SPEAKER_01 0:00

If you want to understand how human blood clots, um you really need to stop thinking like a chemist.

SPEAKER_00 0:07

Aaron Ross Powell Right. Yeah. You have to start thinking like a mechanical engineer.

SPEAKER_01 0:10

Aaron Ross Powell Exactly. And uh welcome to today's deep dive. We are exploring the mechanics of von Willebrand factor regulation.

SPEAKER_00 0:18

Aaron Ross Powell, which is you know drawing from this really brilliant framework by Dr. William Ayrt.

SPEAKER_01 0:22

Aaron Powell Yeah. The paper is incredible. Our mission today is to completely change how you, the listener, look at the blood flowing through your veins right now.

SPEAKER_00 0:30

Aaron Ross Powell Because I mean we usually think of biology as this orderly series of chemical switches, right? Like a lock and key.

SPEAKER_01 0:36

Right, exactly. But today, we're going to decode a highly sophisticated uh mechanical system. We're going to explore how size, physical force, and like molecular scissors keep you from bleeding to death.

SPEAKER_00 0:48

Aaron Powell Or, you know, on the flip side from clotting entirely.

SPEAKER_01 0:51

Trevor Burrus, Jr. Right. And to do that, we have to look closely at von Willebrand factor or uh VWF. For a long time, the medical world just asked a simple binary question about VWF. Like, is it there or is it not?

SPEAKER_00 1:03

Aaron Powell, which, as it turns out, is the completely wrong question.

SPEAKER_01 1:06

Trevor Burrus, Jr.: Right. Totally off base.

SPEAKER_00 1:07

Trevor Burrus, yeah. To understand VWS, we really have to look at its architecture and how it physically interacts with moving blood.

SPEAKER_01 1:15

Aaron Powell Because it's not just a simple uniform molecule floating around.

SPEAKER_00 1:19

Aaron Powell No, not at all. It circulates in your bloodstream as these massive linked chains called multimortars.

SPEAKER_01 1:25

Okay, multimars.

SPEAKER_00 1:26

Aaron Powell Yeah. And the largest of these, the high molecular weight or uh ultra-large multimorders, they're functionally distinct from the smaller ones.

SPEAKER_01 1:34

Aaron Powell Okay, let's unpack this a bit. Let's picture what's happening inside your own body right now. Your endothelial cells, they store this ultra-large VWF in these specialized compartments, right?

SPEAKER_00 1:45

Aaron Ross Powell They're called Weibel Pilade bodies.

SPEAKER_01 1:47

Trevor Burrus, Weibel Pilade bodies, got it. So when they release it, it emerges into your bloodstream as these incredibly long, highly adhesive strings.

SPEAKER_00 1:55

Aaron Powell Exactly. And because they are so large, they have significantly more binding sites to, you know, capture platelets.

SPEAKER_01 2:01

Aaron Powell So think about the blood rushing through your own arm. Imagine VWF is like a giant coiled up rope covered in grappling hooks.

SPEAKER_00 2:09

Aaron Powell I love that analogy. It's perfectly visual.

SPEAKER_01 2:12

Right. And if you just carry this coiled rope as you walk down the street, it's perfectly safe. The hooks are all tucked away inside the lubes.

SPEAKER_00 2:18

Yeah, they can't snag on anything.

SPEAKER_01 2:20

Exactly. In your body, this is what happens in slow-moving blood or uh low shear environments. The VWF stays tightly coiled up so it doesn't accidentally snag a passing platelet and cause a random clot.

SPEAKER_00 2:32

And that physical coiling, that is the hallmark of a true mechanosensor.

SPEAKER_01 2:37

Wait, a mechanosensor?

SPEAKER_00 2:38

Yeah. Meaning VWF is actively sensing the physical environment of your circulatory system.

SPEAKER_01 2:44

Oh wow.

SPEAKER_00 2:45

Because if that coiled rope with the hidden grappling hooks were fully adhesive all the time, I mean normal blood circulation would be impossible.

