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NovaBay Pharmaceuticals Initiates Phase 2 Clinical Trial For The Treatment Of Urinary Catheter Blockage And Encrustation

Stocks in this article: NBY

EMERYVILLE, Calif., March 2, 2011 (GLOBE NEWSWIRE) -- NovaBay Pharmaceuticals, Inc. (NYSE Amex:NBY), a clinical stage biotechnology company developing its first-in-class, anti-infective Aganocide ® compounds for the local non-systemic treatment and prevention of antibiotic-resistant infections, today provided an update on its Phase 2 clinical trial for the use of its lead compound, NVC-422, to prevent urinary catheter blockage and encrustation (UCBE) which is often a contributing factor to urinary tract infections in chronically catheterized patients.

UCBE Clinical Pathway

With recruitment beginning in December 2010, NovaBay's multi-center, randomized, double-blind proof-of-concept clinical trial compares the use of a catheter irrigation solution containing NVC-422 to the use of a saline irrigation, the most commonly used option for treating UCBE. The primary inclusion criterion is that subjects have a history of chronic episodes of UCBE. The trial design is a crossover study in which the patient serves as his/her own control. Patients will receive either NVC-422 or saline solution for a 2-week period delivered every other day via catheter irrigation. After a 2-week "washout" period, the patients will then receive a treatment with the other solution to complete the crossover design. 

Primary Outcome Measures:

  • Catheter patency following treatment

Secondary Outcome Measures:

  • Incidence of catheter blockage requiring early removal
  • Assessment of biofilm of catheter
  • Assessment of encrustation of catheter

NovaBay expects the trial to be completed in Q3 2011 with results available in Q4 2011.   NovaBay plans to discuss the Phase 2 results and the Phase 3 study protocol with the FDA and initiate a Phase 3 registration study for UCBE in 2012. NovaBay plans to seek approval for NVC-422 catheter irrigation solutions via a PMA route with the FDA Medical Devices division with the target label claim to be "maintenance of catheter patency." 

Design of the current study can be found at the following link:

Etiology of Urinary Catheter Blockage and Encrustation (UCBE)

Encrustation of catheters is a common complication in the care of many patients undergoing long-term indwelling bladder catheterization. The problem stems from infection by urease-producing bacteria, particularly Proteus mirabilis. These organisms colonize catheters, producing biofilm communities embedded in a gel-like polysaccharide matrix. The common complication of UCBE is urinary tract infections. Based on quantitative market research conducted by NovaBay, the US Market size of permanently catheterized patients is estimated to be up to 335,000 with approximately one-third chronically susceptible to UCBEs.

NovaBay's Business Strategy

NovaBay is focusing its technology on four distinct therapeutic areas: dermatology, ophthalmology, urology and hospital infections. In dermatology, the focus is on developing NVC-422 gel for impetigo and acne. NovaBay has the distinct advantage of being partnered with Galderma S.A. (Galderma), the leading dermatology company in the world. In ophthalmology, the goal is to develop an eye drop for conjunctivitis with Alcon Research Ltd. (ALCON), the world's leading ophthalmology company. In urology, NovaBay aims to reduce the incidence of urinary catheter blockage and encrustation (UCBE) and the associated urinary tract infections with an irrigation solution containing NVC-422. In hospital infection, NovaBay is targeting the six-million-patient market of chronic non-healing wounds, such as pressure, venous stasis and diabetic ulcers with its proprietary antimicrobial solution, NeutroPhase ®, which has received two 510K clearances from the Food and Drug Administration. 

NovaBay is developing commercial opportunities for its Aganocide portfolio of anti-infectives in four distinct healthcare markets: dermatology, ophthalmology, urology and hospital infections. Each of these market segments contains one or more indications that are poorly served or have no approved FDA treatments available, all with significant revenue potential. NovaBay's strategy is to address these market opportunities either through partnerships and collaborations or by building an internal organization to strategically market its own products when appropriate from a commercial standpoint.

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