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  • Title: Microbial genetic engineering approach to replace shark livering for squalene.
    Author: Patel A, Bettiga M, Rova U, Christakopoulos P, Matsakas L.
    Journal: Trends Biotechnol; 2022 Oct; 40(10):1261-1273. PubMed ID: 35450778.
    Abstract:
    Squalene is generally sourced from the liver oil of deep sea sharks (Squalus spp.), in which it accounts for 40-70% of liver mass. To meet the growing demand for squalene because of its beneficial effects for human health, three to six million deep sea sharks are slaughtered each year, profoundly endangering marine ecosystems. To overcome this unsustainable practice, microbial sources of squalene might offer a viable alternative to plant- or animal-based squalene, although only a few microorganisms have been found that are capable of synthesizing up to 30% squalene of dry biomass by native biosynthetic pathways. These squalene biosynthetic pathways, on the other hand, can be genetically manipulated to transform microorganisms into 'cellular factories' for squalene overproduction.
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