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Borrego-Ruiz A, Borrego JJ. Influence of human gut microbiome on the healthy and the neurodegenerative aging. Exp Gerontol 2024; 194:112497. [PMID: 38909763 DOI: 10.1016/j.exger.2024.112497] [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: 03/04/2024] [Revised: 05/16/2024] [Accepted: 06/17/2024] [Indexed: 06/25/2024]
Abstract
The gut microbiome plays a crucial role in host health throughout the lifespan by influencing brain function during aging. The microbial diversity of the human gut microbiome decreases during the aging process and, as a consequence, several mechanisms increase, such as oxidative stress, mitochondrial dysfunction, inflammatory response, and microbial gut dysbiosis. Moreover, evidence indicates that aging and neurodegeneration are closely related; consequently, the gut microbiome may serve as a novel marker of lifespan in the elderly. In this narrative study, we investigated how the changes in the composition of the gut microbiome that occur in aging influence to various neuropathological disorders, such as mild cognitive impairment (MCI), dementia, Alzheimer's disease (AD), and Parkinson's disease (PD); and which are the possible mechanisms that govern the relationship between the gut microbiome and cognitive impairment. In addition, several studies suggest that the gut microbiome may be a potential novel target to improve hallmarks of brain aging and to promote healthy cognition; therefore, current and future therapeutic interventions have been also reviewed.
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Affiliation(s)
- Alejandro Borrego-Ruiz
- Departamento de Psicología Social y de las Organizaciones, Universidad Nacional de Educación a Distancia (UNED), Madrid, Spain
| | - Juan J Borrego
- Departamento de Microbiología, Universidad de Málaga, Málaga, Spain; Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina-IBIMA, Plataforma BIONAND, Málaga, Spain.
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2
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Wang B, Zhang C, Shi C, Zhai T, Zhu J, Wei D, Shen J, Liu Z, Jia K, Zhao L. Mechanisms of oral microflora in Parkinson's disease. Behav Brain Res 2024; 474:115200. [PMID: 39134178 DOI: 10.1016/j.bbr.2024.115200] [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: 03/28/2024] [Revised: 08/09/2024] [Accepted: 08/09/2024] [Indexed: 08/16/2024]
Abstract
Parkinson's disease (PD) is a common neurodegenerative disease with complex pathogenesis and no effective treatment. Recent studies have shown that dysbiosis of the oral microflora is closely related to the development of PD. The abnormally distributed oral microflora of PD patients cause degenerative damage and necrosis of dopamine neurons by releasing their own components and metabolites, intervening in the oral-gut-brain axis, crossing the biofilm, inducing iron dysregulation, activating inter-microflora interactions, and through the mediation of saliva,ultimately influencing the development of the disease. This article reviews the structure of oral microflora in patients with PD, the mechanism of development of PD caused by oral microflora, and the potential value of targeting oral microflora in developing a new strategy for PD prevention, diagnosis and treatment.
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Affiliation(s)
- Bingbing Wang
- Medical School of Yan'an University, Yan'an, Shaanxi, China
| | - Can Zhang
- Medical School of Yan'an University, Yan'an, Shaanxi, China
| | - Caizhen Shi
- Medical School of Yan'an University, Yan'an, Shaanxi, China
| | - Tianyu Zhai
- Medical School of Yan'an University, Yan'an, Shaanxi, China
| | - Jinghui Zhu
- Medical School of Yan'an University, Yan'an, Shaanxi, China
| | - Dongmin Wei
- Medical School of Yan'an University, Yan'an, Shaanxi, China
| | - Juan Shen
- Medical School of Yan'an University, Yan'an, Shaanxi, China
| | - Zehao Liu
- Medical School of Yan'an University, Yan'an, Shaanxi, China
| | - Kunpeng Jia
- Yan'an University Affiliated Hospital, Yan'an, Shaanxi, China.
| | - Lin Zhao
- Medical School of Yan'an University, Yan'an, Shaanxi, China.
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Tao K, Yuan Y, Xie Q, Dong Z. Relationship between human oral microbiome dysbiosis and neuropsychiatric diseases: An updated overview. Behav Brain Res 2024; 471:115111. [PMID: 38871130 DOI: 10.1016/j.bbr.2024.115111] [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: 04/01/2024] [Revised: 05/24/2024] [Accepted: 06/10/2024] [Indexed: 06/15/2024]
Abstract
The role of the gut-brain axis in mental health disorders has been extensively studied. As the oral cavity is the starting point of the digestive tract, the role that the oral microbiota plays in mental health disorders has gained recent attention. Oral microbiota can enter the bloodstream and trigger inflammatory responses or translocate to the brain through the trigeminal nerve or olfactory system. Hence, the concept of the oral microbiota-brain axis has emerged. Several hypotheses have been suggested that the oral microbiota can enter the gastrointestinal tract and affect the gut-brain axis; however, literature describing oral-brain communication remains limited. This review summarizes the characteristics of oral microbiota and its mechanisms associated with mental health disorders. Through a comprehensive examination of the relationship between oral microbiota and various neuropsychiatric diseases, such as anxiety, depression, schizophrenia, autism spectrum disorder, epilepsy, Parkinson's disease, and dementia, this review seeks to identify promising avenues of future research.
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Affiliation(s)
- Kai Tao
- West China School of Medicine, West China Hospital, Sichuan University, Chengdu 610041, People's Republic of China
| | - Yanling Yuan
- Department of Pharmacy, West China Hospital, Sichuan University, Chengdu 610041, People's Republic of China
| | - Qinglian Xie
- Department of Outpatient, West China Hospital, Sichuan University, Chengdu 610041, People's Republic of China; Department of Outpatient, West China Xiamen Hospital, Sichuan University, Fujian 361022, People's Republic of China.
| | - Zaiquan Dong
- Mental Health Center, West China Hospital, Sichuan University, Chengdu 610041, People's Republic of China.
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Chen JT, Tsai S, Chen MH, Pitiphat W, Matangkasombut O, Chiou JM, Han ML, Chen JH, Chen YC. Association between oral health and cognitive impairment in older adults: Insights from a Six-year prospective cohort study. J Dent 2024; 147:105088. [PMID: 38801941 DOI: 10.1016/j.jdent.2024.105088] [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: 08/16/2023] [Revised: 05/14/2024] [Accepted: 05/16/2024] [Indexed: 05/29/2024] Open
Abstract
OBJECTIVE This study aims to investigate the relationships between four baseline oral conditions (periodontal status, dental caries, tooth wear, and dentition) and repeated global cognition or domain-specific cognition (memory, executive function, attention, and verbal fluency) in non-demented older adults over time. METHODS This prospective cohort study (2011-2019) enrolled 516 non-demented community-dwelling older adults (age ≥ 65) to explore the association between oral health and cognitive function. Global and domain-specific cognition were assessed biennially (four repeats) using a battery of neuropsychological tests. The baseline oral health conditions were examined, including periodontal status, dental caries, tooth wear, and dentition. The association of these oral conditions with cognition was evaluated by generalized linear mixed models. Stratified analyses were performed by important covariates. RESULTS Over time, dental caries was associated with poor memory in two different logical memory tests (β^= -0.06 and β^= -0.04). Incomplete dentition with less than 28 teeth was associated with poor performance in attention (β^= -0.05) and verbal fluency (β^= -0.03). These associations became more evident in those with an elevated inflammatory marker (IL-6, β^= -0.11 to -0.08). In contrast, tooth wear was associated with better memory in two different logical memory tests (β^= 0.33 and β^= 0.36) and better executive function (β^= 0.06) over time, and this association became more evident in those with the lowest inflammatory marker (IL-6, β^= 0.10). CONCLUSIONS Dental caries and incomplete dentition were associated with poor memory, attention, and verbal fluency performance. Conversely, tooth wear was associated with better memory performance and executive function. CLINICAL SIGNIFICANCE For early prevention of dementia, an evaluation of multiple dental and periodontal status in older adults helps predict the risk of dementia in the preclinical phase. Maintaining intact tooth structure without caries progression and eventually tooth loss may help prevent the worsening of memory, attention, and verbal fluency over time.
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Affiliation(s)
- Jung-Tsu Chen
- Graduate Institute of Clinical Dentistry, School of Dentistry, National Taiwan University, No.1, Changde St., Taipei 100229, Taiwan; Department of Dentistry, National Taiwan University Hospital, No.1, Changde St., Taipei 100229, Taiwan
| | - Stephanie Tsai
- Graduate Institute of Clinical Dentistry, School of Dentistry, National Taiwan University, No.1, Changde St., Taipei 100229, Taiwan
| | - Min-Huey Chen
- Graduate Institute of Clinical Dentistry, School of Dentistry, National Taiwan University, No.1, Changde St., Taipei 100229, Taiwan; Department of Dentistry, National Taiwan University Hospital, No.1, Changde St., Taipei 100229, Taiwan
| | - Waranuch Pitiphat
- Department of Preventive Dentistry, Faculty of Dentistry, Khon Kaen University, Khon Kaen, Thailand
| | - Oranart Matangkasombut
- Department of Microbiology and Center of Excellence on Oral Microbiology, Chulalongkorn University, Henri Dunant Road, Pathumwan, Bangkok 10330, Thailand; Research Laboratory of Biotechnology, Chulabhorn Research Institute, Laksi, Bangkok 10210, Thailand
| | - Jeng-Min Chiou
- Institute of Statistics and Data Science, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 106216, Taiwan
| | - Ming-Lun Han
- Department of Internal Medicine, College of Medicine, National Taiwan University, No.1, Jen Ai Road Section 1, Taipei 100233, Taiwan
| | - Jen-Hau Chen
- Department of Internal Medicine, National Taiwan University Hospital, No.1, Changde St., Taipei 100229, Taiwan; Department of Geriatrics and Gerontology, National Taiwan University Hospital, No.1, Changde St., Taipei 100229, Taiwan.
| | - Yen-Ching Chen
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, No. 17, Xuzhou Road, Taipei 100025, Taiwan; Department of Public Health, College of Public Health, National Taiwan University, No. 17, Xuzhou Road, Taipei 100025, Taiwan.
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Jameie M, Ahli B, Ghadir S, Azami M, Amanollahi M, Ebadi R, Rafati A, Naser Moghadasi A. The hidden link: How oral and respiratory microbiomes affect multiple sclerosis. Mult Scler Relat Disord 2024; 88:105742. [PMID: 38964239 DOI: 10.1016/j.msard.2024.105742] [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: 04/28/2024] [Revised: 06/16/2024] [Accepted: 06/20/2024] [Indexed: 07/06/2024]
Abstract
BACKGROUND Extensive research has explored the role of gut microbiota in multiple sclerosis (MS). However, the impact of microbial communities in the oral cavity and respiratory tract on MS is an emerging area of investigation. PURPOSE We aimed to review the current literature related to the nasal, oral, and lung microbiota in people with MS (PwMS). METHODS We conducted a narrative review of clinical and preclinical original studies on PubMed that explored the relationship between the bacterial or viral composition of the nasal, lung, and oral microbiota and MS. Additionally, to find relevant studies not retrieved initially, we also searched for references in related review papers, as well as the references cited within the included studies. RESULTS AND CONCLUSIONS Thirteen studies were meticulously reviewed in three sections; oral microbiota (n = 8), nasal microbiota (n = 3), and lung microbiota (n = 2), highlighting considerable alterations in the oral and respiratory microbiome of PwMS compared to healthy controls (HCs). Genera like Aggregatibacter and Streptococcus were less abundant in the oral microbiota of PwMS compared to HCs, while Staphylococcus, Leptotrichia, Fusobacterium, and Bacteroides showed increased abundance in PwMS. Additionally, the presence of specific bacteria, including Streptococcus sanguinis, within the oral microbiota was suggested to influence Epstein-Barr virus reactivation, a well-established risk factor for MS. Studies related to the nasal microbiome indicated elevated levels of specific Staphylococcus aureus toxins, as well as nasal glial cell infection with human herpes virus (HHV)-6 in PwMS. Emerging research on lung microbiome in animal models demonstrated that manipulating the lung microbiome towards lipopolysaccharide-producing bacteria might suppress MS symptoms. These findings open avenues for potential therapeutic strategies. However, further research is crucial to fully understand the complex interactions between the microbiome and MS. This will help identify the most effective timing, bacterial strains, and modulation techniques.
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Affiliation(s)
- Melika Jameie
- Neuroscience Research Center, Iran University of Medical Sciences, Tehran, Iran; Iranian Center of Neurological Research, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Bahareh Ahli
- School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Sara Ghadir
- Student Research Committee, Babol University of Medical Sciences, Babol, Iran
| | - Mobin Azami
- Student Research Committee, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Mobina Amanollahi
- School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Reza Ebadi
- School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Ali Rafati
- School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Abdorreza Naser Moghadasi
- Multiple Sclerosis Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran.
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Paul A, Wellslager B, Williamson M, Yilmaz Ö. Bacterial Protein Signatures Identified in Porphyromonas gingivalis Containing-Autophagic Vacuoles Reveal Co-Evolution Between Oral Red/Orange Complex Bacteria and Gut Bacteria. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.07.11.602567. [PMID: 39026754 PMCID: PMC11257597 DOI: 10.1101/2024.07.11.602567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/20/2024]
Abstract
Modern oral bacterial species present as a concoction of commensal and opportunistic pathogens originating from their evolution in humans. Due to the intricate colonization mechanisms shared amongst oral and gut bacteria, these bacteria have likely evolved together to establish and adapt in the human oro-digestive tract, resulting in the transfer of genetic information. Our liquid chromatography-with-tandem-mass-spectrometry (LC-MS-MS) analyses have revealed protein signatures, Elongation Factor Tu, RagB/SusD nutrient uptake outer membrane protein and DnaK, specifically from Porphyromonas gingivalis -containing autophagic vacuoles isolated from the infected human primary gingival epithelial cells. Interestingly, our Mass-Spectrometry analysis reported similar proteins from closely related oral bacteria, Tannerella forsythia and Prevotella intermedia . In our phylogenetic study of these key protein signatures, we have established that pathogenic oral bacteria share extensive relatedness to each other and gut resident bacteria. We show that in the virulence factors identified from gut bacteria, Elongation Factor Tu and DnaK, there are several structural similarities and conservations with proteins from oral pathogenic bacteria. There are also major similarities in the RagB/SusD proteins of oral bacteria to prominent gut bacteria. These findings not only highlight the shared virulence mechanisms amongst oral bacterial pathogens/pathobionts but also gut bacteria and elucidate their co-evolutions in the human host.
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Zhuang J, Zhang S, Chen H, Qiu C, Feng T, Zhou W, Han X, Song Z. Evidence of microbiota-host dysbiosis between periodontitis and cerebral small vessel disease. Oral Dis 2024. [PMID: 38923260 DOI: 10.1111/odi.15041] [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: 02/14/2024] [Revised: 05/30/2024] [Accepted: 06/02/2024] [Indexed: 06/28/2024]
Abstract
OBJECTIVES To investigate the correlation between periodontitis and cerebral small vessel disease (CSVD) from the clinical and microbiological aspects. SUBJECTS AND METHODS Periodontitis patients (CP group, n = 31) and CSVD patients (CSVD group, n = 30) were examined for neurological and periodontal condition. Subgingival plaque was collected and performed using 16S rRNA sequencing. Logistic regression and LASSO regression were used to analyze the periodontal parameters and subgingival microbiota related to CSVD, respectively. Inflammatory factors in gingival crevicular fluid (GCF) were also detected and compared between the two groups. RESULTS Clinical attachment level (CAL), teeth number and plaque index demonstrated a significant difference between CP and CSVD group, meanwhile, CAL was independently associated with CSVD. Besides, the microbial richness and composition were distinct between two groups. Five genera related to periodontal pathogens (Treponema, Prevotella, Streptococcus, Fusobacterium, Porphyromonas) were screened out by LASSO regression, suggesting a potential association with CSVD. Finally, the levels of inflammatory factors in GCF were statistically higher in CSVD group than those in CP group. CONCLUSIONS Cerebral small vessel disease patients demonstrated worse periodontal condition, meanwhile the interaction between microbiota dysbiosis and host factors (inflammation) leading to a better understanding of the association between periodontitis and CSVD.
