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Allen AK, Bai X, Davis ES, Fabritius A, Jaramillo-Lambert A, Kropp PA, Richie CT, Schumacher JM, Shrestha S, Stein K, Corsi AK. Andy Golden: Mentorship through the Years. J Dev Biol 2023; 11:41. [PMID: 37987371 PMCID: PMC10660481 DOI: 10.3390/jdb11040041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Accepted: 10/24/2023] [Indexed: 11/22/2023] Open
Abstract
The C [...].
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Affiliation(s)
- Anna K. Allen
- Directorate for Biological Sciences, National Science Foundation, Alexandria, VA 22314, USA;
- Department of Biology, Howard University, Washington, DC 20059, USA
| | - Xiaofei Bai
- Department of Biology, Genetics Institute, University of Florida, Gainesville, FL 32610, USA;
| | | | - Amy Fabritius
- Department of Molecular and Cellular Biology, University of California, Davis, CA 95616, USA;
| | | | - Peter A. Kropp
- Department of Biology, Kenyon College, Gambier, OH 43022, USA;
| | | | - Jill M. Schumacher
- Department of Genetics, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Sanjay Shrestha
- Medical Sciences, Indiana University School of Medicine-Bloomington, Bloomington, IN 47405, USA;
| | - Kathryn Stein
- Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD), NIH, Bethesda, MD 20817, USA;
| | - Ann K. Corsi
- Department of Biology, The Catholic University of America, Washington, DC 20064, USA
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Kropp PA, Rogers P, Kelly SE, McWhirter R, Goff WD, Levitan IM, Miller DM, Golden A. Patient-specific variants of NFU1/NFU-1 disrupt cholinergic signaling in a model of multiple mitochondrial dysfunctions syndrome 1. Dis Model Mech 2023; 16:286662. [PMID: 36645076 PMCID: PMC9922734 DOI: 10.1242/dmm.049594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 01/05/2023] [Indexed: 01/17/2023] Open
Abstract
Neuromuscular dysfunction is a common feature of mitochondrial diseases and frequently presents as ataxia, spasticity and/or dystonia, all of which can severely impact individuals with mitochondrial diseases. Dystonia is one of the most common symptoms of multiple mitochondrial dysfunctions syndrome 1 (MMDS1), a disease associated with mutations in the causative gene (NFU1) that impair iron-sulfur cluster biogenesis. We have generated Caenorhabditis elegans strains that recreated patient-specific point variants in the C. elegans ortholog (nfu-1) that result in allele-specific dysfunction. Each of these mutants, Gly147Arg and Gly166Cys, have altered acetylcholine signaling at neuromuscular junctions, but opposite effects on activity and motility. We found that the Gly147Arg variant was hypersensitive to acetylcholine and that knockdown of acetylcholine release rescued nearly all neuromuscular phenotypes of this variant. In contrast, we found that the Gly166Cys variant caused predominantly postsynaptic acetylcholine hypersensitivity due to an unclear mechanism. These results are important for understanding the neuromuscular conditions of MMDS1 patients and potential avenues for therapeutic intervention.
