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Megan Goldman

Researchers Identify Genetic Profile That Predicts Cancer Survival After Chemotherapy ... - 0 views

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    Researchers have identified a biomarker, an eight gene "signature" (a group of genes in a cell whose combined expression is uniquely characteristic of a medical condition), that predicts how long cancer patients might survive without relapse after undergoing chemotherapy. They found that this eight gene signature show a strong correlation to an elevated response to five chemotherapy agents, and showed a lower risk of recurrence and longer relapse-free survival.
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    Curious if this eight gene signature is a result of the genetics of our cell (and resultant interactions) or if it entirely up to the cancerous agent? In simpler terms, are we genetically prone to this eight gene signature or is it luck that our cancer results in this eight gene signature?
Megan Goldman

Frontiers | Who possesses drug resistance genes in the aquatic environment?: sulfametho... - 0 views

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    Frontiers | Who possesses drug resistance genes in the aquatic environment?: sulfamethoxazole (SMX) resistance genes among the bacterial community in water environment of Metro-Manila, Philippines | Frontiers in Antimicrobials, Resistance and Chemotherapy publishes articles on the most outstanding discoveries across the research spectrum of Frontiers | Who possesses drug resistance genes in the aquatic environment?: sulfamethoxazole (SMX) resistance genes among the bacterial community in water environment of Metro-Manila, Philippines | Antimicrobials, Resistance and Chemotherapy.
Casey Finnerty

The Virus That Learns - Phenomena: The Loom - 0 views

  • Likewise, restriction enzymes are a dangerous defense, because they can chop up the distinctive stretches of DNA in a bacterium’s own genes. It avoids attacking itself by capping those sequences in its own DNA, so that the restriction enzymes can’t reach them.
  • Some species can muck up the production of new viruses, stealing their proteins before they can form shells. Others commit suicide upon infection, so as to avoid becoming an incubator for new viruses that would then kill their nearby relatives.
  • CRISPR genes can produce RNA molecules with a matching sequence. They grab onto the virus’s RNA and prevent them from being turned into proteins. The virus factory grinds to a halt.
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  • The bacteria hold onto an invading virus’s DNA, so that they are now prepared for a fresh attack. And over time, bacteria can build up little libraries of these virus barcodes. 
  • Last year, scientists at Indiana University surveyed the bacteria in people’s mouths and discovered 8,000 different viral barcodes–many of them corresponding to viruses scientists have yet to discover.
  • But if you build up a healthy store of antibodies to various strains of flu, smallpox, and other diseases, all that knowledge dies with you.
  • Not so for bacteria. When a microbe reproduces, it passes down its CRISPR genes and all of their viral barcodes to its descendants–including the ones it acquired in its own lifetime.
  • Last fall, for example, University of Cambridge scientists discovered viruses that carry an antidote for the suicide toxin made by their hosts. When the bacteria want to die, the virus forces them to live on. And just last month, University of Toronto scientists even discovered anti-CRISPR genes in viruses, which the viruses use to shut down the production of virus-killing molecules.
  • the scientists demonstrated that the ICP1 virus uses its CRISPR immune system to attack its host’s virus-attacking genes.
Elijah Velasquez

New insights into how genes turn on and off - 0 views

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    Genetics Researchers at UC Davis and the University of British Columbia have shed new light on methylation, a critical process that helps control how genes are expressed. Working with placentas, the team discovered that 37 percent of the placental genome has regions of lower methylation, called partially methylated domains (PMDs), in which gene expression is turned off. Studying of the placenta is particularly interesting because the placenta has invasive characteristics associated with cancer. Increasing our knowledge about PMDs can help determine which genes are silenced and where specific DNA originated.
Katelyn Madigan

Discovery of wound-healing genes in flies could mitigate human skin ailments - 0 views

