EpigeneticsPub Date : 2024-12-01Epub Date: 2024-03-25DOI: 10.1080/15592294.2024.2333586
Hasan Khatib, Jessica Townsend, Melissa A Konkel, Gabi Conidi, Julia A Hasselkus
{"title":"Calling the question: what is mammalian transgenerational epigenetic inheritance?","authors":"Hasan Khatib, Jessica Townsend, Melissa A Konkel, Gabi Conidi, Julia A Hasselkus","doi":"10.1080/15592294.2024.2333586","DOIUrl":"10.1080/15592294.2024.2333586","url":null,"abstract":"<p><p>While transgenerational epigenetic inheritance has been extensively documented in plants, nematodes, and fruit flies, its existence in mammals remains controversial. Several factors have contributed to this debate, including the lack of a clear distinction between intergenerational and transgenerational epigenetic inheritance (TEI), the inconsistency of some studies, the potential confounding effects of in-utero vs. epigenetic factors, and, most importantly, the biological challenge of epigenetic reprogramming. Two waves of epigenetic reprogramming occur: in the primordial germ cells and the developing embryo after fertilization, characterized by global erasure of DNA methylation and remodelling of histone modifications. Consequently, TEI can only occur if specific genetic regions evade this reprogramming and persist through embryonic development. These challenges have revived the long-standing debate about the possibility of inheriting acquired traits, which has been strongly contested since the Lamarckian and Darwinian eras. As a result, coupled with the absence of universally accepted criteria for transgenerational epigenetic studies, a vast body of literature has emerged claiming evidence of TEI. Therefore, the goal of this study is to advocate for establishing fundamental criteria that must be met for a study to qualify as evidence of TEI. We identified five criteria based on the consensus of studies that critically evaluated TEI. To assess whether published original research papers adhere to these criteria, we examined 80 studies that either claimed or were cited as supporting TEI. The findings of this analysis underscore the widespread confusion in this field and highlight the urgent need for a unified scientific consensus on TEI requirements.</p>","PeriodicalId":11767,"journal":{"name":"Epigenetics","volume":"19 1","pages":"2333586"},"PeriodicalIF":3.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10965103/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140206498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
EpigeneticsPub Date : 2024-12-01Epub Date: 2024-03-25DOI: 10.1080/15592294.2024.2332819
Emma Raitoharju, Sonja Rajić, Saara Marttila
{"title":"Non-coding 886 (<i>nc886</i>/<i>vtRNA2-1</i>), the epigenetic odd duck - implications for future studies.","authors":"Emma Raitoharju, Sonja Rajić, Saara Marttila","doi":"10.1080/15592294.2024.2332819","DOIUrl":"10.1080/15592294.2024.2332819","url":null,"abstract":"<p><p>Non-coding 886 (<i>nc886</i>, <i>vtRNA2-1</i>) is the only human polymorphically imprinted gene, in which the methylation status is not determined by genetics. Existing literature regarding the establishment, stability and consequences of the methylation pattern, as well as the nature and function of the <i>nc886</i> RNAs transcribed from the locus, are contradictory. For example, the methylation status of the locus has been reported to be stable through life and across somatic tissues, but also susceptible to environmental effects. The nature of the produced <i>nc886</i> RNA(s) has been redefined multiple times, and in carcinogenesis, these RNAs have been reported to have conflicting roles. In addition, due to the bimodal methylation pattern of the <i>nc886</i> locus, traditional genome-wide methylation analyses can lead to false-positive results, especially in smaller datasets. Herein, we aim to summarize the existing literature regarding <i>nc886</i>, discuss how the characteristics of <i>nc886</i> give rise to contradictory results, as well as to reinterpret, reanalyse and, where possible, replicate the results presented in the current literature. We also introduce novel findings on how the distribution of the <i>nc886</i> methylation pattern is associated with the geographical origins of the population and describe the methylation changes in a large variety of human tumours. Through the example of this one peculiar genetic locus and RNA, we aim to highlight issues in the analysis of DNA methylation and non-coding RNAs in general and offer our suggestions for what should be taken into consideration in future analyses.