SPEAKER_01 2:52

You would just be a walking clot.

SPEAKER_00 2:53

Literally. Yeah. Yeah. But then consider what happens when you get a vascular injury. Your blood vessel constricts and the blood velocity just spikes.

SPEAKER_01 3:01

Aaron Powell So you basically drop that coiled rope into a violently rushing river.

SPEAKER_00 3:05

Aaron Powell Exactly. The sheer force of the water catches it and um pulls it and physically stretches it out.

SPEAKER_01 3:12

That high shear stress, that hydrodynamic tensile force physically elongates the VWF molecule. Aaron Powell Right.

SPEAKER_00 3:18

It unravels the rope and exposes all those hidden grappling hooks we talked about.

SPEAKER_01 3:21

Aaron Powell So that mechanical stretching exposes a very specific segment of the VWF molecule, right? The uh A1 domain.

SPEAKER_00 3:30

Yes, the A1 domain. And once that A1 domain is unfurled by the rushing blood, it is perfectly primed to bind to a specific receptor on your platelets.

SPEAKER_01 3:40

Which is known as platelet glycoprotein eBay, I believe.

SPEAKER_00 3:43

Spot on. So it literally snags the platelets, moving at high speed, to build a structural dam and stop the bleeding.

SPEAKER_01 3:49

That's just wild. The vital takeaway here is that the protein needs that physical mechanical force to actually activate.

SPEAKER_00 3:56

It absolutely needs it. Without the force, it's just a coiled rope.

SPEAKER_01 3:59

Okay, but here's where it gets really interesting. We have this beautifully designed system where physical force unravels VWF to catch platelets. Right. But once it's completely unwound and ultra-sticky catching everything in sight, it seems like a massive liability.

SPEAKER_00 4:13

Oh, it is. It's super dangerous.

SPEAKER_01 4:14

Right. If the rope is totally unschooled in your vessels and the hooks are out, how does your body stop it from going overboard and clotting the entire circulatory system?

SPEAKER_00 4:24

Well, you just hit on the core paradox of this entire system.

SPEAKER_01 4:27

The paradox.

SPEAKER_00 4:27

Yeah, the exact same hydrodynamic force that turns VWF on also makes it vulnerable to being turned down.

SPEAKER_01 4:33

Oh, I see. So the physical trigger acts as both the gas kettle and the brake.

SPEAKER_00 4:37

Exactly. If the tensile force is stretching the molecule to expose the A1 domain to catch platelets, it must be stretching other parts of the molecule too.

SPEAKER_01 4:45

Aaron Powell Makes sense. So what else is stretching?

SPEAKER_00 4:47

Aaron Powell Well, adjacent to the A1 domain is another section called the A2 domain.

SPEAKER_01 4:51

The A2 domain.

SPEAKER_00 4:52

Okay. Now most protein domains have structural reinforcements, like um like steel cross beams in a building that keep them folded tightly together under pressure. Trevor Burrus, Jr.

SPEAKER_01 5:03

Right. In biochemistry, those are often disulfide bonds. Yeah.

SPEAKER_00 5:06

Yes. But the A2 domain is specifically missing that reinforcement. It lacks a stabilizing disulfide bond.

SPEAKER_01 5:14

Really. So it's basically acting as a force-sensitive hinge.

SPEAKER_00 5:16

Exactly. It's structurally vulnerable by design.

SPEAKER_01 5:18

Aaron Powell Oh, wow. So when the molecule gets stretched by the rushing blood, that unreinforced A2 hinge just pops open.

SPEAKER_00 5:26

Aaron Powell It pops right open. And when A2 unfolds, it exposes a specific bond that is normally hidden deep inside the protein structure.

SPEAKER_01 5:34

Okay.

SPEAKER_00 5:35

And exposing that bond is essentially putting a giant cut here dotted line on the molecule.

