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Longtine C, Eliason CM, Mishkind D, Lee C, Chiappone M, Goller F, Love J, Kingsley EP, Clarke JA, Tabin CJ. Homology and the evolution of vocal folds in the novel avian voice box. Curr Biol 2024; 34:461-472.e7. [PMID: 38183987 DOI: 10.1016/j.cub.2023.12.013] [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: 06/14/2023] [Revised: 08/29/2023] [Accepted: 12/06/2023] [Indexed: 01/08/2024]
Abstract
The origin of novel traits, those that are not direct modifications of a pre-existing ancestral structure, remains a fundamental problem in evolutionary biology. For example, little is known about the evolutionary and developmental origins of the novel avian vocal organ, the syrinx. Located at the tracheobronchial junction, the syrinx is responsible for avian vocalization, but it is unclear whether avian vocal folds are homologous to the laryngeal vocal folds in other tetrapods or convergently evolved. Here, we identify a core developmental program involved in avian vocal fold formation and infer the morphology of the syrinx of the ancestor of modern birds. We find that this ancestral syrinx had paired sound sources induced by a conserved developmental pathway and show that shifts in these signals correlate with syringeal diversification. We show that, despite being derived from different developmental tissues, vocal folds in the syrinx and larynx have similar tissue composition and are established through a strikingly similar developmental program, indicating that co-option of an ancestral developmental program facilitated the origin of vocal folds in the avian syrinx.
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Affiliation(s)
- Charlie Longtine
- Department of Genetics, Harvard Medical School, Boston, MA 02115, USA
| | - Chad M Eliason
- The Jackson School of Geosciences and Department of Integrative Biology, The University of Texas at Austin, Austin, TX 78712, USA
| | - Darcy Mishkind
- Department of Genetics, Harvard Medical School, Boston, MA 02115, USA
| | - ChangHee Lee
- Department of Genetics, Harvard Medical School, Boston, MA 02115, USA
| | - Michael Chiappone
- The Jackson School of Geosciences and Department of Integrative Biology, The University of Texas at Austin, Austin, TX 78712, USA
| | - Franz Goller
- School of Biological Sciences, University of Utah, Salt Lake City, UT 84112, USA; Department of Zoophysiology, University of Münster, 48149 Münster, Germany
| | - Jay Love
- School of Biological Sciences, University of Utah, Salt Lake City, UT 84112, USA
| | - Evan P Kingsley
- Department of Genetics, Harvard Medical School, Boston, MA 02115, USA.
| | - Julia A Clarke
- The Jackson School of Geosciences and Department of Integrative Biology, The University of Texas at Austin, Austin, TX 78712, USA.
| | - Clifford J Tabin
- Department of Genetics, Harvard Medical School, Boston, MA 02115, USA.
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2
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Zhao LK, Zhao YB, Zhang PX. High-throughput metabolomics discovers metabolite biomarkers and insights the protective mechanism of schisandrin B on myocardial injury rats. J Sep Sci 2020; 44:717-725. [PMID: 33247873 DOI: 10.1002/jssc.202000875] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 11/16/2020] [Accepted: 11/23/2020] [Indexed: 12/26/2022]
Abstract
Schisandrin B has been proved to possess anti-inflammatory and anti-endoplasmic effects, could improve cardiac function, inhibit apoptosis, and reduce inflammation after ischemic injury. However, the detailed metabolic mechanism and potential pathways of Schisandrin B effects on myocardial injury are unclear. Metabolomics could yield in-depth mechanistic insights and explore the potential therapeutic effect of natural products. In this study, the preparation of doxorubicin-induced myocardial injury rat model for evaluation of Schisandrin B on viral myocarditis sequelae related pathological changes and its mechanism. The metabolite profiling of myocardial injury rats was performed through ultra-high performance liquid chromatography combined with mass spectrometry combined with pattern recognition approaches and pathway analysis. A total of 15 metabolites (nine in positive ion mode and six in negative ion mode) were considered as potential biomarkers of myocardial injury, and these metabolites may correlate with the regulation of Schisandrin B treatment. A total of six metabolic pathways are closely related to Schisandrin B treatment, including glycerophospholipid metabolism, sphingolipid metabolism, purine metabolism, etc. This study revealed the potential biomarkers and metabolic network pathways of myocardial injury, and illuminated the protective mechanism of Schisandrin B on myocardial injury.
