Lupus, Autoimmune Inflamation & Retroelements - The Gehlhausen Lab at Yale School of Medicine

Why It Matters

Understanding lupus as a virus‑like immune response uncovers upstream targets, enabling development of precise treatments that could reduce disease burden and drug toxicity.

Key Takeaways

• Skin inflammation in lupus mimics viral infection pathways.
• Elevated interferons cause chronic fatigue resembling viral illness.
• Reactivated retroelements constitute half genome, trigger immune response.
• Single-cell RNA sequencing maps lupus disease architecture precisely.
• Targeting upstream signals may yield safer, targeted lupus therapies.

Summary

The Gehlhausen Lab at Yale investigates cutaneous lupus, focusing on how the skin’s immune response becomes chronically activated and fails to shut off, effectively treating the tissue as if it were infected by a virus. Researchers highlight that lupus patients exhibit elevated interferon levels, producing symptoms such as chronic fatigue that mirror viral illness.

Key findings reveal that retroelements—genetic sequences comprising roughly 50% of the human genome—normally remain epigenetically silent but become transcriptionally active in autoimmune settings. This reactivation fools the innate immune system into recognizing self‑DNA as viral, driving both innate and adaptive immune signaling.

The team employs cutting‑edge single‑cell and spatial RNA sequencing to chart cellular interactions within lesions, and they complement these data with patient‑derived in‑vitro assays and genetically engineered mouse models. These platforms allow precise manipulation of candidate pathways to test causality and therapeutic potential.

Ultimately, the work aims to identify upstream drivers of interferon and retroelement activation, paving the way for targeted therapies that could mitigate lupus symptoms while minimizing side effects compared with broad immunosuppression.

Original Description

For more information on Jeff Gehlhausen or #YaleSchoolOfMedicine, visit: https://medicine.yale.edu/profile/jeffrey-gehlhausen and https://medicine.yale.edu/lab/gehlhausen.

The Gehlhausen Lab focuses on the biology of autoimmune inflammatory skin diseases. To accomplish this research, they utilize unique genetic models of autoimmunity, in addition to patient samples from autoimmune skin disease patients. While our work is currently focused on lupus erythematosus, they plan to extend their observations to other relevant skin diseases like dermatomyositis that on some levels appear to have shared molecular and cellular biology. To accomplish these studies, The Gehlhausen Lab regularly employs a mix of both standard and newer technologies including high parameter flow cytometry, bulk RNA sequencing, single cell RNA sequencing, in addition to spatial transcriptomic analyses.

0:00 The Gehlhausen Lab

0:33 What are they studying?

1:41 How are they studying it?

2:29 Where might this research lead?