Macrophage mannose receptor in chronic sinus disease

BACKGROUND: The role of infectious agents in the onset and maintenance of chronic sinus disease is still not fully understood. Macrophage mannose receptor (MMR), an innate pattern recognizing receptor, capable of phagocytosis of invaders and signal transduction for proinflammatory mechanisms, might be of importance in immune interactions in chronic sinus disease. OBJECTIVE: We examined the MMR in sinonasal airway mucosa to evaluate its possible role in chronic rhinosinusitis (CS) and nasal polyposis (NPs). METHODS: Surgical samples from patients with sinonasal disease were investigated with real-time RT-PCR for quantification of MMR mRNA expression, and the presence and location of MMR-positive cells was analysed by immunohistochemistry. RESULTS: Quantification of MMR mRNA showed a statistically significant higher expression in NPs compared to CS without NP and controls. Immunohistochemistry revealed expression of MMR in all tissue samples; however, in NP we found an enhanced positive cellular staining including cell aggregates. CONCLUSIONS: We could demonstrate for the first time that the expression of MMR is significantly upregulated in NP compared to patients with CS without NP or turbinate tissue of controls. Macrophages expressing MMR, accumulated in cell aggregates in NPs, play a possible key role in pathogen-macrophage interaction in NP disease.     

Cell and cytokine profiles in nasal secretions from patients with nasal polyposis: effects of topical steroids and surgical treatment

BACKGROUND: Nasal polyposis (NP), a chronic inflammatory disease of the paranasal sinus mucosa, is frequently associated with asthma. Previous reports showed that surgical treatment for nasal polyps may influence asthma evolution. We hypothesized that sinus surgery may alter the cytokine network in nasal secretions. METHODS: We evaluated the characteristics (cells and mediators) of nasal lavages in nine patients with untreated NP (group A), 17 patients treated with topical steroids (group B), 21 patients treated by nasal surgery endonasal ethmoidectomy associated with topical steroids (group C), and 12 healthy subjects (controls). RESULTS: Percentages of both eosinophils and neutrophils were higher in NP patients than in controls. Percentages of eosinophils and interleukin-5 (IL-5) level were higher in group A than in group C and controls. There was a positive correlation between IL-5 and eosinophils. In marked contrast, IL-8, IL-10, and IL-1beta levels were significantly higher in group C than in groups A and B and controls; TNF-alpha concentration was significantly lower in group C than in groups A and B and controls; and there was a negative correlation between IL-10 and TNF-alpha. The percentage of eosinophils was higher in asthmatic patients with NP than in nonasthmatic patients. In addition, in group C, asthmatic patients also had a significantly higher level of IL-10 than nonasthmatic patients. CONCLUSIONS: Our study demonstrates that percentages of eosinophils and neutrophils, and IL-5 level were increased in nasal secretions from untreated patients with NP. Topical steroid treatment is associated with a decrease of inflammatory cells and mediators. In marked contrast, nasal surgery is associated with marked changes, in cytokine profile in nasal secretions, that are clearly different from those of controls and topical steroid-treated NP patients.     

Histamine concentrations in nasal secretion and secretory activity in allergic rhinitis

The prerequisites for using the assayed histamine concentration in nasal secretion as an objective measure of disease activity in allergic rhinitis were investigated. It was demonstrated that in histamine determination procedures the presence of quenching substances in the nasal secretion could lead to underestimation of the histamine concentration. This bias was eliminated in a modified spectrofluorometric assay. Only an insignificant fraction of the histamine in samples collected by nasal spray washing was bound to unfiltrable particles or cells. The mean histamine concentration in nasal secretions from 15 healthy subjects was 11.2 micrograms/ml and in a group of nine patients with allergic rhinitis out of season 3.36 micrograms/ml. The histamine concentration in the latter group decreased during the pollen season and after positive allergen challenge. It is suggested that this decrease is caused by the increase in volume of the secretion during the allergic response. The use of lithium as an exogenous marker permitted quantitation of the increase in the relative amount of nasal secretion recovered by washing in the symptomatic subjects.     

