1
|
Ramadesikan S, Colwell CM, Supinger R, Hunter J, Thomas J, Varga E, Mardis ER, Wood RJ, Koboldt DC. Novel inherited CDX2 variant segregating in a family with diverse congenital malformations of the genitourinary system. Cold Spring Harb Mol Case Stud 2023; 9:a006294. [PMID: 37816608 PMCID: PMC10815271 DOI: 10.1101/mcs.a006294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Accepted: 09/12/2023] [Indexed: 10/12/2023] Open
Abstract
Anorectal malformations (ARMs) constitute a group of congenital defects of the gastrointestinal and urogenital systems. They affect males and females, with an estimated worldwide prevalence of 1 in 5000 live births. These malformations are clinically heterogeneous and can be part of a syndromic presentation (syndromic ARM) or as a nonsyndromic entity (nonsyndromic ARM). Despite the well-recognized heritability of nonsyndromic ARM, the genetic etiology in most patients is unknown. In this study, we describe three siblings with diverse congenital anomalies of the genitourinary system, anemia, delayed milestones, and skeletal anomalies. Genome sequencing identified a novel, paternally inherited heterozygous Caudal type Homeobox 2 (CDX2) variant (c.722A > G (p.Glu241Gly)), that was present in all three affected siblings. The variant identified in this family is absent from population databases and predicted to be damaging by most in silico pathogenicity tools. So far, only two other reports implicate variants in CDX2 with ARMs. Remarkably, the individuals described in these studies had similar clinical phenotypes and genetic alterations in CDX2 CDX2 encodes a transcription factor and is considered the master regulator of gastrointestinal development. This variant maps to the homeobox domain of the encoded protein, which is critical for interaction with DNA targets. Our finding provides a potential molecular diagnosis for this family's condition and supports the role of CDX2 in anorectal anomalies. It also highlights the clinical heterogeneity and variable penetrance of ARM predisposition variants, another well-documented phenomenon. Finally, it underscores the diagnostic utility of genomic profiling of ARMs to identify the genetic etiology of these defects.
Collapse
Affiliation(s)
- Swetha Ramadesikan
- Steve and Cindy Rasmussen Institute for Genomic Medicine, Nationwide Children's Hospital, Columbus, Ohio 43205, USA
| | - Caitlyn M Colwell
- Steve and Cindy Rasmussen Institute for Genomic Medicine, Nationwide Children's Hospital, Columbus, Ohio 43205, USA
| | - Rachel Supinger
- Steve and Cindy Rasmussen Institute for Genomic Medicine, Nationwide Children's Hospital, Columbus, Ohio 43205, USA
| | - Jesse Hunter
- Steve and Cindy Rasmussen Institute for Genomic Medicine, Nationwide Children's Hospital, Columbus, Ohio 43205, USA
| | - Jessica Thomas
- Department of Pediatric Colorectal & Pelvic Reconstructive Surgery, Nationwide Children's Hospital, Columbus, Ohio 43205, USA
| | - Elizabeth Varga
- Steve and Cindy Rasmussen Institute for Genomic Medicine, Nationwide Children's Hospital, Columbus, Ohio 43205, USA
| | - Elaine R Mardis
- Steve and Cindy Rasmussen Institute for Genomic Medicine, Nationwide Children's Hospital, Columbus, Ohio 43205, USA
- Department of Pediatrics, The Ohio State University College of Medicine, Columbus, Ohio 43210, USA
| | - Richard J Wood
- Department of Pediatric Colorectal & Pelvic Reconstructive Surgery, Nationwide Children's Hospital, Columbus, Ohio 43205, USA
- Department of Surgery, The Ohio State University College of Medicine, Columbus, Ohio 43210, USA
| | - Daniel C Koboldt
- Steve and Cindy Rasmussen Institute for Genomic Medicine, Nationwide Children's Hospital, Columbus, Ohio 43205, USA;
- Department of Pediatrics, The Ohio State University College of Medicine, Columbus, Ohio 43210, USA
| |
Collapse
|
2
|
