries throughout the world, there is an increasing public health focus on the maintenance of physical independence among all older adults.
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de Müllenheim PY, Chaudru S, Mahé G, Prioux J, Le Faucheur A. Clinical Interest of Ambulatory Assessment of Physical Activity and Walking Capacity in Peripheral Artery Disease. Scand J Med Sci Sports 2015; 26:716-30. [PMID: 26173488 DOI: 10.1111/sms.12512] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/22/2015] [Indexed: 12/14/2022]
Abstract
The purpose of the present review was to provide, for the first time, a comprehensive analysis and synthesis of the available studies that highlighted the clinical interest of the ambulatory assessment of either physical activity (PA) or walking capacity in patients with lower extremity peripheral artery disease (PAD). We identified 96 related articles published up to March 2015 through a computer-assisted search of the MEDLINE, EMBASE, and Web of Science databases. Ambulatory-measured PA or related energy expenditure (EE) in PAD patients was performed in 87 of the 96 included studies. The main clinical interests of these measurements were (a) the assessment of PA/EE pattern; (b) the characterization of walking pattern; and (c) the control of training load during home-based walking programs. Ambulatory-measured walking capacity was performed in the remaining studies, using either Global Positioning System receivers or the Peripheral Arterial Disease Holter Control device. Highlighted clinical interests were (a) the assessment of community-based walking capacity; (b) the use of new outcomes to characterize walking capacity, besides the conventional absolute claudication distance; and (c) the association with the patient's self-perception of walking capacity. This review also provides for the clinicians step-by-step recommendations to specifically assess PA or walking capacity in PAD patients.
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Affiliation(s)
- P-Y de Müllenheim
- Movement, Sport and Health Laboratory, University of Rennes 2, Rennes, France
| | - S Chaudru
- INSERM, Centre d'Investigation Clinique, Rennes, France
| | - G Mahé
- INSERM, Centre d'Investigation Clinique, Rennes, France.,CHU Rennes, Imagerie Coeur-Vaisseaux, Rennes, France
| | - J Prioux
- Movement, Sport and Health Laboratory, University of Rennes 2, Rennes, France.,Department of Sport Sciences and Physical Education, ENS Rennes, Bruz, France
| | - A Le Faucheur
- Movement, Sport and Health Laboratory, University of Rennes 2, Rennes, France.,INSERM, Centre d'Investigation Clinique, Rennes, France.,Department of Sport Sciences and Physical Education, ENS Rennes, Bruz, France
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A review of the pathophysiology and potential biomarkers for peripheral artery disease. Int J Mol Sci 2015; 16:11294-322. [PMID: 25993296 PMCID: PMC4463701 DOI: 10.3390/ijms160511294] [Citation(s) in RCA: 114] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Revised: 03/29/2015] [Accepted: 04/08/2015] [Indexed: 12/12/2022] Open
Abstract
Peripheral artery disease (PAD) is due to the blockage of the arteries supplying blood to the lower limbs usually secondary to atherosclerosis. The most severe clinical manifestation of PAD is critical limb ischemia (CLI), which is associated with a risk of limb loss and mortality due to cardiovascular events. Currently CLI is mainly treated by surgical or endovascular revascularization, with few other treatments in routine clinical practice. There are a number of problems with current PAD management strategies, such as the difficulty in selecting the appropriate treatments for individual patients. Many patients undergo repeated attempts at revascularization surgery, but ultimately require an amputation. There is great interest in developing new methods to identify patients who are unlikely to benefit from revascularization and to improve management of patients unsuitable for surgery. Circulating biomarkers that predict the progression of PAD and the response to therapies could assist in the management of patients. This review provides an overview of the pathophysiology of PAD and examines the association between circulating biomarkers and PAD presence, severity and prognosis. While some currently identified circulating markers show promise, further larger studies focused on the clinical value of the biomarkers over existing risk predictors are needed.
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Abstract
Biochemical markers have the potential to aid the vascular specialist in many ways. On a daily basis, we rely on such markers as d-dimer to help exclude thromboembolic disease and thus limit low-probability ultrasound imaging. Additionally, we use troponin levels to determine myocardial events perioperatively. During the past decade, use of the inflammatory marker C-reactive protein has been recommended by the American Heart Association to further stratify patient cardiovascular risk, and has been studied more extensively in patients with peripheral vascular disease. This review details clinical information published during the past several decades on the application of serum C-reactive protein levels in peripheral arterial disease patients in correlation with disease severity and likelihood of future cardiovascular events, including recent predictive models.
