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Ingram K, Aley MJ, Irving M, Wallace J. Interviews with policymakers in Australian health policy: Understanding the process of policy development. J Public Health Dent 2024; 84:118-123. [PMID: 38523347 DOI: 10.1111/jphd.12606] [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] [Received: 08/26/2023] [Revised: 12/02/2023] [Accepted: 01/21/2024] [Indexed: 03/26/2024]
Abstract
OBJECTIVE To determine the barriers and enablers oral health and chronic disease policymakers identify during policy development. METHODS Semi-structured interview questions were developed utilizing an interview guide and applying a knowledge mobilization framework. Reflective thematic analysis of the data was completed based on the research of Braun and Clarke encompassing a critical realist approach. RESULTS Twelve policymakers were interviewed. Policymakers reported barriers to accessing evidence including the sheer volume of information and a lack of: research summaries, comprehensive oral health data sets, open access articles, consistency of reporting, and time. They did find relationships with experts and intermediaries crucial at times to policy development. Co-creation of research was also a key enabler for policymakers. CONCLUSIONS This study highlights that policymakers find evidence crucial during the development of policy and often use it to advocate for policies. However, the links between poor oral health; and cardiovascular disease, diabetes, and cognitive impairment are not well recognized among chronic disease policymakers. It is important that oral health researchers and policymakers work to close this gap. The treatment of poor oral health is a global population health issue. It is imperative that evidence of these links is implemented into health policy for the treatment and prevention of chronic diseases and improved quality of life for individuals living with chronic diseases.
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Affiliation(s)
- Kelsey Ingram
- College of Health, Medicine and Well-Being, University of Newcastle, Ourimbah, Australia
| | - Melanie J Aley
- College of Health, Medicine and Well-Being, University of Newcastle, Ourimbah, Australia
- Sydney Dental School, Faculty of Medicine and Health, The University of Sydney, Camperdown, Australia
| | - Michelle Irving
- Centre for Evidence and Implementation, Melbourne, Australia
- Menzies Centre for Health Policy, The University of Sydney, Camperdown, Australia
| | - Janet Wallace
- College of Health, Medicine and Well-Being, University of Newcastle, Ourimbah, Australia
- Facilitator Oral Health Strategic Planning Project, University of Sydney, Sydney, Australia
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2
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Zhang M, Mi N, Ying Z, Lin X, Jin Y. Advances in the prevention and treatment of Alzheimer's disease based on oral bacteria. Front Psychiatry 2023; 14:1291455. [PMID: 38156323 PMCID: PMC10754487 DOI: 10.3389/fpsyt.2023.1291455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Accepted: 11/22/2023] [Indexed: 12/30/2023] Open
Abstract
With the global population undergoing demographic shift towards aging, the prevalence of Alzheimer's disease (AD), a prominent neurodegenerative disorder that primarily afflicts individuals aged 65 and above, has increased across various geographical regions. This phenomenon is accompanied by a concomitant decline in immune functionality and oral hygiene capacity among the elderly, precipitating compromised oral functionality and an augmented burden of dental plaque. Accordingly, oral afflictions, including dental caries and periodontal disease, manifest with frequency among the geriatric population worldwide. Recent scientific investigations have unveiled the potential role of oral bacteria in instigating both local and systemic chronic inflammation, thereby delineating a putative nexus between oral health and the genesis and progression of AD. They further proposed the oral microbiome as a potentially modifiable risk factor in AD development, although the precise pathological mechanisms and degree of association have yet to be fully elucidated. This review summarizes current research on the relationship between oral bacteria and AD, describing the epidemiological and pathological mechanisms that may potentially link them. The purpose is to enrich early diagnostic approaches by incorporating emerging biomarkers, offering novel insights for clinicians in the early detection of AD. Additionally, it explores the potential of vaccination strategies and guidance for clinical pharmacotherapy. It proposes the development of maintenance measures specifically targeting oral health in older adults and advocates for guiding elderly patients in adopting healthy lifestyle habits, ultimately aiming to indirectly mitigate the progression of AD while promoting oral health in the elderly.
