Ningping Feng, Ajeet Mandal, Ananya Jambhale, Pranav Narnur, Gang Chen, Nirmala Akula, Robin Kramer, Bhaskar Kolachana, Qing Xu, Francis J McMahon, Barbara K Lipska, Pavan K Auluck, Stefano Marenco
{"title":"Schizophrenia risk-associated SNPs affect expression of microRNA 137 host gene: a postmortem study.","authors":"Ningping Feng, Ajeet Mandal, Ananya Jambhale, Pranav Narnur, Gang Chen, Nirmala Akula, Robin Kramer, Bhaskar Kolachana, Qing Xu, Francis J McMahon, Barbara K Lipska, Pavan K Auluck, Stefano Marenco","doi":"10.1093/hmg/ddae130","DOIUrl":"10.1093/hmg/ddae130","url":null,"abstract":"<p><p>Common variants in the MicroRNA 137 host gene MIR137HG and its adjacent gene DPYD have been associated with schizophrenia risk and the latest Psychiatric Genomics Consortium (PGC). Genome-Wide Association Study on schizophrenia has confirmed and extended these findings. To elucidate the association of schizophrenia risk-associated SNPs in this genomic region, we examined the expression of both mature and immature transcripts of the miR-137 host gene (MIR137HG) in the dorsolateral prefrontal cortex (DLPFC) and subgenual anterior cingulate cortex (sgACC) of postmortem brain samples of donors with schizophrenia and psychiatrically-unaffected controls using qPCR and RNA-Seq approaches. No differential expression of miR-137, MIR137HG, or its transcripts was observed. Two schizophrenia risk-associated SNPs identified in the PGC study, rs11165917 (DLPFC: P = 2.0e-16; sgACC: P = 6.4e-10) and rs4274102 (DLPFC: P = 0.036; sgACC: P = 0.002), were associated with expression of the MIR137HG long non-coding RNA transcript MIR137HG-203 (ENST00000602672.2) in individuals of European ancestry. Carriers of the minor (risk) allele of rs11165917 had significantly lower expression of MIR137HG-203 compared with those carrying the major allele. However, we were unable to validate this result by short-read sequencing of RNA extracted from DLPFC or sgACC tissue. This finding suggests that immature transcripts of MIR137HG may contribute to genetic risk for schizophrenia.</p>","PeriodicalId":13070,"journal":{"name":"Human molecular genetics","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142139905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The rs6576457 G > A variant in the MKRN3 gene promoter significantly increases the risk of central precocious puberty and lung cancer in Hubei Chinese population.","authors":"Feng Wu, Weiguang Zhou, Zhengchu Yue, Xiangyuan Deng, Wenqiang Kang, Zhiyan Yu, Haixia Zhang, Bixin Zhang, Xianhong Feng, Qiantao Xiong, Bifeng Chen","doi":"10.1093/hmg/ddae131","DOIUrl":"10.1093/hmg/ddae131","url":null,"abstract":"<p><p>Makorin RING finger protein 3 (MKRN3) is a key inhibitor of the hypothalamic-pituitary-gonadal (HPG) axis. The association between MKRN3 gene variants and central precocious puberty (CPP) has been repeatedly examined. In a recent study, MKRN3 has been assigned a role of tumor suppressor in lung carcinogenesis. Therefore, it is hypothesized that MKRN3 may be the link between CPP and lung cancer (LC), and certain MKRN3 gene variants may affect individuals' susceptibility to CPP and LC. The rs12441287, rs6576457 and rs2239669 in the MKRN3 gene were selected as the target variants. Sanger sequencing was applied to genotype them in two sets of case-control cohorts, namely 384 CPP girls and 422 healthy girls, 550 LC patients and 800 healthy controls. The results showed that rs6576457 but not rs12441287 or rs2239669 was significantly associated with the risk of CPP and LC. Their association with CPP risk was further confirmed in the following meta-analysis. Subsequent functional assays revealed that the rs6576457 genotypes were correlated with differentially expressed MKRN3, and the rs6576457 alleles affected the transcription repressor Oct-1 binding affinity to the MKRN3 promoter. Collectively, the MKRN3 gene rs6576457 may participate in the CPP pathology and LC tumorigenesis in the Hubei Chinese population. However, the present findings should be validated in additional investigations with larger samples from different ethnic populations.</p>","PeriodicalId":13070,"journal":{"name":"Human molecular genetics","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142139906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jorge Martinez-Laso, Isabel Cervera, Marina S Martinez-Carrasco, Veronica Briz, Celia Crespo-Bermejo, Clara Sánchez-Menéndez, Guiomar Casado-Fernández, Montserrat Torres, Mayte Coiras