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Affiliation(s)
- Patrick A Stone
- Division of Vascular and Endovascular Surgery, West Virginia University-Charleston Division, 1002 Louden Heights, Charleston, WV 25314.
| | - Michael Yacoub
- Division of Vascular and Endovascular Surgery, West Virginia University-Charleston Division, 1002 Louden Heights, Charleston, WV 25314
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Gardner AW, Parker DE, Montgomery PS, Sosnowska D, Casanegra AI, Ungvari Z, Csiszar A, Sonntag WE. Endothelial Cell Inflammation and Antioxidant Capacity are Associated With Exercise Performance and Microcirculation in Patients With Symptomatic Peripheral Artery Disease. Angiology 2015; 66:867-74. [PMID: 25603804 DOI: 10.1177/0003319714566863] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
We determined whether exercise performance and lower extremity microcirculation were associated with endothelial cell inflammation, oxidative stress, and apoptosis and with circulating biomarkers of inflammation and antioxidant capacity in 160 patients with symptomatic peripheral artery disease (PAD). In a multivariate regression model for peak walking time, significant independent variables included ankle-brachial index (P < .001), age (P = .017), hydroxyl radical antioxidant capacity (P = .008), and endothelial cell nuclear factor K-light-chain-enhancer of activated B cells (NF-κB) activity (P = .015). In multivariate analyses for time to minimum exercise calf muscle hemoglobin oxygen saturation (StO2), significant independent variables included endothelial cell NF-κB activity (P = .043) and calf muscle StO2 at rest (P = .007). Endothelial cell inflammation and circulating biomarkers of inflammation and antioxidant capacity were associated with exercise performance and microcirculation of the ischemic calf musculature during exercise. The clinical implication is that interventions designed to alleviate endothelial cell inflammation and circulating inflammatory biomarkers, such as antioxidant therapy, may improve exercise performance of symptomatic patients with PAD.
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Affiliation(s)
- Andrew W Gardner
- Donald W. Reynolds Department of Geriatric Medicine, Reynolds Oklahoma Center on Aging, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA Veterans Affairs Medical Center, Oklahoma City, OK, USA
| | - Donald E Parker
- Department of Biostatistics and Epidemiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Polly S Montgomery
- Donald W. Reynolds Department of Geriatric Medicine, Reynolds Oklahoma Center on Aging, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Danuta Sosnowska
- Donald W. Reynolds Department of Geriatric Medicine, Reynolds Oklahoma Center on Aging, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Ana I Casanegra
- Cardiovascular Section, Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Zoltan Ungvari
- Donald W. Reynolds Department of Geriatric Medicine, Reynolds Oklahoma Center on Aging, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Anna Csiszar
- Donald W. Reynolds Department of Geriatric Medicine, Reynolds Oklahoma Center on Aging, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - William E Sonntag
- Donald W. Reynolds Department of Geriatric Medicine, Reynolds Oklahoma Center on Aging, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
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Sung JH, Lee JE, Samdarshi TE, Nagarajarao HS, Taylor JK, Agrawal KK, Taylor HA, Fox ER. C-reactive protein and subclinical cardiovascular disease among African-Americans: (the Jackson Heart Study). J Cardiovasc Med (Hagerstown) 2014; 15:371-6. [PMID: 24751480 DOI: 10.2459/jcm.0b013e32836411d6] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
OBJECTIVE Systemic inflammation has been implicated as an early marker for subclinical cardiovascular disease; however, findings have been inconsistent in the African-American population. METHODS We examined the relation of C-reactive protein (CRP) to subclinical disease in African-American participants of the Jackson Heart Study first examination. Subclinical disease evaluated included aortic valve calcification (AVC), carotid intima-medial thickness (IMT) and peripheral arterial disease (PAD). We assessed the relation of CRP to subclinical disease, adjusting for age, BMI, sex, SBP and DBP, diabetes, total/high-density lipoprotein cholesterol, triglycerides, smoking, antihypertensive therapy, lipid-lowering therapy and hormone replacement therapy. RESULTS In the study population approximately, 5.1% of participants had AVC and 6.7% had PAD. In the age-adjusted and sex-adjusted model, CRP was significantly related to AVC (P = 0.02) and carotid IMT (P = 0.02). However, in the multivariable-adjusted logistic regression analysis, CRP was significantly related to AVC (P = 0.02) and to PAD (P = 0.04) but not to carotid IMT (P = 0.18). CONCLUSION We describe significant associations between CRP and AVC and PAD in a population-based cohort of African-Americans.
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Affiliation(s)
- Jung Hye Sung
- aSchool of Health Sciences bRTRN Data Coordinating Center, Jackson State University cUniversity of Mississippi School of Medicine, Jackson, Mississippi, USA
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Ahimastos AA, Latouche C, Natoli AK, Reddy-luthmoodoo M, Golledge J, Kingwell BA. Potential Vascular Mechanisms of Ramipril Induced Increases in Walking Ability in Patients With Intermittent Claudication. Circ Res 2014; 114:1144-55. [DOI: 10.1161/circresaha.114.302420] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Rationale:
We recently reported that ramipril more than doubled maximum walking times in patients with peripheral artery disease with intermittent claudication.
Objective:
Our aim was to conduct exploratory analyses of the effects of ramipril therapy on circulating biomarkers of angiogenesis/arteriogenesis, thrombosis, inflammation, and leukocyte adhesion in patients with intermittent claudication.
