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Tran E, Cabán M, Meng A, Wetmore J, Ottman R, Siegel K. Beliefs About the Causes of Alzheimer's Disease Among Latinos in New York City. J Community Health 2024:10.1007/s10900-024-01386-x. [PMID: 39179761 DOI: 10.1007/s10900-024-01386-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/25/2024] [Indexed: 08/26/2024]
Abstract
Latinos face health disparities in Alzheimer's disease (AD), with high disease prevalence relative to non-Latino whites and barriers to healthcare access. Several studies have found misconceptions about AD among Latinos that were linked to reduced preventative or help-seeking behavior. To improve understanding of illness perceptions among Latinos, we examined beliefs about the causes of AD, one of the five dimensions of illness representations from Leventhal's Self-Regulation Theory, among a sample of N = 216 Latinos. We conducted in-depth, semi-structured interviews with participants aged 40 to 64 (average age 53 years) living in northern Manhattan. Seven distinct causes of AD were identified, though participants demonstrated a general understanding of AD as a multifactorial disease. Genetics was found to be the most endorsed cause of AD, followed by unhealthy lifestyle factors. Most Latinos who believed psychosocial factors played a critical role in AD development were first-generation immigrants. No participants attributed AD to a normal process of aging, and few ascribed the disease to brain damage from stroke or head injuries. Several participants expressed the belief that environmental contaminants can cause AD, which has received little mention in prior studies. Though only a small number thought AD could occur by chance, most participants remained uncertain about the exact causes of the disease and used lay knowledge to explain their beliefs. Our findings help identify areas where educational interventions would be beneficial in improving community knowledge and offer perspectives that can foster cultural competency in healthcare.
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Affiliation(s)
- Evelyn Tran
- Department of Sociomedical Sciences, Columbia University Mailman School of Public Health, New York, NY, USA
| | - María Cabán
- Department of Sociomedical Sciences, Columbia University Mailman School of Public Health, New York, NY, USA
| | - Alicia Meng
- Department of Sociomedical Sciences, Columbia University Mailman School of Public Health, New York, NY, USA
| | - John Wetmore
- Gertrude H. Sergievsky Center, Columbia University Irving Medical Center, New York, NY, USA
- Department of Epidemiology, Columbia University Mailman School of Public Health, New York, NY, USA
| | - Ruth Ottman
- Gertrude H. Sergievsky Center, Columbia University Irving Medical Center, New York, NY, USA
- Department of Epidemiology, Columbia University Mailman School of Public Health, New York, NY, USA
- Department of Neurology, Columbia University Irving Medical Center, New York, NY, USA
- New York State Psychiatric Institute, Division of Translational Epidemiology and Mental Health Equity, New York, NY, USA
| | - Karolynn Siegel
- Department of Sociomedical Sciences, Columbia University Mailman School of Public Health, New York, NY, USA.
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Bigler ED, Allder S, Victoroff J. What traditional neuropsychological assessment got wrong about mild traumatic brain injury. II: limitations in test development, research design, statistical and psychometric issues. Brain Inj 2024:1-22. [PMID: 39066740 DOI: 10.1080/02699052.2024.2376261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 05/16/2024] [Accepted: 06/30/2024] [Indexed: 07/30/2024]
Abstract
PRIMARY OBJECTIVE This is Part II of a four-part opinion review on traditional neuropsychological assessment methods and findings associated with mild traumatic brain injury (mTBI). This Part II review focuses on historical, psychometric and statistical issues involving traditional neuropsychological methods that have been used in neuropsychological outcome studies of mTBI, but demonstrates the critical limitations of traditional methods. RESEARCH DESIGN This is an opinion review. METHODS AND PROCEDURES Traditional neuropsychological tests are dated and lack specificity in evaluating such a heterogenous and complex injury as occurs with mTBI. MAIN OUTCOME AND RESULTS In this review, we demonstrate traditional neuropsychological methods were never developed as standalone measures for detecting subtle changes in neurocognitive or neurobehavioral functioning and likewise, never designed to address the multifaceted issues related to underlying mTBI neuropathology symptom burden from having sustained a concussive brain injury. CONCLUSIONS For neuropsychological assessment to continue to contribute to clinical practice and outcome literature involving mTBI, major innovative changes are needed that will likely require technological advances of novel assessment techniques more specifically directed to evaluating the mTBI patient. These will be discussed in Part IV.
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Affiliation(s)
- Erin D Bigler
- Department of Psychology and Neuroscience Center, Brigham Young University, Provo, Utah, USA
- Departments of Neurology and Psychiatry, University of Utah, Salt Lake City, Utah, USA
| | - Steven Allder
- Consultant Neurologist and Clinical Director, Re: Cognition Health, London, UK
| | - Jeff Victoroff
- Department of Neurology, University of Southern California, Los Angeles, California, USA
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Schneider ALC, Pike JR, Elser H, Coresh J, Mosley TH, Diaz-Arrastia R, Gottesman RF. Traumatic brain injury and cognitive change over 30 years among community-dwelling older adults. Alzheimers Dement 2024. [PMID: 38970220 DOI: 10.1002/alz.14104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 05/17/2024] [Accepted: 06/07/2024] [Indexed: 07/08/2024]
Abstract
INTRODUCTION There is limited evidence regarding the rate of long-term cognitive decline after traumatic brain injury (TBI) among older adults. METHODS In this prospective cohort study, time-varying TBI was defined by self-report and International Classification of Disease diagnostic codes. Cognitive testing was performed at five visits over 30 years and scores were combined into a global cognition factor score. Adjusted linear mixed-effects models estimated the association of TBI with cognitive change. RESULTS A total of 11,701 Atherosclerosis Risk in Communities (ARIC) Study participants (mean baseline age 58 years, 58% female, 25% Black) without TBI at baseline were included. Over follow-up, 18% experienced TBI. The adjusted average decline in cognition per decade (standard deviation units) was more than twice as fast among individuals with ≥ 2 incident TBIs (𝛽 = -0.158, 95% confidence interval [CI] = -0.253,-0.063), but not among individuals with 1 TBI (𝛽 = -0.052, 95% CI = -0.107, 0.002), compared to without TBI (𝛽 = -0.057, 95% CI = -0.095, -0.020). DISCUSSION This study provides robust evidence that TBIs fundamentally alter the trajectories of cognitive decline. HIGHLIGHTS The adjusted average decline in cognition per decade (standard deviation units) was more than twice as fast among individuals with ≥ 2 incident traumatic brain injuries (TBIs; 𝛽 = -0.158, 95% confidence interval [CI] = -0.253, -0.063), but not with 1 TBI (𝛽 = -0.052, 95% CI = -0.107, 0.002), compared to without TBI (𝛽 = -0.057, 95% CI = -0.095, -0.020). Over a period of 30 years, this difference in cognitive decline is equivalent to individuals with ≥ 2 TBIs being 9.7 years older at baseline. Associations of TBI were stronger among individuals with one or two apolipoprotein E (APOE) ε4 alleles than among individuals with zero APOE ε4 alleles (P interaction = 0.007).
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Affiliation(s)
- Andrea L C Schneider
- Department of Neurology, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
- Department of Biostatistics, Epidemiology, and Informatics, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - James R Pike
- Department of Population Health, New York University Grossman School of Medicine, New York, New York, USA
| | - Holly Elser
- Department of Neurology, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - Josef Coresh
- Department of Population Health, New York University Grossman School of Medicine, New York, New York, USA
| | - Thomas H Mosley
- The MIND Center, University of Mississippi Medical Center, Jackson, Mississippi, USA
| | - Ramon Diaz-Arrastia
- Department of Neurology, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - Rebecca F Gottesman
- National Institute of Neurological Disorders and Stroke Intramural Research Program, National Institutes of Health, Bethesda, Maryland, USA
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Shahim P, Pham DL, van der Merwe AJ, Moore B, Chou Y, Lippa SM, Kenney K, Diaz‐Arrastia R, Chan L. Serum NfL and GFAP as biomarkers of progressive neurodegeneration in TBI. Alzheimers Dement 2024; 20:4663-4676. [PMID: 38805359 PMCID: PMC11247683 DOI: 10.1002/alz.13898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 04/01/2024] [Accepted: 04/12/2024] [Indexed: 05/30/2024]
Abstract
BACKGROUND We examined spatial patterns of brain atrophy after mild, moderate, and severe traumatic brain injury (TBI), the relationship between progression of brain atrophy with initial traumatic axonal injury (TAI), cognitive outcome, and with serum biomarkers of brain injury. METHODS A total of 143 patients with TBI and 43 controls were studied cross-sectionally and longitudinally up to 5 years with multiple assessments, which included brain magnetic resonance imaging, cognitive testing, and serum biomarkers. RESULTS TBI patients showed progressive volume loss regardless of injury severity over several years, and TAI was independently associated with accelerated brain atrophy. Cognitive performance improved over time. Higher baseline serum neurofilament light (NfL) and glial fibrillary acidic protein (GFAP) were associated with greater rate of brain atrophy over 5 years. DISCUSSSION Spatial patterns of atrophy differ by injury severity and TAI is associated with the progression of brain atrophy. Serum NfL and GFAP show promise as non-invasive prognostic biomarkers of progressive neurodegeneration in TBI. HIGHLIGHTS In this longitudinal study of patient with mild, moderate, and severe traumatic brain injury (TBI) who were assessed with paired magnetic resonance imaging (MRI), blood biomarkers, and cognitive assessments, we found that brain atrophy after TBI is progressive and continues for many years even after a mild head trauma without signs of brain injury on conventional MRI. We found that spatial pattern of brain atrophy differs between mild, moderate, and severe TBI, where in patients with mild TBI , atrophy is mainly seen in the gray matter, while in those with moderate to severe brain injury atrophy is predominantly seen in the subcortical gray matter and whiter matter. Cognitive performance improves over time after a TBI. Serum measures of neurofilament light or glial fibrillary acidic protein are associated with progression of brain atrophy after TBI.
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Affiliation(s)
- Pashtun Shahim
- Rehabilitation Medicine DepartmentNational Institutes of Health (NIH) Clinical CenterBethesdaMarylandUSA
- National Institutes of Neurological Disorders and Stroke, NIHBethesdaMarylandUSA
- Department of NeurologyMedStar Georgetown University Hospital, Pasquerilla Healthcare CenterWashingtonDistrict of ColumbiaUSA
- The Military Traumatic Brain Injury Initiative (MTBI2)BethesdaMarylandUSA
- The Henry M. Jackson Foundation for the Advancement of Military MedicineBethesdaMarylandUSA
| | - Dzung L. Pham
- The Military Traumatic Brain Injury Initiative (MTBI2)BethesdaMarylandUSA
- Uniformed Services University of the Health SciencesBethesdaMarylandUSA
| | - Andre J. van der Merwe
- Rehabilitation Medicine DepartmentNational Institutes of Health (NIH) Clinical CenterBethesdaMarylandUSA
- The Military Traumatic Brain Injury Initiative (MTBI2)BethesdaMarylandUSA
- The Henry M. Jackson Foundation for the Advancement of Military MedicineBethesdaMarylandUSA
| | - Brian Moore
- Rehabilitation Medicine DepartmentNational Institutes of Health (NIH) Clinical CenterBethesdaMarylandUSA
- The Military Traumatic Brain Injury Initiative (MTBI2)BethesdaMarylandUSA
- The Henry M. Jackson Foundation for the Advancement of Military MedicineBethesdaMarylandUSA
| | - Yi‐Yu Chou
- The Military Traumatic Brain Injury Initiative (MTBI2)BethesdaMarylandUSA
- The Henry M. Jackson Foundation for the Advancement of Military MedicineBethesdaMarylandUSA
| | - Sara M. Lippa
- Uniformed Services University of the Health SciencesBethesdaMarylandUSA
- National Intrepid Center of Excellence, Walter Reed National Military Medical CenterBethesdaMarylandUSA
| | - Kimbra Kenney
- Uniformed Services University of the Health SciencesBethesdaMarylandUSA
- National Intrepid Center of Excellence, Walter Reed National Military Medical CenterBethesdaMarylandUSA
| | - Ramon Diaz‐Arrastia
- Department of NeurologyUniversity of Pennsylvania Perelman School of MedicinePhiladelphiaPennsylvaniaUSA
| | - Leighton Chan
- Rehabilitation Medicine DepartmentNational Institutes of Health (NIH) Clinical CenterBethesdaMarylandUSA
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Carosella CM, Gottesman RF, Kucharska-Newton A, Lutsey PL, Spira AP, Punjabi NM, Schneider ALC, Full KM, Johnson EL. Sleep apnea, hypoxia, and late-onset epilepsy: the Atherosclerosis Risk in Communities study. Sleep 2024; 47:zsad233. [PMID: 37672002 PMCID: PMC11168763 DOI: 10.1093/sleep/zsad233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 07/07/2023] [Indexed: 09/07/2023] Open
Abstract
STUDY OBJECTIVE Sleep apnea is associated with unexplained epilepsy in older adults in small studies. We sought to determine the relationship between sleep apnea and additional sleep characteristics and late-onset epilepsy (LOE), adjusting for comorbidities, using data from the large, prospective Atherosclerosis Risk in Communities (ARIC) Study cohort. METHODS We used Medicare claims to identify cases of LOE in ARIC participants. We used polysomnography data from 1309 ARIC participants who also participated in the Sleep Heart Health Study in 1995-1998, and demographic and comorbidity data from ARIC. Later risk of LOE was evaluated using survival analysis with a competing risk of death. We also used survival analysis in 2672 ARIC participants to identify the association between self-reported obstructive sleep apnea (2011-2013), and the risk of subsequent LOE. RESULTS Late-midlife oxygen desaturation to less than 80% during sleep was associated with subsequent development of LOE, adjusted subhazard ratio 3.28 (1.18-9.08), but the apnea-hypopnea index was not related. Participant report of diagnosis of sleep apnea in 2011-2013 was also associated with subsequent LOE, adjusted subhazard ratio 2.59 (1.24-5.39). CONCLUSIONS Sleep apnea and oxygen saturation nadir during sleep are associated with LOE, independently of hypertension and other comorbidities. These potentially modifiable risk factors could have large clinical implications for LOE.
