Immune System Overreaction May Enable Recurrent Urinary Tract Infections
The immune system may open the door to recurrent urinary tract infections (UTIs) by overdoing its response to an initial infection, researchers at Washington University School of Medicine in St. Louis have found.
Researchers showed in mice that severe inflammatory responses to an initial UTI cause bladder damage and allow infection to persist longer. After one to two weeks of infection, the bladder wall undergoes additional changes that leave mice more vulnerable to later infection. Suppressing the immune system during initial infection decreases these vulnerabilities, they report Aug. 12 in PLoS Pathogens.
“We found markers in the mice that may one day help us identify patients vulnerable to recurrent infection and refine our treatment strategies,” says lead author Thomas J. Hannan, DVM, PhD. “There were infection-fighting elements in the immune responses of some mice that we may, for example, one day be able to trigger with vaccines for vulnerable patients.”
The research was conducted at the Center for Women’s Infectious Disease Research at the School of Medicine.
UTIs affect millions of people each year. Although antibiotics are the primary treatment, antibiotic resistance is a growing concern, according to Scott Hultgren, PhD, the center’s director. Symptoms include frequent, painful urination, blood or cloudiness in the urine and fatigue.
“Women and infants are at greatest risk for UTIs, and chronic and recurrent infections are common,” says Hultgren, the Helen L. Stoever Professor of Molecular Microbiology. “The diagnosis and treatment of UTIs in the United States is estimated to cost $1.6 billion annually.”
Hultgren’s lab has shown that bacteria can cause multiple bouts of UTI symptoms by going into a dormant state in the host and reactivating months later.
In the study, researchers infected mice with UTIs for a month. Some mice spontaneously resolved their infections; others developed a persistent infection that Hultgren’s group calls chronic bacterial cystitis. These mice persistently had high levels of bacteria in their urine and bladder and high levels of inflammation in the urinary tract.
“Chronic bacterial cystitis is an infection that is actively reproducing, has established a persistent and significant foothold in the host’s bladder and has prompted a sustained response from the immune system,” says Hannan, a research instructor in pathology and immunology. “Despite all this, the infection is still well-tolerated by the mice.”
In one experiment, mice were treated with antibiotics after four weeks of UTI to eliminate the bacteria. Researchers then exposed mice to other UTI-causing bacteria that they could distinguish from the initial infectious bacteria to see how the mice would respond to a subsequent infection.
Forty percent of mice that had signs of chronic bacterial cystitis in the initial challenge developed it again. Mice who never progressed to chronic cystitis or defeated the infection on their own did not develop chronic bacterial cystitis in the second challenge.
Symptoms were more severe in mice with recurrent chronic infections than in recurrent infections that were rapidly cleared.
In mice more vulnerable to recurrent chronic infection, inflammatory immune cells had infiltrated bladder tissues. Inflammatory cells were still visible up to a month after infections were treated and cleared.
“We repeated the experiment, shortening the initial infection time to 14 days and then to one day,” Hannan says. “Two weeks of initial infection produced a similar effect, but one day of infection, which is not long enough to progress to chronic bacterial cystitis, did not.”
Mice that had chronic bacterial cystitis in the first round of infection but avoided it in the second had little or no bacteria in their urine during the second test. Hannan says this suggests that they may have antibodies in their urine directed against UTI-causing bacteria. Hultgren and colleagues are currently testing vaccines designed to provoke a similar mouse immune response.
Investigators in Hultgren’s laboratory are also collaborating with researchers at the University of Washington and Duke University to see if the mouse results can lead them to markers of vulnerability to recurrent infection in humans.
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This article is about a group of researchers at Washington University School of Medicine in St. Louis that may have found a reason for recurrent urinary trac infections (UTIs). they believe that they are cause by your immune system overdooing its initial response to the initial infection and these sever inflamitory responses can cause bladder damage and make the infection persist. making the imune system lessen its initial response can make you less suseptable to infection. these infections affect millions of people each year especially women and children and these studies can greatly reduce the risk of this infection.
Summary- Researchers at Washington University School of Medicine in St. Louis have found immune system may open the door to recurrent UTI’s by overdoing its response to an initial infection. The found this out by studying mice they found the immune system caused bladder damage and allow infection to persist longer. This information was tested at Center for Women’s Infectious Disease Research at the School of Medicine. The diagnosis and treatment of UTIs in the United States is estimated to cost $1.6 billion annually!!!
