BASIC study: is intravaginal boric acid non-inferior to metronidazole in symptomatic bacterial vaginosis? Study protocol for a randomized controlled trial.

BACKGROUND: Bacterial vaginosis is associated with increased transmission of sexually transmitted infections, preterm labor, post-surgical infections, and endometritis. Current treatment for symptomatic bacterial vaginosis includes antibiotics, such as metronidazole, which are 70-80 % effective at one month after treatment and result in high recurrence rates and secondary candida infections. Intravaginal boric acid has been used for over a hundred years to treat vaginal infections, such as bacterial vaginosis. Boric acid is inexpensive, accessible, and has shown to be an effective treatment for other infections, such as vaginal candidiasis. To date, there has been no clinical trial evaluation of boric acid effectiveness to treat bacterial vaginosis. METHODS/DESIGN: The BASIC (Boric Acid, Alternate Solution for Intravaginal Colonization) trial is a randomized, double-blinded, multicenter study. The study will enroll a minimum of 240 women of 16-50 years of age who are symptomatic with bacterial vaginosis. Eligible participants will have Amsel and Nugent scores confirming bacterial vaginosis. Women who are pregnant or menopausal or have other active co-infections will be excluded. Consenting participants who meet exclusion and inclusion criteria will be randomly assigned to one of three treatment groups: boric acid, metronidazole, or an inert placebo. Self-administration of treatment intravaginally for 10 days will be followed by clinical assessment at 7 and 30 days (days 17 and 40, respectively) after the end of the treatment phase. Primary outcome is a non-inferiority, per-protocol comparison of the effectiveness of boric acid with that of metronidazole at day 17, as measured by the Nugent score in 16-50 year olds. Secondary outcomes include: non-inferiority, intention-to-treat comparison of effectiveness of boric acid with that of metronidazole at day 17, analysis for both per-protocol and intention-to-treat at day 40, and safety considerations, including adverse effects requiring patient discontinuation of treatment. DISCUSSION: This study will be the first to determine whether intravaginal boric acid is non-inferior to metronidazole in the treatment of bacterial vaginosis in symptomatic women. TRIAL REGISTRATION: ClinicalTrials.gov NCT00799214, registered online Nov 10, 2008.

Striatal neuronal apoptosis is preferentially enhanced by NMDA receptor activation in YAC transgenic mouse model of Huntington disease.

Huntington disease (HD), caused by expansion >35 of a polyglutamine tract in huntingtin, results in degeneration of striatal medium spiny neurons (MSNs). Previous studies demonstrated mitochondrial dysfunction, altered intracellular calcium release, and enhanced NMDAR-mediated current and apoptosis in cellular and mouse models of HD. Here, we exposed cultured MSNs from YAC transgenic mice, expressing full-length human huntingtin with 18, 72, or 128 repeats, to a variety of apoptosis-inducing compounds that inhibit mitochondrial function or increase intracellular calcium, and assessed apoptosis 24 h later. All compounds produced a polyglutamine length-dependent increase in apoptosis, but NMDA produced the largest potentiation in apoptosis of YAC72 and YAC128 versus YAC18 MSNs. Moreover, reduction of NMDAR-mediated current and calcium influx in YAC72 MSNs to levels seen in wild-type reduced NMDAR-mediated apoptosis proportionately to wild-type levels. Our results suggest that increased NMDAR signaling plays a major role in enhanced excitotoxic MSN death in this HD mouse model.