Results 11 to 20 of about 3,983 (179)

Integrin-Dependent Apposition of Drosophila Extraembryonic Membranes Promotes Morphogenesis and Prevents Anoikis [PDF]

Current Biology, 2004
Two extraembryonic tissues form early in Drosophila development. One, the amnioserosa, has been implicated in the morphogenetic processes of germ band retraction and dorsal closure. The developmental role of the other, the yolk sac, is obscure.By using live-imaging techniques, we report intimate interactions between the amnioserosa and the yolk sac ...
Reed, Bruce H, Wilk, Ronit, Schöck, Frieder, Lipshitz, Howard D   +3 more
openaire   +4 more sources

Isolation of Oct4-expressing extraembryonic endoderm precursor cell lines. [PDF]

PLoS ONE, 2009
BACKGROUND:The extraembryonic endoderm (ExEn) defines the yolk sac, a set of membranes that provide essential support for mammalian embryos. Recent findings suggest that the committed ExEn precursor is present already in the embryonic Inner Cell Mass ...
Bisrat G Debeb, Vasiliy Galat, Jessica Epple-Farmer, Steve Iannaccone, Wendy A Woodward, Michael Bader, Philip Iannaccone, Bert Binas   +7 more
doaj   +4 more sources

Trophoblast biology: Forum introduction [PDF]

Reproductive Biology and Endocrinology, 2004
In mammals, a carefully orchestrated dialogue between the mother and conceptus (embryo/fetus and associate extraembryonic membranes) is initiated during the peri-implantation period of pregnancy as the trophoblast develops, functions to signal pregnancy ...
Bazer Fuller W, Spencer Thomas E
doaj   +2 more sources

Steroid receptors and their regulation in avian extraembryonic membranes provide a novel substrate for hormone mediated maternal effects. [PDF]

Sci Rep, 2019
Exposure of the vertebrate embryo to maternal hormones can have long-lasting effects on its phenotype, which has been studied extensively by experimentally manipulating maternal steroids, mostly androgens, in bird eggs.
Kumar N, Kumar N, Lohrentz A, Gahr M, Groothuis TGG.   +4 more
europepmc   +3 more sources

Liver X Receptor α (LXRα) Regulates 5β-Reductase (AKR1D1) Expression in Avian Embryos: Implications for Yolk Steroid Metabolism. [PDF]

J Exp Zool A Ecol Integr Physiol
ABSTRACT Steroid‐mediated maternal effects are well‐studied as a source of phenotypic variation. In bird eggs, the yolk contains various steroids that can influence embryonic development. However, one complicating factor in understanding how yolk steroids affect development is that the embryo metabolizes yolk steroids to regulate exposure.
Paitz RT, Waters SE, Reynolds DK, Drew EM, Harders EP.   +4 more
europepmc   +2 more sources

Chorioallantoic Membrane Assay at the Cross-Roads of Adipose-Tissue-Derived Stem Cell Research

Cells, 2023
With a history of more than 100 years of different applications in various scientific fields, the chicken chorioallantoic membrane (CAM) assay has proven itself to be an exceptional scientific model that meets the requirements of the replacement ...
Dmytro Oliinyk, Andreas Eigenberger, Oliver Felthaus, Silke Haerteis, Lukas Prantl   +4 more
doaj   +1 more source

Oldest preserved umbilical scar reveals dinosaurs had ‘belly buttons’

BMC Biology, 2022
Background In egg-laying amniotes, the developing embryo is tethered to a number of the extraembryonic membranes including the yolk sac and allantois that deliver oxygen and nutrients and remove metabolic waste products throughout embryonic development ...
Phil R. Bell, Christophe Hendrickx, Michael Pittman, Thomas G. Kaye   +3 more
doaj   +1 more source

In ovo model in cancer research and tumor immunology

Frontiers in Immunology, 2022
Considering cancer not only as malignant cells on their own but as a complex disease in which tumor cells interact and communicate with their microenvironment has motivated the establishment of clinically relevant 3D models in past years.
Lea Miebach, Lea Miebach, Julia Berner, Julia Berner, Julia Berner, Sander Bekeschus, Sander Bekeschus   +6 more
doaj   +1 more source

New Insights Into the Role of β-NGF/TrKA System in the Endometrium of Alpacas During Early Pregnancy

Frontiers in Veterinary Science, 2021
One striking reproductive feature in South American camelids is that more than 90% of gestations are established in the left uterine horn (LUH). This phenomenon could be related to a differential vascular irrigation of the LUH.
Daniela E. Barraza, Luciana M. Sari, Silvana A. Apichela, Silvana A. Apichela, Marcelo H. Ratto, Martin E. Argañaraz, Martin E. Argañaraz   +6 more
doaj   +1 more source

The effect of methenamine on vascular development: Experimental investigation using in vivo and insilico methods

International Journal of Reproductive BioMedicine, 2020
Background: Methenamine is a worldwide antibacterial agent for urinary system infections in human and animals. The effect of methenamine consumption during early phase of pregnancy is not fully clarified in previous studies.
Hadi Tavakkoli, Masoud Imani, Mohammad Rahchamani Seyyed, Mohsen Rezvani   +3 more
doaj   +1 more source