Assessment of antimicrobial microspheres as a prospective novel treatment targeted towards the repair of perianal fistulae.

Abstract:

BACKGROUND:None of the proposed materials tested for the management of perianal fistulae has proven to be a definitive treatment. AIM:To assess a new repair scaffold and drug delivery device conceived to target perianal fistula repair. METHODS:Poly(D,L-lactide-co-glycolide) porous microspheres containing either antibacterial silver-releasing degradable phosphate glass or metronidazole were prepared using thermally induced phase separation. RESULTS:Ion- and drug-release profiling of the microspheres revealed continued release of silver ions from microspheres filled with silver-doped phosphate glass and high encapsulation efficiency for metronidazole [78% and 82% for microspheres loaded with 2.5% and 1.3% (w/w), respectively]. Microbicidal activity was confirmed by growth inhibition of bacterial species (Staphylococcus aureus, Escherichia coli and Bacteroides fragilis), which characteristically dominate the colonization of perianal fistula tracts. Microspheres containing >3 mol% silver or metronidazole resulted in strong bacterial inhibition/kill against B. fragilis; the presence of one sphere containing >3 mol% silver had a potent inhibitory effect against all the microbes studied. Microspheres became rapidly integrated with host tissue following subcutaneous implantation into a rodent wound model. CONCLUSION:The study demonstrates a novel scaffold for guided tissue regeneration providing local release of antimicrobial agents sufficient to counter bacterial colonization and warrants further investigation.

journal_name

Aliment Pharmacol Ther

authors

Blaker JJ,Pratten J,Ready D,Knowles JC,Forbes A,Day RM

doi

10.1111/j.1365-2036.2008.03773.x

subject

Has Abstract

pub_date

2008-09-01 00:00:00

pages

614-22

issue

5

eissn

0269-2813

issn

1365-2036

pii

APT3773

journal_volume

28

pub_type

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    pub_type: 杂志文章

    doi:10.1111/apt.12098

    authors: Cabrera R,Limaye AR,Horne P,Mills R,Soldevila-Pico C,Clark V,Morelli G,Firpi R,Nelson DR

    更新日期:2013-01-01 00:00:00

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    pub_type: 杂志文章,meta分析,评审

    doi:10.1111/apt.12973

    authors: Elfström P,Sundström J,Ludvigsson JF

    更新日期:2014-11-01 00:00:00

  • Microbiome changes associated with sustained eradication of Clostridium difficile after single faecal microbiota transplantation in children with and without inflammatory bowel disease.

    abstract:BACKGROUND:Little data are available regarding the effectiveness and associated microbiome changes of faecal microbiota transplantation (FMT) for Clostridium difficile infection (CDI) in children, especially in those with inflammatory bowel disease (IBD) with presumed underlying dysbiosis. AIM:To investigate C. diffic...

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    pub_type: 杂志文章

    doi:10.1111/apt.13326

    authors: Hourigan SK,Chen LA,Grigoryan Z,Laroche G,Weidner M,Sears CL,Oliva-Hemker M

    更新日期:2015-09-01 00:00:00