</p>","PeriodicalId":11767,"journal":{"name":"Epigenetics","volume":"19 1","pages":"2332819"},"PeriodicalIF":3.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10965113/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140206526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Role of N6-methyladenosine-related lncRnas in pseudoexfoliation glaucoma.","authors":"Jieying Guan, Xiaohong Chen, Zhidong Li, Shuifeng Deng, Aizezi Wumaier, Yuncheng Ma, Lingling Xie, Shengsong Huang, Yingting Zhu, Yehong Zhuo","doi":"10.1080/15592294.2024.2348840","DOIUrl":"10.1080/15592294.2024.2348840","url":null,"abstract":"<p><p>To explore the role of lncRNA m<sup>6</sup>A methylation modification in aqueous humour (AH) of patients with pseudoexfoliation glaucoma (PXG). Patients with open-angle PXG under surgery from June 2021 to December 2021 were selected. Age- and gender-matched patients with age-related cataract (ARC) were chosen as control. Patients underwent detailed ophthalmic examinations. 0.05-0.1 ml AH were extracted during surgery for MeRIP-Seq and RNA-Seq. Joint analysis was used to screen lncRNAs with differential m<sup>6</sup>A methylation modification and expression. Online software tools were used to draw lncRNA-miRNA-mRNA network (ceRNA). Expression of lncRNAs and mRNAs was confirmed using quantitative real-time PCR. A total of 4151 lncRNAs and 4386 associated m<sup>6</sup>A methylation modified peaks were identified in the PXG group. Similarly, 2490 lncRNAs and 2595 associated m<sup>6</sup>A methylation modified peaks were detected in the control. Compared to the ARC group, the PXG group had 234 hypermethylated and 402 hypomethylated m<sup>6</sup>A peaks, with statistically significant differences (| Fold Change (FC) |≥2, <i>p</i> < 0.05). Bioinformatic analysis revealed that these differentially methylated lncRNA enriched in extracellular matrix formation, tight adhesion, TGF- β signalling pathway, AMPK signalling pathway, and MAPK signalling pathway. Joint analysis identified 10 lncRNAs with differential m<sup>6</sup>A methylation and expression simultaneously. Among them, the expression of ENST000000485383 and ROCK1 were confirmed downregulated in the PXG group by RT-qPCR. m<sup>6</sup>A methylation modification may affect the expression of lncRNA and participate in the pathogenesis of PXG through the ceRNA network. ENST000000485383-hsa miR592-ROCK1 May be a potential target pathway for further investigation in PXG m<sup>6</sup>A methylation.</p>","PeriodicalId":11767,"journal":{"name":"Epigenetics","volume":"19 1","pages":"2348840"},"PeriodicalIF":3.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11086004/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140876161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
EpigeneticsPub Date : 2024-12-01Epub Date: 2024-06-24DOI: 10.1080/15592294.2024.2369006
Yanli Shen, Yan Yang, Yan Zhao, Saiteer Nuerlan, Yiyi Zhan, Chunling Liu
{"title":"YY1/circCTNNB1/miR-186-5p/YY1 positive loop aggravates lung cancer progression through the Wnt pathway.","authors":"Yanli Shen, Yan Yang, Yan Zhao, Saiteer Nuerlan, Yiyi Zhan, Chunling Liu","doi":"10.1080/15592294.2024.2369006","DOIUrl":"10.1080/15592294.2024.2369006","url":null,"abstract":"<p><p>Lung cancer is one familiar cancer that threatens the lives of humans. circCTNNB1 has been disclosed to have regulatory functions in some diseases. However, the functions and related regulatory mechanisms of circCTNNB1 in lung cancer remain largely indistinct. The mRNA and protein expression levels were examined through real-time polymerase chain reaction (RT-qPCR) and western blot. The cell proliferation was tested through CCK-8 assay. The cell migration and invasion were confirmed through