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Article: Reining in cytokinesis with a septin corral.

Finger, Fern P

BioEssays : news and reviews in molecular, cellular and developmental biology

2005 Volume 27, Issue 1, Page(s) 5–8

Abstract: Septins are a family of conserved GTP-binding proteins that function in cytokinesis in fungi and animals. In budding yeast, septins form scaffolds for assembly of the actomyosin contractile ring at the cleavage plane, a role that does not appear to be ... ...

Abstract	Septins are a family of conserved GTP-binding proteins that function in cytokinesis in fungi and animals. In budding yeast, septins form scaffolds for assembly of the actomyosin contractile ring at the cleavage plane, a role that does not appear to be conserved in other organisms. The septins form an hourglass-shaped collar at the mother-bud neck, which splits into two rings flanking the division plane at cytokinesis. A recent study(1) demonstrates that these two septin rings constitute diffusion barriers that create a cytokinetic compartment to retain cortical cytokinetic factors in proximity to the cleavage plane.
MeSH term(s)	Animals ; Cell Cycle Proteins/chemistry ; Cytokinesis ; Cytoskeletal Proteins/chemistry ; Cytoskeletal Proteins/physiology ; Diffusion ; Fungal Proteins/chemistry ; GTP Phosphohydrolases/chemistry ; GTP-Binding Proteins/chemistry ; Humans ; Macromolecular Substances/chemistry ; Models, Biological ; Saccharomycetales
Chemical Substances	Cell Cycle Proteins ; Cytoskeletal Proteins ; Fungal Proteins ; Macromolecular Substances ; GTP Phosphohydrolases (EC 3.6.1.-) ; GTP-Binding Proteins (EC 3.6.1.-)
Language	English
Publishing date	2005-01
Publishing country	United States
Document type	Journal Article ; Review
ZDB-ID	50140-2
ISSN	1521-1878 ; 0265-9247
ISSN (online)	1521-1878
ISSN	0265-9247
DOI	10.1002/bies.20167
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Article: Interdependence of the contractile ring and spindle midzone in cleavage plane maintenance.

Finger, Fern P

Cell cycle (Georgetown, Tex.)

2003 Volume 2, Issue 6, Page(s) 553–554

Abstract: How segregation of the chromosomes is coordinated with the ensuing cell cleavage to complete the cell cycle is not well understood. A recent study of cytokinesis in fission yeast by Pardo and Nurse suggests that the contractile ring is required for ... ...

Abstract	How segregation of the chromosomes is coordinated with the ensuing cell cleavage to complete the cell cycle is not well understood. A recent study of cytokinesis in fission yeast by Pardo and Nurse suggests that the contractile ring is required for assembly of the post-mitotic microtubule array (PAA). In turn, the PAA is required to maintain the contractile ring at the cleavage plane, as well as to keep the nuclei separated at the poles of the cleaving cell. These functions may be particularly important for a cell cycle checkpoint ensuring that if cytokinesis is delayed, septation will occur between the two daughter nuclei.
MeSH term(s)	Actins/metabolism ; Animals ; Cell Division/physiology ; Chromosomes/metabolism ; Microtubules/metabolism ; Schizosaccharomyces/cytology ; Schizosaccharomyces/metabolism ; Spindle Apparatus/metabolism
Chemical Substances	Actins
Language	English
Publishing date	2003-09-22
Publishing country	United States
Document type	Journal Article ; Review
ZDB-ID	2146183-1
ISSN	1551-4005 ; 1538-4101 ; 1554-8627
ISSN (online)	1551-4005
ISSN	1538-4101 ; 1554-8627
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Article: One ring to bind them. Septins and actin assembly.

Finger, Fern P

Developmental cell

2002 Volume 3, Issue 6, Page(s) 761–763

Abstract: Septins are GTPases required for cytokinesis and other processes requiring spatial organization of the cell cortex, but their molecular functions in these processes are unknown. In this issue of Developmental Cell, Kinoshita et al. take an important step ...

