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  • 1
    Electronic Resource
    Electronic Resource
    Photoluminescence dependence on heterointerface for metalorganic chemical vapor deposition grown GaInNAs/GaAs quantum wells (2002)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 80 (2002), S. 962-964 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We investigate the effect of the sequence of gas flows at heterointerfaces on optical quality of GaInNAs/GaAs quantum wells grown by metalorganic chemical vapor deposition (MOCVD). We point out that the degradation mechanism of photoluminescence of GaInNAs grown by MOCVD method is categorized in two types. One is the formation of a GaNAs layer at the heterointerface which causes both increase of emission wavelength and degradation of crystal quality. The other is generation of nonradiative centers induced by incorporation of nitrogen (N). The insertion of a GaInAs layer to the GaInNAs/GaAs heterointerface is proposed to overcome these degradation mechanisms. A GaInAs intermediate layer is effective to suppress the GaNAs formation and to reduce the total GaInNAs thickness. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1448656
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  • 2
    Electronic Resource
    Electronic Resource
    Butyl Benzyl Phthalate, an Endocrine Disrupter, Inhibits Pulsatile Luteinizing Hormone Secretion Under an Insulin-Induced Hypoglycaemic State in Ovariectomized Rats (2002)
    Oxford, UK : Blackwell Science, Ltd
    Journal of neuroendocrinology 14 (2002), S. 0 
    Details
    ISSN: 1365-2826
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Butyl benzyl phthalate (BBP) and bisphenol A (BPA), termed endocrine disrupters, are known to mimic oestrogen in their actions, and therefore there is concern about their effect on reproductive functions. Since it is reported that the inhibitory action of oestrogen on the pulsatile secretion of luteinizing hormone (LH) is enhanced under insulin-induced hypoglycaemia, whether this also applies to BBP and BPA was examined in the present study. In adult ovariectomized (OVX) rats, the pulsatile LH secretion 24 h after subcutaneous injection of 10 mg BBP (BBP-treated), 10 mg BPA (BPA-treated) or 100 ng 17β-oestradiol (E2-treated), all of which were dissolved in sesame oil, was not changed significantly compared to that after the injection of sesame oil only. Furthermore, in oil-treated OVX rats, the pulsatile LH secretion immediately after intravenous injection of insulin (1.0 U) was not changed compared to that after saline injection. In BBP-treated OVX rats, the injection of insulin (1.0 U) significantly decreased the number of LH pulses as in E2-treated OVX rats. The injection of insulin did not significantly affect the amplitude of LH pulses in BBP-, BPA- and E2-treated OVX rats. The results indicate that the oestrogenic action of BBP is significantly enhanced by insulin-induced hypoglycaemia and thus the pulsatile LH secretion is inhibited. We suggest that weak oestrogenic endocrine disrupters may become harmful to reproductive functions even in adult female rats, if acting under a low energy state.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2826.2002.00804.x
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  • 3
    Electronic Resource
    Electronic Resource
    Double-stranded RNA activates RANTES gene transcription through co-operation of nuclear factor-κB and interferon regulatory factors in human airway epithelial cells (2004)
    Oxford, UK : Blackwell Science Ltd
    Clinical & experimental allergy 34 (2004), S. 0 
    Details
    ISSN: 1365-2222
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background Regulated on activation, normal T cells expressed and secreted (RANTES) is a member of the CC chemokine family and contributes to viral-induced airway inflammation including exacerbations of asthma. Double-stranded RNA (dsRNA) is known to be synthesized during replication of many viruses and a ligand of Toll-like receptor 3. We hypothesized that dsRNA may mimic viral infection and induce RANTES expression in airway epithelial cells.Objective We first confirmed that dsRNA up-regulated RANTES mRNA and protein synthesis in the airway epithelial cells. We next focused our studies on the transcriptional regulation of RANTES.Methods Airway epithelial cell line BEAS-2B and normal human bronchial epithelial cells were used in vitro study. Levels of RANTES mRNA and protein expression were determined with RT-PCR and ELISA. Mechanisms of transcriptional regulation were assessed by electrophoretic mobility shift assay and dual luciferase assay using RANTES promoter-luciferase reporter plasmids.Results Activation of nuclear factor-κB (NF-κB) was confirmed by nuclear protein binding to a DNA probe derived from the RANTES promoter. Activity of the RANTES promoter was increased by dsRNA. The stimulation with dsRNA was partially inhibited in plasmids mutated at either of the binding sites for NF-κB or IFN regulatory factors (IRFs). When both sites were mutated, the activation was totally abrogated.Conclusion These results imply that dsRNA activates NF-κB and IRFs and these transcription factors activate transcription of the RANTES promoter and its protein expression in airway epithelial cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2222.2004.1941.x
