Tag Archives: Cell biology

Transplants: human-pig embryos from stem cells

Scientists have for the first time grown embryos that contain a combination of pig and human stem cells, in a step toward one day growing transplantable organs, a study said on Thursday.

However, the research remains at a very early stage and proved more difficult than expected, the researchers reported in the peer-reviewed journal Cell.

“This is an important first step,” said lead investigator Juan Carlos Izpisua Belmonte, a professor in the Salk Institute of Biological Studies’ Gene Expression Laboratory.

“The ultimate goal is to grow functional and transplantable tissue or organs, but we are far away from that.”

Scientists implanted adult human
Read More…

Umbilical Stem Cells May Help Recover Lost Vision for Those With Corneal Disease

Image via Wikipedia

CINCINNATI—New research from the University of Cincinnati may help in the recovery of lost vision for patients with corneal scarring.

Winston Whei-Yang Kao, PhD, professor of ophthalmology, along with other researchers in UC’s ophthalmology department found that transplanting human umbilical mesenchymal stem cells into mouse models that lack the protein lumican restored the transparency of cloudy and thin corneas.

Mesenchymal stem cells are “multi-potent” stem cells that can differentiate into a variety of cell types.

These findings are being presented Dec. 8 in San Diego at the 49th Annual Meeting of the American Society of Cell Biology.

“Corneal transplantation is currently
Read More…

Blood Vessel Cells Are Key to Growing Unlimited Amounts of Adult Stem Cells

Howard Hughes Medical Institute (HHMI) scientists have discovered that endothelial cells, the building blocks of the vascular system, keep blood stem cells dividing healthily in a lab dish much longer and more effectively than previous methods of growing the cells. The new advance dramatically improves scientists’ ability to manufacture large quantities of authentic adult blood stem cells, which may help revolutionize the field of bone marrow transplantation.

Shahin Rafii, an HHMI investigator at Weill Cornell Medical College in New York City, and his colleagues report on the development of an endothelial cell platform that supports self-renewal of the blood stem
Read More…

Wisconsin Stem Cell Symposium to focus on blood

World stem cell leaders will converge on Promega’s BioPharmaceutical
Technology Center in Fitchburg, Wisconsin, on April 30 for the 9th
Annual Wisconsin Stem Cell Symposium: From Stem Cells to Blood.

Coordinated by the nonprofit BioPharmaceutical Technology Center Institute, the University of Wisconsin-Madison Stem Cell and Regenerative Medicine Center
and the UW-Madison Blood Research Program, this year’s symposium is
focused on how the stem cells that give rise to blood develop and
function.

It will also look at the diversity of insights stem cell
studies have provided other fields.

Highlighted topics include genesis and regulation of progenitor cells
and hematopoietic stem cells, stem cell genomes/epigenomes, stem cell
microenvironment, and tumor initiating
Read More…

Source of invasive bladder cancer found

Philip Beachy, PhD, professor of biochemistry and of developmental biology, said they’ve learned that, at an intermediate stage during cancer progression, a single cancer stem cell and its progeny can quickly and completely replace the entire bladder lining.

With their model in place, the researchers then conducted two main experiments in the mice: In the first experiment, they looked to see what would happen in animals exposed to BBN when the sonic-hedgehog-expressing cells were marked with a distinctive fluorescent color. In the second, they used genetic techniques to selectively kill those same cells in animals prior to exposure with BBN.

In
Read More…