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Affiliation(s)
| | - Rebecca F Gottesman
- National Institutes of Health, National Institute for Neurologic Disorders and Stroke Intramural Research Program, Bethesda, MD, USA
| | - Anna Kucharska-Newton
- Department of Epidemiology, University of North Carolina, Chapel Hill, NC, USA
- Department of Epidemiology, University of Kentucky, Lexington, KY, USA
| | - Pamela L Lutsey
- Division of Epidemiology and Community Health, University of Minnesota School of Public Health, Minneapolis, MN, USA
| | - Adam P Spira
- Department of Mental Health, Johns Hopkins School of Public Health, Baltimore, MD, USA
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins School of Medicine, Baltimore, MD, USA
- Johns Hopkins Center on Aging and Health, Baltimore, MD, USA
| | - Naresh M Punjabi
- Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, University of Miami, Miami, FL, USA
| | - Andrea L C Schneider
- Department of Neurology, University of Pennsylvania, Philadelphia, PA, USA
- Department of Biostatistics, Epidemiology, and Informatics Philadelphia, University of Pennsylvania, PA, USA
| | - Kelsie M Full
- Division of Epidemiology and Community Health, University of Minnesota School of Public Health, Minneapolis, MN, USA
| | - Emily L Johnson
- Department of Neurology, Johns Hopkins School of Medicine, Baltimore, MD, USA
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D'Alonzo BA, Bretzin AC, Schneider AL, Morse RB, Canelón SP, Wiebe DJ, Boland MR. Comparison of different definitions of traumatic brain injury: implications for cohort characteristics and survival in women, Philadelphia, USA. Inj Prev 2024:ip-2023-045069. [PMID: 38802243 DOI: 10.1136/ip-2023-045069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Accepted: 04/29/2024] [Indexed: 05/29/2024]
Abstract
BACKGROUND Traumatic brain injury (TBI) is an acute injury that is understudied in civilian cohorts, especially among women, as TBI has historically been considered to be largely a condition of athletes and military service people. Both the Centres for Disease Control and Prevention (CDC) and Department of Defense (DOD)/Veterans Affairs (VA) have developed case definitions to identify patients with TBI from medical records; however, their definitions differ. We sought to re-examine these definitions to construct an expansive and more inclusive definition among a cohort of women with TBI. METHODS In this study, we use electronic health records (EHR) from a single healthcare system to study the impact of using different case definitions to identify patients with TBI. Specifically, we identified adult female patients with TBI using the CDC definition, DOD/VA definition and a combined and expanded definition herein called the Penn definition. RESULTS We identified 4446 adult-female TBI patients meeting the CDC definition, 3619 meeting the DOD/VA definition, and together, 6432 meeting our expanded Penn definition that includes the CDC ad DOD/VA definitions. CONCLUSIONS Using the expanded definition identified almost two times as many patients, enabling investigations to more fully characterise these patients and related outcomes. Our expanded TBI case definition is available to other researchers interested in employing EHRs to investigate TBI.
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Affiliation(s)
- Bernadette A D'Alonzo
- Department of Biostatistics Epidemiology and Informatics, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - Abigail C Bretzin
- Department of Emergency Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Andrea Lc Schneider
- Department of Biostatistics Epidemiology and Informatics, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
- Department of Neurology, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - Rebecca B Morse
- Department of Biostatistics Epidemiology and Informatics, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - Silvia P Canelón
- Department of Emergency Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - Douglas J Wiebe
- Department of Emergency Medicine, University of Michigan, Ann Arbor, Michigan, USA
- University of Michigan School of Public Health, Ann Arbor, Michigan, USA
| | - Mary Regina Boland
- Department of Mathematics, Saint Vincent College, Latrobe, Pennsylvania, USA
- Department of Marketing, Analytics and Global Commerce, Saint Vincent College, Latrobe, Pennsylvania, USA
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Song H, Tomasevich A, Paolini A, Browne KD, Wofford KL, Kelley B, Kantemneni E, Kennedy J, Qiu Y, Schneider ALC, Dolle JP, Cullen DK, Smith DH. Sex differences in the extent of acute axonal pathologies after experimental concussion. Acta Neuropathol 2024; 147:79. [PMID: 38705966 PMCID: PMC11070329 DOI: 10.1007/s00401-024-02735-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Revised: 04/16/2024] [Accepted: 04/17/2024] [Indexed: 05/07/2024]
Abstract
Although human females appear be at a higher risk of concussion and suffer worse outcomes than males, underlying mechanisms remain unclear. With increasing recognition that damage to white matter axons is a key pathologic substrate of concussion, we used a clinically relevant swine model of concussion to explore potential sex differences in the extent of axonal pathologies. At 24 h post-injury, female swine displayed a greater number of swollen axonal profiles and more widespread loss of axonal sodium channels than males. Axon degeneration for both sexes appeared to be related to individual axon architecture, reflected by a selective loss of small caliber axons after concussion. However, female brains had a higher percentage of small caliber axons, leading to more extensive axon loss after injury compared to males. Accordingly, sexual dimorphism in axonal size is associated with more extensive axonal pathology in females after concussion, which may contribute to worse outcomes.
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Affiliation(s)
- Hailong Song
- Department of Neurosurgery, Center for Brain Injury and Repair, University of Pennsylvania, 3320 Smith Walk, 105 Hayden Hall, Philadelphia, PA, 19104, USA
| | - Alexandra Tomasevich
- Department of Neurosurgery, Center for Brain Injury and Repair, University of Pennsylvania, 3320 Smith Walk, 105 Hayden Hall, Philadelphia, PA, 19104, USA
| | - Andrew Paolini
- Department of Neurosurgery, Center for Brain Injury and Repair, University of Pennsylvania, 3320 Smith Walk, 105 Hayden Hall, Philadelphia, PA, 19104, USA
| | - Kevin D Browne
- Department of Neurosurgery, Center for Brain Injury and Repair, University of Pennsylvania, 3320 Smith Walk, 105 Hayden Hall, Philadelphia, PA, 19104, USA
- Center for Neurotrauma, Neurodegeneration and Restoration, Michael J. Crescenz Veterans Affairs Medical Center, Philadelphia, PA, 19104, USA
| | - Kathryn L Wofford
- Department of Neurosurgery, Center for Brain Injury and Repair, University of Pennsylvania, 3320 Smith Walk, 105 Hayden Hall, Philadelphia, PA, 19104, USA
- Center for Neurotrauma, Neurodegeneration and Restoration, Michael J. Crescenz Veterans Affairs Medical Center, Philadelphia, PA, 19104, USA
| | - Brian Kelley
- Department of Neurosurgery, Center for Brain Injury and Repair, University of Pennsylvania, 3320 Smith Walk, 105 Hayden Hall, Philadelphia, PA, 19104, USA
| | - Eashwar Kantemneni
- Department of Neurosurgery, Center for Brain Injury and Repair, University of Pennsylvania, 3320 Smith Walk, 105 Hayden Hall, Philadelphia, PA, 19104, USA
| | - Justin Kennedy
- Department of Neurosurgery, Center for Brain Injury and Repair, University of Pennsylvania, 3320 Smith Walk, 105 Hayden Hall, Philadelphia, PA, 19104, USA
| | - Yue Qiu
- Department of Neurosurgery, Center for Brain Injury and Repair, University of Pennsylvania, 3320 Smith Walk, 105 Hayden Hall, Philadelphia, PA, 19104, USA
| | - Andrea L C Schneider
- Department of Neurology, University of Pennsylvania, Philadelphia, PA, 19104, USA
- Department of Epidemiology, Biostatistics, and Informatics, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Jean-Pierre Dolle
- Department of Neurosurgery, Center for Brain Injury and Repair, University of Pennsylvania, 3320 Smith Walk, 105 Hayden Hall, Philadelphia, PA, 19104, USA
| | - D Kacy Cullen
- Department of Neurosurgery, Center for Brain Injury and Repair, University of Pennsylvania, 3320 Smith Walk, 105 Hayden Hall, Philadelphia, PA, 19104, USA
- Center for Neurotrauma, Neurodegeneration and Restoration, Michael J. Crescenz Veterans Affairs Medical Center, Philadelphia, PA, 19104, USA
- Department of Bioengineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Douglas H Smith
- Department of Neurosurgery, Center for Brain Injury and Repair, University of Pennsylvania, 3320 Smith Walk, 105 Hayden Hall, Philadelphia, PA, 19104, USA.
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2024 Alzheimer's disease facts and figures. Alzheimers Dement 2024; 20:3708-3821. [PMID: 38689398 PMCID: PMC11095490 DOI: 10.1002/alz.13809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
This article describes the public health impact of Alzheimer's disease (AD), including prevalence and incidence, mortality and morbidity, use and costs of care and the ramifications of AD for family caregivers, the dementia workforce and society. The Special Report discusses the larger health care system for older adults with cognitive issues, focusing on the role of caregivers and non-physician health care professionals. An estimated 6.9 million Americans age 65 and older are living with Alzheimer's dementia today. This number could grow to 13.8 million by 2060, barring the development of medical breakthroughs to prevent or cure AD. Official AD death certificates recorded 119,399 deaths from AD in 2021. In 2020 and 2021, when COVID-19 entered the ranks of the top ten causes of death, Alzheimer's was the seventh-leading cause of death in the United States. Official counts for more recent years are still being compiled. Alzheimer's remains the fifth-leading cause of death among Americans age 65 and older. Between 2000 and 2021, deaths from stroke, heart disease and HIV decreased, whereas reported deaths from AD increased more than 140%. More than 11 million family members and other unpaid caregivers provided an estimated 18.4 billion hours of care to people with Alzheimer's or other dementias in 2023. These figures reflect a decline in the number of caregivers compared with a decade earlier, as well as an increase in the amount of care provided by each remaining caregiver. Unpaid dementia caregiving was valued at $346.6 billion in 2023. Its costs, however, extend to unpaid caregivers' increased risk for emotional distress and negative mental and physical health outcomes. Members of the paid health care and broader community-based workforce are involved in diagnosing, treating and caring for people with dementia. However, the United States faces growing shortages across different segments of the dementia care workforce due to a combination of factors, including the absolute increase in the number of people living with dementia. Therefore, targeted programs and care delivery models will be needed to attract, better train and effectively deploy health care and community-based workers to provide dementia care. Average per-person Medicare payments for services to beneficiaries age 65 and older with AD or other dementias are almost three times as great as payments for beneficiaries without these conditions, and Medicaid payments are more than 22 times as great. Total payments in 2024 for health care, long-term care and hospice services for people age 65 and older with dementia are estimated to be $360 billion. The Special Report investigates how caregivers of older adults with cognitive issues interact with the health care system and examines the role non-physician health care professionals play in facilitating clinical care and access to community-based services and supports. It includes surveys of caregivers and health care workers, focusing on their experiences, challenges, awareness and perceptions of dementia care navigation.
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Schaffert J, LoBue C, Chiang HS, Peters ME, Hart Jr J, Cullum CM. Traumatic Brain Injury Characteristics Are Not Related to Neurocognitive Decline in Older Adults: A Nationwide Longitudinal Cohort Study. Arch Clin Neuropsychol 2024; 39:325-334. [PMID: 38332549 PMCID: PMC11042919 DOI: 10.1093/arclin/acae003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 12/13/2023] [Accepted: 01/17/2023] [Indexed: 02/10/2024] Open
Abstract
OBJECTIVE Evaluate whether traumatic brain injury (TBI) characteristics, age of injury, or recency of injury predicts the course of neurocognitive decline and/or increases conversion rates to mild cognitive impairment (MCI) or dementia. METHODS Data were obtained from the National Alzheimer's Coordinating Center for participants 50-85 years old with 3-5 visits from 2015 to 2022, with or without TBI history (TBI+ = 508; TBI- = 2,382). Groups were stratified by self-reported TBI history (i.e., single TBI without loss of consciousness [LOC], single TBI with LOC, multiple TBI without LOC, and multiple TBI with LOC), age of most recent TBI, and recency of TBI. Mixed linear models compared neuropsychological composite trajectories (executive functioning/attention/speed, language, memory, and global), co-varying for age, gender, education, apolipoprotein E4 status, race/ethnicity, and baseline diagnosis (normal aging n = 1,720, MCI n = 749, or dementia n = 417). Logistic binary regression examined MCI/dementia conversion rates. RESULTS There was a slightly higher frequency of MCI/dementia in those with multiple TBIs (50% to 60% with and without LOC, compared to 39% with no TBI) at baseline, but longitudinal trajectories were similar. TBI history, age of injury, or recency of injury did not impact neurocognitive trajectories or conversion rates to MCI/dementia (all p's > .01). CONCLUSIONS TBI history, regardless of injury characteristics, age of injury, or recency of injury, did not worsen neurocognitive decline or MCI/dementia conversion. Additional longitudinal research in more diverse cohorts with a wider range of TBI severity is needed to evaluate the specific factors and possible mechanisms in which TBI may increase dementia risk.
