Thursday, June 6, 2013

 AGE RELATED EXPRESSION OF DEFICIENT GENE

Although one may have deficient gene,death from its consequences varies based on how critical lack of expression is to the body. Lack of function in a critical tissue leads rapidly to death. Expression of a deficient gene depends on whether it it dominant or recessive, and whether one is homo or heterozygotic as related to the gene in question.  many diseases of genetic basis express themselves at a letter stage in life.  Polycystic Kidney disease for example gives its full blown syndrome only after 30 years of age, and starts worsening  to finally take the life of the bearesr in  their 5th ot sixth decade of life. Althto though one cannot say for sure what intervened with age for the syndrome to fully express, we know that immune and hormonal developments contribute significantly to this unfortunate unfolding.
We know that in infectious processes we encounter as we age, there is disturbances of Interferons levels, and if one has an autoimmune disease, these interferon levelsare somewhat permanent or constant.  Interferon activate T cell and boost Immunity but also secondarily immune system surveillance of cancer occurrence. This interferon seems linked to Class I histocompatibilty HLA-A,B,C.

In Women however, as they age and enter reproductive age, there is need to suppress class I HLAin order to "tolerate" a child/fetus.  It is assumed that a vague of hormone driven gene methylation seems to be the mechanism.  Gene methylation will silence many genes and could potentially silence normal genes that where conterbalancing the gene defect.  Defectuous genes will this way get there chance to finally express themselves and cause progression of syndromes thay can cause.  Androgenic development in males achieves the same deterioration.  Giving Azacytidine had reversed these methylation by the way although clinical trials are still ongoing on whetehr it can meaningfully change the course of these gene based diseases.That is before irreversible tissue damage sets in.

Wednesday, June 5, 2013

CRK GENE
It is a co-factor to many Kinases, and sometime act as a regulator
CRK (gene) has been shown to interact with:
IMPORTANT TARGET OF IMMUNOTHERAPY
MUNITIAE AT THE CELLULAR MEMBRANE

TO FIGURE OUT THE FOLLOWING EXCERPTS ONE SHOULD REMEMBER THE PHENOMENA OCCURRING DURING INJURY TO THE BLOOD VESSEL. WHEN A BLOOD VESSEL IS OPEN DURING AN INJURY, IT IS THE SUDDEN EXPOSURE OF BLOOD CELL WITH OUTSIDE TISSUE/PROTEIN (COLLAGEN) THAT TRIGGERS COAGULATION, PLATELET ACTIVATION.

NOW IMAGINE A MOLECULE OF ESTROGEN ARRIVING AT CELL SURFACE AND BINDING TO ITS RECEPTOR, 2 THINGS HAPPEN, ONE IS THAT THE LINKAGE CAUSES AN INTERNAL SIGNAL TRANSDUCTION GOING THROUGH A PATHWAY
BUT SOMETIME THE ALL RECEPTOR DETACHES WITH ITS STIMULANT AND IS INTERNALIZED.  AT POINT OF DETACHEMENT, THERE IS CONTACT OF FIBRONECTIN  (EXTRACELLULAR) WITH CYTOSOL CONTENT FOCAL ADHESION KINASES (fak) AND THE REST FOLLOWS (5 BULLETS) 

1.the binding of a neuropeptide to its cognate GPCR triggers the activation of multiple signal transduction pathways that act in a synergistic and combinatorial fashion to relay the mitogenic signal to the nucleus and promote cell proliferation. A rapid increase in the synthesis of lipid-derived second messengers with subsequent activation of protein phosphorylation cascades is an important early response to neuropeptides. An emerging theme in signal transduction is that these agonists also induce rapid and coordinate tyrosine phosphorylation of cellular proteins including the nonreceptor tyrosine kinase p125fak and the adaptor proteins p130cas and paxillin. This tyrosine phosphorylation pathway depends on the integrity of the actin cytoskeleton and requires functional Rho.(ROZENGHURT)

THAT IS AFTER A GROWTH FACTOR HAS LINKED TO ITS RECEPTOR, COUPLING WITH A G-PROTEIN WILL TRIGGER AN EXPLOSION ON PHOSPHORYLATION IN ALL DIRECTION, ON THESE PHOSPHORYLATION HITS A KINASE OF AN IMPORTANT PATHWAY AND THE PATHWAY ENTER INTO ACTION.