Abstract	Septins are GTPases required for cytokinesis and other processes requiring spatial organization of the cell cortex, but their molecular functions in these processes are unknown. In this issue of Developmental Cell, Kinoshita et al. take an important step in elucidating the molecular functions of septins by developing an in vitro assay for septin assembly and exploring the relationship between mammalian septins and actin.
MeSH term(s)	Actin Cytoskeleton/metabolism ; Animals ; Binding Sites/physiology ; Contractile Proteins/metabolism ; Cytoskeletal Proteins ; Eukaryotic Cells/metabolism ; GTP-Binding Proteins/metabolism ; Humans ; Septins ; Yeasts/metabolism ; Yeasts/ultrastructure
Chemical Substances	Contractile Proteins ; Cytoskeletal Proteins ; anillin ; GTP-Binding Proteins (EC 3.6.1.-) ; SEPTIN6 protein, human (EC 3.6.1.-) ; Septins (EC 3.6.1.-)
Language	English
Publishing date	2002-12-12
Publishing country	United States
Document type	Journal Article ; Review ; Comment
ZDB-ID	2054967-2
ISSN	1878-1551 ; 1534-5807
ISSN (online)	1878-1551
ISSN	1534-5807
DOI	10.1016/s1534-5807(02)00371-4
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Article ; Online: UNC-85, a C. elegans homolog of the histone chaperone Asf1, functions in post-embryonic neuroblast replication.

Grigsby, Iwen F / Finger, Fern P

Developmental biology

2008 Volume 319, Issue 1, Page(s) 100–109

Abstract: Normal animal development requires accurate cell divisions, not only in the early stages of rapid embryonic cleavages, but also in later developmental stages. The Caenorhabditis elegans unc-85 gene is implicated only in cell divisions that occur post- ... ...

Abstract	Normal animal development requires accurate cell divisions, not only in the early stages of rapid embryonic cleavages, but also in later developmental stages. The Caenorhabditis elegans unc-85 gene is implicated only in cell divisions that occur post-embryonically, primarily in terminal neuronal lineages. Variable post-embryonic cell division failures in ventral cord motoneuron precursors result in uncoordinated locomotion of unc-85 mutant larvae by the second larval stage. These neuroblast cell division failures often result in unequally sized daughter nuclei, and sometimes in nuclear fusions. Using a combination of conventional mapping techniques and microarray analysis, we cloned the unc-85 gene, and find that it encodes one of two C. elegans homologs of the yeast Anti-silencing function 1 (Asf1) histone chaperone. The unc-85 gene is expressed in replicating cells throughout development, and the protein is localized in nuclei. Examination of null mutants confirms that embryonic neuroblast cell divisions occur normally, but post-embryonic neuroblast cell divisions fail. Analysis of the DNA content of the mutant neurons indicates that defective replication in post-embryonic neuroblasts gives rise to ventral cord neurons with an average DNA content of approximately 2.5 n. We conclude that UNC-85 functions in post-embryonic DNA replication in ventral cord motor neuron precursors.
MeSH term(s)	Amino Acid Sequence ; Animals ; Caenorhabditis elegans/embryology ; Caenorhabditis elegans/growth & development ; Caenorhabditis elegans Proteins/genetics ; Caenorhabditis elegans Proteins/metabolism ; Cell Nucleus/metabolism ; Cloning, Molecular ; DNA Replication ; Embryo, Nonmammalian/metabolism ; Gene Expression Regulation, Developmental ; Molecular Chaperones/genetics ; Molecular Chaperones/metabolism ; Molecular Sequence Data ; Motor Neurons/metabolism ; Neuroepithelial Cells ; Sequence Alignment
Chemical Substances	Caenorhabditis elegans Proteins ; Molecular Chaperones ; unc-85 protein, C elegans
Language	English
Publishing date	2008-04-22
Publishing country	United States
Document type	Journal Article
ZDB-ID	1114-9
ISSN	1095-564X ; 0012-1606
ISSN (online)	1095-564X
ISSN	0012-1606
DOI	10.1016/j.ydbio.2008.04.013
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Article: Fusion and fission: membrane trafficking in animal cytokinesis.

Finger, Fern P / White, John G

Cell

2002 Volume 108, Issue 6, Page(s) 727–730

Abstract: Cytokinesis is the physical act of separating daughter cells, allowing them to become separate entities. Recent studies have revealed that membrane insertion for furrowing and scission of the residual bridge is a key aspect of animal cytokinesis. ...

