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Early embryonic mass that gives rise to the fetus
The inner cell mass (ICM) or embryoblast (known as the pluriblast in marsupials) is a structure in the early development of a mammalian embryo. It is
Inner_cell_mass
Structure formed around day 5 of mammalian embryonic development
possesses an inner cell mass (ICM) also known as the embryoblast which subsequently forms the embryo, and an outer layer of epithelial cells called the
Blastocyst
Type of pluripotent blastocystic stem cell
Embryonic stem cells (ESCs) are pluripotent stem cells derived from the inner cell mass of a blastocyst, an early-stage pre-implantation embryo. Human
Embryonic_stem_cell
Process by which animal embryos form and develop
and an inner cell mass, from which the embryo is developed. Fluid collects between the trophoblast and the greater part of the inner cell-mass, and thus
Animal_embryonic_development
Cells that give rise to the embryo in amniote development
known as the primitive ectoderm) is one of two distinct cell layers arising from the inner cell mass in the mammalian blastocyst, or from the blastula in
Epiblast
Unspecialized biological cell that can become specialized
roughly 50 to 150 cells make up the inner cell mass during the blastocyst stage of embryonic development, around days 5–14. These have stem-cell capability.
Stem_cell
Embryonic cell structure
structure of cells formed in an embryo. In the development of the human embryo this takes place by day eight. It is formed when the inner cell mass, also known
Bilaminar_embryonic_disc
Embryonic inner cell mass tissue that forms the yolk sac and, later, chorion
embryology, the hypoblast is one of two distinct layers arising from the inner cell mass in the mammalian blastocyst, or from the blastodisc in reptiles and
Hypoblast
Organism composed of cells of different genotypes
embryos. ES cells from the inner cell mass of an implanted blastocyst can contribute to all cell lineages of a mouse including the germ line. ES cells are a
Chimera_(genetics)
Fluid-filled or yolk-filled cavity that forms in the blastula
mass fate and the external layer becoming trophectoderm. The inner cell mass will go on to become the actual embryo. The external, surrounding cells develop
Blastocoel
Sphere of cells formed during early embryonic development in animals
differentiated inner cell mass and an outer trophectoderm. The blastula (from Greek βλαστός (blastos meaning sprout)) is a hollow sphere of cells known as blastomeres
Blastulation
Early embryonic structure that gives rise to the placenta
trophectoderm, the outer layer of epithelial cells of the blastocyst. The trophectoderm is a temporary layer of cells. At the beginning of implantation, on attachment
Trophoblast
Pregnancy between species
trophoblastic cells, are exposed to the antibodies, only these cells will be destroyed by subsequent exposure to complement. The remaining inner cell mass can be
Interspecific_pregnancy
Embryoblast of metatherian mammals, analogous to the inner cell mass of eutherians
pluriblast is a pluripotent population of cells in the embryogenesis of marsupials, called the inner cell mass in eutherians. The pluriblast is distinct
Pluriblast
Development and formation of the human embryo
of forming the blastocyst. Cells differentiate into an outer layer of cells called the trophoblast, and an inner cell mass. With further compaction the
Human_embryonic_development
Process in early embryonic development
into two groups. The internal cells become the inner cell mass, and the outer cells become the trophoblast. Before cell differentiation takes place there
Cavitation_(embryology)
Sac in which the fetus develops in amniotes
nutrients and protection to the developing embryo. They form from the inner cell mass; the first to form is the yolk sac followed by the amnion which grows
Amniotic_sac
Early embryonic cell
the 32-cell stage. There are two main models for differentiation that determine which blastomere cells will divide into either the inner cell mass or the
Blastomere
diploid somatic cells and haploid gametes. diverticulum ectoderm embryo embryo transfer embryoblast Another name for the inner cell mass, i.e. that portion
Glossary of developmental biology
Glossary_of_developmental_biology
Primary layer of cells in embryonic development
