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Shen T, Sheriff S, You Y, Jiang J, Schulz A, Francis H, Mirzaei M, Saks D, Palanivel V, Basavarajappa D, Chitranshi N, Gupta V, Wen W, Sachdev PS, Jia H, Sun X, Graham SL, Gupta VK. Brain-Derived Neurotrophic Factor Val66Met is Associated with Variation in Cortical Structure in Healthy Aging Subjects. Aging Dis 2024; 15:2315-2327. [PMID: 38916728 PMCID: PMC11346411 DOI: 10.14336/ad.2024.0346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Accepted: 05/13/2024] [Indexed: 06/26/2024] Open
Abstract
Aging is associated with progressive brain atrophy and declines in learning and memory, often attributed to hippocampal or cortical deterioration. The role of brain-derived neurotrophic factor (BDNF) in modulating the structural and functional changes in the brain and visual system, particularly in relation to BDNF Val66Met polymorphism, remains underexplored. In this present cross-sectional observational study, we aimed to assess the effects of BDNF polymorphism on brain structural integrity, cognitive function, and visual pathway alterations. A total of 108 older individuals with no evidence of dementia and a mean (SD) age of 67.3 (9.1) years were recruited from the Optic Nerve Decline and Cognitive Change (ONDCC) study cohort. The BDNF Met allele carriage had a significant association with lower entorhinal cortex volume (6.7% lower compared to the Val/Val genotype, P = 0.02) and posterior cingulate volume (3.2% lower than the Val/Val group, P = 0.03), after adjusting for confounding factors including age, sex and estimated total intracranial volumes (eTIV). No significant associations were identified between the BDNF Val66Met genotype and other brain volumetric or diffusion measures, cognitive performances, or vision parameters except for temporal retinal nerve fibre layer thickness. Small but significant correlations were found between visual structural and functional, cognitive, and brain morphological metrics. Our findings suggest that carriage of BDNF Val66Met polymorphism is associated with lower entorhinal cortex and posterior cingulate volumes and may be involved in modulating the cortical morphology along the aging process.
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Affiliation(s)
- Ting Shen
- Department of Ophthalmology, Shanghai General Hospital, Shanghai Jiao Tong University, School of Medicine, National Clinical Research Center for Eye Diseases, Shanghai Key Laboratory of Ocular Fundus Diseases, Shanghai Engineering Center for Precise Diagnosis and Treatment of Eye Diseases, Shanghai 200080, China
- Macquarie Medical School, Macquarie University, Sydney, NSW 2109, Australia
- Save Sight Institute, The University of Sydney, Sydney, NSW 2000, Australia
| | - Samran Sheriff
- Macquarie Medical School, Macquarie University, Sydney, NSW 2109, Australia
| | - Yuyi You
- Macquarie Medical School, Macquarie University, Sydney, NSW 2109, Australia
- Save Sight Institute, The University of Sydney, Sydney, NSW 2000, Australia
| | - Jiyang Jiang
- Centre for Healthy Brain Ageing, School of Clinical Medicine, University of New South Wales, Sydney, NSW 2052, Australia
| | - Angela Schulz
- Macquarie Medical School, Macquarie University, Sydney, NSW 2109, Australia
| | - Heather Francis
- Macquarie Medical School, Macquarie University, Sydney, NSW 2109, Australia
- Neurology Department, Royal North Shore Hospital, St Leonards NSW 2065, Australia
| | - Mehdi Mirzaei
- Macquarie Medical School, Macquarie University, Sydney, NSW 2109, Australia
| | - Danit Saks
- Macquarie Medical School, Macquarie University, Sydney, NSW 2109, Australia
| | | | | | - Nitin Chitranshi
- Macquarie Medical School, Macquarie University, Sydney, NSW 2109, Australia
| | - Veer Gupta
- Faculty of Health, Deakin University, VIC 3125, Australia
| | - Wei Wen
- Centre for Healthy Brain Ageing, School of Clinical Medicine, University of New South Wales, Sydney, NSW 2052, Australia
| | - Perminder S Sachdev
- Centre for Healthy Brain Ageing, School of Clinical Medicine, University of New South Wales, Sydney, NSW 2052, Australia
- Neuropsychiatric Institute, Prince of Wales Hospital, Randwick NSW 2031, Australia
| | - Huixun Jia
- Department of Ophthalmology, Shanghai General Hospital, Shanghai Jiao Tong University, School of Medicine, National Clinical Research Center for Eye Diseases, Shanghai Key Laboratory of Ocular Fundus Diseases, Shanghai Engineering Center for Precise Diagnosis and Treatment of Eye Diseases, Shanghai 200080, China
| | - Xiaodong Sun
- Department of Ophthalmology, Shanghai General Hospital, Shanghai Jiao Tong University, School of Medicine, National Clinical Research Center for Eye Diseases, Shanghai Key Laboratory of Ocular Fundus Diseases, Shanghai Engineering Center for Precise Diagnosis and Treatment of Eye Diseases, Shanghai 200080, China
| | - Stuart L Graham
- Macquarie Medical School, Macquarie University, Sydney, NSW 2109, Australia
- Save Sight Institute, The University of Sydney, Sydney, NSW 2000, Australia
| | - Vivek K Gupta
- Macquarie Medical School, Macquarie University, Sydney, NSW 2109, Australia
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The protective effect of Angiotensin AT2-receptor stimulation in Neuromyelitis optica spectrum disorder is independent of astrocyte-derived BDNF. Mult Scler Relat Disord 2021; 53:103033. [PMID: 34090131 DOI: 10.1016/j.msard.2021.103033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 04/19/2021] [Accepted: 05/12/2021] [Indexed: 11/20/2022]
Abstract
BACKGROUND Neuromyelitis optica spectrum disorder (NMOSD) is an antibody-mediated autoimmune inflammatory disease of the central nervous system (CNS), resulting in primary astrocytopathy. We have previously shown that Angiotensin AT2-receptor (AT2R) stimulation with the specific agonist Compound 21 (C21) attenuated NMOSD-like pathology. Recent studies have proposed that the mechanism behind protective effects of AT2R includes induction of brain derived neurotrophic factor (BDNF). Astrocytes are a major cellular source of BDNF. In this study we used mice with conditional BDNF deficiency in astrocytes (GfapF) to examine the involvement of astrocyte-derived BDNF in NMOSD-like pathology and in mediating the protective effect of AT2R stimulation. METHODS Anti-aquaporin-4 IgG (AQP4-IgG) from an NMOSD patient and human complement (C) were co-injected intrastriatally to GfapF and wildtype littermate BDNFfl/fl mice (WT), together with either C21 or vehicle at day 0, followed by intrathecal injection of C21 or vehicle at day 2 and tissue collection at day 4. RESULTS Intracerebral/intrathecal injection of C21, alone or in combination with AQP4-IgG + C, induced BDNF expression in WT mice. Injection of AQP4-IgG + C induced NMOSD-like pathology, including loss of AQP4 and GFAP. There was no difference in the severity of pathological changes between GfapF and WT mice. C21 treatment significantly and equally ameliorated NMOSD-like pathology in both WT and GfapF mice. CONCLUSION Our findings indicate that astrocyte-derived BDNF neither reduces the severity of NMOSD-like pathology nor is it necessary for the protective effect of AT2R stimulation in NMOSD-like pathology.
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