Posts Tagged ‘D225N’

Swine Flu Update

By Ilene

Previous series of swine flu updates by me here.

Transmission of Fatal H1N1 D225G/N Accelerates Concerns

Ukraine takes measures to combat swine flu, closes all school - Kiev

Courtesy of Dr. Henry Niman, Recombinomics Commentary

Recently released H1N1 HA sequences have significantly accelerated pandemic concerns.  These sequences have either D225G, D225N, or both and produce a case fatality rate at or near 100% in many countries…. 

By the 100% fatality rate, Dr. Niman means that they are finding these changes in the tested fatal cases in some countries.  Keep in mind, these are small numbers of cases.  It does not mean that all cases with these changes prove fatal.  It might be more clear to say a large portion of the fatal cases show these changes in the infecting viruses.

[the] transmission and expansion of these fatal sequences in eastern Europe, including Russia have increased concerns, as has the "low reactor" status as determined by Mill Hill for a tested Ukraine sequence.

Some of the earliest sequences with D225G were in the United States last spring and were generally mild.  However, initial cases in the US were generally mild, which may have reflected low  viral loads infecting a naïve population…

"Low reactors" status means that the virus is not triggering the immune response expected due to changes in the structure of certain viral proteins (here, the influenza hemagglutinin proteins).  Immune responses target specific proteins and the target proteins’ structure is critical to the immune response.  Not all changes in a protein will greatly reduce its immunogenicity (ability to stimulate the immune response) but certain changes will.  The change from the wild-type (common) HA protein to the HA protein with the D225G marker appears to have this adverse effect--i.e., the altered viruses will not provoke the stronger immune response generated in response to the wild-type virus and/or the swine flu vaccine.   

These observations are cause for concern, not alarm.  The changes in the H1N1 virus are natural and predictable; Dr. Niman predicted these changes would occur.  

There already was interest in position 225 for a number of reasons.  D225N  was in seasonal H3N2 and linked to the fixing [establishment of widespread] of adamantine resistance (S31N), while D225G was in 1918 and 1919 samples and linked to a change in receptor binding domain specificities which would target subsets of cells in the lung.  In addition, the polymorphism [genetic change] was jumping from one genetic background to


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Flu News

Here’s the latest by Dr. Henry Niman. I’ve made a few helpful comments in red. – Ilene

D225E and D225N H1N1 RBD Changes in Turkey

Courtesy of Henry Niman, PhD

Swine flu virus, showing the structure of the virion: the outer proteins hemagglutinin and

Recombinomics Commentary
January 5, 2010

The Refik Saydam National Public Health Agency has released 29 HA [hemagglutinin] sequences from Ankara, Turkey. Several were partial sequences, but 26 covered the receptor binding domain and 8 had D225E,… while one had D225N,… 

My comment:  D225 is the most common or wild-type receptor binding protein - the hemagglutinin (HA) protein – which enables the virus to bind to tissues in the respiratory tract of infected people. 

A change in the amino acid in position 225 of the receptor binding domain (RBD) is symbolized by using the letter representing the new amino acid, e.g. "G" for glycine in "D225G." The marker D225G signifies that a glycine (G) is present in the 225 position, replacing the amino acid usually in this position, aspartic acid, or D (hence the wild-type marker is "D225"). Glutamic acid, E, and asparagine, N, are two other amino acids that have been found in this position in non-wild-type swine flu viruses.

The change in the receptor binding protein from D to G alters the protein’s preference for binding to human tissues. Viruses with the D225G marker bind in the lung tissue, rather than binding in the upper respiratory tract (nasal area and throat), the more typical target. This appears to result in more severe disesase which may trigger a "cytokine storm" reaction in the lungs.  Whether substitution with "E" or "N" causes similar changes is not known. Theoretically, if the immune response is generated against the wild-type protein D225, viruses with D225G, D225E or D225N markers might avoid the immune system’s response. 

[Back to Dr. Niman] The outcomes of these patients were not given but media reports have described a rapid in increase in H1N1 fatalities in Turkey.  A large number of HA sequences with D225E has been published from Spain, and recently released GISAID sequences from Sweden and the UK also have D225E, including three fatal cases from Sweden. The prior reports of D225G and D225N associations with fatal cases has raised concerns that changes at position 225 could alter tissue tropism or aid in immune escape, leading to more severe and fatal cases.