Belanger Deloge R, Zhao X, Luna PN, Shaw CA, Rosenfeld JA, Scott DA. High molecular diagnostic yields and novel phenotypic expansions involving syndromic anorectal malformations. Eur J Hum Genet 2023; 31:296-303. [PMID: 36474027 PMCID: PMC9995493 DOI: 10.1038/s41431-022-01255-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 11/04/2022] [Accepted: 11/22/2022] [Indexed: 12/12/2022] Open
Abstract
Evidence suggests that genetic factors contribute to the development of anorectal malformations (ARMs). However, the etiology of the majority of ARMs cases remains unclear. Exome sequencing (ES) may be underutilized in the diagnostic workup of ARMs due to uncertainty regarding its diagnostic yield. In a clinical database of ~17,000 individuals referred for ES, we identified 130 individuals with syndromic ARMs. A definitive or probable diagnosis was made in 45 of these individuals for a diagnostic yield of 34.6% (45/130). The molecular diagnostic yield of individuals who initially met criteria for VACTERL association was lower than those who did not (26.8% vs 44.1%; p = 0.0437), suggesting that non-genetic factors may play an important role in this subset of syndromic ARM cases. Within this cohort, we identified two individuals who carried de novo pathogenic frameshift variants in ADNP, two individuals who were homozygous for pathogenic variants in BBS1, and single individuals who carried pathogenic or likely pathogenic variants in CREBBP, EP300, FANCC, KDM6A, SETD2, and SMARCA4. The association of these genes with ARMs was supported by previously published cases, and their similarity to known ARM genes as demonstrated using a machine learning algorithm. These data suggest that ES should be considered for all individuals with syndromic ARMs in whom a molecular diagnosis has not been made, and that ARMs represent a low penetrance phenotype associated with Helsmoortel-van der Aa syndrome, Bardet-Biedl syndrome 1, Rubinstein-Taybi syndromes 1 and 2, Fanconi anemia group C, Kabuki syndrome 2, SETD2-related disorders, and Coffin-Siris syndrome 4.
Collapse
Affiliation(s)
- Raymond Belanger Deloge
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Xiaonan Zhao
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
- Baylor Genetics, Houston, TX, USA
| | - Pamela N Luna
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Chad A Shaw
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Jill A Rosenfeld
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Daryl A Scott
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA.
- Department of Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, TX, 77030, USA.
| |
Collapse
|
3
|
Reutter H. High molecular diagnostic yields and novel phenotypic expansions involving syndromic anorectal malformations. Eur J Hum Genet 2023; 31:273-274. [PMID: 36599943 PMCID: PMC9995338 DOI: 10.1038/s41431-022-01272-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 12/12/2022] [Indexed: 01/06/2023] Open
Affiliation(s)
- Heiko Reutter
- Division of Neonatology and Pediatric Intensive Care, Department of Pediatrics and Adolescent Medicine, Friedrich-Alexander University of Erlangen-Nürnberg, Erlangen, Germany.
- Institute of Human Genetics, Friedrich-Alexander University of Erlangen-Nürnberg, Erlangen, Germany.
| |
Collapse
|
4
|
Liu D, Qu Y, Cao ZN, Jia HM. Rno_circ_0005139 regulates apoptosis by targeting Wnt5a in rat anorectal malformations. World J Gastroenterol 2020; 26:4272-4287. [PMID: 32848333 PMCID: PMC7422537 DOI: 10.3748/wjg.v26.i29.4272] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 05/09/2020] [Accepted: 05/26/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND The molecular mechanisms underlying anorectal malformations (ARM) are not fully established. Circular RNAs (circRNAs) are new born non-coding RNAs, and their role in ARM is unclear. We assumed that rno_circ_0005139 influences apoptosis and proliferation by acting as a miR-324-3p sponge, and downregulating Wnt5a in ARM.
