康复新液治疗糜烂型扁平苔藓疗效观察

目的观察康复新液治疗糜烂型口腔扁平苔藓的短期疗效。方法选择糜烂型扁平苔藓患者56例,随机分成两组,治疗组28例,康复新液口内含漱5min。再吞服;对照组28例,局部涂溃疡糊剂,将疗效进行对比观察。结果两组比较,康复新组糜烂面显著缩小,疼痛程度显著减轻,糜烂愈合时间明显短于对照组,结果具有统计学意义。康复新组总有效率96.4%,对照组总有效率67.9%。结论康复新治疗糜烂型扁平苔藓具有较好的短期临床疗效。     

Prevalence of Merkel Cell Polyomavirus (MCPyV) in the Oral Cavity Biopsies in Northern Iran

Objective: Infection with human tumor viruses is one of the hypothesized causes of cancer. The current investigation aimed to explore the presence and quantitative analysis of a new human tumor virus, Merkel cell polyomavirus (MCPyV) in tissue samples of 114 patients with oral cavity lesions including oral squamous cell carcinoma (OSCC), oral lichen planus (OLP), Dysplasia and oral irritation fibroma (OIF) in Northern Iran. Methods: From 114 formalin fixed paraffin embedded samples; 35 with SCC, 29 with OLP, 14 with dysplasia and 36 with OIF were cut, deparaffinized and DNA was extracted. Quantitative detection of MCPyV large T antigen was performed by absolute quantitative Real-Time PCR. Result: MCPyV DNA was detected in 30.6% (n: 11/36) of IF, 24.1% (n; 7/29) of OLP, 21.4% (n:3/14) of dysplasia and 20% (n;7/35) of OSCC samples. The mean MCPyV DNA copy number was 2.32×10−2 ± 3.97 ×10−2, 2.02×10−2 (SD=3.13×10−2), 2.69×10−4 (SD=2.51×10−4), and 2.56×10−4 (SD=6.73×10−4) per cell in OSCC, dysplasia and both of OLP and OIF samples, respectively (P=0.76). Conclusion: This study provides the first data from Iran regarding the presence of MCPyV genome in oral cavity lesions and oral cancer. These results also emphasize that MCPyV has an active role in the occurrence of oral lesions and progression to cancer. Further studies should be carried out to clarify the role of MCPyV in oral cavity lesions.     

曲安奈德和帕夫林联合治疗老年糜烂型OLP疗效观察

目的：探讨局部注射曲安奈德配合口服帕夫林治疗老年人糜烂型OLP的疗效。方法：对34例老年糜烂型OLP患者用药治疗前后检测T淋巴细胞亚群的变化及观察临床疗效指标。结果：患者经治疗后临床有效率91.18%,T淋巴细胞亚群检测CD3＋、CD4＋T细胞升高（P〈0.01）,CD8＋T细胞下降（P〈0.01）,CD4＋/CD8＋治疗后上升（P〈0.01）。结论：口腔糜烂型OLP经治疗后,临床疗效肯定,血中T淋巴细胞亚群状态有明显改善。     

Oral lichen planus and chronic junctional stomatitis: differences in lymphocyte subpopulations

Objective. Oral lichen planus (OLP) is an oral counterpart or oral manifestation of the common skin disease lichen planus. Chronic junctional stomatitis (CJS) is a relatively unknown condition characterized by a stromal lymphocyte infiltrate, which is also a diagnostic feature of OLP. The differential diagnosis of OLP and CJS is unclear and they have been suggested to represent variants of the same disease. Material and methods. To investigate possible differences in lymphocyte (sub)populations between these two conditions, we immunostained 10 OLP and 10 CJS specimens for CD1-a, and the lymphocyte markers, CD3, CD4, CD5, CD8, and CD20. We scored the staining results by a four-step grading system and used the Fisher exact test to analyze them statistically. Results. The proportional amount of (CD20 positive) B lymphocytes was higher in CJS than in OLP and the predominance of CD4 positive T lymphocytes over CD8 positive T lymphocytes was stronger in OLP than in CJS. The differences were statistically significant. Conclusion. The results reflect differences in the lymphatic infiltrate between OLP and CJS. Their significance needs further investigation.     

IP-10和IL-6在口腔扁平苔藓中表达的研究

目的:检测正常口腔黏膜与口腔扁平苔藓(OLP)黏膜的上皮和固有层结缔组织中干扰素诱导蛋白10(IP-10)、细胞因子白细胞介素-6(IL-6)mRNA的表达,探讨其在OLP中的作用。方法:应用荧光实时定量RT-PCR技术检测10例OLP黏膜和6例正常口腔黏膜的上皮和固有层结缔组织中IP-10、IL-6mRNA的表达量。结果:OLP黏膜上皮和固有层结缔组织中IP-10、IL-6mRNA的表达均较正常口腔黏膜明显升高(P<0.05),但IP-10、IL-6mRNA的表达量没有明显差异(P>0.05)。结论:OLP组织中趋化因子IP-10、细胞因子IL-6表达量改变可能与其发生发展有一定关系。     

