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Neuro-inflammation and anti-inflammatory treatment options for Alzheimer's disease
Clinical Biochemistry, 2019
Alzheimer's disease (AD) is a neurodegenerative disease characterized by progressive memory loss and dementia. The pathological characteristics of AD include the deposition of amyloid beta (Aβ), neurofibrillary tangles, and neuronal loss. There is evidence showing the involvement of inflammation in AD, including activated microglia within and surrounding senile plaques. Epidemiological studies suggest the use of anti-inflammatory drugs to reduce incidence of AD. However, clinical trials with anti-inflammatory drugs have not been successful.
Extended results of the Alzheimer’s disease anti-inflammatory prevention trial
Alzheimers & Dementia, 2011
Background-Epidemiologic evidence suggests that non-steroidal anti-inflammatory drugs (NSAIDs) delay onset of Alzheimer's dementia (AD), but randomized trials show no benefit from NSAIDs in symptomatic AD. ADAPT randomized 2,528 elderly persons to naproxen or celecoxib vs. placebo for two years (s.d. 11 months) before treatments were terminated. During the treatment interval, 32 cases of AD revealed increased rates in both NSAID-assigned groups.
Frontiers, 2023
Despite extensive research, no disease-modifying therapeutic option, able to prevent, cure or halt the progression of Alzheimer’s disease [AD], is currently available. AD, a devastating neurodegenerative pathology leading to dementia and death, is characterized by two pathological hallmarks, the extracellular deposits of amyloid beta (Aβ) and the intraneuronal deposits of neurofibrillary tangles (NFTs) consisting of altered hyperphosphorylated tau protein. Both have been widely studied and pharmacologically targeted for many years, without significant therapeutic results. In 2022, positive data on two monoclonal antibodies targeting Aβ, donanemab and lecanemab, followed by the 2023 FDA accelerated approval of lecanemab and the publication of the final results of the phase III Clarity AD study, have strengthened the hypothesis of a causal role of Aβ in the pathogenesis of AD. However, the magnitude of the clinical effect elicited by the two drugs is limited, suggesting that additional pathological mechanisms may contribute to the disease. Cumulative studies have shown inflammation as one of the main contributors to the pathogenesis of AD, leading to the recognition of a specific role of neuroinflammation synergic with the Aβ and NFTs cascades. The present review provides an overview of the investigational drugs targeting neuroinflammation that are currently in clinical trials. Moreover, their mechanisms of action, their positioning in the pathological cascade of events that occur in the brain throughout AD disease and their potential benefit/limitation in the therapeutic strategy in AD are discussed and highlighted as well. In addition, the latest patent requests for inflammation-targeting therapeutics to be developed in AD will also be discussed
The Role of Anti-Inflammatory Drugs in the Prevention and Treatment of Alzheimer's Disease
Annual Review of Medicine, 1996
▪ Risk factor intervention is a useful strategy for prevention of poorly understood diseases. Fifteen studies have examined the relation of glucocorticoid and nonsteroid antiinflammatory treatments and onset or progression of Alzheimer's disease (AD). Fourteen of these studies suggest that such treatments (especially nonsteroidal agents) prevent or ameliorate symptoms of AD. Abundant circumstantial evidence implicates inflammation in the pathogenesis of AD. Inhibition of cyclooxygenases, the central action of nonsteroidal antiinflammatory drugs (but not a prominent effect of steroids), limits inflammation, but it may also alter neural metabolic pathways, resulting in cell death from excitotoxicity or oxidative stress. Randomized controlled trials are needed to determine whether steroids, nonsteroidal antiinflammatory drugs, or both can prevent or treat the symptoms of AD.