共查询到20条相似文献,搜索用时 31 毫秒
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Aasia O. Rehman Cun-yu Wang 《International journal of oral science》2009,1(3):105-118
Aim To determine how SDF-1α/CXCR4 activates nuclear factor-kappa B (NF-κB) and promotes oral squamous cell carcinoma (OSCC) invasion.Methodology A lentivirus-based knockdown approach was utilized to deplete gene expression. NF-κB activation was evaluated by Western blot analysis and electrophoretic mobility shift (EMSA). Results We show that the activation of NF-κB by CXCR4 occurs through the Carma3/Bcl10/Maltl (CBM) complex in OSCC. We found that loss of components of the CBM complex in HNSCC can inhibit SDF-1α induced phosphorylation and degradation of IκBα, while TNFα induced IKK activation remains unchanged. Further, we identified a role for novel and atypical, but not classical, PKCs in activating IKK through CXCR4. Importantly, inhibition of the CBM complex leads to a significant decrease in SDF-1α mediated invasion of OSCC. Conclusion The CBM complex plays a critical role in CXCR4-induced NF-κB activation in OSCC. Targeting molecular components of the NF-κB signaling pathway may provide an important therapeutic opportunity in controlling the progression and metastasis of OSCC mediated by SDF-1α. 相似文献
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Youn Jung Kim Sung Ho Cha Ho Yun Lee Sun Kyu Lee Hee Yong Chung Joon Hyung Yeo Young Il Kim Seung Geun Yeo 《Clinical and experimental otorhinolaryngology》2014,7(1):7-12
Objectives
To assess innate and humoral immune responses in middle ear effusion of obese pediatric patients with otitis media with effusion (OME).Methods
We evaluated 219 children with OME, of whom 21 were obese and 198 were non-obese. We compared the expression in middle ear effusion of mRNAs encoding toll-like receptors (TLR) 2, 4, 5, and 9; nucleotide-binding oligomerization domains (NOD) 1 and 2; retinoic acid-inducible gene (RIG)-I; interleukins (IL)-6, -10, and -12; interferon (IFN)-γ; and tumor necrosis factor (TNF)-α mRNAs. We also compared the expression of immunoglobulins IgG, IgA, and IgM and the bacterial detection rate in the two groups.Results
TLR2-mediated expression of IL-6 mRNA, TLR4-mediated expression of IL-6 and IL-10 mRNA, TLR5-mediated expression of IL-6, IL-10, and TNF-α mRNA, TLR9-mediated expression of IL-6 mRNA, and NOD2-mediated expression of IL-6, IL-12, and TNF-α mRNA were significantly lower in obese than in non-obese children (P<0.05). However, concentrations of IgG, IgA, and IgM in middle ear effusion were lower in obese than in non-obese children, but none of these differences was significant (P>0.05).Conclusion
Mean body mass index was higher and pattern-recognition receptor-mediated cytokine mRNA expression was lower in obese than in non-obese children with OME. 相似文献5.
Shi-Nae Park Kyoung Ho Park Hyeog-Gi Choi Ji Hyun Shin Dong Hee Lee Ki Hong Chang Sang Won Yeo 《Clinical and experimental otorhinolaryngology》2010,3(1):18-23
Objectives
While other cytokines are known to be associated with otitis media with effusion (OME), the involvement of heat shock protein 70 (HSP70) in middle ear effusion (MEE) is unknown. This study was undertaken to investigate the possibility of there being a HSP70 expression in human MEE and to determine its potential role as a cytokine in OME.Methods
The levels of HSP70, tumor necrosis factor-alpha and interleukin-1beta were measured by enzyme-linked immunosorbent assay in the effusion of different groups of OME patient following collection of the MEE using our new collection system. The clinical characteristics of the OME patients and the MEE status were analyzed.Results
HSP70 was expressed in all the types of MEE. The mucous and seromucous effusions showed higher HSP70 levels than that of the serous effusion. The HSP70 level was correlated with the levels of tumor necrosis factor (TNF)-α and interleukin (IL)-1β in the effusions. The positive correlations between HSP70, TNF-α and IL-1β were statistically significant (P<0.05).Conclusion
The highly elevated level of HSP70 in the seromucous and mucous effusions implicates this protein in the chronicity of OME. 相似文献6.
