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Cerebral energy metabolism in experimental canine hydrocephalus

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Abstract

Cerebral energy metabolism, its relationship to the stage and extent of hydrocephalus, and the effect of cerebrospinal fluid (CSF) removal on it were studied in experimental canine hydrocephalus produced by intracisternal injection of kaolin by using phosphorus-31 (P-31) magnetic resonance (MR) spectroscopy and MR imaging, P-31 MR spectra were serially obtained before and after CSF removal, maximally on eight occasions over a period of nearly 5 h. There was a decrease in the ratio of creatine phosphate to inorganic phosphate, used as an indicator of the bioenergetic state, in acute and subacute stages of hydrocephalus as compared with the control. An animal in the subacute stage, when periventricular edema was most prominent, exhibited the most predominent decrease in this ratio at 14 days after hydrocephalic insult. The recovery of the ratio toward the control level was seen in the chronically hydrocephalic animal. There was no change in adenosine triphosphate (ATP) levels in any stage of hydrocephalus. Serial spectra obtained after the withdrawal of ventricular CSF showed no change in the bioenergetic state of the brain in any stage of hydrocephalus. There was no relationship between either the extent of hydrocephalus or the ventricular CSF pressure and the change in the bioenergetic state or the levels of any of the phosphorus compounds. These findings may indicate the alteration of the mitochondrial energy metabolism in hydrocephalus, which may explain the mechanism of hydrocephalic syndrome.

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Authors and Affiliations

  1. Department of Neurosurgery, Kobe University School of Medicine, 650, Kobe, Japan

    Norihiko Tamaki, Muneaki Yasuda & Satoshi Matsumoto

  2. Systems Engineering Laboratory, Asahi Chemical Industry Co. Ltd., Atsugi, Japan

    Tohru Yamamoto & Norio Iriguchi

Authors
  1. Norihiko Tamaki
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  2. Muneaki Yasuda
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  3. Satoshi Matsumoto
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  4. Tohru Yamamoto
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  5. Norio Iriguchi
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Tamaki, N., Yasuda, M., Matsumoto, S. et al. Cerebral energy metabolism in experimental canine hydrocephalus. Child's Nerv Syst 6, 172–178 (1990). https://doi.org/10.1007/BF00308496

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  • DOI: https://doi.org/10.1007/BF00308496

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