1
|
Miller KA, Cruz Walma DA, Pinkas DM, Tooze RS, Bufton JC, Richardson W, Manning CE, Hunt AE, Cros J, Hartill V, Parker MJ, McGowan SJ, Twigg SRF, Chalk R, Staunton D, Johnson D, Wilkie AOM, Bullock AN. BTB domain mutations perturbing KCTD15 oligomerisation cause a distinctive frontonasal dysplasia syndrome. J Med Genet 2024; 61:490-501. [PMID: 38296633 DOI: 10.1136/jmg-2023-109531] [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: 07/24/2023] [Accepted: 12/21/2023] [Indexed: 02/02/2024]
Abstract
INTRODUCTION KCTD15 encodes an oligomeric BTB domain protein reported to inhibit neural crest formation through repression of Wnt/beta-catenin signalling, as well as transactivation by TFAP2. Heterozygous missense variants in the closely related paralogue KCTD1 cause scalp-ear-nipple syndrome. METHODS Exome sequencing was performed on a two-generation family affected by a distinctive phenotype comprising a lipomatous frontonasal malformation, anosmia, cutis aplasia of the scalp and/or sparse hair, and congenital heart disease. Identification of a de novo missense substitution within KCTD15 led to targeted sequencing of DNA from a similarly affected sporadic patient, revealing a different missense mutation. Structural and biophysical analyses were performed to assess the effects of both amino acid substitutions on the KCTD15 protein. RESULTS A heterozygous c.310G>C variant encoding p.(Asp104His) within the BTB domain of KCTD15 was identified in an affected father and daughter and segregated with the phenotype. In the sporadically affected patient, a de novo heterozygous c.263G>A variant encoding p.(Gly88Asp) was present in KCTD15. Both substitutions were found to perturb the pentameric assembly of the BTB domain. A crystal structure of the BTB domain variant p.(Gly88Asp) revealed a closed hexameric assembly, whereas biophysical analyses showed that the p.(Asp104His) substitution resulted in a monomeric BTB domain likely to be partially unfolded at physiological temperatures. CONCLUSION BTB domain substitutions in KCTD1 and KCTD15 cause clinically overlapping phenotypes involving craniofacial abnormalities and cutis aplasia. The structural analyses demonstrate that missense substitutions act through a dominant negative mechanism by disrupting the higher order structure of the KCTD15 protein complex.
Collapse
Affiliation(s)
- Kerry A Miller
- MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - David A Cruz Walma
- Centre for Medicines Discovery, University of Oxford, Oxford, UK
- Cell Biology Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland, USA
| | - Daniel M Pinkas
- Centre for Medicines Discovery, University of Oxford, Oxford, UK
- Department of Biological Sciences, Universidad Loyola Andalucía, Seville, Spain
| | - Rebecca S Tooze
- MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - Joshua C Bufton
- Centre for Medicines Discovery, University of Oxford, Oxford, UK
| | | | | | - Alice E Hunt
- Centre for Medicines Discovery, University of Oxford, Oxford, UK
| | - Julien Cros
- Centre for Medicines Discovery, University of Oxford, Oxford, UK
| | - Verity Hartill
- Leeds Institute of Medical Research, University of Leeds, Leeds, UK
- Yorkshire Regional Genetics Service, Leeds Teaching Hospitals NHS Trust, Chapel Allerton Hospital, Leeds, UK
| | - Michael J Parker
- Sheffield Clinical Genomics Service, Sheffield Children's Hospital NHS Foundation Trust, Sheffield, UK
| | - Simon J McGowan
- MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - Stephen R F Twigg
- MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - Rod Chalk
- Centre for Medicines Discovery, University of Oxford, Oxford, UK
| | - David Staunton
- Department of Biochemistry, University of Oxford, Oxford, UK
| | - David Johnson
- Craniofacial Unit, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
| | - Andrew O M Wilkie
- MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
- Craniofacial Unit, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
| | - Alex N Bullock
- Centre for Medicines Discovery, University of Oxford, Oxford, UK
| |
Collapse
|
2
|
Balasco N, Esposito L, Smaldone G, Salvatore M, Vitagliano L. A Comprehensive Analysis of the Structural Recognition between KCTD Proteins and Cullin 3. Int J Mol Sci 2024; 25:1881. [PMID: 38339159 PMCID: PMC10856315 DOI: 10.3390/ijms25031881] [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: 12/22/2023] [Revised: 01/19/2024] [Accepted: 01/28/2024] [Indexed: 02/12/2024] Open
Abstract
KCTD ((K)potassium Channel Tetramerization Domain-containing) proteins constitute an emerging class of proteins involved in fundamental physio-pathological processes. In these proteins, the BTB domain, which represents the defining element of the family, may have the dual role of promoting oligomerization and favoring functionally important partnerships with different interactors. Here, by exploiting the potential of recently developed methodologies for protein structure prediction, we report a comprehensive analysis of the interactions of all KCTD proteins with their most common partner Cullin 3 (Cul3). The data here presented demonstrate the impressive ability of this approach to discriminate between KCTDs that interact with Cul3 and those that do not. Indeed, reliable and stable models of the complexes were only obtained for the 15 members of the family that are known to interact with Cul3. The generation of three-dimensional models for all KCTD-Cul3 complexes provides interesting clues on the determinants of the structural basis of this partnership as clear structural differences emerged between KCTDs that bind or do not bind Cul3. Finally, the availability of accurate three-dimensional models for KCTD-Cul3 interactions may be valuable for the ad hoc design and development of compounds targeting specific KCTDs that are involved in several common diseases.
Collapse
Affiliation(s)
- Nicole Balasco
- Institute of Molecular Biology and Pathology, CNR c/o Department Chemistry, Sapienza University of Rome, 00185 Rome, Italy
| | - Luciana Esposito
- Institute of Biostructures and Bioimaging, CNR, 80131 Naples, Italy;
| | | | | | - Luigi Vitagliano
- Institute of Biostructures and Bioimaging, CNR, 80131 Naples, Italy;
| |
Collapse
|
3
|
Niu C, Wen H, Wang S, Shu G, Wang M, Yi H, Guo K, Pan Q, Yin G. Potential prognosis and immunotherapy predictor TFAP2A in pan-cancer. Aging (Albany NY) 2024; 16:1021-1048. [PMID: 38265973 PMCID: PMC10866441 DOI: 10.18632/aging.205225] [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: 08/02/2023] [Accepted: 10/12/2023] [Indexed: 01/26/2024]
Abstract
BACKGROUND TFAP2A is critical in regulating the expression of various genes, affecting various biological processes and driving tumorigenesis and tumor development. However, the significance of TFAP2A in carcinogenesis processes remains obscure. METHODS In our study, we explored multiple databases including TCGA, GTEx, HPA, cBioPortal, TCIA, and other well-established databases for further analysis to expound TFAP2A expression, genetic alternations, and their relationship with the prognosis and cellular signaling network alternations. GO term and KEGG pathway enrichment analysis as well as GSEA were conducted to examine the common functions of TFAP2A. RT-qPCR, Western Blot and Dual Luciferase Reporter assay were employed to perform experimental validation. RESULTS TFAP2A mRNA expression level was upregulated and its genetic alternations were frequently present in most cancer types. The enrichment analysis results prompted us to investigate the changes in the tumor immune microenvironment further. We discovered that the expression of TFAP2A was significantly associated with the expression of immune checkpoint genes, immune subtypes, ESTIMATE scores, tumor-infiltrating immune cells, and the possible role of TFAP2A in predicting immunotherapy efficacy. In addition, high TFAP2A expression significantly correlated with several ICP genes, and promoted the expression of PD-L1 on mRNA and protein levels through regulating its expression at the transcriptional level. TFAP2A protein level was upregulated in fresh colon tumor tissue samples compared to that in the adjacent normal tissues, which essentially positively correlated with the expression of PD-L1. CONCLUSIONS Our study suggests that targeting TFAP2A may provide a novel and effective strategy for cancer treatment.
Collapse
Affiliation(s)
- Chenxi Niu
- Department of Pathology, Xiangya Hospital, School of Basic Medical Sciences, Central South University, Changsha, China
| | - Haixuan Wen
- Department of Pathology, Xiangya Hospital, School of Basic Medical Sciences, Central South University, Changsha, China
| | - Shutong Wang
- Xiangya Medical School, Central South University, Changsha, China
| | - Guang Shu
- Department of Pathology, Xiangya Hospital, School of Basic Medical Sciences, Central South University, Changsha, China
| | - Maonan Wang
- Department of Pathology, Xiangya Hospital, School of Basic Medical Sciences, Central South University, Changsha, China
| | - Hanxi Yi
- Department of Pathology, Xiangya Hospital, School of Basic Medical Sciences, Central South University, Changsha, China
| | - Ke Guo
- Department of Neurology, The Third Xiangya Hospital of Central South University, Changsha, China
| | - Qiong Pan
- Department of Obstetrics and Gynecology, The Third Xiangya Hospital of Central South University, Changsha, China
| | - Gang Yin
- Department of Pathology, Xiangya Hospital, School of Basic Medical Sciences, Central South University, Changsha, China
- China-Africa Research Center of Infectious Diseases, School of Basic Medical Sciences, Central South University, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China
| |
Collapse
|
4
|
Zhang H, Raymundo JR, Daly KE, Zhu W, Senapati B, Zhong H, Ahilan AR, Marneros AG. AP-2α/AP-2β Transcription Factors Are Key Regulators of Epidermal Homeostasis. J Invest Dermatol 2024:S0022-202X(24)00015-0. [PMID: 38237728 DOI: 10.1016/j.jid.2023.12.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 12/21/2023] [Accepted: 12/26/2023] [Indexed: 01/30/2024]
Abstract
AP-2 transcription factors regulate ectodermal development, but their roles in epidermal homeostasis in adult skin are unknown. We find that AP-2α is the predominant AP-2 family member in adult epidermis, followed by AP-2β. Through inactivation of AP-2α, AP-2β, or both in keratinocytes, we assessed the effects of a gradient of epidermal AP-2 activity on skin function. We find that (i) loss of AP-2β in keratinocytes is compensated for by AP-2α, (ii) loss of AP-2α impairs terminal keratinocyte differentiation and hair morphogenesis, and (iii) the combined loss of AP-2α/AP-2β results in more severe skin and hair abnormalities. Keratinocyte differentiation defects precede progressive neutrophilic skin inflammation. Inducible inactivation of AP-2α/AP-2β in the adult phenocopies these manifestations. Transcriptomic analyses of epidermis lacking AP-2α or AP-2α/AP-2β in keratinocytes demonstrate a terminal keratinocyte differentiation defect with upregulation of alarmin keratins and of several immune pathway regulators. Moreover, our analyses suggest a key role of reduced AP-2α-dependent gene expression of CXCL14 and the keratin 15 gene K15 as an early pathogenic event toward the manifestation of skin inflammation. Thus, AP-2α and AP-2β are critical regulators of epidermal homeostasis in adult skin.
Collapse
Affiliation(s)
- Hui Zhang
- Cutaneous Biology Research Center, Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, USA
| | - Jackelyn R Raymundo
- Cutaneous Biology Research Center, Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, USA
| | - Kathleen E Daly
- Cutaneous Biology Research Center, Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, USA
| | - Wenjuan Zhu
- Stanford Cardiovascular Institute, Stanford Univeristy, Stanford, California, USA
| | - Bill Senapati
- Cutaneous Biology Research Center, Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, USA
| | - Hanyu Zhong
- Cutaneous Biology Research Center, Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, USA
| | - Arjun R Ahilan
- Cutaneous Biology Research Center, Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, USA
| | - Alexander G Marneros
- Cutaneous Biology Research Center, Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, USA.
| |
Collapse
|
5
|
Raymundo JR, Zhang H, Smaldone G, Zhu W, Daly KE, Glennon BJ, Pecoraro G, Salvatore M, Devine WA, Lo CW, Vitagliano L, Marneros AG. KCTD1/KCTD15 complexes control ectodermal and neural crest cell functions, and their impairment causes aplasia cutis. J Clin Invest 2023; 134:e174138. [PMID: 38113115 PMCID: PMC10866662 DOI: 10.1172/jci174138] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 12/13/2023] [Indexed: 12/21/2023] Open
Abstract
Aplasia cutis congenita (ACC) is a congenital epidermal defect of the midline scalp and has been proposed to be due to a primary keratinocyte abnormality. Why it forms mainly at this anatomic site has remained a long-standing enigma. KCTD1 mutations cause ACC, ectodermal abnormalities, and kidney fibrosis, whereas KCTD15 mutations cause ACC and cardiac outflow tract abnormalities. Here, we found that KCTD1 and KCTD15 can form multimeric complexes and can compensate for each other's loss and that disease mutations are dominant negative, resulting in lack of KCTD1/KCTD15 function. We demonstrated that KCTD15 is critical for cardiac outflow tract development, whereas KCTD1 regulates distal nephron function. Combined inactivation of KCTD1/KCTD15 in keratinocytes resulted in abnormal skin appendages but not in ACC. Instead, KCTD1/KCTD15 inactivation in neural crest cells resulted in ACC linked to midline skull defects, demonstrating that ACC is not caused by a primary defect in keratinocytes but is a secondary consequence of impaired cranial neural crest cells, giving rise to midline cranial suture cells that express keratinocyte-promoting growth factors. Our findings explain the clinical observations in patients with KCTD1 versus KCTD15 mutations, establish KCTD1/KCTD15 complexes as critical regulators of ectodermal and neural crest cell functions, and define ACC as a neurocristopathy.
Collapse
Affiliation(s)
- Jackelyn R. Raymundo
- Cutaneous Biology Research Center, Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, USA
| | - Hui Zhang
- Cutaneous Biology Research Center, Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, USA
| | | | - Wenjuan Zhu
- Stanford Cardiovascular Institute, Stanford University School of Medicine, Stanford, California, USA
| | - Kathleen E. Daly
- Cutaneous Biology Research Center, Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, USA
| | - Benjamin J. Glennon
- Developmental Biology Department, John G. Rangos Sr. Research Center, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | | | | | - William A. Devine
- Developmental Biology Department, John G. Rangos Sr. Research Center, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Cecilia W. Lo
- Developmental Biology Department, John G. Rangos Sr. Research Center, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Luigi Vitagliano
- Institute of Biostructures and Bioimaging, Consiglio Nazionale delle Ricerche, Naples, Italy
| | - Alexander G. Marneros
- Cutaneous Biology Research Center, Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, USA
| |
Collapse
|
6
|
Zhang H, Raymundo J, Daly KE, Zhu W, Senapati B, Marneros AG. AP-2α/AP-2β transcription factors are key regulators of epidermal homeostasis. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.12.03.569763. [PMID: 38105942 PMCID: PMC10723278 DOI: 10.1101/2023.12.03.569763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2023]
Abstract
AP-2 transcription factors regulate ectodermal development but their roles for epidermal homeostasis in the adult skin are unknown. We find that AP-2α is the predominant AP-2 family member in adult epidermis, followed by AP-2β. Through inactivation of AP-2α, AP-2β, or both in keratinocytes we assessed the effects of a gradient of epidermal AP-2 activity on skin function. We find that (1) loss of AP-2β in keratinocytes is compensated for by AP-2α, (2) loss of AP-2α impairs terminal keratinocyte differentiation and hair morphogenesis, and (3) the combined loss of AP-2α/AP-2β results in more severe skin and hair abnormalities. Keratinocyte differentiation defects precede a progressive neutrophilic skin inflammation. Inducible inactivation of AP-2α/AP-2β in the adult phenocopies these manifestations. Transcriptomic analyses of epidermis lacking AP-2α or AP-2α/AP-2β in keratinocytes demonstrate a terminal keratinocyte differentiation defect with upregulation of alarmin keratins and of several immune pathway regulators. Moreover, our analyses suggest a key role of loss of AP-2α-dependent gene expression of CXCL14 and KRT15 as an early pathogenic event towards the manifestation of skin inflammation. Thus, AP-2α/AP-2β are critical regulators of epidermal homeostasis in the adult skin.
