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Tag: "couples" at biology news

Electric fish conduct electric duets in aquatic courtship

... in the battle of the sexes, African electric fish couples not only use specific electrical signals to court but also engage in a sort of dueling "electric duet." The study is the first to compare electrical and behavioral displays in breeding and nonbreeding Brienomyrus brachyistius, a type of mormyrid ele...

Researchers find gene mutation that causes infertility in male mice

Up to 15 percent of couples of childbearing age struggle with the heartache of infertility. Now there is the promise of new hope with Cornell researchers' identification of a mutation in a gene that causes male infertility in mice. Because this is the first time that a dominant...

Robotic therapy helps restore hand use after stroke

...ects. The robotic device wraps around the hand and couples with a computer program that directs patients though a physical therapy program. HOWARD users initiate hand motion, with the robot monitoring and assisting the activity in order to meet therapeutic goals. "The HOWARD therapy isn't passive; the pa...

Tumor-suppressor gene is critical for placenta development

...e and a second gene, E2f3. The Rb protein normally couples with, or binds to, the protein encoded by the E2f3 gene. Embryos missing both genes lived three days longer than the embryos missing Rb only, but all died before birth. "This showed that the interaction of these two proteins is definitely importan...

Anti-herpes treatment reduces HIV levels in women infected with both viruses

...ring direct transmission of HIV between discordant couples in several sites worldwide. Dr Philippe Mayaud, one of Dr Nagot's colleagues at the LSHTM concludes: 'Our results have important potential implications for public health and clinical practice, as HSV-2 control could become a new form of HIV preven...

Many couples choose to donate surplus embryos for stem cell research

Nearly 50% of couples who were interviewed at least 3 years after underg...ith a legal advisor and embryologist, which helped couples navigate the confusing legal situation and address any concerns they might have had about donation f...

New study is first to link romantic relationships to genes

...whether MHC similarity among romantically involved couples predicted aspects of their sexual relationship. "As the proportion of the couple's shared genotypes increased, womens' sexual responsivity to their partners decreased, their number of extra-pair sexual partners increased and their attraction to men o...

Nobel Laureate finds 'elegant' explanation for DNA transcribing enzyme's high fidelity

...tions fail. The trigger loop mechanism therefore couples NTP recognition and catalysis, ensuring the fidelity of transcription, they reported. “Of all revelations from the structure [of the transcription machinery] since it was first solved, this is perhaps the most fundamental since it gets at the under...

Particle size matters to bacteria ability to immobilize heavy metals

...breathe. This is the first study by any group that couples environmental microbiology and nano-mineralogy. "This adds to our understanding of how nanoparticles might influence the environment and contaminant metal mobility in our rivers, lakes and other surface waters, as well as groundwater," said Bose. ...

UNC scientists solve mystery of how largest cellular motor protein powers movement

... spring-like “coiled-coil?region within dynein. It couples the motor protein to the distant ATP site. “This dynein coiled-coil was completely missing from all previous studies. We saw it could allow a very rapid transduction of chemical energy into mechanical energy,?Dokholyan said. Conversion to mecha...

Embryo tests give parents the choice

...r cent of fertility clinics in the US are allowing couples to choose the sex of their child, a survey conducted by the Genetics and Public Policy Center (GPPC) in Washington DC suggests. The testing method, called preimplantation genetic diagnosis (PGD), was originally designed to test for severe or deadly d...

Fertility hope as study shows eggs survive in older ovaries

...ility conditions," he said. One in six Australian couples faces some form of infertility. Due to the limitations and sensitivity of human ovaries, few studies have been conducted into the factors that influence egg survival, growth or death in relation to fertility. ...

Activation of microRNA inhibits cancer gene in human cancer cells

...lts suggest an effect of epigenetic treatment that couples inhibitors of DNA methylation and histone deacetylation to induction of some miRNAs. These miRNAs can potentially regulate expression of target genes that are important in the development and progression of human cancer. Further studies on epigenetic...

New egg freezing technique offers hope to hundreds of women

...diseases, and thousand of babies have been born to couples where the male is an infertile survivor of cancer treatment. With the current techniques, women would need to freeze hundreds of oocytes in order to have a reasonable chance of obtaining a child, but by using the technique of Dr Kuwayama and his coll...

Nutrition a major factor in rise in twin pregnancies

...s had conducted work that throws light on why some couples prefer double embryo transfer (DET), despite being...gher than perinatal death. Our work suggests that couples may need to be convinced that their chances of live birth with single embryo transfer are as high as...

US woman gives birth to baby from world's first frozen donor egg bank

...essfully freeze and thaw donor sperm for infertile couples has been available for decades. However, the techn...c Director for CEI, has worked with many infertile couples over the past six years as he successfully developed and improved egg-freezing technology to allow f...

Data published in PNAS show antibodies can be made 10 times more toxic to cancer cells

...red using the company's XmAb TM technology, which couples computational design algorithms with high-throughput screening to rationally design the antibody constant region. The Fc portion of the constant region of the antibody has been shown in previous studies to be responsible for mediating antibody-depen...

Gene variation increases SIDS risk in African Americans

...-threatening events, siblings of SIDS victims, and couples that experience infertility or fetal demise." ...

UC San Diego partners with Venter Institute to build marine microbial genomics cyberinfrastructure

...next-generation science data server complex, which couples the Calit2 and SDSC middleware, compute, and storage capabilities with the NSF's TeraGrid distributed, high- performance computing facility in a unified Service Oriented Architecture. SDSC's Philip Papadopoulos noted that, "the CAMERA complex will ha...

Hormonal male contraception reversible after few months for all men

...hdrawal, and vasectomy) are not acceptable to many couples because they are either not sufficiently reliable or not easily reversible. In a similar way to ovulation suppression by hormone treatment in women, sperm production can be fully inhibited by androgen or androgen-progestagen treatment combinations in...

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