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Affiliation(s)
- Jiabao Zhuang
- Department of Periodontology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, Shanghai, China
- National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai, China
| | - Shufan Zhang
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai, China
| | - Huiwen Chen
- Department of Periodontology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, Shanghai, China
- National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai, China
| | - Che Qiu
- Department of Periodontology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, Shanghai, China
- National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai, China
| | - Tienan Feng
- Clinical Research Institute, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Wei Zhou
- Department of Periodontology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, Shanghai, China
- National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai, China
| | - Xiang Han
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai, China
| | - Zhongchen Song
- Department of Periodontology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, Shanghai, China
- National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai, China
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Kim JT, Song K, Han SW, Youn DH, Jung H, Kim KS, Lee HJ, Hong JY, Cho YJ, Kang SM, Jeon JP. Modeling of the brain-lung axis using organoids in traumatic brain injury: an updated review. Cell Biosci 2024; 14:83. [PMID: 38909262 PMCID: PMC11193205 DOI: 10.1186/s13578-024-01252-2] [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: 03/04/2024] [Accepted: 05/24/2024] [Indexed: 06/24/2024] Open
Abstract
Clinical outcome after traumatic brain injury (TBI) is closely associated conditions of other organs, especially lungs as well as degree of brain injury. Even if there is no direct lung damage, severe brain injury can enhance sympathetic tones on blood vessels and vascular resistance, resulting in neurogenic pulmonary edema. Conversely, lung damage can worsen brain damage by dysregulating immunity. These findings suggest the importance of brain-lung axis interactions in TBI. However, little research has been conducted on the topic. An advanced disease model using stem cell technology may be an alternative for investigating the brain and lungs simultaneously but separately, as they can be potential candidates for improving the clinical outcomes of TBI.In this review, we describe the importance of brain-lung axis interactions in TBI by focusing on the concepts and reproducibility of brain and lung organoids in vitro. We also summarize recent research using pluripotent stem cell-derived brain organoids and their preclinical applications in various brain disease conditions and explore how they mimic the brain-lung axis. Reviewing the current status and discussing the limitations and potential perspectives in organoid research may offer a better understanding of pathophysiological interactions between the brain and lung after TBI.
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Affiliation(s)
- Jong-Tae Kim
- Institute of New Frontier Research, Hallym University College of Medicine, Chuncheon, 24252, Republic of Korea
| | - Kang Song
- Department of Green Chemical Engineering, Sangmyung University, Cheonan, 31066, Republic of Korea
| | - Sung Woo Han
- Institute of New Frontier Research, Hallym University College of Medicine, Chuncheon, 24252, Republic of Korea
| | - Dong Hyuk Youn
- Institute of New Frontier Research, Hallym University College of Medicine, Chuncheon, 24252, Republic of Korea
| | - Harry Jung
- Institute of New Frontier Research, Hallym University College of Medicine, Chuncheon, 24252, Republic of Korea
| | - Keun-Suh Kim
- Department of Periodontology, Section of Dentistry, Seoul National University Bundang Hospital, Seongnam, 13620, Republic of Korea
| | - Hyo-Jung Lee
- Department of Periodontology, Section of Dentistry, Seoul National University Bundang Hospital, Seongnam, 13620, Republic of Korea
| | - Ji Young Hong
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Hallym University College of Medicine, Chuncheon, 24252, Republic of Korea
| | - Yong-Jun Cho
- Department of Neurosurgery, Hallym University College of Medicine, Chuncheon, 24252, Republic of Korea
| | - Sung-Min Kang
- Department of Green Chemical Engineering, Sangmyung University, Cheonan, 31066, Republic of Korea.
| | - Jin Pyeong Jeon
- Department of Neurosurgery, Hallym University College of Medicine, Chuncheon, 24252, Republic of Korea.
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Browning BD, Kirkland AE, Green R, Liu H, Glover JS, Ticer TD, Engevik MA, Alekseyenko AV, Ferguson PL, Tomko RL, Squeglia LM. Adolescent alcohol use is associated with differences in the diversity and composition of the oral microbiome. ALCOHOL, CLINICAL & EXPERIMENTAL RESEARCH 2024; 48:1025-1035. [PMID: 38631877 PMCID: PMC11178446 DOI: 10.1111/acer.15331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 03/22/2024] [Accepted: 04/03/2024] [Indexed: 04/19/2024]
Abstract
BACKGROUND Adolescence is a sensitive stage of oral microbial development that often coincides with the initiation and escalation of alcohol use. Thus, adolescents may be particularly susceptible to alcohol-induced alterations in the oral microbiome, though minimal research has been done in this area. Understanding the connection between the oral microbiome and alcohol use during adolescence is important to understand fully the biological consequences of alcohol use to mitigate potential adverse outcomes. METHODS Saliva samples were collected from adolescents aged 17-19 who used alcohol heavily (n = 21, 52.4% female) and those who did not use alcohol or any other substances (n = 18, 44.4% female). We utilized 16S rRNA sequencing to examine differences in microbial diversity and composition between the groups. RESULTS For alpha diversity, evenness was significantly lower in the drinking group than the control group as indicated by Pielou's evenness, Shannon, and Simpson indices. There were no statistically significant findings for beta diversity. Differential abundance analyses revealed higher abundances of Rothia and Corynebacterium in the alcohol-using group using both centered-log-ratio and relative abundance normalization. These genera are known for their high capacity to convert alcohol into acetaldehyde, a toxic metabolite reported to play a role in the neurobiological effects of alcohol. An unclassified Clostridia UCG-014, Streptobacillus, Comamonas, unclassified Lachnospiraceae, and Parvimonas were also identified as significantly different between groups when using only one of the normalization techniques. CONCLUSIONS This is the first study designed specifically to compare the oral microbiome of adolescents who use alcohol with that of control participants. Our findings reveal distinct alcohol-related differences in microbial composition and taxon abundance, emphasizing the importance of understanding the impact on the oral microbiome of alcohol use during adolescence. Because the oral microbiome is malleable, this study provides foundational work for future prevention and intervention studies.
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Affiliation(s)
- Brittney D. Browning
- Department of Psychiatry and Behavioral Sciences, Medical University of South Carolina, Charleston, SC, USA
- Department of Neuroscience, Medical University of South Carolina, Charleston, SC, USA
| | - Anna E. Kirkland
- Department of Psychiatry and Behavioral Sciences, Medical University of South Carolina, Charleston, SC, USA
| | - Rejoyce Green
- Department of Psychiatry and Behavioral Sciences, Medical University of South Carolina, Charleston, SC, USA
| | - Helen Liu
- Department of Psychiatry and Behavioral Sciences, Medical University of South Carolina, Charleston, SC, USA
| | - Janiece S. Glover
- Department of Regenerative Medicine, Medical University of South Carolina, Charleston, SC, USA
| | - Taylor D. Ticer
- Department of Regenerative Medicine, Medical University of South Carolina, Charleston, SC, USA
| | - Mindy A. Engevik
- Department of Regenerative Medicine, Medical University of South Carolina, Charleston, SC, USA
| | | | - Pamela L. Ferguson
- Department of Public Health Sciences, Medical University of South Carolina, Charleston, SC, USA
| | - Rachel L. Tomko
- Department of Psychiatry and Behavioral Sciences, Medical University of South Carolina, Charleston, SC, USA
| | - Lindsay M. Squeglia
- Department of Psychiatry and Behavioral Sciences, Medical University of South Carolina, Charleston, SC, USA
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10
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Liu X, Liu Y, Liu J, Zhang H, Shan C, Guo Y, Gong X, Cui M, Li X, Tang M. Correlation between the gut microbiome and neurodegenerative diseases: a review of metagenomics evidence. Neural Regen Res 2024; 19:833-845. [PMID: 37843219 PMCID: PMC10664138 DOI: 10.4103/1673-5374.382223] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 04/19/2023] [Accepted: 06/17/2023] [Indexed: 10/17/2023] Open
Abstract
A growing body of evidence suggests that the gut microbiota contributes to the development of neurodegenerative diseases via the microbiota-gut-brain axis. As a contributing factor, microbiota dysbiosis always occurs in pathological changes of neurodegenerative diseases, such as Alzheimer's disease, Parkinson's disease, and amyotrophic lateral sclerosis. High-throughput sequencing technology has helped to reveal that the bidirectional communication between the central nervous system and the enteric nervous system is facilitated by the microbiota's diverse microorganisms, and for both neuroimmune and neuroendocrine systems. Here, we summarize the bioinformatics analysis and wet-biology validation for the gut metagenomics in neurodegenerative diseases, with an emphasis on multi-omics studies and the gut virome. The pathogen-associated signaling biomarkers for identifying brain disorders and potential therapeutic targets are also elucidated. Finally, we discuss the role of diet, prebiotics, probiotics, postbiotics and exercise interventions in remodeling the microbiome and reducing the symptoms of neurodegenerative diseases.
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Affiliation(s)
- Xiaoyan Liu
- School of Life Sciences, Jiangsu University, Zhenjiang, Jiangsu Province, China
| | - Yi Liu
- School of Life Sciences, Jiangsu University, Zhenjiang, Jiangsu Province, China
- Institute of Animal Husbandry, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu Province, China
| | - Junlin Liu
- School of Life Sciences, Jiangsu University, Zhenjiang, Jiangsu Province, China
| | - Hantao Zhang
- School of Life Sciences, Jiangsu University, Zhenjiang, Jiangsu Province, China
| | - Chaofan Shan
- School of Life Sciences, Jiangsu University, Zhenjiang, Jiangsu Province, China
| | - Yinglu Guo
- School of Life Sciences, Jiangsu University, Zhenjiang, Jiangsu Province, China
| | - Xun Gong
- Department of Rheumatology & Immunology, Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu Province, China
| | - Mengmeng Cui
- Department of Neurology, The Second Affiliated Hospital of Shandong First Medical University, Taian, Shandong Province, China
| | - Xiubin Li
- Department of Neurology, The Second Affiliated Hospital of Shandong First Medical University, Taian, Shandong Province, China
| | - Min Tang
- School of Life Sciences, Jiangsu University, Zhenjiang, Jiangsu Province, China
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11
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Hu C, Li H, Huang L, Wang R, Wang Z, Ma R, Chang B, Li S, Li H, Li G. Periodontal disease and risk of Alzheimer's disease: A two-sample Mendelian randomization. Brain Behav 2024; 14:e3486. [PMID: 38648391 PMCID: PMC11034860 DOI: 10.1002/brb3.3486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Revised: 03/11/2024] [Accepted: 03/17/2024] [Indexed: 04/25/2024] Open
Abstract
BACKGROUND Evidence from observational studies and clinical trials suggests an association between periodontal disease and Alzheimer's disease (AD). However, the causal relationship between periodontal disease and AD remains to be determined. METHODS We obtained periodontal disease data from the FinnGen database and two sets of AD data from the IEU consortium and PGC databases. Subsequently, we conducted a two-sample Mendelian randomization (MR) analysis to investigate the causal relationship between periodontal disease and AD. RESULTS The results of the random-effects IVW analysis revealed no evidence of a genetic causal relationship between periodontal disease and AD, regardless of whether the AD data from the IEU consortium or the AD data from the PGC database were utilized. No heterogeneity, multiple effects of levels, or outliers were observed in this study. CONCLUSIONS Our findings indicate that there is no causal relationship between periodontal disease and AD at the genetic level.
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Affiliation(s)
- Conglei Hu
- Graduate SchoolAir Force Medical UniversityXi'anChina
| | - Hui Li
- Department of Oral ImplantologyThe Affiliated Stomatological Hospital, Southwest Medical University, Luzhou Key Laboratory of Oral & Maxillofacial Reconstruction and RegenerationLuzhouChina
| | - Liping Huang
- Institute of StomatologySouthwest Medical UniversityLuzhouChina
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Oral Diseases, School of StomatologyAir Force Medical UniversityXi'anChina
| | - Rui Wang
- Department of Epidemiology and Statistics, School of Public HealthSouthwest Medical UniversityLuzhouChina
| | - Zeyu Wang
- Graduate SchoolAir Force Medical UniversityXi'anChina
| | - Rui Ma
- Graduate SchoolAir Force Medical UniversityXi'anChina
| | - Bei Chang
- Department of StomatologyThe PLA Rocket Force Characteristic Medical CenterBeijingChina
| | - Shiting Li
- Institute of StomatologySouthwest Medical UniversityLuzhouChina
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Oral Diseases, School of StomatologyAir Force Medical UniversityXi'anChina
| | - Hongcai Li
- Department of StomatologyShuguang Hospital Affiliated to Shanghai University of Traditional Chinese MedicineShanghaiChina
| | - Guangwen Li
- Institute of StomatologySouthwest Medical UniversityLuzhouChina
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Oral Diseases, School of StomatologyAir Force Medical UniversityXi'anChina
- Department of Medical Education, Tangdu HospitalAir Force Medical UniversityXi'anChina
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12
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Maki KA, Crayton CB, Butera G, Wallen GR. Examining the relationship between the oral microbiome, alcohol intake and alcohol-comorbid neuropsychological disorders: protocol for a scoping review. BMJ Open 2024; 14:e079823. [PMID: 38514150 PMCID: PMC10961520 DOI: 10.1136/bmjopen-2023-079823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 02/22/2024] [Indexed: 03/23/2024] Open
Abstract
INTRODUCTION Heavy alcohol use and alcohol use disorder (AUD) continues to rise as a public health problem and increases the risk for disease. Elevated rates of anxiety, depression, sleep disruption and stress are associated with alcohol use. Symptoms may progress to diagnosed neurophysiological conditions and increase risk for relapse if abstinence is attempted. Research on mechanisms connecting the gastrointestinal microbiome to neuropsychological disorders through the gut-brain axis is well-established. Less is known how the oral microbiome and oral microbial-associated biomarkers may signal to the brain. Therefore, a synthesis of research studying relationships between alcohol intake, alcohol-associated neurophysiological symptoms and the oral microbiome is needed to understand the state of the current science. In this paper, we outline our protocol to collect, evaluate and synthesise research focused on associations between alcohol intake and AUD-related neuropsychological disorders with the oral microbiome. METHODS AND ANALYSIS The search strategy was developed and will be executed in collaboration with a medical research librarian. Studies will be screened by two independent investigators according to the aim of the scoping review, along with the outlined exclusion and inclusion criteria. After screening, data will be extracted and synthesised from the included papers according to predefined demographic, clinical and microbiome methodology metrics. ETHICS AND DISSEMINATION A scoping review of primary sources is needed to synthesise the data on relationships between alcohol use, neuropsychological conditions associated with AUD and the oral microbiome. The proposed scoping review is based on the data from publicly available databases and does not require ethical approval. We expect the results of this synthesis will identify gaps in the growing literature and highlight potential mechanisms linking the oral-brain axis to addiction and other associated neuropsychological conditions. The study findings and results will be disseminated through journals and conferences related to psychology, neuroscience, dentistry and the microbiome.
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Affiliation(s)
- Katherine A Maki
- Clinical Center, Translational Biobehavioral and Health Disparities Branch, National Institutes of Health, Bethesda, Maryland, USA
| | - Chelsea B Crayton
- Clinical Center, Translational Biobehavioral and Health Disparities Branch, National Institutes of Health, Bethesda, Maryland, USA
| | - Gisela Butera
- Division of Library Services, National Institutes of Health, Bethesda, Maryland, USA
| | - Gwenyth R Wallen
- Clinical Center, Translational Biobehavioral and Health Disparities Branch, National Institutes of Health, Bethesda, Maryland, USA
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13
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Qiu C, Zhou W, Shen H, Wang J, Tang R, Wang T, Xie X, Hong B, Ren R, Wang G, Song Z. Profiles of subgingival microbiomes and gingival crevicular metabolic signatures in patients with amnestic mild cognitive impairment and Alzheimer's disease. Alzheimers Res Ther 2024; 16:41. [PMID: 38373985 PMCID: PMC10875772 DOI: 10.1186/s13195-024-01402-1] [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: 07/12/2023] [Accepted: 01/26/2024] [Indexed: 02/21/2024]
Abstract
BACKGROUND The relationship between periodontitis and Alzheimer's disease (AD) has attracted more attention recently, whereas profiles of subgingival microbiomes and gingival crevicular fluid (GCF) metabolic signatures in AD patients have rarely been characterized; thus, little evidence exists to support the oral-brain axis hypothesis. Therefore, our study aimed to characterize both the microbial community of subgingival plaque and the metabolomic profiles of GCF in patients with AD and amnestic mild cognitive impairment (aMCI) for the first time. METHODS This was a cross-sectional study. Clinical examinations were performed on all participants. The microbial community of subgingival plaque and the metabolomic profiles of GCF were characterized using the 16S ribosomal RNA (rRNA) gene high-throughput sequencing and liquid chromatography linked to tandem mass spectrometry (LC-MS/MS) analysis, respectively. RESULTS Thirty-two patients with AD, 32 patients with aMCI, and 32 cognitively normal people were enrolled. The severity of periodontitis was significantly increased in AD patients compared with aMCI patients and cognitively normal people. The 16S rRNA gene sequencing results showed that the relative abundances of 16 species in subgingival plaque were significantly correlated with cognitive function, and LC-MS/MS analysis identified a total of 165 differentially abundant metabolites in GCF. Moreover, multiomics Data Integration Analysis for Biomarker discovery using Latent cOmponents (DIABLO) analysis revealed that 19 differentially abundant metabolites were significantly correlated with Veillonella parvula, Dialister pneumosintes, Leptotrichia buccalis, Pseudoleptotrichia goodfellowii, and Actinomyces massiliensis, in which galactinol, sn-glycerol 3-phosphoethanolamine, D-mannitol, 1 h-indole-1-pentanoic acid, 3-(1-naphthalenylcarbonyl)- and L-iditol yielded satisfactory accuracy for the predictive diagnosis of AD progression. CONCLUSIONS This is the first combined subgingival microbiome and GCF metabolome study in patients with AD and aMCI, which revealed that periodontal microbial dysbiosis and metabolic disorders may be involved in the etiology and progression of AD, and the differential abundance of the microbiota and metabolites may be useful as potential markers for AD in the future.
