Showing posts with label 206T. Show all posts
Showing posts with label 206T. Show all posts

2009-11-23

Hong Kong reports 225G in Fully Recovered 1 Year Old Male from July at Prince of Wales Hospital

225G is not new. 

The public perception of 225G and the media linkage to hemorrhagic pneumonia is new. 

These Hydra Effect viral backgrounds carrying 225G within ΣPF11 are, in fact, very dangerous strains for what they are doing now and, more importantly, for where they are going . . . no question exists about that risk tendency.  The only question is why hasn't the science community driven the clinical linkages to the forefront before this week?  Fatal outcomes have been documented on record since July in multiple cases from Brasil.

Prince of Wales Hospital in Hong Kong, notable for their handling of the SARS epidemic and additional limited waves in the following years, has released data today concerning the very popular polymorphism, 225G.  A one year old male child presented on July 25 and was reported to have exhibited symptoms as early as July 22.  The report indicates a discharge 3 days after admittance with recovery. 

One week of illness.  One important discussion point for those characterising 225G as essentially a high morbidity polymorphism. 

We certainly do not impeach the idea of higher morbidity.  Biasing any induction solely on singular reports like this Hong Kong case is errant logic, but the evidence does suggest that patience and some exertion may be required to accurately surmise the effector mechanisms of PF11 with and without the pairing of 206T and 225G.  Proceeding with a data basis will slowly build the well-supported pyramidal steps required to undertake a capstone solution against this genetically simple, yet clinically complex disease.

We expect to see another half dozen of the major research areas also report 225G, not because the change is new, but because they’ve had the reins lightened, the leash lengthened, on this particular revision and are now encouraged to report this popular news item. This polymorphism, 225G, is seeded around the world.

225G is not as wide or as deeply penetrating as 225E.  Our team expected and predicted this Hydra Effect with multiple, human-fit strains on diverse genetic backgrounds that would co-circulate in an emerging pandemic due to Influenza Flux during the pre-PF11Ω phases.  An enterprising question might be, “How many Hydra strains will co-circulate in each phase?” 

Numerous sub-species are spreading according to the genetic databases, including TamiFlu Resistant and epitope variant strains.  The lead US public health agency reports again this week an instance of a low reactor against the antisera.  Additionally, silent spread may be expected due to the wide geography of consistent SNP genetics.  The present stock explanation of spontaneous random "mutation" will soon be replaced with more rigourous descriptions based on patterns found in factual data.

The epidemiology of this virus did not suddenly change, just the perception.  The only thing that has changed in the last few days is that the leading public health agencies have allowed public reporting of the 225G revision.  This particular popular 225G with commensurate background of 206T has been in active circulation since May after emerging in April, vectored from both New York and Georgia, and is on record with documented fatal cases since July. 

Nothing new there.

Why are the offical public health agencies raising awareness only now?  While we do applaud the release of information and the present focus on matching clinicals to the sequences, we also caution against obverse speculation.  A primary topic of concern is Cytokinic Dysregulation.  Reliance on inspecific terms like "Cytokine Storm" in the media will only continue to misinform the public on a process that is far less understood than the lead investigators would like to admit.

All of which returns us to the basic categories:
  • What we do know?
  • What we don't know?
What we do know?

Now that matched clinical data is available, however limited, a potential correlation is being drawn on lung tropism. The standing bench studies, including the Palese and JKT team collaboration in 2006, detailing variant tropism based on differential HA reception at α2-3 and α2-6-linked sialic acids evaluated correlative to residue 225 lend evidence to the concept of deep lung involvement though the experiments were conducted by varying permutations of residues 190 and 225 on 1918 variants.  Whereas, we stand in 2009 with quite different genetics that require cross-validation prior to citation with applicability to PF11.

Tissue type targets are compelling studies and this particular superarray protocol may prove even more useful on PF11 than 1918 samples.  We note that though 1918 and PF11 now share 190D and 225G, that all 1918 public sequences show 206S.  206T continues to emerge and conserve regionally in PF11.  All 225G bearing strains after April show 206T, except the July CatNS1706 and the undated Vladivostok01.

Reproducing the glycan microarray procedure with the contemporary and ideal dataset including Brasil and Catalonia may bring a tigher focus onto today's issues.  We couldn't ask for a more balanced set of control factors with Catalonia offering sequences less than one week apart demonstrating both important pairings: 206S/225G and 206T/225G . . . a bench review made to order.

