Intravaginal LACTIN-V for Prevention of Recurrent Urinary Tract Infection
Intravaginal LACTIN-V for Prevention of Recurrent Urinary Tract Infection
Recurrent urinary tract infections (RUTIS) continue to be a major health problem in women and
 are now complicated by increasing antibiotic resistance. New preventive approaches are
 needed. Because most women with RUTI lack the normal protective Lactobacillus (LB) in their
 vaginal flora, we hypothesized that restoration of LB would reduce RUTIS. In this trail,
 women with recent UTI are randomized to receive either LB or placebo vaginal capsules and are
 followed for side effects, for colonization with LB and for occurrence of RUTI over hte next
 four months.
Purpose: The purpose of this study is to evaluate the safety of the vaginal suppository
 LACTIN-V (Lactobacillus crispatus CTV-05) as well as the efficacy of LACTIN-V use in
 preventing recurrent urinary tract infections (RUTI) in women. Study subjects will include
 pre-menopausal women with a history of frequent RUTI. As part of this study, we will also
 evaluate growth of lactobacilli and urinary tract infection(UTI)-causing bacteria in the
 vaginas of women following use of LACTIN-V.

 Rationale: LACTIN-V is composed of L. crispatus. L. crispatus is a bacteria found to grow
 naturally in the vaginas of healthy women. It is felt to be important in preventing vaginal
 infection and UTI. With regard to prevention of UTI, L. crispatus is thought to prevent the
 growth of UTI-causing bacteria (such as E. coli) in the vagina, and so prevent these
 UTI-causing bacteria from being able to enter the female urethra and cause infection in the
 bladder (cystitis). There is epidemiologic evidence to support this prevention mechanism, as
 absence of L. crispatus and related lactobacilli from the vagina has been associated with
 vaginal E. coli growth and with UTI. Scientific evidence supports the ability of lactobacilli
 to prevent vaginal E. coli growth by out-competing E. coli in vaginal colonization, and
 through the production of toxins such as lactic acid, hydrogen peroxide, and bacteriocins.

 LACTIN-V contains a specific strain of L. crispatus, CTV-05, which was isolated from the
 vagina of a healthy woman. It was prepared as a vaginal suppository with the purpose of
 restoring growth of healthy L. crispatus in the vaginas of women who experience frequent
 RUTI. As indicated above, these women often have a deficiency of healthy vaginal lactobacilli
 growth, and therefore may not experience the protective function of these natural organisms.
 It is hoped that use of LACTIN-V will lead to vaginal growth of protective lactobacilli in
 these women wich will, in turn, prevent the vaginal growth of E. coli and other UTI-causing
 bacteria. Phase 1 and 2 studies of LACTIN-V to date have shown this "probiotic" to be safe
 and well tolerated.

 The impetus for this study is the urgent need for non-antibiotic strategies to prevent UTI.
 UTI is one of the most common bacterial infections. It leads to substantial morbidity and
 health care costs. Frequent use of antibiotics for treatment of and prophylaxis against UTI
 is contributing to the prevalence of antibiotic resistant bacteria, which are also making it
 more difficult to treat UTI. Therefore, the potential advantage of LACTIN-V is that it is a
 natural product that may prevent UTI without the use of antibiotics. If it proves to be
 efficacious, it could decrease the morbidity and health care costs associated with UTI as
 well as decrease overall antibiotic use and the corresponding prevalence of antibiotic
 resistance among UTI-causing bacteria.

 Primary Objective: The primary objective is to evaluate the safety of LACTIN-V, compared to
 placebo, in pre-menopausal women with recurrent uncomplicated UTI.

 Secondary objectives:

 1. To evaluate the efficacy of LACTIN-V, compared to placebo, in reducing the incidence of
 Symptomatic and Probable UTI (defined below).

 2. To evaluate the efficacy of LACTIN-V, compared to placebo, in decreasing the time to
 recurrence of Symptomatic and Probable UTI.

 3. To evaluate the efficacy of LACTIN-V, compared to placebo, in reducing the prevalence of
 Asymptomatic UTI (defined below).

 4. To evaluate vaginal growth of CTV-05 in subjects using LACTIN-V compared to placebo.

 5. To evaluate vaginal growth of lactobacilli in subjects using LACTIN-V compared to
 subjects using placebo.

 6. To evaluate vaginal growth of E. coli in subjects using LACTIN-V compared to subjects
 using placebo.

 Case Definitions:

 Symptomatic UTI: One or more UTI symptoms (dysuria, urgency, frequency, suprapubic pain,
 flank pain), with a positive urine culture. In symptomatic subjects, a positive urine culture
 is defined as >= 10^2/ml of an UTI-causing bacteria. UTI episodes will be recorded as
 Symptomatic UTI if a negative urine culture at Visit 2, or at another interim study visit,
 confirms resolution of the prior UTI (in order to distinguish a new Symptomatic UTI from a
 Persistent UTI).