AIM To identify the differential expression of circRNAs and mRNAs in a rat ARM model.
METHODS Sixty-six pregnant Wistar rats were randomly divided into two groups: ARM group (2-imidazolidinethione-induced) and control groups. Embryos were harvested by cesarean delivery, and anorectal tissue was taken on embryonic days 16 (E16), 17 (E17), 19 (E19), and 21 (E21). RNA sequencing and gene microarray analysis was used to identify differentially expressed circRNAs and mRNAs in the ARM in a rat model. We selected 6 circRNAs and 3 mRNAs in the Wnt signal pathway from the result of the RNA sequencing and gene microarray analysis, and quantitative reverse transcription polymerase chain reaction was performed to evaluate their tissue expression. According to bioinformatics prediction, rno_circ_0005139 acted as a miR-324-3p sponge to regulate the expression of Wnt5a. We chose rno_circ_0005139 and Wnt5a as the final candidates. We tested the function of rno_circ_0005139 and the binding sites between rno_circ_0005139 and miR-324-3p, miR-324-3p and Wnt5a by luciferase assays. Co-transfection of rno_circ_0005139 and miR-324-3p was to verify their functional consistency.
RESULTS We identified 38 upregulated and 42 downregulated circRNAs on E17 (P < 0.05), and 301 mRNAs were upregulated and 256 downregulated in the ARM on E17 (P < 0.05, fold-change > 2.0). We found that rno_circ_0006880 and rno_circ_0011386 were upregulated, whereas rno_circ_0000436, rno_circ_0005139, rno_circ_0009285, rno_circ_0014367, Wnt5a, Wnt10b, and Wnt2b were downregulated in ARM tissues. According to bioinformatics prediction, rno_circ_0005139 acted as a miR-324-3p sponge to regulate the expression of Wnt5a. We chose rno_circ_0005139 and Wnt5a as the final candidates. Because the role and molecular mechanism of rno_circ_0005139 are poorly understood, its effect on apoptosis and proliferation was investigated by in vitro plasmid transfection. A luciferase experiment showed that rno_circ_0005139 could bind with miR-324-3p, which negatively regulated Wnt5a expression. The expression of miR-324-3p was significantly higher in ARM anorectal tissues than that in control group on E17 and E19; Wnt5a expression showed the opposite trend. In addition, a miR-324-3p inhibitor attenuated the effects of rno_circ_0005139 knockdown on ARM development.
CONCLUSION Rno_circ_0005139 influences cell proliferation and apoptosis by acting as a miR-324-3p sponge, thereby downregulating Wnt5a in ARM. Accordingly, rno_circ_0005139, miR-324-3p, and Wnt5a could be targeted therapeutic factors for ARM.
