Breaking News
September 26, 2018 - New insights into what drives organ transplant rejection
September 26, 2018 - Tiny Device Is a ‘Huge Advance’ for Treatment of Severe Heart Failure
September 26, 2018 - Research shows possibility to postpone cumbersome treatment for low-risk MDS patients
September 26, 2018 - CSU chemists may help in making extracorporeal life support devices more effective
September 26, 2018 - Blood-brain barrier can be important biomarker for early diagnosis of Alzheimer’s disease
September 26, 2018 - PCORI, AHRQ announce awards to support patient-centered outcomes research in learning health systems
September 26, 2018 - Scientists discover and characterize human skeletal stem cells
September 26, 2018 - Repeat CT Common in Peds Traumatic Epidural Hematoma
September 26, 2018 - Genetics Home Reference: bunion
September 26, 2018 - Increase observed in hearts from drug-intoxicated donors
September 26, 2018 - For Heart Failure Patients, Mitral Valve Procedure Improved Outcomes
September 26, 2018 - TINY cancer detection device shows promise as point-of-care detector of KSHV
September 26, 2018 - Women with non-small cell lung cancers live longer than their male counterparts
September 26, 2018 - KTU researchers engineer experimental bone to help treat osteoarthritis patients
September 26, 2018 - Foundation for a Smoke-Free World calls for proposals to implement Smoke-Free Index
September 26, 2018 - Functional Imagery Training helps lose five times more weight than talking therapy
September 26, 2018 - Fewer American Teens Having Sex, Most Using Birth Control
September 26, 2018 - We are predisposed to forgive, new research suggests
September 26, 2018 - Insomnia Exacts Heavy Toll on Quality of Life
September 26, 2018 - Clinical study shows efficacy, safety of novel drug-eluting stent with improved radiographic visibility
September 26, 2018 - Cytox, AIBL announce expanded agreement to assess genetic risk for Alzheimer’s
September 26, 2018 - Study finds persistent rate of lawnmower injury-related emergency department visits
September 26, 2018 - Researchers find molecule that halts, reverts neurodegeneration caused by Parkinson’s disease
September 26, 2018 - Novartis announces winners of 2018 eXcellence in Ophthalmology Vision Award
September 26, 2018 - New spinout company to tackle drug-resistant infections with novel antibiotics
September 26, 2018 - In depression the brain region for stress control is larger
September 26, 2018 - Smuggling RNA into cells can activate the immune system to fight cancer
September 26, 2018 - Special Focus Issue takes wide view of complementary and integrative medicine in cancer
September 26, 2018 - Researchers now confirm that genome duplication drives evolution of species
September 25, 2018 - Study provides evidence of beta lactamase producing, antimicrobial resistant E. coli in U.S. retail meat
September 25, 2018 - UCI study finds new cause of cerebral microbleeds
September 25, 2018 - Researchers propose mechanism by which ASTN2 protein defects lead to brain disorders
September 25, 2018 - Chinese and German researchers to cooperate more closely in future for better food
September 25, 2018 - Recent study helps predict probability of pregnant mothers to have child with autism
September 25, 2018 - New online, sound matching tool offers tinnitus sufferers potential treatment options
September 25, 2018 - UC Davis researchers take critical step in developing more effective Salmonella vaccine
September 25, 2018 - Antibiotics best paediatric treatment for children’s chronic wet cough
September 25, 2018 - Looking beyond opioids: Stanford pain psychologist briefs Congress
September 25, 2018 - Organs actively fighting back against autoimmune diseases, finds study
September 25, 2018 - Lancaster professor aims to understand how genes affect smoking cessation
September 25, 2018 - Human-oriented perspective needed to better understand Parkinson’s disease