In…
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H1N1 Update

H1N1 Update:  Watching and Waiting  

by Ilene with guest expert Dr. Henry Niman at Recombinomics

EM of swine influenza (H1N1) virus particles (virions), determined to be the cause of the

Watching and Waiting

Although the numbers of new cases of swine flu have been declining in many regions, including the United States, it is too early to know whether or not there will be subsequent waves of disease.

"Based on my experience with new diseases and the lessons learned from past pandemics, I think we should remain cautious and observe the evolution of the pandemic over the next six to 12 months before declaring victory," World Health Organization Director General Margaret Chan tells Swiss newspaper Le Temps. (World Health Official Says Swine Flu Still a Threat)

Although the WHO is taking a cautious approach, changes in the virus’s genome that increase its virulence and resistance to Tamiflu are becoming more common.  Dr. Henry Niman, expert in flu virus evolution, believes another wave of flu illnesses will occur in early 2010.  In addition, he believes resistance to Tamiflu will become "fixed," similarly to how this genetic change evolved in the seasonal H1N1 virus.  (See Flu Update: Tamiflu resistance and Ukraine update, and Efficacy of Roche’s Flu Drug Tamiflu In Doubt, by David Phillips.)

WHO: H1N1 swine flu pandemic will stick around for another year

The World Health Organization warned government health authorities to remain vigilant on the H1N1 swine flu pandemic, saying the virus could mutate before vaccines can help it dissipate.

The World Health Organization is confident that the H1N1 swine flu pandemic will be under control in a year’s time – however, WHO officials warned global governments to remain vigilant for any mutations in the troublesome bug.

Dr. Niman believes this wave will be more severe than the previous two--but not due to random mutations. Rather, this will result from the process of recombination. Due to recombination, increasingly greater transmission of aggressive variants (D225G, D225E and D225N) and Tamiflu-resistant viruses will occur.

Ukraine

I’ve reprinted two recent articles at Recombinomics, with my comments in blue.

The WHO Surprise on D225G / D225N H1N1 Fatalities, Recombinomics Commentary

After considering the current available virological, epidemiological and clinical findings and following discussions on an earlier draft with WHO and its European-based Collaborating Centre ECDC has come to a preliminary formulation namely that the G222D/N


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Phil's Favorites

US-China trade deal: 3 fundamental issues remain unresolved

 

US-China trade deal: 3 fundamental issues remain unresolved

The game is far from over. rawf8/Shutterstock.com

Courtesy of Penelope B. Prime, Georgia State University

The U.S. and China have reportedly reached a so-called phase one deal in their ongoing trade war.

While few details have been disclosed, the agreement principally seems to involve the U.S. calling off a new round of tariffs that were slated to take effect on Dec. 15 and removing others already in place in exchange for more Chinese purchases of U.S. farm products.

Good n...



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Kimble Charting Solutions

Euro Breakout In Play? Gold Bulls Sure Hope So!

Courtesy of Chris Kimble

The Euro has spent much of the past 2 years trading in a down-trend.

Though precious metals like Gold have fared well, this has been a bit of a headwind because it means that the US Dollar has remained firm.

Big Test In Play for the Euro

The Euro is testing a confluence of important support just as the downtrend is narrowing and ready for a “break”. That support includes lower falling wedge support and the Euro’s long term up-trend support line (see points 1 and 2).

If the Euro can succeed in breaking out at (3), it would be bullis...



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Zero Hedge

China Refuses To Confirm Trade Deal As Local Media Stays Dead Silent

Courtesy of ZeroHedge View original post here.

Markets are closed in Beijing, the workday is over, and there no official reports in local media of an actual trade deal, that is because, as we explained on Thursday night, the language of the deal will never be made public and there would be no signing event between President Trump and President Xi. One may ask if there is even a "deal"?

As the ...