Methods and Results:
One hundred sixty-five patients with intermittent claudication (mean, 65.3 [SD, 6.7] years) were administered ramipril 10 mg per day (n=82) or matching placebo (n=83) for 24 weeks in a randomized, double-blind study. Plasma biomarkers of angiogenesis/arteriogenesis (vascular endothelial growth factor-A, fibroblast growth factor-2), thrombosis (D-dimer, von Willebrand factor, thrombin-antithrombin III), inflammation (high-sensitivity C-reactive protein, osteopontin), and leukocyte adhesion (soluble vascular cell adhesion molecule-1, soluble intracellular adhesion molecule-1) were measured at baseline and 24 weeks. Relative to placebo, ramipril was associated with increases in vascular endothelial growth factor-A by 38% (95% confidence interval [CI], 34%–42%) and fibroblast growth factor-2 by 64% (95% CI, 44–85%;
P
<0.001 for both), and reductions in D-dimer by 24% (95% CI, −30% to −18%), von Willebrand factor by 22% (95% CI, −35% to −9%), thrombin-antithrombin III by 16% (95% CI, −19% to −13%), high-sensitivity C-reactive protein by 13% (95% CI, −14% to −9%), osteopontin by 12% (95% CI, −14% to −10%), soluble vascular cell adhesion molecule-1 by 14% (95% CI, −18% to −10%), and soluble intracellular adhesion molecule-1 by 15% (95% CI, −17% to −13%; all
P
<0.001). With the exception of von Willebrand factor, all the above changes correlated significantly with the change in maximum walking time (
P
=0.02−0.001) in the group treated with ramipril.
Conclusions:
Ramipril is associated with an increase in the biomarkers of angiogenesis/arteriogenesis and reduction in the markers of thrombosis, inflammation, and leukocyte adhesion. This study informs strategies to improve mobility in patients with intermittent claudication.
Clinical Trial Registration Information:
URL:
http://clinicaltrials.gov
. Unique identifier: NCT00681226.
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Affiliation(s)
- Anna A. Ahimastos
- From Baker IDI Heart and Diabetes Institute and Department of Cardiovascular Medicine, Alfred Hospital, Melbourne, Australia (A.A.A., C.L., A.K.N., M.R., B.A.K.); Queensland Research Centre for Peripheral Vascular Disease, James Cook University, Townsville, Queensland, Australia (J.G.); and Department of Vascular and Endovascular Surgery, Townsville Hospital, Queensland, Australia (J.G.)
| | - Celine Latouche
- From Baker IDI Heart and Diabetes Institute and Department of Cardiovascular Medicine, Alfred Hospital, Melbourne, Australia (A.A.A., C.L., A.K.N., M.R., B.A.K.); Queensland Research Centre for Peripheral Vascular Disease, James Cook University, Townsville, Queensland, Australia (J.G.); and Department of Vascular and Endovascular Surgery, Townsville Hospital, Queensland, Australia (J.G.)
| | - Alaina K. Natoli
- From Baker IDI Heart and Diabetes Institute and Department of Cardiovascular Medicine, Alfred Hospital, Melbourne, Australia (A.A.A., C.L., A.K.N., M.R., B.A.K.); Queensland Research Centre for Peripheral Vascular Disease, James Cook University, Townsville, Queensland, Australia (J.G.); and Department of Vascular and Endovascular Surgery, Townsville Hospital, Queensland, Australia (J.G.)
| | - Medini Reddy-luthmoodoo
- From Baker IDI Heart and Diabetes Institute and Department of Cardiovascular Medicine, Alfred Hospital, Melbourne, Australia (A.A.A., C.L., A.K.N., M.R., B.A.K.); Queensland Research Centre for Peripheral Vascular Disease, James Cook University, Townsville, Queensland, Australia (J.G.); and Department of Vascular and Endovascular Surgery, Townsville Hospital, Queensland, Australia (J.G.)
| | - Jonathan Golledge
- From Baker IDI Heart and Diabetes Institute and Department of Cardiovascular Medicine, Alfred Hospital, Melbourne, Australia (A.A.A., C.L., A.K.N., M.R., B.A.K.); Queensland Research Centre for Peripheral Vascular Disease, James Cook University, Townsville, Queensland, Australia (J.G.); and Department of Vascular and Endovascular Surgery, Townsville Hospital, Queensland, Australia (J.G.)
| | - Bronwyn A. Kingwell
- From Baker IDI Heart and Diabetes Institute and Department of Cardiovascular Medicine, Alfred Hospital, Melbourne, Australia (A.A.A., C.L., A.K.N., M.R., B.A.K.); Queensland Research Centre for Peripheral Vascular Disease, James Cook University, Townsville, Queensland, Australia (J.G.); and Department of Vascular and Endovascular Surgery, Townsville Hospital, Queensland, Australia (J.G.)
