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Angoose
31 May 20 21:03
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Date Joined: 18 Jul 02
| Topic/replies: 24,312 | Blogger: Angoose's blog
Coronavirus May Be a Blood Vessel Disease, Which Explains Everything
Many of the infection’s bizarre symptoms have one thing in common
https://elemental.medium.com/coronavirus-may-be-a-blood-vessel-disease-which-explains-everything-2c4032481ab2

In April, blood clots emerged as one of the many mysterious symptoms attributed to Covid-19, a disease that had initially been thought to largely affect the lungs in the form of pneumonia. Quickly after came reports of young people dying due to coronavirus-related strokes. Next it was Covid toes — painful red or purple digits.

What do all of these symptoms have in common? An impairment in blood circulation. Add in the fact that 40% of deaths from Covid-19 are related to cardiovascular complications, and the disease starts to look like a vascular infection instead of a purely respiratory one.

Months into the pandemic, there is now a growing body of evidence to support the theory that the novel coronavirus can infect blood vessels, which could explain not only the high prevalence of blood clots, strokes, and heart attacks, but also provide an answer for the diverse set of head-to-toe symptoms that have emerged.

“All these Covid-associated complications were a mystery. We see blood clotting, we see kidney damage, we see inflammation of the heart, we see stroke, we see encephalitis [swelling of the brain],” says William Li, MD, president of the Angiogenesis Foundation. “A whole myriad of seemingly unconnected phenomena that you do not normally see with SARS or H1N1 or, frankly, most infectious diseases.”

“If you start to put all of the data together that’s emerging, it turns out that this virus is probably a vasculotropic virus, meaning that it affects the [blood vessels],” says Mandeep Mehra, MD, medical director of the Brigham and Women’s Hospital Heart and Vascular Center.

In a paper published in April in the scientific journal The Lancet, Mehra and a team of scientists discovered that the SARS-CoV-2 virus can infect the endothelial cells that line the inside of blood vessels. Endothelial cells protect the cardiovascular system, and they release proteins that influence everything from blood clotting to the immune response. In the paper, the scientists showed damage to endothelial cells in the lungs, heart, kidneys, liver, and intestines in people with Covid-19.

“The concept that’s emerging is that this is not a respiratory illness alone, this is a respiratory illness to start with, but it is actually a vascular illness that kills people through its involvement of the vasculature,” says Mehra.

A one-of-a-kind respiratory virus
SARS-CoV-2 is thought to enter the body through ACE2 receptors present on the surface of cells that line the respiratory tract in the nose and throat. Once in the lungs, the virus appears to move from the alveoli, the air sacs in the lung, into the blood vessels, which are also rich in ACE2 receptors.

“[The virus] enters the lung, it destroys the lung tissue, and people start coughing. The destruction of the lung tissue breaks open some blood vessels,” Mehra explains. “Then it starts to infect endothelial cell after endothelial cell, creates a local immune response, and inflames the endothelium.”

A respiratory virus infecting blood cells and circulating through the body is virtually unheard of. Influenza viruses like H1N1 are not known to do this, and the original SARS virus, a sister coronavirus to the current infection, did not spread past the lung. Other types of viruses, such as Ebola or Dengue, can damage endothelial cells, but they are very different from viruses that typically infect the lungs.

Benhur Lee, MD, a professor of microbiology at the Icahn School of Medicine at Mount Sinai, says the difference between SARS and SARS-CoV-2 likely stems from an extra protein each of the viruses requires to activate and spread. Although both viruses dock onto cells through ACE2 receptors, another protein is needed to crack open the virus so its genetic material can get into the infected cell. The additional protein the original SARS virus requires is only present in lung tissue, but the protein for SARS-CoV-2 to activate is present in all cells, especially endothelial cells.

“In SARS1, the protein that’s required to cleave it is likely present only in the lung environment, so that’s where it can replicate. To my knowledge, it doesn’t really go systemic,” Lee says. “[SARS-CoV-2] is cleaved by a protein called furin, and that’s a big danger because furin is present in all our cells, it’s ubiquitous.”