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Affiliation(s)
- Ling-Kun Zhao
- School of Basic Medicine, Jiamusi University, Jiamusi, Heilongjiang, P. R. China
| | - Yun-Bo Zhao
- First Affiliated Hospital, Jiamusi University, Jiamusi, Heilongjiang, P. R. China
| | - Peng-Xia Zhang
- School of Basic Medicine, Jiamusi University, Jiamusi, Heilongjiang, P. R. China
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3
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Zhuang S, Fu Y, Li J, Li M, Hu X, Zhu J, Tong M. MicroRNA-375 overexpression disrupts cardiac development of Zebrafish (Danio rerio) by targeting notch2. PROTOPLASMA 2020; 257:1309-1318. [PMID: 32468186 DOI: 10.1007/s00709-020-01490-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Accepted: 02/13/2020] [Indexed: 06/11/2023]
Abstract
MicroRNAs are small noncoding RNAs that are important for proper cardiac development. In our previous study of fetuses with ventricular septal defects, we discovered that microRNA-375 (miR-375) is obviously upregulated compared with that in healthy controls. Our study also confirmed that miR-375 is crucial for cardiomyocyte differentiation. This research mainly focused on the biological significance and mechanism of miR-375 using a zebrafish model. We injected zebrafish embryos with 1-2 nl of a miR-375 mimic at various concentrations (0/2/4/8 μM) or with negative control. The deformation and mortality rates were separately assessed. The different expression levels of miR-375 and related genes were examined by qRT-PCR, and luciferase assays and in situ hybridization were used to clarify the mechanism of miR-375 during embryonic development. Overexpression of miR-375 disrupted the cardiac development of zebrafish embryos. Disruption of miR-375 led to a decreased heart rate, pericardial edema, and abnormal cardiac looping. Various genes involved in cardiac development were downregulated due to the overexpression of miR-375. Moreover, the NOTCH signaling pathway was affected, and the luciferase reporter gene assays confirmed notch2, which was predicted by bioinformatics analysis, as the target gene of miR-375. Our findings demonstrated that the overexpression of miR-375 is detrimental to embryonic development, including cardiac development, and can partially simulate a multisystemic disorder. MiR-375 has an important role during cardiac morphogenesis of zebrafish embryos by targeting notch2, indicating its potential as a diagnostic marker.
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Affiliation(s)
- Sisi Zhuang
- Department of Child Health Care, Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, 123rd Tianfei Street, Mochou Road, Nanjing, 210004, China
- Department of Pediatrics, The First Affiliated Hospital, Nanjing Medical University, Jiangsu Province, Nanjing, 210029, China
| | - Yanrong Fu
- Department of Pediatrics, Tongren Hospital, Shanghai Jiao Tong University School of Medicine, 1111 XianXia Road, Shanghai, 200336, China
| | - Jingyun Li
- Department of Child Health Care, Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, 123rd Tianfei Street, Mochou Road, Nanjing, 210004, China
| | - Mengmeng Li
- Department of Pediatrics, Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, 123rd Tianfei Street, Mochou Road, Nanjing, 210004, China
| | - Xiaoshan Hu
- Department of Pediatrics, Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, 123rd Tianfei Street, Mochou Road, Nanjing, 210004, China
| | - Jingai Zhu
- Department of Pediatrics, Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, 123rd Tianfei Street, Mochou Road, Nanjing, 210004, China.
| | - Meiling Tong
- Department of Child Health Care, Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, 123rd Tianfei Street, Mochou Road, Nanjing, 210004, China.