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Affiliation(s)
- Che Qiu
- Department of Periodontology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine; College of Stomatology, Shanghai Jiao Tong University, Zhizaoju Road No.639, Huangpu District, Shanghai, 200011, People's Republic of China
- National Center for Stomatology; National Clinical Research Center for Oral Diseases; Shanghai Key Laboratory of Stomatology; Shanghai Research Institute of Stomatology, Zhizaoju Road No.639, Huangpu District, Shanghai, 200011, People's Republic of China
| | - Wei Zhou
- National Center for Stomatology; National Clinical Research Center for Oral Diseases; Shanghai Key Laboratory of Stomatology; Shanghai Research Institute of Stomatology, Zhizaoju Road No.639, Huangpu District, Shanghai, 200011, People's Republic of China
- Laboratory of Oral Microbiota and Systemic Diseases, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine; College of Stomatology, Shanghai Jiao Tong University, Jinzun Road No.115, Pudong District, Shanghai, 200125, People's Republic of China
| | - Hui Shen
- Department of Periodontology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine; College of Stomatology, Shanghai Jiao Tong University, Zhizaoju Road No.639, Huangpu District, Shanghai, 200011, People's Republic of China
- National Center for Stomatology; National Clinical Research Center for Oral Diseases; Shanghai Key Laboratory of Stomatology; Shanghai Research Institute of Stomatology, Zhizaoju Road No.639, Huangpu District, Shanghai, 200011, People's Republic of China
| | - Jintao Wang
- Department of Neurology and Institute of Neurology, Ruijin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Ruijin 2nd Road No.197, Huangpu District, Shanghai, 200025, People's Republic of China
| | - Ran Tang
- Department of Neurology and Institute of Neurology, Ruijin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Ruijin 2nd Road No.197, Huangpu District, Shanghai, 200025, People's Republic of China
| | - Tao Wang
- Department of Geriatric Psychiatry, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine and Alzheimer's Disease and Related Disorders Center, Shanghai Jiao Tong University, South Wanping Road No.600, Xuhui District, Shanghai, 200030, People's Republic of China
| | - Xinyi Xie
- Department of Periodontology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine; College of Stomatology, Shanghai Jiao Tong University, Zhizaoju Road No.639, Huangpu District, Shanghai, 200011, People's Republic of China
- National Center for Stomatology; National Clinical Research Center for Oral Diseases; Shanghai Key Laboratory of Stomatology; Shanghai Research Institute of Stomatology, Zhizaoju Road No.639, Huangpu District, Shanghai, 200011, People's Republic of China
| | - Bo Hong
- Department of Geriatric Psychiatry, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine and Alzheimer's Disease and Related Disorders Center, Shanghai Jiao Tong University, South Wanping Road No.600, Xuhui District, Shanghai, 200030, People's Republic of China
| | - Rujing Ren
- Department of Neurology and Institute of Neurology, Ruijin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Ruijin 2nd Road No.197, Huangpu District, Shanghai, 200025, People's Republic of China
| | - Gang Wang
- Department of Neurology and Institute of Neurology, Ruijin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Ruijin 2nd Road No.197, Huangpu District, Shanghai, 200025, People's Republic of China.
| | - Zhongchen Song
- Department of Periodontology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine; College of Stomatology, Shanghai Jiao Tong University, Zhizaoju Road No.639, Huangpu District, Shanghai, 200011, People's Republic of China.
- National Center for Stomatology; National Clinical Research Center for Oral Diseases; Shanghai Key Laboratory of Stomatology; Shanghai Research Institute of Stomatology, Zhizaoju Road No.639, Huangpu District, Shanghai, 200011, People's Republic of China.
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14
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Troci A, Philippen S, Rausch P, Rave J, Weyland G, Niemann K, Jessen K, Schmill LP, Aludin S, Franke A, Berg D, Bang C, Bartsch T. Disease- and stage-specific alterations of the oral and fecal microbiota in Alzheimer's disease. PNAS NEXUS 2024; 3:pgad427. [PMID: 38205031 PMCID: PMC10776369 DOI: 10.1093/pnasnexus/pgad427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 11/30/2023] [Indexed: 01/12/2024]
Abstract
Microbial communities in the intestinal tract are suggested to impact the ethiopathogenesis of Alzheimer's disease (AD). The human microbiome might modulate neuroinflammatory processes and contribute to neurodegeneration in AD. However, the microbial compositions in patients with AD at different stages of the disease are still not fully characterized. We used 16S rRNA analyses to investigate the oral and fecal microbiota in patients with AD and mild cognitive impairment (MCI; n = 84), at-risk individuals (APOE4 carriers; n = 17), and healthy controls (n = 50) and investigated the relationship of microbial communities and disease-specific markers via multivariate- and network-based approaches. We found a slightly decreased diversity in the fecal microbiota of patients with AD (average Chao1 diversity for AD = 212 [SD = 66]; for controls = 215 [SD = 55]) and identified differences in bacterial abundances including Bacteroidetes, Ruminococcus, Sutterella, and Porphyromonadaceae. The diversity in the oral microbiota was increased in patients with AD and at-risk individuals (average Chao1 diversity for AD = 174 [SD = 60], for at-risk group = 195 [SD = 49]). Gram-negative proinflammatory bacteria including Haemophilus, Neisseria, Actinobacillus, and Porphyromonas were dominant oral bacteria in patients with AD and MCI and the abundance correlated with the cerebrospinal fluid biomarker. Taken together, we observed a strong shift in the fecal and the oral communities of patients with AD already prominent in prodromal and, in case of the oral microbiota, in at-risk stages. This indicates stage-dependent alterations in oral and fecal microbiota in AD which may contribute to the pathogenesis via a facilitated intestinal and systemic inflammation leading to neuroinflammation and neurodegeneration.
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Affiliation(s)
- Alba Troci
- Institute of Clinical Molecular Biology, Kiel University, Kiel, Germany
| | - Sarah Philippen
- Department of Neurology, Memory Disorders and Plasticity Group, University Hospital Schleswig-Holstein, Kiel 24105, Germany
| | - Philipp Rausch
- Institute of Clinical Molecular Biology, Kiel University, Kiel, Germany
| | - Julius Rave
- Department of Neurology, Memory Disorders and Plasticity Group, University Hospital Schleswig-Holstein, Kiel 24105, Germany
| | - Gina Weyland
- Department of Neurology, Memory Disorders and Plasticity Group, University Hospital Schleswig-Holstein, Kiel 24105, Germany
| | - Katharina Niemann
- Department of Neurology, Memory Disorders and Plasticity Group, University Hospital Schleswig-Holstein, Kiel 24105, Germany
| | - Katharina Jessen
- Department of Neurology, Memory Disorders and Plasticity Group, University Hospital Schleswig-Holstein, Kiel 24105, Germany
| | - Lars-Patrick Schmill
- Department of Radiology and Neuroradiology, University Hospital Schleswig-Holstein, Kiel 24105, Germany
| | - Schekeb Aludin
- Department of Radiology and Neuroradiology, University Hospital Schleswig-Holstein, Kiel 24105, Germany
| | - Andre Franke
- Institute of Clinical Molecular Biology, Kiel University, Kiel, Germany
| | - Daniela Berg
- Department of Neurology, Memory Disorders and Plasticity Group, University Hospital Schleswig-Holstein, Kiel 24105, Germany
| | - Corinna Bang
- Institute of Clinical Molecular Biology, Kiel University, Kiel, Germany
| | - Thorsten Bartsch
- Department of Neurology, Memory Disorders and Plasticity Group, University Hospital Schleswig-Holstein, Kiel 24105, Germany
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15
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Pruntel SM, van Munster BC, de Vries JJ, Vissink A, Visser A. Oral Health as a Risk Factor for Alzheimer Disease. J Prev Alzheimers Dis 2024; 11:249-258. [PMID: 38230738 PMCID: PMC10994994 DOI: 10.14283/jpad.2023.82] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Accepted: 06/05/2023] [Indexed: 01/18/2024]
Abstract
In patients with Alzheimer's disease pathophysiological changes of the brain that initiate the onset of Alzheimer's disease include accumulation of amyloid-β plaques and phosphorylation of tau-tangles. A rather recently considered risk factor for the onset of Alzheimer's disease is poor oral health. The aim of this systematic review of the literature was to assess the potential association(s) of oral health as a risk factor for the onset of Alzheimer's disease. After a systematic search of Pubmed, Embase and Web of Science. A total of 1962 studies were assessed, of which 17 studies demonstrated possible associations between oral health diseases and Alzheimer's disease. 4 theories could be distinguished that describe the possible links between oral health and the development or onset of Alzheimer's disease; 1) role of pathogens, 2) role of inflammatory mediators, 3) role of APOE alleles and 4) role of Aβ peptide. The main common denominator of all the theories is the neuroinflammation due to poor oral health. Yet, there is insufficient evidence to prove a link due to the diversity of the designs used and the quality of the study design of the included studies. Therefore, further research is needed to find causal links between oral health and neuroinflammation that possibly can lead to the onset of Alzheimer's disease with the future intention to prevent cognitive decline by better dental care.
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Affiliation(s)
- S M Pruntel
- Anita Visser, Department of Gerodontology, Center for Dentistry and Oral Hygiene, University Medical Center Groningen and University of Groningen, Antonius Deusinglaan 1, Groningen, Groningen, 9713 AV, The Netherlands, Tel: 050 361 3840, E-mail:
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16
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Zhang M, Niu H, Li Q, Jiao L, Li H, Wu W. Active Compounds of Panax ginseng in the Improvement of Alzheimer's Disease and Application of Spatial Metabolomics. Pharmaceuticals (Basel) 2023; 17:38. [PMID: 38256872 PMCID: PMC10818864 DOI: 10.3390/ph17010038] [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: 11/13/2023] [Revised: 12/14/2023] [Accepted: 12/24/2023] [Indexed: 01/24/2024] Open
Abstract
Panax ginseng C.A. Meyer (P. ginseng) is one of the more common traditional Chinese medicines (TCMs). It contains numerous chemical components and exhibits a range of pharmacological effects. An enormous burden is placed on people's health and life by Alzheimer's disease (AD), a neurodegenerative condition. Recent research has shown that P. ginseng's chemical constituents, particularly ginsenosides, have a significant beneficial impact on the prevention and management of neurological disorders. To understand the current status of research on P. ginseng to improve AD, this paper discusses the composition of P. ginseng, its mechanism of action, and its clinical application. The pathogenesis of AD includes amyloid beta protein (Aβ) generation and aggregation, tau protein hyperphosphorylation, oxidant stress, neuroinflammation, mitochondrial damage, and neurotransmitter and gut microbiota disorders. This review presents the key molecular mechanisms and signaling pathways of the active ingredients in P. ginseng involved in improving AD from the perspective of AD pathogenesis. A P. ginseng-related signaling pathway network was constructed to provide effective targets for the treatment of AD. In addition, the application of spatial metabolomics techniques in studying P. ginseng and AD is discussed. In summary, this paper discusses research perspectives for the study of P. ginseng in the treatment of AD, including a systematic and in-depth review of the mechanisms of action of the active substances in P. ginseng, and evaluates the feasibility of applying spatial metabolomics in the study of AD pathogenesis and pharmacological treatment.
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Affiliation(s)
| | | | | | | | - Hui Li
- Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun 130117, China; (M.Z.); (H.N.); (Q.L.); (L.J.)
| | - Wei Wu
- Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun 130117, China; (M.Z.); (H.N.); (Q.L.); (L.J.)
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17
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Ji X, Li P, Guo Q, Guan L, Gao P, Wu B, Cheng H, Xiao J, Ye L. Salivary microbiome profiles for different clinical phenotypes of pituitary adenomas by single-molecular long-read sequencing. Microbiol Spectr 2023; 11:e0023423. [PMID: 37800955 PMCID: PMC10715156 DOI: 10.1128/spectrum.00234-23] [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: 01/14/2023] [Accepted: 08/21/2023] [Indexed: 10/07/2023] Open
Abstract
IMPORTANCE The gut and salivary microbiomes have been widely reported to be significantly associated with a number of neurological disorders. The stability of the microbiome in the oral cavity makes it a potentially ideal sample that can be conveniently obtained for the investigation of microbiome-based pathogenesis in diseases. In the present study, we used a single-molecule long-read sequencing technique to study the distribution of the salivary microbiota in patients with pituitary adenoma (PA) and healthy individuals, as well as among four clinical phenotypes of PA. We found that the diversity of salivary microbes was more abundant in PA patients than in healthy individuals. We also observed some unique genera in different PA phenotypes. The bioinformatics-based functional predictions identified potential links between microbes and different clinical phenotypes of PA. This study improves the existing understanding of the pathogenesis of PA and may provide diagnostic and therapeutic targets for PA.
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Affiliation(s)
- Xuefei Ji
- Department of Neurosurgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Pingping Li
- Department of Neurosurgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Qinglong Guo
- Department of Neurosurgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Liao Guan
- Department of Neurosurgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Peng Gao
- Department of Neurosurgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Bingshan Wu
- Department of Neurosurgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Hongwei Cheng
- Department of Neurosurgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Jin Xiao
- Department of Neurosurgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Lei Ye
- Department of Neurosurgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
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18
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Phuna ZX, Madhavan P. A reappraisal on amyloid cascade hypothesis: the role of chronic infection in Alzheimer's disease. Int J Neurosci 2023; 133:1071-1089. [PMID: 35282779 DOI: 10.1080/00207454.2022.2045290] [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: 09/01/2020] [Accepted: 02/09/2022] [Indexed: 10/18/2022]
Abstract
Alzheimer disease (AD) is a progressive neurological disorder that accounted for the most common cause of dementia in the elderly population. Lately, 'infection hypothesis' has been proposed where the infection of microbes can lead to the pathogenesis of AD. Among different types of microbes, human immunodeficiency virus-1 (HIV-1), herpes simplex virus-1 (HSV-1), Chlamydia pneumonia, Spirochetes and Candida albicans are frequently detected in the brain of AD patients. Amyloid-beta protein has demonstrated to exhibit antimicrobial properties upon encountering these pathogens. It can bind to microglial cells and astrocytes to activate immune response and neuroinflammation. Nevertheless, HIV-1 and HSV-1 can develop into latency whereas Chlamydia pneumonia, Spirochetes and Candida albicans can cause chronic infections. At this stage, the DNA of microbes remains undetectable yet active. This can act as the prolonged pathogenic stimulus that over-triggers the expression of Aβ-related genes, which subsequently lead to overproduction and deposition of Aβ plaque. This review will highlight the pathogenesis of each of the stated microbial infection, their association in AD pathogenesis as well as the effect of chronic infection in AD progression. Potential therapies for AD by modulating the microbiome have also been suggested. This review will aid in understanding the infectious manifestations of AD.
