Tissue Barriers is an academic journal dedicated to tissue barrier research, aimed at promoting and disseminating the latest advances in various tissue barriers within living organisms, including physiology, pathology, pharmacology, immunology, and other fields. These organizational barriers play an important role in maintaining the normal functions of organisms, preventing the occurrence and development of diseases, and drug delivery. The magazine covers various types of tissue barriers, such as blood-brain barrier, blood retinal barrier, blood testis barrier, placental barrier, intestinal barrier, etc. These barriers form a line of defense within the organism, protecting important organs and tissues from harmful substances from the outside world, while also providing pathways for the delivery of nutrients and drugs. Studying the structure and function of these barriers can help us better understand the physiological processes of organisms and provide new ideas for disease prevention and treatment.