Collapse
Affiliation(s)
- Hui Zhang
- Cutaneous Biology Research Center, Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, 02129, USA
| | - Jackelyn Raymundo
- Cutaneous Biology Research Center, Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, 02129, USA
| | - Kathleen E. Daly
- Cutaneous Biology Research Center, Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, 02129, USA
| | - Wenjuan Zhu
- Cardiovascular Institute, Stanford University, Stanford, CA, 94305, USA
| | - Bill Senapati
- Cutaneous Biology Research Center, Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, 02129, USA
| | - Alexander G. Marneros
- Cutaneous Biology Research Center, Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, 02129, USA
| |
Collapse
|
7
|
Jeong Y, Oh AR, Jung YH, Gi H, Kim YU, Kim K. Targeting E3 ubiquitin ligases and their adaptors as a therapeutic strategy for metabolic diseases. Exp Mol Med 2023; 55:2097-2104. [PMID: 37779139 PMCID: PMC10618535 DOI: 10.1038/s12276-023-01087-w] [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: 05/01/2023] [Revised: 06/23/2023] [Accepted: 07/06/2023] [Indexed: 10/03/2023] Open
Abstract
Posttranslational modification of proteins via ubiquitination determines their activation, translocation, dysregulation, or degradation. This process targets a large number of cellular proteins, affecting all biological pathways involved in the cell cycle, development, growth, and differentiation. Thus, aberrant regulation of ubiquitination is likely associated with several diseases, including various types of metabolic diseases. Among the ubiquitin enzymes, E3 ubiquitin ligases are regarded as the most influential ubiquitin enzymes due to their ability to selectively bind and recruit target substrates for ubiquitination. Continued research on the regulatory mechanisms of E3 ligases and their adaptors in metabolic diseases will further stimulate the discovery of new targets and accelerate the development of therapeutic options for metabolic diseases. In this review, based on recent discoveries, we summarize new insights into the roles of E3 ubiquitin ligases and their adaptors in the pathogenesis of metabolic diseases by highlighting recent evidence obtained in both human and animal model studies.
Collapse
Affiliation(s)
- Yelin Jeong
- Department of Biomedical Sciences, College of Medicine, Inha University, Incheon, Republic of Korea
- Program in Biomedical Science & Engineering, Inha University, Incheon, Republic of Korea
- Research Center for Controlling Intercellular Communication (RCIC), College of Medicine, Inha University, Incheon, 22212, Republic of Korea
| | - Ah-Reum Oh
- Department of Biomedical Sciences, College of Medicine, Inha University, Incheon, Republic of Korea
- Program in Biomedical Science & Engineering, Inha University, Incheon, Republic of Korea
- Research Center for Controlling Intercellular Communication (RCIC), College of Medicine, Inha University, Incheon, 22212, Republic of Korea
| | - Young Hoon Jung
- Department of Biomedical Sciences, College of Medicine, Inha University, Incheon, Republic of Korea
- Program in Biomedical Science & Engineering, Inha University, Incheon, Republic of Korea
- Research Center for Controlling Intercellular Communication (RCIC), College of Medicine, Inha University, Incheon, 22212, Republic of Korea
| | - HyunJoon Gi
- Department of Biomedical Sciences, College of Medicine, Inha University, Incheon, Republic of Korea
- Program in Biomedical Science & Engineering, Inha University, Incheon, Republic of Korea
- Research Center for Controlling Intercellular Communication (RCIC), College of Medicine, Inha University, Incheon, 22212, Republic of Korea
| | - Young Un Kim
- Department of Biomedical Sciences, College of Medicine, Inha University, Incheon, Republic of Korea
- Program in Biomedical Science & Engineering, Inha University, Incheon, Republic of Korea
- Research Center for Controlling Intercellular Communication (RCIC), College of Medicine, Inha University, Incheon, 22212, Republic of Korea
| | - KyeongJin Kim
- Department of Biomedical Sciences, College of Medicine, Inha University, Incheon, Republic of Korea.
- Program in Biomedical Science & Engineering, Inha University, Incheon, Republic of Korea.
- Research Center for Controlling Intercellular Communication (RCIC), College of Medicine, Inha University, Incheon, 22212, Republic of Korea.
| |
Collapse
|
8
|
Nguyen TK, Petrikas M, Chambers BE, Wingert RA. Principles of Zebrafish Nephron Segment Development. J Dev Biol 2023; 11:jdb11010014. [PMID: 36976103 PMCID: PMC10052950 DOI: 10.3390/jdb11010014] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 03/08/2023] [Accepted: 03/15/2023] [Indexed: 03/29/2023] Open
Abstract
Nephrons are the functional units which comprise the kidney. Each nephron contains a number of physiologically unique populations of specialized epithelial cells that are organized into discrete domains known as segments. The principles of nephron segment development have been the subject of many studies in recent years. Understanding the mechanisms of nephrogenesis has enormous potential to expand our knowledge about the basis of congenital anomalies of the kidney and urinary tract (CAKUT), and to contribute to ongoing regenerative medicine efforts aimed at identifying renal repair mechanisms and generating replacement kidney tissue. The study of the zebrafish embryonic kidney, or pronephros, provides many opportunities to identify the genes and signaling pathways that control nephron segment development. Here, we describe recent advances of nephron segment patterning and differentiation in the zebrafish, with a focus on distal segment formation.
Collapse
Affiliation(s)
- Thanh Khoa Nguyen
- Department of Biological Sciences, Center for Stem Cells and Regenerative Medicine, Center for Zebrafish Research, Boler-Parseghian Center for Rare and Neglected Diseases, Warren Center for Drug Discovery, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Madeline Petrikas
- Department of Biological Sciences, Center for Stem Cells and Regenerative Medicine, Center for Zebrafish Research, Boler-Parseghian Center for Rare and Neglected Diseases, Warren Center for Drug Discovery, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Brooke E Chambers
- Department of Biological Sciences, Center for Stem Cells and Regenerative Medicine, Center for Zebrafish Research, Boler-Parseghian Center for Rare and Neglected Diseases, Warren Center for Drug Discovery, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Rebecca A Wingert
- Department of Biological Sciences, Center for Stem Cells and Regenerative Medicine, Center for Zebrafish Research, Boler-Parseghian Center for Rare and Neglected Diseases, Warren Center for Drug Discovery, University of Notre Dame, Notre Dame, IN 46556, USA
| |
Collapse
|
9
|
The regulatory role of AP-2β in monoaminergic neurotransmitter systems: insights on its signalling pathway, linked disorders and theragnostic potential. Cell Biosci 2022; 12:151. [PMID: 36076256 PMCID: PMC9461128 DOI: 10.1186/s13578-022-00891-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 08/28/2022] [Indexed: 11/10/2022] Open
Abstract
AbstractMonoaminergic neurotransmitter systems play a central role in neuronal function and behaviour. Dysregulation of these systems gives rise to neuropsychiatric and neurodegenerative disorders with high prevalence and societal burden, collectively termed monoamine neurotransmitter disorders (MNDs). Despite extensive research, the transcriptional regulation of monoaminergic neurotransmitter systems is not fully explored. Interestingly, certain drugs that act on these systems have been shown to modulate central levels of the transcription factor AP-2 beta (AP-2β, gene: TFAP2Β). AP-2β regulates multiple key genes within these systems and thereby its levels correlate with monoamine neurotransmitters measures; yet, its signalling pathways are not well understood. Moreover, although dysregulation of TFAP2Β has been associated with MNDs, the underlying mechanisms for these associations remain elusive. In this context, this review addresses AP-2β, considering its basic structural aspects, regulation and signalling pathways in the controlling of monoaminergic neurotransmitter systems, and possible mechanisms underpinning associated MNDS. It also underscores the significance of AP-2β as a potential diagnostic biomarker and its potential and limitations as a therapeutic target for specific MNDs as well as possible pharmaceutical interventions for targeting it. In essence, this review emphasizes the role of AP-2β as a key regulator of the monoaminergic neurotransmitter systems and its importance for understanding the pathogenesis and improving the management of MNDs.
Collapse
|
10
|
AlphaFold-Predicted Structures of KCTD Proteins Unravel Previously Undetected Relationships among the Members of the Family. Biomolecules 2021; 11:biom11121862. [PMID: 34944504 PMCID: PMC8699099 DOI: 10.3390/biom11121862] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 11/26/2021] [Accepted: 12/07/2021] [Indexed: 02/07/2023] Open
Abstract
One of the most striking features of KCTD proteins is their involvement in apparently unrelated yet fundamental physio-pathological processes. Unfortunately, comprehensive structure–function relationships for this protein family have been hampered by the scarcity of the structural data available. This scenario is rapidly changing due to the release of the protein three-dimensional models predicted by AlphaFold (AF). Here, we exploited the structural information contained in the AF database to gain insights into the relationships among the members of the KCTD family with the aim of facilitating the definition of the structural and molecular basis of key roles that these proteins play in many biological processes. The most important finding that emerged from this investigation is the discovery that, in addition to the BTB domain, the vast majority of these proteins also share a structurally similar domain in the C-terminal region despite the absence of general sequence similarities detectable in this region. Using this domain as reference, we generated a novel and comprehensive structure-based pseudo-phylogenetic tree that unraveled previously undetected similarities among the protein family. In particular, we generated a new clustering of the KCTD proteins that will represent a solid ground for interpreting their many functions.
Collapse
|
11
|
Smaldone G, Coppola L, Pane K, Franzese M, Beneduce G, Parasole R, Menna G, Vitagliano L, Salvatore M, Mirabelli P. KCTD15 deregulation is associated with alterations of the NF-κB signaling in both pathological and physiological model systems. Sci Rep 2021; 11:18237. [PMID: 34521919 PMCID: PMC8440651 DOI: 10.1038/s41598-021-97775-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Accepted: 08/24/2021] [Indexed: 12/13/2022] Open
Abstract
Like other KCTD proteins, KCTD15 is involved in important albeit distinct biological processes as cancer, neural crest formation, and obesity. Here, we characterized the role of KCTD15 in different physiological/pathological states to gain insights into its diversified function(s). The silencing of KCTD15 in MLL-rearranged leukemia models induced attenuation of the NF-κB pathway associated with a downregulation of pIKK-β and pIKB-α. Conversely, the activation of peripheral blood T cells upon PMA/ionomycin stimulation remarkably upregulated KCTD15 and, simultaneously, pIKK-β and pIKB-α. Moreover, a significant upregulation of KCTD15 was also observed in CD34 hematopoietic stem/progenitor cells where the NF-κB pathway is physiologically activated. The association between KCTD15 upregulation and increased NF-κB signaling was confirmed by luciferase assay as well as KCTD15 and IKK-β proximity ligation and immunoprecipitation experiments. The observed upregulation of IKK-β by KCTD15 provides a novel and intriguing interpretative key for understanding the protein function in a wide class of physiological/pathological conditions ranging from neuronal development to cancer and obesity/diabetes.
Collapse
Affiliation(s)
| | - Luigi Coppola
- IRCCS SDN, Via E. Gianturco 113, 80143, Naples, Italy
| | - Katia Pane
- IRCCS SDN, Via E. Gianturco 113, 80143, Naples, Italy
| | | | - Giuliana Beneduce
- Department of Pediatric Hemato-Oncology, Santobono-Pausilipon Hospital, 80129, Naples, Italy
| | - Rosanna Parasole
- Department of Pediatric Hemato-Oncology, Santobono-Pausilipon Hospital, 80129, Naples, Italy
| | - Giuseppe Menna
- Department of Pediatric Hemato-Oncology, Santobono-Pausilipon Hospital, 80129, Naples, Italy
| | - Luigi Vitagliano
- Institute of Biostructures and Bioimaging, C.N.R., Via Mezzocannone n.16, 80134, Naples, Italy.
| | | | | |
Collapse
|
12
|
Zhang P, Fu Y, Zhang R, Shang P, Zhang H, Zhang B. Association of KCTD15 gene with fat deposition in pigs. J Anim Physiol Anim Nutr (Berl) 2021; 106:537-544. [PMID: 34106484 DOI: 10.1111/jpn.13587] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 04/12/2021] [Accepted: 05/11/2021] [Indexed: 12/27/2022]
Abstract
KCTD15 is associated with body mass index and fat deposition in humans, mice and chickens. However, the function of KCTD15 in pig fat deposition remains unclear. In this study, we cloned and analysed the cDNA sequence of porcine KCTD15. The full length of the mRNA sequence of KCTD15 is 4,091 bp, encoding 283 amino acids. The protein is hydrophilic, it has a relative molecular mass of about 31.9 kDa and an isoelectric point of 7.09 with no signal peptide sequence or transmembrane structure. Expression analysis showed that KCTD15 expression level was significantly higher in the tissues of Large White pigs (LW) than in those of Tibetan pigs (TP) and Diannan Small-ear pigs (DN) at 6 months of age, whereas its expression level in embryonic tissues of LW at 60 days was lower than that in tissues of TP and Wujin pigs (WJ). In pig primary adipocytes, the expression level of KCTD15 is high in the early stage of differentiation and gradually decreases in later stages. Additionally, the single-nucleotide polymorphism (SNP) site T-2030C (T/C mutation, located 2,030 bp upstream of the start codon) showed a dominant allele T with high promoter activity in the LW population and a dominant allele C in the TP and WJ populations. Our results indicate that KCTD15 is involved in pig fat deposition and that T-2030C is an important regulatory site for transcriptional activity, affecting fat deposition.
Collapse
Affiliation(s)
- Pan Zhang
- National Engineering Laboratory for Animal Breeding, China Agricultural University, Beijing, China
| | - Yu Fu
- National Engineering Laboratory for Animal Breeding, China Agricultural University, Beijing, China
| | - Ran Zhang
- National Engineering Laboratory for Animal Breeding, China Agricultural University, Beijing, China
| | - Peng Shang
- College of Animal Science, Tibet Agriculture and Animal Husbandry College, Linzhi, China
| | - Hao Zhang
- National Engineering Laboratory for Animal Breeding, China Agricultural University, Beijing, China
| | - Bo Zhang
- National Engineering Laboratory for Animal Breeding, China Agricultural University, Beijing, China
| |
Collapse
|
13
|
Liu J, Liu Z, Li M, Tang W, Pratap UP, Luo Y, Altwegg KA, Li X, Zou Y, Zhu H, Sareddy GR, Viswanadhapalli S, Vadlamudi RK. Interaction of transcription factor AP-2 gamma with proto-oncogene PELP1 promotes tumorigenesis by enhancing RET signaling. Mol Oncol 2021; 15:1146-1161. [PMID: 33269540 PMCID: PMC8024722 DOI: 10.1002/1878-0261.12871] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Revised: 10/10/2020] [Accepted: 11/30/2020] [Indexed: 01/15/2023] Open
Abstract
A significant proportion of estrogen receptor-positive (ER+) breast cancer (BC) initially responds to endocrine therapy but eventually evolves into therapy-resistant BC. Transcription factor AP-2 gamma (TFAP2C) is a known regulator of ER activity, and high expression of TFAP2C is associated with a decreased response to endocrine therapies. PELP1 is a nuclear receptor coregulator, commonly overexpressed in BC, and its levels are correlated with poorer survival. In this study, we identified PELP1 as a novel interacting protein of TFAP2C. RNA-seq analysis of PELP1 knockdown BC cells followed by transcription factor motif prediction pointed to TFAP2C being enriched in PELP1-regulated genes. Gene set enrichment analysis (GSEA) revealed that the TFAP2C-PELP1 axis induced a subset of common genes. Reporter gene assays confirmed PELP1 functions as a coactivator of TFAP2C. Mechanistic studies showed that PELP1-mediated changes in histone methylation contributed to increased expression of the TFAP2C target gene RET. Furthermore, the TFAP2C-PELP1 axis promoted the activation of the RET signaling pathway, which contributed to downstream activation of AKT and ERK pathways in ER+ BC cells. Concomitantly, knockdown of PELP1 attenuated these effects mediated by TFAP2C. Overexpression of TFAP2C contributed to increased cell proliferation and therapy resistance in ER+ BC models, while knockdown of PELP1 mitigated these effects. Utilizing ZR75-TFAP2C xenografts with or without PELP1 knockdown, we provided genetic evidence that endogenous PELP1 is essential for TFAP2C-driven BC progression in vivo. Collectively, our studies demonstrated that PELP1 plays a critical role in TFAP2C transcriptional and tumorigenic functions in BC and blocking the PELP1-TFAP2C axis could have utility for treating therapy resistance.