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4
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Liu L, Fei F, Zhang R, Wu F, Yang Q, Wang F, Sun S, Zhao H, Li Q, Wang L, Wang Y, Gui Y, Wang X. Combinatorial genetic replenishments in myocardial and outflow tract tissues restore heart function in tnnt2 mutant zebrafish. Biol Open 2019; 8:bio.046474. [PMID: 31796423 PMCID: PMC6918781 DOI: 10.1242/bio.046474] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Cardiac muscle troponin T (Tnnt2) mediates muscle contraction in response to calcium ion dynamics, and Tnnt2 mutations are associated with multiple types of cardiomyopathy. Here, we employed a zebrafish model to investigate the genetic replenishment strategies of using conditional and inducible promoters to rescue the deficiencies in the heart. tnnt2a mutations were induced in zebrafish via the CRISPR/Cas9 technique, and the mutants displayed heart arrest and dilated cardiomyopathy-like phenotypes. We first utilized the classic myocardial promoter of the myl7 and TetOn inducible system to restore tnnt2a expression in myocardial tissue in tnnt2a mutant zebrafish. However, this attempt failed to recover normal heart function and circulation, although heart pumping was partially restored. Further analyses via both RNA-seq and immunofluorescence indicated that Tnnt2a, which was also expressed in a novel group of myl7-negative smooth muscle cells on the outflow tract (OFT), was indispensably responsible for the normal mechanical dynamics of OFT. Lastly, tnnt2 expression induced by OFT cells in addition to the myocardial cells successfully rescued heart function and circulation in tnnt2a mutant zebrafish. Together, our results reveal the significance of OFT expression of Tnnt2 for cardiac function and demonstrate zebrafish larva as a powerful and convenient in vivo platform for studying cardiomyopathy and the relevant therapeutic strategies.
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Affiliation(s)
- Lian Liu
- Department of Cardiology, Children's Hospital of Fudan University, Shanghai 201102, China
| | - Fei Fei
- Cancer Metabolism Laboratory, Cancer Institute, Fudan University Shanghai Cancer Center, Shanghai 200032, China.,Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai 230002, China
| | - Ranran Zhang
- Department of Pediatrics, the Affiliated Hospital of Qingdao University, Qingdao, Shangdong 266003, China
| | - Fang Wu
- Department of Cardiology, Children's Hospital of Fudan University, Shanghai 201102, China
| | - Qian Yang
- Department of Cardiology, Children's Hospital of Fudan University, Shanghai 201102, China
| | - Feng Wang
- Department of Cardiology, Children's Hospital of Fudan University, Shanghai 201102, China
| | - Shaoyang Sun
- Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai 230002, China
| | - Hui Zhao
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
| | - Qiang Li
- Translational Medical Center for Development and Disease, Shanghai Key Laboratory of Birth Defect, Institute of Pediatrics, Children's Hospital of Fudan University, Shanghai 201102, China
| | - Lei Wang
- Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai 230002, China
| | - Youhua Wang
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
| | - Yonghao Gui
- Department of Cardiology, Children's Hospital of Fudan University, Shanghai 201102, China
| | - Xu Wang
- Cancer Metabolism Laboratory, Cancer Institute, Fudan University Shanghai Cancer Center, Shanghai 200032, China .,Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai 230002, China
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5
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Mitchell CA, Dasgupta S, Zhang S, Stapleton HM, Volz DC. Disruption of Nuclear Receptor Signaling Alters Triphenyl Phosphate-Induced Cardiotoxicity in Zebrafish Embryos. Toxicol Sci 2019. [PMID: 29529285 DOI: 10.1093/toxsci/kfy037] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Triphenyl phosphate (TPHP) is an unsubstituted aryl phosphate ester used as a flame retardant and plasticizer within the United States. Using zebrafish as a model, the objectives of this study were to rely on (1) mRNA-sequencing to uncover pathways disrupted following embryonic TPHP exposure and (2) high-content screening to identify nuclear receptor ligands that enhance or mitigate TPHP-induced cardiotoxicity. Based on mRNA-sequencing, TPHP exposure from 24 to 72-h postfertilization (hpf) resulted in a concentration-dependent increase in the number of transcripts significantly affected at 72 hpf, and pathway analysis revealed that 5 out of 9 nuclear receptor pathways were associated with the retinoid X receptor (RXR). Based on a screen of 74 unique nuclear receptor ligands as well as follow-up experiments, 2 compounds-ciglitazone (a peroxisome proliferator-activated receptor gamma, or PPARγ, agonist) and fenretinide (a pan-retinoic acid receptor, or RAR, agonist)-reliably mitigated TPHP-induced cardiotoxicity in the absence of effects on TPHP uptake or metabolism. As these data suggested that TPHP may be activating RXR (a heterodimer for both RARs and PPARγ), we coexposed embryos to HX 531-a pan-RXR antagonist-from 24 to 72 hpf and, contrary to our hypothesis, found that coexposure to HX 531 significantly enhanced TPHP-induced cardiotoxicity. Using a luciferase reporter assay, we also found that TPHP did not activate nor inhibit chimeric human RXRα, RXRβ, or RXRγ, suggesting that TPHP does not directly bind nor interact with RXRs. Overall, our data suggest that TPHP may interfere with RXR-dependent pathways involved in cardiac development.