We also do know that a proper immune response, that is a timely and regulated innate immune response, is not occurring in certain of these patients. When the n +1 generations of the virus progeny begin to lyse the host cells, that failure of innate immune function to have responded early leads to an undetected and massive viral load due to the rapid replication trait of PF11. The cell detritus and the density of moving viral particles elicit a host-driven, limited “self-destruct” series of events because the multiple levels of early detection parameters have been bypassed leaving the core essentially defenseless.

What we don’t know?

Much of what we need to know today about Cytokinic Regulation is yet to be studied. 

The systems of feedback loops are extensive with individual effectors often having multiple functions, in some cases, opposing functions.  So please bear in mind that we are looking into an instantaneously self-modifying system that not only self-revises the systemic parameters, but recruits and removes players in the middle of the game and then encourages them to change sides without even changing jerseys.  And to top the difficulties, Heisenberg applies.  Tighten down the screws to look at one molecule and his best friend will no longer stand anywhere near him, though they were conversing with verve before we attempted to measure.

That disclaimer in place, you may still note important aspects of proper cell-to-cell signaling systems from the following discussion as you keep in mind that the presentation is highly compressed for educational purposes.

Though Cytokinic Dysregulation is occurring in most cases at some level of interchange, the 225G and 225E strains may potentially interfere at a more profound level with the early innate response by amplifying the PF11 conserved effect of the NS1 paired Glutamates at residues 96 & 97 that suppresses the IFN synthesis instantiation cycle by binding TRIM25, an early catalyst to RIG-I ubiquination.  Influenza bench researchers don’t know exactly where the failure is occurring or at which combination of cell-to-cell signalers in PF11 or the PF11 225G strains.  Until those identification studies are designed, undertaken and reproduced, discussion at this point is stark hypothesis based frequently on the speaker’s sheer lack of present research content mastery. Apparently, saying “I don’t know?” and then returning to the bench to design and gather a proper foundation of data is a skill rarely encouraged in our “Science for Hire” era.

Our team is unimpressed that the wider science community, with such broad analytical skills and exceptional equipment, relies on pseudo-explanation, this cloud of diversion, by invoking the “Cytokine Storm” phrase.  More than 20 well-characterised and 100 identified distinct molecular signal functions are at work in the early immune response, including cytokines, but not limited to that class of communicators.  Tagging a term for PR purposes is much simpler than tagging a molecule for tracking, but you received your instruments because you can think, not for your ability to improvise inventive talk.

Think.

Eighty billion dollars in research should arrive at a better answer with higher specificity and actionability than the blanket “Cytokine Storm” tome.  Data and procedure discover Facts.  Anything less is purely Public Relations.

Our team continues to hold an opinion that we first described in 2006 concerning Cytokinic Dysregulation and the NS1 protein of Influenza.  Succinctly, the viral ability to suspend innate immunity for up to two days post-infection, as characterised by Mount Sinai this year, prevents the early and required pro-inflammatory Cytokinic Response to viral detection.  That blunting, taken in conjunction with detailed studies around adaptive immunity, may result not only in failure to clear the virus from some patients in a timely fashion, but also in failure to produce a useful quantity and competence of memory T-cells and Ab.  The early failure to clear a rapidly replicating virus like H5N1 or PF11 results in a frank trauma to the immune system when the first generations of viral progeny lyse their host cells after being undetected and flood the tissues with virii and toxic cell detritus.  That disorderly surge of human and viral proteins en masse activates a late and cascading pro-inflammatory response that frequently fails to down-regulate properly.

This explanation is contrary to "pop" science reports that a normal and robust immune response over-generates cytokines and attacks self indiscriminately.  We hold that, by the time the virus has lysed thousands of cells and released millions of virii, that most adjacent tissue areas are "fair game" for immune response due to toxic cell detritus and viral travel.  That flooding of antigen and waste matter, widespread and instantaneous to the immune system, may further interact with some virally induced derangement of the alternative pathway of complement and generate the intensive up-regulation of signaling, pro-inflammation cascades and the resultant tissue damage described in the clinicals as DIC, DAH and ARDS.

Ergo, the findings of massive tissue damage on necropsy is the result of a failed early innate immune response, not a normal robust response.  A normal, properly up- and down-regulated robust innate response clears infection in more than 90% of various infections (viral, fungal and bacterial) and proceeds to generate Ab in short order via the adaptive arm of immunity.

