New study suggests that each breast and colon tumor is unique and may arise through mutations in many different combinations of genes.
HHMI announces the selection of 15 of the nation's top patient-oriented researchers, who will soon become HHMI investigators.
Meet the 15 physician-scientists selected in 2007 as new HHMI investigators.
HHMI investigator Mario R. Capecchi is among trio of scientists honored for development of powerful gene-targeting techniques.
Mario Capecchi received a Kyoto Prize from the Inamori Foundation in 1996. The lecture he delivered when he accepted the prize in Japan in November 1996 tells the story of his remarkable life. The text of the lecture has been edited for length.
New studies establish how the stress hormone norepinephrine boosts learning by strengthening connections between neurons.
Scientists have traced the 170 million-year evolution of a piece of "junk" DNA to its modern incarnation as an important regulator of energy balance.
Científicos rastrean la evolución que tuvo, durante 170 millones de años, un pedazo de ADN “basura” hasta encontrar su encarnación moderna como regulador importante del balance energético.
HHMI researchers have figured out how a bacterial circadian clock ticks away using only three interacting proteins.
The Science Education Alliance, headquartered at Janelia Farm, will become a national network of scientists and educators working collaboratively to develop and distribute new materials and methods to the education community.
Under Springer's Open Choice program, articles are immediately published with full open access and deposited in repositories such as PubMed at a flat-rate fee per article.
Researchers have demonstrated how tens of thousands of closely related proteins establish the specificity that allows them to serve as identification tags for individual neurons.
Researchers have determined the identity of a significant feature that makes a neuron a recycler par excellence.
Scientists have succeeded in reprogramming adult stem cells from the testes of male mice into functional blood vessels and contractile cardiac tissue.
A chemical produced when the body breaks down cholesterol inhibits the activity of estrogens circulating in the blood.
Individual variability in innate immunity may leave some people dangerously exposed to common pathogens such as herpes simplex virus.
A genetic mutation found in some people with autism and Asperger syndrome causes social impairment and cognitive enhancement in mice.
Researchers have provided insight into how mutations in a single gene can cause mental retardation and kidney dysfunction in boys with Lowe syndrome.
Studies reveal why the same prion protein can be either weakly or strongly infectious.
HHMI researchers have identified an "emergency" mechanism that yeast cells use to switch on protein synthesis in times of stress.
Huda Zoghbi, an HHMI researcher at Baylor College of Medicine, will deliver a public lecture on "The Path to Understanding and Treating Neurological Diseases" on Tuesday, September 18, 2007.
A red sea anemone purchased in a Moscow pet shop provides a blueprint for a more vivid red fluorescent protein.
Photosensing proteins drive the spread of a bacterial infection that costs cattle farms in Brazil and Argentina up to $100 million a year.
A systematic strategy may uncover the different developmental steps and cellular machinery used to build axons and dendrites.
Proteínas fotosensibles conducen la diseminación de la brucelosis vacuna, que es una infección bacteriana que le cuesta a las haciendas en Brasil y Argentina hasta $100 millones de dólares por año.
Researchers are learning how the neurons of people with Lafora disease accumulate toxic amounts of carbohydrates.
Investigadores aprenden la forma en la que las neuronas de las personas con la enfermedad de Lafora acumulan cantidades tóxicas de carbohidratos.
In mending the DNA broken during antibody production, immune cells can employ a type of DNA repair that is fundamentally different than the classical method.
HHMI will pay the article processing charges for all research published by HHMI investigators in BioMed Central journals.
HHMI scientists have created a completely new enzyme entirely in vitro.
A colorful new palette of fluorescent tags promises to give researchers a better view of life at the molecular level.
This year, HHMI will increase the number, size, and duration of grants it awards to alumni of two of its programs as they begin their careers as physician-scientists.
When pathogenic microbes or chemicals inflame the intestine, the balance of microbial power shifts.
A molecule that constantly reinvents itself is one of the many ingenious mechanisms that the malaria parasite has evolved to protect itself against the human immune system.
Mother's milk can turn toxic if the molecular pathways that govern its production are disrupted.
