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Carbofuran-induced Alterations (in Vivo) in High-energy Phosphates, Creatine Kinase (CK) and CK Isoenzymes

Overview
Journal Arch Toxicol
Specialty Toxicology
Date 1991 Jan 1
PMID 1953349
Citations 4
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Abstract

Male Sprague-Dawley rats administered with an acute sublethal dose of carbofuran (1.5 mg/kg, s.c.) developed the signs of peak hypercholinergic activity during 30-60 min. At this time, in hemidiaphragm muscle, a significant decrease in ATP (28%) and phosphocreatine (PC) (29%) occurred without concurrent change in AMP and creatine (CR). A significant decrease in the levels of total adenine nucleotides (ATP + ADP + AMP) (20%) and total creatine compounds (PC + CR) (17%) was evident. The decline in the corresponding ratios of ATP/ADP (26%), ATP/AMP (39%), and PC/CR (20%) was therefore suggestive of greater utilization of ATP and PC in response to their increased demand for high-frequency muscle fasciculations. The energy charge = ATP + 1/2 ADP/(ATP + ADP + AMP), an index of high-energy phosphate adequacy in hemidiaphragm, remained unchanged. A significant (p less than 0.01) increase in serum magnesium with no concurrent change in calcium was also evident. The observed higher activity (152%) of total CK (EC 2.7.3.2) in the serum induced by carbofuran was possibly a reflection of more than a twofold increase in CK-BB isoenzyme (CK-1) and 141% increase in CK-MM isoenzyme (CK-3), which also strengthens our findings of enhanced synthesis of ATP and PC. Increased levels of CK-MM isoenzyme in the brain (253%) and hemidiaphragm (195%); and depletion of CK-BB isoenzyme in the hemidiaphragm (0%), heart (42%), and brain (77%), and of CK-MB isoenzyme (CK-2) in the brain (4%) and hemidiaphragm (14%), appeared to be the major contributory factors leading to enhanced serum CK activity.

Citing Articles

Mitochondrial oxidative stress and dysfunction in rat brain induced by carbofuran exposure.

Kamboj S, Kumar V, Kamboj A, Sandhir R Cell Mol Neurobiol. 2008; 28(7):961-9.

PMID: 18340526 PMC: 11515469. DOI: 10.1007/s10571-008-9270-5.


Carbofuran-induced oxidative stress in mammalian brain.

Rai D, Sharma B Mol Biotechnol. 2007; 37(1):66-71.

PMID: 17914167 DOI: 10.1007/s12033-007-0046-9.


Perturbed synaptosomal calcium homeostasis and behavioral deficits following carbofuran exposure: neuroprotection by N-acetylcysteine.

Kamboj A, Sandhir R Neurochem Res. 2007; 32(3):507-16.

PMID: 17268844 DOI: 10.1007/s11064-006-9264-y.


Carbofuran-induced neurochemical and neurobehavioral alterations in rats: attenuation by N-acetylcysteine.

Kamboj A, Kiran R, Sandhir R Exp Brain Res. 2005; 170(4):567-75.

PMID: 16307259 DOI: 10.1007/s00221-005-0241-5.


In vivo alterations in lactate dehydrogenase (LDH) and LDH isoenzymes patterns by acute carbofuran intoxication.

Gupta R, Goad J, Kadel W Arch Environ Contam Toxicol. 1991; 21(2):263-9.

PMID: 1958080 DOI: 10.1007/BF01055345.

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