Collapse
Affiliation(s)
- Dan Liu
- Department of Pediatric Surgery, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning Province, China
| | - Yuan Qu
- Department of Pediatric Surgery, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning Province, China
| | - Zheng-Nong Cao
- Department of Pediatric Surgery, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning Province, China
| | - Hui-Min Jia
- Department of Pediatric Surgery, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning Province, China
| |
Collapse
|
5
|
van de Putte R, Wijers CHW, Reutter H, Vermeulen SH, Marcelis CLM, Brosens E, Broens PMA, Homberg M, Ludwig M, Jenetzky E, Zwink N, Sloots CEJ, de Klein A, Brooks AS, Hofstra RMW, Holsink SAC, van der Zanden LFM, Galesloot TE, Tam PKH, Steehouwer M, Acuna-Hidalgo R, van de Vorst M, Kiemeney LA, Garcia-Barceló MM, de Blaauw I, Brunner HG, Roeleveld N, van Rooij IALM. Exome chip association study excluded the involvement of rare coding variants with large effect sizes in the etiology of anorectal malformations. PLoS One 2019; 14:e0217477. [PMID: 31136621 PMCID: PMC6538182 DOI: 10.1371/journal.pone.0217477] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 05/13/2019] [Indexed: 01/09/2023] Open
Abstract
INTRODUCTION Anorectal malformations (ARM) are rare congenital malformations, resulting from disturbed hindgut development. A genetic etiology has been suggested, but evidence for the involvement of specific genes is scarce. We evaluated the contribution of rare and low-frequency coding variants in ARM etiology, assuming a multifactorial model. METHODS We analyzed 568 Caucasian ARM patients and 1,860 population-based controls using the Illumina HumanExome Beadchip array, which contains >240,000 rare and low-frequency coding variants. GenomeStudio clustering and calling was followed by re-calling of 'no-calls' using zCall for patients and controls simultaneously. Single variant and gene-based analyses were performed to identify statistically significant associations, applying Bonferroni correction. Following an extra quality control step, candidate variants were selected for validation using Sanger sequencing. RESULTS When we applied a MAF of ≥1.0%, no variants or genes showed statistically significant associations with ARM. Using a MAF cut-off at 0.4%, 13 variants initially reached statistical significance, but had to be discarded upon further inspection: ten variants represented calling errors of the software, while the minor alleles of the remaining three variants were not confirmed by Sanger sequencing. CONCLUSION Our results show that rare and low-frequency coding variants with large effect sizes, present on the exome chip do not contribute to ARM etiology.
Collapse
Affiliation(s)
- Romy van de Putte
- Department for Health Evidence, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
- * E-mail:
| | - Charlotte H. W. Wijers
- Department for Health Evidence, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Heiko Reutter
- Institute of Human Genetics, University of Bonn, Bonn, Germany
- Department of Neonatology, Children’s Hospital, University of Bonn, Bonn, Germany
| | - Sita H. Vermeulen
- Department for Health Evidence, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Carlo L. M. Marcelis
- Department of Human Genetics, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Erwin Brosens
- Department of Clinical Genetics, Erasmus Medical Centre, Rotterdam, The Netherlands
- Department of Pediatric Surgery, Sophia’s Children’s Hospital—Erasmus Medical Centre, Rotterdam, The Netherlands
| | - Paul M. A. Broens
- Department of Surgery, Division of Pediatric Surgery, University Medical Center Groningen, Groningen, The Netherlands
| | - Markus Homberg
- Department of Child and Adolescent Psychiatry and Psychotherapy, Johannes-Gutenberg University, Mainz, Germany
| | - Michael Ludwig
- Department of Clinical Chemistry and Clinical Pharmacology, University of Bonn, Bonn, Germany
| | - Ekkehart Jenetzky
- Department of Child and Adolescent Psychiatry and Psychotherapy, Johannes-Gutenberg University, Mainz, Germany
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center, Heidelberg, Germany
| | - Nadine Zwink
- Department of Clinical Chemistry and Clinical Pharmacology, University of Bonn, Bonn, Germany
| | - Cornelius E. J. Sloots
- Department of Pediatric Surgery, Sophia’s Children’s Hospital—Erasmus Medical Centre, Rotterdam, The Netherlands
| | - Annelies de Klein
- Department of Clinical Genetics, Erasmus Medical Centre, Rotterdam, The Netherlands
| | - Alice S. Brooks
