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IntroductionOral squamous cell carcinoma (OSCC), is associated with high morbidity and mortality. Preemptive interventions have been postulated to provide superior therapeutic options, but their implementation has been restricted by the availability of broadly applicable local delivery systems.MethodsWe address this challenge by engineering a delivery vehicle, Janus nanoparticles (JNP), that combine the dual mucoadhesive properties of a first cationic chitosan compartment with a second hydrophobic poly(lactide-co-glycolide) release compartment. JNP are designed to avoid rapid mucus clearance while ensuring stable loading and controlled release of the IL-6 receptor antagonist, tocilizumab (TCZ).ResultsThe JNP featured defined and monodispersed sizes with an average diameter of 327 nm and a PDI of 0.245, high circularities above 0.90 and supported controlled release of TCZ and effective internalization by oral keratinocytes. TCZ released from JNP retained its biological activity and effectively reduced both, soluble and membrane-bound IL-6Rα (71% and 50%). In full-thickness oral mucosal explants, 76% of the JNP breached the stratum corneum and in 41% were observed in the basal cell layer indicating excellent mucopenetrating properties. When tested in an aggressive OSCC xenograft model, TCZ-loaded JNP showed high levels of xenograft inhibition and outperformed all control groups with respect to inhibition of tumor cell proliferation, reduction in tumor size and reduced expression of the proto-oncogene ERG.ConclusionBy combining critically required, yet orthogonal properties within the same nanoparticle design, the JNP in this study, demonstrate promise as precision delivery platforms for intraoral field-coverage chemoprevention, a vastly under-researched area of high clinical importance.

Pyoderma gangrenosum (PG) is a distinctive ulcerative skin disorder of unknown etiology, associated with an underlying systemic disease in up to 70% of cases. The condition is characterized by the appearance of one or more necrotic ulcers with a ragged undermined violaceous border and surrounding erythema. Lesions are often initiated by minor trauma. The condition can affect any anatomical site, however the head and neck are rarely involved. Although the oral cavity is subject to recurrent minor trauma through everyday activities such as mastication and oral hygiene, as well as during dental treatment, oral lesions appear to be extremely rare. In an effort to provide a detailed explanation of the oral manifestations of PG, a systematic search was conducted using medical databases. A total of 20 cases of PG with oral involvement were reported in the English and French literature. The objectives of this article are to present the pertinent diagnostic criteria and to discuss the differential diagnosis and therapeutic modalities.

Deep fungal infections rarely involve the oral cavity and most commonly affect immunocompromised patients. Oral deep fungal infections typically manifest as chronic mucosal ulcerations or granular soft tissue overgrowths. Since these lesions are non-specific and can mimic malignancy, it is crucial to obtain a thorough clinical history and an adequate biopsy to render the appropriate diagnosis. We report four new cases of deep fungal infections, diagnosed as histoplasmosis, blastomycosis and chromoblastomycosis, exhibiting unique oral and perioral presentations. Awareness of these unusual entities can help dental and medical practitioners expedite proper multidisciplinary care and minimize morbidity and mortality.

Neutrophils and eosinophils are important sources of bioactive lipids from the 5- and the 15-lipoxygenase (LO) pathways. Herein, we compared the effectiveness of humans eosinophils and eosinophil-depleted neutrophils to synthesize 15-LO metabolites using a cocktail of different 15-LO substrates as well as their sensitivities to eight documented 15-lipoxygenase inhibitors. The treatment of neutrophils and eosinophils with linoleic acid, dihomo-γ-linolenic acid, arachidonic acid, eicosapentaenoic acid, docosahexaenoic acid and arachidonyl-ethanolamide, led to the synthesis of 13-HODE, 15-HETrE, 15-HETE, 15-HEPE, 14-HDHA/17-HDHA, and 15-hydroxy-AEA. Neutrophils and eosinophils also metabolized the endocannabinoid 2-arachidonoyl-glycerol into 15-HETE-glycerol, although this required 2-arachidonoyl-glycerol hydrolysis inhibition. Neutrophils and eosinophils differed in regard to dihomo-γ-linolenic acid and linoleic acid utilization with 15-HETrE/13-HODE ratios of 0.014 ± 0.0008 and 0.474 ± 0.114 for neutrophils and eosinophils respectively. 15-LO metabolite synthesis by neutrophils and eosinophils also differed in regard to their relative production of 17-HDHA and 14-HDHA.The synthesis of 15-LO metabolites by neutrophils was concentration-dependent and rapid, reaching a plateau after one minute. While investigating the biosynthetic routes involved, we found that eosinophil-depleted neutrophils express the 15-lipoxygenase-2 but not the 15-LO-1, in contrast to eosinophils which express the 15-LO-1 but not the 15-LO-2. Moreover, 15-LO metabolite synthesis by neutrophils was not inhibited by the 15-LO-1 inhibitors BLX769, BLX3887, and ML351. However, 15-LO product synthesis was partially inhibited by 100 μM NDGA. Altogether, our data indicate that the best 15-LO-1 inhibitors in eosinophils are BLX3887, BLX769, NDGA and ML351 and that the synthesis of 15-LO metabolites by neutrophils does not involve the 15-LO-1 nor the phosphorylation of 5-LO on Ser-663 but is rather the consequence of 15-LO-2 or another unidentified 15-LO.