Endothelial damage could explain the virus’ weird symptoms
An infection of the blood vessels would explain many of the weird tendencies of the novel coronavirus, like the high rates of blood clots. Endothelial cells help regulate clot formation by sending out proteins that turn the coagulation system on or off. The cells also help ensure that blood flows smoothly and doesn’t get caught on any rough edges on the blood vessel walls.

“The endothelial cell layer is in part responsible for [clot] regulation, it inhibits clot formation through a variety of ways,” says Sanjum Sethi, MD, MPH, an interventional cardiologist at Columbia University Irving Medical Center. “If that’s disrupted, you could see why that may potentially promote clot formation.”

Endothelial damage might account for the high rates of cardiovascular damage and seemingly spontaneous heart attacks in people with Covid-19, too. Damage to endothelial cells causes inflammation in the blood vessels, and that can cause any plaque that’s accumulated to rupture, causing a heart attack. This means anyone who has plaque in their blood vessels that might normally have remained stable or been controlled with medication is suddenly at a much higher risk for a heart attack.

“Inflammation and endothelial dysfunction promote plaque rupture,” Sethi says. “Endothelial dysfunction is linked towards worse heart outcomes, in particular myocardial infarction or heart attack.”

Blood vessel damage could also explain why people with pre-existing conditions like high blood pressure, high cholesterol, diabetes, and heart disease are at a higher risk for severe complications from a virus that’s supposed to just infect the lungs. All of those diseases cause endothelial cell dysfunction, and the additional damage and inflammation in the blood vessels caused by the infection could push them over the edge and cause serious problems.

The theory could even solve the mystery of why ventilation often isn’t enough to help many Covid-19 patients breathe better. Moving air into the lungs, which ventilators help with, is only one part of the equation. The exchange of oxygen and carbon dioxide in the blood is just as important to provide the rest of the body with oxygen, and that process relies on functioning blood vessels in the lungs.

“If you have blood clots within the blood vessels that are required for complete oxygen exchange, even if you’re moving air in and out of the airways, [if] the circulation is blocked, the full benefits of mechanical ventilatory support are somewhat thwarted,” says Li.

A new paper published last week in the New England Journal of Medicine, on which Li is a co-author, found widespread evidence of blood clots and infection in the endothelial cells in the lungs of people who died from Covid-19. This was in stark contrast to people who died from H1N1, who had nine times fewer blood clots in the lungs. Even the structure of the blood vessels was different in the Covid-19 lungs, with many more new branches that likely formed after the original blood vessels were damaged.

“We saw blood clots everywhere,” Li says. “We were observing virus particles filling up the endothelial cell like filling up a gumball machine. The endothelial cell swells and the cell membrane starts to break down, and now you have a layer of injured endothelium.”

Finally, infection of the blood vessels may be how the virus travels through the body and infects other organs — something that’s atypical of respiratory infections.

“Endothelial cells connect the entire circulation [system], 60,000 miles worth of blood vessels throughout our body,” says Li. “Is this one way that Covid-19 can impact the brain, the heart, the Covid toe? Does SARS-CoV-2 traffic itself through the endothelial cells or get into the bloodstream this way? We don’t know the answer to that.”

If Covid-19 is a vascular disease, the best antiviral therapy might not be antiviral therapy
An alternative theory is that the blood clotting and symptoms in other organs are caused by inflammation in the body due to an over-reactive immune response — the so-called cytokine storm. This inflammatory reaction can occur in other respiratory illnesses and severe cases of pneumonia, which is why the initial reports of blood clots, heart complications, and neurological symptoms didn’t sound the alarm bells. However, the magnitude of the problems seen with Covid-19 appear to go beyond the inflammation experienced in other respiratory infections.

“There is some increased propensity, we think, of clotting happening with these [other] viruses. I think inflammation in general promotes that,” Sethi says. “Is this over and above or unique for SARS-CoV-2, or is that just because [the infection] is just that much more severe? I think those are all really good questions that unfortunately we don’t have the answer to yet.”

Anecdotally, Sethi says the number of requests he received as the director of the pulmonary embolism response team, which deals with blood clots in the lungs, in April 2020 was two to three times the number in April 2019. The question he’s now trying to answer is whether that’s because there were simply more patients at the hospital during that month, the peak of the pandemic, or if Covid-19 patients really do have a higher risk for blood clots.

