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Molecular maps of neural activity and quiescence

100%
Chaudhuri A., Zangenehpour S., Rahbar-Dehgan F., Ye F.
Acta Neurobiologiae Experimentalis
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2000
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vol. 60
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issue 3
403-410
EN
The rapid accumulation of inducible transcription factors (ITFs), such as c-Fos and Zif268, in activated neurons combined with histological methods that offer detection at the cellular level are key features that have led to their wide use in visualizing activated neurons. There are two major drawbacks of ITFs that limit their use in the CNS - cell-type expression specificity and stimulus-transcription coupling uncertainty. Recent technical advances in the field of molecular activity mapping now permit dual-labeling approaches that help resolve some of these ambiguities and identify neurons that are activated by different sensory stimuli. Furthermore, the recent identification of the robl/LC7-like gene, which shows immediate-early repression after stimulation, may have utility in functional mapping where it can be used to delineate quiescent neurons and serve as a complement to molecular activity markers.
2

Absence of acetycholinesterase-positive nerve structure in the superficial part of the pineal gland of adult albino rats

100%
Swiatkiewicz G.
Folia Biologica
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1996
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vol. 44
131-136
EN
Application of the histochemical method for testing acetylcholiesterase (AChE, EC 3.1.1.7) combined with silver impregnation of the nervous tissue showed the absence of AChE-positive nerve structures in the superficial part of the pineal gland in adult male albino rats. It was carried out at the level of the light miscroscope. If it is assumed that the test for the presence of AChE is a form of indirect conclusion concerning the cholinergic nature of given nerve structures, then in the case of the superficial innervation of the pineal gland, the outcome of the test is negative.
3

Recent environmental toxic effect in the Polish Copper Mining Territory on human reproduction. Part I. Response of the placenta to the chemical stress

75%
Zadrozna M.
Folia Biologica
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2003
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vol. 51
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issue 3-4
201-205
EN
collected from healthy non-smoking women living in the high polluted region, i.e. the Copper Mining Territory (CMT) and the 38 control placentas (C) obtained from little polluted eastern Carpathian regions. The placentas were studied by histochemical, immunohistochemical and morphometric methods. In CMT placentas a decrease in the cytochrome c oxidase and glucose-6-phosphate activities and the immunoreactivity of glutathione S-transferase pi in the villous syncytiotrophoblast and amniotic epithelium was noted. All CMT placentas showed abundance of mineral and fibrinoid deposits and of lipid droplets. This produced a compensatory increase in the mother-fetus exchange area due to excessive proliferation of placental villi which in turn decreased the intervillous space and thus the influx of indispensable maternal blood. Lately slight signs of increase in the cytochrome c oxidase activity accompanied by a noticeable decrease in number of the thinnest (most abundant) terminal villi is observed.
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