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  • 1
    Electronic Resource
    Electronic Resource
    Formaldehyde-induced fluorescence in the telencephalon and diencephalon of the eel (Anguilla anguilla L.) (1977)
    Springer
    Cell & tissue research 176 (1977), S. 1-22 
    Details
    ISSN: 1432-0878
    Keywords: Hypothalamus ; Pituitary ; Formaldehyde-induced fluorescence ; Microspectrofluorometry ; Anguilla anguilla L
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In the telencephalon and diencephalon of the eel (Anguilla anguilla L.) formaldehyde-induced fluorescence was studied microscopically and microfluorometrically with special emphasis on the innervation of the pituitary. In the telencephalon fluorescent fibers contained predominantly noradrenaline fluorophores. Fluorescent nuclei could not be established. In the diencephalon fluorescent perikarya were found in: (1) the paraventricular organ (PVO), possessing either dopamine or, to a lesser extent, serotonin fluorophores; (2) the PVO-accompanying group, exhibiting spectral data resembling those of noradrenaline fluorophores; (3) the nucleus hypothalami anterior (NHA), a small paired group of catecholamine-containing cells posterior to the commissura transversa. — The nucleus lobi inferioris exhibited a high density of delicate, most probably dopamine-containing terminals, while fibers surrounding this nucleus contained noradrenaline fluorophores. A high density of fluorescent terminals containing dopamine and/or noradrenaline was also found in the habenular complex. Fluorescent terminals in the pituitary contained fluorophores resembling either dopamine or noradrenaline. Fluorescent tracts entered the pituitary from different directions. A rostral, unpaired tract enters the neurointermediate lobe, as also verified experimentally. The rostral pars distalis receives two paired tracts, one from a rostral and one from a dorsal direction. The proximal pars distalis also receives two paired tracts, one from a dorsal and one from a posterior direction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00220340
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  • 2
    Electronic Resource
    Electronic Resource
    Catecholamine fluorescence in the pituitary of the eel, Anguilla anguilla, with special reference to its variation during background adaptation (1975)
    Springer
    Cell & tissue research 157 (1975), S. 53-72 
    Details
    ISSN: 1432-0878
    Keywords: Neuro-intermediate lobe ; Anguilla anguilla ; Catecholamines ; Melanophore responses ; Fluorescence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In the neuro-intermediate lobe (NIL) of the eel, Anguilla anguilla, a specific formaldehyde-induced fluorescence, indicating a catecholamine (CA) innervation, has been demonstrated in the neural lobe processes. Microspectrofluorimetric analyses and pharmacological treatments indicate noradrenaline or dopamine or both to be responsible for the fluorescence. The fluorescence in the NIL has displayed a definite tendency toward variation during the adaptation to a white and to a black background. The highest amounts of fluorescence were generally found in animals adapted to a black background, especially when adapted for a rather long period, and in animals recently transferred to a white background. The lowest amounts of fluorescence were generally found in animals adapted to a white background. This and the result of injections of CA-depleting drugs suggest that the monoaminergic nerves are active when the animal is on a white background, inhibiting the MSH release directly or indirectly or both, or in co-operation with other factors. Specific green fluorescent structures were also found in other parts of the neural lobe supplying the pars distalis. In some pharmacologically untreated specimens and in animals treated with CA-depleting drugs, the intermedia cells fluoresced. Microspectrofluorimetric analyses indicated that this fluorophore was not a CA. We wish to express our sincere thanks to Miss Ingrid Carlsen for excellent technical assistance, Mr. Lajos Erdös for the photography and the technical staff of the Department of Histology in Lund. We are also indepted to Dr. Anders Björklund for valuable discussion and advice.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00223230
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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