Functional Redundancy Between Trans-Golgi Network Snare Family Members In Arabidopsis Thaliana, 2017 Iowa State University
Functional Redundancy Between Trans-Golgi Network Snare Family Members In Arabidopsis Thaliana, Sang-Jin Kim, Diane C. Bassham
Vesicle fusion is an essential process for maintaining the structure and function of the endomembrane system. Fusion is mediated by t-SNARE (soluble N-ethylmaleimide-sensitive factor attachment protein receptor) fusion proteins on the target membrane and v-SNAREs on the vesicle membrane; v-and t-SNAREs interact with each other, driving vesicle fusion with the target membrane. The Arabidopsis thaliana trans-Golgi network resident SNAREs SYP41 and VTI12, along with YKT61/62, have been shown to function in vesicle fusion in vitro, consistent with immunoprecipitation results showing their interaction in Arabidopsis cell extracts. Conflicting published results have indicated that SYP4 family members are ...
Guidelines For The Use And Interpretation Of Assays For Monitoring Autophagy In Higher Eukaryotes, 2017 University of Michigan-Ann Arbor
Guidelines For The Use And Interpretation Of Assays For Monitoring Autophagy In Higher Eukaryotes, Daniel J. Klionsky, Michael J. Lenardo, Diane C. Bassham
Research in autophagy continues to accelerate,1 and as a result many new scientists are entering the field. Accordingly, it is important to establish a standard set of criteria for monitoring macroautophagy in different organisms. Recent reviews have described the range of assays that have been used for this purpose.2,3 There are many useful and convenient methods that can be used to monitor macroautophagy in yeast, but relatively few in other model systems, and there is much confusion regarding acceptable methods to measure macroautophagy in higher eukaryotes. A key point that needs to be emphasized is that there ...
Autophagy In Plants And Algae, 2017 Iowa State University
Autophagy In Plants And Algae, Diane C. Bassham, Jose L. Crespo
Autophagy is a major cellular degradation pathway in which materials are delivered to the vacuole in double-membrane vesicles known as autophagosomes, broken down, and recycled (Li and Vierstra, 2012; Liu and Bassham, 2012). In photosynthetic organisms, the pathway is strongly activated by biotic and abiotic stresses, including nutrient limitation, oxidative, salt and drought stress and pathogen infection, and during senescence (Perez-Perez et al., 2012; Lv et al., 2014). Mutation of genes required for autophagy causes hypersensitivity to stress, indicating that autophagy is important for tolerance of multiple stresses. While autophagy is often non-selective, a growing number of examples of selectivity ...
Guidelines For The Use And Interpretation Of Assays For Monitoring Autophagy, 2017 University of Michigan-Ann Arbor
Guidelines For The Use And Interpretation Of Assays For Monitoring Autophagy, Daniel J. Klionsky, Shoba Amarnath, Vellareddy Anantharam, Diane C. Bassham, Bryan Bellaire
In 2008 we published the first set of guidelines for standardizing research in autophagy. Since then, research on this topic has continued to accelerate, and many new scientists have entered the field. Our knowledge base and relevant new technologies have also been expanding. Accordingly, it is important to update these guidelines for monitoring autophagy in different organisms. Various reviews have described the range of assays that have been used for this purpose. Nevertheless, there continues to be confusion regarding acceptable methods to measure autophagy, especially in multicellular eukaryotes. A key point that needs to be emphasized is that there is ...
Antisense Oligonucleotides Used To Target The Dux4 Mrna As Therapeutic Approaches In Faciosscapulohumeral Muscular Dystrophy (Fshd), Eugenie Ansseau, Celine Vanderplanck, Armelle Wauters, Scott Q. Harper, Frederique Coppee, Alexandra Belayew
Wellstone Center for FSHD Publications and Presentations
FacioScapuloHumeral muscular Dystrophy (FSHD) is one of the most prevalent hereditary myopathies and is generally characterized by progressive muscle atrophy affecting the face, scapular fixators; upper arms and distal lower legs. The FSHD locus maps to a macrosatellite D4Z4 repeat array on chromosome 4q35. Each D4Z4 unit contains a DUX4 gene; the most distal of which is flanked by a polyadenylation site on FSHD-permissive alleles, which allows for production of stable DUX4 mRNAs. In addition, an open chromatin structure is required for DUX4 gene transcription. FSHD thus results from a gain of function of the toxic DUX4 protein that normally ...
