Determining the potential for malignant transformation of oral lichen planus (OLP) is complicated by difficulties in diagnosis, differentiation from oral lichenoid lesions (OLLs) and the phenomenon ...of premalignant lesions' exhibiting lichenoid characteristics. The authors of this systematic review evaluated evidence regarding malignant transformation of OLP and characterized transformation prevalence, clinical characteristics of OLP lesions developing into squamous cell carcinoma (SCC) and time to transformation.
The authors searched PubMed, Embase and Thomson Reuters Web of Science in a systematic approach. They evaluated observational English-language studies involving human participants published in peer-reviewed journals. Inclusion required patients to have the diagnosis of OLP or OLL as confirmed with biopsy results on initial enrollment. They excluded all patients who had dysplasia on initial biopsy of OLP or OLL lesions.
Sixteen studies were eligible. Among 7,806 patients with OLP, 85 developed SCC. Among 125 patients with OLL, four developed SCC. The rate of transformation in individual studies ranged from 0 to 3.5 percent. The overall rate of transformation was 1.09 percent for OLP; in the solitary study in which investigators evaluated OLL, the rate of transformation was 3.2 percent. Patients' average age at onset of SCC was 60.8 years. The authors noted a slight predominance of female patients among those who experienced malignant transformation. The most common subsite of malignant transformation was the tongue. The average time from diagnosis of OLP or OLL to transformation was 51.4 months.
A small subset of patients with a diagnosis of OLP eventually developed SCC. The most common demographic characteristics of patients in this subset were similar to the most common demographic characteristics associated with OLP in general (that is, being female, being older and being affected in areas common to this condition). It is prudent for clinicians to pursue continued regular observation and follow-up in patients with these conditions, even in patients who do not fit a traditional high-risk category for oral SCC.
We recognize well the abilities of dendritic cells to activate effector T cell (Teff cell) responses to an array of antigens and think of these cells in this context as pre-eminent antigen-presenting ...cells, but dendritic cells are also critical to the induction of immunologic tolerance. Herein, we review our knowledge on the different kinds of tolerogenic or regulatory dendritic cells that are present or can be induced in experimental settings and humans, how they operate, and the diseases in which they are effective, from allergic to autoimmune diseases and transplant tolerance. The primary conclusions that arise from these cumulative studies clearly indicate that the agent(s) used to induce the tolerogenic phenotype and the status of the dendritic cell at the time of induction influence not only the phenotype of the dendritic cell, but also that of the regulatory T cell responses that they in turn mobilize. For example, while many, if not most, types of induced regulatory dendritic cells lead CD4(+) naïve or Teff cells to adopt a CD25(+)Foxp3(+) Treg phenotype, exposure of Langerhans cells or dermal dendritic cells to vitamin D leads in one case to the downstream induction of CD25(+)Foxp3(+) regulatory T cell responses, while in the other to Foxp3(-) type 1 regulatory T cells (Tr1) responses. Similarly, exposure of human immature versus semi-mature dendritic cells to IL-10 leads to distinct regulatory T cell outcomes. Thus, it should be possible to shape our dendritic cell immunotherapy approaches for selective induction of different types of T cell tolerance or to simultaneously induce multiple types of regulatory T cell responses. This may prove to be an important option as we target diseases in different anatomic compartments or with divergent pathologies in the clinic. Finally, we provide an overview of the use and potential use of these cells clinically, highlighting their potential as tools in an array of settings.
► S100A8 reduces PMN inflammation and oxidative damage caused by LPS. ► Activating PAR2 enhances the protective effect of S100A8 in endotoxemic mice. ► S100A8 and PAR2 synergize and significantly ...reduce the mortality caused by LPS.
Polymorphonuclear neutrophils (PMNs) produce and release copious amounts of reactive oxygen species (ROS) which target potential bacterial invaders but also contribute to the inflammation-associated organ injuries seen in sepsis. Calprotectin is an immune regulatory protein complex made of S100A8 and S100A9 that inhibits the oxidative metabolism of PMNs in vitro, an effect that can be potentiated by the controlled activation of the protease activated receptor-2 (PAR2). The aim of this study was to test the use of a dual strategy of calprotectin and PAR2 administration to mitigate the deleterious inflammation seen in sepsis. We hypothesized that exogenous calprotectin would protect against the injuries produced by lipopolysaccharides (LPS)-induced endotoxemia and that the controlled activation of PAR2 would potentiate this beneficial effect.
Exogenous S100A8 and/or a PAR2 activating peptide (PAR2 AP) were administered in a mouse model of LPS induced endotoxemia. The survival rates as well as markers of inflammation and oxidative damage were measured in the lungs, kidneys, and livers of endotoxemic mice.
Mice treated with S100A8 following LPS had less PMN infiltration and less severe histological changes in their lungs, kidneys, and livers. A significantly lower score of oxidative damage in the livers and lungs of S100A8/LPS treated mice was also noted when compared to mice treated with LPS alone. This protective and anti-inflammatory effect of S100A8 was potentiated by the controlled activation of PAR2. Finally, in further support to our hypothesis, the survival rate was almost doubled from 33% to 65% and 63% in mice treated by, respectively, S100A8 and PAR2 AP, whereas 85% of the mice treated with both PAR2 AP and S100A8 survived, a statistically significant higher rate.