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Insider Scoop

8 Healthcare Stocks Moving In Friday's Pre-Market Session

Courtesy of Benzinga

Gainers
  • Sarepta Therapeutics, Inc. (NASDAQ: SRPT) stock surged 36.4% to $137.00 during Friday's pre-market session. The market value of their outstanding shares is at $6.1 billion. The most recent rating by Janney Capital, on December 13, is at Buy, with a price target of $175.00.
  • GlaxoSmithKline, Inc. (NYSE: GSK) shares surged 1.1% to $46.44. The market value of their outstanding shares is at $112.9 billion. According to the most recent rating by UBS, on November 21, the current rating is at Buy.
  • AstraZeneca, Inc. (NYSE: ...


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Digital Currencies

Three Men Arrested In NJ For Running Alleged $722 Million Crypto Ponzi Scheme

Courtesy of ZeroHedge View original post here.

Authored by Kollen Post via CoinTelegraph.com,

United States authorities in New Jersey have announced the arrest of three men who are accused of defrauding investors of over $722 million as part of alleged crypto ponzie scheme BitClub Network, per a Dec. 10 announcement from the Dep...



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Lee's Free Thinking

Chart Shows the Fed Ramping Up Not QE - Funding Almost All Treasury Issuance

 

Chart Shows the Fed Ramping Up Not QE – Funding Almost All Treasury Issuance

Courtesy of Lee Adler, Wall Street Examiner 

The Fed is ramping up “Not QE” .

The Fed bought $2.2 billion in notes today in its POMO, “not QE,” operations. Actually $2.15 billion because they sold back a whole $50 million. Must have been a little glitch in the force.

This brings the Fed’s total outright purchases of Treasuries to $170 billion since it started Not QE, on September 17.

It also did $107 billion in gross new repo loans to Primary Dealers to buy Tre...



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Chart School

Silver stock taking the sector higher

Courtesy of Read the Ticker

As the US economy begins to show late cycle characteristics like: GDP slowing, higher inflation, higher wage costs, CEO confidence slump. 
Previous Post: Gold Stocks Review

The big players in the market are looking for the next swing off good value lows. This means more money is finding it way into the gold and silver sector, and it is said gold and silver stocks actually lead the metal prices. The cycle below shows prices are ready to move in the months ahead (older chart re posted).




 

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Members' Corner

Sacha Baron Cohen Uses ADL Speech to Tear Apart Mark Zuckerberg and Facebook

 

Sacha Baron Cohen Uses ADL Speech to Tear Apart Mark Zuckerberg and Facebook

By Matt Wilstein

Excerpt:

Sacha Baron Cohen accepted the International Leadership Award at the Anti-Defamation League’s Never is Now summit on anti-Semitism and hate Thursday. And the comedian and actor used his keynote speech to single out the one Jewish-American who he believes is doing the most to facilitate “hate and violence” in America: Facebook founder and CEO Mark Zuckerberg.

He began with a joke at the Trump administration’s expense. “Thank you, ADL, for this recognition and your work in fighting racism, hate and bigotry,” Baron Cohen said, according to his prepared...



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The Technical Traders

VIX Warns Of Imminent Market Correction

Courtesy of Technical Traders

The VIX is warning that a market peak may be setting up in the global markets and that investors should be cautious of the extremely low price in the VIX. These extremely low prices in the VIX are typically followed by some type of increased volatility in the markets.

The US Federal Reserve continues to push an easy money policy and has recently begun acquiring more dept allowing a deeper move towards a Quantitative Easing stance. This move, along with investor confidence in the US markets, has prompted early warning signs that the market has reached near extreme levels/peaks. 

Vix Value Drops Before Monthly Expiration

When the VIX falls to levels below 12~13, this typically v...



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Biotech

Why telling people with diabetes to use Walmart insulin can be dangerous advice

Reminder: We are available to chat with Members, comments are found below each post.

 

Why telling people with diabetes to use Walmart insulin can be dangerous advice

A vial of insulin. Prices for the drug, crucial for those with diabetes, have soared in recent years. Oleksandr Nagaiets/Shutterstock.com

Courtesy of Jeffrey Bennett, Vanderbilt University

About 7.4 million people ...



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Mapping The Market

How IPOs Are Priced

Via Jean Luc 

Funny but probably true:

...

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