... of metals in the hepatopancreas of the shrimp, Penaeus semisulcatus de Haan (Crustacea. Decapoda) during the moult cycle . In Marine Environmental Pollution (ed. Halwagy R. , Clayton D. , Behbehani M. ), pp. 195 - 209 . Kuwait : Kuwait University Press . Al-Mohanna S. Y...

.... The majority of the genes were downregulated, presumably by an energetic shift of the hepatopancreas prior to ecdysis. The effect of 20-hydroxyecdysone on representative genes from this group was confirmed in vitro using a hepatopancreas tissue culture. This approach for ecdysteroid-responsive gene...

... in hepatopancreas, expression in gill was 10-fold greater and expression was highest in antennal gland (15-fold greater than in hepatopancreas). Compared with baseline expression levels in intermolt stage,expression of ECaC in antennal gland increased 7.4- and 23.8-fold,respectively, in pre- and postmolt stages...

... membrane Na + /K + -ATPase is a potentially key target for regulation during estivation. Na + /K + -ATPase was investigated in foot muscle and hepatopancreas of the land snail Otala lactea , comparing active and estivating states. In both tissues enzyme properties changed significantly during estivation...

... was recorded for Buthidae following severe desiccation. When desiccated, scorpions lose water primarily from the hepatopancreas, while haemolymph volume is more tightly regulated. However,the haemolymph volume of Scorpionidae decreases as a result of depletion of hepatopancreas water stores following severe...

...George A. Gerencser; Frank Robbins; Jianliang Zhang; Gregory A. Ahearn SUMMARY The transport of [ 14 C]oxalate (Ox 2– ) by epithelial brush-border membrane vesicles (BBMV) of lobster ( Homarus americanus ) hepatopancreas, formed by a magnesium precipitation technique, was stimulated by an outward...

...Pamela Chavez-Crooker; Nestor Garrido; Gregory A. Ahearn SUMMARY Mechanisms of copper transport into purified mitochondrial suspensions prepared from the hepatopancreas of the Atlantic lobster Homarus americanus were investigated. Mitochondria were purified by combining methods of differential...

...P. Chavez-Crooker; N. Garrido; G. A. Ahearn ABSTRACT The hepatopancreas of the American lobster ( Homarus americanus ) possesses four types of epithelial cells arranged along blind-ended tubules. At the distal tips of these tubules, stem cells termed E-cells differentiate into three other cell...

...T. Bishop; M. D. Brand ABSTRACT Cells isolated from the hepatopancreas of the land snail Helix aspersa strongly depress respiration both immediately in response to lowered (oxygen conformation) and, in the longer term, during aestivation. These phenomena were analysed by dividing cellular...

...Mahealani K. Monteilh-Zoller; Vincenzo Zonno; Carlo Storelli; Gregory A. Ahearn ABSTRACT Epithelial brush-border membrane vesicles (BBMVs) from the hepatopancreas of the lobster Homarus americanus were prepared using a magnesium precipitation technique and employed in transport experiments designed...

...Fabrice Durand; Fabienne Chausson; Michèle Regnault ABSTRACT Carcinus maenas and Necora puber were exposed to air for 72 h and 18 h, respectively, at 18 °C. Changes in the free amino acid (FAA) content of their muscle, hepatopancreas and haemolymph were recorded during air-exposure and subsequent...

... membrane BLMV Ca 2+ /Na + antiporter Ca 2+ -ATPase vanadate antiporter hepatopancreas lobster Homarus americanus Animal studies, largely with vertebrate species, suggest that epithelial Ca 2+ absorption occurs via both an active and a passive pathway ( Bronner et al . 1986 ; Favus...

... Ahearn , G. A. and Clay , L. P. ( 1989 ). Kinetic analysis of electrogenic 2 Na + /1 H + antiport in crustacean hepatopancreas . Am. J. Physiol. 257 , R484 – R493 . Ahearn , G. A. and Franco , P. ( 1990 ). Sodium and calcium share the electrogenic 2 Na + /1 H + antiport...

...M. Thamotharan; G. A. Ahearn ABSTRACT Epithelial brush-border membrane vesicles (BBMVs) of lobster ( Homarus americanus ) hepatopancreas were formed by a Mg 2+ precipitation technique. In these BBMVs, [ 14 C]glycylsarcosine ([ 14 C]Gly-Sar) uptake was stimulated by a transmembrane proton gradient...

... verapamil hepatopancreas pyloric ceca Homarus americanus Pycnopodia helianthoides. A wide variety of epithelial and nonepithelial vertebrate cell types possess a Na + /H + exchange protein in their plasma membranes that catalyzes the net uptake of extracellular sodium coupled to the net...

... americanus lobster hepatopancreas antennal glands gills Na + /H + exchange has been studied extensively in vertebrates over several decades, as it is believed to be involved in the regulation of intracellular pH and cell volume and in the transcellular transport of Na + and HCO 3 − ( Murer...

...Teva Siu; Gregory A. Ahearn ABSTRACT The mechanism of [ 3 H]myo-inositol transport by the lobster hepatopancreas was examined using purified brush-border membrane vesicles. Transport was stimulated by a 100 mmol 1 −1 inward Na + gradient, but other cation gradients were ineffective, suggesting a Na...

... from diffusion, was Na + -and Cl − -independent, and was cis-inhibited by more polar amino acids such as lysine, hydroxyproline, MeAIB, alanine and glutamate. These results suggest that brush-border leucine transport in lobster hepatopancreas at acidic pH may occur by a combination of a modified L...

... gastrointestinal physiology Homarus americanus hepatopancreas Amino acid transport across epithelial membranes occurs by a variety of carrier processes that illustrate various degrees of substrate specificity and are either sodiumdependent or sodium-independent ( Stevens, Ross & Wright, 1982...

...Gregory A. Ahearn; Laurel P. Clay ABSTRACT Transport of L-[ 3 H]lysine by epithelial brush border membrane vesicles (BBMV) of lobster hepatopancreas, formed by a magnesium precipitation technique, was insensitive to transmembrane gradients of Na + , K + , TMA + or H + . Apparent initial lysine...