1
|
Mhlanga-Mutangadura T, Bullock G, Cerda-Gonzalez S, Katz ML. Neuronal Ceroid Lipofuscinosis in a Mixed-Breed Dog with a Splice Site Variant in CLN6. Genes (Basel) 2024; 15:661. [PMID: 38927597 PMCID: PMC11203140 DOI: 10.3390/genes15060661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 05/14/2024] [Accepted: 05/17/2024] [Indexed: 06/28/2024] Open
Abstract
A 23-month-old neutered male dog of unknown ancestry presented with a history of progressive neurological signs that included anxiety, cognitive impairment, tremors, seizure activity, ataxia, and pronounced visual impairment. The clinical signs were accompanied by global brain atrophy. Due to progression in the severity of disease signs, the dog was euthanized at 26 months of age. An examination of the tissues collected at necropsy revealed dramatic intracellular accumulations of autofluorescent inclusions in the brain, retina, and cardiac muscle. The inclusions were immunopositive for subunit c of mitochondrial ATP synthase, and their ultrastructural appearances were similar to those of lysosomal storage bodies that accumulate in some neuronal ceroid lipofuscinosis (NCL) diseases. The dog also exhibited widespread neuroinflammation. Based on these findings, the dog was deemed likely to have suffered from a form of NCL. A whole genome sequence analysis of the proband's DNA revealed a homozygous C to T substitution that altered the intron 3-exon 4 splice site of CLN6. Other mutations in CLN6 cause NCL diseases in humans and animals, including dogs. The CLN6 protein was undetectable with immunolabeling in the tissues of the proband. Based on the clinical history, fluorescence and electron-microscopy, immunohistochemistry, and molecular genetic findings, the disorder in this dog was classified as an NCL resulting from the absence of the CLN6 protein. Screening the dog's genome for a panel of breed-specific polymorphisms indicated that its ancestry included numerous breeds, with no single breed predominating. This suggests that the CLN6 disease variant is likely to be present in other mixed-breed dogs and at least some ancestral breeds, although it is likely to be rare since other cases have not been reported to date.
Collapse
Affiliation(s)
- Tendai Mhlanga-Mutangadura
- Canine Genetics Laboratory, Department of Veterinary Pathobiology, College of Veterinary Medicine, University of Missouri, Columbia, MO 65211, USA; (T.M.-M.); (G.B.)
| | - Garrett Bullock
- Canine Genetics Laboratory, Department of Veterinary Pathobiology, College of Veterinary Medicine, University of Missouri, Columbia, MO 65211, USA; (T.M.-M.); (G.B.)
| | | | - Martin L. Katz
- Canine Genetics Laboratory, Department of Veterinary Pathobiology, College of Veterinary Medicine, University of Missouri, Columbia, MO 65211, USA; (T.M.-M.); (G.B.)
- Neurodegenerative Diseases Research Laboratory, Department of Ophthalmology, School of Medicine, University of Missouri, Columbia, MO 65212, USA
| |
Collapse
|
2
|
Chen X, Yu B, Wang Z, Li Q, Dai C, Wei J. Two novel mutations within FREM1 gene in patients with bifid nose. BMC Pediatr 2023; 23:631. [PMID: 38097983 PMCID: PMC10720098 DOI: 10.1186/s12887-023-04453-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 11/30/2023] [Indexed: 12/18/2023] Open
Abstract
BACKGROUND Bifid nose is a rare congenital deformity and the etiology is unknown. The purpose of this study was to report genetic variation in family of patients with bifid nose. METHODS Twenty-three consecutive patients who were diagnosed with mild bifid nose were operated with z-plasty from 2009 to 2021. Three underage patients (a pair of twins and a girl) from two family lines, who came to our hospital for surgical treatment, were enrolled. Whole exome sequencing and Sanger sequencing were conducted. Z-shaped flaps were created and the cartilago alaris major were re-stitched. Photographs and CT scan before and after surgery were obtained. Clinical outcomes, complications and patients' satisfaction were evaluated and analyzed. The follow-up time ranges from 2 to 3 years (2.4 ± 1.2 years). RESULTS Most patients were satisfied with the outcome (96.2%). The nasal deformities were corrected successfully with z-plasty technique in one-stage. FREM1 c.870_876del and c.2 T > C were detected with Whole exome sequencing, which have not been reported before. The results of Sanger sequencing were consistent with those of Whole exome sequencing. CONCLUSIONS The newly detected mutations of FREM1 have a certain heritability, and are helpful to make an accurate diagnosis and provide a better understanding of bifid nose mechanism. Z-plasty technique can be an effective technical approach for correcting mild bifid nose deformity.
Collapse
Affiliation(s)
- Xiaoxue Chen
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, 639 Zhi Zao Ju Rd, Shanghai, 200011, People's Republic of China
| | - Baofu Yu
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, 639 Zhi Zao Ju Rd, Shanghai, 200011, People's Republic of China
| | - Zi Wang
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, 639 Zhi Zao Ju Rd, Shanghai, 200011, People's Republic of China
| | - Qingfeng Li
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, 639 Zhi Zao Ju Rd, Shanghai, 200011, People's Republic of China.
| | - Chuanchang Dai
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, 639 Zhi Zao Ju Rd, Shanghai, 200011, People's Republic of China.
| | - Jiao Wei
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, 639 Zhi Zao Ju Rd, Shanghai, 200011, People's Republic of China.
