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Closeup of a pair of hands in blue gloves holding a white mouse and injecting it with an amber colored liquid.
Opioids Recruit the Immune System to Cause Withdrawal Symptoms
A study finds that T cells induced by heroin cross the blood-brain barrier to wreak havoc on the brain, hinting at new ways to prevent withdrawal.
Opioids Recruit the Immune System to Cause Withdrawal Symptoms
Opioids Recruit the Immune System to Cause Withdrawal Symptoms

A study finds that T cells induced by heroin cross the blood-brain barrier to wreak havoc on the brain, hinting at new ways to prevent withdrawal.

A study finds that T cells induced by heroin cross the blood-brain barrier to wreak havoc on the brain, hinting at new ways to prevent withdrawal.

mouse study
three black mice lined up next to each other. the one on the left, fed a low-fat diet, has one small bald patch, the middle mouse, fed fish oil, has a large bald spot across its shoulders and back, and the right mouse, fed cocoa butter, has no baldness.
Fish Oil in Diet Can Cause Hair Loss in Mice, Study Finds
Katherine Irving | Jan 19, 2023 | 3 min read
The oil’s omega-3 fatty acids accumulate in the mice’s skin, triggering an immune response that causes hair loss.
illustration of T cell attached to protein
“Smarter” CAR T Cells Target Tumors with Precision
Natalia Mesa, PhD | Dec 16, 2022 | 5 min read
Two studies in mice now show that researchers can control when and where CAR T cells are active, potentially overcoming previous hurdles for CAR T–based treatments.
a white mouse sits on a blue exercise wheel, looking out onto the shavings below
Mice With a Healthy Gut Microbiome Are More Motivated to Exercise
Katherine Irving | Dec 16, 2022 | 4 min read
A neural pathway between the gut and the brain led to the release of dopamine when the mice ran on a wheel or treadmill, but only in the presence of a robust microbiome. 
Illustration of HIV virus
Viral Protein Behind Chronic Inflammation in People with HIV: Study
Natalia Mesa, PhD | Dec 12, 2022 | 3 min read
The HIV protein Nef can cause long-term genetic changes that lead to hyperreactive immune cells, according to research in human cells and mice. 
A mouse in front of an open sack of grain.
Mice Fed a Highly Processed Diet Are More Susceptible to the Flu
Alejandra Manjarrez, PhD | Nov 18, 2022 | 3 min read
It’s not clear why grain-fed mice are better able to recover after infection, but a study’s findings suggest food type may skew the results of animal studies.
a small black mouse sits next to an obese black mouse on a white background
Obesity Protects Against Genital Herpes in Mice, Study Finds
Katherine Irving | Nov 11, 2022 | 3 min read
A high-fat diet induced changes to the animals’ vaginal microbiomes that boosted survival after exposure to the virus.
Circular clusters of <em>Staphylococcus aureus</em> drift on a blue background.
Retching Mice Reveal the Brain Circuit Behind Vomiting
Katherine Irving | Nov 2, 2022 | 2 min read
The discovery could one day lead to the development of better antinausea medications.
Micrograph of kidney tissue from a mouse
Vesicles from Young Mice Alleviate Signs of Aging in Older Animals
Catherine Offord | Oct 19, 2022 | 4 min read
Mice that received the stem cell–derived treatment were less frail compared with controls, a study reports.
Drawing of a mouse scratching itself after watching a video of a different mouse scratching itself.
Specialized Brain Circuit Makes Mice Itchy When They See Others Scratch
Dan Robitzski | Oct 12, 2022 | 4 min read
A previously undetected pathway in the mouse brain bypasses the visual cortex to directly activate contagious itch.
Karyotype with most chromosomes in blue, one in red and green.&nbsp;
Researchers Fuse Mouse Chromosomes in Scientific First
Natalia Mesa, PhD | Aug 25, 2022 | 4 min read
The findings will likely help elucidate the effects of chromosome fusions, which can cause disease but have also contributed to evolution.
microscope image series showing synthetic embryo development
Mouse Embryo: No Sperm, Egg, or Uterus Required
Christie Wilcox, PhD | Aug 2, 2022 | 3 min read
Using stem cells and a bioreactor, researchers generated living embryos that survived for more than a week and began to develop internal organs.
salmonella bacteria 3d illustration
Salmonella Injection Helps the Mouse Immune System Kill Tumors
Dan Robitzski | May 16, 2022 | 3 min read
Nanoparticle-coated bacteria can capture tumor antigens and deliver them to immune cells, triggering a response that improved survival rates in mice.
Illustration showing how following radiation therapy, which triggers the release of cancer-specific antigens, researchers injected Salmonella typhimurium bacteria covered in positively charged nano- particles near tumors in mice.
Infographic: Salmonella Shuttle Tumor Antigens to Immune Cells
Dan Robitzski | May 16, 2022 | 1 min read
Nanoparticle-coated bacteria carry cancer-derived proteins to dendritic cells, enabling the immune system to launch a response in a mouse model.
Image of sperm hooks (<em>Peromyscus maniculatus</em>)
The Mystery of the Mouse Sperm Hook
Natalia Mesa, PhD | May 2, 2022 | 5 min read
Nearly all mouse sperm have hooks on their heads. But new research suggests the structures slow them down—so what exactly is their purpose?
Conceptual image of blue neurons with glowing segments over blue background.
CRACK Method Reveals Novel Neuron Type in Mouse Brain
Dan Robitzski | Apr 18, 2022 | 3 min read
A new technique reveals cells’ precise locations and functions in the brain. Its developers have already used it to identify a previously unknown neuron type.
Illustration showing how calcium imaging and HCR-FISH combined is a technique called comprehensive readout of activity and cell type markers (CRACK)
Infographic: Simultaneously Studying Neuron Structure and Function
Dan Robitzski | Apr 18, 2022 | 1 min read
A new methodology combines existing techniques to reveal the specific function and location of multiple types of neurons at once.
mice on wheel and ground
Exercise-Associated Protein Boosts Brain Function in Mice
Chloe Tenn | Dec 9, 2021 | 5 min read
A study that transfused plasma from active to inactive mice suggests the protein clusterin enhances cognition.
Rounded red and green fluorescent cells are visible on a light and dark gray background
Neurons Firing Together Generate Spontaneous Pain
Abby Olena, PhD | Nov 10, 2021 | 4 min read
Abnormal sympathetic neuron growth leads to simultaneous activation of clusters of sensory neurons, causing the difficult-to-treat sensation.
Illustration of neurons in white with myelin in blue
Repurposed Drug Reverses Signs of Alzheimer’s in Mice, Human Cells
Jef Akst | Oct 12, 2021 | 2 min read
Researchers say they hope to launch a clinical trial to test bumetanide, a diuretic approved in 2002, but how it might improve neural functioning is unclear.
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