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Tarmmikrobiomets roller i UTI-modtagelige kvinder

29. september 2026 opdateret af: University of Florida

Undersøg tarmmikrobiomets roller i de forskellige reaktioner fra UTI-modtagelige kvinder på tranebærjuiceindtag

Clinical trials on cranberry juice and UTI prevention yielded both positive and negative results for unknown reason. Gut microbiome in women affect the absorption and metabolism of cranberry bioactives. The variation of gut microbiome is a probable mechanism for metabolic polymorphisms and disparity in UTI prevention in women.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

The American cranberries, especially cranberry juice, have used for centuries as a folk medicine to prevent urinary tract infections (UTI), which affect 50% of women in their lifetime. Over 40 clinical trials have been conducted in the last 20 years to verify the UTI preventatively activity of cranberry juices, but the results were contradictory. About 90% of UTI are initiated by the adhesion of uropathogenic E. coli (UPEC) on urinary tract epithelia. It was reported that human urine after consumption of cranberry juice inhibited the adhesion of UPEC. The A-type proanthocyanidins and xyloglucans are the presumed bioactives in cranberries, however, this is unlikely because these two classes of compounds have extremely low bioavailability in human body. Preliminary research suggested that women can be either "resistant" or "susceptible" to UTI depending on the inherent anti-adhesion activity in their urine against UPEC before consuming cranberry juice. Not all but a fraction of "UTI susceptible" women had increased urinary anti-adhesion activity after consuming cranberry juices. These women are classified as "responders" and others are "non-responders". The variation of gut microbiome is a probable mechanism for metabolic polymorphisms and disparity in UTI prevention. The objective of this trials is to identify gut microbes and anti-adhesive urinary biomarkers which significantly contribute to the anti-adhesion of UPEC.

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

152

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

    • Florida
      • Gainesville, Florida, Forenede Stater, 32611
        • University of Florida

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

21 år til 65 år (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ja

Køn, der er berettiget til at studere

Kvinde

Beskrivelse

Inclusion Criteria:

  • Healthy women participants;
  • BMI 18.5-29.9 kg/m2;
  • At least 110 pounds in weight

Exclusion Criteria:

  • BMI≥ 30 kg/m2;
  • Pregnancy and breast-feeding;
  • Smoking, frequent alcohol use;
  • History of any clinically important disorder that may interfere with interpretation of the results;
  • Intake of medication that might influence the outcome of the study

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Tildeling: Randomiseret
  • Interventionel model: Crossover opgave
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Cranberry juice consumption

Participants deemed as responders and non-responders will be given 20-30 oz (590-885 mL) of cranberry juice daily for 3 weeks.

The responders and non-responders will drink 20-30 oz of (590-885 mL) 27% cranberry juice daily for 3 weeks.

Eksperimentel: Apple juice consumption

Participants deemed as responders and non-responders will be given 20-30 oz (590-885 mL) apple juice with matching sugar and calories daily for 3 weeks.

The participants will drink apple juice with matching sugar content and calories for 3 weeks

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Change in the unrinary anti-adhesion activity of UTI susceptible women
Tidsramme: Baseline up to 21 days of each intervention

Compare the statistical differences between the changes from baseline in the an-adhesion activity against uropathogenic E. coli in UTI-susceptible women after consuming the cranberry juice for 3 weeks versus after consuming the placebo juice for 3 weeks. Anti-adhesion activity in urine will be measured using a fluorescence-based microplate method. The anti-adhesion activities of urines will be expressed by its equivalence to myricetin level. The unit for urine anti-adhesion activities is µg myricetin/mg creatinine.

Baseline up to 21 days of each intervention

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Determine the compositional differences of gut microbiome in responders and non-responders after the cranberry juice intake
Tidsramme: Baseline up to 21 days of each intervention

Compare the differences in the gut microbiomes between responders and non-responders after consuming the cranberry juice for 3 weeks versus after consuming the placebo juice for 3 weeks. Human feces collected from responders and non-responders will be analyzed for microbiota composition. Relative abundance of gut microbiome at phylum level, family level, genus level, and Firmicutes over Bacteroidetes ratio will be evaluated. Genomic microbial DNA will be extracted from fecal samples using DNA isolation kits. The 16S ribosomal RNA gene (V1-3 region) of each sample will be amplified and sequenced using a barcoding system on a MiSeq sequencer. Sequence data will be analyzed using the latest version of QIIME.

Baseline up to 21 days of each intervention
Identify anti-adhesion urinary biomarkers in responders versus non-responders after the cranberry juice intake
Tidsramme: Baseline upt to 21 days of each intervention

Determine the impacts of cranberry juice intake on the urinary metabolome and identify anti-adhesion urinary biomarkers in responders and non-responders after consuming the cranberry juice for 3 weeks versus after consuming the placebo juice for 3 weeks. Metabolites in urine will be detected using UHPLC-HRMS and annotated using combination of m/z and retention time. Metabolites that significantly contribute to the anti-adhesion activity of urine revealed by PLS regression analysis are the potential anti-adhesion biomarkers. A list of potential biomarkers will be generated. Structures of these biomarkers will be tentatively determined through spectral analysis and database searching. Structure of tentatively identified biomarkers will be confirmed by comparing with authentic standards.

Baseline upt to 21 days of each intervention

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Samarbejdspartnere

Efterforskere

  • Studieleder: Gary P Wang, PhD, University of Florida
  • Ledende efterforsker: Liwei Gu, PhD, University of Florida

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Faktiske)

18. oktober 2021

Primær færdiggørelse (Faktiske)

30. september 2026

Studieafslutning (Faktiske)

30. september 2026

Datoer for studieregistrering

Først indsendt

29. september 2021

Først indsendt, der opfyldte QC-kriterier

29. september 2021

Først opslået (Faktiske)

1. oktober 2021

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

30. september 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

29. september 2026

Sidst verificeret

1. september 2026

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Andre undersøgelses-id-numre

  • 2021-09003
  • IRB202102165 (Anden identifikator: UF IRB-01)
  • PRO00039868 (Anden identifikator: UF UFIRST)

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ingen

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

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