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Remarkable adrenergic nerves in the exocrine pancreas

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Summary

The adrenergic nerves in the pancreas of mice, rats, guinea-pigs, rabbits, and cats were investigated with the fluorescence method of Falck and Hillarp. The relations between the adrenergic fibres and the vessels were studied by the injection of india ink into the vessels.

Besides the normal manifestation of adrenergic fibres at the large vessels, some vessels of capillary size were also accompanied by adrenergic fibres. These fibres had a very weak fluorescence, and showed up regularly only when the animal had been treated with Nialamide and L-DOPA or dopamine to increase the catecholamine content of the adrenergic fibres. The weakness of the fluorescence is perhaps due to low transmitter concentration or to small size of the nerve fibres, or to both. A rough estimate indicated that either the transmitter concentration of the nerve fibre is at least approximately 100 times below that seen in adrenergic nerves in other tissues, or that the radius of the varicosities of the nerve fibres is less than 0.2 μ. Neither alternative has previously been recognized.

The secretory acini of the pancreas seem to lack a direct adrenergic supply. In the intrapancreatic ganglia, non-fluorescent nerve cells were reached by adrenergic terminals. No adrenergic nerve cells were detected in the pancreas of rats and cats. Small intensely fluorescent catecholamine-containing cells were observed in connexion with the intrapancreatic ganglia of rats.

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Authors and Affiliations

  1. Department of Histology, University of Lund, Lund, Sweden

    P. Alm, L. Cegrell, B. Ehinger & B. Falck

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  1. P. Alm
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  2. L. Cegrell
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  3. B. Ehinger
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  4. B. Falck
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Additional information

The research reported in this document has been sponsored by the Air Force Office of Scientific Research under grant AF EOAR 67-15 through the European Office of Aerospace Research (OAR), United States Air Force, by the United States Public Health Service (grant NB 06701-01) by the Swedish Medical Research Council (project B 67-12X-712-02A), and by the Faculty of Medicine, University of Lund, Sweden.

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Alm, P., Cegrell, L., Ehinger, B. et al. Remarkable adrenergic nerves in the exocrine pancreas. Zeitschrift für Zellforschung 83, 178–186 (1967). https://doi.org/10.1007/BF00362399

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  • DOI: https://doi.org/10.1007/BF00362399

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