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The paranuclear dot in Merkel cell carcinoma, how does it form and what does it do?
Background and aims: Staining for Cytokeratin 20 (CK20) and other intermediate filaments in a paranuclear dot pattern is a histological feature used to diagnose the neuroendocrine skin cancer Merkel cell carcinoma (MCC). The functional significance of these paranuclear protein aggregates is unknown. Therefore, we sought to investigate the structure and function of the paranuclear dot in MCC. Methods: In native tumors and MCC cell lines we used: immunostaning, microscopy, chemical inhibition, siRNA knockdown, and cell death modulators to study the paranuclear dot.
Source: Journal of Investigative Dermatology - September 21, 2022 Category: Dermatology Authors: Natasha T. Hill, Loren Collado, Tyler Kellenberger, Kunio Nagashima, Serena Vilasi, Paul W. Harms, Isaac Brownell Source Type: research

Safety and Efficacy of TGF- β1/COX-2 Silencing Therapeutic in Adults With Cutaneous Squamous Cell Carcinoma In Situ
J Drugs Dermatol. 2022 May 1;21(5):472-477. doi: 10.36849/JDD.6384.ABSTRACTThis single-center, open label, dose escalation cohort study evaluated the safety and efficacy of various doses of intralesional injections of TGF-β1/COX-2 combined with histidine-lysine polypeptide (siRNA/HKP) nanoparticle silencing therapeutic in patients with cutaneous in situ squamous cell carcinoma. Twenty-five patients (mean age: 67, SD: 10 years; 52% men) with cutaneous in situ squamous cell carcinoma participated. TGF-β1/COX-2 siRNA/HKP nanoparticle therapeutic was injected weekly for up to 6 weeks based on the following do...
Source: Journal of Drugs in Dermatology - May 9, 2022 Category: Dermatology Authors: Mark Nestor Brian Berman Patrick Lu Michael Molyneaux Source Type: research

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