1
|
Santos BV, de Souza J, Zeny MS, Santos MLSF, do Valle DA. Phenotypic/Genotypic Profile of Children with Neuronal Ceroid Lipofuscinosis in Southern Brazil. Neuropediatrics 2024. [PMID: 38857616 DOI: 10.1055/s-0044-1787706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/12/2024]
Abstract
INTRODUCTION Neuronal ceroid lipofuscinoses (CLNs) are a group of lysosomal storage disorders of genetic origin, characterized by progressive neurodegeneration and intracellular accumulation of autofluorescent lipopigment. Thirteen genes related to CLNs are currently described, showing genetic and allelic heterogeneity, most of them with an autosomal recessive pattern. Due to the few descriptions of cases related to CLNs in Brazil, it is necessary to describe the phenotypic and genotypic characteristics of these patients. This study aims to evaluate the genotypic profile and correlate it with the phenotypic characteristics of patients with CLN in a children's hospital. METHODS This study was performed as a descriptive cross-sectional study with analysis of medical records, imaging, and laboratory tests of patients who had a confirmed molecular diagnosis of CLN. RESULTS The sample consisted of 11 patients from nine families with different subtypes of CLNs (CLN2, 5, 6, 7, and 8), with CLN2 being the most prevalent in the study. A total of 16 mutation variants were identified in genes associated with the five CLNs described in this study, with typical and atypical clinical phenotypes depending on the subtype and its variants. CONCLUSION Novel mutations identified in the patients in this study showed phenotypes of rapid and severe progression in the CLN2 patient and similar characteristics in CLN6 and CLN7 patients, as previously described in the literature.
Collapse
Affiliation(s)
| | - Josiane de Souza
- Departament of Medical Genetic, Hospital Pequeno Príncipe, Curitiba, Paraná, Brazil
| | - Michelle Silva Zeny
- Department of Neurology, Hospital Pequeno Príncipe, Curitiba, Paraná, Brazil
| | | | | |
Collapse
|
2
|
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
|
3
|
Ilyas M, Tariq F, Ishaq R, Habiba U, Bibi F, Khan SN, Ali Y, Haider S, Efthymiou S, Abdullah U, Raja GK, Shaiq PA. Whole exome sequencing identifies variable expressivity of CLN6 variants in Progressive myoclonic epilepsy affected families. Epilepsy Res 2024; 201:107283. [PMID: 38382230 DOI: 10.1016/j.eplepsyres.2023.107283] [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: 10/04/2023] [Revised: 11/25/2023] [Accepted: 12/14/2023] [Indexed: 02/23/2024]
Abstract
Progressive myoclonic epilepsies (PMEs) are a group of neurodegenerative disorders, predominantly affecting adolescents and, characterized by generalized worsening myoclonus epilepsies, ataxia, cognitive deficits, and dementia. To date, several genes, having implications in diverse phenotypic expressions associated with PMEs, have been identified. Genetic diagnosis is available for most of the adolescence-onset myoclonic epilepsies. This study aimed to elucidate the genetic basis of PMEs in three multiplex Pakistani families exhibiting clinically variable phenotypes. Causative variant(s) in the studied families, and mode of segregation were identified by Whole Exome Sequencing (WES) of the probands, followed by bi-directional Sanger sequencing for final validation. We identified homozygous recessive CLN6 missense variant c.768 C>G (p.Asp256Glu) in Family 1, and c.889 C>A (p.Pro297Thr) variant in Family 2. While in Family 3, we found a homozygous variant (c.316dup) that caused a frameshift mutation, leading to a premature stop codon in the CLN6 protein, resulting in a truncated protein (p.Arg106ProfsTer26). Though CLN6 is previously identified to underlie late infantile and adolescent onset neuronal ceroid lipofuscinosis, this study supports and expands the phenotypic spectrum of CLN6 mutations and signifies diagnositc potential CLN6 variants for PMEs. Diverse pathological effects of variant c .768 C>G were observed in Family 1, with same genotypes, suggesting clinical heterogeneity and/or variable expressivity that might be the implication of pleiotropic effects of the gene in these cases.
