共查询到20条相似文献,搜索用时 46 毫秒
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Katharine M Hardy Tatiana A Yatskievych JH Konieczka Alexander S Bobbs Parker B Antin 《BMC developmental biology》2011,11(1):20
Background
FGF signalling regulates numerous aspects of early embryo development. During gastrulation in amniotes, epiblast cells undergo an epithelial to mesenchymal transition (EMT) in the primitive streak to form the mesoderm and endoderm. In mice lacking FGFR1, epiblast cells in the primitive streak fail to downregulate E-cadherin and undergo EMT, and cell migration is inhibited. This study investigated how FGF signalling regulates cell movement and gene expression in the primitive streak of chicken embryos. 相似文献2.
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Ni Wayan Kurniani Karja Kazuhiro Kikuchi Mokhamad Fahrudin Manabu Ozawa Tamás Somfai Katsuhiko Ohnuma Junko Noguchi Hiroyuki Kaneko Takashi Nagai 《Reproductive biology and endocrinology : RB&E》2006,4(1):54-12
Background
Recent work has shown that glucose may induce cell injury through the action of free radicals generated by autooxidation or through hypoxanthine phosphoribosyltransferase inhibition. The effect of glucose during early in vitro culture (IVC) period of porcine embryos on their developmental competence, contents of reactive oxygen species (ROS) and glutathione (GSH), and the quality of the blastocysts yielded was examined. 相似文献4.
Walid E Maalouf Zichuan Liu Vincent Brochard Jean-Paul Renard Pascale Debey Nathalie Beaujean Daniele Zink 《BMC developmental biology》2009,9(1):11-10
Background
Genome reprogramming in early mouse embryos is associated with nuclear reorganization and particular features such as the peculiar distribution of centromeric and pericentric heterochromatin during the first developmental stage. This zygote-specific heterochromatin organization could be observed both in maternal and paternal pronuclei after natural fertilization as well as in embryonic stem (ES) cell nuclei after nuclear transfer suggesting that this particular type of nuclear organization was essential for embryonic reprogramming and subsequent development. 相似文献5.
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Yan Dong Aliona Bogdanova Bianca Habermann Wolfgang Zachariae Julie Ahringer 《BMC developmental biology》2007,7(1):19
Background
RNA interference coupled with videorecording of C. elegans embryos is a powerful method for identifying genes involved in cell division processes. Here we present a functional analysis of the gene B0511.9, previously identified as a candidate cell polarity gene in an RNAi videorecording screen of chromosome I embryonic lethal genes. 相似文献7.
Background
The Rho-kinases (ROCKs) are major effector targets of the activated Rho GTPase that have been implicated in many of the Rho-mediated effects on cell shape and movement via their ability to affect acto-myosin contractility. The role of ROCKs in cell shape change and motility suggests a potentially important role for Rho-ROCK signaling in tissue morphogenesis during development. Indeed, in Drosophila, a single ROCK ortholog, DRok, has been identified and has been found to be required for establishing planar cell polarity. 相似文献8.
Zhong-hai Yan Yi-ye Zhou Jing Fu Fei Jiao Lei-wen Zhao Peng-fei Guan Shu-zhen Huang Yi-tao Zeng Fanyi Zeng 《BMC developmental biology》2010,10(1):31
Background
The interaction between the karyoplast and cytoplast plays an important role in the efficiency of somatic cell nuclear transfer (SCNT), but the underlying mechanism remains unclear. It is generally accepted that in nuclear transfer embryos, the reprogramming of gene expression is induced by epigenetic mechanisms and does not involve modifications of DNA sequences. In cattle, oocytes with various mitochondrial DNA (mtDNA) haplotypes usually have different ATP content and can further affect the efficiency of in vitro production of embryos. As mtDNA comes from the recipient oocyte during SCNT and is regulated by genes in the donor nucleus, it is a perfect model to investigate the interaction between donor nuclei and host oocytes in SCNT. 相似文献9.
