Journals / Türk Nöroloji Dergisi / 2021 / Cilt: 27 - Sayı: 2

Association between PSEN1 p.E318G Variant and APOE Polymorphism and Alzheimer Disease in Turkish Patients

Türk Hastalarda PSEN1 p.E318G Varyantı ile APOE Polimorfizmi ve Alzheimer Hastalığı Arasındaki İlişki

Pages
117–122
Publication Date
2022-11-06
DOI
—
🏛️Bibliographic metadata and full text access for this article are provided via DergiPark.
DergiPark Record ↗
✨

AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

APOE ε4 allele carriers had an increased risk for AD compared with non-carriers both in familial [odds ratio (OR): 3.67, 95% confidence interval (CI): (2.69-4.99); p

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Objective: Mutations in the Presenilin-1 (PSEN1) gene have been associated with early-onset familial Alzheimer disease (AD) and these mutations usually exhibit full penetrance.
📊
Key Findings & Data:However, the p.E318G variant located at exon 9 of PSEN1 is an exception.
💡
Conclusion & Impact:APOE ε4 allele carriers had an increased risk for AD compared with non-carriers both in familial [odds ratio (OR): 3.67, 95% confidence interval (CI): (2.69-4.99); p
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Objective: Mutations in the Presenilin-1 (PSEN1) gene have been associated with early-onset familial Alzheimer disease (AD) and these mutations usually exhibit full penetrance. However, the p.E318G variant located at exon 9 of PSEN1 is an exception. This variant is also seen in non-demented controls other than patients with AD suggesting that it may be a rare polymorphism or a mutation with low penetrance. In addition, results from studies conducted in different populations investigating the role of p.E318G variant in AD were conflicting. In this study, we aimed to determine the frequency of the PSEN1 p.E318G variant and APOE genotypes in a Turkish cohort and to investigate whether they were associated with the risk of AD. Materials and Methods: The study included 217 patients with familial AD, 153 patients with sporadic AD, and 402 controls. The PSEN1 p.E318G and APOE genotypes were determined using real-time polymerase chain reaction with hydrolysis probes. Results: The p.E318G variant was found in five patients with familial AD, three patients with sporadic AD, and 11 control subjects. There was no significant difference in the distribution of the p.E318G variant between patients and controls in familial and sporadic forms. APOE ε4 allele carriers had an increased risk for AD compared with non-carriers both in familial [odds ratio (OR): 3.67, 95% confidence interval (CI): (2.69-4.99); p

Özet

Amaç: Presenilin-1 (PSEN1) genindeki mutasyonlar, erken başlangıçlı ailevi Alzheimer hastalığı (AH) ile ilişkilendirilmiştir ve bu mutasyonlar çoğunlukla tam penetrans gösterir. Ancak PSEN1 geninin 9 ekzonundaki p.E318G varyantı bunlar içinde bir istisnadır. p.E318G varyantının AH hastaları dışında demans olmayan kontrollerde de gösterilmesi, onun nadir bir polimorfizm ya da düşük penetranslı bir mutasyon olabileceğini düşündürmektedir. Bu varyantın AH’de patojenik rolü olup olmadığını araştıran ve birçok farklı popülasyonda gerçekleştirilen çalışmalarda çelişkili sonuçlar elde edilmiştir. Bu çalışmada, AH hastalarında ve kontrollerde PSEN1 p.E318G varyantının ve APOE genotiplerinin sıklığını belirlemeyi ve Türk kohortunda AH riski ile ilişkili olup olmadıklarını araştırmayı amaçladık. Gereç ve Yöntem: Çalışmaya 217 ailevi AH ve 153 sporadik AH hastası ve 402 kontrol dahil edildi. Hasta ve kontrollerin p.E318G ve APOE genotipleri hidroliz problar kullanılarak gerçek zamanlı polimeraz zincir reaksiyonu yöntemi ile belirlendi. Bulgular: p.E318G varyantı beş ailevi AH hastası, üç sporadik AH hastası, ve on bir kontrol örneğinde bulundu. Ailevi ve sporadik formlarda hastalar ve kontroller arasında p.E318G varyantının dağılımı açısından anlamlı bir farklılık görülmedi. APOE ε4 allel taşıyıcılarının taşımayanlara göre AH riskinin hem ailesel [olasılık oranı (OO): 3,67, %95 güven aralığı (GA): 2,69-4,99, p