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Affiliation(s)
- Zhi Xin Phuna
- School of Medicine, Faculty of Health and Medical Sciences, Taylor's University, Selangor, Malaysia
| | - Priya Madhavan
- School of Medicine, Faculty of Health and Medical Sciences, Taylor's University, Selangor, Malaysia
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19
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Bello-Corral L, Alves-Gomes L, Fernández-Fernández JA, Fernández-García D, Casado-Verdejo I, Sánchez-Valdeón L. Implications of gut and oral microbiota in neuroinflammatory responses in Alzheimer's disease. Life Sci 2023; 333:122132. [PMID: 37793482 DOI: 10.1016/j.lfs.2023.122132] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 09/26/2023] [Accepted: 09/27/2023] [Indexed: 10/06/2023]
Abstract
A diverse and stable microbiota promotes a healthy state, nevertheless, an imbalance in gut or oral bacterial composition, called dysbiosis, can cause gastrointestinal disorders, systemic inflammatory states and oxidative stress, among others. Recently, gut and oral dysbiosis has been linked to Alzheimer's disease (AD), which is considered the most common form of dementia and a public health priority due to its high prevalence and incidence. The aim of this review is to highlight the implications of gut and oral microbiota in the neuroinflammation characteristic of AD pathology and the subsequent cognitive impairment. It is a systematic review of the current literature obtained by searching the PubMed, Web of Science and Scopus databases. The characteristic intestinal dysbiosis in AD patients leads to increased permeability of the intestinal barrier and activates immune cells in the central nervous system due to translocation of microbiota-derived metabolites and/or bacteria into the circulation leading to increased neuroinflammation and neuronal loss, thus generating the cognitive impairment characteristic of AD. The presence in the central nervous system of Porphyromonas gingivalis can cause an increased neuroinflammation and beta-amyloid peptide accumulation.
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Affiliation(s)
- Laura Bello-Corral
- Health Research Nursing Group (GREIS), University of Leon, 24071, Leon, Spain; Department of Nursing and Physiotherapy, University of Leon, 24071, Leon, Spain
| | | | - Jesús Antonio Fernández-Fernández
- Health Research Nursing Group (GREIS), University of Leon, 24071, Leon, Spain; Department of Nursing and Physiotherapy, University of Leon, 24071, Leon, Spain
| | - Daniel Fernández-García
- Health Research Nursing Group (GREIS), University of Leon, 24071, Leon, Spain; Department of Nursing and Physiotherapy, University of Leon, 24071, Leon, Spain
| | - Inés Casado-Verdejo
- Health Research Nursing Group (GREIS), University of Leon, 24071, Leon, Spain; Department of Nursing and Physiotherapy, University of Leon, 24401, Ponferrada, Spain
| | - Leticia Sánchez-Valdeón
- Health Research Nursing Group (GREIS), University of Leon, 24071, Leon, Spain; Department of Nursing and Physiotherapy, University of Leon, 24071, Leon, Spain.
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20
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Franciotti R, Pignatelli P, D’Antonio DL, Mancinelli R, Fulle S, De Rosa MA, Puca V, Piattelli A, Thomas AM, Onofrj M, Sensi SL, Curia MC. The Immune System Response to Porphyromonas gingivalis in Neurological Diseases. Microorganisms 2023; 11:2555. [PMID: 37894213 PMCID: PMC10609495 DOI: 10.3390/microorganisms11102555] [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: 07/31/2023] [Revised: 10/03/2023] [Accepted: 10/10/2023] [Indexed: 10/29/2023] Open
Abstract
Previous studies have reported an association between oral microbial dysbiosis and the development and progression of pathologies in the central nervous system. Porphyromonas gingivalis (Pg), the keystone pathogen of the oral cavity, can induce a systemic antibody response measured in patients' sera using enzyme-linked immunosorbent assays. The present case-control study quantified the immune system's response to Pg abundance in the oral cavities of patients affected by different central nervous system pathologies. The study cohort included 87 participants: 23 healthy controls (HC), 17 patients with an acute neurological condition (N-AC), 19 patients with a chronic neurological condition (N-CH), and 28 patients with neurodegenerative disease (N-DEG). The results showed that the Pg abundance in the oral cavity was higher in the N-DEG patients than in the HC (p = 0.0001) and N-AC patients (p = 0.01). In addition, the Pg abundance was higher in the N-CH patients than the HCs (p = 0.005). Only the N-CH patients had more serum anti-Pg antibodies than the HC (p = 0.012). The inadequate response of the immune system of the N-DEG group in producing anti-Pg antibodies was also clearly indicated by an analysis of the ratio between the anti-Pg antibodies quantity and the Pg abundance. Indeed, this ratio was significantly lower between the N-DEG group than all other groups (p = 0.0001, p = 0.002, and p = 0.03 for HC, N-AC, and N-CH, respectively). The immune system's response to Pg abundance in the oral cavity showed a stepwise model: the response diminished progressively from the patients affected with an acute condition to the patients suffering from chronic nervous system disorders and finally to the patients affected by neurodegenerative diseases.
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Affiliation(s)
- Raffaella Franciotti
- Department of Neuroscience, Imaging and Clinical Science, G. d’Annunzio University of Chieti-Pescara, 66100 Chieti, Italy; (R.M.); (S.F.); (M.A.D.R.); (A.M.T.); (M.O.); (S.L.S.)
| | - Pamela Pignatelli
- COMDINAV DUE, Nave Cavour, Italian Navy, Stazione Navale Mar Grande, Viale Jonio, 74122 Taranto, Italy;
| | - Domenica Lucia D’Antonio
- Department of Medical, Oral and Biotechnological Sciences, G. d’Annunzio University of Chieti-Pescara, 66100 Chieti, Italy; (D.L.D.); (M.C.C.)
- Fondazione Villaserena per la Ricerca, 65013 Città Sant’Angelo, Pescara, Italy
| | - Rosa Mancinelli
- Department of Neuroscience, Imaging and Clinical Science, G. d’Annunzio University of Chieti-Pescara, 66100 Chieti, Italy; (R.M.); (S.F.); (M.A.D.R.); (A.M.T.); (M.O.); (S.L.S.)
| | - Stefania Fulle
- Department of Neuroscience, Imaging and Clinical Science, G. d’Annunzio University of Chieti-Pescara, 66100 Chieti, Italy; (R.M.); (S.F.); (M.A.D.R.); (A.M.T.); (M.O.); (S.L.S.)
| | - Matteo Alessandro De Rosa
- Department of Neuroscience, Imaging and Clinical Science, G. d’Annunzio University of Chieti-Pescara, 66100 Chieti, Italy; (R.M.); (S.F.); (M.A.D.R.); (A.M.T.); (M.O.); (S.L.S.)
- Center for Advanced Studies and Technology (CAST), G. d’Annunzio University of Chieti-Pescara, 66100 Chieti, Italy
| | - Valentina Puca
- Department of Pharmacy, G. d’Annunzio University of Chieti-Pescara, 66100 Chieti, Italy;
| | - Adriano Piattelli
- School of Dentistry, Saint Camillus International University for Health Sciences, 00131 Rome, Italy;
- Facultad de Medicina, UCAM Universidad Católica San Antonio de Murcia, Guadalupe, 30107 Murcia, Spain
| | - Astrid Maria Thomas
- Department of Neuroscience, Imaging and Clinical Science, G. d’Annunzio University of Chieti-Pescara, 66100 Chieti, Italy; (R.M.); (S.F.); (M.A.D.R.); (A.M.T.); (M.O.); (S.L.S.)
- Center for Advanced Studies and Technology (CAST), G. d’Annunzio University of Chieti-Pescara, 66100 Chieti, Italy
| | - Marco Onofrj
- Department of Neuroscience, Imaging and Clinical Science, G. d’Annunzio University of Chieti-Pescara, 66100 Chieti, Italy; (R.M.); (S.F.); (M.A.D.R.); (A.M.T.); (M.O.); (S.L.S.)
- Center for Advanced Studies and Technology (CAST), G. d’Annunzio University of Chieti-Pescara, 66100 Chieti, Italy
| | - Stefano Luca Sensi
- Department of Neuroscience, Imaging and Clinical Science, G. d’Annunzio University of Chieti-Pescara, 66100 Chieti, Italy; (R.M.); (S.F.); (M.A.D.R.); (A.M.T.); (M.O.); (S.L.S.)
- Center for Advanced Studies and Technology (CAST), G. d’Annunzio University of Chieti-Pescara, 66100 Chieti, Italy
- Institute for Advanced Biomedical Technologies, G. d’Annunzio University of Chieti-Pescara, 66100 Chieti, Italy
| | - Maria Cristina Curia
- Department of Medical, Oral and Biotechnological Sciences, G. d’Annunzio University of Chieti-Pescara, 66100 Chieti, Italy; (D.L.D.); (M.C.C.)
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21
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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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22
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Gerace E, Baldi S, Salimova M, Di Gloria L, Curini L, Cimino V, Nannini G, Russo E, Pallecchi M, Ramazzotti M, Bartolucci G, Occupati B, Lanzi C, Scarpino M, Lanzo G, Grippo A, Lolli F, Mannaioni G, Amedei A. Oral and fecal microbiota perturbance in cocaine users: Can rTMS-induced cocaine abstinence support eubiosis restoration? iScience 2023; 26:106627. [PMID: 37250301 PMCID: PMC10214473 DOI: 10.1016/j.isci.2023.106627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 03/09/2023] [Accepted: 03/31/2023] [Indexed: 05/31/2023] Open
Abstract
The effects of cocaine on microbiota have been scarcely explored. Here, we investigated the gut (GM) and oral (OM) microbiota composition of cocaine use disorder (CUD) patients and the effects of repetitive transcranial magnetic stimulation (rTMS). 16S rRNA sequencing was used to characterize GM and OM, whereas PICRUST2 assessed functional changes in microbial communities, and gas-chromatography was used to evaluate fecal short and medium chain fatty acids. CUD patients reported a significant decrease in alpha diversity and modification of the abundances of several taxa in both GM and OM. Furthermore, many predicted metabolic pathways were differentially expressed in CUD patients' stool and saliva samples, as well as reduced levels of butyric acid that appear restored to normal amounts after rTMS treatment. In conclusion, CUD patients showed a profound dysbiotic fecal and oral microbiota composition and function and rTMS-induced cocaine abstinence determined the restoration of eubiotic microbiota.
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Affiliation(s)
- Elisabetta Gerace
- Department of Neuroscience, Psychology, Drug Research and Child Health NEUROFARBA, University of Florence, 50139 Florence, Italy
- Department of Health Sciences, Clinical Pharmacology and Oncology Unit, University of Florence, 50139 Florence, Italy
| | - Simone Baldi
- Department of Experimental and Clinical Medicine, University of Florence, 50134 Florence, Italy
| | - Maya Salimova
- Azienda Ospedaliera Universitaria di Careggi, Clinical Toxicology and Poison Control Centre, 50134 Florence, Italy
| | - Leandro Di Gloria
- Department of Biomedical, Experimental and Clinical Sciences “Mario Serio”, University of Florence, 50134 Florence, Italy
| | - Lavinia Curini
- Department of Experimental and Clinical Medicine, University of Florence, 50134 Florence, Italy
| | - Virginia Cimino
- Department of Neuroscience, Psychology, Drug Research and Child Health NEUROFARBA, University of Florence, 50139 Florence, Italy
| | - Giulia Nannini
- Department of Experimental and Clinical Medicine, University of Florence, 50134 Florence, Italy
| | - Edda Russo
- Department of Experimental and Clinical Medicine, University of Florence, 50134 Florence, Italy
| | - Marco Pallecchi
- Department of Neuroscience, Psychology, Drug Research and Child Health NEUROFARBA, University of Florence, 50139 Florence, Italy
| | - Matteo Ramazzotti
- Department of Biomedical, Experimental and Clinical Sciences “Mario Serio”, University of Florence, 50134 Florence, Italy
| | - Gianluca Bartolucci
- Department of Neuroscience, Psychology, Drug Research and Child Health NEUROFARBA, University of Florence, 50139 Florence, Italy
| | - Brunella Occupati
- Azienda Ospedaliera Universitaria di Careggi, Clinical Toxicology and Poison Control Centre, 50134 Florence, Italy
| | - Cecilia Lanzi
- Azienda Ospedaliera Universitaria di Careggi, Clinical Toxicology and Poison Control Centre, 50134 Florence, Italy
| | - Maenia Scarpino
- Azienda Ospedaliera Universitaria di Careggi, Neurophysiology Unit, 50134 Florence, Italy
| | - Giovanni Lanzo
- Azienda Ospedaliera Universitaria di Careggi, Neurophysiology Unit, 50134 Florence, Italy
| | - Antonello Grippo
- Azienda Ospedaliera Universitaria di Careggi, Neurophysiology Unit, 50134 Florence, Italy
| | - Francesco Lolli
- Department of Biomedical, Experimental and Clinical Sciences “Mario Serio”, University of Florence, 50134 Florence, Italy
| | - Guido Mannaioni
- Department of Neuroscience, Psychology, Drug Research and Child Health NEUROFARBA, University of Florence, 50139 Florence, Italy
- Azienda Ospedaliera Universitaria di Careggi, Clinical Toxicology and Poison Control Centre, 50134 Florence, Italy
| | - Amedeo Amedei
- Department of Experimental and Clinical Medicine, University of Florence, 50134 Florence, Italy
- Interdisciplinary Internal Medicine Unit, Careggi University Hospital, 50134 Florence, Italy
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23
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Tan X, Wang Y, Gong T. The interplay between oral microbiota, gut microbiota and systematic diseases. J Oral Microbiol 2023; 15:2213112. [PMID: 37200866 PMCID: PMC10187086 DOI: 10.1080/20002297.2023.2213112] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 05/02/2023] [Accepted: 05/08/2023] [Indexed: 05/20/2023] Open
Abstract
Over the past two decades, the importance of microbiota in health and disease has become evident. The human gut microbiota and oral microbiota are the largest and second-largest microbiome in the human body, respectively, and they are physically connected as the oral cavity is the beginning of the digestive system. Emerging and exciting evidence has shown complex and important connections between gut microbiota and oral microbiota. The interplay of the two microbiomes may contribute to the pathological processes of many diseases, including diabetes, rheumatoid arthritis, nonalcoholic fatty liver disease, inflammatory bowel disease, pancreatic cancer, colorectal cancer, and so on. In this review, we discuss possible routes and factors of oral microbiota to affect gut microbiota, and the contribution of this interplay between oral and gut microbiota to systemic diseases. Although most studies are association studies, recently, there have been increasing mechanistic investigations. This review aims to enhance the interest in the connection between oral and gut microbiota, and shows the tangible impact of this connection on human health.
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Affiliation(s)
- Xiujun Tan
- Stomatological Hospital of Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing, China
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, China
| | - Yizhong Wang
- Department of Research & Development, Zhejiang Charioteer Pharmaceutical CO. LTD, Taizhou, China
| | - Ting Gong
- Stomatological Hospital of Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing, China
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, China
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24
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Molinero N, Antón-Fernández A, Hernández F, Ávila J, Bartolomé B, Moreno-Arribas MV. Gut Microbiota, an Additional Hallmark of Human Aging and Neurodegeneration. Neuroscience 2023; 518:141-161. [PMID: 36893982 DOI: 10.1016/j.neuroscience.2023.02.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Revised: 02/10/2023] [Accepted: 02/19/2023] [Indexed: 03/09/2023]
Abstract
Gut microbiota represents a diverse and dynamic population of microorganisms harbouring the gastrointestinal tract, which influences host health and disease. Bacterial colonization of the gastrointestinal tract begins at birth and changes throughout life, with age being one of the conditioning factors for its vitality. Aging is also a primary risk factor for most neurodegenerative diseases. Among them, Alzheimeŕs disease (AD) is probably the one where its association with a state of dysbiosis of the gut microbiota has been most studied. In particular, intestinal microbial-derived metabolites have been associated with β-amyloid formation and brain amyloid deposition, tau phosphorylation, as well as neuroinflammation in AD patients. Moreover, it has been suggested that some oral bacteria increase the risk of developing AD. However, the causal connections among microbiome, amyloid-tau interaction, and neurodegeneration need to be addressed. This paper summarizes the emerging evidence in the literature regarding the link between the oral and gut microbiome and neurodegeneration with a focus on AD. Taxonomic features of bacteria as well as microbial functional alterations associated with AD biomarkers are the main points reviewed. Data from clinical studies as well as the link between microbiome and clinical determinants of AD are particularly emphasized. Further, relationships between gut microbiota and age-dependent epigenetic changes and other neurological disorders are also described. Together, all this evidence suggests that, in some sense, gut microbiota can be seen as an additional hallmark of human aging and neurodegeneration.