| |
Collapse
|
3
|
Siddiqi S, Ain NU, Kauser M, Mukhtar Z, Ansar M, Umair M. Variants in FREM1 and trisomy 18 identified in a neonatal progeria patient. Mol Biol Rep 2023; 50:7935-7939. [PMID: 37470964 DOI: 10.1007/s11033-023-08595-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 06/14/2023] [Indexed: 07/21/2023]
Abstract
BACKGROUND Neonatal progeroid disorders are rare disorders with clinical features including low body mass index, proptosis, aged and dysmorphic facial features at the time of birth, prominent veins, sparse scalp hairs, and severe growth retardation. Very few cases have been identified with an unknown genetic cause. Here, we report clinical and genetic findings of a proband with hallmark features of neonatal progeria. METHODS Microarray comparative genomic hybridization, whole exome sequencing (WES) and Sanger sequencing were performed using standard methods. RESULTS Array combined genome hybridization data revealed trisomy 18 in the proband (II-1), and WES data identified novel compound heterozygous variants (c.247 C > T; p.H83Y and c.14769868InsA) in the FREM1 gene. CONCLUSION We report a novel complex case of neonatal progeria with atrial septal defects, trisomy 18 without typical features of Edward syndrome. The phenotype of the patient was more consistent with neonatal progeria, thus we speculate it to be caused by the FREM1 variants.
Collapse
Affiliation(s)
- Saima Siddiqi
- Institute of Biomedical and Genetic Engineering (IBGE), Islamabad, Pakistan.
| | - Noor Ul Ain
- Institute of Biomedical and Genetic Engineering (IBGE), Islamabad, Pakistan
| | - Mehran Kauser
- Institute of Biomedical and Genetic Engineering (IBGE), Islamabad, Pakistan
- Department of Animal Sciences/MLT, Faculty of life sciences, Karakoram International University (KIU), Gilgit, GB, Pakistan
| | - Zahra Mukhtar
- Institute of Biomedical and Genetic Engineering (IBGE), Islamabad, Pakistan
- PMAS arid Agriculture University, Rawalpindi, Pakistan
| | - Muhammad Ansar
- Laboratory of Genetic medicine and Development, University of Geneva, Geneva, Switzerland
| | - Muhammad Umair
- Medical Genomics Research Department, King Abdullah International Medical Research Center (KAIMRC), Ministry of National Guard Health Affairs (MNGH), King Saud Bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
| |
Collapse
|
4
|
Berrada S, Tazzite A, Bouzroud W, Gazzaz B, Lehlimi M, Dehbi H. Novel FREM1 homozygous variant in an individual with an intermediate phenotype between Bifid Nose with or without Anorectal and Renal Anomalies and Manitoba-oculo-tricho-anal syndromes. Clin Dysmorphol 2023; 32:36-38. [PMID: 36503923 DOI: 10.1097/mcd.0000000000000438] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Sarah Berrada
- Medical Genetics Laboratory, Ibn Rochd University Hospital
| | - Amal Tazzite
- Laboratory of Cellular and Molecular Pathology, Faculty of Medicine and Pharmacy, Hassan II University of Casablanca, Casablanca
| | - Wafaa Bouzroud
- Medical Genetics Laboratory, Ibn Rochd University Hospital
| | - Bouchaib Gazzaz
- Laboratory of Cellular and Molecular Pathology, Faculty of Medicine and Pharmacy, Hassan II University of Casablanca, Casablanca
- Genetics Anlysis Institute, Royal Gendarmerie, Rabat
| | - Mouna Lehlimi
- Division of Neonatology, Department of Pediatrics, Abderrahim Harouchi Children's Hospital, Ibn Rochd University Hospital, Casablanca, Morocco
| | - Hind Dehbi
- Medical Genetics Laboratory, Ibn Rochd University Hospital
- Laboratory of Cellular and Molecular Pathology, Faculty of Medicine and Pharmacy, Hassan II University of Casablanca, Casablanca
| |
Collapse
|
5
|
Connaughton DM, Hildebrandt F. Disease mechanisms of monogenic congenital anomalies of the kidney and urinary tract American Journal of Medical Genetics Part C. AMERICAN JOURNAL OF MEDICAL GENETICS. PART C, SEMINARS IN MEDICAL GENETICS 2022; 190:325-343. [PMID: 36208064 PMCID: PMC9618346 DOI: 10.1002/ajmg.c.32006] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 07/14/2022] [Accepted: 09/16/2022] [Indexed: 11/05/2022]
Abstract
Congenital Anomalies of the Kidney and Urinary Tract (CAKUT) is a developmental disorder of the kidney and/or genito-urinary tract that results in end stage kidney disease (ESKD) in up to 50% of children. Despite the congenital nature of the disease, CAKUT accounts for almost 10% of adult onset ESKD. Multiple lines of evidence suggest that CAKUT is a Mendelian disorder, including the observation of familial clustering of CAKUT. Pathogenesis in CAKUT is embryonic in origin, with disturbances of kidney and urinary tract development resulting in a heterogeneous range of disease phenotypes. Despite polygenic and environmental factors being implicated, a significant proportion of CAKUT is monogenic in origin, with studies demonstrating single gene defects in 10%-20% of patients with CAKUT. Here, we review monogenic disease causation with emphasis on the etiological role of gene developmental pathways in CAKUT.
