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Seminars in Developmental Biology最新文献

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Gastrulation in the nematode Caenorhabditis elegans 秀丽隐杆线虫的原肠胚形成
Seminars in Developmental Biology Pub Date : 1994-04-01 DOI: 10.1006/SEDB.1994.1016
E. A. Bucher, G. Seydoux
{"title":"Gastrulation in the nematode Caenorhabditis elegans","authors":"E. A. Bucher, G. Seydoux","doi":"10.1006/SEDB.1994.1016","DOIUrl":"https://doi.org/10.1006/SEDB.1994.1016","url":null,"abstract":"Abstract Gastrulation in Caenorhabditis elegans has been described by following the movements of individual nuclei in living embryos by Nomarski microscopy. Gastrulation starts in the 26-cell stage when the two gut precursors, Ea and Ep, move into the blastocoele. The migration of Ea and Ep does not depend on interactions with specific neighboring cells and appears to rely on the earlier fate specification of the E lineage. In particular, the long cell cycle length of Ea and Ep appears important for gastrulation. Later in embryogenesis, the precursors to the germline, muscle and pharynx join the E descendants in the interior. As in other organisms, the movement of gastrulation permit novel cell contacts that are important for the specification of certain cell fates.","PeriodicalId":101155,"journal":{"name":"Seminars in Developmental Biology","volume":"22 1","pages":"121-130"},"PeriodicalIF":0.0,"publicationDate":"1994-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80025729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 13
Introduction: Gastrulation 简介:原肠胚形成
Seminars in Developmental Biology Pub Date : 1994-04-01 DOI: 10.1006/sedb.1994.1009
Maria Leptin
{"title":"Introduction: Gastrulation","authors":"Maria Leptin","doi":"10.1006/sedb.1994.1009","DOIUrl":"https://doi.org/10.1006/sedb.1994.1009","url":null,"abstract":"","PeriodicalId":101155,"journal":{"name":"Seminars in Developmental Biology","volume":"5 2","pages":"Pages 67-68"},"PeriodicalIF":0.0,"publicationDate":"1994-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1006/sedb.1994.1009","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91624100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cell-cell interactions and the control of sex determination in hydra 水螅细胞间的相互作用和性别决定的控制
Seminars in Developmental Biology Pub Date : 1994-02-01 DOI: 10.1006/sedb.1994.1003
C.Lynne Littlefield
{"title":"Cell-cell interactions and the control of sex determination in hydra","authors":"C.Lynne Littlefield","doi":"10.1006/sedb.1994.1003","DOIUrl":"10.1006/sedb.1994.1003","url":null,"abstract":"<div><p>Sexual phenotype in gonochoristic species of hydra (species having separate males and females) is ultimately determined by cells committed to the sperm pathway. Little is known about the genetic basis for determining sex during embryogenesis, but the sex ratio of offspring is generally 1 : 1, implying a genetic component. Sexual phenotype of adult hydra is labile and sex-reversal in both directions can be induced by experimental manipulations involving addition or loss of the sperm lineage. Loss of the sperm lineage is induced by high temperature, causing males to switch to females. Introduction of the sperm lineage into females by grafting causes sex-reversal to male. These studies provide support for a model of sex determination based on cell-cell interactions.</p></div>","PeriodicalId":101155,"journal":{"name":"Seminars in Developmental Biology","volume":"5 1","pages":"Pages 13-20"},"PeriodicalIF":0.0,"publicationDate":"1994-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1006/sedb.1994.1003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86776845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 19
Germline-soma relationships in ciliated protozoa: the inception and evolution of nuclear dimorphism in one-celled animals 纤毛原生动物的生殖系-体细胞关系:单细胞动物核二态性的开始和进化
Seminars in Developmental Biology Pub Date : 1994-02-01 DOI: 10.1006/sedb.1994.1002
Glenn Herrick