Transcriptional And Post-Transcriptional Regulation Of Histone Variant H2a.Z During Sea Urchin Development, 2017 The Graduate Center, City University of New York
Transcriptional And Post-Transcriptional Regulation Of Histone Variant H2a.Z During Sea Urchin Development, Mihai Hajdu
All Graduate Works by Year: Dissertations, Theses, and Capstone Projects
Histone variant H2A.Z promotes chromatin accessibility at transcriptional regulatory elements and is developmentally regulated in metazoans. We characterize the transcriptional and post-transcriptional regulation of H2A.Z in the purple sea urchin Strongylocentrotus purpuratus. H2A.Z depletion by antisense translation-blocking morpholino oligonucleotides during early development causes developmental collapse, in agreement with its previously demonstrated general role in transcriptional multipotency. During H2A.Z peak expression in 24-h embryos, endogenous H2A.Z 3’ UTR sequences stabilize GFP mRNAs relative to those with SV40 3’ UTR sequences, although the 3’UTR of H2A.Z does not determine the spatial distribution of H2A.Z ...
Mammary Extracellular Matrix Directs Differentiation Of Testicular And Embryonic Stem Cells To Form Functional Mammary Glands In Vivo, Robert D. Bruno, Jodie M. Fleming, Andrea L. George, Corinne A. Boulanger, Pepper Schedin, Gilbert H. Smith
Medical Diagnostics & Translational Sciences Faculty Publications
Previously, we demonstrated the ability of the normal mammary microenvironment (niche) to direct non-mammary cells including testicular and embryonic stem cells (ESCs) to adopt a mammary epithelial cell (MEC) fate. These studies relied upon the interaction of transplanted normal MECs with non-mammary cells within the mammary fat-pads of recipient mice that had their endogenous epithelium removed. Here, we tested whether acellular mammary extracellular matrix (mECM) preparations are sufficient to direct differentiation of testicular-derived cells and ESCs to form functional mammary epithelial trees in vivo. We found that mECMs isolated from adult mice and rats were sufficient to redirect testicular derived ...
Histone Deacetylase 3 Coordinates Heart Development Through Stage-Specific Roles In Cardiac Progenitor Cells, 2016 University of Massachusetts Medical School
Histone Deacetylase 3 Coordinates Heart Development Through Stage-Specific Roles In Cardiac Progenitor Cells, Sara L. Lewandowski
GSBS Dissertations and Theses
Disruptions in cardiac development cause congenital heart disease, the most prevalent and deadly congenital malformation. Genetic and environmental factors are thought to contribute to these defects, however molecular mechanisms remain largely undefined. Recent work highlighted potential roles of chromatin- modifying enzymes in congenital heart disease pathogenesis. Histone deacetylases, a class of chromatin-modifying enzymes, have developmental importance and recognized roles in the mature heart. This thesis aimed to characterize functions of Hdac3 in cardiac development. We found loss of Hdac3 in the primary heart field causes precocious progenitor cell differentiation, resulting in hypoplastic ventricular walls, ventricular septal defect, and mid- gestational ...
Sirt1 Regulates Glial Progenitor Proliferation And Regeneration In White Matter After Neonatal Brain Injury., 2016 George Washington University
Sirt1 Regulates Glial Progenitor Proliferation And Regeneration In White Matter After Neonatal Brain Injury., Beata Jablonska, Marcin Gierdalski, Li-Jin Chew, Teresa Hawley, Mackenzie Catron, Arturo Lichauco, Juan Cabrera-Luque, Tracy Yuen, David Rowitch, Vittorio Gallo
Pediatrics Faculty Publications
Regenerative processes in brain pathologies require the production of distinct neural cell populations from endogenous progenitor cells. We have previously demonstrated that oligodendrocyte progenitor cell (OPC) proliferation is crucial for oligodendrocyte (OL) regeneration in a mouse model of neonatal hypoxia (HX) that reproduces diffuse white matter injury (DWMI) of premature infants. Here we identify the histone deacetylase Sirt1 as a Cdk2 regulator in OPC proliferation and response to HX. HX enhances Sirt1 and Sirt1/Cdk2 complex formation through HIF1α activation. Sirt1 deacetylates retinoblastoma (Rb) in the Rb/E2F1 complex, leading to dissociation of E2F1 and enhanced OPC proliferation. Sirt1 knockdown ...
