Stamping Bar Codes on Cells To Solve Medical Mysteries (nytimes.com) 14
No one really knew why some patients with a white blood cell cancer called chronic lymphocytic leukemia, or C.L.L., relapsed after treatment and got a second cancer. Were some cancer cells just resistant? An unexpected answer to this mystery has been found using a new technique that researchers call bar coding: The treatment does not always target the right cells. From a report: Scientists discovered that the cancer does not always originate in the mature bone marrow cells where it is found and where textbooks say it originates. Instead, for some patients, the mother lode of the cancer can be primitive bone marrow cells, the stem cells, that give rise to all of the body's white and red blood cells. Those cells, not affected by the chemotherapy treatment, can spawn new cancer cells, causing a relapse. The discovery is one early fruit of the bar coding method, which is aiding the study of the origins of cancer and other diseases. The results are too new to have led to patient therapies. But they are leading to provocative discoveries that are expected to inspire novel methods for treating diseases.
The method works by marking individual cells with a stamp that is passed on to all of a cell's progeny. Researchers can look at a cell, note its bar code and trace its lineage back to its parents, grandparents, great-grandparents -- all the way back to its origins -- because each cell that arose from the original bar coded cell has the same stamp. The idea for bar coding during embryonic development originated with Dr. Jay Shendure and his colleagues at the University of Washington, and this class of methods was anointed the breakthrough of the year by Science magazine in 2018. Now there is a variety of methods for bar coding ranging from embryo cells to cancer cells to mature cells.
For example, Dr. Shendure and another group of colleagues at the University of Pennsylvania are using bar codes in mice with pancreatic cancer to study the spread of cancer cells in their bodies. In the case of C.L.L. above, Dr. Vijay Sankaran at Boston Children's Hospital and his colleagues bar coded human cancer cells by taking advantage of innocuous, naturally occurring mutations that mark individual cells and are inherited by their progeny. Bar coding, Dr. Sankaran said, "starts to give us a view of cancer that we never had before."
The method works by marking individual cells with a stamp that is passed on to all of a cell's progeny. Researchers can look at a cell, note its bar code and trace its lineage back to its parents, grandparents, great-grandparents -- all the way back to its origins -- because each cell that arose from the original bar coded cell has the same stamp. The idea for bar coding during embryonic development originated with Dr. Jay Shendure and his colleagues at the University of Washington, and this class of methods was anointed the breakthrough of the year by Science magazine in 2018. Now there is a variety of methods for bar coding ranging from embryo cells to cancer cells to mature cells.
For example, Dr. Shendure and another group of colleagues at the University of Pennsylvania are using bar codes in mice with pancreatic cancer to study the spread of cancer cells in their bodies. In the case of C.L.L. above, Dr. Vijay Sankaran at Boston Children's Hospital and his colleagues bar coded human cancer cells by taking advantage of innocuous, naturally occurring mutations that mark individual cells and are inherited by their progeny. Bar coding, Dr. Sankaran said, "starts to give us a view of cancer that we never had before."
Innocuous naturally occurring mutations (Score:2)
So they were perfectly fine until they hit bar code # 666
which is the combination of genes that starts the demon Horde!
I love this stuff (Score:2)
Ya, but ... (Score:2)
You've got a LOT of cells and bar-coding them sounds great until you accidentally go through the check-out line with a cashier that wants scan each one separately instead of just one and punching in "x 1,000,000".
The crazies are gonna have a field day with this (Score:3)
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Hmm (Score:2)
"The method works by marking individual cells with a stamp that is passed on to all of a cell's progeny." Technically, every cell already has a unique bar code, you don't need to mark them. Every time a cell divides, the copy is rarely exact. In normal, average, human cell division there will be one or two mutations (out of a couple billion --not bad.) The problem is that our sequencing technology is not good enough to catch the delta between two cells that just divided .. at least not easily .. some may cl
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What if you wanted to track which lymphocytes where produced by the thymus rather than the spleen? Creating a "bar code" for the thymus lymphocytes might allow the scientists to track abnormal activity. Or track red blood cells produced in only the left femur? I can see a few instances where flagging a specific group of cells might lead to incites, other than huge genome modifications like modifying cells to produce luminescent tracking.
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Star Trek was right?! (Score:3)
Anyone remember the dozens of Star Trek [TNG/VOY/DS9/etc] episodes where there's some medical thing and they zoom in and you have a nice bar-code stamped something or other?
Always thought it was a Hollywood thing, now you're telling me bar coding biological things is real?!
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"Fish?" (Score:1)
That's Some Real Blade Runner Kind of Shit (Score:2)
n/t
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