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Affiliation(s)
- Peter A Kropp
- Laboratory of Biochemistry and Genetics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA.,Biology Department, Kenyon College, Gambier, OH 43022, USA
| | - Philippa Rogers
- Laboratory of Biochemistry and Genetics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Sydney E Kelly
- Laboratory of Biochemistry and Genetics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Rebecca McWhirter
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN 37235, USA
| | - Willow D Goff
- Laboratory of Biochemistry and Genetics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA.,Biology Department, Colgate University, Hamilton, NY 13346, USA
| | - Ian M Levitan
- Laboratory of Biochemistry and Genetics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - David M Miller
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN 37235, USA.,Neuroscience Graduate Program, Vanderbilt University, Nashville, TN 37235, USA
| | - Andy Golden
- Laboratory of Biochemistry and Genetics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA
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Iyer J, Gentry LK, Bergwell M, Smith A, Guagliardo S, Kropp PA, Sankaralingam P, Liu Y, Spooner E, Bowerman B, O’Connell KF. The chromatin remodeling protein CHD-1 and the EFL-1/DPL-1 transcription factor cooperatively down regulate CDK-2 to control SAS-6 levels and centriole number. PLoS Genet 2022; 18:e1009799. [PMID: 35377871 PMCID: PMC9009770 DOI: 10.1371/journal.pgen.1009799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 04/14/2022] [Accepted: 03/17/2022] [Indexed: 11/24/2022] Open
Abstract
Centrioles are submicron-scale, barrel-shaped organelles typically found in pairs, and play important roles in ciliogenesis and bipolar spindle assembly. In general, successful execution of centriole-dependent processes is highly reliant on the ability of the cell to stringently control centriole number. This in turn is mainly achieved through the precise duplication of centrioles during each S phase. Aberrations in centriole duplication disrupt spindle assembly and cilia-based signaling and have been linked to cancer, primary microcephaly and a variety of growth disorders. Studies aimed at understanding how centriole duplication is controlled have mainly focused on the post-translational regulation of two key components of this pathway: the master regulatory kinase ZYG-1/Plk4 and the scaffold component SAS-6. In contrast, how transcriptional control mechanisms might contribute to this process have not been well explored. Here we show that the chromatin remodeling protein CHD-1 contributes to the regulation of centriole duplication in the C. elegans embryo. Specifically, we find that loss of CHD-1 or inactivation of its ATPase activity can restore embryonic viability and centriole duplication to a strain expressing insufficient ZYG-1 activity. Interestingly, loss of CHD-1 is associated with increases in the levels of two ZYG-1-binding partners: SPD-2, the centriole receptor for ZYG-1 and SAS-6. Finally, we explore transcriptional regulatory networks governing centriole duplication and find that CHD-1 and a second transcription factor, EFL-1/DPL-1 cooperate to down regulate expression of CDK-2, which in turn promotes SAS-6 protein levels. Disruption of this regulatory network results in the overexpression of SAS-6 and the production of extra centrioles. Centrioles are cellular constituents that play an important role in cell reproduction, signaling and movement. To properly function, centrioles must be present in the cell at precise numbers. Errors in maintaining centriole number result in cell division defects and diseases such as cancer and microcephaly. How the cell maintains proper centriole copy number is not entirely understood. Here we show that two transcription factors, EFL-1/DPL-1 and CHD-1 cooperate to reduce expression of CDK-2, a master regulator of the cell cycle. We find that CDK-2 in turn promotes expression of SAS-6, a major building block of centrioles. When EFL-1/DPL-1 and CHD-1 are inhibited, CDK-2 is overexpressed. This leads to increased levels of SAS-6 and excess centrioles. Our work thus demonstrates a novel mechanism for controlling centriole number and is thus relevant to those human diseases caused by defects in centriole copy number control.
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Affiliation(s)
- Jyoti Iyer
- Department of Chemistry and Biochemistry, University of Tulsa, Tulsa, Oklahoma, United States of America
- * E-mail: (JI); (KFO)
| | - Lindsey K. Gentry
- Laboratory of Biochemistry and Genetics, National Institutes of Diabetes and Digestive and Kidney Diseases, NIH, Bethesda, Maryland, United States of America
| | - Mary Bergwell
- Department of Chemistry and Biochemistry, University of Tulsa, Tulsa, Oklahoma, United States of America
| | - Amy Smith
- Department of Chemistry and Biochemistry, University of Tulsa, Tulsa, Oklahoma, United States of America
