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Related Concept Videos

Alzheimer Disease l: Introduction01:29

Alzheimer Disease l: Introduction

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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...
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Genetic polymorphisms in drug targets have emerged as critical determinants of interindividual variability in drug response and toxicity. Pharmacogenomic investigations increasingly focus on identifying these variations to personalize and optimize therapeutic interventions. A drug target may be a receptor, enzyme, or signaling protein involved in pharmacologic responses or disease-related pathways. While early pharmacogenetic studies focused primarily on drug metabolism, current research...
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The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes. 
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Optimized Negative Staining: a High-throughput Protocol for Examining Small and Asymmetric Protein Structure by Electron Microscopy
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Concerning the structure of apoE.

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Apolipoprotein E4 (apoE4) increases Alzheimer's risk due to a single amino acid change. Understanding structural differences between apoE3 and apoE4 is key to developing treatments.

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Area of Science:

  • Biochemistry
  • Neuroscience
  • Genetics

Background:

  • Apolipoprotein E (apoE) is crucial for lipid metabolism.
  • The apoE4 isoform is a significant risk factor for late-onset Alzheimer's disease.
  • Structural insights into apoE isoforms are limited.

Purpose of the Study:

  • To elucidate the structural differences between apoE3 and apoE4.
  • To understand how structural variations impact apoE function and Alzheimer's risk.
  • To provide a basis for therapeutic strategies targeting apoE4.

Main Methods:

  • Protein structure determination of full-length apoE3.
  • Comparative analysis of apoE3 and apoE4 structures.
  • Investigating domain interactions within apoE.

Main Results:

  • Determined the structure of the two-domain full-length apoE3 protein.
  • Confirmed that N-terminal domain mutations can affect the C-terminal domain.
  • Highlighted the critical single amino acid difference between apoE3 and apoE4.

Conclusions:

  • Structural understanding of apoE isoforms is essential for Alzheimer's research.
  • Targeting structural differences may offer therapeutic avenues.
  • Further research into apoE structure-function relationships is warranted.