Complex sentence: In 1986 he and his colleagues described the direct inflammatory activity of tumor necrosis factor-alpha (TNF), and a year later he reported that monoclonal antibodies against TNF can be used therapeutically to prevent inflammation and tissue injury.
Split into simpler sentences: In 1986 he and his colleagues described the direct inflammatory activity of tumor necrosis factor-alpha (TNF). The following year later he reported that monoclonal antibodies against TNF can be used therapeutically to prevent inflammation and tissue injury.