Collapse
Affiliation(s)
- Muhammad Ilyas
- University Institute of Biochemistry and Biotechnology, (PMAS) Pir Mehr Ali Shah Arid Agriculture University Rawalpindi, Pakistan; Department of Medical Laboratory Technology, Riphah International University, Malakand Campus, Khyber Pakhtunkhwa, Pakistan
| | - Faiza Tariq
- University Institute of Biochemistry and Biotechnology, (PMAS) Pir Mehr Ali Shah Arid Agriculture University Rawalpindi, Pakistan
| | - Rafaqat Ishaq
- University Institute of Biochemistry and Biotechnology, (PMAS) Pir Mehr Ali Shah Arid Agriculture University Rawalpindi, Pakistan
| | - Umme Habiba
- University Institute of Biochemistry and Biotechnology, (PMAS) Pir Mehr Ali Shah Arid Agriculture University Rawalpindi, Pakistan
| | - Farah Bibi
- University Institute of Biochemistry and Biotechnology, (PMAS) Pir Mehr Ali Shah Arid Agriculture University Rawalpindi, Pakistan
| | - Sadiq Noor Khan
- Department of Medical Laboratory Technology, University of Haripur, Khyber Pakhtunkhwa, Pakistan
| | - Yasir Ali
- Institute of Chemistry, Solvak Academy of Sciences, 84538 Bratislava, Slovakia
| | - Shehzad Haider
- Wah Medical College, Izzat Ali Shah Hospital, Maternal and Child Health Centre, Wah Cantt, Pakistan
| | | | - Uzma Abdullah
- University Institute of Biochemistry and Biotechnology, (PMAS) Pir Mehr Ali Shah Arid Agriculture University Rawalpindi, Pakistan
| | - Ghazala Kaukab Raja
- University Institute of Biochemistry and Biotechnology, (PMAS) Pir Mehr Ali Shah Arid Agriculture University Rawalpindi, Pakistan
| | - Pakeeza Arzoo Shaiq
- University Institute of Biochemistry and Biotechnology, (PMAS) Pir Mehr Ali Shah Arid Agriculture University Rawalpindi, Pakistan.
| |
Collapse
|
4
|
Jia W, Luo Y, Wang J, Yang Y, Yang W, Zhang X. Juvenile-Onset Kufs Disease in a Chinese Consanguineous Family due to CLN6 Mutation. NEURODEGENER DIS 2022; 21:126-131. [PMID: 35609511 DOI: 10.1159/000524784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Accepted: 04/19/2022] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE To identify the genetic cause of two cases of Kufs disease in the same family. The two affected individuals exhibited different levels of severity under magnetic resonance imaging (MRI). METHODS Whole-exome sequencing was performed on affected individuals, and the candidate gene was confirmed by Sanger sequencing. Western blot analysis was used to evaluate the level of expression of CLN6 protein in 239T cells. RESULTS We identified a novel homozygous mutation of the CLN6 gene (c.14G>T, p.Arg5Leu) in a consanguineous Chinese family in which two people had Kufs disease. Both patients exhibited seizures and progressive psychomotor decline and mental deterioration without visual impairment. They had different ages of onset, although they carried the same missense mutation. The affected female showed pronounced abnormal MRI signal in the bilateral hippocampus while her younger brother only showed a very slight abnormal signal. Further study showed that this missense mutation could decrease the level of expression of CLN6 protein. CONCLUSIONS A novel homozygous mutation of the CLN6 gene was identified, and patients with the same mutation showed different ages of onset and different levels of severity under MRI. SIGNIFICANCE Our study established that the same CLN6 mutation could produce different phenotypes in patients, and it has expanded the mutational and phenotypical spectrum of the CLN6 gene.
