T细胞在慢性鼻窦炎中的作用机制

慢性鼻窦炎(CRS)的基本病理特征为鼻窦黏膜的慢性炎症反应,其发病机制尚未完全阐明,但目前认为免疫应答紊乱及免疫细胞分化异常密切相关。已有研究表明,各种亚型的T细胞及其分泌的炎性因子都对CRS的发生发展具有一定的推动作用。Th1细胞介导细胞免疫,Th2细胞介导体液免疫,CRS患者体内存在Th1和Th2细胞比例失衡,当Th2免疫活性过度增高,造成Th2细胞浸润鼻黏膜局部,Th2细胞分泌的IL-4在鼻黏膜组织和血清中的含量明显增加。IL-4可以对Th1细胞产生抑制作用,让T细胞与B细胞的相互作用得到增强,进一步促进体液免疫应答。本文重点对CD4⁺T细胞、CD8⁺T细胞在CRS中的发生机制进展进行综述分析。     

Immunologic aspects of chronic sinusitis.

The role of immunological defence mechanisms in the development of acute recurrent or chronic sinusitis is obviously of considerable importance but the incidence of such immune problems is unknown. To elucidate this situation, a prospective study of 47 patients with chronic rhino-sinusitis were examined for abnormalities of serum immunoglobulins, both major class and subclasses. Deficiencies of minor IgG subclasses may be obscured by only measuring the major IgG class and should be specifically sought in clinically suspicious cases. The clinical and therapeutic implications are considered.     

Bacteria in chronic maxillary sinusitis.

Sixty-one chronically inflamed maxillary sinuses produced 131 bacterial strains from mucosal pieces that were taken during a Caldwell-Luc operation and cultured aerobically and anaerobically. Sinus secretions showed only 62 and nasal secretions 106 bacterial strains. Fourteen mucosal strains, including 11 Haemophilus influenzae, grew heavily. None of 24 mucosal anaerobes showed heavy growth. Of 52 antral mucosae with culturable bacteria, 37 disclosed mixed and 15 pure growth. The bacteriological characteristics of the diseased sinus and the nose did not correlate. The duration or extent of the disease, the macroscopic appearance of the diseased sinus, or the presence or absence of allergy were unrelated to bacteriological findings, except that H influenzae was concentrated in purulent sinuses. Intraoperative culture of antral mucosa seems to give the most reliable picture of the bacteriological condition in chronic maxillary sinusitis.     

Bacteriology of chronic sinusitis and acute exacerbation of chronic sinusitis

OBJECTIVE: To establish the microbiological characteristics of acute exacerbation of chronic sinusitis (AECS). SETTING: Academic medical center. PATIENTS: Thirty-two patients with chronic sinusitis and 30 patients with AECS. MAIN OUTCOME MEASURE: The aerobic and anaerobic microbiology of maxillary AECS and chronic maxillary sinusitis. RESULTS: A total of 81 isolates (33 aerobic and 48 anaerobic) were recovered from the 32 cases (2.5 per specimen) with chronic sinusitis. Aerobes alone were recovered in 8 specimens (25%), anaerobes only were isolated in 11 (34%), and mixed aerobes and anaerobes were recovered in 13 (41%). The predominant aerobic and facultative bacteria were Enterobacteriaceae and Staphylococcus aureus. The predominant anaerobic bacteria were Peptostreptococcus subspecies, Fusobacterium subspecies, anaerobic gram-negative bacilli, and Propionibacterium acnes. Twenty-one beta-lactamase-producing bacteria were recovered from 17 specimens (53%). A total of 89 isolates (40 aerobic and facultatives, and 49 anaerobic) were recovered from the 30 patients (3.0 per specimen) with AECS. Aerobes were recovered in 8 instances (27%), anaerobes only in 11 (37%), and mixed aerobes and anaerobes were recovered in 11 (37%). The predominant aerobes were Streptococcus pneumoniae, Enterobacteriaceae, and S aureus. The predominant anaerobes were Peptostreptococcus subspecies, Fusobacterium subspecies, anaerobic gram-negative bacilli, and P acnes. Thirty-six beta-lactamase-producing bacteria were recovered from 28 specimens (53%). CONCLUSIONS: This study demonstrates that the organisms isolated from patients with AECS were predominantly anaerobic and were similar to those generally recovered in patients with chronic sinusitis. However, aerobic bacteria that are usually found in acute infections (eg, S pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis) can also emerge in some of the episodes of AECS.     