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  • 4
    Electronic Resource
    Electronic Resource
    Influenza virus A stimulates expression of eotaxin by nasal epithelial cells (2001)
    Oxford, UK : Blackwell Science, Ltd
    Clinical & experimental allergy 31 (2001), S. 0 
    Details
    ISSN: 1365-2222
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background Respiratory virus is one of the most common causes of airway inflammation, but its pathogenic mechanisms are not well understood. Eotaxin is a potent eosinophil chemoattractant and is a selective agonist for C-C chemokine receptor 3 (CCR3). Although it has recently been demonstrated that epithelial cells express eotaxin, both in vivo and in vitro, there are few data concerning the expression in viral infection.Objects We hypothesized that eotaxin may play an important role in attracting inflammatory cells into the airway after viral infection and analysed whether viral infection induces eotaxin in nasal epithelial cells in vitro.Methods Nasal epithelial cells obtained from polypectomy for nasal polyp were infected with influenza virus A (subtype H3N2). The cells and supernatants were collected 8, 24 and 48 h after infection. Eotaxin mRNA was analysed by RT-PCR. Eotaxin concentration in the supernatants was analysed by enzyme-linked immunosorbent assay. We also examined a blocking assay to analyse the intervention of pro-inflammatory cytokines, TNF-α and IL-1β in eotaxin production induced by influenza virus.Results The results showed that eotaxin was expressed constitutively in uninfected cells, but was up-regulated for both mRNA and protein levels in infected cells. Blocking experiments using anti-TNF-α and anti-IL-1β antibodies showed no effects of these agents on the level of eotaxin. In addition, UV-inactivated virus did not enhance the expression of eotaxin.Conclusions These results suggest that influenza virus A infection in nasal epithelial cells stimulates the expression of eotaxin, and may play an important role in the pathogenesis of airway inflammation by inducing eotaxin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2222.2001.01103.x
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  • 5
    Electronic Resource
    Electronic Resource
    Multiple fractures of primary molars caused by injuries to the chin: report of two cases (2000)
    Copenhagen : Munksgaard International Publishers
    Dental traumatology 16 (2000), S. 0 
    Details
    ISSN: 1600-0595
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract – Two cases of multiple fractures of the primary molars caused by injuries to the chin are presented. Clinical and radiographic examinations revealed a vertical fracture line in the maxillary and mandibular primary molars. Pulpotomy or pulpectomy treatment was performed on the affected teeth, which were then restored with preformed stainless steel crowns.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1034/j.1600-9657.2000.016001043.x
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  • 6
    Electronic Resource
    Electronic Resource
    Localization of tumour necrosis factor-α converting enzyme in normal human skin (2004)
    Oxford, UK : Blackwell Science Ltd
    Clinical and experimental dermatology 29 (2004), S. 0 
    Details
    ISSN: 1365-2230
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The tumour necrosis factor (TNF)-α converting enzyme (TACE) is a metalloproteinase-disintegrin that releases soluble TNF-α from cells by cleaving within the extracellular domain of membrane-bound pro-TNF-α. TACE knockout mice display a range of epithelial abnormalities. However, the localization of TACE in normal human skin is unclear. In this study, we examined the expression of TACE in normal skin by immunohistochemical analysis. The expression of TACE was seen throughout all layers of the epidermis, the hair follicles, eccrine ducts and glands, and sebaceous glands. There was also staining of blood vessels in the dermis. In particular, TACE was localized predominantly in mast cells, suggesting that these cells are an important source of TNF-α.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2230.2004.01455.x
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  • 7
    Electronic Resource
    Electronic Resource
    Increased antibody levels to desmogleins 1 and 3 after administration of carbamazepine (2001)
    Oxford, UK : Blackwell Science Ltd
    Clinical and experimental dermatology 26 (2001), S. 0 
    Details
    ISSN: 1365-2230
