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Rujeedawa T, Carrillo Félez E, Clare ICH, Fortea J, Strydom A, Rebillat AS, Coppus A, Levin J, Zaman SH. The Clinical and Neuropathological Features of Sporadic (Late-Onset) and Genetic Forms of Alzheimer's Disease. J Clin Med 2021; 10:4582. [PMID: 34640600 PMCID: PMC8509365 DOI: 10.3390/jcm10194582] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 09/27/2021] [Accepted: 09/28/2021] [Indexed: 12/17/2022] Open
Abstract
The purpose of this review is to compare and highlight the clinical and pathological aspects of genetic versus acquired Alzheimer's disease: Down syndrome-associated Alzheimer's disease in (DSAD) and Autosomal Dominant Alzheimer's disease (ADAD) are compared with the late-onset form of the disease (LOAD). DSAD and ADAD present in a younger population and are more likely to manifest with non-amnestic (such as dysexecutive function features) in the prodromal phase or neurological features (such as seizures and paralysis) especially in ADAD. The very large variety of mutations associated with ADAD explains the wider range of phenotypes. In the LOAD, age-associated comorbidities explain many of the phenotypic differences.
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Affiliation(s)
- Tanzil Rujeedawa
- Cambridge Intellectual & Developmental Disabilities Research Group, Department of Psychiatry, University of Cambridge, Cambridge CB2 8PQ, UK; (T.R.); (E.C.F.); (I.C.H.C.)
| | - Eva Carrillo Félez
- Cambridge Intellectual & Developmental Disabilities Research Group, Department of Psychiatry, University of Cambridge, Cambridge CB2 8PQ, UK; (T.R.); (E.C.F.); (I.C.H.C.)
| | - Isabel C. H. Clare
- Cambridge Intellectual & Developmental Disabilities Research Group, Department of Psychiatry, University of Cambridge, Cambridge CB2 8PQ, UK; (T.R.); (E.C.F.); (I.C.H.C.)
- Cambridgeshire and Peterborough Foundation NHS Trust, Fulbourn CB21 5EF, UK
| | - Juan Fortea
- Sant Pau Memory Unit, Department of Neurology, Hospital de la Santa Creu i Sant Pau, Biomedical Research Institute Sant Pau, Universitat Autònoma de Barcelona, 08193 Barcelona, Spain;
- Center of Biomedical Investigation Network for Neurodegenerative Diseases (CIBERNED), 28031 Madrid, Spain
- Barcelona Down Medical Center, Fundació Catalana Síndrome de Down, 08029 Barcelona, Spain
| | - Andre Strydom
- Department of Forensic and Neurodevelopmental Sciences, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London SE5 8AF, UK;
- South London and the Maudsley NHS Foundation Trust, The LonDowns Consortium, London SE5 8AZ, UK
| | | | - Antonia Coppus
- Department for Primary and Community Care, Department of Primary and Community Care (149 ELG), Radboud University Nijmegen Medical Center, P.O. Box 9101, 6525 GA Nijmegen, The Netherlands;
| | - Johannes Levin
- Department of Neurology, Ludwig-Maximilians-Universität München, 80539 Munich, Germany;
- German Center for Neurodegenerative Diseases, Feodor-Lynen-Strasse 17, 81377 Munich, Germany
- Munich Cluster for Systems Neurology (SyNergy), Feodor-Lynen-Strasse 17, 81377 Munich, Germany
| | - Shahid H. Zaman
- Cambridge Intellectual & Developmental Disabilities Research Group, Department of Psychiatry, University of Cambridge, Cambridge CB2 8PQ, UK; (T.R.); (E.C.F.); (I.C.H.C.)
- Cambridgeshire and Peterborough Foundation NHS Trust, Fulbourn CB21 5EF, UK
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Sakanaka A, Takeuchi H, Kuboniwa M, Amano A. Dual lifestyle of Porphyromonas gingivalis in biofilm and gingival cells. Microb Pathog 2015; 94:42-7. [PMID: 26456558 DOI: 10.1016/j.micpath.2015.10.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2015] [Revised: 10/01/2015] [Accepted: 10/03/2015] [Indexed: 01/01/2023]
Abstract
Porphyromonas gingivalis is deeply involved in the pathogenesis of marginal periodontitis, and recent findings have consolidated its role as an important and unique pathogen. This bacterium has a unique dual lifestyle in periodontal sites including subgingival dental plaque (biofilm) and gingival cells, as it has been clearly shown that P. gingivalis is able to exert virulence using completely different tactics in each environment. Inter-bacterial cross-feeding enhances the virulence of periodontal microflora, and such metabolic and adhesive interplay creates a supportive environment for P. gingivalis and other species. Human oral epithelial cells harbor a large intracellular bacterial load, resembling the polymicrobial nature of periodontal biofilm. P. gingivalis can enter gingival epithelial cells and pass through the epithelial barrier into deeper tissues. Subsequently, from its intracellular position, the pathogen exploits cellular recycling pathways to exit invaded cells, by which it is able to control its population in infected tissues, allowing for persistent infection in gingival tissues. Here, we outline the dual lifestyle of P. gingivalis in subgingival areas and its effects on the pathogenesis of periodontitis.