{"title":"Characterisation of LGP2 complex multitranscript system in humans: role in the innate immune response and evolution from non-human primates.","authors":"Jorge Martinez-Laso, Isabel Cervera, Marina S Martinez-Carrasco, Veronica Briz, Celia Crespo-Bermejo, Clara Sánchez-Menéndez, Guiomar Casado-Fernández, Montserrat Torres, Mayte Coiras","doi":"10.1093/hmg/ddae155","DOIUrl":"https://doi.org/10.1093/hmg/ddae155","url":null,"abstract":"<p><p>Retinoic acid inducible gene I (RIG-I)-like receptors (RLRs), including RIG-I, MDA5 and LGP2, recognize viral RNA to mount an antiviral interferon (IFN) response RLRs share three different protein domains: C-terminal domain, DExD/H box RNA helicase domain, and an N-terminal domain with two tandem repeats (CARDs). LGP2 lacks tandem CARD and is not able to induce an IFN response. However, LGP2 positively enhances MDA5 and negatively regulates RIG-I signaling. In this study, we determined the LGP2 alternative transcripts in humans to further comprehend the mechanism of its regulation, their evolutionary origin, and the isoforms functionallity. The results showed new eight alternative transcripts in the samples tested. The presence of these transcripts demonstrated that the main mechanisms for the regulation of LGP2 expression are both by insertion of introns and by the loss of exons. The phylogenetic analysis of the comparison between sequences from exon 1 to exon 3 of humans and those previously described in non-human primates showed three well-differentiated groups (lineages) originating from gorillas, suggesting that the transspecies evolution has been maintained for 10 million years. The corresponding protein models (isoforms) were also established, obtaining four isoforms: one complete and three others lacking the C-terminal domain or this domain and the partial or total He2 Helicase domain, which would compromise the functionality of LGP2. In conclusion, this is the first study that elucidate the large genomic organization and complex transcriptional regulation of human LGP2, its pattern of sequence generation, and a mode of evolutionary inheritance across species.</p>","PeriodicalId":13070,"journal":{"name":"Human molecular genetics","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142590571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hong Liu, Lucia Chehade, Marc-Olivier Deguise, Yves De Repentigny, Rashmi Kothary
{"title":"SMN depletion impairs skeletal muscle formation and maturation in a mouse model of SMA.","authors":"Hong Liu, Lucia Chehade, Marc-Olivier Deguise, Yves De Repentigny, Rashmi Kothary","doi":"10.1093/hmg/ddae162","DOIUrl":"https://doi.org/10.1093/hmg/ddae162","url":null,"abstract":"<p><p>Spinal muscular atrophy (SMA) is characterized by low levels of the ubiquitously expressed Survival Motor Neuron (SMN) protein, leading to progressive muscle weakness and atrophy. Skeletal muscle satellite cells play a crucial role in muscle fiber maintenance, repair, and remodelling. While the effects of SMN depletion in muscle are well documented, its precise role in satellite cell function remains largely unclear. Using the Smn2B/- mouse model, we investigated SMN-depleted satellite cell biology through single fiber culture studies. Myofibers from Smn2B/- mice were smaller in size, shorter in length, had reduced myonuclear domain size, and reduced sub-synaptic myonuclear clusters-all suggesting impaired muscle function and integrity. These changes were accompanied by a reduction in the number of myonuclei in myofibers from Smn2B/- mice across all disease stages examined. Although the number of satellite cells in myofibers was significantly reduced, those remaining retained their capacity for myogenic activation and proliferation. These findings support the idea that a dysregulated myogenic process could be occurring as early in muscle stem cells during muscle formation and maturation in SMA. Targeting those pathways could offer additional options for combinatorial therapies for SMA.</p>","PeriodicalId":13070,"journal":{"name":"Human molecular genetics","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142590578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Samantha Martin, Riku Katainen, Aurora Taira, Niko Välimäki, Ari Ristimäki, Toni Seppälä, Laura Renkonen-Sinisalo, Anna Lepistö, Kyösti Tahkola, Anne Mattila, Selja Koskensalo, Jukka-Pekka Mecklin, Kristiina Rajamäki, Kimmo Palin, Lauri A Aaltonen