Collapse
Affiliation(s)
- Weimin Jia
- College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China
| | - Yalin Luo
- College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China
| | - Jiuxiang Wang
- Experimental Center of Clinical Research, The First Affiliated Hospital of Anhui University of Chinese Medicine, Hefei, China
| | - Yue Yang
- Department of Neurology, The First Affiliated Hospital of Anhui University of Chinese Medicine, Hefei, China
| | - Wenming Yang
- Department of Neurology, The First Affiliated Hospital of Anhui University of Chinese Medicine, Hefei, China
| | - Xianqin Zhang
- College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China
| |
Collapse
|
5
|
Nicolaou P, Tanteles GA, Votsi C, Zamba-Papanicolaou E, Papacostas SS, Christodoulou K, Christou YP. A Novel CLN6 Variant Associated With Juvenile Neuronal Ceroid Lipofuscinosis in Patients With Absence of Visual Loss as a Presenting Feature. Front Genet 2021; 12:746101. [PMID: 34868216 PMCID: PMC8640139 DOI: 10.3389/fgene.2021.746101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 10/05/2021] [Indexed: 11/13/2022] Open
Abstract
The neuronal ceroid lipofuscinoses (NCLs), also known as Batten disease, are a group of autosomal recessive lysosomal storage disorders that are characterized by neurodegeneration, progressive cognitive decline, motor impairment, ataxia, loss of vision, seizures, and premature death. To date, pathogenic variants in more than 13 genes have been associated with NCLs. CLN6 encodes an endoplasmic reticulum non-glycosylated transmembrane protein, which is involved in lysosomal acidification. Mutations in CLN6 cause late-infantile juvenile NCL (JNCL) adult-onset NCL, and Kufs disease. Members from two available families with JNCL were clinically evaluated, and samples were collected from consenting individuals. The molecular investigation was performed by whole-exome sequencing, Sanger sequencing, and family segregation analysis. Furthermore, in silico prediction analysis and structural modeling of the identified CLN6 variants were performed. We report clinical and genetic findings of three patients from two Greek-Cypriot families (families 915 and 926) with JNCL. All patients were males, and the first symptoms appeared at the age of 6 years. The proband of family 926 presented with loss of motor abilities, ataxia, spasticity, seizure, and epilepsy. The proband of family 915 had ataxia, spasticity, dysarthria, dystonia, and intellectual disability. Both probands did not show initial signs of vision and/or hearing loss. Molecular analysis of family 926 revealed two CLN6 biallelic variants: the novel, de novo p.Tyr295Cys and the known p.Arg136His variants. In family 915, both patients were homozygous for the p.Arg136His CLN6 variant. Prediction analysis of the two CLN6 variants characterized them as probably damaging and disease-causing. Structural modeling of the variants predicted that they probably cause protein structural differentiation. In conclusion, we describe two unrelated Cypriot families with JNCL. Both families had variants in the CLN6 gene; however, they presented with slightly different symptoms, and notably none of the patients has loss of vision. In silico prediction and structural analyses indicate that both variants are most likely pathogenic.
Collapse
Affiliation(s)
- Paschalis Nicolaou
- Department of Neurogenetics, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus.,Cyprus School of Molecular Medicine, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| | - George A Tanteles
- Department of Clinical Genetics and Genomics, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus.,Cyprus School of Molecular Medicine, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| | - Christina Votsi
- Department of Neurogenetics, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus.,Cyprus School of Molecular Medicine, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| | - Eleni Zamba-Papanicolaou
- Department of Neuroepidemiology, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus.,Cyprus School of Molecular Medicine, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| | - Savvas S Papacostas
- Department of Neurobiology, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus.,Cyprus School of Molecular Medicine, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| | - Kyproula Christodoulou
- Department of Neurogenetics, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus.,Cyprus School of Molecular Medicine, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| | - Yiolanda-Panayiota Christou
- Department of Neurobiology, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus.,Cyprus School of Molecular Medicine, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| |
Collapse
|
6
|
Morsy A, Carmona AV, Trippier PC. Patient-Derived Induced Pluripotent Stem Cell Models for Phenotypic Screening in the Neuronal Ceroid Lipofuscinoses. Molecules 2021; 26:molecules26206235. [PMID: 34684815 PMCID: PMC8538546 DOI: 10.3390/molecules26206235] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 10/08/2021] [Accepted: 10/11/2021] [Indexed: 11/16/2022] Open
Abstract
Batten disease or neuronal ceroid lipofuscinosis (NCL) is a group of rare, fatal, inherited neurodegenerative lysosomal storage disorders. Numerous genes (CLN1–CLN8, CLN10–CLN14) were identified in which mutations can lead to NCL; however, the underlying pathophysiology remains elusive. Despite this, the NCLs share some of the same features and symptoms but vary in respect to severity and onset of symptoms by age. Some common symptoms include the progressive loss of vision, mental and motor deterioration, epileptic seizures, premature death, and in the rare adult-onset, dementia. Currently, all forms of NCL are fatal, and no curative treatments are available. Induced pluripotent stem cells (iPSCs) can differentiate into any cell type of the human body. Cells reprogrammed from a patient have the advantage of acquiring disease pathogenesis along with recapitulation of disease-associated phenotypes. They serve as practical model systems to shed new light on disease mechanisms and provide a phenotypic screening platform to enable drug discovery. Herein, we provide an overview of available iPSC models for a number of different NCLs. More specifically, we highlight findings in these models that may spur target identification and drug development.