| | - Sarah Guagliardo
- Laboratory of Biochemistry and Genetics, National Institutes of Diabetes and Digestive and Kidney Diseases, NIH, Bethesda, Maryland, United States of America
| | - Peter A. Kropp
- Laboratory of Biochemistry and Genetics, National Institutes of Diabetes and Digestive and Kidney Diseases, NIH, Bethesda, Maryland, United States of America
| | - Prabhu Sankaralingam
- Laboratory of Biochemistry and Genetics, National Institutes of Diabetes and Digestive and Kidney Diseases, NIH, Bethesda, Maryland, United States of America
| | - Yan Liu
- Laboratory of Biochemistry and Genetics, National Institutes of Diabetes and Digestive and Kidney Diseases, NIH, Bethesda, Maryland, United States of America
| | - Eric Spooner
- Proteomics Core Facility, Whitehead Institute for Biomedical Research, Cambridge Massachusetts, United States of America
| | - Bruce Bowerman
- Institute of Molecular Biology, University of Oregon, Eugene, Oregon, United States of America
| | - Kevin F. O’Connell
- Laboratory of Biochemistry and Genetics, National Institutes of Diabetes and Digestive and Kidney Diseases, NIH, Bethesda, Maryland, United States of America
- * E-mail: (JI); (KFO)
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Abstract
Although nearly 10% of Americans suffer from a rare disease, clinical progress in individual rare diseases is severely compromised by lack of attention and research resources compared to common diseases. It is thus imperative to investigate these diseases at their most basic level to build a foundation and provide the opportunity for understanding their mechanisms and phenotypes, as well as potential treatments. One strategy for effectively and efficiently studying rare diseases is using genetically tractable organisms to model the disease and learn about the essential cellular processes affected. Beyond investigating dysfunctional cellular processes, modeling rare diseases in simple organisms presents the opportunity to screen for pharmacological or genetic factors capable of ameliorating disease phenotypes. Among the small model organisms that excel in rare disease modeling is the nematode Caenorhabditis elegans. With a staggering breadth of research tools, C. elegans provides an ideal system in which to study human disease. Molecular and cellular processes can be easily elucidated, assayed and altered in ways that can be directly translated to humans. When paired with other model organisms and collaborative efforts with clinicians, the power of these C. elegans studies cannot be overstated. This Review highlights studies that have used C. elegans in diverse ways to understand rare diseases and aid in the development of treatments. With continuing and advancing technologies, the capabilities of this small round worm will continue to yield meaningful and clinically relevant information for human health.
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Affiliation(s)
| | | | | | | | - Andy Golden
- Laboratory of Biochemistry and Genetics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA
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Kropp PA, Rushing GV, Brockman AA, Yu ENZ, Ihrie RA, Gannon M. Unexpected effects of ivermectin and selamectin on inducible Cre ER activity in mice. Lab Anim Res 2020; 36:36. [PMID: 33042783 PMCID: PMC7542348 DOI: 10.1186/s42826-020-00069-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 09/28/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Anti-parasitics are frequently used in research animal facilities to treat a multitude of common infections, with pinworms and fur mites being amongst the most common. Ivermectin and selamectin are common oral and topical treatments for these infections, respectively. Although commonly thought to be innocuous to both the research animals and any transgenic elements that the animals may carry, evidence exists that ivermectin is capable of activating the recombinase activity of at least one CreER. The goal of the current study was to determine if there was an effect of either anti-parasitic agent on the activity of CreER proteins in transgenic mice. CASE PRESENTATION We analyzed the offspring of transgenic mice exposed to either ivermectin or selamectin during pregnancy and nursing. Through analysis of reporter genes co-expressed with multiple, independently generated transgenic CreER drivers, we report here that ivermectin and selamectin both alter recombinase activity and thus may have unintended consequences on gene inactivation studies in mice. CONCLUSIONS Although the mechanisms by which ivermectin and selamectin affect CreER activity in the offspring of treated dams remain unclear, the implications are important nonetheless. Treatment of pregnant transgenic mice with these anti-parasitics has the potential to alter transgene activity in the offspring. Special considerations should be made when planning treatment of transgenic mice with either of these pharmacologics.