 Asymptomatic UTI: A positive urine culture in a subject who reports no urinary symptoms. In
 asymptomatic subjects, a positive urine culture is defined as >= 10^5/ml of an UTI-causing
 bacteria. UTI episodes will be recorded as Asymptomatic UTI if a negative urine culture at
 Visit 2, or at another interim study visit, confirms resolution of the prior UTI (in order to
 distinguish a new Asymptomatic UTI from a Persistent UTI).

 Probable UTI: One or more UTI symptoms (dysuria, urgency, frequency, suprapubic pain, flank
 pain) in a subject who contacted a healthcare provider and was treated with antibiotics for a
 UTI without confirmatory urine culture. UTI episodes will be recorded as Probable UTI if a
 negative urine culture at Visit 2, or at another interim study visit, confirms resolution of
 the prior UTI (in order to distinguish a new Probable UTI from a Persistent UTI).

 Persistent UTI: A positive urine culture following antibiotic treatment for a UTI.

 General Procedures: This will be a randomized, double-blind, placebo-controlled trial of
 LACTIN-V. Subjects will include 100 pre-menopausal women with a history of frequent RUTI who
 are currently or recently being treated for a symptomatic UTI with
 trimethoprim-sulfamethoxazole. Trimethoprim-sulfamethoxazole is one of several antibiotics
 considered standard-of-care for treatment of symptomatic UTI. Subjects will be randomized
 such that 50 women will receive LACTIN-V at a dose of 5x10^8 CFU/suppository and 50 women
 will receive placebo. LACTIN-V and placebo are to be taken once per day for five days during
 the first week of use followed by once per week for 10 weeks on Days 8, 15, 22, 29, 36, 43,
 50, 57, 64, and 71 for a total of 15 doses over 11 weeks. Subjects will undergo five
 scheduled visits and receive two telephone calls:

 Visit 1 is the Screening Visit. This visit will take place during or soon after evaluation
 for a symptomatic UTI. The following will occur during Visit 1: informed consent, review of
 eligibility, history, physical exam, pelvic exam, Pap smear, urine pregnancy test, and
 screening tests for gonorrhea, chlamydia, bacterial vaginosis, yeast, and trichomonas.
 Subjects will provide urine samples for microscopic analysis, dipstick analysis, culture, and
 antibiotic susceptibility testing and vaginal fluid specimens for laboratory assessment of
 vaginal growth of lactobacilli (including CTV-05).

 Visit 2 is the Randomization Visit and represents Week 1 of the study. Visit 2 will take
 place 3-10 days after completion of antibiotic therapy for UTI. Subjects will have their
 eligibility confirmed and undergo a focused pelvic exam without speculum or bimanual exam
 unless clinically indicated, have a screening test for bacterial vaginosis, yeast, and
 trichomonas, and have a repeat pregnancy test. Subjects will also provide urine and vaginal
 fluid specimens as in Visit 1. Subjects will then be randomized to LACTIN-V or placebo.
 Subjects will place the first suppository under supervision and will be instructed to use a
 7-day study calendar to record study product use and related symptoms during the first week,
 and to use a 10-week study calendar to record study product use and related symptoms
 thereafter.

 Day 4-7 phone call: The purpose of this phone call is to assess use of the study product as
 well as any associated symptoms.

 Visit 3 will occur during Week 2, days 8-14 following randomization. Subjects will be asked
 about study product use, adverse events, and symptoms. Subjects will undergo focused physical
 and pelvic exams without speculum or bimanual exam unless clinically indicated. Subjects will
 have a screening test for bacterial vaginosis and provide urine and vaginal fluid specimens
 as before.

 Visit 4 will occur during Week 11 and will be similar to Visit 3.

 Visit 5 will occur during Week 16. The procedures for Visit 5 will be similar to those of
 Visits 3 and 4. However, during this visit, subjects will undergo a complete pelvic exam
 including speculum and bimanual exams and undergo a repeat pregnancy test.

 9 Month telephone call: The purpose of this phone call is to assess the occurrence of adverse
 events, symptoms of UTI, new UTI or other medical diagnoses,and pregnancy.

 In addition to the above schedules visits, subjects will be asked to come to the research
 clinic for Unscheduled Visits if they experience any adverse events or new symptoms of UTI.
 During these unscheduled visits, subjects will undergo history, physical and complete pelvic
 exams, screening tests for bacterial vaginosis, yeast, and trichomonas, as well as for other
 sexually transmitted diseases as clinically indicated. Subjects will provide urine samples
 for microscopic analysis, dipstick analysis, culture, and antibiotic susceptibility testing.
 Subjects will provide vaginal fluid samples for assessment of CTV-05, lactobacillus, and E.
 coli growth.

