Impact of endoscopic sinus surgery on otologic symptoms associated with chronic rhinosinusitis

ObjectiveTo evaluate improvements in otologic symptoms after endoscopic sinus surgery (ESS) in patients with chronic rhinosinusitis (CRS), and identify differences in symptoms, if any, between CRS patients with (CRSwNP) and without (CRSsNP) nasal polyposis.Material and methodsThis is a prospective multi-center observational cohort study. Adults with medically recalcitrant CRS who elected ESS were enrolled in a prospective, multi-center, observational cohort study between March, 2011 and October, 2014. Preoperative evaluation of subjects included assessment of clinical characteristics, measures of disease severity, and quality of life evaluation using the 22-item SinoNasal Outcome Test (SNOT-22). Postoperative improvement in otologic symptoms (ear fullness, dizziness, ear pain) scores were evaluated and compared between CRSwNP and CRSsNP subgroups.ResultsThree hundred and ninety-five study patients completed both preoperative and postoperative evaluations, with an average follow-up of 13.9 months after ESS. The prevalence of patients reporting at least one otologic symptom preoperatively (87%) significantly decreased after ESS (63%, P < 0.001). Significant postoperative improvement across all otologic scores was also reported (P < 0.001). Relative mean improvement in otologic symptom severity was similar for both CRSwNP and CRSsNP, except patients with CRSwNP reported significantly greater postoperative improvement in ear fullness compared to CRSsNP (54% vs. 41%, P = 0.039). A total of 61%, 44%, and 43% of patients reported experiencing improvement in “ear fullness”, “dizziness” and “ear pain”, respectively.ConclusionSinus surgery significantly improves otologic symptoms associated with CRS. CRSwNP patients reported slightly greater relief of ear fullness than CRSsNP patients following ESS.     

Effects of pepsin A on heat shock protein 70 response in laryngopharyngeal reflux patients with chronic rhinosinusitis

Objectives: We investigated the relationship between laryngopharyngeal reflux (LPR) and chronic rhinosinusitis (CRS), and explored the effects of pepsin A on the level of heat shock protein 70 (HSP70) in CRS.

Methods: We included 23 CRS patients with nasal polyps (CRSwNP), 26 CRS patients without nasal polyps (CRSsNP) and nine normal controls to measure pepsin A levels in nasal secretions, blood plasma and nasal tissues, to measure HSP70 levels in nasal tissues, and to detect pepsinogen A, HSPA5, cyclo-oxygenase-2 (COX-2), and carbonic anhydrase III (CAIII) mRNA expression levels in nasal tissues.

Results: Pepsin A levels in nasal secretions were significantly higher in CRSwNP/CRSsNP patients than in controls. HSP70 levels were significantly increased in pepsin A-positive turbinate mucosa compared to controls (p?p?=?.016). Furthermore, no association was found between the presence of pepsin A and HSPA5, COX-2, and CAIII mRNA expression levels.

Conclusions: These results suggest that LPR may play a role in the development of CRS through pepsin A reflux, and increased HSP70 expression may be associated with the pathogenic mechanism of mucosal injury in CRS.     

嗜酸性粒细胞与慢性鼻-鼻窦炎伴鼻息肉的相关性研究进展

慢性鼻窦炎（chronic rhinosinusitis,CRS）是鼻腔黏膜和鼻窦黏膜的慢性炎性疾病,根据有无鼻息肉可分为慢性鼻-鼻窦炎伴鼻息肉（chronic rhinosinusitis with nasal polyps,CRSwNP）和慢性鼻-鼻窦炎（chronic rhinosinusitis without nasal polyps,CRSsNP）。鼻息肉组织常见有嗜酸性粒细胞(eosinophils,EOS) 浸润增多,根据嗜酸性粒细胞的浸润程度可将CRSwNP分为两个亚型：嗜酸粒细胞型慢性鼻窦炎伴鼻息肉(eosinophilic chronic rhinosinusitis with nasal polyps, ECRSwNP)和非嗜酸粒细胞型慢性鼻窦炎伴鼻息肉 (nonesinophilc chronic rhinosinusitis with nasal polyps,nonECRSwNP);将慢性鼻窦炎分为：嗜酸粒细胞型慢性鼻窦炎（eosinophilic chronic rhinosinusitis, ECRS)和非嗜酸粒细胞型慢性鼻窦炎(non eosinophilic,NECRS)。嗜酸性粒细胞在鼻息肉形成、发展机制中的作用多年来一直备受学者们关注。随着研究的不断深入,嗜酸性粒细胞在鼻窦炎鼻息肉炎症趋化、息肉形成、分型和预后中的作用得到越来越多的重视。     