September 25, 2018 - Physical activity may have beneficial effects for people with rare Alzheimer’s disease
September 25, 2018 - FDA Updates on Valsartan Recalls
September 25, 2018 - 3-D-printed tracheal splints used in groundbreaking pediatric surgery
September 25, 2018 - Who is the designated driver, or proxy, for your health decisions?
September 25, 2018 - New chemo-optogenetic method enables multi-directional activity control of cellular processes
September 25, 2018 - Study explores link between genetic predisposition to Alzheimer’s and cardiometabolic risk factors
September 25, 2018 - NeoTract presents new clinical data from studies of UroLift System for patients with BPH
September 25, 2018 - Patients with paralysis manage to walk thanks to new technology
September 25, 2018 - Statins Improve Long-Term Survival After AAA Repair
September 25, 2018 - Novel brain network linked to chronic pain in Parkinson’s disease
September 25, 2018 - Researchers reassess negative pressure wound therapy as its benefit and harm remain unclear
September 25, 2018 - Older adults with ‘fall plan of care’ less likely to suffer fall-related hospitalizations
September 25, 2018 - FDA lifts partial clinical hold that paused enrollment of new patients in tazemetosta clinical trials
September 25, 2018 - IME Medical Electrospinning establishes state-of-the-art manufacturing lab facilities
September 25, 2018 - Phase 1 and 2 clinical trials of entrectinib drug in ROS1-positive NSCLC show promising results
September 25, 2018 - How to Protect Your Eyesight
September 25, 2018 - Novel approach allows researchers to define how cells in the retina respond to diabetes
September 25, 2018 - Columbia University announces winners of 2018 Louisa Gross Horwitz Prize
September 25, 2018 - New model enables anyone to run powerful simulations, complex calculations easily
September 25, 2018 - Clinical trial investigators found non-compliant with requirement to report results on EU register
September 25, 2018 - Study analyzes quality of protein supplements in function of source, treatment and storage
September 25, 2018 - FDA grants Orphan Drug Designation to Myelo001 for treatment of Acute Radiation Syndrome
September 25, 2018 - U.S. Alzheimer’s Cases to Nearly Triple by 2060
September 25, 2018 - Improving cell replacement therapy for Parkinson’s disease
September 25, 2018 - Genervon reports new findings that drug candidate GM6 attenuates Alzheimer’s disease in mice model
September 25, 2018 - FDA approves new 5 mm diameter drug-eluting stent from Cook Medical
September 25, 2018 - New $17.8 million grant ensures USC at forefront of research on tobacco-related health risks
September 25, 2018 - Researchers analyze response to combination immunotherapy for patients with rare skin cancer
September 25, 2018 - Study sheds light on how brain protein may be involved neurodevelopmental disorders
September 25, 2018 - Where to draw the line on incentives
September 25, 2018 - Solid fuel use linked with increased risk of hospitalization or death from respiratory diseases
September 25, 2018 - ‘Trouble Brewing’ report highlights steps that governments can take to reduce alcohol-related harms
September 25, 2018 - Recurrence risk of VTE appears similar for patients with cancer and those with unprovoked VTE
September 25, 2018 - Global leaders must make bold commitments at first-ever UN tuberculosis summit
September 25, 2018 - Brief sleep intervention works long-term to prevent child obesity
September 25, 2018 - Vaping among kids and teens a growing concern
September 25, 2018 - Public launch of products and application solutions from Porvair Laboratory Division
September 25, 2018 - Harmful H. pylori may play a role in Parkinson’s disease
September 25, 2018 - Researchers develop way to measure different types of fear of falling in patients with Parkinson’s
Researchers propose different approach to beat antibiotic-resistant superbugs