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Affiliation(s)
| | | | | | | | - Ying Jin
- Department of Stomatology, Shengjing Hospital of China Medical University, Shenyang, China
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Kulkarni MS, Miller BC, Mahani M, Mhaskar R, Tsalatsanis A, Jain S, Yadav H. Poor Oral Health Linked with Higher Risk of Alzheimer's Disease. Brain Sci 2023; 13:1555. [PMID: 38002515 PMCID: PMC10669972 DOI: 10.3390/brainsci13111555] [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: 10/19/2023] [Revised: 10/26/2023] [Accepted: 11/03/2023] [Indexed: 11/26/2023] Open
Abstract
Alzheimer's disease (AD) is a multifactorial neurodegenerative disease characterized by cognitive and behavioral changes in older adults. Emerging evidence suggests poor oral health is associated with AD, but there is a lack of large-scale clinical studies demonstrating this link. Herein, we used the TriNetX database to generate clinical cohorts and assess the risk of AD and survival among >30 million de-identified subjects with normal oral health (n = 31,418,814) and poor oral health (n = 1,232,751). There was a greater than two-fold increase in AD risk in the poor oral health cohort compared to the normal oral health group (risk ratio (RR): 2.363, (95% confidence interval: 2.326, 2.401)). To reduce potential bias, we performed retrospective propensity score matching for age, gender, and multiple laboratory measures. After matching, the cohorts had no significant differences in survival probability. Furthermore, when comparing multiple oral conditions, diseases related to tooth loss were the most significant risk factor for AD (RR: 3.186, (95% CI: 3.007, 3.376)). Our results suggest that oral health may be important in AD risk, regardless of age, gender, or laboratory measures. However, more large-scale cohort studies are necessary to validate these findings and further evaluate links between oral health and AD.
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Affiliation(s)
- Mihir S. Kulkarni
- USF Center for Microbiome Research, Microbiomes Institute, Department of Neurosurgery and Brain Repair, University of South Florida, Tampa, FL 33612, USA
| | - Brandi C. Miller
- USF Center for Microbiome Research, Microbiomes Institute, Department of Neurosurgery and Brain Repair, University of South Florida, Tampa, FL 33612, USA
- USF Center for Microbiome Research, Microbiomes Institute, Department of Molecular Medicine, University of South Florida, Tampa, FL 33612, USA
| | - Manan Mahani
- USF Center for Microbiome Research, Microbiomes Institute, Department of Neurosurgery and Brain Repair, University of South Florida, Tampa, FL 33612, USA
| | - Rahul Mhaskar
- Department of Internal Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA
| | - Athanasios Tsalatsanis
- Research Methodology and Biostatistics Core, Department of Internal Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA
| | - Shalini Jain
- USF Center for Microbiome Research, Microbiomes Institute, Department of Neurosurgery and Brain Repair, University of South Florida, Tampa, FL 33612, USA
| | - Hariom Yadav
- USF Center for Microbiome Research, Microbiomes Institute, Department of Neurosurgery and Brain Repair, University of South Florida, Tampa, FL 33612, USA
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Gu W, Li J, Li F, Ho TE, Feng X, Wang Y, Fan M, Cui M, Xu K, Chen X, Lu H, Jiang Y. Association between oral health and cognitive function among Chinese older adults: the Taizhou imaging study. BMC Oral Health 2023; 23:640. [PMID: 37670297 PMCID: PMC10478256 DOI: 10.1186/s12903-023-03353-9] [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: 02/15/2023] [Accepted: 08/25/2023] [Indexed: 09/07/2023] Open
Abstract
BACKGROUND We aimed to investigate the association between oral health and cognitive function in a sample of older adults from a Chinese rural community. METHODS The cross-sectional cognitive function of 677 individuals were assessed by Mini-Mental State Examination (MMSE) and Montreal Cognitive Assessment (MoCA). A comprehensive profile of the oral health status was evaluated by questionnaire and clinical examination. RESULTS Multiple covariates-adjusted regression models demonstrated decayed teeth (DT) and decayed/missing/filled teeth (DMFT) were negatively associated with MoCA score (all p < 0.05). Calculus index (CI) and clinical attachment loss (CAL) were significantly associated with the lower MoCA, short-term memory and executive function score, respectively (all p < 0.05). Additionally, participants with missing teeth unrestored tend to get lower MMSE and MoCA scores (p < 0.05). The results also showed that increased DT and CI were modestly associated with higher odds of cognitive impairment (p < 0.05). CONCLUSIONS There is an association between oral health and global cognition. Poor periodontal status was strongly associated with worse global cognition performance, especially in the short-term memory and executive domain for the aging population.
