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Yuan L, Yu X, Xiao H, Deng S, Xia H, Xu H, Yang Y, Deng H. Identification of novel compound heterozygous variants in the DNAH1 gene of a Chinese family with left-right asymmetry disorder. Front Mol Biosci 2023; 10:1190162. [PMID: 37457836 PMCID: PMC10345202 DOI: 10.3389/fmolb.2023.1190162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 06/19/2023] [Indexed: 07/18/2023] Open
Abstract
Most internal organs in humans and other vertebrates exhibit striking left-right asymmetry in position and structure. Variation of normal organ positioning results in left-right asymmetry disorders and presents as internal organ reversal or randomization. Up to date, at least 82 genes have been identified as the causative genetic factors of left-right asymmetry disorders. This study sought to discover potential pathogenic variants responsible for left-right asymmetry disorder present in a Han-Chinese family using whole exome sequencing combined with Sanger sequencing. Novel compound heterozygous variants, c.5690A>G (p.Asn1897Ser) and c.7759G>A (p.Val2587Met), in the dynein axonemal heavy chain 1 gene (DNAH1), were found in the proband and absent in unaffected family members. Conservation analysis has shown that the variants affect evolutionarily conserved residues, which may impact the tertiary structure of the DNAH1 protein. The novel compound heterozygous variants may potentially bear responsibility for left-right asymmetry disorder, which results from a perturbation of left-right axis coordination at the earliest embryonic development stages. This study broadens the variant spectrum of left-right asymmetry disorders and may be helpful for genetic counseling and healthcare management for the diagnosed individual, and promotes a greater understanding of the pathophysiology.
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Affiliation(s)
- Lamei Yuan
- Health Management Center, The Third Xiangya Hospital, Central South University, Changsha, China
- Center for Experimental Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
- Disease Genome Research Center, Central South University, Changsha, China
- Department of Neurology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Xuehui Yu
- Health Management Center, The Third Xiangya Hospital, Central South University, Changsha, China
- Center for Experimental Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Heng Xiao
- Health Management Center, The Third Xiangya Hospital, Central South University, Changsha, China
- Center for Experimental Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Sheng Deng
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, China
| | - Hong Xia
- Department of Emergency, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Hongbo Xu
- Center for Experimental Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Yan Yang
- Department of Neurology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Hao Deng
- Health Management Center, The Third Xiangya Hospital, Central South University, Changsha, China
- Center for Experimental Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
- Disease Genome Research Center, Central South University, Changsha, China
- Department of Neurology, The Third Xiangya Hospital, Central South University, Changsha, China
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Wang Y, Song W, Zhou S, Chang S, Chang J, Tian J, Zhang L, Li J, Che G. The genomic and transcriptome characteristics of lung adenocarcinoma patients with previous breast cancer. BMC Cancer 2022; 22:618. [PMID: 35668376 PMCID: PMC9171992 DOI: 10.1186/s12885-022-09727-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 05/25/2022] [Indexed: 02/08/2023] Open
Abstract
Background Breast cancer and lung cancer are the top two malignancies in the female population and the number of patients with breast cancer and subsequent primary lung cancer has increased significantly in recent years. However, the unique molecular characteristics of this group of patients remains unclear. Purpose To identify the genomic and transcriptome characteristics of primary lung adenocarcinoma patients with previous breast cancer by comparison with single primary lung adenocarcinoma (SPLA) patients. Methods The tumor and normal pulmonary tissue specimens of ten primary pulmonary adenocarcinoma patients with previous breast cancer (multiple primary cancer, MPC) and ten SPLA patients were prospectively collected. The whole exome sequencing (WES) and RNA sequencing (RNA-seq) were performed to analyze the gene mutation and expression differences between MPC and SPC patients. Results The results of WES indicated that the mutations of TRIM73, DLX6 and CNGB1 only existed in MPC patients. The results of RNA-seq manifested the occurrence of second primary lung adenocarcinoma in breast cancer patients was closely associated with cytokine-cytokine receptor action, autophagy, PI3L-Akt, cAMP and calcium ion signaling pathways. Besides, the expression levels of FGF10 and VEGFA genes were significantly increased in MPC patients. Conclusion The occurrence of second primary lung adenocarcinoma may be related to the cytokine-cytokine receptor action, autophagy, PI3L-Akt, cAMP and calcium ion signaling pathways. Furthermore, the mutations of TRIM73, DLX6 and CNGB1 and high expression of FGF10 and VEGFA might play an important role in the development of lung adenocarcinoma in breast cancer patients. However, more in-depth investigations are needed to verify above findings. Supplementary Information The online version contains supplementary material available at 10.1186/s12885-022-09727-6.
