�ber die Ultrastruktur der Geschmacksknospen

Nemetschek-Gansler, H.; Ferner, Helmut

doi:10.1007/bf00339445

Cited by 58 publications

(9 citation statements)

References 6 publications

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“…The type I and the type II cells in this study correspond in most respects to the dark and the light cells respectively which have previously been reported in the rat (FARBMAN, 1965a, b;UGA, 1969) and the rabbit (DE LORENZO, 1958;NEMETSCHEK-GANSLER and FERNER, 1964;MURRAY and MURRAY, 1967). In the vallate bud the type I cell is characterized by the presence of dense round granules in the apical cytoplasm.…”

Section: Discussionsupporting

confidence: 86%

“…These findings indicate that the dense granules are secretory precursors of the dense substance in the pore. This was suggested by some previous workers (TRUJILLO-CENOZ, 1957;NEMETSCHEK-GANSLER and FERNER, 1964;MURRAY and MURRAY, 1967;SCALZI, 1967), though they did not demonstrate the granules being discharged into the pore. The identity of the granule substance in the cell and the dense substance in the pore is supported by their common reaction to PA-SM and PA-TCH staining.…”

Section: Discussionmentioning

confidence: 59%

“…The ultrastructure of the mammalian taste buds was previously studied in rabbits (ENGSTROM and RYTZNER, 1956;TRUJILLO-CENOZ, 1957;DE LORENZO, 1958;NEMETSCHEK-GANSLER and FERNER, 1964;SCALZI, 1967;MURRAY and MURRAY, 1967;MURRAY, MURRAY and FUJIMOTO, 1969;FUJIMOTO and MURRAY, 1970), rats (GRAY and WATKINS, 1965;FARBMAN, 1965a, b;UGA, 1969), guinea pigs (SPOENDLIN, 1970), monkeys (MURRAY and MURRAY, 1960), and men (GRAZIADEI, 1969;MATTHEWS and MARTIN, 1971;TAKEDA, 1972). These studies have shown disagreement with regard to their cellular composition and the function of the individual cells.…”

mentioning

confidence: 99%

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Fine Structure of Taste Buds in the Rat

Takeda

Hoshino

1975

Arch. Histol. Jap., Arch. Histol. Jpn

148

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Summary.The taste buds of rat circumvallate papillae contain three distinct types of cells. The type I (dark) cell is characterized by the presence of dense round granules, which are precursor to the dense substance of the taste pore. The granules are discharged into the pore by exocytosis.The type II (light) cell is filled with numerous vesicles and smooth-surfaced endoplasmic reticulum. The type III cell contains in its basal cytoplasm characteristic dark-cored vesicles and masses of clear vesicles, and makes synapse-like contacts with nerve fibers.The fine structure of foliate buds corresponds to that of circumvallate papillae, while fungiform buds differ in their apical regions.In the latter the pore is filled with vesicles alone, and the type I cell contains rod-shaped granules of moderate density.When polysaccharides were examined by means of the periodic acid-silver methenamine and the periodic acid-thiocarbohydrazide methods, slightly positive reactions were found on the dense granules of the type I cell and the dense substance in the pore, whereas the membranes of the pore vesicles, apical cytoplasmic processes and cytoplasmic vesicles in type II cells showed intense reactions.The ultrastructure of the mammalian taste buds was previously studied in rabbits (ENGSTROM and RYTZNER, 1956;TRUJILLO-CENOZ, 1957;DE LORENZO, 1958;NEMETSCHEK-GANSLER and FERNER, 1964;SCALZI, 1967;MURRAY and MURRAY, 1967; MURRAY, MURRAY and FUJIMOTO, 1969;FUJIMOTO and MURRAY, 1970), rats (GRAY and WATKINS, 1965; FARBMAN, 1965a, b;UGA, 1969), guinea pigs (SPOENDLIN, 1970), monkeys (MURRAY and MURRAY, 1960), and men (GRAZIADEI, 1969;MATTHEWS and MARTIN, 1971;TAKEDA, 1972). These studies have shown disagreement with regard to their cellular composition and the function of the individual cells. In particular, it remains to be established what cell type should be designated as the gustatory receptor. FARBMAN (1965a, b) distinguished the taste buds in rat fungiform papillae into four cell types which were called the peripheral, basal, type I (dark) and type II (light) cells. He considered the type I cell as the gustatory receptor.On the other hand, UGA (1969) who examined the rat circumvallate papillae, divided taste bud cells into two types, the light cells and the dark cells. He regarded the light cells as the gustatory element which is synaptically in contact with nerves. MURRAY, MURRAY and FUJIMOTO (1969) reported the third cell type in addition to the dark and the light ones. The cells of this type contained an aggregation of vesicles of a type generally found in synaptic regions in the basal portion of the cytoplasm, and they regarded this type as a gustatory receptor.The three primary areas of the tongue in mammals where the taste buds are commonly found are those of the circumvallate, foliate and fungiform papillae. In the rat tongue, the fungiform papillae are innervated by the chorda tympani nerve, whereas the circumvallate papillae and the posterior folds of the foliate papillae are 395