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Affiliation(s)
- Wenjia Gu
- Department of Preventive Dentistry, Shanghai Ninth People's Hospital, College of Stomatology, National Center for Stomatology, Shanghai Key Laboratory of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, National Clinical Research Center for Oral Diseases, 639 Zhizaoju Road, Shanghai, 200011, China
| | - Jialin Li
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, Zhangjiang Fudan International Innovation Center, Fudan University, Shanghai, China
| | - Fei Li
- Department of Preventive Dentistry, Shanghai Ninth People's Hospital, College of Stomatology, National Center for Stomatology, Shanghai Key Laboratory of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, National Clinical Research Center for Oral Diseases, 639 Zhizaoju Road, Shanghai, 200011, China
| | - Teck-Ek Ho
- Department of Preventive Dentistry, Shanghai Ninth People's Hospital, College of Stomatology, National Center for Stomatology, Shanghai Key Laboratory of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, National Clinical Research Center for Oral Diseases, 639 Zhizaoju Road, Shanghai, 200011, China
| | - Xiping Feng
- Department of Preventive Dentistry, Shanghai Ninth People's Hospital, College of Stomatology, National Center for Stomatology, Shanghai Key Laboratory of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, National Clinical Research Center for Oral Diseases, 639 Zhizaoju Road, Shanghai, 200011, China
| | - Yingzhe Wang
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, Zhangjiang Fudan International Innovation Center, Fudan University, Shanghai, China
- Fudan University Taizhou Institute of Health Sciences, Taizhou, Jiangsu, China
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai, China
| | - Min Fan
- Taixing Disease Control and Prevention Center, Taizhou, Jiangsu, China
| | - Mei Cui
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai, China
| | - Kelin Xu
- Fudan University Taizhou Institute of Health Sciences, Taizhou, Jiangsu, China
- Department of Biostatistics, School of Public Health, Key Laboratory of Public Health Safety of Ministry of Education, Fudan University, Shanghai, China
| | - Xingdong Chen
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, Zhangjiang Fudan International Innovation Center, Fudan University, Shanghai, China
- Fudan University Taizhou Institute of Health Sciences, Taizhou, Jiangsu, China
| | - Haixia Lu
- Department of Preventive Dentistry, Shanghai Ninth People's Hospital, College of Stomatology, National Center for Stomatology, Shanghai Key Laboratory of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, National Clinical Research Center for Oral Diseases, 639 Zhizaoju Road, Shanghai, 200011, China.
| | - Yanfeng Jiang
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, Zhangjiang Fudan International Innovation Center, Fudan University, Shanghai, China.
- Fudan University Taizhou Institute of Health Sciences, Taizhou, Jiangsu, China.
- International Human Phenome Institute (Shanghai), Fudan University, 2005 Songhu Road, Shanghai, 200438, China.
