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Molecular Characterization and Gene Expression Profiling ... - CUSAT

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Chapter 7<br />

� Tissue-wise expression profile was found to be unique for the various<br />

AMP genes studied. All AMPs were found to be constitutively<br />

produced in various tissues of P. monodon. Maximum level of AMP<br />

expression was found in the haemocytes followed by gills, intestine,<br />

heart, muscle <strong>and</strong> hepatopancreas.<br />

� On WSSV challenge a general down-regulation of all the AMP genes<br />

(except ALF) could be observed in the control group of shrimps<br />

� Administration of immunostimulant <strong>and</strong> probiotic incorporated diet<br />

was found to alter the expression of AMP genes<br />

� Even under WSSV challenged conditions, immunostimulant fed<br />

group up-regulated the AMP genes<br />

� Though administration of both marine yeasts <strong>and</strong> beta-glucans up-<br />

regulated the AMP genes, marine yeasts (whole cell) were found to be<br />

better immunostimulant than β-1, 3 glucans<br />

� C. haemulonii S27 yeast - proved to be the best immunostimulant in<br />

terms of AMP gene expression (especially ALF <strong>and</strong> penaeidin-3) <strong>and</strong><br />

post-challenge survival<br />

� Probionts administered individually <strong>and</strong> in combination were found<br />

to alter the expression of AMP genes<br />

� Probiotics supported maximum up-regulation of ALF <strong>and</strong> Penaeidin-3<br />

genes pre-challenge WSSV<br />

� On WSSV challenge, probiotic bacteria was found to support up-<br />

regulation of all AMP genes<br />

<strong>Molecular</strong> <strong>Characterization</strong> <strong>and</strong> <strong>Gene</strong> <strong>Expression</strong> <strong>Profiling</strong> of Antimicrobial Peptides in Penaeid Shrimps<br />

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