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Increased renal scarring by bacteria with mannose-sensitive pili
T Matsumoto1, Y Mizunoe, N Sakamoto
1Department of Urology, Faculty of Medicine, Kyushu University, Fukuoka, Japan.
Urological Research
|January 1, 1990
Summary
Bacterial pili play a role in chronic pyelonephritis. Mannose-sensitive pili on Serratia marcescens strains significantly increased renal scarring in a rat model, unlike mannose-resistant pili.
Area of Science:
- Microbiology
- Nephrology
- Pathogenesis
Background:
- Renal scars are a consequence of chronic pyelonephritis.
- Chronic pyelonephritis can lead to renal insufficiency and hypertension.
- Bacterial virulence factors are implicated in kidney damage.
Purpose of the Study:
- To investigate the role of bacterial pili in renal scar formation.
- To compare the effects of mannose-resistant (MR) and mannose-sensitive (MS) pili from Serratia marcescens in a chronic pyelonephritis model.
Main Methods:
- Utilized recombinant DNA techniques to construct bacterial strains with specific pili.
- Infected a rat model with MR-piliated, MS-piliated, or non-piliated Serratia marcescens.
- Assessed renal scarring as an outcome of infection.
Main Results:
- MS-piliated bacteria induced more severe renal scarring compared to non-piliated strains.
- MR-piliated bacteria did not cause significantly more scarring than non-piliated bacteria.
- Pili type is a critical factor in bacterial-induced renal scarring.
Conclusions:
- Mannose-sensitive pili are a significant virulence factor in the development of renal scars.
- Targeting MS pili could be a strategy to prevent kidney damage in chronic pyelonephritis.
- Understanding pili function is crucial for managing kidney infections.