慢性鼻窦炎伴或不伴鼻息肉患者血清嗜酸粒细胞阳离子蛋白水平的比较

目的 比较慢性鼻窦炎伴有鼻息肉（CRSwNP）和不伴鼻息肉（CRSsNP）患者中血清嗜酸粒细胞阳离子蛋白（ECP）水平的差异。方法 采用ImmunoCAP100E系统,检测99例CRSwNP患者和59例CRSsNP患者的血清ECP水平,并与健康对照组84例比较。结果 三组间血清ECP水平的差异有统计学意义（P＜0.05）,其中CRSwNP组明显高于健康对照组（P＜0.01）,尤其是中-重度患者与健康对照组比较血清ECP水平显著升高（P＜0.01）。但CRSwNP组与CRSsNP组比较,差异无统计学意义（P＞0.05）;两组轻度与中-重度患者之间分别进行比较,差异均无统计学意义（P＞0.05）。结论 嗜酸粒细胞性炎症反应在慢性鼻窦炎伴或不伴鼻息肉的发病中可能均发挥了作用,但疾病的严重程度与炎性指标ECP的血清浓度之间未见明显相关性,有待进一步探讨。     

Effect of Chronic Rhinosinusitis With or Without Nasal Polyp on Quality of Life in South Korea: 5th Korea National Health and Nutrition Examination Survey Korean

ObjectivesThis is the first study of its kind to investigate the relationship between chronic rhinosinusitis (CRS) with or without nasal polyps (NP) and health-related quality of life (HRQoL) in the general adult Korean population. We sought to evaluate the association after adjustment for confounding factors. We also evaluated HRQoL according to presence of NP in CRS patients.MethodsIn this cross-sectional study we used nationally representative samples from the 5th Korea National Health and Nutrition Examination Survey (2010–2012). A total of 17,490 participants were included in the study, of which 613 were diagnosed with CRS. Univariate analysis was conducted on healthy versus CRS groups, segregated by gender with weighted prevalence of demographic characteristics, socioeconomic status, and comorbid diseases. Subanalysis was carried out to evaluate the relationship between CRS with or without NP and HRQoL using EuroQol 5-dimension (EQ-5D) and visual analog scale (EQ-VAS). The odds ratios for EQ-5D were estimated by multiple logistic regression analyses with confounder adjustment.ResultsWeighted prevalence of CRS of adult male was found to be 3.7% and CRS with nasal polyps (CRSwNP) 0.5%, while female CRS was 3.3% and CRSwNP 0.3%. There was no significant difference between the groups (P#x0003d;0.332). The scores for female, EQ-5D index (P for trend<0.001) and EQ-VAS (P for trend=0.002) showed decreasing trend from healthy participants to CRS without nasal polyps (CRSsNP) and from CRSsNp to CRSwNP. After adjusting for demographic characteristics, socioeconomic status, and comorbid diseases, EQ-5D scores; EQ-5D index (P<0.001) and EQ-VAS (P<0.001) exhibited poorer HRQoL compared to healthy participants, exclusively within the female group.ConclusionThese data suggest that female patients with CRS are at higher risk of poor HRQoL. In addition, HRQoL of female CRSwNP was lower compared to those of CRSsNP and healthy participants.     

Efficacy of lianhuaqingwen granules in the management of chronic rhinosinusitis without nasal polyps