Peptidylarginine Deiminase 1-Catalyzed Histone Citrullination Is Essential For Early Embryo Development, 2016 Nanjing Medical University
Peptidylarginine Deiminase 1-Catalyzed Histone Citrullination Is Essential For Early Embryo Development, Xiaoqian Zhang, Xiaoqiu Liu, Mei Zhang, Tingting Li, Aaron Muth, Paul R. Thompson, Scott A. Coonrod, Xuesen Zhang
Thompson Lab Publications
Peptidylarginine deiminase (PADI) enzymes are increasingly being associated with the regulation of chromatin structure and gene activity via histone citrullination. As one of the PADI family members, PADI1 has been mainly reported to be expressed in the epidermis and uterus, where the protein in keratinocytes is thought to promote differentiation by citrullinating filament proteins. However, the roles of PADI1 in preimplantation development have not been addressed. Using a PADI1-specific inhibitor and Padi1-morpholino knockdown, we found that citrullination of histone tails at H4R3 and H3R2/8/17 were markedly reduced in the 2- and 4-cell embryos. Consistent with this observation, early ...
Retinoic Acid Signaling Regulates Krt5 Independently Of Stem Cell Markers In Submandibular Salivary Gland Epithelium., 2016 University of Louisville
Retinoic Acid Signaling Regulates Krt5 Independently Of Stem Cell Markers In Submandibular Salivary Gland Epithelium., Timur Maratovich Abashev
Electronic Theses and Dissertations
Vitamin A metabolism, which produces the signaling molecule Retinoic Acid (RA), has been demonstrated to be important for growth and branching morphogenesis of mammalian embryonic salivary gland epithelium. However, it is not known whether RA functions directly within epithelial cells or in associated tissues that influence morphogenesis of salivary epithelium. Moreover, downstream targets of RA transcriptional regulation have not been identified. Here we show that canonical RA signaling occurs in multiple tissues of embryonic mouse salivary glands, including epithelium, associated parasympathetic ganglion neurons, and non‑neuronal mesenchyme. By culturing epithelium explants in isolation from other tissues we demonstrate that RA ...
Radial Glia Regulate Vascular Patterning Around The Developing Spinal Cord, 2016 Max Planck Institute for Heart and Lung Research
Radial Glia Regulate Vascular Patterning Around The Developing Spinal Cord, Ryota L. Matsuoka, Michele Marass, Avdesh Avdesh, Christian S.M. Helker, Hans-Martin Maischein, Ann S. Grosse, Harmandeep Kaur, Nathan D. Lawson, Wiebke Herzog, Didier Y.R. Stainier
Open Access Articles
Vascular networks surrounding individual organs are important for their development, maintenance, and function; however, how these networks are assembled remains poorly understood. Here we show that CNS progenitors, referred to as radial glia, modulate vascular patterning around the spinal cord by acting as negative regulators. We found that radial glia ablation in zebrafish embryos leads to excessive sprouting of the trunk vessels around the spinal cord, and exclusively those of venous identity. Mechanistically, we determined that radial glia control this process via the Vegf decoy receptor sFlt1: sflt1 mutants exhibit the venous over-sprouting observed in radial glia-ablated larvae, and sFlt1 ...
Dna Methylation Directs Genomic Localization Of Mbd2 And Mbd3 In Embryonic Stem Cells, 2016 University of Massachusetts Medical School
Dna Methylation Directs Genomic Localization Of Mbd2 And Mbd3 In Embryonic Stem Cells, Sarah J. Hainer, Kurtis N. Mccannell, Jun Yu, Ly-Sha Ee, Lihua (Julie) Zhu, Oliver J. Rando, Thomas G. Fazzio
Open Access Articles
Cytosine methylation is an epigenetic and regulatory mark that functions in part through recruitment of chromatin remodeling complexes containing methyl-CpG binding domain (MBD) proteins. Two MBD proteins, Mbd2 and Mbd3, were previously shown to bind methylated or hydroxymethylated DNA, respectively; however, both of these findings have been disputed. Here, we investigated this controversy using experimental approaches and re-analysis of published data and find no evidence for methylation-independent functions of Mbd2 or Mbd3. We show that chromatin localization of Mbd2 and Mbd3 is highly overlapping and, unexpectedly, we find Mbd2 and Mbd3 are interdependent for chromatin association. Further investigation reveals that ...
