Neurochem Inc. (NASDAQ: NRMX; TSX: NRM) is pleased to announce that Neurobiology of Aging, one of the world's leading peer-reviewed medical journals in the fields of gerontology and neuroscience, has published an online version of a publication on the preclinical development of tramiprosate (3-amino-1-propanesulfonic acid; Alzhemed), including efficacy results in a mouse model of brain amyloidosis. Tramiprosate (Alzhemed) represents a potential new class of therapeutic agent and is Neurochem's investigational product candidate for the treatment of Alzheimer's disease (AD). The results presented in this paper include the amyloid binding and neuroprotective characteristics of tramiprosate (Alzhemed) and provide evidence for the potential disease-modifying effect of this product candidate to slow or arrest the progression of AD.

While the paper issue of the publication will be available in a future issue of Neurobiology of Aging, an electronic version of the article entitled "Targeting soluble Aβ peptide with Tramiprosate for the treatment of brain amyloidosis" is already accessible online, and can be found at http://www.sciencedirect.com by searching for "tramiprosate".

Findings about tramiprosate (Alzhemed) include:

• Tramiprosate (Alzhemed) binds preferentially to soluble Aβ peptide and maintains Aβ in a non-fibrillar form.
• Tramiprosate (Alzhemed) decreases by 38% (p-value < 0.01) Aβ42-induced cell death in primary rat neuronal cell cultures.
• Tramiprosate (Alzhemed) treatment in a transgenic mouse model of brain amyloidosis resulted in a dose-dependent reduction of over 60% of Aβ levels in plasma. There were significant decreases in brain levels of both soluble Aβ40 (30%; p-value of 0.014) and insoluble Aβ40 (31%; p-value of 0.035). Corresponding decreases of 25% (p-value of 0.033) and 22% (p-value of 0.029) were observed for the soluble a
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Contact: Lise Hébert, PhD
lhebert@neurochem.com
450-680-4570
Neurochem, Inc.
30-May-2006


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