La leche materna puede volverse tóxica si se descomponen las vías moleculares que gobiernan su producción.
Researchers have identified a new mechanism by which tricyclic antidepressants (TCAs) inhibit neurotransmitter transporters.
Scientists uncover significant differences in the mature, functioning neurons generated from two NIH-approved stem cell lines.
Científicos descubren diferencias significativas en neuronas maduras y funcionales generadas a partir de dos líneas de células troncales aprobadas por el NIH.
By short-circuiting the sensory organ that detects the chemical cues mice use to attract mates, researchers have prompted female mice to behave like male mice in the throes of courtship.
Four students spent their summers participating in a pilot program for undergraduate research at Janelia Farm.
Researchers have produced a genetically altered strain of tuberculosis that elicits a stronger immune response than the current vaccine.
A new delivery vehicle for transplanted islet cells may help clinicians track the cells once they are inside the body.
Researchers have discovered a protein that fetal, but not adult, blood-forming stem cells need to replenish themselves.
The traditional prescriptions for a healthy life—sensible diet, exercise and weight control—extend life by reducing signaling through a specific pathway in the brain.
Las recomendaciones tradicionales para tener una vida sana—dieta prudente, ejercicio y control de peso—extienden la vida al reducir la señalización que se lleva a cabo mediante una vía específica del cerebro.
A protein whose function is lost in a broad array of cancers normally suppresses prostate cancer metastasis, researchers have shown in studies with mice.
HHMI researchers have found that insulin resistance in skeletal muscle leads to alterations in energy storage that set the stage for the metabolic syndrome.
A new device may make the most reclusive members of microscopic communities much more accessible for laboratory study.
It can take hours, or even days, for a virus to infect a cell. But poliovirus is more efficient than the average virus.
A new link between inflammation and cancer has revealed how the body's natural response to tissue injury can actually spur tumor growth.
A new study shows how loss of a single enzyme that performs two critical functions can create the potential for cancer when immune cells divide and mature.
HHMI announces that it will require its scientists to publish their original research articles in scientific journals that allow public access within six months of publication.
Laboratory experiments have enabled researchers to bypass half a billion years of evolution, giving one protein the ability to function like a distantly related protein with just a few simple changes.
Genetic analysis of a year's worth baby poop has given researchers a detailed picture of how bacteria come and go in the intestinal tract.
Scientists have found that they can modify naturally occurring viruses to create targeted weapons against biofilms.
A $22.5 million initiative aims to close the gap between research institutions and their local communities by supporting educational programs intended to stimulate interest in science, particularly among young students.
Read more about a few of the programs that HHMI is supporting through its 2007 initiative for biomedical research institutions.
Treating hepatitis B patients with the drug entecavir can cause those who are also infected with HIV to become resistant to two of the most important drugs in the anti-HIV arsenal.
Zebrafish produce natural chemicals that enhance production of blood-forming stem cells.
El tratar a pacientes con hepatitis B usando la droga entecavir puede hacer que quienes también están infectados con el VIH se vuelvan resistentes a dos de las drogas más importantes del arsenal contra el VIH.
El descubrimiento de que el pez cebra produce productos químicos naturales que incrementan la producción de células troncales de formación de sangre podría traducirse rápidamente a nuevos tratamientos para aumentar la eficacia de los transplantes humanos de médula ósea o de cordón umbilical.
Lefkowitz honored for elucidating the major receptor system that mediates the response of cells and organs to drugs and hormones.
Identifying the complete set of genes whose activity is altered by disease used to appear impossible. Not anymore.
Una mutación en un único gen puede hacer que muchos otros genes comiencen a funcionar—o dejen de hacerlo—, y puede ser que estos cambios causen en última instancia síntomas clínicos. La identificación del conjunto completo de genes afectados parecía imposible. Pero ese ya no es el caso.
An HHMI professor has teamed up with the Posse Foundation to develop a bold plan to equip inner-city high school students to succeed in the sciences.
HHMI scientists have discovered that microRNAs can also shut down the proliferation of cancer cells.
Científicos descubren que fascinantes trocitos de material genético conocidos como microARNs también pueden detener la proliferación de células cancerígenas.