To evaluate the preliminary effectiveness of a personalized intervention integrating pre-recorded hypnosis and/or music in palliative and end-of-life care, and explore patient preferences and experiences. Forty patients receiving palliative and end-of-life care at home were recruited and randomly assigned to the experimental group or the control/delayed intervention group. Two intervention sessions were conducted within one week, featuring the following modalities tailored to patient preferences: pre-recorded music, hypnosis, or a combination of music and hypnosis. Participants provided self-ratings of their symptoms and distress at predetermined time points using the Edmonton Symptom Assessment Scale and the Distress Thermometer. We used a mixed-effects model to address the quantitative objectives, and we conducted a content analysis to meet the qualitative objectives. The intervention program significantly reduced participants’ distress, showing a medium effect size when comparing the intervention sessions to the control sessions. We also found a medium effect size for improved well-being between groups. Intervention modality did not appear to affect the responses. Participants reported calmness and well-being. The voluntary use of these interventions post-experiment emphasizes their relevance for palliative and end-of-life care. The qualitative findings were consistent with the quantitative results, and revealed additional potential uses and ways to improve the intervention. The personalized pre-recorded music and hypnosis interventions appear to be effective in reducing distress and show great potential for enhancing the overall well-being of individuals in palliative and end-of-life care. Further studies are needed to determine how these findings can be applied to a broader population. •MuzHyp program decreased distress and enhanced participants’ overall well-being.•Caregiver presence contributed to symptom relief, highlighting the human role.•Most participants chose an intervention with music, likely due to its familiarity.•Some continued MuzHyp post-study, reporting better sleep, comfort, and pain control.•The program is cost-effective, easy to use, and adaptable for independent applications.

Extracellular vesicles (EVs) are released naturally and from cells and tissues into biological fluids such as plasma, urine, saliva and amniotic fluid, and into culture medium. EV may contain proteins, lipids, mRNA and miRNA significant of the physiological status or of their cellular origin and affect the functions of neighboring cells. The characterization of EVs present in HIV-1-infected individuals provides insight into pathogenesis, inflammation and disease progression. However, the potential of EVs to become reliable research or diagnostic tools is currently limited by the difficulty of distinguishing apoptotic and plasma membrane EVs, exosomes and virions. In spite of this methodological limitation, EVs are expected to become highly useful tools in biomedicine and uncover a research area expected to lead to innovative R&D.

The challenge facing national policymakers is to provide health care that is comprehensive and cost-effective to our nation's growing population of elderly people. A solution worthy of consideration is the use of health maintenance organizations (HMOs) in this capacity. An analysis of the services provided by a multidisciplinary health care system to 150 inner-city elderly, many of whom were \"homebound,\" reveals 1) this population is not homogeneous with respect to severity of disease and service utilization, and 2) a total mean cost per individual per year of $2,021.34 covers: physician, nursing, and social service home visits; visiting nurse, homemaker, home health aide, occupational therapy and physical therapy services; outpatient, laboratory and medication costs. These findings suggest that while costs for those over 65 are many times the per capita costs of younger enrollees, these costs may be significantly less than the costs of institutional care. Further investigation of the costs of maintaining low-income inner-city old, as well as other elderly populations, at home is vital to planning for future long-term care.