 Subjects diagnosed with a Symptomatic UTI during the study will be treated with an
 antibiotic. They will then be asked to return to the study clinic for a follow-up urine
 culture two weeks later to confirm UTI resolution.

 Laboratory procedures will include:

 -  wet mount slides of vaginal fluid (all Visits)

 -  urine dipstick testing (all Visits)

 -  urine pregnancy testing (Visits 1, 2, and 5)

 -  Pap smear (Visit 1)

 -  Testing for gonorrhea and chlamydia by culture (Visit 1, other visits as indicated)

 -  urinalysis (all Visits)

 -  urine culture (all Visits)

 -  gram stain and culture of vaginal fluid specimens (All Visits)

 -  Rep-PCR for CTV-05 (Visits 2-5)

 -  DNA amplification of vaginal flora (all Visits)

 Statistical Analysis: The primary cohort for analysis will be the intent-to-treat (ITT)
 cohort. The ITT cohort is defined as subjects who are randomized in the study. Other cohorts
 to be evaluated will include the modified ITT, Evaluable, and according-to-protocol cohorts.
Inclusion Criteria:

 -  pre-menopausal woman aged 18-40 years

 -  current symptomatic uncomplicated cystitis

 -  cystitis is treated with trimethoprim-sulfamethoxazole (TMP-SMX)

 -  completion of screening procedures

 -  negative screening monolayer Pap smear or hysterectomy

 -  history of at least two prior symptomatic UTI's treated within the past 12 months or
 one pior symptomatic UTI treated in the past six months

 -  agree to return for the Randomization Visit (Visit 2)

 -  regular menstrual cycles or amenorrheic due to use of a long acting progestin,
 continuous use of oral contraceptives or hysterectomy

 -  willing to insert vaginal capsules without an applicator

 -  capable of providing informed consent

 -  able to read and understand English

 -  agree to abstain from self-medication with antibiotics for UTI symptoms

 -  agree to abstain from antibiotic prophylaxis for recurrent UTI

 -  agree to abstain from the use of any other intra-vaginal product

 -  agree to abstain from sexual intercourse for 24 hours after capsule insertion

 -  agree to not use tampons for 24 hours after capsule insertion

 -  agree to use an adequate method of birth control

 Exclusion Criteria:

 -  complicated cystitis or uncomplicated pyelonephritis.

 -  cystitis at Visit 1 not treated with TMP-SMX

 -  uropathogen resistant to TMP-SMX isolated at Visit 1 and persistent symptoms at Visit
 2 or failure to achieve a significant reduction in urine wbc count at Visit 2

 -  vaginal or cervical infection, currently or within the past 21 days, with bacterial
 vaginosis (treated, symptomatic infection), Trichomonas vaginalis, Neisseria
 gonorrhoeae, Chlamydia trachomatis or Herpes Simplex

 -  symptomatic bacterial vaginosis at Visit 1

 -  high risk for sexually transmitted diseases and/or HIV, including:

 1. diagnosis of N. gonorrhoeae, C. trachomatis or T. vaginalis on two or more
 occasions during the previous six months;

 2. sexual intercourse with a homosexual/bisexual male in the last 10 years;

 3. sexual intercourse with an injection drug user or sex worker in the last 10
 years; or

 4. shared needles for injected drugs in the last 10 years.

 -  chronic vaginal, urinary or pelvic symptoms not attributable to UTI

 -  recurrent bacterial vaginosis (three or more symptomatic, treated infections in the
 prior 12 months)

 -  pregnancy or within two months of last pregnancy

 -  lactation

 -  antibiotic therapy fewer than three days prior to Randomization Visit

 -  antifungal therapy fewer than seven days prior to the Randomization Visit

 -  Antibiotics planned within four months

 -  abnormal Pap smear requiring a procedure for diagnosis or treatment in the past 12
 months

 -  use of CTV-05 within one year of the Randomization Visit

 -  menopause

 -  use of a NuvaRing planned during the course of the study

 -  any significant disease or acute illness that in the Investigator's assessment could
 complicate the evaluation

 -  known HIV infection

 -  immunosuppressive drug within 60 days

 -  known allergy to any component of LACTIN-V or the placebo capsule

 -  unavailable for follow-up visits

 -  drug or alcohol abuse within past two years

 -  any social or medical condition that, in the opinion of the Investigator, would
 preclude provision of informed consent, make participation in the study unsafe,
 complicate interpretation of study outcome data, or otherwise interfere with achieving
 the study objectives