Fosfomycin nebulizer therapy to chronic sinusitis

OBJECTIVE: effects of Fosfomycin (FOM) nebulizer therapy were studied in patients with chronic sinusitis. METHODS: about 28 patients with chronic sinusitis were administered 2 ml of FOM sodium (3% w/v) by nebulizer three times per week for 4 weeks. Levels of IL-1 beta, IL-6, IL-8, and TNF-alpha in nasal lavage were also measured before and at the end of treatment. RESULTS: the overall efficacy of this treatment on the basis of both subjective and objective symptoms, was 'excellent' for 28.6%, 'good' for 10.7%, 'fair' for 39.4%, and yield 'no change' for 21.4% of the patients. Both IL-1 beta and IL-6 concentrations were significantly decreased after treatment. Although the IL-8 level did not significantly decrease, it seems to be related to the overall efficacy. TNF-alpha was not detected in all of the samples. CONCLUSION: FOM nebulization therapy is highly effective in treatment for chronic sinusitis, and efficacy may be due to an immunomodulatory mechanism, as well as its bactericidal effect.     

Bacteriological study in chronic maxillary sinusitis.

The bacterial findings of 73 maxillary sinuses in 48 patients with chronic maxillary sinusitis, together with 7 non-inflamed sinuses, are reported. Employing an intraoperative technique and simultaneous collection of 3 different types of specimens in the present investigation made possible comparison of their bacterial characteristics. The results indicated that intraoperative culture of antral mucosa seems to provide the most reliable finding of bacterial flora in chronic maxillary sinusitis. The anaerobic bacteria were never found in the mucosal culture of non-inflamed sinus. The anaerobes appeared to invade the sinus cavity following the sealing of the ostium through the lymphatic or venous system and maintain the inflammatory process. Microbiological analysis of the results between the infected and non-inflamed sinuses established anerobic bacteria as the most important pathogen in chronic maxillary sinusitis. The predominant anaerobes recovered in descending order of frequency were Veillonella sp., Peptococcus sp., Propionibacterium acne and anaerobic nonspore-forming GPB. Statistical analysis of the results of mucosal culture of inflamed and control materials demonstrated that those aerobic and faculatative bacteria recovered in the inflamed sinus appeared to be the normal inhabitants of non-inflamed sinus mucosa. The presence of normal flora in the normal healthy sinus mucosa may explain the chain of events that follows the occlusion of the ostium. These aerobic bacteria may become pathogenic and play a role in the pathogenesis of sinusitis.     

Aspirin intolerance in patients with chronic sinusitis.

Aspirin intolerance in patients with chronic sinusitis is often a cause of early recurrence of symptoms after surgical treatment. This study assesses 84 patients who were tested for acetylsalicylic acid intolerance after presenting with symptoms like chronic rhinosinusitis, sometimes bronchial asthma, coexisting allergies or a history of aspirin sensitivity. Nasal polyposis was found in a majority of cases, often recurrent after previous surgery. The levels of eicosanoids such as peptido-leukotrienes and prostaglandin E2 were analyzed in isolated blood cells and compared with a healthy control group. Aspirin-intolerant patients showed elevated basal levels of peptido-leukotrienes and reduced basal levels of prostaglandin E2. Test results were graded in a system ranging from positive (68%), signifying aspirin intolerance, to borderline (18%) and negative results (14%). After screening patients with clinical findings indicating a possible aspirin intolerance, the results of this investigation reveal a strong correlation between the clinical symptomatology and the in vitro parameters of eicosanoid levels in isolated blood cells, indicating the need to induce aspirin tolerance to reduce the risk of recurrent rhinosinusitis.     

An immunological approach to chronic and recurrent sinusitis

PURPOSE OF REVIEW: Sinusitis is an illness that is often successfully treated by primary care physicians. Recurrent or chronic rhinosinusitis, however, can be frustrating for patients as well as primary care and subspecialty providers. The present review details the approach to recurrent or chronic sinusitis. We give a broad overview of the workup of chronic rhinosinusitis, focusing on immune deficiency, an often overlooked but clinically important aspect of the sinusitis workup. RECENT FINDINGS: Immune deficiency is prevalent in patients with recurrent or chronic sinus disease. An immunologic workup, as well as a workup for other chronic treatable diseases, should be undertaken before sinus surgery or in patients who have been unresponsive to surgery. This approach can enhance visualization during surgery, minimize postoperative complications, improve surgical outcomes, and possibly obviate the need for surgery altogether. SUMMARY: Elucidating the cause of recurrent or refractory sinus disease can be challenging. Allergic disease should be evaluated and treated early in the process. An immunologic evaluation should be performed and uncommon causes of sinus inflammation should be addressed later in the course to reduce inflammation either to avoid surgery or improve surgical outcomes.     

