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PubMedDate not supplied

[Histophysiological characteristics of the structures of the subcommissural organ of the brain and the glomerular zone of the adrenal gland in changes of the water-electrolyte balance].

Experiments were conducted on 45 male rats; histophysiological characteristics of ependymocytes of the subcommissural organ (SCO) and of adrencorticocytes of the glomerular zone of the adrenal cortex (GZA) was investigated under conditions of dehydration and water loading. A marked activation of H-6-PDH, HDH, NAD-dependent alphaHPDH, and an enhancement of the H-6-PDH, NAD-diaphorase and 3betaol activity in the GZA adrencorticocytes resulted from dehydration. Water loading depressed the synthetic processes, particularly in the SCO ependymocytes. The data obtained suggest a functional interrelation between the SCO and GZA.

Adrenal Cortex↗
PubMed1984

Microphotometric determination of enzyme activities in type-grouped fibres of reinnervated rat muscle.

Activities of succinate dehydrogenase (SDH), glycerolphosphate oxidase (GP-OX), cytochrome oxidase (CYT-OX) and lactate dehydrogenase (LDH) were determined microphotometrically in single, actomyosin-ATPase typed ( Guth and Samaha 1970) fibres within cross-sections of normal and reinnervated rat tibialis anterior muscles. SDH and GP-OX activities displayed pronounced scattering and large overlaps existed between alpha-, alpha beta-, and beta-fibres of normal muscle. Coefficients of variation were in the range of 16-40% for GP-OX and SDH in the different fibre populations. Enzyme activity determinations in type-grouped alpha-, alpha beta-, and beta-fibres of reinnervated muscle showed much less scattering than in normally distributed alpha-, alpha beta-, and beta-fibres of control muscles. Coefficients of variation were in the range of 10-13% for SDH, GP-OX, CYT-OX and LDH. The experimental error of the kinetic microphotometric measurement of enzyme activities in situ is in the range of 10% ( Reichmann and Pette 1982). Our results therefore suggest a high degree of metabolic similarity or homogeneity of typed-grouped muscle fibres and thus support the assumption that type-grouped fibres are homogeneous and correspond to regularly assembled motor units.

Actomyosin↗