PMID- 21863333 OWN - NLM STAT- MEDLINE DCOM- 20120917 LR - 20211020 IS - 1573-5168 (Electronic) IS - 0920-1742 (Linking) VI - 38 IP - 3 DP - 2012 Jun TI - Effects of low environmental salinity on the cellular profiles and expression of Na+, K+-ATPase and Na+, K+, 2Cl- cotransporter 1 of branchial mitochondrion-rich cells in the juvenile marine fish Monodactylus argenteus. PG - 665-78 LID - 10.1007/s10695-011-9549-1 [doi] AB - The goal of this study was to determine the osmoregulatory ability of a juvenile marine fish, silver moony (Monodactylus argenteus), for the purpose of developing a new experimental species for ecophysiological research. In this study, M. argenteus was acclimated to freshwater (FW), brackish water (BW), or seawater (SW). The salinity tolerance of this euryhaline species was effective, and the fish survived well upon osmotic challenges. The largest apical surface of mitochondrion-rich cells was found in the FW individuals. Immunohistochemical staining revealed that Na(+), K(+)-ATPase immunoreactive (NKA-IR) cells were distributed in the interlamellar region of the gill filaments of the silver moony in all experimental groups. In addition to the filaments, NKA-IR cells were also found in the lamellae of the FW individuals. The number of NKA-IR cells in the gills of the FW individuals exceeded that of the BW and SW individuals. The NKA-IR cells of FW and SW individuals exhibited bigger size than that of BW fish. The NKA activities and protein expression of the NKA alpha-subunit in the gills of the FW individuals were significantly higher than in the BW and SW groups. Additionally, the relative amounts of Na(+), K(+), 2Cl(-) cotransporter 1 (NKCC1) were salinity-dependent in the gills. Immunofluorescent signals of NKCC1 were localized to the basolateral membrane of NKA-IR cells in all groups. In the gills of the FW individuals, however, some NKA-IR cells did not exhibit a basolateral NKCC1 signal. In conclusion, the present study illustrated the osmoregulatory mechanisms of this easy- and economic-to-rear marine teleost with euryhaline capacity and proved the silver moony to be a good experimental animal. FAU - Kang, Chao-Kai AU - Kang CK AD - Department of Life Sciences, National Chung Hsing University, Taichung 402, Taiwan. FAU - Liu, Fu-Chen AU - Liu FC FAU - Chang, Wen-Been AU - Chang WB FAU - Lee, Tsung-Han AU - Lee TH LA - eng GR - N01-HD-62915/HD/NICHD NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20110824 PL - Netherlands TA - Fish Physiol Biochem JT - Fish physiology and biochemistry JID - 100955049 RN - 0 (Sodium-Potassium-Chloride Symporters) RN - 0 (Solute Carrier Family 12, Member 2) RN - EC 7.2.2.13 (Sodium-Potassium-Exchanging ATPase) SB - IM MH - Acclimatization/physiology MH - Animals MH - Branchial Region/metabolism/ultrastructure MH - Fresh Water/analysis MH - Gills/metabolism/ultrastructure MH - Immunohistochemistry MH - Microscopy, Electron, Scanning MH - Mitochondria/metabolism MH - Perciformes/anatomy & histology/*metabolism MH - Salinity MH - Seawater/analysis MH - Sodium-Potassium-Chloride Symporters/*metabolism MH - Sodium-Potassium-Exchanging ATPase/*metabolism MH - Solute Carrier Family 12, Member 2 MH - Water-Electrolyte Balance/physiology EDAT- 2011/08/25 06:00 MHDA- 2012/09/18 06:00 CRDT- 2011/08/25 06:00 PHST- 2011/02/09 00:00 [received] PHST- 2011/08/06 00:00 [accepted] PHST- 2011/08/25 06:00 [entrez] PHST- 2011/08/25 06:00 [pubmed] PHST- 2012/09/18 06:00 [medline] AID - 10.1007/s10695-011-9549-1 [doi] PST - ppublish SO - Fish Physiol Biochem. 2012 Jun;38(3):665-78. doi: 10.1007/s10695-011-9549-1. Epub 2011 Aug 24.