Glial fibrillary acidic protein in the brain of the caecilian Typhlonectes natans (Amphibia, Gymnophiona): an immunocytochemical study

Naujoks-Manteuffel, Christiane; Meyer, Dietrich

doi:10.1007/pl00008806

Cited by 7 publications

(6 citation statements)

References 49 publications

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“…However, our study does not support the assumption that caecilians are more closely related to urodeles than to anurans on neuroanatomical grounds, as proposed in other studies (Naujoks-Manteuffel and Meyer, 1996). Actually, numerous aspects of the organization of the trigeminal, abducens, facial, and hypoglossal nuclei in the hindbrain illustrate considerable variations, due to the major morphological modifications that occur in caecilians (Wake, 1993).…”

Section: Discussioncontrasting

confidence: 69%

Localization of choline acetyltransferase (ChAT) immunoreactivity in the brain of a caecilian amphibian, Dermophis mexicanus (Amphibia: Gymnophiona)

González

López

Sánchez-Camacho

et al. 2002

J of Comparative Neurology

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The organization of the cholinergic system in the brain of anuran and urodele amphibians was recently studied, and significant differences were noted between both amphibian orders. However, comparable data are not available for the third order of amphibians, the limbless gymnophionans (caecilians). To further assess general and derived features of the cholinergic system in amphibians, we have investigated the distribution of choline acetyltransferase immunoreactive (ChAT-ir) cell bodies and fibers in the brain of the gymnophionan Dermophis mexicanus. This distribution showed particular features of gymnophionans such as the existence of a particularly large cholinergic population in the striatum, the presence of ChAT-ir cells in the mesencephalic tectum, and the organization of the cranial nerve motor nuclei. These peculiarities probably reflect major adaptations of gymnophionans to a fossorial habit. Comparison of our results with those in other vertebrates, including a segmental approach to correlate cell populations across species, shows that the general pattern of organization of cholinergic systems in vertebrates can be modified in certain species in response to adaptative processes that lead to morphological and behavioral modifications of members of a given class of vertebrates, as shown for gymnophionans.

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Section: Discussioncontrasting

confidence: 69%

Localization of choline acetyltransferase (ChAT) immunoreactivity in the brain of a caecilian amphibian, Dermophis mexicanus (Amphibia: Gymnophiona)

González

López

Sánchez-Camacho

et al. 2002

J of Comparative Neurology

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“…The nomenclature used in this study is based on the works of Northcutt and Kicliter (1980), Zilles et al (1981), Schmidt and Wake (1990), and Naujoks- Manteuffel and Meyer (1996). I. Beddomei is not listed in the ICUN or the Red Book in India, and it is not a protected species.…”

Section: Methodsmentioning

confidence: 99%

Distribution of gonadotropin-releasing hormone immunoreactivity in the brain ofIchthyophis beddomei (amphibia: gymnophiona)

et al. 1997

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From a comparative viewpoint, we have investigated the presence and neuroanatomical distribution of gonadotropin-releasing hormone (GnRH)-immunoreactive material in the brain of a gymnophione amphibian, Ichthyophis beddomei. Immunocytochemical analysis of the adult brain and terminal nerves in both sexes shows the presence of neurons and fibers containing mammalian GnRH (mGnRH)- and chicken GnRH-II (cGnRH-II)-like peptides. With respect to GnRH-immunoreactive material, there are two distinct neuronal systems in the brain: one containing mGnRH, which is located in the forebrain and terminal nerve, and the other containing cGnRH-II, which is restricted to the midbrain tegmentum. Basically, this distribution pattern parallels that of many species of anurans and a urodele. Whereas the presence of cGnRH-II-immunoreactive fibers in the dorsal pallium of L. beddomei is a feature in common with a urodele amphibian, the total absence of cGnRH-II-like material in the median eminence is unique to this species. It is suggested here that the distribution profile of GnRH-like material within the brain and terminal nerve of I. beddomei represents a primitive pattern.

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“…It is found in starshaped fibrous and protoplasmic astrocytes, Bergmann glia, periependymal radial glia, and ependymal radial glia or tanycytes (see Wasowicz et al, 1994;Wicht et al, 1994;Naujoks-Manteuffel and Meyer, 1996, for reviews). This protein is widely accepted as a reliable specific molecular marker for these cells .…”

mentioning

confidence: 98%

Astroglial cells in the central nervous system of the adult brown anole lizard, Anolis sagrei, revealed by intermediate filament immunohistochemistry

Lazzari

Franceschini

2005

Journal of Morphology

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We analyzed the distribution of intermediate filament molecular markers, glial fibrillary acidic protein (GFAP), and vimentin in the brain and spinal cord of the adult brown anole lizard, Anolis sagrei. The GFAP immunoreactivity is strong and the positive structures are basically represented by fibers of different lengths and thicknesses which are arranged in a regular radial pattern throughout the central nervous system. In the brain regions that have a thicker neural wall, the radial orientation is not so evident as in the thinner areas. These fibers emerge from radial ependymoglia (tanycytes) whose cell bodies are generally GFAP-immunopositive. The glial fibers give rise to endfeet that are apposed to the subpial surface and to blood vessel walls. In the spinal cord, the optic tectum and the lateroventral regions of the mesencephalon and medulla oblongata, star-shaped astrocytes coexist with radial structures. Vimentin-immunoreactive structures are absent in the brain and spinal cord. In A. sagrei the immunohistochemical response of the astroglial intermediate filaments appears typical of a mature astroglial cell lineage, since they fundamentally express GFAP immunoreactivity. A Western-blot analysis reveals a GFAP-positive single band, common to the different nervous areas. This immunohistochemical study shows that the star-shaped astrocytes have a different distribution in saurians and while the glial pattern of A. sagrei is more evolved than in urodeles it remains immature as compared with crocodilians, avians, and mammals. This condition suggests that reptiles represent a fundamental step in the phylogenetic evolution of the vertebrate glial cells.

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Glial fibrillary acidic protein in the brain of the caecilian Typhlonectes natans (Amphibia, Gymnophiona): an immunocytochemical study

Cited by 7 publications

References 49 publications

Localization of choline acetyltransferase (ChAT) immunoreactivity in the brain of a caecilian amphibian, Dermophis mexicanus (Amphibia: Gymnophiona)

Localization of choline acetyltransferase (ChAT) immunoreactivity in the brain of a caecilian amphibian, Dermophis mexicanus (Amphibia: Gymnophiona)

Distribution of gonadotropin-releasing hormone immunoreactivity in the brain ofIchthyophis beddomei (amphibia: gymnophiona)

Astroglial cells in the central nervous system of the adult brown anole lizard, Anolis sagrei, revealed by intermediate filament immunohistochemistry

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