PURPOSE: When Managing metastatic bladder tumors, to overcome the resistance mechanism of cisplatin is a main problem to be solved. The objective is to confirm the changes of general and ultrastructural morph ology with the induction of cisplatin resistance from the bladder cell line. MATERIALS AND METHODS: The samples of this investigation are 2ng/ml-cisplatin resistant human bladder cell lines T24R2 established by SNUH Urology and the drug resistant bladder cell lines T24 was obtained from ATCC, as a control group. We cultured the resistant cell line on the slide and observed it using light microscopy to see the general morphology. For the ultrastructural morphology, we fixed cultured cells, made an epon block, sliced an ultrathin section and observed it using H-71000 EM. RESULTS: Under light microscopy, the cytoplasm of the resistant cell line shows a plumper pattern than that of the parent cell. Under electronmicroscopy, the chromatin of the resistant cell line has a relatively finely dispersed chromatin pattern when compared to the parent cell line, which shows a coarse and aggregated chromatin pattern. Within the cytoplasm, the mitochondrial volume, dilated rough endoplasmic reticulum, polyribosomes and ribosomes are moderately increased in the resistant cell line when compared to the parent cell line. In particular, we found a great amount of double membrane vesicle near the cell surface and pinocytic vesicles on the surface, which are seldom observed within the parent cells. CONCLUSIONS: We concluded that the cisplatin resistant human bladder cell lines (T24R2) underwent a morphological change with the induction of cisplatin resistance, and we hypothesize that the resistant cell's ultrastructure, which shows morphological change, will be involved in the drug resistance mechanism. Regarding this matter, further research will be needed.
Cell Line* ; Cells, Cultured ; Chromatin ; Cisplatin* ; Cytoplasm ; Drug Resistance ; Endoplasmic Reticulum, Rough ; Humans ; Membranes ; Microscopy ; Mitochondrial Size ; Parents ; Polyribosomes ; Ribosomes ; Urinary Bladder Neoplasms ; Urinary Bladder* ; Urology

Liver tissuses obtained from 5 human fetuses between 11 weeks and 23 weeks of gestation during the high activity of hepatic hemopoiesis were observed with transmission electron microscope using continuous series of thin sections. The objective of present study was to evaluate ultrastructures of megakaryopoietic cells, the migration of extravascular megakaryocyte into the sinusoidal lumen and the relevence between a migrated megakaryocyte and a Kupffer cell. Immature megakaryocytes were usually observed between growing hepatic laminae and within hepatic sinusoids. A megakaryoblast contained numerous polyribosomes, rather large mitochondria, short tubular elements of rough endoplasmic reticulum and small granules. Moreover, demarcation tubules and a few small specific granules were observed in immature megakaryocytes. The nucleus was mononuclear but frequently indented. With maturation, the nuclei were multilobulated. In the cytoplasm, in contrast to the decrease in polyribosomes and rough endoplasmic reticulum, the numerous specific granules and well -developed demarcation membrane system were predominant. Thereafter cytoplasmic zonation was observed clearly in maturing and mature megakaryocytes. Some megakaryocytes passed through the sinusoidal lining epithelium and into the hepatic sinusoids. The cell to cell interaction was often found as adhesion between migrated megakaryocyte and Kupffer cell, and erythroblasts within megakaryocyte (emperipolesis). These results suggest that intravascular megakaryopoiesis in addition to extravascular megakaryopoiesis occurs to produce platelet during the human fetal liver.
Blood Platelets ; Cell Communication ; Cytoplasm ; Emperipolesis ; Endoplasmic Reticulum, Rough ; Epithelium ; Erythroblasts ; Fetus* ; Humans* ; Liver ; Megakaryocyte Progenitor Cells ; Megakaryocytes* ; Membranes ; Mitochondria ; Polyribosomes ; Pregnancy ; Thrombopoiesis