“I suspect from what we see and what our preliminary data show is that this virus has an additional risk factor for blood clots, but I can’t prove that yet,” Sethi says.

The good news is that if Covid-19 is a vascular disease, there are existing drugs that can help protect against endothelial cell damage. In another New England Journal of Medicine paper that looked at nearly 9,000 people with Covid-19, Mehra showed that the use of statins and ACE inhibitors were linked to higher rates of survival. Statins reduce the risk of heart attacks not only by lowering cholesterol or preventing plaque, they also stabilize existing plaque, meaning they’re less likely to rupture if someone is on the drugs.

“It turns out that both statins and ACE inhibitors are extremely protective on vascular dysfunction,” Mehra says. “Most of their benefit in the continuum of cardiovascular illness — be it high blood pressure, be it stroke, be it heart attack, be it arrhythmia, be it heart failure — in any situation the mechanism by which they protect the cardiovascular system starts with their ability to stabilize the endothelial cells.”

Mehra continues, “What we’re saying is that maybe the best antiviral therapy is not actually an antiviral therapy. The best therapy might actually be a drug that stabilizes the vascular endothelial. We’re building a drastically different concept.”
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Report Angoose May 31, 2020 9:04 PM BST
So many theories, so much remains unknown.
Report Angoose May 31, 2020 9:12 PM BST
New coronavirus losing potency, top Italian doctor says
https://www.reuters.com/article/us-health-coronavirus-italy-virus-idUSKBN2370OQ?taid=5ed3fd86710ac20001b0d575&utm_campaign=trueAnthem%3A+Trending+Content&utm_medium=trueAnthem&utm_source=twitter

ROME (Reuters) - The new coronavirus is losing its potency and has become much less lethal, a senior Italian doctor said on Sunday.

“In reality, the virus clinically no longer exists in Italy,” said Alberto Zangrillo, the head of the San Raffaele Hospital in Milan in the northern region of Lombardy, which has borne the brunt of Italy’s coronavirus contagion.

“The swabs that were performed over the last 10 days showed a viral load in quantitative terms that was absolutely infinitesimal compared to the ones carried out a month or two months ago,” he told RAI television.

Italy has the third highest death toll in the world from COVID-19, with 33,415 people dying since the outbreak came to light on Feb. 21. It has the sixth highest global tally of cases at 233,019.

However new infections and fatalities have fallen steadily in May and the country is unwinding some of the most rigid lockdown restrictions introduced anywhere on the continent.

Zangrillo said some experts were too alarmist about the prospect of a second wave of infections and politicians needed to take into account the new reality.

“We’ve got to get back to being a normal country,” he said. “Someone has to take responsibility for terrorizing the country.”

The government urged caution, saying it was far too soon to claim victory.

“Pending scientific evidence to support the thesis that the virus has disappeared ... I would invite those who say they are sure of it not to confuse Italians,” Sandra Zampa, an undersecretary at the health ministry, said in a statement.

“We should instead invite Italians to maintain the maximum caution, maintain physical distancing, avoid large groups, to frequently wash their hands and to wear masks.”

A second doctor from northern Italy told the national ANSA news agency that he was also seeing the coronavirus weaken.

“The strength the virus had two months ago is not the same strength it has today,” said Matteo Bassetti, head of the infectious diseases clinic at the San Martino hospital in the city of Genoa.

“It is clear that today the COVID-19 disease is different.”
Report DenzilPenberthy May 31, 2020 9:20 PM BST
Angoose I didn't think you were a conspiracy theorist loon nut job
Report DenzilPenberthy May 31, 2020 9:22 PM BST
Why is this theory against the official narrative allowed and others not?
Report Angoose May 31, 2020 9:25 PM BST
You'll need to help me out, I'm struggling to see any conspiracy theory signals in those two articles.
Report DenzilPenberthy May 31, 2020 9:31 PM BST
It's been supposed to be a respiratory illness a coronavirus affecting the lungs,your title says blood vessel disease
Report Angoose May 31, 2020 9:42 PM BST
The article suggests it’s a bit of both.
I’d read earlier reports of doctors being surprised by what they were seeing in regards to blood clotting and this is further evidence.
Report Ibrahima Sonko May 31, 2020 9:43 PM BST
It thickens blood in already sick people.
Report DenzilPenberthy May 31, 2020 9:45 PM BST
They are describing more symptoms,the reports from doctors of this being not like regular coronaviruses with lung damage that some hadn't seen before were shut down immediatley and removed from social platforms.
Report DenzilPenberthy May 31, 2020 9:47 PM BST
*immediately*
My point isn't against what's being said it's highlighting the censorship that has taken place on anything that contradicted the official narratives
Report SontaranStratagem May 31, 2020 9:50 PM BST
Utter pish take now sadly