Transient Runx1 Expression During Early Mesendodermal Differentiation Of Hescs Promotes Epithelial To Mesenchymal Transition Through Tgfb2 Signaling, 2016 University of Massachusetts Medical School
Transient Runx1 Expression During Early Mesendodermal Differentiation Of Hescs Promotes Epithelial To Mesenchymal Transition Through Tgfb2 Signaling, Jennifer J. Vanoudenhove, Ricardo F. Medina, Prachi N. Ghule University Of Vermont College Of Medicine, Jane B. Lian, Janet L. Stein, Sayyed K. Zaidi, Gary S. Stein
Open Access Articles
The transition of human embryonic stem cells (hESCs) from pluripotency to lineage commitment is not fully understood, and a role for phenotypic transcription factors in the initial stages of hESC differentiation remains to be explored. From a screen of candidate factors, we found that RUNX1 is selectively and transiently upregulated early in hESC differentiation to mesendodermal lineages. Transcriptome profiling and functional analyses upon RUNX1 depletion established a role for RUNX1 in promoting cell motility. In parallel, we discovered a loss of repression for several epithelial genes, indicating that loss of RUNX1 impaired an epithelial to mesenchymal transition during differentiation. Cell ...
Evolutionary Genomics And Adaptive Evolution Of The Hedgehog Gene Family (Shh, Ihh And Dhh) In Vertebrates, 2016 Universidade do Porto - Portugal
Evolutionary Genomics And Adaptive Evolution Of The Hedgehog Gene Family (Shh, Ihh And Dhh) In Vertebrates, Joana Pereira, Warren E. Johnson, Stephen J. O'Brien, Erich D. Jarvis, Guojie Zhang, M. Thomas P. Gilbert, Vitor Vasconcelos, Agostinho Antunes
The Hedgehog (Hh) gene family codes for a class of secreted proteins composed of two active domains that act as signalling molecules during embryo development, namely for the development of the nervous and skeletal systems and the formation of the testis cord. While only one Hh gene is found typically in invertebrate genomes, most vertebrates species have three (Sonic hedgehog – Shh; Indian hedgehog – Ihh; and Desert hedgehog – Dhh), each with different expression patterns and functions, which likely helped promote the increasing complexity of vertebrates and their successful diversification. In this study, we used comparative genomic and adaptive evolutionary analyses to ...
Associations Of Peripubertal Serum Dioxin And Polychlorinated Biphenyl Concentrations With Pubertal Timing Among Russian Boys, 2016 Harvard School of Public Health
Associations Of Peripubertal Serum Dioxin And Polychlorinated Biphenyl Concentrations With Pubertal Timing Among Russian Boys, Jane S. Burns, Mary M. Lee, Paige L. Williams, Susan A. Korrick, Oleg Sergeyev, Thuy Lam, Boris Revich, Russ Hauser
Mary M. Lee
BACKGROUND: Dioxins, furans, and polychlorinated biphenyls (PCBs), dioxin-like and nondioxin-like, have been linked to alterations in puberty. OBJECTIVES: We examined the association of peripubertal serum levels of these compounds (and their toxic equivalents (TEQs)) with pubertal onset and maturity among Russian boys enrolled at ages 8-9 years and followed prospectively through ages 17-18 years. METHODS: At enrollment, 473 boys had serum dioxin-like compounds and PCBs measured. At the baseline visit and annually until age 17-18 years, a physician performed pubertal staging [Genitalia (G), Pubarche (P), and testicular volume (TV)]. 315 subjects completed the follow-up visit at 17-18 years of age ...
