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Pagliassotti MJ, Estrada AL, Hudson WM, Wei Y, Wang D, Seals DR, Zigler ML, LaRocca TJ. Trehalose supplementation reduces hepatic endoplasmic reticulum stress and inflammatory signaling in old mice. J Nutr Biochem 2017; 45:15-23. [PMID: 28431320 DOI: 10.1016/j.jnutbio.2017.02.022] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 01/12/2017] [Accepted: 02/17/2017] [Indexed: 10/19/2022]
Abstract
The accumulation of damaged proteins can perturb cellular homeostasis and provoke aging and cellular damage. Quality control systems, such as the unfolded protein response (UPR), inflammatory signaling and protein degradation, mitigate the residence time of damaged proteins. In the present study, we have examined the UPR and inflammatory signaling in the liver of young (~6 months) and old (~28 months) mice (n=8/group), and the ability of trehalose, a compound linked to increased protein stability and autophagy, to counteract age-induced effects on these systems. When used, trehalose was provided for 4 weeks in the drinking water immediately prior to sacrifice (n=7/group). Livers from old mice were characterized by activation of the UPR, increased inflammatory signaling and indices of liver injury. Trehalose treatment reduced the activation of the UPR and inflammatory signaling, and reduced liver injury. Reductions in proteins involved in autophagy and proteasome activity observed in old mice were restored following trehalose treatment. The autophagy marker, LC3B-II, was increased in old mice treated with trehalose. Metabolomics analyses demonstrated that reductions in hexosamine biosynthetic pathway metabolites and nicotinamide in old mice were restored following trehalose treatment. Trehalose appears to be an effective intervention to reduce age-associated liver injury and mitigate the need for activation of quality control systems that respond to disruption of proteostasis.
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Affiliation(s)
- Michael J Pagliassotti
- Department of Food Science and Human Nutrition, Colorado State University, Fort Collins, CO 80523-1571, USA.
| | - Andrea L Estrada
- Department of Food Science and Human Nutrition, Colorado State University, Fort Collins, CO 80523-1571, USA
| | - William M Hudson
- Department of Food Science and Human Nutrition, Colorado State University, Fort Collins, CO 80523-1571, USA
| | - Yuren Wei
- Department of Food Science and Human Nutrition, Colorado State University, Fort Collins, CO 80523-1571, USA
| | - Dong Wang
- Department of Food Science and Human Nutrition, Colorado State University, Fort Collins, CO 80523-1571, USA
| | - Douglas R Seals
- Department of Integrative Physiology, University of Colorado, Boulder, CO 80309, USA
| | - Melanie L Zigler
- Department of Integrative Physiology, University of Colorado, Boulder, CO 80309, USA
| | - Thomas J LaRocca
- Department of Integrative Physiology, University of Colorado, Boulder, CO 80309, USA
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Lesniewski LA, Zigler ML, Durrant JR, Nowlan MJ, Folian BJ, Donato AJ, Seals DR. Aging compounds western diet-associated large artery endothelial dysfunction in mice: prevention by voluntary aerobic exercise. Exp Gerontol 2013; 48:1218-25. [PMID: 23954368 DOI: 10.1016/j.exger.2013.08.001] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2013] [Revised: 07/25/2013] [Accepted: 08/06/2013] [Indexed: 10/26/2022]
Abstract
We tested the hypothesis that aging will exacerbate the negative vascular consequences of exposure to a common physiological stressor, i.e., consumption of a "western" (high fat/high sucrose) diet (WD), by inducing superoxide-associated reductions in nitric oxide (NO) bioavailability, and that this would be prevented by voluntary aerobic exercise. Incremental stiffness and endothelium-dependent dilation (EDD) were measured in the carotid arteries of young (5.4±0.3 mo, N=20) and old (30.4±0.2 mo, N=19) male B6D2F1 mice fed normal chow (NC: 17% fat, 0% sucrose) or a western diet (40% fat, 19% sucrose) and housed in