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Section: Discussionsupporting

confidence: 86%

Section: Discussionmentioning

confidence: 59%

mentioning

confidence: 99%

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Fine Structure of Taste Buds in the Rat

Takeda

Hoshino

1975

Arch. Histol. Jap., Arch. Histol. Jpn

148

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“…In mammalian taste buds, it was suggested that the dense granules were formed within the Golgi apparatus (SCALZI, 1967;TAKEDA and HOSHINO, 1975), and represented the secretory precursors of the dense substances in the taste pore (TRUJILLO-CENOZ, 1957;NEMETSCHEK-GANSLER and FERNER, 1964;MURRAY and MURRAY, 1967;SCALZI, 1967;TAKEDA and HOSHINO, 1975). SCALZI (1967) reported that the dense substance found in the taste pore of the rabbit was neutral mucopolysaccharide.…”

Section: Discussionmentioning

confidence: 99%

Ultrastructural and histochemical studies on the taste buds in some reptiles.

Uchida

1980

Arch. Histol. Jap., Arch. Histol. Jpn

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“…Although the fine structures of the mammalian taste buds have been described by a number of authors (ENGSTROM and RYTZNER, 1956;TRUJILLO-CENOZ, 1957;DE LORENZO, 1958;MURRAY and MURRAY, 1960;NEMETSCHEK-GANSLER and FERNER, 1964;FARBMAN, 1965;GRAY and WATKINS, 1965;SCALZI, 1967;JEPPSSON, 1969;MURRAY, MURRAY and FUJIMOTO, 1969;UGA, 1969;TAKEDA, 1972;MURRAY, 1973;TAKEDA and HOSHINO, 1975), there remain unsettled problems concerning the innervation of taste buds. MURRAY, MURRAY and FUJIMOTO (1969) reported typical afferent synaptic contacts between the type III cells and the nerves in the rabbit taste buds.…”

Section: Discussionmentioning

confidence: 99%

An Electron Microscopic Study on the Innervation in the Taste Buds of the Mouse Circumvallate Papillae

Takeda

1976

Arch. Histol. Jap., Arch. Histol. Jpn

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Summary.Taste buds of the mouse circumvallate papillae were studied by electron microscopy to elucidate the innervation involving the adrenergic nerve supply. Typical afferent synaptic contacts, with increased density of the membranes and aggregations of synaptic vesicles in the cytoplasm adjacent to the nerve endings, were demonstrated between the type III cells and the nerve endings.Along the regions of contact between the type II cells and the nerve endings, cisternae of endoplasmic reticulum were often seen beneath the cell membrane, and the nerve endings contained relatively many synaptic-sized vesicles.Such an innervation seems to be efferent in nature. For the detection of the adrenergic nerve supply, 5-hydroxydopamine (5-OH-DA) was injected after pretreatment with L-DOPA and nialamide. The mice showed numerous adrenergic nerve fibers in the connective tissue underlying the taste buds. On very few occasions, the adrenergic nerves penetrated the basal lamina of the taste buds and came into contact with the bud cells. Some adrenergic nerves were distributed among the epithelial cells around the taste buds. The reaction product from acetylcholine esterase activity was found around the adrenergic nerve fibers labeled with 5-OH-DA.Although the fine structures of the mammalian taste buds have been described by a number of authors (ENGSTROM and

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�ber die Ultrastruktur der Geschmacksknospen

Cited by 58 publications

References 6 publications

Fine Structure of Taste Buds in the Rat

Fine Structure of Taste Buds in the Rat

Ultrastructural and histochemical studies on the taste buds in some reptiles.

An Electron Microscopic Study on the Innervation in the Taste Buds of the Mouse Circumvallate Papillae

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