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Desmoglein (Dsg) 1 and Dsg3 are recognized as the autoantigens in pemphigus foliaceus and pemphigus vulgaris. Pemphigus-like syndromes have been reported to occur in individuals after exposure to a variety of drugs, but pemphigus caused by carbamazepine is not common. We found that anti-Dsg1 and anti-Dsg3 antibody titres were increased in three individuals administered carbamazepine. Antibody titres against Dsgs 1 and 3 were measured by enzyme-linked immunosorbent assay (ELISA). Of 42 serum samples (25 patients administered carbamazepine, eight patients administered valproic acid and nine healthy volunteers) tested by ELISA, three patients administered carbamazepine showed positive reactivity against both Dsg1 and Dsg3. The patient with the highest titre against Dsg1 and Dsg3 (the index values of anti-Dsg1 and anti-Dsg3 were 79.3 and 86.4, respectively) was a 23-year-old woman (Case 1). The other two patients with positive reactivity were a 5-year-old boy (Case 2) and a 65-year-old man (Case 3). In addition, indirect immunofluorescence study showed intercellular antibodies to the cell surface of the whole epidermis with a titre of 1 : 64 in Case 1 and 1 : 2 in Cases 2 and 3. However, no skin or mucosal involvement was found in any of these cases. There was no difference in the serum concentrations of carbamazepine between the three positive cases and the 22 negative cases of carbamazepine administration. From these facts, the lack of skin diseases may be explained by relatively low values of anti-Dsg 1 and 3 antibodies in Cases 2 and 3. However, it cannot be excluded that undefined exogenous and/or endogenous factors are involved in an outbreak of pemphigus. Furthermore, these findings might be helpful for preventing susceptible individuals from exposure to the suspect drugs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2230.2001.00854.x
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  • 8
    Electronic Resource
    Electronic Resource
    Eccrine syringofibroadenoma with diffuse plantar hyperkeratosis (2003)
    Oxford, UK : Blackwell Science Ltd
    British journal of dermatology 149 (2003), S. 0 
    Details
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2133.2003.05588.x
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  • 9
    Electronic Resource
    Electronic Resource
    Effect of activin on cell growth in primary cultures of guinea pig gastric epithelial cells (2000)
    Oxford, UK : Blackwell Science Ltd
    Alimentary pharmacology & therapeutics 14 (2000), S. 0 
    Details
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background: The effect of activin on differentiated cells is known to be different from that on undifferentiated cells. Cultured gastric epithelial cells in complete serum-free conditions grew into matured mucous cells after treatment with epidermal growth factor (EGF). Aim: To elucidate the effect of activin on the growth of differentiated and undifferentiated gastric mucosal cells. Methods: Cultured guinea pig gastric epithelial cells were prepared using the method of Ogihara et al. 1Synthesis of activin was analysed by Western blot using monoclonal anti-activin A antibody. Cell proliferation was assessed by counting the number of cells. Mucin production was assessed by histochemical study using periodic acid-Schiff (PAS) reaction. Results: Western blot analysis indicated that activin was synthesized in cultured guinea pig gastric mucosal cells. One hundred nanomolar EGF induced a 3-fold increase in cell count and the appearance of PAS-positive granules. Five nanograms activin per millilitre without EGF stimulated proliferation of the cells that showed almost negative PAS staining. When activin was added after treatment with 100 n m EGF for 24 h, cell proliferation induced by EGF was inhibited by activin at concentrations higher than 5 ng/mL. Conclusion: These results suggest that activin stimulates proliferation of undifferentiated cells and inhibits growth of differentiated cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2036.2000.014s1183.x
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  • 10
    Electronic Resource
    Electronic Resource
    Coexisting clear cell adenocarcinoma and squamous cell carcinoma arising from ovarian endometriosis (2000)
    Springer
    International journal of clinical oncology 5 (2000), S. 405-409 
    Details
    ISSN: 1437-7772
    Keywords: Key words Ovary ; Clear cell adenocarcinoma ; Squamous cell carcinoma ; Endometriosis ; Pathology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A case of clear cell adenocarcinoma and squamous cell carcinoma coexisting in the ovary is presented. These two malignancies were adjacent but were not admixed, and ovarian endometriosis was confirmed concurrently. The clear cell adenocarcinoma was contiguous to monolayered glandular cells with cytological and architectural atypia, while squamous metaplasia with cellular atypia was observed adjacent to the squamous cell carcinoma. We concluded that these two malignancies arose independently from ovarian endometriosis. To our knowledge, this is the first report of such a case.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00012071
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