Collapse
Affiliation(s)
- Ahmed Morsy
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Nebraska Medical Center, Omaha, NE 68106, USA; (A.M.); (A.V.C.)
| | - Angelica V. Carmona
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Nebraska Medical Center, Omaha, NE 68106, USA; (A.M.); (A.V.C.)
| | - Paul C. Trippier
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Nebraska Medical Center, Omaha, NE 68106, USA; (A.M.); (A.V.C.)
- Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE 68106, USA
- UNMC Center for Drug Discovery, University of Nebraska Medical Center, Omaha, NE 68106, USA
- Correspondence:
| |
Collapse
|
7
|
Golikova PI, Petukhova DA, Sukhomyasova AL, Nikolaeva TY, Gurinova EE, Ivanova RN, Maksimova NR. [Clinical and genetic description of neuronal ceroid lipofuscinosis 6 type in the yakut family]. Zh Nevrol Psikhiatr Im S S Korsakova 2021; 121:71-76. [PMID: 34481439 DOI: 10.17116/jnevro202112108171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Neuronal ceroid lipofuscinosis type 6 (NCL 6) is a rare progressive neurodegenerative disease that belongs to the group of lysosomal storage diseases. A clinical and genetic description of NCL 6 in a Yakut family was carried out. The proband and her sibling showed characteristic clinical signs, including myoclonic epilepsy, ataxia, psychomotor regression, dementia, and visual impairment. The onset of the disease in the age range from 3-4 years. The disease is caused by the frameshift mutation c.396dupT (p.Val133CysfsTer18) in exon 4 of the CLN6 in a homozygous state, which was detected using targeted next generation sequencing. Diagnosis of NCL is difficult due to the pronounced genetic heterogeneity of the disease, as well as the similarity with other hereditary metabolic diseases in clinical manifestations. The method of DNA diagnostics of NCL type 6 using NGS and direct sequencing according to Sanger has been introduced into the practice of medical genetic counseling.
Collapse
Affiliation(s)
- P I Golikova
- Ammosov North-Eastern Federal University, Yakutsk, Russia
| | - D A Petukhova
- Ammosov North-Eastern Federal University, Yakutsk, Russia
| | - A L Sukhomyasova
- Ammosov North-Eastern Federal University, Yakutsk, Russia.,Republic Hospital No. 1 - National Center of Medicine, Yakutsk, Russia
| | - T Ya Nikolaeva
- Ammosov North-Eastern Federal University, Yakutsk, Russia
| | - E E Gurinova
- Republic Hospital No. 1 - National Center of Medicine, Yakutsk, Russia
| | - R N Ivanova
- Ammosov North-Eastern Federal University, Yakutsk, Russia.,Republic Hospital No. 1 - National Center of Medicine, Yakutsk, Russia
| | - N R Maksimova
- Ammosov North-Eastern Federal University, Yakutsk, Russia
| |
Collapse
|
8
|
Shiro Y, Yamashita A, Watanabe K, Yamazaki T. CLN6's luminal tail-mediated functional interference between CLN6 mutants as a novel pathomechanism for the neuronal ceroid lipofuscinoses. Biomed Res 2021; 42:129-138. [PMID: 34380921 DOI: 10.2220/biomedres.42.129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
CLN6 (Ceroid Lipofuscinosis, Neuronal, 6) is a 311-amino acid protein spanning the endoplasmic reticulum membrane. Mutations in CLN6 are linked to CLN6 disease, a hereditary neurodegenerative disorder categorized into the neuronal ceroid lipofuscinoses. CLN6 disease is an autosomal recessive disorder and individuals affected with this disease have two identical (homozygous) or two distinct (compound heterozygous) CLN6 mutant alleles. Little has been known about CLN6's physiological roles and the disease mechanism. We recently found that CLN6 prevents protein aggregate formation, pointing to impaired CLN6's anti-aggregate activity as a cause for the disease. To comprehensively understand the pathomechanism, overall anti-aggregate activity derived from two different CLN6 mutants needs to be investigated, considering patients compound heterozygous for CLN6 alleles. We focused on mutant combinations involving the S132CfsX18 (132fsX) prematurely terminated protein, produced from the most frequent mutation in CLN6. The 132fsX mutant nullified anti-aggregate activity of the P299L CLN6 missense mutant but not of wild-type CLN6. Wild-type CLN6's resistance to the 132fsX mutant was abolished by replacement of amino acids 297-301, including Pro297 and Pro299, with five alanine residues. Given that removal of CLN6's C-terminal fifteen amino acids 297-311 (luminal tail) did not affect the resistance, we suggested that CLN6's luminal tail, when unleashed from Pro297/299-mediated conformational constraints, is improperly positioned by the 132fsX mutant, thereby blocking the induction of anti- aggregate activity. We here reveal a novel mechanism for dissipating CLN6 mutants' residual functions, providing an explanation for the compound heterozygosity-driven pathogenesis.