慢性鼻窦炎的辨证论治

综合论述了中医对慢性鼻窦炎发病机制的认识,显示了中医药在“整体观念、辩证论治”指导下,以内治、外治、针灸、推拿、按摩等方法对慢性鼻窦炎进行“同病异治”的特色和优势,提出了中医药治疗慢性鼻窦炎的不足及今后需要解决的问题。     

Microbiology of chronic hyperplastic sinusitis

BACKGROUND: Patients with chronic hyperplastic sinusitis (CHS) form a heterogeneous group with similar symptoms and similar treatment despite of possible different mechanisms behind the disease. In the present study we focused on the microbiological findings in CHS and compared these results to the patient history in order to find out a possible explanation for the aetiology and chronicity of CHS. METHODS: In 30 patients the sinus mucus was collected under endoscopic sinus surgery. Samples from 20 healthy volunteers were collected by nasal lavage. Eosinophil staining, bacterial culturing and fungal staining and culturing were done. Histological samples were obtained from all patients. RESULTS: Bacterial cultures were positive in 93% of the patients compared to 70% in controls. Staphylococcus aureus and coagulase-negative Staphylococci were the two most common findings in both groups. A total of seven patients had positive fungal finding. The only fungal genus found was Aspergillus. In the control group no samples were positive for fungi. CONCLUSIONS: Microbiological findings do not seem to explain the chronic course of CHS, but fungi may play some part in the pathophysiology of the disease. These results may be more a reflection of a change in the environment in the paranasal sinuses and a change in normal flora than the actual cause of CHS.     

慢性鼻窦炎的细菌学研究

目的研究慢性鼻窦炎的细菌分布及其耐药性特征。方法术中收集76例慢性鼻窦炎患者上颌窦和后组筛窦的分泌物,分别进行需氧菌、厌氧菌与真菌的培养、药物敏感试验以及产β内酰胺酶菌株(βLPB)检测,同时以10名健康受试者作对照。结果实验组共培养出20种细菌,主要为表皮葡萄球菌、大肠埃希菌、金黄色葡萄球菌、甲型链球菌和肺炎链球菌等;细菌培养阳性率为81.8%,其中需氧菌占83.4%,厌氧菌占16.6%;革兰阳性菌为56.3%,革兰阴性菌43.7%;真菌培养阳性率仅1.4%。药物敏感试验显示对需氧菌抗菌活性较高的广谱抗生素是亚胺培南、头孢噻肟和阿莫西林克拉维酸;对厌氧菌抗菌活性较高的是甲硝唑、亚胺培南和氯霉素。βLPB检出率为37.7%,以表皮葡萄球菌、金黄色葡萄球菌、流感嗜血杆菌和卡他布兰汉菌的比例较高。对照组检测出表皮葡萄球菌和大肠埃希菌等5种细菌,与实验组同种细菌分布的差异无统计学意义(χ2=0.446,P>0.05)。结论慢性鼻窦炎以需氧菌感染为主,菌株耐药现象严重。细菌感染在本病中的作用并非关键,不宜过分强调抗生素的使用。应用抗生素治疗宜先进行细菌培养与药物敏感试验;如情况不允许,可选择广谱耐β内酰胺酶类抗生素,如头孢噻肟、阿莫西林克拉维酸等。     

Establishment of human mucosal microvascular endothelial cells from inferior turbinate in culture

Human microvascular endothelial cells were isolated and cultured from the mucosa of inferior turbinates. Using dish-coated collagen and a medium composed of a 1:1 mixture of sarcoma 180-conditioned medium and Dulbecco's modified Eagle's medium (containing 10% fetal bovine serum and 75 micrograms/mL endothelial cell growth factors prepared from bovine pituitary glands), these cells grew rapidly to confluence and survived serial passages until the 16th population doubling level. The cells were identified as endothelial cells by their morphology, immunostaining of factor VIII antigen, and cytochemical staining with Ulex europeus agglutinin. Furthermore, Weibel-Palade bodies and numerous pinocytotic vesicles were confirmed by electron microscopy. Proliferation experiments demonstrated the need for either endothelial cell growth factor or tumor-conditioned medium. An exogenous matrix was also required for these cells in tissue culture. A tubule-like morphology appeared in the original monolayer of human microvascular endothelial cells after 1 month in the same plate, indicating that these cells have the ability to form tubules in the presence of sarcoma 180-conditioned medium.     

