Health
Living at high altitudes could reduce risk of common disease, study suggests
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Living at high altitudes may lower the risk of diabetes, and scientists believe they have finally figured out why.
A new study from the Gladstone Institutes in San Francisco examined how red blood cells behave in low-oxygen environments. The findings, published in the journal Cell Metabolism, reveal that at high elevations, red blood cells begin absorbing large amounts of glucose from the bloodstream, acting as a “sponge” for sugar.
When oxygen levels drop, these cells then alter their metabolism to deliver oxygen more efficiently.
This shift also lowers circulating blood sugar, which researchers say explains the lower diabetes risk seen in mountain-dwelling populations.
A previous study of over 285,000 adults in the United States found that people living at high altitudes (1,500-3,500 meters) were significantly less likely to have diabetes than those living at sea level, even after adjusting for factors like diet, age and ethnicity.
A new study finds that living at high altitudes explains the lower diabetes risk seen in mountain-dwelling populations. (iStock)
“Red blood cells represent a hidden compartment of glucose metabolism that has not been appreciated until now,” said senior author Isha Jain, a Gladstone investigator and professor of biochemistry at UC San Francisco, in the press release. “This discovery could open up entirely new ways to think about controlling blood sugar.”
Previously, Jain’s team conducted experiments on mice to better understand hypoxia, or reduced oxygen levels in the blood.
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Mice exposed to thin air cleared sugar from their bloodstream almost instantly after eating, a trait typically linked to a lower risk of diabetes. Initially, however, researchers couldn’t figure out where the sugar was going.
When oxygen levels drop, these cells then alter their metabolism to deliver oxygen more efficiently. (iStock)
“We looked at muscle, brain, liver — all the usual suspects — but nothing in these organs could explain what was happening,” said Yolanda Martí-Mateos, a postdoctoral scholar in Jain’s lab and the study’s first author.
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The team discovered the answer using an alternative imaging method: the red blood cells themselves were the missing “glucose sink.”
By using a different type of imaging, the team found that the red blood cells were holding onto the glucose.
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Under hypoxic conditions, the mice produced more red blood cells, and each cell absorbed significantly more glucose than they did in normal conditions.
Red blood cells act as glucose “sponges” at high elevations, absorbing sugar from the bloodstream. (iStock)
The researchers even developed a drug, HypoxyStat, that mimics this high-altitude effect. In laboratory tests, the drug completely reversed high blood sugar in diabetic mice.
Study limitations
The researchers acknowledged some limitations with the study. The research focused on one specific mouse strain known for its sensitivity to blood sugar. While humans show similar results, testing other strains would confirm that the findings are universal.
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To ensure consistent results, the team only studied young male mice. Because age and sex significantly impact how red blood cells are produced, more research is needed to determine whether these findings hold true for females and older populations.
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“This is just the beginning,” Jain said.
“There’s still so much to learn about how the whole body adapts to changes in oxygen, and how we could leverage these mechanisms to treat a range of conditions.”
Health
What to do if someone is having a stroke, after Jill Biden revealed debate-night fears
Jill Biden says Joe’s debate performance made her wonder if he had a stroke
Former first lady Jill Biden revises her account of former President Joe Biden’s disastrous 2024 debate, now alleging she feared he was suffering a stroke. This new statement from the first lady contrasts sharply with her earlier public affirmations of his performance. Contributor Ben Domenech scrutinizes the timing and motivations behind this sudden shift.
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Former first lady Jill Biden has expressed her concerns about former President Joe Biden’s health status, noting that she feared he was having a stroke during a 2024 debate against President Donald Trump.
Biden struggled his way through the performance, with long periods of silence, confused facial expressions and stammered speech. In a recent interview with CBS, Jill Biden commented that she was “frightened.”
“I don’t know what happened,” she said. “I mean, when I watched it, I thought, ‘Oh my God, he’s having a stroke,’ and it scared me to death.”