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Affiliation(s)
- Natalia Molinero
- Instituto de Investigación en Ciencias de la Alimentación (CIAL), CSIC-UAM. c/ Nicolás Cabrera, 9. 28049 Madrid, Spain
| | - Alejandro Antón-Fernández
- Centro de Biología Molecular Severo Ochoa (CBMSO), CSIC-UAM. c/ Nicolás Cabrera, 1. 28049 Madrid, Spain
| | - Félix Hernández
- Centro de Biología Molecular Severo Ochoa (CBMSO), CSIC-UAM. c/ Nicolás Cabrera, 1. 28049 Madrid, Spain
| | - Jesús Ávila
- Centro de Biología Molecular Severo Ochoa (CBMSO), CSIC-UAM. c/ Nicolás Cabrera, 1. 28049 Madrid, Spain
| | - Begoña Bartolomé
- Instituto de Investigación en Ciencias de la Alimentación (CIAL), CSIC-UAM. c/ Nicolás Cabrera, 9. 28049 Madrid, Spain
| | - M Victoria Moreno-Arribas
- Instituto de Investigación en Ciencias de la Alimentación (CIAL), CSIC-UAM. c/ Nicolás Cabrera, 9. 28049 Madrid, Spain.
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25
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Fogelholm N, Leskelä J, Manzoor M, Holmer J, Paju S, Hiltunen K, Roitto HM, Saarela RK, Pitkälä K, Eriksdotter M, Buhlin K, Pussinen PJ, Mäntylä P. Subgingival microbiome at different levels of cognition. J Oral Microbiol 2023; 15:2178765. [PMID: 36844899 PMCID: PMC9946326 DOI: 10.1080/20002297.2023.2178765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023] Open
Abstract
Oral health and declining cognition may have a bi-directional association. We characterized the subgingival microbiota composition of subjects from normal cognition to severe cognitive decline in two cohorts. Memory and Periodontitis (MINOPAR) include 202 home-living participants (50-80 years) in Sweden. Finnish Oral Health Studies in Older Adults (FINORAL) include 174 participants (≥65 years) living in long-term care in Finland. We performed oral examination and assessed the cognitive level with Mini Mental State Examination (MMSE). We sequenced the 16S-rRNA gene (V3-V4 regions) to analyse the subgingival bacterial compositions. The microbial diversities only tended to differ between the MMSE categories, and the strongest determinants were increased probing pocket depth (PPD) and presence of caries. However, abundances of 101 taxa were associated with the MMSE score. After adjusting for age, sex, medications, PPD, and caries, only eight taxa retained the significance in the meta-analyses of the two cohorts. Especially Lachnospiraceae [XIV] at the family, genus, and species level increased with decreasing MMSE. Cognitive decline is associated with obvious changes in the composition of the oral microbiota. Impaired cognition is accompanied with poor oral health status and the appearance of major taxa of the gut microbiota in the oral cavity. Good oral health-care practices require special deliberations among older adults.
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Affiliation(s)
- Nele Fogelholm
- Department of Oral and Maxillofacial Diseases, University of Helsinki, Helsinki, Finland
| | - Jaakko Leskelä
- Department of Oral and Maxillofacial Diseases, University of Helsinki, Helsinki, Finland
| | - Muhammed Manzoor
- Department of Oral and Maxillofacial Diseases, University of Helsinki, Helsinki, Finland
| | - Jacob Holmer
- Division of Periodontology, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden
| | - Susanna Paju
- Department of Oral and Maxillofacial Diseases, University of Helsinki, Helsinki, Finland
| | - Kaija Hiltunen
- Department of Oral and Maxillofacial Diseases, University of Helsinki, Helsinki, Finland
| | - Hanna-Maria Roitto
- Department of Neurosciences, University of Helsinki, Helsinki, Finland.,Internal medicine and rehabilitation, Division of Geriatrics, Helsinki University Hospital Helsinki, Finland.,Population health unit, Finnish Institute for Health and Welfare, Helsinki, Finland
| | - Riitta Kt Saarela
- Department of Social Services and Health Care, Oral Health Care, Helsinki, Finland
| | - Kaisu Pitkälä
- Department of General Practice and Primary Health Care, University of Helsinki, Helsinki, Finland.,Unit of Primary Health Care, Helsinki University Hospital, Helsinki, Finland
| | - Maria Eriksdotter
- Division of Clinical Geriatrics, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Huddinge, Sweden.,Theme Inflammation and Aging, Karolinska University Hospital, Huddinge, Sweden
| | - Kåre Buhlin
- Department of Oral and Maxillofacial Diseases, University of Helsinki, Helsinki, Finland.,Division of Periodontology, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden
| | - Pirkko J Pussinen
- Department of Oral and Maxillofacial Diseases, University of Helsinki, Helsinki, Finland.,School of Medicine, Institute of Dentistry, University of Eastern Finland, Kuopio, Finland
| | - Päivi Mäntylä
- School of Medicine, Institute of Dentistry, University of Eastern Finland, Kuopio, Finland.,Oral and Maxillofacial Diseases, Kuopio University Hospital, Kuopio, Finland
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26
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Chen BY, Lin WZ, Li YL, Bi C, Du LJ, Liu Y, Zhou LJ, Liu T, Xu S, Shi CJ, Zhu H, Wang YL, Sun JY, Liu Y, Zhang WC, Zhang Z, Zhang HL, Zhu YQ, Duan SZ. Characteristics and Correlations of the Oral and Gut Fungal Microbiome with Hypertension. Microbiol Spectr 2023; 11:e0195622. [PMID: 36475759 PMCID: PMC9927468 DOI: 10.1128/spectrum.01956-22] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 11/09/2022] [Indexed: 12/13/2022] Open
Abstract
The mycobiome is an essential constituent of the human microbiome and is associated with various diseases. However, the role of oral and gut fungi in hypertension (HTN) remains largely unexplored. In this study, saliva, subgingival plaques, and feces were collected from 36 participants with HTN and 24 healthy controls for metagenomic sequencing. The obtained sequences were analyzed using the Kraken2 taxonomic annotation pipeline to assess fungal composition and diversity. Correlations between oral and gut fungi and clinic parameters, between fungi within the same sample types, and between different sample types were identified by Spearman's correlation analysis. Overall, the subgingival fungal microbiome had substantially higher alpha diversity than the salivary and fecal fungal microbiomes. The fungal microbiomes of the three sample types displayed distinct beta diversity from each other. Oral fungi but not gut fungi in HTN had beta diversity significantly different from that of controls. Among the fungi shared in the oral cavity and gut, Exophiala was the genus with the most notable changes. Exophiala spinifera was the most abundant salivary species in HTN. Some fungal species directly correlated with blood pressure, including gut Exophiala xenobiotica and Exophiala mesophila. The markedly impaired ecological cocorrelation networks of oral and gut fungi in HTN suggested compromised association among fungal species. Most fungi were shared in the oral cavity and gut, and their correlations suggested the potential interplays between oral and gut fungi. In conclusion, the oral cavity and intestine have unique fungal ecological environments. The fungal enrichment and ecology in HTN, the correlations between oral and gut fungi, and the associations between oral and gut fungi and clinical parameters suggest an important role that the fungal microbiome may play in HTN. IMPORTANCE Our study fills the gap in human studies investigating the oral and gut fungal microbiota in association with blood pressure. It characterizes the diversity and composition of the oral and gut fungal microbiome in human subjects, elucidates the dysbiosis of fungal ecology in a hypertensive population, and establishes oral-gut fungal correlations and fungus-clinical parameter correlations. Targeting fungi in the oral cavity and/or gut may provide novel strategies for the prevention and treatment of hypertension.
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Affiliation(s)
- Bo-Yan Chen
- Laboratory of Oral Microbiota and Systemic Diseases, Shanghai Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- National Center for Stomatology, Shanghai Key Laboratory of Stomatology, Shanghai, China
- National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai, China
| | - Wen-Zhen Lin
- Laboratory of Oral Microbiota and Systemic Diseases, Shanghai Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- National Center for Stomatology, Shanghai Key Laboratory of Stomatology, Shanghai, China
- National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai, China
- Department of General Dentistry, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yu-Lin Li
- Laboratory of Oral Microbiota and Systemic Diseases, Shanghai Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- National Center for Stomatology, Shanghai Key Laboratory of Stomatology, Shanghai, China
- National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai, China
| | - Chao Bi
- Department of Stomatology, First Affiliated Hospital, Anhui Medical University, Hefei, China
| | - Lin-Juan Du
- Laboratory of Oral Microbiota and Systemic Diseases, Shanghai Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- National Center for Stomatology, Shanghai Key Laboratory of Stomatology, Shanghai, China
- National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai, China
| | - Yuan Liu
- Laboratory of Oral Microbiota and Systemic Diseases, Shanghai Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- National Center for Stomatology, Shanghai Key Laboratory of Stomatology, Shanghai, China
- National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai, China
| | - Lu-Jun Zhou
- Laboratory of Oral Microbiota and Systemic Diseases, Shanghai Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- National Center for Stomatology, Shanghai Key Laboratory of Stomatology, Shanghai, China
- National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai, China
- Department of General Dentistry, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ting Liu
- Laboratory of Oral Microbiota and Systemic Diseases, Shanghai Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- National Center for Stomatology, Shanghai Key Laboratory of Stomatology, Shanghai, China
- National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai, China
| | - Shuo Xu
- Laboratory of Oral Microbiota and Systemic Diseases, Shanghai Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- National Center for Stomatology, Shanghai Key Laboratory of Stomatology, Shanghai, China
- National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai, China
| | - Chao-Ji Shi
- National Center for Stomatology, Shanghai Key Laboratory of Stomatology, Shanghai, China
- National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai, China
- Department of Oral and Maxillofacial-Head and Neck Oncology, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hong Zhu
- Laboratory of Oral Microbiota and Systemic Diseases, Shanghai Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- National Center for Stomatology, Shanghai Key Laboratory of Stomatology, Shanghai, China
- National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai, China
| | - Yong-Li Wang
- Laboratory of Oral Microbiota and Systemic Diseases, Shanghai Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- National Center for Stomatology, Shanghai Key Laboratory of Stomatology, Shanghai, China
- National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai, China
| | - Jian-Yong Sun
- Laboratory of Oral Microbiota and Systemic Diseases, Shanghai Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- National Center for Stomatology, Shanghai Key Laboratory of Stomatology, Shanghai, China
- National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai, China
| | - Yan Liu
- Laboratory of Oral Microbiota and Systemic Diseases, Shanghai Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- National Center for Stomatology, Shanghai Key Laboratory of Stomatology, Shanghai, China
- National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai, China
| | - Wu-Chang Zhang
- Laboratory of Oral Microbiota and Systemic Diseases, Shanghai Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- National Center for Stomatology, Shanghai Key Laboratory of Stomatology, Shanghai, China
- National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai, China
| | - Zhiyuan Zhang
- National Center for Stomatology, Shanghai Key Laboratory of Stomatology, Shanghai, China
- National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai, China
- Department of Oral and Maxillofacial-Head and Neck Oncology, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hui-li Zhang
- Department of Cardiology, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ya-Qin Zhu
- National Center for Stomatology, Shanghai Key Laboratory of Stomatology, Shanghai, China
- National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai, China
- Department of General Dentistry, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Sheng-Zhong Duan
- Laboratory of Oral Microbiota and Systemic Diseases, Shanghai Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- National Center for Stomatology, Shanghai Key Laboratory of Stomatology, Shanghai, China
- National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai, China
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Gancz AS, Weyrich LS. Studying ancient human oral microbiomes could yield insights into the evolutionary history of noncommunicable diseases. F1000Res 2023; 12:109. [PMID: 37065506 PMCID: PMC10090864 DOI: 10.12688/f1000research.129036.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/03/2023] [Indexed: 01/31/2023] Open
Abstract
Noncommunicable diseases (NCDs) have played a critical role in shaping human evolution and societies. Despite the exceptional impact of NCDs economically and socially, little is known about the prevalence or impact of these diseases in the past as most do not leave distinguishing features on the human skeleton and are not directly associated with unique pathogens. The inability to identify NCDs in antiquity precludes researchers from investigating how changes in diet, lifestyle, and environments modulate NCD risks in specific populations and from linking evolutionary processes to modern health patterns and disparities. In this review, we highlight how recent advances in ancient DNA (aDNA) sequencing and analytical methodologies may now make it possible to reconstruct NCD-related oral microbiome traits in past populations, thereby providing the first proxies for ancient NCD risk. First, we review the direct and indirect associations between modern oral microbiomes and NCDs, specifically cardiovascular disease, diabetes mellitus, rheumatoid arthritis, and Alzheimer's disease. We then discuss how oral microbiome features associated with NCDs in modern populations may be used to identify previously unstudied sources of morbidity and mortality differences in ancient groups. Finally, we conclude with an outline of the challenges and limitations of employing this approach, as well as how they might be circumvented. While significant experimental work is needed to verify that ancient oral microbiome markers are indeed associated with quantifiable health and survivorship outcomes, this new approach is a promising path forward for evolutionary health research.
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Affiliation(s)
- Abigail S Gancz
- Department of Anthropology, Pennsylvania State University, State College, PA, 16802, USA
| | - Laura S Weyrich
- Department of Anthropology, Pennsylvania State University, State College, PA, 16802, USA
- School of Biological Sciences, University of Adelaide, Adelaide, South Australia, 5005, Australia
- Huck Institutes of the Life Sciences, Pennsylvania State University, State College, PA, 16802, USA
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Gancz AS, Weyrich LS. Studying ancient human oral microbiomes could yield insights into the evolutionary history of noncommunicable diseases. F1000Res 2023; 12:109. [PMID: 37065506 PMCID: PMC10090864 DOI: 10.12688/f1000research.129036.2] [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] [Accepted: 04/05/2023] [Indexed: 04/19/2023] Open
Abstract
Noncommunicable diseases (NCDs) have played a critical role in shaping human evolution and societies. Despite the exceptional impact of NCDs economically and socially, little is known about the prevalence or impact of these diseases in the past as most do not leave distinguishing features on the human skeleton and are not directly associated with unique pathogens. The inability to identify NCDs in antiquity precludes researchers from investigating how changes in diet, lifestyle, and environments modulate NCD risks in specific populations and from linking evolutionary processes to modern health patterns and disparities. In this review, we highlight how recent advances in ancient DNA (aDNA) sequencing and analytical methodologies may now make it possible to reconstruct NCD-related oral microbiome traits in past populations, thereby providing the first proxies for ancient NCD risk. First, we review the direct and indirect associations between modern oral microbiomes and NCDs, specifically cardiovascular disease, diabetes mellitus, rheumatoid arthritis, and Alzheimer's disease. We then discuss how oral microbiome features associated with NCDs in modern populations may be used to identify previously unstudied sources of morbidity and mortality differences in ancient groups. Finally, we conclude with an outline of the challenges and limitations of employing this approach, as well as how they might be circumvented. While significant experimental work is needed to verify that ancient oral microbiome markers are indeed associated with quantifiable health and survivorship outcomes, this new approach is a promising path forward for evolutionary health research.
