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Norgren J, Daniilidou M, Kåreholt I, Sindi S, Akenine U, Nordin K, Rosenborg S, Ngandu T, Kivipelto M, Sandebring-Matton A. Serum proBDNF Is Associated With Changes in the Ketone Body β-Hydroxybutyrate and Shows Superior Repeatability Over Mature BDNF: Secondary Outcomes From a Cross-Over Trial in Healthy Older Adults. Front Aging Neurosci 2021; 13:716594. [PMID: 34489682 PMCID: PMC8417778 DOI: 10.3389/fnagi.2021.716594] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 07/28/2021] [Indexed: 01/09/2023] Open
Abstract
Background: β-hydroxybutyrate (BHB) can upregulate brain-derived neurotrophic factor (BDNF) in mice, but little is known about the associations between BHB and BDNF in humans. The primary aim here was to investigate whether ketosis (i.e., raised BHB levels), induced by a ketogenic supplement, influences serum levels of mature BDNF (mBDNF) and its precursor proBDNF in healthy older adults. A secondary aim was to determine the intra-individual stability (repeatability) of those biomarkers, measured as intra-class correlation coefficients (ICC). Method: Three of the arms in a 6-arm randomized cross-over trial were used for the current sub-study. Fifteen healthy volunteers, 65–75 y, 53% women, were tested once a week. Test oils, mixed in coffee and cream, were ingested after a 12-h fast. Labeled by their level of ketosis, the arms provided: sunflower oil (lowK); coconut oil (midK); caprylic acid + coconut oil (highK). Repeated blood samples were collected for 4 h after ingestion. Serum BDNF levels were analyzed for changes from baseline to 1, 2 and 4 h to compare the arms. Individual associations between BHB and BDNF were analyzed cross-sectionally and for a delayed response (changes in BHB 0–2 h to changes in BDNF at 0–4 h). ICC estimates were calculated from baseline levels from the three study days. Results: proBDNF increased more in highK vs. lowK between 0 and 4 h (z-score: β = 0.25, 95% CI 0.07–0.44; p = 0.007). Individual change in BHB 0–2 h, predicted change in proBDNF 0–4 h, (β = 0.40, CI 0.12–0.67; p = 0.006). Change in mBDNF was lower in highK vs. lowK at 0–2 h (β = −0.88, CI −1.37 to −0.40; p < 0.001) and cumulatively 0–4 h (β = −1.01, CI −1.75 to −0.27; p = 0.01), but this could not be predicted by BHB levels. ICC was 0.96 (95% CI 0.92–0.99) for proBDNF, and 0.72 (CI 0.47–0.89) for mBDNF. Conclusions: The findings support a link between changes in peripheral BHB and proBDNF in healthy older adults. For mBDNF, changes differed between arms but independent to BHB levels. Replication is warranted due to the small sample. Excellent repeatability encourages future investigations on proBDNF as a predictor of brain health. Clinical Trial Registration:ClinicalTrials.gov, NCT03904433.
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Affiliation(s)
- Jakob Norgren
- Division of Clinical Geriatrics, Center for Alzheimer Research, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
| | - Makrina Daniilidou
- Division of Clinical Geriatrics, Center for Alzheimer Research, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden.,Division of Neurogeriatrics, Center for Alzheimer Research, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
| | - Ingemar Kåreholt
- Aging Research Center, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet and Stockholm University, Stockholm, Sweden.,Institute of Gerontology, School of Health and Welfare, Aging Research Network - Jönköping (ARN-J), Jönköping University, Jönköping, Sweden
| | - Shireen Sindi
- Division of Clinical Geriatrics, Center for Alzheimer Research, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden.,Ageing Epidemiology (AGE) Research Unit, School of Public Health, Imperial College London, London, United Kingdom
| | - Ulrika Akenine
- Division of Clinical Geriatrics, Center for Alzheimer Research, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden.,Theme Inflammation and Aging, Medical Unit Aging, Karolinska University Hospital, Stockholm, Sweden
| | - Karin Nordin
- Clinical Pharmacology, Karolinska University Hospital, Stockholm, Sweden
| | - Staffan Rosenborg
- Clinical Pharmacology, Karolinska University Hospital, Stockholm, Sweden
| | - Tiia Ngandu
- Division of Clinical Geriatrics, Center for Alzheimer Research, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden.,Population Health Unit, Department of Public Health and Welfare, Finnish Institute for Health and Welfare, Helsinki, Finland