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Affiliation(s)
- Jeff Schaffert
- Department of Psychiatry, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Christian LoBue
- Departments of Psychiatry and Neurological Surgery, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Hsueh-Sheng Chiang
- Department of Neurology, UT Southwestern Dallas Medical Center, Dallas, TX 75390, USA
- School of Behavioral and Brain Sciences, The University of Texas at Dallas, Richardson, TX 75080, USA
| | - Matthew E Peters
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - John Hart Jr
- School of Behavioral and Brain Sciences, The University of Texas at Dallas, Richardson, TX 75080, USA
- Departments of Neurology and Psychiatry, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - C Munro Cullum
- Departments of Psychiatry, Neurology, and Neurological Surgery, UT Southwestern Medical Center, Dallas, TX 75390, USA
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Jaisa-aad M, Muñoz-Castro C, Serrano-Pozo A. Update on modifiable risk factors for Alzheimer's disease and related dementias. Curr Opin Neurol 2024; 37:166-181. [PMID: 38265228 PMCID: PMC10932854 DOI: 10.1097/wco.0000000000001243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2024]
Abstract
PURPOSE OF REVIEW All human beings undergo a lifelong cumulative exposure to potentially preventable adverse factors such as toxins, infections, traumatisms, and cardiovascular risk factors, collectively termed exposome. The interplay between the individual's genetics and exposome is thought to have a large impact in health outcomes such as cancer and cardiovascular disease. Likewise, a growing body of evidence is supporting the idea that preventable factors explain a sizable proportion of Alzheimer's disease and related dementia (ADRD) cases. RECENT FINDINGS Here, we will review the most recent epidemiological, experimental preclinical, and interventional clinical studies examining some of these potentially modifiable risk factors for ADRD. We will focus on new evidence regarding cardiovascular risk factors, air pollution, viral and other infectious agents, traumatic brain injury, and hearing loss. SUMMARY While greater and higher quality epidemiological and experimental evidence is needed to unequivocally confirm their causal link with ADRD and/or unravel the underlying mechanisms, these modifiable risk factors may represent a window of opportunity to reduce ADRD incidence and prevalence at the population level via health screenings, and education and health policies.
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Affiliation(s)
- Methasit Jaisa-aad
- Massachusetts General Hospital, Boston, MA 02114
- Harvard Medical School, Boston, MA 02115
| | - Clara Muñoz-Castro
- Massachusetts General Hospital, Boston, MA 02114
- Harvard Medical School, Boston, MA 02115
- Universidad de Sevilla, Sevilla (Spain)
| | - Alberto Serrano-Pozo
- Massachusetts General Hospital, Boston, MA 02114
- Harvard Medical School, Boston, MA 02115
- Massachusetts Alzheimer’s Disease Research Center
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Hunzinger KJ, Walter AE, Rosenthal KA, Windham BG, Palta P, Juraschek SP, Hicks CW, Gottesman RF, Schneider ALC. Associations Between Prior Head Injury, Physical Functioning, and Frailty in the Atherosclerosis Risk in Communities Study. J Gerontol A Biol Sci Med Sci 2024; 79:glae032. [PMID: 38284926 PMCID: PMC10972581 DOI: 10.1093/gerona/glae032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Indexed: 01/30/2024] Open
Abstract
BACKGROUND Older adults have the highest rates of head injury and are at the greatest risk for subsequent dysfunction, yet research on subsequent physical decline is limited. We sought to examine cross-sectional and prospective associations of head injury with physical functioning and frailty among older adults. METHODS A total of 5 598 Atherosclerosis Risk in Communities Study participants from Visit 5 (2011-13) underwent assessments of physical functioning (Short Physical Performance Battery [SPPB], comprised of gait speed, chair stands, and balance) and frailty (defined using established criteria) were followed through Visit 7 (2018-19). Head injury was self-reported or based on ICD-9 codes. Adjusted linear and multinomial logistic regression models were used to estimate associations. Prospective models incorporated inverse probability of attrition weights to account for death or attrition. RESULTS Participants were a mean age of 75 years, 58% were women, 22% were Black, and 27% had a prior head injury. Compared to individuals without head injury, individuals with head injury had worse physical functioning (SPPB total score, β-coefficient = -0.22, 95% CI: -0.35 to -0.09) and were more likely to be pre-frail (OR = 1.19, 95% CI: 1.04 to 1.35) or frail (OR = 1.40, 95% CI: 1.08 to 1.80) compared to robust. Prospectively, head injury was associated with a 0.02 m/s greater decline (95% CI: -0.04 to -0.01) in gait speed over a median of 5 years. Among baseline robust individuals (n = 1 847), head injury was associated with increased odds of becoming pre-frail (OR = 1.32, 95% CI: 1.04 to 1.67) or frail (OR = 1.92, 95% CI: 1.05 to 3.51) compared to robust. CONCLUSIONS Older adults with prior head injury had worse physical functioning and greater frailty at baseline and were more likely to become frail and walk slower over time, compared to individuals without head injury.
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Affiliation(s)
- Katherine J Hunzinger
- Department of Exercise Science, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Alexa E Walter
- Department of Neurology, University of Pennsylvania-Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - Kimberly A Rosenthal
- Department of Physical Medicine and Rehabilitation, Eastern Virginia Medical School, Norfolk, Virginia, USA
| | - B Gwen Windham
- Memory Impairment and Neurodegenerative Dementia (MIND) Center, University of Mississippi Medical Center, Jackson, Mississippi, USA
| | - Priya Palta
- Department of Neurology, University of North Carolina Chapel Hill, Chapel Hill, North Carolina, USA
| | - Stephen P Juraschek
- Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA
| | - Caitlin W Hicks
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Rebecca F Gottesman
- National Institute of Neurological Disorders and Stroke Intramural Research Program, Bethesda, Maryland, USA
| | - Andrea L C Schneider
- Department of Neurology, University of Pennsylvania-Perelman School of Medicine, Philadelphia, Pennsylvania, USA
- Department of Biostatistics, Epidemiology, and Informatics, University of Pennsylvania-Perelman School of Medicine, Philadelphia, Pennsylvania, USA
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Gerber KS, Alvarez G, Alamian A, Behar-Zusman V, Downs CA. Symptoms and Functional Outcomes Among Traumatic Brain Injury Patients 3- to 12-Months Post-Injury. J Trauma Nurs 2024; 31:72-81. [PMID: 38484161 DOI: 10.1097/jtn.0000000000000776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
BACKGROUND Patients with traumatic brain injury (TBI) experience a variety of physical, cognitive, and affective symptoms. However, the evolution of symptoms, especially during the 3- to 12-month convalescence period (when recovery of function is still possible), is understudied. OBJECTIVE This study aims to identify symptoms and the relationships with functional outcomes that occur during the 3- to 12-month period after a TBI. METHODS Participants who were 3 to 12 months post-TBI were recruited from a South Florida TBI clinic from May 2022 to June 2023. Clinical data were obtained from the electronic health record. Participants completed the Brain Injury Association of Virginia Symptom Checklist, Neuro-Quality of Life Cognitive Function, Anxiety, Depression, and Sleep Disturbance assessments to report symptoms, and the Disability Rating Scale and Satisfaction with Life Scale. Descriptive statistics were used to characterize demographics and symptoms. Linear regression was performed to analyze the relationships between symptoms and outcomes. RESULTS A total of N = 39 patients participated in the study. Memory problems and difficulty concentrating were the most common symptoms. Hospital length of stay, intensive care unit length of stay, cognitive, and physical symptoms were significantly associated with the Disability Rating Scale score. Physical, cognitive, depressive, and anxiety symptoms had significant associations with the Satisfaction with Life Scale. CONCLUSION Cognitive symptoms should be integrated into the clinical care of rehabilitating TBI patients. Nurses should monitor for physical, affective, and cognitive symptoms during the recovery phase of TBI.
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Affiliation(s)
- Kathryn S Gerber
- Author Affiliations: Departments of Nursing, University of Miami School of Nursing and Health Studies, Coral Gables, Florida, (Drs Gerber, Alamian, Behar-Zusman, and Downs); and Departments of Neurorehabilitation, University of Miami Miller School of Medicine, Miami, Florida (Dr Alvarez)
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Richey LN, Daneshvari NO, Young L, Bray MJ, Gottesman RF, Mosley T, Walker KA, Peters ME, Schneider AL. Associations of Prior Head Injury With Mild Behavioral Impairment Domains. J Head Trauma Rehabil 2024; 39:E48-E58. [PMID: 37335212 PMCID: PMC10728342 DOI: 10.1097/htr.0000000000000880] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/21/2023]
Abstract
OBJECTIVE This study investigated associations of prior head injury and number of prior head injuries with mild behavioral impairment (MBI) domains. SETTING The Atherosclerosis Risk in Communities (ARIC) Study. PARTICIPANTS A total of 2534 community-dwelling older adults who took part in the ARIC Neurocognitive Study stage 2 examination were included. DESIGN This was a prospective cohort study. Head injury was defined using self-reported and International Classification of Diseases, Ninth Revision ( ICD -9) code data. MBI domains were defined using the Neuropsychiatric Inventory Questionnaire (NPI-Q) via an established algorithm mapping noncognitive neuropsychiatric symptoms to the 6 domains of decreased motivation, affective dysregulation, impulse dyscontrol, social inappropriateness, and abnormal perception/thought content. MAIN MEASURES The primary outcome was the presence of impairment in MBI domains. RESULTS Participants were a mean age of 76 years, with a median time from first head injury to NPI-Q administration of 32 years. The age-adjusted prevalence of symptoms in any 1+ MBI domains was significantly higher among individuals with versus without prior head injury (31.3% vs 26.0%, P = .027). In adjusted models, a history of 2+ head injuries, but not 1 prior head injury, was associated with increased odds of impairment in affective dysregulation and impulse dyscontrol domains, compared with no history of head injury (odds ratio [OR] = 1.83, 95% CI = 1.13-2.98, and OR = 1.74, 95% CI = 1.08-2.78, respectively). Prior head injury was not associated with symptoms in MBI domains of decreased motivation, social inappropriateness, and abnormal perception/thought content (all P > .05). CONCLUSION Prior head injury in older adults was associated with greater MBI domain symptoms, specifically affective dysregulation and impulse dyscontrol. Our results suggest that the construct of MBI can be used to systematically examine the noncognitive neuropsychiatric sequelae of head injury; further studies are needed to examine whether the systematic identification and rapid treatment of neuropsychiatric symptoms after head injury is associated with improved outcomes.
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Affiliation(s)
- Lisa N. Richey
- Johns Hopkins University School of Medicine, Department of Psychiatry and Behavioral Sciences
| | - Nicholas O. Daneshvari
- Johns Hopkins University School of Medicine, Department of Psychiatry and Behavioral Sciences
| | - Lisa Young
- Johns Hopkins University School of Medicine, Department of Psychiatry and Behavioral Sciences
| | - Michael J.C. Bray
- Johns Hopkins University School of Medicine, Department of Psychiatry and Behavioral Sciences
| | - Rebecca F. Gottesman
- National Institutes of Health, National Institute of Neurological Disorders and Stroke Intramural Research Program
| | | | | | - Matthew E. Peters
- Johns Hopkins University School of Medicine, Department of Psychiatry and Behavioral Sciences
| | - Andrea L.C. Schneider
- University of Pennsylvania Perelman School of Medicine, Department of Neurology, Division of Neurocritical Care
- University of Pennsylvania Perelman School of Medicine, Department of Biostatistics, Epidemiology, and Informatics
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Ding Y, Luan W, Shen X, Wang Z, Cao Y. E2F1 Mediates Traumatic Brain Injury and Regulates BDNF-AS to Promote the Progression of Alzheimer's Disease. Neurotox Res 2024; 42:17. [PMID: 38386202 DOI: 10.1007/s12640-024-00695-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 12/14/2023] [Accepted: 02/09/2024] [Indexed: 02/23/2024]
Abstract
Traumatic brain injury (TBI) is one of the important risk factors for the development of Alzheimer's disease (AD). However, the molecular mechanism by which TBI promotes the progression of AD is not elucidated. In this study, we showed that the abnormal production of E2F1 is a major factor in promoting the neuropathological and cognitive deterioration of AD post-TBI. We found that repeated mild TBI can aggravate the neuropathology of AD in APP/PS1 mice. At the same time, the co-expression of E2F1 and beta-site APP cleaving enzyme 1 (BACE1) was upregulated when the mouse hippocampus was dissected. BACE1 is recognized as a rate-limiting enzyme for the production of Aβ. Here, we speculate that E2F1 may play a role in promoting BACE1 expression in AD. Therefore, we collected peripheral blood from patients with AD. Interestingly, there is a positive correlation between E2F1 and brain-derived neurotrophic factor-antisense (BDNF-AS), whereas BDNF-AS in AD can promote the expression of BACE1 and exhibit a neurotoxic effect. We established a cell model and found a regulatory relationship between E2F1 and BDNF-AS. Therefore, based on our results, we concluded that E2F1 regulates BDNF-AS, promotes the expression of BACE1, and affects the progression of AD. Furthermore, E2F1 mediates the TBI-induced neurotoxicity of AD.
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Affiliation(s)
- Yuting Ding
- Department of Neurology, The Second Affiliated Hospital of Soochow University, Suzhou, 215004, Jiangsu, China
- Department of Rehabilitation, Changshu No. 2 People's Hospital (Changshu Hospital Nantong University), Changshu, 215500, Jiangsu, China
| | - Wenkang Luan
- Department of Plastic Surgery, Affiliated People's Hospital of Jiangsu University, Zhenjiang , Jiangsu, 212000, China
| | - Xuanlin Shen
- Department of Rehabilitation, Changshu No. 2 People's Hospital (Changshu Hospital Nantong University), Changshu, 215500, Jiangsu, China
| | - Zhe Wang
- School of Medicine, JiangSu University, Zhenjiang , Jiangsu, 212013, China
| | - Yongjun Cao
- Department of Neurology, The Second Affiliated Hospital of Soochow University, Suzhou, 215004, Jiangsu, China.
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Lynch MA. A case for seeking sex-specific treatments in Alzheimer's disease. Front Aging Neurosci 2024; 16:1346621. [PMID: 38414633 PMCID: PMC10897030 DOI: 10.3389/fnagi.2024.1346621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Accepted: 01/15/2024] [Indexed: 02/29/2024] Open
Abstract
There is no satisfactory explanation for the sex-related differences in the incidence of many diseases and this is also true of Alzheimer's disease (AD), where females have a higher lifetime risk of developing the disease and make up about two thirds of the AD patient population. The importance of understanding the cause(s) that account for this disproportionate distribution cannot be overestimated, and is likely to be a significant factor in the search for therapeutic strategies that will combat the disease and, furthermore, potentially point to a sex-targeted approach to treatment. This review considers the literature in the context of what is known about the impact of sex on processes targeted by drugs that are in clinical trial for AD, and existing knowledge on differing responses of males and females to these drugs. Current knowledge strongly supports the view that trials should make assessing sex-related difference in responses a priority with a focus on exploring the sex-stratified treatments.
