Sarah Okonkwo
325 stories · Page 7 of 14
The Gut's Doorway Cells Have a Second Job: Landlord to Its Barrier Defenders
Microfold cells were filed away as passive antigen samplers. In mice, they turn out to build and staff the niche that keeps the gut's IL-22 defenders alive, the cytokine that fortifies the intestinal barrier and keeps sampled bacteria contained inside its immune outposts.
Metabolic & WeightThe Cheapest Measurement in the Exam Room Beat BMI and the Lancet's Four-Part Obesity Formula
BMI flagged 37 percent of the adults a body-fat scan called obese. On overall accuracy, a cloth tape around the waist caught far more and edged out the four-measurement framework built to fix BMI.
Metabolic & WeightYour Immune Cells Remember Obesity for Up to a Decade After the Weight Comes Off
CD4 T cells hold chemical marks of past obesity for an estimated five to ten years, which may help explain why the risk for diabetes and some cancers can linger long after the scale reads normal.
Autoimmune & InflammationThey Worried a Pig Kidney Would Burn the Bridge to a Human One. In the First Two Patients, It Didn't.
A gene-edited pig kidney kept Tim Andrews off dialysis for a record 271 days before it failed and came out. The worry was that it would leave his immune system too sensitized for a human match. In the first two patients, it hasn't.
Brain & AgingThe ADHD Creativity Bump Is Modest, and It Fades Right Where the Symptoms Turn Clinical
The headlines sell the wandering ADHD mind as a hidden creative gift. The data underneath shows the edge is modest and flattens right as symptoms cross into the clinical range.
Nutrition & FoodAll 719 Blood Samples Carried Mold Toxins, and the Youngest Children Carried the Riskiest Kidney Dose
Researchers tested the blood of 719 women and young children in rural Bangladesh. Ochratoxin A turned up in every single one, and modeling put up to 99 percent of the children over the line toxicologists use to flag a cancer-risk exposure.
Nutrition & FoodThe Coffee-Weakens-Bones Study Never Analyzed a Single Fracture
Nearly 10,000 older women, ten years of hip scans, and the coffee alarm that made headlines came from a spline curve that never cleared statistical significance.
Brain & AgingChronic Money Trouble Showed Up on the Brain Scans, Decades Later
In a British cohort followed since birth, people who spent years in the bottom fifth of income had weaker verbal memory by their fifties and larger brain ventricles, a marker of brain aging, by their seventies, even after childhood and education were accounted for.
Metabolic & WeightMindfulness Dropped Their Blood Pressure 7.6 Points. Diet, Movement, and Pills Did the Lowering.
Eighteen randomized trials found positive-psychology and mindfulness programs nudged blood pressure down within weeks. Look closely at the ones that worked best and the active ingredient was ordinary: coaching people to move more, eat better, and take their pills.
CancerThe Executioner's Second Job: A Death Enzyme That Also Calls NK Cells to the Tumor
Caspase-3, the enzyme biology calls the executioner, turns out to carve a hidden, nucleus-bound form of interleukin-18 that summons NK cells to hunt tumors, a role the study says had gone unrecognized.
Brain & AgingIn Mice, Early-Life Stress Writes a Molecular Mark Onto the Brain's Reward Neurons. Turn One Enzyme Down, and It Never Sets
Early-life stress raises an enzyme called SETD7 in the brain's dopamine neurons, loosening the DNA around stress genes so they fire too easily into adulthood. When researchers blocked it in mice, the stressed animals did not develop the same anxiety-like stress sensitivity, and stayed as social and
Drugs & FDAJ&J Won the First-Ever Drug Approval for Warm Autoimmune Hemolytic Anemia. It Helped About One in Four Patients.
It works by starving rogue antibodies of the recycling route that keeps them alive. Whether it beats the drugs doctors already reach for is the question the first-ever headlines skip.
Brain & AgingIn Depressed Brains, the New-Neuron Supply Had Stalled Where Fresh Pain Gets Sorted From Old
Columbia researchers mapped nearly 500,000 cells from postmortem brains and found the depressed ones showed a stalled supply of new hippocampal neurons, the cells thought to keep a fresh setback from merging with every old one.
Metabolic & WeightYour Gut Remembers the Benzo You Quit Three Years Ago
Screen 2,509 people's guts against their prescription records and the fingerprint lingers: benzodiazepines, antidepressants and acid-reducers stay linked to a shifted microbiome years after the last pill, some rivaling antibiotics.
Metabolic & WeightThe Standard Treatment for This Fatal Lung Disease Killed More Patients Than Placebo. Now the Theory Behind It Is Back.
Eight patients died on the drugs, one on placebo, and a government safety board halted the trial for harm. Now a Nature Immunology review argues three kinds of inflammation work together in the disease after all.
Brain & AgingIn Abstinent Mice, a Deep Brain Region More Than Doubles Its Activity Before Relapse
In mice, a deep brain region more than doubled its activity after they quit drinking, before they touched a drop again. Relapse-like drinking may be a brain adaptation, not a failure of will.
Metabolic & WeightNew York Let Its Poorest Mothers Breathe Bus and Boiler Soot for Decades. When It Cleaned the Air, Toddler Scores Rose.
Columbia followed more than a thousand poor New York kids for twenty years as soot from buses and heating oil fell, and their age-3 cognitive scores came in 26 percent higher. How much of that the air can actually claim is the open question, and the sharper evidence is buried underneath it.
Autoimmune & InflammationHow Fiber Teaches a Self-Erasing Gut Wall to Remember for Two Weeks
Butyrate, the compound gut bacteria make from fiber, reprogrammed the intestinal lining of mice to keep raising IL-10 and blunting colitis for 2 weeks after the last dose, and the imprint held even in mice with no gut bacteria at all.
Metabolic & WeightBerkeley Dusted Off a Shelved 1970s Fat Compound That Burns Energy Instead of Appetite, and in Mice It Spared the Muscle
GLP-1 drugs quiet your appetite, and along with the fat they can pull out a real chunk of muscle. A shelved acetyl-CoA carboxylase inhibitor from the 1970s went after the other lever, energy burned, and in obese mice it left the lean mass alone.
Metabolic & WeightThe Exercise Paradox: Lousy for Losing Weight, Your Best Bet for Keeping It Off
A study of more than 1,100 people found activity did almost nothing for the pounds they shed, yet it was one of the strongest signals of whether that weight stayed gone.
Metabolic & WeightFluoride and Kids' Hearts: The Reassuring Study Tested Water Below What US Taps Are Told to Add
Researchers measured fluoride and heart risk in 161 Iranian children, and the main analysis found no significant link. But they drank water below the level US taps are told to add, and a different adjustment flipped the numbers.
Brain & AgingA Brain Clock Says Your Fourth Language Is Worth 13 Years. Nobody's Published the Proof.
The 13-years-younger figure comes from a conference talk with no paper behind it, and the sturdier study underneath still can't tell you whether the languages did anything at all.
Metabolic & WeightThis Weight-Loss Hormone Protected Mouse Livers Without a Pound Lost. Novo Nordisk Supplied It and Put Two Scientists on the Study.
The hormone works through the same brainstem switch that makes weight-loss drugs nauseating, and the company developing it supplied the compound, funded the mouse study, and put two of its scientists on the author list.
Metabolic & WeightThe Hunger Neurons Ozempic Was Meant to Silence Are the Ones Burning Your Fat
Silence the hunger neurons and semaglutide keeps killing appetite, but in Yale's female mice the lost fat came back within 15 days.