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Affiliation(s)
- Yan Wang
- Department of Thoracic Surgery, West China Hospital, Sichuan University, Guoxuexiang No. 37, Chengdu, 610041, China
| | - Wenpeng Song
- Department of Thoracic Surgery, West China Hospital, Sichuan University, Guoxuexiang No. 37, Chengdu, 610041, China
| | - Sicheng Zhou
- Department of Thoracic Surgery, West China Hospital, Sichuan University, Guoxuexiang No. 37, Chengdu, 610041, China
| | - Shuai Chang
- Department of Thoracic Surgery, West China Hospital, Sichuan University, Guoxuexiang No. 37, Chengdu, 610041, China
| | - Junke Chang
- Department of Thoracic Surgery, West China Hospital, Sichuan University, Guoxuexiang No. 37, Chengdu, 610041, China
| | - Jie Tian
- Department of Thoracic Surgery, West China Hospital, Sichuan University, Guoxuexiang No. 37, Chengdu, 610041, China
| | - Liming Zhang
- Department of Thoracic Surgery, West China Hospital, Sichuan University, Guoxuexiang No. 37, Chengdu, 610041, China
| | - Jue Li
- Department of Thoracic Surgery, West China Hospital, Sichuan University, Guoxuexiang No. 37, Chengdu, 610041, China
| | - Guowei Che
- Department of Thoracic Surgery, West China Hospital, Sichuan University, Guoxuexiang No. 37, Chengdu, 610041, China.
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Novel MFSD8 Variants in a Chinese Family with Nonsyndromic Macular Dystrophy. J Ophthalmol 2021; 2021:6684045. [PMID: 34457359 PMCID: PMC8387190 DOI: 10.1155/2021/6684045] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 07/04/2021] [Accepted: 07/05/2021] [Indexed: 11/25/2022] Open
Abstract
Purpose To identify the molecular etiology of a Chinese family with nonsyndromic macular dystrophy. Methods Ophthalmic examinations were performed, and genomic DNA was extracted from available family members. Whole exome sequencing of two members (the proband and her unaffected mother) and Sanger sequencing in available family members were performed to screen potential pathogenic variants. Results Novel compound heterozygous variants, c.1066C>T (p.Pro356Ser) and c.1102+2T>C, in the major facilitator superfamily domain containing 8 gene (MFSD8) were suspected to be involved in this family's macular dystrophy phenotype. The novel c.1066C>T variant in the MFSD8 gene probably resulted in substitution of serine for proline at the 356th residue and was predicted to be “uncertain significance” through in silico analyses. The novel c.1102+2T>C variant in the MFSD8 gene was likely to affect the splicing form and predicted to be “pathogenic.” Conclusion The novel compound heterozygous variants, c.1066C>T (p.Pro356Ser) and c.1102+2T>C, in the MFSD8 gene are likely responsible for the isolated macular dystrophy phenotype in this family. This study enlarged the MFSD8 gene mutant spectrum and might provide more accurate genetic counseling for this family.
