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Englisch 7:20 Science & Tech

Organs Have Blood Types and It's a Problem

SciShow · 81,063 Aufrufe · Hinzugefügt vor 1 Monat

Untertitel (135 Segmente)

00:00

Organ transplant waiting lists  are a race against the clock.

00:03

Patients on kidney transplant waitlists have

00:05

to hold out an average of more than three years.

00:08

On top of this, organ transplants  need the immune system’s

00:12

seal of approval to be accepted by the body,

00:15

and the immune system is extremely picky.

00:17

But for patients who need a kidney  ASAP, scientists might have found

00:21

a way to safely circumvent the  body’s overzealous security system.

00:25

And it’s by changing their blood type.

00:28

Yeah, kidneys have blood types.  Here’s how and why this might work.

00:34

[♪INTRO]

00:37

In 2019, 40% of end-stage kidney disease patients

00:40

died within three years of starting dialysis…

00:44

and only 11% could be added  to transplant waitlists.

00:47

Finding enough donor organs is complicated,

00:49

and supply and demand isn’t the only problem.

00:52

Doctors need to consider the possibility of

00:54

the immune system rejecting a transplant.

00:56

The immune system is like the body’s bouncers.

00:59

At its core is a type of cell called  a B cell, which generates antibodies.

01:03

These are highly specialized  proteins that can attach

01:06

to markers called antigens on  the surface of invading cells.

01:09

This helps the body distinguish  “non-self” from “self”, and take out,

01:13

say, a cold virus as soon as it  makes its way into your nose.

01:16

Once the antibodies grab onto an  invader, they can call in backup,

01:20

including other immune cells,  to take care of the intruder.

01:23

This system works across all  types of new biological material

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