Abstract	Cytokinesis is the physical act of separating daughter cells, allowing them to become separate entities. Recent studies have revealed that membrane insertion for furrowing and scission of the residual bridge is a key aspect of animal cytokinesis.
MeSH term(s)	Animals ; Cell Division/physiology ; Cell Membrane/physiology ; Membrane Fusion/physiology
Language	English
Publishing date	2002-03-22
Publishing country	United States
Document type	Journal Article ; Review
ZDB-ID	187009-9
ISSN	1097-4172 ; 0092-8674
ISSN (online)	1097-4172
ISSN	0092-8674
DOI	10.1016/s0092-8674(02)00668-2
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Article ; Online: Functional redundancy of two C. elegans homologs of the histone chaperone Asf1 in germline DNA replication.

Grigsby, Iwen F / Rutledge, Eric M / Morton, Christine A / Finger, Fern P

Developmental biology

2009 Volume 329, Issue 1, Page(s) 64–79

Abstract: Eukaryotic genomes contain either one or two genes encoding homologs of the highly conserved histone chaperone Asf1, however, little is known of their in vivo roles in animal development. UNC-85 is one of the two Caenorhabditis elegans Asf1 homologs and ... ...

Abstract	Eukaryotic genomes contain either one or two genes encoding homologs of the highly conserved histone chaperone Asf1, however, little is known of their in vivo roles in animal development. UNC-85 is one of the two Caenorhabditis elegans Asf1 homologs and functions in post-embryonic replication in neuroblasts. Although UNC-85 is broadly expressed in replicating cells, the specificity of the mutant phenotype suggested possible redundancy with the second C. elegans Asf1 homolog, ASFL-1. The asfl-1 mRNA is expressed in the meiotic region of the germline, and mutants in either Asf1 genes have reduced brood sizes and low penetrance defects in gametogenesis. The asfl-1, unc-85 double mutants are sterile, displaying defects in oogenesis and spermatogenesis, and analysis of DNA synthesis revealed that DNA replication in the germline is blocked. Analysis of somatic phenotypes previously observed in unc-85 mutants revealed that they are neither observed in asfl-1 mutants, nor enhanced in the double mutants, with the exception of enhanced male tail abnormalities in the double mutants. These results suggest that the two Asf1 homologs have partially overlapping functions in the germline, while UNC-85 is primarily responsible for several Asf1 functions in somatic cells, and is more generally involved in replication throughout development.
MeSH term(s)	Animals ; Caenorhabditis elegans/embryology ; Caenorhabditis elegans/genetics ; Caenorhabditis elegans/physiology ; Caenorhabditis elegans Proteins/genetics ; Caenorhabditis elegans Proteins/metabolism ; DNA Replication ; Disorders of Sex Development/genetics ; Embryo, Nonmammalian ; Female ; Genes, Helminth ; Helminth Proteins/genetics ; Helminth Proteins/metabolism ; Histones/genetics ; Histones/metabolism ; In Situ Hybridization ; Male ; Meiosis ; Models, Biological ; Molecular Chaperones/genetics ; Molecular Chaperones/metabolism ; Oogenesis/genetics ; RNA, Messenger/metabolism ; Spermatogenesis/genetics
Chemical Substances	Caenorhabditis elegans Proteins ; Helminth Proteins ; Histones ; Molecular Chaperones ; RNA, Messenger ; unc-85 protein, C elegans
Language	English
Publishing date	2009-02-20
Publishing country	United States
Document type	Journal Article ; Research Support, U.S. Gov't, Non-P.H.S.
ZDB-ID	1114-9
ISSN	1095-564X ; 0012-1606
ISSN (online)	1095-564X
ISSN	0012-1606
DOI	10.1016/j.ydbio.2009.02.015
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Article: A computational model for C. elegans locomotory behavior: application to multiworm tracking.

Roussel, Nicolas / Morton, Christine A / Finger, Fern P / Roysam, Badrinath

IEEE transactions on bio-medical engineering

2007 Volume 54, Issue 10, Page(s) 1786–1797

Abstract: A computational approach is presented for modeling and quantifying the structure and dynamics of the nematode C. elegans observed by time-lapse microscopy. Worm shape and conformations are expressed in a decoupled manner. Complex worm movements are ... ...

