E<scp>lectron</scp> M<scp>icroscopic</scp> O<scp>bservations on the</scp> S<scp>ecretory</scp> P<scp>rocesses of the</scp> A<scp>xillary</scp> A<scp>pocrine</scp> G<scp>lands</scp>

Yamada, Hideo

doi:10.1111/j.1440-1827.1960.tb01175.x

Cited by 11 publications

(3 citation statements)

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“…They have been studied by cytochemical and the electron microscopic techniques in salivary glands (24,(40)(41)(42)(44)(45)(46); in lacrimal glands (25,26,40); in mammary glands (5,11,15,22,42,44); in the prostate (38); in the Harderian gland (4, 25); and in apocrine) (14,16,19,48) and eccrine (8,13,18,30,32,33 sweat glands. All of these investigators agree that the myoepithelial cells lie on the epithelial side of the basement membrane, and most authors note the similarity between filaments in the cytoplasm of smooth muscle and myoepithelium.…”

Section: Introductionmentioning

confidence: 99%

Fine Structure of the Myoepithelium of the Eccrine Sweat Glands of Man

Ellis

1965

The Journal of Cell Biology

114

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A B S T R A C TThe secretory coils of glutaraldehyde-osmium tetroxide-fixed and Epon-Araldite-embedded eccrine sweat glands from the palms of young men were studied with the electron microscope. The myoepithclial cells lie on the epithelial side of the basement membrane and abut other epithelial elements directly. The irregularly serrated base of the cell has dense thickenings along the plasma membranc which alternate with zones bcaring pits; the smooth apical surface lacks dense thickenings, is studded with pits, and conjoined to secretory cells by cccasional desmosomes. Masses of myofilaments, 50 A in diameter, fill most of the cell and are associated with irregular dense zones. In cross-section the arrangement of the myofilaments seems identical with that of the I band of striated muscle, and the dense zone has typical Z band structure. A few microtubules and cytoplasmic cores bearing profiles of the endoplasmic reticulum, filamentous mitochondria, and glycogen granules penetrate the fibrillar masses and run parallel to the oriented myofilaments. In the perinuclear zone, Golgi membranes, rough-and smooth-surfaced elements of the endoplasmic reticulum, mitochondria, glycogen, microtubules, lipid, pigment, and dense granules are variable components in the cytoplasm. The interrelationships of the myoepithelial cells with the secretory cells suggest that the former may act as regulators, controlling the flow of metabolites to the secretory epithelium. I N T R O D U C T I O NMyoepithelial cells are common components of many vertebrate glands that take their origin from the embryonic ectoderm. They have been studied by cytochemical and the electron microscopic techniques in salivary glands (24,(40)(41)(42)(44)(45)(46); in lacrimal glands (25,26,40); in mammary glands (5,11,15,22,42,44); in the prostate (38); in the Harderian gland (4, 25); and in apocrine) (14,16,19,48) and eccrine (8,13,18,30,32,33 sweat glands. All of these investigators agree that the myoepithelial cells lie on the epithelial side of the basement membrane, and most authors note the similarity between filaments in the cytoplasm of smooth muscle and myoepithelium. The literature shows that although the myoepithelial cells of various glands may differ in size and shape, they are essentially similar in their fine structure. In some glands the contractile function of the myoepithelial elements has been clearly demonstrated (16,27,46) and the similarities in fine structure between the myoepithelial elements of the different glands suggest that they all are contractile cells.In studies seeking the elements basic to all intracellular contractile systems, the organization of every type of contractile cell should be considered. In this respect, striated muscle has been investigated intensively and some progress is now being made in elucidating the structure and function of smooth muscle (21, 34), but for lack of information or from oversight the myoepithelial cell has often 551

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Section: Introductionmentioning

confidence: 99%

Fine Structure of the Myoepithelium of the Eccrine Sweat Glands of Man

Ellis

1965

The Journal of Cell Biology

114

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“…In the field of dermatology, transmission electron microscopic studies have frequently been made on the axillary apocrine gland, as one of the accessory organs of the skin. As a result, the presence of secretory granules in the secretory cells and the mechanism of formation ofthese granules have been revealed (1)(2)(3)(4)(5).…”

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Scanning Electron Microscopic Study of the Human Axillary Apocrine Glands

Inoue

1979

The Journal of Dermatology

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The human axillary apocrine glands were observed by scanning electron microscopy. The axillary apocrine glands revealed three types of apocrine secretion: macroapocine, microapocrine and intermediate apocrine.In the macroapocrine type of secretion, a round projection, which lacked microvilli bulged up from the surface of the secretory cell. In the microapocrine type, the tips of microvilli which covered the large apocrine protrude were expanded and separated. In the intermediate apocrine type, several secretory protrubrances were formed at the luminal portion of the cell. Each protrubrance was composed of several swollen microvilli united. Small round pores were observed on the luminal plasma membrane. They seemed to represent the state of eccrine secretion, but nothing definite was learned about their nature. Some secretory cells had the luminal plasma membrane ruptured. They might not indicated a state of holocrine secretion, but were assumed to exhibit a deciduous phenomenon in the metabolism of secretory cells. The cracked surfaces of secretory cells were observed to confirm the presence of nuclei and cell organelles.

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“…15) i.e., eccrine glands (KUROSUMI et al, 1960;ELLIS, 1965) and apocrine glands (TAKAHASHI, 1957;KUROSUMI et al, 1959;YAMADA, 1960;BELL, 1974), and also in the lacrimal gland (SCOTT and PEASE, 1959;LEESON, 1960), salivary gland (TAKAHASHI, 1958 a;SCOTT and PEASE, 1959;TANDLER, 1965;TAMARIN, 1966) and mammary gland (LANGER and HUHN, 1958;TAKAHASHI, 1958 a;HAGUENAU, 1959;HOLLMANN, 1959; BARGMANN and KNOOP, 1959; BARGMANN et al, 1961;KUROSUMI et al, 1968 On the contrary, scanning electron microscopy can demonstrate the three-dimensional structure of cells and tissues in a wide range of magnification.…”

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confidence: 99%