Hypoxia in Biological News

NOAA forecast predicts large 'dead zone' for Gulf of Mexico this summer

... 1990 and currently oversees the two national hypoxia programs authorized by the Harmful Algal Bloom and hypoxia Research and Control Act. Data from the U.S. ... is available on the NOAA's Gulf of Mexico hypoxia Watch Web page. The objective ...

U-M researcher and colleagues predict large 2009 Gulf of Mexico 'dead zone'

... in bottom and near-bottom waters. The Gulf hypoxia research team is supported by the U.S. National ... Bay shaped Scavia's 2009 forecast for that hypoxia zone. The Bay's oxygen-starved zone is ... nitrogen, which remains one of the key drivers of hypoxia in the Bay." Farmland runoff containing ...

Simple drug treatment may prevent nicotine-induced SIDS: Study

... increasing the newborn's ability to respond to hypoxia and likely reducing the incidence of SIDS. The ... those episodes, specific proteins sensitive to hypoxia stimulate the cell to release catecholamines. A ... glands do not release catecholamines during hypoxia for example during birth or a self-asphyxiation ...

TGen Clinical Research Services at Scottsdale Healthcare and Mayo Clinic study new cancer drug

... condition characteristic of cancer cells hypoxia (lack of oxygen). The drug candidate may provide ... studies have shown that higher levels of tumor hypoxia correlate with poor treatment outcomes for a variety of solid tumors. It is believed that hypoxia may severely limit the curability of tumors. ...

Study shows continued spread of 'dead zones'

... largest dead zone, in the Baltic Sea, experiences hypoxia year-round. Chesapeake Bay experiences seasonal, summertime hypoxia through much of its main channel, occupying about ... 5% of its volume. Diaz and Rosenberg note that hypoxia tends to be overlooked until it starts to affect ...

A new gene trigger for pregnancy disorder identified

... preeclampsia, says Kalluri. During pregnancy, hypoxia is associated with the formation of new blood ... when the fetus is undergoing rapid development, hypoxia levels are high. As the pregnancy progresses, hypoxia levels should naturally come down as fetal blood ...

Researchers confirm dead zone off Texas coast since 1985

... the cause of dead zones since 1985, he adds. hypoxia oxygen-depleted water occurs when the oxygen ... that were even one-half of that, meaning severe hypoxia has occurred. DiMarco says a comparison would ... samples and to test the concentration levels of hypoxia from several sites. ...

American Chemical Society's Weekly PressPac -- Oct. 31, 2007

... the U. S. Congress and the President a so-called hypoxia Action Plan in 2001, which aimed to reduce the ... model estimates and real-world data from other hypoxia reduction experiences in North Carolina and Hong ... ARTICLE #2 FOR IMMEDIATE RELEASE Reassessing hypoxia Forecasts for the Gulf of Mexico DOWNLOAD PDF ...

Gulf of Mexico dead zone to be studied by University of Texas at Austin marine scientists

... through NOAAs Northern Gulf of Mexico (NGOMEX) hypoxia and Ecosystems Research Program. UTMSI ... accurate models that predict the development of hypoxia on the Louisiana continental shelf. The ... Thomas and Buskey are studying the impacts of hypoxia on the biology of fish and benthic invertebrates, ...

Low oxygen in coastal waters impairs fish reproduction

... Society B. Laboratory studies showed that hypoxia caused endocrine disruption through decreasing ... This study suggests that when persistent coastal hypoxia occurs, there is a potential long-term threat to ... will aim to further elucidate the effects of hypoxia on fish endocrine and reproductive systems at the ...

Protein regulates movement of mitochondria in brain cells

... transport of mitochondria in neuron cells. The protein, which they dubbed hypoxia upregulated mitochondrial movement regulator (HUMMR), is produced in a ... sit at somewhere between 2-5% oxygen. This creates a "normal" state of hypoxia in the brain. However, the concentration of oxygen in the brain can ...

Pacific coast turning more acidic

... that continue the process. There is a strong correlation between recent hypoxia events off the Northwest coast and increasing acidification, Hales said. The hypoxia is caused by persistent upwelling that produces an over-abundance of ...