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Pellegrin M, Bouzourène K, Poitry-Yamate C, Mlynarik V, Feihl F, Aubert JF, Gruetter R, Mazzolai L. Experimental peripheral arterial disease: new insights into muscle glucose uptake, macrophage, and T-cell polarization during early and late stages. Physiol Rep 2014; 2:e00234. [PMID: 24744903 PMCID: PMC3966252 DOI: 10.1002/phy2.234] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Accepted: 01/20/2014] [Indexed: 01/28/2023] Open
Abstract
Peripheral arterial disease (PAD) is a common disease with increasing prevalence, presenting with impaired walking ability affecting patient's quality of life. PAD epidemiology is known, however, mechanisms underlying functional muscle impairment remain unclear. Using a mouse PAD model, aim of this study was to assess muscle adaptive responses during early (1 week) and late (5 weeks) disease stages. Unilateral hindlimb ischemia was induced in ApoE−/− mice by iliac artery ligation. Ischemic limb perfusion and oxygenation (Laser Doppler imaging, transcutaneous oxygen pressure assessments) significantly decreased during early and late stage compared to pre‐ischemia, however, values were significantly higher during late versus early phase. Number of arterioles and arteriogenesis‐linked gene expression increased at later stage. Walking ability, evaluated by forced and voluntary walking tests, remained significantly decreased both at early and late phase without any significant improvement. Muscle glucose uptake ([18F]fluorodeoxyglucose positron emission tomography) significantly increased during early ischemia decreasing at later stage. Gene expression analysis showed significant shift in muscle M1/M2 macrophages and Th1/Th2 T cells balance toward pro‐inflammatory phenotype during early ischemia; later, inflammatory state returned to neutrality. Muscular M1/M2 shift inhibition by a statin prevented impaired walking ability in early ischemia. High‐energy phosphate metabolism remained unchanged (31‐Phosphorus magnetic resonance spectroscopy). Results show that rapid transient muscular inflammation contributes to impaired walking capacity while increased glucose uptake may be a compensatory mechanisms preserving immediate limb viability during early ischemia in a mouse PAD model. With time, increased ischemic limb perfusion and oxygenation assure muscle viability although not sufficiently to improve walking impairment. Subsequent decreased muscle glucose uptake may partly contribute to chronic walking impairment. Early inflammation inhibition and/or late muscle glucose impairment prevention are promising strategies for PAD management. e00234 Mechanisms responsible for functional muscle impairment in peripheral artery disease patients remain unknown. Our results show that both pro‐inflammatory T cells and macrophages are implicated in early peripheral ischemia whereas late ischemia is associated with impaired muscle glucose uptake in a mouse model of peripheral arterial disease (PAD).
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Affiliation(s)
- Maxime Pellegrin
- Division of Angiology, University Hospital of Lausanne, Lausanne, Switzerland
| | - Karima Bouzourène
- Division of Angiology, University Hospital of Lausanne, Lausanne, Switzerland
| | - Carole Poitry-Yamate
- Centre d'Imagerie Biomédicale, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Vladimir Mlynarik
- Centre d'Imagerie Biomédicale, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - François Feihl
- Division of Clinical Pathophysiology, University Hospital of Lausanne, Lausanne, Switzerland
| | | | - Rolf Gruetter
- Centre d'Imagerie Biomédicale, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Lucia Mazzolai
- Division of Angiology, University Hospital of Lausanne, Lausanne, Switzerland
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Poly-ADP-ribose-polymerase inhibition ameliorates hind limb ischemia reperfusion injury in a murine model of type 2 diabetes. Ann Surg 2014; 258:1087-95. [PMID: 23549425 DOI: 10.1097/sla.0b013e31828cced3] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
INTRODUCTION Diabetes is known to increase poly-ADP-ribose-polymerase (PARP) activity and posttranslational poly-ADP-ribosylation of several regulatory proteins involved in inflammation and energy metabolism. These experiments test the hypothesis that PARP inhibition will modulate hind limb ischemia reperfusion (IR) in a mouse model of type-II diabetes and ameliorate the ribosylation and the activity/transnuclear localization of the key glycolytic enzyme glyceraldehyde-3-phosphate dehydrogenase (GAPDH). METHODS db/db mice underwent 1.5 hours of hind limb ischemia followed by 1, 7, or 24 hours of reperfusion. The treatment group received the PARP inhibitor PJ34 (PJ34) over a 24-hour period; the untreated group received Lactated Ringer (LR) at the same time points. IR muscles were analyzed for indices of PARP activity, fiber injury, metabolic activity, inflammation, GAPDH activity/intracellular localization, and poly-ADP-ribosylation of GAPDH. RESULTS PARP activity was significantly lower in the PJ34-treated groups than in the Lactated Ringer group at 7 and 24 hours of reperfusion. There was significantly less muscle fiber injury in the PJ34-treated group than in the Lactated Ringer-treated mice at 24 hours of reperfusion. PJ34 lowered levels of select proinflammatory molecules at 7 hours and 24 hours of IR. There were significant increases in metabolic activity only at 24 hours of IR in the PJ34 group, which temporally correlated with increase in GAPDH activity, decreased GAPDH poly-ADP-ribosylation, and nuclear translocation of GAPDH. CONCLUSIONS PJ34 reduced PARP activity, GAPDH ribosylation, and GAPDH translocation; ameliorated muscle fiber injury; and increased metabolic activity after hind limb IR injury in a murine model of type-II diabetes. PARP inhibition might be a therapeutic strategy after IR in diabetic humans.
