SyBBURE Research Group

JOURNAL CLUB BLOG

Saturday, February 6, 2010

Journal Club, 2/9

Methods for inducing embryoid body formation: in vitro differentiation system of embryonic stem cells

Hiroshi Kurosawa

http://linkinghub.elsevier.com/retrieve/pii/S1389172307700786

We'd appreciate it if you get your PCRs in by 10 PM Monday.

15 comments:

  1. Rachel Harvey
    Kurosawa
    1. Different methods of EB formation will produce different results, and should be chosen accordingly.
    2. What does LIF do?
    3. Appropriate Culture Techniques for EBs
    4.It is interesting that in the spinner flask method, different rpm will induce differential growth.

    ReplyDelete
  2. Niki Arinze
    Kurosawa
    1. Of the current methods being used for the formation of embryoid bodies, there is little homogeneity in results?
    2. Why would Leukemia inducing actor prevent spontaneous differentiation?
    3. investigation of the effect of the variation of EB on experimental results
    4. It seems like there's real way to have repeatability or reproducibility in this field

    ReplyDelete
  3. Patrick Diggins
    Jurosawa
    1. Little attention is placed in the quality of EBs and the different protocols used to induce EB formation in papers at the moment.
    2. How spontaneous is the differentiation of ES cells in the absence of LIF or MEF feeder layers?
    3. Examples of when different techniques would be better than the others
    4. What is the role of probability or chance in the differentiation of the ES cells?

    ReplyDelete
  4. Ayeeshik Kole
    Jurosawa
    1. Most EB production protocols have been developed on an individual basis, and this outlines the benefits and disadvantages related to each method.
    2. How successful is creating homogenous EBs on a microfluidic platform?
    3. The problems with not implementing standard EB formation protocols in research

    ReplyDelete
  5. 1. There are different methods for producing embryoid bodies in vitro, and each method yields different results.
    2. How does LIF prevent differentiation?
    3. Possible examples concerning how different techniques of EB formation has produced different results for similar experiments.

    ReplyDelete
  6. Tommy Byrd
    Jurosawa
    1. Each method of culturing EBs has certain advantages and disadvantages; at this point researchers need to uncover how each method affects the EBs particular genotype.
    2. Where do most human stem cells come from? Are they primarily from preexisting lines, discarded embryos, or differentiated cells that have been converted back to an undifferentiated state?
    3. Specific applications for EB culture in research and medicine

    ReplyDelete
  7. Elizabeth
    Jurosawa
    1. There are several different methods to induce the differentiation of embrionic stem cells into 3 different embryoid bodies (ectoderm, endoderm, mesoderm).
    2. Are all ES cells in research initially pluripotent? Why not start with totipotent ones because they are still totipotent in the blastocyst which is from where the stem cells are acquired.
    3. Successful medical applications of ES/EB cells

    ReplyDelete
  8. Liwei Jiang
    Kurosawa
    1. Learned: different ways to form EBs. Homogeneity seems to be the most important factor.
    2. Pressing ?: Do the scalable production methods suffer in homogeneity compared to the laboratory, low-volume methods?
    3. Presentation: Summarize Figure 3.

    ReplyDelete
  9. Amy Ostrowski
    Kurosawa

    1. There are several different methods used to produce EBs, however there are andvantages and disadvangtes to each. It is important to determine a protocol which will consistently produce a large number of EBs in a controlled manner.

    2. Why is LIF effective in mouse cells but not in human cells?

    3. Examples of EBs used in research today and how incorrect culturing can affect results.

    ReplyDelete
  10. Stephen Arndt
    Kurosawa
    1. different methods of EB formation from cultured totipotent stem cells, but there are problems with homogeneity
    2. How do antidifferentiation factors work and how does one regress a cell back to an undifferentiated state from a more differentiated state. Also if you clone a clone does it age even faster than the original clone?
    3. presentation: where stems cells were supposed to be in 2010 as predicted in 1990 and 2000

    ReplyDelete
  11. 1. There are different methods for EB formation, and this has an important effect on the quality and homogeneity of stem cells.
    2. What is a feeder layer? How do you make one?
    3. The obstacles currently preventing stem cell therapy from being a viable medical procedure.

    ReplyDelete
  12. Samat Kabani
    Kurosawa

    1. There are several different methods of culturing EBs that producing varying quality and homogeneity.
    2. Have these methods been utilized by in SyBBURE? If so, which one(s)?
    3. Necessity of controlled procedure when working with stem cells

    ReplyDelete
  13. Rosie Korman
    Kurosawa
    1. There are severaldifferent methods for forming EBs, and each method has its specific advantages and disadvantages.
    2. What happens if an EB is allowed to grow indefinitely?
    Can human EBs be cultured on mouse feeder layers?
    3. Tissue types that can be produced by differentiated EBs.
    4.

    ReplyDelete
  14. Peter DelNero
    Kurosawa
    1. This article provided a review for methods of forming EBs. I did not know what an EB was before reading this article.
    2. Would this type of research on human embryonic stem cells be legal in the U.S. in 2007? Is it legal now? Why is it controversial?
    3. History of the development of embryonic stem cell research and the controversy surrounding it
    4. I thought it was interesting that you chose a review of literature as the journal article. I like that it provides a broader perspective on methods, but it also did not offer as much insight into the specific challenges that can be found in a research paper.

    ReplyDelete
  15. Chaitanya Allamneni
    Kurosawa

    1. This article covers the different methods for culturing embryoid bodies, specifically the suspension culture, methylcellulose culture, and hanging drop (which you are doing?)

    2. I noticed that the article mentioned that embryonic stem cells were pluripotent. Why are they not totipotent? Which cell types can EB's not differentiate into? At which stage do the EB's begin to differentiate.

    3. Functionality of cardiomyocytes differentiated from embryoid bodies; various factors that induce differentiation of EB's

    ReplyDelete

Note: Only a member of this blog may post a comment.