Dental Carotid Cognitive Study

NCT ID: NCT03755362

Last Updated: 2021-07-23

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

TERMINATED

Clinical Phase

NA

Total Enrollment

26 participants

Study Classification

INTERVENTIONAL

Study Start Date

2019-04-08

Study Completion Date

2021-02-25

Brief Summary

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Periodontal Disease (PD) is present in 60+% of adults \>65 years and is associated with tobacco smoking, diabetes, and atherosclerosis that worsen inflammation, comorbidities common in older people with mild to moderate cognitive impairment (MCI). Older MCI patients are prone to poor oral hygiene and dental health, which if untreated worsens inflammation-mediated brain and nervous system function, and accelerates progression to dementia. Asymptomatic carotid artery stenosis (ACAS) is often a silent disease detected in only \~10% of older adults, and may have a strong association with MCI. This study examines the effects of intensive therapy for periodontitis on cognition in high-risk older people with ACAS. Results could highlight PD as a readily modifiable risk factor for dementia.

Detailed Description

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Periodontal Disease (PD) is present in 60+% of adults \>65 years and is associated with tobacco smoking, diabetes, and atherosclerosis that worsen inflammation, comorbidities common in older people with mild to moderate cognitive impairment (MCI). Older MCI patients are prone to poor oral hygiene and dental health, which if untreated worsens inflammation-mediated brain and nervous system function, and accelerates progression to dementia. Asymptomatic carotid artery stenosis (ACAS) is often a silent disease detected in only \~10% of older adults, and may have a strong association with MCI. This study examines the effects of intensive therapy for periodontitis on cognition in high-risk older people with ACAS. Results could highlight PD as a readily modifiable risk factor for dementia.

This pilot study examines the hypothesis that intensive treatment of PD (IPT) in older people with MCI and ACAS will attenuate their cognitive decline by reducing oral microbial-mediated inflammation and improving cerebrovascular endothelial function that contribute to neurodegeneration-associated dementia.

The aims are to determine the effects of intensive compared to control PD treatment (randomized: IPT vs. CPT) in 60 MCI subjects with ACAS and PD on 1) Cognitive function (Primary Outcome) and quality of life (Secondary Outcome), and 2) The potential mechanisms mediating these effects

Conditions

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Carotid Stenosis Mild Cognitive Impairment Periodontitis

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

This study will randomize 60 subjects ≥65 years old with asymptomatic carotid artery stenosis (ACAS), mild to moderate cognitive impairment and periodontitis. These 60 patients will be randomized to two groups (intensive vs. standardized periodontal treatment). As randomization will be computer generated, the likelihood of randomization to either group is 50:50.
Primary Study Purpose

PREVENTION

Blinding Strategy

NONE

Study Groups

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Standard treatment (control)

Dental evaluation and dental prophylaxis at baseline, 3, 6, and 9 months and standard oral hygiene instruction.

Group Type ACTIVE_COMPARATOR

Standard Treatment

Intervention Type PROCEDURE

Dental evaluation at baseline, 3, 6, and 9 months.

Intensive Treatment

Dental evaluation at baseline, 3, 6, and 9 months. Plus one or more sessions as needed at baseline of full mouth supra- and sub-gingival scaling and root planing, plus oral hygiene instruction. Additional sessions as necessary to remove remaining local factors and treat inflammation and bacteria overgrowth. Additional evaluations and therapy at 2 months or as needed based on therapeutic response. If bleeding on probing levels do not decrease to \<20% of sites following initial therapy or at subsequent visits, intermediate treatment visits will be scheduled. Each participant will be instructed to use half of a capful of 0.12% chlorhexidine twice a day during active treatment including two weeks beyond the treatment visit.

Group Type EXPERIMENTAL

Intensive Treatment

Intervention Type PROCEDURE

Dental evaluation at baseline, 3, 6, and 9 months. Plus one or more sessions as needed at baseline of full mouth supra- and sub-gingival scaling and root planing, plus oral hygiene instruction. Additional sessions as necessary to remove remaining local factors and treat inflammation and bacteria overgrowth. Additional evaluations and therapy at 2 months or as needed based on therapeutic response. If bleeding on probing levels do not decrease to \<20% of sites following initial therapy or at subsequent visits, intermediate treatment visits will be scheduled. Each participant will be instructed to use half of a capful of 0.12% chlorhexidine twice a day during active treatment including two weeks beyond the treatment visit.