USF professor gives historical look at physiology and WWII air war

... feet, roughly the height of Mount Everest, the crews suffered hypoxia from the lack of oxygen and decompression sickness from the low pressure, ... to safely provide pressurized oxygen to air crews, helping them avoid hypoxia and decompression sickness. Ways to develop better fitting oxygen ...

Holding breath for several minutes elevates marker for brain damage

... suggests that holding one's breath for a long time disrupts the blood-brain barrier, they said. The concern is that repetitive exposures to severe hypoxia (lowered oxygen supply), such as that experienced by individuals training and competing in static apnea diving events, could cause neurological ...

Experimental treatment halts hypoxic-ischemic brain injury in newborns

... contaminants, into the central nervous system. Dr. Kuan and his colleagues report that elevated tPA activity is triggered earlier in brain hypoxia than other proteases, particularly matrix metalloproteinases, in the progressive molecular process that leads to brain injury. This makes it a better ...

Smaller than expected, but severe, dead zone in Gulf of Mexico

... of the dead zone in a more systematic fashion." "The results of the 2009 cruise at first glance are hopeful, but the smaller than expected area of hypoxia appears to be related to short-term weather patterns before measurements were taken, not a reduction in the underlying cause, excessive nutrient ...

Babies born to native high-altitude mothers have decreased risk of low birth weight

... strategies to increase uterine artery blood flow or to change the way the blood vessels respond during pregnancies that are complicated by hypoxia and/or reduced fetal growth. ...

River delta areas can provide clue to environmental changes, Texas A&M prof says

... the amount of these nutrients from draining into our rivers, but by how much? In this particular case, the linkages between excessive nutrients, hypoxia and their affects on aquatic life are not well understood. "It's a big problem that China is facing right now as it attempts to manage severe water ...

River delta areas can provide clue to environmental changes, Texas A&M prof says

... the amount of these nutrients from draining into our rivers, but by how much? In this particular case, the linkages between excessive nutrients, hypoxia and their affects on aquatic life are not well understood. "It's a big problem that China is facing right now as it attempts to manage severe water ...

Genome projects launched for three extreme-environment animals

... adaptations for alpine-cold tolerance and most specifically for anti-hypoxia and running, making it a key model animal to investigate mammalian hypoxia adaptability. The launch of these sequencing projects not only fills taxonomic gaps for completing an extensive and detailed complete genomic ...

Translating the conversation between the brain and blood vessels

... (high blood pressure). Her Medical College of Georgia laboratory studies the links between conditions such as obesity and the chronic intermittent hypoxia that happens in sleep apnea and chronic activation of the sympathetic nervous system. "We're studying why people who are obese become ...

Sea Grant awards $820,000 for research under EPA's Long Island Sound study

... projects will examine hypoxia--the condition of low oxygen that presents numerous environmental challenges. "The focus on the important issue of hypoxia in Long Island Sound in many of these projects should greatly increase our understanding of the detailed causes of this problem and will be important ...

Researcher seeks to turn stem cells into blood vessels

... Dimes Foundation, which focuses on preventing birth defects, premature births and infant mortality, awarded its grant to Gerecht to study the role of hypoxia during vascular development of human embryonic stem cells. The experiments will be conducted with National Institutes of Health-approved embryonic ...

Brown scientist finds coastal dead zones may benefit some species

... are known to become hypoxic seasonally. He monitored how the species' populations fared during summer and early fall in 2003 and 2004 periods when hypoxia is most likely to occur. Altieri found that all three bivalve species can tolerate mild hypoxic conditions, and that each benefited from some degree ...

Green tea compounds beat OSA-related brain deficits

... administered through drinking water, on rats who were intermittently deprived of oxygen during 12-hour night cycles, mimicking the intermittent hypoxia (IH) that humans with OSA experience. People with OSA have been reported to have increased markers of oxidative stress and exhibit architectural ...

Crop management strategies key to a healthy Gulf, planet

... replenished because of the lack of circulation, Dale said. The more water that flows into the Gulf and the more nutrients in the water, the worse the hypoxia becomes. While scientists initially believed nitrogen was the major culprit, the assessment team for the Science Advisory Board of the ...

