Lactoferrin is an iron-binding glycoprotein with a molecular weight of about 80 kDa that belongs to the transferrin family. Due to its unique physical and chemical properties, lactoferrin has a variety of biological functions including antibacterial, antiviral, anticancer, immunomodulatory activities and regulation of iron absorption. High-yield production of recombinant lactoferrin with biological activity and its application in clinical treatment have been a hot topic for long time. With the development of genetic engineering techniques, various expression systems have been developed to produce recombinant lactoferrin. In this review, we summarize physicochemical characteristics, biological activities, clinical studies and current recombinant expression systems of lactoferrin, in order to provide references for its clinical application.
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