Publication

ANAEROBIC GLYCOLYSIS AND POSTANOXIC RECOVERY OF RESPIRATION OF RAT CORTICAL SYNAPTOSOMES ARE REDUCED BY SYNAPTOSOMAL SODIUM LOAD

GLEITZ, J., BEILE, A., KHAN, S., WILFFERT, B. & TEGTMEIER, F., 21-May-1993, In : Brain Research. 611, 2, p. 286-294 9 p.

Research output: Contribution to journalArticleAcademicpeer-review

APA

GLEITZ, J., BEILE, A., KHAN, S., WILFFERT, B., & TEGTMEIER, F. (1993). ANAEROBIC GLYCOLYSIS AND POSTANOXIC RECOVERY OF RESPIRATION OF RAT CORTICAL SYNAPTOSOMES ARE REDUCED BY SYNAPTOSOMAL SODIUM LOAD. Brain Research, 611(2), 286-294.

Author

GLEITZ, J ; BEILE, A ; KHAN, S ; WILFFERT, B ; TEGTMEIER, F. / ANAEROBIC GLYCOLYSIS AND POSTANOXIC RECOVERY OF RESPIRATION OF RAT CORTICAL SYNAPTOSOMES ARE REDUCED BY SYNAPTOSOMAL SODIUM LOAD. In: Brain Research. 1993 ; Vol. 611, No. 2. pp. 286-294.

Harvard

GLEITZ, J, BEILE, A, KHAN, S, WILFFERT, B & TEGTMEIER, F 1993, 'ANAEROBIC GLYCOLYSIS AND POSTANOXIC RECOVERY OF RESPIRATION OF RAT CORTICAL SYNAPTOSOMES ARE REDUCED BY SYNAPTOSOMAL SODIUM LOAD', Brain Research, vol. 611, no. 2, pp. 286-294.

Standard

ANAEROBIC GLYCOLYSIS AND POSTANOXIC RECOVERY OF RESPIRATION OF RAT CORTICAL SYNAPTOSOMES ARE REDUCED BY SYNAPTOSOMAL SODIUM LOAD. / GLEITZ, J; BEILE, A; KHAN, S; WILFFERT, B; TEGTMEIER, F.

In: Brain Research, Vol. 611, No. 2, 21.05.1993, p. 286-294.

Research output: Contribution to journalArticleAcademicpeer-review

Vancouver

GLEITZ J, BEILE A, KHAN S, WILFFERT B, TEGTMEIER F. ANAEROBIC GLYCOLYSIS AND POSTANOXIC RECOVERY OF RESPIRATION OF RAT CORTICAL SYNAPTOSOMES ARE REDUCED BY SYNAPTOSOMAL SODIUM LOAD. Brain Research. 1993 May 21;611(2):286-294.


BibTeX

@article{5c3875dced424ff0b8be6eb133125476,
title = "ANAEROBIC GLYCOLYSIS AND POSTANOXIC RECOVERY OF RESPIRATION OF RAT CORTICAL SYNAPTOSOMES ARE REDUCED BY SYNAPTOSOMAL SODIUM LOAD",
abstract = "Synaptosomes of rat cerebral cortex were used to study the effect of veratridine-induced Na+ load on postanoxic recovery of respiration and on aerobic and anaerobic ATP turnover, calculated from rates of oxygen consumption and lactate production. Non-stimulated synaptosomes: after onset of anoxia lactate synthesis of synaptosomes rose immediately from 0.8 to 17.7 nmol lactate/min/mg protein indicating an anaerobic ATP turnover of 17.7 nmol ATP/min/mg protein. This value accounts for 80{\%} of ATP synthesized during oxygenated conditions and seems to cover the energetic demand of anoxic synaptosomes. This assumption was supported by linearity of lactate production throughout anoxia (90 min), by unaffected synaptosomal integrity and by complete recovery of postanoxic respiration after 90 min of anoxia. Stimulated synaptosomes: stimulation of oxygenated synaptosomes with 10(-5) mol/l veratridine enhanced ATP turnover 5-fold, due to activation of Na+/K+ ATPase, as a result of veratridine-induced Na+ influx. Consequently, if not limited in capacity, anaerobic ATP synthesis should be enhanced after addition of veratridine during anoxia. However, the opposite effect was observed. Veratridine reduced anaerobic glycolysis in a concentration-dependent manner. This inhibitory effect could be prevented by tetrodotoxin applied 5 min prior to veratridine. Inhibition of anaerobic glycolysis was independent of extrasynaptosomal glucose (1-30 mmol/l) and Ca2+ concentration (Ca2+-free and 1.2 mmol/l Ca2+). Veratridine stimulation of anoxic synaptosomes reduced also the recovery of postanoxic respiration. The data indicate that Na+ load inhibits anaerobic ATP synthesis, the only energy source during anaerobic conditions. To our knowledge, inhibition of anaerobic glycolysis due to increased Na+ influx has not been shown so far.",
keywords = "ANOXIA, GLYCOLYSIS, MITOCHONDRIA, RESPIRATION, SYNAPTOSOMES, ISCHEMIC BRAIN-DAMAGE, GLUCOSE-METABOLISM, CEREBRAL-ISCHEMIA, ENERGY-METABOLISM, PLASMA-MEMBRANE, ATP SYNTHESIS, CALCIUM, CA-2+, DEPOLARIZATION",
author = "J GLEITZ and A BEILE and S KHAN and B WILFFERT and F TEGTMEIER",
year = "1993",
month = "5",
day = "21",
language = "English",
volume = "611",
pages = "286--294",
journal = "Brain Research",
issn = "0006-8993",
publisher = "ELSEVIER SCIENCE BV",
number = "2",