| | - Miia Kivipelto
- Division of Clinical Geriatrics, Center for Alzheimer Research, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden.,Ageing Epidemiology (AGE) Research Unit, School of Public Health, Imperial College London, London, United Kingdom.,Theme Inflammation and Aging, Medical Unit Aging, Karolinska University Hospital, Stockholm, Sweden.,Department of Neurology, Institute of Clinical Medicine and Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland.,Research & Development Unit, Stockholms Sjukhem, Stockholm, Sweden
| | - Anna Sandebring-Matton
- Division of Clinical Geriatrics, Center for Alzheimer Research, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden.,Division of Neurogeriatrics, Center for Alzheimer Research, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden.,Ageing Epidemiology (AGE) Research Unit, School of Public Health, Imperial College London, London, United Kingdom
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Liu MJ, Sun AG, Zhao SG, Liu H, Ma SY, Li M, Huai YX, Zhao H, Liu HB. Resveratrol improves in vitro maturation of oocytes in aged mice and humans. Fertil Steril 2018; 109:900-907. [PMID: 29778389 DOI: 10.1016/j.fertnstert.2018.01.020] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 01/10/2018] [Accepted: 01/16/2018] [Indexed: 12/31/2022]
Abstract
OBJECTIVE To evaluate the effects of resveratrol on oocyte maturation in aged mice and humans. DESIGN Experimental laboratory study. SETTING University-based reproductive medicine center. PATIENT(S) A total of 64 women 38-45 years of age undergoing intracytoplasmic sperm injection (ICSI) and 48-52-week-old female C57BL/6J mice. INTERVENTION(S) In vitro culture in the presence of three different concentrations of resveratrol (0.1, 1.0, and 10 μm) or dimethylsulfoxide. MAIN OUTCOME MEASURE(S) Parameters of oocyte nuclear maturation, fertilization, immunofluorescence intensity of mitochondria, and normal morphology of spindle and chromosome of oocytes undergoing in vitro maturation (IVM) in aged mice and humans; blastocyst formation and levels of SRIT1, CAT, SOD1, and GPX4 gene expressions in aged mice. RESULT(S) Resveratrol at 1.0 μm significantly increased first polar body emission rate in oocytes derived from aged mice and humans, and an increased percentage of fertilization and blastocyst formation was observed in aged mice. In addition, immunofluorescence intensity of mitochondria and normal morphology of spindle and chromosome of oocytes undergoing IVM were notably improved compared with control samples in aged mice and human. Furthermore, the use of resveratrol exhibited enhanced expression patterns of SRIT1, CAT, SOD1, and GPX4 in aged mice. CONCLUSION(S) Resveratrol induced oocyte maturation and blastocyst formation in aged mice, and improved oocyte maturation and quality was examined in aged humans. In conclusion, 1.0 μm resveratrol was the appropriate concentration in IVM medium.
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Affiliation(s)
- Mei-Ju Liu
- Center for Reproductive Medicine, Shandong University, Jinan, People's Republic of China; Key Laboratory of Reproductive Endocrinology, Shandong University, Jinan, People's Republic of China; National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Jinan, People's Republic of China; Department of Reproductive Medicine, Linyi People's Hospital, Linyi, People's Republic of China
| | - Ai-Gang Sun
- Department of Neurological Surgery, Linyi People's Hospital, Linyi, People's Republic of China
| | - Shi-Gang Zhao
- Center for Reproductive Medicine, Shandong University, Jinan, People's Republic of China
| | - Hui Liu
- Center for Reproductive Medicine, Shandong University, Jinan, People's Republic of China
| | - Shui-Ying Ma
- Center for Reproductive Medicine, Shandong University, Jinan, People's Republic of China
| | - Mei Li
- Center for Reproductive Medicine, Shandong University, Jinan, People's Republic of China
| | - Ying-Xue Huai
- Center for Reproductive Medicine, Shandong University, Jinan, People's Republic of China
| | - Han Zhao
- Center for Reproductive Medicine, Shandong University, Jinan, People's Republic of China
| | - Hong-Bin Liu
- Center for Reproductive Medicine, Shandong University, Jinan, People's Republic of China.
