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  • Title: Nucleotide-binding oligomerization domain-containing protein 1 (NOD1) in Asian seabass, Lates calcarifer: Cloning, ontogeny and expression analysis following bacterial infection or ligand stimulation.
    Author: Paria A, Makesh M, Chaudhari A, Purushothaman CS, Rajendran KV.
    Journal: Fish Shellfish Immunol; 2018 Aug; 79():153-162. PubMed ID: 29723664.
    Abstract:
    NOD1 (Nucleotide-binding oligomerization domain-containing protein 1) is one of the most prominent intracellular Nod-like receptors (NLRs), responsible for detecting different microbial components and products arising from tissue injury. Here, we have identified and cloned NOD1 transcript in the Asian seabass, Lates calcarifer (AsNOD1), which consists of 3749 nucleotides and encodes for a predicted putative protein of 900 AA. The AsNOD1 possesses the typical structure of NLR family, consisting of N-terminal CARD domain, centrally located NACHT domain and C-terminal LRRs. The AsNOD1 showed ubiquitous tissue expression in 11 different tissues of healthy animals tested with high levels of expression in hindgut and gill. From the ontogenetic expression profile of AsNOD1, it is quite evident that this gene might follow a maternally-transferred trend in euryhaline teleosts, as it is highly abundant in embryonic developmental stages. The constitutive immunomodulation of AsNOD1 in terms of expression level was clearly evident in the different tissues of Asian seabass-injected either with Vibrio alginolyticus or poly I:C. However, injection with Staphylococcus aureus did not elicit similar immunomodulation except for the up-regulation noticed at few time-points in some tissues. SISK-cell line induced with different ligands such as poly I:C, LPS and PGN also showed up-regulation of AsNOD1 in certain time-points in vitro. Based on the results obtained in the present study, it can be inferred that the AsNOD1 might play an immunoregulatory role upon exposure to different bacterial as well as viral PAMPs and also might be an important component of innate immune element during embryonic and larval development in the euryhaline teleost Asian seabass.
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