期刊
JOURNAL OF HISTOCHEMISTRY & CYTOCHEMISTRY
卷 50, 期 4, 页码 463-472出版社
HISTOCHEMICAL SOC INC
DOI: 10.1177/002215540205000403
关键词
Alzheimer's disease; neurofibrillary tangles; transentorhinal cortex; thioflavin S; silver staining; immunohistochemistry
类别
资金
- NINDS NIH HHS [3R01 NS 39345-01] Funding Source: Medline
An improved thioflavin-S stain, Gallyas silver stain, and two immunostainings were quantitatively compared for demonstration of neurofibrillary tangles (NFTs) on the same sections. Sections of hippocampal formation from seven cases of Alzheimer's disease (AD) were immunofluorescently stained with a commercially available polyclonal NFT antibody or a PHF-1 monoclonal antibody, followed by an improved thioflavin-S stain, and finally by Gallyas silver staining. The thioflavin-S method was improved by using a combination quenching method that removes background autofluorescence without remarkable tissue damage and by post-treatment with concentrated phosphate buffer, which minimizes photobleaching. PHF-1 or NFT immunostaining is much less sensitive than the improved thioflavin-S staining and Gallyas silver staining, particularly in the transentorhinal region. Moreover PHF-1 immunoreactivity varied greatly among AD individuals. Thioflavin-S staining and Gallyas silver staining show almost the same sensitivity in NFT demonstration, but only the former depends on the secondary protein structure of NFTs. This study suggests that the improved thioflavin-S staining is a simple, sensitive, and consistent method for demonstration of neurofibrillary pathology.
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