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Affiliation(s)
- Constance A Mitchell
- Environmental Toxicology Graduate Program.,Department of Environmental Sciences, University of California, Riverside, California
| | - Subham Dasgupta
- Department of Environmental Sciences, University of California, Riverside, California
| | - Sharon Zhang
- Division of Environmental Sciences and Policy, Duke University, Durham, North Carolina
| | - Heather M Stapleton
- Division of Environmental Sciences and Policy, Duke University, Durham, North Carolina
| | - David C Volz
- Department of Environmental Sciences, University of California, Riverside, California
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6
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Li J, Zhao Y, He L, Huang Y, Yang X, Yu L, Zhao Q, Dong X. Znfl1s are essential for patterning the anterior-posterior axis of zebrafish posterior hindbrain by acting as direct target genes of retinoic acid. Mech Dev 2018; 155:27-33. [PMID: 30472261 DOI: 10.1016/j.mod.2018.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 10/29/2018] [Accepted: 11/22/2018] [Indexed: 10/27/2022]
Abstract
RA (retinoic acid) signaling is essential for the patterning the hindbrain of vertebrates. Although hundreds of potential RA targets genes are identified, the ones other than hox genes playing roles in patterning anterior-posterior axis of hindbrain by mediating RA signaling remains largely unknown. Previously, we reported that znfl1s play essential roles in the formation of posterior neuroectoderm in zebrafish embryos. Here, we revealed that znfl1s play a critical role in patterning the posterior axis of hindbrain by maintaining the homeostasis of RA signaling in zebrafish embryos. Knocking down znfl1s shortened the length of the posterior hindbrain in a similar way of reducing RA signaling in zebrafish embryos and the defective posterior hindbrain was effectively rescued by elevating RA signaling. By performing mutagenesis assays and chromatin immunoprecipitation assays on the promoter of znfl1s, we demonstrated that znfl1s are direct target genes of RA to mediate RA signaling through a functional DR1 RA response element. Taken together, our results showed that Znfl1s are essential for patterning the anterior-posterior axis development of posterior hindbrain by acting as direct target genes of RA signaling.
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Affiliation(s)
- Jingyun Li
- Maternal and Child Health Medical Institute, Women's Hospital of Nanjing Medical University (Nanjing Maternity and Child Health Care Hospital), Nanjing, China
| | - Yingmin Zhao
- Department of Pediatric, Jingjiang People's Hospital Affiliated to Yangzhou University, Jingjiang 214500, China
| | - Luqingqing He
- Model Animal Research Center, Nanjing University, Nanjing 210061, China
| | - Yun Huang
- Department of Pediatric, Jingjiang People's Hospital Affiliated to Yangzhou University, Jingjiang 214500, China
| | - Xiaojing Yang
- Department of Pediatric, Jingjiang People's Hospital Affiliated to Yangzhou University, Jingjiang 214500, China
| | - Lingling Yu
- Department of Pediatric, Jingjiang People's Hospital Affiliated to Yangzhou University, Jingjiang 214500, China
| | - Qingshun Zhao
- Model Animal Research Center, Nanjing University, Nanjing 210061, China.
| | - Xiaohua Dong
- Department of Pediatric, Jingjiang People's Hospital Affiliated to Yangzhou University, Jingjiang 214500, China.