Collapse
Affiliation(s)
- Dervla M Connaughton
- Schulich School of Medicine & Dentistry, University of Western Ontario, London, Ontario, Canada
- Department of Medicine, Division of Nephrology, London Health Sciences Centre, London, Ontario, Canada
| | - Friedhelm Hildebrandt
- Department of Pediatrics, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| |
Collapse
|
6
|
Kolvenbach CM, van der Ven AT, Kause F, Shril S, Scala M, Connaughton DM, Mann N, Nakayama M, Dai R, Kitzler TM, Schneider R, Schierbaum L, Schneider S, Accogli A, Torella A, Piatelli G, Nigro V, Capra V, Hoppe B, Märzheuser S, Schmiedeke E, Rehm HL, Mane S, Lifton RP, Dworschak GC, Hilger AC, Reutter H, Hildebrandt F. Exome survey of individuals affected by VATER/VACTERL with renal phenotypes identifies phenocopies and novel candidate genes. Am J Med Genet A 2021; 185:3784-3792. [PMID: 34338422 DOI: 10.1002/ajmg.a.62447] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 07/13/2021] [Accepted: 07/17/2021] [Indexed: 11/08/2022]
Abstract
The acronym VATER/VACTERL refers to the rare nonrandom association of the following component features (CFs): vertebral defects (V), anorectal malformations (ARM) (A), cardiac anomalies (C), tracheoesophageal fistula with or without esophageal atresia (TE), renal malformations (R), and limb anomalies (L). For the clinical diagnosis, the presence of at least three CFs is required, individuals presenting with only two CFs have been categorized as VATER/VACTERL-like. The majority of VATER/VACTERL individuals displays a renal phenotype. Hitherto, variants in FGF8, FOXF1, HOXD13, LPP, TRAP1, PTEN, and ZIC3 have been associated with the VATER/VACTERL association; however, large-scale re-sequencing could only confirm TRAP1 and ZIC3 as VATER/VACTERL disease genes, both associated with a renal phenotype. In this study, we performed exome sequencing in 21 individuals and their families with a renal VATER/VACTERL or VATER/VACTERL-like phenotype to identify potentially novel genetic causes. Exome analysis identified biallelic and X-chromosomal hemizygous potentially pathogenic variants in six individuals (29%) in B9D1, FREM1, ZNF157, SP8, ACOT9, and TTLL11, respectively. The online tool GeneMatcher revealed another individual with a variant in ZNF157. Our study suggests six biallelic and X-chromosomal hemizygous VATER/VACTERL disease genes implicating all six genes in the expression of human renal malformations.
Collapse
Affiliation(s)
- Caroline M Kolvenbach
- Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA.,Department of Pediatrics, University Hospital Bonn, Bonn, Germany
| | - Amelie T van der Ven
- Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Franziska Kause
- Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA.,Department of Pediatrics, University Hospital Bonn, Bonn, Germany
| | - Shirlee Shril
- Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Marcello Scala
- Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DINOGMI), University of Genoa, Genoa, Italy.,Pediatric Neurology and Muscular Diseases Unit, IRCCS Istituto Giannia Gaslini, University of Genoa, Genoa, Italy
| | - Dervla M Connaughton
- Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Nina Mann
- Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Makiko Nakayama
- Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Rufeng Dai
- Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Thomas M Kitzler
- Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Ronen Schneider
- Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Luca Schierbaum
- Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA.,Department of Pediatrics, University Hospital Bonn, Bonn, Germany
| | - Sophia Schneider
- Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA.,Department of Pediatrics, University Hospital Bonn, Bonn, Germany
| | - Andrea Accogli
- Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DINOGMI), University of Genoa, Genoa, Italy
| | - Annalaura Torella
- Department of Precision Medicine, University of Campania "Luigi Vanvitelli", Naples, Italy.,Telethon Institute of Genetics and Medicine, Pozzuoli, Italy
| | - Gianluca Piatelli
- Department of Neurosurgery, Gaslini Children's Hospital, Genoa, Italy
| | - Vincenzo Nigro
- Department of Precision Medicine, University of Campania "Luigi Vanvitelli", Naples, Italy.,Telethon Institute of Genetics and Medicine, Pozzuoli, Italy
| | - Valeria Capra
- Medical Genetics Unit, IRCCS Gianna Gaslini Institute, Genoa, Italy
| | | | - Stefanie Märzheuser
- Department of Pediatric Surgery, Campus Virchow Clinic, Charité University Hospital Berlin, Berlin, Germany
| | - Eberhard Schmiedeke
- Department of Pediatric Surgery and Urology, Center for Child and Youth Health, Klinikum Bremen-Mitte, Bremen, Germany
| | - Heidi L Rehm
- Program in Medical and Population Genetics, Broad Institute of Massachusetts Institute of Technology and Harvard, Cambridge, Massachusetts, USA
| | - Shrikant Mane
- Department of Genetics, Yale University School of Medicine, New Haven, Connecticut, USA.,Yale Center for Mendelian Genomics, Yale University School of Medicine, New Haven, Connecticut, USA
| | - Richard P Lifton
- Department of Genetics, Yale University School of Medicine, New Haven, Connecticut, USA.,Yale Center for Mendelian Genomics, Yale University School of Medicine, New Haven, Connecticut, USA
| | - Gabriel C Dworschak
- Department of Pediatrics, University Hospital Bonn, Bonn, Germany.,Institute of Human Genetics, Medical Faculty, University of Bonn, Bonn, Germany
| | - Alina C Hilger
- Department of Pediatrics, University Hospital Bonn, Bonn, Germany.,Institute of Human Genetics, Medical Faculty, University of Bonn, Bonn, Germany
| | - Heiko Reutter
- Institute of Human Genetics, Medical Faculty, University of Bonn, Bonn, Germany.,Department of Neonatology and Pediatric Intensive Care, University Hospital Bonn, Bonn, Germany.,Department of Neonatology and Pediatric Intensive Care, University Hospital Erlangen, Erlangen, Germany
| | - Friedhelm Hildebrandt
- Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| |
Collapse
|
7
|
The Potential Role of FREM1 and Its Isoform TILRR in HIV-1 Acquisition through Mediating Inflammation. Int J Mol Sci 2021; 22:ijms22157825. [PMID: 34360591 PMCID: PMC8346017 DOI: 10.3390/ijms22157825] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 07/13/2021] [Accepted: 07/20/2021] [Indexed: 02/06/2023] Open
Abstract
FREM1 (Fras-related extracellular matrix 1) and its splice variant TILRR (Toll-like interleukin-1 receptor regulator) have been identified as integral components of innate immune systems. The potential involvement of FREM1 in HIV-1 (human immunodeficiency virus 1) acquisition was suggested by a genome-wide SNP (single nucleotide polymorphism) analysis of HIV-1 resistant and susceptible sex workers enrolled in the Pumwani sex worker cohort (PSWC) in Nairobi, Kenya. The studies showed that the minor allele of a FREM1 SNP rs1552896 is highly enriched in the HIV-1 resistant female sex workers. Subsequent studies showed that FREM1 mRNA is highly expressed in tissues relevant to mucosal HIV-1 infection, including cervical epithelial tissues, and TILRR is a major modulator of many genes in the NF-κB signal transduction pathway. In this article, we review the role of FREM1 and TILRR in modulating inflammatory responses and inflammation, and how their influence on inflammatory responses of cervicovaginal tissue could enhance the risk of vaginal HIV-1 acquisition.
