Graziana Ceraolo, Giulia Spoto, Ambra Butera, Maria Spanò, Mirella Vinci, Girolamo Aurelio Vitello, Antonino Musumeci, Francesco Calì, Antonio Gennaro Nicotera, Gabriella Di Rosa
{"title":"New Insights Into TRMT10A Syndrome: Case Report and Literature Review.","authors":"Graziana Ceraolo, Giulia Spoto, Ambra Butera, Maria Spanò, Mirella Vinci, Girolamo Aurelio Vitello, Antonino Musumeci, Francesco Calì, Antonio Gennaro Nicotera, Gabriella Di Rosa","doi":"10.1002/ajmg.b.33015","DOIUrl":"https://doi.org/10.1002/ajmg.b.33015","url":null,"abstract":"<p><p>TRMT10A is related to a syndrome characterized by early-onset diabetes mellitus, microcephaly, epilepsy, and intellectual disability. We report a case of a patient showing spastic-ataxic paraparesis and Dandy-Walker variant associated with a causative homozygous c.421-1G > A variant in the TRMT10A gene, affecting a canonical splicing site. This mutation disrupts the \"SAM-dependent methyltransferase TRM10-type domain\", which is implicated in methylation and S-adenosylmethionine metabolic biological processes, crucial for mitochondrial and glucose metabolism. The prominent neurological involvement of our patient enhances the implication of TRMT10A in the brain development, suggesting a potential association between TRMT10A variants and dominant neurological phenotypes. This case expands the clinical spectrum of TRMT10A syndrome highlighting the importance of considering this gene in the evaluation of patients with brain/cerebellar malformations and spastic-ataxic paraparesis. Further research is warranted to elucidate the underlying pathogenic mechanisms and potential therapeutic implications.</p>","PeriodicalId":7673,"journal":{"name":"American Journal of Medical Genetics Part B: Neuropsychiatric Genetics","volume":" ","pages":"e33015"},"PeriodicalIF":1.6,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142493014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ugo Sorrentino, Elisa Baschiera, Maria Andrea Desbats, Orsetta Zuffardi, Leonardo Salviati, Matteo Cassina
{"title":"Characterization of Two Novel PNKP Splice-Site Variants in a Proband With Microcephaly, Intellectual Disability, and Multiple Malformations.","authors":"Ugo Sorrentino, Elisa Baschiera, Maria Andrea Desbats, Orsetta Zuffardi, Leonardo Salviati, Matteo Cassina","doi":"10.1002/ajmg.b.33013","DOIUrl":"https://doi.org/10.1002/ajmg.b.33013","url":null,"abstract":"<p><p>Polynucleotide kinase phosphatase (PNKP), encoded by the PNKP gene, is a DNA processing enzyme involved in double-strand break and single-strand break repair pathways, which are essential for genome stability and for the correct development and maintenance of human nervous system. PNKP biallelic loss-of-function variants have been associated with a broad spectrum of neurological anomalies, ranging from congenital microcephaly with intellectual disability and seizures (MCSZ), to later onset forms of ataxia-oculomotor apraxia (AOA4) or peripheral neuropathy (CMT2B2). We report the atypical clinical manifestations of a patient with severe microcephaly, short stature, developmental delay, conductive hearing loss, and tracheoesophageal malformation, in the absence of seizures. Whole exome sequencing analysis identified two novel, compound heterozygous splice-site variants in the PNKP gene (NM_007254.4): c.1448+1G > A and c.199-8_199-5del. To demonstrate the effect of both variants on the splicing process and prove their pathogenicity, we performed a hybrid minigene assay, which successfully highlighted a deleterious impact on the transcript, particularly regarding the c.199-8_199-5del variant. The uncommon clinical features of the proband and the identification of two newly associated pathogenic variants add further evidence to the allelic and phenotypic heterogeneity of the PNKP locus.</p>","PeriodicalId":7673,"journal":{"name":"American Journal of Medical Genetics Part B: Neuropsychiatric Genetics","volume":" ","pages":"e33013"},"PeriodicalIF":1.6,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142455984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Chuyue Wu, Qinji Zhou, Yu Huang, Fei Yan, Zhenjie Yang, Lei He, Qian Li, Li Li
