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Tag: "onset" at biology news

Scientists find a maturity gene in fly

...t nuclear receptors are critical for the timing of onset of maturation [in flies] is a logical conclusion we could extend to humans," Thummel says. Thummel and colleagues raised fruit flies in vials containing a gelatinous food made of agar, cornmeal, molasses and yeast. The scientists disabled the DHR4 g...

MWG Biotech expands siMAX?siRNA portfolio with new scales, lengths and design tools

...t nuclear receptors are critical for the timing of onset of maturation [in flies] is a logical conclusion we could extend to humans," Thummel says. Thummel and colleagues raised fruit flies in vials containing a gelatinous food made of agar, cornmeal, molasses and yeast. The scientists disabled the DHR4 g...

Immune system has evolved to prevent autoimmune disease

...ist, but that the length of the infection prior to onset of autoimmune disease is highly variable. "Peopl...nt correlation in time, but a long distribution of onset times would lead to weaker statistical correlations, particularly in those cases where the infection...

What Makes The Brain Tick, Tick, Tick: Researchers Gaining New Insights Into Brain's Internal Clock

...rocess the millisecond intervals involved in voice onset time, but also the duration of vowels and consonants. Also, to respond, I need to process the pacing of speech, to organize my thoughts coherently and to respond back to you in a timely manner. That's all interval timing, and in fact it's hard to fin...

Dangerous tricksters: Some bacterie use immune cells to reproduce

...ofessor Haas comments. Within a few days after the onset of the infection, the macrophages die of the infection, they disintegrate and release the multiplied pathogens. The Bonn cell biologists have demonstrated in the past that this cell death is 'necrotic'. This means that cell components escape, attrac...

Scientists pinpoint inflammation gene

...ate the process of arterial wall hardening and the onset of Type 2 diabetes, we are developing an understanding of why obese persons with a faulty SEPS1 gene may be at higher risk of developing heart disease and diabetes," he said. The path to discovery: finding SEPS1 and its influence These groundbrea...

Overfishing may drive endangered seabird to rely upon lower quality food

...oric feathers represent a time period prior to the onset of intensive fishing, decades before the infamous ... molts of feathers each year, one right before the onset of the March through April breeding season, and another after their nesting period ends between Augu...

Olfactory system detects pheromones that control reproduction

...ormone releasing hormone (LHRH). LHRH controls the onset of puberty. In females it also stimulates ovulation and controls the estrus cycle. In males, the hormone controls gonad function, including spermatogenesis and testosterone production. "One of the classical dogmas is that LHRH neurons receive inputs...

The brain is broadly wired for reproduction

...se neurons regulate sexual physiology -- including onset of puberty, ovulation, and the menstrual cycle in females and testosterone production in males -- by regulating the release of hormones from the pituitary gland. Interestingly, GnRH neurons also appear to be involved in the control of sexual behavior...

Stem cell mobilization therapy appears to be ineffective in repairing damage caused by heart attack

... a narrowed coronary artery) within 12 hours after onset of symptoms. Patients were randomly assigned to receive by injection either a daily dose of 10 µg/kg of G-CSF or placebo (an inactive substance) for 5 days. The patients were treated between February 2004 and February 2005. Treatment with G-CSF prod...

Combination therapy improves AIDS-related lymphoma outcome

...lso significantly improves survival and delays the onset of AIDS and AIDS-related cancers, including lymphomas. With the lack of study data to show the efficacy of maintaining HIV-positive patients on HAART while they are treated with chemotherapy for ARL, oncologists are hesitant to expose HIV patients ...

Human prostate grown from embryonic stem cells

...nvironmental factors we believe play a role in the onset of prostate disease," said Prue. "We grew the prostate tissue by 'telling' the embryonic stem cells how to become a human prostate gland. We then implanted the cells into mice, where they developed into a human prostate, secreting hormones and PSA; ...

Alcoholism, smoking and genetics among Plains American Indians

... shown that the Met allele is associated with late onset alcoholism and increased alcohol intake in social drinkers, Enoch and her colleagues have found that in American Indians the Met allele was protective against alcoholism, and the Val allele was the risk allele. "The answer to this paradox may lie ...

UCLA scientists find male gene in brain area targeted by Parkinson's

...that variations in SRY levels may be linked to the onset of Parkinson's and could offer insights into who is at risk for the disease. "SRY may serve as a protective agent against Parkinson's," he said. "Men who contract the disease may have lower levels of the gene in the brain." Because SRY is found onl...

Study finds drug may cut down involuntary movements

...Patients usually live for 15 to 20 years after the onset of symptoms. "Tetrabenazine does not help all the features of Huntington's disease, and other medications are commonly needed to improve mood and behavior. For those Huntington's disease patients whose function is impaired by chorea, however, tetra...

Malaria parasites develop in lymph nodes

...er cells and infect red blood cells, beginning the onset of malaria. Although researchers understand this life cycle, no one has measured directly how many parasites a mosquito bite transmits or where else in a mammal's body they travel, said Ménard. To find out, he and his colleagues infected mosquitoe...

U of MN researchers identify ataxia gene

...eloping ataxia sometime during their lifetime. The onset of SCA5 usually occurs between the ages of 30 and ...ar earlier or later in life, with reported ages of onset ranging from 4 to more than 70 years of age. Now that researchers have identified the specific mu...

New compound stops brain cell degeneration in Alzheimer's disease

...pproach that has the potential to modulate disease onset and progression, the researchers said. Decline of cognitive functions linked to the part of the brain called the hippocampus is a clinical hallmark of Alzheimer's disease. The report demonstrates that targeting excessive glial activation can suppres...

Why nerve cells work faster than the theory allows

...igh variability of the threshold value and a rapid onset of the action potential cannot be unified in this ...eed of initiation of the action potential. A rapid onset is only obtained, when the variability of the threshold value is low. In order to recreate the obs...

Key heart and Alzheimer's disease protein imaged for first time in native state

...ases from 20 to 90 percent, and the typical age of onset decreases from 84 years to 68 years. The presence of one apoE4 allele results in an estimated 45 percent chance of developing Alzheimer's by 85 years of age. With two apoE4 alleles, the risk increases to 50?0 percent. "Insights into the basic biolog...

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