Quantitative analysis of mucin and lectin in maxillary sinus fluids in patients with acute and chronic sinusitis

OBJECTIVES: Sinusitis is characterized by quantitative and qualitative changes in mucus biosynthesis that contribute to sinus disease. In general, patients with acute sinusitis complain of purulent rhinorrhea, whereas those with chronic sinusitis complain of mucoid or mucopurulent rhinorrhea Locally produced mucin largely contributes to the high viscoelasticity of mucus in sinusitis. In this study, the authors attempt to quantify the concentrations of mucin and lectin in the maxillary sinus fluids from these patients. STUDY DESIGN: To assess the concentrations of mucin and lectin in aspirates of 11 acutely and 11 chronically inflamed maxillary sinuses, the concentration of mucin was measured by enzyme-linked immunosorbent assay (ELISA) and that of lectin by sandwiched enzyme-linked lectin assay (ELLA). RESULTS: The concentrations of mucin and lectin that were measured using monoclonal antibodies (HCS 4, HCS 14, and HCS 18) and Ulex europaeus agglutinin-1 (UEA-1) in chronic sinusitis were higher than those in acute sinusitis. The concentration of total protein in chronic sinusitis was lower than that in acute sinusitis. Each mucin and lectin versus total protein ratio in chronic sinusitis was higher than that in acute sinusitis. CONCLUSIONS: These data suggest that hypersecretion in chronic sinusitis may result from locally increased mucin production. Comprehension of this mechanism may be a strategy to prevent the viscous cycle of paranasal sinus fluids in chronic sinusitis.     

Microbiology of chronic frontal sinusitis

OBJECTIVES: To determine bacterial and fungal organisms that are present in patients undergoing surgery for chronic frontal sinusitis. STUDY DESIGN: Retrospective, nonrandomized study. METHODS: Retrospective, nonrandomized bacterial and fungal cultures were performed on 46 sinus aspirates obtained by frontal sinus trephination performed on 30 consecutive patients with chronic frontal sinusitis. RESULTS: Six patients were having sinus surgery for the first time, 19 patients had undergone prior functional endoscopic sinus surgery without instrumentation of the frontal sinus/recess, and the third group included 5 patients who had undergone prior frontal sinus/recess surgery. Preoperative computed tomography scan of the frontal sinuses revealed complete opacification in 63% (29/46 frontal sinuses) and partial opacification in 22% (10/46), and no data were available for 15% (7/46). Aerobic cultures revealed that 38% (13/35 cultures) had no growth, 21% (7/35) grew Staphylococcus aureus, 21% (7/35) grew coagulase-negative Staphylococcus, 9% (3/35) grew Haemophilus influenzae, and 26% (9/35) grew a variety of other organisms. Anaerobic cultures were positive in 3% (1/32) of sinuses, and fungal cultures were positive in 4% (1/24). Haemophilus influenzae was most common in primary cases, whereas coagulase-negative Staphylococcus was most common in patients undergoing revision frontal sinus surgery. There were no other significant differences between cultures from patients undergoing revision frontal sinus surgery, revision functional endoscopic sinus surgery without prior frontal surgery, and primary surgery. CONCLUSIONS: This study suggests that organisms involved in chronic inflammatory disease of the frontal sinus may change after previous sinus surgery. The study failed to support a significant role for anaerobes. The role for coagulase-negative Staphylococcus as a potential pathogen or a contaminating agent remains unclear.     

剪切力对耳蜗微血管内皮细胞细胞骨架的影响

目的观察不同剪切力对体外培养的豚鼠耳蜗微血管内皮细胞形态学及细胞骨架的影响。方法用自制的流体力学装置在不同时相点、以不同剪切力对豚鼠耳蜗微血管内皮细胞行力学作用,获得形态学图象,同时对其细胞骨架在激光扫描共聚焦显微镜下行F-actin荧光染色测定分析。结果不同大小的剪切力作用会导致细胞形态发生变化;细胞形态变化后会出现应力纤维改变,应力纤维的变化早于形态学改变,这种改变随剪切的时间、力量变化而变化。结论豚鼠耳蜗微血管内皮细胞在受到剪切力作用后之所以会产生形态学改变,可能与细胞骨架变化有关。