Collapse
|
8
|
Dawson AJ, Hovanes K, Liu J, Marles S, Greenberg C, Mhanni A, Chudley A, Frosk P, Sahoo T, Schanze D, Zenker M. Heterozygous intragenic deletions of FREM1 are not associated with trigonocephaly. Clin Dysmorphol 2021; 30:83-88. [PMID: 33038106 DOI: 10.1097/mcd.0000000000000351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Recessive mutations in FRAS1-related extracellular matrix 1 (FREM1) are associated with two rare genetic disorders, Manitoba-oculo-tricho-anal (MOTA) and bifid nose with or without anorectal and renal anomalies (BNAR). Fraser syndrome is a more severe disorder that shows phenotypic overlap with both MOTA and anorectal and renal anomalies and results from mutations in FRAS1, FREM2 and GRIP1. Heterozygous missense mutations in FREM1 were reported in association with isolated trigonocephaly with dominant inheritance and incomplete penetrance. Moreover, large deletions encompassing FREM1 have been reported in association with a syndromic form of trigonocephaly and were designated as trigonocephaly type 2. Trigonocephaly results from premature closure of the metopic suture and typically manifests as a form of nonsyndromic craniosynostosis. We report on 20 patients evaluated for developmental delay and without abnormal metopic suture. Chromosomal microarray analysis revealed heterozygous FREM1 deletions in 18 patients and in 4 phenotypically normal parents. Two patients were diagnosed with MOTA and had homozygous FREM1 deletions. Therefore, although our results are consistent with the previous reports of homozygous deletions causing MOTA, we report no association between heterozygous FREM1 deletions and trigonocephaly in this cohort.
Collapse
Affiliation(s)
- Angelika J Dawson
- Genomics, Shared Health Manitoba, Winnipeg
- Department of Biochemistry and Medical Genetics, Program of Genetics and Metabolism, University of Manitoba, Winnipeg, Manitoba, Canada
| | | | - Jing Liu
- Genomics, Shared Health Manitoba, Winnipeg
- Department of Biochemistry and Medical Genetics, Program of Genetics and Metabolism, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Sandra Marles
- Department of Biochemistry and Medical Genetics, Program of Genetics and Metabolism, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Cheryl Greenberg
- Department of Biochemistry and Medical Genetics, Program of Genetics and Metabolism, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Aziz Mhanni
- Department of Biochemistry and Medical Genetics, Program of Genetics and Metabolism, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Albert Chudley
- Department of Biochemistry and Medical Genetics, Program of Genetics and Metabolism, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Patrick Frosk
- Department of Biochemistry and Medical Genetics, Program of Genetics and Metabolism, University of Manitoba, Winnipeg, Manitoba, Canada
| | | | - Denny Schanze
- Institute of Human Genetics, University Hospital Magdeburg Leipziger Str. 44 39120 Magdeburg Germany
| | - Martin Zenker
- Institute of Human Genetics, University Hospital Magdeburg Leipziger Str. 44 39120 Magdeburg Germany
| |
Collapse
|
9
|
Tian Y, Yang J, Lan M, Zou T. Construction and analysis of a joint diagnosis model of random forest and artificial neural network for heart failure. Aging (Albany NY) 2020; 12:26221-26235. [PMID: 33401250 PMCID: PMC7803554 DOI: 10.18632/aging.202405] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 09/29/2020] [Indexed: 12/17/2022]
Abstract
Heart failure is a global health problem that affects approximately 26 million people worldwide. As conventional diagnostic techniques for heart failure have been in practice with various limitations, it is necessary to develop novel diagnostic models to supplement existing methods. With advances and improvements in gene sequencing technology in recent years, more heart failure-related genes have been identified. Using existing gene expression data in the Gene Expression Omnibus (GEO) database, we screened differentially expressed genes (DEGs) of heart failure and identified six key genes (HMOX2, SERPINA3, LCN6, CSDC2, FREM1, and ZMAT1) by random forest classifier. Of these genes, CSDC2, FREM1, and ZMAT1 have never been associated with heart failure. We also successfully constructed a new diagnostic model of heart failure using an artificial neural network and verified its diagnostic efficacy in public datasets.