{"title":"Germline-soma relationships in ciliated protozoa: the inception and evolution of nuclear dimorphism in one-celled animals","authors":"Glenn Herrick","doi":"10.1006/sedb.1994.1002","DOIUrl":"10.1006/sedb.1994.1002","url":null,"abstract":"<div><p>Unique features of ciliates are reviewed in the framework of a speculative series of evolutionary transitions: a uninucleate protozoan gave rise to a multinucleate unicell and then a nuclear dimorphic unicell, with a germline micronucleus and a differentially amplified somatic macronucleus, possibly before the divergence of ciliates and heterokaryotic foraminiferans. Ciliates evolved to proliferate only in the diploid state. Macronuclear DNA fragmentation and amitotic karyokinesis arose multiple times. Variability arises in the macronucleus, a potential source of selectable diversity, and probably the cause of clonal senescence. Transposons may have played a role in micronuclear silencing, and proliferate rapidly in hypotrichous ciliate germlines due to their precise elimination from the developing macronucleus before its genes are expressed.</p></div>","PeriodicalId":101155,"journal":{"name":"Seminars in Developmental Biology","volume":"5 1","pages":"Pages 3-12"},"PeriodicalIF":0.0,"publicationDate":"1994-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1006/sedb.1994.1002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81729436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 29
Interactions between Sertoli cells and germ cells in the testis 睾丸内支持细胞和生殖细胞之间的相互作用
Seminars in Developmental Biology Pub Date : 1994-02-01 DOI: 10.1006/sedb.1994.1008
Michael P. McGuinness, Michael D. Griswold
{"title":"Interactions between Sertoli cells and germ cells in the testis","authors":"Michael P. McGuinness,&nbsp;Michael D. Griswold","doi":"10.1006/sedb.1994.1008","DOIUrl":"10.1006/sedb.1994.1008","url":null,"abstract":"<div><p>The production of mature spermatozoa requires a complex interaction between Sertoli cells and germ cells. Sertoli cells regulate aspects of germ cell division and differentiation while germ cells provide signals that modulate Sertoli cell functions. Germ cells can undergo some differentiation independent of Sertoli cells but at certain crucial points the interaction with Sertoli cells is required. There are several means by which this interaction may occur: (1) direct contact of components of the plasma membrane may act as a signal; (2) secondary messengers could be exchanged via gap junctions; (3) the secretion of paracrine factors may facilitate intercellular communication.</p></div>","PeriodicalId":101155,"journal":{"name":"Seminars in Developmental Biology","volume":"5 1","pages":"Pages 61-66"},"PeriodicalIF":0.0,"publicationDate":"1994-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1006/sedb.1994.1008","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75842238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 26
Interactions between germ cells and somatic cells in Drosophila melanogaster 果蝇生殖细胞与体细胞的相互作用
Seminars in Developmental Biology Pub Date : 1994-02-01 DOI: 10.1006/sedb.1994.1005
Mary Bownes
{"title":"Interactions between germ cells and somatic cells in Drosophila melanogaster","authors":"Mary Bownes","doi":"10.1006/sedb.1994.1005","DOIUrl":"10.1006/sedb.1994.1005","url":null,"abstract":"<div><p>Interactions between germ cells and somatic cells are important at several stages of Drosophila development. The types of interactions that will be discussed include: (1) molecules physically transferred from one cell to another; (2) long range interactions by hormones; and (3) local interactions between germ cells and somatic cells when they are in close proximity. These interactions have been mostly characterized during oogenesis.</p></div>","PeriodicalId":101155,"journal":{"name":"Seminars in Developmental Biology","volume":"5 1","pages":"Pages 31-42"},"PeriodicalIF":0.0,"publicationDate":"1994-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1006/sedb.1994.1005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84929128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Somatic control of germ cell development in Caenorhabditis elegans 秀丽隐杆线虫生殖细胞发育的体细胞控制
Seminars in Developmental Biology Pub Date : 1994-02-01 DOI: 10.1006/sedb.1994.1004
Robert Clifford, Ross Francis, Tim Schedl
