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Species differences in inner ear fluids

Biochemische Unterschiede der Innenohrflüssigkeiten bei verschiedenen Tierarten

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Zusammenfassung

Die Innenohrflüssigkeiten von Meerschweinchen und Katzen wurden auf den Gehalt von Na, K, Chlorverbindungen, Glukose und Gesamtprotein untersucht, um artspezifische Unterschiede festzustellen. In der Perilymphe von Scala tympani und Scala vestibuli sind Na, K, Chloride und Gesamtprotein beim Meerschweinchen geringer als bei der Katze. Dagegen zeigt die Perilymphe des Meerschweinchens einen höheren Glukosegehalt als die der Katze. Die Endolymphe des Utriculus enthält beim Meerschweinchen mehr Na und weniger K als bei der Katze. Die Resultate sind wichtig für phylogenetische Untersuchungen der Biochemie der Innenohrflüssigkeiten.

Summary

Inner ear fluids of guinea pigs and cats were analyzed for sodium, potassium, chloride, glucose, and total protein to determine species differences in chemical compositions. In the scala vestibuli perilymph and scala tympani perilymph, sodium, potassium, and choride levels in the guinea pig were lower than in the cat. The protein levels in the scala vestibuli perilymph and scala tympani perilymph of the guinea pig were lower than those of the cat. The glucose levels in the guinea pig were higher in the scala vestibuli perilymph and scala tympani perilymph, as compared to findings in the cat. Regarding the utricular endolymph, there were significant differences between guinea pigs and cats in sodium and potassium concentrations; the concentration in the former being higher in sodium and lower in potassium. These findings are pertinent for the phylogenetic studies on inner ear fluid biochemistry.

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Additional information

This work was supported by Research Grant No. ROI-NS1026801 from the National Institute of Neurological Diseases and Strokes, USA

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Makimoto, K., Takeda, T. & Silverstein, H. Species differences in inner ear fluids. Arch Otorhinolaryngol 228, 187–193 (1980). https://doi.org/10.1007/BF00454226

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Schlüsselwörter

  • Unterschiede bei Tierarten
  • Chemie der Körperflüssigkeiten
  • Innenohrflüssigkeiten

Key words

  • Species difference
  • Body fluids chemistry
  • Inner ear fluids