Title: Lgr6 marks stem cells in the hair follicle that generate
all cell lineages of the skin Authors: Snippert HJ, Haegebarth A, Kasper M, Jaks V, van Es JH, Barker N, van de Wetering M, van den Born M, Begthel H, Vries RG, Stange DE, Toftgård R, Clevers H Date: March 2010 Publication Details: Science.
A whole network of these proteins is involved in giving embryonic stem (ES) cells pluripotency — the ability to generate all
the cell lineages of the body.
This latest study reports the generation of multiple
cell lineages of the eye, including the lens, cornea, and conjunctiva, using human induced pluripotent stem cells.
Not exact matches
To the contrary, it is more fantastic than we can imagine — hundreds
of billions (trillions)
of galaxies with hundreds
of billions (trillions)
of stars, nearly all
of which have planets, some right for life; planets so hot that they rain glass; stars made
of diamonds; the
lineage of animals from singled
celled organisms to the incredible variety that exists today with their unique adaptations.
The
lineage of scientific explanations discussed in the episode runs from Newton through Darwin, Einstein, chaos theory and, most recently, Murray
Cell - Mann, whose Santa Fe Institute devotes itself to the sciences
of complexity.
Specifically, they use a technique called
lineage tracing to mark stem
cells and follow the fate
of their progeny over time.
It is generally accepted that paternally imprinted X inactivation occurs exclusively in extraembryonic
lineages of mouse embryos, whereas
cells of the embryo proper, derived from the inner
cell mass (ICM), undergo only random X inactivation.
«To derive
lineages, people use soluble growth factors to get the
cells to differentiate,» explains Laura Kiessling, a UW - Madison professor
of chemistry and biochemistry and stem
cell expert.
In this study published in
Cell Reports, Alexandra Van Keymeulen and colleagues generated a new transgenic line - allowing lineage tracing of ER + luminal cells to investigate luminal cell heterogeneity and identify the origin of ER + luminal cells and the mechanisms regulating their pubertal expansion and adult maintena
Cell Reports, Alexandra Van Keymeulen and colleagues generated a new transgenic line - allowing
lineage tracing
of ER + luminal
cells to investigate luminal
cell heterogeneity and identify the origin of ER + luminal cells and the mechanisms regulating their pubertal expansion and adult maintena
cell heterogeneity and identify the origin
of ER + luminal
cells and the mechanisms regulating their pubertal expansion and adult maintenance.
«If ctenophores diverged first, these organ systems likely have been present in the common ancestor
of all animals — and sponges and placozoans must subsequently have lost them — or complex traits like nerve
cells and muscles must have emerged independently several times in different
lineages,» Wörheide explains.
Her pioneering work mapping the regulatory network
of dendritic
cells (DCs) identified a
lineage of DCs that is now considered a key target to improve antiviral and antitumor immunity.
The enzyme was tested in three different
cell lineages: leukemia
cells incapable
of producing asparagine at normal levels (MOLT4); another line
of leukemia
cells, in this case capable
of producing asparagine at normal levels (REH); and non-malignant
cells, used as a control (HUVECs).
In this process, several hundred times more
cells of the so - called myeloid
lineage (thrombocytes, erythrocytes, granulocytes, monocytes) form than long - lived lymphocytes (T
cells, B
cells, natural killer
cells) do.
Efforts to obtain and study genomes and enrichment cultures
of uncultivated microbial
lineages will likely further expand our knowledge about archaeal phylogenetic and metabolic diversity and their
cell biology and ecological function.
This general approach, known as
lineage - tracing, has been a mainstay
of classical developmental biology research and has greatly clarified knowledge
of tissue stem
cells during the last decade.
With DNA evidence as solid as that used to convict criminals, researchers can trace the shared genetic
lineage of life's different branches back to the very base
of the tree, some 4 billion years ago, when the interaction between primordial bacteria and viruses culminated in the «mother
cell,» the common ancestor
of all life on Earth.
Pancreatic cancer
cells are known to emit signals that shift the
lineage of in - rushing macrophages from M1 to immune - suppressing M2.
By March 2014 — about the time the epidemic was detected, but some 3 months after the first case actually occurred — the sequences had split into two distinct
lineages, one
of which was characterized by a single amino acid change in a region
of the virus's surface protein and allows it to bind to
cells.
Relative to reactions on naked DNA, there are changes (protections and enhancements) in the reactivity
of guanine residues to dimethyl sulfate within the enhancer sequence in myeloma, B, and early B
cells, whereas virtually no alterations appear in
cells of non-B
lineage.
All the muscles
of our faces develop from a strip
of cells at the base
of the embryonic head, just as they do in lampreys, which belong to one
of the oldest
lineages of vertebrates alive today.
