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Untitled Document

References

Relief from Bladder Infections - Without Harmful Antibiotics!
D-Mannose - the 100% Natural Alternative!

Bacterial adherence to mucosa is thought to be an initial and important stage to cause urinary tract infection. Among some mechanisms of bacterial adherence, the role of fimbriae and its receptor is worthy of notice. In particular, type 1 fimbriae, for which mannose is assumed as a receptor, is reported as the most common type and called "common fimbriae". Therefore if a certain amount of mannose is present in urine, it will cover the fimbriae of bacteria and competitively block the bacterial adherence to bladder mucosa.

As the first step, we tried to detect mannose in urine by high performance liquid chromatography (HPLC). Sugar can be measured by detecting the fluorescence which is produced by a sugar separated by ion exchange, reacting with arginine at high temperature. The results using standard sugar samples should have highly stable retention time and concentration curve with the minimum detectable mannose concentration of 0.02 microgram. We investigated mannose in urine from 186 cases. Since the mannose peak was often masked by near unidentified peaks, the peak of mannose could be detected only in 80 cases and its concentration could be measured only in 24 cases. Mannose concentration in the urine of the 24 cases was between 2.6 and 108.7 micrograms/ml and in most of cases it was lower than 20 micrograms/ml. Secondary, we examined the possibility of a mannose in urine to prevent bacterial adherence to mucosa by the hemagglutination test using guinea pig erythrocytes and type 1 fimbriated E. coli.(ABSTRACT TRUNCATED AT 250 WORDS)

Zafriri D, Ofek I, Adar R, Pocino M, Sharon N
Department of Human Microbiology,
Sackler Faculty of Medicine, Tel Aviv University, Israel.

Inhibition of bacterial adherence to bladder cells has been assumed to account for the beneficial action ascribed to cranberry juice and cranberry juice cocktail in the prevention of urinary tract infections (A. E. Sobota, J. Urol. 131:1013-1016, 1984). We have examined the effect of the cocktail and juice on the adherence of Escherichia coli expressing surface lectins of defined sugar specificity to yeasts, tissue culture cells, erythrocytes, and mouse peritoneal macrophages. Cranberry juice cocktail inhibited the adherence of urinary isolates expressing type 1 fimbriae (mannose specific) and P fimbriae [specific for alpha-D-Gal(1----4)-beta-D-Gal] but had no effect on a diarrheal isolate expressing a CFA/I adhesin. The cocktail also inhibited yeast agglutination by purified type 1 fimbriae. The inhibitory activity for type 1 fimbriated E. coli was dialyzable and could be ascribed to the fructose present in the cocktail; this sugar was about 1/10 as active as methyl alpha-D-mannoside in inhibiting the adherence of type 1 fimbriated bacteria. The inhibitory activity for the P fimbriated bacteria was nondialyzable and was detected only after preincubation of the bacteria with the cocktail. Cranberry juice, orange juice, and pineapple juice also inhibited adherence of type 1 fimbriated E. coli, most likely because of their fructose content. However, the two latter juices did not inhibit the P fimbriated bacteria. We conclude that cranberry juice contains at least two inhibitors of lectin-mediated adherence of uropathogens to eucaryotic cells. Further studies are required to establish whether these inhibitors play a role in vivo.

PMID: 2653218 Nippon Hinyokika Gakkai Zasshi 1989 Dec;80(12):1816-23
[Anti-bacterial defense mechanism of the urinary bladder.
Role of mannose in urine]. [Article in Japanese]
Toyota S, Fukushi Y, Katoh S, Orikasa S, Suzuki Y

PMID: 2576290, UI: 90172805
[See also Dr. Jonathan Wright's article on mannose and urinary tract infections online http://www.tahoma-clinic.com/mannose.shtml ]
Am J Vet Res 2000 Apr;61(4):446-9
Use of specific sugars to inhibit bacterial adherence to equine endometrium in vitro.
King SS, Young DA, Nequin LG, Carnevale EM

Department of Animal Science,
Food, and Nutrition, College of Agriculture and Science,
Southern Illinois University, Carbondale 62901, USA.

OBJECTIVE: To determine whether specific sugars inhibit adhesion of Streptococcus zooepidemicus, Pseudomonas aeruginosa, and Escherichia coli to equine endometrial epithelial cells in vitro.
SAMPLE POPULATION: Endometrial biopsy specimens collected during estrus from 7 healthy mares.
PROCEDURE: Endometrial specimens on glass slides were incubated for 30 minutes at 4 C with suspensions of S. zooepidemicus, P. aeruginosa, or E. coli in phosphate-buffered saline solution (PBSS) alone or with various concentrations of D-(+)-mannose, N-acetyl-D-glucosamine, N-acetyl-D-galactosamine, D-(+)-glucose, galactose, or N-acetyl-neuraminic acid. Inhibition of bacterial adherence was determined by comparing adhesion of bacteria (i.e., percentage of glandular epithelial cells with adherent bacteria) suspended in each sugar solution with that of bacteria suspended in PBSS.
RESULTS: Mannose and N-acetyl-D-galactosamine inhibited adhesion of E. coli and P. aeruginosa to epithelial cells, whereas only mannose inhibited adhesion of S. zooepidemicus. The other sugars did not affect bacterial adherence.
CONCLUSIONS AND CLINICAL RELEVANCE: Mannose and N-acetyl-D-galactosamine appear to play a role in adhesion of S. zooepidemicus, P. aeruginosa, and E. coli to equine endometrium. In horses with uterine infections, use of sugars to competitively displace bacteria from attachment sites on cells may provide an adjunct to antibiotic treatment. PMID: 10772112

  1. Effect of D-mannose and D-glucose on Escherichia coli bacteriuria in rats, Urol Res 11(2):97-102, 1983.
  2. Mannose-sensitive adherence of Escherichia coli to epithelial cells from women with recurrent urinary tract infections, J Urol 131(5):906-910, May 1984.
  3. Mannose-sensitive hemagglutination in the absence of piliation in Escherichia coli, Mol Microb 4(8):1311-1318, August 1990.
  4. Mannose Sensitive Adherence of Escherichia coli to Epithelial Cells. Eighty-First Annual Meeting of the American Society for Microbiology. Dallas, Texas. March 2-4, 1981.
  5. Effect of D-Mannose on Escherichia coli Adherence to Human Vaginal Epithelial Cells and Hemagglutination. American Urological Association. Seventy-Sixth Annual Meeting. Boston, Massachusetts. May 11, 1981
  6. Prevention of Escherichia coli Bacteriuria in Rats by D-Mannose. American Urological Association. Boston, Massachusetts. May 11, 1981.
    Regulation of Mannose-Sensitive Hemagglutination in Clinical Isolates of Escherichia coli. In Kass EH, Svanborg-Eden C, eds:
  7. Host-Parasite Interactions in Urinary Tract Infections 115-121, Chicago, Illinois, 1989. The University of Chicago Press.
  8. Contribution of Escherichia coli Type l Pili to Ascending Urinary Tract Colonization in Mice. eds: Host-Parasite Interactions in Urinary Tract Infections 341-347, Chicago, Illinois, 1989. The University of Chicago Press.
    Inhibitory activity of cranberry juice on adherence of type 1 and type P fimbriated Escherichia coli to eucaryotic cells.

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