🔖

Cite This Article

BİLGİÇ, B., GÜRVİT, H., HANAĞASI, H., GÜVEN, G., LOHMANN, E., ÜNALTUNA, N. E., ASLAN, R., DÖNMEZ, Ç. (2022). Association between PSEN1 p.E318G Variant and APOE Polymorphism and Alzheimer Disease in Turkish Patients. Türk Nöroloji Dergisi, Cilt: 27 - Sayı: 2, 117–122. https://ajindex.com/articles/636555

📄 Full Text PDF Viewer

📄

PDF görüntüleyici hazırlanıyor...

References (13)

  1. Cacace R, Sleegers K, Van Broeckhoven C. Molecular genetics of early-onset Alzheimer’s disease revisited. Alzheimers Dement 2016;12:733-748
  2. Abdala BB, dos Santos JM, Gonçalves AP, et al. Influence of low frequency PSEN1 variants on familial Alzheimer’s disease risk in Brazil. Neurosci Lett 2017;653:341-345
  3. Artuso V, Benussi L, Ghidoni R, et al. Asymptomatic carriers of presenilin-1 E318G variant show no cerebrospinal fluid biochemical signs suggestive of alzheimer’s disease in a family with late-onset dementia. Curr Alzheimer Res 2018;16:1-7
  4. Benitez BA, Karch CM, Cai Y, et al. The PSEN1, p.E318G variant increases the risk of alzheimer’s disease in APOE-ε4 carriers. PLoS Genet 2013;9:e1003685. doi:10.1371/journal.pgen.1003685 5. Hippen AA, Ebbert MTW, Norton MC, et al. Presenilin E318G variant and Alzheimer’s disease risk: The Cache County study. BMC Genomics 2016;17(Suppl 3):10-14
  5. Cruts M, Van Broeckhoven C. Presenilin mutations in Alzheimer’s disease. Hum Mutat 1998;11:183-190
  6. McKhann GM, Knopman DS, Chertkow H, et al. The diagnosis of dementia due to Alzheimers disease: Recommendations from the National Institute on Aging-Alzheimer’s Association workgroups on diagnostic guidelines for Alzheimer’s disease. Alzheimer’s Dement 2011;7:263-269
  7. Vetrivel KS, Zhang YW, Xu H, Thinakaran G. Pathological and physiological functions of presenilins. Mol Neurodegener 2006;1:1-12
  8. Cruts M, Van Duijn CM, Backhovens H, et al. Estimation of the genetic contribution of presenilin-1 and -2 mutations in a population-based study of presenilin Alzheimer disease. Hum Mol Genet 1998;7:43-51
  9. Sandbrink R, Zhang D, Schaeffer S, et al. Missense mutations of the PS-1/ S182 gene in German early-onset Alzheimer’s disease patients. Ann Neurol 1996;40:265-266
  10. Forsell C, Froelich S, Axelman K, et al. A novel pathogenic mutation (Leu262Phe) found in the presenilin 1 gene in early-onset Alzheimer’s disease. Neurosci Lett 1997;234:3-6
  11. Taddei K, Fisher C, Laws SM, et al. Association between presenilin-1 Glu318Gly mutation and familial Alzheimer’s disease in the Australian population. Mol Psychiatry 2002;7:776-781
  12. Albani D, Roiter I, Artuso V, et al. Presenilin-1 mutation E318G and familial Alzheimer’s disease in the Italian population. Neurobiol Aging 2007;28:1682-1688
  13. Mattila KM, Forsell C, Pirttilä T, et al. The Glu318Gly mutation of the presenilin-1 gene does not necessarily cause Alzheimer’s disease. Ann Neurol 1998;44:965-967