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Bourke E, Maddison R, Blakely T. Getting the epidemiological associations of physical inactivity with diseases and injuries correct in comparative risk assessment. Int J Epidemiol 2023; 52:1677-1680. [PMID: 37533290 PMCID: PMC10749740 DOI: 10.1093/ije/dyad107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Accepted: 07/24/2023] [Indexed: 08/04/2023] Open
Affiliation(s)
- Emily Bourke
- Melbourne School of Population and Global Health, University of Melbourne, Melbourne, VIC, Australia
| | - Ralph Maddison
- Institute for Physical Activity and Nutrition, School of Exercise & Nutrition Sciences, Deakin University, Geelong, VIC, Australia
| | - Tony Blakely
- Melbourne School of Population and Global Health, University of Melbourne, Melbourne, VIC, Australia
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17
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Hunzinger KJ, Law CA, Elser H, Walter AE, Windham BG, Palta P, Juraschek SP, Hicks CW, Gottesman RF, Schneider ALC. Associations Between Head Injury and Subsequent Risk of Falls: Results From the Atherosclerosis Risk in Communities (ARIC) Study. Neurology 2023; 101:e2234-e2242. [PMID: 37816634 PMCID: PMC10727209 DOI: 10.1212/wnl.0000000000207949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Accepted: 08/28/2023] [Indexed: 10/12/2023] Open
Abstract
BACKGROUND AND OBJECTIVES Falls are a leading cause of head injury among older adults, but the risk of fall occurring after a head injury is less well-characterized. We sought to examine the association between head injury and subsequent risk of falls requiring hospital care among community-dwelling older adults. METHODS This analysis included 13,081 participants in the Atherosclerosis Risk in Communities Study enrolled in 1987-1989 and followed through 2019. The association of head injury (time-varying exposure, self-reported and/or ICD-9/10 code identified) with the risk of subsequent (occurring >1-month after head injury) falls requiring hospital care (ICD-9/10 code defined) was modeled using Cox proportional hazards regression. Secondary analyses included Fine and Gray proportional hazards regression to account for the competing risk of death, analysis of head injury frequency and severity, and formal testing for interaction by age, sex, and race. Models were adjusted for age, sex, race/center, education, military service, alcohol consumption, smoking, diabetes, hypertension, and psychotropic medication use. RESULTS The mean age of participants at baseline was 54 years, 58% were female, 28% were Black, and 14% had at least one head injury occurring over the study period. Over a median 23 years of follow-up, 29% of participants had a fall requiring medical care. In adjusted Cox proportional hazards models, individuals with head injury had 2.01 (95% CI 1.85-2.18) times the risk of falls compared with individuals without head injury. Accounting for the competing risk of mortality, individuals with head injury had 1.69 (95% CI 1.57-1.82) times the risk of falls compared with individuals without head injury. We observed stronger associations among men compared with women (men: hazard ratio [HR] = 2.60, 95% CI 2.25-3.00; women: HR = 1.80, 95% CI 1.63-1.99, p-interaction <0.001). We observed evidence of a dose-response association for head injury number and severity with fall risk (1 injury: HR = 1.68, 95% CI 1.53-1.84; 2+ injuries: HR = 2.37, 95% CI 1.92-2.94 and mild: HR = 1.97, 95% CI 1.78-2.18; moderate/severe/penetrating: HR = 2.50, 95% CI 2.06-3.02). DISCUSSION Among community-dwelling older adults followed over 30 years, head injury was associated with subsequent falls requiring medical care. We observed stronger associations among men and with increasing number and severity of head injuries. Whether older individuals with head injury might benefit from fall prevention measures should be a focus of future research.
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Affiliation(s)
- Katherine J Hunzinger
- From the Department of Exercise Science (K.J.H.), Thomas Jefferson University; Department of Neurology (C.A.L., A.E.W., A.L.S.), University of Pennsylvania Perelman School of Medicine; Department of Neurology (H.E.), Hospital of the University of Pennsylvania; Memory Impairment and Neurodegenerative Dementia (MIND) Center (B.G.W.), University of Mississippi Medical Center; Department of Neurology (P.P.), University of North Carolina Chapel Hill; Department of Medicine (S.P.J.), Beth Israel Deaconess Medical Center; Department of Surgery (C.W.H.), Johns Hopkins University School of Medicine; National Institute of Neurological Disorders and Stroke (R.F.G.); Department of Biostatistics (A.L.S.), Epidemiology, and Informatics, University of Pennsylvania Perelman School of Medicine; and Penn Injury Science Center (A.L.S.), University of Pennsylvania.
| | - Connor A Law
- From the Department of Exercise Science (K.J.H.), Thomas Jefferson University; Department of Neurology (C.A.L., A.E.W., A.L.S.), University of Pennsylvania Perelman School of Medicine; Department of Neurology (H.E.), Hospital of the University of Pennsylvania; Memory Impairment and Neurodegenerative Dementia (MIND) Center (B.G.W.), University of Mississippi Medical Center; Department of Neurology (P.P.), University of North Carolina Chapel Hill; Department of Medicine (S.P.J.), Beth Israel Deaconess Medical Center; Department of Surgery (C.W.H.), Johns Hopkins University School of Medicine; National Institute of Neurological Disorders and Stroke (R.F.G.); Department of Biostatistics (A.L.S.), Epidemiology, and Informatics, University of Pennsylvania Perelman School of Medicine; and Penn Injury Science Center (A.L.S.), University of Pennsylvania
| | - Holly Elser
- From the Department of Exercise Science (K.J.H.), Thomas Jefferson University; Department of Neurology (C.A.L., A.E.W., A.L.S.), University of Pennsylvania Perelman School of Medicine; Department of Neurology (H.E.), Hospital of the University of Pennsylvania; Memory Impairment and Neurodegenerative Dementia (MIND) Center (B.G.W.), University of Mississippi Medical Center; Department of Neurology (P.P.), University of North Carolina Chapel Hill; Department of Medicine (S.P.J.), Beth Israel Deaconess Medical Center; Department of Surgery (C.W.H.), Johns Hopkins University School of Medicine; National Institute of Neurological Disorders and Stroke (R.F.G.); Department of Biostatistics (A.L.S.), Epidemiology, and Informatics, University of Pennsylvania Perelman School of Medicine; and Penn Injury Science Center (A.L.S.), University of Pennsylvania
| | - Alexa E Walter
- From the Department of Exercise Science (K.J.H.), Thomas Jefferson University; Department of Neurology (C.A.L., A.E.W., A.L.S.), University of Pennsylvania Perelman School of Medicine; Department of Neurology (H.E.), Hospital of the University of Pennsylvania; Memory Impairment and Neurodegenerative Dementia (MIND) Center (B.G.W.), University of Mississippi Medical Center; Department of Neurology (P.P.), University of North Carolina Chapel Hill; Department of Medicine (S.P.J.), Beth Israel Deaconess Medical Center; Department of Surgery (C.W.H.), Johns Hopkins University School of Medicine; National Institute of Neurological Disorders and Stroke (R.F.G.); Department of Biostatistics (A.L.S.), Epidemiology, and Informatics, University of Pennsylvania Perelman School of Medicine; and Penn Injury Science Center (A.L.S.), University of Pennsylvania
| | - B Gwen Windham
- From the Department of Exercise Science (K.J.H.), Thomas Jefferson University; Department of Neurology (C.A.L., A.E.W., A.L.S.), University of Pennsylvania Perelman School of Medicine; Department of Neurology (H.E.), Hospital of the University of Pennsylvania; Memory Impairment and Neurodegenerative Dementia (MIND) Center (B.G.W.), University of Mississippi Medical Center; Department of Neurology (P.P.), University of North Carolina Chapel Hill; Department of Medicine (S.P.J.), Beth Israel Deaconess Medical Center; Department of Surgery (C.W.H.), Johns Hopkins University School of Medicine; National Institute of Neurological Disorders and Stroke (R.F.G.); Department of Biostatistics (A.L.S.), Epidemiology, and Informatics, University of Pennsylvania Perelman School of Medicine; and Penn Injury Science Center (A.L.S.), University of Pennsylvania
| | - Priya Palta
- From the Department of Exercise Science (K.J.H.), Thomas Jefferson University; Department of Neurology (C.A.L., A.E.W., A.L.S.), University of Pennsylvania Perelman School of Medicine; Department of Neurology (H.E.), Hospital of the University of Pennsylvania; Memory Impairment and Neurodegenerative Dementia (MIND) Center (B.G.W.), University of Mississippi Medical Center; Department of Neurology (P.P.), University of North Carolina Chapel Hill; Department of Medicine (S.P.J.), Beth Israel Deaconess Medical Center; Department of Surgery (C.W.H.), Johns Hopkins University School of Medicine; National Institute of Neurological Disorders and Stroke (R.F.G.); Department of Biostatistics (A.L.S.), Epidemiology, and Informatics, University of Pennsylvania Perelman School of Medicine; and Penn Injury Science Center (A.L.S.), University of Pennsylvania
| | - Stephen P Juraschek
- From the Department of Exercise Science (K.J.H.), Thomas Jefferson University; Department of Neurology (C.A.L., A.E.W., A.L.S.), University of Pennsylvania Perelman School of Medicine; Department of Neurology (H.E.), Hospital of the University of Pennsylvania; Memory Impairment and Neurodegenerative Dementia (MIND) Center (B.G.W.), University of Mississippi Medical Center; Department of Neurology (P.P.), University of North Carolina Chapel Hill; Department of Medicine (S.P.J.), Beth Israel Deaconess Medical Center; Department of Surgery (C.W.H.), Johns Hopkins University School of Medicine; National Institute of Neurological Disorders and Stroke (R.F.G.); Department of Biostatistics (A.L.S.), Epidemiology, and Informatics, University of Pennsylvania Perelman School of Medicine; and Penn Injury Science Center (A.L.S.), University of Pennsylvania
| | - Caitlin W Hicks
- From the Department of Exercise Science (K.J.H.), Thomas Jefferson University; Department of Neurology (C.A.L., A.E.W., A.L.S.), University of Pennsylvania Perelman School of Medicine; Department of Neurology (H.E.), Hospital of the University of Pennsylvania; Memory Impairment and Neurodegenerative Dementia (MIND) Center (B.G.W.), University of Mississippi Medical Center; Department of Neurology (P.P.), University of North Carolina Chapel Hill; Department of Medicine (S.P.J.), Beth Israel Deaconess Medical Center; Department of Surgery (C.W.H.), Johns Hopkins University School of Medicine; National Institute of Neurological Disorders and Stroke (R.F.G.); Department of Biostatistics (A.L.S.), Epidemiology, and Informatics, University of Pennsylvania Perelman School of Medicine; and Penn Injury Science Center (A.L.S.), University of Pennsylvania
| | - Rebecca F Gottesman
- From the Department of Exercise Science (K.J.H.), Thomas Jefferson University; Department of Neurology (C.A.L., A.E.W., A.L.S.), University of Pennsylvania Perelman School of Medicine; Department of Neurology (H.E.), Hospital of the University of Pennsylvania; Memory Impairment and Neurodegenerative Dementia (MIND) Center (B.G.W.), University of Mississippi Medical Center; Department of Neurology (P.P.), University of North Carolina Chapel Hill; Department of Medicine (S.P.J.), Beth Israel Deaconess Medical Center; Department of Surgery (C.W.H.), Johns Hopkins University School of Medicine; National Institute of Neurological Disorders and Stroke (R.F.G.); Department of Biostatistics (A.L.S.), Epidemiology, and Informatics, University of Pennsylvania Perelman School of Medicine; and Penn Injury Science Center (A.L.S.), University of Pennsylvania
| | - Andrea L C Schneider
- From the Department of Exercise Science (K.J.H.), Thomas Jefferson University; Department of Neurology (C.A.L., A.E.W., A.L.S.), University of Pennsylvania Perelman School of Medicine; Department of Neurology (H.E.), Hospital of the University of Pennsylvania; Memory Impairment and Neurodegenerative Dementia (MIND) Center (B.G.W.), University of Mississippi Medical Center; Department of Neurology (P.P.), University of North Carolina Chapel Hill; Department of Medicine (S.P.J.), Beth Israel Deaconess Medical Center; Department of Surgery (C.W.H.), Johns Hopkins University School of Medicine; National Institute of Neurological Disorders and Stroke (R.F.G.); Department of Biostatistics (A.L.S.), Epidemiology, and Informatics, University of Pennsylvania Perelman School of Medicine; and Penn Injury Science Center (A.L.S.), University of Pennsylvania
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Xiang W, Xiang H, Wang J, Jiang Y, Pan C, Ji B, Zhang A. Fecal microbiota transplantation: a novel strategy for treating Alzheimer's disease. Front Microbiol 2023; 14:1281233. [PMID: 38033557 PMCID: PMC10687436 DOI: 10.3389/fmicb.2023.1281233] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Accepted: 10/31/2023] [Indexed: 12/02/2023] Open
Abstract
Alzheimer's disease is a common neurological disorder, which has become one of the major factors affecting human health due to its serious impact on individuals, families and society. It has been confirmed that gut microbiota can affect the occurrence and development of Alzheimer's disease. Especially, fecal microbiota transplantation plays a positive role in the treatment of Alzheimer's disease. The mechanisms for improving Alzheimer's disease might include anti-inflammation and regulation of amyloid β-protein, synaptic plasticity, short-chain fatty acids, and histone acetylation. In this mini-review, the relationship between fecal microbiota transplantation and Alzheimer's disease was summarized. It is hoped that fecal microbiota transplantation would play a positive role in the prevention and treatment of Alzheimer's disease in the future.
