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Tag: "animals" at biology news

A gene's first 'kiss' sets off that affair known as puberty

...puberty, the researchers also found that by giving animals kisspeptin they could, essentially wake up the reproductive hormones from their childhood hibernation. Within 30 minutes of kisspeptin being administered to male monkeys, LH, one of the hormones stimulated by GnRH secretion, was no longer dormant, wi...

Chemists create 'Superbowl' molecule; May lead to better health

... the superbowl molecule has not yet been tested in animals or humans. Until then, no one knows yet when this experimental molecule will actually enter the consumer market, but any useful application is likely to take five to ten years, the researcher estimates. Administration of the molecule for drug deliver...

Spleen may be source of versatile stem cells

...kind of payback that can come fromstudies of lower animals like newts and sponges. Combining theknowledge of Hox11's role in those animals with what we'd found aboutislet cell regeneration in mice helped us find this previously unknownexam...

Lack of enzyme turns fat cells into fat burners

...f mice into fatburners, explaining in part why the animals can eat more and weigh lessthan their normal counterparts, said Baylor College of Medicineresearchers.The report that appears online today in the Proceedings of the NationalAcademy of Sciences. "Westudied the fat cells in these mice bred to lack ACC...

Neuronal 'traffic jam' marks early Alzheimer's disease

...ein. "What we saw quite early in the life of those animals -- well before any plaque deposition -- were obvious axonal defects," said Goldstein. "We saw large swellings in their axons. And when we looked at those swellings using electron microscopy and biochemical markers, they looked just like the axonal tr...

Current human embryonic stem cell lines contaminated UCSD/Salk team finds

...showed how Neu5Gc attached to dietaryproteins from animals could be incorporated into cells lining thestomach and colon, organs where consumption of red meat has beenassociated with risk of cancer."Knowing the mechanism that this molecule uses to get into human cellsmay give us clues to possible solutions to...

Study Links Ebola Outbreaks To Animal Carcasses

...he researchers found that Ebola infections in wild animals such as gorillas, chimpanzees, and occasionally du...wildlife divide through hunters taking either sick animals or carcasses for meat. Hunters can then spread the disease to families and hospital workers, creatin...

Bacteria collection sheds light on urinary tract infections

...ousands of E.coli live in the organs of humans and animals and provide multiple benefits such as aiding in digestion of certain nutrients. However, E.coli is also commonly associated with illnesses caused by eating undercooked beef or drinking contaminated water. Without access to the large collection of ba...

The secret lives of whales

...de an energy source for specialized communities of animals that can last 50 to 100 years. Smith and his coll...n. They were amazed to find hundreds of species of animals encrusting the bones. Some of these species were remarkably similar to the sulfur loving clams, muss...

Dinosaur DNA? New Patent Covers Degraded DNA recovery

...to reassemble everything from prehistoric, extinct animals to unsolved crime scenes. "This discovery, when p...d DNA, we should be able to reconstruct genes from animals such as the wooly mammoth, giant sloth, saber-toothed cat or even from tissues of the Tyrannosaurus ...

Sea skate experiment sheds light on human cell transport

... can apply this knowledge to other cells and other animals ?including humans ?is what makes the findings exciting." In type 1 diabetes, cells lose their ability to transport glucose. Goldstein and Musch say their findings could explain the problem. People with type 1 diabetes don't produce insulin. Without ...

Yale Scientists Find MicroRNA Regulates Ras Cancer Gene

... a regulator of Ras expression. DNA of plants and animals contains sequences encoding microRNAs, important regulators of development, that control processes determining cell type and cell death. "The let-7 microRNA regulates Ras by binding to the message for Ras and likely inhibits translation of the Ras p...

Mouse brain tumors mimic those in human genetic disorder

...ptic pathway began multiplyingand growing when the animals were around three weeks old, developinginto optic pathway gliomas by two months of age. After thattime-period, which is roughly equivalent to teenage years in humans,the cells slowed down to the same growth speed as astrocytes in controlmice."The fac...

Experiments provide proof of how traveling in groups protects insects

Few events involving animals are more dramatic than when they band together and...een the "safety-in-numbers" idea -- that the small animals congregate periodically as a way of protecting themselves from predators such as birds and rodents. ...

Experiments provide proof of how traveling in groups protects insects

Few events involving animals are more dramatic than when they band together and...een the "safety-in-numbers" idea -- that the small animals congregate periodically as a way of protecting themselves from predators such as birds and rodents. ...

Critical role in programmed cell death identified

...cal in mammals because cell death is essential and animals with a cell death defect die. The researchers demonstrated that when they cause worm mitochondria to fragment without instructing cells to die, the cells still die and when they block fragmentation, the cells survive; in other words, blocking fragme...

Elephants imitate truck noises, other animals

... maintaining individual social relationships among animals that separate and reunite over time, like dolphins...e it enables an open communication system in which animals and humans develop new signals with shared associations. Recent playback experiments conducted by Ka...

Elephants imitate sounds as a form of social communication

... maintaining individual social relationships among animals that separate and reunite over time, like dolphins...e it enables an open communication system in which animals and humans develop new signals with shared associations. Recent playback experiments conducted by Ka...

Scientists identify genetic pathways essential to RNA interference

...ne expression. RNAi occurs naturally in plants and animals and may help control resistance to viral infection, among other functions. For the current study, lead author John Kim, PhD, and his colleagues developed a strain of C. elegans into which they added a gene that caused the worms to glow under ultravi...

Same mutation aided evolution in many fish species, Stanford study finds

After decades of laboratory work studying how animals evolve, researchers sometimes need to put on the h...ams, they are an ideal model for understanding how animals adapt to their unique environments. The recent work carries a few surprises. Kingsley said that the...

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