Relationships between allergic inflammation and nasal airflow in children with persistent allergic rhinitis due to mite sensitization

BACKGROUND: Allergic rhinitis is associated with Th2-dependent inflammation. Nasal obstruction is the most typical symptom in children with mite allergy. OBJECTIVES: The aim of this study was to evaluate the possible relationships among nasal symptoms, allergic inflammation, including inflammatory cells and cytokine pattern, and nasal airflow in children with persistent allergic rhinitis because of mite sensitization. METHODS: Twenty children (13 males and seven females, mean age 13.4 +/- 1.6 years) with persistent rhinitis because of mite allergy were evaluated. All of them had moderate-severe grade of nasal obstruction. Total symptom score (TSS), rhinomanometry, nasal lavage, and nasal scraping were obtained in all subjects. Inflammatory cells were counted by conventional staining; interleukin (IL)-5, and IL-8 were measured by immunoassay on fluids recovered from nasal lavage. RESULTS: Eosinophils were significantly associated with TSS (R = 74.4%, P = 0.0002), with IL-5 (R = 90.6%, P < 0.0001) and with nasal flow (R = -69%, P = 0.0007), but not with IL-8 (R = 0.1%, P = 0.995). Eosinophil levels were shown to independently predict nasal flow (P < 0.001), with flow decreasing linearly for increasing eosinophils, together with a significant effect of neutrophils (P = 0.016, linear increase in flow) and a borderline effect of IL-8 (P = 0.063, linear increase in flow). CONCLUSIONS: This study demonstrates the close association between IL-5 concentration and eosinophil infiltration. In addition, there is clear evidence concerning the relationship between eosinophil infiltration and nasal airflow. Thus, nasal eosinophils can be regarded as the most important predictor of upper airway function. These findings constitute first evidence of the relationship between nasal airflow impairment and Th2-related eosinophilic inflammation in children with persistent allergic rhinitis because of mite sensitization.     

Nasal nitric oxide is increased in allergic rhinitis

Background Nitric oxide (NO) plays a major role in the regulation of vascular tone and in non-specific host defence. The epithelium in the paranasal sinuses was recently identified as the major site of NO production in the upper airways. Objective To investigate NO status in allergic rhinitis, we compared the NO concentration in the nasal cavities of control subjects (n= 19) and in patients with allergic rhinitis (n= 36) with symptoms (WS, n= 17) or without symptoms (WOS, n= 19) on the day of the test. Methods NO concentration was measured using a chemiluminescent analyser aspiring from each nasal cavity at a sampling flow rate of 0.7L/min, before and 10min after administration of a nasal vasoconstrictor. Results The mean NO concentration (± se) in the control was 235 ± 11 ppb and 225 ± 9 ppb in the right and left nostrils respectively, and was decreased by 14% and 12% by the nasal vasoconstrictor (P < 0.001). The NO concentration in patients with allergic rhinitis was significantly higher in the right and left nostrils (382 × 20 ppb and 396 ± 28 respectively, P < 0.0001 versus control). All WOS patients demonstrated normal or increased NO concentrations in both nostrils, whereas two WS patients showed decreased NO concentrations in the left nostril. Inhalation of a nasal vasoconstrictor increased NO concentration by 6% and 27% in the right and left nostrils respectively in WS patients. Conclusion Nasal NO concentration is increased in patients with allergic rhinitis. Interestingly, patients without symptoms on the day of the test also showed a clear-cut increase in nasal NO production, which could reflect a permanent inflammation of the sinus mucosa.     