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Affiliation(s)
- Wu Xiang
- Department of Rehabilitation, Beibei Traditional Chinese Medical Hospital, Chongqing, China
- Department of Rehabilitation Medicine, Shanghai Fourth People’s Hospital Affiliated to Tongji University School of Medicine, Shanghai, China
| | - Han Xiang
- Department of Radiology, Daping Hospital, Army Medical University, Chongqing, China
| | - Junyu Wang
- Department of Rehabilitation Medicine, Shanghai Fourth People’s Hospital Affiliated to Tongji University School of Medicine, Shanghai, China
| | - Yiqin Jiang
- Department of Rehabilitation, Beibei Traditional Chinese Medical Hospital, Chongqing, China
| | - Chuanhui Pan
- Department of Rehabilitation, Beibei Traditional Chinese Medical Hospital, Chongqing, China
| | - Bingjin Ji
- Department of Rehabilitation, Beibei Traditional Chinese Medical Hospital, Chongqing, China
| | - Anren Zhang
- Department of Rehabilitation Medicine, Shanghai Fourth People’s Hospital Affiliated to Tongji University School of Medicine, Shanghai, China
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19
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Smolen P, Dash PK, Redell JB. Traumatic brain injury-associated epigenetic changes and the risk for neurodegenerative diseases. Front Neurosci 2023; 17:1259405. [PMID: 37795186 PMCID: PMC10546067 DOI: 10.3389/fnins.2023.1259405] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Accepted: 09/04/2023] [Indexed: 10/06/2023] Open
Abstract
Epidemiological studies have shown that traumatic brain injury (TBI) increases the risk for developing neurodegenerative diseases (NDs). However, molecular mechanisms that underlie this risk are largely unidentified. TBI triggers widespread epigenetic modifications. Similarly, NDs such as Alzheimer's or Parkinson's are associated with numerous epigenetic changes. Although epigenetic changes can persist after TBI, it is unresolved if these modifications increase the risk of later ND development and/or dementia. We briefly review TBI-related epigenetic changes, and point out putative feedback loops that might contribute to long-term persistence of some modifications. We then focus on evidence suggesting persistent TBI-associated epigenetic changes may contribute to pathological processes (e.g., neuroinflammation) which may facilitate the development of specific NDs - Alzheimer's disease, Parkinson's disease, or chronic traumatic encephalopathy. Finally, we discuss possible directions for TBI therapies that may help prevent or delay development of NDs.
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Affiliation(s)
- Paul Smolen
- Department of Neurobiology and Anatomy, McGovern Medical School, University of Texas Health Science Center, Houston, TX, United States
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20
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Zhao H, Wen Q, Zhuo L, Wang S, Zhan S. Association between Mobile Phone Use and Incidence of Dementia: A Prospective Cohort Study Using the UK Biobank. Gerontology 2023; 69:1232-1244. [PMID: 37494916 DOI: 10.1159/000531847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Accepted: 06/28/2023] [Indexed: 07/28/2023] Open
Abstract
INTRODUCTION The rapid growth in mobile phone use has led to public concern about its potential effects on the risk of dementia. This study aimed to investigate the association between mobile phone use in daily life and the risk of dementia incidence in community-dwelling adults based on the data from the UK Biobank. METHODS Participants in the UK Biobank aged 60 years or older with no diagnosis of dementia at the time of recruitment were included in this prospective cohort study. A Cox regression model adjusted for sociodemographic characteristics, general health factors, mental health, lifestyle factors, comorbidities, and medication use was used to estimate the hazard ratio (HR) and confidence interval (CI) of the association between mobile phone use and dementia risk. RESULTS The final analyses included 213,181 participants. During a median follow-up period of 12.4 years, 6,344 cases of incident dementia occurred. Mobile phone use displayed a modest association with lower risk of dementia incidence, with HRs of 0.85 (95% CI: 0.79-0.91), 0.85 (95% CI: 0.80-0.91), 0.78 (95% CI: 0.71-0.86), 0.86 (95% CI: 0.77-0.96), and 0.83 (95% CI: 0.70-0.98) for participants who reported phone call usage of fewer than 5 min, 5-29 min, 30-59 min, 1-3 h, and more than 3 h per week, respectively, compared with nonusers. In addition, the proportions of the association medicated by family/friend visits and other leisure/social activities were 2.62% (95% CI: -0.64-6.51) and 2.22% (95% CI: 1.12-4.12), respectively. CONCLUSIONS Daily mobile phone use is significantly associated with a reduced risk of incident dementia in community-dwelling adults in the UK Biobank population. This association seems to be mediated by improved social and mental activities.
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Affiliation(s)
- Houyu Zhao
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, China,
- Key Laboratory of Epidemiology of Major Diseases (Peking University), Ministry of Education, Beijing, China,
| | - Qiaorui Wen
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, China
- Key Laboratory of Epidemiology of Major Diseases (Peking University), Ministry of Education, Beijing, China
| | - Lin Zhuo
- Research Center of Clinical Epidemiology, Peking University Third Hospital, Beijing, China
| | - Shengfeng Wang
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, China
- Key Laboratory of Epidemiology of Major Diseases (Peking University), Ministry of Education, Beijing, China
| | - Siyan Zhan
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, China
- Key Laboratory of Epidemiology of Major Diseases (Peking University), Ministry of Education, Beijing, China
- Research Center of Clinical Epidemiology, Peking University Third Hospital, Beijing, China
- Center for Intelligent Public Health, Institute for Artificial Intelligence, Peking University, Beijing, China
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21
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Russell ER, Lyall DM, Stewart W. HEalth And Dementia outcomes following Traumatic Brain Injury (HEAD-TBI): protocol for a retrospective cohort study. BMJ Open 2023; 13:e073726. [PMID: 37491097 PMCID: PMC10373748 DOI: 10.1136/bmjopen-2023-073726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 07/27/2023] Open
Abstract
BACKGROUND It is estimated that by 2050 the global incidence of dementia will have exceeded 152 million. At present, there are no effective therapies for dementia, with a focus in research now turning to strategies for disease prevention. Traumatic brain injury (TBI) is recognised as a major risk factor for dementia; estimated to be responsible for at least 3% of cases in the community. However, adverse health outcomes after TBI are not restricted to dementia. A wide range of conditions are documented among TBI survivors, many of which also increase dementia risk. 'HEalth And Dementia outcomes following Traumatic Brain Injury' is a study aiming to explore the hypothesis that increased dementia risk following TBI reflects both the direct effect of the injury on the brain and the indirect effects of wider, adverse health outcomes associated with TBI which, in turn, increase dementia risk. METHODS AND ANALYSIS Comprehensive electronic medical and death certification records will be analysed for individuals with a documented history of TBI, compared with those of a matched general population control cohort with no documented TBI exposure. Cox proportional hazard regression models will be run to compare outcomes. Furthermore, existing diagnostic imaging and radiological reports for the cohort will be analysed to identify evidence of specific white matter abnormalities in TBI exposed individuals and their controls, and establish their potential diagnostic utility. ETHICS AND DISSEMINATION Approvals for the study have been obtained from the University of Glasgow College of Medical, Veterinary, and Life Sciences Research Ethics Committee (project number 200220038) and from National Health Service Scotland's Public Benefits and Privacy Panel (application 2122-0224). As results emerge, these will be presented at appropriate multidisciplinary research conferences and made available through open access platforms where possible.
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Affiliation(s)
| | - Donald M Lyall
- School of Health and Wellbeing, University of Glasgow, Glasgow, UK
| | - William Stewart
- School of Psychology and Neuroscience, University of Glasgow, Glasgow, UK
- Neuropathology Research Laboratory, NHS Greater Glasgow and Clyde, Glasgow, UK
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Patel PR, Armistead-Jehle P, Eltman NR, Heath KM, Cifu DX, Swanson RL. Brain Injury: How Dietary Patterns Impact Long-Term Outcomes. CURRENT PHYSICAL MEDICINE AND REHABILITATION REPORTS 2023; 11:367-376. [PMID: 37732170 PMCID: PMC10506931 DOI: 10.1007/s40141-023-00413-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/23/2023] [Indexed: 09/22/2023]
Abstract
Purpose of Review Individuals with a history of traumatic brain injury (TBI) are at a much greater risk for developing cardiovascular disease (CVD) compared to the general population. This review discusses dietary patterns as a means of addressing modifiable risk factors following TBI exposure. Evidence-based resources for practicing Physiatrists and Brain Injury Medicine specialists pertaining to nutrition education and counseling are also provided. Recent Findings We examined Mediterranean, Dietary Approaches to Stop Hypertension, plant-based, ketogenic, and intermittent fasting dietary patterns through publications of clinical trials and systematic reviews. While many reviews had significant positive findings, some were limited by generalizability. Summary While there is extensive literature on the immediate nutrition goals in the inpatient setting following an acute TBI exposure, there is limited literature discussing the nature of diet and nutrition in the post-acute setting. Fortunately, most individuals with TBI exposure survive their initial injury and continue into the recovery phase. The scientific literature supports increased morbidity and mortality with chronic TBI exposure compared to matched counterparts, most notably with CVD. A diet rich in fiber and nutrients but limited in added sugars, saturated fats, and excess calories would likely have the greatest cardiovascular and related neurologic protection. Future studies are needed to assess the specific impact of dietary interventions in the chronic phase of brain injury recovery.
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Affiliation(s)
- Palak R. Patel
- Department of Physical Medicine and Rehabilitation, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA USA
| | | | - Nicholas R. Eltman
- Corporal Michael J. Crescenz VA Medical Center, Center for Neurotrauma, Neurodegeneration, and Restoration, Philadelphia, PA USA
- Rowan-Virtua School of Osteopathic Medicine, Stratford, NJ USA
| | - Kelly M. Heath
- Department of Physical Medicine and Rehabilitation, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA USA
- Rehab Medicine Service, Corporal Michael J. Crescenz VA Medical Center, 3900 Woodland Avenue, Mail Stop #117, Philadelphia, PA 19104 USA
| | - David X. Cifu
- Physical Medicine and Rehabilitation, Virginia Commonwealth University School of Medicine, Richmond, USA
- Physical Medicine and Rehabilitation, Central Virginia Veterans Health Care System, Richmond, USA
| | - Randel L. Swanson
- Department of Physical Medicine and Rehabilitation, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA USA
- Corporal Michael J. Crescenz VA Medical Center, Center for Neurotrauma, Neurodegeneration, and Restoration, Philadelphia, PA USA
- Rehab Medicine Service, Corporal Michael J. Crescenz VA Medical Center, 3900 Woodland Avenue, Mail Stop #117, Philadelphia, PA 19104 USA
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23
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Mazzoleni E, Vinceti M, Costanzini S, Garuti C, Adani G, Vinceti G, Zamboni G, Tondelli M, Galli C, Salemme S, Teggi S, Chiari A, Filippini T. Outdoor artificial light at night and risk of early-onset dementia: A case-control study in the Modena population, Northern Italy. Heliyon 2023; 9:e17837. [PMID: 37455959 PMCID: PMC10339013 DOI: 10.1016/j.heliyon.2023.e17837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 05/15/2023] [Accepted: 06/28/2023] [Indexed: 07/18/2023] Open
Abstract
Background Dementia is a neurological syndrome characterized by severe cognitive impairment with functional impact on everyday life. It can be classified as young onset dementia (EOD) in case of symptom onset before 65, and late onset dementia (LOD). The purpose of this study is to assess the risk of dementia due to light pollution, and specifically outdoor artificial light at night (LAN). Methods Using a case-control design, we enrolled dementia patients newly-diagnosed in the province of Modena in the period 2017-2019 and a referent population from their caregivers. We geo-referenced the address of residence on the date of recruitment, provided it was stable for the previous five years. We assessed LAN exposure through 2015 nighttime luminance satellite images from the Visible Infrared Imaging Radiometer Suite (VIIRS). Using a logistic regression model adjusted for age, sex, and education, we calculated the risk of dementia associated with increasing LAN exposure, namely using <10 nW/cm2/sr as reference and considering ≥10-<40 nW/cm2/sr intermediate and ≥40 nW/cm2/sr high exposure, respectively We also implemented non-linear assessment using a spline regression model. Results We recruited 58 EOD cases, 34 LOD cases and 54 controls. Average LAN exposure levels overlapped for EOD cases and controls, while LOD cases showed higher levels. Compared with the lowest exposure, the risk of EOD associated with LAN was higher in the intermediate exposure (OR = 1.36, 95% CI 0.54-3.39), but not in the high exposure category (OR = 1.04, 95% CI 0.32-3.34). In contrast, the risk of LOD was positively associated with LAN exposure, with ORs of 2.58 (95% CI 0.26-25.97) and 3.50 (95% CI 0.32-38.87) in the intermediate and high exposure categories, respectively. The spline regression analysis showed substantial lack of association between LAN and EOD, while almost linear although highly imprecise association emerged for LOD. Conclusions Although the precision of the estimates was affected by the limited sample size and the study design did not allow us to exclude the presence of residual confounding, these results suggest a possible role of LAN in the etiology of dementia, particularly of its late-onset form.
