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2019 Breakthrough Prize winners set to receive share in $22 million

Genetically modified organisms (GMO) - ср, 2018-10-17 16:00
Silicon valley’s Breakthrough Prize reveals the 21 scientists who have been recognized this year for work in drug design, biology, astrophysics, and mathematics
Категории: Science and society

Human placenta stem cells help people recover from hip surgery

Genetics - ср, 2018-10-17 14:30
The placenta is usually discarded after childbirth but it's a source of mesenchymal stem cells – and they help people regain muscle strength after hip surgery
Категории: Biology

Human placenta stem cells help people recover from hip surgery

HIV and AIDS - ср, 2018-10-17 14:30
The placenta is usually discarded after childbirth but it's a source of mesenchymal stem cells – and they help people regain muscle strength after hip surgery
Категории: Healthcare, Science and society

Human placenta stem cells help people recover from hip surgery

Genetically modified organisms (GMO) - ср, 2018-10-17 14:30
The placenta is usually discarded after childbirth but it's a source of mesenchymal stem cells – and they help people regain muscle strength after hip surgery
Категории: Science and society

Gravitational waves from black hole pairs could act like tractor beams

Genetics - ср, 2018-10-17 13:50
When two black holes orbit one another, they create a swirling vortex of gravitational waves that could trap any nearby objects like a sci-fi tractor beam
Категории: Biology

Gravitational waves from black hole pairs could act like tractor beams

HIV and AIDS - ср, 2018-10-17 13:50
When two black holes orbit one another, they create a swirling vortex of gravitational waves that could trap any nearby objects like a sci-fi tractor beam
Категории: Healthcare, Science and society

Gravitational waves from black hole pairs could act like tractor beams

Genetically modified organisms (GMO) - ср, 2018-10-17 13:50
When two black holes orbit one another, they create a swirling vortex of gravitational waves that could trap any nearby objects like a sci-fi tractor beam
Категории: Science and society

Sneak peek at Hawking’s last book, Brief Answers to the Big Questions

Genetics - ср, 2018-10-17 13:00
Do black holes eat information or do zero-energy particles nicknamed "hairs" somehow store it instead? Before he died, Stephen Hawking was working on new ideas, as this exclusive extract shows
Категории: Biology

Sneak peek at Hawking’s last book, Brief Answers to the Big Questions

Genetically modified organisms (GMO) - ср, 2018-10-17 13:00
Do black holes eat information or do zero-energy particles nicknamed "hairs" somehow store it instead? Before he died, Stephen Hawking was working on new ideas, as this exclusive extract shows
Категории: Science and society

Male birds can be good singers or good looking, but not both

HIV and AIDS - ср, 2018-10-17 01:01
The prettier the bird, the worse it sings. A study of over 500 species has revealed that birds evolve to attract mates in one of two ways, and don’t combine them
Категории: Healthcare, Science and society

Special coating gives condoms self-lubricating powers

HIV and AIDS - ср, 2018-10-17 01:01
A polymer coating turns condoms slippery once it comes in contact with body fluids – and it doesn’t dry out
Категории: Healthcare, Science and society

Male birds can be good singers or good looking, but not both

Genetically modified organisms (GMO) - ср, 2018-10-17 01:01
The prettier the bird, the worse it sings. A study of over 500 species has revealed that birds evolve to attract mates in one of two ways, and don’t combine them
Категории: Science and society

Special coating gives condoms self-lubricating powers

Genetically modified organisms (GMO) - ср, 2018-10-17 01:01
A polymer coating turns condoms slippery once it comes in contact with body fluids – and it doesn’t dry out
Категории: Science and society

Male birds can be good singers or good looking, but not both

Genetics - ср, 2018-10-17 01:01
The prettier the bird, the worse it sings. A study of over 500 species has revealed that birds evolve to attract mates in one of two ways, and don’t combine them
Категории: Biology

Special coating gives condoms self-lubricating powers

Genetics - ср, 2018-10-17 01:01
A polymer coating turns condoms slippery once it comes in contact with body fluids – and it doesn’t dry out
Категории: Biology

Wildlife photography prize goes to stunning picture of golden monkeys

HIV and AIDS - ср, 2018-10-17 00:00
Hellbenders, vampire finches, and mud-daubers were among animals depicted in winning photographs in the 2018 Wildlife Photographer of the Year competition
Категории: Healthcare, Science and society

Wildlife photography prize goes to stunning picture of golden monkeys

Genetically modified organisms (GMO) - ср, 2018-10-17 00:00
Hellbenders, vampire finches, and mud-daubers were among animals depicted in winning photographs in the 2018 Wildlife Photographer of the Year competition
Категории: Science and society

Wildlife photography prize goes to stunning picture of golden monkeys

Genetics - ср, 2018-10-17 00:00
Hellbenders, vampire finches, and mud-daubers were among animals depicted in winning photographs in the 2018 Wildlife Photographer of the Year competition
Категории: Biology

Nicotine exposure of male mice produces behavioral impairment in multiple generations of descendants

PLOS Biology (new articles) - вт, 2018-10-16 23:00

by Deirdre M. McCarthy, Thomas J. Morgan Jr., Sarah E. Lowe, Matthew J. Williamson, Thomas J. Spencer, Joseph Biederman, Pradeep G. Bhide

Use of tobacco products is injurious to health in men and women. However, tobacco use by pregnant women receives greater scrutiny because it can also compromise the health of future generations. More men smoke cigarettes than women. Yet the impact of nicotine use by men upon their descendants has not been as widely scrutinized. We exposed male C57BL/6 mice to nicotine (200 μg/mL in drinking water) for 12 wk and bred the mice with drug-naïve females to produce the F1 generation. Male and female F1 mice were bred with drug-naïve partners to produce the F2 generation. We analyzed spontaneous locomotor activity, working memory, attention, and reversal learning in male and female F1 and F2 mice. Both male and female F1 mice derived from the nicotine-exposed males showed significant increases in spontaneous locomotor activity and significant deficits in reversal learning. The male F1 mice also showed significant deficits in attention, brain monoamine content, and dopamine receptor mRNA expression. Examination of the F2 generation showed that male F2 mice derived from paternally nicotine-exposed female F1 mice had significant deficits in reversal learning. Analysis of epigenetic changes in the spermatozoa of the nicotine-exposed male founders (F0) showed significant changes in global DNA methylation and DNA methylation at promoter regions of the dopamine D2 receptor gene. Our findings show that nicotine exposure of male mice produces behavioral changes in multiple generations of descendants. Nicotine-induced changes in spermatozoal DNA methylation are a plausible mechanism for the transgenerational transmission of the phenotypes. These findings underscore the need to enlarge the current focus of research and public policy targeting nicotine exposure of pregnant mothers by a more equitable focus on nicotine exposure of the mother and the father.
Категории: Biology, Journals

Nicotine exposure in male mice may trigger ADHD in their offspring

Genetically modified organisms (GMO) - вт, 2018-10-16 20:00
Mice are more active and have attention problems if their fathers had nicotine in their diet, perhaps because the chemical triggers epigenetic changes in sperm
Категории: Science and society