Meng Z Zheng Y Liu S Wang K Kong X Tao Y Xu K Liu G 《Clinical and experimental otorhinolaryngology》2012,5(1):10-16
Objectives
The Tinnitus Handicap Inventory (THI) is a commonly used self-reporting tinnitus questionnaire. We undertook this study to determine the reliability and validity of the Chinese-Mandarin version of the Tinnitus Handicap Inventory (THI-CM) for measuring tinnitus-related handicaps.Methods
We tested the test-retest reliability, internal reliability, and construct validity of the THI-CM. Two-hundred patients seeking treatment for primary or secondary tinnitus in Southwest China were asked to complete THI-CM prior to clinical evaluation. Patients were evaluated by a clinician using standard methods, and 40 patients were asked to complete THI-CM a second time 14±3 days after the initial interview.Results
The test-retest reliability of THI-CM was high (Pearson correlation, 0.98), as was the internal reliability (Cronbach''s α, 0.93). Factor analysis indicated that THI-CM has a unifactorial structure.Conclusion
The THI-CM version is reliable. The total score in THI-CM can be used to measure tinnitus-related handicaps in Mandarin-speaking populations. 相似文献7.
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Objectives
Respiratory epithelial cells are the first site of interaction of allergens with the immune system. The aim of this study was to examine the effect of epithelial cells, which were stimulated with house dust mite (HDM) extracts, on the immune response of peripheral blood mononuclear cells (PBMCs).Methods
Primary nasal polyp epithelial cells were exposed to dermatophagoides pteronyssinus and dermatophagoides farina for 48 hr, and then the supernatant and cells were collected. After stimulation with HDM extract, the epithelial cells were co-cultured with PBMCs for 72 hr and then the supernatant was collected. We measured the interleukin (IL)-8 and granulocyte-macrophage colony stimulating factor to determine the activation of the epithelial cells. The tumor necrosis factor (TNF)-α, IL-5 and interferon-γ were measured to evaluate the interaction between the epithelial cells and the PBMCs. The mRNA expression of intercellular adhesion molecule 1 (ICAM-1) was assessed using the anti-ICAM-1 antibody.Results
The HDM extracts activated the nasal epithelial cells and enhanced the expression of ICAM-1 mRNA and cell membrane ICAM-1. When the activated epithelial cells were co-cultured with PBMCs, the PBMCs produced lager amounts of TNF-α and IL-5. However the cytokine production was not inhibited by pretreatment with ICAM-1 antibody.Conclusion
HDM allergens induce allergic inflammation by activating nasal epithelial cells, yet the interaction of the epitheila cells and the PBMCs may not be associated with an ICAM-1 medicated mechanism. 相似文献10.