Collapse
Affiliation(s)
- Yuki Shiro
- Department of Molecular Cell Biology and Medicine, Graduate School of Biomedical Sciences, Tokushima University
| | - Arisa Yamashita
- Department of Molecular Cell Biology and Medicine, Graduate School of Biomedical Sciences, Tokushima University
| | - Kana Watanabe
- Department of Molecular Cell Biology and Medicine, Graduate School of Biomedical Sciences, Tokushima University
| | - Tetsuo Yamazaki
- Department of Molecular Cell Biology and Medicine, Graduate School of Biomedical Sciences, Tokushima University
| |
Collapse
|
9
|
LOU T, HUANG Y, DONG M. [Genetic study of a family of neuronal ceroid lipofuscinosis caused by a heterozygous mutation of CLN6 gene]. Zhejiang Da Xue Xue Bao Yi Xue Ban 2019; 48:373-377. [PMID: 31901039 PMCID: PMC8800761 DOI: 10.3785/j.issn.1008-9292.2019.08.04] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Accepted: 04/15/2019] [Indexed: 06/10/2023]
Abstract
OBJECTIVE To analyze the genetic cause of a family with autosomal recessive neuronal ceroid lipofuscinoses (NCL). METHODS The proband was screened for mutations within the coding region of the candidate genes through high-throughput targeted sequencing. Potential causative mutations were verified by PCR and Sanger sequencing in the proband and his parents. RT-PCR and TA clone sequencing were performed to investigate whether the mRNAs were abnormally spliced. RESULTS The sequencing results revealed compound heterozygous mutations of CLN6:c.486+2T>C and c.486+4A>T, which were respectively inherited from his parents. RT-PCR and TA cloning sequencing suggested that the mRNAs were abnormally spliced in two forms due to both mutations. CONCLUSIONS The compound heterozygous mutations of CLN6:c.486+2T>C and c.486+4A>T are possibly the genetic causes of the NCL family. Detection of the novel mutation has extended mutation spectrum of CLN6.
Collapse
Affiliation(s)
| | | | - Minyue DONG
- 董旻岳(1964—), 男, 博士, 主任医师, 博士生导师, 主要从事生殖遗传学研究; E-mail:
;
https://orcid.org/0000-0002-4344-7924
| |
Collapse
|
10
|
Ren XT, Wang XH, Ding CH, Shen X, Zhang H, Zhang WH, Li JW, Ren CH, Fang F. Next-Generation Sequencing Analysis Reveals Novel Pathogenic Variants in Four Chinese Siblings With Late-Infantile Neuronal Ceroid Lipofuscinosis. Front Genet 2019; 10:370. [PMID: 31105743 PMCID: PMC6494930 DOI: 10.3389/fgene.2019.00370] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Accepted: 04/08/2019] [Indexed: 12/24/2022] Open
Abstract
Neuronal Ceroid Lipofuscinoses (NCLs) are progressive degenerative diseases mainly affect brain and retina. They are characterized by accumulation of autofluorescent storage material, mitochondrial ATPase subunit C, or sphingolipid activator proteins A and D in lysosomes of most cells. Heterogenous storage material in NCLs is not completely disease-specific. Most of CLN proteins and their natural substrates are not well-characterized. Studies have suggested variants of Late-Infantile NCLs (LINCLs) include the major type CLN2 and minor types CLN5, CLN6, CLN7, and CLN8. Therefore, combination of clinical and molecular analysis has become a more effective diagnosis method. We studied 4 late-infantile NCL siblings characterized by seizures, ataxia as early symptoms, followed by progressive regression in intelligence and behavior, but mutations are located in different genes. Symptoms and progression of 4 types of LINCLs are compared. Pathology of LINCLs is also discussed. We performed Nest-Generation Sequencing on these phenotypically similar families. Three novel variants c.1551+1insTGAT in TPP1, c.244G>T in CLN6, c.554-5A>G in MFSD8 were identified. Potential outcome of the mutations in structure and function of proteins are studied. In addition, we observed some common and unique clinical features of Chinese LINCL patient as compared with those of Western patients, which greatly improved our understanding of the LINCLs.