Transwell assays. The cell senescence was evaluated through SA-β-gal assay. The binding ability between miR-186-5p and circCTNNB1 (or YY1) was verified through luciferase reporter and RIP assays. In this study, the higher expression of circCTNNB1 was discovered in lung cancer tissues and cell lines and resulted in poor prognosis. In addition, circCTNNB1 facilitated lung cancer cell proliferation, migration, invasion, and suppressed cell senescence. Knockdown of circCTNNB1 retarded the Wnt pathway. Mechanism-related experiments revealed that circCTNNB1 combined with miR-186-5p to target YY1. Through rescue assays, YY1 overexpression could rescue decreased cell proliferation, migration, invasion, increased cell senescence, and retarded Wnt pathway mediated by circCTNNB1 suppression. Furthermore, YY1 acts as a transcription factor that can transcriptionally activate circCTNNB1 to form YY1/circCTNNB1/miR-186-5p/YY1 positive loop. Through in vivo assays, circCTNNB1 accelerated tumour growth in vivo. All findings revealed that a positive loop YY1/circCTNNB1/miR-186-5p/YY1 aggravated lung cancer progression by modulating the Wnt pathway.</p>","PeriodicalId":11767,"journal":{"name":"Epigenetics","volume":"19 1","pages":"2369006"},"PeriodicalIF":2.9,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11197906/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141445902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
EpigeneticsPub Date : 2024-12-01Epub Date: 2024-07-11DOI: 10.1080/15592294.2024.2376948
M Elena Martinez, Aldona Karaczyn, Zhaofei Wu, Christian A Bennett, Kassey L Matoin, Heather M Daigle, Arturo Hernandez
{"title":"Transgenerational epigenetic self-memory of <i>Dio3</i> dosage is associated with <i>Meg3</i> methylation and altered growth trajectories and neonatal hormones.","authors":"M Elena Martinez, Aldona Karaczyn, Zhaofei Wu, Christian A Bennett, Kassey L Matoin, Heather M Daigle, Arturo Hernandez","doi":"10.1080/15592294.2024.2376948","DOIUrl":"10.1080/15592294.2024.2376948","url":null,"abstract":"<p><p>Intergenerational and transgenerational epigenetic effects resulting from conditions in previous generations can contribute to environmental adaptation as well as disease susceptibility. Previous studies in rodent and human models have shown that abnormal developmental exposure to thyroid hormone affects endocrine function and thyroid hormone sensitivity in later generations. Since the imprinted type 3 deiodinase gene (<i>Dio3</i>) regulates sensitivity to thyroid hormones, we hypothesize its epigenetic regulation is altered in descendants of thyroid hormone overexposed individuals. Using DIO3-deficient mice as a model of developmental thyrotoxicosis, we investigated <i>Dio3</i> total and allelic expression and growth and endocrine phenotypes in descendants. We observed that male and female developmental overexposure to thyroid hormone altered total and allelic <i>Dio3</i> expression in genetically intact descendants in a tissue-specific manner. This was associated with abnormal growth and neonatal levels of thyroid hormone and leptin. Descendant mice also exhibited molecular abnormalities in the <i>Dlk1-Dio3</i> imprinted domain, including increased methylation in <i>Meg3</i> and altered foetal brain expression of other genes of the <i>Dlk1-Dio3</i> imprinted domain. These molecular abnormalities were also observed in the tissues and germ line of DIO3-deficient ancestors originally overexposed to thyroid hormone <i>in utero</i>. Our results provide a novel paradigm of epigenetic self-memory by which <i>Dio3</i> gene dosage in a given individual, and its dependent developmental exposure to thyroid hormone, influences its own expression in future generations. This mechanism of epigenetic self-correction of <i>Dio3</i> expression in each generation may be instrumental in descendants for their adaptive programming of developmental growth and adult endocrine function.</p>","PeriodicalId":11767,"journal":{"name":"Epigenetics","volume":"19 1","pages":"2376948"},"PeriodicalIF":2.9,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11244338/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141589981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
