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University of Michigan researchers found that a coating of zinc oxide nanopyramids can disrupt the growth of methicillin-resistant Staphylococcus aureus (MRSA), reducing the film on treated materials by over 95 percent.
Treatment involves either a long course of antibiotics, which can lead to antibiotic resistance and toxic side-effects, or the implants must be surgically replaced, which can be quite extensive for devices such as heart valves and prosthetic joints, VanEpps said. If the nanoparticles are shaped like a pyramid with a hexagon-shaped base, they are very effective at preventing an enzyme called beta-galactosidase from breaking down lactose into the smaller sugars glucose and galactose, which the bacteria use for fuel.
The team's research suggests that part of the nanoparticle—an edge or the point—inserts itself into the groove.
To explore the concept of an antibacterial coating, Kotov's group covered some pegs with the nanopyramids and then VanEpps' team stuck them into a substance that would allow bacteria to grow.
After 24 hours of growth, the number of viable staphylococcal cells recovered from the coated pegs was 95 percent less than those from the uncoated pegs. Staph, including MRSA, is particularly vulnerable to the nanopyramids because its cell wall is a matrix of proteins and sugars. If this is indeed how the nanopyramids operate, then the coating should be no trouble for human cells, whose membrane enclosures don't have the same vulnerabilities. Page Content Zone 1?VIB researcher Mohamed Lamkanfi, connected to the Ghent University, discovered that mice that do not produce the receptor protein NLRP6, are better protected against bacterial infections and can easier remove bacteria from the body. Usually the bacterial infection are more severe, it can be very detrimental, especially if it is left untreated. These pyramids prevent MRSA, an antibiotic-resistant strain of bacteria common in hospitals, from colonizing coated surfaces well. About a million implanted medical devices are infected each year with MRSA and other bacterial species. Scott VanEpps, a clinical lecturer and research fellow in the U-M Medical School's department of emergency medicine, whose team led the biological study. By clogging up just one of the four grooves, the nanoparticles can shut down the whole enzyme by preventing the twisting action.

They evaluated four species of bacteria on coated and uncoated pegs—two staphylococcal species (including MRSA), one species that causes pneumonia and E. The team suspects that as the MRSA tried to colonize the pegs, the nanopyramids bound to the enzymes that build the cell wall.
The researchers must find out how such a coating would affect human cells near the implant and explore how the nanopyramids affect other enzymes in humans and bacteria. Therapeutic drugs that neutralize NLRP6 could be a possible treatment option, in addition to the use of antibiotics, for fighting bacterial infections.
And have you noticed that there are some infections that heal on its own and there are some that requires antibiotics in order for it to be treated.
Bacteria are single celled microorganisms that multiply through cell division and thrive in different types of environment. They are usually the ones that cause pneumonia, ear, throat, and skin infections, bacterial meningitis and the like.
Most of the signs and symptoms manifested are just the effects of the immune system trying to ramp up the infection.
The new results, published in the journal Nanomedicine, suggest that such a coating could be made from nanoparticles of zinc oxide—a sunscreen and diaper rash cream ingredient that makes the lotion thicker and relatively opaque. Two amino acids, or protein building blocks, sit opposite one another across a groove in the enzyme. National Institutes of Health, National Research Foundation of Korea and Society for Academic Emergency Medicine.
For this reason, it is quite difficult to determine whether you have to consult a physician for a prescription or not. Usually they hide within the cells and when the immune system is weakened, there is a tendency that these viruses can bring an attack causing an infection. Eventually, most viruses do their own thing and leave – thus they are known to cause self-limiting diseases.

The lactose fits into the groove, and the amino acids come together to catalyze the breakup into glucose and galactose.
We started looking for genetic mutations that lead to an increased sensitivity to infections. Most lay people are not equipped with the knowledge on how to discern whether an infection is caused by a bacteria or a virus.
In fact, some bacteria help the body break down nutrients and inhibit the growth of bad organisms.
Our research showed that mice with NLRP6 are less resistant to bacteria and have greater difficulty removing the bacteria from the body. But it is essential to know the difference because one of the major problems about health today is the increasing antibiotic-resistant bacteria due to over prescribing of antibiotics to treat viral infections. This NLRP6 plays a disastrous role in the entire process.” New therapeutic track?The discovery of Mohamed Lamkanfi is not insignificant. The first line treatment for bacterial infections is and will remain antibiotics, of course. However, due to the intensive use of antibiotics in the fight against infections, also the resistance of the bacteria grows against this group of medicines. In spite of the availability of antibiotics bacterial infections continue to pose a serious threat to public health all over the world.
Now that we have exposed the role of the receptor protein NLRP6 in the immune response, we can start thinking about the clinical application thereof for the treatment of bacterial infections.
A vaccine, in my opinion, seems less suitable, but a medicine that neutralizes the receptor protein NLRP6, is a possibility.

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13.12.2014, author: admin

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