Spatiotemporal single-cell roadmap of human skin wound healing.

Wound healing is vital for human health, yet the details of cellular dynamics and coordination in human wound repair remain largely unexplored. To address this, we conducted single-cell multi-omics analyses on human skin wound tissues through inflammation, proliferation, and remodeling phases of wound repair from the same individuals, monitoring the cellular and molecular dynamics of human skin wound healing at an unprecedented spatiotemporal resolution. This singular roadmap reveals the cellular architecture of the wound margin and identifies FOSL1 as a critical driver of re-epithelialization.

Cutaneous T cell lymphoma atlas reveals malignant T2 cells supported by a B cell-rich tumor microenvironment.

Cutaneous T cell lymphoma (CTCL) is a potentially fatal clonal malignancy of T cells primarily affecting the skin. The most common form of CTCL, mycosis fungoides, can be difficult to diagnose, resulting in treatment delay. We performed single-cell and spatial transcriptomics analysis of skin from patients with mycosis fungoides-type CTCL and an integrated comparative analysis with human skin cell atlas datasets from healthy and inflamed skin.

Toxic epidermal necrolysis occurring with immune checkpoint inhibitors.

Nivolumab and ipilimumab are immune checkpoint inhibitors (ICIs) used in the management of advanced malignancies including malignant melanoma. Although several cutaneous adverse events have been reported with these immunotherapy agents, toxic epidermal necrolysis (TEN) secondary to ICIs is rare. We report a 67-year-old man with TEN occurring during nivolumab and ipilimumab co-therapy and review published cases to highlight the challenges in recognizing and managing these patients.