blastocyst, consisting of an outer layer called a trophoblast, and an inner cell mass called the embryoblast. Filled with uterine fluid, the blastocyst breaks
Germ_layer
Ability of a cell to differentiate into other cell types
a 16-cell stage, the totipotent cells of the morula differentiate into cells that will eventually become either the blastocyst's inner cell mass or the
Cell_potency
Inactivation of copies of X chromosome
the cells of the inner cell mass (which give rise to the embryo), and in these cells both X chromosomes become active again. Each of these cells then
X-inactivation
Method of creating a cloned embryo by replacing the egg nucleus with a body cell nucleus
stage is developed by the egg to help create embryonic stem cells from the inner cell mass of the blastocyst. The first mammal to be developed by this
Somatic_cell_nuclear_transfer
(during gastrulation) from the epiblast (a portion of the mammalian inner cell mass). "Embryonic Period (Weeks 3-8)". www.med.umich.edu. Retrieved 11 June
Trilaminar_embryonic_disc
Transformation of a stem cell to a more specialized cell
cells called the inner cell mass. The cells of the inner cell mass go on to form virtually all of the tissues of the human body. Although the cells of
Cellular_differentiation
Period of reproduction
blastocyst means that two types of cells are forming, an inner-cell mass growing on the interior of the blastocele and cells growing on the exterior of it
Pregnancy_(mammals)
First stage of pregnancy
Ultimately, the inner cell mass (also embryoblast), inside the trophoblast layer, is aligned closest to the decidua. If the inner cell mass is not aligned
Implantation_(embryology)
Mammalian protein found in Homo sapiens
stem cell differentiation during the development of a mammalian embryo. It plays a vital role in determining the fates of both inner mass cells and embryonic
Oct-4
Basic unit of life forms
Symbiosis in Cell Evolution detailing how eukaryotic cells were created by symbiogenesis. List of human cell types The Inner Life of the Cell Parakaryon
Cell_(biology)
Topics referred to by the same term
apophony in linguistics Insertable cardiac monitor, a small device Inner cell mass, a structure in the early development of an embryo Iodinated contrast
ICM
Rare medical condition
split into two, but still have one blastocyst. This will lead to one inner cell mass and one blastocyst. Then, as the twins develop, they will share the
Craniopagus_parasiticus
Infraclass of mammals in the clade Metatheria
aspects of the first stages of placental embryo development, such as the inner cell mass and the process of compaction, are not found in marsupials. The cleavage
Marsupial
Division of cells in the early embryo
cluster of cells the same size as the original zygote. The different cells derived from cleavage are called blastomeres and form a compact mass called the
Cleavage_(embryo)
Fibroblast growth factor gene
molecule critical for cell survival, proliferation, and patterning. It facilitates the survival and growth of the inner cell mass during the postimplantation
FGF4
Pluripotent stem cell generated directly from a somatic cell
differentiated cells. Chimeric mice: hESCs naturally reside within the inner cell mass (embryoblast) of blastocysts, and in the embryoblast, differentiate
Induced_pluripotent_stem_cell
Mammalian protein found in Homo sapiens
the inner cell mass. As embryonic stem cells are derived from the inner cell mass at the blastocyst stage, removing them from the inner cell mass also
Leukemia_inhibitory_factor
Type of stem cell
of rodent), the inner cell mass (ICM) of a fertilized embryo segregates into two layers: hypoblast and epiblast. The epiblast cells are the functional
Epiblast-derived_stem_cell
pipette. This technique is used to isolate the inner cell mass of the blastocyst. The trophoectoderm's cell junctions and tight epithelium "shield" the ICM
Immunosurgery
Failure of an embryo to implant
inner cell mass - the group of cells within the blastocyst that go on to form the embryo - starts to expand, lysin enzymes secreted by the inner cell
Repeated_implantation_failure
Protein-coding gene in the species Homo sapiens
in mouse models of disease to impair T cell and B cell development, and functionally deletes mature T and B cells from the immune system. In humans, RAG
RAG1
