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Haley MJ, Krishnan S, Burrows D, de Hoog L, Thakrar J, Schiessl I, Allan SM, Lawrence CB. Acute high-fat feeding leads to disruptions in glucose homeostasis and worsens stroke outcome. J Cereb Blood Flow Metab 2019; 39:1026-1037. [PMID: 29171775 PMCID: PMC6545621 DOI: 10.1177/0271678x17744718] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Chronic consumption of diets high in fat leads to obesity and can negatively affect brain function. Rodents made obese by long-term maintenance on a high-fat diet have worse outcome after experimental stroke. High-fat consumption for only three days does not induce obesity but has rapid effects on the brain including memory impairment. However, the effect of brief periods of high-fat feeding or high-fat consumption in the absence of obesity on stroke is unknown. We therefore tested the effect of an acute period of high-fat feeding (three days) in C57B/6 mice on outcome after middle cerebral artery occlusion (MCAo). In contrast to a chronic high-fat diet (7.5 months), an acute high-fat diet had no effect on body weight, adipose tissue, lipid profile or inflammatory markers (in periphery and the brain). Three days of high-fat feeding impaired glucose tolerance, increased plasma glucose and insulin and brain expression of the glucose transporter GLUT-1. Ischaemic damage was increased (48%) in mice fed an acute high-fat diet, and was associated with a further reduction in GLUT-1 in the ischaemic hemisphere. These data demonstrate that only a brief period of high-fat consumption has a negative effect on glucose homeostasis and worsens outcome after ischaemic stroke.
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Affiliation(s)
- Michael J Haley
- Faculty of Biology, Medicine and Health, The University of Manchester, Oxford Road, Manchester, UK
| | - Siddharth Krishnan
- Faculty of Biology, Medicine and Health, The University of Manchester, Oxford Road, Manchester, UK
| | - David Burrows
- Faculty of Biology, Medicine and Health, The University of Manchester, Oxford Road, Manchester, UK
| | - Leon de Hoog
- Faculty of Biology, Medicine and Health, The University of Manchester, Oxford Road, Manchester, UK
| | - Jamie Thakrar
- Faculty of Biology, Medicine and Health, The University of Manchester, Oxford Road, Manchester, UK
| | - Ingo Schiessl
- Faculty of Biology, Medicine and Health, The University of Manchester, Oxford Road, Manchester, UK
| | - Stuart M Allan
- Faculty of Biology, Medicine and Health, The University of Manchester, Oxford Road, Manchester, UK
| | - Catherine B Lawrence
- Faculty of Biology, Medicine and Health, The University of Manchester, Oxford Road, Manchester, UK
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George J, Hu A, Patel K, Thakrar J, Al-Mukhtar A. Improving antibiotic compliance: The five-audit junior-led experience. Int J Surg 2018. [DOI: 10.1016/j.ijsu.2018.05.183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Hu J, Jara F, Thakrar J, Shih K. Quantitative cleaning efficacy evaluation methods with protein and lipid lens soiling models. CLAO J 1995; 21:154-5. [PMID: 7586472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
We developed a nondestructive, quantitative method for evaluating the cleaning efficacy of rigid gas permeable contact lens care systems. Simulated tears prepared with lysozyme, albumin, and calcium ions were applied to rigid gas permeable lenses as a protein soiling model, and a mixture of grease and unsaturated fat was applied as a lipid soiling model. The ComfortCare system (Pilkington Barnes Hind) and the Boston Cleaner and Boston Conditioning Solution (Polymer Technology) were evaluated for their efficacy in removing protein deposits; water was used as a control. The ComfortCare system and the Boston Advance Cleaner and Boston Advance Conditioning Solution were evaluated for their effectiveness in removing lipid deposits; saline was used as a control. Protein deposit level was detected by a densitometer at the absorbance of 280 nm. The lipid deposit level was evaluated by the absorbance of the fluorescence at 430 nm using the same densitometer with a fluorescence accessory. The two test systems demonstrated a significantly higher cleaning efficacy than the control for both soiling models. The methods provide quantitative measurements and therefore can be analyzed statistically for screening or comparison purposes.
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Affiliation(s)
- J Hu
- Pilkington Barnes Hind, Sunnyvale, CA 94086, USA
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