- Department of Clinical Genetics, Erasmus Medical Centre, Rotterdam, The Netherlands
| | - Robert M. W. Hofstra
- Department of Clinical Genetics, Erasmus Medical Centre, Rotterdam, The Netherlands
| | - Sophie A. C. Holsink
- Department for Health Evidence, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Loes F. M. van der Zanden
- Department for Health Evidence, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Tessel E. Galesloot
- Department for Health Evidence, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Paul Kwong-Hang Tam
- Department of Surgery, Li Ka Shing Faculty of Medicine of the University of Hong Kong, Hong Kong, China
- Centre for Reproduction, Development and Growth, Li Ka Shing Faculty of Medicine of the University of Hong Kong, Hong Kong, China
- Department of Psychiatry, Li Ka Shing Faculty of Medicine of the University of Hong Kong, Hong Kong, China
| | - Marloes Steehouwer
- Department of Human Genetics, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Rocio Acuna-Hidalgo
- Department of Human Genetics, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Maartje van de Vorst
- Department of Human Genetics, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Lambertus A. Kiemeney
- Department for Health Evidence, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
- Department of Urology, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Maria-Mercè Garcia-Barceló
- Experimental Cardiology Laboratory, Division Heart and Lungs, University Medical Center Utrecht, Utrecht, the Netherlands
- Image Sciences Institute, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Ivo de Blaauw
- Department of Surgery—Pediatric Surgery, Radboudumc Amalia Children’s Hospital, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Han G. Brunner
- Department of Human Genetics, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
- Department of Clinical Genetics, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Nel Roeleveld
- Department for Health Evidence, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Iris A. L. M. van Rooij
- Department for Health Evidence, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
- Department of Surgery—Pediatric Surgery, Radboudumc Amalia Children’s Hospital, Radboud University Medical Center, Nijmegen, The Netherlands
| |
Collapse
|
6
|
Ting CY, Bhatia NS, Lim JY, Goh CYJ, Vasanwala RF, Ong CCP, Seow WT, Yeow VKL, Ting TW, Ng ISL, Jamuar SS. Further delineation of CDC45-related Meier-Gorlin syndrome with craniosynostosis and review of literature. Eur J Med Genet 2019; 63:103652. [PMID: 30986546 DOI: 10.1016/j.ejmg.2019.04.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 03/26/2019] [Accepted: 04/09/2019] [Indexed: 11/19/2022]
Abstract
Meier-Gorlin syndrome (MGS) is a rare autosomal recessive disorder characterized by the triad of short stature, microtia and absent or small patellae. We report on a patient with MGS secondary to biallelic mutations in CDC45 detected on whole exome sequencing (WES). Patients with MGS caused by mutations in CDC45 display a distinct phenotype characterized by craniosynostosis and anorectal malformation. Our patient had craniosynostosis, anorectal malformation and short stature, but did not have the microtia or patella hypoplasia. Our report also highlights the value of WES in aiding diagnosis of patients with rare genetic diseases. In conclusion, our case report and review of the literature illustrates the unique features of CDC45-related MGS as well as the benefits of WES in reducing the diagnostic odyssey for patients with rare genetic disorders.
Collapse
Affiliation(s)
- Chun Yi Ting
- Department of Paediatrics, KK Women's and Children's Hospital, Singapore.
| | - Neha Singh Bhatia
- Department of Paediatrics, KK Women's and Children's Hospital, Singapore; Division of Genetics, Children's Hospital at Montefiore, Albert Einstein College of Medicine, Bronx, NY, USA.
| | - Jiin Ying Lim
- Department of Paediatrics, KK Women's and Children's Hospital, Singapore.
| | - Chew-Yin Jasmine Goh
- Department of Paediatrics, KK Women's and Children's Hospital, Singapore; Division of Nursing, KK Women's and Children's Hospital, Singapore.
| | - Rashida Farhad Vasanwala
- Department of Paediatrics, KK Women's and Children's Hospital, Singapore; Paediatrics Academic Clinical Programme, Duke-NUS Medical School, Singapore.
| | | | - Wan Tew Seow
- Neurosurgery Service, KK Women's and Children's Hospital, Singapore.
| | - Vincent Kok-Leng Yeow
- Department of Plastic, Reconstructive and Aesthetic Surgery, KK Women's and Children's Hospital, Singapore.
