Shock membrane electropotential drops and limited diffusive distance of β-amyloids in cerebral neurons are detrimental enhancement to Alzheimer's diseases

Chi Huan Chang, Chiung Huei Peng, Kuan Chou Chen, Hsien Bin Huang, Wen Ta Chiu, Robert Y. Peng

Research output: Contribution to journalArticle

2 Citations (Scopus)


Molecular physicobiochemical calculations indicated that the metallic ion binding to beta-amyloids (Aβ) may induce production of hydrogen peroxide, which triggers the Ca ion redistribution from the extracellular to the intracellular compartmentation, resulting in a transient membrane electropotential drop by at least 208.06 mV. Moreover, using the Mark and Houwink empirical equation, we predicted that the diffusible distances of all Aβ identities would be confined in a very tiny region within a radius less than 3.96 × 10-4 cm in brain at 192 h after produced. Because of the inherent tendency of aggregation behaved by the Aβs, the maximum diffusion coefficient and inherent viscosity were 8.24 × 10-15 cm2 s-1 and 72.15 cps for the 12 mers (40.8 kDa), the largest soluble form of ABs. Conclusively, we have quantitatively predicted that the shock membrane potential drop (Δφ > 208.06 mV) and limited diffusible distance (-4 cm) in the brain would contribute the major detrimental effects to the neurons in the Alzheimer's diseases.

Original languageEnglish
Pages (from-to)339-345
Number of pages7
JournalColloids and Surfaces B: Biointerfaces
Issue number2
Publication statusPublished - Oct 15 2009



  • β-Amyloid
  • Diffusion
  • Membrane Nernst potential
  • Viscosity

ASJC Scopus subject areas

  • Biotechnology
  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry
  • Surfaces and Interfaces

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