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Liao Q, Li SZ, Tian FF, Huang K, Bi FF. No genetic causal association between dental caries and Alzheimer's disease: a bidirectional two-sample Mendelian randomization analysis. PeerJ 2023; 11:e15936. [PMID: 37637178 PMCID: PMC10460150 DOI: 10.7717/peerj.15936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 07/31/2023] [Indexed: 08/29/2023] Open
Abstract
Background An increasing number of observational studies have suggested an association between dental caries and Alzheimer's disease (AD). The association between dental caries and Alzheimer's disease may be mediated by confounders or reverse causality. In this study, we conducted bidirectional two-sample Mendelian randomization (MR) to estimate the bidirectional causality between dental caries and AD. Materials and Methods Genome-wide association study (GWAS) summary statistics of dental caries were extracted from a published meta-analysis which included a total of 487,823 participants. GWAS datasets of AD and AD onset age were obtained from the FinnGen bank. A bidirectional two-sample analysis was performed to explore the causality between dental caries and AD. Results For the dental caries-AD causality estimation, there was no significant association between dental caries and AD, neither with the AD GWASs from the FinnGen database (OR: 1.041, p = 0.874) nor with those from the International Genomics of Alzheimer's Project (OR: 1.162, p = 0.409). In addition, the genetic susceptibility to dental caries was not related to the onset age of AD. No causality existed between dental caries and early-onset AD (OR: 0.515, p = 0.302) or late-onset AD (OR: 1.329, p = 0.347). For the AD-dental caries relationship, no causality was detected by the IVW method (OR: 1.000, p = 0.717). Findings from other MR methods were consistent. The pleiotropy test and sensitivity analysis confirmed the validity of these MR results. Conclusions In this bidirectional MR study, robust evidence to support a bidirectional causal effect between dental caries and AD from the GWAS results within large-scale European-descent populations was absent. Having dental caries would not alter the onset age of AD.
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Affiliation(s)
- Qiao Liao
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Si-Zhuo Li
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Fa-Fa Tian
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Kun Huang
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Fang-Fang Bi
- Department of Neurology, Fifth Affiliated Hospital of Sun Yat-Sen University, Zhuhai, Guangdong, China
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Jayasinghe TN, Harrass S, Erdrich S, King S, Eberhard J. Protein Intake and Oral Health in Older Adults-A Narrative Review. Nutrients 2022; 14:4478. [PMID: 36364741 PMCID: PMC9653899 DOI: 10.3390/nu14214478] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 10/18/2022] [Accepted: 10/20/2022] [Indexed: 08/31/2023] Open
Abstract
Oral health is vital to general health and well-being for all ages, and as with other chronic conditions, oral health problems increase with age. There is a bi-directional link between nutrition and oral health, in that nutrition affects the health of oral tissues and saliva, and the health of the mouth may affect the foods consumed. Evidence suggests that a healthy diet generally has a positive impact on oral health in older adults. Although studies examining the direct link between oral health and protein intake in older adults are limited, some have explored the relationship via malnutrition, which is also prevalent among older adults. Protein-energy malnutrition (PEM) may be associated with poor oral health, dental caries, enamel hypoplasia, and salivary gland atrophy. This narrative review presents the theoretical evidence on the impact of dietary protein and amino acid composition on oral health, and their combined impact on overall health in older adults.
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Affiliation(s)
- Thilini N. Jayasinghe
- The Charles Perkins Centre, The University of Sydney, Sydney, NSW 2006, Australia
- School of Dentistry, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2006, Australia
| | - Sanaa Harrass
- School of Life Sciences, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - Sharon Erdrich
- School of Pharmacy, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2006, Australia
| | - Shalinie King
- School of Dentistry, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2006, Australia
| | - Joerg Eberhard
- The Charles Perkins Centre, The University of Sydney, Sydney, NSW 2006, Australia
- School of Dentistry, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2006, Australia
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7
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Lu J, Zhang S, Huang Y, Qian J, Tan B, Qian X, Zhuang J, Zou X, Li Y, Yan F. Periodontitis-related salivary microbiota aggravates Alzheimer's disease via gut-brain axis crosstalk. Gut Microbes 2022; 14:2126272. [PMID: 36175166 PMCID: PMC9542625 DOI: 10.1080/19490976.2022.2126272] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
The oral cavity is the initial chamber of digestive tract; the saliva swallowed daily contains an estimated 1.5 × 1012 oral bacteria. Increasing evidence indicates that periodontal pathogens and subsequent inflammatory responses to them contribute to the pathogenesis of Alzheimer's disease (AD). The intestine and central nervous system jointly engage in crosstalk; microbiota-mediated immunity significantly impacts AD via the gut-brain axis. However, the exact mechanism linking periodontitis to AD remains unclear. In this study, we explored the influence of periodontitis-related salivary microbiota on AD based on the gut-brain crosstalk in APPswe/PS1ΔE9 (PAP) transgenic mice. Saliva samples were collected from patients with periodontitis and healthy individuals. The salivary microbiota was gavaged into PAP mice for two months. Continuous gavage of periodontitis-related salivary microbiota in PAP mice impaired cognitive function and increased β-amyloid accumulation and neuroinflammation. Moreover, these AD-related pathologies were consistent with gut microbial dysbiosis, intestinal pro-inflammatory responses, intestinal barrier impairment, and subsequent exacerbation of systemic inflammation, suggesting that the periodontitis-related salivary microbiota may aggravate AD pathogenesis through crosstalk of the gut-brain axis. In this study, we demonstrated that periodontitis might participate in the pathogenesis of AD by swallowing salivary microbiota, verifying the role of periodontitis in AD progression and providing a novel perspective on the etiology and intervention strategies of AD.