SPEAKER_01 5:42

A cut here line, that's where the scissors come in.

SPEAKER_00 5:44

Exactly. Circulating your blood right alongside the VWF is an enzyme called ADMTS-13.

SPEAKER_01 5:52

Now, instead of viewing ADMTS-13 as a destroyer protein, it is much more accurate to view it as a size editor.

SPEAKER_00 5:58

A size editor is the perfect way to look at it.

SPEAKER_01 6:00

It's circulating through your vessels, looking for those exposed cut here dotted lines, and just giving the VWF a haircut.

SPEAKER_00 6:07

A very necessary haircut. It trims those dangerous, ultra-large strings into smaller, safer sizes that can circulate without causing random clots.

SPEAKER_01 6:16

The elegance of this feedback loop is profound when you think about it. The absolute largest strings of VWF experience the most physical drag and force from the blood flow.

SPEAKER_00 6:25

Right, because they have the most surface area.

SPEAKER_01 6:27

And because they experience the most force, their A2 domains are the most likely to be ripped open.

SPEAKER_00 6:32

Exactly. Therefore, the most dangerous, highly adhesive molecules in your body are the exact ones most likely to be exposed to at MTS-13 and trimmed down.

SPEAKER_01 6:42

It is pure homeostasis driven by physics.

SPEAKER_00 6:45

It really is. It's a self-regulating physical system.

SPEAKER_01 6:48

Okay, but that relies on the architecture being flawless, and you know, biology is messy.

SPEAKER_00 6:53

Very messy.

SPEAKER_01 6:54

Sometimes the genetic blueprint for this system has glitches. Let's look at what happens when the mechanics fail, starting with inherited conditions like von Willebrand disease or VWD. Trevor Burrus, Jr.

SPEAKER_00 7:05

Right. Let's look at type 2A VWD. It presents a really clear structural failure.

SPEAKER_01 7:09

Aaron Powell Because the patient completely loses those vital high molecular weight multifomers, right? The big grappling hook ropes are just absent from their blood.

SPEAKER_00 7:18

Exactly. And the absence of those large multimers in type 2A, well, it can stem from a few different assembly issues.

SPEAKER_01 7:24

But the most illustrative one relates directly to that A2 hinge we just discussed.

SPEAKER_00 7:27

Yes. Some patients inherit a mutation that further destabilizes the A2 domain.

SPEAKER_01 7:32

Oh, so it makes the hinge far too floppy.

SPEAKER_00 7:34

Way too floppy. So the physical threshold required to pop it open drops significantly.

SPEAKER_01 7:38

I see. Even normal, everyday blood flow without a vascular injury is enough to unfold the A2 domain and expose that cut here line.

SPEAKER_00 7:48

Exactly. The Adam Keys 13 scissors get to work too early and too often.

SPEAKER_01 7:52

So they constantly trim the VWF into tiny pieces before it ever has a chance to build a clot.

SPEAKER_00 7:58

Right. And the clinical result for the patient is a severe bleeding phenotype. They simply don't have the large multimers needed to catch platelets under high shear force.

SPEAKER_01 8:07

Now type 2B VWD presents a scenario that seems completely backward to me.

SPEAKER_00 8:12

It is super counterintuitive.

SPEAKER_01 8:14

Right. Because in type 2B, the genetic defect actually increases VWF's affinity for the platelet receptor. The grappling hooks are stickier than normal.

SPEAKER_00 8:24

They are very sticky.

SPEAKER_01 8:25

My immediate assumption is that if VWF binds too well to platelets, the patient would suffer from massive blood clots, not bleeding.

SPEAKER_00 8:32

Yeah. That's what everyone thinks at first. But it's a mechanism called hyperadhesion. Hyperadhesion. Because the VWF binds so aggressively to the platelets, they don't wait for an injury site or high shear stress.

SPEAKER_01 8:43

Oh, they just start sticking together immediately.