They've changed the game so many times its painfully obvious they are just muddying the waters to get people's attention away from it
Report Angoose May 31, 2020 9:50 PM BST
One thing that is clear is that there remains more that is not known about this virus than is known.
Report DenzilPenberthy May 31, 2020 9:52 PM BST

May 31, 2020 -- 9:50PM, SontaranStratagem wrote:


Utter pish take now sadly They've changed the game so many times its painfully obvious they are just muddying the waters to get people's attention away from it


Agree 100%

Report Ibrahima Sonko May 31, 2020 9:53 PM BST
That is not true, it has an 80% similarity to 2003 covid 1 virus, its the last 20% they cant work out and remember 17 years since covid 1 they have not made a vaccine for it.
Report lapsy pa May 31, 2020 9:54 PM BST
Be great if it is true that it is starting to weaken.
Report Ibrahima Sonko May 31, 2020 9:56 PM BST
It is gone, it has a 4 week peek and doesnt perform well in warm temperatures. Thank may for being so hot.
Report wondersobright May 31, 2020 9:58 PM BST
They've changed the game so many times its painfully obvious they are just muddying the waters to get people's attention away from it

correct
Report SontaranStratagem May 31, 2020 9:58 PM BST

May 31, 2020 -- 9:56PM, Ibrahima Sonko wrote:


It is gone, it has a 4 week peek and doesnt perform well in warm temperatures. Thank may for being so hot.


Our bodies on the other hand love the heat and perform better Wink

Report Ibrahima Sonko May 31, 2020 10:01 PM BST
And getting outside getting some of that vitamin D, locking people up goes against everything already proven.
Report wondersobright May 31, 2020 10:02 PM BST
^also correct
Report workrider May 31, 2020 10:06 PM BST
I said I wouldn't say anything about my situation re Covid19 but here goes, I was admitted to hospital 8 weeks ago with this disease, difficulty breathing was the start of it, i was isolated in hospital Pneumonia was diagnosed , I had been on antibiotics for nearly a month , including steroids , I had several chest xray s which all came back negative . I had been coughing for months, while in hospital they did a scan only to discover I had 2 blood clots in my lungs , and two broken ribs from coughing. Thankfully I am now on the road to full recovery , but I have to take blood thinning tablets for 3 months . I never took as much as a lem sip before this happened to me, so I had no underlining ailments. Having read the above statement I can see where they are coming from...
Report DenzilPenberthy May 31, 2020 10:14 PM BST
Interesting post workrider sounds like you've had a hell of a time

I hadn't realised how common these type of symptoms are in flu like illnesses

Can the flu cause blood clots?

The body's under a lot of stress during a bout of flu, doctors say. Inflammation is up and oxygen levels and blood pressure can drop. These changes can lead to an increased risk of forming blood clots in the vessels that serve the heart.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2104525/
Report Ibrahima Sonko May 31, 2020 10:14 PM BST
Glad you are on the road to recovery workrider.
Report InsiderTrader May 31, 2020 10:15 PM BST
'Zangrillo said some experts were too alarmist about the prospect of a second wave of infections and politicians needed to take into account the new reality.

“We’ve got to get back to being a normal country,” he said. “Someone has to take responsibility for terrorizing the country.” '


Interesting point by you there Angoose.