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Affiliation(s)
- Jiangyue Lu
- Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China
| | - Shuang Zhang
- Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China
| | - Yuezhen Huang
- Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China
| | - Jun Qian
- Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China
| | - Baochun Tan
- Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China
| | - Xueshen Qian
- Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China
| | - Jia Zhuang
- Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China
| | - Xihong Zou
- Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China
| | - Yanfen Li
- Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China,CONTACT Fuhua Yan
| | - Fuhua Yan
- Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China,Yanfen Li Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, Jiangsu, 210008, China
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8
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Zhang XM, Wu X, Chen W. The Association between Number of Teeth and Cognitive Frailty in Older Adults: A Cross-Sectional Study. J Nutr Health Aging 2022; 26:430-438. [PMID: 35587754 DOI: 10.1007/s12603-022-1783-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVES This study aimed to explore the association between number of teeth and cognitive frailty in American older adults. DESIGN Cross-sectional study. SETTING Community. PARTICIPANTS The participants were 1,531 community-dwelling older adults aged 60 or older from the NHANES database. METHODS Frailty was assessed using a 49-item frailty index, with a cut-off value for frailty of more than 0.21. Cognitive dysfunction was evaluated by the Digit-Symbol Coding Test (DSCT), with the cut-off being below the lowest interquartile range (scores ≤37). Cognitive frailty was defined as participants who suffered from both frailty and cognitive dysfunction. Oral health indicators included number of teeth and other factors, such as the presence of gum disease, daily use of dental floss, daily use of mouthwash and self-rated oral health. Multivariable logistic regression models were used to explore the relationship between number of teeth and cognitive frailty. RESULTS The mean age of the total sample was 69.67 (SD=6.60) years, and 52.71% (n=807) were female. Our study suggests there was a negative association between number of teeth and cognitive frailty (OR =0.98,95%CI:0.96-0.99, P=0.044) after controlling for potential confounding factors. In addition, older adults with 20 or more teeth had lower odds of being cognitively frail (OR=0.66,95%CI:0.44-0.99, P=0.046) than individuals who had less than 20 teeth. CONCLUSION This study suggests that older adults who have more teeth are associated with a lower risk of cognitive frailty. This finding highlights the importance of maintaining as many teeth as possible throughout life and into old age. Cohort studies will be required in the future to determine this relationship.
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Affiliation(s)
- X-M Zhang
- Xinjuan Wu and Wei Chen, Chinese Academy of Medical Sciences - Peking Union Medical College, Peking Union Medical College Hospital (Dongdan campus), Beijing, 100730, China, Xinjuan Wu: ; Wei Chen:
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Maitre Y, Mahalli R, Micheneau P, Delpierre A, Amador G, Denis F. Evidence and Therapeutic Perspectives in the Relationship between the Oral Microbiome and Alzheimer's Disease: A Systematic Review. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph182111157. [PMID: 34769677 PMCID: PMC8583399 DOI: 10.3390/ijerph182111157] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 10/20/2021] [Accepted: 10/21/2021] [Indexed: 02/06/2023]
Abstract
This review aims to clarify the nature of the link between Alzheimer’s disease and the oral microbiome on an epidemiological and pathophysiological level, as well as to highlight new therapeutic perspectives that contribute to the management of this disease. We performed a systematic review, following the Preferred Reporting Items for Systematic Reviews checklist, from January 2000 to July 2021. The terms “plaque,” “saliva,” and “mouth” were associated with the search term “oral diseases” and used in combination with the Boolean operator “AND”/“OR”. We included experimental or clinical studies and excluded conferences, abstracts, reviews, and editorials. A total of 27 articles were selected. Evidence for the impact of the oral microbiome on the pathophysiological and immunoinflammatory mechanisms of Alzheimer’s disease is accumulating. The impact of the oral microbiome on the development of AD opens the door to complementary therapies such as phototherapy and/or the use of prebiotic compounds and probiotic strains for global or targeted modulation of the oral microbiome in order to have a favourable influence on the evolution of this pathology in the future.
