Health24.com | Could psoriasis meds fight heart trouble too?

Could the inflammation that drives psoriasis and other immune-linked illnesses be a major player in heart disease?

In a new study, certain psoriasis drugs appeared to help to keep arteries clear, suggesting such a link.

A sixth factor

“Classically a heart attack is caused by one of five risk factors: diabetes, hypertension, high cholesterol, family history or smoking,” explained study lead researcher Dr Nehal Mehta.

“Our study presents evidence that there is a sixth factor, inflammation,” she said.

Mehta heads the Laboratory of Inflammation and Cardiometabolic Diseases at the US National Heart, Lung, and Blood Institute (NHLBI) in Bethesda, Maryland.

Another cardiologist agreed the study could open doors to new research.

“The future of cardiovascular prevention may require a cholesterol reduction medication and an anti-inflammatory medication,” said Dr Guy Mintz, who directs heart health at Northwell Health’s Sandra Atlas Bass Heart Hospital in Manhasset, New York.

“These are exciting times in the area of cardiovascular prevention,” said Mintz, who wasn’t involved with the study.

Reducing fatty plaques

The new study involved 121 patients who had moderate to severe psoriasis and qualified for anti-inflammatory medicines called biologic therapies. These injected medicines are also used by people with immune-linked conditions such as lupus or rheumatoid arthritis, and include drugs such as Cimzia, Enbrel, Humira, Orencia and Remicade, among others.

All of these medicines work by helping to suppress pro-inflammatory immune system activity.

All participants enrolled in the new study were at low risk of heart disease at the beginning of the research.

Over a year of follow-up, the use of biologic therapy was associated with an 8% reduction in coronary artery plaque, the researchers said.

Specifically, use of biologic drugs appeared linked with a slowed build-up of fatty plaques in arteries. These are the plaques that can restrict blood flow and cause heart attacks and stroke.

The findings suggest that immunotherapies that treat inflammatory conditions might also help cut heart disease risk, Mehta and his colleagues reported.

An anti-inflammatory effect

The study authors pointed to prior research that tied psoriasis to the early development of high-risk “soft” arterial plaques. Biologic therapy might cut plaque formation, even in patients without other heart disease risk factors such as high cholesterol, blood sugar and blood pressure, they said.

“This appears to be an anti-inflammatory effect,” Mehta explained in an NHLBI news release. “In the absence of improvement in other cardiovascular risk factors, and without adding new cholesterol medications, patients’ soft plaque still improved.”

However, a cause-and-effect relationship isn’t clear from this type of study, so “the next steps should be randomized, controlled trials,” Mehta said.

Dr Michele Green is a dermatologist who treats psoriasis patients at Lenox Hill Hospital in New York City. She wasn’t involved in the new study, but said, “Treatments with biologics indeed shows great promise in treating cardiovascular disease.”

New research supports hypothesis

As for Mintz, he called the new research “exciting and important, because it highlights the importance of inflammation associated with psoriasis causing blockages in the arteries of the heart to progress.

“The best statin in the world can only lower cardiovascular events by approximately 40%,” Mintz pointed out. “So the question arises, what causes the other 60% of cardiovascular events?”

The new research “supports the hypothesis that inflammation contributes to cardiovascular disease,” he said. “Physicians need to become aware that inflammation should be considered in patient cardiovascular risk assessment.”

The study appears online in the journal Cardiovascular Research.

Image credit: iStock

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Health24.com | How much coffee is OK?

It seems as though every day brings a new study on the merits – or the risks – of coffee. So what’s the real scoop?

If you like drinking coffee simply for the pleasure of it, Harvard University research has found that sipping up to six cups a day is probably safe. Remember: Those are 8-ounce cups with about 100 milligrams of caffeine and little added milk and sweetener. A cafe drink can pack the equivalent of three cups, plus the fat and calories from any add-ins, so tally it accordingly.

And it appears that coffee is not only “safe” to drink, it may also have actual health benefits, like protecting against diabetes, Parkinson’s and certain liver diseases. Coffee drinkers may also have a slightly lower risk of dying from heart disease compared to those who skip the java.

How can a cup o’ joe have such wide-ranging effects? Coffee is much more than caffeine, with hundreds of different compounds, any of which can lead to a positive health outcome.

Got the jitters?

While some studies have found an association between these benefits and drinking moderate amounts of coffee, even heavy coffee drinkers may benefit. A 2018 study published in JAMA Internal Medicine looked at 500 000 people who drank one to eight cups a day. Researchers found that heavy coffee drinking was associated with a lower risk of early death from all causes.

But keep in mind that it’s important to personalise research findings to your own situation. For instance, if you feel jittery during the day or have trouble getting quality sleep, you may be drinking too much coffee. Also, if you’re pregnant or have high blood pressure or diabetes, ask your doctor what’s safe for you.

