PMID- 10441572 OWN - NLM STAT- MEDLINE DCOM- 19991004 LR - 20220409 IS - 0002-9297 (Print) IS - 0002-9297 (Linking) VI - 65 IP - 3 DP - 1999 Sep TI - Early-onset autosomal dominant Alzheimer disease: prevalence, genetic heterogeneity, and mutation spectrum. PG - 664-70 AB - To determine the prevalence of early-onset Alzheimer disease (EOAD) and of autosomal dominant forms of EOAD (ADEOAD), we performed a population-based study in the city of Rouen (426,710 residents). EOAD was defined as onset of disease at age <61 years, and ADEOAD was defined as the occurrence of at least three EOAD cases in three generations. Using these stringent criteria, we calculated that the EOAD and ADEOAD prevalences per 100,000 persons at risk were 41.2 and 5.3, respectively. We then performed a mutational analysis of the genes for amyloid precursor protein (APP), presenilin 1 (PSEN1), and presenilin 2 (PSEN2) in 34 families with ADEOAD ascertained in France. In 19 (56%) of these families, we identified 16 distinct PSEN1 missense mutations, including 4 (Thr147Ile, Trp165Cys, Leu173Trp, and Ser390Ile) not reported elsewhere. APP mutations, including a novel mutation located at codon 715, were identified in 5 (15%) of the families. In the 10 remaining ADEOAD families and in 9 additional autosomal dominant Alzheimer disease families that did not fulfill the strict criteria for ADEOAD, no PSEN1, PSEN2, or APP mutation was identified. These results show that (1) PSEN1 and APP mutations account for 71% of ADEOAD families and (2) nonpenetrance at age <61 years is probably infrequent for PSEN1 or APP mutations. FAU - Campion, D AU - Campion D AD - INSERM EPI 9906, Faculte de Medecine, 76183 Rouen, France. FAU - Dumanchin, C AU - Dumanchin C FAU - Hannequin, D AU - Hannequin D FAU - Dubois, B AU - Dubois B FAU - Belliard, S AU - Belliard S FAU - Puel, M AU - Puel M FAU - Thomas-Anterion, C AU - Thomas-Anterion C FAU - Michon, A AU - Michon A FAU - Martin, C AU - Martin C FAU - Charbonnier, F AU - Charbonnier F FAU - Raux, G AU - Raux G FAU - Camuzat, A AU - Camuzat A FAU - Penet, C AU - Penet C FAU - Mesnage, V AU - Mesnage V FAU - Martinez, M AU - Martinez M FAU - Clerget-Darpoux, F AU - Clerget-Darpoux F FAU - Brice, A AU - Brice A FAU - Frebourg, T AU - Frebourg T LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Am J Hum Genet JT - American journal of human genetics JID - 0370475 RN - 0 (Amyloid beta-Protein Precursor) RN - 0 (Codon) RN - 0 (Membrane Proteins) RN - 0 (PSEN1 protein, human) RN - 0 (PSEN2 protein, human) RN - 0 (Presenilin-1) RN - 0 (Presenilin-2) SB - IM MH - Adult MH - *Age of Onset MH - Aged MH - Alzheimer Disease/diagnosis/*epidemiology/*genetics MH - Amino Acid Substitution MH - Amyloid beta-Protein Precursor/genetics MH - Codon/genetics MH - DNA Mutational Analysis MH - Exons/genetics MH - Female MH - France/epidemiology MH - Gene Frequency MH - *Genes, Dominant MH - *Genetic Heterogeneity MH - Genotype MH - Humans MH - Male MH - Membrane Proteins/genetics MH - Middle Aged MH - Mutation/*genetics MH - Pedigree MH - Penetrance MH - Presenilin-1 MH - Presenilin-2 MH - Prevalence PMC - PMC1377972 EDAT- 1999/08/12 10:00 MHDA- 2000/03/21 09:00 CRDT- 1999/08/12 10:00 PHST- 1999/08/12 10:00 [pubmed] PHST- 2000/03/21 09:00 [medline] PHST- 1999/08/12 10:00 [entrez] AID - S0002-9297(07)62317-9 [pii] AID - 10.1086/302553 [doi] PST - ppublish SO - Am J Hum Genet. 1999 Sep;65(3):664-70. doi: 10.1086/302553.