Collapse
Affiliation(s)
- Junhao Liu
- UT Health San Antonio Long School of MedicineDepartment of Obstetrics and GynecologyUT Health San AntonioTXUSA
- Department of OncologyXiangya HospitalCentral South UniversityHunanChina
| | - Zexuan Liu
- UT Health San Antonio Long School of MedicineDepartment of Obstetrics and GynecologyUT Health San AntonioTXUSA
- Department of OncologyXiangya HospitalCentral South UniversityHunanChina
| | - Mengxing Li
- UT Health San Antonio Long School of MedicineDepartment of Obstetrics and GynecologyUT Health San AntonioTXUSA
- Department of Respiratory MedicineXiangya HospitalCentral South UniversityHunanChina
| | - Weiwei Tang
- UT Health San Antonio Long School of MedicineDepartment of Obstetrics and GynecologyUT Health San AntonioTXUSA
- Department of Obstetrics and GynecologyAffiliated Hospital of Integrated Traditional Chinese and Western MedicineNanjing University of Chinese MedicineChina
| | - Uday P. Pratap
- UT Health San Antonio Long School of MedicineDepartment of Obstetrics and GynecologyUT Health San AntonioTXUSA
| | - Yiliao Luo
- UT Health San Antonio Long School of MedicineDepartment of Obstetrics and GynecologyUT Health San AntonioTXUSA
- Department of General SurgeryXiangya HospitalCentral South UniversityHunanChina
| | - Kristin A. Altwegg
- UT Health San Antonio Long School of MedicineDepartment of Obstetrics and GynecologyUT Health San AntonioTXUSA
- UT Health San Antonio Mays Cancer Center‐ MD Anderson Cancer CenterUT Health San AntonioTXUSA
| | - Xiaonan Li
- UT Health San Antonio Long School of MedicineDepartment of Obstetrics and GynecologyUT Health San AntonioTXUSA
| | - Yi Zou
- Greehey Children's Cancer Research InstituteUT Health San AntonioTXUSA
| | - Hong Zhu
- Department of OncologyXiangya HospitalCentral South UniversityHunanChina
| | - Gangadhara R. Sareddy
- UT Health San Antonio Long School of MedicineDepartment of Obstetrics and GynecologyUT Health San AntonioTXUSA
- UT Health San Antonio Mays Cancer Center‐ MD Anderson Cancer CenterUT Health San AntonioTXUSA
| | - Suryavathi Viswanadhapalli
- UT Health San Antonio Long School of MedicineDepartment of Obstetrics and GynecologyUT Health San AntonioTXUSA
- UT Health San Antonio Mays Cancer Center‐ MD Anderson Cancer CenterUT Health San AntonioTXUSA
| | - Ratna K. Vadlamudi
- UT Health San Antonio Long School of MedicineDepartment of Obstetrics and GynecologyUT Health San AntonioTXUSA
- UT Health San Antonio Mays Cancer Center‐ MD Anderson Cancer CenterUT Health San AntonioTXUSA
| |
Collapse
|
14
|
The Sumo proteome of proliferating and neuronal-differentiating cells reveals Utf1 among key Sumo targets involved in neurogenesis. Cell Death Dis 2021; 12:305. [PMID: 33753728 PMCID: PMC7985304 DOI: 10.1038/s41419-021-03590-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 03/02/2021] [Accepted: 03/03/2021] [Indexed: 11/28/2022]
Abstract
Post-translational modification by covalent attachment of the Small ubiquitin-like modifier (Sumo) polypeptide regulates a multitude of processes in vertebrates. Despite demonstrated roles of Sumo in the development and function of the nervous system, the identification of key factors displaying a sumoylation-dependent activity during neurogenesis remains elusive. Through a SILAC (stable isotope labeling by/with amino acids in cell culture)-based proteomic approach, we have identified the Sumo proteome of the model cell line P19 under proliferation and neuronal differentiation conditions. More than 300 proteins were identified as putative Sumo targets differentially associated with one or the other condition. A group of proteins of interest were validated and investigated in functional studies. Among these, Utf1 was revealed as a new Sumo target. Gain-of-function experiments demonstrated marked differences between the effects on neurogenesis of overexpressing wild-type and sumoylation mutant versions of the selected proteins. While sumoylation of Prox1, Sall4a, Trim24, and Utf1 was associated with a positive effect on neurogenesis in P19 cells, sumoylation of Kctd15 was associated with a negative effect. Prox1, Sall4a, and Kctd15 were further analyzed in the vertebrate neural tube of living embryos, with similar results. Finally, a detailed analysis of Utf1 showed the sumoylation dependence of Utf1 function in controlling the expression of bivalent genes. Interestingly, this effect seems to rely on two mechanisms: sumoylation modulates binding of Utf1 to the chromatin and mediates recruitment of the messenger RNA-decapping enzyme Dcp1a through a conserved SIM (Sumo-interacting motif). Altogether, our results indicate that the combined sumoylation status of key proteins determines the proper progress of neurogenesis.
Collapse
|
15
|
Fischer C, Koblmüller S, Börger C, Michelitsch G, Trajanoski S, Schlötterer C, Guelly C, Thallinger GG, Sturmbauer C. Genome sequences of Tropheus moorii and Petrochromis trewavasae, two eco-morphologically divergent cichlid fishes endemic to Lake Tanganyika. Sci Rep 2021; 11:4309. [PMID: 33619328 PMCID: PMC7900123 DOI: 10.1038/s41598-021-81030-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 12/28/2020] [Indexed: 01/01/2023] Open
Abstract
With more than 1000 species, East African cichlid fishes represent the fastest and most species-rich vertebrate radiation known, providing an ideal model to tackle molecular mechanisms underlying recurrent adaptive diversification. We add high-quality genome reconstructions for two phylogenetic key species of a lineage that diverged about ~ 3-9 million years ago (mya), representing the earliest split of the so-called modern haplochromines that seeded additional radiations such as those in Lake Malawi and Victoria. Along with the annotated genomes we analysed discriminating genomic features of the study species, each representing an extreme trophic morphology, one being an algae browser and the other an algae grazer. The genomes of Tropheus moorii (TM) and Petrochromis trewavasae (PT) comprise 911 and 918 Mbp with 40,300 and 39,600 predicted genes, respectively. Our DNA sequence data are based on 5 and 6 individuals of TM and PT, and the transcriptomic sequences of one individual per species and sex, respectively. Concerning variation, on average we observed 1 variant per 220 bp (interspecific), and 1 variant per 2540 bp (PT vs PT)/1561 bp (TM vs TM) (intraspecific). GO enrichment analysis of gene regions affected by variants revealed several candidates which may influence phenotype modifications related to facial and jaw morphology, such as genes belonging to the Hedgehog pathway (SHH, SMO, WNT9A) and the BMP and GLI families.
Collapse
Affiliation(s)
- C Fischer
- Institute of Biology, University of Graz, Graz, Austria
- Institute of Biomedical Informatics, Graz University of Technology, Graz, Austria
| | - S Koblmüller
- Institute of Biology, University of Graz, Graz, Austria
| | - C Börger
- Institute of Biology, University of Graz, Graz, Austria
| | - G Michelitsch
- Center for Medical Research, Medical University of Graz, Graz, Austria
| | - S Trajanoski
- Center for Medical Research, Medical University of Graz, Graz, Austria
| | - C Schlötterer
- Institut für Populationsgenetik, Vetmeduni Vienna, Vienna, Austria
| | - C Guelly
- Center for Medical Research, Medical University of Graz, Graz, Austria
| | - G G Thallinger
- Institute of Biomedical Informatics, Graz University of Technology, Graz, Austria.
- BioTechMed-Graz, Graz, Austria.
| | - C Sturmbauer
- Institute of Biology, University of Graz, Graz, Austria.
- BioTechMed-Graz, Graz, Austria.
| |
Collapse
|
16
|
Chambers BE, Clark EG, Gatz AE, Wingert RA. Kctd15 regulates nephron segment development by repressing Tfap2a activity. Development 2020; 147:dev.191973. [PMID: 33028614 DOI: 10.1242/dev.191973] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 09/29/2020] [Indexed: 12/14/2022]
Abstract
A functional vertebrate kidney relies on structural units called nephrons, which are epithelial tubules with a sequence of segments each expressing a distinct repertoire of solute transporters. The transcriptiona`l codes driving regional specification, solute transporter program activation and terminal differentiation of segment populations remain poorly understood. Here, we demonstrate that the KCTD15 paralogs kctd15a and kctd15b function in concert to restrict distal early (DE)/thick ascending limb (TAL) segment lineage assignment in the developing zebrafish pronephros by repressing Tfap2a activity. During renal ontogeny, expression of these factors colocalized with tfap2a in distal tubule precursors. kctd15a/b loss primed nephron cells to adopt distal fates by driving slc12a1, kcnj1a.1 and stc1 expression. These phenotypes were the result of Tfap2a hyperactivity, where kctd15a/b-deficient embryos exhibited increased abundance of this transcription factor. Interestingly, tfap2a reciprocally promoted kctd15a and kctd15b transcription, unveiling a circuit of autoregulation operating in nephron progenitors. Concomitant kctd15b knockdown with tfap2a overexpression further expanded the DE population. Our study reveals that a transcription factor-repressor feedback module employs tight regulation of Tfap2a and Kctd15 kinetics to control nephron segment fate choice and differentiation during kidney development.
Collapse
Affiliation(s)
- Brooke E Chambers
- Department of Biological Sciences, Center for Stem Cells and Regenerative Medicine, Center for Zebrafish Research, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Eleanor G Clark
- Department of Biological Sciences, Center for Stem Cells and Regenerative Medicine, Center for Zebrafish Research, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Allison E Gatz
- Department of Biological Sciences, Center for Stem Cells and Regenerative Medicine, Center for Zebrafish Research, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Rebecca A Wingert
- Department of Biological Sciences, Center for Stem Cells and Regenerative Medicine, Center for Zebrafish Research, University of Notre Dame, Notre Dame, IN 46556, USA
| |
Collapse
|
17
|
Hu L, Chen L, Yang L, Ye Z, Huang W, Li X, Liu Q, Qiu J, Ding X. KCTD1 mutants in scalp‑ear‑nipple syndrome and AP‑2α P59A in Char syndrome reciprocally abrogate their interactions, but can regulate Wnt/β‑catenin signaling. Mol Med Rep 2020; 22:3895-3903. [PMID: 33000225 PMCID: PMC7533495 DOI: 10.3892/mmr.2020.11457] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 07/14/2020] [Indexed: 12/26/2022] Open
Abstract
Potassium-channel tetramerization-domain-containing 1 (KCTD1) mutations are reported to result in scalp-ear-nipple syndrome. These mutations occur in the conserved broad-complex, tramtrack and bric a brac domain, which is associated with inhibited transcriptional activity. However, the mechanisms of KCTD1 mutants have not previously been elucidated; thus, the present study aimed to investigate whether KCTD1 mutants affect their interaction with transcription factor AP-2α and their regulation of the Wnt pathway. Results from the present study demonstrated that none of the ten KCTD1 mutants had an inhibitory effect on the transcriptional activity of AP-2α. Co-immunoprecipitation assays demonstrated that certain mutants exhibited changeable localization compared with the nuclear localization of wild-type KCTD1, but no KCTD1 mutant interacted with AP-2α. Almost all KCTD1 mutants, except KCTD1 A30E and H33Q, exhibited differential inhibitory effects on regulating TOPFLASH luciferase reporter activity. In addition, the interaction region of KCTD1 to the PY motif (amino acids 59–62) in AP-2α was identified. KCTD1 exhibited no suppressive effects on the transcriptional activity of the AP-2α P59A mutant, resulting in Char syndrome, a genetic disorder characterized by a distinctive facial appearance, heart defect and hand abnormalities, by altered protein cellular localization that abolished protein interactions. However, the P59A, P60A, P61R and 4A AP-2α mutants inhibited TOPFLASH reporter activity. Moreover, AP-2α and KCTD1 inhibited β-catenin expression levels and SW480 cell viability. The present study thus identified a putative mechanism of disease-related KCTD1 mutants and AP-2α mutants by disrupting their interaction with the wildtype proteins AP-2α and KCTD1 and influencing the regulation of the Wnt/β-catenin pathway.
Collapse
Affiliation(s)
- Lingyu Hu
- Department of Obstetrics and Gynecology, Third Xiangya Hospital of The Central South University, Changsha, Hunan 410013, P.R. China
| | - Li Chen
- Key Laboratory of Protein Chemistry and Development Biology of State Education Ministry of China, College of Life Science, Hunan Normal University, Changsha, Hunan 410081, P.R. China
| | - Liu Yang
- Key Laboratory of Protein Chemistry and Development Biology of State Education Ministry of China, College of Life Science, Hunan Normal University, Changsha, Hunan 410081, P.R. China
| | - Zi Ye
- Yali High School of Changsha, Changsha, Hunan 410007, P.R. China
| | - Wenhuan Huang
- Key Laboratory of Protein Chemistry and Development Biology of State Education Ministry of China, College of Life Science, Hunan Normal University, Changsha, Hunan 410081, P.R. China
| | - Xinxin Li
- Key Laboratory of Protein Chemistry and Development Biology of State Education Ministry of China, College of Life Science, Hunan Normal University, Changsha, Hunan 410081, P.R. China
| | - Qing Liu
- Key Laboratory of Protein Chemistry and Development Biology of State Education Ministry of China, College of Life Science, Hunan Normal University, Changsha, Hunan 410081, P.R. China
| | - Junlu Qiu
- Key Laboratory of Protein Chemistry and Development Biology of State Education Ministry of China, College of Life Science, Hunan Normal University, Changsha, Hunan 410081, P.R. China
| | - Xiaofeng Ding
- Key Laboratory of Protein Chemistry and Development Biology of State Education Ministry of China, College of Life Science, Hunan Normal University, Changsha, Hunan 410081, P.R. China
| |
Collapse
|
18
|
Smaldone G, Coppola L, Incoronato M, Parasole R, Ripaldi M, Vitagliano L, Mirabelli P, Salvatore M. KCTD15 Protein Expression in Peripheral Blood and Acute Myeloid Leukemia. Diagnostics (Basel) 2020; 10:diagnostics10060371. [PMID: 32512747 PMCID: PMC7345863 DOI: 10.3390/diagnostics10060371] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 05/22/2020] [Accepted: 06/02/2020] [Indexed: 12/24/2022] Open
Abstract
Leukocytes are major cellular components of the inflammatory and immune response systems. After their generation in the bone marrow from hematopoietic stem cells, they maturate as granulocytes (neutrophils, eosinophils, and basophils), monocytes, and lymphocytes. The abnormal accumulation and proliferation of immature blood cells (blasts) lead to severe and widespread diseases such as leukemia. We have recently shown that KCTD15, a member of the potassium channel tetramerization domain containing protein family (KCTD), is remarkably upregulated in leukemic B-cells. Here, we extend our investigation by monitoring the KCTD15 expression levels in circulating lymphocytes, monocytes, and granulocytes, as well as in leukemia cells. Significant differences in the expression level of KCTD15 were detected in normal lymphocytes, monocytes, and granulocytes. Interestingly, we also found overexpression of the protein following leukemic transformation in the case of myeloid cell lineage. Indeed, KCTD15 was found to be upregulated in K562 and NB4 cells, as well as in HL-60 cell lines. This in vitro finding was corroborated by the analysis of KCTD15 mRNA of acute myeloid leukemia (AML) patients reported in the Microarray Innovations in Leukemia (MILE) dataset. Collectively, the present data open interesting perspectives for understanding the maturation process of leukocytes and for the diagnosis/therapy of acute leukemias.
Collapse
Affiliation(s)
- Giovanni Smaldone
- IRCCS SDN, Napoli, Via E. Gianturco 113, 80143 Naples, Italy; (G.S.); (L.C.); (M.I.); (M.S.)
| | - Luigi Coppola
- IRCCS SDN, Napoli, Via E. Gianturco 113, 80143 Naples, Italy; (G.S.); (L.C.); (M.I.); (M.S.)
| | - Mariarosaria Incoronato
- IRCCS SDN, Napoli, Via E. Gianturco 113, 80143 Naples, Italy; (G.S.); (L.C.); (M.I.); (M.S.)
| | - Rosanna Parasole
- Department of Pediatric Hematology-Oncology, Santobono-Pausilipon Hospital, 80129 Naples, Italy; (R.P.); (M.R.)
| | - Mimmo Ripaldi
- Department of Pediatric Hematology-Oncology, Santobono-Pausilipon Hospital, 80129 Naples, Italy; (R.P.); (M.R.)
| | - Luigi Vitagliano
- Institute of Biostructures and Bioimaging, C.N.R., 80134 Napoli, Italy
- Correspondence: (L.V.); (P.M.)
| | - Peppino Mirabelli
- IRCCS SDN, Napoli, Via E. Gianturco 113, 80143 Naples, Italy; (G.S.); (L.C.); (M.I.); (M.S.)