Epigenetic phenomenon
epigenetic marks, such as DNA methylation, during mammalian development or in cell culture. Such control is also often associated with alternative covalent
Reprogramming
Protein-coding gene in the species Homo sapiens
magnitude similar to that associated with BRCA2 mutations and PALB2-deficient cells are sensitive to PARP inhibitors. PALB2 was recently identified as a susceptibility
PALB2
Mammalian protein found in Homo sapiens
superfamily). Like many other members of this superfamily it is involved in cell differentiation in early embryogenesis, playing a key role in signal transfer
Nodal_homolog
Study of cell types during embryogenesis
grows to form the placenta. The cells of the inner cell mass (embryoblast), which are known as human embryonic stem cells (hESCs), will further differentiate
Embryomics
Biological process where inactive X chromosomes are reactivated
inner cell mass (ICM) of the epiblast after imprinted XCI in preimplantation development, the Xi is reactivated. In migrating primordial germ cells (PGCs)
X-chromosome_reactivation
Biological membrane that separates the interior of a cell from its outside environment
cell membrane Cell cortex – Layer on the inner face of a cell membrane Cell damage – Damaging changes to a biological cell, including damage to cell membrane
Cell_membrane
surrounded by a single layer of cells called the trophectoderm and the inner cell mass. The fetus is developed from the inner cell mass while the placenta is derived
Morphokinetics_IVF
Medical condition
identical twinning as "splitting or fission" of either the inner cell mass of pleuripotent cells or early embryonic disc at 13–14 days of gestation just
Craniopagus_twins
Innermost membranous sac that surrounds and protects a developing embryo
sac, and appears in the inner cell-mass as a cavity. This cavity is roofed in by a single stratum of flattened, ectodermal cells, the amniotic ectoderm
Amnion
Culture of stem cells that can be propagated indefinitely
vitro.[citation needed] An embryonic stem cell line is created from cells derived from the inner cell mass of a blastocyst, an early stage, pre-implantation
Stem-cell_line
Protein-coding gene in animals
oncogenesis and in several developmental processes, including regulation of cell fate and patterning during embryogenesis. This gene is a member of the WNT
WNT1
Layer on the inner face of a cell membrane
morula. Also, differences in cortical tension drives the sorting of the inner cell mass and trophectoderm progenitors during the formation of the morula, the
Cell_cortex
Genetic profiling of embryos prior to implantation
quality of the throphectoderm and inner cell mass, and their degree of expansion. As PGD can be performed on cells from different developmental stages
Preimplantation genetic diagnosis
Preimplantation_genetic_diagnosis
Cells on the inside of the ball contract instead due to the mechanical force of being on the inside and they become determined to be the inner cell mass
Embryonic differentiation waves
Embryonic_differentiation_waves
Mammalian protein found in Homo sapiens
cells decreased cell proliferation in both cell cultures and mice through demethylation of promoters of the WNT signaling pathway. Breast cancer cell
Tet methylcytosine dioxygenase 1
Tet_methylcytosine_dioxygenase_1
Medical condition
non-disjunction can occur in a trophoblast cell or a non-fetal cell from the inner cell mass creating a trisomic cell line in the tissue which is destined to
Confined_placental_mosaicism
Mammalian protein found in humans
transcriptional factor that helps embryonic stem cells (ESCs) maintain pluripotency by suppressing cell determination factors. hNanog is encoded in humans
Homeobox_protein_NANOG
Protein-coding gene in the species Homo sapiens
tyrosine phosphorylation sites from human T cells using immobilized metal affinity chromatography and tandem mass spectrometry". Anal. Chem. 76 (10): 2763–72
LATS1
Protein-coding gene in the species Homo sapiens
The encoded protein may have a role in spermatogenesis, cell cycle control, and in meiotic cell division. In yeasts, the Dom34-Hbs1 complex (with ABCE1)
Protein_pelota_homolog
Protein found in humans
embryo epiblast Gonadal ridge embryo neural plate primitive streak inner cell mass paraxial mesoderm More reference expression data BioGPS n/a Gene ontology
