Cells
in sentence
1993 examples of Cells in a sentence
So what we did was we took this bone marrow, grew up the stem
cells
in the lab, and then injected them back into the vein.
I don't think myself that what's happened is that those stem
cells
have made new myelin or new nerves.
What I think they've done is they've promoted the endogenous stem cells, or precursor cells, to do their job, wake up, lay down new myelin.
I do believe that the disruptive technologies like stem
cells
that I've tried to explain to you do offer very real hope.
For over 100 years, neuroanatomists and later neuroscientists held the view that after initial development in childhood, no new brain
cells
could grow in the adult human brain.
But then, in the 1990s, studies starting showing, following the lead of Elizabeth Gould at Princeton and others, studies started showing the evidence of neurogenesis, the birth of new brain
cells
in the adult mammalian brain, first in the olfactory bulb, which is responsible for our sense of smell, then in the hippocampus involving short-term memory, and finally in the amygdala itself.
However, mice reared in what we called an enriched environment, a large habitation with other mice with wheels and ladders and areas to explore, demonstrate neurogenesis, the birth of new brain cells, and as we showed, they also perform better on a range of learning and memory tasks.
In some areas of the brain, more than 20 percent of
cells
are newly formed.
We're just beginning to understand what exact function these
cells
have, but what it implies is that the brain is capable of extraordinary change way into adulthood.
Stress hormones, glucocorticoids, released by the brain, suppress the growth of these new
cells.
Wouldn't it be better if, while serving his sentence, Joe was able to train his amygdala, which would stimulate the growth of new brain
cells
and connections, so that he will be able to face the world once he gets released?
But the most amazing thing is that there are three billion billion billion of these tiny
cells
on the planet, and we didn't know they existed until 35 years ago.
About 38 years ago, we were playing around with a technology in my lab called flow cytometry that was developed for biomedical research for studying
cells
like cancer cells, but it turns out we were using it for this off-label purpose which was to study phytoplankton, and it was beautifully suited to do that.
And here's how it works: so you inject a sample in this tiny little capillary tube, and the
cells
go single file by a laser, and as they do, they scatter light according to their size and they emit light according to whatever pigments they might have, whether they're natural or whether you stain them.
To make a long story short, it was tiny, tiny little cells, less than one-one hundredth the width of a human hair that contain chlorophyl.
If you shine blue light on that same sample, this is what you see: two tiny little red light-emitting
cells.
And it was about that time that I became so smitten by these little
cells
that I redirected my entire lab to study them and nothing else, and my loyalty to them has really paid off.
Their deep blue water is teeming with a hundred million Prochlorococcus
cells
per liter.
In fact, those
cells
that live in the bottom of the sunlit zone are the most efficient photosynthesizers of any known cell.
And we've been able to sequence the genomes of cultures that we have, but also recently, using flow cytometry, we can isolate individual
cells
from the wild and sequence their individual genomes, and now we've sequenced hundreds of Prochlorococcus.
We are more intelligent than a mere rat, to be sure, but our brains have the same basic structure, the same types of cells, the same chemicals running through them, and the same parasites.
On the other side of the channel, the nerve then attaches to cells, skin
cells
and muscle
cells.
Alright, let me tell you about building synthetic
cells
and printing life.
Self-replicating living
cells
and things like vaccines and therapeutics that work in ways that were previously impossible.
That vision was, because all of the functions and characteristics of all biological entities, including viruses and living cells, are written into the code of DNA, if one can read and write that code of DNA, then they can be reconstructed in a distant location.
Like an author of a book, this started out as writing short sentences, or sequences of DNA code, but this soon turned into writing paragraphs and then full-on novels of DNA code, to make important biological instructions for proteins and living
cells.
Living
cells
are nature's most efficient machines at making new products, accounting for the production of 25 percent of the total pharmaceutical market, which is billions of dollars.
We knew that writing DNA would drive this bioeconomy even more, once
cells
could be programmed just like computers.
Through a lot of trial and error, we developed a procedure where we could reprogram
cells
and even convert one bacterial species into another, by replacing the genome of one cell with that of another.
The massive efforts to create synthetic
cells
have made us world leaders at writing DNA.
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