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  • 1
    ISSN: 1432-0878
    Keywords: Steroid binding ; Pituitary gland ; Teleost ; Histochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Specific binding sites for estrogen, testosterone, and progesterone have been demonstrated in the pituitary gland of mature male and female platyfish (Xiphophorus maculatus). With a histochemical procedure, fluorescent-steroid-hormone conjugates were localized in the cytoplasm and nucleus of the gonadotrops of the caudal pars distalis (CPD) and in cells of the pars intermedia (PI) previously demonstrated to contain immunoreactive gonadotropin. The specificity of the response was confirmed by means of competitive binding analyses and by using fluoresceinated BSA not linked to steroids. The physiological significance of steroid binding in the PI, as well as in the CPD, is discussed in the light of other recent studies on the pituitary gland of the platyfish.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 221 (1981), S. 257-267 
    ISSN: 1432-0878
    Keywords: Immunocytochemistry ; Human pituitary hormone antisera ; Platyfish ; Pituitary gland
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In this communication we describe the immunocytochemical cross-reactivity between antisera to various human pituitary hormones and specific hormone producing cell types in the pituitary gland of sexually mature male platyfish (Xiphophorus maculatus). Antisera to human pituitary hormones cross-reacted either with cells known to produce corresponding hormones (or hormone subunits) in the platyfish (e.g., ACTH, prolactin, TSH β, LH α, FSH α, TSH α) or with no pituitary cells at all (e.g., LH β, FSH β). The one exception was antiserum to human growth hormone which cross-reacted with MSH and ACTH producing cells. The platyfish pituitary is proposed as a test system for immunocytochemically screening antisera for purity and specificity in order to determine their applicability in particular studies.
    Type of Medium: Electronic Resource
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