The bottom line: Expect more coffee research down the road, but for now, for those who like it, there’s no need to think of coffee as an unhealthy habit anymore.

Image credit: iStock

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Health24.com | FDA allows treatment of depression with club drug’s cousin

A mind-altering medication related to the club drug Special K won US approval for patients with hard-to-treat depression, the first in a series of long-overlooked substances being reconsidered for severe forms of mental illness.

The nasal spray from Johnson & Johnson is a chemical cousin of ketamine, which has been used for decades as a powerful anaesthetic to prepare patients for surgery. In the 1990s, the medication was adopted as a party drug by the underground rave culture due to its ability to produce psychedelic, out-of-body experiences. More recently, some doctors have given ketamine to people with depression without formal FDA approval.

Feel-good brain chemical

The Food and Drug Administration approved Spravato as a fast-acting treatment for patients who have failed to find relief with at least two antidepressants. Up to 7.4 million American adults suffer from so-called treatment-resistant depression, which heightens the risk of suicide, hospitalisation and other serious harm, according to the FDA.

The drug will cost between $590 (±R8 380) and $885 (±R12 570) depending on the dosage and before various insurance discounts and rebates.

There have been no major pharmaceutical innovations for depression since the launch of Prozac and related antidepressants in the late 1980s. Those drugs target the feel-good brain chemical serotonin, and can take weeks or months to kick in.

Ketamine and J&J’s version work differently than those drugs, targeting a chemical called glutamate that is thought to restore brain connections that help relieve depression.

When the drug works, its effect is almost immediate. That speed “is a huge thing because depressed patients are very disabled and suffer enormously,” said Dr John Mann, a psychiatrist and researcher at Columbia University. If the drug doesn’t work, physicians can quickly switch to other options, he noted.

The FDA approved Spravato, known chemically as esketamine, based on study results that showed patients taking the drug experienced a bigger improvement in their depression levels than patients taking a sham treatment, when measured with a psychiatric questionnaire.

The drug is designed to be lower-dose and easier to use than ketamine, which is normally given as an intravenous infusion.

‘It’s a strong drug’

Robin Prothro, 60, began taking antidepressants more than 20 years ago. But she says none of the five medications she tried relieved the depression that has stymied her personal and professional life.

Since enrolling in a Spravato trial two years ago, Prothro says her depression has lifted and she’s returned to hobbies she abandoned years ago, like gardening.

She takes the drug every two weeks at her psychiatrist’s office while reclining in a comfortable chair.

“You can feel it coming on, it’s a strong drug,” she said, describing colours and shapes that drift before her eyes. “I just let the drug work. I close my eyes and my mind is amazingly quiet.”

The ketamine-like drug is the first of several psychoactive substances making their way through the US regulatory process as physicians search further afield for new therapies. Researchers are conducting late-stage trials of psilocybin, the active ingredient in magic mushrooms, and MDMA, a euphoria-inducing club drug, as potential treatments for depression and post-traumatic stress disorder.

“Substantially different agents are only rarely appearing from pharmaceutical companies or other laboratories,” said Dr Paul Summergrad, a psychiatrist at Tufts University. “That’s prompting people to investigate other compounds.”

Unlike ketamine, psilocybin and MDMA have no legal medical use. Classified in the same category as heroin and LSD, they are tightly restricted by the federal government. But the FDA’s approval of esketamine could smooth their path.

Abuse potential

Depression is among the leading causes of disability in the US and is being closely monitored by health authorities amid rising suicides nationwide. In 2017, the US suicide rate rose to 14 deaths per 100 000 people, the highest rate in at least 50 years, according to federal records.

Government officials haven’t suggested an explanation for the trend, though academic researchers point to the nation’s widening income gap, financial struggles and divisive politics.

J&J’s drug will be subject to a number of restrictions due to its abuse potential, side effects and lingering safety questions.

The drug will only be given by accredited specialists who must monitor patients for at least two hours after administration, due to its trippy, disorienting effects. Additionally, all patients will be tracked in a registry to monitor long-term safety and effectiveness.

The immediate impact of ketamine is thought to last just four to seven days and there’s no consensus yet on how long patients can benefit from ongoing treatment.

Still, there are few other options for patients who fail to respond to antidepressants. The most effective treatment in such cases, electroshock therapy, requires patients to be fully sedated and can cause persistent memory loss.

Safer and more accessible

Wall Street has high expectations for J&J’s medication, with analysts predicting more than $600 million (±R8.52 billion) in annual sales by 2022. But J&J will face competition in the marketplace.

A decades-old drug, ketamine is already used off-label to treat depression by some doctors. At least 150 clinics around the US provide treatment with various forms of the drug, which is available as a low-cost generic. Patients often pay hundreds or thousands of dollars for intravenous infusions of the drug over several weeks or months. Such therapies are generally not covered by insurance because they haven’t been approved as safe and effective by FDA regulators.