Collapse
Affiliation(s)
- Yuqing Tian
- Peking University Fifth School of Clinical Medicine, Beijing 100730, P.R. China
- Department of Cardiology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Science, Beijing 100730, P.R. China
| | - Jiefu Yang
- Department of Cardiology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Science, Beijing 100730, P.R. China
| | - Ming Lan
- Department of Cardiology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Science, Beijing 100730, P.R. China
| | - Tong Zou
- Peking University Fifth School of Clinical Medicine, Beijing 100730, P.R. China
- Department of Cardiology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Science, Beijing 100730, P.R. China
| |
Collapse
|
10
|
Yosef N, Xi Y, McCarty JH. Isolation and transcriptional characterization of mouse perivascular astrocytes. PLoS One 2020; 15:e0240035. [PMID: 33031376 PMCID: PMC7544046 DOI: 10.1371/journal.pone.0240035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Accepted: 09/17/2020] [Indexed: 02/05/2023] Open
Abstract
In the post-natal mammalian brain perivascular astrocytes (PAs) ensheath blood vessels to regulate their unique permeability properties known as the blood-brain barrier (BBB). Very little is known about PA-expressed genes and signaling pathways that mediate contact and communication with endothelial cells (ECs) to regulate BBB physiology. This is due, in part, to lack of suitable models to distinguish PAs from other astrocyte sub-populations in the brain. To decipher the unique biology of PAs, we used in vivo gene knock-in technology to fluorescently label these cells in the adult mouse brain followed by fractionation and quantitative single cell RNA sequencing. In addition, PAs and non-PAs were also distinguished with transgenic fluorescent reporters followed by gene expression comparisons using bulk RNA sequencing. These efforts have identified several genes and pathways in PAs with potential roles in contact and communication with brain ECs. These genes encode various extracellular matrix (ECM) proteins and adhesion receptors, secreted growth factors, and intracellular signaling enzymes. Collectively, our experimental data reveal a set of genes that are expressed in PAs with putative roles in BBB physiology.
Collapse
Affiliation(s)
- Nejla Yosef
- Department of Neurosurgery, University of Texas M.D. Anderson Cancer Center, Houston, TX, United States of America
| | - Yuanxin Xi
- Department of Bioinformatics and Computational Biology, University of Texas M. D. Anderson Cancer Center, Houston, TX, United States of America
| | - Joseph H. McCarty
- Department of Neurosurgery, University of Texas M.D. Anderson Cancer Center, Houston, TX, United States of America
| |
Collapse
|
11
|
Showmaker KC, Cobb MB, Johnson AC, Yang W, Garrett MR. Whole genome sequencing and novel candidate genes for CAKUT and altered nephrogenesis in the HSRA rat. Physiol Genomics 2020; 52:56-70. [PMID: 31841396 PMCID: PMC6985787 DOI: 10.1152/physiolgenomics.00112.2019] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 12/09/2019] [Accepted: 12/09/2019] [Indexed: 12/30/2022] Open
Abstract
The HSRA rat is a model of congenital abnormalities of the kidney and urogenital tract (CAKUT). Our laboratory has used this model to investigate the role of nephron number (functional unit of the kidney) in susceptibility to develop kidney disease as 50-75% offspring are born with a single kidney (HSRA-S), while 25-50% are born with two kidneys (HSRA-C). HSRA-S rats develop increased kidney injury and hypertension with age compared with nephrectomized two-kidney animals (HSRA-UNX), suggesting that even slight differences in nephron number can be an important driver in decline in kidney function. The HSRA rat was selected and inbred from a family of outbred heterogeneous stock (NIH-HS) rats that exhibited a high incidence of CAKUT. The HS model was originally developed from eight inbred strains (ACI, BN, BUF, F344, M520, MR, WKY, and WN). The genetic make-up of the HSRA is therefore a mosaic of these eight inbred strains. Interestingly, the ACI progenitor of the HS model exhibits CAKUT in 10-15% of offspring with the genetic cause being attributed to the presence of a long-term repeat (LTR) within exon 1 of the c-Kit gene. Our hypothesis is that the HSRA and ACI share this common genetic cause, but other alleles in the HSRA genome contribute to the increased penetrance of CAKUT (75% HSRA vs. 15% in ACI). To facilitate genetic studies and better characterize the model, we sequenced the whole genome of the HSRA to a depth of ~50×. A genome-wide variant analysis of high-impact variants identified a number of novel genes that could be linked to CAKUT in the HSRA model. In summary, the identification of new genes/modifiers that lead to CAKUT/loss of one kidney in the HSRA model will provide greater insight into association between kidney development and susceptibility to develop cardiovascular disease later in life.
