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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, U.K. and Cambridge, USA : Blackwell Science Ltd
    Histopathology 33 (1998), S. 0 
    ISSN: 1365-2559
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Inflammation research 23 (1988), S. 283-285 
    ISSN: 1420-908X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Pentacaine was found to prevent the development of acute haemorrhagic lesions induced by ethanol in rats in a dose-dependent way. Electron microscopy in the untreated group showed extensive disruption of the surface epithelium and deep necrosis of the mucosa after ethanol exposure. Degranulation or even complete destruction of mast cells was observed. The microvasculature exhibited several signs of derangement. After pentacaine treatment, these signs were absent and no degranulation of mucosal mast cells was observed. The mast cell-mediated effect of pentacaine appears to be only one component of its gastroprotective action.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Histochemistry and cell biology 49 (1976), S. 327-335 
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The influence of starving on the activity of enzymes of the rat gastric mucosa was investigated by selected histochemical methods. Beside the conventional methods of enzymatic histochemistry the technique of semipermeable membranes was used in the proof of lysosomal enzymes. Dehydrogenases were proved in aqueous and also in gel media with PMS. During the starvation in the parietal cells a marked increase took place in the activity of acid phosphatase, E-600 resistant esterase, less in β-glucuronidase. High activity of the lysosomal enzymes in macrophages did not change during starvation. Nor did any changes took place in the activity of alkaline phosphatase in the endothelium of the capillaries. The chief cells in the control and starving animals, in contrast to the human gastric mucosa, did not contain any non-specific esterase. Concerning dehydrogenase, parietal cells with a different activity of these enzymes were observed both in starved and control animals. In the rat gastric mucosa starving induced changes in the activity of the enzymes which mark important organelles of the cells. Thus it is possible to consider the observed histochemical changes as a functional manifestation of morphological damage of cellular structures which are affected during starvation.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Histochemistry and cell biology 49 (1976), S. 315-325 
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The ultrastructure and certain cytochemical parameters of endocrine cells of the rat gastric mucosa during 168 h of fasting were investigated. To some of the fasting animals peroral food or alcohol was administered before decapitation. The EC (enterochromaffin cells) the ECL (enterochromaffin-like cells), D1 cells, AL (A-like cells) and G cells were identified by means of electron microscopy. Only the EC, ECL, and G cells could be identified by means of light microscopy by an adequate histochemical technique. The ultrastructural picture of the ECL and of the EC cells did not change markedly during the fasting. In the D1 cells there occurred an agglomeration of secretory granules. Some of them disintegrated and disappeared. In the AL cells an agglomeration of granules during the fasting was also observed. Granules engulfed in lysosomes were often found. The participation of lysosomes in the degradation of granules during the fasting was more marked in the AL cells than in the G cells. The participation of lysosomes was questionable in the EC and D1 cells, and in the ECL cells no lysosomes were observed. In contradistinction to the G cells of the non-fasting animals, where more than one half of the gastrin granules were “empty”, the G cells during the fasting were filled with agglomerated dense granules and contained lysosomes with fragments of engulfed secretory granules. Following the administration of food (Larsen's diet) 3 h before sacrificing the dissolution of the content of granules with well preserved membranes was observed (emiocytosis did not take place). The administration of food did not lead to changes in the ultrastructural appearance of the EC cells. The peroral administration of alcohol did not lead to any changes in the ultrastructural appearance of the AL and G cells.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Histochemistry and cell biology 59 (1978), S. 129-139 
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In the present study histochemical parameters of the rat gastric endocrine cells were followed up in the course of 24-h autolysis, and their ultrastructure was studied during autolysis lasting for 60 min. The autolysis occurred at 37°C. In the light microscope, with the histochemical methods applied, only EC, ECL and G cells could be identified during the one-hour autolysis. With the autolysis proceeding for 6 and 12 h, only argyrophil method according to Grimelius (1968) enabled visualization of gastric argyrophilic cells. After 24 h of autolysis, none of the methods applied (not even the Grimelius method) proved to be adequate for successful demonstration of the gastric endocrine cells. In the course of 60-min autolysis, electron microscopic examination provided identification of the EC, ECL, AL, D1, and G cells with the characteristical ultrastructural appearance of granules. The granules of the endocrine cells (G cells included) were found to be considerably resistant to autolysis. The effect of 60-min autolysis did not induce granule “emiocytosis” or dissolution of granule content. Autolysis exceeding five minutes resulted in damage of the mitochondria of different degrees and in dilatation of the profiles of endoplasmic reticulum (particularly in G and AL cells). The results obtained in the present study demonstrate the feasibility of in vitro experimental stimulation since the endocrine granules have proved to be resistant to the effects of simultaneously developing autolysis.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Anatomy and embryology 201 (2000), S. 51-61 