either standard cages or cages equipped with running wheels for 10-14 weeks. Incremental stiffness was higher in old NC (P<0.05) and both young (P<0.01) and old (P<0.01) WD fed mice compared with young NC mice, but WD did not further increase stiffness in the old mice. In cage control mice, maximal EDD was 17% lower in both NC fed old mice and young WD fed mice (P<0.05). Consumption of WD by old mice led to a further 20% reduction in maximal EDD (P<0.05). Incremental stiffness was 28% lower and maximal EDD was 38% greater in old WD fed mice with access to running wheels vs. old WD fed control mice (P<0.05) and not different from young NC fed controls. Wheel running also tended to improve maximal EDD (+9%, P=0.11), but not incremental stiffness in young WD fed mice. Ex vivo treatment with the superoxide scavenger TEMPOL and NO inhibitor l-NAME abolished these respective effects of age, WD and voluntary running on EDD. Ingestion of a WD induces similar degrees of endothelial dysfunction in old and young adult B6D2F1 mice, and these effects are mediated by a superoxide-dependent impairment of NO bioavailability. However, the combination of old age and WD, a common occurrence in our aging society, results in a marked, additive reduction in endothelial function. Importantly, regular voluntary aerobic exercise reduces arterial stiffness and protects against the adverse influence of WD on endothelial function in old animals by preventing superoxide suppression of NO. These findings may have important implications for arterial aging and the prevention of age-associated cardiovascular diseases.
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Affiliation(s)
- Lisa A Lesniewski
- Department of Integrative Physiology, University of Colorado Boulder, 354 UCB, Boulder, CO 80309, United States; School of Medicine, Department of Internal Medicine, Division of Geriatrics, University of Utah, United States; Geriatrics Research Education and Clinical Center, Veterans Administration Medical Center, Salt Lake City Health Care System, 500 Foothill Dr., Salt Lake City, UT 84148, United States.
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Fleenor BS, Sindler AL, Marvi NK, Howell KL, Zigler ML, Yoshizawa M, Seals DR. Curcumin ameliorates arterial dysfunction and oxidative stress with aging. Exp Gerontol 2012; 48:269-76. [PMID: 23142245 DOI: 10.1016/j.exger.2012.10.008] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2012] [Revised: 10/04/2012] [Accepted: 10/30/2012] [Indexed: 01/08/2023]
Abstract
We tested the hypothesis that curcumin supplementation would reverse arterial dysfunction and vascular oxidative stress with aging. Young (Y, 4-6 months) and old (O, 26-28 months) male C57BL6/N mice were given normal or curcumin supplemented (0.2%) chow for 4 weeks (n=5-10/group/measure). Large elastic artery stiffness, assessed by aortic pulse wave velocity (aPWV), was greater in O (448±15 vs. 349±15 cm/s) and associated with greater collagen I and advanced glycation end-products and less elastin (all P<0.05). In O, curcumin restored aPWV (386±15 cm/s), collagen I and AGEs (AGEs) to levels not different vs. Y. Ex vivo carotid artery acetylcholine (ACh)-induced endothelial-dependent dilation (EDD, 79±3 vs. 94±2%), nitric oxide (NO) bioavailability and protein expression of endothelial NO synthase (eNOS) were lower in O (all P<0.05). In O, curcumin restored NO-mediated EDD (92±2%) to levels of Y. Acute ex vivo administration of the superoxide dismutase (SOD) mimetic TEMPOL normalized EDD in O control mice (93±3%), but had no effect in Y control or O curcumin treated animals. O had greater arterial nitrotyrosine abundance, superoxide production and NADPH oxidase p67 subunit expression, and lower manganese SOD (all P<0.05), all of which were reversed with curcumin. Curcumin had no effects on Y. Curcumin supplementation ameliorates age-associated large elastic artery stiffening, NO-mediated vascular endothelial dysfunction, oxidative stress and increases in collagen and AGEs in mice. Curcumin may be a novel therapy for treating arterial aging in humans.
