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Storch D, Luebke K, Pause B. There is anger in the air - Preferential processing of chemosensory anger signals in men and women. Int J Psychophysiol 2018. [DOI: 10.1016/j.ijpsycho.2018.07.105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Storch D, Kenzelmann M. Switzerland: a culture of preparedness. KERNTECHNIK 2013. [DOI: 10.3139/124.110192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
The National NBC Protection and Coordination Office supports the activities of all members of the National NBC protection network. These include the development and implementation of operational principles, as well as training and pro-tection concepts on behalf of the head of the Steering Committee on Radioactivity (LAR) and the Federal Office for Civil Protection (FOCP), the chair of the Federal Commission for NBC Protection (ComNBC) and the chair of the Cantonal NBC Coordination Platform (KPABC). Besides exercises at the political-strategic level (civilian and military), operational training exercises are held on a regular basis.
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Affiliation(s)
- D. Storch
- The National NBC Protection and Coordination Office, SPIEZ LABORATORY, CH-3700 Spiez, Switzerland. E-mail:
| | - M. Kenzelmann
- The National NBC Protection and Coordination Office, SPIEZ LABORATORY, CH-3700 Spiez, Switzerland. E-mail:
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Machac A, Zrzavý J, Smrckova J, Storch D. Temperature dependence of evolutionary diversification: differences between two contrasting model taxa support the metabolic theory of ecology. J Evol Biol 2012; 25:2449-56. [PMID: 23116407 DOI: 10.1111/jeb.12019] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2012] [Revised: 08/29/2012] [Accepted: 09/09/2012] [Indexed: 12/01/2022]
Abstract
Biodiversity patterns are largely determined by variation of diversification rates across clades and geographic regions. Although there are multiple reasons for this variation, it has been hypothesized that metabolic rate is the crucial driver of diversification of evolutionary lineages. According to the metabolic theory of ecology (MTE), metabolic rate - and consequently speciation - is driven mainly by body size and environmental temperature. As environmental temperature affects metabolic rate in ecto- and endotherms differently, its impact on diversification rate should also differ between the two types of organisms. Employing two independent approaches, we analysed correlates of speciation rates and, ultimately, net diversification rates for two contrasting taxa: plethodontid salamanders and carnivoran mammals. Whereas in the ectothermic plethodontids speciation rates positively correlated with environmental temperature, in the endothermic carnivorans a reverse, negative correlation was detected. These findings comply with predictions of the MTE and suggest that similar geographic patterns of biodiversity across taxa (e.g. ecto- and endotherms) might have been generated by different ecological and evolutionary processes.
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Affiliation(s)
- A Machac
- Center for Theoretical Study, Charles University and Academy of Sciences of the Czech Republic, Praha, Czech Republic.
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Storch D, Schmitt JS, Waldherr C, Waser B, Reubi JC, Maecke HR. Preclinical evaluation of somatostatin analogs bearing two macrocyclic chelators for high specific activity labeling with radiometals. RADIOCHIM ACTA 2009. [DOI: 10.1524/ract.2007.95.6.359] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Radiometallated analogues of the regulatory peptide somatostatin are of interest in the in vivo localization and targeted radiotherapy of somatostatin receptor-overexpressing tumors. An important aspect of their use in vivo is a fast and efficient labeling (complexation) protocol for radiometals along with a high specific activity.
We describe in this manuscript synthetic methods for the coupling of two chelators (1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid=DOTA) to the bioactive peptide [Tyr3, Thr8]-octreotide (TATE) in order to increase the specific activity (radioactivity in Bq per mole peptide). The full chelator-linker-peptide conjugate was assembled on solid support using standard Fmoc chemistry. Two DOTA-chelators were linked to the peptide using lysine or N,N′-bis(3-aminopropyl)-glycine (Apg); in addition, pentasarcosine (Sar5) was used as a spacer between the chelators and the peptide to probe its influence on biology and pharmacology. Complexation rates with In3+ and Y3+ salts and the corresponding radiometals were high, the bis-DOTA-derivatives showed higher complexation rates and gave higher specific activity than DOTA-TATE.