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7
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Yue Y, Jiang M, He L, Zhang Z, Zhang Q, Gu C, Liu M, Li N, Zhao Q. The transcription factor Foxc1a in zebrafish directly regulates expression of nkx2.5, encoding a transcriptional regulator of cardiac progenitor cells. J Biol Chem 2017; 293:638-650. [PMID: 29162723 DOI: 10.1074/jbc.ra117.000414] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Revised: 11/17/2017] [Indexed: 01/19/2023] Open
Abstract
Cardiogenesis is a tightly controlled biological process required for formation of a functional heart. The transcription factor Foxc1 not only plays a crucial role in outflow tract development in mice, but is also involved in cardiac structure formation and normal function in humans. However, the molecular mechanisms by which Foxc1 controls cardiac development remain poorly understood. Previously, we reported that zebrafish embryos deficient in foxc1a, an ortholog of mammalian Foxc1, display pericardial edemas and die 9-10 days postfertilization. To further investigate Foxc1a's role in zebrafish cardiogenesis and identify its downstream target genes during early heart development, we comprehensively analyzed the cardiovascular phenotype of foxc1a-null zebrafish embryos. Our results confirmed that foxc1a-null mutants exhibit disrupted cardiac morphology, structure, and function. Performing transcriptome analysis on the foxc1a mutants, we found that the expression of the cardiac progenitor marker gene nkx2.5 was significantly decreased, but the expression of germ layer-patterning genes was unaffected. Dual-fluorescence in situ hybridization assays revealed that foxc1a and nkx2.5 are co-expressed in the anterior lateral plate mesoderm at the somite stage. Chromatin immunoprecipitation and promoter truncation assays disclosed that Foxc1a regulates nkx2.5 expression via direct binding to two noncanonical binding sites in the proximal nkx2.5 promoter. Moreover, functional rescue experiments revealed that developmental stage-specific nkx2.5 overexpression partially rescues the cardiac defects of the foxc1a-null embryos. Taken together, our results indicate that during zebrafish cardiogenesis, Foxc1a is active directly upstream of nkx2.5.
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Affiliation(s)
- Yunyun Yue
- From the Model Animal Research Center, Ministry of Education Key Laboratory of Model Animal for Disease Study, Nanjing University, 12 Xuefu Road, Pukou High-tech Development Zone, Nanjing 210061, China
| | - Mingyang Jiang
- From the Model Animal Research Center, Ministry of Education Key Laboratory of Model Animal for Disease Study, Nanjing University, 12 Xuefu Road, Pukou High-tech Development Zone, Nanjing 210061, China
| | - Luqingqing He
- From the Model Animal Research Center, Ministry of Education Key Laboratory of Model Animal for Disease Study, Nanjing University, 12 Xuefu Road, Pukou High-tech Development Zone, Nanjing 210061, China
| | - Zhaojunjie Zhang
- From the Model Animal Research Center, Ministry of Education Key Laboratory of Model Animal for Disease Study, Nanjing University, 12 Xuefu Road, Pukou High-tech Development Zone, Nanjing 210061, China
| | - Qinxin Zhang
- From the Model Animal Research Center, Ministry of Education Key Laboratory of Model Animal for Disease Study, Nanjing University, 12 Xuefu Road, Pukou High-tech Development Zone, Nanjing 210061, China
| | - Chun Gu
- From the Model Animal Research Center, Ministry of Education Key Laboratory of Model Animal for Disease Study, Nanjing University, 12 Xuefu Road, Pukou High-tech Development Zone, Nanjing 210061, China
| | - Meijing Liu
- From the Model Animal Research Center, Ministry of Education Key Laboratory of Model Animal for Disease Study, Nanjing University, 12 Xuefu Road, Pukou High-tech Development Zone, Nanjing 210061, China
| | - Nan Li
- From the Model Animal Research Center, Ministry of Education Key Laboratory of Model Animal for Disease Study, Nanjing University, 12 Xuefu Road, Pukou High-tech Development Zone, Nanjing 210061, China
| | - Qingshun Zhao
- From the Model Animal Research Center, Ministry of Education Key Laboratory of Model Animal for Disease Study, Nanjing University, 12 Xuefu Road, Pukou High-tech Development Zone, Nanjing 210061, China
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8