Byung-Joo Lee Jae-Hwi Jeong Soo-Geun Wang Jin-Choon Lee Eui-Kyung Goh Hwal-Woong Kim 《Clinical and experimental otorhinolaryngology》2009,2(1):20-27
Objectives
The tension on a wound is one of the important factors that determine the degree of fibrosis and scar formation. We hypothesized that local botulinum toxin type A (Botox) induced paralysis of the musculature subjacent to a surgical wound with a skin defect would minimize the repetitive tensile forces on the surgical wound''s edges, and this will result in a decreased fibroplastic response and fibrosis of the wound.Methods
This is a prospective randomized experimental study. Two distinct surgical wounds were made to the dorsum of 15 adult rats, respectively. One of the 2 wounds was injected with Botox, and the other wound was used as a control, and this was done for all the rats'' wounds. We evaluated the wound size, the degree of fibrosis and inflammation, the blood vessel proliferation, the thickness of the wound and the expression of transforming growth factor (TGF)-β1 in the wounds.Results
There were significant differences of wound size at the 3rd and 4th week between the Botox and control groups (P<0.05). The Botox group showed less infiltration of inflammatory cells than the control group at the 2nd week (P<0.05). The Botox group showed a smaller number of fibroblasts and less fibrosis than the control group at the 4th week (P<0.05). The Botox group showed much strong collagen density than the control group at the 8th week (P<0.05). For the immunohistochemical staining, there was a lower transforming growth factor (TGF)-β1 expression in the Botox group than that of the control group at the 4th week (P<0.05).Conclusion
The wounds of the Botox-treated group showed a larger wound size, less infiltration of inflammatory cells and less fibrosis, a much greater amount of collagen and a lower expression of TGF-β1 than did the control group. Botox might be used to decrease the fibrosis of a surgical wound without damaging the epithelial growth in situations for which decreased fibrosis is necessary, such as for treating laryngeal, tracheal and nasal stenosis. 相似文献11.
Jun Ho Lee Chae-Seo Rhee Dae Woo Kim Chul Hee Lee 《Clinical and experimental otorhinolaryngology》2008,1(2):75-79
Objectives
To examine possible modulators of the ion transport through the apical membrane of the nasal polyps.Methods
The study was conducted using the freshly-excised nasal polyps from the patients with chronic sinusitis. A voltage-sensitive vibrating probe technique was introduced to monitor the short-circuit current across the apical membrane of the polyp at 37℃.Results
In the presence of amiloride, Adenosine 5''-triphosphate induced 4,4''-Diisothiocyanatostilbene-2,2''-disulfonic acidsensitive chloride current. Uridine 5''-diphosphate was less potent than Uridine 5''-triphosphate, and adenosine increased chloride secretion, which was blocked by the antagonist, 8-(p-sulfophenyl) theophylline on adenosine receptor. Based on the pharmacologic profiles, multiple purinergic receptors, including P2Y2, P2Y6, and P1 receptors, were functionally expressed. However, P2X receptor agonists (α,β-methyleneadenosine 5''-triphosphate and 2''- & 3''-O-[4-benzoyl-benzoyl] adenosine 5''-triphosphate), Cystic fibrosis conductance regulator (CFTR) activator (genistein), nitric oxide substrate (L-arginine), and nitric oxide donor (sodium nitroprusside) had no significant effect on the short circuit current.Conclusion
Among tested drugs, P2Y receptor agonists were major modulators of ion transport in nasal polyps in situ. 相似文献12.
Stephen R.Coats Thao T.To Sumita Jain Pamela H.Braham Richard P.Darveau 《International journal of oral science》2009,1(3):126-135