When viral hosting cells properly detect intrusion, flag themselves for apoptosis (cell death) and are then assisted by cytotoxic T-cells, the injection of fragmentins via perforin "tubes" induces an endogenous apoptotic program literally cutting DNA into 200 base multimers (fragments) and eventually condensing chromatin.  That organised molecular result is far less inflammatory and far more useful for antigen identification than the disorderly outcome of a virally "exploded" cell.  Now you can see why proper genetic expression during each phase of this programmed cell death guarantees a lower pathology than the chaotic and toxic outcome of lytic host cell destruction resulting from viral NS1-induced, delayed genetic expression. 

A confluence of PF11 traits (failed early detection, multi-tropism and rapid replication) against the host-pathogen interface may force a limited "self-destruct" in the host upon eventual detection in an attempt to save the organism.  That limited "self-destruct" is not the desired outcome of a normal and robust immune response, but occurs due to a failure of the immune system to detect and respond early in the process.

Timing matters. 

Individual viral genetics and individual host immune genetic expression are primary effectors that must no longer be discounted under the clouds of some nebulous "Cytokine Storm" or Mysterious Mutation.

May we see the sequences paired with the clinicals?



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2009-10-19

225G in Receptor Binding Domain Traveled to China without Vaccine Pairing of 206S

The expected Hydra Effect on Hemagglutinin patterns are being validated with the latest sequence deposits.  Multiple antigenic heads continue to arise within single geographic areas while the march from Southern Hemisphere winter strains (May-July 2009) into the Northern Hemisphere ΣPF11 lays distinct markers.

Two sequences today from China carry the Receptor Binding Domain polymorphism coding for 225G similar to the fatal cases during the South American winter.  These sequences represent the first movement of 225G into China and the second into Asia after Hiroshima201, although we have observed 225E in one instance, Changsha78.

This incursion of 225G makes Zhejiang Province one of very few geographic locales to represent both vaccine RBD polymorphisms as 226R was demonstrated mid-summer in A/Zhejiang/DTID-ZJU01/2009.

Let's examine the new Yiwu HA segments for this analysis:
These two Zhejiang province cases were sampled in September making the sequences contemporary for evaluation of the genetic acquisition cycle pertinent to North America today.  Each case continues the recent affinity of 206T with 225G.  Nine of fourteen instances of 225G on record within ΣPF11 are paired with 206T and only one isolated sequence after April has 206S in the pairing. You will note that the live vaccine is based on an early finding in Texas and Mexico (Texas05 pairing of 206S / 225G).  The current sequences continue to demonstrate a directional movement away from those four early Texas and Mexican strains from April. 

The Yiwu11 case, 41F, is specifically noted as having "severe symptoms".  Confidence is increased that these sequences are valid due to independent verification.  The two sequences were managed from separate labs though the hosts were apparently from the same city, Yiwu, and suffered during the same time frame.

Each of the two HA sequences represent a novel introduction into ΣPF11.   Yiwu11's closest GenBank match is 1758 of 1774 nucleotides and ZJU02's closest match is Yiwu11.  The two sequences are an exact nucleotide match (1759/1759) at all alignable positions (sequence truncation at Yiwu11 head and ZJU02 tail), potentially representing perfect transmission in Asia of 225G.  The Catalonia sequences from Spain in early August initiated the first and only previously recorded perfect segment transmission of a 206T / 225G pairing.  The Brasil deaths share amino acid homology, but varied at a silent SNP coding for Lysine at residue 222 (222K). 

If a cluster is in effect with these two sequences, then we may be observing a foundational, well-passaged, human-fit strain in the Northern Hemisphere heralding Pandemic 2.0 Influenza.    Only time will tell.

A correlation is also emerging in consideration of geography and population ethnicity with nine of the fourteen 225G cases in areas with a substantial Hispanic population. The ethnic profiles of the individual cases are not identified. Yiwu is a burgeoning commodities trading area with a substantial immigrant population including import/export workers from South America.  If we note that NY and Georgia have Hispanic populations, then only Hiroshima remains as a potential non-Hispanic area.  At any rate, the correlation of 225G to areas with Hispanic human genotypes bears scrutiny for pathogen-host interaction at the genetic level. 

