Bioarchitecture最新文献

筛选
英文 中文
Gradual recruitment and selective clearing generate germ plasm aggregates in the zebrafish embryo. 在斑马鱼胚胎中,逐渐的招募和选择性的清除产生了种质聚集体。
Bioarchitecture Pub Date : 2013-07-01 DOI: 10.4161/bioa.26538
Celeste Eno, Francisco Pelegri
{"title":"Gradual recruitment and selective clearing generate germ plasm aggregates in the zebrafish embryo.","authors":"Celeste Eno,&nbsp;Francisco Pelegri","doi":"10.4161/bioa.26538","DOIUrl":"https://doi.org/10.4161/bioa.26538","url":null,"abstract":"<p><p>Determination of primordial germ cells (PGCs) is one of the earliest decisions in animal embryogenesis. In many species, PGCs are determined through maternally-inherited germ plasm ribonucleoparticles (RNPs). In zebrafish, these are transmitted during oogenesis as dispersed RNPs, which after fertilization multimerize and become recruited as large aggregates at furrows for the first and second cell cycles. Here, we show that the number of recruited germ plasm RNPs is halved every cell cycle. We also show that germ plasm RNPs are recruited during the third cell cycle, but only transiently. Our data support a mechanism in which systematic local gathering of germ plasm RNPs during cytokinesis and threshold-dependent clearing contribute to forming germ plasm aggregates with the highest RNP number and germ cell-inducing potential. </p>","PeriodicalId":89329,"journal":{"name":"Bioarchitecture","volume":"3 4","pages":"125-32"},"PeriodicalIF":0.0,"publicationDate":"2013-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4161/bioa.26538","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"32252272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 21
Integration of signaling and cytoskeletal remodeling by Nck in directional cell migration. 定向细胞迁移中Nck信号传导和细胞骨架重塑的整合。
Bioarchitecture Pub Date : 2013-05-01 Epub Date: 2013-07-17 DOI: 10.4161/bioa.25744
Sankar P Chaki, Gonzalo M Rivera
{"title":"Integration of signaling and cytoskeletal remodeling by Nck in directional cell migration.","authors":"Sankar P Chaki,&nbsp;Gonzalo M Rivera","doi":"10.4161/bioa.25744","DOIUrl":"https://doi.org/10.4161/bioa.25744","url":null,"abstract":"<p><p>Planar and apical-basal cellular polarization of epithelia and endothelia are crucial during morphogenesis. The establishment of these distinct polarity states and their transitions are regulated by signaling networks that include polarity complexes, Rho GTPases, and phosphoinositides. The spatiotemporal coordination of signaling by these molecules modulates cytoskeletal remodeling and vesicle trafficking to specify membrane domains, a prerequisite for the organization of tissues and organs. Here we present an overview of how activation of the WASp/Arp2/3 pathway of actin remodeling by Nck coordinates directional cell migration and speculate on its role as a signaling integrator in the coordination of cellular processes involved in endothelial cell polarity and vascular lumen formation. </p>","PeriodicalId":89329,"journal":{"name":"Bioarchitecture","volume":"3 3","pages":"57-63"},"PeriodicalIF":0.0,"publicationDate":"2013-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4161/bioa.25744","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31607590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 30
The vacuole within: how cellular organization dictates notochord function. 内部液泡:细胞组织如何支配脊索功能。
Bioarchitecture Pub Date : 2013-05-01 Epub Date: 2013-06-26 DOI: 10.4161/bioa.25503
Kathryn Ellis, Brenton D Hoffman, Michel Bagnat
{"title":"The vacuole within: how cellular organization dictates notochord function.","authors":"Kathryn Ellis,&nbsp;Brenton D Hoffman,&nbsp;Michel Bagnat","doi":"10.4161/bioa.25503","DOIUrl":"https://doi.org/10.4161/bioa.25503","url":null,"abstract":"The notochord is an evolutionarily conserved structure that has long been known to play an important role in patterning during embryogenesis. Structurally, the notochord is composed of two cell layers: an outer epithelial-like sheath, and an inner core of cells that contain large fluid-filled vacuoles. We have recently shown these notochord vacuoles are lysosome-related organelles that form through Rab32a and vacuolar-type proton-ATPase-dependent acidification. Disruption of notochord vacuoles results in a shortened embryo along the anterior-posterior axis. Interestingly, we discovered that notochord vacuoles are also essential for proper spine morphogenesis and that vacuole defects lead to scoliosis of the spine. Here we discuss the cellular organization of the notochord and how key features of its architecture allow the notochord to function in embryonic axis elongation and spine formation.","PeriodicalId":89329,"journal":{"name":"Bioarchitecture","volume":"3 3","pages":"64-8"},"PeriodicalIF":0.0,"publicationDate":"2013-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4161/bioa.25503","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31608094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 29
