Search Results for: totipotent

Perspectives on Lee Lab F1000 Paper that STAP Cell Method Does Not Work

GFP+-germ-cells

A paper has been published reporting that repeated attempts to make so-called “acid bath stem cells” have failed. At the end of January it was claimed in two Nature papers that a mild acid treatment created pluripotent or even totipotent stem cells that that the authors termed “STAP cells” or “STAP stem cells” (collectively referred …

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Reactions to New On-Line Vacanti Lab STAP Cell Protocol

STAP-Cell-Protocol-Page

The Vacanti Lab at Brigham and Women’s Hospital/Harvard Medical School has now posted online their own version of the STAP cell production protocol. The thing that first struck me most strongly about this published protocol is that it is not the same protocol reported in the Nature papers and it also is not the same …

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Reactions to RIKEN’s STAP cell protocol

STAP-from-T-cells

A small group of the STAP authors via RIKEN have now released a detailed protocol also available at Nature Protocol Exchange for making STAP stem cells entitled “Essential technical tips for STAP cell conversion culture from somatic cells”. This comes about 5 weeks after publication of their Nature STAP stem cell papers. 2020 update: With the 4th and …

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STAP stem cell update 2.0: method isn’t working so far, investigations & more

LOW-RES-credit-Haruko-Obokata.jpg

Today may be a turning point in the STAP stem cell story. Nature itself opened up in a newsy piece about the events that have occurred in the past couple weeks since they published two related papers on acid/other stimulus-induced powerful pluripotent or totipotent stem cells (aka STAP stem cells). Update: Science also published a …

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Latest developments and scoops on STAP stem cells

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Acid-induced pluripotent or even totipotent stem cells, called STAP stem cells, have thrown the stem cell field for a bit of a loop. For more background see my interview with the key public face of STAP, Dr. Charles Vacanti, as well as my review of their paper, my top 5 reasons for skepticism, and some other thoughts. Do you believe in …

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In a pickle over STAP stem cells: main reasons for skepticism

in-a-pickle

If you take an ordinary cucumber and soak it in a mild acid solution of vinegar for a few weeks you get a pickle, which is where we find STAP stem cells. Recently, some scientists reported in Nature that if you take ordinary cells and soak them in a mild acid solution for 30 minutes, …

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Review of Obokata STAP cells Nature papers

STAP-stem-cells

In two Nature papers (here and here) published today researchers report the astounding finding of reprogramming differentiated cells back to a pluripotent or even totipotent state simply by exposing the cells to extreme environmental stress, creating cells they called STAP cells. Update: see more thoughts on STAP stem cells here. No genes. No proteins. No …

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