Chitin-lipid interactions and the potential relationship between Demodex and SARS-CoV-2.

Already from the early days of the COVID-19 pandemic, regulatory agencies have attempted to ascertain the possible routes of SARS-CoV-2 viral transmission. It is hypothesized that the lipid bilayer that surrounds the SARS-CoV-2 improves its ability to remain stable on sebum-rich skin and serves as another possible route of contracting the virus. One possible aspect of these observations that has yet to be explored in detail is what role arthropods that have been associated with human skin infestation, such as Demodecidae or Pyemotidae species, play in viral transmission. It seems likely that arthropod-coronavirus interactions may take place through the molecular attraction forces between the chitin found on the exoskeleton of mites commonly found on human skin and the lipids present on the viral envelope of the SARS-CoV-2. We believe this may mean that arthropods are currently an overlooked cofactor in viral infection which may have some important biomedical implications for both prevention and treatment.

Familial clustering of COVID-19 skin manifestations.

The medical community in the past months has seen a flourishing of information related to the SARS-CoV-2 virus responsible for the COVID-19 pandemic. From the early days of the pandemic, the SARS-CoV-2 virus has been linked to multiple different types of skin involvement. To the best of our knowledge, we are the first to report on a case of familial clustering of a maculopapular COVID-19 rash. Eight persons presented COVID-19 symptoms, six were confirmed via SAR-CoV-2 chemoluminescent immunoassays, and the four related by blood presented skin manifestations. Although, it has not been fully established if the SARS-CoV-2 can in fact cause viral exanthems, our observations regarding the familial clustering and the temporal evolution seen in this family seem to present strong evidence of a viral exanthema related to SARS-CoV-2 infection.

New Antifibroblastic Medication in Dermatology: Could Nintedanib Treat Scarring?

There are a wide variety of disfiguring dermatological conditions whose pathologic substrate is represented by the unwanted deposition of collagen from dermal fibroblasts. Pirfenidone has demonstrated efficiency in the treatment of disordered collagen production when applied topically. Due to a similar mechanism of action, we also hypothesize that a similar medication, nintedanib, might have similar applications. We also propose that a liposomal technology may assist in the penetration of nintedanib and enhance its clinical effects.

Interrelationship and Sequencing of Interleukins4, 13, 31, and 33 - An Integrated Systematic Review: Dermatological and Multidisciplinary Perspectives.

The interrelations and sequencing of interleukins are complex (inter)actions where each interleukin can stimulate the secretion of its preceding interleukin. In this paper, we attempt to summarize the currently known roles of IL-4, IL-13, IL-31, and IL-33 from a multi-disciplinary perspective. In order to conduct a comprehensive review of the current literature, a search was conducted using PubMed, Google Scholar, Medscape, UpToDate, and Key Elsevier for keywords. The results were compiled from case reports, case series, letters, and literature review papers, and analyzed by a panel of multi-disciplinary specialist physicians for relevance. Based on 173 results, we compiled the following review of interleukin signaling and its clinical significance across a multitude of medical specialties. Interleukins are at the bed rock of a multitude of pathologies across different organ systems and understanding their role will likely lead to novel treatments and better outcomes for our patients. New interleukins are being described, and the role of this inflammatory cascade is still coming to light. We hope this multi-discipline review on the role interleukins play in current pathology assists in this scope.

A Working Hypothesis on Vesicular Lesions Related to COVID-19 Infection, Koebner Phenomena Type V, and a Short Review of Related Data.

SARS-CoV-2 has recently been associated with the reactivation of varicella zoster virus in patients. This is potentially an observation of a local susceptibility of the skin in areas of vesicle formation. This article explores the dermatologic manifestations that have been linked to the SARS-CoV-2 virus, their infectious risk, as well as potential confounding factors. An isotopic response may be occurring due to the occurrence of an immunocompromised district incited by sustained inflammation mediated by inflammatory cytokines.

Nevi, biologics for psoriasis and the risk for skin cancer: A real concern? (Case presentation and short review).

Psoriasis is a systemic inflammatory cutaneous disease that affects approximately 2% of the world's population. Systemic treatments and biologic treatment therapies are a powerful option for patients with moderate to severe psoriasis. Some studies from the literature indicate an overall small, but increased, risk of neoplasia in patients with psoriasis treated with phototherapy or systemic medication. The relationship between psoriasis and malignancy is not very well established; there are few studies with conflicting results. We present the case of a 31-year-old male patient, diagnosed with psoriasis, who was deemed eligible for systemic therapy. Treatment with methotrexate was initiated, but without a satisfactory outcome. Given the patient's resistant disease involving 15% of his body surface, his desire to have a clear skin, besides his being naïve to biologic therapy, he was proposed to start treatment with secukinumab 300 mg monthly. The patient experienced complete clearance of lesions and was followed-up on the basis of clinical and biological parameters. There are limited data concerning the relationship between melanocytic lesions, psoriasis and melanoma. Immunologic pathways implicated in psoriasis induce a reduction in the number of melanocytic nevi. Nevertheless, little is known concerning the association of melanocytic nevi with psoriasis. Thorough skin examination, meaning clinical and dermoscopic evaluation of melanocytic lesions, must be encouraged in patients treated with systemic therapies such as biologic agents.