We report herein a case of lymphomatoid papulosis in a 23-year-old female who had recurrent erythematous pinhead to pea sized papules and nodules on the both inner thighs and forearms for 4 years. Some lesions showed central hemorrhagic necrosis or scale formation. Individual lesions persisted for several months and showed spontaneous regression leaving pigmentation or depigmented atrophic scar. Histopathologically, there was marked cell infiltration, especially in the dermoepiderrnal junction and perivascular area. Infiltraled cells consisted of sorne ncutrophils and numerous atypical cells that had variable sized and irregular shaped nuclei. Electronmicroscopically, some atypical cells had cerebriform nuclei with marked peripheral condensation of chromatin and cytoplasm contained a few organelles, many polyribosomes and some dense bodies.
Chromatin ; Cicatrix ; Cytoplasm ; Female ; Forearm ; Humans ; Lymphomatoid Papulosis* ; Necrosis ; Organelles ; Peas ; Pigmentation ; Polyribosomes ; Thigh ; Young Adult

BACKGROUND: Trichomonas vaginalis is a pathogenic protozoa infecting human genitourinary tract. Metronidazole is currently the drug of choice to treat T. vaginalis infection. However, because of the side effects and the occurrence of resistant strains of metronidazole, it is needed to investigate alternatives. METHODS: The antiprotozoal effect of aquatic extract from Sophora flavescens on the growth and fine structure of T. vaginalis was examined by using trypan blue exclusion assay and electron microscopy. RESULTS: One hour after the addition of 4 mg/mL extract and half hour after the addition of 5 mg/mL showed antiprotozoal effect. One to two hours after the addition of 3 mg/mL extract, the movement of flagella and axostyle had disappeared, but death of the cells had not occurred until two hours after the addition. The fine structure of the cytoplasm was also changed half an hour to two hours after addition. The number of polyribosome decreased when that of single ribosomes in the cytoplasm increased. CONCLUSION: These results indicated that S. flavescens had the antiprotozoal effect on T. vaginalis by inhibition of cell multiplication as well as an impairment of protein synthesis.
Cell Proliferation ; Cytoplasm ; Flagella ; Humans ; Metronidazole ; Microscopy, Electron ; Polyribosomes ; Ribosomes ; Sophora* ; Trichomonas vaginalis* ; Trichomonas* ; Trypan Blue

BACKGROUND: Metronidazole has been known as the most effective drug for treatment of Trichomonas vaginalis-related diseases. However, it has been reported that metronidazole has adverse effects and incidence of metronidazole-resistant T. vaginalis (CDC085) has increased. Development of new drug, which is effective against metronidazole-resistant T. vaginalis and showing no adverse effects, has been required. METHODS: The purpose of this study was to investigate effects of various extracts from herbs such as Quisqualis indica, Gleditsia sinensis, Prunus armeniaca, Morus alba, Platycodon grandiflorum, Ailanthus altissima, Stemona japonica, Biota orientalis, Dryobalanops aromatica, and Cimicifuga heracleifolia on metronidazole resistant strain of T. vaginalis in vitro (CDC085). RESULTS: Anti-Trichomonas activities were observed in T. vaginalis treated with G. sinensis, P. armeniaca, and P. grandiflorum on the growth and fine structure of metronidazole resistant strain of T. vaginalis. Of the three standard extracts that showed the most effective anti-trichomonas activity, G. sinensis was the most effective. The inhibitory effects of fraction extracts of this drug were shown on the growth of T. vaginalis. The fine structure of the cytoplasm was changed after application of G. sinensis extract. The number of polyribosome and hydrogenosome decreased whereas the number of food vacuole and vacuole in the cytoplasm increased, compared with that of untreated control group. CONCLUSION: The results of our study indicate that G. sinensis may induce the inhibition of cell multiplication as well as impairment of protein synthesis of metronidazole resistant strain of T. vaginalis in vitro.
Ailanthus ; Cell Proliferation ; Cimicifuga ; Cytoplasm ; Dipterocarpaceae ; Gleditsia ; Incidence ; Metronidazole* ; Morus ; Platycodon ; Polyribosomes ; Prunus armeniaca ; Stemonaceae ; Thuja ; Trichomonas vaginalis* ; Trichomonas* ; Vacuoles