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Grenon SM, Chong K, Alley H, Nosova E, Gasper W, Hiramoto J, Boscardin WJ, Owens CD. Walking disability in patients with peripheral artery disease is associated with arterial endothelial function. J Vasc Surg 2014; 59:1025-34. [PMID: 24423479 DOI: 10.1016/j.jvs.2013.10.084] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Revised: 10/17/2013] [Accepted: 10/17/2013] [Indexed: 01/06/2023]
Abstract
OBJECTIVE Patients with peripheral artery disease (PAD) have varying degrees of walking disability that do not completely correlate with ankle-brachial index (ABI) or angiographic anatomy. We hypothesized that endothelial function (EF) is an independent predictor of symptom severity in PAD patients. METHODS This was a cross-sectional study of 100 PAD patients presenting to a vascular surgery clinic. All patients received ABI testing and brachial artery flow-mediated, endothelium-dependent vasodilation (FMD) to assess arterial EF. Symptom severity and walking disability reported by Rutherford category was based on the patient's self-report during the clinic visit and recorded by the investigator-vascular surgeons. Demographic, biochemical, and physiologic parameters were entered into regression equations to determine association with symptom severity. RESULTS Patients were a mean age of 66 ± 8 years, and 43% had diabetes. Mean FMD was 7.4%, indicating impaired EF. EF progressively declined as Rutherford category increased (P = .01). Brachial artery FMD, ABI, systolic blood pressure, C-reactive protein, low-density lipoprotein, high-density lipoprotein, β-blocker use, and a history of diabetes or coronary artery disease were all associated with Rutherford category (all P < .05). Multivariable regression showed EF (P < .02) and ABI (P < .0001) were independently associated with walking disability. When the cohort was restricted to claudicant patients (n = 73), EF remained associated with walking disability after adjustment for other covariates (P = .0001). CONCLUSIONS Symptom severity in PAD is multifactorial, reflecting impaired hemodynamics and vascular dysfunction. This is the first report demonstrating that walking disability in PAD is associated with arterial EF. The mechanistic link underlying these observations remains to be defined.
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Affiliation(s)
- S Marlene Grenon
- Department of Surgery, University of California San Francisco, San Francisco, Calif; Department of Surgery, Veterans Affairs Medical Center, San Francisco, Calif; VIPERx Laboratory, San Francisco, Calif.
| | - Karen Chong
- Department of Surgery, University of California San Francisco, San Francisco, Calif; VIPERx Laboratory, San Francisco, Calif
| | - Hugh Alley
- Department of Surgery, University of California San Francisco, San Francisco, Calif; VIPERx Laboratory, San Francisco, Calif
| | - Emily Nosova
- Department of Surgery, University of California San Francisco, San Francisco, Calif; VIPERx Laboratory, San Francisco, Calif
| | - Warren Gasper
- Department of Surgery, University of California San Francisco, San Francisco, Calif; Department of Surgery, Veterans Affairs Medical Center, San Francisco, Calif; VIPERx Laboratory, San Francisco, Calif
| | - Jade Hiramoto
- Department of Surgery, University of California San Francisco, San Francisco, Calif
| | - W John Boscardin
- Department of Biostatistics and Epidemiology, University of California San Francisco, San Francisco, Calif; Department of Medicine, University of California San Francisco, San Francisco, Calif
| | - Christopher D Owens
- Department of Surgery, University of California San Francisco, San Francisco, Calif; Department of Surgery, Veterans Affairs Medical Center, San Francisco, Calif; VIPERx Laboratory, San Francisco, Calif
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Althouse AD, Abbott JD, Forker AD, Bertolet M, Barinas-Mitchell E, Thurston RC, Mulukutla S, Aboyans V, Brooks MM. Risk factors for incident peripheral arterial disease in type 2 diabetes: results from the Bypass Angioplasty Revascularization Investigation in type 2 Diabetes (BARI 2D) Trial. Diabetes Care 2014; 37:1346-52. [PMID: 24595631 PMCID: PMC3994929 DOI: 10.2337/dc13-2303] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
OBJECTIVE The aim of this article was to define risk factors for incidence of peripheral arterial disease (PAD) in a large cohort of patients with type 2 diabetes mellitus (T2DM), overall and within the context of differing glycemic control strategies. RESEARCH DESIGN AND METHODS The Bypass Angioplasty Revascularization Investigation in Type 2 Diabetes (BARI 2D) randomized controlled trial assigned participants to insulin-sensitizing (IS) therapy versus insulin-providing (IP) therapy. A total of 1,479 participants with normal ankle-brachial index (ABI) at study entry were eligible for analysis. PAD outcomes included new ABI ≤0.9 with decrease at least 0.1 from baseline, lower extremity revascularization, or lower extremity amputation. Baseline risk factors within the overall cohort and time-varying risk factors within each assigned glycemic control arm were assessed using Cox proportional hazards models. RESULTS During an average 4.6 years of follow-up, 303 participants (20.5%) experienced an incident case of PAD. Age, sex, race, and baseline smoking status were all significantly associated with incident PAD in the BARI 2D cohort. Additional baseline risk factors included pulse pressure, HbA1c, and albumin-to-creatinine ratio (P < 0.05 for each). In stratified analyses of time-varying covariates, changes in BMI, LDL, HDL, systolic blood pressure, and pulse pressure were most predictive among IS patients, while change in HbA1c was most predictive among IP patients. CONCLUSIONS Among patients with T2DM, traditional cardiovascular risk factors were the main predictors of incident PAD cases. Stratified analyses showed different risk factors were predictive for patients treated with IS medications versus those treated with IP medications.
