INIBIBB   05455
INSTITUTO DE INVESTIGACIONES BIOQUIMICAS DE BAHIA BLANCA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
AUTOFLUORESCENT VARIETY OF ¦¡-QUARTZ (SIO2) IN ELECTRIC TISSUE
Autor/es:
BARRERA, F.1; PRADO FIGUEROA, M.1
Lugar:
B¨²zios, RJ, Brazil
Reunión:
Congreso; I IBRO/LARC CONGRESS OF NEUROSCIENCES OF LATIN AMERICA, CARIBBEAN AND IBERIAN PENINSULA; 2008
Institución organizadora:
IBRO/LARC Y SOC BRASILEIRA DE NEUROCIENCIA
Resumen:
C.04.019
The electric organs (EO) of Psammobatis extenta produce weak electrical discharges to the surrounding
environment. Its majority cells -electrocytes- derived from myoblasts have evolved and differential
independently, losing the contractile ability. In previous works we employed EDS-SEM and documented
the presence of aluminium and silicon in significant concentrations. Zinc, oxigen and cupper were also
localized. For Polarized Light Microscopy we could also identify specifically a microcrystalline variety of
SiO2: chalcedony. Now, using Epifluorescence Microscopy (Epi-fl) and Confocal Laser Scanning
Microscopy (LCSM) on EO subcellular extracts of P. extenta obtained for differential centrifugation we
identify that the chalcedony autofluorescent is distributed in all the subcellular fractions. Neuronal cell
death and synaptic terminal degeneration have been noted in the EO of this fishes (Fox et al., 1990 and
our observations). The crystalline form of this mineral of quartz could interact with the DNA of the
nucleus of the electrocyte and to intervene in processes of neuromuscular disorders. There is this the first
time that is demonstrated the presence of the autofluorescent chalcedony in EO using Epi-fl and LCSM.
Palavras-Chave: Electrocytes, Neurodegeneration, Silica
Apoio Financeiro: Supported by grants to Mar¨ªa Prado Figueroa, from the SGCyT, UNS ¨C Bah¨ªa Blanca,
Argentina.
501
The electric organs (EO) of Psammobatis extenta produce weak electrical discharges to the surrounding
environment. Its majority cells -electrocytes- derived from myoblasts have evolved and differential
independently, losing the contractile ability. In previous works we employed EDS-SEM and documented
the presence of aluminium and silicon in significant concentrations. Zinc, oxigen and cupper were also
localized. For Polarized Light Microscopy we could also identify specifically a microcrystalline variety of
SiO2: chalcedony. Now, using Epifluorescence Microscopy (Epi-fl) and Confocal Laser Scanning
Microscopy (LCSM) on EO subcellular extracts of P. extenta obtained for differential centrifugation we
identify that the chalcedony autofluorescent is distributed in all the subcellular fractions. Neuronal cell
death and synaptic terminal degeneration have been noted in the EO of this fishes (Fox et al., 1990 and
our observations). The crystalline form of this mineral of quartz could interact with the DNA of the
nucleus of the electrocyte and to intervene in processes of neuromuscular disorders. There is this the first
time that is demonstrated the presence of the autofluorescent chalcedony in EO using Epi-fl and LCSM.
Palavras-Chave: Electrocytes, Neurodegeneration, Silica
Apoio Financeiro: Supported by grants to Mar¨ªa Prado Figueroa, from the SGCyT, UNS ¨C Bah¨ªa Blanca,
Argentina.
501Psammobatis extenta produce weak electrical discharges to the surrounding
environment. Its majority cells -electrocytes- derived from myoblasts have evolved and differential
independently, losing the contractile ability. In previous works we employed EDS-SEM and documented
the presence of aluminium and silicon in significant concentrations. Zinc, oxigen and cupper were also
localized. For Polarized Light Microscopy we could also identify specifically a microcrystalline variety of
SiO2: chalcedony. Now, using Epifluorescence Microscopy (Epi-fl) and Confocal Laser Scanning
Microscopy (LCSM) on EO subcellular extracts of P. extenta obtained for differential centrifugation we
identify that the chalcedony autofluorescent is distributed in all the subcellular fractions. Neuronal cell
death and synaptic terminal degeneration have been noted in the EO of this fishes (Fox et al., 1990 and
our observations). The crystalline form of this mineral of quartz could interact with the DNA of the
nucleus of the electrocyte and to intervene in processes of neuromuscular disorders. There is this the first
time that is demonstrated the presence of the autofluorescent chalcedony in EO using Epi-fl and LCSM.
Palavras-Chave: Electrocytes, Neurodegeneration, Silica
Apoio Financeiro: Supported by grants to Mar¨ªa Prado Figueroa, from the SGCyT, UNS ¨C Bah¨ªa Blanca,
Argentina.
5012: chalcedony. Now, using Epifluorescence Microscopy (Epi-fl) and Confocal Laser Scanning
Microscopy (LCSM) on EO subcellular extracts of P. extenta obtained for differential centrifugation we
identify that the chalcedony autofluorescent is distributed in all the subcellular fractions. Neuronal cell
death and synaptic terminal degeneration have been noted in the EO of this fishes (Fox et al., 1990 and
our observations). The crystalline form of this mineral of quartz could interact with the DNA of the
nucleus of the electrocyte and to intervene in processes of neuromuscular disorders. There is this the first
time that is demonstrated the presence of the autofluorescent chalcedony in EO using Epi-fl and LCSM.
Palavras-Chave: Electrocytes, Neurodegeneration, Silica
Apoio Financeiro: Supported by grants to Mar¨ªa Prado Figueroa, from the SGCyT, UNS ¨C Bah¨ªa Blanca,
Argentina.
501P. extenta obtained for differential centrifugation we
identify that the chalcedony autofluorescent is distributed in all the subcellular fractions. Neuronal cell
death and synaptic terminal degeneration have been noted in the EO of this fishes (Fox et al., 1990 and
our observations). The crystalline form of this mineral of quartz could interact with the DNA of the
nucleus of the electrocyte and to intervene in processes of neuromuscular disorders. There is this the first
time that is demonstrated the presence of the autofluorescent chalcedony in EO using Epi-fl and LCSM.
Palavras-Chave: Electrocytes, Neurodegeneration, Silica
Apoio Financeiro: Supported by grants to Mar¨ªa Prado Figueroa, from the SGCyT, UNS ¨C Bah¨ªa Blanca,
Argentina.
501et al., 1990 and
our observations). The crystalline form of this mineral of quartz could interact with the DNA of the
nucleus of the electrocyte and to intervene in processes of neuromuscular disorders. There is this the first
time that is demonstrated the presence of the autofluorescent chalcedony in EO using Epi-fl and LCSM.
Palavras-Chave: Electrocytes, Neurodegeneration, Silica
Apoio Financeiro: Supported by grants to Mar¨ªa Prado Figueroa, from the SGCyT, UNS ¨C Bah¨ªa Blanca,
Argentina.
501: Electrocytes, Neurodegeneration, Silica
Apoio Financeiro: Supported by grants to Mar¨ªa Prado Figueroa, from the SGCyT, UNS ¨C Bah¨ªa Blanca,
Argentina.
501
501