At the conference in Berlin he was talking about fibronectin.
I did not understand much about his talk but it seems that both plasma fibronectin as well as celullar fibronectin is increased in ME/CFS.
I attached the relevant slides. Sry for the bad quality.
Here's what chatGPT gives me on fibronectin:
Fibronectin is a glycoprotein that plays a critical role in cellular adhesion and the organization of the extracellular matrix. It is found in many tissues and body fluids, including blood, and is involved in a variety of biological processes such as wound healing, embryonic development, and tissue repair. Fibronectin is produced by cells such as fibroblasts, endothelial cells, and platelets, and is composed of repeating structural domains called type I, II, and III modules. It interacts with other extracellular matrix proteins and cell surface receptors to mediate cell adhesion, migration, and signaling. Dysfunction in fibronectin can lead to various diseases and disorders, including cancer, cardiovascular disease, and fibrosis.