- Correspondence: (L.V.); (P.M.)
| | - Marco Salvatore
- IRCCS SDN, Napoli, Via E. Gianturco 113, 80143 Naples, Italy; (G.S.); (L.C.); (M.I.); (M.S.)
| |
Collapse
|
19
|
Oboli G, Chukwuma D, Fagbule O, Abe E, Adisa A. MOLECULAR GENETICS OF CLEFT LIP AND PALATE: A REVIEW. Ann Ib Postgrad Med 2020; 18:S16-S21. [PMID: 33071691 PMCID: PMC7513377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- G.O. Oboli
- College of Medicine, University of Ibadan, Ibadan
| | - D.I. Chukwuma
- Department of Periodontology and Community Dentistry, University College Hospital, Ibadan
| | - O.F. Fagbule
- Department of Periodontology and Community Dentistry, University College Hospital, Ibadan
| | - E.O. Abe
- Department of Oral Pathology and Oral Medicine, University College Hospital, Ibadan
| | - A.O. Adisa
- College of Medicine, University of Ibadan, Ibadan, Department of Oral Pathology and Oral Medicine, University College Hospital, Ibadan
| |
Collapse
|
20
|
KCTD15 is overexpressed in human childhood B-cell acute lymphoid leukemia. Sci Rep 2019; 9:20108. [PMID: 31882877 PMCID: PMC6934626 DOI: 10.1038/s41598-019-56701-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 12/11/2019] [Indexed: 12/11/2022] Open
Abstract
Leukemic cells originate from the malignant transformation of undifferentiated myeloid/lymphoid hematopoietic progenitors normally residing in bone marrow. As the precise molecular mechanisms underlying this heterogeneous disease are yet to be disclosed, the identification and the validation of novel actors in leukemia is of extreme importance. Here, we show that KCTD15, a member of the emerging class of KCTD ((K)potassium Channel Tetramerization Domain containing) proteins, is strongly upregulated in patients affected by B-cell type acute lymphoblastic leukemia (B-ALL) and in continuous cell lines (RS4;11, REH, TOM-1, SEM) derived from this form of childhood leukemia. Interestingly, KCTD15 downregulation induces apoptosis and cell death suggesting that it has a role in cellular homeostasis and proliferation. In addition, stimulation of normal lymphocytes with the pokeweed mitogen leads to increased KCTD15 levels in a fashion comparable to those observed in proliferating leukemic cells. In this way, the role of KCTD15 is likely not confined to the B-ALL pathological state and extends to activation and proliferation of normal lymphocytes. Collectively, data here presented indicate that KCTD15 is an important and hitherto unidentified player in childhood lymphoid leukemia, and its study could open a new scenario for the identification of altered and still unknown molecular pathways in leukemia.
Collapse
|
21
|
Spiombi E, Angrisani A, Fonte S, De Feudis G, Fabretti F, Cucchi D, Izzo M, Infante P, Miele E, Po A, Di Magno L, Magliozzi R, Guardavaccaro D, Maroder M, Canettieri G, Giannini G, Ferretti E, Gulino A, Di Marcotullio L, Moretti M, De Smaele E. KCTD15 inhibits the Hedgehog pathway in Medulloblastoma cells by increasing protein levels of the oncosuppressor KCASH2. Oncogenesis 2019; 8:64. [PMID: 31685809 PMCID: PMC6828672 DOI: 10.1038/s41389-019-0175-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 10/11/2019] [Accepted: 10/17/2019] [Indexed: 12/17/2022] Open
Abstract
Medulloblastoma (MB) is the most common malignant childhood brain tumor. About 30% of all MBs belong to the I molecular subgroup, characterized by constitutive activation of the Sonic Hedgehog (Hh) pathway. The Hh pathway is involved in several fundamental processes during embryogenesis and in adult life and its deregulation may lead to cerebellar tumorigenesis. Indeed, Hh activity must be maintained via a complex network of activating and repressor signals. One of these repressor signals is KCASH2, belonging to the KCASH family of protein, which acts as negative regulators of the Hedgehog signaling pathway during cerebellar development and differentiation. KCASH2 leads HDAC1 to degradation, allowing hyperacetylation and inhibition of transcriptional activity of Gli1, the main effector of the Hh pathway. In turn, the KCASH2 loss leads to persistent Hh activity and eventually tumorigenesis. In order to better characterize the physiologic role and modulation mechanisms of KCASH2, we have searched through a proteomic approach for new KCASH2 interactors, identifying Potassium Channel Tetramerization Domain Containing 15 (KCTD15). KCTD15 is able to directly interact with KCASH2, through its BTB/POZ domain. This interaction leads to increase KCASH2 stability which implies a reduction of the Hh pathway activity and a reduction of Hh-dependent MB cells proliferation. Here we report the identification of KCTD15 as a novel player in the complex network of regulatory proteins, which modulate Hh pathway, this could be a promising new target for therapeutic approach against MB.
Collapse
Affiliation(s)
- Eleonora Spiombi
- Department of Molecular Medicine, Sapienza University of Rome, 00161, Rome, Italy.,Department of Medical Biotechnology and Translational Medicine, University of Milan, 20090, Segrate, Milan, Italy
| | - Annapaola Angrisani
- Department of Molecular Medicine, Sapienza University of Rome, 00161, Rome, Italy
| | - Simone Fonte
- Department of Molecular Medicine, Sapienza University of Rome, 00161, Rome, Italy
| | - Giuseppina De Feudis
- Department of Molecular Medicine, Sapienza University of Rome, 00161, Rome, Italy.,Department of Experimental Oncology, European Institute of Oncology, 20139, Milan, Italy
| | - Francesca Fabretti
- Department of Molecular Medicine, Sapienza University of Rome, 00161, Rome, Italy
| | - Danilo Cucchi
- Department of Molecular Medicine, Sapienza University of Rome, 00161, Rome, Italy.,Barts Cancer Institute, Queen Mary University of London, Centre for Molecular Oncology, John Vane Science Center, London, EC1M 6BQ, UK
| | - Mariapaola Izzo
- Department of Molecular Medicine, Sapienza University of Rome, 00161, Rome, Italy.,Center for Life Nano Science@Sapienza, Istituto Italiano di Tecnologia, 00161, Rome, Italy
| | - Paola Infante
- Center for Life Nano Science@Sapienza, Istituto Italiano di Tecnologia, 00161, Rome, Italy
| | - Evelina Miele
- Department of Molecular Medicine, Sapienza University of Rome, 00161, Rome, Italy.,Department of Hematology/Oncology and Stem Cell Transplantation, Bambino Gesù Children's Hospital, IRCCS, 00165, Rome, Italy
| | - Agnese Po
- Department of Molecular Medicine, Sapienza University of Rome, 00161, Rome, Italy
| | - Laura Di Magno
- Center for Life Nano Science@Sapienza, Istituto Italiano di Tecnologia, 00161, Rome, Italy
| | | | | | - Marella Maroder
- Department of Molecular Medicine, Sapienza University of Rome, 00161, Rome, Italy
| | - Gianluca Canettieri
- Department of Molecular Medicine, Sapienza University of Rome, 00161, Rome, Italy.,Istituto Pasteur, Fondazione Cenci-Bolognetti, Sapienza University of Rome, 00161, Rome, Italy
| | - Giuseppe Giannini
- Department of Molecular Medicine, Sapienza University of Rome, 00161, Rome, Italy.,Istituto Pasteur, Fondazione Cenci-Bolognetti, Sapienza University of Rome, 00161, Rome, Italy
| | - Elisabetta Ferretti
- Department of Experimental Medicine, Sapienza University, 00161, Rome, Italy
| | - Alberto Gulino
- Department of Molecular Medicine, Sapienza University of Rome, 00161, Rome, Italy
| | - Lucia Di Marcotullio
- Department of Molecular Medicine, Sapienza University of Rome, 00161, Rome, Italy.,Istituto Pasteur, Fondazione Cenci-Bolognetti, Sapienza University of Rome, 00161, Rome, Italy
| | - Marta Moretti
- Department of Experimental Medicine, Sapienza University, 00161, Rome, Italy
| | - Enrico De Smaele
- Department of Experimental Medicine, Sapienza University, 00161, Rome, Italy.
| |
Collapse
|
22
|
Wang Y, Hoeppner LH, Angom RS, Wang E, Dutta S, Doeppler HR, Wang F, Shen T, Scarisbrick IA, Guha S, Storz P, Bhattacharya R, Mukhopadhyay D. Protein kinase D up-regulates transcription of VEGF receptor-2 in endothelial cells by suppressing nuclear localization of the transcription factor AP2β. J Biol Chem 2019; 294:15759-15767. [PMID: 31492751 PMCID: PMC6816101 DOI: 10.1074/jbc.ra119.010152] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 08/19/2019] [Indexed: 01/29/2023] Open
Abstract
Vascular endothelial growth factor A (VEGF) signals primarily through its cognate receptor VEGF receptor-2 (VEGFR-2) to control vasculogenesis and angiogenesis, key physiological processes in cardiovascular disease and cancer. In human umbilical vein endothelial cells (HUVECs), knockdown of protein kinase D-1 (PKD1) or PKD2 down-regulates VEGFR-2 expression and inhibits VEGF-induced cell proliferation and migration. However, how PKD regulates VEGF signaling is unclear. Previous bioinformatics analyses have identified binding sites for the transcription factor activating enhancer-binding protein 2 (AP2) in the VEGFR-2 promoter. Using ChIP analyses, here we found that PKD knockdown in HUVECs increases binding of AP2β to the VEGFR-2 promoter. Luciferase reporter assays with serial deletions of AP2-binding sites within the VEGFR-2 promoter revealed that its transcriptional activity negatively correlates with the number of these sites. Next we demonstrated that AP2β up-regulation decreases VEGFR-2 expression and that loss of AP2β enhances VEGFR-2 expression in HUVECs. In vivo experiments confirmed increased VEGFR-2 immunostaining in the spinal cord of AP2β knockout mouse embryos. Mechanistically, we observed that PKD phosphorylates AP2β at Ser258 and Ser277 and suppresses its nuclear accumulation. Inhibition of PKD activity with a pan-PKD inhibitor increased AP2β nuclear localization, and overexpression of both WT and constitutively active PKD1 or PKD2 reduced AP2β nuclear localization through a Ser258- and Ser277-dependent mechanism. Furthermore, substitution of Ser277 in AP2β increased its binding to the VEGFR-2 promoter. Our findings uncover evidence of a molecular pathway that regulates VEGFR-2 expression, insights that may shed light on the etiology of diseases associated with aberrant VEGF/VEGFR signaling.
Collapse
Affiliation(s)
- Ying Wang
- Department of Biochemistry and Molecular Biology, College of Medicine and Science, Mayo Clinic, Jacksonville, Florida 32224
| | - Luke H Hoeppner
- Department of Biochemistry and Molecular Biology, College of Medicine and Science, Mayo Clinic, Rochester, Minnesota 55905
| | - Ramcharan Singh Angom
- Department of Biochemistry and Molecular Biology, College of Medicine and Science, Mayo Clinic, Jacksonville, Florida 32224
| | - Enfeng Wang
- Department of Biochemistry and Molecular Biology, College of Medicine and Science, Mayo Clinic, Jacksonville, Florida 32224
| | - Shamit Dutta
- Department of Biochemistry and Molecular Biology, College of Medicine and Science, Mayo Clinic, Jacksonville, Florida 32224
| | - Heike R Doeppler
- Department of Cancer Biology, College of Medicine and Science, Mayo Clinic, Jacksonville, Florida 32224
| | - Fei Wang
- Department of Biochemistry and Molecular Biology, College of Medicine and Science, Mayo Clinic, Jacksonville, Florida 32224
- Department of Neurosurgery, Affiliated Hospital of Inner Mongolia Medical University, Hohhot 010050, China
| | - Tao Shen
- Department of Biochemistry and Molecular Biology, College of Medicine and Science, Mayo Clinic, Jacksonville, Florida 32224
- Department of Colorectal Surgery, Third Affiliated Hospital of Kunming Medical University, Kunming 650221, China
| | - Isobel A Scarisbrick
- Department of Physical Medicine and Rehabilitation, College of Medicine and Science, Mayo Clinic, Rochester, Minnesota 55905
| | - Sushovan Guha
- University of Arizona College of Medicine, Phoenix, Arizona 85004
| | - Peter Storz
- Department of Cancer Biology, College of Medicine and Science, Mayo Clinic, Jacksonville, Florida 32224
| | - Resham Bhattacharya
- Department of Biochemistry and Molecular Biology, College of Medicine and Science, Mayo Clinic, Rochester, Minnesota 55905
| | - Debabrata Mukhopadhyay
- Department of Biochemistry and Molecular Biology, College of Medicine and Science, Mayo Clinic, Jacksonville, Florida 32224
| |
Collapse
|
23
|
Wnt Signaling in Neural Crest Ontogenesis and Oncogenesis. Cells 2019; 8:cells8101173. [PMID: 31569501 PMCID: PMC6829301 DOI: 10.3390/cells8101173] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 09/23/2019] [Accepted: 09/25/2019] [Indexed: 02/06/2023] Open
Abstract
Neural crest (NC) cells are a temporary population of multipotent stem cells that generate a diverse array of cell types, including craniofacial bone and cartilage, smooth muscle cells, melanocytes, and peripheral neurons and glia during embryonic development. Defective neural crest development can cause severe and common structural birth defects, such as craniofacial anomalies and congenital heart disease. In the early vertebrate embryos, NC cells emerge from the dorsal edge of the neural tube during neurulation and then migrate extensively throughout the anterior-posterior body axis to generate numerous derivatives. Wnt signaling plays essential roles in embryonic development and cancer. This review summarizes current understanding of Wnt signaling in NC cell induction, delamination, migration, multipotency, and fate determination, as well as in NC-derived cancers.
Collapse
|
24
|
Wang D, Weng Y, Guo S, Qin W, Ni J, Yu L, Zhang Y, Zhao Q, Ben J, Ma J. microRNA-1 Regulates NCC Migration and Differentiation by Targeting sec63. Int J Biol Sci 2019; 15:2538-2547. [PMID: 31754327 PMCID: PMC6854364 DOI: 10.7150/ijbs.35357] [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] [Received: 03/31/2019] [Accepted: 07/29/2019] [Indexed: 12/21/2022] Open
Abstract
Background/Aims: Neural crest cells play a vital role in craniofacial development, microRNA-1 (miR-1) is essential in development and disease of the cardiac and skeletal muscle, the objective of our study is to investigate effects of miR-1 on neural crest cell in the craniofacial development and its molecular mechanism. Methods: We knocked down miR-1 in zebrafish by miR-1 morpholino (MO) microinjection and observed phenotype of neural crest derivatives. We detected neural crest cell migration by time-lapse. Whole-mount in situ hybridization was used to monitor the expressions of genes involved in neural crest cell induction, specification, migration and differentiation. We performed a quantitative proteomics study (iTRAQ) and bioinformatics prediction to identify the targets of miR-1 and validate the relationship between miR-1 and its target gene sec63. Results: We found defects in the tissues derived from neural crest cells: a severely reduced lower jaw and delayed appearance of pigment cells. miR-1 MO injection also disrupted neural crest cell migration. At 24 hours post fertilization (hpf), reduced expression of tfap2a, dlx2, dlx3b, ngn1 and crestin indicated that miR-1 deficiency affected neural crest cell differentiation. iTRAQ and luciferase reporter assay identified SEC63 as a direct target gene of miR-1. The defects of miR-1 deficiency could be reversed, at least in part, by specific suppression of sec63 expression. Conclusion: miR-1 is involved in the regulation of neural crest cell development, and that it acts, at least partially, by targeting sec63 expression.