SPEAKER_00 8:45

Right. They form large clumps prematurely, right in the middle of normal circulation.

SPEAKER_01 8:52

That sounds bad.

SPEAKER_00 8:53

It is. And your body's cellular clearance systems are highly tuned to detect anomalies like that. Macrophages in the liver and spleen recognize these premature clumps and flag them for immediate destruction.

SPEAKER_01 9:06

So the body rapidly sweeps them out of circulation.

SPEAKER_00 9:09

Exactly. By trying to clean up what it perceives as a mess, the body accidentally clears out all the most hemostatically effective VWF multimers.

SPEAKER_01 9:19

And a huge portion of your circulating platelets along with it.

SPEAKER_00 9:22

Right. So you end up with a massive shortage of both functional VWF and platelets.

SPEAKER_01 9:26

Wow. So the underlying mechanism is hyperadhesion, but the actual symptom the patient experiences bleeding.

SPEAKER_00 9:33

Yeah. It is a brilliant, though unfortunate, physiological irony.

SPEAKER_01 9:36

That's wild. But what if the size and the force mechanics are working fine? Like the size and force axis isn't the entire story of VWF, right?

SPEAKER_00 9:43

No, not at all. We also have type 2M and 2N, which pivot away from mechanical failure into interaction failure.

SPEAKER_01 9:50

Interaction failure. So it's about what it binds to.

SPEAKER_00 9:53

Exactly. We have to remember that VWF doesn't just respond to force, it has to physically lock onto other structures. Type 2M is a perfect example of this.

SPEAKER_01 10:02

In type 2M, the ADMTS-13 trimming works perfectly, and the multi-semers are the correct normal size, right?

SPEAKER_00 10:10

Right. But a mutation in the protein changes the shape of the binding sites.

SPEAKER_01 10:15

Aaron Powell So keeping with our analogy, the ropes are the right length, but the grappling hooks are dull.

SPEAKER_00 10:20

Trevor Burrus That's exactly it. They just can't snag the platelets effectively.

SPEAKER_01 10:23

And what about type 2N?

SPEAKER_00 10:25

Well, type 2N acts orthogonally to the platelet system altogether.

SPEAKER_01 10:28

Aaron Powell orthogonally, meaning it's a completely different axis.

SPEAKER_00 10:31

Aaron Powell Yeah, because VWF actually has a dual role in your blood. Besides catching platelets, it acts as a protective carrier ship for another crucial clotting protein called factor 8.

SPEAKER_01 10:40

Factor eighth, right.

SPEAKER_00 10:41

And factor eighth is highly unstable on its own. It will degrade rapidly if it isn't bound to VWF.

SPEAKER_01 10:46

Oh, I see. So in type 2N, the VWF loses its ability to carry factor eight.

SPEAKER_00 10:50

Right. The platelets are fine, the force mechanics are fine, but because factor eighth is left unprotected and degrades, the patient develops a bleeding pattern.

SPEAKER_01 10:59

A pattern that looks almost identical to hemophilia A, right?

SPEAKER_00 11:03

Very similar, yeah. It highlights how multifunctional this single protein is. I mean, it is a mechanosensor, a structural dam, and a protective transport vehicle all at once.

SPEAKER_01 11:13

It's incredible. So the genetic code can break the system in multiple ways, but sometimes a person's DNA is flawless.

SPEAKER_00 11:21

Absolutely flawless.

SPEAKER_01 11:22

They make perfectly structured VWF, perfect A2 hinges, perfect A dam TS13 scissors, yet they still develop a severe bleeding disorder.

SPEAKER_00 11:32

Yeah, and this is where it gets into flow dynamics.

SPEAKER_01 11:34

Because the physical environment, like the actual plunning of the body, destroys the VWF.

SPEAKER_00 11:38

Exactly. This brings us to acquired von Willebrand syndrome and a fascinating clinical scenario known as HAID syndrome.