Some doctors plan to offer both ketamine and the new J&J drug.

Dr Steve Levine says having FDA-approved standards for dosing and administering the new drug should raise standards in the field and drive out some of the bad actors who are not qualified to treat depression.

“This is going to bring in some standards, regulation and it’s going to make it safer and more accessible to patients,” said Levine, who serves as vice president of the American Society of Ketamine Physicians, a group representing doctors, nurses and others using ketamine for treating depression or other non-approved uses.

Image credit: iStock

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Cochlear implants to benefit more people with hearing loss

More people in England and Wales with severe hearing loss will be eligible for the devices.

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Satisfaction with NHS ‘hits 11-year low’

The public is concerned about lack of staffing and waiting times, according to a long-running survey.

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HRT: Women told not to be alarmed by Alzheimer’s study

The risk is very low and drugs to treat menopause symptoms are safe and effective, doctors say.

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Ebola in the DR Congo warzone

Violent attacks are making treating the worst Ebola outbreak in the history of DR Congo even harder.

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As sea level rises, wetlands crank up their carbon storage

Some wetlands perform better under pressure. A new study revealed that when faced with sea-level rise, coastal wetlands respond by burying even more carbon in their soils.

Coastal wetlands, which include marshes, mangroves and seagrasses, already store carbon more efficiently than any other natural ecosystem, including forests. The latest study, published March 7 in the journal Nature, looked at how coastal wetlands worldwide react to rising seas and discovered they can rise to the occasion, offering additional protection against climate change.

“Scientists know a fair amount about the carbon stored in our local tidal wetlands, but we didn’t have enough data to see global patterns,” said Pat Megonigal, a co-author and soil scientist at the Smithsonian Environmental Research Center.

To get a global picture, scientists from Australia, China, South Africa and the U.S. pooled data from 345 wetland sites on six continents. They looked at how those wetlands stored carbon for up to 6,000 years and compared whether sea levels rose, fell or stayed mostly the same over the millennia.

For wetlands that had faced rising seas, carbon concentrations doubled or nearly quadrupled in just the top 20 centimeters of soil. When the scientists looked deeper, at 50 to 100 centimeters beneath the surface, the difference hit five to nine times higher.

The extra boost comes because the carbon added to wetland soils by plant growth and sediment is buried faster as wetlands become wetter. Trapped underwater with little to no oxygen, the organic detritus does not decompose and release carbon dioxide as quickly. And the higher the waters rise, the more underwater storage space exists for the carbon to get buried.

North America and Europe faced the most sea-level rise over the past 6,000 years. Melting glaciers from the last ice age caused water levels to rise, increasing coastal flooding. Continents in the southern hemisphere, by contrast, were largely glacier-free and experienced stable or even falling sea levels.

However, the scene is changing now. The steady march of climate change is exposing even wetlands farther south to accelerated sea-level rise.

“They may be the sleeping giants of global carbon sequestration,” said lead author Kerrylee Rogers of the University of Wollongong in Australia. Half of the world’s tidal marshland grows along the coastlines of southern Africa, Australia, China and South America. If those wetlands doubled their carbon sequestration — as other wetlands in the study did in response to sea-level rise — they could sequester another 5 million tons of atmospheric carbon every year. That is the equivalent of taking more than a million cars off the road.

The trick, of course, is to ensure wetlands do not drown and disappear if waters rise too quickly.

“Preservation of coastal wetlands is critical if they are to play a role in sequestering carbon and mitigating climate change,” Rogers said.

For coastal wetlands to survive, they need space to migrate inland. Whether they have enough space depends largely on how societies prioritize many competing goals. One thing is certain: With climate change ramping up, wetlands can protect people in more ways than one, if given enough breathing room.

Story Source:

Materials provided by Smithsonian. Note: Content may be edited for style and length.

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Can entangled qubits be used to probe black holes?

Physicists have used a seven-qubit quantum computer to simulate the scrambling of information inside a black hole, heralding a future in which entangled quantum bits might be used to probe the mysterious interiors of these bizarre objects.

Scrambling is what happens when matter disappears inside a black hole. The information attached to that matter — the identities of all its constituents, down to the energy and momentum of its most elementary particles — is chaotically mixed with all the other matter and information inside, seemingly making it impossible to retrieve.

This leads to a so-called “black hole information paradox,” since quantum mechanics says that information is never lost, even when that information disappears inside a black hole.

So, while some physicists claim that information falling through the event horizon of a black hole is lost forever, others argue that this information can be reconstructed, but only after waiting an inordinate amount of time — until the black hole has shrunk to nearly half its original size. Black holes shrink because they emit Hawking radiation, which is caused by quantum mechanical fluctuations at the very edge of the black hole and is named after the late physicist Stephen Hawking.