ObjectivesChronic rhinosinusitis (CRS) is a complicated disease with clinical symptoms that are impacted by the absence or presence of nasal polyps (CRSsNP or CRSwNP). Understanding of the different treatments of CRS is very significant in selecting appropriate therapies and preventing exacerbation relevant to this chronic inflammation. This study was aimed to evaluate the effect of Chinese traditional medicine lianhuaqingwen granules on CRSsNP.Materials and methodsCRSsNP patients were enrolled and randomized into placebo or lianhuaqingwen (LHQW) granules treatment group (placebo or LHQW group). Their clinical symptoms were scored using Visual Analog Scale (VAS) and Sino-Nasal Outcome Test (SNOT)-22. Nitric oxide (NO) from nasal cavity and sinus and nasal resistance were also examined. Then, nasal biopsy samples and nasal lavage fluid (NLF) were obtained from these patients, and histologic characteristics of nasal mucosa and T cell subpopulations patterns in the NLF were evaluated. Finally, inflammatory mediators in the NLF were assessed in both groups.ResultsOne hundred and forty patients with CRSsNP finished this one-month study. VAS and SNOT-22 scores and nasal resistance were all decreased distinctly after the treatment of LHQW, but not after placebo. However, the nasal NO concentration was increased in LHQW administration group in comparison with placebo group. There were significant differences in above parameters between these two treatments. Histologic changes in nasal mucosa were improved only in LHQW group. CD4⁺ and CD8⁺ T cells were all downregulated in the LHQW treatment group, but not in placebo group. Inflammatory mediators from the NLF were decreased in LHQW treatment group compared to placebo group. Furthermore, there were significant changes between these two groups in CD4⁺ and CD8⁺ T cell subpopulations and concentrations of inflammatory substances.ConclusionThese findings demonstrate that LHQW granules treatment may control the inflammation in nasal mucosa and result in the improvement of CRSsNP. This Chinese medicine might become a promising therapy in the management of this disease.     

老年慢性鼻-鼻窦炎伴鼻息肉患者鼻内镜术后复发的影响因素分析

目的 探讨老年慢性鼻-鼻窦炎伴鼻息肉(chronic rhinosinusitis with or without nasal polyps,CRSwNP)患者鼻内镜术后复发的影响因素.方法 行鼻内镜治疗的老年CRSwNP患者126例,根据是否复发分为复发组(52例)和未复发组(74例),对可能影响其术后复发的相关因素...     

缺氧诱导因子1α与黏蛋白5在慢性鼻-鼻窦炎组织中的表达与意义

目的：探讨缺氧诱导因子1α（hypoxia-inducible factor-1α,HIF-1α）与黏蛋白5AC（MUC5AC）、黏蛋白5B （MUC5B）mRNA在慢性鼻-鼻窦炎（CRS）中的表达水平及其相关性。方法选82例CRS伴鼻息肉（CRS with nasal polyps,CRSwNP）组、88例CRS不伴鼻息肉（CRS without nasal polyps,CRSsNP）组以及15例正常上颌窦口黏膜作为对照组。收集3组鼻窦黏膜,采用免疫组织化学法和逆转录定量PCR（qRT-PCR）检测HIF-1α与MUC5AC、MUC5B的表达并分析相关性。结果①免疫组化结果：光镜下, CRSsNP或CRSwNP组中黏膜上皮MUC5AC的染色更多,主要位于胞浆内,呈浅黄色或棕黄色颗粒;MUC5B主要在黏膜下腺腺体的黏液细胞中表达;HIF-1α主要定位在黏膜上皮细胞核,在胞浆内也有表达,呈浅黄色或棕黄色颗粒,较对照组明显增多。②qRT-PCR结果：CRSwNP组中HIF-1α、MUC5AC、MUC5B mRNA的相对表达量分别为1.565±0.145、0.980±0.215、1.432±0.263;CRSsNP组中相对表达量分别为1.612±0.253、0.901±0.279、1.509±0.289;对照组中相对表达量分别为0.381±0.162、0.357±0.164、0.400±0.218;CRSsNP组、CRSwNP组与对照组比较差异均有统计学意义（P均<0.05）。CRSsNP组、CRSwNP组中HIF-1α与MUC5AC、MUC5B mRNA的表达均呈正相关（CRSwNP组：r=0.501、0.676,CRSsNP组：r=0.527、0.601,P均<0.05）。结论 HIF-1α与MUC5AC、MUC5B mRNA在CRS中表达水平明显升高,且HIF-1α与MUC5AC、MUC5B mRNA表达存在密切联系。     

Causes of higher symptomatic airway load in patients with chronic rhinosinusitis

Background

Chronic rhinosinusitis display a variety of different phenotypes. The symptoms of disease are characterised by various signs and symptoms such as nasal congestion, nasal discharge, pressure sensation in the face and reduced or complete loss of smell.In a patient population undergoing functional endoscopic sinonasal surgery (FESS) for chronic rhinosinusitis, we wanted to investigate the clinical features and explore if the presence of biofilm, nasal polyps or other disease characteristic could serve as predictor for the symptomatic load. A patient group undergoing septoplasty without disease of the sinuses was included as control.

