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jiyoung yoon

Genomic Characterization of a Novel Virus of the Family Tymoviridae Isolated from Mosqu... - 3 views

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    in this article we can know about unique novel tymoviridae virus. they are characterising about this new virus. one of the most unique feature about them is they can replicate even in mosquitoes!in consider that no mosquitoes have been reported as vectores of plant viruse,this research is quite suprising thing! but something i want to recommend is ...first At the result, it said cell lysates did not react with antisera to known only a few arboviruses of the genera. And said this virus is an uncommon arbovirus . I think the author should define more specially about the subject. and second, this research said that CuTLV virus may be transferred to male mosquitoes feed on plant juices and can started to replicate in the insect also. Because marifviruses can potentially replicate both in plants and in insects but, I can't figure out how this viruse can move into human,(animal) different kinds of species , can make a disease even by male ! I think the writer should more explain about that route. the last thing is There is many pictures .but some of them ,like figure 4&figure 5, are too massy to be hard recognized or unneeded thing. So I think they need more arrangement about picture.
Haram LEE

BMC Cancer | Full text | Oncolytic Targeting of Androgen-sensitive Prostate Tumor by th... - 4 views

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    Oncolytic virotherapy for cancer treatment utilizes viruses for selective infection and death of cancer cells without any adverse effect on normal cells. We previously reported that the human respiratory syncytial virus (RSV) is a novel oncolytic virus against androgen-independent PC-3 human prostate cancer cells.
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    Is there any other virus can using for Oncolytic virotherapy? - Oncolytic viruses identified to date are: adenovirus, reovirus, herpes simplex virus (HSV), Newcastle disease virus (NDV), vaccinia virus, myxoma virus, influenza virus, measles virus, coxsackievirus and vesicular stomatitis virus (VSV) (Anticancer oncolytic activity of respiratory syncytial virus., http://www.ncbi.nlm.nih.gov/pubmed?term=Anti-cancer%20oncolytic%20activity%20of%20respiratory%20syncytial%20virus)
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    Why also using xenograft, not only for cell-culture method? - A human prostate tumor xenograft model (30) was used to examine the oncolytic function of RSV in vivo (Figure 2). -We also investigated the efficacy of intraperitoneally (I.P) delivered RSV for causing tumor regression and determined that intraperitoneally injected RSV also rendered significant reduction in the tumor growth compared to the growth of control, medium-treated tumors (Figure 2c). The significant tumor regression by intraperitoneally delivered RSV is shown in Figure 2d. Similar results were obtained with tumors grown in the dorsal flank (Supplementary Figure S2). Therefore, the RSV-responsive restriction of tumor growth at two sites (ear and flank) demonstrates the versatility of RSV in conferring oncolysis in vivo at different anatomical regions. (Anticancer oncolytic activity of respiratory syncytial virus., http://www.ncbi.nlm.nih.gov/pubmed?term=Anti-cancer%20oncolytic%20activity%20of%20respiratory%20syncytial%20virus)
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    How Oncolytic virus control the inflammation? - Oncolytic virus treatment induced at least a twofold increase or decrease in the expression of 50 genes relative to expression in the PBS-treated tumors (Supplementary Table 1, available online). Of these 50 genes, 48 displayed an increase in expression in the oncolytic virus - treated tumors compared with the controltreated tumors, suggesting that oncolytic virus treatment induced an inflammatory response - To confirm the role of the immune response in oncolytic virus - induced vascular hyperpermeability, we evaluated changes in oncolytic virus - induced vascular leakage in tumor-bearing rats that had been treated with cyclophosphamide before oncolytic virus injection. In addition to its immunosuppressive effects, cyclophosphamide blocks infl ammation and reduces viral clearance, both of which increase the propagation of oncolytic viruses, thereby enhancing therapeutic effi cacy of oncolytic viruses. (Effect of Tumor Microenvironment Modulation on the Efficacy of Oncolytic Virus Therapy, http://www.ncbi.nlm.nih.gov/pubmed?term=Effect%20of%20Tumor%20Microenvironment%20Modulation%20on%20the%20Efficacy%20of%20Oncolytic%20Virus%20Therapy)
Casey Finnerty

Flu shot time? Google Flu Trends predicts worst season on record. - Slate Magazine - 0 views