2.This effect required the autophosphorylation site of FAK, which is a binding site for Src family kinases. Integrin-mediated phosphorylation of Cas was not, however, compromised in fibroblasts lacking FAK.
FAK seems not to be necessary for phosphorylation of Cas, but when autophosphorylated, FAK may recruit Src family kinases to phosphorylate Cas. Cas was found to form complexes with Src homology 2 (SH2) domain-containing signaling molecules, such as the SH2/SH3 adapter protein Crk, following integrin-induced tyrosine phosphorylation. Guanine nucleotide exchange factors C3G and Sos were found in the Cas-Crk complex upon integrin ligand binding. These observations suggest that Cas serves as a docking protein and may transduce signals to downstream signaling pathways following integrin-mediated cell adhesion.(VUORI ET AL)

3. The focal adhesion kinase (FAK), a protein-tyrosine kinase (PTK), associates with integrin receptors and is activated by cell binding to extracellular matrix proteins, such as fibronectin (FN). FAK autophosphorylation at Tyr-397 promotes Src homology 2 (SH2) domain binding of Src family PTKs, and c-Src phosphorylation of FAK at Tyr-925 creates an SH2 binding site for the Grb2 SH2-SH3 adaptor protein. FN-stimulated Grb2 binding to FAK may facilitate intracellular signaling to targets such as ERK2-mitogen-activated protein kinase. We examined FN-stimulated signaling to ERK2 and found that ERK2 activation was reduced 10-fold in Src- fibroblasts, compared to that of Src- fibroblasts stably reexpressing wild-type c-Src. FN-stimulated FAK phosphotyrosine (P.Tyr) and Grb2 binding to FAK were reduced, whereas the tyrosine phosphorylation of another signaling protein, p130cas, was not detected in the Src- cells.(SCHLAEPFER ET AL)
Src-family binding and phosphorylation of FAK at Tyr-925 creates a Grb2 SH2-domain binding site and provides a link to the activation of the Ras signal transduction pathway. In Src-transformed cells, this pathway may be constitutively activated as a result of FAK Tyr-925 phosphorylation in the absence of integrin stimulation.

4. Pyk2 overexpression enhanced FN-stimulated activation
5.RAFTK/Pyk2 is expressed mainly in the central nervous system and in cells derived from hematopoietic lineages, while FAK is widely expressed in various tissues and links transmembrane integrin receptors to intracellular pathways. This review describes the role of RAFTK/Pyk2 in various signalling cascades and details the differential signalling by FAK and RAFTK/Pyk2. of co-transfected ERK2.(AVRAHAM)
===============================================================

SO 2 MAIN ROUTES
THE ERK2

AND THE GRB2

DO REMEMBER GRB2 IS THE WILD WILD WEST OF GENES!

Function and expression

Grb2 is widely expressed and is essential for multiple cellular functions. Inhibition of Grb2 function impairs developmental processes in various organisms and blocks transformation and proliferation of various cell types, and so it is not surprising that a targeted gene disruption of Grb2 in mouse is lethal at an early embryonic stage. Grb2 is best known for its ability to link the epidermal growth factor receptor tyrosine kinase to the activation of Ras and its downstream kinases, ERK1,2. Grb2 is composed of an SH2 domain flanked on each side by an SH3 domain. Grb2 has two closely related proteins with similar domain organizations, Gads and Grap. Gads and Grap are expressed specifically in hematopoietic cells and function in the coordination of tyrosine kinase mediated signal transduction.

Domains

The SH2 domain of Grb2 binds to phosphorylated tyrosine-containing peptides on receptors or scaffold proteins with a preference for pY-X-N-X, where X is generally a hydrophobic residue such as valine (see [3]).
The N-terminal SH3 domain binds to proline-rich peptides and can bind to the Ras-guanine exchange factor SOS.
The C-terminal SH3 domain binds to peptides conforming to a P-X-I/L/V/-D/N-R-X-X-K-P motif that allows it to specifically bind to proteins such as Gab-1.[4]

