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Liu J, Gao W, Pu L, Wei J, Xin Z, Wang Y, Shi T, Guo C. Modulation of hepatic gene expression profiles by vitamin B 1, vitamin B 2, and niacin supplementation in mice exposed to acute hypoxia. Appl Physiol Nutr Metab 2018; 43:844-853. [PMID: 29566343 DOI: 10.1139/apnm-2017-0468] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This study was aimed to observe the effects of vitamin B1, vitamin B2, and niacin supplementation on hepatic gene expression profiles in mice exposed to acute hypoxia. Thirty mice were randomly divided into normal, acute hypoxia, and acute hypoxia plus vitamin B1, vitamin B2, and niacin supplementation groups and fed corresponding diets for 2 weeks and then exposed to a simulated altitude of 6000 m for 8 h. Hepatic gene expression profiles were analyzed using a microarray technique. Several biochemical markers were also assayed. The results showed that a total of 2476 genes were expressed differentially after acute hypoxia exposure (1508 upregulated genes and 968 downregulated genes). Compared with the acute hypoxia group, there were 1382 genes differentially expressed (626 upregulated genes and 756 downregulated genes) in the acute hypoxia plus vitamin B1, vitamin B2, and niacin supplementation group. Pathway analysis indicated that carbohydrate, lipid, and amino acid metabolism, as well as electron transfer chain, were improved to some extent after vitamin B1, vitamin B2, and niacin supplementation. Supportive results were obtained from biochemical assays. Our findings suggest that the supplementation of vitamin B1, vitamin B2, and niacin is beneficial in improving nutritional metabolism partly via gene expression under acute hypoxia condition.
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Affiliation(s)
- Jin Liu
- Department of Nutrition, Tianjin Institute of Health and Environmental Medicine, Tianjin, 300050, China.,Department of Nutrition, Tianjin Institute of Health and Environmental Medicine, Tianjin, 300050, China
| | - Weina Gao
- Department of Nutrition, Tianjin Institute of Health and Environmental Medicine, Tianjin, 300050, China.,Department of Nutrition, Tianjin Institute of Health and Environmental Medicine, Tianjin, 300050, China
| | - Lingling Pu
- Department of Nutrition, Tianjin Institute of Health and Environmental Medicine, Tianjin, 300050, China.,Department of Nutrition, Tianjin Institute of Health and Environmental Medicine, Tianjin, 300050, China
| | - Jingyu Wei
- Department of Nutrition, Tianjin Institute of Health and Environmental Medicine, Tianjin, 300050, China.,Department of Nutrition, Tianjin Institute of Health and Environmental Medicine, Tianjin, 300050, China
| | - Zhonghao Xin
- Department of Nutrition, Tianjin Institute of Health and Environmental Medicine, Tianjin, 300050, China.,Department of Nutrition, Tianjin Institute of Health and Environmental Medicine, Tianjin, 300050, China
| | - Yawen Wang
- Department of Nutrition, Tianjin Institute of Health and Environmental Medicine, Tianjin, 300050, China.,Department of Nutrition, Tianjin Institute of Health and Environmental Medicine, Tianjin, 300050, China
| | - Tala Shi
- Department of Nutrition, Tianjin Institute of Health and Environmental Medicine, Tianjin, 300050, China.,Department of Nutrition, Tianjin Institute of Health and Environmental Medicine, Tianjin, 300050, China
| | - Changjiang Guo
- Department of Nutrition, Tianjin Institute of Health and Environmental Medicine, Tianjin, 300050, China.,Department of Nutrition, Tianjin Institute of Health and Environmental Medicine, Tianjin, 300050, China
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Alim U, Bates D, Langevin A, Werry D, Dersch-Mills D, Herman RJ, Mintz M, Ghosh S. Thiamine Prescribing Practices for Adult Patients Admitted to an Internal Medicine Service. Can J Hosp Pharm 2017; 70:179-187. [PMID: 28680171 DOI: 10.4212/cjhp.v70i3.1657] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
BACKGROUND Thiamine (vitamin B1) is an essential cofactor responsible for the breakdown of glucose, and its deficiency is associated with Wernicke encephalopathy (WE). There is a lack of evidence from systematic studies on the optimal dosing of thiamine for WE. Objectives: The primary objective was to describe the prescribing patterns for IV thiamine in adult patients admitted to a large teaching hospital. The secondary objective was to evaluate the clinical resolution of WE symptoms (confusion, ataxia, and/or ocular motor abnormalities) in relation to the dose of IV thiamine prescribed. METHODS A retrospective design was used to review data for adult patients admitted to an internal medicine service from June 1, 2014, to June 30, 2015. All patients included in the study received IV thiamine: low-dose therapy was defined as 100 mg IV daily and high-dose therapy was defined as dosage greater than 100 mg IV daily. RESULTS A total of 141 patients were included; low-dose thiamine was prescribed for 115 (81.6%) and high-dose thiamine for 26 (18.4%). Patients for whom high-dose thiamine was prescribed were more likely to be those in whom a diagnosis of WE was being considered (12/26 [46.2%] versus 5/115 [4.3%], p < 0.001). Of the total 219 IV thiamine doses ordered, 180 (82.2%) were for 100 mg, and 143 (65.3%) were prescribed for once-daily administration. There was no statistically significant difference in the time to resolution of WE symptoms for patients receiving high-dose versus low-dose thiamine. CONCLUSIONS A wide variety of thiamine prescribing patterns were noted. This study did not show a difference in time to resolution of WE symptoms in relation to the dose of IV thiamine. Additional large-scale studies are required to determine the optimal dosing of thiamine for WE.
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Affiliation(s)
- Uzma Alim
- BScPharm, ACPR, PharmD, is a Clinical Pharmacist with St Joseph's Health Centre, Toronto, Ontario
| | - Duane Bates
- BScPharm, ACPR, is a Clinical Pharmacist with Calgary Zone, Alberta Health Services (Peter Lougheed Hospital), Calgary, Alberta
| | - Ashten Langevin
- BSc, BScPharm, is a Clinical Pharmacist with Calgary Zone, Alberta Health Services (Foothills Medical Center). Ashten Langevin is also a PharmD student with the University of Alberta
| | - Denise Werry
- BScPharm, ACPR, PharmD, is a Clinical Pharmacist-Infectious Diseases with Calgary Zone, Alberta Health Services (Foothills Medical Center), Calgary, Alberta
| | - Deonne Dersch-Mills
- BSc Pharm, ACPR, PharmD, is Clinical Practice Leader with Calgary Zone, Alberta Health Services (Alberta Children's Hospital), Calgary, Alberta
| | - Robert J Herman
- MD, FRCPC, is a Professor in the Department of Medicine, University of Calgary, Calgary, Alberta
| | - Marcy Mintz
- MD, FRCPC, MHPE, is a Clinical Associate Professor in the Department of Medicine, University of Calgary, Calgary, Alberta
| | - Sunita Ghosh
- PhD, PStat, is an Assistant Clinical Professor in the Department of Oncology, Division of Medical Oncology, Cross Cancer Institute, Edmonton, Alberta
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