Methods

The Sinonasal outcome test (SNOT-20), EPOS visual analogue scale (VAS) and the Lund-Mackey CT score (LM CT score) were used to examine 23 patients with chronic rhinosinusitis without nasal polyps (CRSsNP), 30 patient with nasal polyps (CRSwNP) and 22 patients with septal deviation. Tissue samples were collected prospectively during surgery. The cohort has previously been examined for the presence of biofilm.

Results

Patients with CRSsNP and CRSwNP had significantly higher degree of symptoms compared to the septoplasty group (SNOT-20 scores of 39.8, 43.6 and 29.9, respectively, p?=?0.034). There were no significant differences in the total SNOT-20 or VAS symptoms scores between the CRSsNP and CRSwNP subgroups. However patients with nasal polyps showed significantly higher scores of symptoms related to sinonasal discomfort such as cough, runny nose and need to blow nose (p?=?0.011, p?=?0.046, p?=?0.001 respectively). Patients with nasal polyps showed a significantly higher LM CT score compared to patients without polyps (12.06 versus 8.00, p?=?0.001). The presence of biofilm did not impact the degree of symptoms.

Conclusion

The presence of nasal polyp formations in CRS patients was associated with a higher symptomatic airway load as compared to patients without polyps. These findings suggest that nasal polyps could be an indicator of more substantial sinonasal disease. The presence of biofilm did not impact the degree of symptoms, however, as biofilm seem to be a common feature of chronic rhinosinusitis (89% in this cohort), it is more likely to be involved in the development of the CRS, rather than being a surrogate marker for increased symptomatic load.

     

Clinical predictors of revision surgery for chronic rhinosinusitis with nasal polyposis within 5-year follow-up

BackgroundChronic rhinosinusitis with nasal polyposis (CRSwNP) remains a difficult-to-cure disease. The aim of this study was to determine the potential long-term predictors of revision sinus surgery for CRSwNP.MethodsProspectively gathered patients with bilateral CRSwNP who received primary endoscopic sinus surgery were enrolled. Clinical variables, including the preoperative Lund-Mackay score (LMS), were collected to clarify possible risk factors for revision surgery within a 5-year follow-up. The symptomatic burden was measured using a 10-cm visual analog scale (VAS) before and 1 year after surgery. Further survival analysis was performed to present the revision-free survival in Kaplan−Meier plotting.ResultsEighty four qualified patients were identified and all of them experienced significant improvement in VAS after primary surgery. The 5-year revision rate was 19.05%, and the mean time of revision surgery was 25.31 ± 17.11 months postoperatively. Nasal allergy (OR = 9.287; p = 0.011) and LMS (OR = 1.29; p = 0.06) were found to be the independent risk factors for revision surgery. The discriminatory power of LMS for revision surgery was acceptable (AUC = 0.79) with the best cutoff point located at LMS > 13.5. Patients with both nasal allergy and LMS≧14 had only half of revision-free survival in comparison to overall survival (38.1% vs. 80.95%, p < 0.001).ConclusionsIn patients with CRSwNP who have concurrent nasal allergy and higher preoperative LMS may indicate an advanced disease status and eventually be in a high risk of revision surgery after a long-term follow-up. An outcome-based staging system will be helpful in the future to improve the prognosis for CRSwNP.     

Allergy accelerates the disease progression of chronic rhinosinusitis

Background: The role of allergy in the development of chronic rhinosinusitis (CRS) in East Asians is not clear.

Aims/objectives: The aim was to investigate the impact of allergies in the clinical characteristics of chronic rhinosinusitis.

Material and methods: A total of 138 CRS patients who underwent endoscopic sinus surgery were included. A brief history of rhinosinusitis symptoms, blood eosinophil count, blood-specific allergen tests, computed tomography (CT) scan findings, Lund-Mackay (LM) CT scores, and Sino-Nasal Outcome Test (SNOT-22) Questionnaire scores, and sinoscopy findings at 3 and 6 months postoperatively.