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Aboyans V, Criqui MH, Abraham P, Allison MA, Creager MA, Diehm C, Fowkes FGR, Hiatt WR, Jönsson B, Lacroix P, Marin B, McDermott MM, Norgren L, Pande RL, Preux PM, Stoffers HEJ, Treat-Jacobson D. Measurement and interpretation of the ankle-brachial index: a scientific statement from the American Heart Association. Circulation 2012; 126:2890-909. [PMID: 23159553 DOI: 10.1161/cir.0b013e318276fbcb] [Citation(s) in RCA: 1069] [Impact Index Per Article: 89.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Abstract
Peripheral arterial disease (PAD) is a common vascular disease that reduces blood flow capacity to the legs of patients. PAD leads to exercise intolerance that can progress in severity to greatly limit mobility, and in advanced cases leads to frank ischemia with pain at rest. It is estimated that 12 to 15 million people in the United States are diagnosed with PAD, with a much larger population that is undiagnosed. The presence of PAD predicts a 50% to 1500% increase in morbidity and mortality, depending on severity. Treatment of patients with PAD is limited to modification of cardiovascular disease risk factors, pharmacological intervention, surgery, and exercise therapy. Extended exercise programs that involve walking approximately five times per week, at a significant intensity that requires frequent rest periods, are most significant. Preclinical studies and virtually all clinical trials demonstrate the benefits of exercise therapy, including improved walking tolerance, modified inflammatory/hemostatic markers, enhanced vasoresponsiveness, adaptations within the limb (angiogenesis, arteriogenesis, and mitochondrial synthesis) that enhance oxygen delivery and metabolic responses, potentially delayed progression of the disease, enhanced quality of life indices, and extended longevity. A synthesis is provided as to how these adaptations can develop in the context of our current state of knowledge and events known to be orchestrated by exercise. The benefits are so compelling that exercise prescription should be an essential option presented to patients with PAD in the absence of contraindications. Obviously, selecting for a lifestyle pattern that includes enhanced physical activity prior to the advance of PAD limitations is the most desirable and beneficial.
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Affiliation(s)
- Tara L Haas
- Angiogenesis Research Group, Muscle Health Research Centre, Faculty of Health, York University, Toronto, Ontario, Canada
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McDermott MM, Liu K, Carroll TJ, Kibbe M, Ferrucci L, Guralnik JM, Morasch M, Pearce W, Carr J, Yuan C, Kramer CM, Tian L, Liao Y, Li D, Criqui MH. Plaque Characteristics in the Superficial Femoral Artery Correlate with Walking Impairment Questionnaire Scores in Peripheral Arterial Disease: The Walking and Leg Circulation Study (WALCS) III. JOURNAL OF SURGICAL RADIOLOGY 2012; 3:148-157. [PMID: 29188081 PMCID: PMC5703222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
PURPOSE We studied associations of magnetic resonance imaging (MRI)-measured plaque area and relative percent lumen reduction in the proximal superficial femoral artery with Walking Impairment Questionnaire (WIQ) scores and quality of life in people with lower extremity peripheral arterial disease (PAD). METHODS Four-hundred forty-two participants with PAD underwent cross-sectional imaging of the proximal superficial femoral artery with MRI, and completed the WIQ and the Short-Form-12 mental and physical functioning questionnaires. Questionnaires were scored on a 0-100 scale (100=best). Results adjust for age, sex, race, the ankle brachial index (ABI), comorbidities, and other covariates. RESULTS Adjusting for age, sex, race, ABI, comorbidities, and other covariates, higher mean plaque area was associated with poorer WIQ distance scores (1st quintile (least plaque)-44.8, 2nd quintile-43.3, 3rd quintile-38.9, 4th quintile-34.6, 5th quintile (greatest plaque)-30.6, p trend <0.001) and poorer WIQ speed scores (1st quintile-40.6, 2nd quintile-39.6, 3rd quintile-39.5, 4th quintile-32.8, 5th quintile-33.0, p trend =0.019). Similar associations of higher maximum plaque area, mean lumen reduction, and maximum lumen reduction with poorer WIQ distance and speed scores were observed. Plaque measures were not associated with WIQ stair climbing scores or SF-12 scores. CONCLUSION Among participants with PAD, greater plaque burden and smaller lumen area in the proximal superficial femoral artery are associated with poorer walking endurance and slower walking speed as measured by the WIQ, even after adjusting for the ABI.