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Affiliation(s)
- Bradley S Fleenor
- Department of Integrative Physiology, University of Colorado, Boulder, CO 80309, USA.
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Yoshizawa M, Seals DR, Zigler ML, Ahsan S, Sindler AL. Role of superoxide in cerebrovascular endothelial dysfunction with aging. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.lb652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | | | - Sanjana Ahsan
- Integrative PhysiologyUniversity of ColoradoBoulderCO
| | - Amy L Sindler
- Integrative PhysiologyUniversity of ColoradoBoulderCO
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Abstract
To test the hypothesis that the antioxidant enzyme superoxide dismutase (SOD) mimetic TEMPOL improves arterial aging, young (Y, 4-6 months) and old (O, 26-28 months) male C57BL6 mice received regular or TEMPOL-supplemented (1mM) drinking water for 3 weeks (n = 8 per group). Aortic superoxide was 65% greater in O (P < 0.05 vs. Y), which was normalized by TEMPOL. O had large elastic artery stiffening, as indicated by greater aortic pulse wave velocity (aPWV, 508 ± 22 vs. 418 ± 22 AU), which was associated with increased adventitial collagen I expression (P < 0.05 vs. Y). TEMPOL reversed the age-associated increases in aPWV (434 ± 21 AU) and collagen in vivo, and SOD reversed the increases in collagen I in adventitial fibroblasts from older rats in vitro. Isolated carotid arteries of O had impaired endothelial function as indicated by reduced acetylcholine-stimulated endothelium-dependent dilation (EDD) (75.6 ± 3.2 vs. 94.5 ± 2.0%) mediated by reduced nitric oxide (NO) bioavailability (L-NAME) associated with decreased endothelial NO synthase (eNOS) expression (P < 0.05 vs. Y). TEMPOL restored EDD (94.5 ± 1.4%), NO bioavailability and eNOS in O. Nitrotyrosine and expression of NADPH oxidase were ~100-200% greater, and MnSOD was ~75% lower in O (P < 0.05 vs. Y). TEMPOL normalized nitrotyrosine and NADPH oxidase in O, without affecting MnSOD. Aortic pro-inflammatory cytokines were greater in O (P < 0.05 vs. Y) and normalized by TEMPOL. Short-term treatment of excessive superoxide with TEMPOL ameliorates large elastic artery stiffening and endothelial dysfunction with aging, and this is associated with normalization of arterial collagen I, eNOS, oxidative stress, and inflammation.
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Affiliation(s)
- Bradley S Fleenor
- Department of Integrative Physiology, University of Colorado, Boulder, CO 80309, USA.
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Sindler AL, Fleenor BS, Calvert JW, Marshall KD, Zigler ML, Lefer DJ, Seals DR. Nitrite supplementation reverses vascular endothelial dysfunction and large elastic artery stiffness with aging. Aging Cell 2011; 10:429-37. [PMID: 21276184 PMCID: PMC3094511 DOI: 10.1111/j.1474-9726.2011.00679.x] [Citation(s) in RCA: 173] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
We tested the hypothesis that short-term nitrite therapy reverses vascular endothelial dysfunction and large elastic artery stiffening with aging, and reduces arterial oxidative stress and inflammation. Nitrite concentrations were lower (P < 0.05) in arteries, heart, and plasma of old (26-28 month) male C57BL6 control mice, and 3 weeks of sodium nitrite (50 mg L(-1) in drinking water) restored nitrite levels to or above young (4-6 month) controls. Isolated carotid arteries of old control mice had lower acetylcholine (ACh)-induced endothelium-dependent dilation (EDD) (71.7 ± 6.1% vs. 93.0 ± 2.0%) mediated by reduced nitric oxide (NO) bioavailability (P < 0.05 vs. young), and sodium nitrite restored EDD (95.5 ± 1.6%) by increasing NO bioavailability. 4-Hydroxy-2,2,6,6-tetramethylpiperidine 1-oxyl (TEMPOL), a superoxide dismutase (SOD) mimetic, apocynin, a nicotinamide adenine dinucleotide phosphate-oxidase (NADPH) inhibitor, and sepiapterin (exogenous tetrahydrobiopterin) each restored EDD to ACh in old control, but had no effect in old nitrite-supplemented mice. Old control mice had increased aortic pulse wave velocity (478 ± 16 vs. 332 ± 12 AU, P < 0.05 vs. young), which nitrite supplementation lowered (384 ± 27 AU). Nitrotyrosine, superoxide production, and expression of NADPH oxidase were ∼100-300% greater and SOD activity was ∼50% lower in old control mice (all P < 0.05 vs. young), but were ameliorated by sodium nitrite treatment. Inflammatory cytokines were markedly increased in old control mice (P < 0.05), but reduced to levels of young controls with nitrite supplementation. Short-term nitrite therapy reverses age-associated vascular endothelial dysfunction, large elastic artery stiffness, oxidative stress, and inflammation. Sodium nitrite may be a novel therapy for treating arterial aging in humans.