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Affiliation(s)
- Yoann Maitre
- Emergency Department, Montpellier University Hospital, 34090 Montpellier, France;
- EA 2415, Aide à la Décision pour une Médecine Personnalisée, Université de Montpellier, 34093 Montpellier, France
| | - Rachid Mahalli
- Department of Odontology, Tours University Hospital, 37000 Tours, France; (R.M.); (P.M.); (A.D.)
| | - Pierre Micheneau
- Department of Odontology, Tours University Hospital, 37000 Tours, France; (R.M.); (P.M.); (A.D.)
| | - Alexis Delpierre
- Department of Odontology, Tours University Hospital, 37000 Tours, France; (R.M.); (P.M.); (A.D.)
| | - Gilles Amador
- Faculty of Dentistry, Nantes University, 44000 Nantes, France;
| | - Frédéric Denis
- Department of Odontology, Tours University Hospital, 37000 Tours, France; (R.M.); (P.M.); (A.D.)
- Faculty of Dentistry, Nantes University, 44000 Nantes, France;
- EA 75-05 Education, Ethique, Santé, Faculté de Médecine, Université François-Rabelais, 37044 Tours, France
- Correspondence: ; Tel.: +33-6-7715-6968
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10
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Kose O, Altin A, Kurt Bayrakdar S, Bostan SA, Mercantepe T, Akyildiz K, Tumkaya L, Yilmaz A, Kose S, Yemenoglu H, Turker Sener L, Kuluslu G. Influences of periodontitis on hippocampal inflammation, oxidative stress, and apoptosis in rats. J Periodontal Res 2021; 56:1154-1162. [PMID: 34486732 DOI: 10.1111/jre.12929] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 08/26/2021] [Indexed: 12/20/2022]
Abstract
BACKGROUND AND AIM The hippocampus, which has a central role in cognitive and behavioral activities, is one of the most sensitive parts of the brain to systemic inflammatory diseases. This animal study aims to comprehensively investigate the possible inflammatory, oxidative, and apoptotic effects of periodontitis on the hippocampus. METHODS Sixteen male Sprague-Dawley rats were randomly assigned to two groups: control and experimental periodontitis (Ep). In the Ep group, periodontitis was induced by placing 3.0 sutures sub-paramarginally around the necks of right and left mandibular first molars and maintaining the ligatures in place for 5 weeks. Following the euthanasia, mandibula and hippocampus samples were collected bilaterally. Alveolar bone loss was measured histomorphometrically and radiologically on the right and left mandibles. On the right hippocampal sections histological (Caspase-3, TNF-α, and 8-OHdG) and the left hippocampal sections, biochemical (IL-1β, Aβ1-42 , MDA, GSH, and TAS levels) evaluations were performed. RESULTS Histopathological changes associated with periodontitis were limited (p > .05). A slight increase in caspase-3 positive neuron density in EP rats showed that apoptotic changes were also limited (p > .05). 8-OHdG activity, on the other hand, was significantly higher compared to controls (p < .05). In biochemical analysis, there was a significant increase in IL-1β levels and oxidative membrane damage (MDA) (p < .05) whereas Aβ1-42 and antioxidant marker (GSH and TAS) levels were slightly increased (p > .05). CONCLUSION Periodontitis causes marked increases in IL-1β levels and oxidative stress in the hippocampus, but limited degenerative and apoptotic changes.