BACKGROUND: T. vaginalis is a pathogenic protozoa infecting genitourinary tract. Metronidazole is a drug of choice to treat T. vaginalis infection. However, because of appearance of metronidazole- resistant T. vaginalis, it is needed to develop an alternative drug. So, we evaluated the effects of various concentration of kalopanaxsaponin A against T. vaginalis. METHODS: The antiprotozoal effect of kalopanaxsaponin A on the growth and fine structure of T. vaginalis was examined by using trypan blue exclusion assay and electron microscopy. RESULTS: The viability test showed markedly decreased number of T. vaginalis, treated with increasing concentration of kalopanaxsaponin A. We evaluated the electron microscopic findings for antiprotozoan effects against T. vaginalis. SEM showed that in T. vaginalis treated with 4 microgram/mL for 1 hour, axostyle was shrinked and flagella began to disappear. With gradual increase of the concentration of kalopanaxsaponin A, destruction of cell membrane was getting more severe, and degenerative change was observed in T. vaginalis treated with 8 microgram/mL for 2 hours. TEM showed that in T. vaginalis treated with 4 microgram/mL for 2 hours, the vacuoles in cytoplasm were larger and hydrogenosomes were smaller than those in control group. The number of vacuole was increased, the nucleus was destroyed, the number of polyribosome and free ribosome was also decreased in trichomonads treated with kalopanaxsaponin A (8 microgram/mL), which indicated the occurrence of degenerative changes. CONCLUSION: These results indicated that kalopanaxsaponin A had the antiprotozoal effect on T. vaginalis by inhibition of cell multiplication as well as an impairment of protein synthesis.
Cell Membrane ; Cell Proliferation ; Cytoplasm ; Flagella ; Metronidazole ; Microscopy, Electron ; Polyribosomes ; Ribosomes ; Trichomonas vaginalis* ; Trichomonas* ; Trypan Blue ; Vacuoles

BACKGROUND: T. vaginalis is a pathogenic protozoa infecting genitourinary tract. Metronidazole is a drug of choice to treat T. vaginalis infection. However, because of appearance of metronidazole- resistant T. vaginalis, it is needed to develop an alternative drug. So, we evaluated the effects of various concentration of kalopanaxsaponin A against T. vaginalis. METHODS: The antiprotozoal effect of kalopanaxsaponin A on the growth and fine structure of T. vaginalis was examined by using trypan blue exclusion assay and electron microscopy. RESULTS: The viability test showed markedly decreased number of T. vaginalis, treated with increasing concentration of kalopanaxsaponin A. We evaluated the electron microscopic findings for antiprotozoan effects against T. vaginalis. SEM showed that in T. vaginalis treated with 4 microgram/mL for 1 hour, axostyle was shrinked and flagella began to disappear. With gradual increase of the concentration of kalopanaxsaponin A, destruction of cell membrane was getting more severe, and degenerative change was observed in T. vaginalis treated with 8 microgram/mL for 2 hours. TEM showed that in T. vaginalis treated with 4 microgram/mL for 2 hours, the vacuoles in cytoplasm were larger and hydrogenosomes were smaller than those in control group. The number of vacuole was increased, the nucleus was destroyed, the number of polyribosome and free ribosome was also decreased in trichomonads treated with kalopanaxsaponin A (8 microgram/mL), which indicated the occurrence of degenerative changes. CONCLUSION: These results indicated that kalopanaxsaponin A had the antiprotozoal effect on T. vaginalis by inhibition of cell multiplication as well as an impairment of protein synthesis.
Cell Membrane ; Cell Proliferation ; Cytoplasm ; Flagella ; Metronidazole ; Microscopy, Electron ; Polyribosomes ; Ribosomes ; Trichomonas vaginalis* ; Trichomonas* ; Trypan Blue ; Vacuoles