Periodicities designed in the tropomyosin sequence and structure define its functions. 原肌球蛋白序列和结构的周期性定义了它的功能。
Bioarchitecture Pub Date : 2013-05-01 Epub Date: 2013-07-08 DOI: 10.4161/bioa.25616
Bipasha Barua
{"title":"Periodicities designed in the tropomyosin sequence and structure define its functions.","authors":"Bipasha Barua","doi":"10.4161/bioa.25616","DOIUrl":"https://doi.org/10.4161/bioa.25616","url":null,"abstract":"<p><p>Tropomyosin is an actin binding protein that regulates actin filament dynamics and its interactions with actin binding proteins such as myosin, tropomodulin, formin, Arp2/3 and ADF-cofilin in most eukaryotic cells. Tropomyosin is the prototypical two-chained, α-helical coiled coil protein that associates end-to-end and binds to both sides of the actin filament. Each tropomyosin molecule spans four to seven actin monomers in the filament, depending on the size of the tropomyosin. Tropomyosins have a periodic heptad repeat sequence that is characteristic of coiled coil proteins as well as additional periodicities required for its interaction with the actin filament, where each periodic repeat interacts with one actin molecule. This review addresses the role of periodic features of the Tm molecule in carrying out its universal functions of binding to the actin filament and its regulation and the specific features that may determine the isoform specificity of tropomyosins. </p>","PeriodicalId":89329,"journal":{"name":"Bioarchitecture","volume":"3 3","pages":"51-6"},"PeriodicalIF":0.0,"publicationDate":"2013-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4161/bioa.25616","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31607688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 22
Insights from an erroneous kinetochore-microtubule attachment state. 从一个错误的着丝细胞-微管附着状态的见解。
Bioarchitecture Pub Date : 2013-05-01 Epub Date: 2013-07-15 DOI: 10.4161/bioa.25734
Stuart Cane, Philip T McGilvray, Thomas J Maresca
{"title":"Insights from an erroneous kinetochore-microtubule attachment state.","authors":"Stuart Cane,&nbsp;Philip T McGilvray,&nbsp;Thomas J Maresca","doi":"10.4161/bioa.25734","DOIUrl":"https://doi.org/10.4161/bioa.25734","url":null,"abstract":"<p><p>Faithful distribution of the genome requires that sister kinetochores, which assemble on each chromatid during cell division, interact with dynamic microtubules from opposite spindle poles in a configuration called chromosome biorientation. Biorientation produces tension that increases the affinity of kinetochores for microtubules via ill-defined mechanisms. Non-bioriented kinetochore-microtubule (kt-MT) interactions are prevalent but short-lived due to an error correction pathway that reduces the affinity of kinetochores for microtubules. Interestingly, incorrect kt-MT interactions can be stabilized by experimentally applying force to misoriented chromosomes. Here, a live-cell force assay is utilized to characterize the molecular composition of a common type of improper kt-MT attachment. Our force-related studies are also discussed in the context of current models for tension-dependent stabilization of kt-MT interactions. </p>","PeriodicalId":89329,"journal":{"name":"Bioarchitecture","volume":"3 3","pages":"69-76"},"PeriodicalIF":0.0,"publicationDate":"2013-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4161/bioa.25734","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31608569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Supracellular actomyosin assemblies during development. 发育过程中的细胞上肌动球蛋白聚集。
Bioarchitecture Pub Date : 2013-03-01 DOI: 10.4161/bioa.25339
Katja Röper