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Affiliation(s)
- Mary M. McDermott
- Department of Medicine, Northwestern University’s Feinberg School of Medicine
- Department of Preventive Medicine, Northwestern University’s Feinberg School of Medicine
| | - Kiang Liu
- Department of Preventive Medicine, Northwestern University’s Feinberg School of Medicine
| | - Timothy J. Carroll
- Department of Radiology, Northwestern University’s Feinberg School of Medicine
- Department of Biomedical Engineering and Radiology, Northwestern University
| | - Melina Kibbe
- Department of Surgery, Northwestern University
- Division of Vascular Surgery, Jesse Brown VA Medical Center
| | - Luigi Ferrucci
- Longitudinal Studies Section, Clinical Research Branch, National Institute on Aging
| | - Jack M. Guralnik
- Department of Epidemiology and Public Health, University of Maryland School of Medicine
| | | | | | - James Carr
- Department of Radiology, Northwestern University’s Feinberg School of Medicine
| | - Chun Yuan
- Department of Radiology, Electrical Engineering, and Bioengineering, University of Washington, Seattle
- Department of Radiology, University of Washington School of Medicine
| | | | - Lu Tian
- Department of Health Research and Policy, Stanford University School of Medicine
| | - Yihua Liao
- Department of Preventive Medicine, Northwestern University’s Feinberg School of Medicine
| | | | - Michael H. Criqui
- Department of Family and Preventive Medicine, University of California at San Diego
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Huang CL, Wu YW, Hwang CL, Jong YS, Chao CL, Chen WJ, Wu YT, Yang WS. The application of infrared thermography in evaluation of patients at high risk for lower extremity peripheral arterial disease. J Vasc Surg 2011; 54:1074-80. [PMID: 21784604 DOI: 10.1016/j.jvs.2011.03.287] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2011] [Revised: 03/31/2011] [Accepted: 03/31/2011] [Indexed: 10/18/2022]
Abstract
OBJECTIVE We investigated the usefulness of infrared thermography in evaluating patients at high risk for lower extremity peripheral arterial disease (PAD), including severity, functional capacity, and quality of life. METHODS A total of 51 patients (23 males; age 70 ± 9.8 years) were recruited. They completed three PAD-associated questionnaires, including walking impairment, vascular quality of life, and 7-day physical activity recall questionnaires before a 6-minute walking test (6MWT). Ankle-brachial index (ABI) and segmental pressure were analyzed for PAD diagnosis and stenotic level assessment. The cutaneous temperature at shin and sole were recorded by infrared thermography before and after the walk test. Detailed demographic information and medication list were obtained. RESULTS Twenty-eight subjects had abnormal ABI (ABI <1), while PAD was diagnosed in 20. No subjects had non-compressible artery (ABI >1.3). Demographic profiles and clinical parameters in PAD and non-PAD patients were similar, except for age, smoking history, and hyperlipidemia. PAD patients walked shorter distances (356 ± 102 m vs 218 ± 92 m; P < .001). Claudication occurred in 14 patients, while seven failed in completing the 6MWT. The rest temperatures were similar in PAD and non-PAD patients. However, the post-exercise temperature dropped in the lower extremities with arterial stenosis, but was maintained or elevated slightly in the extremities with patent arteries (temperature changes at sole in PAD vs non-PAD patients: -1.25 vs -0.15°C; P < .001). The exercise-induced temperature changes at the sole were not only positively correlated with the 6MWD (Spearman correlation coefficient = 0.31, P = .03), but was also correlated with ABI (Spearman correlation coefficient = 0.48, P < .001) and 7-day physical activity recall scores (Spearman correlation coefficient = 0.30, P = .033). CONCLUSION By detecting cutaneous temperature changes in the lower extremities, infrared thermography offers another non-invasive, contrast-free option in PAD evaluation and functional assessment.
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Affiliation(s)
- Chi-Lun Huang
- Department of Internal Medicine, Taoyuan General Hospital, Taoyuan, Taiwan
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Hamburg NM, Balady GJ. Exercise rehabilitation in peripheral artery disease: functional impact and mechanisms of benefits. Circulation 2011; 123:87-97. [PMID: 21200015 DOI: 10.1161/circulationaha.109.881888] [Citation(s) in RCA: 175] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Naomi M Hamburg
- Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston Medical Center, Boston, MA 02118, USA
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McDermott MM, Ferrucci L, Guralnik JM, Dyer AR, Liu K, Pearce WH, Clark E, Liao Y, Criqui MH. The ankle-brachial index is associated with the magnitude of impaired walking endurance among men and women with peripheral arterial disease. Vasc Med 2010; 15:251-7. [PMID: 20511294 DOI: 10.1177/1358863x10365181] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Previous reports suggest that the severity of peripheral arterial disease (PAD), measured by the ankle-brachial index (ABI), is not associated with the magnitude of walking impairment, measured by treadmill testing. These prior studies have had small sample sizes and included only PAD participants with symptoms of intermittent claudication. We studied the association of the ABI with diverse measures of walking performance in a cross-sectional study of 156 participants with PAD with and without intermittent claudication symptoms. Outcomes included the Gardner-Skinner treadmill test, 6-minute walk, 4-meter walking velocity at usual and fastest pace, and the walking impairment questionnaire (WIQ). Adjusting for age, sex, race, comorbidities, leg symptoms, and other confounders, lower ABI values were associated with shorter distance achieved in the 6-minute walk (ABI < 0.50: 286 meters; ABI 0.50-0.70: 316 meters; ABI 0.71-0.95: 355 meters, p trend < 0.001), shorter maximal treadmill walking time (ABI < 0.50: 6.0 minutes; ABI 0.50-0.70: 6.9 minutes; ABI 0.71-0.95: 8.3 minutes, p trend = 0.009), and lower WIQ distance scores (p trend = 0.007) among PAD participants. The ABI was not associated significantly with walking velocity over 4 meters, treadmill time to onset of leg symptoms, or the WIQ speed or stair-climbing scores. In conclusion, among 156 participants with PAD with and without intermittent claudication, lower ABI values are associated significantly with poorer walking endurance, assessed by three distinct measures. Clinical Trial Registration - URL: http://www.clinicaltrials.gov. Unique identifier: NCT00106327.
