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bacteria and DNA molecules on a purple background.
Engineering the Microbiome: CRISPR Leads the Way
Mariella Bodemeier Loayza Careaga, PhD | Mar 15, 2024 | 10+ min read
Scientists have genetically modified isolated microbes for decades. Now, using CRISPR, they intend to target entire microbiomes.
Weathering Hantavirus: Ecological Monitoring Provides Predictive Model
Steve Bunk | Jul 4, 1999 | 7 min read
Photo: Steve Bunk Dave Tinnin, field research associate in the University of New Mexico's biology department, takes blood samples and measurements of rodents caught on the research station grounds. At the end of a freeway exit near Soccoro, N.M., the hairpin turn onto a gravel road is marked by a sign that warns, "Wrong Way." But it isn't the wrong way if you want to reach the University of New Mexico's (UNM) long-term ecological research (LTER) station. The sign's subterfuge is the first indi
A fruit bat in the hands of a researcher
How an Early Warning Radar Could Prevent Future Pandemics
Amos Zeeberg, Undark | Feb 27, 2023 | 8 min read
Metagenomic sequencing can help detect unknown pathogens, but its widespread use faces challenges.
The Proteasome: A Powerful Target for Manipulating Protein Levels
John Hines and Craig M. Crews | May 1, 2017 | 10+ min read
The proteasome’s ability to target and degrade specific proteins is proving useful to researchers studying protein function or developing treatments for diseases.
An illustration of green bacteria floating above neutral-colored intestinal villi
The Inside Guide: The Gut Microbiome’s Role in Host Evolution
Catherine Offord | Jul 1, 2021 | 10+ min read
Bacteria that live in the digestive tracts of animals may influence the adaptive trajectories of their hosts.
Master of the Cell
Judy Lieberman | Apr 1, 2010 | 10+ min read
By Judy Lieberman Master of the Cell RNA interference, with its powerful promise of therapy for many diseases, may also act as a master regulator of most—if not all—cellular processes. RNA silencing. Computer artwork showing a length of RNA (yellow with red rings) bound to an RNA-induced silencing complex (RISC). © Medi-Mation Ltd / Photo Researchers, Inc. ne of the biggest surprises in biology in the past d
Methylation: Gene Expression at the Right Place and Right Time
Nadia Halim | Dec 5, 1999 | 7 min read
Courtesy of Richard Roberts, New England BiolabsModel methylation reaction: Cytosine nucleotide (red) is flipped out of the DNA double helix by a methyltransferase (white), so it can be methylated. The end product after the methyl group has been transferred to the DNA is pictured in green. A tenuous link between DNA methylation and development has existed for several years. Now findings substantiate the connection. Researchers have found the first human diseases caused by defects in the DNA meth
African Sleeping Sickness: A Recurring Epidemic
Ricki Lewis | May 12, 2002 | 5 min read
African trypanosomiasis is making an unwelcome comeback. But unlike other returning diseases, this one has a drug treatment—eflornithine—that disappeared from the market when it failed to cure cancer. Yet like Viagra's origin from a curious side effect in a clinical trial, so too was eflornithine reborn. "When it was discovered that it removes mustaches in women, it suddenly had a market: western women with mustaches," says Morten Rostrup, president of the international council for M
A Sharper Image
Bob Sinclair | Apr 29, 2001 | 10+ min read
Medical miracles abound, yet cancer continues to be a complex and challenging problem. "Cancer" is actually a generic, catchall term for the malignant tumors that are found in well over a hundred different diseases, but the basic concept is simple enough--a gene goes wrong and a tumor grows. Unfortunately, the reality is more complicated, involving an intricate sequence of phenomena and interactions in just a handful of the body's tens-of-trillions of cells. And therein lies the problem for rese
Detecting Tumors from Shed DNA
Douglas Steinberg | May 13, 2001 | 7 min read
Medical institutions across the United States will begin recruiting volunteers next month for a study that its investigators and outside observers describe as groundbreaking. They say it is the first large-scale trial to test the feasibility of using DNA shed by tumors to find early-stage cancer. During the three-year government-funded project, researchers will analyze DNA from stool samples to detect patterns characteristic of colorectal cancer (CRC). The study will have two other notable fe

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