{"title":"Lynch syndrome-associated and sporadic microsatellite unstable colorectal cancers: different patterns of clonal evolution yield highly similar tumours.","authors":"Samantha Martin, Riku Katainen, Aurora Taira, Niko Välimäki, Ari Ristimäki, Toni Seppälä, Laura Renkonen-Sinisalo, Anna Lepistö, Kyösti Tahkola, Anne Mattila, Selja Koskensalo, Jukka-Pekka Mecklin, Kristiina Rajamäki, Kimmo Palin, Lauri A Aaltonen","doi":"10.1093/hmg/ddae124","DOIUrl":"10.1093/hmg/ddae124","url":null,"abstract":"<p><p>Microsatellite unstable colorectal cancer (MSI-CRC) can arise through germline mutations in mismatch repair (MMR) genes in individuals with Lynch syndrome (LS), or sporadically through promoter methylation of the MMR gene MLH1. Despite the different origins of hereditary and sporadic MSI tumours, their genomic features have not been extensively compared. A prominent feature of MMR-deficient genomes is the occurrence of many indels in short repeat sequences, an understudied mutation type due to the technical challenges of variant calling in these regions. In this study, we performed whole genome sequencing and RNA-sequencing on 29 sporadic and 14 hereditary MSI-CRCs. We compared the tumour groups by analysing genome-wide mutation densities, microsatellite repeat indels, recurrent protein-coding variants, signatures of single base, doublet base, and indel mutations, and changes in gene expression. We show that the mutational landscapes of hereditary and sporadic MSI-CRCs, including mutational signatures and mutation densities genome-wide and in microsatellites, are highly similar. Only a low number of differentially expressed genes were found, enriched to interferon-γ regulated immune response pathways. Analysis of the variance in allelic fractions of somatic variants in each tumour group revealed higher clonal heterogeneity in sporadic MSI-CRCs. Our results suggest that the differing molecular origins of MMR deficiency in hereditary and sporadic MSI-CRCs do not result in substantial differences in the mutational landscapes of these tumours. The divergent patterns of clonal evolution between the tumour groups may have clinical implications, as high clonal heterogeneity has been associated with decreased tumour immunosurveillance and reduced responsiveness to immunotherapy.</p>","PeriodicalId":13070,"journal":{"name":"Human molecular genetics","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11540923/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142046619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ladan Kalani, Bo-Hyun Kim, Alberto Ruiz de Chavez, Anastasia Roemer, Anna Mikhailov, Jonathan K Merritt, Katrina V Good, Robert L Chow, Kerry R Delaney, Michael J Hendzel, Zhaolan Zhou, Jeffrey L Neul, John B Vincent, Juan Ausió
{"title":"Testing the PEST hypothesis using relevant Rett mutations in MeCP2 E1 and E2 isoforms.","authors":"Ladan Kalani, Bo-Hyun Kim, Alberto Ruiz de Chavez, Anastasia Roemer, Anna Mikhailov, Jonathan K Merritt, Katrina V Good, Robert L Chow, Kerry R Delaney, Michael J Hendzel, Zhaolan Zhou, Jeffrey L Neul, John B Vincent, Juan Ausió","doi":"10.1093/hmg/ddae119","DOIUrl":"10.1093/hmg/ddae119","url":null,"abstract":"<p><p>Mutations in methyl-CpG binding protein 2 (MeCP2), such as the T158M, P152R, R294X, and R306C mutations, are responsible for most Rett syndrome (RTT) cases. These mutations often result in altered protein expression that appears to correlate with changes in the nuclear size; however, the molecular details of these observations are poorly understood. Using a C2C12 cellular system expressing human MeCP2-E1 isoform as well as mouse models expressing these mutations, we show that T158M and P152R result in a decrease in MeCP2 protein, whereas R306C has a milder variation, and R294X resulted in an overall 2.5 to 3 fold increase. We also explored the potential involvement of the MeCP2 PEST domains in the proteasome-mediated regulation of MeCP2. Finally, we used the R294X mutant to gain further insight into the controversial competition between MeCP2 and histone H1 in the chromatin context. Interestingly, in R294X, MeCP2 E1 and E2 isoforms were differently affected, where the E1 isoform contributes to much of the overall protein increase observed, while E2 decreases by half. The modes of MeCP2 regulation, thus, appear to be differently regulated in the two isoforms.