Scientists 3D Print Human Heart Muscles

 A human embryonic stem cell line derived at Stanford
University. (REUTERS/Julie Baker/Stanford University School of
Medicine/California Institute for Regenerative Medicine/Handout)
A human embryonic stem cell line derived at Stanford University. (REUTERS/Julie Baker/Stanford University School of Medicine/California Institute for Regenerative Medicine/Handout)
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Scientists 3D Print Human Heart Muscles

 A human embryonic stem cell line derived at Stanford
University. (REUTERS/Julie Baker/Stanford University School of
Medicine/California Institute for Regenerative Medicine/Handout)
A human embryonic stem cell line derived at Stanford University. (REUTERS/Julie Baker/Stanford University School of Medicine/California Institute for Regenerative Medicine/Handout)

Heart diseases are the leading cause of death in the United States killing more than 600,000 people a year. A team of researchers at the University of Minnesota has 3D printed a functioning human heart pump in the lab, which could help save the lives of thousands of patients.

According to the Science Daily website, the researchers used a type of stem cells with the potential to develop into any type of cell in the body, in addition to a mix of proteins, and the printer's ink.

The heart muscle model is about 1.5 centimeters long and was specifically designed to fit into the abdominal cavity of a mouse for further study, the German News Agency reported.

The team said the new muscle can be used to study the functions of the heart, and the problems that might affect it.

Brenda Ogle from the Department of Biomedical Engineering in the University of Minnesota College, said this is a critical advance in heart research because this new study shows how we were able to 3D print heart muscle cells in a way that the cells could organize and work together.

"We now have a model to track and trace what is happening at the cell and molecular level. We can introduce disease and damage into the model and then study the effects of medicines and other therapeutics," she explained.



Mexico Barred from Sending Cattle to US over Flesh-eating Pest

US agriculture officials are closing the southern border to cattle due to concerns over a flesh-eating pest detected in Mexican herds - AFP
US agriculture officials are closing the southern border to cattle due to concerns over a flesh-eating pest detected in Mexican herds - AFP
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Mexico Barred from Sending Cattle to US over Flesh-eating Pest

US agriculture officials are closing the southern border to cattle due to concerns over a flesh-eating pest detected in Mexican herds - AFP
US agriculture officials are closing the southern border to cattle due to concerns over a flesh-eating pest detected in Mexican herds - AFP

The US Secretary of Agriculture has announced ports will be closed to the livestock trade at the southern border after Mexican cattle tested positive for the flesh-eating New World screwworm (NWS), AFP reported.

"The United States has promised to be vigilant -- and after detecting this new NWS case, we are pausing the planned port reopening's to further quarantine and target this deadly pest in Mexico," Secretary Brooke Rollins said in a statement.

President Donald Trump's administration on May 11 announced a halt on imports of live cattle, horses and bison over the southern border because of an outbreak of the screwworm fly, whose flesh-eating larvae can kill cattle.

Mexico resumed cattle exports to the United States on Monday after mitigation efforts, following Washington's announcement that it was gradually lifting the nearly two-month pause.