    ISSN: 1432-0568
    Keywords: Key words Female prostate (Skene gland) ; Ultrastructure ; Secretory (luminal) cells ; Basal (reserve) cells ; Intermediary cells
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  The predominant cells of female prostatic glands lining their lumen were found to be tall cylindrical secretory cells with short stubby microvilli, protuberances of the apical cytoplasm, and with bleb formation. Abundant secretory vacuoles and granules, rough endoplasmic reticulum, developed Golgi complexes and numerous mitochondria are characteristic of their active secretory configuration with apocrine (apical blebs) and merocrine (secretory vacuoles and granules) type of secretion. Basal (reserve) cells were seen to be located between the secretory (luminal) cells and the basement membrane. Their ground cytoplasm is dense with rough endoplasmic reticulum and mitochondria. Their nuclei, unlike those of secretory cells, possess more peripheral condensed chromatin, denser dispersed chromatin and sporadic nucleoli. Besides the two basic types of mature prostatic cells intermediary cells were also seen, located between the basal and secretory cells or in their close vicinity. Their cytoplasm exhibits numerous profiles of rough endoplasmic reticulum and free ribosomes. Secretory vacuoles and granules were mostly practically absent (type 1 intermediary cells) so that they resembled basal (reserve) cells. In some of them, however, as in secretory cells, such secretory elements do gradually appear (type 2 intermediary cells). The finding of intermediary cells in the lining of prostatic glands supports the role of basal (reserve) cells in the renewal of cells in glands of the female prostate. The first ultrastructural analysis of the normal female prostate performed by transmission electron microscopy showed that, as in the postpubertal male, the prostatic glands in the adult female display mature secretory and basal cells. The results of the presented study further corroborate the contemporary concept of the female prostate as a functional genitourinary organ.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    International urology and nephrology 16 (1984), S. 301-309 
    ISSN: 1573-2584
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The cellular component of the fluid of female urethral expulsions was analysed in two healthy women (37-year-old multipara and 27-year-old nullipara) on days 1, 10, 12, 14, 26 and 27 of their menstrual cycle. Transmission and scanning electron microscopy were used to determine standard values of uroepithelial squamous cells of the fluid of female urethral expulsions on different days of the menstrual cycle. In agreement with the known changes of these cells found in cytological smears during the cycle, electron microscopy confirmed characteristic changes in the appearance of the fine cell structure and the space configuration of the squamous cells. Changes in the desmosomal junctions among squamous cells during the cycle were found. Striking adherence of bacteria and mucosubstances to the squamous cell surfaces were observed in the first half of the menstrual cycle and at the time of ovulation.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1573-2584
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Data on the amount of uroepithelial squamous cells released into the fluid of urethral expulsions were obtained in a 37-year-old multipara by daily five consecutive repeated applications of the digital stimulation technique, carried out over the period of one and a half of her menstrual cycle. During the secretory phase of the cycle the rate of the cellular component was far higher than during the proliferative phase. These quantitative biometrically analysed data provide a complementary picture to the qualitative cytological changes of uroepithelial squamous cells occurring during the menstrual cycle that have been reported so far.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1573-6865
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Mouse monoclonal anti-urine protein 1 antibody and the biotin-streptavid in-peroxidase technique were used for the immunohistochemical demonstra tion of human protein 1 in prostatic tissue of both sexes. In the female prostate (Skene's gland), like the male prostate, high expression of human protein 1 was observed on the luminal surface and in the apical cytoplasm of secretory cells of prostatic glands, as well as on the luminal surface of the epithelium of the large ducts of the female prostate and urethra. Expression was also found in the membranes of secretory and basal cells of the glands, in membranes of the urethral uroepithelium and of the female prostate ducts, in the content of glands and ducts, as well as in vascular endothelium and smooth muscle. Human protein 1 (urine protein 1) expression in the secretory cells of the male and female prostate and its incorporation into the surface of cells lining the lumina of the female urethroprostatic complex is indicati ve not only of the secretory role of protein 1 but also of its potential protective properties operative in shielding the uroepithelium from the aggressive urinary environment. All genito-urinary tissue, and especially the female prostate, were found to be a potential source of urine protein 1 (human protein 1), refuting the notion held so far that it is exclusively the genito-urinary prostatic tissue of the male that participates in its production. The corresponding immunohistochemical distribution of human protein 1 in the same structures of the male and female prostate provides yet another analogous functional-morphological parameter of prostatic tissue in both sexes and further evidence supporting the non-vestigial concept of the prostate in the female.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1573-6865
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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