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Affiliation(s)
- Oğuz Kose
- Department of Periodontology, School of Dentistry, Recep Tayyip Erdogan University, Rize, Turkey
| | - Ahmet Altin
- Department of Periodontology, School of Dentistry, Recep Tayyip Erdogan University, Rize, Turkey
| | - Sevda Kurt Bayrakdar
- Department of Periodontology, School of Dentistry, Eskişehir Osmangazi University, Eskisehir, Turkey
| | - Semih Alperen Bostan
- Department of Periodontology, School of Dentistry, Recep Tayyip Erdogan University, Rize, Turkey
| | - Tolga Mercantepe
- Department of Histology and Embryology, School of Medicine, Recep Tayyip Erdogan University, Rize, Turkey
| | - Kerimali Akyildiz
- Department of Medical Services and Techniques, School of Health Care Services Vocational, Recep Tayyip Erdogan University, Rize, Turkey
| | - Levent Tumkaya
- Department of Histology and Embryology, School of Medicine, Recep Tayyip Erdogan University, Rize, Turkey
| | - Adnan Yilmaz
- Department of Biochemistry, School of Medicine, Recep Tayyip Erdogan University, Rize, Turkey
| | - Sefanur Kose
- Department of Psychiatry, School of Medicine, Recep Tayyip Erdogan University, Rize, Turkey
| | - Hatice Yemenoglu
- Department of Periodontology, School of Dentistry, Recep Tayyip Erdogan University, Rize, Turkey
| | - Leyla Turker Sener
- Department of Biophysics, School of Medicine, Istanbul University, Istanbul, Turkey
| | - Göker Kuluslu
- 3D Medical and Industrial Design Laboratory, Istanbul University, Istanbul, Turkey
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Scherer RX, Scherer WJ. U.S. state correlations between oral health metrics and Alzheimer's disease mortality, prevalence and subjective cognitive decline prevalence. Sci Rep 2020; 10:20962. [PMID: 33262437 PMCID: PMC7708488 DOI: 10.1038/s41598-020-77937-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 11/17/2020] [Indexed: 01/21/2023] Open
Abstract
Given the association between periodontal disease (PdD) and Alzheimer’s disease (AD), we examined correlations between states’ age-adjusted AD mortality rates, AD prevalence, subjective cognitive decline (SCD) prevalence, and oral health data. Data sources include the Centers for Disease Control and Prevention, scientific literature, and oral health rankings formulated by WalletHub.com and Toothbrush.org. Pearson (r) or Spearman (rs) correlation coefficients were generated and evaluated. AD mortality rates correlate with dental visits (r = − 0.50, p = 0.0003), partial (r = 0.39, p = 0.005) or total (r = 0.44, p = 0.001) edentulism, WalletHub.com (rs = 0.30, p = 0.03) and Toothbrush.org (rs = 0.35, p = 0.01) rankings. AD prevalence correlates with dental visits (r = − 0.30, p = 0.03), partial (r = 0.55, p = 0.00003) or total (r = 0.46, p = 0.0009) edentulism, prevalence of any (r = 0.38, p = 0.006) or severe-stage (r = 0.46, p = 0.0009) PdD, and WalletHub.com (rs = 0.38, p = 0.006) rankings. SCD prevalence in adults aged ≥ 45 years correlates with dental visits (r = − 0.69, p < 0.00001), partial (r = 0.33, p = 0.02) or total (r = 0.37, p = 0.008) edentulism, prevalence of any (r = 0.53, p = 0.0001) or severe-stage (r = 0.57, p = 0.00002) PdD, WalletHub.com (rs = 0.53, p = 0.00008) and Toothbrush.org (rs = 0.60, p < 0.00001) rankings. State metrics indicative of compromised oral health correlate with AD mortality rates, AD prevalence and SCD prevalence.
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Affiliation(s)
- Rana X Scherer
- University of Central Florida, The Burnett Honors College, 12778 Aquarius Agora Drive, Orlando, FL, 32816-1800, USA
| | - Warren J Scherer
- St. Luke's Cataract & Laser Institute, 43309 U.S. Highway 19 N., Tarpon Springs, FL, 34689, USA.
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