In a 2009 paper in the American Journal of Psychology, Revonsuo and a co-writer, Katja Valli, theorized that "modern humans still possess this ancient defense mechanism," though it probably no longer fulfills its original biological function, since the modern environment is so different from the one in which the system evolved.
Cationic antimicrobial peptides (CAMPs) are important elements of innate immunity in higher organisms, representing an ancient defense mechanism against pathogenic bacteria.
The last quarter of the Mozi preserves the texts of these militias, which present detailed information about ancient defense tactics and siege fortifications (for an overview, see Yates, 1980).
With CRISPR, a method based on the ancient defense mechanism that bacteria use to demolish the DNA of invading viruses, researchers can target a specific point in a genome with a short strand of guide RNA and then slice it with an enzyme to precisely disrupt a gene or insert a new one.
As an evolutionarily conserved and ancient defense strategy, the innate immune system responds instantaneously to invading pathogens in a non-specific manner.
Complement, as an ancient defense system, can be traced from the coral and sea anemone, members of the protostome Cnidaria [16], [17], and is widely present in the invertebrates including horseshoe crab [18], sea urchin [19] and sea squirt [20].
Phagocytosis is the most ancient defense mechanism against microbes.
Innate immunity is the ancient defense system of multicellular organisms against microbial infection.
Antimicrobial peptides (AMPs) are ancient defense molecules of the innate immune system that has gained substantial attention over recent years [ 4, 7].
AMPs belong to an ancient defense system found in all organisms and participated in a preservative co-evolution with a complex microbiome.
