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BresGen Awarded US Patent

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BresGen has been awarded US Patent 7,432,104, “Methods for the culture of human embryonic stem cells on human feeder cells.”
 
The inventors listed on the patent are Maisam Mitalipova and Ian Lyons.
 
According to its abstract, the patent describes methods and cell culture medium for the generation of human pluripotent embryonic stem cells. Human embryonic stem cells are cultured with human granulosa feeder cells, muscle cells, fallopian ductal epithelial cells, bone marrow stromal cells, and skin fibroblasts, and the embryonic stem cells maintain their pluripotent phenotype. The human pluripotent embryonic stem cells can be cultured without feeder cells, and in the presence of supplemental growth factors. They can alternatively be cultured with conditioned medium obtained from a cell culture capable of maintaining human embryonic stem cells in a pluripotent state.

The Scan

Dropped Charges

The US Justice Department has dropped visa fraud charges against five Chinese researchers, according to the Wall Street Journal.

More Kids

The Associated Press says Moderna is expanding its SARS-CoV-2 vaccine study to included additional children and may include even younger children.

PNAS Papers on Rat Clues to Human Migration, Thyroid Cancer, PolyG-DS

In PNAS this week: ancient rat genome analysis gives hints to human migrations, WDR77 gene mutations in thyroid cancer, and more.

Purnell Choppin Dies

Purnell Choppin, a virologist who led the Howard Hughes Medical Institute, has died at 91, according to the Washington Post.