SPEAKER_01 11:45

Okay, HADE syndrome. Let's look at the case from the source. Consider a 78-year-old patient who comes into the hospital with recurrent, severe bleeding in his gastrointestinal tract. He's bleeding from fragile blood vessels in his gut.

SPEAKER_00 11:58

Right. Now, when doctors run standard lab tests to look at the sheer quantity of VWF in his blood, his VWF antigen levels, everything looks totally normal.

SPEAKER_01 12:08

So he has plenty of the protein.

SPEAKER_00 12:10

Yes. But a deeper structural analysis reveals he is completely missing the high molecular weight multifirmers. The large ropes are gone.

SPEAKER_01 12:19

The ropes are gone, so where did they go?

SPEAKER_00 12:21

Well, the key to solving this diagnostic mystery lies entirely outside the bloodstream in the heart.

SPEAKER_01 12:27

Wait, the heart. But he's bleeding in his gut.

SPEAKER_00 12:29

Right. But this patient has severe aortic stenosis. One of the main valves in his heart has become calcified, stiff, and incredibly narrowed.

SPEAKER_01 12:39

Okay, let's put the fluid dynamics together here. We established that VWF unravels and gets trimmed when it experiences high shear force. Yes. His heart is pumping a normal volume of blood, but that blood now has to squeeze through this tiny, narrowed, calcified valve.

SPEAKER_00 12:53

Exactly. Think about putting your thumb over the end of a running garden hose.

SPEAKER_01 12:57

Oh, yeah. The water velocity accelerates dramatically.

SPEAKER_00 13:00

The blood jetting through that narrowed heart valves reaches extreme velocities. This creates massive, non-physiologic, mechanical shear forces.

SPEAKER_01 13:09

So those massive forces violently rip open the A2 domains on every single piece of large VWF that passes through the heart.

SPEAKER_00 13:17

Right. And the 8 MTS-13 scissors are just doing their assigned job. They encounter an endless stream of unfolded A2 domains and they go to town.

SPEAKER_01 13:25

They constantly trim the VWF.

SPEAKER_00 13:28

Yeah. By the time the blood leaves the heart and travels down to his gut, all the large, useful multi-markners have been chopped into useless fragments.

SPEAKER_01 13:35

That is wild. Now, if he's bleeding because he lacks the large multimurmors, my first instinct as a doctor would be to just give him an IV infusion of concentrated VWF. Just replace what's missing.

SPEAKER_00 13:47

Sure. It's the most intuitive solution. But if we connect this to the bigger picture, what happens to that pristine concentrated IV VWF the second it circulates back through the heart?

SPEAKER_01 13:57

Oh, I see. It hits the narrowed valve, the velocity spikes, and the new VWF gets shredded instantly.

SPEAKER_00 14:02

Instantly. It takes mere minutes for the narrowed valve to destroy the replacement VWF. Intravenous replacement is fighting a losing battle against physics.

SPEAKER_01 14:11

So to treat the bleeding, the clinician must treat the physical force.

SPEAKER_00 14:15

You have to fix the plumbing. If a cardiac surgeon replaces that narrowed aortic valve, the blood flow returns to normal, the extreme shear stress disappears, the A2 domains stay safely tucked away, and the patient's bleeding disorder completely resolves.

SPEAKER_01 14:30

To treat the bleeding, you must treat the force. I love that. And that principle extends to modern medical technology as well, right? Specifically with LVAD's left ventricular assist devices.

SPEAKER_00 14:41

Yeah, LVADs, these are mechanical heart pumps implanted in patients with severe heart failure.

SPEAKER_01 14:47

They're life-saving devices, obviously.

SPEAKER_00 14:48

Absolutely life-saving. But they introduce a profound medical paradox. The continuous slow rotors inside these pumps spin at incredibly high speeds to push blood through the body.

SPEAKER_01 14:58

And those spinning rotors create the exact same massive shear forces as the narrowed heart valve.

