- Tsoi, Lam C;
- Xing, Xianying;
- Xing, Enze;
- Wasikowski, Rachael;
- Shao, Shuai;
- Zeng, Chang;
- Plazyo, Olesya;
- Kirma, Joseph;
- Jiang, Yanyung;
- Billi, Allison C;
- Sarkar, Mrinal K;
- Turnier, Jessica L;
- Uppala, Ranjitha;
- Smith, Kathleen M;
- Helfrich, Yolanda;
- Voorhees, John J;
- Maverakis, Emanual;
- Modlin, Robert L;
- Kahlenberg, J Michelle;
- Scott, Victoria E;
- Gudjonsson, Johann E
Tape stripping is a minimally invasive, nonscarring method that can be utilized to assess gene expression in the skin but is infrequently used given technical constraints. By comparing different tape stripping technologies and full-thickness skin biopsy results of lesional and nonlesional psoriatic skin from the same patients, we demonstrate that tape stripping with optimized high-resolution transcriptomic profiling can be used to effectively assess and characterize inflammatory responses in the skin. Upon comparison with single-cell RNA-sequencing data from psoriatic full-thickness skin biopsies, we illustrate that tape-stripping efficiently captures the transcriptome of the upper layers of the epidermis with sufficient resolution to assess the molecular components of the feed-forward immune amplification pathway in psoriasis. Notably, nonlesional psoriatic skin sampled by tape stripping demonstrates activated, proinflammatory changes when compared to healthy control skin, suggesting a prepsoriatic state, which is not captured on full-thickness skin biopsy transcriptome profiling. This work illustrates an approach to assess inflammatory response in the epidermis by combining noninvasive sampling with high throughput RNA-sequencing, providing a foundation for biomarker discoveries and mechanism of action studies for inflammatory skin conditions.