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Sprung J, Roberts RO, Knopman DS, Olive DM, Gappa JL, Sifuentes VL, Behrend TL, Farmer JD, Weingarten TN, Hanson AC, Schroeder DR, Petersen RC, Warner DO. Association of Mild Cognitive Impairment With Exposure to General Anesthesia for Surgical and Nonsurgical Procedures: A Population-Based Study. Mayo Clin Proc 2016; 91:208-17. [PMID: 26803349 PMCID: PMC4967932 DOI: 10.1016/j.mayocp.2015.10.023] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Revised: 10/01/2015] [Accepted: 10/19/2015] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To examine whether exposure to general anesthesia for operations and procedures after the age of 40 years is associated with incident mild cognitive impairment (MCI) in elderly patients. PATIENTS AND METHODS A population-based, prospective cohort of Olmsted County, Minnesota, residents aged 70 to 89 years at enrollment, underwent baseline and 15-month interval evaluations that included the Clinical Dementia Rating scale, a neurologic evaluation, and neuropsychological testing. Anesthesia records after the age of 40 years until last evaluation for MCI were abstracted. Proportional hazards regression, adjusting for other known MCI risk factors, was used to assess whether exposure to surgical general anesthesia after the age of 40 years is associated with the incidence of MCI. RESULTS Of 1731 participants (mean age, 79 years), 536 (31.0%) developed MCI during a median follow-up of 4.8 years. Anesthesia exposure was not associated with MCI when analyzed as a dichotomous variable (any vs none; adjusted hazard ratio [HR], 1.07; 95% CI, 0.83-1.37; P=.61), the number of exposures (adjusted HR, 1.05; 95% CI, 0.78-1.42; adjusted HR, 1.12; 95% CI, 0.86-1.47; and adjusted HR, 1.02; 95% CI, 0.76-1.34, for 1, 2-3, and ≥4 exposures compared with no exposure as the reference; P=.73), or the total cumulative duration of exposure (adjusted HR, 1.00; 95% CI, 0.98-1.01, per 60-minute increase; P=.83). In secondary sensitivity analyses, anesthesia after 60 years of age was associated with incident MCI (adjusted HR, 1.25; 95% CI, 1.02-1.55; P=.04), as was exposure in the previous 20 and 10 years. CONCLUSION We found no significant association between cumulative exposure to surgical anesthesia after 40 years of age and MCI. However, these data do not exclude the possibility that anesthetic exposures occurring later in life may be associated with an increase in the rate of incident MCI.
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Affiliation(s)
- Juraj Sprung
- Department of Anesthesiology, Mayo Clinic, Rochester, MN.
| | - Rosebud O Roberts
- Division of Epidemiology, Department of Health Science Research, Mayo Clinic, Rochester, MN; Department of Neurology, Mayo Clinic, Rochester, MN
| | | | - Diana M Olive
- Department of Anesthesiology, Mayo Clinic, Rochester, MN
| | - Jennie L Gappa
- Department of Anesthesiology, Mayo Clinic, Rochester, MN
| | | | | | - Joel D Farmer
- Department of Anesthesiology, Mayo Clinic, Rochester, MN
| | | | - Andrew C Hanson
- Division of Biomedical Statistics and Informatics, Department of Health Sciences Research, Mayo Clinic, Rochester, MN
| | - Darrell R Schroeder
- Division of Biomedical Statistics and Informatics, Department of Health Sciences Research, Mayo Clinic, Rochester, MN
| | | | - David O Warner
- Department of Anesthesiology, Mayo Clinic, Rochester, MN
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Sprung J, Jankowski CJ, Roberts RO, Weingarten TN, Aguilar AL, Runkle KJ, Tucker AK, McLaren KC, Schroeder DR, Hanson AC, Knopman DS, Gurrieri C, Warner DO. Anesthesia and incident dementia: a population-based, nested, case-control study. Mayo Clin Proc 2013; 88:552-61. [PMID: 23642337 PMCID: PMC3784020 DOI: 10.1016/j.mayocp.2013.01.024] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2012] [Revised: 01/11/2013] [Accepted: 01/29/2013] [Indexed: 11/22/2022]
Abstract
OBJECTIVE To test the hypothesis that exposure to procedures requiring general anesthesia during adulthood is not significantly associated with incident dementia using a retrospective, population-based, nested, case-control study design. PARTICIPANTS AND METHODS Using the Rochester Epidemiology Project and the Mayo Clinic Alzheimer's Disease Patient Registry, residents of Olmsted County, Minnesota, diagnosed as having dementia between January 1, 1985, and December 31, 1994, were identified. For each incident case, a sex- and age-matched control was randomly selected from the general pool of Olmsted County residents who were dementia free in the index year of dementia diagnosis. Medical records were reviewed to determine exposures to procedures requiring anesthesia after age 45 years and before the index year. Data were analyzed using logistic regression. RESULTS We analyzed 877 cases of dementia, each with a corresponding control. Of the dementia cases, 615 (70%) underwent 1681 procedures requiring general anesthesia; of the controls, 636 (73%) underwent 1638 procedures. When assessed as a dichotomous variable, anesthetic exposure was not significantly associated with dementia (odds ratio, 0.89; 95% CI, 0.73-1.10; P=.27). In addition, no significant association was found when exposure was quantified as number of procedures (odds ratios, 0.87, 0.86, and 1.0 for 1, 2-3, and ≥4 exposures, respectively, compared with none; P=.51). CONCLUSION This study found no significant association between exposure to procedures requiring general anesthesia after age 45 years and incident dementia.
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Affiliation(s)
- Juraj Sprung
- Department of Anesthesiology, Mayo Clinic, Rochester, MN, USA.
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