Pharmacological and biological data of the complexed molecules did not show significant differences if compared to the parent peptide [111/natIn-DOTA]-TATE except for [(111/natIn-DOTA)2-Apg]-TATE which showed a lower binding affinity and rate of internalization into tumor cells. The biodistribution of [(111/natIn-DOTA)-Lys(111/natIn-DOTA)]-TATE in the rat tumor model (AR4-2J) showed a high and specific (as shown by a blocking experiment) tracer uptake in somatostatin receptor-positive tissue but a lower tumor uptake compared to [111/natIn-DOTA]-TATE.
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Wicki A, Wild D, Storch D, Seemayer C, Gotthardt M, Behe M, Kneifel S, Mihatsch MJ, Reubi JC, Mäcke HR, Christofori G. [Lys40(Ahx-DTPA-111In)NH2]-Exendin-4 is a highly efficient radiotherapeutic for glucagon-like peptide-1 receptor-targeted therapy for insulinoma. Clin Cancer Res 2007; 13:3696-705. [PMID: 17575235 DOI: 10.1158/1078-0432.ccr-06-2965] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE Although metabolic changes make diagnosis of insulinoma relatively easy, surgical removal is hampered by difficulties in locating it, and there is no efficient treatment for malignant insulinoma. We have previously shown that the high density of glucagon-like peptide-1 receptors (GLP-1R) in human insulinoma cells provides an attractive target for molecular imaging and internal radiotherapy. In this study, we investigated the therapeutic potential of [Lys(40)(Ahx-DTPA-(111)In)NH(2)]-Exendin-4, an (111)In-labeled agonist of GLP-1, in a transgenic mouse model of human insulinoma. EXPERIMENTAL DESIGN [Lys(40)(Ahx-DTPA-(111)In)NH(2)]-Exendin-4 was assessed in the Rip1Tag2 mouse model of pancreatic beta-cell carcinogenesis, which exhibits a GLP-1R expression comparable with human insulinoma. Mice were injected with 1.1, 5.6, or 28 MBq of the radiopeptide and sacrificed 7 days after injection. Tumor uptake and response, the mechanism of action of the radiopeptide, and therapy toxicity were investigated. RESULTS Tumor uptake was >200% injected activity per gram, with a dose deposition of 3 Gy/MBq at 40 pmol [Lys(40)(Ahx-DTPA-(111)In)NH(2)]-Exendin-4. Other GLP-1R-positive organs showed > or =30 times lower dose deposition. A single injection of [Lys(40)(Ahx-DTPA-(111)In)NH(2)]-Exendin-4 resulted in a reduction of the tumor volume by up to 94% in a dose-dependent manner without significant acute organ toxicity. The therapeutic effect was due to increased tumor cell apoptosis and necrosis and decreased proliferation. CONCLUSIONS The results suggest that [Lys(40)(Ahx-DTPA-(111)In)NH(2)]-Exendin-4 is a promising radiopeptide capable of selectively targeting insulinoma. Furthermore, Auger-emitting radiopharmaceuticals such as (111)In are able to produce a marked therapeutic effect if a high tumor uptake is achieved.
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Affiliation(s)
- Andreas Wicki
- Institute of Biochemistry and Genetics, DKBW, Medical School, University of Basel, Basel, Switzerland
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Wild D, Béhé M, Wicki A, Storch D, Waser B, Gotthardt M, Keil B, Christofori G, Reubi JC, Mäcke HR. [Lys40(Ahx-DTPA-111In)NH2]exendin-4, a very promising ligand for glucagon-like peptide-1 (GLP-1) receptor targeting. J Nucl Med 2006; 47:2025-33. [PMID: 17138746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023] Open
Abstract
UNLABELLED High levels of glucagon-like peptide-1 (GLP-1) receptor expression in human insulinomas and gastrinomas provide an attractive target for imaging, therapy, and intraoperative tumor localization, using receptor-avid radioligands. The goal of this study was to establish a tumor model for GLP-1 receptor targeting and to use a newly designed exendin-4-DTPA (DTPA is diethylenetriaminepentaacetic acid) conjugate for GLP-1 receptor targeting. METHODS Exendin-4 was modified C-terminally with Lys(40)-NH(2), whereby the lysine side chain was conjugated with Ahx-DTPA (Ahx is aminohexanoic acid). The GLP-1 receptor affinity (50% inhibitory