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.



World's Oldest Person, a Brazilian Nun, Dies Aged 116

Nuns walk down stairs in the center of Rome on April 30, 2025. (Photo by GABRIEL BOUYS / AFP)
Nuns walk down stairs in the center of Rome on April 30, 2025. (Photo by GABRIEL BOUYS / AFP)
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World's Oldest Person, a Brazilian Nun, Dies Aged 116

Nuns walk down stairs in the center of Rome on April 30, 2025. (Photo by GABRIEL BOUYS / AFP)
Nuns walk down stairs in the center of Rome on April 30, 2025. (Photo by GABRIEL BOUYS / AFP)

The world's oldest person, Brazilian nun Inah Canabarro Lucas, died Wednesday at the age of 116, having barely survived infancy and attributing her long life to God, her order and two longevity trackers said.

The title now passes to Ethel Caterham, a resident of Surrey, England, who is 115 years old, according to the US Gerontological Research Group (GRG) and the LongeviQuest database.

Born on June 8, 1908, Canabarro became the world's oldest person following the death in January of Japanese woman Tomiko Itooka, who was also aged 116.

The Congregation of Teresian Sisters of Brazil in Porto Alegre announced Canabarro's passing Wednesday in a statement in which it gave thanks "for the dedication and devotion" she had shown in life, AFP reported.

LongeviQuest, in an obituary, said Canabarro had been a frail child, and "many doubted she would survive."

She became a nun in 1934 at the age of 26, between World Wars I and II.

Canabarro had attributed her longevity to God, saying: "He is the secret of life. He is the secret of everything," according to LongeviQuest.

For her 110th birthday, she received a blessing from Pope Francis, who himself died last Monday aged 88.

Although she had claimed her date of birth was May 27, 1908, "her documented birth date according to records is June 8, 1908," GRG director Robert Young told AFP in January.

LongeviQuest said Canabarro had been the 15th-oldest documented person in history, and the second-oldest nun after France's Lucile Randon, who lived to the age of 118 and died in 2023.