Menu

Blog

Archive for the ‘biotech/medical’ category: Page 2114

Dec 4, 2018

Natural selection in the womb can explain health problems in adulthood

Posted by in categories: biotech/medical, health

Conditions encountered in the womb — when the embryo consists of only about 100 cells — can have life-long impact on health. Scientists previously assumed that this is because embryos respond to adverse conditions by programming their gene expression. Now an international team of researchers at the Leiden University Medical Center, Wageningen University and Research, Lund University, Columbia University Mailman School of Public Health in New York propose a radically different alternative. Rather than being programmed by the environment, random differences in gene expression may provide some embryos with a survival advantage, in particular when conditions are harsh. By studying DNA methylation, an important mechanism to control gene activity, the researchers found that a specific part of the DNA methylation pattern was missing among famine-exposed individuals. The findings are published in the journal Cell Reports.

Read more

Dec 4, 2018

Blood test to detect cancer within just 10 minutes developed by scientists

Posted by in categories: biotech/medical, genetics

A blood test can detect cancer within just 10 minutes, scientists have found, raising hopes that hard-to-spot diseases could be picked up early when treatment is most effective.

Currently doctors use symptoms and a raft of tests and biopsies to determine if cancer is present which can sometimes take months.

The new method from the University of Queensland looks for differences in the genetic code of cancerous and healthy cells.

Continue reading “Blood test to detect cancer within just 10 minutes developed by scientists” »

Dec 4, 2018

Reverse Brain Death with Stem Cells

Posted by in categories: biotech/medical, neuroscience

Who isn’t interested in new ways to apply stem cell therapy these days?

Speaking of, have you heard about the scientists in Philadelphia, PA, who have been injecting stem cells directly into the spinal cords of medically brain-dead people in order to revive them?

In a page taken from Mary Shelley’s Frankenstein, the idea of “bringing people back from the dead” is a little too much like “playing God” for some critics to appreciate.

Continue reading “Reverse Brain Death with Stem Cells” »

Dec 4, 2018

“Is curing patients a sustainable business model?” Goldman Sachs analysts ask

Posted by in categories: bioengineering, biotech/medical, business, genetics, sustainability

Analyst Salveen Richter and colleagues laid it out:

The potential to deliver “one shot cures” is one of the most attractive aspects of gene therapy, genetically engineered cell therapy, and gene editing. However, such treatments offer a very different outlook with regard to recurring revenue versus chronic therapies… While this proposition carries tremendous value for patients and society, it could represent a challenge for genome medicine developers looking for sustained cash flow.

For a real-world example, they pointed to Gilead Sciences, which markets treatments for hepatitis C that have cure rates exceeding 90 percent. In 2015, the company’s hepatitis C treatment sales peaked at $12.5 billion. But as more people were cured and there were fewer infected individuals to spread the disease, sales began to languish. Goldman Sachs analysts estimate that the treatments will bring in less than $4 billion this year.

Continue reading “‘Is curing patients a sustainable business model?’ Goldman Sachs analysts ask” »

Dec 4, 2018

Early Puberty Mystery Linked to Family Exposure to Household Chemicals

Posted by in category: biotech/medical

A merican girls are now going through puberty significantly earlier than in decades prior, a trend that’s been linked to physiological and psychological risks. The various factors thought to drive early puberty include obesity, toxic stress, and environmental elements. A landmark study published Monday looks at one particular type of environmental element — the chemicals in household items.

A long-running study on mothers and children published in Human Reproduction determined that the onset of female puberty is associated with exposure to chemicals like phthalates, parabens, and the antibacterial agent triclosan. These products in personal care products, like some brands of perfumes, cosmetics, and toothpaste. The same result was not found in populations of boys, whose timing of puberty was also examined in this study.

“We have known for the past 15 to 20 years that girls are entering puberty at an earlier age than they used to in the past,” lead author and University of California, Berkeley associate professor Kim Harley, Ph.D. tells Inverse. “We certainly know that obesity plays a role in that but now we also know that the hormone-disrupting chemicals that are in our homes and in our environment could be an additional factor that’s contributing to this.”