The Influence of Drugs on Nasal Ciliary Movement

Drugs in nasal preparations, for local use as well as for systemic use, should not interfere with the self-cleaning capacity of the nose, effectuated by the ciliary epithelium. Many drugs and additives, however, have a negative effect on nasal ciliary function. Examples of ciliotoxic agents are lipophilic and mercuric preservatives, local anesthetics, antihistamines, propranolol, and absorption enhancers such as the bile salts. Cholinergic drugs and -adrenergic drugs exert a ciliostimulatory effect. It is the purpose of this review to summarize the present knowledge of ciliotoxicity of drugs and additives and to give recommendations for the use of ciliofriendly drugs in nasal preparations.     

三维及多平面重建CT技术在鼻部整形中的应用价值分析

目的:分析在鼻部整形中三维及多平面重建CT技术的应用价值。方法:选择2018年2月~2019年7月本院收治的60例行鼻部整形的患者进行分析,所有患者均开展三维及多平面重建CT技术检测,结合检查结果,开展相应的隆鼻手术。分析术后不良反应、患者满意度。术后6个月,在CT测量下,检测前后鼻部解剖数据。结果:在鼻部整形中,三维及多平面重建CT技术的应用,可以准确了解鼻部结构,如观察侧鼻骨、鼻部皮肤、鼻根等情况。术后评价,患者对鼻部整形满意度较高,术后6个月,患者对鼻部整形满意度较高,术后与术后6个月患者鼻部满意度相比,无统计学意义,P>0.05。术后60例患者没有出现出血、切口感染等反应,同时也没有出现肋软骨外漏与倾斜等现象。经随访术后6个月发现1例患者的鼻背软骨出现轻度弯曲,但无明显表现,没有做特殊处理;其余患者,鼻部外形均表现为鼻尖挺拔、鼻背曲线流畅。结论:在鼻部整形中,应用三维及多平面重建CT技术,可以辅助提高隆鼻手术准确度,并在CT技术的引导下,准确植入自体肋软骨,可以为手术成功奠定基础,促使鼻唇与周围器官形态的协调性,进一步提高患者满意度。     

鼻息肉中嗜酸性粒细胞与上皮细胞增殖的相关性研究

目的：探讨嗜酸性粒细胞在鼻息肉发病机理中的意义。方法：用增殖细胞核抗原（PCNA）免疫组化方法对鼻息肉组织76例和正常鼻腔粘膜组织32例进行定量测定,同时对鼻息肉组织中嗜酸性粒细胞定量计数。结果：（1）鼻息肉上皮组织中PCNA阳性细胞表达数明显高于正常鼻腔粘膜（P＜0．001）,（2）嗜酸性粒细胞浸润程度与鼻息肉上皮细胞增殖相关（P＜0．05）。结论：上皮细胞增殖活跃在鼻息肉发病机理中占重要地位,而嗜酸性粒细胞的多少与其上皮细胞增殖相关,说明嗜酸性粒细胞与鼻息肉发病过程有直接相关性。     

丹参桐固体分散物的研究

应用聚乙烯吡喀烷酮（PVP）为载体,采用喷雾干燥制备了丹参酮（Tanshinone TAN)的固体分散物。测定了TAN原料药、固体分散物以及机械混合物的体外溶出度,并通过X－射线衍射、扫描电观察、以及用红光光谱和紫外光谱分析对固体分散物进行了研究。结果表明,TAN固体分散物的溶出度与TAN原料药和机械混合物相比有显著提高;TAN以超细态分散于载体中;TAN分子和载体分子之间未发生化学反应。     

Epistaxis

Epistaxis is a common problem that can affect the whole population. The majority of cases are self-limiting and do not require any medical intervention, but epistaxis can be associated with morbidity and even death in very rare circumstances. If epistaxis does not resolve with first aid measures, or episodes are frequent, patients may require specialist assessment and treatment by ENT, either in the outpatient clinic or via an unscheduled (emergency) admission to the hospital. Here, we provide an overview of the management of epistaxis in the outpatient setting and during an emergency admission in both paediatric and adult patients. We highlight the key considerations in the history and management, covering the common and rare conditions that are associated with epistaxis. This article provides an update from our previous article published in 2018 to include the more recent literature and a useful learning resource for examinations.