Collapse
Affiliation(s)
- Xiao-Tun Ren
- Department of Neurology, National Centre for Children's Health, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Xiao-Hui Wang
- Department of Neurology, National Centre for Children's Health, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Chang-Hong Ding
- Department of Neurology, National Centre for Children's Health, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | | | | | - Wei-Hua Zhang
- Department of Neurology, National Centre for Children's Health, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Jiu-Wei Li
- Department of Neurology, National Centre for Children's Health, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Chang-Hong Ren
- Department of Neurology, National Centre for Children's Health, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Fang Fang
- Department of Neurology, National Centre for Children's Health, Beijing Children's Hospital, Capital Medical University, Beijing, China
| |
Collapse
|
11
|
Vaz C, Reales-Calderon JA, Pitarch A, Vellosillo P, Trevisan M, Hernáez ML, Monteoliva L, Gil C. Enrichment of ATP Binding Proteins Unveils Proteomic Alterations in Human Macrophage Cell Death, Inflammatory Response, and Protein Synthesis after Interaction with Candida albicans. J Proteome Res 2019; 18:2139-2159. [PMID: 30985132 DOI: 10.1021/acs.jproteome.9b00032] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Macrophages are involved in the primary human response to Candida albicans. After pathogen recognition, signaling pathways are activated, leading to the production of cytokines, chemokines, and antimicrobial peptides. ATP binding proteins are crucial for this regulation. Here, a quantitative proteomic and phosphoproteomic approach was carried out for the study of human macrophage ATP-binding proteins after interaction with C. albicans. From a total of 547 nonredundant quantified proteins, 137 were ATP binding proteins and 59 were detected as differentially abundant. From the differentially abundant ATP-binding proteins, 6 were kinases (MAP2K2, SYK, STK3, MAP3K2, NDKA, and SRPK1), most of them involved in signaling pathways. Furthermore, 85 phosphopeptides were quantified. Macrophage proteomic alterations including an increase of protein synthesis with a consistent decrease in proteolysis were observed. Besides, macrophages showed changes in proteins of endosomal trafficking together with mitochondrial proteins, including some involved in the response to oxidative stress. Regarding cell death mechanisms, an increase of antiapoptotic over pro-apoptotic signals is suggested. Furthermore, a high pro-inflammatory response was detected, together with no upregulation of key mi-RNAs involved in the negative feedback of this response. These findings illustrate a strategy to deepen the knowledge of the complex interactions between the host and the clinically important pathogen C. albicans.
Collapse
Affiliation(s)
- Catarina Vaz
- Departamento de Microbiologı́a y Parasitología, Facultad de Farmacia , Universidad Complutense de Madrid , 28040 Madrid , Spain.,Instituto Ramón y Cajal de Investigación Sanitaria IRYCIS , 28034 Madrid , Spain
| | - Jose Antonio Reales-Calderon
- Departamento de Microbiologı́a y Parasitología, Facultad de Farmacia , Universidad Complutense de Madrid , 28040 Madrid , Spain.,Instituto Ramón y Cajal de Investigación Sanitaria IRYCIS , 28034 Madrid , Spain
| | - Aida Pitarch
- Departamento de Microbiologı́a y Parasitología, Facultad de Farmacia , Universidad Complutense de Madrid , 28040 Madrid , Spain.,Instituto Ramón y Cajal de Investigación Sanitaria IRYCIS , 28034 Madrid , Spain
| | - Perceval Vellosillo
- Departamento de Microbiologı́a y Parasitología, Facultad de Farmacia , Universidad Complutense de Madrid , 28040 Madrid , Spain
| | - Marco Trevisan
- Laboratorio de Proteómica Cardiovascular , Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC) , 28029 Madrid , Spain
| | - María Luisa Hernáez
- Unidad de Proteómica , Universidad Complutense de Madrid , 28040 Madrid , Spain
| | - Lucía Monteoliva
- Departamento de Microbiologı́a y Parasitología, Facultad de Farmacia , Universidad Complutense de Madrid , 28040 Madrid , Spain.,Instituto Ramón y Cajal de Investigación Sanitaria IRYCIS , 28034 Madrid , Spain
| | - Concha Gil
- Departamento de Microbiologı́a y Parasitología, Facultad de Farmacia , Universidad Complutense de Madrid , 28040 Madrid , Spain.,Instituto Ramón y Cajal de Investigación Sanitaria IRYCIS , 28034 Madrid , Spain.,Unidad de Proteómica , Universidad Complutense de Madrid , 28040 Madrid , Spain
| |
Collapse
|