SPEAKER_00 15:04

Exactly. They physically shred the VWF, giving these heart failure patients an acquired bleeding disorder. Flow literally creates the disease.

SPEAKER_01 15:12

Wow. It forces doctors to navigate a razor-thin clinical margin.

SPEAKER_00 15:17

It really does. They have a device keeping the patient alive, but the mechanical nature of that device actively dismantles the patient's hemostatic system.

SPEAKER_01 15:25

It's a perfect illustration of how deeply biology is subordinate to physics.

SPEAKER_00 15:30

Very well said.

SPEAKER_01 15:31

Okay, so we've spent a lot of time analyzing what happens when VWF gets trimmed too much, whether by floppy genetic hinges or aggressive physical plumbing. Let's look at the dark opposite.

SPEAKER_00 15:40

The other end of the spectrum.

SPEAKER_01 15:41

Yeah. What happens if the trimming stops entirely?

SPEAKER_00 15:44

Oh, this takes us to the extreme thrombotic edge of the mechanical axis, a condition known as TTP or thrombotic uh thrombocytopenic purpura.

SPEAKER_01 15:53

TTP. Okay. In TTP, the VWF is structurally sound, the plumbing is fine, but the EdMTS-13 scissors are missing or disabled, right?

SPEAKER_00 16:01

Right. Often the patient's own immune system produces autoantibodies that neutralize the EdMTS-13 enzyme.

SPEAKER_01 16:08

So they have no molecular scissors?

SPEAKER_00 16:10

None. Remember that your endothelial cells are constantly releasing those ultra-large, highly adhesive VWF strings into the bloodstream.

SPEAKER_01 16:19

And in a healthy body, 8 MTS-13 trims them immediately.

SPEAKER_00 16:23

But in TTP, without those scissors, these massive grappling hook ropes are left completely unregulated in the circulation.

SPEAKER_01 16:31

They never get edited down, they just catch passing platelets constantly, everywhere they go.

SPEAKER_00 16:35

Yeah, and the result is catastrophic. You see massive, unregulated, platelet-rich microvascular thrombosis.

SPEAKER_01 16:41

Meaning tiny clots everywhere.

SPEAKER_00 16:43

Everywhere. Thousands of microscopic blood clots form simultaneously in the small blood vessels across the body, critically damaging the brain, the kidneys, and the heart.

SPEAKER_01 16:52

That is terrifying.

SPEAKER_00 16:53

It is. TDP isn't just a generic clotting disorder, it is the devastating clinical consequence of failing to restrain a mechanically activated adhesive protein.

SPEAKER_01 17:02

Which brings up a really crucial practical problem for the doctors trying to diagnose any of these conditions. We've talked extensively about how dynamic the system is. It relies on rushing blood, elongational flow, extreme sheer gradients.

SPEAKER_00 17:15

Yeah, lots of moving parts.

SPEAKER_01 17:17

But a laboratory test is essentially blood sitting perfectly still in a plastic tube.

SPEAKER_00 17:22

And that is a monumental challenge in diagnostics. We are trying to translate intensely force-dependent biology into static laboratory values.

SPEAKER_01 17:31

Right. A standard VWF antigen test simply measures the quantity of protein in the tube.

SPEAKER_00 17:37

Aaron Powell Exactly. Just the raw amount.

SPEAKER_01 17:39

Aaron Powell Going back to our Hayes syndrome patient with the bad heart valve, we saw that you can have a totally normal amount of protein in the blood, but it's all chopped up and non-functional. Yep. So trying to understand VWF function by just measuring its concentration in a static test tube is like um like trying to understand how a parachute works by exclusively looking at it tightly packed inside a canvas backpack. I like that. You can weigh the backpack, you can verify the parachute is in there, that's your antigen test, but you have absolutely no idea if the cords are tangled or if there's a hole in the silk.

SPEAKER_00 18:12

Right.

SPEAKER_01 18:12

Or most importantly, if it will actually catch the wind and deploy when you jump out of the plane.