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Affiliation(s)
- Peter A. Kropp
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN USA
- Present Address: Laboratory of Biochemistry and Genetics, National Institutes of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20886 USA
| | | | - Asa A. Brockman
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN USA
| | - Erin N. Z. Yu
- Department of Pathology, Immunology and Microbiology, Vanderbilt University Medical Center, Nashville, TN USA
| | - Rebecca A. Ihrie
- Neuroscience Program, Vanderbilt University, Nashville, TN USA
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN USA
- Department of Neurological Surgery, Vanderbilt University Medical Center, Nashville, TN USA
| | - Maureen Gannon
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN USA
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN USA
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN USA
- Department of Veteran’s Affairs, Tennessee Valley Health Authority, Nashville, TN USA
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Kropp PA, Dunn JC, Carboneau BA, Stoffers DA, Gannon M. Cooperative function of Pdx1 and Oc1 in multipotent pancreatic progenitors impacts postnatal islet maturation and adaptability. Am J Physiol Endocrinol Metab 2018; 314:E308-E321. [PMID: 29351489 PMCID: PMC5966755 DOI: 10.1152/ajpendo.00260.2017] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The transcription factors pancreatic and duodenal homeobox 1 (Pdx1) and onecut1 (Oc1) are coexpressed in multipotent pancreatic progenitors (MPCs), but their expression patterns diverge in hormone-expressing cells, with Oc1 expression being extinguished in the endocrine lineage and Pdx1 being maintained at high levels in β-cells. We previously demonstrated that cooperative function of these two factors in MPCs is necessary for proper specification and differentiation of pancreatic endocrine cells. In those studies, we observed a persistent decrease in expression of the β-cell maturity factor MafA. We therefore hypothesized that Pdx1 and Oc1 cooperativity in MPCs impacts postnatal β-cell maturation and function. Here our model of Pdx1-Oc1 double heterozygosity was used to investigate the impact of haploinsufficiency for both of these factors on postnatal β-cell maturation, function, and adaptability. Examining mice at postnatal day (P) 14, we observed alterations in pancreatic insulin content in both Pdx1 heterozygotes and double heterozygotes. Gene expression analysis at this age revealed significantly decreased expression of many genes important for glucose-stimulated insulin secretion (e.g., Glut2, Pcsk1/2, Abcc8) exclusively in double heterozygotes. Analysis of P14 islets revealed an increase in the number of mixed islets in double heterozygotes. We predicted that double-heterozygous β-cells would have an impaired ability to respond to stress. Indeed, we observed that β-cell proliferation fails to increase in double heterozygotes in response to either high-fat diet or placental lactogen. We thus report here the importance of cooperation between regulatory factors early in development for postnatal islet maturation and adaptability.
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Affiliation(s)
- Peter A Kropp
- Department of Molecular Physiology and Biophysics, Vanderbilt University , Nashville, Tennessee
| | - Jennifer C Dunn
- Department of Veterans Affairs, Tennessee Valley Health Authority, Vanderbilt University , Nashville, Tennessee
- Department of Medicine, Vanderbilt University , Nashville, Tennessee
| | - Bethany A Carboneau
- Department of Veterans Affairs, Tennessee Valley Health Authority, Vanderbilt University , Nashville, Tennessee
- Department of Molecular Physiology and Biophysics, Vanderbilt University , Nashville, Tennessee
| | - Doris A Stoffers
- Department of Medicine, Institute for Diabetes, Obesity, and Metabolism, Perelman School of Medicine, University of Pennsylvania , Philadelphia, Pennsylvania
| | - Maureen Gannon
- Department of Veterans Affairs, Tennessee Valley Health Authority, Vanderbilt University , Nashville, Tennessee
- Department of Molecular Physiology and Biophysics, Vanderbilt University , Nashville, Tennessee
- Department of Medicine, Vanderbilt University , Nashville, Tennessee
- Department of Cell and Developmental Biology, Vanderbilt University , Nashville, Tennessee
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Henley KD, Stanescu DE, Kropp PA, Wright CVE, Won KJ, Stoffers DA, Gannon M. Threshold-Dependent Cooperativity of Pdx1 and Oc1 in Pancreatic Progenitors Establishes Competency for Endocrine Differentiation and β-Cell Function. Cell Rep 2016; 15:2637-2650. [PMID: 27292642 DOI: 10.1016/j.celrep.2016.05.040] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Revised: 02/26/2016] [Accepted: 05/09/2016] [Indexed: 02/06/2023] Open
Abstract
Pdx1 and Oc1 are co-expressed in multipotent pancreatic progenitors and regulate the pro-endocrine gene Neurog3. Their expression diverges in later organogenesis, with Oc1 absent from hormone+ cells and Pdx1 maintained in mature β cells. In a classical genetic test for cooperative functional interactions, we derived mice with combined Pdx1 and Oc1 heterozygosity. Endocrine development in double-heterozygous pancreata was normal at embryonic day (E)13.5, but defects in specification and differentiation were apparent at E15.5, the height of the second wave of differentiation. Pancreata from double heterozygotes showed alterations in the expression of genes crucial for β-cell development and function, decreased numbers and altered allocation of Neurog3-expressing endocrine progenitors, and defective endocrine differentiation. Defects in islet gene expression and β-cell function persisted in double heterozygous neonates. These results suggest that Oc1 and Pdx1 cooperate prior to their divergence, in pancreatic progenitors, to allow for proper differentiation and functional maturation of β cells.
