scholarly journals Subcellular Distribution of Dietary Methyl-Mercury in Gammarus fossarum and Its Impact on the Amphipod Proteome

2021 ◽  
Author(s):  
Claudia Cosio ◽  
Davide Degli-Esposti ◽  
Christine Almunia ◽  
Véronique Gaillet ◽  
Hervé Sartelet ◽  
...  
Keyword(s):  
Subcellular Distribution ◽  
Methyl Mercury ◽  
Gammarus Fossarum

Differences in Subcellular Distribution of Catechol-O-Methyltransferase and Tyrosinase in Malignant Melanoma

1993 ◽  
Vol 100 ◽  
pp. 222S-225S ◽  
Author(s):  
Takakazu Shibata ◽  
Stan Pavel ◽  
Nico P M Smit ◽  
Yutaka Mishima
Keyword(s):  
Malignant Melanoma ◽  
Subcellular Distribution

Cadmium Accumulation and Subcellular Distribution in Different Organs of Artemisia selengensis

2014 ◽  
Vol 48 (4) ◽  
pp. 381-388
Author(s):  
Dong Meng ◽  
Zhao Yunlin ◽  
Ku Wenzhen ◽  
Zhou Xiaomei ◽  
Li Yanzi
Keyword(s):  
Subcellular Distribution ◽  
Cadmium Accumulation

Methyl mercury in the dutch rhine delta

1994 ◽  
Vol 30 (10) ◽  
pp. 213-219 ◽  
Author(s):  
Hendrik Pieters ◽  
Victor Geuke
Keyword(s):  
Suspended Matter ◽  
Methyl Mercury ◽  
Mercury Contamination ◽  
Benthic Organisms ◽  
Considerable Decrease ◽  
Continuous Sedimentation ◽  
Highly Correlated ◽  
High Level ◽  
Almost All

Samples of yellow eel from various locations in the Dutch Rhine area have been analyzed for trend monitoring of mercury since 1977. In the western Rhine delta mercury levels in eels have hardly changed since the seventies, whereas in the eastern part of the Dutch Rhine area a considerable decrease of mercury concentrations in eel has occurred. Because of continuous sedimentation of contaminated suspended matter transported from upstream regions, accumulation rates and concentrations of mercury in eel in the western Rhine delta remained at a relatively high level. Analyses of methyl mercury in biota have been performed to elucidate the role of methyl mercury in the mercury contamination of the Dutch Rhine ecosystem. Low percentages of methyl mercury were observed in zooplankton (3 to 35%). In benthic organisms (mussels) percentages of methyl mercury ranged from 30 to 57%, while in fish species and liver of aquatic top predator birds almost all the mercury was present in the form of methyl mercury (> 80%). During the period 1970-1990 mercury concentrations of suspended matter in the eastern Rhine delta have drastically decreased. These concentrations seemed to be highly correlated with mercury concentrations of eel (R = 0.84). The consequences of this relation are discussed.

scholarly journals Hepatic endosome fractions contain an ATP-driven proton pump

1985 ◽  
Vol 225 (1) ◽  
pp. 51-58 ◽  
Author(s):  
T Saermark ◽  
N Flint ◽  
W H Evans
Keyword(s):  
Endoplasmic Reticulum ◽  
Golgi Apparatus ◽  
Atpase Activity ◽  
Proton Pump ◽  
Subcellular Distribution ◽  
Plasma Membranes ◽  
Specific Activity ◽  
Ph Gradients ◽  
Subcellular Organelle ◽  
Liver Homogenates

Endosome fractions were isolated from rat liver homogenates on the basis of the subcellular distribution of circulating ligands, e.g. 125I-asialotransferrin internalized by hepatocytes by a receptor-mediated process. The distribution of endocytosed 125I-asialotransferrin 1-2 min and 15 min after uptake by liver and a monensin-activated Mg2+-dependent ATPase activity coincided on linear gradients of sucrose and Nycodenz. The monensin-activated Mg2+-ATPase was enriched relative to the liver homogenates up to 60-fold in specific activity in the endosome fractions. Contamination of the endosome fractions by lysosomes, endoplasmic reticulum, mitochondria, plasma membranes and Golgi-apparatus components was low. By use of 9-aminoacridine, a probe for pH gradients, the endosome vesicles were shown to acidify on addition of ATP. Acidification was reversed by addition of monensin. The results indicate that endosome fractions contain an ATP-driven proton pump. The ionophore-activated Mg2+-ATPase in combination with the presence of undegraded ligands in the endosome fractions emerge as linked markers for this new subcellular organelle.

scholarly journals Shotgun lipidomics and mass spectrometry imaging unveil diversity and dynamics in Gammarus fossarum lipid composition

iScience ◽  
2021 ◽  
Vol 24 (2) ◽  
pp. 102115
Author(s):  
Tingting Fu ◽  
Oskar Knittelfelder ◽  
Olivier Geffard ◽  
Yohann Clément ◽  
Eric Testet ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Lipid Composition ◽  
Mass Spectrometry Imaging ◽  
Shotgun Lipidomics ◽  
Gammarus Fossarum
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