Recall that other human-fit genetic advances are recorded in the Zhejiang Province recently.  Of minor note, the Neuraminidase segments of Yiwu11 and ZJU02 are also novel to the reservoir though the amino acid levels match widely.  A third base SNP that merits attention has now spanned from the original introduction in A/Netherlands/602 to ZJU02, A408G coding at residue 136 for a synonymous Glutamine (136Q).  Movement at this amino acid position is implicated in Relenza resistence (136K), though the synonymous change from the Netherlands and Zhejiang is not accorded trait enhancement in the literature.

This advancing Antigenic Diversity and movement of 225G separated from the 206S into a highly populated country prior to winter should generate a call for wider surveillance and more rapid deposition of sequences.


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2009-10-02

Spain's Addition to Third Sub-Clade with HA 225E RBD Change

A/Catalonia/S1120, sampled on 2009-07-20, Segment 4 (HA) and Segment 6 (NA), from a 1 year old child falls into a third sub-clade (with earlier Cat378 and Cat387) in this large sequence deposit from Spain that is varied by position 225 in the Receptor Binding Domain.  Sao Paulo, Brasil showed a very similar hyper-morphic pattern at this position (225G & 225N) during the same timeframe though Brasil was in their winter.  Spain is showing polymorphisms coding for 225G and 225E.

The CatS1120 sequence shows 225E paired with 206T.

Neuraminidase Quadruple Combination
CatS1120 = 106I, 248D, 275H, 286S


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2009-09-17

Deaths in Brasil Match 1918 and H5N1 Receptor Binding Domain at HA 225G

Within 9 Sao Paulo sequences released today from Brasil spanning late July to mid August 2009, we find at least 6 distinct HA backgrounds of which 5 are compelling and 2 are novel to the PF11 reservoir.  Sequences from potentially expired patients are indicated boldly.  This level of genetic diversity at key antigen sites on the Hemagglutinin (HA/H1) in a single geography during a common timeframe is of great interest and, at a minimum, reflects regional Acquisition Acceleration. 

Bear in mind that in the early stages of the pandemic, PF11 exhibited extreme stability demonstrating 100% homology across entire countries.  You will find in the early record several groups of more than 400 HA and NA sequences across diverse geography that match exactly.  We are now in a new phase as the PF11 reservoir has been passaged within humans through one winter cycle in the Southern Hemisphere and has demonstrated the ability to rapidly gain beneficial genetic traits, traits that drive toward fatal outcomes.

Background1
SaoPaulo53823
2E
188I
296H

The presumably fatal case appears to be the first instance of 188I on a PF11 background.  Human-fit Seasonal Influenza from 2007, 2008 and 2009 as well as the 2001 HKswNS1569 carry 188I, including ShanghaiLWS1 with the M230I RBD polymorphism.  Movement at 188 to Asparagine (N) has occured in NY3502, Utsunomiya01 and Utsunomiya02.

Background2
SaoPaulo53838
2E
225N
296H

Background3
SaoPaulo57831
2E
296H

Backgrounds1, 2 & 3 continue the PF11 Intra-Segment exclusivity of 206T and 296H though proximal donors of 206T are available.

Background4
SaoPaulo53845
206T
225N

In addition to these two specimens from Brasil, 225N is found only on one other PF11 sequence, NY4099.  Several Korean swine carry the change.  More importantly, a linked candidate, A/swine/Hong Kong/NS1659/2001, featuring widely in PF11 Genetic Acquisition paths also carries 225N.  HKswNS1659 shows HA:188I, 189T, 252M & 261K with additional matching to the 2008-2009 Seasonal Influenza NA Triple Combination, 106I, 248N, 286G.

Background5
SaoPaulo53206, SaoPaulo53225
206T
225G

Receptor Binding Domain changes at 225 may be correlative to fatal outcomes in Brasil as 100% of these cases appear to have expired (4/4).  However, the RBD change may not be a requirement for fatality in SaoPaulo.  Of three cases carrying only the 206T revision, one (SaoPaulo54392) appears to have expired.

225G is consensus for H5N1, is carried on NewYork1918 and only appears in six other PF11 sequences across the US and Mexico.

MX3955
MXInDRE4114
NY04
GA01
TX05
TX11

225X is demonstrated several times in the US proximal to 225G in area and time.

NY11
NY31
TX10
CA13
NE02


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SingaporeTLL10 HA demonstrates 3 H5N1 amino acids: 206T, 226R and 261V

A/Singapore/TLL10, sample 2009-07-27, is a first on the PF11 background.

