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

Bloomberg Has Built a Star Wars Machine to Try to Steal the Democratic Nomination

Courtesy of Pam Martens

Michael Bloomberg

Billionaire Michael Bloomberg is used to getting his way. After serving two terms as New York City’s Mayor as a Republican, he used his own vast stash of cash to repeal term limits and give himself another four-year term, running as an Independent. Now he has promised to do the unprecedented: spend $1 billion of his own money to install himself as President of the United States, running on the Democratic ticket.

Bloomberg’s campaign increasingly resembles an octopus with money gushing out of its tentacles into anything and everything that will inject Mic...



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Zero Hedge

China Stocks Surge, S&P Futs Hit All Time High On Latest Chinese Monetary Stimulus

Courtesy of ZeroHedge View original post here.

European stocks rose on Monday, Chinese shares surged, recovering all their post-coronavirus losses and S&P and Nasdaq futures jumped to new all time highs as investors took encouragement from the Asian country’s monetary (if not fiscal) pledges to support the world’s second-biggest economy in the face of the coronavirus outbreak. The yen and gold both slipped.

...



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Insider Scoop

AMX Buys Fellow Alabama Company Powell, Adds Reefer Capacity

Courtesy of Benzinga

Alabama Motor Express will push deeper into the refrigerated business with purchase of Powell Transport Solutions.

The acquisition, announced earlier this week, will bring 35 refrigerated trailers to AMX, the company said in a statement. A spokeswoman for AMX, in response to questions submitted by FreightWaves, said the company's business is currently about 10% refrigerated. The AMX fleet before the acquisition was 210 trailers, she said.

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Biotech & Health

Coronavirus: the blow to the Chinese economy could be felt for years

 

Coronavirus: the blow to the Chinese economy could be felt for years

Courtesy of Chusu He, Coventry University

Investors are still being fairly complacent about the novel coronavirus. After the number of new daily cases suddenly shot up to more than 15,000 on February 12 following more than a week of decline, there were some jitters in the markets. With Chinese authorities saying the increase was due to a decision to broaden the definition for diagnosing people, there were falls in the region of 1% in European markets, and smaller retrenchments in Asia and North America.

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Members' Corner

How to Stop Bill Barr

 

How to Stop Bill Barr

We must remove this cancer on our democracy.

Courtesy of Greg Olear, at PREVAIL, author of Dirty Rubles: An Introduction to Trump/Russia

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The Technical Traders

Is The Technology Sector Setting Up For A Crash? Part I

Courtesy of Technical Traders

One thing that continues to amaze our research team is the total scale and scope of the Capital Shift which is taking place across the globe.  For almost 5+ years, foreign investors have been piling into the US stock market chasing the stronger US dollar and continued advancement of US share prices. It is almost like there is no other place on the planet that will allow investors to pool capital into such a variety of strong assets while protecting against foreign capital risks.  Yet the one big question remains – when will a price reversion event hit the US stock
market?

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Kimble Charting Solutions

Joe Friday Says Germany (DAX) Could Rally 30%, Happy Valentines Day For The Bulls!

Courtesy of Chris Kimble

German DAX Index “weekly” Chart

The German DAX is one of the more important global stock market indices, as it represents the largest economy / market in the Euro Zone.

So it would be a real treat for the bulls to see this stock market index breakout as we celebrate Valentine’s Day.

The facts, Ma’am. Just the facts; The German DAX looks to have formed a bullish ascending triangle over the past 3 years and it is currently attempting to breakout above the top at (1)....



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ValueWalk

Russell 2000 Index (RUT) hits an almost one-month high

By Gorilla Trades. Originally published at ValueWalk.

Ad the Russell 2000 Index (INDEXRUSSELL: RUT) hit an almost one-month high today, commenting on today’s trading Gorilla Trades strategist Ken Berman said:

Q4 2019 hedge fund letters, conferences and more

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While the overnight session was nothing short of scary stocks held on to most of yesterday's gains and small-caps even extended their winning streak. The Russell 2000 Index (INDEXRUSSELL: RUT) hit an almost one-month high today, finishing higher for the fourth day in a row while outperforming the large-cap benchmarks, and since the Volatility...



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Chart School

Dow theory warning from the Utilities Index

Courtesy of Read the Ticker

Charles Dow died in 1902, and the investors should thank him for his ever lasting Dow Theory Analysis.

Carrying on this blog theme looking at the Utility stocks. Previous post.
Dow Jones Utility index could trade like the FANGs
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Digital Currencies

Bitcoin Price May Hit $27K All-Time High By Summer, Predicts Fundstrat's Tom Lee

Courtesy of ZeroHedge View original post here.

Authored by William Suberg via CoinTelegraph.com,

Bitcoin is primed for average gains of almost 200% over the next six months, one of its best-known supporters has told mainstream media. 

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Lee's Free Thinking

Why Blaming the Repo Market is Like Blaming the Australian Bush Fires

 

Why Blaming the Repo Market is Like Blaming the Australian Bush Fires

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The repo market problem isn’t the problem. It’s a sideshow, a diversion, and a joke. It’s a symptom of the problem.

Today, I got a note from Liquidity Trader subscriber David, a professional investor, and it got me to thinking. Here’s what David wrote:

Lee,

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Philip R. Davis is a founder Phil's Stock World, a stock and options trading site that teaches the art of options trading to newcomers and devises advanced strategies for expert traders...

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