Did you know that it took sixteen years for sperm to develop? Neither did I. That's what I learned in this remarkable article about sperm cells being developed by scientists from embryonic stem cells.
Could human life begin with them? Not yet but probably soon.
Tags: stem cells, stroke, fda
- Clusters of mouse embryonic stem cells called embryoid bodies more closely approximate true embryos in organization and structure than previously thought, according to researchers at the Stanford University School of Medicine. Harnessing the signals that influence the cells' fate may help researchers more accurately direct the differentiation of embryonic stem cells for use in therapy.
The researchers found
that embryoid bodies have hallmarks of gastrulation -- a remarkable developmental step that launches a hollow ball of cells toward becoming an organism with three distinct types of precursor cells. The scientists showed that this process is initiated by a single signaling pathway in embryoid bodies and in real embryos. Enhancing or blocking this signal affects what the cells become, the scientists found.
http://www.pr-inside.com/stanford-research-sheds-light-on-key-r903395.htm
Tags: Embryoid Bodies
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Many people hoped those products would be therapies, essentially stem cells grown into replacement cells that could be transplanted to replace cells or tissue destroyed by disease.
While that hope has not died, scientists are learning it remains distant. Science must overcome several issues, such as immune-system rejection of transplanted cells or the risk of the cells creating tumors, said Joseph Wu, of Stanford University's School of Medicine.
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The proposal to loosen restrictions on embryonic stem-cell research in Michigan passed early this morning as election results trickled in from across the state. The initiative was up 52%-48%, with 87% of precincts reporting, mirroring an exit poll conducted for the Free Press and other media outlets. The vote was 2,143,101 in favor to 1,945,035 against.
Proposal 2 would amend the state constitution to allow Michigan researchers to use embryos left over from fertility treatments to create embryonic stem-cell lines for disease research. It is currently prohibited to destroy an embryo for "nontherapeutic" purposes, and is illegal to donate an embryo to science.
Michigan has great research universities that were previously hamstrung by the repressive law in the state. That situation is now altered. To the more conservative voters of Michigan, --there will be more chances to review this decision but the discussion need to continue from the basis of more experience. We will find out what embryonic stem cells mean to humanity. Now, Michigan will be a more meaningful participant in the discussion.
Tags: ESC, Stem Cells, Prop 2, Michigan, Proposal 2
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Obama seems to have a limiting view on ESC research
Saddleback Forum Video & Transcript: Obama / McCain with Rick Warren « Kingdom People
This is another indication of stem cell involvement with cancer
“Present chemotherapy modalities eliminate the bulk of the tumor cells, but cannot eliminate a core of these cancer stem cells that have a high capacity for renewal,” said Mor, who is also a member of the Yale Cancer Center. “Identification of these cells, as we have done here, is the first step in the development of therapeutic modalities.”
Mor and colleagues isolated cells from 80 human samples of either peritoneal fluid or solid tumors. The cancer stem cells that were identified were positive for traditional cancer stem cell markers including CD44 and MyD88. These cells also showed a high capacity for repair and self-renewal.
The isolated cells formed tumors 100 percent of the time. Within those tumors, 10 percent of the cells were positive for cancer stem cell marker CD44, while 90 percent were CD44 negative.
Mor and his team were able to isolate and clone the ovarian cancer stem cells. They found that these cells were highly resistant to conventional chemotherapy while the non-cancer stem cells responded to treatment. “Isolating and cloning these cells will lead to development of new treatments to target and eliminate the cancer stem cells and hopefully prevent recurrence,” said Mor.
Ovarian cancer stem cells identified, characterized