Interactions

Grb2 has been shown to interact with Arachidonate 5-lipoxygenase,[5][6] Lymphocyte cytosolic protein 2,[7][8][9][10][11] GAB2,[12][13][14] B-cell linker,[15][16][17][18] Abl gene,[19][20] CD28,[21][22] FRS2,[23][24][25][26] Mitogen-activated protein kinase 9,[27][28] CD22,[29][30] NEU3,[31] ETV6,[12] MAP2,[32][33] Dock180,[34][35] PIK3R1,[36][37] SH2B1,[38][39] CRK,[40][41][42] GAB1,[7][43][44] MST1R,[45][46] DNM1,[47][48] Huntingtin,[49] Src,[50][51] Beta-2 adrenergic receptor,[52] VAV2,[53][54] ADAM15,[55] RAPGEF1,[56][57] VAV1,[58][59][60][61] HER2/neu,[54][62][63] Epidermal growth factor receptor,[2][43][53][62][64][65][66][67][68][69] PDGFRB,[69][70][71] PTK2,[72][73][74][75][76] Erythropoietin receptor,[77][78] Linker of activated T cells,[79][80][81] Dystroglycan,[82] SH3KBP1,[83][84] Granulocyte colony-stimulating factor receptor,[85] DCTN1,[86] CDKN1B,[87] Colony stimulating factor 1 receptor,[88] EPH receptor A2,[89] KHDRBS1,[43][90][91] RET proto-oncogene,[92][93] PLCG1,[94][95][96] TrkA,[97][98] PRKAR1A,[66] Janus kinase 2,[99][100] MUC1,[101] CD117,[78][102][103] Fas ligand,[104][105] Janus kinase 1,[100][106] VAV3,[53][107] BCAR1,[73][108] PTPN1,[109][110] INPP5D,[111] ITK,[112][113] SHC1,[51][53][114][115][116][117][118][119][120][121][122][123][124][125][126][127][128][129][130][131][132] PTPN12,[133] C-Met,[134][135] PTPN11,[71][85][127][136][137][138][139][140][141] Glycoprotein 130,[61] PTPN6,[51][136][142] Syk,[51][136] MAP4K1,[143][144][145][146] Wiskott-Aldrich syndrome protein,[147][148] NCKIPSD,[149][150] PTPRA,[151][152][153] BCR gene,[12][115][154][155][156][157] CBLB,[158][159][160] Cbl gene,[9][24][51][90][124][158][161][162][163][164][165][166][167] SOS1,[8][24][42][43][48][51][53][60][68][90][95][101][115][122][124][131][168][169][170][171][172] IRS1,[100][114][173] TNK2,[116][174] MED28,[175] MAP3K1[176] and HNRNPC.[177]
IN OTHER NEWS

*USE OF GM-CSF BOOSTS IPILIMUMAB ACTIVITY! GO FIGURE THAT...
*NO SURPRISE HERE, CLASSIII BETA-TUBULIN PREDICT GOOD RESPONSE TO TAXANE IN ER NEGATIVE BREAST CANCER 
*MAKES PERFECT SENSE TO TINKLE WITH ANDROGEN RECEPTOR IN APOCRINE SUBTYPE OF CANCERS
*ONE GOOD NEGATIVE STUDY! OR IS IT? SEND COMMENTs!

Bevacizumab and erlotinib in previously untreated inoperable and metastatic hepatocellular carcinoma
American Journal of Clinical Oncology, 05/29/2013  Clinical Article

Govindarajan R et al. – The 28% progression-free survival rate at 27 weeks was not significantly higher than the recent historical control rate of 20% observed on the placebo arm of the Sorafenib Hepatocellular Carcinoma Assessment Randomized Protocol trial (P=0.28). The combination of bevacizumab and erlotinib does not appear to have sufficient efficacy in patients with unresectable and metastatic HCC not amenable to local therapy.
FROM PRACTICE UPDATE, ASCO NEWS

CONFERENCE NEWS
Ganetespib Trial Hints at Survival Benefit in Lung Adenocarcinoma
IMNG Medical Media, 2013 Jun 04, N Osterweil
Selumetinib is First Therapy to Shrink Uveal Melanomas
IMNG Medical Media, 2013 Jun 03, MJM Dales
Sorafenib Emerges as Option for Advanced Thyroid Cancer
IMNG Medical Media, 2013 Jun 03, P Wendling
Bevacizumab Plus Irinotecan Beats Temozolomide in Stalling Glioblastoma
IMNG Medical Media, 2013 Jun 02, N Osterweil
Cervical Cancer Screening With Acetic Acid Saves Lives
IMNG Medical Media, 2013 Jun 02, S London
Nivolumab Activity is Durable in Advanced Melanoma
IMNG Medical Media, 2013 Jun 02, MJ Dales
Oral HPV-related Cancer Risk Not Transmitted to Sex Partners
IMNG Medical Media, 2013 Jun 01, N Osterweil