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Affiliation(s)
- Kathryn D Henley
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN 37232.,Program in Developmental Biology, Vanderbilt University, Nashville, TN 37232
| | - Diana E Stanescu
- Institute for Diabetes, Obesity and Metabolism and the Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104.,Division of Endocrinology and Diabetes, The Children's Hospital of Philadelphia, Philadelphia PA 19104
| | - Peter A Kropp
- Program in Developmental Biology, Vanderbilt University, Nashville, TN 37232.,Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN 37232
| | - Christopher V E Wright
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN 37232.,Program in Developmental Biology, Vanderbilt University, Nashville, TN 37232
| | - Kyoung-Jae Won
- Institute for Diabetes, Obesity and Metabolism and the Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Doris A Stoffers
- Institute for Diabetes, Obesity and Metabolism and the Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Maureen Gannon
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN 37232.,Program in Developmental Biology, Vanderbilt University, Nashville, TN 37232.,Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN 37232.,Department of Medicine, Vanderbilt University, Nashville, TN 37232.,Department of Veterans Affairs, Tennessee Valley Health Authority, Vanderbilt University, Nashville, TN 37212
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Kropp PA, Gannon M. Onecut transcription factors in development and disease. Trends Dev Biol 2016; 9:43-57. [PMID: 28018056 PMCID: PMC5176019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Developmental processes are remarkably well conserved among species, and among the most highly conserved developmental regulators are transcription factor families. The Onecut transcription factor family consists of three members known for their single "cut" DNA-binding domain and an aberrant homeodomain. The three members of the Onecut family are highly conserved from Drosophila to humans and have significant roles in regulating the development of diverse tissues derived from the ectoderm or endoderm, where they activate a number of gene families. Of note, the genetic interaction between Onecut family members and Neurogenin genes appears to be essential in multiple tissues for proper specification and development of unique cell types. This review highlights the importance of the Onecut factors in cell fate specification and organogenesis, highlighting their role in vertebrates, and discusses their role in the maintenance of cell fate and prevention of disease. We cover the essential spatial and temporal control of Onecut factor expression and how this tight regulation is required for proper specification and subsequent terminal differentiation of multiple tissue types including those within the retina, central nervous system, liver and pancreas. Beyond development, Onecut factors perform necessary functions in mature cell types; their misregulation can contribute to diseases such as pancreatic cancer. Given the importance of this family of transcription factors in development and disease, their consideration in essential transcription factor networks is underappreciated.
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Affiliation(s)
- Peter A. Kropp
- Department of Molecular Physiology and Biophysicsm Vanderbilt University, Nashville, TN
- Program in Developmental Biology, Vanderbilt University, Nashville, TN
| | - Maureen Gannon
- Department of Molecular Physiology and Biophysicsm Vanderbilt University, Nashville, TN
- Department of Medicine, Vanderbilt University, Nashville, TN
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN
- Program in Developmental Biology, Vanderbilt University, Nashville, TN
- Department of Veterans Affairs, Tennessee Valley Health Authority, Nashville, TN, USA
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