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Affiliation(s)
- Elena Mazzoleni
- Environmental, Genetic and Nutritional Epidemiology Research Center (CREAGEN), Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Marco Vinceti
- Environmental, Genetic and Nutritional Epidemiology Research Center (CREAGEN), Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
- Department of Epidemiology, Boston University School of Public Health, Boston, MA, USA
| | - Sofia Costanzini
- DIEF Department of Engineering “Enzo Ferrari”, University of Modena and Reggio Emilia, Modena, Italy
| | - Caterina Garuti
- Environmental, Genetic and Nutritional Epidemiology Research Center (CREAGEN), Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
- Department of Medical and Surgical Sciences for Mothers, Children and Adults, Post Graduate School of Pediatrics, University of Modena and Reggio Emilia, Modena, Italy
| | - Giorgia Adani
- Environmental, Genetic and Nutritional Epidemiology Research Center (CREAGEN), Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Giulia Vinceti
- Department Center for Neurosciences and Neurotechnology, Department of Biomedical, Metabolic, and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
- Neurology Unit, Modena Policlinico-University Hospital, Modena, Italy
| | - Giovanna Zamboni
- Department Center for Neurosciences and Neurotechnology, Department of Biomedical, Metabolic, and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
- Neurology Unit, Modena Policlinico-University Hospital, Modena, Italy
| | - Manuela Tondelli
- Neurology Unit, Modena Policlinico-University Hospital, Modena, Italy
- Primary Care Department, Modena Local Health Authority, Modena, Italy
| | - Chiara Galli
- Neurology Unit, Modena Policlinico-University Hospital, Modena, Italy
- Primary Care Department, Modena Local Health Authority, Modena, Italy
- Department of Neuroscience, Psychology, Pharmacology and Child Health (NeuroFARBA), University of Florence, Florence, Italy
| | - Simone Salemme
- Department Center for Neurosciences and Neurotechnology, Department of Biomedical, Metabolic, and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
- Neurology Unit, Modena Policlinico-University Hospital, Modena, Italy
| | - Sergio Teggi
- DIEF Department of Engineering “Enzo Ferrari”, University of Modena and Reggio Emilia, Modena, Italy
| | - Annalisa Chiari
- Neurology Unit, Modena Policlinico-University Hospital, Modena, Italy
| | - Tommaso Filippini
- Environmental, Genetic and Nutritional Epidemiology Research Center (CREAGEN), Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
- School of Public Health, University of California Berkeley, Berkeley, CA, USA
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Graham NS, Cole JH, Bourke NJ, Schott JM, Sharp DJ. Distinct patterns of neurodegeneration after TBI and in Alzheimer's disease. Alzheimers Dement 2023; 19:3065-3077. [PMID: 36696255 PMCID: PMC10955776 DOI: 10.1002/alz.12934] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 12/17/2022] [Accepted: 12/20/2022] [Indexed: 01/26/2023]
Abstract
INTRODUCTION Traumatic brain injury (TBI) is a dementia risk factor, with Alzheimer's disease (AD) more common following injury. Patterns of neurodegeneration produced by TBI can be compared to AD and aging using volumetric MRI. METHODS A total of 55 patients after moderate to severe TBI (median age 40), 45 with AD (median age 69), and 61 healthy volunteers underwent magnetic resonance imaging over 2 years. Atrophy patterns were compared. RESULTS AD patients had markedly lower baseline volumes. TBI was associated with increased white matter (WM) atrophy, particularly involving corticospinal tracts and callosum, whereas AD rates were increased across white and gray matter (GM). Subcortical WM loss was shared in AD/TBI, but deep WM atrophy was TBI-specific and cortical atrophy AD-specific. Post-TBI atrophy patterns were distinct from aging, which resembled AD. DISCUSSION Post-traumatic neurodegeneration 1.9-4.0 years (median) following moderate-severe TBI is distinct from aging/AD, predominantly involving central WM. This likely reflects distributions of axonal injury, a neurodegeneration trigger. HIGHLIGHTS We compared patterns of brain atrophy longitudinally after moderate to severe TBI in late-onset AD and healthy aging. Patients after TBI had abnormal brain atrophy involving the corpus callosum and other WM tracts, including corticospinal tracts, in a pattern that was specific and distinct from AD and aging. This pattern is reminiscent of axonal injury following TBI, and atrophy rates were predicted by the extent of axonal injury on diffusion tensor imaging, supporting a relationship between early axonal damage and chronic neurodegeneration.
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Affiliation(s)
- Neil S.N. Graham
- Department of Brain SciencesImperial College LondonLondonUK
- UK Dementia Research Institute Centre for Care Research and Technology at Imperial College LondonLondonUK
| | - James H. Cole
- Dementia Research CentreUCL Queen Square Institute of NeurologyLondonUK
- Centre for Medical Image ComputingUCLLondonUK
| | - Niall J. Bourke
- Department of Brain SciencesImperial College LondonLondonUK
- UK Dementia Research Institute Centre for Care Research and Technology at Imperial College LondonLondonUK
| | | | - David J. Sharp
- Department of Brain SciencesImperial College LondonLondonUK
- UK Dementia Research Institute Centre for Care Research and Technology at Imperial College LondonLondonUK
- Centre for Injury StudiesImperial College LondonLondonUK
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25
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Moore M, Sandsmark DK. Clinical Updates in Mild Traumatic Brain Injury (Concussion). Neuroimaging Clin N Am 2023; 33:271-278. [PMID: 36965945 DOI: 10.1016/j.nic.2023.01.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Traumatic brain injury (TBI) affects > 3 million people in the United States annually. Although the number of deaths related to severe TBIs has stabalized, mild TBIs, often termed concussions, are increasing. As evidence indicates that a significant proportion of these mild injuries are associated with long-lasting functional deficits that impact work performance, social integration, and may predispose to later cognitive decline, it is important that we (a) recognize these injuries, (b) identify those at highest risk of poor recovery, and (c) initiate appropriate treatments promptly. We discuss the epidemiology of TBI, the most common persistent symptoms, and treatment approaches.
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Affiliation(s)
- Megan Moore
- Department of Neurology, University of Pennsylvania Perelman School of Medicine, 51 North 39th Street, Andrew Mutch Building 4th Floor, Philadelphia, PA 19104, USA
| | - Danielle K Sandsmark
- Department of Neurology, Division of Neurocritical Care, University of Pennsylvania Perelman School of Medicine, 51 North 39th Street, Medical Office Building Suite 205, Philadelphia, PA 19104, USA.
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Abstract
This article describes the public health impact of Alzheimer's disease, including prevalence and incidence, mortality and morbidity, use and costs of care, and the overall impact on family caregivers, the dementia workforce and society. The Special Report examines the patient journey from awareness of cognitive changes to potential treatment with drugs that change the underlying biology of Alzheimer's. An estimated 6.7 million Americans age 65 and older are living with Alzheimer's dementia today. This number could grow to 13.8 million by 2060 barring the development of medical breakthroughs to prevent, slow or cure AD. Official death certificates recorded 121,499 deaths from AD in 2019, and Alzheimer's disease was officially listed as the sixth-leading cause of death in the United States. In 2020 and 2021, when COVID-19 entered the ranks of the top ten causes of death, Alzheimer's was the seventh-leading cause of death. Alzheimer's remains the fifth-leading cause of death among Americans age 65 and older. Between 2000 and 2019, deaths from stroke, heart disease and HIV decreased, whereas reported deaths from AD increased more than 145%. This trajectory of deaths from AD was likely exacerbated by the COVID-19 pandemic in 2020 and 2021. More than 11 million family members and other unpaid caregivers provided an estimated 18 billion hours of care to people with Alzheimer's or other dementias in 2022. These figures reflect a decline in the number of caregivers compared with a decade earlier, as well as an increase in the amount of care provided by each remaining caregiver. Unpaid dementia caregiving was valued at $339.5 billion in 2022. Its costs, however, extend to family caregivers' increased risk for emotional distress and negative mental and physical health outcomes - costs that have been aggravated by COVID-19. Members of the paid health care workforce are involved in diagnosing, treating and caring for people with dementia. In recent years, however, a shortage of such workers has developed in the United States. This shortage - brought about, in part, by COVID-19 - has occurred at a time when more members of the dementia care workforce are needed. Therefore, programs will be needed to attract workers and better train health care teams. Average per-person Medicare payments for services to beneficiaries age 65 and older with AD or other dementias are almost three times as great as payments for beneficiaries without these conditions, and Medicaid payments are more than 22 times as great. Total payments in 2023 for health care, long-term care and hospice services for people age 65 and older with dementia are estimated to be $345 billion. The Special Report examines whether there will be sufficient numbers of physician specialists to provide Alzheimer's care and treatment now that two drugs are available that change the underlying biology of Alzheimer's disease.
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Weiner MW, Harvey D, Landau SM, Veitch DP, Neylan TC, Grafman JH, Aisen PS, Petersen RC, Jack CR, Tosun D, Shaw LM, Trojanowski JQ, Saykin AJ, Hayes J, De Carli C. Traumatic brain injury and post-traumatic stress disorder are not associated with Alzheimer's disease pathology measured with biomarkers. Alzheimers Dement 2023; 19:884-895. [PMID: 35768339 PMCID: PMC10269599 DOI: 10.1002/alz.12712] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2021] [Revised: 05/08/2022] [Accepted: 05/13/2022] [Indexed: 11/06/2022]
Abstract
INTRODUCTION Epidemiological studies report an association between traumatic brain injury (TBI) and post-traumatic stress disorder (PTSD) and clinically diagnosed Alzheimer's disease (AD). We examined the association between TBI/PTSD and biomarker-defined AD. METHODS We identified 289 non-demented veterans with TBI and/or PTSD and controls who underwent clinical evaluation, cerebrospinal fluid (CSF) collection, magnetic resonance imaging (MRI), amyloid beta (Aβ) and tau positron emission tomography, and apolipoprotein E testing. Participants were followed for up to 5.2 years. RESULTS Exposure groups (TBI, PTSD, and TBI + PTSD) had higher prevalence of mild cognitive impairment (MCI: P < .0001) and worse Mini-Mental State Examination scores (PTSD: P = .008; TBI & PTSD: P = .009) than controls. There were no significant differences in other cognitive scores, MRI volumes, Aβ or tau accumulation, or in most longitudinal measures. DISCUSSION TBI and/or PTSD were not associated with elevated AD biomarkers. The poorer cognitive status of exposed veterans may be due to other comorbid pathologies.
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Affiliation(s)
- Michael W Weiner
- Department of Veterans Affairs Medical Center, Center for Imaging of Neurodegenerative Diseases, San Francisco, California, USA
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, California, USA
- Department of Medicine, University of California, San Francisco, San Francisco, California, USA
- Department of Psychiatry, University of California, San Francisco, San Francisco, California, USA
- Department of Neurology, University of California, San Francisco, San Francisco, California, USA
| | - Danielle Harvey
- Division of Biostatistics, Department of Public Health Sciences, University of California, Davis, Davis, California, USA
| | - Susan M Landau
- Helen Wills Neuroscience Institute, University of California Berkeley, Berkeley, California, USA
| | - Dallas P Veitch
- Department of Veterans Affairs Medical Center, Center for Imaging of Neurodegenerative Diseases, San Francisco, California, USA
- Northern California Institute for Research and Education (NCIRE), Department of Veterans Affairs Medical Center, San Francisco, California, USA
| | - Thomas C Neylan
- Department of Psychiatry, University of California, San Francisco, San Francisco, California, USA
- Department of Neurology, University of California, San Francisco, San Francisco, California, USA
| | - Jordan H Grafman
- Shirley Ryan AbilityLab, Northwestern University School of Medicine, Chicago, Illinois, USA
| | - Paul S Aisen
- Alzheimer's Therapeutic Research Institute, University of Southern California, San Diego, La Jolla, California, USA
| | | | - Clifford R Jack
- Department of Radiology, Mayo Clinic, Rochester, Minnesota, USA
| | - Duygu Tosun
- Department of Veterans Affairs Medical Center, Center for Imaging of Neurodegenerative Diseases, San Francisco, California, USA
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, California, USA
| | - Leslie M Shaw
- Department of Pathology and Laboratory Medicine, Center for Neurodegenerative Research, School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - John Q Trojanowski
- Department of Pathology and Laboratory Medicine, Center for Neurodegenerative Research, School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Andrew J Saykin
- Department of Radiology and Imaging Sciences and Indiana Alzheimer's Disease Research Center, Indiana University School of Medicine, Indianapolis, Indiana, USA
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Jacqueline Hayes
- Department of Veterans Affairs Medical Center, Center for Imaging of Neurodegenerative Diseases, San Francisco, California, USA
- Northern California Institute for Research and Education (NCIRE), Department of Veterans Affairs Medical Center, San Francisco, California, USA
| | - Charles De Carli
- Department of Neurology and Center for Neuroscience, University of California Davis, Davis, California, USA
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Grasset L, Power MC, Crivello F, Tzourio C, Chêne G, Dufouil C. How Traumatic Brain Injury History Relates to Brain Health MRI Markers and Dementia Risk: Findings from the 3C Dijon Cohort. J Alzheimers Dis 2023; 92:183-193. [PMID: 36710672 PMCID: PMC10041415 DOI: 10.3233/jad-220658] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
BACKGROUND The long-term effects of traumatic brain injury (TBI) with loss of consciousness (LOC) on magnetic resonance imaging (MRI) markers of brain health and on dementia risk are still debated. OBJECTIVE To investigate the associations of history of TBI with LOC with incident dementia and neuroimaging markers of brain structure and small vessel disease lesions. METHODS The analytical sample consisted in 4,144 participants aged 65 and older who were dementia-free at baseline from the Three City -Dijon study. History of TBI with LOC was self-reported at baseline. Clinical Dementia was assessed every two to three years, up to 12 years of follow-up. A subsample of 1,675 participants <80 years old underwent a brain MRI at baseline. We investigated the associations between history of TBI with LOC and 1) incident all cause and Alzheimer's disease (AD) dementia using illness-death models, and 2) neuroimaging markers at baseline. RESULTS At baseline, 8.3% of the participants reported a history of TBI with LOC. In fully-adjusted models, participants with a history of TBI with LOC had no statistically significant differences in dementia risk (HR = 0.90, 95% CI = 0.60-1.36) or AD risk (HR = 1.03, 95% CI = 0.69-1.52), compared to participants without TBI history. History of TBI with LOC was associated with lower white matter volume (β= -4.58, p = 0.048), but not with other brain volumes, white matter hyperintensities volume, nor covert brain infarct. CONCLUSION This study did not find evidence of an association between history of TBI with LOC and dementia or AD dementia risks over 12-year follow-up, brain atrophy, or markers of small vessel disease.