{"title":"Supracellular actomyosin assemblies during development.","authors":"Katja Röper","doi":"10.4161/bioa.25339","DOIUrl":"https://doi.org/10.4161/bioa.25339","url":null,"abstract":"<p><p>Changes in cell shape are one of the driving forces of tissue morphogenesis. Contractile cytoskeletal assemblies based on actomyosin networks have emerged as a main player that can drive these changes. Different types of actomyosin networks have been identified, with distinct subcellular localizations, including apical junctional and apicomedial actomyosin. A further specialization of junctional actomyosin are so-called actomyosin 'cables', supracellular arrangements that appear to stretch over many cell diameters. Such actomyosin cables have been shown to serve several important functions, in processes such as wound healing, epithelial morphogenesis and maintenance of compartment identities during development. In the Drosophila embryo, we have recently identified a function for a circumferential actomyosin cable in assisting tube formation. Here, I will briefly summarize general principles that have emerged from the analysis of such cables. </p>","PeriodicalId":89329,"journal":{"name":"Bioarchitecture","volume":"3 2","pages":"45-9"},"PeriodicalIF":0.0,"publicationDate":"2013-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4161/bioa.25339","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31500062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 55
Dickkopf-3 function in the prostate: implications for epithelial homeostasis and tumor progression. 前列腺Dickkopf-3功能:对上皮稳态和肿瘤进展的影响
Bioarchitecture Pub Date : 2013-03-01 DOI: 10.4161/bioa.25243
Diana Romero, Robert Kypta
{"title":"Dickkopf-3 function in the prostate: implications for epithelial homeostasis and tumor progression.","authors":"Diana Romero,&nbsp;Robert Kypta","doi":"10.4161/bioa.25243","DOIUrl":"https://doi.org/10.4161/bioa.25243","url":null,"abstract":"<p><p>The tumor suppressor Dickkopf-3 (Dkk-3) is rather a unique molecule. Although it is related to the Dickkopf family of secreted Wnt antagonists, it does not directly inhibit Wnt signaling, and its function and mechanism of action are unknown. Endogenous Dkk-3 was recently found to be required to limit cell proliferation both in the developing mouse prostate and in 3D cultures of human prostate epithelial cells. Dkk-3 was further shown to modulate the response of normal prostate epithelial cells to transforming growth factor-β (TGF-β). These studies are consistent with a model in which Dkk-3 is required by normal cells to prevent the TGF-β switch from tumor suppressor to tumor promoter. Here, we discuss these findings and their potential impact on the development and progression of prostate cancer. </p>","PeriodicalId":89329,"journal":{"name":"Bioarchitecture","volume":"3 2","pages":"42-4"},"PeriodicalIF":0.0,"publicationDate":"2013-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4161/bioa.25243","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31505251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
Aged skeletal muscle retains the ability to fully regenerate functional architecture. 衰老的骨骼肌保留了完全再生功能结构的能力。
Bioarchitecture Pub Date : 2013-03-01 Epub Date: 2013-07-01 DOI: 10.4161/bioa.24966
Antonio S J Lee, Judy E Anderson, Josephine E Joya, Stewart I Head, Nalini Pather, Anthony J Kee, Peter W Gunning, Edna C Hardeman
{"title":"Aged skeletal muscle retains the ability to fully regenerate functional architecture.","authors":"Antonio S J Lee,&nbsp;Judy E Anderson,&nbsp;Josephine E Joya,&nbsp;Stewart I Head,&nbsp;Nalini Pather,&nbsp;Anthony J Kee,&nbsp;Peter W Gunning,&nbsp;Edna C Hardeman","doi":"10.4161/bioa.24966","DOIUrl":"https://doi.org/10.4161/bioa.24966","url":null,"abstract":"<p><p>While the general understanding of muscle regenerative capacity is that it declines with increasing age due to impairments in the number of muscle progenitor cells and interaction with their niche, studies vary in their model of choice, indices of myogenic repair, muscle of interest and duration of studies. We focused on the net outcome of regeneration, functional architecture, compared across three models of acute muscle injury to test the hypothesis that satellite cells maintain their capacity for effective myogenic regeneration with age. Muscle regeneration in extensor digitorum longus muscle (EDL) of young (3 mo-old), old (22 mo-old) and senescent female mice (28 mo-old) was evaluated for architectural features, fiber number and central nucleation, weight, collagen and fat deposition. The 3 injury paradigms were: a myotoxin (notexin) which leaves the blood vessels and nerves intact, freezing (FI) that damages local muscle, nerve and blood vessels and denervation-devascularization (DD) which dissociates the nerves and blood vessels from the whole muscle. Histological analyses revealed successful architectural regeneration following notexin injury with negligible fibrosis and fully restored function, regardless of age. In comparison, the regenerative response to injuries that damaged the neurovascular supply (FI and DD) was less effective, but similar across the ages. The focus on net regenerative outcome demonstrated that old and senescent muscle has a robust capacity to regenerate functional architecture. </p>","PeriodicalId":89329,"journal":{"name":"Bioarchitecture","volume":"3 2","pages":"25-37"},"PeriodicalIF":0.0,"publicationDate":"2013-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4161/bioa.24966","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31539750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 50