Collapse
Affiliation(s)
- Dongyue Wang
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing 210019, China
| | - Yajuan Weng
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing 210019, China
| | - Shuyu Guo
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing 210019, China
| | - Wenhao Qin
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing 210019, China
| | - Jieli Ni
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing 210019, China
| | - Lei Yu
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing 210019, China
| | - Yuxin Zhang
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing 210019, China
| | - Qingshun Zhao
- MOE Key Laboratory of Model Animal for Disease Study, Model Animal Research Center, Nanjing University, Nanjing 210029, China
| | - Jingjing Ben
- Department of Pathophysiology, Key laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University, Nanjing 210029, China
| | - Junqing Ma
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing 210019, China
| |
Collapse
|
25
|
Pirone L, Smaldone G, Spinelli R, Barberisi M, Beguinot F, Vitagliano L, Miele C, Di Gaetano S, Raciti GA, Pedone E. KCTD1: A novel modulator of adipogenesis through the interaction with the transcription factor AP2α. Biochim Biophys Acta Mol Cell Biol Lipids 2019; 1864:158514. [PMID: 31465887 DOI: 10.1016/j.bbalip.2019.08.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 07/09/2019] [Accepted: 08/22/2019] [Indexed: 01/23/2023]
Abstract
Adipogenesis has an important role in regulating energy balance, tissue homeostasis and disease pathogenesis. 3T3-L1 preadipocytes have been widely used as an in vitro model for studying adipocyte differentiation. We here show that KCTD1, a member of the potassium channel containing tetramerization domain proteins, plays an active role in adipogenesis. In particular, we show KCTD1 expression 3T3-L1 cells increases upon adipogenesis induction. Treatment of 3T3-L1 preadipocytes with Kctd1-specific siRNA inhibited the differentiation, as indicated by reduction of expression of the specific adipogenic markers C/ebpα, Pparγ2, Glut4, and Adiponectin. Moreover, we also show that the protein physically interacts with the transcription factor AP2α, a known inhibitor of adipogenesis, both in vitro and in cells. Interestingly, our data indicate that KCTD1 promotes adipogenesis through the interaction with AP2α and by removing it from the nucleus. Collectively, these findings disclose a novel role for KCTD1 and pave the way for novel strategies aimed at modulating adipogenesis.
Collapse
Affiliation(s)
- Luciano Pirone
- Istituto di Biostrutture e Bioimmagini, CNR, Napoli, Italy
| | | | - Rosa Spinelli
- URT "Genomica del Diabete", Istituto per l'Endocrinologia e l'Oncologia Sperimentale "Gaetano Salvatore", CNR, Napoli, Italy; Dipartimento di Scienze Mediche Traslazionali, Università degli Studi di Napoli Federico II, Italy
| | - Manlio Barberisi
- Dipartimento Scienze Anastesiologiche, Chirurgiche E Dell'emergenza, Università Della Campania-Luigi Vanvitelli, Caserta, Italy
| | - Francesco Beguinot
- URT "Genomica del Diabete", Istituto per l'Endocrinologia e l'Oncologia Sperimentale "Gaetano Salvatore", CNR, Napoli, Italy; Dipartimento di Scienze Mediche Traslazionali, Università degli Studi di Napoli Federico II, Italy
| | | | - Claudia Miele
- URT "Genomica del Diabete", Istituto per l'Endocrinologia e l'Oncologia Sperimentale "Gaetano Salvatore", CNR, Napoli, Italy; Dipartimento di Scienze Mediche Traslazionali, Università degli Studi di Napoli Federico II, Italy
| | | | - Gregory Alexander Raciti
- URT "Genomica del Diabete", Istituto per l'Endocrinologia e l'Oncologia Sperimentale "Gaetano Salvatore", CNR, Napoli, Italy; Dipartimento di Scienze Mediche Traslazionali, Università degli Studi di Napoli Federico II, Italy
| | - Emilia Pedone
- Istituto di Biostrutture e Bioimmagini, CNR, Napoli, Italy.
| |
Collapse
|
26
|
The Structural Versatility of the BTB Domains of KCTD Proteins and Their Recognition of the GABA B Receptor. Biomolecules 2019; 9:biom9080323. [PMID: 31370201 PMCID: PMC6722564 DOI: 10.3390/biom9080323] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 07/29/2019] [Accepted: 07/30/2019] [Indexed: 02/07/2023] Open
Abstract
Several recent investigations have demonstrated that members of the KCTD (Potassium Channel Tetramerization Domain) protein family are involved in fundamental processes. However, the paucity of structural data available on these proteins has frequently prevented the definition of their biochemical role(s). Fortunately, this scenario is rapidly changing as, in very recent years, several crystallographic structures have been reported. Although these investigations have provided very important insights into the function of KCTDs, they have also raised some puzzling issues. One is related to the observation that the BTB (broad-complex, tramtrack, and bric-à-brac) domain of these proteins presents a remarkable structural versatility, being able to adopt a variety of oligomeric states. To gain insights into this intriguing aspect, we performed extensive molecular dynamics simulations on several BTB domains of KCTD proteins in different oligomeric states (monomers, dimers, tetramers, and open/close pentamers). These studies indicate that KCTD-BTB domains are stable in the simulation timescales, even in their monomeric forms. Moreover, simulations also show that the dynamic behavior of open pentameric states is strictly related to their functional roles and that different KCTDs may form stable hetero-oligomers. Molecular dynamics (MD) simulations also provided a dynamic view of the complex formed by KCTD16 and the GABAB2 receptor, whose structure has been recently reported. Finally, simulations carried out on the isolated fragment of the GABAB2 receptor that binds KCTD16 indicate that it is able to assume the local conformation required for the binding to KCTD.
Collapse
|
27
|
Teng X, Aouacheria A, Lionnard L, Metz KA, Soane L, Kamiya A, Hardwick JM. KCTD: A new gene family involved in neurodevelopmental and neuropsychiatric disorders. CNS Neurosci Ther 2019; 25:887-902. [PMID: 31197948 PMCID: PMC6566181 DOI: 10.1111/cns.13156] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 05/02/2019] [Accepted: 05/13/2019] [Indexed: 12/12/2022] Open
Abstract
The underlying molecular basis for neurodevelopmental or neuropsychiatric disorders is not known. In contrast, mechanistic understanding of other brain disorders including neurodegeneration has advanced considerably. Yet, these do not approach the knowledge accrued for many cancers with precision therapeutics acting on well-characterized targets. Although the identification of genes responsible for neurodevelopmental and neuropsychiatric disorders remains a major obstacle, the few causally associated genes are ripe for discovery by focusing efforts to dissect their mechanisms. Here, we make a case for delving into mechanisms of the poorly characterized human KCTD gene family. Varying levels of evidence support their roles in neurocognitive disorders (KCTD3), neurodevelopmental disease (KCTD7), bipolar disorder (KCTD12), autism and schizophrenia (KCTD13), movement disorders (KCTD17), cancer (KCTD11), and obesity (KCTD15). Collective knowledge about these genes adds enhanced value, and critical insights into potential disease mechanisms have come from unexpected sources. Translation of basic research on the KCTD-related yeast protein Whi2 has revealed roles in nutrient signaling to mTORC1 (KCTD11) and an autophagy-lysosome pathway affecting mitochondria (KCTD7). Recent biochemical and structure-based studies (KCTD12, KCTD13, KCTD16) reveal mechanisms of regulating membrane channel activities through modulation of distinct GTPases. We explore how these seemingly varied functions may be disease related.
Collapse
Affiliation(s)
- Xinchen Teng
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical SciencesSoochow UniversitySuzhouChina
- W. Harry Feinstone Department of Molecular Microbiology and ImmunologyJohns Hopkins University Bloomberg School of Public HealthBaltimoreMaryland
| | - Abdel Aouacheria
- ISEM, Institut des Sciences de l'Evolution de Montpellier, CNRS, EPHE, IRDUniversité de MontpellierMontpellierFrance
| | - Loïc Lionnard
- ISEM, Institut des Sciences de l'Evolution de Montpellier, CNRS, EPHE, IRDUniversité de MontpellierMontpellierFrance
| | - Kyle A. Metz
- W. Harry Feinstone Department of Molecular Microbiology and ImmunologyJohns Hopkins University Bloomberg School of Public HealthBaltimoreMaryland
- Present address:
Feinberg School of MedicineNorthwestern UniversityChicagoUSA
| | - Lucian Soane
- W. Harry Feinstone Department of Molecular Microbiology and ImmunologyJohns Hopkins University Bloomberg School of Public HealthBaltimoreMaryland
| | - Atsushi Kamiya
- Department of Psychiatry and Behavioral SciencesJohns Hopkins School of MedicineBaltimoreMaryland
| | - J. Marie Hardwick
- W. Harry Feinstone Department of Molecular Microbiology and ImmunologyJohns Hopkins University Bloomberg School of Public HealthBaltimoreMaryland
| |
Collapse
|
28
|
The essential player in adipogenesis GRP78 is a novel KCTD15 interactor. Int J Biol Macromol 2018; 115:469-475. [PMID: 29665387 DOI: 10.1016/j.ijbiomac.2018.04.078] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Revised: 04/10/2018] [Accepted: 04/13/2018] [Indexed: 01/08/2023]
Abstract
KCTD15 is a member of the K+ Channel Tetramerization Domain family, implicated in crucial physio-pathological processes. Recent evidences suggest that KCTD15 is an obesity-linked protein in humans and its Drosophila homologue is involved in food uptake. KCTD15 molecular mechanism in these processes is still unknown. To fill this gap, KCTD15 was biophysically characterized showing a folded, pentameric region endowed with a remarkable thermal stability. Notably, the C-terminal domain significantly contributes to the stabilization of the BTB N-terminal domain. The availability of large amount of stable recombinant protein also made possible a functional proteomic approach in 3T3-L1 cells to search for novel KCTD15 interactors. These investigations led to the discovery that GRP78 is a KCTD15 partner in all the adipogenesis phases. Our data clearly prove the physical interaction of the two proteins and also indicate that GRP78 plays an active role in the stabilization of KCTD15. Furthermore, the presence in Drosophila of a GRP78 homologue corroborates the physiological role played by the complex KCTD15-GRP78 in the adipogenesis process and indicates that it is evolutionarily conserved. Present results also suggest that KCTD15 may be a new target for obesity control.
Collapse
|
29
|
Claes P, Roosenboom J, White JD, Swigut T, Sero D, Li J, Lee MK, Zaidi A, Mattern BC, Liebowitz C, Pearson L, González T, Leslie EJ, Carlson JC, Orlova E, Suetens P, Vandermeulen D, Feingold E, Marazita ML, Shaffer JR, Wysocka J, Shriver MD, Weinberg SM. Genome-wide mapping of global-to-local genetic effects on human facial shape. Nat Genet 2018; 50:414-423. [PMID: 29459680 PMCID: PMC5937280 DOI: 10.1038/s41588-018-0057-4] [Citation(s) in RCA: 133] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Accepted: 01/03/2018] [Indexed: 11/08/2022]
Abstract
Genome-wide association scans of complex multipartite traits like the human face typically use preselected phenotypic measures. Here we report a data-driven approach to phenotyping facial shape at multiple levels of organization, allowing for an open-ended description of facial variation while preserving statistical power. In a sample of 2,329 persons of European ancestry, we identified 38 loci, 15 of which replicated in an independent European sample (n = 1,719). Four loci were completely new. For the others, additional support (n = 9) or pleiotropic effects (n = 2) were found in the literature, but the results reported here were further refined. All 15 replicated loci highlighted distinctive patterns of global-to-local genetic effects on facial shape and showed enrichment for active chromatin elements in human cranial neural crest cells, suggesting an early developmental origin of the facial variation captured. These results have implications for studies of facial genetics and other complex morphological traits.
Collapse
Affiliation(s)
- Peter Claes
- Department of Electrical Engineering, ESAT/PSI, KU Leuven, Leuven, Belgium.
- Medical Imaging Research Center, MIRC, UZ Leuven, Leuven, Belgium.
- Murdoch Childrens Research Institute, Melbourne, Victoria, Australia.
| | - Jasmien Roosenboom
- Center for Craniofacial and Dental Genetics, Department of Oral Biology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Julie D White
- Department of Anthropology, Penn State University, University Park, PA, USA
| | - Tomek Swigut
- Department of Chemical and Systems Biology, Stanford University School of Medicine, Stanford, CA, USA
| | - Dzemila Sero
- Department of Electrical Engineering, ESAT/PSI, KU Leuven, Leuven, Belgium
- Medical Imaging Research Center, MIRC, UZ Leuven, Leuven, Belgium
| | - Jiarui Li
- Department of Electrical Engineering, ESAT/PSI, KU Leuven, Leuven, Belgium
- Medical Imaging Research Center, MIRC, UZ Leuven, Leuven, Belgium
| | - Myoung Keun Lee
- Center for Craniofacial and Dental Genetics, Department of Oral Biology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Arslan Zaidi
- Department of Anthropology, Penn State University, University Park, PA, USA
| | - Brooke C Mattern
- Department of Anthropology, Penn State University, University Park, PA, USA
| | - Corey Liebowitz
- Department of Anthropology, Penn State University, University Park, PA, USA
| | - Laurel Pearson
- Department of Anthropology, Penn State University, University Park, PA, USA
| | - Tomás González
- Department of Anthropology, Penn State University, University Park, PA, USA
| | - Elizabeth J Leslie
- Center for Craniofacial and Dental Genetics, Department of Oral Biology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Jenna C Carlson
- Department of Biostatistics, University of Pittsburgh, Pittsburgh, PA, USA
| | - Ekaterina Orlova
- Department of Human Genetics, University of Pittsburgh, Pittsburgh, PA, USA
| | - Paul Suetens
- Department of Electrical Engineering, ESAT/PSI, KU Leuven, Leuven, Belgium
- Medical Imaging Research Center, MIRC, UZ Leuven, Leuven, Belgium
| | - Dirk Vandermeulen
- Department of Electrical Engineering, ESAT/PSI, KU Leuven, Leuven, Belgium
- Medical Imaging Research Center, MIRC, UZ Leuven, Leuven, Belgium
| | - Eleanor Feingold
- Department of Biostatistics, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Human Genetics, University of Pittsburgh, Pittsburgh, PA, USA
| | - Mary L Marazita
- Center for Craniofacial and Dental Genetics, Department of Oral Biology, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Human Genetics, University of Pittsburgh, Pittsburgh, PA, USA
| | - John R Shaffer
- Department of Human Genetics, University of Pittsburgh, Pittsburgh, PA, USA
| | - Joanna Wysocka
- Department of Chemical and Systems Biology, Stanford University School of Medicine, Stanford, CA, USA.
- Department of Developmental Biology, Stanford University School of Medicine, Stanford, CA, USA.
| | - Mark D Shriver
- Department of Anthropology, Penn State University, University Park, PA, USA.
| | - Seth M Weinberg
- Center for Craniofacial and Dental Genetics, Department of Oral Biology, University of Pittsburgh, Pittsburgh, PA, USA.
- Department of Anthropology, University of Pittsburgh, Pittsburgh, PA, USA.
| |
Collapse
|
30
|
Wong TCB, Rebbert M, Wang C, Chen X, Heffer A, Zarelli VE, Dawid IB, Zhao H. Genes regulated by potassium channel tetramerization domain containing 15 (Kctd15) in the developing neural crest. THE INTERNATIONAL JOURNAL OF DEVELOPMENTAL BIOLOGY 2018; 60:159-66. [PMID: 27389986 DOI: 10.1387/ijdb.160058id] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Neural crest (NC) development is controlled precisely by a regulatory network with multiple signaling pathways and the involvement of many genes. The integration and coordination of these factors are still incompletely understood. Overexpression of Wnt3a and the BMP antagonist Chordin in animal cap cells from Xenopus blastulae induces a large number of NC specific genes. We previously suggested that Potassium Channel Tetramerization Domain containing 15 (Kctd15) regulates NC formation by affecting Wnt signaling and the activity of transcription factor AP-2. In order to advance understanding of the function of Kctd15 during NC development, we performed DNA microarray assays in explants injected with Wnt3a and Chordin, and identified genes that are affected by Kctd15 overexpression. Among the many genes identified, we chose Duf domain containing protein 1 (ddcp1), Platelet-Derived Growth Factor Receptor a (pdgfra), Complement factor properdin (cfp), Zinc Finger SWIM-Type Containing 5 (zswim5), and complement component 3 (C3) to examine their expression by whole mount in situ hybridization. Our work points to a possible role for Kctd15 in the regulation of NC formation and other steps in embryonic development.