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Richard L Mort Thaya Ramaesh Dirk A Kleinjan Steven D Morley John D West 《BMC developmental biology》2009,9(1):4
Background
The mouse corneal epithelium is a continuously renewing 5–6 cell thick protective layer covering the corneal surface, which regenerates rapidly when injured. It is maintained by peripherally located limbal stem cells (LSCs) that produce transient amplifying cells (TACs) which proliferate, migrate centripetally, differentiate and are eventually shed from the epithelial surface. LSC activity is required both for normal tissue maintenance and wound healing. Mosaic analysis can provide insights into LSC function, cell movement and cell mixing during tissue maintenance and repair. The present study investigates cell streaming during corneal maintenance and repair and changes in LSC function with age. 相似文献11.
Joao Suzuki Jr Jacinthe Therrien France Filion Rejean Lefebvre Alan K Goff Lawrence C Smith 《BMC developmental biology》2009,9(1):9-13
Background
Embryo in vitro manipulations during early development are thought to increase mortality by altering the epigenetic regulation of some imprinted genes. Using a bovine interspecies model with a single nucleotide polymorphism, we assessed the imprinting status of the small nuclear ribonucleoprotein polypeptide N (SNRPN) gene in bovine embryos produced by artificial insemination (AI), in vitro culture (IVF) and somatic cell nuclear transfer (SCNT) and correlated allelic expression with the DNA methylation patterns of a differentially methylated region (DMR) located on the SNRPN promoter. 相似文献12.
Navneet Sharma Shiying Liu Lin Tang Jackie Irwin Guoliang Meng Derrick E Rancourt 《BMC developmental biology》2006,6(1):61
Background
We have recently reported the expression of murine Implantation Serine Proteinase genes in pre-implantation embryos (ISP1) and uterus (ISP1 and ISP2). These proteinases belong to the S1 proteinase family and are similar to mast cell tryptases, which function as multimers. 相似文献13.
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Milla Mikkola Cia Olsson Jaan Palgi Jarkko Ustinov Tiina Palomaki Nina Horelli-Kuitunen Sakari Knuutila Karolina Lundin Timo Otonkoski Timo Tuuri 《BMC developmental biology》2006,6(1):40-11
Background
Individual differences between human embryonic stem cell (hESC) lines are poorly understood. Here, we describe the derivation of five hESC lines (called FES 21, 22, 29, 30 and 61) from frozen-thawed human embryos and compare their individual differentiation characteristic. 相似文献15.
Heini Kallio Silvia Pastorekova Jaromir Pastorek Abdul Waheed William S Sly Susanna Mannisto Markku Heikinheimo Seppo Parkkila 《BMC developmental biology》2006,6(1):22
Background
Of the thirteen active carbonic anhydrase (CA) isozymes, CA IX and XII have been linked to carcinogenesis. It has been suggested that these membrane-bound CAs participate in cancer cell invasion, which is facilitated by an acidic tumor cell environment. Since active cell migration is a characteristic feature of embryonic development, we set out to explore whether these isozymes are expressed in mouse embryos of different ages. The studies were focused on organogenesis stage. 相似文献16.
Background
The ability to detect nuclei in embryos is essential for studying the development of multicellular organisms. A system of automated nuclear detection has already been tested on a set of four-dimensional (4D) Nomarski differential interference contrast (DIC) microscope images of Caenorhabditis elegans embryos. However, the system needed laborious hand-tuning of its parameters every time a new image set was used. It could not detect nuclei in the process of cell division, and could detect nuclei only from the two- to eight-cell stages. 相似文献17.
Background
High cooling rates with vitrification can be achieved through the use of carriers that allow cryopreservation in fluid volumes < one μl. Open carriers allow direct contact of embryos with liquid nitrogen (LN2) whereas closed carrier systems sequester the embryo within a sealed system during immersion in LN2. The use of closed systems may be preferable to reduce the possibility of cross-contamination. In the present study, we compare open and closed carriers for vitrification of embryos. We also examine their ability to retain embryo viability during vapor phase transport. 相似文献18.
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