Left-right determination factor 2
Left-right_determination_factor_2
stiffness-controlled transcription factor Cdx leads to the ectopic expression of inner cell mass markers in the trophectoderm, and the pluripotent transcription factor
Mechanobiology
Chinese-American biochemist
(2010-08-26). "Role of Tet proteins in 5mC to 5hmC conversion, ES-cell self-renewal and inner cell mass specification". Nature. 466 (7310): 1129–1133. Bibcode:2010Natur
Yi_Zhang_(biochemist)
South Korean scientific misconduct scandal
trophoblast cells that are destined to become the placenta, discarding the inner cell mass that would form the placenta. When the trophoblast cells were cultured
Hwang_affair
Ethical concerns about embryonic stem cell research and medical use
differentiated into distinct organ tissue, making cells of the inner cell mass no more "human" than a skin cell. Some parties contend that embryos are not human persons
Stem_cell_controversy
Tissue lining the surfaces of organs in animals
fast-growing, easily regenerated epithelial cells. A specialised form of epithelium, endothelium, forms the inner lining of blood vessels and the heart, and
Epithelium
Non-coding RNA
chromosome to become imprinted and inactivated. Some cells develop into pluripotent cells (the inner cell mass) when the blastocyte forms. There, the imprint
XIST
Cell type
derived from the trophectoderm. As the trophectoderm separates from the inner cell mass during blastulation, early trophoblasts begin to form the placenta
Extravillous_trophoblast
Protein-coding gene in the species Homo sapiens
Knockdown of SBDS expression results in increased apoptosis in erythroid cells undergoing differentiation due to elevated ROSTooltip reactive oxygen species
SBDS
Protein-coding gene in the species Homo sapiens
I and condensin II to mitotic chromosome architecture in vertebrate cells". Cell. 115 (1): 109–21. doi:10.1016/S0092-8674(03)00724-4. PMID 14532007. S2CID 18811084
NCAPG2
Type of neuron
cells terminate in the inner layer of the inner plexiform layer. Bipolar cells effectively transfer information from rods and cones to ganglion cells
Retina_bipolar_cell
Protein-coding gene in the species Homo sapiens
analysis of the human CDC5L complex and identification of its components by mass spectrometry". EMBO J. 19 (23): 6569–81. doi:10.1093/emboj/19.23.6569. ISSN 0261-4189
PRPF19
Gene known for its role in breast cancer
BRCA1 are normally expressed in the cells of breast and other tissue, where they help repair damaged DNA or destroy cells if DNA cannot be repaired. They
BRCA2
Protein found in hums
GRIP1, AIB) of coactivators. It is responsible for moving cells toward the inner cell mass in developing blastocysts. CARM1 plays an important role in
CARM1
Protein-coding gene in the species Homo sapiens
embryonic stem cells and embryonic carcinoma cells. Its expression is rapidly reduced upon differentiation. UTF1 protein is localized to the cell nucleus, where
UTF1
British embryologist and geneticist
ectoplacental cone and secondary giant cells in mouse blastocysts reconstituted from isolated trophoblast and inner cell mass". Journal of Embryology and Experimental
Richard Gardner (embryologist)
Richard_Gardner_(embryologist)
Nutrition of the mother during pregnancy
egg or the zygote becomes a blastocyst where the outer layer and the inner cell mass differentiate to form placenta and the fetus respectively. Implantation
Prenatal_nutrition
Biological process
dispensable in undifferentiated cell types, such as the inner cell mass of the blastocyst, primordial germ cells or embryonic stem cells. Since DNA methylation
DNA_methylation
British primatologist (born 1969)
C., Leese, H.J. (1993) Energy metabolism of the trophectoderm and inner cell mass of the mouse blastocyst. J Exp Zool. 267:337-343. Hewitson, L.C., Martin
Laura_Hewitson
British biologist of Polish descent
(April 2010). "Origin and formation of the first two distinct cell types of the inner cell mass in the mouse embryo". Proceedings of the National Academy
Magdalena_Żernicka-Goetz
Form of localized cell signaling
signaling is a form of cell signaling, a type of cellular communication in which a cell produces a signal to induce changes in nearby cells, altering the behaviour
Paracrine_signaling
Protein-coding gene in the species Homo sapiens