| | - Teck Wah Ting
- Department of Paediatrics, KK Women's and Children's Hospital, Singapore; Paediatrics Academic Clinical Programme, Duke-NUS Medical School, Singapore.
| | - Ivy Swee-Lian Ng
- Department of Paediatrics, KK Women's and Children's Hospital, Singapore; Paediatrics Academic Clinical Programme, Duke-NUS Medical School, Singapore.
| | - Saumya Shekhar Jamuar
- Department of Paediatrics, KK Women's and Children's Hospital, Singapore; Paediatrics Academic Clinical Programme, Duke-NUS Medical School, Singapore; Institute of Precision Medicine, SingHealth Duke-NUS Medical School, Singapore.
| |
Collapse
|
7
|
Xiao H, Huang R, Chen L, Diao M, Li L. Integrating lncRNAs and mRNAs expression profiles in terminal hindgut of fetal rats with anorectal malformations. Pediatr Surg Int 2018; 34:971-982. [PMID: 30088056 DOI: 10.1007/s00383-018-4311-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/26/2018] [Indexed: 01/09/2023]
Abstract
BACKGROUND The detailed embryonic etiology and pathogenesis of anorectal malformations (ARMs) remains unclear. Recent studies have shown that gene expression abnormalities were the key factors that result in ARMs. Long non-coding RNAs (lncRNAs) were reported as the 'transcriptional noise' within the genome. The expression profiles of lncRNA and mRNA remain less characterized in the pathogenesis of ARMs. Furthermore, the function of lncRNAs in the regulation of this process has not been investigated so far. Therefore, this current study was aimed to integrate lncRNA and mRNA expression profiles in terminal hindgut of ethylenethiourea (ETU)-induced ARM rats using Agilents lncRNA and mRNA co-expression microarrays. METHODS ARM model was induced with ethylenethiourea (ETU) on gestational day 10. Cesarean deliveries were conducted to collect the embryos on gestational day 20. For the extraction of total RNA, 1-cm terminal hindgut tissues were collected from three fetal rats with similair weights. The microarrays and quantitative RT-PCR analysis were conducted to evaluate the lncRNA and mRNA expression profiles in normal fetal rats and ARM fetal rats. RESULTS Compared with control group, 164 lncRNAs were observed to be aberrantly expressed (FC ≥ 2; P < 0.05) in ARM group, including 36 upregulated and 128 downregulated, while 772 mRNAs were observed to be aberrantly expressed (FC ≥ 2; P < 0.05) in the terminal hindgut, including 350 up-regulated and 422 down-regulated. The differential expression profiles between the ARM and the control group were used for gene ontology (GO) and pathway analysis. A subset of those RNAs was identified to be closely related to the development process of ARMs. The four RNAs that were differentially expressed between the two groups were selected for qPCR validation, and the results were in line with the microarray data. In addition, the lncRNAs and mRNA co-expression network was established according to the correlation analysis. We predicted the functions of transregulatory lncRNAs by the TFs (transcription factors) which might modulate their expression. In the core network of lncRNA-TF pairs, the lncRNAs can be classified into 5 categories of pathways governed by Jun, c-Myc, Usf1, Alf2, and Stat3. CONCLUSION From the above results, it can be suggested that these aberrant lncRNAs might participate in the pathogenesis of ARM, and our present work may provide new research directions for future studies of ARMs.
Collapse
Affiliation(s)
- Hui Xiao
- Department of Pediatric Surgery, Capital Institute of Pediatrics, Beijing, 100020, People's Republic of China
- Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100730, People's Republic of China
| | - Rui Huang
- Department of Pediatric Surgery, Capital Institute of Pediatrics, Beijing, 100020, People's Republic of China
| | - Long Chen
- Department of Pediatric Surgery, Capital Institute of Pediatrics, Beijing, 100020, People's Republic of China
- Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100730, People's Republic of China
| | - Mei Diao
- Department of Pediatric Surgery, Capital Institute of Pediatrics, Beijing, 100020, People's Republic of China
| | - Long Li
- Department of Pediatric Surgery, Capital Institute of Pediatrics, Beijing, 100020, People's Republic of China.
