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Tag: "types" at biology news

New research shows why too much memory may be a bad thing

...ent, and in some cases, opposite roles in distinct types of memory storage, and that excess neurogenesis can be detrimental to some memory processes." "We believe these findings have important implications for diverse disciplines ranging from medicine to artificial intelligence," said Dr. Malleret. "In ...

Music genes and musical geniuses

...xist? Why haven’t we all become one? Are there any types of music that are objectively better suited to be more appreciated than others? And especially what is the purpose of music? These and other questions will be addressed by geneticists, psychologists, biologists, but also anthropologists and musicolog...

New UD technology removes viruses from drinking water

... how to scale it up. I study how viruses and other types of colloidal particles are transported in water, and Kali knows all about waterborne pathogens. "Our hope is that the technology we've developed will help people in our country and around the world, especially in developing countries," Jin noted. ...

Ape gestures offer clues to the evolution of human communication

...riant," Pollick continued. By studying similar types of communication in closely related species, researchers are able to determine shared ancestry. We know gestures are evolutionarily younger than facial expressions and vocalizations, as shown by their presence in apes and humans but not in monkeys. "...

Human preference for other species could determine whether they survive

...xedo pinning on a red carnation. Unlike some other types of animals, human preference for particular penguin species does not seem to be driven by a "cuteness" factor. The four books Stokes examined were published in the last decade and were aimed at the popular adult audience. He eliminated photograph...

MIT bioengineer advances survival, promise of adult stem cells

...the feasibility for near-term clinical use for the types of cells she investigates. However, she also avoids research with human embryonic stem cells following a personal experience with in vitro fertilization almost 10 years ago. "Like some other scientists I know, my personal views about creating hu...

Molecular motors and brakes work together in cells

...ubules are structures that help give shape to many types of cells, form the spindle -- a structure important in cell division -- and act as a railroad, of sorts, upon which molecular motors move protein packages for waste removal and nerve transmission. In the Cell study, the investigators, working wit...

Common cold virus may kill breast cancer cells

...e to selectively target and destroy many different types of cancer cells, including breast cancers, whilst leaving normal cells unaffected," she said. Debilitating symptoms associated with conventional treatments (such as nausea, vomiting and hair loss) could also be avoided by using the Coxsackie virus....

On automatic pilot

...cle. Nerve cells in the cerebellum receive two types of signals. Through the climbing fibres, signals from a specific structure in the brain stem are transmitted to Purkinje cells located in the cerebellar cortex. Mossy fibres transmit signals from various parts of the central nervous system to the gra...

White blood cells of cancer-resistant mice overwhelm natural defenses of cancer cells

...chool of Medicine and colleagues said that several types of white blood cells in the mice attack cancer cel...hese cancer-resistant mice, three white-blood-cell types of the innate immune system ?neutrophils, macrophages and natural killer cells ?all infiltrate the t...

Stress hormones may play new role in speeding up cancer growth

...hey studied tumor samples which included different types of NPC tumors. All had the sought-after receptors. "From this we can say that there is likelihood that all NPC tumors will have these receptors as well," he said. "MMP-2 and MMP-9 contribute to the aggressiveness of these tumors," Yang said. "I...

U of MN researchers turn cord blood into lung cells

...ded in culture, then differentiated into different types of tissue representative of all three embryonic lineages, endoderm, mesoderm and ectoderm. In this series of experiments, McKenna and his group cultured the MLPC and differentiated it into the lung cells, an endoderm-type cell. By testing the cell...

St. Jude announces breakthrough in eye cancer treatment

...alled the p53 pathway triggered apoptosis in other types of cancer cells, but not in retinoblastoma. However, the St. Jude team proved not only that the p53 pathway was activated in early-stage retinoblastoma, but that excessive levels of a molecule called MDMX blocked it from triggering apoptosis in more ...

Gene key to taste bud development identified

...cells that can develop into several different cell types depending on what biochemical instructions they receive. "Not only did we find that SOX2 is crucial for the development of taste buds, but we showed that the amount of SOX2 is just as important," said Brigid Hogan, Ph.D., chair of the Duke Universi...

Cloned mice created from fully differentiated cells, a milestone in cloning research

...ecoming like a seed that can give rise to all cell types necessary for the development of an entire organism," adds co-corresponding author Dr. Cheng, associate professor of radiation oncology at the University of Pittsburgh School of Medicine and director of stem cell biology and co-leader of the cancer s...

Key to zebrafish heart regeneration uncovered

...ok in nature, there are many examples of different types of organisms, such as axolotls, newts and zebrafis...e damaged by disease or heart attack. "Multiple types of progenitor cells have been identified within the mammalian heart, yet it displays little or no re...

Interaction between lymph and liver cells may affect immune response

...mphocytes. The mouse livers were examined with two types of electron microscopy. Analysis of the images showed a large number of intrahepatic lymphocytes (IHLs) that had extensions similar to the dimensions of the fenestrations of the LSECs. These extensions were seen within the fenestrations and were obse...

Growth factor stimulates rapid extension of key motor neurons in brain

...tor known to be important for the survival of many types of cells stimulates rapid extension of corticospin.... Since they are embedded among hundreds of other types of neurons in the cerebral cortex, it has been difficult to study CSMN, and little has been known ab...

Early-stage immune system control of HIV may depend on inherited factors

...ted with HIV, first determining their specific HLA types by DNA analysis. Then they focused on 173 HIV protein fragments known to bind to those HLA types to see if particular peptides were more powerful in activating the HIV-specific CD8 response. T...

OHSU researchers demonstrate how white blood cells cannibalize virus-infected cells

...most any infected cell, they prefer to eat certain types of cells but not others. For instance, we noted that CD8+ T-cells consumed other white blood cells such as infected B-cells, but they were not fond of eating infected fibroblasts, a type of cell found in connective tissue. They're sort of like a 5-ye...

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