Characterization of a hemocyte homeostasis-associated-like protein (HHAP) in the freshwater crayfish Pacifastacus leniusculus
2016 (English)In: Fish and Shellfish Immunology, ISSN 1050-4648, E-ISSN 1095-9947, Vol. 58, 429-435 p.Article in journal (Refereed) Published
Hemocyte homeostasis-associated-like protein (HHAP) in the freshwater crayfish Pacifastacus leniusculus has a distinct role from that of its homolog PmHHAP in the shrimp Penaeus monodon. Knockdown of PIHHAP in vitro using double-stranded RNA (dsRNA) had no effect on the cell morphology of hematopoietic tissue (HPT) cells. The total hemocyte number and caspase activity were unchanged after PIHHAP knockdown in vivo, in contrast to the results found in shrimp. Moreover, suppression of PIHHAP both in vitro and in vivo did not change the mRNA levels of some genes involved in hematopoiesis and hemocyte homeostasis. Interestingly, bacterial count and scanning electron microscope revealed that depletion of PIHHAP in intestine by RNAi resulted in higher number of bacteria in the crayfish intestine. Together, these results suggest that PIHHAP is not involved in hemocyte homeostasis in the crayfish P. leniusculus but appears to affect the bacterial number in the intestine through an unknown mechanism. Since PIHHAP has different functions from PmHHAP, we therefore named it HHAP-like protein.
Place, publisher, year, edition, pages
2016. Vol. 58, 429-435 p.
Pacifastacus leniusculus, Hemocyte homeostasis, RNA interference, Intestine, Aeromonas hydrophila
IdentifiersURN: urn:nbn:se:uu:diva-309995DOI: 10.1016/j.fsi.2016.09.038ISI: 000387523100051PubMedID: 27663854OAI: oai:DiVA.org:uu-309995DiVA: diva2:1055438
FunderSwedish Research Council, 2012-2418