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Affiliation(s)
- Akito Sakanaka
- Department of Preventive Dentistry, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Hiroki Takeuchi
- Department of Preventive Dentistry, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Masae Kuboniwa
- Department of Preventive Dentistry, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Atsuo Amano
- Department of Preventive Dentistry, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan.
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Marks L, Fernandez C, Kaschke I, Perlman S. Oral cleanliness and gingival health among Special Olympics athletes in Europe and Eurasia. Med Oral Patol Oral Cir Bucal 2015; 20:e591-7. [PMID: 26241452 PMCID: PMC4598929 DOI: 10.4317/medoral.20396] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Accepted: 04/29/2015] [Indexed: 12/02/2022] Open
Abstract
Background Special Olympics athletes, as well as the general population of people with intellectual disabilities, are expected to have poorer gingival health. The aim of the study is to explore the prevalence of gingival signs of inflammation and its relationship to oral cleanliness and age among Special Olympics athletes from Europe and Eurasia. Material and Methods A retrospective longitudinal study was performed with data collected through standardized oral from 15.941 athletes from annual Special Olympics events held in 49 countries, from Europe and Eurasia between 2007 and 2012. The data was analysed descriptively, with One-Way ANOVA test and Chi-Square test. Results The level of significance was predetermined at a p value < 0.05. A total of 7,754 athletes presented with gingival signs (48.64%). There were no significant differences (p= 0,095) in mean gingival signs between age groups, however the association between mouth cleaning and age, was statistically significant. Conclusions The data suggests that there is a high prevalence of gingival signs among individuals with special needs; over 50% in more than 20 countries. Therefore, there is a serious need for education and preventive programs for the patients, their parents and caregivers. Key words:Gingivitis, prevalence, hygiene, disability, Special Olympics.
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Affiliation(s)
- Luc Marks
- Dental School, Centre of Special care in dentistry, Ghent University, Pintelaan 185, Ghent 9000, Belgium,
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The effect of conventional mechanical periodontal treatment on red complex microorganisms and clinical parameters in Down syndrome periodontitis patients: a pilot study. Eur J Clin Microbiol Infect Dis 2014; 34:601-8. [DOI: 10.1007/s10096-014-2268-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Accepted: 10/20/2014] [Indexed: 01/18/2023]
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Irshad M, van der Reijden WA, Crielaard W, Laine ML. In vitro invasion and survival of Porphyromonas gingivalis in gingival fibroblasts; role of the capsule. Arch Immunol Ther Exp (Warsz) 2012; 60:469-76. [PMID: 22949096 DOI: 10.1007/s00005-012-0196-8] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2012] [Accepted: 07/23/2012] [Indexed: 11/28/2022]
Abstract
Porphyromonas gingivalis is a Gram-negative, anaerobic bacterium involved in periodontitis and peri-implantitis that can invade and survive inside host cells in vitro. P. gingivalis can invade human gingival fibroblasts (GF), but no data are available about the role of P. gingivalis' capsule in GF invasion. In the current study, we aimed to determine the ability of three strains of P. gingivalis (encapsulated wild type W83, non-encapsulated HG91 and the non-encapsulated insertional isogenic knockout mutant of W83, ΔEpsC) to invade GF and the ability of internalized P. gingivalis to survive in vitro antibiotic treatment. The ability of P. gingivalis strains to invade GF was tested using an antibiotic protection assay at multiplicity of infection (MOI) 100 and 1000. The survival of internalized P. gingivalis cells was further analyzed by subsequent in vitro treatment with either metronidazole or amoxicillin alone or a combination of metronidazole and amoxicillin and anaerobic culture viability counts. All strains of P. gingivalis used in this study were able to invade GFs. The non-encapsulated mutant of W83 (ΔEpsC mutant) was significantly more invasive than the wild type W83 at MOI 100 (p value 0.025) and MOI 1000 (p value 0.038). Furthermore, internalized P. gingivalis was able to resist in vitro antibiotic treatment. As demonstrated by the differences in invasion efficiencies of P. gingivalis strain W83 and its isogenic mutant ΔEpsC, the capsule of P. gingivalis makes it less efficient in invading gingival fibroblasts. Moreover, internalized P. gingivalis can survive antibiotic treatment in vitro.