A Widely Employed Germ Cell Marker Is An Ancient Disordered Protein With Reproductive Functions In Diverse Eukaryotes, Michelle A. Carmell, Gregoriy A. Dokshin, Helen Skaletsky, Yueh-Chiang Hu, Josien C. Van Wolfswinkel, Kyomi J. Igarashi, Daniel W. Bellott, Michael Nefedov, Peter W. Reddien, George C. Enders, Vladimir N. Uversky, Craig C. Mello, David C. Page
Open Access Articles
The advent of sexual reproduction and the evolution of a dedicated germline in multicellular organisms are critical landmarks in eukaryotic evolution. We report an ancient family of GCNA (germ cell nuclear antigen) proteins that arose in the earliest eukaryotes, and feature a rapidly evolving intrinsically disordered region (IDR). Phylogenetic analysis reveals that GCNA proteins emerged before the major eukaryotic lineages diverged; GCNA predates the origin of a dedicated germline by a billion years. Gcna gene expression is enriched in reproductive cells across eukarya - either just prior to or during meiosis in single-celled eukaryotes, and in stem cells and germ cells ...
Regulation Of X-Linked Gene Expression During Early Mouse Development By Rlim, 2016 University of Massachusetts Medical School
Regulation Of X-Linked Gene Expression During Early Mouse Development By Rlim, Feng Wang, Jongdae Shin, Jeremy Shea, Jun Yu, Ana Boskovic, Meg Byron, Xiaochun Zhu, Alex K. Shalek, Aviv Regev, Jeanne B. Lawrence, Eduardo M. Torres, Lihua J. Zhu, Oliver J. Rando, Ingolf Bach
Open Access Articles
Mammalian X-linked gene expression is highly regulated as female cells contain two and male one X chromosome (X). To adjust the X gene dosage between genders, female mouse preimplantation embryos undergo an imprinted form of X chromosome inactivation (iXCI) that requires both Rlim (also known as Rnf12) and the long non-coding RNA Xist. Moreover, it is thought that gene expression from the single active X is upregulated to correct for bi-allelic autosomal (A) gene expression. We have combined mouse genetics with RNA-seq on single mouse embryos to investigate functions of Rlim on the temporal regulation of iXCI and Xist. Our ...
Smarca4 Regulates Gene Expression And Higher-Order Chromatin Structure In Proliferating Mammary Epithelial Cells, 2016 University of Massachusetts Medical School
Smarca4 Regulates Gene Expression And Higher-Order Chromatin Structure In Proliferating Mammary Epithelial Cells, A. Rasim Barutcu, Bryan R. Lajoie, Andrew J. Fritz, Rachel P. Mccord, Jeffrey A. Nickerson, Andre J. Van Wijnen, Jane B. Lian, Janet L. Stein, Job Dekker, Gary S. Stein, Anthony N. Imbalzano
Cell and Developmental Biology Publications and Presentations
The packaging of DNA into chromatin plays an important role in transcriptional regulation and nuclear processes. Brahma-related gene-1 SMARCA4 (also known as BRG1), the essential ATPase subunit of the mammalian SWI/SNF chromatin remodeling complex, uses the energy from ATP hydrolysis to disrupt nucleosomes at target regions. Although the transcriptional role of SMARCA4 at gene promoters is well-studied, less is known about its role in higher-order genome organization. SMARCA4 knockdown in human mammary epithelial MCF-10A cells resulted in 176 up-regulated genes, including many related to lipid and calcium metabolism, and 1292 down-regulated genes, some of which encode extracellular matrix (ECM ...
Autophagy-Independent Function Of Atg1 For Apoptosis-Induced Compensatory Proliferation, 2016 University of Birmingham
Autophagy-Independent Function Of Atg1 For Apoptosis-Induced Compensatory Proliferation, Mingli Li, Jillian L. Lindblad, Ernesto Perez, Andreas Bergmann, Yun Fan
Molecular, Cell and Cancer Biology Publications
BACKGROUND: ATG1 belongs to the Uncoordinated-51-like kinase protein family. Members of this family are best characterized for roles in macroautophagy and neuronal development. Apoptosis-induced proliferation (AiP) is a caspase-directed and JNK-dependent process which is involved in tissue repair and regeneration after massive stress-induced apoptotic cell loss. Under certain conditions, AiP can cause tissue overgrowth with implications for cancer.
RESULTS: Here, we show that Atg1 in Drosophila (dAtg1) has a previously unrecognized function for both regenerative and overgrowth-promoting AiP in eye and wing imaginal discs. dAtg1 acts genetically downstream of and is transcriptionally induced by JNK activity, and it is required ...