{"title":"Genetic Variants ε2 and ε4 of APOE Predict Mortality and Poor Outcome Independently in Spontaneous Intracerebral Hemorrhage Within the Chinese Han Population.","authors":"Chuyue Wu, Qinji Zhou, Yu Huang, Fei Yan, Zhenjie Yang, Lei He, Qian Li, Li Li","doi":"10.1002/ajmg.b.33010","DOIUrl":"https://doi.org/10.1002/ajmg.b.33010","url":null,"abstract":"<p><p>The heightened mortality and disability rates, coupled with restricted neurological recovery post intracerebral hemorrhage (ICH), have sparked considerable attention toward its treatment and results. Simultaneously, the influence of the APOE gene on ICH prognosis has been well-documented. This research aimed to explore the relationship between specific APOE alleles in the present cohort and the incidences of mortality, recurrence, and adverse prognosis, as determined by neurological function assessments in ICH patients. Data on patients diagnosed with ICH and hospitalized in the Department of Neurology at our institution from October 2021 to March 2022 were collected, including determining their APOE genotypes. A 1-year follow-up was conducted to evaluate mortality, ICH recurrence, and modified Rankin Scale (mRS) scores at 3 and 12 months. Poor prognosis was defined as an mRS score of ≥ 3. Initially, we analyzed the relationships between different APOE alleles and mortality, recurrence, and poor prognosis. Subsequently, we explored additional factors influencing each prognostic outcome and conducted multivariate analysis to identify independent risk factors. An analysis was conducted on 289 patients diagnosed with ICH. The presence of the ε2 allele was found to be a significant independent predictor for unfavorable outcomes at both 3 months (p = 0.022, OR = 2.138, 95% CI [2.041, 3.470]) and 1 year (p = 0.020, OR = 5.116, 95% CI [5.044, 5.307]). Moreover, the ε4 allele was established as an independent risk factor for ICH recurrence within 1 year (p = 0.025, OR = 2.326, 95% CI [1.163, 2.652]), as well as for mortality at 3 months (p = 0.037, OR = 4.250, 95% CI [4.068, 4.920]) and 1 year (p = 0.023, OR = 4.109, 95% CI [4.016, 4.739]). In conclusions, Both APOE ε2 and ε4 variants independently heighten mortality risk, recurrence, and poor prognosis after ICH. The substantial influence underscores the need for additional investigation into the impact of APOE genotype on ICH prognosis.</p>","PeriodicalId":7673,"journal":{"name":"American Journal of Medical Genetics Part B: Neuropsychiatric Genetics","volume":" ","pages":"e33010"},"PeriodicalIF":1.6,"publicationDate":"2024-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142379924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Causal Relationship Between Autism Spectrum Disorder and Inflammatory Bowel Disease: A Bidirectional Mendelian Randomization Study.","authors":"Weilin Li, Xiaoyu He, Chao Tan, Tao Zhang","doi":"10.1002/ajmg.b.33012","DOIUrl":"https://doi.org/10.1002/ajmg.b.33012","url":null,"abstract":"<p><p>Patients with autism spectrum disorder (ASD) are often accompanied by inflammatory bowel disease (IBD) in observational research; however, the potential causal link between the two conditions remains unknown. In this study, we used a two-sample bidirectional Mendelian randomization (MR) approach to assess the causal relationship between ASD and IBD and its main subtypes, Crohn's disease (CD), and ulcerative colitis (UC). Independent genetic instruments from a genome-wide association study (GWAS) for IBD (25,042 cases and 34,915 controls) were used to investigate the association of IBD with ASD data obtained from the PGC and the iPSYCH consortia (N = 46,351). The primary analysis employed the random effects inverse variance weighting (IVW) method. Horizontal pleiotropy was detected using the MR Egger regression and the MR-pleiotropy residual sum and outlier (MR-PRESSO) analysis while heterogeneity was detected using Cochran's Q. The IVW method indicated a positive causal relationship of IBD with ASD (odds ratio (OR) = 1.028, 95% confidence interval (CI) = 1.001-1.056, p = 0.042). In subtype analyses, CD was positively related to ASD (OR = 1.036; 95% CI = 1.004-1.069; p = 0.02); however, UC showed no relationship (OR = 1.021; 95% CI = 0.999-1.044; p = 0.065). In contrast, no evidence of a causal relationship between ASD and IBD or its subtypes (p > 0.05) was found. Our findings provided evidence in support of potential causal associations between IBD/CD and ASD.</p>","PeriodicalId":7673,"journal":{"name":"American Journal of Medical Genetics Part B: Neuropsychiatric Genetics","volume":" ","pages":"e33012"},"PeriodicalIF":1.6,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142339430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Marc A Khoury, Mila Valcic, Nathan W Churchill, Alex Di Battista, Vincenzo De Luca, Luis R Fornazzari, David G Munoz, Corinne E Fischer, Tom A Schweizer
