Stories by Karen Weintraub

Could scientists one day use blood and skin cells to replace sperm and eggs?

Novartis’s retiring CEO hopes such treatments will soon be deployed against lymphoma, other cancers

Exposure to everyday pathogens generates an immune response that could interfere with CRISPR-based gene-editing treatment 

European doctors use gene therapy to correct an inherited disease and replace 80 percent of Syrian refugee's epidermis

This tool could, in theory, fix genetic mistakes that lead to about 15,000 illnesses

 A new study raises questions about potential dangers

The famed primatologist talks about her past work, her environmental concerns and the importance of conservation

Researchers say harsh side effects and puzzling gaps in effectiveness can be tweaked

CRISPR has enabled researchers to inactivate viruses in donor animals that may sicken humans

The technique, tested in rodents, could yield better sensation and control of prosthetic limbs

Overexposure to insecticides has bred resistance in the parasites, making it harder than ever to treat infestation

It may be time to update the currently observed 14-day rule as a benchmark

Reluctant protesters say they no longer have the luxury of staying in the lab

Flagging children early offers the possibility of more effective treatment

Doctors and patients are grappling with the unsettling finding that chronic use of popular heartburn medicines may be riskier than was thought

Students, doctors and researchers join a big protest in the academic hub of Boston

Baseline data on body rhythms can make the wrist monitors work like “check engine” lights, a new study suggests

A new book lays out the scientific case for lengthening your telomeres—and perhaps your life 

For patients with blood cancer or in need of a bone marrow transplant, the amino acid valine could hold answers to new treatments

Changes to gene activity that occur with age can be turned back, a new study shows 

Enhancing the body’s own immune system is leading to promising results in the battle against malignancy

Mitochondrial disease can somehow creep back in, even if a mother’s mitochondria are virtually eliminated in an attempt to block inherited illnesses

Scientists make a fundamental discovery about the amino acid valine’s role in blood stem cell development 

Cells were matured in a lab dish, edging toward a process that may one day work in humans