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Affiliation(s)
- Mary M McDermott
- Northwestern University, Feinberg School of Medicine, Chicago, IL, USA.
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Does endothelial dysfunction contribute to the clinical status of patients with peripheral arterial disease? Can J Cardiol 2010; 26 Suppl A:45A-50A. [PMID: 20386761 DOI: 10.1016/s0828-282x(10)71062-x] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Peripheral arterial disease leads to lower extremity ischemia and limb loss, and is linked to cardiovascular events. The anatomical extent of lower extremity atherosclerosis fails to fully explain ischemic symptoms or predict the development of critical limb ischemia. Endothelial dysfunction is known to contributed to the pathogenesis and clinical expression of coronary artery disease, but the importance of endothelial dysfunction in peripheral arterial disease remains incompletely understood. Endothelial dysfunction could contribute to lower extremity ischemia by impairing blood flow responses to ischemia, collateral formation and arterial remodelling, and by promoting vasospasm, thrombosis, plaque rupture and lesion progression. There is a need for additional studies examining the contribution of endothelial dysfunction to the pathogenesis of peripheral arterial disease, and the potential role of endothelial dysfunction as a surrogate marker with utility in the management of patients.
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Burgos MI, Fenollar M, Avilés F, Parra MS. Patrón diferencial de homocisteína en pacientes con enfermedad arterial periférica. Med Clin (Barc) 2010; 134:467-8. [DOI: 10.1016/j.medcli.2009.02.022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2008] [Accepted: 02/24/2009] [Indexed: 11/16/2022]
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Abstract
While virtually absent in our diet a few hundred years ago, fructose has now become a major constituent of our modern diet. Our main sources of fructose are sucrose from beet or cane, high fructose corn syrup, fruits, and honey. Fructose has the same chemical formula as glucose (C(6)H(12)O(6)), but its metabolism differs markedly from that of glucose due to its almost complete hepatic extraction and rapid hepatic conversion into glucose, glycogen, lactate, and fat. Fructose was initially thought to be advisable for patients with diabetes due to its low glycemic index. However, chronically high consumption of fructose in rodents leads to hepatic and extrahepatic insulin resistance, obesity, type 2 diabetes mellitus, and high blood pressure. The evidence is less compelling in humans, but high fructose intake has indeed been shown to cause dyslipidemia and to impair hepatic insulin sensitivity. Hepatic de novo lipogenesis and lipotoxicity, oxidative stress, and hyperuricemia have all been proposed as mechanisms responsible for these adverse metabolic effects of fructose. Although there is compelling evidence that very high fructose intake can have deleterious metabolic effects in humans as in rodents, the role of fructose in the development of the current epidemic of metabolic disorders remains controversial. Epidemiological studies show growing evidence that consumption of sweetened beverages (containing either sucrose or a mixture of glucose and fructose) is associated with a high energy intake, increased body weight, and the occurrence of metabolic and cardiovascular disorders. There is, however, no unequivocal evidence that fructose intake at moderate doses is directly related with adverse metabolic effects. There has also been much concern that consumption of free fructose, as provided in high fructose corn syrup, may cause more adverse effects than consumption of fructose consumed with sucrose. There is, however, no direct evidence for more serious metabolic consequences of high fructose corn syrup versus sucrose consumption.
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Affiliation(s)
- Luc Tappy
- Department of Physiology, Faculty of Biology and Medicine, University of Lausanne, CH-1005 Lausanne, Switzerland.
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The role of biomarkers and genetics in peripheral arterial disease. J Am Coll Cardiol 2009; 54:1228-37. [PMID: 19778662 DOI: 10.1016/j.jacc.2009.04.081] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2008] [Revised: 03/16/2009] [Accepted: 04/21/2009] [Indexed: 01/21/2023]
Abstract
Men and women with lower extremity peripheral arterial disease (PAD) have higher levels of inflammatory biomarkers than those without PAD. Observational studies link higher levels of several inflammatory biomarkers, including C-reactive protein (CRP), interleukin-6, tumor necrosis factor-alpha, and soluble adhesion molecules, to 1 or more of the following outcomes in people with PAD: more severe PAD, greater lower extremity functional impairment, more adverse calf skeletal muscle characteristics, greater declines in the ankle brachial index, greater declines in lower extremity performance, and higher rates of cardiovascular morbidity and mortality. Higher levels of inflammatory biomarkers are also associated with poorer outcomes after lower extremity revascularization, including graft restenosis and mortality. Increasing levels of CRP are associated with increased mortality and faster functional decline among people with PAD. Statin therapies reduce cardiovascular event rates and may improve walking performance in men and women with PAD, perhaps in part because statins can reduce inflammation. However, no clinical trials have been performed to establish whether therapies that specifically block or lower inflammatory biomarkers improve outcomes in patients with PAD. Family studies show that heritability of PAD ranges from approximately 20% to 45% after adjusting for atherosclerotic risk factors. A genetic marker for PAD has the potential to identify individuals at increased risk for PAD and may also uncover proteins that can help determine mechanisms of development of lower extremity atherosclerosis. However, a genetic marker for PAD has not been identified.
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