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No association between the a2-macroglobulin (A2M) deletion and Alzheimer's disease, and no change in A2M mRNA, protein, or protein expression
Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för nervsystem och rörelseorgan, Geriatrik. Östergötlands Läns Landsting, MC - Medicincentrum, Geriatrik-LAH.
Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för nervsystem och rörelseorgan, Geriatrik. Östergötlands Läns Landsting, MC - Medicincentrum, Geriatrik-LAH.ORCID-id: 0000-0003-0194-8402
2000 (Engelska)Ingår i: Journal of neural transmission, ISSN 0300-9564, E-ISSN 1435-1463, Vol. 107, nr 8-9, s. 1065-1079Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

A polymorphism consisting of a deletion near the 5' splice site of exon 18 on the a2-macroglobulin (A2M) gene (A2M-2) has been suggested to be associated with Alzheimer's disease (AD) in family-based studies. We studied the A2M-2 allele together with the ApoE alleles in a large series on patients with AD (n = 449) and age-matched controls (n = 349). Neuropathologically confirmed diagnoses were available in 199 cases (94 AD and 107 control cases). We found no increase in A2M-2 genotype or allele frequencies in AD (27.5% and 14.6%) versus controls (26.4% and 14.9%). In contrast, a marked increase (p < 0.0001) in ApoE e4 genotype or allele frequencies was found in AD (66.6% and 41.2%) as compared with controls (29.8% and 16.5%), suggesting sufficient statistical power in our sample. No relation was found between the A2M-2 and the ApoE e4 allele. No change in A2M exon 17-18mRNA size or sequence or A2M protein size was found in cases carrying the A2M-2 deletion, suggesting that there is no biological consequences of the A2M intronic deletion. No change in A2M protein level in cerebrospinal fluid was found in AD, suggesting that the A2M-2 allele does not effect the A2M protein expression in the brain. The lack of an association between the A2M-2 allele and AD in the present study, and the lack of abnormalities in the A2M mRNA or protein suggest that the A2M-2 allele is not associated with AD.

Ort, förlag, år, upplaga, sidor
2000. Vol. 107, nr 8-9, s. 1065-1079
Nationell ämneskategori
Medicin och hälsovetenskap
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URN: urn:nbn:se:liu:diva-27884DOI: 10.1007/s007020070052Lokalt ID: 12644OAI: oai:DiVA.org:liu-27884DiVA, id: diva2:248436
Tillgänglig från: 2009-10-08 Skapad: 2009-10-08 Senast uppdaterad: 2019-06-27

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Marcusson, JanNägga, Katarina

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