PMID- 22766099 OWN - NLM STAT- MEDLINE DCOM- 20121211 LR - 20120914 IS - 1879-0089 (Electronic) IS - 0145-305X (Linking) VI - 38 IP - 2 DP - 2012 Oct TI - The ontogeny of New Zealand groper (Polyprion oxygeneios) lymphoid organs and IgM. PG - 215-23 LID - S0145-305X(12)00135-8 [pii] LID - 10.1016/j.dci.2012.06.007 [doi] AB - This study investigates the ontogeny of New Zealand groper (Polyprion oxygeneios) immune system, a new species for aquaculture in the Southern Pacific Ocean. In the eggs, both lysozyme and IgM were detected. Egg IgM was found at 1.07-1.56 mug/g wet weight and consisted of monomers compared to the polymerized IgM found in adult serum. In larvae, the head-kidney (HK) was first observed at 6 dph, followed by the spleen at 16 dph, and thymus at 20 dph, and within these organs IgM(+) cells were first detected in the HK (12 dph), then the spleen (32 dph) and finally in the thymus and the gastrointestinal tract (45 dph). Low levels of Igmu heavy chain transcripts were detected at 2 and 3 dph and they increased at 9 dph. Igmu expression further increased from day 45 onwards. In juveniles (115 dph), the HK and blood showed similar percentages of IgM(+) cells as the adult groper. These results highlight the important maturation steps that occur during the development of the immune system in the marine teleost P. oxygeneios. CI - Copyright (c) 2012 Elsevier Ltd. All rights reserved. FAU - Parker, S AU - Parker S AD - School of Biological Sciences, Victoria University of Wellington, Wellington, New Zealand. FAU - La Flamme, A AU - La Flamme A FAU - Salinas, I AU - Salinas I LA - eng PT - Journal Article DEP - 20120702 PL - United States TA - Dev Comp Immunol JT - Developmental and comparative immunology JID - 7708205 RN - 0 (Immunoglobulin M) RN - EC 3.2.1.17 (Muramidase) SB - IM MH - Animals MH - Head Kidney/cytology/embryology MH - Immunoglobulin M/analysis/immunology MH - Lymphoid Tissue/cytology/*embryology MH - Muramidase/analysis/metabolism MH - Perciformes/*embryology/*immunology EDAT- 2012/07/07 06:00 MHDA- 2012/12/12 06:00 CRDT- 2012/07/07 06:00 PHST- 2011/11/27 00:00 [received] PHST- 2012/06/18 00:00 [revised] PHST- 2012/06/23 00:00 [accepted] PHST- 2012/07/07 06:00 [entrez] PHST- 2012/07/07 06:00 [pubmed] PHST- 2012/12/12 06:00 [medline] AID - S0145-305X(12)00135-8 [pii] AID - 10.1016/j.dci.2012.06.007 [doi] PST - ppublish SO - Dev Comp Immunol. 2012 Oct;38(2):215-23. doi: 10.1016/j.dci.2012.06.007. Epub 2012 Jul 2.