Expression of keratins 8, 18, and 19 in epithelia of atrophic oral lichen planus

Keratins form intermediate filaments of the cytoskeleton in keratinocytes and have roles in cell structure, signaling, intracellular transport, and cell death. Oral lichen planus (OLP) is an oral inflammatory disease with derangements in basal keratinocytes and disruption of the basal membrane. Here, we focused on epithelial expression of keratins 8, 18, and 19 because these proteins are known to modulate cell death. Biopsies were taken from buccal oral mucosa of persons with normal oral mucosa (n = 10) or atrophic OLP (n = 10). Cultured normal oral keratinocytes (n = 4) showed expression of mRNA and protein for keratins 8, 18, and 19. Immunohistochemistry showed consistent staining for keratins 8 and 18 in basal keratinocytes of normal oral mucosa. In OLP, staining for keratin (K)8 was mostly negative and staining for K18 was weak. Keratin 19 was expressed irregularly in most biopsies of normal oral mucosa and not at all in OLP. Several mononuclear leukocytes in the cellular infiltrate showed membrane staining for K8 and K18. Positive staining for K16 confirmed partial collapse of the basal cell layer in OLP. The basal cell niche in OLP therefore appeared to be partly populated with keratinocytes demonstrating a higher degree of differentiation (K8⁻ K18⁻ K19⁻ K16⁺); consequently, such areas may be more susceptible to the action of cell death factors released from the cell infiltrate as a result of lacking the protective, normal keratin present in the basal epithelial cell layer of normal oral mucosa.     

Glial responses to neonatal hypoxic-ischemic injury in the rat cerebral cortex.

Neurogenesis is nearly completed after birth, whereas gliogenic activities remain intense during the postnatal period in the developing rat cortex. These include involution of radial glia, proliferation of astrocytes and oligodendrocytes and myelin formation. Little is known about the effects of hypoxic-ischemic (HI) injury on these critical postnatal processes. Here we explored the glial reactions to mild HI injury of the neonatal rat cerebral cortex at P3. We show that the HI lesion results in disruption of the normal radial glia architecture, which was paralleled by an increase in GFAP immunopositive reactive astrocytes. The morphology of these latter cells and the fact that they were immunolabelled for both nestin and GFAP suggest an accelerated transformation of radial glia into astrocytes. In addition, BrdU/GFAP immunostaining revealed a significant increase of double-labelled cells indicating an acute proliferation of astrocytes after HI. This enhanced proliferative activity of astrocytes persisted for several weeks. We found an elevated number and increased mitotic activity of both NG2-positive oligodendrocyte progenitors and RIP-positive oligodendrocytes after injury. These findings imply that glial responses are central to cortical tissue remodelling following neonatal ischemia and represent a potential target for therapeutic approaches.     

Immunological evaluation in oral lichen planus with chronic hepatitis C

Oral lichen planus (OLP) is frequently associated with hepatitis C virus (HCV) infection. We have previously reported that the pathogenesis of OLP arises from host rather than viral factors. In this study, we investigated the role of these factors in 41 patients with chronic hepatitis C: 22 with OLP (group 1) and 19 without OLP (group 2). All patients had antibodies to HCV (anti-HCV) and were serum HCV RNA-positive; none were HBsAg-positive. Immune abnormalities in serum were evaluated by testing for antinuclear antibody (ANA), rheumatoid factor (RF) activity, immunoglobulins (IgG, IgM, and IgA), and cryoglobulin. The rate for ANA positivity and IgM levels were significantly higher in group 1 than in group 2 (P<0.05). Mean age in group 1 was significantly higher in group 2 (P=0.0001). Of the factors tested, ANA, IgM, and age, logistic regression showed that age correlated independently with OLP (P=0.003). In 5 patients in group 1, the infiltrating lymphocytic subsets of the OLP lesion were examined histopathologically. Predominant T cell infiltration was shown in all 5 patients. In addition to host factors, we also examined viral factors in both groups of patients, measuring serum HCV RNA level and determining HCV genotype. There were no significant differences between the groups in these viral factors. This study suggested that host factors induced by the HCV infection are more important than viral factors in the pathogenesis of OLP associated with hepatitis C.     

LAIR-1与 TGF-β在口腔扁平苔藓患者外周血中表达的相关性研究

目的：研究 LAIR-1和 TGF-β在口腔扁平苔藓（OLP）患者外周血中的表达情况,探讨 LAIR-1和 TGF-β对 OLP 患者免疫功能的影响。方法：采用流式细胞术检测 LAIR-1在 OLP 患者（n ＝22）和健康人（n ＝22）外周血 Treg 上的表达水平, ELISA 检测外周血 TGF-β的水平。结果：OLP 患者外周血 CD4＋Foxp3＋Treg 上 LAIR-1阳性率高于健康人,TGF-β的水平亦高于健康人,LAIR-1在 CD4＋Foxp3＋Treg 上的表达水平和 TGF-β的水平呈正相关（r ＝0．43,P ＜0．05）。结论：LAIR-1和TGF-β在 OLP 患者外周血中表达上调,提示 LAIR-1和 TGF-β可能参与了 OLP 的发病。