This is a video
of rotating view
of neural precursor
cell tracks obtained from the
cell lineage reconstruction
of early Drosophila embryonic nervous system development.
He and his colleagues, including Janelia postdoc Fernando Amat, Janelia group leader Kristin Branson and former Janelia lab head Eugene Myers, who is now at the Max Plank Institute
of Molecular
Cell Biology and Genetics, have used the methodto reconstruct cell lineage during development of the early nervous system in a fruit
Cell Biology and Genetics, have used the methodto reconstruct
cell lineage during development of the early nervous system in a fruit
cell lineage during development
of the early nervous system in a fruit fly.
So if another
lineage of complex
cells were to evolve when there was already a well - adapted
lineage, the new arrival would probably...
All
of these steps can be carried out as quickly as images are acquired by the microscope, and the result is
lineage information for every
cell.
Cohen, whose background includes developing operating systems support for computer games, has developed a program called LEVER - short for
Lineage Editing and Validation program - that can identify, tag and track live
cells, capturing patterns
of motion and
cell division, using sequences
of microscopic time - lapse images.
They used their method to trace the
lineages of 295 neuroblasts (precursors
of nerve
cells) and discovered that it is possible to predict the future fate and function
of many
cells based on their early dynamic behavior.
So confused is the genetic history
of llamas that some are in fact chimeras; they have
cells in their bodies from two distinct maternal
lineages.
This video shows automated computational
cell lineage reconstruction
of the image data.
Only the
lineage of each
cell can tell the true story — the extent
of the damage and the repair mechanism.
Typically the process
of tracking
cell lineage over time requires biologists to watch the time - lapse images and note by hand when the
cells multiply - creating a graphic representation
of cell division over time called a «
lineage tree.»
But only after engaging the target and adjusting their antigen receptors over many generations (as B
cells do by mutating their antigen receptor genes) can this
lineage of cells produce VRC26 bnAbs.
The eye is composed
of highly specialized tissues that are derived from a variety
of cell lineages during development.
Andrabi therefore analyzed how B
cells in the VRC26
lineage changed in CAP256's blood in the course
of HIV infection.
While these mutations do not directly relate to the development or progression
of a tumor, they can reveal its
lineage — how individual tumor
cells are related to each other.
The ability
of a stem
cell of one
lineage to become another
lineage is called transdifferentiation.
Blood founder
cells showed a much lower propensity for aberrant methylation than did other founder
cells, which could explain why in the past scientists attributed the founder
cell to the effectiveness
of differentiating iPS
cells to the hematopoietic
lineage.
«We get almost all
lineages of blood
cells that you would expect from bone marrow.»
Foremost is that it is one
of the first to show the benefits
of using human iPS
cell - derived renal
lineage cells for
cell therapy.
Instead, they show the expression
of certain genes and DNA methylations were better indicators
of the efficiency at which a
cell line could be differentiated into the hematopoietic
lineage.
To trace the
lineage of liver
cells, scientists used a telltale marker — the
cells» response to signals delivered by a known stem -
cell regulator called Wnt.
It's a mystery,» he said, suggesting that it could mean stem
cells thought to be committed to a particular
lineage may be capable
of becoming other types
of tissue entirely.
These findings suggested that exhausted T
cells are a distinct
lineage of T
cells in and
of themselves instead
of just being effector or memory T
cells restrained by checkpoint pathways.
«Thanks to a genetically - modified mouse that makes the HMX3
lineage visible, we could uncover the origins
of neurogliaform
cells.
Using FACS we also found that all
of the F4 / 80 +
cells coexpressed the common leukocyte antigen CD45 and the monocyte
lineage marker CD11b (data not shown).
It has long been suspected that changes to
cells of the monocyte / macrophage
lineage, a type
of immune
cell, influence the development
of cognitive impairment in HIV.
The International Human Epigenome Consortium presents a series
of studies on how epigenetics influences immunity,
cell lineage determination, and differentiation.
The identity
of the
cells was further confirmed by
lineage tracing experiments, where the reprogrammed
cells were implanted in chicken embryos and acted just as neural crest
cells do.
Directed and step-wised differentiation
of embryonic stem
cells toward neuronal, cardiac and pancreatic
lineages
COURTESY SHENDURE AND SCHIER LABS CRISPR FOR FATE - MAPPING Researcher: Jay Shendure, Professor, Department
of Genome Sciences, University
of Washington Project: In collaboration with Alexander Schier's lab at Harvard University, Shendure's group came up with a new way to trace
cell lineages in
cell culture and in whole organisms — in this case, developing zebrafish.
This effort will combine deep knowledge
of immunological
lineages, clinical expertise and infrastructure needed to procure and process diverse samples, genomic and computational expertise to resolve the hundreds
of finely differentiated
cell - types that compose all facets
of the immune system, and the genomic signatures that define them.