concentration [IC(50)] value) of [Lys(40)(Ahx-DTPA)NH(2)]exendin-4 as well as the GLP-1 receptor density in tumors and different organs of Rip1Tag2 mice were determined. Rip1Tag2 mice are transgenic mice that develop insulinomas in a well-defined multistage tumorigenesis pathway. This animal model was used for biodistribution studies, pinhole SPECT/MRI, and SPECT/CT. Peptide stability, internalization, and efflux studies were performed in cultured beta-tumor cells established from tumors of Rip1Tag2 mice. RESULTS The GLP-1 receptor affinity of [Lys(40)(Ahx-DTPA)NH(2)]exendin-4 was found to be 2.1 +/- 1.1 nmol/L (mean +/- SEM). Because the GLP-1 receptor density in tumors of Rip1Tag2 mice was very high, a remarkably high tumor uptake of 287 +/- 62 %IA/g (% injected activity per gram tissue) was found 4 h after injection. This resulted in excellent tumor visualization by pinhole SPECT/MRI and SPECT/CT. In accordance with in vitro data, [Lys(40)(Ahx-DTPA-(111)In)NH(2)]exendin-4 uptake in Rip1Tag2 mice was also found in nonneoplastic tissues such as pancreas and lung. However, lung and pancreas uptake was distinctly lower compared with that of tumors, resulting in a tumor-to-pancreas ratio of 13.6 and in a tumor-to-lung ratio of 4.4 at 4 h after injection. Furthermore, in vitro studies in cultured beta-tumor cells demonstrated a specific internalization of [Lys(40)(Ahx-DTPA-(111)In)NH(2)]exendin-4, whereas peptide stability studies indicated a high metabolic stability of the radiopeptide in beta-tumor cells and human blood serum. CONCLUSION The high density of GLP-1 receptors in insulinomas as well as the high specific uptake of [Lys(40)(Ahx-DTPA-(111)In)NH(2)]exendin-4 in the tumor of Rip1Tag2 mice indicate that targeting of GLP-1 receptors in insulinomas may become a useful imaging method to localize insulinomas in patients, either preoperatively or intraoperatively. In addition, Rip1Tag2 transgenic mice represent a suitable animal tumor model for GLP-1 receptor targeting.
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Affiliation(s)
- Damian Wild
- Clinic and Institute of Nuclear Medicine, University Hospital Basel, Basel, Switzerland
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Storch D, Béhé M, Walter MA, Chen J, Powell P, Mikolajczak R, Mäcke HR. Evaluation of [99mTc/EDDA/HYNIC0]octreotide derivatives compared with [111In-DOTA0,Tyr3, Thr8]octreotide and [111In-DTPA0]octreotide: does tumor or pancreas uptake correlate with the rate of internalization? J Nucl Med 2005; 46:1561-9. [PMID: 16157541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/04/2023] Open
Abstract
UNLABELLED Radiolabeled somatostatin analogs are important tools for the in vivo localization and targeted radionuclide therapy of somatostatin receptor-positive tumors. The aim of this study was to compare 3 somatostatin analogs designed for the labeling with (99m)Tc (where HYNIC is 6-hydrazinopyridine-3-carboxylic acid): 6-hydrazinopyridine-3-carboxylic acid(0)-octreotide (HYNIC-OC/(99m)Tc-(1)), [HYNIC(0),Tyr(3)]octreotide (HYNIC-TOC/(99m)Tc-(2)), and [HYNIC(0),Tyr(3),Thr(8)]octreotide (HYNIC-TATE/(99m)Tc-(3)), using ethylenediamine-N,N'-diacetic acid (EDDA) as a coligand. In addition, we compared the (99m)Tc-labeled peptides [(111)In-diethylenetriaminepentaacetic acid(0)]octreotide ([(111)In-DTPA]-OC) and [(111)In-1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid(0),Tyr(3),Thr(8)]octreotide ([(111)In-DOTA]-TATE) with regard to the rate of internalization and the biodistribution in AR4-2J (expressing the somatostatin receptor subtype 2) tumor-bearing rats. The main attention was directed toward a potential correlation between the rate of internalization and the tumor or pancreas uptake. METHODS Synthesis was performed on solid phase using a standard Fmoc strategy. Internalization was studied in cell culture (AR4-2J) and biodistribution was studied using a Lewis rat tumor model (AR4-2J). RESULTS The 5 radiopeptides showed a specific internalization into AR4-2J cells in culture (as shown by blocking experiments). The