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Affiliation(s)
- Abigail S Gancz
- Department of Anthropology, Pennsylvania State University, State College, PA, 16802, USA
| | - Laura S Weyrich
- Department of Anthropology, Pennsylvania State University, State College, PA, 16802, USA
- School of Biological Sciences, University of Adelaide, Adelaide, South Australia, 5005, Australia
- Huck Institutes of the Life Sciences, Pennsylvania State University, State College, PA, 16802, USA
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Kalyan M, Tousif AH, Sonali S, Vichitra C, Sunanda T, Praveenraj SS, Ray B, Gorantla VR, Rungratanawanich W, Mahalakshmi AM, Qoronfleh MW, Monaghan TM, Song BJ, Essa MM, Chidambaram SB. Role of Endogenous Lipopolysaccharides in Neurological Disorders. Cells 2022; 11:cells11244038. [PMID: 36552802 PMCID: PMC9777235 DOI: 10.3390/cells11244038] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Revised: 12/02/2022] [Accepted: 12/12/2022] [Indexed: 12/15/2022] Open
Abstract
Lipopolysaccharide (LPS) is a cell-wall immunostimulatory endotoxin component of Gram-negative bacteria. A growing body of evidence reveals that alterations in the bacterial composition of the intestinal microbiota (gut dysbiosis) disrupt host immune homeostasis and the intestinal barrier function. Microbial dysbiosis leads to a proinflammatory milieu and systemic endotoxemia, which contribute to the development of neurodegenerative diseases and metabolic disorders. Two important pathophysiological hallmarks of neurodegenerative diseases (NDDs) are oxidative/nitrative stress and inflammation, which can be initiated by elevated intestinal permeability, with increased abundance of pathobionts. These changes lead to excessive release of LPS and other bacterial products into blood, which in turn induce chronic systemic inflammation, which damages the blood-brain barrier (BBB). An impaired BBB allows the translocation of potentially harmful bacterial products, including LPS, and activated neutrophils/leucocytes into the brain, which results in neuroinflammation and apoptosis. Chronic neuroinflammation causes neuronal damage and synaptic loss, leading to memory impairment. LPS-induced inflammation causes inappropriate activation of microglia, astrocytes, and dendritic cells. Consequently, these alterations negatively affect mitochondrial function and lead to increases in oxidative/nitrative stress and neuronal senescence. These cellular changes in the brain give rise to specific clinical symptoms, such as impairment of locomotor function, muscle weakness, paralysis, learning deficits, and dementia. This review summarizes the contributing role of LPS in the development of neuroinflammation and neuronal cell death in various neurodegenerative diseases.
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Affiliation(s)
- Manjunath Kalyan
- Department of Pharmacology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India
- Centre for Experimental Pharmacology and Toxicology, Central Animal Facility, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India
| | - Ahmed Hediyal Tousif
- Department of Pharmacology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India
- Centre for Experimental Pharmacology and Toxicology, Central Animal Facility, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India
| | - Sharma Sonali
- Department of Pharmacology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India
- Centre for Experimental Pharmacology and Toxicology, Central Animal Facility, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India
| | - Chandrasekaran Vichitra
- Department of Pharmacology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India
- Centre for Experimental Pharmacology and Toxicology, Central Animal Facility, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India
| | - Tuladhar Sunanda
- Department of Pharmacology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India
- Centre for Experimental Pharmacology and Toxicology, Central Animal Facility, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India
| | - Sankar Simla Praveenraj
- Department of Pharmacology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India
| | - Bipul Ray
- Section of Molecular Pharmacology and Toxicology, Laboratory of Membrane Biochemistry and Biophysics, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Rockville, MD 20892, USA
| | - Vasavi Rakesh Gorantla
- Department of Anatomical sciences, School of Medicine, St. George’s University Grenada, West Indies FZ818, Grenada
| | - Wiramon Rungratanawanich
- Section of Molecular Pharmacology and Toxicology, Laboratory of Membrane Biochemistry and Biophysics, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Rockville, MD 20892, USA
| | - Arehally M. Mahalakshmi
- Department of Pharmacology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India
| | - M. Walid Qoronfleh
- Q3CG Research Institute (QRI), Research & Policy Division, 7227 Rachel Drive, Ypsilanti, MI 48917, USA
- 21 Health Street, Consulting Services, 1 Christian Fields, London SW16 3JY, UK
| | - Tanya M. Monaghan
- National Institute for Health Research Nottingham Biomedical Research Centre, University of Nottingham, Nottingham NG7 2UH, UK
- Nottingham Digestive Diseases Centre, School of Medicine, University of Nottingham, Nottingham NG7 2UH, UK
| | - Byoung-Joon Song
- Section of Molecular Pharmacology and Toxicology, Laboratory of Membrane Biochemistry and Biophysics, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Rockville, MD 20892, USA
- Correspondence: (B.-J.S.); (M.M.E.); (S.B.C.)
| | - Musthafa Mohamed Essa
- Department of Food Science and Nutrition, CAMS, Sultan Qaboos University, Muscat 123, Oman
- Aging and Dementia Research Group, Sultan Qaboos University, Muscat 123, Oman
- Correspondence: (B.-J.S.); (M.M.E.); (S.B.C.)
| | - Saravana Babu Chidambaram
- Department of Pharmacology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India
- Centre for Experimental Pharmacology and Toxicology, Central Animal Facility, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India
- Correspondence: (B.-J.S.); (M.M.E.); (S.B.C.)
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Yamawaki Y, So H, Oue K, Asano S, Furusho H, Miyauchi M, Tanimoto K, Kanematsu T. Imipramine prevents Porphyromonas gingivalis lipopolysaccharide-induced microglial neurotoxicity. Biochem Biophys Res Commun 2022; 634:92-99. [DOI: 10.1016/j.bbrc.2022.09.109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 09/28/2022] [Indexed: 11/27/2022]
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Li S, He M, Lei Y, Liu Y, Li X, Xiang X, Wu Q, Wang Q. Oral Microbiota and Tumor-A New Perspective of Tumor Pathogenesis. Microorganisms 2022; 10:2206. [PMID: 36363799 PMCID: PMC9692822 DOI: 10.3390/microorganisms10112206] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 10/18/2022] [Accepted: 10/31/2022] [Indexed: 09/11/2023] Open
Abstract
Microorganisms have long been known to play key roles in the initiation and development of tumors. The oral microbiota and tumorigenesis have been linked in epidemiological research relating to molecular pathology. Notably, some bacteria can impact distal tumors by their gastrointestinal or blood-borne transmission under pathological circumstances. Certain bacteria drive tumorigenesis and progression through direct or indirect immune system actions. This review systemically discusses the recent advances in the field of oral microecology and tumor, including the oncogenic role of oral microbial abnormalities and various potential carcinogenesis mechanisms (excessive inflammatory response, host immunosuppression, anti-apoptotic activity, and carcinogen secretion) to introduce future directions for effective tumor prevention.
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Affiliation(s)
- Simin Li
- Institute of Infection, Immunology and Tumor Microenvironment, Hubei Province Key Laboratory of Occupational Hazard Identification and Control, Medical College, Wuhan University of Science and Technology, Wuhan 430065, China
| | - Mingxin He
- Institute of Infection, Immunology and Tumor Microenvironment, Hubei Province Key Laboratory of Occupational Hazard Identification and Control, Medical College, Wuhan University of Science and Technology, Wuhan 430065, China
| | - Yumeng Lei
- Institute of Infection, Immunology and Tumor Microenvironment, Hubei Province Key Laboratory of Occupational Hazard Identification and Control, Medical College, Wuhan University of Science and Technology, Wuhan 430065, China
| | - Yang Liu
- Wuhan Asia General Hospital Affiliated to Wuhan University of Science and Technology, Wuhan 430065, China
| | - Xinquan Li
- Institute of Infection, Immunology and Tumor Microenvironment, Hubei Province Key Laboratory of Occupational Hazard Identification and Control, Medical College, Wuhan University of Science and Technology, Wuhan 430065, China
| | - Xiaochen Xiang
- Institute of Infection, Immunology and Tumor Microenvironment, Hubei Province Key Laboratory of Occupational Hazard Identification and Control, Medical College, Wuhan University of Science and Technology, Wuhan 430065, China
| | - Qingming Wu
- Institute of Infection, Immunology and Tumor Microenvironment, Hubei Province Key Laboratory of Occupational Hazard Identification and Control, Medical College, Wuhan University of Science and Technology, Wuhan 430065, China
| | - Qiang Wang
- Institute of Infection, Immunology and Tumor Microenvironment, Hubei Province Key Laboratory of Occupational Hazard Identification and Control, Medical College, Wuhan University of Science and Technology, Wuhan 430065, China
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Does the Gut Microbial Metabolome Really Matter? The Connection between GUT Metabolome and Neurological Disorders. Nutrients 2022; 14:nu14193967. [PMID: 36235622 PMCID: PMC9571089 DOI: 10.3390/nu14193967] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 09/20/2022] [Accepted: 09/21/2022] [Indexed: 11/30/2022] Open
Abstract
Herein we gathered updated knowledge regarding the alterations of gut microbiota (dysbiosis) and its correlation with human neurodegenerative and brain-related diseases, e.g., Alzheimer’s and Parkinson’s. This review underlines the importance of gut-derived metabolites and gut metabolic status as the main players in gut-brain crosstalk and their implications on the severity of neural conditions. Scientific evidence indicates that the administration of probiotic bacteria exerts beneficial and protective effects as reduced systemic inflammation, neuroinflammation, and inhibited neurodegeneration. The experimental results performed on animals, but also human clinical trials, show the importance of designing a novel microbiota-based probiotic dietary supplementation with the aim to prevent or ease the symptoms of Alzheimer’s and Parkinson’s diseases or other forms of dementia or neurodegeneration.
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Happy ageing by trusting our gut microbes. Biochem Biophys Res Commun 2022; 633:88-91. [DOI: 10.1016/j.bbrc.2022.09.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Accepted: 09/06/2022] [Indexed: 11/17/2022]
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Chen L, Xu X, Wu X, Cao H, Li X, Hou Z, Wang B, Liu J, Ji X, Zhang P, Li H. A comparison of the composition and functions of the oral and gut microbiotas in Alzheimer’s patients. Front Cell Infect Microbiol 2022; 12:942460. [PMID: 36093178 PMCID: PMC9448892 DOI: 10.3389/fcimb.2022.942460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 08/05/2022] [Indexed: 11/13/2022] Open
Abstract
Objective Alterations in the oral or gut microbiotas have been reported in patients with subjective and mild cognitive impairment or AD dementia. However, whether these microbiotas change with the severity of the AD spectrum (mild, moderate, and severe AD) remains unknown. Thus, we compared alterations in the composition and gene functions of the oral and gut microbiota between different phases of AD. Methods We recruited 172 individuals and classified these into three groups: healthy controls (n = 40), a mild AD group (n = 43) and a moderate AD group (n = 89). Subgingival plaques and fecal samples were collected from all individuals. Then, we conducted 16S ribosomal RNA. sequencing to analyze the microbiotas. Results In order of the severity of cognition impairment (from normal to mild and to moderate AD), the oral abundances of the phyla Firmicutes and Fusobacteria showed a gradual upwards trend, while the abundance of the Proteobacteria phylum gradually decreased. In contrast, the abundance of the Firmicutes and Bacteroidetes phyla in the gut decreased progressively, while that of the Proteobacteria, Verrucomicrobia and Actinobacteria phyla increased gradually. Key differences were identified in the microbiomes when compared between the mild AD and moderate AD groups when applying the linear discriminant analysis effect size (LEfSe) algorithm. LEfSe analysis revealed alterations that were similar to those described above; furthermore, different bacterial taxa were associated with MMSE scores and age. KEGG analysis showed that the functional pathways associated with the oral microbiota were mainly involved in membrane transport and carbohydrate metabolism, while the gene functions of the fecal microbiota related to metabolism of amino acids, energy, cofactors and vitamins; identified significant differences among the three groups. Venn diagram analysis revealed that the number of genera that were present in both the oral and gut microbiota increased progressively from NC to mild AD and then to moderate AD. Conclusions This study is the first to report a comparative analysis of the oral and fecal microbiota of patients with mild and moderate AD. The compositions and functions of the oral and gut microbiotas differed when compared between different stages of AD.
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Affiliation(s)
- Lili Chen
- The School of Nursing, Fujian Medical University, Fuzhou, China
- Shengli Clinical Medical College of Fujian Medical University, Fuzhou, China
- Nursing Department, Fujian Provincial Hospital, Fuzhou, China
| | - Xinhua Xu
- The School of Nursing, Fujian Medical University, Fuzhou, China
| | - Xiaoqi Wu
- College of Traditional Chinese Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Huizhen Cao
- The School of Nursing, Fujian Medical University, Fuzhou, China
- Nursing Department, Fujian Provincial Hospital South Branch, Fuzhou, China
| | - Xiuli Li
- The School of Nursing, Fujian Medical University, Fuzhou, China
| | - Zhaoyi Hou
- The School of Nursing, Fujian Medical University, Fuzhou, China
| | - Bixia Wang
- The School of Nursing, Fujian Medical University, Fuzhou, China
| | - Jinxiu Liu
- The School of Nursing, Fujian Medical University, Fuzhou, China
| | - Xinli Ji
- The School of Nursing, Fujian Medical University, Fuzhou, China
| | - Ping Zhang
- The School of Nursing, Fujian Medical University, Fuzhou, China
| | - Hong Li
- The School of Nursing, Fujian Medical University, Fuzhou, China
- Shengli Clinical Medical College of Fujian Medical University, Fuzhou, China
- Nursing Department, Fujian Provincial Hospital, Fuzhou, China
- *Correspondence: Hong Li,
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Jeon JH, Lourenco JM, Fagan MM, Welch CB, Sneed SE, Dubrof S, Duberstein KJ, Callaway TR, West FD, Park HJ. Changes in Oral Microbial Diversity in a Piglet Model of Traumatic Brain Injury. Brain Sci 2022; 12:brainsci12081111. [PMID: 36009173 PMCID: PMC9405691 DOI: 10.3390/brainsci12081111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 08/16/2022] [Accepted: 08/19/2022] [Indexed: 11/16/2022] Open
Abstract
Dynamic changes in the oral microbiome have gained attention due to their potential diagnostic role in neurological diseases such as Alzheimer's disease and Parkinson's disease. Traumatic brain injury (TBI) is a leading cause of death and disability in the United States, but no studies have examined the changes in oral microbiome during the acute stage of TBI using a clinically translational pig model. Crossbred piglets (4-5 weeks old, male) underwent either a controlled cortical impact (TBI, n = 6) or sham surgery (sham, n = 6). The oral microbiome parameters were quantified from the upper and lower gingiva, both buccal mucosa, and floor of the mouth pre-surgery and 1, 3, and 7 days post-surgery (PS) using the 16S rRNA gene. Faith's phylogenetic diversity was significantly lower in the TBI piglets at 7 days PS compared to those of sham, and beta diversity at 1, 3, and 7 days PS was significantly different between TBI and sham piglets. However, no significant changes in the taxonomic composition of the oral microbiome were observed following TBI compared to sham. Further studies are needed to investigate the potential diagnostic role of the oral microbiome during the chronic stage of TBI with a larger number of subjects.
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Affiliation(s)
- Julie Heejin Jeon
- Department of Nutritional Sciences, College of Family and Consumer Sciences, University of Georgia, Athens, GA 30602, USA
| | - Jeferson M. Lourenco
- Department of Animal and Dairy Science, College of Agricultural and Environmental Sciences, University of Georgia, Athens, GA 30602, USA
| | - Madison M. Fagan
- Department of Animal and Dairy Science, College of Agricultural and Environmental Sciences, University of Georgia, Athens, GA 30602, USA
- Regenerative Bioscience Center, University of Georgia, Athens, GA 30602, USA
| | - Christina B. Welch
- Department of Animal and Dairy Science, College of Agricultural and Environmental Sciences, University of Georgia, Athens, GA 30602, USA
| | - Sydney E. Sneed
- Department of Animal and Dairy Science, College of Agricultural and Environmental Sciences, University of Georgia, Athens, GA 30602, USA
- Regenerative Bioscience Center, University of Georgia, Athens, GA 30602, USA
| | - Stephanie Dubrof
- Department of Nutritional Sciences, College of Family and Consumer Sciences, University of Georgia, Athens, GA 30602, USA
| | - Kylee J. Duberstein
- Department of Animal and Dairy Science, College of Agricultural and Environmental Sciences, University of Georgia, Athens, GA 30602, USA
- Regenerative Bioscience Center, University of Georgia, Athens, GA 30602, USA
| | - Todd R. Callaway
- Department of Animal and Dairy Science, College of Agricultural and Environmental Sciences, University of Georgia, Athens, GA 30602, USA
| | - Franklin D. West
- Department of Animal and Dairy Science, College of Agricultural and Environmental Sciences, University of Georgia, Athens, GA 30602, USA
- Regenerative Bioscience Center, University of Georgia, Athens, GA 30602, USA
| | - Hea Jin Park
- Department of Nutritional Sciences, College of Family and Consumer Sciences, University of Georgia, Athens, GA 30602, USA
- Correspondence:
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The Antimicrobial Properties of Cannabis and Cannabis-Derived Compounds and Relevance to CB2-Targeted Neurodegenerative Therapeutics. Biomedicines 2022; 10:biomedicines10081959. [PMID: 36009504 PMCID: PMC9406052 DOI: 10.3390/biomedicines10081959] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 08/02/2022] [Accepted: 08/04/2022] [Indexed: 11/26/2022] Open
Abstract
Cannabinoid receptor 2 (CB2) is of interest as a much-needed target for the treatment or prevention of several neurogenerative diseases. However, CB2 agonists, particularly phytocannabinoids, have been ascribed antimicrobial properties and are associated with the induction of microbiome compositional fluxes. When developing novel CB2 therapeutics, CB2 engagement and antimicrobial functions should both be considered. This review summarizes those cannabinoids and cannabis-informed molecules and preparations (CIMPs) that show promise as microbicidal agents, with a particular focus on the most recent developments. CIMP–microbe interactions and anti-microbial mechanisms are discussed, while the major knowledge gaps and barriers to translation are presented. Further research into CIMPs may proffer novel direct or adjunctive strategies to augment the currently available antimicrobial armory. The clinical promise of CIMPs as antimicrobials, however, remains unrealized. Nevertheless, the microbicidal effects ascribed to several CB2 receptor-agonists should be considered when designing therapeutic approaches for neurocognitive and other disorders, particularly in cases where such regimens are to be long-term. To this end, the potential development of CB2 agonists lacking antimicrobial properties is also discussed.
