Seth Rakoff-Nahoum, MD, PhD, a Boston Children’s Hospital physician-scientist who does infectious disease research and is taking an evolutionary approach to understanding the human microbiome and its effect on health, offers us some insight into what’s happening to the bugs in our gut as a result of the Thanksgiving meal.
Q: Does the traditional American Thanksgiving meal affect the human microbiome?
A: Anything you put in your body has the potential to affect your microbiome, and Thanksgiving dinner is no different. …
Soft robotic actuators, which are pneumatic artificial muscles designed and programmed to perform lifelike motions, have recently emerged as an attractive alternative to more rigid components that have conventionally been used in biomedical devices. In fact, earlier this year, a Boston Children’s Hospital team revealed a proof-of-concept soft robotic sleeve that could support the function of a failing heart.
Despite this promising innovation, the team recognized that many pediatric heart patients have more one-sided congenital heart conditions. These patients are not experiencing failure of the entire heart — instead, congenital conditions have caused disease in either the heart’s right or left ventricle, but not both.
“We set out to develop new technology that would help one diseased ventricle, when the patient is in isolated left or right heart failure, pull blood into the chamber and then effectively pump it into the circulatory system,” says Nikolay Vasilyev, MD, a researcher in cardiac surgery at Boston Children’s.
Now, Vasilyev and his collaborators — researchers from Boston Children’s, the Harvard John A. Paulson School of Engineering and Applied Sciences and the Wyss Institute for Biologically Inspired Engineering at Harvard University — have revealed their soft robotic solution. They describe their system in a paper published online in Science Robotics today. …
Eating allergenic foods during pregnancy can protect your child from food allergies, especially if you breastfeed, suggests new research. The findings, in a mouse model of allergy, underscore recent advice that pregnant or nursing mothers not avoid allergenic foods like eggs and peanuts.
The study is the first controlled investigation to demonstrate protection against food allergy from breast milk, while also pointing to a biological mechanism for inducing food tolerance. It was published online today in the Journal of Experimental Medicine.
“Whether mothers should eat allergenic foods during pregnancy or avoid them has been controversial,” says Michiko Oyoshi, PhD, of Boston Children’s Division of Allergy and Immunology, who led the study in collaboration with Richard Blumberg, MD, of Brigham and Women’s Hospital, her co-senior author.
“Different studies have found different results, in part because it’s hard in human studies to know when mothers and babies first encountered a specific food,” says Oyoshi. “But in a mouse model, we can control exposure to food.” …
Children with hydrocephalus often have shunts implanted to drain the excess cerebrospinal fluid that builds up inside their brain. Unfortunately, shunts have a tendency to plug up. This potentially life-threatening event necessitates emergency surgery to correct or replace the shunt.
“If you have a shunt, you are always worried about what might happen in the future,” says Joseph Madsen, MD, a neurosurgeon at Boston Children’s Hospital. “Close to half of shunts will have a revision within the first year of implantation. About 80 percent will require a revision within 10 years.”
Last week, the FDA cleared a device originally conceived by Madsen that can potentially flush out a clogged shunt noninvasively, avoiding the need for surgery in both children and adults. The neurosurgeon or other trained healthcare professional could simply press a button at the back of the patient’s head, just under the skin, in an office setting, Madsen says. …
Type 1 diabetes is caused by an immune attack on the pancreatic beta cells that produce insulin. To curb the attack, some researchers have tried rebooting patients’ immune systems with an autologous bone-marrow transplant, infusing them with their own blood stem cells. But this method has had only partial success.
“We found that in diabetes, blood stem cells are defective, promoting inflammation and possibly leading to the onset of disease,” says Paolo Fiorina, MD, PhD, of Boston Children’s Hospital, senior investigator on the study.
But they also found that the defect can be fixed — by pre-treating the blood stem cells with small molecules or with gene therapy, to get them to make more of a protein called PD-L1.
In experiments, the treated stem cells homed to the pancreas and reversed hyperglycemia in diabetic mice, curing almost all of them of diabetes in the short term. One third maintained normal blood sugar levels for the duration of their lives. …
Nearly two months after Hurricane Maria swept through Puerto Rico, the infrastructural damage remains evident — today, FEMA estimates that only 41 percent of the island has had power restored. But the impact on human behavior is just beginning to be understood.
Research collaborators from the Boston Children’s Hospital Computational Epidemiology Group, MIT Media Lab and Google, Inc., have shed light on the particulars of when people chose to move out of the hurricane’s path and how much travel has been hindered since destructive winds and flooding knocked Puerto Rico off the grid. …
From a cozy, dark and quiet existence, a preterm baby is forced out into a harsh, bright and noisy environment. Instead of being comforted and held securely by their parents, preemies are poked and prodded, hooked up to machines and exposed to jarring sights and smells as their developing brains struggle to realign.
Each year, an estimated 15 million babies around the world — 1 in 10 — are born prematurely. Medical advances enable more of them to live, but often with medical and developmental problems.
Immune cells called “killer cells” target bacteria invading the body’s cells, but how do they do this so effectively? Bacteria can quickly evolve resistance against antibiotics, yet it seems they have not so readily been able to evade killer cells. This has caused researchers to become interested in finding out the exact mechanism that killer cells use to destroy bacterial invaders.
Although one way that killer cells can trigger bacterial death is by inflicting oxidative damage, it has not yet been at all understood how killer cells destroy bacteria in environments without oxygen.
Now, for the first time, researchers have caught killer cells red-handed in the act of microbial murder …
Three-dimensional modeling and CRISPR-Cas9 gene editing technology are giving scientists a new view into Sturge-Weber syndrome, a rare congenital disorder that causes small blood vessels, called capillaries, to be malformed. These capillary malformations can cause port wine birthmarks on the face and neck, and in some cases, abnormal vasculature in the brain that can spark seizures.
Rotavirus, a major cause of early childhood diarrhea, could have a lot to tell drug developers about how to deliver their products into cells.
Rotavirus doesn’t have an outer membrane, so it’s had to evolve a special system to infect cells. “Viruses with a membrane, like flu or HIV, can simply fuse that membrane with the membrane of the target cell and dump their contents inside the cell,” says Stephen Harrison, PhD, chief of the Laboratory of Molecular Medicine at Boston Children’s Hospital.
Rotavirus does something different, Harrison’s lab has found. First, each virion attaches itself to the cell membrane and wraps itself inside it. Next, its outer proteins, VP4 (the red spikes above) and VP7 (in yellow), disrupt that membrane — and are stripped off in a matter of seconds.
“If you will, they’re the booster the rocket has to shed so the payload can continue,” says Harrison. …