EpigeneticsPub Date : 2024-12-01Epub Date: 2024-08-16DOI: 10.1080/15592294.2024.2392048
Yolande van Bever, Ruben G Boers, Hennie T Brüggenwirth, Wilfred Fj van IJcken, Frank J Magielsen, Annelies de Klein, Joachim B Boers, Leendert Hj Looijenga, Erwin Brosens, Joost Gribnau, Sabine E Hannema
{"title":"Genome-wide methylation analysis in patients with proximal hypospadias - a pilot study and review of the literature.","authors":"Yolande van Bever, Ruben G Boers, Hennie T Brüggenwirth, Wilfred Fj van IJcken, Frank J Magielsen, Annelies de Klein, Joachim B Boers, Leendert Hj Looijenga, Erwin Brosens, Joost Gribnau, Sabine E Hannema","doi":"10.1080/15592294.2024.2392048","DOIUrl":"10.1080/15592294.2024.2392048","url":null,"abstract":"<p><p>In patients with proximal hypospadias, often no genetic cause is identified despite extensive genetic testing. Many genes involved in sex development encode transcription factors with strict timing and dosing of the gene products. We hypothesised that there might be recurrent differences in DNA methylation in boys with hypospadias and that these might differ between patients born small versus appropriate for gestational age. Genome-wide Methylated DNA sequencing (MeD-seq) was performed on 32bp LpnPI restriction enzyme fragments after RE-digestion in leucocytes from 16 XY boys with unexplained proximal hypospadias, one with an unexplained XX testicular disorder/difference of sex development (DSD) and twelve, healthy, sex- and age-matched controls. Five of seven differentially methylated regions (DMRs) between patients and XY controls were in the Long Intergenic Non-Protein Coding RNA 665 (LINC00665; CpG24525). Three patients showed hypermethylation of MAP3K1. Finally, no DMRs in XX testicular DSD associated genes were identified in the XX boy versus XX controls. In conclusion, we observed no recognizable epigenetic signature in 16 boys with XY proximal hypospadias and no difference between children born small versus appropriate for gestational age. Comparison to previous methylation studies in individuals with hypospadias did not show consistent findings, possibly due to the use of different inclusion criteria, tissues and methods.</p>","PeriodicalId":11767,"journal":{"name":"Epigenetics","volume":"19 1","pages":"2392048"},"PeriodicalIF":2.9,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11373573/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141992223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
EpigeneticsPub Date : 2024-12-01Epub Date: 2024-01-21DOI: 10.1080/15592294.2024.2305082
Cristiana Libardi Miranda Furtado, Megan Hansen, Gislaine Satyko Kogure, Victor Barbosa Ribeiro, Nathanael Taylor, Murilo Racy Soares, Rui Alberto Ferriani, Kenneth Ivan Aston, Timothy Jenkins, Rosana Maria Dos Reis
{"title":"Resistance and aerobic training increases genome-wide DNA methylation in women with polycystic ovary syndrome.","authors":"Cristiana Libardi Miranda Furtado, Megan Hansen, Gislaine Satyko Kogure, Victor Barbosa Ribeiro, Nathanael Taylor, Murilo Racy Soares, Rui Alberto Ferriani, Kenneth Ivan Aston, Timothy Jenkins, Rosana Maria Dos Reis","doi":"10.1080/15592294.2024.2305082","DOIUrl":"10.1080/15592294.2024.2305082","url":null,"abstract":"<p><p>Physical activity is a first-line treatment for polycystic ovary syndrome (PCOS). Resistance or aerobic exercise improves metabolic complications, reproductive outcomes, and quality of life in PCOS. DNA methylation reprogramming during exercise may be the major modifier behind these changes. We sought to evaluate genome-wide DNA methylation changes after supervised resistance and aerobic exercise in women with PCOS. Exercises were performed in 56 women with PCOS (resistance, <i>n</i> = 30; aerobic, <i>n</i> = 26), for 16 weeks (wks), three times per week, in 50-minute to one-hour sessions. Anthropometric indices and hormonal and metabolic parameters were measured before and after training. Genome-wide leukocyte DNA methylation was analysed by Infinium Human MethylationEPIC 850K BeadChip microarrays (Illumina). Both resistance and aerobic