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Affiliation(s)
- Leslie Grasset
- University of Bordeaux, Inserm, Bordeaux Population Health Research Center, UMR 1219; CIC1401-EC, Bordeaux, France
| | - Melinda C Power
- Department of Epidemiology, Milken Institute School of Public Health, George Washington University, Washington, DC, USA
| | | | - Christophe Tzourio
- University of Bordeaux, Inserm, Bordeaux Population Health Research Center, UMR 1219; Bordeaux, France
| | - Geneviève Chêne
- University of Bordeaux, Inserm, Bordeaux Population Health Research Center, UMR 1219; CIC1401-EC, Bordeaux, France.,Pole de sante publique Centre Hospitalier Universitaire (CHU) de Bordeaux, Bordeaux, France
| | - Carole Dufouil
- University of Bordeaux, Inserm, Bordeaux Population Health Research Center, UMR 1219; CIC1401-EC, Bordeaux, France.,Pole de sante publique Centre Hospitalier Universitaire (CHU) de Bordeaux, Bordeaux, France
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29
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Chaychi S, Valera E, Tartaglia MC. Sex and gender differences in mild traumatic brain injury/concussion. INTERNATIONAL REVIEW OF NEUROBIOLOGY 2022; 164:349-375. [PMID: 36038209 DOI: 10.1016/bs.irn.2022.07.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The high incidence of concussions/mild traumatic brain injury and the significant number of people with persisting concussion symptoms as well as the concern for delayed, neurodegenerative effects of concussions makes them a major public health concern. There is much to learn on concussions with respect to pathophysiology as well as vulnerability and resiliency factors. The heterogeneity in outcome after a concussion warrants a more personalized approach to better understand the biological and psychosocial factors that may affect outcome. In this chapter we address biological sex and gender as they impact different aspects of concussion including incidence, risk factors and outcome. As well, this chapter will provide a more fulsome overview of intimate partner violence, an often-overlooked cause of concussion in women. Applying the sex and gender lens to concussion/mild traumatic brain injury is imperative for discovery of its pathophysiology and moving closer to treatments.
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Affiliation(s)
- Samaneh Chaychi
- Memory Clinic, Krembil Brain Institute, University Health Network, Toronto, ON, Canada; Canadian Concussion Centre, Krembil Brain Institute, University Health Network, Toronto, ON, Canada
| | - Eve Valera
- Department of Psychiatry, Harvard Medical School, Boston, MA, United States; Department of Psychiatry, Massachusetts General Hospital, Charlestown, MA, United States
| | - Maria Carmela Tartaglia
- Memory Clinic, Krembil Brain Institute, University Health Network, Toronto, ON, Canada; Canadian Concussion Centre, Krembil Brain Institute, University Health Network, Toronto, ON, Canada; Tanz Centre for Research in Neurodegenerative Diseases, University of Toronto, Toronto, ON, Canada.
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Raj R, Kaprio J, Jousilahti P, Korja M, Siironen J. Risk of Dementia After Hospitalization Due to Traumatic Brain Injury: A Longitudinal Population-Based Study. Neurology 2022; 98:e2377-e2386. [PMID: 35545443 DOI: 10.1212/wnl.0000000000200290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 02/10/2022] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND AND OBJECTIVES Traumatic brain injury (TBI) is considered a potential modifiable dementia risk factor. We aimed to determine whether TBI actually increases the risk of dementia when adjusting for other relevant dementia risk factors. METHODS This was a national prospective longitudinal cohort study that included random and representative population samples from different parts of Finland of patients 25 through 64 years of age from 1992 to 2012. Major TBI was defined as a diagnosis of traumatic intracranial hemorrhage and hospital length of stay (LOS) ≥3 days and minor TBI was defined as a diagnosis of concussion and hospital LOS ≤1 day. Dementia was defined as any first hospital contact with a diagnosis of dementia, first use of an antidementia drug, or dementia as an underlying or contributing cause of death. Follow-up was until death or end of 2017. RESULTS Of 31,909 participants, 288 were hospitalized due to a major TBI and 406 were hospitalized due to a minor TBI. There was a total of 976 incident dementia cases during a median follow-up of 15.8 years. After adjusting for age and sex, hospitalization due to major TBI (hazard ratio [HR] 1.51, 95% CI 1.03-2.22), but not minor TBI, increased the risk of dementia. After additional adjustment for educational status, smoking status, alcohol consumption, physical activity, and hypertension, the association between major TBI and dementia weakened (HR 1.30, 95% CI 0.86-1.97). The risk factors most strongly attenuating the association between major TBI and dementia were alcohol consumption and physical activity. DISCUSSION There was an association between hospitalized major TBI and incident dementia. The association was diluted after adjusting for confounders, especially alcohol consumption and physical activity. Hospitalization due to minor TBI was not associated with an increased risk of dementia. CLASSIFICATION OF EVIDENCE This study provides Class I evidence that major TBI is associated with incident dementia.
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Affiliation(s)
- Rahul Raj
- From the Department of Neurosurgery (R.R., M.K., J.S.), Helsinki University Hospital and University of Helsinki; Institute for Molecular Medicine Finland (J.K.), University of Helsinki; and Department of Public Health and Welfare (P.J.), Finnish Institute for Health and Welfare, Helsinki, Finland.
| | - Jaakko Kaprio
- From the Department of Neurosurgery (R.R., M.K., J.S.), Helsinki University Hospital and University of Helsinki; Institute for Molecular Medicine Finland (J.K.), University of Helsinki; and Department of Public Health and Welfare (P.J.), Finnish Institute for Health and Welfare, Helsinki, Finland
| | - Pekka Jousilahti
- From the Department of Neurosurgery (R.R., M.K., J.S.), Helsinki University Hospital and University of Helsinki; Institute for Molecular Medicine Finland (J.K.), University of Helsinki; and Department of Public Health and Welfare (P.J.), Finnish Institute for Health and Welfare, Helsinki, Finland
| | - Miikka Korja
- From the Department of Neurosurgery (R.R., M.K., J.S.), Helsinki University Hospital and University of Helsinki; Institute for Molecular Medicine Finland (J.K.), University of Helsinki; and Department of Public Health and Welfare (P.J.), Finnish Institute for Health and Welfare, Helsinki, Finland
| | - Jari Siironen
- From the Department of Neurosurgery (R.R., M.K., J.S.), Helsinki University Hospital and University of Helsinki; Institute for Molecular Medicine Finland (J.K.), University of Helsinki; and Department of Public Health and Welfare (P.J.), Finnish Institute for Health and Welfare, Helsinki, Finland
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Swanson RL, Acharya NK, Cifu DX. Cerebral Microvascular Pathology Is a Common Endophenotype Between Traumatic Brain Injury, Cardiovascular Disease, and Dementia: A Hypothesis and Review. Cureus 2022; 14:e25318. [PMID: 35774720 PMCID: PMC9236636 DOI: 10.7759/cureus.25318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/24/2022] [Indexed: 11/05/2022] Open
Abstract
Traumatic brain injury (TBI) exposure has been associated with an increased risk of age-related cognitive decline or dementia in multiple epidemiological studies. Current therapeutic interventions in the field of Brain Injury Medicine focus largely on episodic symptom management during the chronic phase of TBI recovery, rather than targeting specific underlying pathological processes. This approach may be especially problematic for secondary age-related cognitive decline or dementia following TBI exposure. Although there are likely multiple pathophysiological mechanisms involved, a growing body of literature demonstrates that cerebral microvascular pathology is a common endophenotype across the spectrum of TBI severity. Similarly, a combination of pre-clinical and clinical research over the past two decades has implicated cerebral microvascular pathology in the initiation and progression of multiple neurodegenerative diseases, including Alzheimer’s disease and other dementias. We hypothesize that cerebral microvascular pathology is a common endophenotype between TBI, cardiovascular disease (CVD), and dementia, which can be targeted through modifiable cardiovascular risk factor reductions during the chronic phase of TBI recovery. We posit that our hypothesis is supported by the currently available scientific literature, as detailed in our review.
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Folate Related Pathway Gene Analysis Reveals a Novel Metabolic Variant Associated with Alzheimer’s Disease with a Change in Metabolic Profile. Metabolites 2022; 12:metabo12060475. [PMID: 35736408 PMCID: PMC9230919 DOI: 10.3390/metabo12060475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 05/20/2022] [Accepted: 05/20/2022] [Indexed: 11/30/2022] Open
Abstract
Metabolic disorders may be important potential causative pathways to Alzheimer’s disease (AD). Cerebrospinal fluid (CSF) decreasing output, raised intracranial pressure, and ventricular enlargement have all been linked to AD. Cerebral folate metabolism may be a key player since this is significantly affected by such changes in CSF, and genetic susceptibilities may exist in this pathway. In the current study, we aimed to identify whether any single nucleotide polymorphism (SNPs) affecting folate and the associated metabolic pathways were significantly associated with AD. We took a functional nutrigenomics approach to look for SNPs in genes for the linked folate, methylation, and biogenic amine neurotransmitter pathways. Changes in metabolism were found with the SNPs identified. An abnormal SNP in methylene tetrahydrofolate dehydrogenase 1 (MTHFD1) was significantly predictive of AD and associated with an increase in tissue glutathione. Individuals without these SNPs had normal levels of glutathione but significantly raised MTHFD1. Both changes would serve to decrease potentially neurotoxic levels of homocysteine. Seven additional genes were associated with Alzheimer’s and five with normal ageing. MTHFD1 presents a strong prediction of susceptibility and disease among the SNPs associated with AD. Associated physiological changes present potential biomarkers for identifying at-risk individuals.
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De Felice FG, Gonçalves RA, Ferreira ST. Impaired insulin signalling and allostatic load in Alzheimer disease. Nat Rev Neurosci 2022; 23:215-230. [DOI: 10.1038/s41583-022-00558-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/17/2022] [Indexed: 12/14/2022]
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Blood Biomarkers in Brain Injury Medicine. CURRENT PHYSICAL MEDICINE AND REHABILITATION REPORTS 2022; 2022:10.1007/s40141-022-00343-w. [PMID: 35433117 PMCID: PMC9009302 DOI: 10.1007/s40141-022-00343-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Purpose of Review This review seeks to explore blood-based biomarkers with the potential for clinical implementation. Recent Findings Emerging non-proteomic biomarkers hold promise for more accurate diagnostic and prognostic capabilities, especially in the subacute to chronic phase of TBI recovery. Further, there is a growing understanding of the overlap between TBI-related and Dementia-related blood biomarkers. Summary Given the significant heterogeneity inherent in the clinical diagnosis of Traumatic Brain Injury (TBI), there has been an exponential increase in TBI-related biomarker research over the past two decades. While TBI-related biomarker assessments include both cerebrospinal fluid analysis and advanced neuroimaging modalities, blood-based biomarkers hold the most promise to be non-invasive biomarkers widely available to Brain Injury Medicine clinicians in diverse practice settings. In this article, we review the most relevant blood biomarkers for the field of Brain Injury Medicine, including both proteomic and non-proteomic blood biomarkers, biomarkers of cerebral microvascular injury, and biomarkers that overlap between TBI and Dementia.
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Schneider ALC, Gottesman RF, Krauss GL, Gugger J, Diaz-Arrastia R, Kucharska-Newton A, Huang J, Johnson EL. Association of Head Injury With Late-Onset Epilepsy: Results From the Atherosclerosis Risk in Communities Cohort. Neurology 2022; 98:e808-e817. [PMID: 34921108 PMCID: PMC8883511 DOI: 10.1212/wnl.0000000000013214] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Accepted: 11/30/2021] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND AND OBJECTIVES Late-onset epilepsy (LOE; i.e., epilepsy starting in later adulthood) affects a significant number of individuals. Head injury is also a risk factor for acquired epilepsy, but the degree to which prior head injury may contribute to LOE is less well understood. Our objective was to determine the association between head injury and subsequent development of LOE. METHODS Included were 8,872 participants enrolled in the Atherosclerosis Risk in Communities (ARIC) study with continuous Centers for Medicare Services fee-for-service (FFS) coverage (55.1% women, 21.6% Black). We identified head injuries through 2018 from linked Medicare fee for service claims for inpatient/emergency department care, active surveillance of hospitalizations, and participant self-report. LOE cases through 2018 were identified from linked Medicare FFS claims. We used Cox proportional hazards models to evaluate associations of head injury with LOE, adjusting for demographic, cardiovascular, and lifestyle factors. RESULTS The adjusted hazard ratio (HR) for developing LOE after a history of head injury was 1.88 (95% confidence interval [CI] 1.44-2.43). There was evidence for dose-response associations with greater risk for LOE with increasing number of prior head injuries (HR 1.37, 95% CI 1.01-1.88 for 1 prior head injury and HR 3.55, 95% CI 2.51-5.02 for 2+ prior head injuries, compared to no head injuries) and with more severe head injury (HR 2.53, 95% CI 1.83-3.49 for mild injury and HR 4.90, 95% CI 3.15-7.64 for moderate/severe injury, compared to no head injuries). Associations with LOE were significant for head injuries sustained at older age (age ≥67 years: HR 4.01, 95% CI 2.91-5.54), but not for head injuries sustained at younger age (age < 67 years: HR 0.98, 95% CI 0.68-1.41). DISCUSSION Head injury was associated with increased risk of developing LOE, particularly when head injuries were sustained at an older age, and there was evidence for higher risk for LOE after a greater number of prior head injuries and after more severe head injuries. CLASSIFICATION OF EVIDENCE This study provides Class I evidence that an increased risk of late-onset epilepsy is associated with head injury and that this risk increases further with multiple and more severe head injuries.
