The pulse of drug development for Alzheimer's disease

Michael S Rafii1

  • 1Alzheimer's Disease Cooperative Study, Attending Neurologist, Shiley-Marcos Alzheimer's Disease Research Center, University of California, San Diego, USA. mrafii@ucsd.edu

Insights

New Alzheimer's disease therapies targeting beta-amyloid and tau protein are advancing to human clinical trials. This review examines the scientific basis and current status of these promising Alzheimer's treatments.

Area of Science:

  • Neuroscience
  • Pharmacology
  • Gerontology

Background:

  • Alzheimer's disease pathogenesis involves beta-amyloid accumulation and hyperphosphorylated tau protein.
  • Neurofibrillary tangles of paired helical filaments are implicated in Alzheimer's disease progression.

Purpose of the Study:

  • To review the current status of Alzheimer's disease therapies in human clinical trials.
  • To discuss the scientific rationale behind emerging Alzheimer's treatment strategies.

Main Methods:

  • Literature review of ongoing clinical trials for Alzheimer's disease therapeutics.
  • Analysis of the scientific basis for targeting beta-amyloid and tau protein.

Main Results:

  • A significant increase in late-stage clinical trials for Alzheimer's agents.
  • Multiple therapeutic strategies are under investigation, targeting key disease mechanisms.

Conclusions:

  • Therapies targeting core Alzheimer's disease mechanisms are progressing rapidly.
  • Further research and clinical evaluation are crucial for developing effective treatments.

Related Concept Videos

Alzheimer's Disease: Treatment01:22

Alzheimer's Disease: Treatment

Alzheimer's Disease (AD), a neurodegenerative disorder, is pathologically identified by amyloid plaques and neurofibrillary tangles composed of tau protein. AD pharmacotherapy aims to manage cognitive symptoms, delay disease progression, and treat behavioral symptoms. The treatment is primarily symptomatic and palliative, with no definitive disease-modifying therapy available. Cholinesterase inhibitors, including donepezil (Aricept), rivastigmine (Exelon), and galantamine (Razadyne), are...
Alzheimer's Disease: Overview01:26

Alzheimer's Disease: Overview

Alzheimer's Disease (AD) is a continually advancing neurodegenerative disorder, distinguished by escalating memory loss, cognitive dysfunction, and dementia. The disease unfolds in three stages: preclinical, mild cognitive impairment (MCI), and dementia. Its onset is insidious, and the progression gradual, with the cause not well explained by other disorders.
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ and tau...
Alzheimer Disease l: Introduction01:29

Alzheimer Disease l: Introduction

Alzheimer disease is a chronic, progressive, and irreversible neurodegenerative disorder and the most common cause of dementia in older adults. It leads to gradual neuronal loss, causing cognitive decline, behavioral changes, and loss of functional independence.Risk Factors and EtiologyThe disease is multifactorial. Age is the strongest risk factor, with prevalence doubling every 5 years after age 65. Genetic factors include mutations in genes such as APP, PSEN1, and PSEN2, which are associated...
Alzheimer Disease ll: Pathophysiology01:23

Alzheimer Disease ll: Pathophysiology

Alzheimer disease involves structural changes in the brain that begin long before symptoms appear. The most distinctive features are extracellular neuritic plaques and intracellular neurofibrillary tangles.Neuritic plaques form in the cerebral cortex and around blood vessels. These plaques contain a dense core of beta-amyloid (Aβ)—a toxic protein fragment that clumps outside neurons. The core is surrounded by damaged neuronal extensions, as well as reactive astrocytes and microglia. Abnormal...
Drug Administration and Therapy Phases: Overview01:26

Drug Administration and Therapy Phases: Overview

Drugs, the chemical agents used in diagnosing, treating, or preventing diseases, undergo a four-phase process of development: pharmaceutic, pharmacokinetics, pharmacodynamics, and therapeutic.
The pharmaceutical phase focuses on leveraging the physicochemical properties of the drug to design and manufacture an effective product. Variants include orally administered tablets or capsules, topical creams or ointments, and parenteral-delivery solutions or emulsions.
The pharmacokinetic phase...
Clinical Trials: Overview01:11

Clinical Trials: Overview

Clinical development focuses on how the drug will interact with the human body and encompasses four key phases of clinical trials, each serving a specific purpose in assessing the safety and effectiveness of new drugs. These phases overlap and build upon one another. Phase I involves a small group of healthy volunteers (typically 20-80 individuals) or, in cases where significant toxicity is expected, patients with the targeted disease, such as cancer or AIDS. The volunteers are tested for...