Aim To elucidate the genetic basis for the pronounced resistance that the oral pathogen, Porphyromonas gingivalis (P. gingivalis), exhibits towards the cationic antimicrobial peptide, polymyxin B. Methodology A genetic screen of P. gingivalis clones generated by a Tn4400-based random insertion mutagenesis strategy was performed to identify bacteria harboring novel genetic mutations that render P. gingivalis susceptible to killing by the cationic antimicrobial peptide, polymyxin B (PMB, 50μg·mL^-1). Results P. gingivalis (ATCC 33277) is unusually resistant to the cationic antimicrobial peptide, PMB at relatively high concentrations (200μg·mL^-1). Approximately 2,700 independent Tn4400 '-derived mutants ofP. gingivalis were examined for increased sensitivity to PMB killing at a relatively low dose (50 μg·mL^-1). A single PMB-sensitive mutant was obtained in this phenotypic screen. We determined that the Tn4400' transposon was integrated into the gene encoding the lipid A 4'-phosphatase, PGN 0524, demonstrating that this insertion event was responsible for its increased susceptibility of this clone to PMB-dependent killing. The resulting mutant strain, designated 0524-Tn4400', was highly sensitive to PMB killing relative to wild-type P. gingivalis, and exhibited the same sensitivity as the previously characterized strain, 0524KO, which bears a genetically engineered deletion in the PGN_0524 locus. Positive ion mass spectrometric structural (MALDI-TOF MS) analyses revealed that lipid A isolates from 0524-Tn4400" and 0524KO strains displayed strikingly similar MALDI-TOF MS spectra that were substantially different from the wildtype P gingivalis lipid A spectrum. Finally, intact 0524- Tn4400' and 0524KO mutant bacteria, as well as their corresponding LPS isolates, were significantly more potent in stimulating Toll-like receptor 4 (TLR4)-dependent E-selectin expression in human endothelial cells relative to intact wild-type P.. gingivalis or its corresponding LPS isolate. Co 相似文献
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Ho Yun Lee Young Il Kim Jin Woo Lee Jae Yong Byun Moon Suh Park Seung Geun Yeo 《Clinical and experimental otorhinolaryngology》2013,6(4):195-200
Objectives
Toll-like receptor (TLR)-9 recognizes unmethylated cytidine-phosphate-guanosine (CpG) motifs in bacteria. Therefore, the expression of TLR-9 may differ according to the results of bacterial culture, and thus a change in proinflammatory cytokine induction can also be expected. The authors aimed to assess the differences and relationships between the expression of TLR-9, cytokines, and nitric oxide synthase (NOS) in otitis media with effusion (OME) based on bacterial culture results.Methods
Sixty-eight patients with OME were divided into culture-positive and culture-negative groups based on middle ear culture results. mRNA expression of TLR-9, NOS, and cytokines was measured and analyzed.Results
Bacteria were detected in 38.2% of patients, and the distribution was as follows: coagulase negative Staphylococcus (10.3%), Staphylococcus aureus (8.8%), Streptococcus pneumonia (5.9%), and Bacillus spp. and Haemophilus influenza combined (2.9%). There were no significant differences in epidemiologic characteristics according to the culture results. Down-regulation of TLR-9 was observed in the culture-positive group (P=0.019). Cytokines including interleukin (IL)-12 (r=-0.582), tumor necrosis factor (TNF)-α (r=-0.569), interferon (IFN)-γ (r=-0.442), IL-6 (r=-0.395) and inducible NOS (r=-0.256) tended to decrease with the detection of bacteria.Conclusion
The expression of TLR-9 significantly decreased in OME with confirmed bacterial pathogens. IL-12, TNF-α, IFN-β, IL-6 expression tended to decrease with the detection of bacteria. The presence of bacterial pathogens in OME may be related to abnormalities in the innate immune system. 相似文献15.
Tae Woo Gu Woo Yong Bae Hwan Tae Park Jae Hoon Lee Min Young Kang Sung Wook Jeong Yoon Kyung Shin 《Clinical and experimental otorhinolaryngology》2014,7(1):1-6
Objectives
To examine the expression profile of Fas-Fas ligand (FasL) during glutamate (Glu)-induced spiral ganglion cell (SGC) apoptosis.Methods
Cultured SGCs were treated with 10-mM, 25-mM, and 50-mM concentrations of Glu and incubated for 24 or 48 hours. The expression intensity of FasL, Fas, caspase 3, and morphology of single SGC were evaluated using immunofluorescence staining.Results
In semiquantitative analysis of the Glu-treated SGC, FasL, and caspase 3 expression intensity were increased with concentration- and time-dependent manner. Fas expression intensity did not change with different concentration at 48 hours. In morphologic analysis of the Glu-treated SGC, number of apoptotic cells were increased with concentration- and time-dependent manner.Conclusion
FasL was expressed in apoptotic SGCs, suggesting that the Fas-FasL signaling pathway may be involved in the Glu-induced apoptosis of dissociated SGCs. 相似文献16.