Collapse
Affiliation(s)
- Thomas C B Wong
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, P. R. China
| | | | | | | | | | | | | | | |
Collapse
|
31
|
Heffer A, Marquart GD, Aquilina-Beck A, Saleem N, Burgess HA, Dawid IB. Generation and characterization of Kctd15 mutations in zebrafish. PLoS One 2017; 12:e0189162. [PMID: 29216270 PMCID: PMC5720732 DOI: 10.1371/journal.pone.0189162] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Accepted: 11/08/2017] [Indexed: 01/08/2023] Open
Abstract
Potassium channel tetramerization domain containing 15 (Kctd15) was previously found to have a role in early neural crest (NC) patterning, specifically delimiting the region where NC markers are expressed via repression of transcription factor AP-2a and inhibition of Wnt signaling. We used transcription activator-like effector nucleases (TALENs) to generate null mutations in zebrafish kctd15a and kctd15b paralogs to study the in vivo role of Kctd15. We found that while deletions producing frame-shift mutations in each paralog showed no apparent phenotype, kctd15a/b double mutant zebrafish are smaller in size and show several phenotypes including some affecting the NC, such as expansion of the early NC domain, increased pigmentation, and craniofacial defects. Both melanophore and xanthophore pigment cell numbers and early markers are up-regulated in the double mutants. While we find no embryonic craniofacial defects, adult mutants have a deformed maxillary segment and missing barbels. By confocal imaging of mutant larval brains we found that the torus lateralis (TLa), a region implicated in gustatory networks in other fish, is absent. Ablation of this brain tissue in wild type larvae mimics some aspects of the mutant growth phenotype. Thus kctd15 mutants show deficits in the development of both neural crest derivatives, and specific regions within the central nervous system, leading to a strong reduction in normal growth rates.
Collapse
Affiliation(s)
- Alison Heffer
- Division of Developmental Biology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, United States of America
| | - Gregory D. Marquart
- Division of Developmental Biology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, United States of America
| | - Allisan Aquilina-Beck
- Division of Developmental Biology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, United States of America
| | - Nabil Saleem
- Division of Developmental Biology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, United States of America
| | - Harold A. Burgess
- Division of Developmental Biology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, United States of America
| | - Igor B. Dawid
- Division of Developmental Biology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, United States of America
- * E-mail:
| |
Collapse
|
32
|
Mao L, Fang Y, Campbell M, Southerland WM. Population differentiation in allele frequencies of obesity-associated SNPs. BMC Genomics 2017; 18:861. [PMID: 29126384 PMCID: PMC5681842 DOI: 10.1186/s12864-017-4262-9] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Accepted: 11/02/2017] [Indexed: 08/11/2023] Open
Abstract
BACKGROUND Obesity is emerging as a global health problem, with more than one-third of the world's adult population being overweight or obese. In this study, we investigated worldwide population differentiation in allele frequencies of obesity-associated SNPs (single nucleotide polymorphisms). RESULTS We collected a total of 225 obesity-associated SNPs from a public database. Their population-level allele frequencies were derived based on the genotype data from 1000 Genomes Project (phase 3). We used hypergeometric model to assess whether the effect allele at a given SNP is significantly enriched or depleted in each of the 26 populations surveyed in the 1000 Genomes Project with respect to the overall pooled population. Our results indicate that 195 out of 225 SNPs (86.7%) possess effect alleles significantly enriched or depleted in at least one of the 26 populations. Populations within the same continental group exhibit similar allele enrichment/depletion patterns whereas inter-continental populations show distinct patterns. Among the 225 SNPs, 15 SNPs cluster in the first intron region of the FTO gene, which is a major gene associated with body-mass index (BMI) and fat mass. African populations exhibit much smaller blocks of LD (linkage disequilibrium) among these15 SNPs while European and Asian populations have larger blocks. To estimate the cumulative effect of all variants associated with obesity, we developed the personal composite genetic risk score for obesity. Our results indicate that the East Asian populations have the lowest averages of the composite risk scores, whereas three European populations have the highest averages. In addition, the population-level average of composite genetic risk scores is significantly correlated (R2 = 0.35, P = 0.0060) with obesity prevalence. CONCLUSIONS We have detected substantial population differentiation in allele frequencies of obesity-associated SNPs. The results will help elucidate the genetic basis which may contribute to population disparities in obesity prevalence.
Collapse
Affiliation(s)
- Linyong Mao
- Department of Biochemistry and Molecular Biology, Howard University College of Medicine, 520 W Street NW, Washington, DC 20059 USA
| | - Yayin Fang
- Department of Biochemistry and Molecular Biology, Howard University College of Medicine, 520 W Street NW, Washington, DC 20059 USA
| | - Michael Campbell
- Department of Biology, Howard University, 415 College Street NW, Washington, 20059 DC USA
| | - William M. Southerland
- Department of Biochemistry and Molecular Biology, Howard University College of Medicine, 520 W Street NW, Washington, DC 20059 USA
| |
Collapse
|
33
|
Gamero-Villarroel C, González LM, Rodríguez-López R, Albuquerque D, Carrillo JA, García-Herráiz A, Flores I, Gervasini G. Influence of TFAP2B and KCTD15 genetic variability on personality dimensions in anorexia and bulimia nervosa. Brain Behav 2017; 7:e00784. [PMID: 28948079 PMCID: PMC5607548 DOI: 10.1002/brb3.784] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Revised: 05/10/2017] [Accepted: 06/26/2017] [Indexed: 11/23/2022] Open
Abstract
INTRODUCTION TFAP2B and KCTD15 are obesity-related genes that interact to regulate feeding behavior. We hypothesize that variability in these loci, isolated or in combination, could also be related to the risk of eating disorders (ED) and/or associated psychological traits. METHODS We screened 425 participants (169 ED patients, 75 obese subjects, and 181 controls) for 10 clinically relevant and tag single-nucleotide polymorphisms (SNPs) in KCTD15 and TFAP2B by the Sequenom MassARRAY platform and direct sequencing. Psychometric evaluation was performed with EDI-2 and SCL-90R inventories. RESULTS The KCTD15 rs287103 T variant allele was associated with increased risk of bulimia nervosa (BN) (OR = 4.34 [1.47-29.52]; p = .003) and with scores of psychopathological scales of these patients. Haplotype *6 in KCTD15 was more frequent in controls (OR = 0.40 [0.20-0.80], p = .009 for anorexia nervosa), while haplotype *4 in TFAP2B affected all three scales of the SCL-90R inventory in BN patients (p ≤ .01). Epistasis analyses revealed relevant interactions with body mass index of BN patients (p < .001). Genetic profiles in obese patients did not significantly differ from those found in ED patients. CONCLUSIONS This is the first study that evaluates the combined role of TFAP2B and KCTD15 genes in ED. Our preliminary findings suggest that the interaction of genetic variability in these loci could influence the risk for ED and/or anthropometric and psychological parameters.
Collapse
Affiliation(s)
- Carmen Gamero-Villarroel
- Department of Medical & Surgical Therapeutics Division of Pharmacology Medical School University of Extremadura Badajoz Spain
| | - Luz M González
- Department of Medical & Surgical Therapeutics Division of Pharmacology Medical School University of Extremadura Badajoz Spain
| | | | - David Albuquerque
- Service of Clinical Analyses General University Hospital Valencia Spain.,Research Center for Anthropology and Health (CIAS) University of Coimbra Coimbra Portugal
| | - Juan A Carrillo
- Department of Medical & Surgical Therapeutics Division of Pharmacology Medical School University of Extremadura Badajoz Spain
| | | | - Isalud Flores
- Eating Disorders UnitInstitute of Mental Disorders Health Service of Extremadura Badajoz Spain
| | - Guillermo Gervasini
- Department of Medical & Surgical Therapeutics Division of Pharmacology Medical School University of Extremadura Badajoz Spain
| |
Collapse
|
34
|
Usluer S, Kayserili MA, Eken AG, Yiş U, Leu C, Altmüller J, Thiele H, Nürnberg P, Sander T, Çağlayan SH. Association of a synonymous SCN1B variant affecting splicing efficiency with Benign Familial Infantile Epilepsy (BFIE). Eur J Paediatr Neurol 2017; 21:773-782. [PMID: 28566192 DOI: 10.1016/j.ejpn.2017.05.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Revised: 03/26/2017] [Accepted: 05/06/2017] [Indexed: 11/16/2022]
Abstract
Benign Familial Infantile Epilepsy (BFIE) is clinically characterized by clusters of brief partial seizures progressing to secondarily generalized seizures with onset at the age of 3-7 months and with favorable outcome. PRRT2 mutations are the most common cause of BFIE, and found in about 80% of BFIE families. In this study, we analyzed a large multiplex BFIE family by linkage and whole exome sequencing (WES) analyses. Genome-wide linkage analysis revealed significant evidence for linkage in the chromosomal region 19p12-q13 (LOD score 3.48). Mutation screening of positional candidate genes identified a synonymous SCN1B variant (c.492T>C, p.Tyr164Tyr) affecting splicing by the removal of a splicing silencer sequence, shown by in silico analysis, as the most likely causative mutation. In addition, the PRRT2 frameshift mutation (c.649dupC/p.Arg217Profs*8) was observed, showing incomplete, but high segregation with the phenotype. In vitro splicing assay of SCN1B expression confirmed the in silico findings showing a splicing imbalance between wild type and mutant exons. Herein, the involvement of the SCN1B gene in the etiology of BFIE, contributing to the disease phenotype as a modifier or part of an oligogenic predisposition, is shown for the first time.
Collapse
Affiliation(s)
- Sunay Usluer
- Formerly Affiliated with the Department of Molecular Biology and Genetics, Boğaziçi University, Istanbul, Turkey
| | - Melek Aslı Kayserili
- Formerly Affiliated with the Department of Molecular Biology and Genetics, Boğaziçi University, Istanbul, Turkey
| | - Aslı Gündoğdu Eken
- Department of Molecular Biology and Genetics, Bogazici University, Istanbul, Turkey
| | - Uluc Yiş
- Department of Pediatrics, Division of Child Neurology, Dokuz Eylül University School of Medicine, İzmir, Turkey
| | - Costin Leu
- Cologne Center for Genomics, University of Cologne, Cologne, Germany
| | - Janine Altmüller
- Cologne Center for Genomics, University of Cologne, Cologne, Germany
| | - Holger Thiele
- Cologne Center for Genomics, University of Cologne, Cologne, Germany
| | - Peter Nürnberg
- Cologne Center for Genomics, University of Cologne, Cologne, Germany
| | - Thomas Sander
- Cologne Center for Genomics, University of Cologne, Cologne, Germany
| | - S Hande Çağlayan
- Department of Molecular Biology and Genetics, Bogazici University, Istanbul, Turkey.
| |
Collapse
|
35
|
Askary A, Xu P, Barske L, Bay M, Bump P, Balczerski B, Bonaguidi MA, Crump JG. Genome-wide analysis of facial skeletal regionalization in zebrafish. Development 2017; 144:2994-3005. [PMID: 28705894 DOI: 10.1242/dev.151712] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Accepted: 07/10/2017] [Indexed: 12/16/2022]
Abstract
Patterning of the facial skeleton involves the precise deployment of thousands of genes in distinct regions of the pharyngeal arches. Despite the significance for craniofacial development, how genetic programs drive this regionalization remains incompletely understood. Here we use combinatorial labeling of zebrafish cranial neural crest-derived cells (CNCCs) to define global gene expression along the dorsoventral axis of the developing arches. Intersection of region-specific transcriptomes with expression changes in response to signaling perturbations demonstrates complex roles for Endothelin 1 (Edn1) signaling in the intermediate joint-forming region, yet a surprisingly minor role in ventralmost regions. Analysis of co-variance across multiple sequencing experiments further reveals clusters of co-regulated genes, with in situ hybridization confirming the domain-specific expression of novel genes. We then created loss-of-function alleles for 12 genes and uncovered antagonistic functions of two new Edn1 targets, follistatin a (fsta) and emx2, in regulating cartilaginous joints in the hyoid arch. Our unbiased discovery and functional analysis of genes with regional expression in zebrafish arch CNCCs reveals complex regulation by Edn1 and points to novel candidates for craniofacial disorders.
Collapse
Affiliation(s)
- Amjad Askary
- Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, University of Southern California, Los Angeles, CA 90033, USA
| | - Pengfei Xu
- Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, University of Southern California, Los Angeles, CA 90033, USA
| | - Lindsey Barske
- Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, University of Southern California, Los Angeles, CA 90033, USA
| | - Maxwell Bay
- Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, University of Southern California, Los Angeles, CA 90033, USA
| | - Paul Bump
- Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, University of Southern California, Los Angeles, CA 90033, USA
| | - Bartosz Balczerski
- Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, University of Southern California, Los Angeles, CA 90033, USA
| | - Michael A Bonaguidi
- Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, University of Southern California, Los Angeles, CA 90033, USA
| | - J Gage Crump
- Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, University of Southern California, Los Angeles, CA 90033, USA
| |
Collapse
|
36
|
Pirone L, Smaldone G, Esposito C, Balasco N, Petoukhov MV, Spilotros A, Svergun DI, Di Gaetano S, Vitagliano L, Pedone EM. Proteins involved in sleep homeostasis: Biophysical characterization of INC and its partners. Biochimie 2016; 131:106-114. [PMID: 27678190 DOI: 10.1016/j.biochi.2016.09.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2016] [Revised: 09/22/2016] [Accepted: 09/22/2016] [Indexed: 12/29/2022]
Abstract
The insomniac protein of Drosophila melanogaster (INC) has a crucial role in sleep homeostasis as flies lacking the inc gene exhibit strikingly reduced and poorly consolidated sleep. Nevertheless, in vitro characterizations of INC biophysical properties and partnerships have not been yet reported. Here we report the heterologous expression of the protein and its characterization using a number of different techniques. Present data indicate that INC is endowed with a remarkable stability, which results from the cooperation of the two protein domains. Moreover, we also demonstrated and quantified the ability of INC to recognize its potential partners Cul3 and dGRASP. Taking into account the molecular organization of the protein, these two partners may be anchored simultaneously. Although there is no evident relationship between the reported INC functions and dGRASP binding, our data suggest that INC may cooperate as ligase adaptor to dGRASP ubiquitination. SAXS data collected on the complex between INC and Cul3, which represent the first structural characterization of this type of assemblies, clearly highlight the highly dynamic nature of these complexes. This strongly suggests that the functional behavior of these proteins cannot be understood if dynamic effects are not considered. Finally, the strict analogy of the biochemical/biophysical properties of INC and of its human homolog KCTD5 may reliably indicate that this latter protein and/or the closely related proteins KCTD2/KCTD17 may play important roles in human sleep regulation.
