Last Updated on November 9, 2022 by The Health Master
If proven safe and effective, manufactured blood cells could, over time, revolutionize treatments for people with blood disorders such as sickle cell and rare blood types, the researchers said.
It can be difficult to find enough well-matched donated blood for some people with these disorders, they said.
The team, including researchers from the University of Cambridge in the UK, said the blood cells were made from stem cells from donors.
The red cells were then transfused into healthy volunteers.
This is the first time in the world that red blood cells that have been made in a laboratory have been given to another person as part of a trial into blood transfusion, they said.
“We hope our lab-made red blood cells will last longer than those that come from blood donors,” said chief investigator Cedric Ghevaert, a professor at the University of Cambridge and NHS Blood Transplant.
“If our trial, the first of its kind in the world, is successful, it will mean that patients who currently require regular long-term blood transfusions will need fewer transfusions in the future, helping transform their care,” Ghevaert said in a statement.
The trial is studying the lifespan of the lab-made cells compared with infusions of standard red blood cells from the same donor.
The lab-made blood cells are all fresh, so the trial team expects them to perform better than a similar transfusion of standard donated red blood cells, which contains cells of varying ages, the researchers said.
If manufactured cells last longer in the body, patients who regularly need blood may not need transfusions as often, reducing iron overload from frequent blood transfusions, which can lead to serious complications, they said.
“This challenging and exciting trial is a huge stepping stone for manufacturing blood from stem cells,” said Ashley Toye, a professor at the University of Bristol.
“This is the first-time lab-made blood from an allogeneic donor has been transfused, and we are excited to see how well the cells perform at the end of the clinical trial,” Toye said.
For the foreseeable future, manufactured cells could only be used for a very small number of patients with very complex transfusion needs, the researchers said.
Two people have so far been transfused with the lab-made red cells. They were closely monitored, and no untoward side effects were reported, they said.
The participants are well and healthy. The identities of the infused volunteers so far are not currently being revealed to help keep the trial “blind.”
The amount of lab-made cells being infused varies but is around 5–10 ml – about one to two teaspoons. Donors were recruited from a blood donor base.
They donated blood to the trial,, and stem cells were separated from their blood.
These stem cells were then made to produce red blood cells in a laboratory. The recipients of the blood were recruited from healthy people.
A minimum of 10 participants will receive two mini transfusions at least four months apart, one of the standard-donor red cells and one of the lab-made red cells, to find out if the young red blood cells made in the laboratory last longer than cells made in the body.
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