exercise improved anthropometric indices, metabolic dysfunction, and hyperandrogenism in PCOS after the training programme, but no differences were observed between the two exercises. Resistance and aerobic exercise increased genome-wide DNA methylation, although resistance changed every category in the CpG island context (islands, shores, shelve, and open sea), whereas aerobic exercise altered CpG shores and the open sea. Using a stringent FDR (>40), 6 significantly differentially methylated regions (DMRs) were observed in the resistance exercise cohort and 14 DRMs in the aerobic cohort, all of which were hypermethylated. The increase in genome-wide DNA methylation may be related to the metabolic and hormonal changes observed in PCOS after resistance and aerobic exercise. Since the mammalian genome is hypermethylated globally to prevent genomic instability and ageing, resistance and aerobic exercise may promote health and longevity through environmentally induced epigenetic changes.</p>","PeriodicalId":11767,"journal":{"name":"Epigenetics","volume":"19 1","pages":"2305082"},"PeriodicalIF":2.9,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10802204/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139512191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
EpigeneticsPub Date : 2024-12-01Epub Date: 2024-10-21DOI: 10.1080/15592294.2024.2417151
Xuegeng Wang, Ramji K Bhandari
{"title":"Methylome profile of medaka eggs and sperm.","authors":"Xuegeng Wang, Ramji K Bhandari","doi":"10.1080/15592294.2024.2417151","DOIUrl":"10.1080/15592294.2024.2417151","url":null,"abstract":"<p><p>Eggs and sperm are responsible for the continuation of generations. Following the epigenetic reprogramming of the embryo, core epigenetic information present in the sperm and eggs is transmitted to offspring somatic cells prior to the blastula stage, which specifically influences gene expression in the cells. Differences in the patterns of DNA methylation between the paternal and maternal genomes are critical to regulating allele-specific gene expression in the developing embryo, constituting the basis of genomic imprinting in mammals. While the information on allele-specific epigenetic information has been limited to mammals, it is not clearly understood whether non-mammalian vertebrate gametes possess any sex-specific allelic epigenetic information and whether somatic cells maintain the allele-specific epigenetic information, particularly DNA methylation. To determine the landscape of DNA methylation in paternal and maternal alleles in a non-mammalian vertebrate, we profiled the methylome of egg in medaka fish and compared it with our previously published medaka sperm methylome. We identified a set of gamete-specific differentially methylated regions (DMRs) in the genome- medaka eggs maintained a significantly lower global methylation profile than the sperm. Based on our sequencing depth and data, 10 DMRs were hypermethylated, and 237 DMRs were hypomethylated in the eggs compared to the sperm methylome. Somatic cells in blastula maintained some of those parental gamete-specific DNA methylation profiles. Those DMRs are associated with 70 genes, suggesting that they may have imprinted-like functions and warrant further investigation.</p>","PeriodicalId":11767,"journal":{"name":"Epigenetics","volume":"19 1","pages":"2417151"},"PeriodicalIF":2.9,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11497970/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142460920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
EpigeneticsPub Date : 2024-12-01Epub Date: 2024-05-13DOI: 10.1080/15592294.2024.2346694
Alexandre Champroux, Yang Tang, David A Dickson, Alice Meng, Anne Harrington, Lucy Liaw, Matteo Marzi, Francesco Nicassio, Thorsten M Schlaeger, Larry A Feig