Tuesday, June 4, 2013

HUGE NEWS FROM MEDSCAPE!  PRACTICE CHANGING! IN ALL FAIRNESS GO TO MEDSCAPE FOR A FULL REPORT!

"Medscape Medical News from the:

This coverage is not sanctioned by, nor a part of, the American Society of Clinical Oncology.

Stop Using Calcium and Magnesium With Oxaliplatin

Zosia Chustecka
Jun 03, 2013
 
CHICAGO, Illinois — The common practice of administering intravenous calcium and magnesium along with oxaliplatin to reduce the side effect of neuropathy should be stopped, experts say.
The first placebo-randomized phase 3 trial of this practice has shown no benefit. The results were presented here at the 2013 Annual Meeting of the American Society of Clinical Oncology (ASCO®) by Charles Loprinzi, MD, from the Mayo Clinic in Rochester, Minnesota.
The trial was conducted in 353 patients with colon cancer undergoing adjuvant therapy with FOLFOX (5-fluorouracil, oxaliplatin, and leucovorin), who were randomized to receive intravenous CaMg (1g calcium gluconate, 1 mg magnesium sulfate) or placebo before and after oxaliplatin. There was also a third arm in the trial, in which patients received CaMg before and placebo after the oxaliplatin.
The results showed no differences between the groups in either acute neurotoxicity or cumulative sensory neurotoxicity, as assessed both by patient and physician questionnaires."
EVIDENCES MOUNT THAT UNIVERSITIES ARE COMING TOGETHER TO TAKE ALL THE MONEY FOR CANCER RESEARCH

READ FOR YOUR SELF!

BIG CANCER RESEARCH CONSORTIUM (from ONCOLOGY TIMES)

CHICAGO – In a new venture, 11 university-based matrix cancer centers are uniting “to transform cancer research through collaborative oncology trials that leverage the scientific and clinical expertise of the Big Ten universities.”

The consortium will allow universities with similar missions, visions, and cultures to create a regional cancer team science initiative to advance research by sharing resources and strengths to form what is hoped will be a lean, efficient, and collaborative effort that will focus on Phase 0 to II clinical trials accruing patients with specific diseases and molecular characteristics.

The news releases sent out on Friday by the individual institutions all had the same information but included no clear direction as to who was the designated point person or spokesperson, which was perhaps in deference to the consortium’s sensitivity to having any one institution overshadow the others.

However, the mention toward the end of the release that the Indianapolis-based Hoosier Oncology Group (HOG) would serve as the administrative headquarters for the Big Ten Cancer Research Consortium (BTCRC) provided a clue that Indiana University’s Melvin and Bren Simon Cancer Center might be a good place to start.

It was, and since the official kickoff of the initiative was slated for June 1 during the time of the American Society of Clinical Oncology’s Annual Meeting in Chicago, I met with Simon Cancer Center Director Patrick J. Loehrer Sr., MD. He explained that part of the impetus for the initiative was related to helping save the “endangered species of assistant professors,” who under current circumstances might have to wait for years to lead a clinical trial through the cooperative group mechanism.

“I remember when I had finished my medical oncology fellowship at Indiana and was a newly minted medical oncologist eager to get involved in clinical trials,” he said, adding that he was dismayed by the limited opportunities.

In 1984, following discussions with Larry Einhorn, MD, and others at Indiana, Loehrer helped establish the Hoosier Oncology Group, aka, the HOG, as it is affectionately called by proud citizens of the Hoosier State, which was modeled to involve more community oncologists in clinical trials.

He said there was originally some resistance from oncologists concerned about losing patients to academic cancer centers, but that the HOG was designed so patients could be treated the same way in their hometowns.

According to Loehrer, every HOG study had co-chairs from both the community and academic centers, and community oncologists were selected to deliver ASCO presentations.