  • If you ask the Centers for Disease Control and Prevention in Atlanta, this year’s flu season is looking “moderately severe.”
  • if you ask Google Flu Trends, we’re in the midst of an outbreak that is shaping up to be the most extensive on record.
  • CDC still drives the bulk of national media coverage
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  • The CDC’s current estimates aren’t all that current.
  • the numbers can tell us only how many people were suffering from the flu a couple weeks ago.
  • scans millions of Google searches from around the world to track flu activity in near real time.
  • CDC outpatient surveillance figure of an unprecedented 8.9 percent.
  • “Is it going to be a more severe season than last year? I think without question,” Jhung said. “Is it going to be a more severe season than a couple years ago, or the previous 10 years? We don’t know, and won’t know until the end of the season.”
  • the dominant strain so far this year is H3N2, not the novel “swine flu” strain of H1N1 that spooked the world.
  • the figure to which Google Flu Trends corresponds is the one that tells us what percentage of outpatient doctor visits are flu-related at the institutions in the CDC’s reporting network. But a separate PLOS One study from 2011 found that it doesn’t correlate quite as well with another CDC metric that’s based on the number of laboratory-confirmed cases of the flu.
Matthew Marshall

PLOS ONE: Broad-Spectrum Antiviral Therapeutics - 0 views

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    This team's antiviral has the ability to recognize and induce apoptosis in cells containing viral double stranded RNA (dsRNA). So, they can kill cells containing up to 15 different types of viruses, including Dengue Fever and H1N1 Influenza, while leaving uninfected cells alone.........A-MAZING!
Trevor F

Unique molecular signatures of disease brain endothelia provide a novel site for CNS-di... - 5 views

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    Great paper for introductory look at adapting adeno-associated viruses (AAV) to different cell tropisms.  Although the scope of this article is the CNS, and more specifically the brain.  Also goes over how brain vasculature expresses different characteristics in disease states that allows for specification of AAVs to have tropism for the diseased epithelial beds.
sdahlseng10

Production and purification of lentiviral vectors generated in 293T suspens... - 6 views

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    Focus Article; Journal club 1:This is an article that details a novel technique for production of HIV (lentiviral) vectors for use as tools of gene therapy. The fascinating approach that was developed by the authors uses baculovirus as a vector to infect human embryonic kidney cells in culture with the genes necessary to produce a lentiviral vector with therapeutic capabilities.
Casey Finnerty

Research - A Neuro-Oncology Laboratory at Northwestern University in Chicago - 1 views

  • Most adenoviruses that have been historically used for gene therapy have been based on serotype 5 (AdWT). Unfortunately, expression of the primary receptor for Ad5 (the coxsackie-adenovirus receptor, CAR) is highly variable on cancer cells. In fact, several studies have demonstrated a resistance of malignant glioma to adenoviral vectors, a finding that was subsequently attributed to the quantitative deficiency of CAR on brain tumor cells.
  • First, we tested a variety of tumor specific promoters and identified survivin (S) as an excellent tumor specific promoter for transcriptional control of E1a, a gene essential for CRAd replication (J Neurosurg 104:583, 2006; Cancer Biol Ther 6:679, 2007).
  • Based on the above date data, we then created a novel oncolytic adenoviral vector which utilizes the survivin promoter and binds to heparan sulfate proteoglycans expressed on malignant brain tumors and named this new vector CRAd-S-pk7 (Hum Gene Ther 18:589, 2007).
    • Casey Finnerty
       
      How specific is the binding/tropism? HS is fairly widespread throughout the body.
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  • Second, we have identified several receptors that are over-expressed on brain tumor cells and created a series of pseudotyped Ad5 vectors that recognize these receptors
  • Our studies with CRAd-S-pk7 indicate that the virus provides the highest level of viral replication and tumor oncolysis in glioma cell lines. At the same time, we observed minimal viral replication and toxicity in normal human brain. Injection of CRAd-S-pk7 inhibited xenograft brain tumor growth by more than 300%.
  • We were the first group in the country to show that human mesenchymal stem cells can be effectively loaded with a replication competent virus and effectively deliver it to an experimental glioma model
  • When oncolytic vectors are loaded onto stem cells, the virus effectively "hides" from the immune system for an extended period of time. The ability of stem cells to suppress the anti-viral immune response in a permissive and tumor-bearing animal model is the subject of one of our latest manuscript
  • Finally, to further enhance the therapeutic efficacy of stem cells, we have optimized them to specifically traffic to intracranial tumors via genetic modification with single-chain antibodies against antigens expressed on gliomas
  • Our latest work in this area supports the development of neural stem cell based cell carriers for oncolytic virotherapy
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