Video Messages: A Tool to Improve Surrogate Decision Making.

Advance directives (ADs) offer the opportunity for patients to express their desires regarding medical care in advance of any form of incapacitation. However, the efficacy of ADs in achieving care that aligns with patients' preferences is the subject of intense ethical debate. Current instructional AD formats may not allow for expression of the reasoning or values behind a patient's care preferences, limiting their utility and efficacy. Here, we review written AD formats and their limitations, and discuss video messages, as a supplement to written ADs, as a potential improvement. While video messages have limitations of their own, their potential use as a tool for better understanding patients' wishes and values suggests a need for further research and consideration of their application and integration into standard clinical practice.

Moral equivalence theory in neonatology.

This article explores the ethical concept of "the equivalence thesis" (ET), or the idea that withdrawing and withholding life sustaining treatments are morally equivalent practices, within neonatology. We review the historical origins, theory, and clinical rationale behind ET, and provide an analysis of how ET relates to literature that describes neonatal mode of death and healthcare professional and parent attitudes towards end-of-life care. While ET may serve as an ethical tool to optimize resource allocation in theory, its clinical utility is limited given the complexity of end-of-life care decisions.

Brief Report: Interleukin-17A-Dependent Asymmetric Stem Cell Divisions Are Increased in Human Psoriasis: A Mechanism Underlying Benign Hyperproliferation.

The balance between asymmetric and symmetric stem cell (SC) divisions is key to tissue homeostasis, and dysregulation of this balance has been shown in cancers. We hypothesized that the balance between asymmetric cell divisions (ACDs) and symmetric cell divisions (SCDs) would be dysregulated in the benign hyperproliferation of psoriasis. We found that, while SCDs were increased in squamous cell carcinoma (SCC) (human and murine), ACDs were increased in the benign hyperproliferation of psoriasis (human and murine). Furthermore, while sonic hedgehog (linked to human cancer) and pifithrinα (p53 inhibitor) promoted SCDs, interleukin (IL)-1α and amphiregulin (associated with benign epidermal hyperproliferation) promoted ACDs. While there was dysregulation of the ACD:SCD ratio, no change in SC frequency was detected in epidermis from psoriasis patients, or in human keratinocytes treated with IL-1α or amphiregulin. We investigated the mechanism whereby immune alterations of psoriasis result in ACDs. IL17 inhibitors are effective new therapies for psoriasis. We found that IL17A increased ACDs in human keratinocytes. Additionally, studies in the imiquimod-induced psoriasis-like mouse model revealed that ACDs in psoriasis are IL17A-dependent. In summary, our studies suggest an association between benign hyperproliferation and increased ACDs. This work begins to elucidate the mechanisms by which immune alteration can induce keratinocyte hyperproliferation. Altogether, this work affirms that a finely tuned balance of ACDs and SCDs is important and that manipulating this balance may constitute an effective treatment strategy for hyperproliferative diseases. Stem Cells 2017;35:2001-2007.