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Affiliation(s)
- Muhammad Irshad
- Section of Preventive Dentistry, Department of Conservative and Preventive Dentistry, Academic Centre for Dentistry Amsterdam, ACTA, University of Amsterdam and Vrije University Amsterdam, Amsterdam, The Netherlands
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Jetley NK, Al-Assiri AH, Al-Helal AS, Al-Bin Ali AM. Down's syndrome as a factor in the diagnosis, management, and outcome in patients of Morgagni hernia. J Pediatr Surg 2011; 46:636-639. [PMID: 21496530 DOI: 10.1016/j.jpedsurg.2010.10.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2010] [Revised: 09/04/2010] [Accepted: 10/01/2010] [Indexed: 10/18/2022]
Abstract
PURPOSE The purpose was to study the impact of Down's syndrome (DS) in the diagnosis, management, and outcomes of patients with Morgagni hernia (MH). METHODS Twenty-two (22) patients with MH treated at a tertiary center were retrospectively studied for history, findings, associated anomalies, referral diagnoses, hospital admissions, radiological procedures for diagnosis, age at which operated on, operative procedure, complications, and recurrences. Eleven did not have DS (group 1); 11 others had associated DS (group 2). The ages at operation were compared in the 2 groups using the Mann-Whitney test. More than 3 hospital admissions for symptoms and signs relevant to MH before a diagnosis of MH were considered a "delayed diagnosis." RESULTS Twenty-two patients (7 females, 15 males) aged 3 months to 10 years were seen. They presented with respiratory distress (n = 16), with vomiting (n = 5), with intestinal obstruction (n = 1), by serendipity (n = 2), and with recurrence from another hospital (n = 1). The mean age of group 1 was 14.5 months, and that of group 2 was 29.18 months; the difference was not significant (P = .621). Nine patients of group 2 were "delayed diagnosis" compared with 2 in group 1. Both delays from group 1 had severe associated anomalies. All patients underwent operative correction (17 open and 5 laparoscopic repairs). Two had recurrences, one operated on by the open method by us and another laparoscopically by the Lima technique at another center. Both had DS. Both were reoperated on by the open method. CONCLUSIONS The diagnosis of MH may be strikingly delayed when associated with DS or other severe congenital anomalies. Morgagni hernia should be strongly considered in patients with DS admitted repeatedly for chest infections. Chest x-rays in 2 planes may avoid misdiagnosis of MH. Both open and laparoscopic methods have proven satisfactory as operative treatment of MH. Recurrences were seen in patients with DS, which may be corrected by laparotomy or laparoscopically. We feel that resecting the sac and approximating the posterior lip of the defect to the anterior abdominal wall, whether in open or laparoscopic methods, may give stronger repairs, which may avoid recurrence.
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Affiliation(s)
| | - Ali Hassan Al-Assiri
- Department of Pediatric Surgery, King Faisal Specialist Hospital and Research Center, Riyadh, 11211, Kingdom of Saudi Arabia
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Khocht A, Janal M, Turner B. Periodontal health in Down syndrome: Contributions of mental disability, personal, and professional dental care. SPECIAL CARE IN DENTISTRY 2010; 30:118-23. [DOI: 10.1111/j.1754-4505.2010.00134.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Shi H, Ma J, Zhao N, Chen Y, Liao Y. Periodontal regeneration in experimentally-induced alveolar bone dehiscence by an improved porous biphasic calcium phosphate ceramic in beagle dogs. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2008; 19:3515-3524. [PMID: 18622766 DOI: 10.1007/s10856-008-3524-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2008] [Accepted: 06/20/2008] [Indexed: 05/26/2023]
Abstract
Regeneration of lost periodontium is the focus of periodontal therapy. To achieve the effective regeneration, a number of bone graft substitute materials have been developed. This study aimed to investigate the histological response in alveolar bone dehiscences which were filled with an improved biphasic calcium phosphate (BCP) ceramic with more reasonable pore diameter, pore wall thickness and porosity. Twenty-four alveolar bone dehiscences were made surgically in twelve beagle dogs by reflecting mucoperiosteal flaps on the buccal aspect of bilateral lower second premolars and removing alveolar bone. The left dehiscences were treated with BCP ceramic and the contralaterals were cured with the open flap debridement (OFD) as controls. Three dogs were used at week 4, 12, and 24 respectively. Histological observations were processed through three-dimensional micro-computed tomographic imaging, fluorescence and light microscopy. The histological study indicated that the biphasic ceramic was biocompatible, and regeneration was achieved more effectively through the BCP treatment. There were also arrest of epithelial migration apically and formation of new bone and cementum, as well as proliferation of fibrous connective tissues that became attached to the newly formed cementum at week 24, while there was no significant periodontal regeneration in the OFD group only with epithelial tissue migrating into the dehiscence regions. Clinically speaking, though the surgical location formed a limitation to the application of the improved BCP on the periodontal regeneration, the actual result was positive. It proved that the BCP had biocompatibility and was able to act as a stable scaffold to induce periodontal regeneration effectively.
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Affiliation(s)
- Han Shi
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu, People's Republic of China
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Etiologic factors of early-onset periodontal disease in Down syndrome. JAPANESE DENTAL SCIENCE REVIEW 2008. [DOI: 10.1016/j.jdsr.2008.07.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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