Results: The ImmunoCAP test was positive in 71(51%) patients and negative in 67(49%) patients. The mean age of those who received endoscopic sinus surgery was 7-years younger in the allergic group compared with the non-allergic group (p?=?.008). The peripheral eosinophil count in the allergic group was higher than that of the non-allergic group (p?=?.008). The LM scores and SNOT-22 scores were not significantly different between the two groups. The recurrence rate of nasal polyps in the allergic group was higher but without statistical significance.

Conclusions and significance: Allergy may accelerate the disease progression of CRS. The presence of the serum-specific IgE was correlated with peripheral eosinophil percentage, especially in the CRSwNP patients.     

Chronic rhinosinusitis with nasal polyps is associated with decreased expression of mucosal interleukin 22 receptor

INTRODUCTION: Chronic rhinosinusitis with nasal polyps (CRSwNP) is an inflammatory disorder of the sinonasal mucosa that is frequently associated with microbial colonization. Innate defense mechanisms at the mucosal surface are critical in protecting the host from airborne environmental pathogens. Recent studies of skin and gastrointestinal tract inflammatory diseases have shown that stimulation of the interleukin-22 receptor (IL-22R1) nonspecifically increases innate immune responses. The potential role of IL-22R1 in the pathogenesis of CRSwNP has never been explored. STUDY DESIGN: Prospective. METHODS: Nine controls and 19 subjects with CRS were prospectively enrolled prior to undergoing endoscopic sinus surgery. Nasal epithelial cells were cultured from surgically obtained ethmoid mucosa and IL-22R1 protein expression was examined via flow cytometry. RNA was extracted from whole mucosal samples and real-time polymerase chain reaction (PCR) was employed to determine expression of IL22 and IL-22R1. Subjects were followed for at least 6 months postoperative to assess for recurrence or persistence of polyps. RESULTS: Flow cytometry demonstrated the expression of IL-22R1 protein on the surface of cultured nasal epithelial cells. IL-22R1 mRNA was expressed in 100% of the controls and CRSsNP. However, IL-22R1 was only expressed in 55% of patients with recalcitrant CRSwNP. Additionally, levels of IL22R1 were significantly lower in recalcitrant CRSwNP compared to controls and CRSsNP. IL22 levels did not reach statistical significance. CONCLUSIONS: In this study, we demonstrate IL-22R1 mRNA and protein expression on nasal epithelial cells. Failure of medical and surgical therapy in CRSwNP is associated with significantly decreased expression of IL-22R1. Further research is needed to determine the potential of IL-22R1 as a therapeutic target in CRSwNP.     

Notch通路在鼻息肉中的表达及其与调节性T细胞表达和嗜酸粒细胞浸润的相关性研究

目的:探讨Notch通路在鼻息肉中的表达及其与调节性T细胞（Treg细胞）表达和嗜酸粒细胞（Eos）浸润的相关性。方法:选择2012年11月至2018年8月期间在中山大学附属第三医院接受鼻内镜手术的慢性鼻窦炎（CRS）和鼻中隔偏曲的患者,分别作为CRS组和对照组。收集慢性鼻窦炎不伴鼻息肉（CRSsNP）患者（30例,男...     

淋巴细胞在慢性鼻-鼻窦炎组织中的表达及意义

目的：探讨B淋巴细胞（CD20）和T淋巴细胞亚群（CD4、CD8）在慢性鼻-鼻窦炎（CRs）中的表达及在炎症反应中的作用。方法：采用免疫组织化学技术检测B淋巴细胞（CD20）和辅助性T细胞（CD4）、细胞毒性T细胞（CD8）在实验组[分为15例CRS不伴鼻息肉（CRSsNP）组、12例CRS伴鼻息肉（CRSwNP）组、7例复发性CRSwNP组]和对照组（13例下鼻甲黏膜对照）中的表达。采用Mann-WhitneyU检验分析实验组和对照组B淋巴细胞、T淋巴细胞亚群的表达情况,实验组组间淋巴细胞浸润比较用单因素方差分析One—WayANOVA。结果：与对照组相比,实验组有明届的13淋巴细胞（CD20）和T淋巴细胞亚群（CD4、CD8）浸润（P〈0．05）：T淋巴细胞、亚群（CD4、CD8）在CRSwNP组和复发性CRSwNP组病变中的表达明显高于CRSsNP组（P〈0．05）;CD4在复发性CRSwNP组中的表达明显高于CRSwNP和CRSsNP组（P〈0．01）。结论：实验组鼻腔黏膜中B淋巴细胞、辅助性T细胞和细胞毒性T细胞高表达,均参与炎症的形成,其炎症匣应与T淋巴细胞浸润密切相关。     