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Giordano-Kelhoffer B, Lorca C, March Llanes J, Rábano A, del Ser T, Serra A, Gallart-Palau X. Oral Microbiota, Its Equilibrium and Implications in the Pathophysiology of Human Diseases: A Systematic Review. Biomedicines 2022; 10:biomedicines10081803. [PMID: 36009350 PMCID: PMC9405223 DOI: 10.3390/biomedicines10081803] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 07/19/2022] [Accepted: 07/23/2022] [Indexed: 02/06/2023] Open
Abstract
Imbalances of the oral microbiota and dysbiosis have traditionally been linked to the occurrence of teeth and oral diseases. However, recent findings indicate that this microbiota exerts relevant influence in systemic health. Dysbiosis of the oral microbiota is implicated in the apparition and progression of cardiovascular, neurodegenerative and other major human diseases. In fact, the oral microbiota are the second most diverse and largely populated microbiota of the human body and its relationships with systemic health, although widely explored, they still lack of proper integration. The purpose of this systematic review is thus to widely examine the implications of oral microbiota in oral, cardiovascular and neurodegenerative diseases to offer integrative and up-to-date interpretations. To achieve that aim, we identified a total of 121 studies curated in PUBMED from the time interval January 2003–April 2022, which after careful screening resulted in 79 studies included. The reviewed scientific literature provides plausible vias of implication of dysbiotic oral microbiota in systemic human diseases, and encourages further research to continue elucidating the highly relevant and still poorly understood implications of this niche microbiota in systemic health. PROSPERO Registration Number: CRD42022299692. This systematic review follows relevant PRISMA guidelines.
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Affiliation(s)
- Barbara Giordano-Kelhoffer
- Faculty of Dentistry, Universitat Internacional de Catalunya (UIC), 08017 Barcelona, Spain;
- Bioengineering Institute of Technology, Faculty of Health Sciences, Universitat Internacional de Catalunya (UIC), 08017 Barcelona, Spain
- Faculty of Health Sciences, Valencian International University, 46002 Valencia, Spain
- Biomedical Research Institute of Lleida Dr. Pifarré Foundation (IRB Lleida), Neuroscience Area, +Pec Proteomics Research Group (+PPRG), University Hospital Arnau de Vilanova (HUAV), 25198 Lleida, Spain;
| | - Cristina Lorca
- Biomedical Research Institute of Lleida Dr. Pifarré Foundation (IRB Lleida), Neuroscience Area, +Pec Proteomics Research Group (+PPRG), University Hospital Arnau de Vilanova (HUAV), 25198 Lleida, Spain;
- IMDEA—Food Research Institute, +Pec Proteomics, Campus of International Excellence UAM + CSIC, Old Cantoblanco Hospital, 8 Crta. Canto Blanco, 28049 Madrid, Spain
| | - Jaume March Llanes
- NeuroPGA Research Group—Psychology Department, University of Lleida (UdL), 25001 Lleida, Spain;
| | - Alberto Rábano
- Alzheimer’s Centre Reina Sofia—CIEN Foundation, 28031 Madrid, Spain; (A.R.); (T.d.S.)
| | - Teodoro del Ser
- Alzheimer’s Centre Reina Sofia—CIEN Foundation, 28031 Madrid, Spain; (A.R.); (T.d.S.)
| | - Aida Serra
- IMDEA—Food Research Institute, +Pec Proteomics, Campus of International Excellence UAM + CSIC, Old Cantoblanco Hospital, 8 Crta. Canto Blanco, 28049 Madrid, Spain
- Correspondence: (A.S.); (X.G.-P.); Tel.: +34-91-7278-100 (A.S.); +34-97-3702-224 (X.G.-P.)
| | - Xavier Gallart-Palau
- Faculty of Health Sciences, Valencian International University, 46002 Valencia, Spain
- Biomedical Research Institute of Lleida Dr. Pifarré Foundation (IRB Lleida), Neuroscience Area, +Pec Proteomics Research Group (+PPRG), University Hospital Arnau de Vilanova (HUAV), 25198 Lleida, Spain;
- Psychology Department, University of Lleida (UdL), 25001 Lleida, Spain
- Correspondence: (A.S.); (X.G.-P.); Tel.: +34-91-7278-100 (A.S.); +34-97-3702-224 (X.G.-P.)
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Mao S, Huang CP, Lan H, Lau HG, Chiang CP, Chen YW. Association of periodontitis and oral microbiomes with Alzheimer’s disease: A narrative systematic review. J Dent Sci 2022; 17:1762-1779. [PMID: 36299333 PMCID: PMC9588805 DOI: 10.1016/j.jds.2022.07.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 07/02/2022] [Indexed: 11/26/2022] Open
Abstract
Background/purpose Alzheimer’s disease (AD) is a neurodegenerative disorder and the most common form of dementia. The etiology for AD includes age, genetic susceptibility, neuropathology, and infection. Periodontitis is an infectious and inflammatory disease which mainly causes alveolar bone destruction and tooth loss. The evidence of a link between AD and periodontitis remains controversial. Thus far, studies reviewing the association between AD and periodontal disease have been insufficient from the viewpoint of the oral microbiome. The aim of this review was to focus on studies that have explored the relationship between the oral microbiome and AD development by using the next-generation sequencing technique. Materials and methods A comprehensive electronic search of MEDLINE via PubMed, EMBASE, Scopus, and Google Scholar was conducted. The keywords included dementia, Alzheimer’s disease, cognitive impairment, periodontitis, periodontal disease, and oral microbiome. Results This review included 26 articles based on the eligibility criteria. Epidemiologic researches and post-mortem studies showed that the presence of periodontitis is associated with cognitive decline, suggesting a possible role of periodontal pathogens in the pathogenesis of AD. The reported microbiome was inconsistent with those in gene sequencing studies. Nevertheless, Gram-negative species may be possible candidates. Conclusion This review suggests that periodontal infection is associated with AD. The contributing microbiome remains unconfirmed, possibly because of different microbiome sampling sites or methods. Additional large-scale studies with periodontal intervention and longitudinal follow-up are warranted to clarify the relationship between periodontal disease and AD.
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Li Z, Liu Y, Zhang L. Role of the microbiome in oral cancer occurrence, progression and therapy. Microb Pathog 2022; 169:105638. [PMID: 35718272 DOI: 10.1016/j.micpath.2022.105638] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Revised: 06/07/2022] [Accepted: 06/10/2022] [Indexed: 02/07/2023]
Abstract
The oral cavity, like other digestive or mucosal sites, contains a site-specific microbiome that plays a significant role in maintaining health and homeostasis. Strictly speaking, the gastrointestinal tract starts from the oral cavity, with special attention paid to the specific flora of the oral cavity. In healthy people, the microbiome of the oral microenvironment is governed by beneficial bacteria, that benefit the host by symbiosis. When a microecological imbalance occurs, changes in immune and metabolic signals affect the characteristics of cancer, as well as chronic inflammation, disruption of the epithelial barrier, changes in cell proliferation and cell apoptosis, genomic instability, angiogenesis, and epithelial barrier destruction and metabolic regulation. These pathophysiological changes could result in oral cancer. Rising evidence suggests that oral dysbacteriosis and particular microbes may play a positive role in the evolution, development, progression, and metastasis of oral cancer, for instance, oral squamous cell carcinoma (OSCC) through direct or indirect action.
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Affiliation(s)
- Zhengrui Li
- Department of Oral and Maxillofacial-Head and Neck Oncology, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200000, China.
| | - Yuan Liu
- Department of Oral and Maxillofacial-Head and Neck Oncology, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200000, China.
| | - Ling Zhang
- Department of Oral and Maxillofacial-Head and Neck Oncology, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200000, China.
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Liu K, Kong XJ. Altered Salivary Microbiota Following Bifidobacterium animalis Subsp. Lactis BL-11 Supplementation Are Associated with Anthropometric Growth and Social Behavior Severity in Individuals with Prader-Willi Syndrome. Probiotics Antimicrob Proteins 2022; 14:699-711. [PMID: 35474569 PMCID: PMC9246814 DOI: 10.1007/s12602-022-09938-0] [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] [Accepted: 04/04/2022] [Indexed: 12/04/2022]
Abstract
To evaluate the influence of oral probiotic Bifidobacterium animalis subsp. lactis (BL-11) supplementation on salivary microbiota composition and the association with growth parameters, and behavioral symptoms in individuals with Prader-Willi syndrome (PWS). In this post hoc analysis, we included a subset of 36 PWS patients with available saliva samples from our original randomized, double-blinded, placebo-controlled trial (Chinese Clinical Trial Registry, ChiCTR1900022646, April 20, 2019). Among the 36 subjects, 17 subjects were allocated to the probiotic group for daily use of the BL-11 probiotic and 19 subjects were allocated to the placebo group. Groupwise and longitudinal differences in salivary microbiota abundances, biodiversity metrics, and height were analyzed. Linear correlations were found between identified differentially abundant salivary microbiota and clinical parameters. Salivary microbiome α-diversity was found to be higher in the probiotic-treated group at week 12 relative to placebo controls (P < 0.05). Leptotrichia, Paracoccus, and Faecalibacterium were found to be more abundant in the probiotic-treated group (P < 0.05). Salivary microbiota abundance and predicted functional profiling abundance correlations were found to be associated with anti-inflammation, anti-obesity, toxin degradation, and anti-oxidative injury effects (Q < 0.1). Several oral taxa also displayed correlations with social behavior severity scores in the probiotic-treated group (Q < 0.1). The findings suggest novel salivary microbiota compositional changes in response to the oral supplementation of BL-11 probiotic in individuals with PWS. The observed differentially abundant taxa between groups post-treatment were highly correlated with interventional effects on growth and social behaviors, although further investigation is warranted. Clinical Trial Registration The original clinical trial was registered under the Chinese Clinical Trial Registry with registration number ChiCTR1900022646 (April 20, 2019).
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Affiliation(s)
- Kevin Liu
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, 149 13th Street, Charlestown, Boston, MA, 02129, USA
| | - Xue-Jun Kong
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, 149 13th Street, Charlestown, Boston, MA, 02129, USA. .,Department of Medicine and Psychiatry, Beth Israel Deaconess Medical Center, Boston, MA, 02215, USA.
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Liu M, Shi Y, Wu K, Xie W, Ser HL, Jiang Q, Wu L. From Mouth to Brain: Distinct Supragingival Plaque Microbiota Composition in Cerebral Palsy Children With Caries. Front Cell Infect Microbiol 2022; 12:814473. [PMID: 35480234 PMCID: PMC9037539 DOI: 10.3389/fcimb.2022.814473] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2021] [Accepted: 03/14/2022] [Indexed: 01/22/2023] Open
Abstract
Children with cerebral palsy (CP) present a higher prevalence and severity of caries. Although researchers have studied multiple risk factors for caries in CP, the role of microorganisms in caries remains one of the critical factors worth exploring. In order to explore the differences in the supragingival plaque microbiota (SPM), supragingival plaque samples were collected from 55 CP children and 23 non-CP children for 16S rRNA sequencing. Distinct SPM composition was found between CP children with severe caries (CPCS) and non-CP children with severe caries (NCPCS). Further subanalysis was also done to identify if there were any differences in SPM among CP children with different degrees of caries, namely, caries-free (CPCF), mild to moderate caries (CPCM), and severe caries (CPCS). After selecting the top 15 most abundant species in all groups, we found that CPCS was significantly enriched for Fusobacterium nucleatum, Prevotella intermedia, Campylobacter rectus, Porphyromonas endodontalis, Catonella morbi, Alloprevotella tannerae, Parvimonas micra, Streptobacillus moniliformis, and Porphyromonas canoris compared to NCPCS. By comparing CPCF, CPCM, and CPCS, we found that the core caries-associated microbiota in CP children included Prevotella, Alloprevotella, Actinomyces, Catonella, and Streptobacillus, while Capnocytophaga and Campylobacter were dental health-associated microbiota in CP children. Alpha diversity analysis showed no significant difference between NCPCS and CPCS, but the latter had a much simpler core correlation network than that of NCPCS. Among CP children, CPCM and CPCF displayed lower bacterial diversity and simpler correlation networks than those of CPCS. In summary, the study showed the specific SPM characteristics of CPCS compared to NCPCS and revealed the core SPM in CP children with different severities of caries (CPCF, CPCM, and CPCS) and their correlation network. Hopefully, the study would shed light on better caries prevention and therapies for CP children. Findings from the current study offer exciting insights that warrant larger cohort studies inclusive of saliva and feces samples to investigate the potential pathogenic role of oral microbiota through the oral–gut–brain axis in CP children with caries.
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Affiliation(s)
- Mingxiao Liu
- Department of Endodontics, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangdong Engineering Research Center of Oral Restoration and Reconstruction, Guangzhou Key Laboratory of Basic and Applied Research of Oral Regenerative Medicine, Guangzhou, China
- Guangzhou Medical University School and Hospital of Stomatology, Guangzhou, China
| | - Yuhan Shi
- Department of Endodontics, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangdong Engineering Research Center of Oral Restoration and Reconstruction, Guangzhou Key Laboratory of Basic and Applied Research of Oral Regenerative Medicine, Guangzhou, China
| | - Kaibin Wu
- Department of Endodontics, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangdong Engineering Research Center of Oral Restoration and Reconstruction, Guangzhou Key Laboratory of Basic and Applied Research of Oral Regenerative Medicine, Guangzhou, China
| | - Wei Xie
- Department of Endodontics, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangdong Engineering Research Center of Oral Restoration and Reconstruction, Guangzhou Key Laboratory of Basic and Applied Research of Oral Regenerative Medicine, Guangzhou, China
| | - Hooi-Leng Ser
- Novel Bacteria and Drug Discovery Research Group, Microbiome and Bioresource Research Strength, Jeffrey Cheah School of Medicine and Health Sciences, Monash University, Bandar Sunway, Malaysia
- Department of Biological Sciences, School of Medical and Life Sciences, Sunway University, Petaling Jaya, Malaysia
- *Correspondence: Lihong Wu, ; Qianzhou Jiang, ; Hooi-Leng Ser,
| | - Qianzhou Jiang
- Department of Endodontics, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangdong Engineering Research Center of Oral Restoration and Reconstruction, Guangzhou Key Laboratory of Basic and Applied Research of Oral Regenerative Medicine, Guangzhou, China
- Guangzhou Medical University School and Hospital of Stomatology, Guangzhou, China
- *Correspondence: Lihong Wu, ; Qianzhou Jiang, ; Hooi-Leng Ser,
| | - Lihong Wu
- Department of Endodontics, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangdong Engineering Research Center of Oral Restoration and Reconstruction, Guangzhou Key Laboratory of Basic and Applied Research of Oral Regenerative Medicine, Guangzhou, China
- Guangzhou Medical University School and Hospital of Stomatology, Guangzhou, China
- *Correspondence: Lihong Wu, ; Qianzhou Jiang, ; Hooi-Leng Ser,
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Sumich A, Heym N, Lenzoni S, Hunter K. Gut microbiome-brain axis and inflammation in temperament, personality and psychopathology. Curr Opin Behav Sci 2022. [DOI: 10.1016/j.cobeha.2022.101101] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Leaky Gum: The Revisited Origin of Systemic Diseases. Cells 2022; 11:cells11071079. [PMID: 35406643 PMCID: PMC8997512 DOI: 10.3390/cells11071079] [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: 02/17/2022] [Revised: 03/21/2022] [Accepted: 03/22/2022] [Indexed: 12/10/2022] Open
Abstract
The oral cavity is the gateway for microorganisms into your body where they disseminate not only to the directly connected respiratory and digestive tracts but also to the many remote organs. Oral microbiota, travelling to the end of the intestine and circulating in our bodies through blood vessels, not only affect a gut microbiome profile but also lead to many systemic diseases. By gathering information accumulated from the era of focal infection theory to the age of revolution in microbiome research, we propose a pivotal role of “leaky gum”, as an analogy of “leaky gut”, to underscore the importance of the oral cavity in systemic health. The oral cavity has unique structures, the gingival sulcus (GS) and the junctional epithelium (JE) below the GS, which are rarely found anywhere else in our body. The JE is attached to the tooth enamel and cementum by hemidesmosome (HD), which is structurally weaker than desmosome and is, thus, vulnerable to microbial infiltration. In the GS, microbial biofilms can build up for life, unlike the biofilms on the skin and intestinal mucosa that fall off by the natural process. Thus, we emphasize that the GS and the JE are the weakest leaky point for microbes to invade the human body, making the leaky gum just as important as, or even more important than, the leaky gut.