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Affiliation(s)
- Amy L Sindler
- Department of Integrative Physiology, University of Colorado, Boulder, USA.
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Howell KL, Fleenor BS, Zigler ML, Yoshizawa M, Marziaz ML, Seals DR, Sindler AL. Curcumin improves large elastic artery stiffness and reverses superoxide suppression of nitric oxide‐mediated vascular endothelial function in old mice. FASEB J 2011. [DOI: 10.1096/fasebj.25.1_supplement.lb453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Kate L Howell
- Integrative PhysiologyUniversity of ColoradoBoulderCO
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Russell M, Donato AJ, Zigler ML, Lesniewski LA, Seals DR. Voluntary running and caloric restriction reverse cerebrovascular endothelial dysfunction in old mice by restoring nitric oxide bioavailability. FASEB J 2011. [DOI: 10.1096/fasebj.25.1_supplement.1108.16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Molly Russell
- Integrative PhysiologyUniversity of ColoradoBoulderCO
| | - Anthony J. Donato
- Integrative PhysiologyUniversity of ColoradoBoulderCO
- Devision of Geriatrics, Internal MedicineUniversity of UtahSalt Lake CityUT
| | | | - Lisa A. Lesniewski
- Integrative PhysiologyUniversity of ColoradoBoulderCO
- Devision of Geriatrics, Internal MedicineUniversity of UtahSalt Lake CityUT
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Sindler AL, Calvert JW, Fleenor BS, Zigler ML, Lefer DJ, Seals DR. Nitrite supplementation reverses vascular endothelial dysfunction in old mice via improved nitric oxide bioavailability. FASEB J 2010. [DOI: 10.1096/fasebj.24.1_supplement.1039.6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Amy L Sindler
- Integrative PhysiologyUniversity of ColoradoBoulderCO
| | - John W Calvert
- Cardiothoracic SurgeryEmory University School of MedicineAtlantaGA
| | | | | | - David J Lefer
- Cardiothoracic SurgeryEmory University School of MedicineAtlantaGA
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Lawson BR, Seals DR, Magerko KA, Durrant JR, Zigler ML, Donato AJ, Lesniewski LA. Short‐term AMPK activation improves vascular endothelial function in old mice by a different mechanism than habitual aerobic exercise. FASEB J 2010. [DOI: 10.1096/fasebj.24.1_supplement.619.9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Brooke R Lawson
- Integrative PhysiologyUniversity of Colorado at BoulderBoulderCO
| | - Douglas R Seals
- Integrative PhysiologyUniversity of Colorado at BoulderBoulderCO
| | | | | | - Melanie L Zigler
- Integrative PhysiologyUniversity of Colorado at BoulderBoulderCO
| | - Anthony J Donato
- Integrative PhysiologyUniversity of Colorado at BoulderBoulderCO
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