鼻呼出一氧化氮对慢性鼻窦炎诊断的临床应用价值

目的 探讨鼻呼出一氧化氮(nNO)在慢性鼻窦炎(CRS)临床诊断中的应用价值。 方法 回顾性分析135例CRS患者及40例非CRS患者的临床资料,包括患者nNO水平的差异,nNO水平与年龄、BMI、外周血嗜酸性粒细胞计数及百分比、CT Lund-Mackay评分及E/M比值的相关性,通过Logistic回归及ROC曲线分析nNO在CRS中的诊断应用价值。 结果 CRS组、CRSsNP组及CRSwNP组的nNO水平显著低于非CRS组(P<0.001),CRSwNP组的nNO水平显著低于CRSsNP组(P<0.001);eCRSwNP组及non-eCRSwNP组患者的nNO水平显著低于非CRS组患者(P<0.001),eCRSwNP组的nNO水平显著低于non-eCRSwNP组患者(P<0.05)。CRS组和CRSwNP组nNO水平均与E/M比值及Lund-Mackay评分呈显著负相关性(r=-0.423, P<0.001;r=-0.650, P<0.001;r=-0.434, P<0.001;r=-0.608, P<0.001)。Logistic回归分析发现nNO水平与CRS分型显著相关(P<0.01)。nNO对鉴别非CRS与CRS、CRSsNP及CRSwNP具有中度预测价值(AUC=0.849,P<0.001;AUC=0.771,P<0.001;AUC=0.894,P<0.001),对鉴别CRSsNP与CRSwNP具有中度预测价值(AUC=0.776,P<0.01)。对鉴别非CRS与non-eCRSwNP具有中度预测价值(AUC=0.861,P<0.001),eCRSwNP具有高度预测价值(AUC=0.910,P<0.001)。 结论 nNO水平对CRS、CRSsNP和CRSwNP、eCRSwNP和non-eCRSwNP的初步诊断以及鼻息肉病变范围的预测具有一定的临床应用价值。     

Influencia de la premedicación con esteroides sistémicos en el sangrado y visualización del campo quirúrgico durante la cirugía endoscópica nasosinusal

IntroductionChronic rhinosinusitis (CRS) is the inflammation of the nasal and paranasal sinus mucosa persisting for at least 12 weeks. The success of endoscopic sinus surgery (ESS) depends on minimising oedema and intraoperative bleeding. For this purpose, some surgeons advocate the use of preoperative systemic steroids (SS).Our aim was to assess if the administration of preoperative SS in patients with CRS with or without nasal polyps (NP) facilitates the surgical procedure.MethodsNon-randomized clinical trial in CRS patients with or without NP. Patients in the ESS group received oral meprednisone preoperatively, whereas the control group did not. The visibility of the surgical field, intraoperative bleeding and surgery duration were recorded.ResultsEach group (SS group and control group) included 27 patients. The administration of SS reduced the values of all the parameters in patients without NP, with no significant differences. In patients with NP, only operative bleeding was reduced significantly.ConclusionsEven though all the parameters decreased with the preoperative administration of SS, only operative bleeding was significantly reduced in patients with CRS with NP.     

<Emphasis Type="Italic">Staphylococcus aureus</Emphasis> from patients with chronic rhinosinusitis show minimal genetic association between polyp and non-polyp phenotypes

Background

Staphylococcus aureus has a high prevalence in chronic rhinosinusitis (CRS) patients and is suggested to play a more etiopathogenic role in CRS patients with nasal polyps (CRSwNP), a severe form of the CRS spectrum with poorer surgical outcomes. We performed a microbial genome-wide association study (mGWAS) to investigate whether S. aureus isolates from CRS patients have particular genetic markers associated with CRS with nasal polyps (CRSwNP) or CRS without nasal polyps (CRSsNP).

Methods

Whole genome sequencing was performed on S. aureus isolates collected from 28 CRSsNP and 30 CRSwNP patients. A mGWAS approach was employed using large-scale comparative genomics to identify genetic variation within our dataset.

