Brain-targeted delivery of PEGylated nano-bacitracin A against Penicillin-sensitive and -resistant Pneumococcal meningitis: formulated with RVG29 and Pluronic® P85 unimers.

Pneumococcal meningitis (PM), caused by Streptococcus pneumonia, remains a high-burden disease in developing countries. Antibiotic therapy has been limited due to the inefficiency of drug transport across the blood-brain barrier (BBB) and the emergence of drug-resistant strains. In our preliminary study, PEGylated nano-self-assemblies of bacitracin A (PEGylated Nano-BA12K) demonstrated a strong antibacterial potency against S. pneumonia. In this study, the potential application of this micelle for the treatment of both Penicillin-sensitive and -resistant PM was studied. To address BBB-targeting and -crossing issues, PEGylated Nano-BA12K was formulated with a specific brain-targeting peptide (rabies virus glycopeptide-29, RVG29) and a P-glycoprotein inhibitor (Pluronic® P85 unimers) to construct a mixed micellar system (RVG29-Nano-BAP85). RVG29-Nano-BAP85 demonstrated a strong antibacterial potency against 13 clinical isolates of S. pneumonia, even higher than that of Penicillin G, a conventional anti-PM agent. RVG29-Nano-BAP85 had more cellular uptake in brain capillary endothelial cells (BCECs) and higher BBB-crossing efficiency than single formulated Nano-BAs as shown in an in vitro BBB model. The enhanced BBB-permeability was attributed to the synergetic effect of RVG29 and P85 unimers through receptor-mediated transcytosis, exhaustion of ATP, and reduction in membrane microviscosity. In vivo results further demonstrated that RVG29-Nano-BAP85 was able to accumulate in brain parenchyma as confirmed by in vivo optical imaging. In addition, RVG29-Nano-BAP85 exhibited high therapeutic efficiencies in both Penicillin-sensitive and -resistant PM mouse models with negligible systemic toxicity. Collectively, RVG29-Nano-BAP85 could effectively overcome BBB barriers and suppressed the growth of both drug-sensitive and -resistant S. pneumonia in the brain tissues, which demonstrated its potential for the treatment of PM.

Clinical efficacy and safety of herbal medicine Dermidoc in the management of atopic dermatitis versus allopathic medicine PolymixinB-bacitrin ointment.

Atopic dermatitis (AD) commonly identified as eczema. AD is an inflammatory, long-lasting, highly pruritic reverting disease of the skin. AD is classified by disease of outer skin layer barrier function. AD is progress with Immunoglobulin E facilitated sensitization to food and environmental allergens. One study stated that more than 59.6% of teen-agers with AD are at high risk of develop asthma or rhinitis. Interaction between genes and environment increase the prevalence of AD. AD have three standard stages: infantile, childhood, and adulthood. AD sign and symptoms diverge extensively. AD can be present that simply affect the hand to where a patient presents with erythroderma. AD present with erythematous papules, extremely pruritic with serous exudate. Lichenified plaques and papules are symptoms of long lasting AD. Due to outer skin layer barrier dysfunction bacterial and viral infection risk is increased in AD patients. This study was directed on 100 patients in which 50 are PolymixinB-bacitrin group and 50 are Dermidoc group. Patients were selected after seeing inclusion and exclusion criteria and taking written informed consent. Dermidoc group expressively amended skin symptoms associated with AD comparing to the PolymixinB-bacitrin group. The Dermidoc cream is effective and well tolerated. The results were analysis using paired sample t-test. The p value is <0.05. Test group (Dermidoc) were significantly more effective than PolymixinB-bacitrin group.

Contact dermatitis to topical medicaments: a retrospective chart review from the Ottawa Hospital Patch Test Clinic.

BACKGROUND: Topical medicaments are a common cause of allergic contact dermatitis. This study will evaluate the prevalence of contact allergy to a wide array of topical medicaments at the Ottawa Patch Test Clinic. OBJECTIVES: The objectives of this study are to report the results of positive patch testing to topical medicaments at the Ottawa Patch Test Clinic and identify common sensitizers in topical medicaments. METHODS: Patients were tested with the standard North American Contact Dermatitis screening series of 70 allergens plus supplementary allergens when indicated. A retrospective chart review of patients positive to topical medicaments between January 1, 2000, and September 30, 2010, was undertaken. RESULTS: The average age of patients was 49.5 years. Thirty-four percent were atopic. Common sensitizers included topical antibiotics (58%), steroids (30%), anesthetics (6%), and antifungals (6%). Patch testing showed that 61% of patients tested positive to antibiotics, 21% to topical steroids, 17% tested positive to topical anesthetics, and 1% tested positive to topical antifungals. The most common reactions were to bacitracin (44%) and neomycin (29%). The most common steroid screener was tixocortol-17-pivalate (group A) (19%), and the most common local anesthetic was lidocaine (12%). CONCLUSIONS: Topical medicaments of all kinds are common causes of allergic contact dermatitis. Those that are more readily available, in over-the-counter preparations, are the most frequent culprits.

[Use of neomycin-bacitracin irrigating solution with intraoperative autotransfusions during orthopedic operations]. / Anwendung von Neomycin-Bacitracin-Spüllösung bei intraoperativer Autotransfusion während orthopädischer Operationen.

Although there is doubt about the importance of rinsing the operative field with a solution containing locally acting antibiotics, it is frequently done. In this paper we tried to answer the question, wether intraoperative autotransfusion (IAT) with the Haemonetics Cell Saver is contraindicated during rinsing the operative area with locally acting antibiotics or vice versa. The measured serum concentrations for neomycin and bacitracin (Nebacetin) were extremely low. Therefore IAT is recommended with a system separating and washing the autologous red blood cells even under circumstances of rinsing the operative field with a solution containing locally acting antibiotics.