| |
Collapse
|
8
|
Tang XB, Zhang J, Wang WL, Yuan ZW, Bai YZ. The expression analysis of Bmpr1a and Bmp2 during hindgut development in rat embryos with anorectal malformations. Exp Mol Pathol 2016; 101:143-9. [PMID: 27477499 DOI: 10.1016/j.yexmp.2016.07.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Revised: 07/07/2016] [Accepted: 07/27/2016] [Indexed: 11/20/2022]
Abstract
The aim of this study was to determine Bmpr1a and Bmp2 expression patterns during anorectal development in normal and anorectal malformation (ARM) embryos with a view to establishing the possible role of Bmpr1a and Bmp2 in ARM pathogenesis. ARM was induced with ethylenethiourea on the 10th gestational day (GD10) in rat embryos. The embryos were harvested by Cesarean deliveries. The expression of Bmpr1a and Bmp2 was evaluated in normal rat embryos (n=213) and ARM embryos (n=236) from GD14 to GD16. Immunohistochemical staining revealed, in normal embryos, that Bmpr1a and Bmp2 was mainly expressed on the epithelium of the urorectal septum (URS) and the cloacal membrane (CM) on GD14 and GD15. When the rectum separated from the urogenital sinus (UGS) on GD16, Bmpr1a- and Bmp2-immunolabeled cells were observed on the anorectal epithelium. In ARM embryos, the epithelium of the hindgut and URS demonstrated faint immunostaining for Bmpr1a and Bmp2. Analyses by Western blot and Real-time PCR revealed that Bmpr1a and Bmp2 protein and mRNA expression were significantly decreased in the ARM hindgut compared with normal hindgut on GD14 and GD15 (P<0.05). In ARM embryos, an imbalance in the spatiotemporal expression of Bmpr1a and Bmp2 was noted during anorectal morphogenesis from GD14 to GD16. Therefore, downregulation of Bmpr1a and Bmp2 at the time of cloacal separation into the primitive rectum and UGS might be related to the development of ARM.
Collapse
Affiliation(s)
- Xiao Bing Tang
- Department of Pediatric Surgery, Shengjing Hospital, China Medical University, Shenyang 110004, PR China
| | - Jin Zhang
- Department of Pediatrics, Women and Children's Hospital of Qingdao City, Qingdao 266034, PR China
| | - Wei Lin Wang
- Department of Pediatric Surgery, Shengjing Hospital, China Medical University, Shenyang 110004, PR China
| | - Zheng Wei Yuan
- The Key Laboratory of Health Ministry for Congenital Malformation, Shenyang 110004, PR China
| | - Yu Zuo Bai
- Department of Pediatric Surgery, Shengjing Hospital, China Medical University, Shenyang 110004, PR China.
| |
Collapse
|
9
|
Vydrych YV, Demikova NS, Filyushkin YN, Kalinenkova SG, Podolnaya MA, Lapina AS, Mashkov AE, Asanov AY. [[Epidemiological, Clinical and Genetic Characteristics of Anorectal Malformations (Review)].]. Eksp Klin Gastroenterol 2016:58-64. [PMID: 28614646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The review presents an analysis of current data on the epidemiology, etiology, clinical and genetic characteristics of congenital anorectal malformations (AM). According to international registers of congenital malformations prevalence of the AM varies from 2 to 5 per 10,000 births. There was no change in the prevalence over time of AM (absence of temporal trends). Most studies have indicated the predominance of males among patients with AM. Approximately 40 - 70% of patients with AM have congenital malformations of other organs and systems. The data on the participation of genetic and environmental factors in the origin of the AM. A brief clinical and genetic characteristics of the most common syndromes (association) with the AM.
Collapse
|