“These were non-NCI funded trials and community oncologists got involved in the whole process.  It was wonderful,” he said, adding that over subsequent years it became more difficult to secure industry funding for clinical trials, and that BTCRC studies will need at least three institutions involved, with one of the principal investigators being a junior faculty member.

So when Steven T. Rosen, MD, Director of the Robert H. Lurie Comprehensive Cancer Center at Northwestern University, suggested in 2011 using the Big Ten’s athletic conference model to bring cancer centers together, the idea resonated with Loehrer and other cancer center directors.

Within a few months the HOG was selected as BTCRC administrative headquarters and by July 2012, 10 cancer centers were committed to participating in the consortium (with an 11th joining later), and a steering committee was formed. Noah Hahn, MD, Associate Professor of Medicine at Indiana University’s Simon Cancer Center and Chief Medical and Scientific Officer with HOG, was named interim Executive Officer of the Big Ten cancer consortium.

HOG, Loehrer said, will serve strictly in a contract research organization (CRO) capacity, providing comprehensive study management and support, and benefits for consortium members including:
  • A single, common contract for all institutions;
  • A planned streamlined IRB review consolidation;
  • Organized clinical trial working groups;
  • Sharing specimens with clinically annotated data;
  • Development of junior faculty; and
  • The opportunity to open trials faster among member institutions.
The venture will also be limited to members of the Big Ten, Loehrer said, and currently includes:
•           Indiana University (Indiana University Melvin and Bren Simon Cancer Center);
•           Northwestern University (Robert H. Lurie Comprehensive Cancer Center);
•           Penn State University (Penn State Hershey Cancer Institute);
•           Purdue University (Purdue University Center for Cancer Research;
•           Rutgers University (the Cancer Institute of New Jersey becomes part of Rutgers on July 1, but Rutgers doesn’t officially join the Big Ten athletic conference until next year);
•           University of Illinois (University of Illinois Cancer Center) ;
•           University of Iowa (Holden Comprehensive Cancer Center);
•           University of Michigan (University of Michigan Comprehensive Cancer Center);
•           University of Minnesota (Masonic Cancer Center);
•           University of Nebraska (Fred & Pamela Buffett Cancer Center); and
•           University of Wisconsin (Carbone Comprehensive Cancer Center).

When I first saw the list, Ohio State University’s James Cancer Hospital and Solove Research Institute seemed conspicuous by its absence. I called center head Michael A. Caligiuri, MD (a member of OT’s Editorial Board), who said that OSU had been asked to join, but was “currently involved in another endeavor that precludes participating at this time.” He did not disclose the nature of that endeavor.

Cross-referencing the cancer Big Ten with its athletic counterpart, I also noticed the absence of Michigan State University’s Breslin Cancer Center, and noted that the University of Maryland was slated to join the athletic conference in 2014 at the same time as Rutgers, but its Greenebaum Cancer Center was not yet on the list.

Loehrer said that all Big Ten members current and future had been asked to join the cancer consortium and the 11 institutions listed above had committed to joining, with each agreeing to pay $14,000 a year over a proposed three-year period to cover infrastructure costs. He also acknowledged that this was a work in progress and that more specific directions would be developed over time.

At the June 1 kick-off event I spoke with Chandra Belani, MD, who represents Penn State University’s Hershey Cancer Institute on the BTCRC steering committee. Belani shared Loehrer’s excitement about the consortium, and the prospect of developing more early phase trials that would also help train the next generation of physician-scientists.

He also talked about the idea of using the Big Ten’s athletic infrastructure to increase awareness about cancer research and clinical trials and the potential of raising funds through small contributions by the thousands of fans attending Big Ten sporting events.

This model, similar to Stand Up To Cancer’s relationship with Major League Baseball, may prove an additional avenue to provide outreach and awareness about cancer research and clinical trials to yet another major grassroots demographic group. 
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YOU GOT IT RIGHT, YOU PAY $14,000 TO "I DON'T KNOW WHO" AND GET ADMITTED TO THIS CLOSE LEAGUE, WHERE IS THE SUPREME COURT ON THIS! AND WE KNOW WHAT HAPPENED IN TEXAS WITH CPRIT! IF YOU DON'T GET IT, WELL YOU DON'T GET IT!