Abstract
Antimicrobial peptides (AMP) belong to the innate arm of immunity and serve as critical defence weapons across the living system. They have a multidimensional role in regulation of immunity which includes their direct antimicrobial response, chemoattraction, immune cell recruitment, stimulation of cytokine secretion and even triggering the adaptive immune responses. AMP-mediated regulation is intricate as these molecules keep a check on proinflammatory cytokines to prevent cytotoxicity in host. These host-derived peptides represent a divergent family in fish and have been tailored to initiate the appropriate response for the pathogen profile encountered by the species. The five classes of fish AMPs—piscidins, β-defensins, hepcidins, cathelicidins and histone-derived peptides—have been investigated for their antimicrobial effects against a wide variety of fish pathogens. The aquaculture industry often resorts to vaccines or antibiotics for evading fish disease; however, the therapeutic dosage of vaccines has the risks of cytotoxicity in host, while the latter promotes the already looming threat of antibiotic resistance. Under these circumstances, the exploitation of the broad-spectrum antimicrobial response of AMPs is not only an effective but also a safe means for combatting pathogenic infections in fish. Interestingly, the fish AMPs have also been found to generate effective immune response against various human pathogens and cancer cells, and this area has been extensively studied for its direct application in human health. However, there is a dearth of reports on their field application for amelioration of fish health. This chapter is focussed on fish AMPs, and it highlights their role in nurturing fish health and their potential for development of therapeutics.
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Priyam, M., Bhat, R.A., Kumar, N. (2021). Recent Advances in Antimicrobial Peptides to Improve Fish Health. In: Gupta, S.K., Giri, S.S. (eds) Biotechnological Advances in Aquaculture Health Management . Springer, Singapore. https://doi.org/10.1007/978-981-16-5195-3_8
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