{"title":"Transmission of reduced levels of miR-34/449 from sperm to preimplantation embryos is a key step in the transgenerational epigenetic inheritance of the effects of paternal chronic social instability stress.","authors":"Alexandre Champroux, Yang Tang, David A Dickson, Alice Meng, Anne Harrington, Lucy Liaw, Matteo Marzi, Francesco Nicassio, Thorsten M Schlaeger, Larry A Feig","doi":"10.1080/15592294.2024.2346694","DOIUrl":"10.1080/15592294.2024.2346694","url":null,"abstract":"<p><p>The transgenerational effects of exposing male mice to chronic social instability (CSI) stress are associated with decreased sperm levels of multiple members of the miR-34/449 family that persist after their mating through preimplantation embryo (PIE) development. Here we demonstrate the importance of these miRNA changes by showing that restoring miR-34c levels in PIEs derived from CSI stressed males prevents elevated anxiety and defective sociability normally found specifically in their adult female offspring. It also restores, at least partially, levels of sperm miR-34/449 normally reduced in their male offspring who transmit these sex-specific traits to their offspring. Strikingly, these experiments also revealed that inducing miR-34c levels in PIEs enhances the expression of its own gene and that of miR-449 in these cells. The same induction of embryo miR-34/449 gene expression likely occurs after sperm-derived miR-34c is introduced into oocytes upon fertilization. Thus, suppression of this miRNA amplification system when sperm miR-34c levels are reduced in CSI stressed mice can explain how a comparable fold-suppression of miR-34/449 levels can be found in PIEs derived from them, despite sperm containing ~50-fold lower levels of these miRNAs than those already present in PIEs. We previously found that men exposed to early life trauma also display reduced sperm levels of miR-34/449. And here we show that miR-34c can also increase the expression of its own gene, and that of miR-449 in human embryonic stem cells, suggesting that human PIEs derived from men with low sperm miR-34/449 levels may also contain this potentially harmful defect.</p>","PeriodicalId":11767,"journal":{"name":"Epigenetics","volume":"19 1","pages":"2346694"},"PeriodicalIF":3.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11093028/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140916317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"MK-801-exposure induces increased translation efficiency and mRNA hyperacetylation of <i>Grin2a</i> in the mouse prefrontal cortex.","authors":"Liting Xue, Jialu Zhao, Xu Liu, Tian Zhao, Ying Zhang, Haihong Ye","doi":"10.1080/15592294.2024.2417158","DOIUrl":"10.1080/15592294.2024.2417158","url":null,"abstract":"<p><p>Acute exposure to MK-801, the non-competitive N-methyl-D-aspartate (NMDA) receptor antagonist, induces schizophrenia-like behavioural changes in juvenile male mice. However, the effects of acute MK-801 exposure on brain gene expression at the translation level remain unclear. Here, we conducted ribosome profiling analysis on the prefrontal cortex (PFC) of acute MK-801-exposed juvenile male mice. We found 357 differentially translated genes, with the <i>N</i><sup>4</sup>-acetylcytidine (ac<sup>4</sup>C) consensus motif enriched in the transcripts with increased translation efficiency. Acetylated RNA immunoprecipitation sequencing revealed 148 differentially acetylated peaks, of which 121 were hyperacetylated, and 27 were hypoacetylated. Genes harbouring these peaks were enriched in pathways related to axon guidance, Hedgehog signalling pathway, neuron differentiation, and memory. <i>Grin2a</i> encodes an NMDA receptor subunit NMDAR2A, and its human orthologue is a strong susceptibility gene for schizophrenia. <i>Grin2a</i> mRNA was hyperacetylated and exhibited significantly increased translation efficiency. NMDAR2A protein level was increased in MK-801-exposed PFC. Pretreatment of Remodelin, an inhibitor of <i>N</i>-acetyltransferase 10, returned the NMDAR2A protein levels to normal and partially reversed schizophrenia-like behaviours of MK-801-exposed mice, shedding light on the possible role of mRNA acetylation in the aetiology of schizophrenia.</p>","PeriodicalId":11767,"journal":{"name":"Epigenetics","volume":"19 1","pages":"2417158"},"PeriodicalIF":2.9,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11520555/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142497364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}