  • key to their technique was the use of trypsin, a member of a family of enzymes called serine proteases, which activates genes involved in wound healing
  • incorporating specific, regulated series proteases and antimicrobial peptides at the sites of diabetic ulcers or skin grafts for more efficient wound healing
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    A specific approach to target the genes that are involved in wound healing seems like a progressive approach for several skin disorders.
Nate Scheibe

Alga borrows genes to beat the heat, acid and toxic metals | Life | Science News - 0 views

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    This is an interesting article about eukaryotes engaging in gene transfer with bacteria and archaea to survive in extreme environments.
Alletia DeMartino

One-two punch could be key in treating blindness - 0 views

  • Researchers have discovered that using two kinds of therapy in tandem may be a knockout combo against inherited disorders that cause blindnes
  • In 2010, they restored day vision in dogs suffering from achromatopsia, an inherited form of total color blindness, by replacing the mutant gene associated with the condition.
  • While that treatment was effective for most younger dogs, it didn't work for canines older than 1 year
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  • "Gene therapy only works if the nonfunctional cell that is primarily affected by the disease is not too degenerated,"
  • To test their theory, they again performed gene therapy but first gave some of the dogs a dose of a protein called CNTF
  • At a high enough dose, its effect on photoreceptors is a bit like pruning flowers: It partially destroys them, but allows for new growth.
  • But it worked.
  • "All seven dogs that got the combination treatment responded, regardless of age.
  • Those disorders affect individuals of both species in much the same way, so the combination treatment's promise isn't just for Fido.
  • One treatment option alone might not be enough to reverse vision loss, but a combination therapy can maximize therapeutic success."
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    This is so amazing. Definitely interesting that they used dogs which are more complex than rats or mice so if they could use these on people it would definitely change the way the world saw animal testing/research....pun intended haha! pretty cool quick read
Richard Herron

Viruses Can Have Immune System, Study Finds | Biology | Sci-News.com - 1 views

  • A new research led by Dr Kimberley Seed from the Tufts University School of Medicine provides the first evidence that bacteriophages – viruses that infect and replicate within bacteria – can acquire a wholly functional and adaptive immune system.
  • The study, published today in the journal Nature, finds that a viral predator of the cholera bacteria can steal the functional immune system of bacteria and use it against its bacterial host.
  • Developing phage therapy is particularly important because some bacteria, called superbugs, are resistant to most or all current antibiotics.
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  • This study focused on a phage that attacks Vibrio cholerae, the bacterium responsible for cholera epidemics in humans.
  • Finding a CRISPR/Cas system in a phage shows that there is gene flow between the phage and bacteria even for something as large and complex as the genes for an adaptive immune system,”
Whitney Hopfauf

Gene data show China bird flu mutated 'under the radar' | Fox News - 0 views

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    This is so scary. It is only a matter of time before bird flu is able to spread to humans....
Casey Finnerty

"I Think I've Just Thought Up Something Important"-Francois Jacob (1920-2013) - Phenome... - 0 views

  • “I think I’ve just thought up something important,”
    • Casey Finnerty
       
      I love this.
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    Obituary for one of the discoverers of gene regulation.
Amy Jorgenson

Signal transducer and activator of transcription 1 (STAT1) gain-of-function mutations a... - 0 views

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    This paper does an excellent job researching the correlation of the methylation of the STAT-1 gene and genetic mutations in coccidiodiomycosis and histoplasmosis. The paper shows evidence of the methylation of the STAT-1 by the PIAS1 protein. This gene mutation immunologically challenges the IFN-γ and alters the body's defense mechanisms. Excellent paper on a very scary disease. Hopeful for a vaccine!!! 
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    This article was used as a resource for our presentation. This is the article where we obtained the information regarding the patient case studies.
Casey Finnerty

Resistance to the Antibiotic of Last Resort Is Silently Spreading - The Atlantic - 0 views