{"title":"Sex Differences in Cortical Thickness and Neuropsychiatric Symptom Burden Based on APOE4 Homozygosity in Alzheimer's Disease.","authors":"Marc A Khoury, Mila Valcic, Nathan W Churchill, Alex Di Battista, Vincenzo De Luca, Luis R Fornazzari, David G Munoz, Corinne E Fischer, Tom A Schweizer","doi":"10.1002/ajmg.b.33008","DOIUrl":"https://doi.org/10.1002/ajmg.b.33008","url":null,"abstract":"<p><p>Sex differences in patterns of cortical thickness and neuropsychiatric symptom (NPS) burden were examined among individuals with Alzheimer's disease (AD) and two copies (homozygote carriers) of the e4 allele of the apolipoprotein gene (APOE). A total of 752 participants with a clinical etiologic diagnosis of AD were selected from the National Alzheimer's Coordinating Center (NACC) database. Bayesian multilevel regression was used to examine both the within- and between-sex differences in gray-matter cortical thickness and total NPS burden associated with APOE homozygosity. Female homozygote carriers displayed a high probability of having reduced cortical thickness primarily in medial-lateral temporal regions and a greater burden of NPS, relative to both non-homozygous females and homozygous males. These findings support the notion that APOE4 status affects cortical thickness and symptom burden in men and women with AD differentially, with females showing more pronounced effects in brain areas known to be vulnerable in early AD. Future investigations should attempt to elucidate the proposed pattern of decline longitudinally.</p>","PeriodicalId":7673,"journal":{"name":"American Journal of Medical Genetics Part B: Neuropsychiatric Genetics","volume":" ","pages":"e33008"},"PeriodicalIF":1.6,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142339434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lucrezia Perri, Germana Viscogliosi, Valentina Trevisan, Claudia Brogna, Daniela Pia Rosaria Chieffo, Ilaria Contaldo, Paolo Alfieri, Nicolo' Lentini, Roberta Pastorino, Giuseppe Zampino, Chiara Leoni
{"title":"Parenting Stress Index in Caregivers of Individuals With Noonan Syndrome.","authors":"Lucrezia Perri, Germana Viscogliosi, Valentina Trevisan, Claudia Brogna, Daniela Pia Rosaria Chieffo, Ilaria Contaldo, Paolo Alfieri, Nicolo' Lentini, Roberta Pastorino, Giuseppe Zampino, Chiara Leoni","doi":"10.1002/ajmg.b.33009","DOIUrl":"https://doi.org/10.1002/ajmg.b.33009","url":null,"abstract":"<p><p>Medical professionals frequently underestimate stress level of parents/caregivers of patients with rare disorders as RASopathies, the latter might experience elevated stress levels, with their own health frequently overlooked despite significant responsibilities and hurdles encountered. The aim of this study is to assess the stress experienced by parents of individuals with Noonan syndrome and related conditions. Forty-eight parents (20 fathers; 28 mothers), among the 31 recruited families, completed the Italian version of the Parenting Stress Index-Short Form. Our study shows abnormally elevated scores (≥ 85° percentile) in 35.4% of parents. Data retrieved from subscales reveal a perception of a difficult child in 25% of cases, a dysfunctional parental-child interaction in 20.8%, a general parental distress in 10.4% of cases, and an elevated overall stress in 18.8% of parents. Questionnaires as the Parenting Stress Index-Short Form are valuable tools to evaluate stress in parents/caregivers of children with RASopathies. Evaluation by professionals is fundamental to support parents and caregivers in managing stressors and to enhance their quality of life and relationships. To prevent stress escalation and parents' burnout, an early assessment to tailor a timely treatment should be introduced as soon as possible as good clinical practice.