Structure of Antennal Gland in Kuruma Prawn Penaeus japonicus.

Nakamura, Kaworu; Nishigaki, Youichi

doi:10.2331/suisan.57.1859

Cited by 4 publications

(1 citation statement)

References 2 publications

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“…The organismic change at the Cs would result in a considerable reduction in the filtration area proportionally affecting the filtration rate (Norfolk 1978;Norfolk & Craik 1980). Changes in the labyrinth, which is analogous to the convoluted tubules of the kidney (Khodabandeh et al 2005a;Nakamura & Nishigaki 1991;Mantel & Farmer 1983), would directly affect ion flux regulation. In fact, destruction of mitochondrial structures in the labyrinth epithelial cells, including swelling and/or loss of their cristae, was also evident indicating disturbances of active transport of ion fluxes within these renal tubule-like cells.…”

Section: Discussionmentioning

confidence: 99%

Salinity tolerance of cross-breed shrimp families: morphological and biochemical approaches

et al. 2013

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Marine invertebrates respond to fluctuations in their environment throughout development and growth. Homeostatic adaptation is mediated in part through the regulation of Na+‐K+ ATPase enzymes and members of this class of enzymes are localized to the antennal gland of many crustaceans. In this study, we investigated the morphological and biochemical changes of the antennal glands in eight families of cross‐breed post‐larval shrimp subjected to hypotonic (10 ppt) and isotonic (20 ppt) conditions. The greatest changes in the antennal glands were detected in the hypotonic condition with families two and five cross‐breed shrimp exhibiting the highest tolerance to this diluted salinity. The changes detected in hypotonic tolerant shrimp included enlargement of coelomosac and labyrinth spaces, the presence of many dense cytoplasmic globules in podocytes as well as highly wavy apical architecture of labyrinth cells. Several alterations were also observed at the subcellular level such as widening of the intercellular spaces between podocytes, organelle destruction, and decreased basal membrane in‐folding in labyrinth cells. In addition, shrimp exposed to hypotonic conditions displayed decreased expression of both α and β subunits of Na+‐K+ ATPase and decreased enzymatic activity. The changes observed in animals upon exposure to hypotonic stress are discussed.

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Section: Discussionmentioning

confidence: 99%

Salinity tolerance of cross-breed shrimp families: morphological and biochemical approaches

et al. 2013

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A structure–function analysis of ion transport in crustacean gills and excretory organs

Freire

Onken

McNamara

2008

Comparative Biochemistry and Physiology Part A: Molecular &

357

324

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The shrimp nephrocomplex serves as a major portal of pathogen entry and is involved in the molting process

Gryse

Khuong

Descamps

et al. 2020

Proc. Natl. Acad. Sci. U.S.A.

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Viruses, such as white spot syndrome virus, and bacteria, such as Vibrio species, wreak havoc in shrimp aquaculture [C. M. Escobedo-Bonilla et al., J. Fish. Dis. 31, 1–18 (2008)]. As the main portal of entry for shrimp-related pathogens remain unclear, infectious diseases are difficult to prevent and control. Because the cuticle is a strong pathogen barrier, regions lacking cuticular lining, such as the shrimp’s excretory organ, “the antennal gland,” are major candidate entry portals [M. Corteel et al., Vet. Microbiol. 137, 209–216 (2009)]. The antennal gland, up until now morphologically underexplored, is studied using several imaging techniques. Using histology-based three-dimensional technology, we demonstrate that the antennal gland resembles a kidney, connected to a urinary bladder with a nephropore (exit opening) and a complex of diverticula, spread throughout the cephalothorax. Micromagnetic resonance imaging of live shrimp not only confirms the histology-based model, but also indicates that the filling of the diverticula is linked to the molting cycle and possibly involved therein. Based on function and complexity, we propose to rename the antennal gland as the “nephrocomplex.” By an intrabladder inoculation, we showed high susceptibility of this nephrocomplex to both white spot syndrome virus and Vibrio infection compared to peroral inoculation. An induced drop in salinity allowed the virus to enter the nephrocomplex in a natural way and caused a general infection followed by death; fluorescent beads were used to demonstrate that particles may indeed enter through the nephropore. These findings pave the way for oriented disease control in shrimp.

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Structure of Antennal Gland in Kuruma Prawn Penaeus japonicus.

Cited by 4 publications

References 2 publications

Salinity tolerance of cross-breed shrimp families: morphological and biochemical approaches

Salinity tolerance of cross-breed shrimp families: morphological and biochemical approaches

A structure–function analysis of ion transport in crustacean gills and excretory organs

The shrimp nephrocomplex serves as a major portal of pathogen entry and is involved in the molting process

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