Collapse
Affiliation(s)
- Kurt C Showmaker
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, Mississippi
| | - Meredith B Cobb
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, Mississippi
| | - Ashley C Johnson
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, Mississippi
| | - Wenyu Yang
- College of Science, Huazhong Agricultural University, Wuhan, China
| | - Michael R Garrett
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, Mississippi
- Department of Medicine (Nephrology), University of Mississippi Medical Center, Jackson, Mississippi
| |
Collapse
|
12
|
Kashem MA, Li H, Toledo NP, Omange RW, Liang B, Liu LR, Li L, Yang X, Yuan XY, Kindrachuk J, Plummer FA, Luo M. Toll-like Interleukin 1 Receptor Regulator Is an Important Modulator of Inflammation Responsive Genes. Front Immunol 2019; 10:272. [PMID: 30873160 PMCID: PMC6403165 DOI: 10.3389/fimmu.2019.00272] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Accepted: 01/31/2019] [Indexed: 01/30/2023] Open
Abstract
TILRR (Toll-like interleukin-1 receptor regulator), a transcript variant of FREM1, is a novel regulatory component, which stimulates innate immune responses through binding to IL-1R1 (Interleukin-1 receptor, type 1) and TLR (Toll-like receptor) complex. However, it is not known whether TILRR expression influences other genes in the NFκB signal transduction and pro-inflammatory responses. Our previous study identified FREM1 as a novel candidate gene in HIV-1 resistance/susceptibility in the Pumwani Sex worker cohort. In this study, we investigated the effect of TILRR overexpression on expression of genes in the NFκB signaling pathway in vitro. The effect of TILRR on mRNA expression of 84 genes related to NFκB signal transduction pathway was investigated by qRT-PCR. Overexpression of TILRR on pro-inflammatory cytokine/chemokine(s) secretion in cell culture supernatants was analyzed using Bioplex multiplex bead assay. We found that TILRR overexpression significantly influenced expression of many genes in HeLa and VK2/E6E7 cells. Several cytokine/chemokine(s), including IL-6, IL-8 (CXCL8), IP-10, MCP-1, MIP-1β, and RANTES (CCL5) were significantly increased in the cell culture supernatants following TILRR overexpression. Although how TILRR influences the expression of these genes needs to be further studied, we are the first to show the influence of TILRR on many genes in the NFκB inflammatory pathways. The NFκB inflammatory response pathways are extremely important in microbial infection and pathogenesis, including HIV-1 transmission. Further study of the role of TILRR may identify the novel intervention targets and strategies against HIV infection.
Collapse
Affiliation(s)
- Mohammad Abul Kashem
- Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, MB, Canada.,JC Wilt Infectious Diseases Research Centre, National Microbiology Laboratory, Winnipeg, MB, Canada
| | - Hongzhao Li
- Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, MB, Canada.,JC Wilt Infectious Diseases Research Centre, National Microbiology Laboratory, Winnipeg, MB, Canada
| | - Nikki Pauline Toledo
- Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, MB, Canada.,JC Wilt Infectious Diseases Research Centre, National Microbiology Laboratory, Winnipeg, MB, Canada
| | - Robert Were Omange
- Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, MB, Canada.,JC Wilt Infectious Diseases Research Centre, National Microbiology Laboratory, Winnipeg, MB, Canada
| | - Binhua Liang
- JC Wilt Infectious Diseases Research Centre, National Microbiology Laboratory, Winnipeg, MB, Canada.,Department of Biochemistry and Medical Genetics, University of Manitoba, Winnipeg, MB, Canada
| | - Lewis Ruxi Liu
- Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, MB, Canada.,JC Wilt Infectious Diseases Research Centre, National Microbiology Laboratory, Winnipeg, MB, Canada
| | - Lin Li
- Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, MB, Canada.,JC Wilt Infectious Diseases Research Centre, National Microbiology Laboratory, Winnipeg, MB, Canada
| | - Xuefen Yang
- JC Wilt Infectious Diseases Research Centre, National Microbiology Laboratory, Winnipeg, MB, Canada
| | - Xin-Yong Yuan
- National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB, Canada
| | - Jason Kindrachuk
- Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, MB, Canada
| | - Francis A Plummer
- Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, MB, Canada
| | - Ma Luo
- Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, MB, Canada.,JC Wilt Infectious Diseases Research Centre, National Microbiology Laboratory, Winnipeg, MB, Canada.,National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB, Canada
| |
Collapse
|
13
|
van der Ven AT, Vivante A, Hildebrandt F. Novel Insights into the Pathogenesis of Monogenic Congenital Anomalies of the Kidney and Urinary Tract. J Am Soc Nephrol 2017; 29:36-50. [PMID: 29079659 DOI: 10.1681/asn.2017050561] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Congenital anomalies of the kidneys and urinary tract (CAKUT) comprise a large spectrum of congenital malformations ranging from severe manifestations, such as renal agenesis, to potentially milder conditions, such as vesicoureteral reflux. CAKUT causes approximately 40% of ESRD that manifests within the first three decades of life. Several lines of evidence indicate that CAKUT is often caused by recessive or dominant mutations in single (monogenic) genes. To date, approximately 40 monogenic genes are known to cause CAKUT if mutated, explaining 5%-20% of patients. However, hundreds of different monogenic CAKUT genes probably exist. The discovery of novel CAKUT-causing genes remains challenging because of this pronounced heterogeneity, variable expressivity, and incomplete penetrance. We here give an overview of known genetic causes for human CAKUT and shed light on distinct renal morphogenetic pathways that were identified as relevant for CAKUT in mice and humans.
Collapse
Affiliation(s)
- Amelie T van der Ven
- Divison of Nephrology, Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Asaf Vivante
- Divison of Nephrology, Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Friedhelm Hildebrandt
- Divison of Nephrology, Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts
| |
Collapse
|
14
|
Yang YD, Huang LY, Yan JM, Han J, Zhang Y, Li DZ. Novel FREM1 mutations are associated with severe hydrocephalus and shortened limbs in a prenatal case. Eur J Obstet Gynecol Reprod Biol 2017. [PMID: 28622873 DOI: 10.1016/j.ejogrb.2017.06.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yan-Dong Yang
- Fetal Medical Center, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, China; Guangzhou Women and Children's Medical Center affiliated to Guangzhou Medical University, Guangzhou, Guangdong, China; Euler Genomics, Beijing, China; Guangzhou Women and Children's Medical Center affiliated to Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Lv-Yin Huang
- Fetal Medical Center, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, China; Guangzhou Women and Children's Medical Center affiliated to Guangzhou Medical University, Guangzhou, Guangdong, China; Euler Genomics, Beijing, China; Guangzhou Women and Children's Medical Center affiliated to Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Jin-Mei Yan
- Fetal Medical Center, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, China; Guangzhou Women and Children's Medical Center affiliated to Guangzhou Medical University, Guangzhou, Guangdong, China; Euler Genomics, Beijing, China; Guangzhou Women and Children's Medical Center affiliated to Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Jin Han
- Fetal Medical Center, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, China; Guangzhou Women and Children's Medical Center affiliated to Guangzhou Medical University, Guangzhou, Guangdong, China; Euler Genomics, Beijing, China; Guangzhou Women and Children's Medical Center affiliated to Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Yi Zhang
- Fetal Medical Center, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, China; Guangzhou Women and Children's Medical Center affiliated to Guangzhou Medical University, Guangzhou, Guangdong, China; Euler Genomics, Beijing, China; Guangzhou Women and Children's Medical Center affiliated to Guangzhou Medical University, Guangzhou, Guangdong, China.
