Local hormones are a large group of signaling molecules that do not circulate within the blood.[1] Local hormones are produced by cells and bind to either neighboring cells or the same type of cell that produced them.

Eicosanoids (ī′kō-să-noydz; eicosa = twenty, eidos = formed) are a primary type of local hormone.[1] These local hormones are formed by a chain of 20 amino acids and fatty acids from phospholipids in the cell membrane.[1] Eicosanoids initiate either autocrine stimulation or paracrine stimulation.

Prostaglandins are the most diverse category of eicosanoids and are thought to be synthesized in most tissues of the body.[1] This type of local hormone stimulates pain receptors and increases the inflammatory response.[1] Nonsteroidal anti-inflammatory drugs stop the formation of prostaglandins, thus inhibiting these responses.

Textbooks

  1. ^ a b c d e McKinley, Michael P., et al. Anatomy & Physiology: an Integrative Approach. McGraw-Hill Higher Education, 2012