{"title":"Somatic control of germ cell development in Caenorhabditis elegans","authors":"Robert Clifford,&nbsp;Ross Francis,&nbsp;Tim Schedl","doi":"10.1006/sedb.1994.1004","DOIUrl":"10.1006/sedb.1994.1004","url":null,"abstract":"<div><p>Germ cell development in Caenorhabditis elegans involves three processes: a shift from the mitotic to the meiotic cell cycle; the adoption of a male or female sexual identity; and differentiation into a functional gamete. All three aspects of germline development appear to be regulated, at least in part, by the soma. We discuss cell ablation, genetic and molecular studies that have shed light on the nature of the signal transduction systems mediating intercellular communication between germline and somatic tissues of the nematode.</p></div>","PeriodicalId":101155,"journal":{"name":"Seminars in Developmental Biology","volume":"5 1","pages":"Pages 21-30"},"PeriodicalIF":0.0,"publicationDate":"1994-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1006/sedb.1994.1004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91497579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 14
Germline and soma: interactions during early mouse development 生殖系和体细胞:小鼠早期发育过程中的相互作用
Seminars in Developmental Biology Pub Date : 1994-02-01 DOI: 10.1006/sedb.1994.1006
Anne McLaren
{"title":"Germline and soma: interactions during early mouse development","authors":"Anne McLaren","doi":"10.1006/sedb.1994.1006","DOIUrl":"10.1006/sedb.1994.1006","url":null,"abstract":"<div><p>Mouse germ cells during their migratory period depend for their survival, proliferation and guidance on growth factors and/or extracellular matrix produced by somatic tissue. The somatic development of the ovary appears more affected by the absence of germ cells than is the testis. Some factor emanating from testicular somatic tissue, probably from Sertoli cells, inhibits germ cells from entering meiosis before birth and thus induces them to embark on spermatogenesis rather than oogenesis. Genomic imprinting must also reflect some somatic influence.</p></div>","PeriodicalId":101155,"journal":{"name":"Seminars in Developmental Biology","volume":"5 1","pages":"Pages 43-49"},"PeriodicalIF":0.0,"publicationDate":"1994-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1006/sedb.1994.1006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90074633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 27
Oocyte-somatic cell communication in the ovarian follicles of mammals 哺乳动物卵泡中卵母细胞-体细胞的通讯
Seminars in Developmental Biology Pub Date : 1994-02-01 DOI: 10.1006/sedb.1994.1007
John J. Eppig
{"title":"Oocyte-somatic cell communication in the ovarian follicles of mammals","authors":"John J. Eppig","doi":"10.1006/sedb.1994.1007","DOIUrl":"10.1006/sedb.1994.1007","url":null,"abstract":"<div><p>This paper reviews the communication between the developing follicular germ cell, the oocyte, and its companion somatic cells, the granulosa cells. Both gap junctions and paracrine factors mediate this communication. Direct transfer of low molecular weight factors through the gap junctions is essential for oocyte growth and the regulation of meiosis. Paracrine factors secreted by granulosa cells, such as the c-kit ligand, also participate in these processes. Oocytes secrete paracrine factors that affect follicular organization, granulosa cell proliferation, and the ability of cumulus granulosa cells to produce hyaluronic acid. Thus the bidirectional communication between the germ cell and the somatic components of the ovarian follicle is essential for the development and function of both.</p></div>","PeriodicalId":101155,"journal":{"name":"Seminars in Developmental Biology","volume":"5 1","pages":"Pages 51-59"},"PeriodicalIF":0.0,"publicationDate":"1994-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1006/sedb.1994.1007","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73185769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 62
Introduction: Soma-germline interactions 简介:体细胞-种系相互作用
Seminars in Developmental Biology Pub Date : 1994-02-01 DOI: 10.1006/sedb.1994.1001
Anne McLaren
{"title":"Introduction: Soma-germline interactions","authors":"Anne McLaren","doi":"10.1006/sedb.1994.1001","DOIUrl":"10.1006/sedb.1994.1001","url":null,"abstract":"","PeriodicalId":101155,"journal":{"name":"Seminars in Developmental Biology","volume":"5 1","pages":"Pages 1-2"},"PeriodicalIF":0.0,"publicationDate":"1994-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1006/sedb.1994.1001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"107946977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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