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Network-based rTMS in Alzheimer's Disease

2020-02-16 17:41:16 | BioPortfolio

Summary

Severe alterations of brain networks connectivity have been described in Alzheimer's disease (AD). Repetitive Transcranial Magnetic Stimulation (rTMS) has gained evidence as an effective tool to modulate brain networks connectivity, leading to a recovery or reorganization of both local and remote brain regions functionally connected to the stimulated area. The investogators propose an innovative tailored network-based rTMS treatment to ameliorate cognitive symptoms in mild AD, through the boosting of connectivity within brain networks affected by AD pathophysiology. The combination of the proposed intervention with an integrated multi-modal imaging approach will allow to evaluate the neural mechanisms underlying the clinical response to the treatment and to define quantitative markers of clinical impact on AD. If successful, the present proposal would immediately impact on patient's quality of life, with important implications for the time and costs of delivery of rehabilitative services.

Description

Currently, no effective cure is available for Alzheimer's disease (AD). Repetitive Transcranial Magnetic Stimulation (rTMS) has gained increasing attention as a potential treatment for various neurological and psychiatric disorders, but available rTMS studies are flawed by inaccurate anatomical targeting, inadequate sample size, unsatisfactory controls and lacking blindness. To date, the elective target area of rTMS interventions in AD has been the dorsolateral prefrontal cortex (DLPFC), a core area of the Central Executive network (CEN), which plays a key role in regulating executive functions, attention and working memory. While the CEN has recently been described as dysfunctional in AD, AD pathophysiology has been mainly associated with the breakdown of the Default Mode network (DMN) and with structural disconnection of its parietal nodes. The DMN plays a crucial role in episodic memory retrieval and incorporates various brain regions, among which parietal areas are highly connected with the rest of the brain. The present multicenter, double-blind, randomized and placebo-controlled study has the ambition to provide evidence of the efficacy of two tailored network-based rTMS treatments in mild AD, through the enhancement of connectivity of CEN and DMN. Innovative integrated multi-modal imaging investigations will further enrich this proposal allowing to identify quantifiable markers underlying the clinical impact of rTMS on AD.

Study Design

Conditions

Alzheimer Disease, Late Onset

Intervention

rTMS, Sham rTMS

Location

IRCCS Centro San Giovanni di Dio Fatebenefratelli
Brescia
Lombardia
Italy
25125

Status

Active, not recruiting

Source

IRCCS Centro San Giovanni di Dio Fatebenefratelli

Results (where available)

View Results

Links

Published on BioPortfolio: 2020-02-16T17:41:16-0500

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Medical and Biotech [MESH] Definitions

Pathological conditions (Disorder, SYNDROME, or DISEASE) whose SIGNS AND SYMPTOMS manifest late in the life of an individual.

Rheumatoid arthritis of children occurring in three major subtypes defined by the symptoms present during the first six months following onset: systemic-onset (Still's Disease, Juvenile-Onset), polyarticular-onset, and pauciarticular-onset. Adult-onset cases of Still's disease (STILL'S DISEASE, ADULT-ONSET) are also known. Only one subtype of juvenile rheumatoid arthritis (polyarticular-onset, rheumatoid factor-positive) clinically resembles adult rheumatoid arthritis and is considered its childhood equivalent.

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A chromosome disorder associated either with an extra chromosome 21 or an effective trisomy for chromosome 21. Clinical manifestations include hypotonia, short stature, brachycephaly, upslanting palpebral fissures, epicanthus, Brushfield spots on the iris, protruding tongue, small ears, short, broad hands, fifth finger clinodactyly, Simian crease, and moderate to severe MENTAL RETARDATION. Cardiac and gastrointestinal malformations, a marked increase in the incidence of LEUKEMIA, and the early onset of ALZHEIMER DISEASE are also associated with this condition. Pathologic features include the development of NEUROFIBRILLARY TANGLES in neurons and the deposition of AMYLOID BETA-PROTEIN, similar to the pathology of ALZHEIMER DISEASE. (Menkes, Textbook of Child Neurology, 5th ed, p213)

An allelic disorder of TYPE A NIEMANN-PICK DISEASE, a late-onset form. It is also caused by mutation in SPHINGOMYELIN PHOSPHODIESTERASE but clinical signs involve only visceral organs (non-neuropathic type).

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