Tag: "stems" at biology news

JCI table of contents, February 2, 2004

...Centre, Australia, demonstrate that both epidermal stems cells and their early, differentiated progeny contribute to rapid epidermal regeneration. The majority of proliferating epidermal cells, also known as transit-amplifying cells, at the inner-most layer of the skin have a finite life span and undergo r...

Skin regeneration not isolated to epidermal stem cells

...Centre, Australia, demonstrate that both epidermal stems cells and their early, differentiated progeny contribute to rapid epidermal regeneration. The majority of proliferating epidermal cells, also known as transit-amplifying cells, at the inner-most layer of the skin have a finite life span and undergo r...

JCI Table of Contents, January 15 2004

...is may develop from cells derived from bone marrow stems cells, rather than parenchymal lung fibroblasts. The authors induced pulmonary fibrosis in mice that had been altered with bone marrow labeled with a fluorescent green marker protein. In these mice, cells derived from bone marrowderived stem cells fl...

Changes in shape of single protein plays key role in the spread of cancer cells

...y to alter its shape to meet the demands of a task stems from the series of gracefully curling segments--each one of which is called a helix---that makes up much of the structure of this protein. "Vinculin resembles a series of cylinders held together by threads," Izard said. Vinculin changes its shape b...

First phylogeographic study of a rainforest tree

...hylogeographic structure in the Panamanian Isthmus stems from its history as a land bridge between Central America, South America, and the proto-Isthmian archipelago of islands, which were connected approximately 3 million years ago. The authors suggest that same history may explain the high leve...

Fox Chase Cancer Center researcher develops new model for studying prions mad cow disease

...g process. Each disease involving amyloid fibrils stems from the misfolding of a different protein that then packs into a similar structure. The formation of amyloid fibrils is linked to a wide range of diseases, not only BSE and CJD but also Alzheimer's disease, Type II diabetes and Parkinson's disease....

Research on spleen cells could yield potential cure for Type 1 diabetes

...ished in the Nov. 14 issue of Science, the finding stems from a study conducted by Denise Faustman, M.D., Ph.D., director of Massachusetts General Hospital (MGH) Immunobiology Laboratory and chair of the Society for Women's Health Research (SWHR) board of directors. The finding builds on a 2001 study condu...

Genetic aberration helps explain variation in cystic fibrosis

... the disease's severity. Cystic fibrosis, or CF, stems from mutations in a gene called CFTR, short for cystic fibrosis transmembrane conductance regulator. When specific mutations appear in both copies of the gene, a sticky mucus builds up in the lungs, making breathing difficult and trapping bacteria th...

New gene necessary for plant growth and development discovered

...plays important roles in the development of roots, stems and leaves, but either too much or too little auxin interferes with development. Zhao thinks this could have implications for the design of novel flowers and other plant structures. "Some had leaves that developed into striking trumpet-like shapes,"...

Critical Therapeutics announces issuance of US patent for novel anti-inflammatory technology

...cerative colitis and sepsis. Patent No. 6,610,713 stems from research conducted by the inventor - CTI co-founder Kevin J. Tracey, M.D. - and his colleagues at North Shore-Long Island Jewish Research Institute's Laboratory of Biomedical Research. CTI in-licensed exclusive rights to the patent from the Inst...

Molecule identified that contributes to essential cell functioning process

...hal to the cell." Marzluff's focus on histone mRNA stems largely from his team's 1996 discovery and cloning of the stem-loop binding protein SLBP. A major regulatory player in histone mRNA expression, SLBP latches onto the looped tail of histone mRNA and signals the synthesis of histone proteins. In additi...

Fishing for photos of rare or unknown deep-sea creatures with an electronic jellyfish lure

...ht, or bioluminescence. This scientific deficiency stems from not only a lack of exploration and study of the oceans, but also from less than ideal traditional research methods. Deep-towed nets can shred animals like jellyfish or damage captured animals to the point that their natural behaviors cannot be o...

Unraveling the genetics of fusiform rust

...hat forms spindle-shaped galls on the branches and stems of pine trees, is endemic to the southern U.S., oc...isease also weaken and deform older trees, causing stems to break during high winds. Economic losses from fusiform rust are estimated at $28 million a year. ...

UCSD biologists discover key step for 'designer plants' that could clean up heavy metals

... heavy metals can be transported from the roots to stems and leaves, a finding that brings the possibility ...m up, and the metals need to be transported to the stems and leaves of the plant, and stored there. We have found that phytochelatins, chemicals produced by ...

Search beneath lawns provides insight into backyard biodiversity

...think of grubs and weevils devouring the roots and stems of their manicured turf, but when Loren B. Byrne, graduate student in the intercollege ecology program at Penn State, thinks about what is under the lawn, he sees much smaller organisms that are beneficial for the soil and lawn. "Turfgrass lawns are...

How a little bit of cold can kill a big manatee, and what it might mean for the species

...ion. The team found that the cold stress syndrome stems from a cascade of physiological events and diseases initiated by cold water and manatees' limited ability to adapt to low temperature extremes. The study suggests that the animal's metabolism slows, leading to digestion problems, decreased appetite,...

Brain stem cells are not rejected when transplanted

...nto neuraltissue. They concluded that these neural stems cells did not induce an immuneresponse and must be invisible to the immune system, at least initially. Thenext step was to determine if the cells possessed the antigens that mostother tissues had. To test this theory, the team took other brain cells ...

Salk scientists identify pathway that determines when plants flower

...seeds. The byproduct of this process is that plant stems grow longer and leaf volume declines, leading to decreases in biomass and yield. To understand the biology behind this process, the Salk scientists looked at a group of phytochromes, photoreceptors in plants that trigger the "shade-avoidance respons...

JCI table of contents, July 1 2003

...ntiation of human bone marrowderived hematopoietic stems cells (HSCs). The researchers demonstrated that the use of low oxygen levels in vitro improved bone marrow cell survival compared to survival under normal oxygen levels, and also allowed increased expansion of these cells by more than 4-fold normal l...

Don't ban embryo-based research says new chairman of European fertility organisation

... likely always to be a need to use embryo-isolated stems for specific projects." He said it was still early days and the clinical potential of human embryonic stem cells and transdifferentiated adult stem cell was as yet unknown. "It's not an either/or situation. Most scientists working with stem cells, wh...

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