Unraveling the Complex Role of MAPT-Containing H1 and H2 Haplotypes in Neurodegenerative Diseases

The document reviews the complex role of the MAPT-containing H1 and H2 haplotypes within the 17q21.31 locus in neurodegenerative diseases. The H1 haplotype is a risk factor for several neurodegenerative diseases, including Alzheimer's and Parkinson's, while the H2 haplotype offers protection against these diseases but is linked to neurodevelopmental disorders like autism. The study highlights the challenges in identifying causal variants due to high linkage disequilibrium and emphasizes the importance of understanding these haplotypes for advancements in precision medicine and drug discovery. The research also underscores the need for ancestry-specific references and advanced human models to further investigate these haplotypes' effects.