The immune system may open the door to recurrent urinary tract infections (UTIs) by overdoing its response to an initial infection, researchers at Washington University School of Medicine in St. Louis have found. Researchers showed in mice that severe inflammatory responses to an initial UTI cause bladder damage and allow infection to persist longer. After one to two weeks of infection, the bladder wall undergoes additional changes that leave mice more vulnerable to later infection. Symptoms include frequent, painful urination, blood in the urine and fatigue. In the study, researchers infected mice with UTIs for a month. Some mice spontaneously resolved their infections; others developed a persistent infection that Hultgren’s group calls chronic bacterial cystitis.
This artical is talking about finding a vaccine to help heal urinary tract infections.
This artical is about how if your immune system is down that it may cause u to get recurring urinary tract infections. Scientist are trying to find a vaccine that will help prevent UTI’s so they are testing different medicines on mice to see how they react. After one to two weeks of infection, the bladder wall undergoes additional changes that leave mice more vulnerable to later infection. Same with people thay say. they say that babies and women are the ones to most likely get UTI’s. I’m glad that they are trying to do something to help people that have reccuring UTI’s. I hope they come up with something really soon so they the people that do can get relief soon.
Researchers at Washington University School of Medicine in St. Louis are researching why people get recurrent urinary tract infections (UTIs). In their research with mice, they found that the body’s response causes bladder damage and the infection to return or stay longer. So, they report that if the immune response is restrained at the beginning of the infection, recovery would be much better. The way to treat UTIs maybe different for people who have recurrent UTIs. UTIs are treated by antibiotics and there’s concern about antibiotic resistance for those with recurrent UTIs.
The immune system may make the bordy become more susceptible to a UTI. this is done by it overreacting in its initial response to the infection. thus leaving it more vulnerable to later infection. Researchers at Washington University School of Medicine in St. Louis discovered this when they tested on mice. the mice showed inflammatory responses to an initial UTI causing bladder damage and allowing infection to persist longer
In St. Louis recearchers from Washington University school of Medicine have fount that your immune system creates an open door for UTIs. It does this by over responding to the infection. When studing mice they found that the body ’s over reaction damages the bladder causing the infection to stay longer. UTIs can be treated by using a spefic antiboitic.
This article is about how immune system overreaction may enable reacurrent unrinary tract infections. Researchers at the Washington University school of medicine in St. Louis are researching how the immune system may open the door to recurrent urinary tract infections by overdoing its response to an initial infection. Hultgren, the Helen L. Stoever Professor of Molecular Microbiology, states that women and infants are at greatest risk for urinary tract infections.
In this study, researchers infected mice with UTIs for a month. Researchers showed in mice that severe inflammatory responses to an initial urinary tract infection caused bladder damage and allowed the infection to persist even longer.
The immune system may open the door to recurrent UTIs by overdoing its response to an initial infection. Researchers showed in mice that severe inflammatory responses to an initial UTI cause bladder damage and allow infection to persist longer. After one to two weeks of infection, the bladder wall undergoes additional changes that leave mice more vulnerable to later infection. Symptoms include frequent, painful urination, blood in the urine and fatigue. In the study, researchers infected mice with UTIs for a month. Some mice spontaneously resolved their infections; others developed a persistent infection that Hultgren’s group calls chronic bacterial cystitis.
your immune system will cause re occurring infections by working to hard to fight off an irritation. bladder damage can occur, therefore causing the infection to last longer. strengthening your immune system will limit your chances of worse infection. women and babies are at most risk of a UTI. if they keep studying they will come up with a cure. these studies could also lead to the cure of relatable infections.
this article is about a vaccine that could help prevent utis. if you overdose the response the the utis then i could prevent it. people would get a immunity to the antibiotics after a while and they wouldn’t be affected so this may be the best method yet. women and babies are the most vulnerable to utis. in the tests this method was more effective.
The immune system may open the door to recurrent urinary tract infections by overdoing its response to an initial infection. Researchers showed in mice that severe inflammatory responses to an initial urinary tract infections cause bladder damage and allow infection to persist longer. After one to two weeks of infection, the bladder wall undergoes additional changes that leave mice more vulnerable to later infection. They say women and babies are most likely to get urinary tract infections. In one experiment, mice were treated with antibiotics after four weeks of UTI to eliminate the bacteria. Then the researches exposed mice to other UTI-causing bacteria so that they could distinguish them from the initial infectious bacteria, to see how the mice would respond to a subsequent infection.
The immune system may open the door to recurrent urinary tract infections (UTIs) by overdoing its response to an initial infection. Researchers at Washington University School of Medicine in St. Louis discovered this when they tested on mice. The mice showed inflammatory responses to an initial UTI causing bladder damage and allowing infection to persist longer. Symptoms were more severe in mice with recurrent chronic infections than in recurrent infections that were rapidly cleared.