Archive for hematology
Could we make blood anywhere in the body?
Our bodies make blood in a specialized niche — a “nursery” within our bone marrow that nurtures blood stem cells so they can replicate and make different kinds of blood cells. The lab of Leonard Zon, MD, has even shown how blood stem cells, once they settle in the niche, are “cuddled” by nearby cells. ... Read More
How a leukemia hijacks the genes needed by blood stem cells
As a child, Lynn Aureli didn’t know that a particular genetic change contributed to her acute myeloid leukemia (AML) — an alteration that eventually would help explain the cancer’s lack of response to chemotherapy. Nor was she aware that her cancer had hijacked the genetic mechanism for maintaining the stem cells that form blood, like ... Read More
‘Mom, my brain feels better.’ One mother’s story of her daughter’s fight with epilepsy
Liliane has a lot to be grateful for this holiday season. Until just this year, her 16-year-old daughter Emily, who has epilepsy, suffered relentless seizures that left her temporarily unable to speak or stand. The seizures began when Emily was 4, and living her life around them was all she knew. But today, Emily is ... Read More
Tim Springer: Scientist, entrepreneur, and mentor
As an undergraduate in 1966, immunologist, biochemist, and biophysicist Timothy A. Springer, PhD, looked askance at science. The Vietnam War was going on, and he saw science as a means of making Agent Orange and napalm. Questioning his own Ivy League education, he left Yale to spend a year as a VISTA volunteer on a ... Read More
New work transforms our knowledge of how blood is formed
The origins of our blood may not be quite what we thought. In groundbreaking research, scientists in the Stem Cell Program at Boston Children’s Hospital used cellular “barcoding” techniques in mice to track the development of blood in real time — and found that blood cells originate not from one type of mother cell, but ... Read More
Sickle cell disease, gene therapy, and blood cancers: Mysteries remain
Gene therapy trials for sickle cell disease have been showing great promise, even offering hope of a cure. But in early 2021, the trials ground to a halt after reports of blood malignancies in two people in a trial sponsored by bluebird bio. Investigations later concluded that the gene therapy delivery vectors were likely not ... Read More
Too many blood cells: Probing a blood cancer’s genetic origins
At age 7, Meredith Shah began having debilitating migraine headaches. “I would have trouble seeing and shapes were blurry,” she recalls. “It was really painful.” Over time, the frequency and intensity of the headaches escalated. Her parents, Heidi and Nil, sought the help of multiple specialists. But they received few answers, other than an indication ... Read More
Gene therapy’s future may be all about the bases
Gene therapy offers the possibility of a cure for many genetic disorders, especially those involving a single gene. The first kind of gene therapy used a virus to carry a corrected copy of the gene into people’s cells. When the early viral vectors used in the 1990s were found to have off-target effects, sometimes even ... Read More
Tracking an organism’s development, cell by cell
A new mouse model allows scientists to track every cell in the body — from the embryo stage until adulthood. The system is the first of its kind and should yield a greater understanding of development, aging, and disease. Scientists described it last week in the journal Cell. “The dream of many developmental biologists for ... Read More
Adults with cancer appear more vulnerable to COVID-19
Cancer, particularly metastatic cancer, can be added to the list of medical conditions that pose a significant risk of worse COVID-19 outcomes , suggests a new study. Led by Boston Children’s Hospital and Zhongnan Hospital of Wuhan University, it represents the first large cohort study to examine COVID-19 outcomes in cancer patients. Findings were published ... Read More