rate of internalization of the 5 radiopeptides differed significantly according to the following order: (99m)Tc-(1) approximately = [(111)In-DTPA]-OC < (99m)Tc-(2) < (99m)Tc-(3) approximately = [(111)In-DOTA]-TATE. All radiopeptides displayed a rapid blood clearance and a fast clearance from all somatostatin receptor-negative tissues predominantly via the kidneys. A receptor-specific uptake of radioactivity was observed for all compounds in somatostatin receptor-positive organs such as the pancreas, the adrenals, and the stomach. After 4 h, the uptake in the AR4-2J tumor was comparable for (99m)Tc-(2) (3.85 +/- 1.0 injected dose per gram tissue (%ID/g)), (99m)Tc-(3) (3.99 +/- 0.58%ID/g), and [(111)In-DOTA]-TATE (4.12 +/- 0.74%ID/g) but much lower for [(111)In-DTPA]-OC (0.99 +/- 0.08%ID/g) and (99m)Tc-(1) (0.70 +/- 0.13%ID/g). The specificity was determined by blocking experiments using a large excess of [Tyr(3)]octreotide. (99m)Tc-(3) displayed the highest tumor-to-kidney ratio (2.5:1), followed by (99m)Tc(2) (1.9:1) and [(111)In-DOTA]-TATE (1.7:1). CONCLUSION These data show that the 5 radiopeptides are specific radioligands for the somatostatin receptor subtype 2. The rate of internalization correlates with the uptake in the tumor (R(2) = 0.75; P = 0.026) and pancreas (R(2) = 0.98; P = 7.4.10(-5)). [Tyr(3),Thr(8)]octreotide derivatives show superiority over the corresponding octreotide and [Tyr(3)]octreotide derivatives, indicating that [(111)In-DOTA]-TATE and [(99m)Tc/EDDA/HYNIC]-TATE are suitable candidates for clinical studies.
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Affiliation(s)
- Daniel Storch
- Division of Radiological Chemistry, Department of Radiology, University Hospital of Basel, Basel, Switzerland
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Forrer F, Uusijärvi H, Storch D, Maecke HR, Mueller-Brand J. Treatment with 177Lu-DOTATOC of patients with relapse of neuroendocrine tumors after treatment with 90Y-DOTATOC. J Nucl Med 2005; 46:1310-6. [PMID: 16085587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023] Open
Abstract
UNLABELLED Therapy with [(90)Y-DOTA(0), Tyr(3)]-octreotide (DOTATOC, where DOTA = tetraazacyclododecane tetraacetic acid and TOC = D-Phe-c(Cys-Tyr-D-Trp-Lys-Thr-Cys)-Thr(ol)) is established for the treatment of metastatic neuroendocrine tumors. Nevertheless, many patients experience disease relapse, and further treatment may cause renal failure. Trials with (177)Lu-labeled somatostatin analogs showed less nephrotoxicity. We initiated a prospective study with (177)Lu-DOTATOC in patients with relapsed neuroendocrine tumors after (90)Y-DOTATOC treatment. METHODS Twenty-seven patients, pretreated with (90)Y-DOTATOC, were included. The mean time between the last treatment with (90)Y-DOTATOC and (177)Lu-DOTATOC was 15.4 +/- 7.8 mo (SD). All patients were injected with 7,400 MBq of (177)Lu-DOTATOC. Restaging was performed after 8-12 wk. Hematotoxicity or renal toxicity of World Health Organization grade 1 or 2 was not an exclusion criterion. RESULTS Creatinine levels increased significantly, from 66 +/- 14 micromol/L to 100 +/- 44 micromol/L (P < 0.0001), after (90)Y-DOTATOC therapy. The mean hemoglobin level dropped from 131 +/- 14 to 117 +/- 13 g/L (P < 0.0001) after (90)Y-DOTATOC therapy. (177)Lu-DOTATOC therapy was well tolerated. No serious adverse events occurred. The mean absorbed doses were 413 +/- 159 mGy for the whole body, 3.1 +/- 1.5 Gy for the kidneys, and 61 +/- 5 mGy for the red marrow. After restaging, we found a partial remission in 2 patients, a minor response in 5 patients, stable disease in 12 patients, and progressive disease in 8 patients. Mean hemoglobin and creatinine levels did not change significantly. CONCLUSION (177)Lu-DOTATOC therapy in patients with relapse after (90)Y-DOTATOC treatment is feasible, safe, and efficacious. No serious adverse events occurred.
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Affiliation(s)
- Flavio Forrer
- Institute of Nuclear Medicine, University Hospital, Basel, Switzerland.
