Trícia Cristine Kommers

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One hundred nineteen individuals classified as White, living in different localities of the Brazilian state of Rio Grande do Sul, were studied in relation to the HVS-I region of the mitochondrial DNA (mtDNA). The male fraction of the sample (N = 74) was also tested for seven Y-chromosome polymorphisms. In a specific population (Veranópolis), a city(More)
A sample of 255 Brazilian males from Rio Grande do Sul (RS), the Brazilian southernmost state, was typed for 17 Y-STR loci (DYS19, DYS389I, DYS389II, DYS390, DYS391, DYS392, DYS393, DYS437, DYS438, DYS439, DYS448, DYS456, DYS458, DYS635, YGATA_H4.1 and DYS385ab). A total of 247 haplotypes were identified, of which 239 were unique and eight were found in two(More)
In this study we investigated the effects of methylmalonic acid (MMA) and propionic acid (PA) on the phosphorylation of cytoskeletal proteins of cerebral cortex of rats. Slices of tissue were incubated with 32P-orthophosphate in the presence or absence of glutamate, MMA, PA and ionotropic or metabotropic glutamate receptor agonists. The cytoskeletal(More)
In previous work we showed that phosphorylation of glial fibrillary acidic protein (GFAP), an astrocyte marker, is increased by glutamate in hippocampal slices from immature rats via a type II metabotropic receptor. In the present work we show that glutamate also stimulates GFAP phosphorylation in microslices prepared from immature cerebellar cortex, but by(More)
In a previous study we showed that phosphorylation of the astrocytic marker glial fibrillary acidic protein (GFAP) in hippocampal slices from immature rats (P12-P16) is regulated by a metabotropic glutamate receptor (mGluR). The subtypes of these receptors are divided into three groups and exhibit two distinct transduction signals: activation of(More)
A sample of 203 Brazilian males from Rio Grande do Sul (RS), the Brazilian southernmost state, was typed for 11 Y-STR markers (DYS19, DYS389I/II, DYS390, DYS391, DYS392, DYS393, DYS385, DYS437, DYS438, and DYS439). We also typed 42 individuals from two South Amerindian tribes (Kaingang and Guarani) to use the data as parental Amerindian contribution to our(More)
Phosphorylation of glial fibrillary acidic protein (GFAP) in slices from immature rats is stimulated by glutamate via a group II metabotropic glutamate receptor (mGluR II) and by absence of external Ca2+ in reactions that are not additive (Wofchuk and Rodnight, Neurochem. Int. 24:517–523, 1994). These observations suggested that glutamate, via an mGluR,(More)
The effect of glutamate and lack of external Ca2+ on the phosphorylation of the astrocyte cell marker glial fibrillary acidic protein (GFAP) was studied in slices of hippocampus and thoracic spinal cord from immature (P12-16) rats. Confirming previous work with immature hippocampal slices (Wofchuk, S.T. and Rodnight, R., Neurochem. Int., 24 (1994) 517-523;(More)
OBJECTIVE To investigate the evolutionary and demographic history of the Gaucho, a distinct population of southern Brazil, relating it to their culture, to assess possible parallel continuity. METHODS Six binary polymorphisms, an Alu insertion polymorphism (YAP) and 12 short tandem repeat loci in the non-recombining region of the Y-chromosome, as well as(More)