New insights on vertebrate olivo-cerebellar climbing fibers from computerized morphological reconstructions. 脊椎动物橄榄-小脑攀爬纤维的计算机形态重建新认识。
Bioarchitecture Pub Date : 2013-03-01 DOI: 10.4161/bioa.24062
Izumi Sugihara, Kerry M Brown, Giorgio A Ascoli
{"title":"New insights on vertebrate olivo-cerebellar climbing fibers from computerized morphological reconstructions.","authors":"Izumi Sugihara,&nbsp;Kerry M Brown,&nbsp;Giorgio A Ascoli","doi":"10.4161/bioa.24062","DOIUrl":"https://doi.org/10.4161/bioa.24062","url":null,"abstract":"<p><p>Characterization of neuronal connectivity is essential to understanding the architecture of the animal nervous system. Specific labeling and imaging techniques can visualize axons and dendrites of single nerve cells. Two-dimensional manual drawing has long been used to describe the morphology of labeled neuronal elements. However, quantitative morphometry, which is essential to understanding functional significance, cannot be readily extracted unless the detailed neuronal geometry is comprehensively reconstructed in three-dimensional space. We have recently applied an accurate and robust digital reconstruction system to cerebellar climbing fibers, which form highly dense and complex terminal arbors as one of the strongest presynaptic endings in the vertebrate nervous system. Resulting statistical analysis has shown how climbing fibers morphology is special in comparison to other axonal terminals. While thick primary branches may convey excitation quickly and faithfully to the far ends, thin tendril branches, which have a larger bouton density, form the majority of presynaptic outputs. This data set, now publicly available from NeuroMorpho.Org for further modeling and analysis, may constitute the first detailed and comprehensive digital reconstruction of the complete axonal terminal field with identified branch types and full accounting of boutons for any neuronal class in the vertebrate brain. </p>","PeriodicalId":89329,"journal":{"name":"Bioarchitecture","volume":"3 2","pages":"38-41"},"PeriodicalIF":0.0,"publicationDate":"2013-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4161/bioa.24062","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31497804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Rotary ATPases: models, machine elements and technical specifications. 旋转式atp酶:型号、机器部件及技术规格。
Bioarchitecture Pub Date : 2013-01-01 DOI: 10.4161/bioa.23301
Alastair G Stewart, Meghna Sobti, Richard P Harvey, Daniela Stock
{"title":"Rotary ATPases: models, machine elements and technical specifications.","authors":"Alastair G Stewart,&nbsp;Meghna Sobti,&nbsp;Richard P Harvey,&nbsp;Daniela Stock","doi":"10.4161/bioa.23301","DOIUrl":"https://doi.org/10.4161/bioa.23301","url":null,"abstract":"<p><p>Rotary ATPases are molecular rotary motors involved in biological energy conversion. They either synthesize or hydrolyze the universal biological energy carrier adenosine triphosphate. Recent work has elucidated the general architecture and subunit compositions of all three sub-types of rotary ATPases. Composite models of the intact F-, V- and A-type ATPases have been constructed by fitting high-resolution X-ray structures of individual subunits or sub-complexes into low-resolution electron densities of the intact enzymes derived from electron cryo-microscopy. Electron cryo-tomography has provided new insights into the supra-molecular arrangement of eukaryotic ATP synthases within mitochondria and mass-spectrometry has started to identify specifically bound lipids presumed to be essential for function. Taken together these molecular snapshots show that nano-scale rotary engines have much in common with basic design principles of man made machines from the function of individual \"machine elements\" to the requirement of the right \"fuel\" and \"oil\" for different types of motors.</p>","PeriodicalId":89329,"journal":{"name":"Bioarchitecture","volume":"3 1","pages":"2-12"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4161/bioa.23301","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31204510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 24
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信