Cassandra Willyard in Nature:
Lindsey Abel takes an anaesthetized mouse from a plastic container and lays it on the lab bench. With a syringe, she injects a slurry of pink cancer cells under the skin of the animal’s right flank. These cells once belonged to a person with tongue cancer, a former smoker whose disease recurred despite radiation and surgery. The mouse is the second rodent to harbour them, creating a model for cancer known as a patient-derived xenograft (PDX). The tumour that grows inside will provide cells that can be transferred to more mice. Abel has performed this procedure hundreds of time since she joined Randall Kimple’s lab at the University of Wisconsin–Madison. Kimple, a radiation oncologist, uses PDX mice to carry out experiments on human tumours that would be impractical in people, such as testing new drugs and identifying factors that predict a good response to treatment. His lab has created more than 50 PDX mice since 2011. Kimple’s lab is not the only one doing this; PDX mice have exploded in popularity over the past decade and are beginning to supplant other techniques for modelling cancer in research and drug development, such as mice implanted with cancer cell lines. Because the models use fresh human tumour fragments rather than cells grown in a Petri dish, researchers have long hoped that PDXs would model tumour behaviour more accurately, and perhaps even help to guide treatment decisions for patients. They also allow researchers to explore the vast variety of human tumours. PDXFinder, a catalogue launched earlier this year, lists more than 1,900 types of PDX mouse. But there are many more scurrying around in academic and industry labs — as many as 10,000 PDXs have been created, says Nathalie Conte, a bioinformatician at the European Bioinformatics Institute, in Hinxton, UK, who leads PDXFinder.
PDX models are not perfect, however — and scientists are beginning to recognize their shortcomings and complexities. The tumours can diverge from the original sample, for example, and the models cannot be used to test immunotherapies. Now, biologists are scrutinizing PDX mice and looking for creative ways to cope with the challenges. “Every model is artificial in some way,” says Jeffrey Moscow, head of the investigational drug branch at the National Cancer Institute in Bethesda, Maryland. “The real question is how predictive are these models going to turn out to be.”
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When the European Union slapped Google with a $5 billion antitrust fine recently, President Trump readied his exclamation points,
Lenore Palladino in Boston Review:
In fact, the entire story of the Emperor and his Mausoleum is one of history, mystery, and discovery. History: the chronicles and annals of Chinese history help us to outline the straightforward historical record: this provides the basic starting point of the story. Mystery: since the emperor’s death there have been several mysteries, including the character of the emperor himself, the deliberately disguised location of the tomb, its real purpose and more recently the uncertain role of the terracotta warriors. Discovery: in the past this was serendipitous, as in the 1974 discovery of the warriors, but today it has become systematic and adopts advanced archaeological and scientific techniques which fill out the history and build on the mystery.
Mario Merz, a leading figure of the Italian avant-garde movement Arte Povera, first began to draw in prison, after being arrested in 1945 for his involvement with an anti-Facist group in Turin. He recorded his cell mate’s beard in continuous spirals, often without lifting his pencil off the paper. After his release, he painted leaves, animals and biomorphic shapes in a colourful Expressionist style. It wasn’t until the 1960s, though, that he began creating the three-dimensional works – using everyday objects and materials, such as wood, wool, glass, fruit, umbrellas and newspaper – for which he became famous.
The arts are “a space where we can give dignity to others while interrogating our own circumstances,” said Darren Walker, president of the Ford Foundation, at the Smithsonian’s National Museum of American History’s annual symposium, The Power of Giving: Philanthropy’s Impact on American Life. Held this spring, the program explored philanthropy’s impact on and through culture and the arts. As he reflected on the relationship between giving and the arts, Walker said that “throughout our history, we have seen artists and activists work hand in hand. We have seen art inspire and elevate whole movements for change.” As Walker suggests, music, storytelling, drama, and other arts have an emotional impact that motivates giving time and money to causes, while philanthropic appeals help artists attract audiences. To continue the conversation about the arts and giving, here’s a look at three objects that tell stories about how Americans used the arts to promote social change in the 1800s.
After I came back from Australia, I wondered about a large bauxite mine that I’d heard of, where termites had rehabilitated the land. I wondered if there was more to the story than the fact that they fertilized the soil and recycled the grasses. There seemed to be a gap between bugs dropping a few extra nitrogen molecules in their poo and the creation of a whole forest. What were they doing down there? I started going through my files, looking for people working on landscapes. This led me to the work of a mathematician named Corina Tarnita and an ecologist named Rob Pringle. When I contacted her, Corina had just moved to Princeton from Harvard and, with Rob, had set about using mathematical modeling to figure out what termites were doing in dry landscapes in Kenya. As it happened, I had interviewed Rob back in 2010, when he and a team published a paper on the role of termites in the African savanna ecosystems that are home to elephants and giraffes.
What you see below are images from my notebooks, recently posted on my
IN HIS ARTICLE
It is sometimes said that Surrealist paintings are disappointing up close; perhaps we see them so often in reproduction that by the time we see the real ones in a museum they’ve lost some of their strangeness. René Magritte’s paintings could fall into that trap. His bowler hats, apples, puffy clouds and pipes have popped up on coffee mugs, tote bags and dorm-room posters for decades. Not to mention album covers: Jeff Beck used Magritte’s “The Listening Room” on the cover of his 1969 LP “Beck-Ola”. Is Magritte too ubiquitous to be uncanny? No, is the takeaway from “The Fifth Season”, an exhibition at the San Francisco Museum of Modern Art (SFMOMA). Displaying lesser-known work alongside some of his best-loved paintings, it shows that Magritte still has the power to surprise.
In July 3, 2014, Misty Mayo boarded a Greyhound bus bound for Los Angeles. Desperate to escape her hometown of Modesto in Stanislaus County, 300 miles north in California’s Central Valley, the 41-year-old thought the 4th of July fireworks in LA would be the perfect antidote. Even a mugging at the Modesto bus station didn’t deter her. When she arrived in LA the next morning with just a few dollars in her pocket, Misty immediately asked a police officer for directions to the fireworks display. She also knew she would need to find a Target pharmacy to refill her medication, but decided it could wait until later.
You are now a highly successful public intellectual. In what ways has international recognition changed you?