</p>","PeriodicalId":13070,"journal":{"name":"Human molecular genetics","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11540922/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141975542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hari Prasad, Idrees A Shah, Reuben Thomas Kurien, Sudipta Dhar Chowdhury, Sandhya S Visweswariah
{"title":"An integrated picture of chronic pancreatitis derived by mapping variants in multiple disease genes onto pathogenic pathways.","authors":"Hari Prasad, Idrees A Shah, Reuben Thomas Kurien, Sudipta Dhar Chowdhury, Sandhya S Visweswariah","doi":"10.1093/hmg/ddae127","DOIUrl":"10.1093/hmg/ddae127","url":null,"abstract":"<p><p>Chronic pancreatitis (CP) is an etiologically and genetically heterogeneous inflammatory syndrome characterised by progressive damage to the exocrine and endocrine components of the pancreas [ 1]. The multigenic paradigm of CP has sparked research in recent years [ 2]. We aimed to expand the current knowledge of genetic susceptibility of pancreatitis in patients of Indian origin. By employing whole-exome sequencing in an Indian hospital cohort, we dissect the genetic landscape associated with CP or recurrent acute pancreatitis (RAP). Notably, all patients had at least one genetic variant identified in a pancreatitis-risk gene, and most had a co-occurrence of a second variant in an additional risk gene. Based on the presence of both acinar and ductal gene variants in individual patients, we propose a two-hit hypothesis where variants in proteins expressed in both acinar and ductal cells are critical for RAP/CP development.</p>","PeriodicalId":13070,"journal":{"name":"Human molecular genetics","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142092816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"NEK1 haploinsufficiency worsens DNA damage, but not defective ciliogenesis, in C9ORF72 patient-derived iPSC-motoneurons.","authors":"Serena Santangelo, Sabrina Invernizzi, Marta Nice Sorce, Valeria Casiraghi, Silvia Peverelli, Alberto Brusati, Claudia Colombrita, Nicola Ticozzi, Vincenzo Silani, Patrizia Bossolasco, Antonia Ratti","doi":"10.1093/hmg/ddae121","DOIUrl":"10.1093/hmg/ddae121","url":null,"abstract":"<p><p>The hexanucleotide G4C2 repeat expansion (HRE) in C9ORF72 gene is the major cause of amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD), leading to both loss- and gain-of-function pathomechanisms. The wide clinical heterogeneity among C9ORF72 patients suggests potential modifying genetic and epigenetic factors. Notably, C9ORF72 HRE often co-occurs with other rare variants in ALS/FTD-associated genes, such as NEK1, which encodes for a kinase involved in multiple cell pathways, including DNA damage response and ciliogenesis. In this study, we generated induced pluripotent stem cells (iPSCs) and differentiated motoneurons (iPSC-MNs) from an ALS patient carrying both C9ORF72 HRE and a NEK1 loss-of-function mutation to investigate the biological effect of NEK1 haploinsufficiency on C9ORF72 pathology in a condition of oligogenicity. Double mutant C9ORF72/NEK1 cells showed increased pathological C9ORF72 RNA foci in iPSCs and higher DNA damage levels in iPSC-MNs compared to single mutant C9ORF72 cells, but no effect on DNA damage response. When we analysed the primary cilium, we observed a defective ciliogenesis in C9ORF72 iPSC-MNs which was not worsened by NEK1 haploinsufficiency in the double mutant iPSC-MNs. Altogether, our study shows that NEK1 haploinsufficiency influences differently DNA damage and cilia length, potentially acting as a modifier at biological level in an in vitro ALS patient-derived disease model of C9ORF72 pathology.</p>","PeriodicalId":13070,"journal":{"name":"Human molecular genetics","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11540924/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142106928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jiss M Louis, Jesus A Frias, Jacob H Schroader, Lindsey A Jones, Emily E Davey, Claudia D Lennon, Jacob Chacko, John D Cleary, J Andrew Berglund, Kaalak Reddy
