Hu, Marian Y; Sucre, Elliott; Charmantier-Daures, Mireille; Charmantier, Guy; Lucassen, Magnus; Himmerkus, Nina; Melzner, Frank (2015): Localization of ion-regulatory epithelia in embryos and hatchlings of two cephalopods. doi:10.1594/PANGAEA.842790, Supplement to: Hu, MY et al. (2010): Localization of ion-regulatory epithelia in embryos and hatchlings of two cephalopods. Cell and Tissue Research, 339(3), 571-583, doi:10.1007/s00441-009-0921-8
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The tissue distribution and ontogeny of Na+/K+-ATPase has been examined as an indicator for ion-regulatory epithelia in whole animal sections of embryos and hatchlings of two cephalopod species: the squid Loligo vulgaris and the cuttlefish Sepia officinalis. This is the first report of the immunohistochemical localization of cephalopod Na+/K+-ATPase with the polyclonal antibody alpha (H-300) raised against the human alpha1-subunit of Na+/K+-ATPase. Na+/K+-ATPase immunoreactivity was observed in several tissues (gills, pancreatic appendages, nerves), exclusively located in baso-lateral membranes lining blood sinuses. Furthermore, large single cells in the gill of adult L. vulgaris specimens closely resembled Na+/K+-ATPase-rich cells described in fish. Immunohistochemical observations indicated that the amount and distribution of Na+/K+-ATPase in late cuttlefish embryos was similar to that found in juvenile and adult stages. The ion-regulatory epithelia (e.g., gills, excretory organs) of the squid embryos and paralarvae exhibited less differentiation than adults. Na+/K+-ATPase activities for whole animals were higher in hatchlings of S. officinalis (157.0 ± 32.4 µmol/g FM/h) than in those of L. vulgaris (31.8 ± 3.3 µmol/g FM/h). S. officinalis gills and pancreatic appendages achieved activities of 94.8 ± 18.5 and 421.8 ± 102.3 µmol ATP/g FM/h, respectively. High concentrations of Na+/K+-ATPase in late cephalopod embryos might be important in coping with the challenging abiotic conditions (low pH, high pCO2) that these organisms encounter inside their eggs. Our results also suggest a higher sensitivity of squid vs. cuttlefish embryos to environmental acid-base disturbances.
|#||Name||Short Name||Unit||Principal Investigator||Method||Comment|
|1||Species||Species||Hu, Marian Y|
|2||Type||Type||Hu, Marian Y|
|3||Replicates||Repl||#||Hu, Marian Y|
|4||Sodium/Potassium adenosine triphosphatase activity||Na/K-ATPase act||µmol/g/h||Hu, Marian Y|
|5||Standard deviation||Std dev||±||Hu, Marian Y||Na/K-ATPase|
|6||Adenosine triphosphatase activity||ATPase act||µmol/g/h||Hu, Marian Y||other ATPases|
|7||Standard deviation||Std dev||±||Hu, Marian Y||other ATPases|
|8||Adenosine triphosphatase activity||ATPase act||µmol/g/h||Hu, Marian Y||total ATPase|
|9||Standard deviation||Std dev||±||Hu, Marian Y||total ATPase|
|10||Change in Sodium/potassium ATPase alpha subunit expression||NaK-ATPase||%||Hu, Marian Y|
40 data points