Researchers propose different approach to beat antibiotic-resistant superbugs

image_pdfDownload PDFimage_print

Got a sore throat? The doctor may write a quick prescription for penicillin or amoxicillin, and with the stroke of a pen help diminish public health and your own future health by helping bacteria evolve resistance to antibiotics.

It’s time to develop alternatives to antibiotics for small infections, according to a new thought paper by scientists at the Georgia Institute of Technology, and to do so quickly. It has been widely reported that bacteria will evolve to render antibiotics mostly ineffective by mid-century, and current strategies to make up for the projected shortfalls haven’t worked.

One possible problem is that drug development strategies have focused on replacing antibiotics in extreme infections, such as sepsis, where every minute without an effective drug increases the risk of death. But the evolutionary process that brings forth antibiotic resistance doesn’t happen nearly as often in those big infections as it does in the multitude of small ones like sinusitis, tonsillitis, bronchitis, and bladder infections, the Georgia Tech researchers said.

“Antibiotic prescriptions against those smaller ailments account for about 90 percent of antibiotic use, and so are likely to be the major driver of resistance evolution,” said Sam Brown, an associate professor in Georgia Tech’s School of Biological Sciences. Bacteria that survive these many small battles against antibiotics grow in strength and numbers to become formidable armies in big infections, like those that strike after surgery.

“It might make more sense to give antibiotics less often and preserve their effectiveness for when they’re really needed. And develop alternate treatments for the small infections,” Brown said.

Brown, who specializes in the evolution of microbes and in bacterial virulence, and first author Kristofer Wollein Waldetoft, a medical doctor and postdoctoral research assistant in Brown’s lab, published an essay detailing their suggestion for refocusing the development of bacteria-fighting drugs on December 28, 2017, in the journal PLOS Biology.

Duplicitous antibiotics

The evolution of antibiotic resistance can be downright two-faced.

“If you or your kid go to the doctor with an upper respiratory infection, you often get amoxicillin, which is a relatively broad-spectrum antibiotic,” Brown said. “So, it kills not only strep but also a lot of other bacteria, including in places like the digestive tract, and that has quite broad impacts.”

E. coli is widespread in the human gut, and some strains secrete enzymes that thwart antibiotics, while other strains don’t. A broad-spectrum antibiotic can kill off more of the vulnerable, less dangerous bacteria, leaving the more dangerous and robust bacteria to propagate.

“You take an antibiotic to go after that thing in your throat, and you end up with gut bacteria that are super-resistant,” Brown said. “Then later, if you have to have surgery, you have a problem. Or you give that resistant E. coli to an elderly relative.”

Much too often, superbugs have made their way into hospitals in someone’s intestines, where they had evolved high resistance through years of occasional treatment with antibiotics for small infections. Then those bacteria have infected patients with weak immune systems.

Furious infections have ensued, essentially invulnerable to antibiotics, followed by sepsis and death.

Alternatives get an “F”

Drug developers facing dwindling antibiotic effectiveness against evolved bacteria have looked for multiple alternate treatments. The focus has often been to find some new class of drug that works as well as or better than antibiotics, but so far, nothing has, Brown said.

Wollein Waldetoft came across a research paper in the medical journal Lancet Infectious Diseases that examined study after study on such alternate treatments against big, deadly infections.

“It was a kind of scorecard, and it was almost uniformly negative,” Brown said. “These alternate therapies, such as phage or anti-virulence drugs or, bacteriocins — you name it — just didn’t rise to the same bar of efficacy that existing antibiotics did.”

“It was a type of doom and gloom paper that said once the antibiotics are gone, we’re in trouble,” Brown said. “Drug companies still are investing in alternate drug research, because it has gotten very, very hard to develop new effective antibiotics. We don’t have a lot of other options.”

But the focus on new treatments for extreme infections has bothered the researchers because the main arena where the vast portion of resistance evolution occurs is in small infections. “We felt like there was a disconnect going on here,” Brown said.

Don’t kill strep, beat it

The researchers proposed a different approach: “Take the easier tasks, like sore throats, off of antibiotics and reserve antibiotics for these really serious conditions.”

Developing non-antibiotic therapies for strep throat, bladder infections, and bronchitis could prove easier, thus encouraging pharmaceutical investment and research.

For example, one particular kind of strep bacteria, group A streptococci, is responsible for the vast majority of bacterial upper respiratory infections. People often carry it without it breaking out.

Strep bacteria secrete compounds that promote inflammation and bacterial spread. If an anti-virulence drug could fight the secretions, the drug could knock back the strep into being present but not sickening.

Brown cautioned that strep infection can lead to rheumatic heart disease, a deadly condition that is very rare in the industrialized world, but it still takes a toll in other parts of the world. “A less powerful drug can be good enough if you don’t have serious strep throat issues in your medical history,” he said.

Sometimes, all it takes is some push-back against virulent bacteria until the body’s immune system can take care of it. Developing a spray-on treatment with bacteriophages, viruses that attack bacteria, might possibly do the trick.

If doctors had enough alternatives to antibiotics for the multitude of small infections they treat, they could help preserve antibiotic effectiveness longer for the far less common but much more deadly infections, for which they’re most needed.

Source:

http://www.rh.gatech.edu/news/600252/want-beat-antibiotic-resistant-superbugs-rethink-strep-throat-remedies

Tagged with:

About author

Related Articles