{"title":"Expression levels of core spliceosomal proteins modulate the MBNL-mediated spliceopathy in DM1.","authors":"Jiss M Louis, Jesus A Frias, Jacob H Schroader, Lindsey A Jones, Emily E Davey, Claudia D Lennon, Jacob Chacko, John D Cleary, J Andrew Berglund, Kaalak Reddy","doi":"10.1093/hmg/ddae125","DOIUrl":"10.1093/hmg/ddae125","url":null,"abstract":"<p><p>Myotonic dystrophy type 1 (DM1) is a heterogeneous multisystemic disease caused by a CTG repeat expansion in DMPK. Transcription of the expanded allele produces toxic CUG repeat RNA that sequesters the MBNL family of alternative splicing (AS) regulators into ribonuclear foci, leading to pathogenic mis-splicing. To identify genetic modifiers of toxic CUG RNA levels and the spliceopathy, we performed a genome-scale siRNA screen using an established HeLa DM1 repeat-selective screening platform. We unexpectedly identified core spliceosomal proteins as a new class of modifiers that rescue the spliceopathy in DM1. Modest knockdown of one of our top hits, SNRPD2, in DM1 fibroblasts and myoblasts, significantly reduces DMPK expression and partially rescues MBNL-regulated AS dysfunction. While the focus on the DM1 spliceopathy has centered around the MBNL proteins, our work reveals an unappreciated role for MBNL:spliceosomal protein stoichiometry in modulating the spliceopathy, revealing new biological and therapeutic avenues for DM1.</p>","PeriodicalId":13070,"journal":{"name":"Human molecular genetics","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11540926/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142046618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lena Sagi-Dain, Michal Levy, Reut Matar, Sarit Kahana, Ifaat Agmon-Fishman, Cochava Klein, Merav Gurevitch, Lina Basel-Salmon, Idit Maya
{"title":"Exploring the human genomic landscape: patterns of common homozygosity regions in a large middle eastern cohort.","authors":"Lena Sagi-Dain, Michal Levy, Reut Matar, Sarit Kahana, Ifaat Agmon-Fishman, Cochava Klein, Merav Gurevitch, Lina Basel-Salmon, Idit Maya","doi":"10.1093/hmg/ddae123","DOIUrl":"10.1093/hmg/ddae123","url":null,"abstract":"<p><p>Regions of Homozygosity (ROH) typically reflect normal demographic history of a human population, but may also relate to cryptic consanguinity, and, additionally, have been associated with specific medical conditions. The objective of this study was to investigate the location, size, and prevalence of common ROH segments in a Middle Eastern cohort. This retrospective study included 13 483 samples collected from all Chromosomal Microarray analyses (CMA) performed using Single Nucleotide Polymorphism (SNP) arrays at the genetic clinical laboratory of Rabin Medical Center between 2017-2023 (primary data set). An additional replication cohort including 100 842 samples from another SNP array platform, obtained from Maccabi Health Organization, was analyzed. Common ROH locations were defined as those ROH locations involving 1% or more of the samples. A total of 66 710 ROH segments, involving 13 035 samples (96.7%) were identified in the primary data set. Of the 4069 cytogenetic ROH locations, 68 were identified as common. The prevalence of non-common ROH was relatively high in affected individuals, and for acrocentric chromosomes, chromosomes associated with common trisomies, and non-imprinted chromosomes. In addition, differences in common ROH locations were observed between the primary and the replication cohorts. Our findings highlight the need for population-specific guidelines in determining ROH reporting cutoffs, considering factors such as population-specific prevalence and testing platform differences. Future research with larger, varied cohorts is essential to advance understanding of ROH's associations with medical conditions and to improve clinical practices accordingly.</p>","PeriodicalId":13070,"journal":{"name":"Human molecular genetics","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142106927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}