USGS April 2008 science picks

... authoritative geographic information is essential in confronting the most pressing natural resource and environmental issues of our nation including hypoxia in the Gulf, wildfires in California, climate change, and natural hazards. Learn about further research and operational development concerning The ...

Fueling ethanol production while protecting water quality

... published in the MarchApril issue of the Journal of Environmental Quality and were also considered in the U.S. EPA Scientific Advisory Boards 2007 hypoxia Advisory Panels report. The group of scientists recommended rigorous implementation of advanced conservation measures to minimize N and P losses ...

Climate change has major impact on oceans

... detect changes in the north Atlantic Meridional Overturning Circulation. Jack Barth, an oceanographer at Oregon State University, reported on the hypoxia events that have plagued the Pacific Northwest coast since 2000. These low-oxygen zones in the near-shore are unprecedented over the last five ...

Oregon researchers study widespread areas of low oxygen off northwest coast

... Eventually, much of this plankton production dies and falls to the seafloor where it decomposes, reducing the waters oxygen content, and causing hypoxia (low oxygen) or even anoxia (no oxygen). ...

Medical breakthrough for organ transplants and cardiovascular diseases by Flemish researchers

... die. However, working with mice, VIB scientists connected to the Katholieke Universiteit Leuven have been able to prevent muscular tissue with severe hypoxia from dying. The muscles seem to adapt to the lack of oxygen - a metabolic tour de force that animals also use when hibernating, but that has remained ...

Elevated nitric oxide in blood is key to high altitude function for Tibetans

... of NO levels in the high and low altitude dwellers are reported in the article, Higher Blood Flow and Circulating NO Products Offset High-altitude hypoxia among Tibetans, in the current Proceedings of the National Academy of Sciences (PNAS). The low barometric pressure of high altitudes generally ...

Breathing easy: When it comes to oxygen, a bug's life is full of it

... San Diego, will speak on the “Genetic basis for hypoxia tolerance in Drosophila melanogaster.?Haddad is ... ways to protect humans who suffer periods of hypoxia due to medical emergency or accidents. Mark ... will speak on “Developmental responses to hypoxia in the insect tracheal system.?Krasnow has ...

'Dead zone' summer killed billions of ocean state mussels

... the reefs' population. Just one month before hypoxia hit, researchers surveyed the same reefs and saw ... for water quality and sea life in the bay. hypoxia can start when fertilizer or sewage spills into ... however, can help control nutrient overload and hypoxia by consuming phytoplankton, which reduces ...

Dead zone area in Gulf could be increasing, researchers say

... hypoxia, which creates the dead zone." hypoxia is a term for extremely low levels of oxygen concentrations in water. hypoxia can result in fish kills and can severely impact ... runoff into the Gulf of Mexico. "We saw no hypoxia in this area until June of last year, and this ...

Tracking sperm whales and jumbo squid

... and the myoglobin in their muscles, so they don’t have to worry about hypoxia at depth." By spending most of their time in cold, deep waters, he ... can take advantage of a vulnerable squid, whether it’s slowed down by hypoxia at depth during the daytime, or at night after it has made a deep dive to ...

Seals protect brain, conserve oxygen by turning off shivering response on icy dives

... better cope with a lack of oxygen (hypoxia). Research into hypothermia and hypoxia is important because they are problems that affect people under a variety ... oxygen levels nearly so low as a seal can. "Somehow they tolerate hypoxia better, we don't know why," Folkow said. The study of how seals handle ...

Ocean 'dead zones' trigger sex changes in fish, posing extinction threat

... Wu says. "In many places, the areas affected by hypoxia are usually larger than the spawning and nursery ... and their reproduction will be impaired." hypoxia is considered one of the most serious threats to ... suggests in many coastal areas and inland waters, hypoxia is primarily caused by agricultural run-off ...

Mice with a migraine show signs of brain damage

... While it’s been widely recognized that CSD underlies some migraines, Nedergaard’s team linked the phenomenon for the first time to both severe hypoxia and to damage to brain cells. As a result of CSD, the team found changes to the synapses, the connections between brain cells known as neurons. The ...