These results support an anti-inflammatory, anti-oxidative, and protective effect of S100A8 in sepsis, and warrant further studies on the role of PAR2.
Interprofessional education (IPE) is a relatively new part of dental education. Its implementation is mandated by accreditation standards, but it is also essential to good patient care. Diverse ...dental schools from various regions of North America outline problems they have faced in IPE and the solutions that they have found to surmount these problems. Commonalities and unique features of these problems and solutions are discussed.
Objective Patients are at risk of harm from medication errors. Barcode medication administration (BCMA) systems are recommended to mitigate preventable adverse drug events (ADEs). Our hypothesis was ...that a BCMA system would reduce preventable ADEs by 45% in a neonatal intensive care unit. Study design We conducted a prospective, observational, cohort study of a BCMA system intervention in a neonatal intensive care unit. Participants were admitted neonates during 50 weeks. Medication errors and potential or preventable ADEs were detected by a daily structured audit of each subject's medical record, with assignment of an event as a preventable ADE made by blinded assessors. The generalized estimating equation method was used in modeling the targeted, preventable ADE rate with covariates. Results A total of 92 398 medication doses were administered to 958 subjects. The generalized estimating equation method yielded a relative risk of preventable ADE when the system was implemented of 0.53 (95% confidence limits 0.29 to 0.91, P = .04), adjusted for log10 doses of medication/subject/day, a significant predictive covariate ( P < .001), as well as for birth weight, sex, Caucasian race, birth cohort number, and nursing hours/subject/day. Conclusion The BCMA system reduced the risk of targeted, preventable ADEs by 47%, controlling for the number of medication doses/subject/day, an important risk exposure.
Purpose:
Completion of postgraduate residency training gives pharmacists an opportunity to gain advanced practice experience, yet the availability of these positions is often limited. Through ...participation in an investigational drug service (IDS), residency programs may be able to expand learning experiences while demonstrating a financial benefit to the institution. The purpose of this assessment is to examine the economic value generated by pharmacy resident involvement within an IDS.
Methods:
This was a single-center retrospective record review. All resident dispensations within the IDS from January 1, 2016, to December 31, 2017, were evaluated for cost avoidance, revenue, and waived revenue. Cost avoidance was defined as the cost of medications the institution would have incurred had the sponsor not provided therapies free of charge. Medical center contract acquisition costs were used to determine cost avoidance. Total economic value accounted for the personnel costs of resident dispensations. Descriptive statistics were utilized for all assessments.
Results:
A total of 444 resident dispensations occurred during the study period on 15 IDS protocols. The total cost avoidance for resident dispensations was US$144 898. Total revenue for these dispensations was US$1424, and waived revenue fees totaled US$17 625. After accounting for the personnel cost of dispensations by the residents, the total economic value of resident participation in the IDS was US$159 150.
Conclusion:
Resident participation in the IDS contributed economic value to the institution. The IDS provides a unique learning experience for the pharmacy residents, cost savings for the institution, and supports the advancement of patient care.
Tobacco use is the leading preventable cause of morbidity and premature mortality and is a significant factor in the development of oral disease. Tobacco dependence education (TDE) has not, however, ...been consistently integrated into predoctoral education. The authors conducted a study assessing the content and extent of TDE and intervention skills in US and Canadian dental schools.
In 2013, the authors contacted the academic deans of the 74 accredited US and Canadian dental schools to identify the educator who would be most appropriately described as the tobacco-use cessation "champion" at their institution. The authors e-mailed an introductory letter to each school's champion with a hyperlink to a 45-item survey; 2 follow-up emails were sent with links to the survey.
The response rate was 66% (N = 49). TDE was taught at 92% of dental schools; 90% of respondents indicated that faculty members were confident to extremely confident in teaching tobacco-related pathology. Only 49% reported this level of confidence in teaching students how to help patients quit tobacco. TDE is taught in periodontics (82%), oral pathology (77%), clinic (66%), oral diagnosis (59%), public health dentistry (55%), pharmacology (55%), oral medicine (52%), and other disciplines (less than 50%).
The survey responses revealed that TDE is not a curricular component in all US and Canadian dental schools. Faculty members were most confident in teaching tobacco-related pathology but may lack the interest and skills needed to integrate TDE as part of patient care.
Patients who use tobacco in any form are at an increased risk of developing periodontitis, developing oral cancer, and having poorer surgical outcomes, emphasizing the need for the dental team to be well-prepared through predoctoral dental education.
The etiology of idiopathic cervical root resorption has not been elucidated clearly. However, the process has been linked to trauma, intracanal bleaching, and partial-thickness connective tissue ...grafts.
This study describes a familial pattern of multiple idiopathic cervical root resorption in a father and son.
The father was a healthy 63-year-old white male who presented with the first resorption lesion in 1983. Twenty-seven additional lesions were identified on 16 teeth over 22 years. Five teeth were lost as a result of extensive resorption. The son was a healthy 43-year-old when a resorption lesion was identified in 1993. A lesion identified on another tooth 12 years later resulted in extraction.
Close relatives of those affected by multiple idiopathic cervical root resorption should be examined carefully for cervical resorption. This study also showed that early treatment can prevent or delay the need for extraction.
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