JILL BIDEN SAYS SHE THOUGHT JOE WAS HAVING A STROKE DURING HIS DISASTROUS 2024 DEBATE PERFORMANCE
A stroke occurs when there is bleeding in the brain or when blood flow to the brain is blocked, according to Mayo Clinic.
Identifying a stroke may be difficult, as symptoms can vary.
Stroke symptoms can include balance loss, weakness, slurred speech, face drooping, confusion and severe headaches. (iStock)
The American Stroke Association (ASA) identifies the following key warning signs, using the acronym “B.E. F.A.S.T.”
- B – Balance loss
- E – Eye (vision) changes
- F – Face drooping
- A – Arm weakness
- S – Speech difficulty
- T – Time to call 911
In a situation in which someone could be having a stroke, “the only” thing to do is to call 911, Fox News senior medical analyst Dr. Marc Siegel told Fox News Digital.
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The doctor emphasized other symptoms to watch for, including weakness on one side, slurred speech, difficulty processing information and confusion.
The ASA also warns that severe headaches can also be a sign of stroke.
At the first sign of stroke, 911 should be contacted immediately, as 1.9 million brain cells die every minute that a stroke goes untreated. (iStock)
Siegel advised against giving the person an aspirin, as it could worsen bleeding in the brain if that is the cause of stroke.
With an ischemic stroke, that type of medication could be helpful.
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The ASA says 1.9 million brain cells die every minute that a stroke goes untreated, which means earlier treatment leads to higher survival rates and lower risk of disability.
“In medicine, we use the term ‘time is brain,’” Siegel said. “This means that the faster you bring the patient to the emergency room, the faster they can receive emergency treatment if indicated to reopen the blocked artery in the brain, if there is one.”
Brain imaging should be done within the first several hours after seeking medical attention for a stroke, according to a top physician. (iStock)
Brain imaging can also be done on arrival at the ER, which should occur within the first several hours, Siegel said.
Anyone who is experiencing a stroke should not drive themselves to the hospital, according to the CDC. Instead, the person should get a ride or call 911 — as treatment begins inside the ambulance.
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About 80% of strokes are preventable, the American Heart Association states.
Prevention includes managing high blood pressure, diabetes, atrial fibrillation and other risk factors.
One in four survivors have another stroke within the next five years, per CDC data, so those at higher risk should prepare a prevention and treatment plan.
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Fox News Digital’s Alexander Hall contributed to this report.
Health
Controversial drug delivered rapid relief for severe depression in just hours
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Health
Single infusion of controversial drug changed severe depression symptoms within hours, study finds
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People experiencing severe depression with suicidal symptoms may not have to wait weeks for traditional antidepressants to take effect.
A recent review suggests that a single intravenous ketamine infusion can provide rapid relief for some patients.
Originally developed as an anesthetic, ketamine is a medicine that can reduce pain and, in some cases, help treat depression, but it can also be misused as a recreational drug, experts warn.
SINGLE DOSE OF POWERFUL PSYCHEDELIC CUTS DEPRESSION SYMPTOMS IN CLINICAL STUDY
Researchers from the University of Connecticut School of Medicine reviewed 26 clinical trials that included more than 1,100 patients. Approximately 626 received ketamine and 540 served as controls who did not take the drug.
Most of the trials included patients with major depressive disorder, but 11.5% included those with bipolar depression and 7.7% included people with both unipolar and bipolar depressive diagnoses.
A recent review suggests that a single intravenous ketamine infusion can provide rapid relief for some patients with treatment-resistant depression. (iStock)
Compared to a placebo, a single treatment significantly reduced depression in just four hours and dramatically lowered suicidal thoughts within 24 hours, the study found.
Patients reported fewer depressive symptoms after a week and reduced suicidal thoughts for up to a month after one ketamine infusion. Those who received repeated ketamine infusions showed a similar reduction of suicidal and depressive symptoms at the end of the treatment.
