Changes in cell type composition and enzymatic activities in the hepatopancreas of Marsupenaeus japonicus during the moulting cycle

The goal of the present study was to evaluate the changes in the cell type composition and ATPase activities (total ATPase, ouabain-sensitive Na+/K(+)-ATPase, furosemide-sensitive Na(+)-ATPase) that occur during the different stages of the moulting cycle in the hepatopancreas of the Marsupenaeus jap...

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Bibliographic Details
Published in:Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology Biochemical, systemic, and environmental physiology, 2003-06, Vol.173 (4), p.355-363
Main Authors: Zilli, L, Schiavone, R, Scordella, G, Zonno, V, Verri, T, Storelli, C, Vilella, S
Format: Article
Language:English
Subjects:
Adenosine Triphosphatases - metabolism
Animals
Cell Count
Cells
Decapoda (Crustacea) - physiology
Enzymatic activity
Fasting - physiology
Female
Hepatopancreas - cytology
Hepatopancreas - enzymology
Islets of Langerhans - cytology
Male
Marine
Molting - physiology
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Summary:The goal of the present study was to evaluate the changes in the cell type composition and ATPase activities (total ATPase, ouabain-sensitive Na+/K(+)-ATPase, furosemide-sensitive Na(+)-ATPase) that occur during the different stages of the moulting cycle in the hepatopancreas of the Marsupenaeus japonicus. The results clearly suggest that the number of resorptive and fibrillar cell types changes significantly during the different stages. An inverse correlation between resorptive and fibrillar cells is observed during moulting (both in normally fed and fasted animals). Fasting, but not the moulting cycle, affects the number of blister-like cells. In the resorptive cells the enzymatic activities (total ATPases and ouabain-sensitive Na+/K(+)-ATPase) also change during the moulting in a cyclical manner. All these results are in agreement with and confirm the different functions carried out by the two cell types within the hepatopancreas.
ISSN:0174-1578
1432-136X
DOI:10.1007/s00360-003-0348-6