PMID- 27498801 OWN - NLM STAT- MEDLINE DCOM- 20170127 LR - 20191210 IS - 0289-0003 (Print) IS - 0289-0003 (Linking) VI - 33 IP - 4 DP - 2016 Aug TI - A Stenohaline Medaka, Oryzias woworae, Increases Expression of Gill Na(+), K(+)-ATPase and Na(+), K(+), 2Cl(-) Cotransporter 1 to Tolerate Osmotic Stress. PG - 414-25 LID - 10.2108/zs150157 [doi] AB - The present study aimed to evaluate the osmoregulatory mechanism of Daisy's medaka, O. woworae,as well as demonstrate the major factors affecting the hypo-osmoregulatory characteristics of euryhaline and stenohaline medaka. The medaka phylogenetic tree indicates that Daisy's medaka belongs to the celebensis species group. The salinity tolerance of Daisy's medaka was assessed. Our findings revealed that 20 per thousand (hypertonic) saltwater (SW) was lethal to Daisy's medaka. However, 62.5% of individuals survived 10 per thousand (isotonic) SW with pre-acclimation to 5 per thousand SW for one week. This transfer regime, "Experimental (Exp.) 10 per thousand SW", was used in the following experiments. After 10 per thousand SW-transfer, the plasma osmolality of Daisy's medaka significantly increased. The protein abundance and distribution of branchial Na(+), K(+)-ATPase (NKA) and Na(+), K(+), 2Cl(-) cotransporter 1 (NKCC1) were also examined after transfer to 10 per thousand SW for one week. Gill NKA activity increased significantly after transfer to 10 per thousand SW. Meanwhile, elevation of gill NKA alphaalpha-subunit protein-abundance was found in the 10 per thousand SW-acclimated fish. In gill cross-sections, more and larger NKA-immunoreactive (NKA-IR) cells were observed in the Exp. 10 per thousand SW medaka. The relative abundance of branchial NKCC1 protein increased significantly after transfer to 10 per thousand SW. NKCC1 was distributed in the basolateral membrane of NKA-IR cells of the Exp. 10 per thousand SW group. Furthermore, a higher abundance of NKCC1 protein was found in the gill homogenates of the euryhaline medaka, O. dancena, than in that of the stenohaline medaka, O. woworae. FAU - Juo, Jiun-Jang AU - Juo JJ AD - 1 Department of Life Sciences, National Chung Hsing University, Taichung 402, Taiwan. AD - dagger JJJ, CKK, and WKY contributed equally to this paper. FAU - Kang, Chao-Kai AU - Kang CK AD - 2 Tainan Hydraulics Laboratory, National Cheng Kung University, Tainan 709, Taiwan. AD - dagger JJJ, CKK, and WKY contributed equally to this paper. FAU - Yang, Wen-Kai AU - Yang WK AD - 1 Department of Life Sciences, National Chung Hsing University, Taichung 402, Taiwan. AD - dagger JJJ, CKK, and WKY contributed equally to this paper. FAU - Yang, Shu-Yuan AU - Yang SY AD - 1 Department of Life Sciences, National Chung Hsing University, Taichung 402, Taiwan. FAU - Lee, Tsung-Han AU - Lee TH AD - 1 Department of Life Sciences, National Chung Hsing University, Taichung 402, Taiwan. AD - 3 Department of Biological Science and Technology, China Medical University,Taichung 404, Taiwan. LA - eng PT - Journal Article PL - Japan TA - Zoolog Sci JT - Zoological science JID - 8702287 RN - 0 (Sodium-Potassium-Chloride Symporters) RN - 059QF0KO0R (Water) RN - EC 7.2.2.13 (Sodium-Potassium-Exchanging ATPase) SB - IM MH - Adaptation, Physiological/genetics/physiology MH - Animals MH - Gene Expression Regulation, Enzymologic MH - Gills/*enzymology MH - Oryzias/classification/*metabolism MH - Osmotic Pressure/*physiology MH - Phylogeny MH - Salinity MH - Sodium-Potassium-Chloride Symporters/genetics/*metabolism MH - Sodium-Potassium-Exchanging ATPase/genetics/*metabolism MH - Species Specificity MH - Water/chemistry OTO - NOTNLM OT - 2Cl- cotransporter 1 OT - K+ OT - K+-ATPase OT - Na+ OT - Oryzias woworae OT - gill OT - osmotic stress OT - stenohaline EDAT- 2016/08/09 06:00 MHDA- 2017/01/28 06:00 CRDT- 2016/08/09 06:00 PHST- 2016/08/09 06:00 [entrez] PHST- 2016/08/09 06:00 [pubmed] PHST- 2017/01/28 06:00 [medline] AID - 10.2108/zs150157 [doi] PST - ppublish SO - Zoolog Sci. 2016 Aug;33(4):414-25. doi: 10.2108/zs150157.