| | - Dong-Zhi Li
- Fetal Medical Center, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, China; Guangzhou Women and Children's Medical Center affiliated to Guangzhou Medical University, Guangzhou, Guangdong, China; Euler Genomics, Beijing, China; Guangzhou Women and Children's Medical Center affiliated to Guangzhou Medical University, Guangzhou, Guangdong, China.
| |
Collapse
|
15
|
Chacon-Camacho OF, Zenker M, Schanze D, Ledesma-Gil J, Zenteno JC. Novel FREM1 mutations in a patient with MOTA syndrome: Clinical findings, mutation update and review of FREM1-related disorders literature. Eur J Med Genet 2017; 60:190-194. [PMID: 28111185 DOI: 10.1016/j.ejmg.2017.01.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2016] [Revised: 01/16/2017] [Accepted: 01/18/2017] [Indexed: 10/20/2022]
Abstract
Manitoba-oculo-tricho-anal (MOTA) syndrome is an uncommon condition arising from biallelic mutations of FREM1 gene and clinically characterized by a variable spectrum of eyelid malformations, aberrant hairline, bifid or broad nasal tip, and gastrointestinal anomalies. In this report, we describe a patient with a phenotype compatible with MOTA syndrome (aberrant anterior hair line, hypertelorism, unilateral anophthalmia, and bifid and broad nasal tip) in whom two novel FREM1 mutations (c.305 A > G, p.Asp102Gly; and c.2626delG, p.Val876Tyrfs*16) were identified in the compound heterozygous state, thus broadening the mutational spectrum of the disease. We performed a literature review of the clinical and genetic features of individuals carrying FREM1 mutations.
Collapse
Affiliation(s)
- Oscar F Chacon-Camacho
- Department of Genetics, Institute of Ophthalmology "Conde de Valenciana", Mexico City, Mexico
| | - Martin Zenker
- Institute of Human Genetics, University Hospital of Magdeburg, Magdeburg, Germany
| | - Denny Schanze
- Institute of Human Genetics, University Hospital of Magdeburg, Magdeburg, Germany
| | - Jasbeth Ledesma-Gil
- Department of Glaucoma, Institute of Ophthalmology "Conde de Valenciana", Mexico City, Mexico
| | - Juan C Zenteno
- Department of Genetics, Institute of Ophthalmology "Conde de Valenciana", Mexico City, Mexico; Department of Biochemistry, Faculty of Medicine, National Autonomous University of Mexico, Mexico City, Mexico.
| |
Collapse
|
16
|
Talbot JC, Nichols JT, Yan YL, Leonard IF, BreMiller RA, Amacher SL, Postlethwait JH, Kimmel CB. Pharyngeal morphogenesis requires fras1-itga8-dependent epithelial-mesenchymal interaction. Dev Biol 2016; 416:136-148. [PMID: 27265864 PMCID: PMC4967372 DOI: 10.1016/j.ydbio.2016.05.035] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Accepted: 05/31/2016] [Indexed: 01/08/2023]
Abstract
Both Fras1 and Itga8 connect mesenchymal cells to epithelia by way of an extracellular 'Fraser protein complex' that functions in signaling and adhesion; these proteins are vital to the development of several vertebrate organs. We previously found that zebrafish fras1 mutants have craniofacial defects, specifically, shortened symplectic cartilages and cartilage fusions that spare joint elements. During a forward mutagenesis screen, we identified a new zebrafish mutation, b1161, that we show here disrupts itga8, as confirmed using CRISPR-generated itga8 alleles. fras1 and itga8 single mutants and double mutants have similar craniofacial phenotypes, a result expected if loss of either gene disrupts function of the Fraser protein complex. Unlike fras1 mutants or other Fraser-related mutants, itga8 mutants do not show blistered tail fins. Thus, the function of the Fraser complex differs in the craniofacial skeleton and the tail fin. Focusing on the face, we find that itga8 mutants consistently show defective outpocketing of a late-forming portion of the first pharyngeal pouch, and variably express skeletal defects, matching previously characterized fras1 mutant phenotypes. In itga8 and fras1 mutants, skeletal severity varies markedly between sides, indicating that both mutants have increased developmental instability. Whereas fras1 is expressed in epithelia, we show that itga8 is expressed complementarily in facial mesenchyme. Paired with the observed phenotypic similarity, this expression indicates that the genes function in epithelial-mesenchymal interactions. Similar interactions between Fras1 and Itga8 have previously been found in mouse kidney, where these genes both regulate Nephronectin (Npnt) protein abundance. We find that zebrafish facial tissues express both npnt and the Fraser gene fibrillin2b (fbn2b), but their transcript levels do not depend on fras1 or itga8 function. Using a revertible fras1 allele, we find that the critical window for fras1 function in the craniofacial skeleton is between 1.5 and 3 days post fertilization, which coincides with the onset of fras1-dependent and itga8-dependent morphogenesis. We propose a model wherein Fras1 and Itga8 interact during late pharyngeal pouch morphogenesis to sculpt pharyngeal arches through epithelial-mesenchymal interactions, thereby stabilizing the developing craniofacial skeleton.