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Nassisi M, Smirnov VM, Solis Hernandez C, Mohand‐Saïd S, Condroyer C, Antonio A, Kühlewein L, Kempf M, Kohl S, Wissinger B, Nasser F, Ragi SD, Wang N, Sparrow JR, Greenstein VC, Michalakis S, Mahroo OA, Ba‐Abbad R, Michaelides M, Webster AR, Degli Esposti S, Saffren B, Capasso J, Levin A, Hauswirth WW, Dhaenens C, Defoort‐Dhellemmes S, Tsang SH, Zrenner E, Sahel J, Petersen‐Jones SM, Zeitz C, Audo I. CNGB1-related rod-cone dystrophy: A mutation review and update. Hum Mutat 2021; 42:641-666. [PMID: 33847019 PMCID: PMC8218941 DOI: 10.1002/humu.24205] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 03/26/2021] [Accepted: 04/08/2021] [Indexed: 12/29/2022]
Abstract
Cyclic nucleotide-gated channel β1 (CNGB1) encodes the 240-kDa β subunit of the rod photoreceptor cyclic nucleotide-gated ion channel. Disease-causing sequence variants in CNGB1 lead to autosomal recessive rod-cone dystrophy/retinitis pigmentosa (RP). We herein present a comprehensive review and analysis of all previously reported CNGB1 sequence variants, and add 22 novel variants, thereby enlarging the spectrum to 84 variants in total, including 24 missense variants (two of which may also affect splicing), 21 nonsense, 19 splicing defects (7 at noncanonical positions), 10 small deletions, 1 small insertion, 1 small insertion-deletion, 7 small duplications, and 1 gross deletion. According to the American College of Medical Genetics and Genomics classification criteria, 59 variants were considered pathogenic or likely pathogenic and 25 were variants of uncertain significance. In addition, we provide further phenotypic data from 34 CNGB1-related RP cases, which, overall, are in line with previous findings suggesting that this form of RP has long-term retention of useful central vision despite the early onset of night blindness, which is valuable for patient counseling, but also has implications for it being considered a priority target for gene therapy trials.
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Affiliation(s)
- Marco Nassisi
- Sorbonne Université, Institut National de la Santé et de la Recherche Médicale, Centre National de la Recherche ScientifiqueInstitut de la VisionParisFrance
- Centre Hospitalier National d'Ophtalmologie des Quinze‐Vingts, INSERM‐DGOS CIC1423ParisFrance
- Department of Clinical Sciences and Community HealthUniversity of MilanMilanItaly
- Ophthalmological Unit, Fondazione IRCCS Ca' GrandaOspedale Maggiore PoliclinicoMilanItaly
| | - Vasily M. Smirnov
- Sorbonne Université, Institut National de la Santé et de la Recherche Médicale, Centre National de la Recherche ScientifiqueInstitut de la VisionParisFrance
- Exploration de la vision et Neuro‐Ophthalmologie, CHU de LilleLilleFrance
- Faculté de MédecineUniversité de LilleLilleFrance
| | - Cyntia Solis Hernandez
- Sorbonne Université, Institut National de la Santé et de la Recherche Médicale, Centre National de la Recherche ScientifiqueInstitut de la VisionParisFrance
| | - Saddek Mohand‐Saïd
- Centre Hospitalier National d'Ophtalmologie des Quinze‐Vingts, INSERM‐DGOS CIC1423ParisFrance
| | - Christel Condroyer
- Sorbonne Université, Institut National de la Santé et de la Recherche Médicale, Centre National de la Recherche ScientifiqueInstitut de la VisionParisFrance
| | - Aline Antonio
- Sorbonne Université, Institut National de la Santé et de la Recherche Médicale, Centre National de la Recherche ScientifiqueInstitut de la VisionParisFrance
| | - Laura Kühlewein
- University Eye Hospital, Centre for OphthalmologyUniversity of TübingenTübingenGermany
- Institute for Ophthalmic Research, Centre for OphthalmologyUniversity of TübingenTübingenGermany
| | - Melanie Kempf
- University Eye Hospital, Centre for OphthalmologyUniversity of TübingenTübingenGermany
| | - Susanne Kohl
- Institute for Ophthalmic Research, Centre for OphthalmologyUniversity of TübingenTübingenGermany
| | - Bernd Wissinger
- Institute for Ophthalmic Research, Centre for OphthalmologyUniversity of TübingenTübingenGermany
| | - Fadi Nasser
- University Eye Hospital, Centre for OphthalmologyUniversity of TübingenTübingenGermany
| | - Sara D. Ragi