Unfortunately, a black hole the mass of our sun would take about 1067 years to evaporate — far, far longer than the age of the universe.

However, there is a loophole — or rather, a wormhole — out of this black hole. It may be possible to retrieve this infalling information significantly faster by measuring subtle entanglements between the black hole and the Hawking radiation it emits.

Two bits of information — like the quantum bits, or qubits, in a quantum computer — are entangled when they are so closely linked that the quantum state of one automatically determines the state of the other, no matter how far apart they are. Physicists sometimes refer to this as “spooky action at a distance,” and measurements of entangled qubits can lead to the “teleportation” of quantum information from one qubit to another.

“One can recover the information dropped into the black hole by doing a massive quantum calculation on these outgoing Hawking photons,” said Norman Yao, a UC Berkeley assistant professor of physics. “This is expected to be really, really hard, but if quantum mechanics is to be believed, it should, in principle, be possible. That’s exactly what we are doing here, but for a tiny three-qubit `black hole’ inside a seven-qubit quantum computer.”

By dropping an entangled qubit into a black hole and querying the emerging Hawking radiation, you could theoretically determine the state of a qubit inside the black hole, providing a window into the abyss.

Yao and his colleagues at the University of Maryland and the Perimeter Institute for Theoretical Physics in Waterloo, Ontario, Canada, will report their results in a paper appearing in the March 6 issue of the journal Nature.

Teleportation

Yao, who is interested in understanding the nature of quantum chaos, learned from friend and colleague Beni Yoshida, a theorist at the Perimeter Institute, that recovering quantum information falling into a black hole is possible if the information is scrambled rapidly inside the black hole. The more thoroughly it is mixed throughout the black hole, the more reliably the information can be retrieved via teleportation. Based on this insight, Yoshida and Yao proposed last year an experiment to provably demonstrate scrambling on a quantum computer.

“With our protocol, if you measure a teleportation fidelity that is high enough, then you can guarantee that scrambling happened within the quantum circuit,” Yao said. “So, then we called up my buddy, Chris Monroe.”

Monroe, a physicist at the University of Maryland in College Park who heads one of the world’s leading trapped-ion quantum information groups, decided to give it a try. His group implemented the protocol proposed by Yoshida and Yao and effectively measured an out-of-time-ordered correlation function.

Called OTOCs, these peculiar correlation functions are created by comparing two quantum states that differ in the timing of when certain kicks or perturbations are applied. The key is being able to evolve a quantum state both forward and backward in time to understand the effect of that second kick on the first kick.

Monroe’s group created a scrambling quantum circuit on three qubits within a seven-qubit trapped-ion quantum computer and characterized the resulting decay of the OTOC. While the decay of the OTOC is typically taken as a strong indication that scrambling has occurred, to prove that they had to show that the OTOC didn’t simply decay because of decoherence — that is, that it wasn’t just poorly shielded from the noise of the outside world, which also causes quantum states to fall apart.

Yao and Yoshida proved that the greater the accuracy with which they could retrieve the entangled or teleported information, the more stringently they could put a lower limit on the amount of scrambling that had occurred in the OTOC.

Monroe and his colleagues measured a teleportation fidelity of approximately 80 percent, meaning that perhaps half of the quantum state was scrambled and the other half decayed by decoherence. Nevertheless, this was enough to demonstrate that genuine scrambling had indeed occurred in this three-qubit quantum circuit.

“One possible application for our protocol is related to the benchmarking of quantum computers, where one might be able to use this technique to diagnose more complicated forms of noise and decoherence in quantum processors,” Yao said.

Yao is also working with a UC Berkeley group led by Irfan Siddiqi to demonstrate scrambling in a different quantum system, superconducting qutrits: quantum bits that have three, rather than two, states. Siddiqi, a UC Berkeley professor of physics, also leads the effort at Lawrence Berkeley National Laboratory to build an advanced quantum computing test bed.

“At its core, this is a qubit or qutrit experiment, but the fact that we can relate it to cosmology is because we believe the dynamics of quantum information is the same,” he said. “The U.S. is launching a billion-dollar quantum initiative, and understanding the dynamics of quantum information connects many areas of research within this initiative: quantum circuits and computing, high energy physics, black hole dynamics, condensed matter physics and atomic, molecular and optical physics. The language of quantum information has become pervasive for our understanding of all these different systems.”

Aside from Yao, Yoshida and Monroe, other co-authors are UC Berkeley graduate student T. Schuster and K. A. Landsman, C. Figgatt and N. M. Linke of Maryland’s Joint Quantum Institute. The work was supported by the Department of Energy and the National Science Foundation.

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Esketamine: US regulator approves nasal spray to treat depression

Esketamine nasal spray can reportedly work within 24 hours, but critics say more tests are needed.

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