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PÖrtner H, Lucassen M, Storch D. Metabolic Biochemistry: Its Role in Thermal Tolerance and in the Capacities of Physiological and Ecological Function. Fish Physiology 2005. [DOI: 10.1016/s1546-5098(04)22003-9] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
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Storch D, Heilmayer O, Hardewig I, Pörtner HO. In vitro protein synthesis capacities in a cold stenothermal and a temperate eurythermal pectinid. J Comp Physiol B 2003; 173:611-20. [PMID: 12905006 DOI: 10.1007/s00360-003-0371-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/13/2003] [Indexed: 11/29/2022]
Abstract
The translational system was isolated from the gills of the Antarctic scallop Adamussium colbecki (Smith) and the European scallop Aequipecten opercularis (Linnaeus) for in vitro protein synthesis capacities microg protein mg FW(-1) day(-1)) and the translational capacities of RNA (k(RNA in vitro) mg protein mg RNA(-1) day(-1)). In vitro protein synthesis capacity in the cold-adapted pectinid at 0 degrees C was similar to the one found in the temperate scallop at 25 degrees C. These findings might reflect cold compensated rates in Adamussium colbecki, partly explainable by high tissue levels of RNA. Cold-compensated in vitro protein synthesis capacities may further result from increments in the translational capacity of RNA. The thermal sensitivity of the translation machinery was slightly different in the two species, with significantly lower levels of Arrhenius activation energies E(a) and Q(10) in Adamussium colbecki in the temperature range 0-15 degrees C. Reduced protein synthesis and translational capacities were found in vitro in gills of long-term aquarium-maintained Adamussium colbecki and were accounted for by a loss of protein synthesis machinery, i.e. a reduction in RNA levels, as well as a decrease in the amount of protein synthesized per milligram of RNA (RNA translational capacity, k(RNA in vitro)). Such changes may involve food uptake or mirror metabolic depression strategies, like those occurring during winter. Consequences of high in vitro RNA translational capacities found in the permanently cold-adapted species are discussed in the context of seasonal food availability and growth rates at high latitudes.
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Affiliation(s)
- D Storch
- Benthic Systems, Ecophysiology and Ecotoxicology, Alfred Wegener Institute for Polar and Marine Research, Columbusstrasse, D-27568, Bremerhaven, Germany
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Storch D, Abele D, Pörtner HO. The effect of hydrogen peroxide on isolated body wall of the lugworm Arenicola marina (L.) at different extracellular pH levels. Comp Biochem Physiol C Toxicol Pharmacol 2001; 128:391-9. [PMID: 11255112 DOI: 10.1016/s1532-0456(00)00209-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The effect of hydrogen peroxide on the rate of tissue oxygen consumption, on intracellular pH (pH(i)) and on malondialdehyde (MDA) accumulation was studied in isolated body wall tissue of the lugworm Arenicola marina (L.). H2O2 effects were investigated at various levels of pH(i) by changing medium pH (pH(e)). The largest decrease of tissue oxygen consumption (by 17% below controls), as well as the highest degree of MDA accumulation (four-fold compared to control values) after H2O2 exposure were found at acidic pH(e) of 6.4. This was attributed to the higher redox potential of H2O2 in acidic solutions. Oxygen consumption at alkaline pH(e) (8.5) was not affected by H2O2. MDA accumulation in the tissue was considerably lower than at pH(e) 7.4 or 6.4. Despite pH dependent alterations of H2O2 redox potential, we observed more or less constant pH(e) independent acidification of the tissue upon exposure to H2O2. We attributed the acidification to an inhibition of ATP consuming proton equivalent ion transport across the cellular membrane. Inactivation of carrier proteins is discussed to be responsible for the decrease in tissue oxygen consumption. However, with a larger effect on oxygen consumption at acidic pH(e) values, the latter may not be the only explanation, but additional impairment of other energy demanding processes may be involved.
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Affiliation(s)
- D Storch
- Biologie I/Benthische Okosysteme, Alfred-Wegener-Institut für Polar-und Meeresforschung, Columbusstrasse, D-27568, Bremerhaven, Germany.
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Grilleau J, Storch D, Blanck MF, Polliot ML. [A case of post-morbillous pseudoretinitis pigmentosa]. Bull Soc Ophtalmol Fr 1977; 77:229-33. [PMID: 606381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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