Vaginal mikrobiomtransplantation for tilbagevendende bakteriel vaginose
Vaginal mikrobiomtransplantation for tilbagevendende bakteriel vaginose-A placebo, randomiseret, kontrolleret forsøg
Vaginal Microbiome Transplantation (VMT) may be beneficial in treating the most severe cases of recurrent and antibiotics-nonresponsive cases of BV.
We completed a preliminary study in which we treated patients with recurrent and antibiotics-non-responsive, intractable BV, with VMT from healthy donors [Lev-Sagie, Nature Medicine 2019]. Four VMT recipients in this preliminary study featured a significant improvement of both clinical symptoms and dysbiotic vaginal microbiome composition and function, which persisted over a long follow-up period, while one recipient featured a partial remission.
The proposed study is designed as a placebo, randomized controlled trial, and is aimed to further assess whether VMT may serve as a viable option in symptomatic, intractable BV. In the suggested study, we compare transplantation of: 1) vaginal fluid from healthy donors (VMT), and 2) saline and glycerol (placebo).
Studieoversigt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Detaljeret beskrivelse
Women diagnosed with symptomatic, recurrent BV, will be recruited. After assessment of inclusion and exclusion criteria and patient's consent to participate, patients will be assigned to receive transplantation of either VMT or a placebo. Patients will be blinded to the therapy given.
Following VMT, patients will be examined every 2 weeks for the first month, and then once every month, for additional 11 months after VMT. In case of BV recurrence, repeated transplantations will be done after antibiotics. Repeated VMTs can be done to a maximum of 6 sessions, before the procedure will be considered a failure.
Placebo recipients will be examined every 2 weeks for the first month, and then once every month for additional 3 months after placebo (total of 4 months). Patients may have up to 3 repeated placebo transplantations during the 4 months. At the 4 months post placebo timepoint, in case they are still symptomatic and fulfill inclusion criteria, patients who initially received placebo will be unblinded and offered a VMT. After VMT, they will be further followed for additional 12 months (every two weeks for the first month and then once a month for additional 11 months).
In each frontal appointment:
- Patients will be questioned regarding symptoms (discharge and odor) , adverse events (related and not related to the study), and compliance with the protocol.
- Will undergo examination which will include vaginal inspection, pH measurement, whiff test and microscopy.
- Samples will be taken.
During the follow-up phase, women who are clinically stable and asymptomatic will be given the option to collect a monthly vaginal sample at home, store it in their home freezer, and bring the collected samples to the clinic at three-month intervals when they arrive to their examination visit. These women will be contacted monthly and will be asked about their symptoms. If they report any change in their condition or recurrence of symptoms, they will be asked to attend the clinic for an examination.
In order to prevent transfer of pathogens, sperm, or antibiotic-resistant commensals we will establish a "vaginal fluid bank" in which samples from suitable donors will be kept for future use:
- Donors will be screened using a questionnaire addressing risk factors for potentially transmissible infections, undergo screening for cervico-vaginal infections, cervical cytology screening, and serology analysis for transmittable infections.
- The collected samples for VMT will be examined for bacteria,viruses and sperm.
- Each sample will be sequenced to verify its composition (L. crisptus dominance).
- Three months after collection of a sample, donors will undergo repeated serologic screening, to verify for the absence of sero-conversion prior to VMT.
In addition to the main cohort, we will conduct additional observational study;To assess the antimicrobial effects of lactobacilli on pathogenic bacteria, we will use 100 fresh samples from patients with BV or healthy controls. 100ul of These samples will be cultured to evaluate the influence of three antimicrobial molecules secreted by lactobacilli on both pathogenic bacteria and beneficial Lactobacilli in the vaginal microbiome. As a control, we will use lactic acid or boric acid. Samples will be analysed for the microbiome composition before culturting, after over-night culturing and after treatment with the antimicrobial molecules.
Undersøgelsestype
Undersøgelsestype
Tilmelding (Faktiske)
Tilmelding
Fase
Fase
- Fase 2
- Fase 1
Kontakter og lokationer
Studiesteder
-
-
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Jerusalem, Israel, 9765422
- Hadassah Medical Center
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Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Beskrivelse
Inclusion Criteria:
- Ages 18-50
- Recurrent BV, defined as ≥4 symptomatic episodes of BV during the last year, who require maintenance antibiotic treatment (twice weekly) in order to remain symptom-free, or if they experienced recurrence of BV in ≤ 2 months following antibiotic treatment, with a documented history of recurrent BV in the last year.
- Patients are otherwise healthy.
- Contraception use
Exclusion Criteria:
- Pregnancy or a planned pregnancy in the upcoming year
- Infection with HIV.
- Immunodeficiency status.
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Behandling
- Tildeling: Randomiseret
- Interventionel model: Parallel tildeling
- Maskning: Enkelt
Antal våben
Våben og indgreb
Deltagergruppe / ArmDeltagergruppe / Arm |
Intervention / BehandlingIntervention / Behandling |
|---|---|
|
Eksperimentel: VMT recipients
vaginal microbiome transplant from healthy donors Before transplantation, patients will be treated with intravaginal antibiotics. A frozen specimen will be thawed at room temperature and will be placed in the patient's vagina. Following VMT, patients will be evaluated every 14 days for the first month, then every month for additional 11 months. |
Healthy donors vaginal fluid is introduced into recipients' vagina to replace their indigenous disease-associated microbiome |
|
Placebo komparator: Placebo
Saline with glycerol will be used as placebo. Before transplantation, patients will be treated with intravaginal antibiotic. Following Placebo, patients will be evaluated every 14 days for the first month, then every month for additional 3 months (total of 4 months) After 4 months, patients who initially received placebo will be offered a VMT in case they are still symptomatic and fulfill inclusion criteria, in an open-label phase. |
saline mixed with glycerol (10-20% total concentration). |
Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Clinical parameters- patient's complains
Tidsramme: Interim analysis at 4 months from initial intervention, and final analysis at 12 months.
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participants report disappearance of discharge and odor. |
Interim analysis at 4 months from initial intervention, and final analysis at 12 months.
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Laboratory parameters- Amsel criteria
Tidsramme: Interim analysis at 4 months from initial intervention, and final analysis at 12 months.
|
Presence or absence of Amsel criteria (discharge, pH>4.5, positive whiff test and clue cells on microscopy). |
Interim analysis at 4 months from initial intervention, and final analysis at 12 months.
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Vaginal fluid microscopy
Tidsramme: Interim analysis at 4 months from initial intervention, and final analysis at 12 months.
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Defined as normal (lactobacilli dominated), BV (coccid-bacillary dominated) or mixed. |
Interim analysis at 4 months from initial intervention, and final analysis at 12 months.
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Microbiome composition
Tidsramme: Interim analysis at 4 months from initial intervention, and final analysis at 12 months.
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Characterization of the vaginal microbial community using shotgun analysis or 16S rRNA sequencing. |
Interim analysis at 4 months from initial intervention, and final analysis at 12 months.
|
Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Samarbejdspartnere
Samarbejdspartnere
Efterforskere
Efterforskere
- Ledende efterforsker: Ahinoam Lev-Sagie, Hadassah Medical Organization
Publikationer og nyttige links
Datoer for undersøgelser
Studer store datoer
Studiestart (Faktiske)
Studiestart
Primær færdiggørelse (Anslået)
Primær færdiggørelse
Studieafslutning (Anslået)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Faktiske)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Yderligere relevante MeSH-vilkår
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- HMO-19-691
Plan for individuelle deltagerdata (IPD)
Planlægger du at dele individuelle deltagerdata (IPD)?
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