SingTLL10 is the first on PF11 to carry 261V, though movement at that position has been documented in Italy51 and Italy53 with 261G and a downstream 263D entered PF11 with Tomsk01 and then continued with 3 Thai sequences (ThaiCU-H9, ThaiCU-B938, ThaiCU-H276).

261V is wild type for H5N1 including Anhui02 that carries all three of the amino acid changes mentioned here for SingTLL10:

  • 206T
  • 226R
  • 261V
H5N1 Anhui02 is a potential donor for 296H that seems to track primarily to 206T bearing strains.

This expansion deeper into Southern Asia with 226R brings the number of sequences bearing the H5N1 match into double digits.  RBD changes matching H5N1 demand scrutiny.  For background, please read an earlier 226R Study.


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2009-09-13

United States (NorthEast) HA Diversity at 206; 296H Intra-Segment Exclusivity Continues

A pair of sequences each from Pennsylvania and Rhode Island deposited at GenBank on 2009-09-10 demonstrate continued Hemagglutinin diversity within single geographies and similar time frames.  Multiple PF11 sub-clades in the United States and worldwide show ongoing human fitness and co-existance ability producing a Hydra Effect.




As of this moment, the Intra-Segment Exclusivity between 296H and 206T continues on the PF11 background.  Pennsylvania, Rhode Island and Massachusetts have observed candidate donors of 206T; however, the genetic diversity of 206S with 296H remains in those states and with similar occassion in many international locales.

The highly correlative 2E is found in the 4 referenced 296H Hemagglutinins in this United States deposit.

PA06, RI07, MA10 and IN17 are an exact nucleotide match to A/Italy/127 from 2009-06-17, the only PF11 sequence in the world to carry the 256L on Neuraminidase (with 106I/248N). 

The rare 256L is originally found on the 1918 Brevig Mission sequence.  256L candidate donors include many H3N2 2008 Seasonal Influenza specimens and several H1N2 2008 swine from Oklahoma and Texas.

RI07 on Segment 6 (Neuraminidase) is an exact nucleotide match to a pivotal sequence that will be detailed later from Germany, A/Bayern/66.  The IN17 NA also tracks to RI07 and Bayern66 at 1409 of 1410 nucleotide positions.  Bayern66 is strongly related to the HA of the Russian and Northern European heralds of HA:226R, Omsk01, Ekaterinburg01 and Finland553 and to the HA of Tomsk01.


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2009-09-10

HA:237I Downstream from RBD in TaiwanT1821 and 4 Russian Specimens

A rare Isoleucine, 237I, occurs within ΣPF11 downstream from the Receptor Binding Domain in A/Taiwan/T1821 sampled 2009-05-30 and in 4 Russian sequences.  206T is shared in all five 237I sequences.

Three of the four Russian sequences are from Moscow and were sampled on 2009-05-26 in the same week as the Taiwan sequence.  The fourth is Irkutsk02 that also carries the RBD polymorphism 226R.

An intra-segment exclusivity exists between 206S and 237I at this time upon PF11 backgrounds.


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Taiwan Deposits 3 Sequences Today: 206T found in 7 of 8 Taiwan Samples on File, 296H in the 8th.

Taiwan has 8 PF11 sequences on file at GenBank from mid-May to June 2009 across a somewhat representative sample of host ages (5, 19, 22, 24, 27, 32, 32 and 52).

The 3 new sequences today, sampled in June, continue the local trend of 206T conservation on Hemagglutinin. 7 of the 8 Taiwan sequences on file carry the Threonine at 206.

Of special interest is the 8th sequence, A/Taiwan/T1773, submitted on 2009-08-10 from a 19F sampled in late May showing 206S and the only 296H in Taiwan, demonstrating again the intra-segment exclusivity of 296H and 206T. Though geographic and timing consensus is 206T in Taiwan, the 206S in the 19F appears with the 296H.

TaiwanT1773 also demonstrates the strong pairing between 296H and the 2E originally found in 1918 sequences and now several PF11 HA segments.

The TaiwanT1773 sequence matches Finland555 and its 19 equal worldwide sequences (NE US, Italy and Brasil) but for the disquieting combination SNP and downstream adjacent deletion near the tail of the HA. Furthermore, the TaiwanT1773 sequence is distinct at a different position from each of other regional 296H carriers, e.g. Shanghai143T, Tokushima1, and Shandong1.


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