Interventions

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Standard Treatment

Dental evaluation at baseline, 3, 6, and 9 months.

Intervention Type PROCEDURE

Intensive Treatment

Dental evaluation at baseline, 3, 6, and 9 months. Plus one or more sessions as needed at baseline of full mouth supra- and sub-gingival scaling and root planing, plus oral hygiene instruction. Additional sessions as necessary to remove remaining local factors and treat inflammation and bacteria overgrowth. Additional evaluations and therapy at 2 months or as needed based on therapeutic response. If bleeding on probing levels do not decrease to \<20% of sites following initial therapy or at subsequent visits, intermediate treatment visits will be scheduled. Each participant will be instructed to use half of a capful of 0.12% chlorhexidine twice a day during active treatment including two weeks beyond the treatment visit.

Intervention Type PROCEDURE

Eligibility Criteria

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Inclusion Criteria

* Age equal to or greater than 65 years.
* Body Mass Index 18-35 kg/m2
* Mild to moderate periodontitis
* Mild to moderate cognitive impairment on Montreal Cognitive Assessment (MoCA) -range greater than or equal to 17 and less than or equal to 26 (i.e., range from 17-26).
* Detectable carotid plaque and carotid artery stenosis \<70% as diagnosed by doppler ultrasound.
* Able to perform prescribed dental hygiene and travel to medical center as required to participate in the study.

Exclusion Criteria

* Inability to provide informed consent.
* Subjects with inability to perform cognitive and other research testing
* Prior stroke, depression (CESD \>16), neurologic or psychiatric disease that would affect cognitive testing, participation, and compliance to the research study.
* Subjects requiring chronic treatment with systemic corticosteroids or other systemic immunosuppressive drugs or drugs that would affect the dental treatments in the protocol are excluded.
* Subjects requiring essential dental care (e.g., treatment for grossly decayed teeth, broken teeth, dental abscesses, peri-apical infections, other dental infections).
* Inability to perform FDG-PET due to renal disease (eGFR \<30 mL/min/1.75m2).
* Receiving anticoagulant therapy (Warfarin) with an INR greater than 3.3 at time of dental treatment or with a bleeding disorder, or other diseases that may interfere with dental therapy.
* Subjects with medical conditions that the clinicians feel would limit their ability to participate.
Minimum Eligible Age

60 Years

Maximum Eligible Age

100 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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University of Maryland, College Park

OTHER

Sponsor Role collaborator

Baltimore VA Medical Center

FED

Sponsor Role collaborator

University of Maryland, Baltimore

OTHER

Sponsor Role lead

Responsible Party

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Brajesh Lal

Study Principal Investigator

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Kimberlly Nordstrom, CCRC

Role: STUDY_DIRECTOR

University of Maryland, College Park

Locations

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University of Maryland - Administrative Center

Baltimore, Maryland, United States

Site Status

Countries

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United States

References

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Gorelick PB, Scuteri A, Black SE, Decarli C, Greenberg SM, Iadecola C, Launer LJ, Laurent S, Lopez OL, Nyenhuis D, Petersen RC, Schneider JA, Tzourio C, Arnett DK, Bennett DA, Chui HC, Higashida RT, Lindquist R, Nilsson PM, Roman GC, Sellke FW, Seshadri S; American Heart Association Stroke Council, Council on Epidemiology and Prevention, Council on Cardiovascular Nursing, Council on Cardiovascular Radiology and Intervention, and Council on Cardiovascular Surgery and Anesthesia. Vascular contributions to cognitive impairment and dementia: a statement for healthcare professionals from the american heart association/american stroke association. Stroke. 2011 Sep;42(9):2672-713. doi: 10.1161/STR.0b013e3182299496. Epub 2011 Jul 21.

Reference Type BACKGROUND
PMID: 21778438 (View on PubMed)

Smith JA, Das A, Ray SK, Banik NL. Role of pro-inflammatory cytokines released from microglia in neurodegenerative diseases. Brain Res Bull. 2012 Jan 4;87(1):10-20. doi: 10.1016/j.brainresbull.2011.10.004. Epub 2011 Oct 18.