WHAT IS KETAMINE THERAPY? MORMON REALITY STARS TOUT CONTROVERSIAL TREATMENT
The most common adverse effects of ketamine – including headaches, numbness, dissociation (“out of body” experiences), nausea, dizziness and visual disturbances – were temporary and resolved within hours of the infusion.
Rarer, more serious side events included hospitalization, suicide attempts and suicide, but most were unrelated to ketamine, the review stated.
The analysis was published in May in JAMA Psychiatry.
Treatment-resistant depression
Major depressive disorder is a formal psychiatric diagnosis affecting approximately 280 million people globally, according to recent research.
Effective treatment involves a combination of therapy and medication, frequently antidepressants. However, for a few patients, symptoms do not respond to multiple therapies, a condition known as treatment-resistant depression, doctors say.
“When all existing treatment options fail, patients with severe depression could consider ketamine infusions.”
These patients are at a higher risk of very serious, sometimes tragic consequences, including suicidal thoughts, suicide attempts and death.
“When all existing treatment options fail, patients with severe depression could consider ketamine infusions,” lead author Taeho Greg Rhee, PhD, of the University of Connecticut School of Medicine, told Fox News Digital. “This is still a safer option when compared to electroconvulsive therapy (ECT).”
Compared to a placebo, a single treatment significantly reduced depression in just four hours and dramatically lowered suicidal thoughts within 24 hours, the study found. (iStock)
Traditional antidepressants stabilize mood by slowly elevating serotonin levels in the brain, but it can take weeks for the full effect to be achieved.
Ketamine, in contrast, works rapidly by blocking glutamate, a neurotransmitter that can impact emotions negatively when levels are too high in the brain, according to Cleveland Clinic.
Implications for care
The authors say their findings have two important potential clinical applications.
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First, ketamine’s rapid effects can be a life-saving treatment in the emergency room for patients presenting with suicidal ideation.
Experts caution that the medication should only be administered in closely monitored settings, such as clinics, to ensure safe treatment. (iStock)
Second, the effects of a single ketamine infusion are relatively short-lived – as almost all patients relapsed with depressive symptoms after a single infusion – so those with treatment-resistant depression will need repeated sessions.
“While intravenous ketamine is not yet FDA-approved for treating depression, it may still be used with off-label indications for those with severe depression and/or with a high risk of suicidal behaviors,” said Rhee.
Experts urge caution despite promise
Dr. Lama Bazzi, a psychiatrist in private practice in New York City, has had several patients receive ketamine infusions.
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“For a small subset of patients in a major depressive episode or struggling with suicidal thoughts, intravenous ketamine can be genuinely lifesaving,” Bazzi, who was not involved in the study, told Fox News Digital. “The relief they experience is almost immediate, offering them distance from the intensity of their emotions.”
However, she cautions that the medication should only be administered in closely monitored settings, such as clinics, to ensure safe treatment.
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Ketamine is not a panacea, Rhee agreed, warning of the potential risk of abuse and addiction.
“It should only be used medically,” he advised.
Ketamine’s rapid effects can be a life-saving treatment in the emergency room for patients presenting with suicidal ideation, some experts claim. (Getty Images)
Dr. Marc Siegel, Fox News senior medical analyst, noted in previous comments to Fox News Digital that ketamine is increasingly being used to treat severe depression, but emphasized that it should be administered under careful medical supervision because of its potential risks.
Study limitations
Although the studies compared ketamine with a placebo, some patients may have realized they were receiving the drug. This could have influenced how they reported their symptoms and how effective they perceived the treatment to be, according to the researchers.
“It should only be used medically.”
Another limitation is the small sample size of the studies, which could make the effects seem disproportionately magnified.
Also, as this was a review of many different studies, it is challenging to apply the findings to the general population, the researchers noted.
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“While long-term outcomes have not been studied, I believe that when patients are severely depressed or suicidal, ketamine is sometimes the only choice that almost always works,” Bazzi added.
Anyone interested in exploring alternative depression treatments should first consult a doctor.
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