Continue reading “Early Puberty Mystery Linked to Family Exposure to Household Chemicals” »

Dec 4, 2018

Two experimental cancer drugs team up after unexpected discovery

Posted by in category: biotech/medical

Researchers at MIT have used two experimental cancer drugs in tandem to fight melanomas. The team paired protein kinase inhibitors with ribonuclease drugs and set them loose onto tumors, and found that the combination worked better than either drug does alone. The discovery could help reduce side effects of cancer treatments and make them more effective.

Read more

Dec 4, 2018

World-first electrical stimulation device blazes a new trail into the brain

Posted by in categories: biotech/medical, neuroscience

Open brain surgery is about as dangerous as it sounds, but for sufferers of conditions like Parkinson’s and epilepsy it can be the only way to relieve their symptoms. Unfortunately, this means drilling a hole in the skull and stimulating the brain with electrical currents, bringing on the risk of serious side effects. Fortunately, scientists have opened a new doorway to the brain, developing the Stentrode, a promising first-of-a-kind device that can deliver the currents to targeted areas through a small keyhole incision in the neck.

Read more

Dec 4, 2018

The US Military Is Genetically Engineering New Life Forms To Detect Enemy Subs

Posted by in categories: bioengineering, biotech/medical, genetics, military

The Pentagon is also looking at living camouflage, self-healing paint, and a variety of other applications of engineered organisms, but the basic science remains a challenge.

How do you detect submarines in an expanse as large as the ocean? The U.S. military hopes that common marine microorganisms might be genetically engineered into living tripwires to signal the passage of enemy subs, underwater vessels, or even divers.

It’s one of many potential military applications for so-called engineered organisms, a field that promises living camouflage that reacts to its surroundings to better avoid detection, new drugs and medicines to help deployed forces survive in harsh conditions, and more. But the research is in its very early stages, military officials said.

Continue reading “The US Military Is Genetically Engineering New Life Forms To Detect Enemy Subs” »

Dec 4, 2018

US life expectancy drops again as opioid deaths and suicide rates rise

Posted by in category: biotech/medical

An American born in 2017 is expected to live to be 78.6 years old, according to data from the CDC’s National Center for Health Statistics. That’s one-tenth of a year lower than the previous year, or, put another way, it shaves 1.2 months off the life expectancy of a baby born in 2016. Life expectancy dropped from 2014 to 2015, then held steady in 2016, the CDC said.

The decline is a troubling sign for the United States, which already usually ranks lowest among other wealthy countries for life expectancy.

The top three causes of death, unchanged from previous years, were heart disease, cancer and unintentional injuries. The report attributed the drop in life expectancy to increases in mortality from unintentional injuries, which includes most fatal drug overdoses, among other factors.

Continue reading “US life expectancy drops again as opioid deaths and suicide rates rise” »

Dec 3, 2018

CRISPR has many promising applications—but the gene-edited twins represent something more troubling

Posted by in categories: bioengineering, biotech/medical, genetics

Last week Chinese researchers rocked the world with reports that twin babies whose genes the scientists’ edited prior to birth had been born, the product of secret experiments that are being widely decried as unethical. Even as that story plays out, it is true that CRISPR gene editing is already being used in humans, in ways that illustrate just how unethical this recent use was.

“Patients’ parents have been emailing me a lot,” says Hye Young Lee, a researcher at the University of Texas San Antonio whose work looks at alternative delivery methods for CRISPR. Lee says she normally gets a few emails a month from the parents of the patients she works with, but that the number of emails went up recently—in relation, she suspects, to the news of the CRISPR babies, which is creating the illusion that CRISPR and other gene editing techniques are ready for extensive use in humans.

The scientific community’s current consensus is that they’re far from being at that stage—and it’s impossible to know now when or if they will be. But gene editing is being used in adult humans, to early trials to treat genetic diseases. In terms of gene editing for adults, “I know that there are things going on,” Lee says, but it’s nothing like this week’s news. Although her own work is at least a few years away from being ready for human testing, there are some cautiously progressing trials at drug companies using CRISPR in adult humans who have diseases that are the result on mutations in a single gene.

Read more