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Satellite cells in the tail muscles of the urodelan larvae during development (1984)

Takahama, Hideki ; Mizuhira, Vinci ; Sasaki, Fumie ; [et al.]

Springer

Cell & tissue research 236 (1984), S. 431-438

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ISSN: 1432-0878

Keywords: Satellite cells ; Satellite fibres ; Tail muscle ; Urodela ; Ultrastructure

Source: Springer Online Journal Archives 1860-2000

Topics: Biology , Medicine

Notes: Summary The incidence and ultrastructure of satellite cells in the tail muscles of urodelan larvae were examined during development during which the number of satellite cells is gradually reduced. They are found more frequently in red than in the white fibres in all four stages examined (stage 53, 64, 66+ and juvenile). As development proceeds, intercellular space between satellite cell and muscle fibre is in general gradually extended and is mostly filled with basal lamina. Small muscle cells, satellite fibres, which are situated under the basal lamina of the parent fibre, are morphologically similar to satellite cells but contain a small amount of myofibrils. Three types of satellite fibres are distinguishable on the basis of differences in K2-EDTA-treated ATPase activity, width of Z line, and parent fibre type. Neuromuscular junctions are visible in satellite fibres.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00214247

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Postnatal development of acinar cells in rat submandibular gland as revealed by electron microscopic staining for carbohydratesThis investigation was supported by grants 977008 (1974) and 077116 (1975) form the Ministry of Education of Japan. (1976)

Yamashina, Shohei ; Mizuhira, Vinci

New York, NY [u.a.] : Wiley-Blackwell

American Journal of Anatomy 146 (1976), S. 211-235

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ISSN: 0002-9106

Keywords: Life and Medical Sciences ; Cell & Developmental Biology

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Medicine

Notes: The postnatal differentiation of acinar cells in rat submandibular gland was studied by staining with periodic acid-thiosemicarbazide-silver proteinate to identify carbohydrate-containing macromolecules in the electron microscope. This method revealed glycogen particles and internal substructure in the secretory granules of developing acinar cells. On the basis of morphologic and histochemical criteria three phases of acinar cell development were defined. In the pro-acinar phase, during the first week after birth, pro-acinar cells and terminal tubular cells were the main components of the terminal tubules in the rudimentary gland. The secretory granules of the pro-acinar cells contained speckled or rod-like substructures which stained intensively for carbohydrates and were digested by proteolytic enzymes. During the second to third week after birth, which is the immature-acinar-cell phase, thread-like substructures were seen in the secretory granules. These structures, which were not digested by proteolytic enzymes, disappeared gradually. The acinar cells of 4-week-old or older rats displayed no particular substructure in the secretion granules and represented the final, mature phase of development.

Additional Material: 1 Ill.