SPEAKER_00 18:17

Exactly. By testing it statically, you are completely removing the sheer force it was designed for. That analogy captures the diagnostic limitation perfectly.

SPEAKER_01 18:28

Because you're missing the dynamic environment.

SPEAKER_00 18:30

You are entirely missing it. Standard labs simply cannot reproduce the complex flow conditions, the varying shear gradients, and the physical stresses of an actual human blood vessel.

SPEAKER_01 18:40

So they are only ever partial approximations.

SPEAKER_00 18:43

Exactly.

SPEAKER_01 18:43

So how do doctors navigate this? How do they diagnose these incredibly complex structural problems using static tools?

SPEAKER_00 18:51

Well, the diagnostic guidelines require clinicians to act as analytical detectives. They have to read ratios as structure-function clues.

SPEAKER_01 18:59

Read ratios. What does that mean in practice?

SPEAKER_00 19:01

They measure the antigen quantity, but then they compare it to functional assays like platelet-dependent activity or collagen binding tests.

SPEAKER_01 19:08

Oh, I see.

SPEAKER_00 19:09

If the total quantity of the protein is high, but the functional activity is exceptionally low, that ratio tells the doctor the parachute is in the backpack, but it's fundamentally broken.

SPEAKER_01 19:19

That makes sense. So assessing function requires integrating concentration, size, physical force, and cleavage, all interpreted within the clinical context of that specific patient.

SPEAKER_00 19:29

Exactly. It's a holistic view.

SPEAKER_01 19:31

It is an incredibly elegant yet precarious high wire balancing act. Let's synthesize the journey we've been on today. We started with the assumption that blood clotting is just an orderly chemical switch.

SPEAKER_00 19:44

And we proved that wrong.

SPEAKER_01 19:45

We did. We've seen that von Willebrand factor is actually a highly sophisticated mechanosensor. Hemostasis relies on the largest multimermers stretching out under the physical force of flowing blood to catch platelets and build a dam.

SPEAKER_00 19:59

While simultaneously, you have the AdMTS13 scissors meticulously editing them down the moment they unfold.

SPEAKER_01 20:06

Ensuring those grappling hooks don't accidentally block the highway and cause a stroke.

SPEAKER_00 20:10

The overarching takeaway is that you cannot separate the biology from the physics.

SPEAKER_01 20:14

You really can't.

SPEAKER_00 20:14

The treatment logic for all these distinct diseases is entirely based on this mechanical axis.

SPEAKER_01 20:19

Whether a doctor is using medication to force endothelial cells to release their endogenous stores of large multi-mirrors.

SPEAKER_00 20:26

Or a cardiac surgeon is replacing a stiff heart valve to eliminate sheer force.

SPEAKER_01 20:31

Or a hematologist is utilizing plasma exchange to restore at MTS-13 activity in a TTP patient.

SPEAKER_00 20:39

Exactly. They are all manipulating the exact same physical forces to cure the disease.

SPEAKER_01 20:43

We think of ourselves as these fleshy biological creatures, but we are absolutely governed by the raw, unyielding laws of physics.

SPEAKER_00 20:52

We really are.

SPEAKER_01 20:52

Which leaves us with something I want you to mull over as we wrap up today's deep dive.

SPEAKER_00 20:57

I'm ready for it.

SPEAKER_01 20:58

If your body utilizes the physical, mechanical force of rushing blood to unfold, activate, and regulate vital, life-saving proteins like VWF, what other microscopic systems in your body are secretly acting as mechanical sensors?

SPEAKER_00 21:14

Oh, that's a good question.

SPEAKER_01 21:15

What other vital molecules are sitting completely dormant inside you right now, just waiting for the right physical push, the right stretch, or the right environmental pressure to spring to life?

SPEAKER_00 21:24

Gives you a lot to think about.

SPEAKER_01 21:25

It really does. Thank you so much for joining us on this deep dive. We'll catch you next time.