I hope you are right. My wife wants to go for walk tomorrow... first time out of the house since coming out Hospital following heart surgery on March 13th.
Report sofiakenny May 31, 2020 10:18 PM BST
workrider..bloody hell that sounds rough pal..hopefully a few winners will speed your recovery.
Report SontaranStratagem May 31, 2020 10:22 PM BST
Hope your well workrider

We can fall ill at any moment, even the super fit
Report workrider May 31, 2020 10:24 PM BST
Thanks lads for your kind words, a scary time I can tell you , there were 4 of us in the isolation ward and 3 of us got out alive including a 84 year old Spanish lady, sadly I'm not sure about the last one, though she was getting worse the day i was discharged . I really think Governments should be highlighting the people like us who made it, we here in Ireland seem to be getting a handle on it.hopefully the U.K. starts to pull through quickly.
Report maleuk01. May 31, 2020 10:35 PM BST
Covid 19 has a higher death rate amongst people with A type blood, and lower in O type so  i understand.

So could be blood related as well as resipitary
Report macarony May 31, 2020 10:36 PM BST
I don't know anyone that died of this virus I know lots people that were very old or had been at deaths door who's death was put down to this virus. I myself have been at work went shopping often several times a day visited family and friends yet was tested negative last week my wife works in carehome lastweek a resident died of Leukemia had a few near misses over the last 12 months guess what was put down as the cause of death?
Report Angoose May 31, 2020 10:37 PM BST
Average temperature in Rio during March is 30C.
Report Ibrahima Sonko May 31, 2020 10:40 PM BST
And ?

Since you know everything angoose, would like a wager on the end result in Brazil ?
Report Angoose May 31, 2020 10:49 PM BST
Why does a simple weather based fact appear to antagonise you ?
Report Ibrahima Sonko May 31, 2020 10:56 PM BST
Its more to do with a country coming out of winter to spring and nearly summer.

Would you like to put your money where your mouth is ?

Since you know everything, worldwide.
Report Angoose May 31, 2020 11:01 PM BST
I’ve never claimed to know everything about anything.
I simply posted a readily available average daily high temperature for the month in one city and you get upset.

I really don’t know why this would upset anyone quite so much.
Possibly you are reading much more in to that post than there is, then again it may be something else, I don’t know.
Report Dotchinite May 31, 2020 11:03 PM BST
Its certainly true that a side effect of lockdown would be lower vitamin D levels in the population and therefore higher death rates.
Report Ibrahima Sonko May 31, 2020 11:17 PM BST
I am not upset, just angry about liars

I want to have a bet with you, old betfair style.....

I am fed up with posters who cannot back up views.
Report Angoose May 31, 2020 11:19 PM BST
Ok, give me a price for the average daily high temperature in Rio for the month of May.
Report Angoose May 31, 2020 11:20 PM BST
I’ll go for 30 degrees centigrade.
Report Ibrahima Sonko May 31, 2020 11:25 PM BST
Who cares about temperature, stop being a dick ffs.

Tell me the numbers of deaths you already know want or predict.

I want to bet with you, even though its in bad taste but you are needed to be called out for what you are.

Put a number as you know everything. Brazil.
Report Baphornet May 31, 2020 11:26 PM BST
i agree about the seaonal changes; it's no good quoting countries that do not really have a winter, as the media did in the early days
Report Angoose May 31, 2020 11:37 PM BST

May 31, 2020 -- 11:25PM, Ibrahima Sonko wrote:


Who cares about temperature, stop being a dick ffs.Tell me the numbers of deaths you already know want or predict.I want to bet with you, even though its in bad taste but you are needed to be called out for what you are.Put a number as you know everything. Brazil.


Your posts have become increasingly angry in response to a very simple one line post of mine.
You have chosen to respond in the way that you did, quite why I really don’t know.

As you yourself have stated, betting on the number of reported people to die from a virus would be in very bad taste.
If you would like to pick a more savoury betting medium, I would have no problem in making a wager with you, the proceeds to go to a charity of choice of the winner.

Report macarony May 31, 2020 11:40 PM BST
Cocker
Report SontaranStratagem May 31, 2020 11:49 PM BST
https://news.sky.com/story/the-real-virus-is-racism-london-protesters-ignore-coronavirus-risk-to-call-for-end-to-racial-violence-11998196

The virus has mutated... into racism
Report zorrostrikes June 1, 2020 4:26 AM BST
I had it twice. It comes and goes. A resident. Like mmalaria? Last week ii was very shoft of breath. I keep waking with dry mouth. Cotton mouth. . Everyone is getting iit.
Report lapsy pa June 1, 2020 10:29 AM BST
Jeez Workrider,you had some dose,good to hear you are on the mend.
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