and miRNA-373 as oncogenes in testicular germ cell tumors". Cell. 124 (6): 1169–81. doi:10.1016/j.cell.2006.02.037. PMID 16564011. Aylon Y, Michael D
LATS2
DNA located in mitochondria
mtDNA replication is specific to the cells of the trophectoderm. In contrast, the cells of the inner cell mass restrict mtDNA replication until they
Mitochondrial_DNA
Protein-coding gene in the species Homo sapiens
(September 2013). "The cell-cycle state of stem cells determines cell fate propensity". Cell. 155 (1): 135–147. doi:10.1016/j.cell.2013.08.031. PMC 3898746
SOX17
Protein-coding gene in the species Homo sapiens
that context. It is phosphorylated in M phase of the cell cycle. Phosphorylation regulates the cell cycle-dependent distribution of this protein, with a
NDEL1
Protein family
5 days and is confined to the trophectoderm, being absent from the inner cell mass. From 8.5 days, Cdx2 begins to be expressed in embryonic tissues, principally
Cdx_protein_family
Protein-coding gene in the species Homo sapiens
have been implicated in developmental processes including regulation of cell fate and patterning during embryogenesis, as well as in oncogenesis. This
WNT10B
Taiwanese-born American philosopher
extraction method, which removes enough pluripotent stem cells from the inner cell mass to form a stem cell line without harming the embryo. Liao has also argued
S._Matthew_Liao
Moment a being is said to gain a soul
five days after fertilization, when certain cells separate off from the ICM (the embryo's inner cell mass) to form the trophectoderm. The entire collection
Ensoulment
Three-dimensional aggregate of pluripotent stem cells
derived), the embryo undergoes differentiation, whereby cell specification of the inner cell mass results in the formation of the hypoblast and epiblast
Embryoid_body
Extracellular proteoglycan
Cameo M (December 2004). "Exogenous interferon-gamma alters murine inner cell mass and trophoblast development. Effect on the expression of ErbB1, ErbB4
Perlecan
Marker in embryonic stem cells
protein kinases. During embryogenesis, the inner cell mass (ICM) is separated from the trophoblast. The stem cells derived from the ICM and trophectoderm
Rex1
Developmental and Stem Cell Biologist
blastula inner cell mass cells/embryonic stem cells and neural crest cells led LaBonne's group to proposed a new model in which neural crest cells arose
Carole_LaBonne
Protein-coding gene in the species Homo sapiens
replication#GINS Explains role of GINS during DNA replication in eukaryotic cells. GRCh38: Ensembl release 89: ENSG00000101003 – Ensembl, May 2017 GRCm38:
GINS1
Mammalian protein found in Homo sapiens
"Cell-specific involvement of HNF-1beta in alpha(1)-antitrypsin gene expression in human respiratory epithelial cells". Am. J. Physiol. Lung Cell Mol
HNF1B
Mixture of stem cells that can be obtained from amniotic fluid
it remains unclear whether the cells originate from the fetus itself, the placenta or possibly the inner cell mass of the blastocyst. Comparison of
Amniotic_stem_cells
Protein-coding gene in humans
corepressor for members of the nuclear hormone receptor superfamily". Mol. Cell. Biol. 19 (5): 3383–94. doi:10.1128/mcb.19.5.3383. PMC 84131. PMID 10207062
COPS2
Protein-coding gene in the species Homo sapiens
and Elicit Synergy with TRAPs in Activator-Induced Transcription". Mol. Cell. Biol. 21 (20): 6882–94. doi:10.1128/MCB.21.20.6882-6894.2001. PMC 99865
TAF8
from that stem cell. Embryonic stem cells are pluripotent stem cells derived from the inner cell mass of the blastocyst. These stem cells can differentiate
Stem cell laws and policy in the United States
Stem_cell_laws_and_policy_in_the_United_States
Protein-coding gene in the species Homo sapiens
stages to the blastocyst, where it is found in some cells of the trophectoderm and inner cell mass (ICM), from which mouse ESCs are derived. SALL4 is an
SALL4
Ethics of neuroscience, and the neuroscience of ethics
of embryonic stem cells (hESCs). As the name states, hESCs come from embryos. To be more specific, they come from the inner cell mass of a blastophere
Neuroethics
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INNER CELL-MASS
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INNER CELL-MASS
INNER CELL-MASS
INNER CELL-MASS
INNER CELL-MASS
INNER CELL-MASS
INNER CELL-MASS
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