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Roles of oral microbiota and oral-gut microbial transmission in hypertension. J Adv Res 2022; 43:147-161. [PMID: 36585105 PMCID: PMC9811375 DOI: 10.1016/j.jare.2022.03.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 03/07/2022] [Accepted: 03/08/2022] [Indexed: 01/07/2023] Open
Abstract
INTRODUCTION Considerable evidence has linked periodontitis (PD) to hypertension (HTN), but the nature behind this connection is unclear. Dysbiosis of oral microbiota leading to PD is known to aggravate different systematic diseases, but the alteration of oral microbiota in HTN and their impacts on blood pressure (BP) remains to be discovered. OBJECTIVES To characterize the alterations of oral and gut microbiota and their roles in HTN. METHODS We performed a cross-sectional (95 HTN participants and 39 controls) and a 6-month follow-up study (52 HTN participants and 26 controls) to analyze the roles of oral and gut microbiota in HTN. Saliva, subgingival plaques, and feces were collected for 16S rRNA gene sequencing or metagenomic analysis. C57BL/6J mice were pretreated with antibiotics to deplete gut microbiota, and then transplanted with human saliva by gavage to test the impacts of abnormal oral-gut microbial transmission on HTN. RESULTS BP in participants with PD was higher than no PD in both cross-sectional and follow-up cohort. Relative abundances of 14 salivary genera, 15 subgingival genera and 10 gut genera significantly altered in HTN and those of 7 salivary genera, 12 subgingival genera and 6 gut genera significantly correlated with BP. Sixteen species under 5 genera were identified as oral-gut transmitters, illustrating the presence of oral-gut microbial transmission in HTN. Veillonella was a frequent oral-gut transmitter stably enriched in HTN participants of both cross-sectional and follow-up cohorts. Saliva from HTN participants increased BP in hypertensive mice. Human saliva-derived Veillonella successfully colonized in mouse gut, more abundantly under HTN condition. CONCLUSIONS PD and oral microbiota are strongly associated with HTN, likely through oral-gut transmission of microbes. Ectopic colonization of saliva-derived Veillonella in the gut may aggravate HTN. Therefore, precise manipulations of oral microbiota and/or oral-gut microbial transmission may be useful strategies for better prevention and treatment of HTN.
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Pal G, Ramirez V, Engen PA, Naqib A, Forsyth CB, Green SJ, Mahdavinia M, Batra PS, Tajudeen BA, Keshavarzian A. Deep nasal sinus cavity microbiota dysbiosis in Parkinson's disease. NPJ Parkinsons Dis 2021; 7:111. [PMID: 34880258 PMCID: PMC8655044 DOI: 10.1038/s41531-021-00254-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Accepted: 11/03/2021] [Indexed: 12/12/2022] Open
Abstract
Olfactory dysfunction is a pre-motor symptom of Parkinson’s disease (PD) that appears years prior to diagnosis and can affect quality of life in PD. Changes in microbiota community in deep nasal cavity near the olfactory bulb may trigger the olfactory bulb-mediated neuroinflammatory cascade and eventual dopamine loss in PD. To determine if the deep nasal cavity microbiota of PD is significantly altered in comparison to healthy controls, we characterized the microbiota of the deep nasal cavity using 16S rRNA gene amplicon sequencing in PD subjects and compared it to that of spousal and non-spousal healthy controls. Correlations between microbial taxa and PD symptom severity were also explored. Olfactory microbial communities of PD individuals were more similar to those of their spousal controls than to non-household controls. In direct comparison of PD and spousal controls and of PD and non-spousal controls, significantly differently abundant taxa were identified, and this included increased relative abundance of putative opportunistic-pathobiont species such as Moraxella catarrhalis. M. catarrhalis was also significantly correlated with more severe motor scores in PD subjects. This proof-of-concept study provides evidence that potential pathobionts are detected in the olfactory bulb and that a subset of changes in the PD microbiota community could be a consequence of unique environmental factors associated with PD living. We hypothesize that an altered deep nasal microbiota, characterized by a putative pro-inflammatory microbial community, could trigger neuroinflammation in PD.
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Affiliation(s)
- Gian Pal
- Department of Neurology, Rush University Medical Center, Chicago, IL, USA
| | - Vivian Ramirez
- Rush Medical College, Rush Center for Integrated Microbiome and Chronobiology Research, Rush University Medical Center, Chicago, IL, USA
| | - Phillip A Engen
- Rush Medical College, Rush Center for Integrated Microbiome and Chronobiology Research, Rush University Medical Center, Chicago, IL, USA
| | - Ankur Naqib
- Rush Medical College, Rush Center for Integrated Microbiome and Chronobiology Research, Rush University Medical Center, Chicago, IL, USA
| | - Christopher B Forsyth
- Rush Medical College, Rush Center for Integrated Microbiome and Chronobiology Research, Rush University Medical Center, Chicago, IL, USA
| | - Stefan J Green
- Genomics and Microbiome Core Facility, Rush University Medical Center, Chicago, IL, USA.,Department of Internal Medicine, Division of Infectious Diseases, Rush University Medical Center, Chicago, IL, USA
| | - Mahboobeh Mahdavinia
- Department of Internal Medicine, Allergy/Immunology Division, Rush University Medical Center, Chicago, IL, USA
| | - Pete S Batra
- Department of Otorhinolaryngology-Head and Neck Surgery, Rush University Medical Center, Chicago, IL, USA
| | - Bobby A Tajudeen
- Department of Otorhinolaryngology-Head and Neck Surgery, Rush University Medical Center, Chicago, IL, USA
| | - Ali Keshavarzian
- Rush Medical College, Rush Center for Integrated Microbiome and Chronobiology Research, Rush University Medical Center, Chicago, IL, USA. .,Department of Medicine & Physiology, Rush University Medical Center, Chicago, IL, USA. .,Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, Netherlands.
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Wen Y, Feng L, Wang H, Zhou H, Li Q, Zhang W, Wang M, Li Y, Luan X, Jiang Z, Chen L, Zhou J. Association Between Oral Microbiota and Human Brain Glioma Grade: A Case-Control Study. Front Microbiol 2021; 12:746568. [PMID: 34733261 PMCID: PMC8558631 DOI: 10.3389/fmicb.2021.746568] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Accepted: 09/24/2021] [Indexed: 01/04/2023] Open
Abstract
Gliomas are the most prevalent form of primary malignant brain tumor, which currently have no effective treatments. Evidence from human studies has indicated that oral microbiota is closely related to cancers; however, whether oral microbiota plays a role in glioma malignancy remains unclear. The present study aimed to investigate the association between oral microbiota and grade of glioma and examine the relationship between malignancy-related oral microbial features and the isocitrate dehydrogenase 1 (IDH1) mutation in glioma. High-grade glioma (HGG; n=23) patients, low-grade glioma (LGG; n=12) patients, and healthy control (HCs; n=24) participants were recruited for this case-control study. Saliva samples were collected and analyzed for 16S ribosomal RNA (rRNA) sequencing. We found that the shift in oral microbiota β-diversity was associated with high-grade glioma (p=0.01). The phylum Patescibacteria was inversely associated with glioma grade (LGG and HC: p=0.035; HGG and HC: p<0.01). The genera Capnocytophaga (LGG and HC: p=0.043; HGG and HC: p<0.01) and Leptotrichia (LGG and HC: p=0.044; HGG and HC: p<0.01) were inversely associated with glioma grades. The genera Bergeyella and Capnocytophaga were significantly more positively correlated with the IDH1 mutation in gliomas when compared with the IDH1-wild-type group. We further identified five oral microbial features (Capnocytophaga Porphyromonas, Haemophilus, Leptotrichia, and TM7x) that accurately discriminated HGG from LGG (area under the curve [AUC]: 0.63, 95% confidence interval [CI]: 0.44-0.83) and HCs (AUC: 0.79, 95% CI: 0.68-0.92). The functional prediction analysis of oral bacterial communities showed that genes involved in cell adhesion molecules (p<0.001), extracellular matrix molecule-receptor interaction (p<0.001), focal adhesion (p<0.001), and regulation of actin cytoskeleton (p<0.001) were associated with glioma grades, and some microbial gene functions involving lipid metabolism and the adenosine 5'-monophosphate-activated protein kinase signaling pathway were significantly more enriched in IDH1 mutant gliomas than compared with the IDH1-wild-type gliomas. In conclusion, our work revealed oral microbiota features and gene functions that were associated with glioma malignancy and the IDH1 mutation in glioma.
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Affiliation(s)
- Yuqi Wen
- Department of Neurosurgery, The Affiliated Hospital of Southwest Medical University, Luzhou, China.,Sichuan Clinical Medical Research Center for Neurosurgery, Luzhou, China
| | - Le Feng
- Department of Prosthodontics, The Affiliated Stomatology Hospital of Southwest Medical University, Luzhou, China
| | - Haorun Wang
- Department of Neurosurgery, The Affiliated Hospital of Southwest Medical University, Luzhou, China.,Sichuan Clinical Medical Research Center for Neurosurgery, Luzhou, China
| | - Hu Zhou
- Department of Neurosurgery, The Affiliated Hospital of Southwest Medical University, Luzhou, China.,Sichuan Clinical Medical Research Center for Neurosurgery, Luzhou, China
| | - Qianqian Li
- Department of Neurosurgery, The Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Wenyan Zhang
- Department of Neurosurgery, The Affiliated Hospital of Southwest Medical University, Luzhou, China.,Sichuan Clinical Medical Research Center for Neurosurgery, Luzhou, China
| | - Ming Wang
- Department of Neurosurgery, The Affiliated Hospital of Southwest Medical University, Luzhou, China.,Sichuan Clinical Medical Research Center for Neurosurgery, Luzhou, China
| | - Yeming Li
- Department of Neurosurgery, The Affiliated Hospital of Southwest Medical University, Luzhou, China.,Sichuan Clinical Medical Research Center for Neurosurgery, Luzhou, China
| | - Xingzhao Luan
- Department of Neurosurgery, The Affiliated Hospital of Southwest Medical University, Luzhou, China.,Sichuan Clinical Medical Research Center for Neurosurgery, Luzhou, China
| | - Zengliang Jiang
- School of Life Sciences, Westlake University, Hangzhou, China.,Key Laboratory of Growth Regulation and Translational Research of Zhejiang Province, School of Life Sciences, Westlake University, Hangzhou, China
| | - Ligang Chen
- Department of Neurosurgery, The Affiliated Hospital of Southwest Medical University, Luzhou, China.,Sichuan Clinical Medical Research Center for Neurosurgery, Luzhou, China.,Neurological Diseases and Brain Function Laboratory, The Affiliated Hospital of Southwest Medical University, Luzhou, China.,Academician (Expert) Workstation of Sichuan Province, The Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Jie Zhou
- Department of Neurosurgery, The Affiliated Hospital of Southwest Medical University, Luzhou, China.,Sichuan Clinical Medical Research Center for Neurosurgery, Luzhou, China.,Neurological Diseases and Brain Function Laboratory, The Affiliated Hospital of Southwest Medical University, Luzhou, China.,Academician (Expert) Workstation of Sichuan Province, The Affiliated Hospital of Southwest Medical University, Luzhou, China
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Scassellati C, Marizzoni M, Cattane N, Lopizzo N, Mombelli E, Riva MA, Cattaneo A. The Complex Molecular Picture of Gut and Oral Microbiota-Brain-Depression System: What We Know and What We Need to Know. Front Psychiatry 2021; 12:722335. [PMID: 34819883 PMCID: PMC8607517 DOI: 10.3389/fpsyt.2021.722335] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 09/30/2021] [Indexed: 12/12/2022] Open
Abstract
Major depressive disorder (MDD) is a complex mental disorder where the neurochemical, neuroendocrine, immune, and metabolic systems are impaired. The microbiota-gut-brain axis is a bidirectional network where the central and enteric nervous systems are linked through the same endocrine, immune, neural, and metabolic routes dysregulated in MDD. Thus, gut-brain axis abnormalities in MDD patients may, at least in part, account for the symptomatic features associated with MDD. Recent investigations have suggested that the oral microbiome also plays a key role in this complex molecular picture of relationships. As on one hand there is a lot of what we know and on the other hand little of what we still need to know, we structured this review focusing, in the first place, on putting all pieces of this complex puzzle together, underlying the endocrine, immune, oxidative stress, neural, microbial neurotransmitters, and metabolites molecular interactions and systems lying at the base of gut microbiota (GM)-brain-depression interphase. Then, we focused on promising but still under-explored areas of research strictly linked to the GM and potentially involved in MDD development: (i) the interconnection of GM with oral microbiome that can influence the neuroinflammation-related processes and (ii) gut phageome (bacteria-infecting viruses). As conclusions and future directions, we discussed potentiality but also pitfalls, roadblocks, and the gaps to be bridged in this exciting field of research. By the development of a broader knowledge of the biology associated with MDD, with the inclusion of the gut/oral microbiome, we can accelerate the growth toward a better global health based on precision medicine.
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Affiliation(s)
- Catia Scassellati
- Biological Psychiatry Unit, Istituto di Recupero e Cura a Carattere Scientifico (IRCCS) Istituto Centro San Giovanni di Dio Fatebenefratelli, Brescia, Italy
| | - Moira Marizzoni
- Biological Psychiatry Unit, Istituto di Recupero e Cura a Carattere Scientifico (IRCCS) Istituto Centro San Giovanni di Dio Fatebenefratelli, Brescia, Italy.,Laboratory of Alzheimer's Neuroimaging and Epidemiology, Istituto di Recupero e Cura a Carattere Scientifico (IRCCS) Istituto Centro San Giovanni di Dio Fatebenefratelli, Brescia, Italy
| | - Nadia Cattane
- Biological Psychiatry Unit, Istituto di Recupero e Cura a Carattere Scientifico (IRCCS) Istituto Centro San Giovanni di Dio Fatebenefratelli, Brescia, Italy
| | - Nicola Lopizzo
- Biological Psychiatry Unit, Istituto di Recupero e Cura a Carattere Scientifico (IRCCS) Istituto Centro San Giovanni di Dio Fatebenefratelli, Brescia, Italy.,Department of Pharmacological and Biomolecular Sciences, University of Milan, Milan, Italy
| | - Elisa Mombelli
- Biological Psychiatry Unit, Istituto di Recupero e Cura a Carattere Scientifico (IRCCS) Istituto Centro San Giovanni di Dio Fatebenefratelli, Brescia, Italy
| | - Marco Andrea Riva
- Biological Psychiatry Unit, Istituto di Recupero e Cura a Carattere Scientifico (IRCCS) Istituto Centro San Giovanni di Dio Fatebenefratelli, Brescia, Italy.,Department of Pharmacological and Biomolecular Sciences, University of Milan, Milan, Italy
| | - Annamaria Cattaneo
- Biological Psychiatry Unit, Istituto di Recupero e Cura a Carattere Scientifico (IRCCS) Istituto Centro San Giovanni di Dio Fatebenefratelli, Brescia, Italy.,Department of Pharmacological and Biomolecular Sciences, University of Milan, Milan, Italy
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