Collapse
Affiliation(s)
- Luciano Pirone
- Institute of Biostructures and Bioimaging, C.N.R., Via Mezzocannone 16, 80134 Napoli, Italy
| | | | - Carla Esposito
- Institute of Biostructures and Bioimaging, C.N.R., Via Mezzocannone 16, 80134 Napoli, Italy
| | - Nicole Balasco
- Institute of Biostructures and Bioimaging, C.N.R., Via Mezzocannone 16, 80134 Napoli, Italy
| | - Maxim V Petoukhov
- European Molecular Biology Laboratory, Hamburg Outstation, c/o DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - Alessandro Spilotros
- European Molecular Biology Laboratory, Hamburg Outstation, c/o DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - Dmitri I Svergun
- European Molecular Biology Laboratory, Hamburg Outstation, c/o DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - Sonia Di Gaetano
- Institute of Biostructures and Bioimaging, C.N.R., Via Mezzocannone 16, 80134 Napoli, Italy.
| | - Luigi Vitagliano
- Institute of Biostructures and Bioimaging, C.N.R., Via Mezzocannone 16, 80134 Napoli, Italy.
| | - Emilia Maria Pedone
- Institute of Biostructures and Bioimaging, C.N.R., Via Mezzocannone 16, 80134 Napoli, Italy.
| |
Collapse
|
37
|
Li X, Gaillard F, Monckton EA, Glubrecht DD, Persad ARL, Moser M, Sauvé Y, Godbout R. Loss of AP-2delta reduces retinal ganglion cell numbers and axonal projections to the superior colliculus. Mol Brain 2016; 9:62. [PMID: 27259519 PMCID: PMC4893287 DOI: 10.1186/s13041-016-0244-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Accepted: 05/29/2016] [Indexed: 11/10/2022] Open
Abstract
Background AP-2δ is the most divergent member of the Activating Protein-2 (TFAP2) family of transcription factors. AP-2δ is restricted to specific regions of the CNS, including a subset of ganglion cells in the retina. Retinal ganglion cells (RGCs), the only output neurons of the retina, are responsible for transmitting the visual signal to the brain. Results AP-2δ knockout results in loss of Brn3c (Pou4f3) expression in AP-2δ -positive RGCs. While AP-2δ-/- mice have morphologically normal retinas at birth, there is a significant reduction in retinal ganglion cell numbers by P21, after eye opening. Chromatin immunoprecipitation indicates that Brn3c is a target of AP-2δ in the retina. Using fluorochrome-conjugated cholera toxin subunit B to trace ganglion cell axons from the eye to the major visual pathways in the brain, we found 87 % and 32 % decreases in ipsilateral and contralateral projections, respectively, to the superior colliculus in AP-2δ-/- mice. In agreement with anatomical data, visually evoked responses recorded from the brain confirmed that retinal outputs to the brain are compromised. Conclusions AP-2δ is important for the maintenance of ganglion cell numbers in the retina. Loss of AP-2δ alters retinal axonal projections to visual centers of the brain, with ipsilaterial projections to the superior colliculus being the most dramatically affected. Our results have important implications for integration of the visual signal at the superior colliculus. Electronic supplementary material The online version of this article (doi:10.1186/s13041-016-0244-0) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Xiaodong Li
- Department of Oncology, Cross Cancer Institute, University of Alberta, 11560 University Avenue, Edmonton, AB, T6G 1Z2, Canada
| | - Frédéric Gaillard
- Department of Physiology, University of Alberta, 11560 University Avenue, Edmonton, AB, Canada.,Department of Ophthalmology, University of Alberta, 11560 University Avenue, Edmonton, AB, Canada
| | - Elizabeth A Monckton
- Department of Oncology, Cross Cancer Institute, University of Alberta, 11560 University Avenue, Edmonton, AB, T6G 1Z2, Canada
| | - Darryl D Glubrecht
- Department of Oncology, Cross Cancer Institute, University of Alberta, 11560 University Avenue, Edmonton, AB, T6G 1Z2, Canada
| | - Amit R L Persad
- Department of Oncology, Cross Cancer Institute, University of Alberta, 11560 University Avenue, Edmonton, AB, T6G 1Z2, Canada
| | - Markus Moser
- Max-Planck-Institute of Biochemistry, Martinsried, Germany
| | - Yves Sauvé
- Department of Physiology, University of Alberta, 11560 University Avenue, Edmonton, AB, Canada.,Department of Ophthalmology, University of Alberta, 11560 University Avenue, Edmonton, AB, Canada
| | - Roseline Godbout
- Department of Oncology, Cross Cancer Institute, University of Alberta, 11560 University Avenue, Edmonton, AB, T6G 1Z2, Canada.
| |
Collapse
|
38
|
Smaldone G, Pirone L, Pedone E, Marlovits T, Vitagliano L, Ciccarelli L. The BTB domains of the potassium channel tetramerization domain proteins prevalently assume pentameric states. FEBS Lett 2016; 590:1663-71. [PMID: 27152988 DOI: 10.1002/1873-3468.12203] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Revised: 04/21/2016] [Accepted: 04/26/2016] [Indexed: 01/05/2023]
Abstract
Potassium channel tetramerization domain-containing (KCTD) proteins are involved in fundamental physio-pathological processes. Here, we report an analysis of the oligomeric state of the Bric-à-brack, Tram-track, Broad complex (BTB) domains of seven distinct KCTDs belonging to five major clades of the family evolution tree. Despite their functional and sequence variability, present electron microscopy data highlight the occurrence of well-defined pentameric states for all domains. Our data also show that these states coexist with alternative forms which include open pentamers. Thermal denaturation analyses conducted using KCTD1 as a model suggest that, in these proteins, different domains cooperate to their overall stability. Finally, negative-stain electron micrographs of KCTD6(BTB) in complex with Cullin3 show the presence of assemblies with a five-pointed pinwheel shape.
Collapse
Affiliation(s)
| | - Luciano Pirone
- Institute of Biostructures and Bioimaging, C.N.R., Napoli, Italy.,Consorzio Interuniversitario di Ricerca in Chimica dei Metalli nei Sistemi Biologici (C.I.R.C.M.S.B.), Catania, Italy
| | - Emilia Pedone
- Institute of Biostructures and Bioimaging, C.N.R., Napoli, Italy
| | - Thomas Marlovits
- Center for Structural Systems Biology (CSSB), University Medical Center Hamburg-Eppendorf (UKE), Hamburg, Germany.,Deutsches Elektronen-Synchrotron (DESY), Hamburg, Germany.,Institute of Molecular Biotechnology (IMBA), Austrian Academy of Sciences, Vienna, Austria.,Research Institute of Molecular Pathology (IMP), Vienna, Austria
| | - Luigi Vitagliano
- Institute of Biostructures and Bioimaging, C.N.R., Napoli, Italy
| | - Luciano Ciccarelli
- Center for Structural Systems Biology (CSSB), University Medical Center Hamburg-Eppendorf (UKE), Hamburg, Germany.,Deutsches Elektronen-Synchrotron (DESY), Hamburg, Germany.,Institute of Molecular Biotechnology (IMBA), Austrian Academy of Sciences, Vienna, Austria.,Research Institute of Molecular Pathology (IMP), Vienna, Austria
| |
Collapse
|
39
|
Barone D, Balasco N, Vitagliano L. KCTD5 is endowed with large, functionally relevant, interdomain motions. J Biomol Struct Dyn 2015; 34:1725-35. [PMID: 26336981 DOI: 10.1080/07391102.2015.1090343] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The KCTD family is an emerging class of proteins that are involved in important biological processes whose biochemical and structural properties are rather poorly characterized or even completely undefined. We here used KCTD5, the only member of the family with a known three-dimensional structure, to gain insights into the intrinsic structural stability of the C-terminal domain (CTD) and into the mutual dynamic interplay between the two domains of the protein. Molecular dynamics (MD) simulations indicate that in the simulation timescale (120 ns), the pentameric assembly of the CTD is endowed with a significant intrinsic stability. Moreover, MD analyses also led to the identification of exposed β-strand residues. Being these regions intrinsically sticky, they could be involved in the substrate recognition. More importantly, simulations conducted on the full-length protein provide interesting information of the relative motions between the BTB domain and the CTD of the protein. Indeed, the dissection of the overall motion of the protein is indicative of a large interdomain twisting associated with limited bending movements. Notably, MD data indicate that the entire interdomain motion is pivoted by a single residue (Ser150) of the hinge region that connects the domains. The functional relevance of these motions was evaluated in the context of the functional macromolecular machinery in which KCTD5 is involved. This analysis indicates that the interdomain twisting motion here characterized may be important for the correct positioning of the substrate to be ubiquitinated with respect to the other factors of the ubiquitination machinery.
Collapse
Affiliation(s)
- Daniela Barone
- a Institute of Biostructures and Bioimaging, C.N.R. , Via Mezzocannone 16, Naples I-80134 , Italy.,b Dipartimento di Scienze e Tecnologie Ambientali Biologiche e Farmaceutiche , Seconda Università di Napoli , Caserta 81100 , Italy
| | - Nicole Balasco
- a Institute of Biostructures and Bioimaging, C.N.R. , Via Mezzocannone 16, Naples I-80134 , Italy.,b Dipartimento di Scienze e Tecnologie Ambientali Biologiche e Farmaceutiche , Seconda Università di Napoli , Caserta 81100 , Italy
| | - Luigi Vitagliano
- a Institute of Biostructures and Bioimaging, C.N.R. , Via Mezzocannone 16, Naples I-80134 , Italy
| |
Collapse
|
40
|
Tang Y, Lin Y, Li C, Hu X, Liu Y, He M, Luo J, Sun G, Wang T, Li W, Guo M. MicroRNA-720 promotes in vitro cell migration by targeting Rab35 expression in cervical cancer cells. Cell Biosci 2015; 5:56. [PMID: 26413265 PMCID: PMC4583841 DOI: 10.1186/s13578-015-0047-5] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2015] [Accepted: 09/22/2015] [Indexed: 12/18/2022] Open
Abstract
Background MicroRNA-720 (miR-720), a nonclassical miRNA, is involved in the initiation and progression of several tumors. In our previous studies, miR-720 was shown to be significantly upregulated in cervical cancer tissues compared with normal cervical tissues. However, the precise biological functions of miR-720, and its molecular mechanisms of action, are still unknown. Results Microarray expression profiles, luciferase reporter assays, and western blot assays were used to validate Rab35 as a target gene of miR-720 in HEK293T and HeLa cells. The regulation of Rab35 expression by miR-720 was assessed using qRT-PCR and western blot assays, and the effects of exogenous miR-720 and Rab35 on cell migration were evaluated in vitro using Transwell® assay, wound healing assay, and real-time analyses in HeLa cells. The influences of exogenous miR-720 on cell proliferation were evaluated in vitro by the MTT assay in HeLa cells. In addition, expression of E-cadherin and vimentin associated with epithelial-mesenchymal transition were also assessed using western blot analyses after transfection of miR-720 mimics and Rab35 expression vectors. The results showed that the small GTPase, Rab35, is a direct functional target of miR-720 in cervical cancer HeLa cells. By targeting Rab35, overexpression of miR-720 resulted in a decrease in E-cadherin expression and an increase in vimentin expression and finally led to promotion of HeLa cell migration. Furthermore, reintroduction of Rab35 3′-UTR(−) markedly reversed the induction of cell migration in miR-720-expressing HeLa cells. Conclusions The miR-720 promotes cell migration of HeLa cells by downregulating Rab35. The results show that miR-720 is a novel cell migration-associated gene in cervical cancer cells. Electronic supplementary material The online version of this article (doi:10.1186/s13578-015-0047-5) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Yunlan Tang
- College of Life Sciences and State Key Laboratory of Virology, Wuhan University, 430072 Wuhan, People's Republic of China
| | - Yi Lin
- College of Life Sciences and State Key Laboratory of Virology, Wuhan University, 430072 Wuhan, People's Republic of China
| | - Chuang Li
- College of Life Sciences and State Key Laboratory of Virology, Wuhan University, 430072 Wuhan, People's Republic of China
| | - Xunwu Hu
- College of Life Sciences and State Key Laboratory of Virology, Wuhan University, 430072 Wuhan, People's Republic of China
| | - Yi Liu
- College of Life Sciences and State Key Laboratory of Virology, Wuhan University, 430072 Wuhan, People's Republic of China
| | - Mingyang He
- College of Life Sciences and State Key Laboratory of Virology, Wuhan University, 430072 Wuhan, People's Republic of China
| | - Jun Luo
- Department of Pathology, Zhongnan Hospital, Wuhan University, 430071 Wuhan, People's Republic of China
| | - Guihong Sun
- School of Basic Medical Sciences, Wuhan University, 430071 Wuhan, People's Republic of China
| | - Tao Wang
- Department of Respiratory and Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430030 Wuhan, China
| | - Wenxin Li
- College of Life Sciences and State Key Laboratory of Virology, Wuhan University, 430072 Wuhan, People's Republic of China
| | - Mingxiong Guo
- College of Life Sciences and State Key Laboratory of Virology, Wuhan University, 430072 Wuhan, People's Republic of China
| |
Collapse
|
41
|
Gervasini G, Gamero-Villarroel C. Discussing the putative role of obesity-associated genes in the etiopathogenesis of eating disorders. Pharmacogenomics 2015; 16:1287-1305. [DOI: 10.2217/pgs.15.77] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
In addition to the identification of mutations clearly related to Mendelian forms of obesity; genome-wide association studies and follow-up studies have in the last years pinpointed several loci associated with BMI. These genetic alterations are located in or near genes expressed in the hypothalamus that are involved in the regulation of eating behavior. Accordingly, it seems plausible that these SNPs, or others located in related genes, could also help develop aberrant conduct patterns that favor the establishment of eating disorders should other susceptibility factors or personality dimensions be present. However, and somewhat surprisingly, with few exceptions such as BDNF, the great majority of the genes governing these pathways remain untested in patients with anorexia nervosa, bulimia nervosa or binge-eating disorder. In the present work, we review the few existing studies, but also indications and biological concepts that point to these genes in the CNS as good candidates for association studies with eating disorder patients.
Collapse
Affiliation(s)
- Guillermo Gervasini
- Department of Medical & Surgical Therapeutics, Division of Pharmacology, Medical School, University of Extremadura, Av. Elvas s/n, E-06005, Badajoz, Spain
| | - Carmen Gamero-Villarroel
- Department of Medical & Surgical Therapeutics, Division of Pharmacology, Medical School, University of Extremadura, Av. Elvas s/n, E-06005, Badajoz, Spain
| |
Collapse
|
42
|
Cullin 3 Recognition Is Not a Universal Property among KCTD Proteins. PLoS One 2015; 10:e0126808. [PMID: 25974686 PMCID: PMC4431850 DOI: 10.1371/journal.pone.0126808] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Accepted: 04/08/2015] [Indexed: 12/13/2022] Open
Abstract
Cullin 3 (Cul3) recognition by BTB domains is a key process in protein ubiquitination. Among Cul3 binders, a great attention is currently devoted to KCTD proteins, which are implicated in fundamental biological processes. On the basis of the high similarity of BTB domains of these proteins, it has been suggested that the ability to bind Cul3 could be a general property among all KCTDs. In order to gain new insights into KCTD functionality, we here evaluated and/or quantified the binding of Cul3 to the BTB of KCTD proteins, which are known to be involved either in cullin-independent (KCTD12 and KCTD15) or in cullin-mediated (KCTD6 and KCTD11) activities. Our data indicate that KCTD6BTB and KCTD11BTB bind Cul3 with high affinity forming stable complexes with 4:4 stoichiometries. Conversely, KCTD12BTB and KCTD15BTB do not interact with Cul3, despite the high level of sequence identity with the BTB domains of cullin binding KCTDs. Intriguingly, comparative sequence analyses indicate that the capability of KCTD proteins to recognize Cul3 has been lost more than once in distinct events along the evolution. Present findings also provide interesting clues on the structural determinants of Cul3-KCTD recognition. Indeed, the characterization of a chimeric variant of KCTD11 demonstrates that the swapping of α2β3 loop between KCTD11BTB and KCTD12BTB is sufficient to abolish the ability of KCTD11BTB to bind Cul3. Finally, present findings, along with previous literature data, provide a virtually complete coverage of Cul3 binding ability of the members of the entire KCTD family.
Collapse
|
43
|
Lv D, Zhang DD, Wang H, Zhang Y, Liang L, Fu JF, Xiong F, Liu GL, Gong CX, Luo FH, Chen SK, Li ZL, Zhu YM. Genetic variations in SEC16B, MC4R, MAP2K5 and KCTD15 were associated with childhood obesity and interacted with dietary behaviors in Chinese school-age population. Gene 2015; 560:149-55. [DOI: 10.1016/j.gene.2015.01.054] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2014] [Revised: 12/21/2014] [Accepted: 01/27/2015] [Indexed: 01/20/2023]
|
44
|
Jacob C. Transcriptional control of neural crest specification into peripheral glia. Glia 2015; 63:1883-1896. [PMID: 25752517 DOI: 10.1002/glia.22816] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Revised: 01/29/2015] [Accepted: 02/20/2015] [Indexed: 12/20/2022]
Abstract
The neural crest is a transient migratory multipotent cell population that originates from the neural plate border and is formed at the end of gastrulation and during neurulation in vertebrate embryos. These cells give rise to many different cell types of the body such as chondrocytes, smooth muscle cells, endocrine cells, melanocytes, and cells of the peripheral nervous system including different subtypes of neurons and peripheral glia. Acquisition of lineage-specific markers occurs before or during migration and/or at final destination. What are the mechanisms that direct specification of neural crest cells into a specific lineage and how do neural crest cells decide on a specific migration route? Those are fascinating and complex questions that have existed for decades and are still in the research focus of developmental biologists. This review discusses transcriptional events and regulations occurring in neural crest cells and derived lineages, which control specification of peripheral glia, namely Schwann cell precursors that interact with peripheral axons and further differentiate into myelinating or nonmyelinating Schwann cells, satellite cells that remain tightly associated with neuronal cell bodies in sensory and autonomous ganglia, and olfactory ensheathing cells that wrap olfactory axons, both at the periphery in the olfactory mucosa and in the central nervous system in the olfactory bulb. Markers of the different peripheral glia lineages including intermediate multipotent cells such as boundary cap cells, as well as the functions of these specific markers, are also reviewed. Enteric ganglia, another type of peripheral glia, will not be discussed in this review. GLIA 2015;63:1883-1896.
