Deleting a particular ion channel from sperm cells causes those cells to lose the power needed for fertilization, researchers at UT Southwestern Medical Center at Dallas found while expanding studies into male infertility.
These findings, which could eventually lead to more effective forms of contraception, are currently available online and will appear in the Dec. 9 issue of the Proceedings of the National Academy of Sciences.
In studies on mice, disrupting a gene that contains a putative calcium-permeable ion channel – identified in earlier research as CatSper2 – did not change normal sperm cell production or basic sperm motility, or movement. It did, however, prevent the appearance of a stimulated form of sperm motility, called hyperactivation, normally seen near the time of fertilization. Sperm cells were, thus, incapable of generating the power needed to penetrate an egg cells extracellular matrix, or outer shell, which is necessary for fertilization.
Donna Steph Hansard | EurekAlert!
Zap! Graphene is bad news for bacteria
23.05.2017 | Rice University
Discovery of an alga's 'dictionary of genes' could lead to advances in biofuels, medicine
23.05.2017 | University of California - Los Angeles
An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.
We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...
Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.
Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...
An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...
In the race to produce a quantum computer, a number of projects are seeking a way to create quantum bits -- or qubits -- that are stable, meaning they are not much affected by changes in their environment. This normally needs highly nonlinear non-dissipative elements capable of functioning at very low temperatures.
In pursuit of this goal, researchers at EPFL's Laboratory of Photonics and Quantum Measurements LPQM (STI/SB), have investigated a nonlinear graphene-based...
Dental plaque and the viscous brown slime in drainpipes are two familiar examples of bacterial biofilms. Removing such bacterial depositions from surfaces is...
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22.05.2017 | Event News
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23.05.2017 | Physics and Astronomy
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23.05.2017 | Medical Engineering