</p>","PeriodicalId":7673,"journal":{"name":"American Journal of Medical Genetics Part B: Neuropsychiatric Genetics","volume":" ","pages":"e33009"},"PeriodicalIF":1.6,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142339433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Cognitive, Social, and Emotional-Behavioral Outcomes in Children and Adolescents With Beckwith-Wiedemann Syndrome.","authors":"Niccolò Butti, Cosimo Urgesi, Alessandro Mussa, Rosario Montirosso","doi":"10.1002/ajmg.b.33006","DOIUrl":"https://doi.org/10.1002/ajmg.b.33006","url":null,"abstract":"<p><p>Although Beckwith-Wiedemann syndrome spectrum (BWSp) is not usually associated with intellectual disability, recent evidences calls for further investigation of cognitive development and academic skills in children with BWSp. Moreover, research has documented social difficulties and emotional-behavioral problems associated with BWSp. Nevertheless, a full characterization of socio-emotional development in BWSp is still lacking. In the current study, cognitive and socio-emotional development was assessed in 29 children with BWSp aged 5-18 years, using a test of nonverbal intelligence, a neuropsychological battery covering multiple domains, academic skills tests, and questionnaires evaluating autistic traits and emotional-behavioral problems. As expected, most participants showed adequate performance in cognitive tests. However, the findings also highlighted greater difficulties in language than visuospatial processing, strengths in social perception, as well as slowness in reading and mental calculation. The assessment of emotional-behavioral difficulties indicated a prevalent phenotype characterized by increased anxiety, low self-esteem, social withdrawal and a tendency to control externalizing reactions, but no associations with autistic traits, cognitive outcomes, and the clinical score proposed by the recent Consensus statement. Increased social perception and internalization problems likely result from coping strategies with social and care-related stress. Overall, the findings of this study inform clinical management and genetic counseling for children and adolescents with BWSp.</p>","PeriodicalId":7673,"journal":{"name":"American Journal of Medical Genetics Part B: Neuropsychiatric Genetics","volume":" ","pages":"e33006"},"PeriodicalIF":1.6,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142339432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Haiyan Tang, Shanshan Chen, Liu Yi, Sheng Xu, Huihui Yang, Zongchang Li, Ying He, Yanhui Liao, Xiaogang Chen, Chunyu Liu, Lin Gu, Ning Yuan, Chao Chen, Jinsong Tang
{"title":"Circadian Rhythms Correlated in DNA Methylation and Gene Expression Identified in Human Blood and Implicated in Psychiatric Disorders","authors":"Haiyan Tang, Shanshan Chen, Liu Yi, Sheng Xu, Huihui Yang, Zongchang Li, Ying He, Yanhui Liao, Xiaogang Chen, Chunyu Liu, Lin Gu, Ning Yuan, Chao Chen, Jinsong Tang","doi":"10.1002/ajmg.b.33005","DOIUrl":"10.1002/ajmg.b.33005","url":null,"abstract":"<div>\u0000 \u0000 <p>Circadian rhythms modulate the biology of many human tissues and are driven by a nearly 24-h transcriptional feedback loop. Dynamic DNA methylation may play a role in driving 24-h rhythms of gene expression in the human brain. However, little is known about the degree of circadian regulation between the DNA methylation and the gene expression in the peripheral tissues, including human blood. We hypothesized that 24-h rhythms of DNA methylation play a role in driving 24-h RNA expression in human blood. To test this hypothesis, we analyzed DNA methylation levels and RNA expression in blood samples collected from eight healthy males at six-time points over 24 h. We assessed 442,703 genome-wide CpG sites in methylation and 12,364 genes in expression for 24-h rhythmicity using the cosine model. Our analysis revealed significant rhythmic patterns in 6345 CpG sites and 21 genes. Next, we investigated the relationship between methylation and expression using powerful circadian signals. We found a modest negative correlation (<i>ρ</i> = −0.83, <i>p</i> = 0.06) between the expression of gene <i>TXNDC5</i> and the methylation at the nearby CpG site (cg19116172). We also observed that circadian CpGs significantly overlapped with genetic risk loci of schizophrenia and autism spectrum disorders. Notably, one gene, <i>TXNDC5,</i> showed a significant correlation between circadian methylation and expression and has been reported to be association with neuropsychiatric diseases.</p>\u0000 </div>","PeriodicalId":7673,"journal":{"name":"American Journal of Medical Genetics Part B: Neuropsychiatric Genetics","volume":"198 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142339431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yu-Cheng Hsu, Mei-Hsin Su, Chia-Yen Chen, Yen-Feng Lin, Shi-Heng Wang