BACKGROUND: Metronidazole has been known as the most effective drug for treatment of Trichomonas vaginalis-related diseases. However, it has been reported that metronidazole has adverse effects and incidence of metronidazole-resistant T. vaginalis (CDC085) has increased. Development of new drug, which is effective against metronidazole-resistant T. vaginalis and showing no adverse effects, has been required. METHODS: The purpose of this study was to investigate effects of various extracts from herbs such as Quisqualis indica, Gleditsia sinensis, Prunus armeniaca, Morus alba, Platycodon grandiflorum, Ailanthus altissima, Stemona japonica, Biota orientalis, Dryobalanops aromatica, and Cimicifuga heracleifolia on metronidazole resistant strain of T. vaginalis in vitro (CDC085). RESULTS: Anti-Trichomonas activities were observed in T. vaginalis treated with G. sinensis, P. armeniaca, and P. grandiflorum on the growth and fine structure of metronidazole resistant strain of T. vaginalis. Of the three standard extracts that showed the most effective anti-trichomonas activity, G. sinensis was the most effective. The inhibitory effects of fraction extracts of this drug were shown on the growth of T. vaginalis. The fine structure of the cytoplasm was changed after application of G. sinensis extract. The number of polyribosome and hydrogenosome decreased whereas the number of food vacuole and vacuole in the cytoplasm increased, compared with that of untreated control group. CONCLUSION: The results of our study indicate that G. sinensis may induce the inhibition of cell multiplication as well as impairment of protein synthesis of metronidazole resistant strain of T. vaginalis in vitro.
Ailanthus ; Cell Proliferation ; Cimicifuga ; Cytoplasm ; Dipterocarpaceae ; Gleditsia ; Incidence ; Metronidazole* ; Morus ; Platycodon ; Polyribosomes ; Prunus armeniaca ; Stemonaceae ; Thuja ; Trichomonas vaginalis* ; Trichomonas* ; Vacuoles

Escherichia coli ; genetics ; metabolism ; Escherichia coli Proteins ; genetics ; Gene Knockout Techniques ; Hydrogen-Ion Concentration ; Peptide Initiation Factors ; genetics ; Polyribosomes ; metabolism ; Protein Biosynthesis ; Stress, Physiological

BACKGROUND: Hu syndrome, a neurological disorder, is characterized by the remote effect of small cell lung cancer on the neural degeneration. The suspicious effectors for this disease are anti-Hu autoantibodies or Hu-related CD8+ T lymphocytes. Interestingly, the same effectors have been suggested to act against tumor growth and this phenomenon may represent natural tumor immunity. For these diagnostic and therapeutic reasons, the demand for antibodies against Hu protein is rapidly growing. METHODS: Polyclonal and monoclonal antibodies were generated using recombinant HuR protein. Western blot analyses were performed to check the specificity of generated antibodies using various recombinant proteins and cell lysates. Extracellular stimuli for HuR expression had been searched and HuR-associated proteins were isolated from polysome lysates and then separated in a 2-dimensional gel. RESULTS: Polyclonal and monoclonal antibodies against HuR protein were generated and these antibodies showed HuR specificity. Antibodies were also useful to detect and immunoprecipitate endogenous HuR protein in Jurkat and BJAB. This report also revealed that TNF-alphatreatment in BJAB up-regulated HuR expression. Lastly, protein profile in HuR-associated mRNA- protein complexes was mapped by 2-dimensional gel electrophoresis. CONCLUSION: This study reported that new antibodies against HuR protein were successfully generated. Currently, project to develop a diagnostic kit is in process. Also, this report showed that TNF-alphaup-regulated HuR expression in BJAB and protein profile associated with HuR protein was mapped.
Antibodies ; Antibodies, Monoclonal ; Autoantibodies ; Blotting, Western ; Electrophoresis ; ELAV Proteins ; ELAV-Like Protein 1 ; Nervous System Diseases ; Ovarian Neoplasms* ; Polyribosomes ; Recombinant Proteins ; Sensitivity and Specificity ; Small Cell Lung Carcinoma ; T-Lymphocytes ; Tumor Necrosis Factor-alpha