Reference Type BACKGROUND
PMID: 22024597 (View on PubMed)

Leszek J, Barreto GE, Gasiorowski K, Koutsouraki E, Avila-Rodrigues M, Aliev G. Inflammatory Mechanisms and Oxidative Stress as Key Factors Responsible for Progression of Neurodegeneration: Role of Brain Innate Immune System. CNS Neurol Disord Drug Targets. 2016;15(3):329-36. doi: 10.2174/1871527315666160202125914.

Reference Type BACKGROUND
PMID: 26831258 (View on PubMed)

Miklossy J, McGeer PL. Common mechanisms involved in Alzheimer's disease and type 2 diabetes: a key role of chronic bacterial infection and inflammation. Aging (Albany NY). 2016 Apr;8(4):575-88. doi: 10.18632/aging.100921.

Reference Type BACKGROUND
PMID: 26961231 (View on PubMed)

Otomo-Corgel J, Pucher JJ, Rethman MP, Reynolds MA. State of the science: chronic periodontitis and systemic health. J Evid Based Dent Pract. 2012 Sep;12(3 Suppl):20-8. doi: 10.1016/S1532-3382(12)70006-4.

Reference Type BACKGROUND
PMID: 23040337 (View on PubMed)

Daulatzai MA. Cerebral hypoperfusion and glucose hypometabolism: Key pathophysiological modulators promote neurodegeneration, cognitive impairment, and Alzheimer's disease. J Neurosci Res. 2017 Apr;95(4):943-972. doi: 10.1002/jnr.23777. Epub 2016 Jun 27.

Reference Type BACKGROUND
PMID: 27350397 (View on PubMed)

Teixeira FB, Saito MT, Matheus FC, Prediger RD, Yamada ES, Maia CSF, Lima RR. Periodontitis and Alzheimer's Disease: A Possible Comorbidity between Oral Chronic Inflammatory Condition and Neuroinflammation. Front Aging Neurosci. 2017 Oct 10;9:327. doi: 10.3389/fnagi.2017.00327. eCollection 2017.

Reference Type BACKGROUND
PMID: 29085294 (View on PubMed)

Fouad A, Mongodin E, Hittle L, et al. Microbiome analysis of oral and atheromatous plaques in atherosclerotic patients. In: IADR General Session and Exhibition. 2014

Reference Type BACKGROUND

Emery DC, Shoemark DK, Batstone TE, Waterfall CM, Coghill JA, Cerajewska TL, Davies M, West NX, Allen SJ. 16S rRNA Next Generation Sequencing Analysis Shows Bacteria in Alzheimer's Post-Mortem Brain. Front Aging Neurosci. 2017 Jun 20;9:195. doi: 10.3389/fnagi.2017.00195. eCollection 2017.

Reference Type BACKGROUND
PMID: 28676754 (View on PubMed)

Caminiti SP, Ballarini T, Sala A, Cerami C, Presotto L, Santangelo R, Fallanca F, Vanoli EG, Gianolli L, Iannaccone S, Magnani G, Perani D; BIOMARKAPD Project. FDG-PET and CSF biomarker accuracy in prediction of conversion to different dementias in a large multicentre MCI cohort. Neuroimage Clin. 2018 Jan 28;18:167-177. doi: 10.1016/j.nicl.2018.01.019. eCollection 2018.

Reference Type BACKGROUND
PMID: 29387532 (View on PubMed)

Ide M, Harris M, Stevens A, Sussams R, Hopkins V, Culliford D, Fuller J, Ibbett P, Raybould R, Thomas R, Puenter U, Teeling J, Perry VH, Holmes C. Periodontitis and Cognitive Decline in Alzheimer's Disease. PLoS One. 2016 Mar 10;11(3):e0151081. doi: 10.1371/journal.pone.0151081. eCollection 2016.

Reference Type BACKGROUND
PMID: 26963387 (View on PubMed)

Other Identifiers

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HP-00082777

Identifier Type: -

Identifier Source: org_study_id

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