  • farmers started using it by the tons in animals, where low doses of antibiotics can promote growth.
  • November 18, 2015, scientists published a report in the British medical journal The Lancet: A single, easily spreadable gene makes the bacteria that carry it resistant to colistin, our antibiotic of last resort.
  • Chinese scientists had found this gene, called mcr-1, in pig farms and on meat in supermarkets.
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  • By the time anyone had figured out mcr-1’s existence, it had already spread around the world.  
Nate Scheibe

Resistance to last-line antibiotic makes bacteria resistant to immune system - 0 views

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    An interesting article on cross-resistance.
Casey Finnerty

Molecule in meat may increase heart disease risk | Genes & Cells | Science News - 3 views

  • Hazen’s group also found that blood levels of TMAO and L-carnitine could predict heart disease risk, which they learned by collecting blood samples from 2,595 patients and tracking their health for three years.
    • Casey Finnerty
       
      That is a fairly large sample size and long term study.
  • Molecules proposed as biomarkers for heart disease often look promising in initial studies but fizzle out clinically. “We’ve been down this road so many times before.”
    • Casey Finnerty
       
      Very true.
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    This is an interesting story on how the microbiota of our gut may play an indirect role in cardiovascular disease.
Jenna Veldhuizen

Fighting disease from within the mosquito: New techniques to help halt the spread of di... - 0 views

  • When infected with the bacteria Wolbachia, mosquitoes are unable to spread viruses such as dengue
  • by introducing an insecticide resistance gene alongside the Wolbachia bacteria into the mosquito, that the insects pass on the disease-blocking bacteria to other mosquitoes faster
  • Our results show that Wolbachia-based strategies could hold the key to a cheap and sustainable approach to disease control
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    This in an interesting application in slowing the spread of diseases such as dengue and yellow fever, but one also has to wonder what this will do to the mosquito population as it reduces the mosquito's ability to lay viable eggs. How controlled will this application be and how often will it be utilized?
Megan Goldman

BMC Microbiology | Full text | Molecular characterization of multiresistant E... - 0 views

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    The prevalence and type of plasmids, resistance genes and integrons carried by two collections of multiresistant E. coli producing or not extended-spectrum β-lactamases have been compared. Rep-PCR was used to determine the clonal relationship of the organisms. Plasmids were classified according to their incompatibility.
Megan Goldman

A framework for human microbiome research : Nature : Nature Publishing Group - 0 views

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    A variety of microbial communities and their genes (the microbiome) exist throughout the human body, with fundamental roles in human health and disease. The National Institutes of Health (NIH)-funded Human Microbiome Project Consortium has established a population-scale framework to develop metagenomic protocols, resulting in a broad range of quality-controlled resources and data including standardized methods for creating, processing and interpreting distinct types of high-throughput metagenomic data available to the scientific community. An ambitious article found in another article I enjoyed reading. Was incredibly interested to find out that the vaginal microbiota of pregnant women was significantly different from non-pregnant and to find that these microbiota are preparing the soon to be born baby with it's own microbiota!! (http://www.nytimes.com/2012/06/19/science/studies-of-human-microbiome-yield-new-insights.html?ref=microbiology)
Katelyn Madigan

The RNA Helicase Lgp2 Inhibits TLR-Independent Sensing of Viral Replication by Retinoic... - 0 views

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    Supplemental paper for presentation.
Alletia DeMartino

Genes show one big European family - 0 views

  • to a new study of the DNA of people from across the continent.
  • This was predicted in theory over a decade ago, and we now have concrete evidence from DNA data,
  • But even a pair of individuals who live as far apart as the United Kingdom and Turkey -- a distance of some 2,000 miles -- likely are related to all of one another's ancestors from a thousand years ago.
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  • Ralph and Coop used ideas about the expected amount of genome shared between relatives of varying degrees of relatedness
  • Ralph and Coop looked for shorter blocks of DNA that were shared between cousins separated by many more generations
  • But in large samples, rare cases of distant sharing could be detected. With their analysis, Coop and Ralph were able to detect these shared blocks of DNA in individuals spread across Europe, and calculate how long ago they shared an ancestor.
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    kind of creepy to think about....
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