Researchers have identified a master hormone that allows the body to fuel itself with stored fat during times of fasting.
HHMI is boosting its support of outstanding young scientists by entering into collaborations with four institutions.
Researchers have measured the electrical activity at play in brain cells as animals make a choice based on their interpretation of a set of visual cues.
Investigadores han medido la actividad eléctrica de células cerebrales cuando los animales realizan una elección basándose en la interpretación de un conjunto de señales visuales.
Researchers have identified a new population of stem cells that act to repair muscle after damage.
HHMI has become aware of fraudulent checks being issued in its name.
Studies in mice show that lithium can ease the symptoms of spinocerebellar ataxia type 1, an inherited neurodegenerative disorder.
A new database created by HHMI researchers reveals a 700-member strong army of proteins involved in the DNA repair response.
Researchers have found that neural activities in the brain gradually change, even when nothing new is being learned.
Mr. Gay served as an HHMI Trustee from 1984 until his retirement in 2006.
A new kind of test tube is revolutionizing the way researchers observe the behavior of single molecules of DNA, RNA, or proteins.
In recognition of exceptional contributions to science, Gerald M. Rubin and Morgan Sheng have been elected to the Fellowship of the Royal Society.
New evidence shows that Wilms tumor—a rare kidney cancer that affects children—promotes its own growth agenda by taking over a genetic program used by normal cells during development.
HHMI and the Wellcome Trust have joined forces to establish an exchange program designed to promote collaborative science and enhance research opportunities for postdoctoral researchers.
A major new research effort is now beginning to uncover the structural variations in DNA that contribute to genetic differences between humans.
Researchers have identified small regions within a yeast protein that control the protein's conversion to an infectious agent known as a prion.
Un nuevo e importante trabajo está comenzando a descubrir diferencias estructurales en el ADN que generan diferencias genéticas entre los humanos.
Researchers have found that a much-studied gene provides branches of nerve cells the ability to recognize one another and grow apart, helping them cover as much space as they can evenly and efficiently.
Backed by nearly $4 million of support from HHMI, 111 medical and dental students will spend a year doing mentored research at medical research centers nationwide, as participants in two programs designed to help meet the need for researchers with medical and dental training.
Eleven HHMI investigators are among those elected today to the National Academy of Sciences, in recognition of distinguished and continuing achievements in research.
Ten HHMI investigators and two HHMI professors are among 203 fellows elected to the American Academy of Arts and Sciences.
Mice whose brains had lost a large number of neurons regained long-term memories and the ability to learn after their surroundings were enriched with toys and other sensory stimuli.
Ratones cuyos cerebros habían perdido una gran cantidad de neuronas debido a una neurodegeneración recuperaron las memorias a largo plazo y la capacidad de aprender luego de que sus ambientes fueron enriquecidos con juguetes y otros estímulos sensoriales.
HHMI investigators Ronald M. Evans and Robert J. Lefkowitz, together with Johns Hopkins School of Medicine professor Solomon H. Snyder, have been awarded the Albany Medical Center's 2007 Prize in Medicine and Biomedical Research.
Once thought to play an essential role in helping to package neurotransmitters for release, dynamin 1 may not be needed for basic nerve cell function.
A newly identified gene mutation in mice has revealed how the molecular oscillations behind circadian rhythms are kept on track.
Chitin is the stuff of crab shells and the carapaces of dust mites. It may also be the stuff that sets off asthma.
La quitina es la materia de los caparazones de los cangrejos y de las cubiertas de los ácaros del polvo, de las membranas celulares de los líquenes y de incluso las partes internas rígidas de gusanos parasitarios. También podría ser la materia que inicia el asma.
New research has found that genes that enhance the virulence of bacteria are clearly favored for evolutionary survival.
Nueva investigación ha encontrado que genes que aumentan la virulencia de bacterias son favorecidos claramente por la supervivencia evolutiva.
Researchers have devised a way to activate neurons in a living mouse by shining light on the surface of the animal's brain.
McGhee will join Rice to teach and direct a future graduate program in the design of research labs.