Collapse
Affiliation(s)
- Jared Coffin Talbot
- Institute of Neuroscience, 1254 University of Oregon, Eugene, OR 97403, USA; Departments of Molecular Genetics and Biological Chemistry and Pharmacology, The Ohio State University, Columbus, OH 43210, USA.
| | - James T Nichols
- Institute of Neuroscience, 1254 University of Oregon, Eugene, OR 97403, USA
| | - Yi-Lin Yan
- Institute of Neuroscience, 1254 University of Oregon, Eugene, OR 97403, USA
| | - Isaac F Leonard
- Institute of Neuroscience, 1254 University of Oregon, Eugene, OR 97403, USA
| | - Ruth A BreMiller
- Institute of Neuroscience, 1254 University of Oregon, Eugene, OR 97403, USA
| | - Sharon L Amacher
- Departments of Molecular Genetics and Biological Chemistry and Pharmacology, The Ohio State University, Columbus, OH 43210, USA
| | | | - Charles B Kimmel
- Institute of Neuroscience, 1254 University of Oregon, Eugene, OR 97403, USA.
| |
Collapse
|
17
|
Rubinstein TJ, Weber AC, Traboulsi EI. Molecular biology and genetics of embryonic eyelid development. Ophthalmic Genet 2016; 37:252-9. [PMID: 26863902 DOI: 10.3109/13816810.2015.1071409] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The embryology of the eyelid is a complex process that includes interactions between the surface ectoderm and mesenchymal tissues. In the mouse and human, the eyelids form and fuse before birth; they open prenatally in the human and postnatally in the mouse. In the mouse, cell migration is stimulated by different growth factors such as FGF10, TGF-α, Activin B, and HB-EGF. These growth factors modulate downstream BMP4 signaling, the ERK cascade, and JNK/c-JUN. Several mechanisms, such as the Wnt/β-catenin signaling pathway, may inhibit and regulate eyelid fusion. Eyelid opening, on the other hand, is driven by the BMP/Smad signaling system. Several human genetic disorders result from dysregulation of the above molecular pathways.
Collapse
Affiliation(s)
| | - Adam C Weber
- a Cleveland Clinic Cole Eye Institute , Cleveland , Ohio , USA
| | | |
Collapse
|
18
|
Kohl S, Hwang DY, Dworschak GC, Hilger AC, Saisawat P, Vivante A, Stajic N, Bogdanovic R, Reutter HM, Kehinde EO, Tasic V, Hildebrandt F. Mild recessive mutations in six Fraser syndrome-related genes cause isolated congenital anomalies of the kidney and urinary tract. J Am Soc Nephrol 2014; 25:1917-22. [PMID: 24700879 DOI: 10.1681/asn.2013101103] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Congenital anomalies of the kidney and urinary tract (CAKUT) account for approximately 40% of children with ESRD in the United States. Hitherto, mutations in 23 genes have been described as causing autosomal dominant isolated CAKUT in humans. However, >90% of cases of isolated CAKUT still remain without a molecular diagnosis. Here, we hypothesized that genes mutated in recessive mouse models with the specific CAKUT phenotype of unilateral renal agenesis may also be mutated in humans with isolated CAKUT. We applied next-generation sequencing technology for targeted exon sequencing of 12 recessive murine candidate genes in 574 individuals with isolated CAKUT from 590 families. In 15 of 590 families, we identified recessive mutations in the genes FRAS1, FREM2, GRIP1, FREM1, ITGA8, and GREM1, all of which function in the interaction of the ureteric bud and the metanephric mesenchyme. We show that isolated CAKUT may be caused partially by mutations in recessive genes. Our results also indicate that biallelic missense mutations in the Fraser/MOTA/BNAR spectrum genes cause isolated CAKUT, whereas truncating mutations are found in the multiorgan form of Fraser syndrome. The newly identified recessive biallelic mutations in these six genes represent the molecular cause of isolated CAKUT in 2.5% of the 590 affected families in this study.
Collapse
Affiliation(s)
- Stefan Kohl
- Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Daw-Yang Hwang
- Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts; Division of Nephrology, Department of Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Gabriel C Dworschak
- Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts; Institute of Human Genetics, and
| | - Alina C Hilger
- Institute of Human Genetics, and Department of Pediatrics, University of Michigan, Ann Arbor, Michigan
| | - Pawaree Saisawat
- Department of Pediatrics, University of Michigan, Ann Arbor, Michigan
| | - Asaf Vivante
- Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Natasa Stajic
- Medical Faculty, University of Belgrade, Belgrade, Serbia; Institute of Mother and Child Healthcare of Serbia, Belgrade, Serbia
| | - Radovan Bogdanovic
- Medical Faculty, University of Belgrade, Belgrade, Serbia; Institute of Mother and Child Healthcare of Serbia, Belgrade, Serbia
| | - Heiko M Reutter
- Institute of Human Genetics, and Department of Neonatology, Children's Hospital, University of Bonn, Bonn, Germany
| | | | - Velibor Tasic
- Department of Pediatric Nephrology, University Children's Hospital, Skopje, Macedonia; and
| | - Friedhelm Hildebrandt
- Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts; Howard Hughes Medical Institute, Chevy Chase, Maryland
| |
Collapse
|