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  • Differentiation  (1)
  • Life and Medical Sciences  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 108 (1970), S. 475-486 
    ISSN: 1432-0878
    Keywords: Leydig cells ; mice ; Differentiation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Testicular interstitial cells in ddN mice aged 3 to 28 days were studied with the electron microscope. They differed from those in adult mice in several respects: 1) Agranular endoplasmic reticulum and granular endoplasmic reticulum were mixed in the youngest animals, while they were separated topographically in 28 day mice. 2) Mitochondria were usually round between 3 to 10 days, while oval or rod-shaped mitochondria predominated in 28 day animals. Intramitochondrial granules were absent between 3 to 10 days but were occasionally observed in the older animals. 3) Glycogen particles were occasionally arranged in irregular clusters in 3 day old animals, while these structures were absent in the older animals. 4) Membranous whorls were recognized only in 28 day mice. 5) Villous processes on the cell surface facing the perivascular space were poorly developed in the youngest animals, while in 28 day mice they were as prominent as in the adult mouse.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    The @Anatomical Record 163 (1969), S. 595-601 
    ISSN: 0003-276X
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine
    Notes: In combination with biochemical determination of cholesterol in testes, cholesterol was studied histochemically in the testicular interstitial cells of dd strain mice from 5 to 63 days.Cholesterol is found in interstitial cells at five days and cholesterol positive interstitial cells increase significantly from 7% at 5 days to 47% at 21 days (17% at 7 days, 21% at 10 days and 31% at 14 days) and thereafter gradually to 58% at 63 days (50% at 28 days, 54% at 35 days, 56% at 42 days, 58% at 49 days and 57% at 56 days).The cholesterol concentration of testes (μg of cholesterol per mg testicular weight) remains at low values before 42 days (1.33 at 5 days, 2.12 at 7 days, 1.89 at 10 days, 2.18 at 14 days, 2.16 at 21 days, 1.63 at 28 days and 2.09 at 35 days) but it increases rapidly at days 42-49 (2.21 at 42 days and 5.16 at 49 days) and then it is almost unchanged (5.47 at 56 days and 5.18 at 63 days).From these results it is suggested that (1) at five days testicular steroid could be elaborated and (2) the capacity of interstitial cells to produce testicular steroid elevates actively from 42 to 49 days.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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