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Tag: "migrating" at biology news

Researchers reveal the infectious impact of salmon farms on wild salmon

...he salmon farm by studying the infection levels of migrating juvenile pink and chum salmon as they approached a...spread of sea lice amongst the adult fish. For the migrating wild salmon, the farm is a concentrated point source of infectious lice larvae. "We found lice leve...

In the migratory marathon, parasitized monarchs drop out early

...tion : infected monarchs quite don't make it while migrating long distances, so they can't propagate the infection once arrived at destination. A little-studied outcome of animal migration is whether these long journeys can limit the spread of parasites by weeding out diseased animals. Monarch butterflies in...

Migratory songbirds have a specialized night-vision brain area

...for the impressive navigational abilities of birds migrating during the night. In future studies, Jarvis, Mouritsen and their colleagues plan to test this hypothesis in more detail, they said. ...

Pair of cancer genes found to drive both cell migration and division

...each other. "Essentially, the two halves are like migrating cells - PIP3 levels are high on the sides that represent the 'fronts' of what will be two new cells, and they are low at the furrow, or what amounts to the back of the new cells," says Devreotes. In their experiments, cells without PTEN and PI3K cou...

New understanding of cell movement may yield ways to brake cancer's spread

...ous studies by us and others have identified how a migrating cell 'gets its wheels' and, mechanistically, is able to move. In this study, we have now determined how these wheels become pointed in the right direction", said Vuori. "We now know this is done using a protein that holds true in most cellular system...

Researchers discover stem cell 'guide' that may be key for targeting neural stem cell treatments

...one of the first endogenous guidance molecules for migrating neurons in the adult brain," Zhou said. "We are learning that molecules, like PK2, which direct the movement of neurons are crucial for neuronal replacement, and they demonstrate how adult stem cells might be manipulated for this process." PK2 accom...

New tool reveals secrets of migrating cells

...low researchers in many fields of biology to track migrating cells, which biologists have discovered are common... keeping the intact organ alive and make movies of migrating cells." With two-photon imaging, Witt and Robey identified thymus cells they dubbed beeliners movin...

Malfunctioning bone marrow cells sabotage nerve cells in diabetes

...de the pancreas, and wondered why these cells were migrating to other organs and whether they were detrimental or beneficial," said Chan. In pursuit of this curious phenomenon, Drs. Tomoya Terashima and Hideto Kojima from BCM and Dr. Mineko Fujimiya of Shiga University of Medical Science in Shiga, Japan, in c...

The ecological effects of the Chernobyl disaster

...active strontium and radioactive cesium, comparing migrating populations with those that remain in the area, as well as examining age, sex, and nesting preferences to determine the amounts and types of radiation accumulating in the birds. In the presentation, Gaschak will discuss how quantities of 90Sr and 137...

Displaced songbirds navigate in the high Arctic

...e summer. White-crowned sparrows are nocturnally migrating birds that breed in northern Canada and perform long migrations covering a few thousand kilometers to winter in the southern United States. In the study, young and adult white-crowned sparrows were captured with mistnets near Inuvik, NW Territories, ...

Einstein scientists discover how protein crucial for motion is synthesised at the right place in the cell

... Stefan Huettelmaier, the research team focused on migrating fibroblast cells important in wound healing. To move towards a wound, these cells manufacture the protein actin, which polymerizes into long filaments that push the cell's membrane outward to form protrusions. The team's previous work showed how ne...

Prostate cancer uses Wnt signaling proteins to promote growth of bone tumors

...r bones. But scientists know very little about how migrating prostate cancer cells set up housekeeping in bone tissue and produce the dense bony lesions characteristic of prostate cancer. Now, new research by scientists at the University of Michigan's Comprehensive Cancer Center suggests that prostate cancer ...

Neurons find their place in the developing nervous system with the help of a sticky molecule

...ied a molecule expressed on the surface of certain migrating neurons that helps them find their correct positio...howed that MDGA1 is expressed on subpopulations of migrating neurons throughout the developing nervous system, including layer 2/3 neurons in the neocortex, sugg...

Enzyme inhibitors block replication of SARS virus

...pected of originating in animal populations before migrating to humans. Hardest-hit were six Asian nations. By the time the epidemic had been controlled in 2003, the disease infected more than 8,000 people, causing 800 deaths. There is no current effective treatment or vaccine. Researchers have known since 2...

Malaria parasites develop in lymph nodes

...speed that is amongst the fastest recorded for any migrating cell. After leaving the skin, the parasites frequently invaded blood vessels. That was no surprise to Ménard, since they need to travel through blood vessels to get to the liver. However, many of the parasites also invaded lymphatic vessels. About 2...

Less is more, gene study shows

...idea that it happened not long before humans began migrating out of Africa 40,000 to 60,000 years ago. As for exactly how lacking the gene---which appears to be essential in all mammals except humans---became more advantageous than having the gene, Zhang believes he has an answer. The immune system, he expl...

A new way of looking at molecular motors

... cause disease by preventing developing cells from migrating to their necessary destinations before birth or by preventing parts of the body, such as sperm tails or the tiny hairs that keep mucus flowing in the lungs, from moving when they are supposed to. The motors in parasitic organisms contribute to diseas...

Marrow-derived stem cells deliver new cytokine to kill brain tumor cells, offer protection

...a very powerful anti-tumor response that tracks to migrating glioma islands and offers long-term protection ?all of which would make this a very attractive therapeutic option." In the animal study, bone marrow-derived neural stem-like cells (BM-NSC) genetically engineered to produce IL-23 were injected into i...

Northern birds are fatter!

...n Fraser University, Canada) who has been tracking migrating birds for several years. "This research may have i...re and digestive enzymes between non-migrating and migrating birds, so there might also be similar alterations in migrating bird's physiology further north, whic...

Researchers identify genes in fruitflies that may shed light on human cancer spread

...ape and structure and which become very dynamic in migrating cells; and a group of genes involved in transporting materials from the inside of a cell to its membrane surface and back again. "So-called border cell migration shares common characteristics with metastatic cancer cells," says Xuejiao Wang, M.D., ...

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