}

RIS

TY - JOUR

T1 - ANAEROBIC GLYCOLYSIS AND POSTANOXIC RECOVERY OF RESPIRATION OF RAT CORTICAL SYNAPTOSOMES ARE REDUCED BY SYNAPTOSOMAL SODIUM LOAD

AU - GLEITZ, J

AU - BEILE, A

AU - KHAN, S

AU - WILFFERT, B

AU - TEGTMEIER, F

PY - 1993/5/21

Y1 - 1993/5/21

N2 - Synaptosomes of rat cerebral cortex were used to study the effect of veratridine-induced Na+ load on postanoxic recovery of respiration and on aerobic and anaerobic ATP turnover, calculated from rates of oxygen consumption and lactate production. Non-stimulated synaptosomes: after onset of anoxia lactate synthesis of synaptosomes rose immediately from 0.8 to 17.7 nmol lactate/min/mg protein indicating an anaerobic ATP turnover of 17.7 nmol ATP/min/mg protein. This value accounts for 80% of ATP synthesized during oxygenated conditions and seems to cover the energetic demand of anoxic synaptosomes. This assumption was supported by linearity of lactate production throughout anoxia (90 min), by unaffected synaptosomal integrity and by complete recovery of postanoxic respiration after 90 min of anoxia. Stimulated synaptosomes: stimulation of oxygenated synaptosomes with 10(-5) mol/l veratridine enhanced ATP turnover 5-fold, due to activation of Na+/K+ ATPase, as a result of veratridine-induced Na+ influx. Consequently, if not limited in capacity, anaerobic ATP synthesis should be enhanced after addition of veratridine during anoxia. However, the opposite effect was observed. Veratridine reduced anaerobic glycolysis in a concentration-dependent manner. This inhibitory effect could be prevented by tetrodotoxin applied 5 min prior to veratridine. Inhibition of anaerobic glycolysis was independent of extrasynaptosomal glucose (1-30 mmol/l) and Ca2+ concentration (Ca2+-free and 1.2 mmol/l Ca2+). Veratridine stimulation of anoxic synaptosomes reduced also the recovery of postanoxic respiration. The data indicate that Na+ load inhibits anaerobic ATP synthesis, the only energy source during anaerobic conditions. To our knowledge, inhibition of anaerobic glycolysis due to increased Na+ influx has not been shown so far.

AB - Synaptosomes of rat cerebral cortex were used to study the effect of veratridine-induced Na+ load on postanoxic recovery of respiration and on aerobic and anaerobic ATP turnover, calculated from rates of oxygen consumption and lactate production. Non-stimulated synaptosomes: after onset of anoxia lactate synthesis of synaptosomes rose immediately from 0.8 to 17.7 nmol lactate/min/mg protein indicating an anaerobic ATP turnover of 17.7 nmol ATP/min/mg protein. This value accounts for 80% of ATP synthesized during oxygenated conditions and seems to cover the energetic demand of anoxic synaptosomes. This assumption was supported by linearity of lactate production throughout anoxia (90 min), by unaffected synaptosomal integrity and by complete recovery of postanoxic respiration after 90 min of anoxia. Stimulated synaptosomes: stimulation of oxygenated synaptosomes with 10(-5) mol/l veratridine enhanced ATP turnover 5-fold, due to activation of Na+/K+ ATPase, as a result of veratridine-induced Na+ influx. Consequently, if not limited in capacity, anaerobic ATP synthesis should be enhanced after addition of veratridine during anoxia. However, the opposite effect was observed. Veratridine reduced anaerobic glycolysis in a concentration-dependent manner. This inhibitory effect could be prevented by tetrodotoxin applied 5 min prior to veratridine. Inhibition of anaerobic glycolysis was independent of extrasynaptosomal glucose (1-30 mmol/l) and Ca2+ concentration (Ca2+-free and 1.2 mmol/l Ca2+). Veratridine stimulation of anoxic synaptosomes reduced also the recovery of postanoxic respiration. The data indicate that Na+ load inhibits anaerobic ATP synthesis, the only energy source during anaerobic conditions. To our knowledge, inhibition of anaerobic glycolysis due to increased Na+ influx has not been shown so far.

KW - ANOXIA

KW - GLYCOLYSIS

KW - MITOCHONDRIA

KW - RESPIRATION

KW - SYNAPTOSOMES

KW - ISCHEMIC BRAIN-DAMAGE

KW - GLUCOSE-METABOLISM

KW - CEREBRAL-ISCHEMIA

KW - ENERGY-METABOLISM

KW - PLASMA-MEMBRANE

KW - ATP SYNTHESIS

KW - CALCIUM

KW - CA-2+

KW - DEPOLARIZATION

M3 - Article

VL - 611

SP - 286

EP - 294

JO - Brain Research

JF - Brain Research

SN - 0006-8993

IS - 2

ER -

ID: 13858626