It is primarily responsible for capturing and tethering leukocytes, particularly neutrophils and some other types of white blood cells, to the endothelium at sites of inflammation.

Source: https://seekingalpha.com/article/4631684-apollomics-a-taiwanese-origin-company-with-late-stage-pipeline?source=feed_all_articles

Xiidra is small molecule that binds to LFA-1, a protein on the surface of immune cells called leukocytes.

Source: https://medcitynews.com/2023/06/bausch-lomb-acquisition-dry-eye-disease-novartis/