{"title":"Associations of Polygenic Risk for Depression, Traditional Chinese Medicine Constitution, and Depression: A Population-Based Study in Taiwan","authors":"Yu-Cheng Hsu, Mei-Hsin Su, Chia-Yen Chen, Yen-Feng Lin, Shi-Heng Wang","doi":"10.1002/ajmg.b.33007","DOIUrl":"10.1002/ajmg.b.33007","url":null,"abstract":"<div>\u0000 \u0000 <p>To comprehensively investigate the risk factors associated with depression, traditional Chinese medicine constitution (TCMC) has been found to be related to depression. However, the underlying mechanism remains unclear. This study examined the association between the concept of unbalanced TCMCs and major depressive disorder (MDD), investigated the overlapping polygenic risks between unbalanced TCMC and MDD, and performed a mediation test to establish potential pathways. In total, 11,030 individuals were recruited from the Taiwan Biobank, and the polygenic risk score (PRS) for MDD for each participant was calculated using the data from the Psychiatric Genomics Consortium. Unbalanced TCMC were classified as yang-deficiency, yin-deficiency, and stasis. The MDD PRS was associated with yang-deficiency odds ratio [OR] per standard deviation increase in standardized (PRS = 1.07, <i>p</i> = 0.0080), yin-deficiency (OR = 1.07, <i>p</i> = 0.0030), and stasis constitution (OR = 1.06, <i>p</i> = 0.0331). Yang-deficiency (OR = 2.07, <i>p</i> < 0.0001) and stasis constitutions (OR = 1.65, <i>p</i> = 0.0015) were associated with an increased risk of MDD. A higher number of unbalanced constitutions was associated with MDD (<i>p</i> < 0.0001). The effect of MDD PRS on MDD was partly mediated by yang-deficiency (10.21%) and stasis (8.41%) constitutions. This study provides evidence for the shared polygenic risk mechanism underlying depression and TCMC and the potential mediating role of TCMC in the polygenic liability for MDD.</p>\u0000 </div>","PeriodicalId":7673,"journal":{"name":"American Journal of Medical Genetics Part B: Neuropsychiatric Genetics","volume":"198 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142217419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shu-Ju Lin, Nathan A. Gillespie, Randy Notestine, Anthony C. Gamst, Anna M. Chen, Linda K. McEvoy, Matthew S. Panizzon, Jeremy A. Elman, Stephen J. Glatt, Donald J. Hagler Jr, Michael C. Neale, Carol E. Franz, William S. Kremen, Christine Fennema-Notestine
{"title":"The genetic and environmental etiology of novel frequency-driven regional parcellations of abnormal white matter","authors":"Shu-Ju Lin, Nathan A. Gillespie, Randy Notestine, Anthony C. Gamst, Anna M. Chen, Linda K. McEvoy, Matthew S. Panizzon, Jeremy A. Elman, Stephen J. Glatt, Donald J. Hagler Jr, Michael C. Neale, Carol E. Franz, William S. Kremen, Christine Fennema-Notestine","doi":"10.1002/ajmg.b.33004","DOIUrl":"10.1002/ajmg.b.33004","url":null,"abstract":"<p>The prevalence of white matter disease increases with age and is associated with cerebrovascular disease, cognitive decline, and risk for dementia. MRI measures of abnormal signal in the white matter (AWM) provide estimates of damage, however, regional patterns of AWM may be differentially influenced by genetic or environmental factors. With our data-driven regional parcellation approach, we created a probability distribution atlas using Vietnam Era Twin Study of Aging (VETSA) data (<i>n</i> = 475, mean age 67.6 years) and applied a watershed algorithm to define separate regional parcellations. We report biometrical twin modeling for five anatomically distinct regions: (1) Posterior, (2) Superior frontal and parietal, (3) Anterior and inferior frontal with deep areas, (4) Occipital, and (5) Anterior periventricular. We tested competing multivariate hypotheses to identify unique influences and to explain sources of covariance among the parcellations. Family aggregation could be entirely explained by additive genetic influences, with additive genetic variance (heritability) ranging from 0.69 to 0.79. Most genetic correlations between parcellations ranged from moderate to high (<i>r</i><sub>g</sub> = 0.57–0.85), although two were small (<i>r</i><sub>g</sub> = 0.35–0.39), consistent with varying degrees of unique genetic influences. This proof-of-principle investigation demonstrated the value of our novel, data-driven parcellations, with identifiable genetic and environmental differences, for future exploration.</p>","PeriodicalId":7673,"journal":{"name":"American Journal of Medical Genetics Part B: Neuropsychiatric Genetics","volume":"198 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141987287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}