- Department of OphthalmologyColumbia University, New YorkNew YorkUSA
| | - Nan‐Kai Wang
- Department of OphthalmologyColumbia University, New YorkNew YorkUSA
- College of MedicineChang Gung UniversityTaoyuanTaiwan
- Department of Ophthalmology, Chang Gung Memorial HospitalLinkou Medical CenterTaoyuanTaiwan
| | - Janet R. Sparrow
- Department of OphthalmologyColumbia University, New YorkNew YorkUSA
| | | | | | - Omar A. Mahroo
- Moorfields Eye HospitalLondonUK
- UCL Institute of Ophthalmology, University College LondonLondonUK
| | - Rola Ba‐Abbad
- Moorfields Eye HospitalLondonUK
- UCL Institute of Ophthalmology, University College LondonLondonUK
| | - Michel Michaelides
- Moorfields Eye HospitalLondonUK
- UCL Institute of Ophthalmology, University College LondonLondonUK
| | - Andrew R. Webster
- Moorfields Eye HospitalLondonUK
- UCL Institute of Ophthalmology, University College LondonLondonUK
| | - Simona Degli Esposti
- Moorfields Eye HospitalLondonUK
- UCL Institute of Ophthalmology, University College LondonLondonUK
| | - Brooke Saffren
- Philadelphia College of Osteopathic MedicinePhiladelphiaPennsylvaniaUSA
| | | | - Alex Levin
- Pediatric Ophthalmology and Ocular Genetics, Flaum Eye Institute, Pediatric Genetics, Golisano Children's HospitalUniversity of RochesterRochesterNew YorkUSA
| | | | - Claire‐Marie Dhaenens
- Univ. Lille, Inserm, CHU Lille, U1172‐LilNCog‐Lille Neuroscience & CognitionLilleFrance
| | | | - Stephen H. Tsang
- Department of OphthalmologyColumbia University, New YorkNew YorkUSA
- Jonas Children's Vision Care and Bernard & Shirlee Brown Glaucoma LaboratoryNew YorkNew YorkUSA
- Department of Pathology and Cell BiologyColumbia UniversityNew YorkNew YorkUSA
- Stem Cell Initiative (CSCI), Institute of Human Nutrition, Vagelos College of Physicians and SurgeonsNew YorkNew YorkUSA
| | - Eberhart Zrenner
- University Eye Hospital, Centre for OphthalmologyUniversity of TübingenTübingenGermany
| | - Jose‐Alain Sahel
- Sorbonne Université, Institut National de la Santé et de la Recherche Médicale, Centre National de la Recherche ScientifiqueInstitut de la VisionParisFrance
- Department of OphthalmologyThe University of Pittsburgh School of MedicinePittsburghPennsylvaniaUSA
- Fondation Ophtalmologique Adolphe de RothschildParisFrance
| | - Simon M. Petersen‐Jones
- Department of Small Animal Clinical SciencesMichigan State UniversityEast LansingMichiganUSA
| | - Christina Zeitz
- Sorbonne Université, Institut National de la Santé et de la Recherche Médicale, Centre National de la Recherche ScientifiqueInstitut de la VisionParisFrance
| | - Isabelle Audo
- Sorbonne Université, Institut National de la Santé et de la Recherche Médicale, Centre National de la Recherche ScientifiqueInstitut de la VisionParisFrance
- Centre Hospitalier National d'Ophtalmologie des Quinze‐Vingts, INSERM‐DGOS CIC1423ParisFrance
- University College London Institute of OphthalmologyLondonUK
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Abstract
We report the molecular basis of the largest Tunisian cohort with inherited retinal dystrophies (IRD) reported to date, identify disease-causing pathogenic variants and describe genotype-phenotype correlations. A subset of 26 families from a cohort of 73 families with clinical diagnosis of autosomal recessive IRD (AR-IRD) excluding Usher syndrome was analyzed by whole exome sequencing and autozygosity mapping. Causative pathogenic variants were identified in 50 families (68.4%), 42% of which were novel. The most prevalent pathogenic variants were observed in ABCA4 (14%) and RPE65, CRB1 and CERKL (8% each). 26 variants (8 novel and 18 known) in 19 genes were identified in 26 families (14 missense substitutions, 5 deletions, 4 nonsense pathogenic variants and 3 splice site variants), with further allelic heterogeneity arising from different pathogenic variants in the same gene. The most common phenotype in our cohort is retinitis pigmentosa (23%) and cone rod dystrophy (23%) followed by Leber congenital amaurosis (19.2%). We report the association of new disease phenotypes. This research was carried out in Tunisian patients with IRD in order to delineate the genetic population architecture.
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