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Scott CA, Marsden AN, Rebagliati MR, Zhang Q, Chamling X, Searby CC, Baye LM, Sheffield VC, Slusarski DC. Nuclear/cytoplasmic transport defects in BBS6 underlie congenital heart disease through perturbation of a chromatin remodeling protein. PLoS Genet 2017; 13:e1006936. [PMID: 28753627 PMCID: PMC5550010 DOI: 10.1371/journal.pgen.1006936] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Revised: 08/09/2017] [Accepted: 07/20/2017] [Indexed: 01/31/2023] Open
Abstract
Mutations in BBS6 cause two clinically distinct syndromes, Bardet-Biedl syndrome (BBS), a syndrome caused by defects in cilia transport and function, as well as McKusick-Kaufman syndrome, a genetic disorder characterized by congenital heart defects. Congenital heart defects are rare in BBS, and McKusick-Kaufman syndrome patients do not develop retinitis pigmentosa. Therefore, the McKusick-Kaufman syndrome allele may highlight cellular functions of BBS6 distinct from the presently understood functions in the cilia. In support, we find that the McKusick-Kaufman syndrome disease-associated allele, BBS6H84Y; A242S, maintains cilia function. We demonstrate that BBS6 is actively transported between the cytoplasm and nucleus, and that BBS6H84Y; A242S, is defective in this transport. We developed a transgenic zebrafish with inducible bbs6 to identify novel binding partners of BBS6, and we find interaction with the SWI/SNF chromatin remodeling protein Smarcc1a (SMARCC1 in humans). We demonstrate that through this interaction, BBS6 modulates the sub-cellular localization of SMARCC1 and find, by transcriptional profiling, similar transcriptional changes following smarcc1a and bbs6 manipulation. Our work identifies a new function for BBS6 in nuclear-cytoplasmic transport, and provides insight into the disease mechanism underlying the congenital heart defects in McKusick-Kaufman syndrome patients. To understand how mutations in one gene can cause two distinct human syndromes (McKusick-Kaufman syndrome and Bardet-Bield syndrome), we investigated the cellular functions of the implicated gene BBS6. We found that BBS6 is actively transported between the cytoplasm and nucleus, and this interaction is disrupted in McKusick-Kaufman syndrome, but not Bardet-Biedl syndrome. We find that by manipulating BBS6, we can affect another protein, SMARCC1, which has a direct role in regulating gene expression. When we profiled these changes in gene expression, we find that many genes, which can be directly linked to the symptoms of McKusick-Kaufman syndrome, are affected. Therefore, our data support that the nuclear-cytoplasmic transport defect of BBS6, through disruption of proteins controlling gene expression, cause the symptoms observed in McKusick-Kaufman syndrome patients.
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Affiliation(s)
- Charles Anthony Scott
- Department of Biology, University of Iowa, Iowa City, Iowa, United States of America
| | - Autumn N. Marsden
- Department of Biology, University of Iowa, Iowa City, Iowa, United States of America
- Interdisciplinary Graduate Program in Genetics, University of Iowa, Iowa City, Iowa, United States of America
| | - Michael R. Rebagliati
- Department of Biology, University of Iowa, Iowa City, Iowa, United States of America
| | - Qihong Zhang
- Department of Pediatrics and Ophthalmology, Carver College of Medicine, University of Iowa, Iowa City, Iowa, United States of America
| | - Xitiz Chamling
- Department of Pediatrics and Ophthalmology, Carver College of Medicine, University of Iowa, Iowa City, Iowa, United States of America
| | - Charles C. Searby
- Department of Pediatrics and Ophthalmology, Carver College of Medicine, University of Iowa, Iowa City, Iowa, United States of America
| | - Lisa M. Baye
- Department of Biology, University of Iowa, Iowa City, Iowa, United States of America
| | - Val C. Sheffield
- Department of Pediatrics and Ophthalmology, Carver College of Medicine, University of Iowa, Iowa City, Iowa, United States of America
- Wynn Institute for Vision Research University of Iowa, Iowa City, Iowa, United States of America
| | - Diane C. Slusarski
- Department of Biology, University of Iowa, Iowa City, Iowa, United States of America
- Wynn Institute for Vision Research University of Iowa, Iowa City, Iowa, United States of America
- * E-mail:
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9
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Burggren WW, Dubansky B, Bautista NM. Cardiovascular Development in Embryonic and Larval Fishes. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/bs.fp.2017.09.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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