Abstract	A computational approach is presented for modeling and quantifying the structure and dynamics of the nematode C. elegans observed by time-lapse microscopy. Worm shape and conformations are expressed in a decoupled manner. Complex worm movements are expressed in terms of three primitive patterns--peristaltic progression, deformation, and translation. The model has been incorporated into algorithms for segmentation and simultaneous tracking of multiple worms in a field, some of which may be interacting in complex ways. A recursive Bayesian filter is used for tracking. Unpredictable behaviors associated with interactions are resolved by multiple-hypothesis tracking. Our algorithm can track worms of diverse sizes and conformations (coiled/uncoiled) in the presence of imaging artifacts and clutter, even when worms are overlapping with others. A two-observer performance assessment was conducted over 16 image sequences representing wild-type and uncoordinated mutants as a function of worm size, conformation, presence of clutter, and worm entanglement. Overall detected tracking failures were 1.41%, undetected tracking failures were 0.41%, and segmentation errors were 1.11% of worm length. When worms overlap, our method reduced undetected failures from 12% to 1.75%, and segmentation error from 11% to 5%. Our method provides the basis for reliable morphometric and locomotory analysis of freely behaving worm populations.
MeSH term(s)	Animals ; Caenorhabditis elegans/physiology ; Computer Simulation ; Gait/physiology ; Locomotion/physiology ; Models, Biological ; Population Dynamics
Language	English
Publishing date	2007-10
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
ZDB-ID	160429-6
ISSN	1558-2531 ; 0018-9294
ISSN (online)	1558-2531
ISSN	0018-9294
DOI	10.1109/TBME.2007.894981
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Article: A role for septins in cellular and axonal migration in C. elegans.

Finger, Fern P / Kopish, Kevin R / White, John G

Developmental biology

2003 Volume 261, Issue 1, Page(s) 220–234

Abstract: Caenorhabditis elegans has two genes, unc-59 and unc-61, encoding septin-family GTPases. Mutations in the septin genes cause defects in locomotory behavior that have been previously attributed to cytokinesis failures in postembryonic neuroblasts. We find ...

Abstract	Caenorhabditis elegans has two genes, unc-59 and unc-61, encoding septin-family GTPases. Mutations in the septin genes cause defects in locomotory behavior that have been previously attributed to cytokinesis failures in postembryonic neuroblasts. We find that mutations in either septin gene frequently cause uncoordination in newly hatched larvae in the absence of cytokinesis failures. The septins exhibit developmentally regulated expression, including expression in various neurons at times when processes are extending and synapses are forming. Motor neurons in the mutant larvae display defects in multiple aspects of axonal migration and guidance that are likely to be responsible for the locomotory behavior defects. The septins are also expressed in migrating distal tip cells, which are leaders for gonad arm extension. Septin mutants affect morphology of the distal tip cells, as well as their migration and guidance during gonadogenesis. These results suggest that septins may be generally required for developmental migrations and pathfinding.
MeSH term(s)	Animals ; Axons/physiology ; Caenorhabditis elegans/cytology ; Caenorhabditis elegans/genetics ; Caenorhabditis elegans/growth & development ; Caenorhabditis elegans/physiology ; Caenorhabditis elegans Proteins/genetics ; Caenorhabditis elegans Proteins/physiology ; Cell Cycle Proteins/genetics ; Cell Cycle Proteins/physiology ; Cell Movement ; GTP-Binding Proteins ; Gene Expression Regulation, Developmental ; Genes, Helminth ; Green Fluorescent Proteins ; Luminescent Proteins/genetics ; Luminescent Proteins/metabolism ; Mutation ; Nervous System/growth & development ; Phenotype ; Recombinant Fusion Proteins/genetics ; Recombinant Fusion Proteins/metabolism
Chemical Substances	Caenorhabditis elegans Proteins ; Cell Cycle Proteins ; Luminescent Proteins ; Recombinant Fusion Proteins ; UNC-59 protein, C elegans ; unc-61 protein, C elegans ; Green Fluorescent Proteins (147336-22-9) ; GTP-Binding Proteins (EC 3.6.1.-)
Language	English
Publishing date	2003-09-01
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, P.H.S.
ZDB-ID	1114-9
ISSN	1095-564X ; 0012-1606
ISSN (online)	1095-564X
ISSN	0012-1606
DOI	10.1016/s0012-1606(03)00296-3
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Article ; Online: Machine Learning

Gabriel Fernandes Bueno / Emanuel Arnoni Costa / César Augusto Guimarães Finger / Veraldo Liesenberg / Polyanna da Conceição Bispo

Forests, Vol 13, Iss 8, p

Crown Diameter Predictive Modeling for Open-Grown Trees in the Cerrado Biome, Brazil

2022 Volume 1295

Abstract: The Brazilian Cerrado biome is a hotspot due to its ecological importance and high diversity of fauna and flora. We aimed to develop statistical models to predict the crown diameter of open-growing trees using several forest attributes. Potential crown ... ...