Collapse
Affiliation(s)
- Claire Jacob
- Department of Biology, University of Fribourg, Fribourg, Switzerland
| |
Collapse
|
45
|
Liang SS, Ouyang HJ, Liu J, Chen B, Nie QH, Zhang XQ. Expression of variant transcripts of the potassium channel tetramerization domain-containing 15 (KCTD15) gene and their association with fatness traits in chickens. Domest Anim Endocrinol 2015; 50:65-71. [PMID: 25447881 DOI: 10.1016/j.domaniend.2014.09.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Revised: 09/19/2014] [Accepted: 09/22/2014] [Indexed: 12/17/2022]
Abstract
The aim of this study was to characterize the structure, expression, and biological functions of potassium channel tetramerization domain containing 15 (KCTD15) in chickens. We compared the KCTD15 expression level in samples of hypothalamic, adipose, and liver tissue of Xinghua chickens that were maintained on different dietary status. An association analysis of KCTD15 gene variant transcripts with fatness traits in a F2 resource population of chickens was performed. Three KCTD15 transcripts were identified in which the complete transcript was predominantly expressed in adipose tissue and the hypothalamus. The chicken KCTD15 gene was regulated by both feeding and fasting and consumption of a high-fat diet. The expression level of KCTD15 gene was markedly decreased in hypothalamus and liver of fasted and refed chickens (P < 0.05) and significantly downregulated in adipose tissue by the high-fat diet (P < 0.05). Three single-nucleotide polymorphisms of the KCTD15 gene were significantly associated with a number of fatness traits in chicken (P < 0.05). These results suggest that KCTD15 have a potential role regulation of obesity and fat metabolism in chickens.
Collapse
Affiliation(s)
- S S Liang
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China; Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding and Key Laboratory of Chicken Genetics, Breeding and Reproduction, Ministry of Agriculture, Guangzhou 510642, Guangdong, China
| | - H J Ouyang
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China; Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding and Key Laboratory of Chicken Genetics, Breeding and Reproduction, Ministry of Agriculture, Guangzhou 510642, Guangdong, China
| | - J Liu
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China; Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding and Key Laboratory of Chicken Genetics, Breeding and Reproduction, Ministry of Agriculture, Guangzhou 510642, Guangdong, China
| | - B Chen
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China; Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding and Key Laboratory of Chicken Genetics, Breeding and Reproduction, Ministry of Agriculture, Guangzhou 510642, Guangdong, China
| | - Q H Nie
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China; Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding and Key Laboratory of Chicken Genetics, Breeding and Reproduction, Ministry of Agriculture, Guangzhou 510642, Guangdong, China.
| | - X Q Zhang
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China; Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding and Key Laboratory of Chicken Genetics, Breeding and Reproduction, Ministry of Agriculture, Guangzhou 510642, Guangdong, China
| |
Collapse
|
46
|
Williams MJ, Goergen P, Rajendran J, Zheleznyakova G, Hägglund MG, Perland E, Bagchi S, Kalogeropoulou A, Khan Z, Fredriksson R, Schiöth HB. Obesity-linked homologues TfAP-2 and Twz establish meal frequency in Drosophila melanogaster. PLoS Genet 2014; 10:e1004499. [PMID: 25187989 PMCID: PMC4154645 DOI: 10.1371/journal.pgen.1004499] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Accepted: 05/27/2014] [Indexed: 12/21/2022] Open
Abstract
In all animals managing the size of individual meals and frequency of feeding is crucial for metabolic homeostasis. In the current study we demonstrate that the noradrenalin analogue octopamine and the cholecystokinin (CCK) homologue Drosulfakinin (Dsk) function downstream of TfAP-2 and Tiwaz (Twz) to control the number of meals in adult flies. Loss of TfAP-2 or Twz in octopaminergic neurons increased the size of individual meals, while overexpression of TfAP-2 significantly decreased meal size and increased feeding frequency. Of note, our study reveals that TfAP-2 and Twz regulate octopamine signaling to initiate feeding; then octopamine, in a negative feedback loop, induces expression of Dsk to inhibit consummatory behavior. Intriguingly, we found that the mouse TfAP-2 and Twz homologues, AP-2β and Kctd15, co-localize in areas of the brain known to regulate feeding behavior and reward, and a proximity ligation assay (PLA) demonstrated that AP-2β and Kctd15 interact directly in a mouse hypothalamus-derived cell line. Finally, we show that in this mouse hypothalamic cell line AP-2β and Kctd15 directly interact with Ube2i, a mouse sumoylation enzyme, and that AP-2β may itself be sumoylated. Our study reveals how two obesity-linked homologues regulate metabolic homeostasis by modulating consummatory behavior. The size of individual meals and feeding frequency are important for homeostatic control. Due to the complex neuroendocrine system regulating human food intake it is difficult to uncover the mechanisms underlying eating disorders. The genetically tractable model system Drosophila melanogaster has a comparatively simple brain; yet, similar to humans, its eating behavior can adapt to respond to nutritional needs. Our study describes how the obesity-linked homologues TfAP-2 (human TFAP2B) and Tiwaz (human KCTD15) regulate a unique feedback system involving noradrenalin-like octopamine and the CCK homolog Dsk, that exert positive and negative effects on Drosophila feeding behavior. Our findings provide insight into how two conserved obesity-linked genes regulate feeding behavior in order to maintain metabolic balance.
Collapse
Affiliation(s)
- Michael J. Williams
- Functional Pharmacology, Department of Neuroscience, Uppsala University, Uppsala, Sweden
- * E-mail:
| | - Philip Goergen
- Functional Pharmacology, Department of Neuroscience, Uppsala University, Uppsala, Sweden
| | - Jayasimman Rajendran
- Functional Pharmacology, Department of Neuroscience, Uppsala University, Uppsala, Sweden
| | - Galina Zheleznyakova
- Functional Pharmacology, Department of Neuroscience, Uppsala University, Uppsala, Sweden
| | - Maria G. Hägglund
- Functional Pharmacology, Department of Neuroscience, Uppsala University, Uppsala, Sweden
| | - Emelie Perland
- Functional Pharmacology, Department of Neuroscience, Uppsala University, Uppsala, Sweden
| | - Sonchita Bagchi
- Functional Pharmacology, Department of Neuroscience, Uppsala University, Uppsala, Sweden
| | - Argyro Kalogeropoulou
- Functional Pharmacology, Department of Neuroscience, Uppsala University, Uppsala, Sweden
| | - Zaid Khan
- Functional Pharmacology, Department of Neuroscience, Uppsala University, Uppsala, Sweden
| | - Robert Fredriksson
- Functional Pharmacology, Department of Neuroscience, Uppsala University, Uppsala, Sweden
| | - Helgi B. Schiöth
- Functional Pharmacology, Department of Neuroscience, Uppsala University, Uppsala, Sweden
| |
Collapse
|
47
|
Molecular recognition of Cullin3 by KCTDs: insights from experimental and computational investigations. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2014; 1844:1289-98. [PMID: 24747150 DOI: 10.1016/j.bbapap.2014.04.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Revised: 03/26/2014] [Accepted: 04/09/2014] [Indexed: 02/08/2023]
Abstract
Recent investigations have highlighted a key role of the proteins of the KCTD (K-potassium channel tetramerization domain containing proteins) family in several fundamental biological processes. Despite the growing importance of KCTDs, our current understanding of their biophysical and structural properties is very limited. Biochemical characterizations of these proteins have shown that most of them act as substrate adaptor in E3 ligases during protein ubiquitination. Here we present a characterization of the KCTD5-Cullin3 interactions which are mediated by the KCTD5 BTB domain. Isothermal titration calorimetry experiments reveal that KCTD5 avidly binds the Cullin3 (Cul3). The complex presents a 5:5 stoichiometry and a dissociation constant of 59 nM. Molecular modeling and molecular dynamics simulations clearly indicate that the two proteins form a stable (KCTD5-Cul3)(5) pinwheel-shaped heterodecamer in which two distinct KCTD5 subunits cooperate in the binding of each cullin chain. Molecular dynamics simulations indicate that different types of interactions contribute to the stability of the assembly. Interestingly, residues involved in Cul3 recognitions are conserved in the KCTD5 orthologs and paralogs implicated in important biological processes. These residues are also rather well preserved in most of the other KCTD proteins. By using molecular modeling techniques, the entire ubiquitination system including the E3 ligase, the E2 conjugating enzyme and ubiquitin was generated. The analysis of the molecular architecture of this complex machinery provides insights into the ubiquitination processes which involve E3 ligases with a high structural complexity.
Collapse
|
48
|
Li X, Chen C, Wang F, Huang W, Liang Z, Xiao Y, Wei K, Wan Z, Hu X, Xiang S, Ding X, Zhang J. KCTD1 suppresses canonical Wnt signaling pathway by enhancing β-catenin degradation. PLoS One 2014; 9:e94343. [PMID: 24736394 PMCID: PMC3988066 DOI: 10.1371/journal.pone.0094343] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Accepted: 03/12/2014] [Indexed: 11/18/2022] Open
Abstract
The canonical Wnt signaling pathway controls normal embryonic development, cellular proliferation and growth, and its aberrant activity results in human carcinogenesis. The core component in regulation of this pathway is β-catenin, but molecular regulation mechanisms of β-catenin stability are not completely known. Here, our recent studies have shown that KCTD1 strongly inhibits TCF/LEF reporter activity. Moreover, KCTD1 interacted with β-catenin both in vivo by co-immunoprecipitation as well as in vitro through GST pull-down assays. We further mapped the interaction regions to the 1-9 armadillo repeats of β-catenin and the BTB domain of KCTD1, especially Position Ala-30 and His-33. Immunofluorescence analysis indicated that KCTD1 promotes the cytoplasmic accumulation of β-catenin. Furthermore, protein stability assays revealed that KCTD1 enhances the ubiquitination/degradation of β-catenin in a concentration-dependent manner in HeLa cells. And the degradation of β-catenin mediated by KCTD1 was alleviated by the proteasome inhibitor, MG132. In addition, KCTD1-mediated β-catenin degradation was dependent on casein kinase 1 (CK1)- and glycogen synthase kinase-3β (GSK-3β)-mediated phosphorylation and enhanced by the E3 ubiquitin ligase β-transducin repeat-containing protein (β-TrCP). Moreover, KCTD1 suppressed the expression of endogenous Wnt downstream genes and transcription factor AP-2α. Finally, we found that Wnt pathway member APC and tumor suppressor p53 influence KCTD1-mediated downregulation of β-catenin. These results suggest that KCTD1 functions as a novel inhibitor of Wnt signaling pathway.
Collapse
Affiliation(s)
- Xinxin Li
- Key Laboratory of Protein Chemistry and Development Biology of State Education Ministry of China, College of Life Science, Hunan Normal University, Changsha, China
| | - Cheng Chen
- Key Laboratory of Protein Chemistry and Development Biology of State Education Ministry of China, College of Life Science, Hunan Normal University, Changsha, China
| | - Fangmei Wang
- Key Laboratory of Protein Chemistry and Development Biology of State Education Ministry of China, College of Life Science, Hunan Normal University, Changsha, China
| | - Wenhuan Huang
- Key Laboratory of Protein Chemistry and Development Biology of State Education Ministry of China, College of Life Science, Hunan Normal University, Changsha, China
| | - Zhongheng Liang
- Key Laboratory of Protein Chemistry and Development Biology of State Education Ministry of China, College of Life Science, Hunan Normal University, Changsha, China
| | - Yuzhong Xiao
- Key Laboratory of Protein Chemistry and Development Biology of State Education Ministry of China, College of Life Science, Hunan Normal University, Changsha, China
| | - Ke Wei
- Key Laboratory of Protein Chemistry and Development Biology of State Education Ministry of China, College of Life Science, Hunan Normal University, Changsha, China
| | - Zhenxing Wan
- Key Laboratory of Protein Chemistry and Development Biology of State Education Ministry of China, College of Life Science, Hunan Normal University, Changsha, China
| | - Xiang Hu
- Key Laboratory of Protein Chemistry and Development Biology of State Education Ministry of China, College of Life Science, Hunan Normal University, Changsha, China
| | - Shuanglin Xiang
- Key Laboratory of Protein Chemistry and Development Biology of State Education Ministry of China, College of Life Science, Hunan Normal University, Changsha, China
| | - Xiaofeng Ding
- Key Laboratory of Protein Chemistry and Development Biology of State Education Ministry of China, College of Life Science, Hunan Normal University, Changsha, China
- * E-mail:
| | - Jian Zhang
- Key Laboratory of Protein Chemistry and Development Biology of State Education Ministry of China, College of Life Science, Hunan Normal University, Changsha, China
| |
Collapse
|
49
|
Regulation of aggression by obesity-linked genes TfAP-2 and Twz through octopamine signaling in Drosophila. Genetics 2013; 196:349-62. [PMID: 24142897 DOI: 10.1534/genetics.113.158402] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
In Drosophila, the monoamine octopamine, through mechanisms that are not completely understood, regulates both aggression and mating behavior. Interestingly, our study demonstrates that the Drosophila obesity-linked homologs Transcription factor AP-2 (TfAP-2; TFAP2B in humans) and Tiwaz (Twz; KCTD15 in humans) interact to modify male behavior by controlling the expression of Tyramine β-hydroxylase and Vesicular monanime transporter, genes necessary for octopamine production and secretion. Furthermore, we reveal that octopamine in turn regulates aggression through the Drosophila cholecystokinin satiation hormone homolog Drosulfakinin (Dsk). Finally, we establish that TfAP-2 is expressed in octopaminergic neurons known to control aggressive behavior and that TfAP-2 requires functional Twz for its activity. We conclude that genetically manipulating the obesity-linked homologs TfAP-2 and Twz is sufficient to affect octopamine signaling, which in turn modulates Drosophila male behavior through the regulation of the satiation hormone Dsk.
Collapse
|
50
|
Zarelli VE, Dawid IB. The BTB-containing protein Kctd15 is SUMOylated in vivo. PLoS One 2013; 8:e75016. [PMID: 24086424 PMCID: PMC3782465 DOI: 10.1371/journal.pone.0075016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Accepted: 08/10/2013] [Indexed: 12/18/2022] Open
Abstract
Potassium Channel Tetramerization Domain containing 15 (Kctd15) has a role in regulating the neural crest (NC) domain in the embryo. Kctd15 inhibits NC induction by antagonizing Wnt signaling and by interaction with the transcription factor AP-2α activation domain blocking its activity. Here we demonstrate that Kctd15 is SUMOylated by SUMO1 and SUMO2/3. Kctd15 contains a classical SUMO interacting motif, ψKxE, at the C-terminal end, and variants of the motif within the molecule. Kctd15 SUMOylation occurs exclusively in the C-terminal motif. Inability to be SUMOylated did not affect Kctd15's subcellular localization, or its ability to repress AP-2 transcriptional activity and to inhibit NC formation in zebrafish embryos. In contrast, a fusion of Kctd15 and SUMO had little effectiveness in AP-2 inhibition and in blocking of NC formation. These data suggest that the non-SUMOylated form of Kctd15 functions in NC development.
Collapse
Affiliation(s)
- Valeria E. Zarelli
- Program in Genomics of Differentiation, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Igor B. Dawid
- Program in Genomics of Differentiation, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland, United States of America
- * E-mail:
| |
Collapse
|