Results

Considerable genetic variation was observed, with >?90,000 single nucleotide polymorphisms (SNPs) sites identified. There was little correlation with CRS subtype based on SNPs and Insertion/Delection (Indels). One indel was found to significantly correlate with CRSwNP and occurred in the promoter region of a bacitracin transport system ATP-binding protein. Additionally, two variants of the highly variable superantigen-like (SSL) proteins were found to significantly correlate with each CRS phenotype. No significant association with other virulence or antibiotic resistance genes were observed, consistent with previous studies.

Conclusion

To our knowledge this study is the first to use mGWAS to investigate the contribution of microbial genetic variation to CRS presentations. Utilising the most comprehensive genome-wide analysis methods available, our results suggest that CRS phenotype may be influenced by genetic factors other than specific virulence mechanisms within the S. aureus genome.

     

慢性鼻窦炎伴鼻息肉与哮喘的相关性机制及治疗策略研究进展

慢性鼻窦炎伴鼻息肉(CRSwNP)和哮喘作为上下呼吸道最具代表性的慢性炎症性疾病,二者在发病过程中常相互并存,临床诊治棘手。目前对CRSwNP和哮喘的相互作用机制尚未阐明。欧洲鼻窦炎鼻息肉诊疗指南(EPOS 2012)对治疗CRSwNP伴或不伴哮喘已给出具体的指导意见,其常规治疗包括鼻用糖皮质激素、生理盐水洗鼻等,并进一步根据CRSwNP的特点、症状严重程度等进行后续的联合治疗。据报道,鼻窦手术和药物治疗CRSwNP对合并支气管哮喘的转归有益。但CRSwNP合并哮喘患者经药物与手术治疗后的疗效判定尚缺乏足够的随机对照试验证据。     

Indoleamine 2,3-dioxygenase expression is associated with chronic rhinosinusitis with nasal polyps and antrochoanal polyps

Chronic rhinosinusitis without and with nasal polyps (CRSwNP and CRSsNP), and antrochoanal polyps are different phenotypes with different pathomechanisms. Indoleamine 2,3-dioxygenase (IDO) is an enzyme expressed in many cells involved in the catabolism of the essential amino acid tryptophan to kynurenine. IDO might have a role in allergic airway inflammation. The aim was to evaluate if IDO expression is associated with CRSsNP, CRSwNP, or ACP. One hundred fifty specimens from the nasal cavity and sinus mucosa were immunohistochemically stained with mAb anti-IDO. The expression of epithelial and leukocyte IDO was associated with CRSwNP and ACP. The presence of ASA intolerance, asthma, atopy, smoking and use of medication did not significantly change the results. The different expression of IDO could putatively indicate the differences in the pathomechanisms of CRSsNP, CRSwNP and ACP. Further studies on the role of IDO in upper airways pathologies are required.     

金黄色葡萄球菌超抗原与慢性鼻窦炎鼻息肉发生相关性的研究

目的:探讨金黄色葡萄球菌(金葡菌)超抗原在鼻息肉发生中的作用。方法:对42例双侧鼻息肉患者(鼻息肉组)、27例单纯慢性鼻窦炎患者(鼻窦炎组)和12例无鼻窦疾病史的鼻外伤患者(对照组)的鼻腔分泌物进行细菌培养;采用酶联免疫吸附试验(ELISA)法检测各组患者的鼻黏膜或息肉组织中的金葡菌超抗原;在组织学上,对苏木精-伊红染色切片进行嗜酸粒细胞计数。结果:鼻腔分泌物中金葡菌阳性率鼻息肉组为7.1%,鼻窦炎组为3.7%,对照组为0,各组间差异均无统计学意义(均P>0.05)。ELISA结果显示:鼻息肉组金葡菌超抗原阳性率为54.76%,鼻窦炎组和对照组阳性率均为0。嗜酸粒细胞计数平均值:鼻息肉组23.94±13.88,鼻窦炎组0.29±0.51,对照组0.08±0.28,3组间均差异有统计学意义(均P<0.05)。鼻息肉组中ELISA结果阳性者嗜酸粒细胞水平比阴性者高,但差异无统计学意义(P>0.05)。结论:金葡菌超抗原与鼻息肉的发生存在相关性,有可能在鼻息肉的致病机制中起重要作用。