@article {9580,
	title = {Association analysis of mitochondrial DNA heteroplasmic variants: methods and application.},
	journal = {medRxiv},
	year = {2024},
	month = {2024 Jan 13},
	abstract = {<p>We rigorously assessed a comprehensive association testing framework for heteroplasmy, employing both simulated and real-world data. This framework employed a variant allele fraction (VAF) threshold and harnessed multiple gene-based tests for robust identification and association testing of heteroplasmy. Our simulation studies demonstrated that gene-based tests maintained an appropriate type I error rate at α=0.001. Notably, when 5\% or more heteroplasmic variants within a target region were linked to an outcome, burden-extension tests (including the adaptive burden test, variable threshold burden test, and z-score weighting burden test) outperformed the sequence kernel association test (SKAT) and the original burden test. Applying this framework, we conducted association analyses on whole-blood derived heteroplasmy in 17,507 individuals of African and European ancestries (31\% of African Ancestry, mean age of 62, with 58\% women) with whole genome sequencing data. We performed both cohort- and ancestry-specific association analyses, followed by meta-analysis on bothpooled samples and within each ancestry group. Our results suggest that mtDNA-Enco ded genes/regions are likely to exhibit varying rates in somatic aging, with the notably strong associations observed between heteroplasmy in the  and  genes (  <0.001) and advance aging by the Original Burden test. In contrast, SKAT identified significant associations (  <0.001) between diabetes and the aggregated effects of heteroplasmy in several protein-coding genes. Further research is warranted to validate these findings. In summary, our proposed statistical framework represents a valuable tool for facilitating association testing of heteroplasmy with disease traits in large human populations.</p>},
	doi = {10.1101/2024.01.12.24301233},
	author = {Sun, Xianbang and Bulekova, Katia and Yang, Jian and Lai, Meng and Pitsillides, Achilleas N and Liu, Xue and Zhang, Yuankai and Guo, Xiuqing and Yong, Qian and Raffield, Laura M and Rotter, Jerome I and Rich, Stephen S and Abecasis, Goncalo and Carson, April P and Vasan, Ramachandran S and Bis, Joshua C and Psaty, Bruce M and Boerwinkle, Eric and Fitzpatrick, Annette L and Satizabal, Claudia L and Arking, Dan E and Ding, Jun and Levy, Daniel and Liu, Chunyu}
}