Keon Jung Lee Seok Hyun Cho Seung Hwan Lee Kyung Tae Ho Joo Yoon Sang Heon Kim Jin Hyeok Jeong 《Clinical and experimental otorhinolaryngology》2012,5(4):228-233
Objectives
The primary aim of this study was to assess whether one can use levels of nasal nitric oxide (nNO) and exhaled nitric oxide (eNO) as a means of evaluation in allergic rhinitis.Methods
We used a chemiluminescence analyzer to measure nNO and eNO in normal controls (n=34) and allergic rhinitis patients (n=35), and compared these measurements with various parameters of clinical symptoms and laboratory data.Results
Mean nNO (389±119 ppb) in allergic rhinitis patients was significantly higher than normal controls (276±88 ppb). Without asthma, mean eNO (64.8±55.9 ppb) in allergic rhinitis patients was significantly higher than normal controls (33.0±24.0 ppb). In the persistent allergic rhinitis group, eNO concentration was significantly higher, while nNO concentration was significantly lower than the intermittent group.Conclusion
We can use nNO and eNO levels for evaluation of allergic rhinitis. However, we should consider the fact that nNO levels can be reduced, when symptoms are severe and long-lasting. Additionally, in allergic rhinitis, eNO can be elevated without asthma. 相似文献17.
Jin BJ Min HJ Jeong JH Park CW Lee SH 《Clinical and experimental otorhinolaryngology》2011,4(2):67-71
Objectives
Cholesteatoma destructs bony tissue by the interactions between hyperproliferative epithelial cells and subepithelial inflammatory cells. The aim of this study was to evaluate the expression of epidermal growth factor receptor (EGFR) and microvessel density (MVD) in middle ear cholesteatoma tissue in an effort to determine the relationship between expression of EGFR and neovascularization.Methods
We evaluated the expression of EGFR and MVD by immunohistochemical staining for CD31 and Factor VIII in 32 cholesteatoma tissue samples and 7 normal postauricular skin samples. We also analyzed the correlation between EGFR expression and MVD.Results
The expression of EGFR was higher in cholesteatoma than in postauricular skin, but the difference was not statistically significant. EGFR was more highly expressed in the suprabasal layer than in the basal layer. Using CD31 and Factor VIII, we analyzed the MVD and found that it was significantly higher in cholesteatoma than in postauricular skin, and significantly correlated with the expression of EGFR.Conclusion
Our results suggest that overexpression of EGFR and neovascularization are correlated with the growth of cholesteatoma. 相似文献18.
Hong SM Park IH Kim KM Shin JM Lee HM 《Clinical and experimental otorhinolaryngology》2011,4(4):184-187
Objectives
The Korean version of the Sniffin'' stick (KVSS) test is widely used in Korea to evaluate olfactory function. However, its validity and reliability have not been studied well. In this study, the authors administered the KVSS and the T%T olfactometer test to evaluate olfactory function and to establish relationships between these two test measures.Methods
Two hundred and eleven patients participated in this prospective randomized study. One hundred and nine patients with no olfactory symptoms and 102 patients with decreased olfaction participated. All participants were underwent KVSS II and T&T olfactometer testing.Results
The mean recognition threshold of the T&T olfactometer was -1.8±0.9 for patients with normal olfaction and 4.0±2.6 for patients with decreased olfaction. The mean Threshold-Discrimination-Identification score of the KVSS II was 30.0±3.8 for patients with normal olfaction and 15.9±7.1 for patients with decreased olfaction. Correlation coefficient between the two tests was significantly high (rs=-0.725, P<0.01).Conclusion
The KVSS and T&T olfactometry test are both reliable tests of olfactory function and their results are well correlated with each other. 相似文献19.
SH Lee SJ Lee SM Jin NH Lee DH Kim SW Chae JH Sohn WS Kim 《Clinical and experimental otorhinolaryngology》2012,5(3):150-155