Abstract	The Brazilian Cerrado biome is a hotspot due to its ecological importance and high diversity of fauna and flora. We aimed to develop statistical models to predict the crown diameter of open-growing trees using several forest attributes. Potential crown diameter trends in the measured trees were determined by quantile regression. Crown diameter models were developed by regression analyses, artificial neural networks, support vector machine, and random forest techniques. We evaluated 200 trees characterized into 60 species belonging to 30 botanical families. Our equation for potential crown diameter predicts the derived basal area, number of trees, and the necessary growth space of crown diameter at breast height. Artificial neural networks (with the following validation statistics: R 2 = 0.90, RMSE = 1.21, MAE = 0.93, and MAPE = 16.25) predicted crown diameter more accurately than the other evaluated techniques. Modeling crown diameter via machine learning represents an important step toward the assessment of crown dynamics by species and can support the decision making of silvicultural practices and other related activities in several rural properties within the Cerrado biome.
Keywords	computational intelligence ; crown radius ; biometrics attributes ; prediction models ; Plant ecology ; QK900-989
Subject code	006
Language	English
Publishing date	2022-08-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
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Article ; Online: HLA-G alleles and their impacts on placental HSV-1 infection in women from southern Brazil.

Tornatore, Michele / Amaral, Suélen Cavalheiro / Alves, Brunna M / de Oliveira, Gisele Rodrigues / Finger-Jardim, Fabiana / Avila, Emiliana Claro / Pivato, Andressa Fernandes / Lobato, Rubens Caurio / Chies, José Artur Bogo / Ellwanger, Joel Henrique / Soares, Esmeralda A / Sánchez-Luquez, Karen / Gonçalves, Carla Vitola / Martínez, Ana Maria Barral de / Soares, Marcelo A / da Hora, Vanusa Pousada

Journal of reproductive immunology

2023 Volume 159, Page(s) 104134

Abstract: ... 01:01 allele was significantly associated with an increased risk of placental HSV-1 infection (p = 0 ...

Abstract	The Human Leukocyte Antigen G (HLA-G) is an immunoregulatory molecule with a critical role in pregnancy success. HLA-G alleles are associated with differential susceptibility to multiple conditions, including gestational problems, infectious diseases, and viral persistence. Of note, both herpes simplex virus type 1 (HSV-1) and type 2 (HSV-2) can impair HLA-G expression, interfering with HLA-G-associated immunoregulation. On the other hand, the impacts of HLA-G alleles on susceptibility to Herpesviridae infection is a neglected issue. Therefore, this study evaluated HLA-G allele frequencies and their associations with placental Herpesviridae infection in women from southern Brazil. Placenta samples were collected soon after delivery, and detection of viral DNA of HSV-1, HSV-2 and human cytomegalovirus (HCMV) was performed by polymerase chain reaction (PCR). A fragment of HLA-G (exons 2-4) was amplified by PCR, sequenced, and analyzed to allele determination. One hundred and seventy women had their alleles determined. Overall, 25 HLA-G alleles were found, distributed into 56 different genotypes. The most frequent alleles were G* 01:01:01 and G* 01:01:02, found in 37.9 % and 16.5 % of samples, respectively. Among the 170 women, 89 (52.4 %) tested positive for Herpesviridae DNA in the placenta, 55 (32.3 %) tested negative, 3 (1.8 %) were negative for HSV-1 and HSV-2 (with absent HCMV data), and 23 (13.5 %) were undetermined. The G* 01:01:01 allele was significantly associated with an increased risk of placental HSV-1 infection (p = 0.0151; OR=1.837; IC=1.108-3.045). This study describes new information concerning placental HLA-G alleles in women from southern Brazil and helps explain how genetic background can modify susceptibility to placental infections.
MeSH term(s)	Pregnancy ; Female ; Humans ; Herpesvirus 1, Human/genetics ; Alleles ; HLA-G Antigens/genetics ; Brazil/epidemiology ; Placenta ; Herpes Simplex ; Herpesvirus 2, Human/genetics ; Cytomegalovirus
Chemical Substances	HLA-G Antigens
Language	English
Publishing date	2023-08-15
Publishing country	Ireland
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	424421-7
ISSN	1872-7603 ; 0165-0378
ISSN (online)	1872-7603
ISSN	0165-0378
DOI	10.1016/j.jri.2023.104134
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