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Affiliation(s)
- Andrea L C Schneider
- From the Department of Neurology (A.L.C.S., J.G., R.D.-A.), University of Pennsylvania Perelman School of Medicine, Philadelphia; Stroke Branch (R.F.G.), National Institutes of Neurological Disorders and Stroke Intramural Research Program, Bethesda; Department of Neurology (G.L.K., E.L.J.), Johns Hopkins University School of Medicine, Baltimore, MD; Department of Epidemiology (A.K.-N.), University of North Carolina at Chapel Hill; Department of Epidemiology (A.K.-N.), University of Kentucky, Lexington; and Department of Neurology (J.H.), University of Mississippi Medical Center, Jackson.
| | - Rebecca F Gottesman
- From the Department of Neurology (A.L.C.S., J.G., R.D.-A.), University of Pennsylvania Perelman School of Medicine, Philadelphia; Stroke Branch (R.F.G.), National Institutes of Neurological Disorders and Stroke Intramural Research Program, Bethesda; Department of Neurology (G.L.K., E.L.J.), Johns Hopkins University School of Medicine, Baltimore, MD; Department of Epidemiology (A.K.-N.), University of North Carolina at Chapel Hill; Department of Epidemiology (A.K.-N.), University of Kentucky, Lexington; and Department of Neurology (J.H.), University of Mississippi Medical Center, Jackson
| | - Gregory L Krauss
- From the Department of Neurology (A.L.C.S., J.G., R.D.-A.), University of Pennsylvania Perelman School of Medicine, Philadelphia; Stroke Branch (R.F.G.), National Institutes of Neurological Disorders and Stroke Intramural Research Program, Bethesda; Department of Neurology (G.L.K., E.L.J.), Johns Hopkins University School of Medicine, Baltimore, MD; Department of Epidemiology (A.K.-N.), University of North Carolina at Chapel Hill; Department of Epidemiology (A.K.-N.), University of Kentucky, Lexington; and Department of Neurology (J.H.), University of Mississippi Medical Center, Jackson
| | - James Gugger
- From the Department of Neurology (A.L.C.S., J.G., R.D.-A.), University of Pennsylvania Perelman School of Medicine, Philadelphia; Stroke Branch (R.F.G.), National Institutes of Neurological Disorders and Stroke Intramural Research Program, Bethesda; Department of Neurology (G.L.K., E.L.J.), Johns Hopkins University School of Medicine, Baltimore, MD; Department of Epidemiology (A.K.-N.), University of North Carolina at Chapel Hill; Department of Epidemiology (A.K.-N.), University of Kentucky, Lexington; and Department of Neurology (J.H.), University of Mississippi Medical Center, Jackson
| | - Ramon Diaz-Arrastia
- From the Department of Neurology (A.L.C.S., J.G., R.D.-A.), University of Pennsylvania Perelman School of Medicine, Philadelphia; Stroke Branch (R.F.G.), National Institutes of Neurological Disorders and Stroke Intramural Research Program, Bethesda; Department of Neurology (G.L.K., E.L.J.), Johns Hopkins University School of Medicine, Baltimore, MD; Department of Epidemiology (A.K.-N.), University of North Carolina at Chapel Hill; Department of Epidemiology (A.K.-N.), University of Kentucky, Lexington; and Department of Neurology (J.H.), University of Mississippi Medical Center, Jackson
| | - Anna Kucharska-Newton
- From the Department of Neurology (A.L.C.S., J.G., R.D.-A.), University of Pennsylvania Perelman School of Medicine, Philadelphia; Stroke Branch (R.F.G.), National Institutes of Neurological Disorders and Stroke Intramural Research Program, Bethesda; Department of Neurology (G.L.K., E.L.J.), Johns Hopkins University School of Medicine, Baltimore, MD; Department of Epidemiology (A.K.-N.), University of North Carolina at Chapel Hill; Department of Epidemiology (A.K.-N.), University of Kentucky, Lexington; and Department of Neurology (J.H.), University of Mississippi Medical Center, Jackson
| | - Juebin Huang
- From the Department of Neurology (A.L.C.S., J.G., R.D.-A.), University of Pennsylvania Perelman School of Medicine, Philadelphia; Stroke Branch (R.F.G.), National Institutes of Neurological Disorders and Stroke Intramural Research Program, Bethesda; Department of Neurology (G.L.K., E.L.J.), Johns Hopkins University School of Medicine, Baltimore, MD; Department of Epidemiology (A.K.-N.), University of North Carolina at Chapel Hill; Department of Epidemiology (A.K.-N.), University of Kentucky, Lexington; and Department of Neurology (J.H.), University of Mississippi Medical Center, Jackson
| | - Emily L Johnson
- From the Department of Neurology (A.L.C.S., J.G., R.D.-A.), University of Pennsylvania Perelman School of Medicine, Philadelphia; Stroke Branch (R.F.G.), National Institutes of Neurological Disorders and Stroke Intramural Research Program, Bethesda; Department of Neurology (G.L.K., E.L.J.), Johns Hopkins University School of Medicine, Baltimore, MD; Department of Epidemiology (A.K.-N.), University of North Carolina at Chapel Hill; Department of Epidemiology (A.K.-N.), University of Kentucky, Lexington; and Department of Neurology (J.H.), University of Mississippi Medical Center, Jackson
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Kamath V, Senjem ML, Spychalla AJ, Chen H, Palta P, Mosley TH, Windham BG, Griswold M, Knopman DS, Gottesman RF, Jack CR, Sharrett AR, Schneider AL. The Neuroanatomic Correlates of Olfactory Identification Impairment in Healthy Older Adults and in Persons with Mild Cognitive Impairment. J Alzheimers Dis 2022; 89:233-245. [PMID: 35871337 PMCID: PMC10134400 DOI: 10.3233/jad-220228] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
BACKGROUND Olfactory identification (OI) impairment appears early in the course of Alzheimer's disease dementia (AD), prior to detectable cognitive impairment. However, the neuroanatomical correlates of impaired OI in cognitively normal older adults (CN) and persons with mild cognitive impairment (MCI) are not fully understood. OBJECTIVE We examined the neuroanatomic correlates of OI impairment in older adults from the Atherosclerosis Risk in Communities Neurocognitive Study (ARIC-NCS). METHODS Our sample included 1,600 older adults without dementia who completed clinical assessment and structural brain imaging from 2011 to 2013. We characterized OI impairment using the 12-item Sniffin' Sticks odor identification test (score ≤6). We used voxel-based morphometry (VBM) and region of interest (ROI) analyses to examine the neuroanatomic correlates of impaired OI in CN and MCI, after adjusting for potential confounders. Analyses were also separately stratified by race and sex. RESULTS In CN, OI impairment was associated with smaller amygdala gray matter (GM) volume (p < 0.05). In MCI, OI impairment was associated with smaller GM volumes of the olfactory cortex, amygdala, entorhinal cortex, hippocampus, and insula (ps < 0.05). Differential associations were observed by sex in MCI; OI impairment was associated with lower insular GM volumes among men but not among women (p-interaction = 0.04). There were no meaningful interactions by race. CONCLUSION The brain regions associated with OI impairment in individuals without dementia are specifically those regions known to be the primary targets of AD pathogenic processes. These findings highlight the potential utility of olfactory assessment in the identification and stratification of older adults at risk for AD.
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Affiliation(s)
- Vidyulata Kamath
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Matthew L. Senjem
- Department of Radiology, Mayo Clinic, Rochester, MN
- Department of Information Technology, Mayo Clinic, Rochester, MN
| | | | - Honglei Chen
- Department of Epidemiology and Biostatistics, Michigan State University, East Lansing, MI
| | - Priya Palta
- Division of General Medicine, Department of Medicine, Columbia University Irving Medical Center, New York, NY
| | - Thomas H. Mosley
- The MIND Center, Department of Medicine, The University of Mississippi School of Medicine, Jackson, MI
| | - B. Gwen Windham
- The MIND Center, Department of Medicine, The University of Mississippi School of Medicine, Jackson, MI
| | - Michael Griswold
- The MIND Center, Department of Medicine, The University of Mississippi School of Medicine, Jackson, MI
| | | | - Rebecca F. Gottesman
- National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD
| | | | - A. Richey Sharrett
- Department of Epidemiology, Johns Hopkins University Bloomberg School of Public Health; Baltimore, MD
| | - Andrea L.C. Schneider
- Department of Neurology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA
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Zhang Y, Huang Z, Xia H, Xiong J, Ma X, Liu C. The benefits of exercise for outcome improvement following traumatic brain injury: Evidence, pitfalls and future perspectives. Exp Neurol 2021; 349:113958. [PMID: 34951984 DOI: 10.1016/j.expneurol.2021.113958] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 12/04/2021] [Accepted: 12/15/2021] [Indexed: 12/15/2022]
Abstract
Traumatic brain injury (TBI), also known as a silent epidemic, is currently a substantial public health problem worldwide. Given the increased energy demands following brain injury, relevant guidelines tend to recommend absolute physical and cognitive rest for patients post-TBI. Nevertheless, recent evidence suggests that strict rest does not provide additional benefits to patients' recovery. By contrast, as a cost-effective non-pharmacological therapy, exercise has shown promise for enhancing functional outcomes after injury. This article summarizes the most recent evidence supporting the beneficial effects of exercise on TBI outcomes, focusing on the efficacy of exercise for cognitive recovery after injury and its potential mechanisms. Available evidence demonstrates the potential of exercise in improving cognitive impairment, mood disorders, and post-concussion syndrome following TBI. However, the clinical application for exercise rehabilitation in TBI remains challenging, particularly due to the inadequacy of the existing clinical evaluation system. Also, a better understanding of the underlying mechanisms whereby exercise promotes its most beneficial effects post-TBI will aid in the development of new clinical strategies to best benefit of these patients.
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Affiliation(s)
- Yulan Zhang
- Cognitive & Sports Neuroscience Laboratory, National Demonstration Center for Experimental Sports Science Education, College of Physical Education and Sports Science, South China Normal University, Guangzhou, Guangdong 510006, China; Laboratory of Laser Sports Medicine, College of Physical Education and Sports Science, South China Normal University, Guangzhou, Guangdong 510006, China
| | - Zhihai Huang
- Cognitive & Sports Neuroscience Laboratory, National Demonstration Center for Experimental Sports Science Education, College of Physical Education and Sports Science, South China Normal University, Guangzhou, Guangdong 510006, China
| | - Honglin Xia
- Laboratory of Regenerative Medicine in Sports Science, College of Physical Education and Sports Science, South China Normal University, Guangzhou, Guangdong 510006, China
| | - Jing Xiong
- Cognitive & Sports Neuroscience Laboratory, National Demonstration Center for Experimental Sports Science Education, College of Physical Education and Sports Science, South China Normal University, Guangzhou, Guangdong 510006, China; Laboratory of Laser Sports Medicine, College of Physical Education and Sports Science, South China Normal University, Guangzhou, Guangdong 510006, China
| | - Xu Ma
- Cognitive & Sports Neuroscience Laboratory, National Demonstration Center for Experimental Sports Science Education, College of Physical Education and Sports Science, South China Normal University, Guangzhou, Guangdong 510006, China; Laboratory of Laser Sports Medicine, College of Physical Education and Sports Science, South China Normal University, Guangzhou, Guangdong 510006, China
| | - Chengyi Liu
- Laboratory of Laser Sports Medicine, College of Physical Education and Sports Science, South China Normal University, Guangzhou, Guangdong 510006, China.
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Schmid W, Fan Y, Chi T, Golanov E, Regnier-Golanov AS, Austerman RJ, Podell K, Cherukuri P, Bentley T, Steele CT, Schodrof S, Aazhang B, Britz GW. Review of wearable technologies and machine learning methodologies for systematic detection of mild traumatic brain injuries. J Neural Eng 2021; 18. [PMID: 34330120 DOI: 10.1088/1741-2552/ac1982] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 07/30/2021] [Indexed: 12/16/2022]
Abstract
Mild traumatic brain injuries (mTBIs) are the most common type of brain injury. Timely diagnosis of mTBI is crucial in making 'go/no-go' decision in order to prevent repeated injury, avoid strenuous activities which may prolong recovery, and assure capabilities of high-level performance of the subject. If undiagnosed, mTBI may lead to various short- and long-term abnormalities, which include, but are not limited to impaired cognitive function, fatigue, depression, irritability, and headaches. Existing screening and diagnostic tools to detect acute andearly-stagemTBIs have insufficient sensitivity and specificity. This results in uncertainty in clinical decision-making regarding diagnosis and returning to activity or requiring further medical treatment. Therefore, it is important to identify relevant physiological biomarkers that can be integrated into a mutually complementary set and provide a combination of data modalities for improved on-site diagnostic sensitivity of mTBI. In recent years, the processing power, signal fidelity, and the number of recording channels and modalities of wearable healthcare devices have improved tremendously and generated an enormous amount of data. During the same period, there have been incredible advances in machine learning tools and data processing methodologies. These achievements are enabling clinicians and engineers to develop and implement multiparametric high-precision diagnostic tools for mTBI. In this review, we first assess clinical challenges in the diagnosis of acute mTBI, and then consider recording modalities and hardware implementation of various sensing technologies used to assess physiological biomarkers that may be related to mTBI. Finally, we discuss the state of the art in machine learning-based detection of mTBI and consider how a more diverse list of quantitative physiological biomarker features may improve current data-driven approaches in providing mTBI patients timely diagnosis and treatment.
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Affiliation(s)
- William Schmid
- Department of Electrical and Computer Engineering and Neuroengineering Initiative (NEI), Rice University, Houston, TX 77005, United States of America
| | - Yingying Fan
- Department of Electrical and Computer Engineering and Neuroengineering Initiative (NEI), Rice University, Houston, TX 77005, United States of America
| | - Taiyun Chi
- Department of Electrical and Computer Engineering and Neuroengineering Initiative (NEI), Rice University, Houston, TX 77005, United States of America
| | - Eugene Golanov
- Department of Neurosurgery, Houston Methodist Hospital, Houston, TX 77030, United States of America
| | | | - Ryan J Austerman
- Department of Neurosurgery, Houston Methodist Hospital, Houston, TX 77030, United States of America
| | - Kenneth Podell
- Department of Neurology, Houston Methodist Hospital, Houston, TX 77030, United States of America
| | - Paul Cherukuri
- Institute of Biosciences and Bioengineering (IBB), Rice University, Houston, TX 77005, United States of America
| | - Timothy Bentley
- Office of Naval Research, Arlington, VA 22203, United States of America
| | - Christopher T Steele
- Military Operational Medicine Research Program, US Army Medical Research and Development Command, Fort Detrick, MD 21702, United States of America
| | - Sarah Schodrof
- Department of Athletics-Sports Medicine, Rice University, Houston, TX 77005, United States of America
| | - Behnaam Aazhang
- Department of Electrical and Computer Engineering and Neuroengineering Initiative (NEI), Rice University, Houston, TX 77005, United States of America
| | - Gavin W Britz
- Department of Neurosurgery, Houston Methodist Hospital, Houston, TX 77030, United States of America
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