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Min JY, Huang JH, Norton JE, Suh LA, Price CP, Carter RG, Jung SY, Kim HS, Conley DB, Shintani-Smith S, Welch KC, Peters AT, Grammer LC, Stevens WW, Hulse KE, Kato A, Kern RC, Schleimer RP, Tan BK. IL-13 acidifies airway surface liquid pH via an omeprazole inhibitable mechanism. J Allergy Clin Immunol 2018. [DOI: 10.1016/j.jaci.2017.12.392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Jo A, Casale TB, Suh LA, Carter RG, Conley DB, Kern RC, Tan BK, Peters AT, Grammer LC, Schleimer RP, Cho SH. Mitochondrial Oxidative Stress Is Associated With Age-Related Glandular Remodeling And Nasal Polyp Formation. J Allergy Clin Immunol 2018. [DOI: 10.1016/j.jaci.2017.12.642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Kern RC, Stolovitzky JP, Silvers SL, Singh A, Lee JT, Yen DM, Iloreta AMC, Langford FPJ, Karanfilov B, Matheny KE, Stambaugh JW, Gawlicka AK. A phase 3 trial of mometasone furoate sinus implants for chronic sinusitis with recurrent nasal polyps. Int Forum Allergy Rhinol 2018; 8:471-481. [PMID: 29350840 PMCID: PMC5900893 DOI: 10.1002/alr.22084] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 12/06/2017] [Accepted: 12/14/2017] [Indexed: 12/18/2022]
Abstract
Background Topical intranasal corticosteroid sprays (INCSs) are standard treatment for nasal polyps (NPs), but their efficacy is reduced by poor patient compliance and impaired access of drug to the sinus mucosa. A corticosteroid‐eluting sinus implant was designed to address these limitations in patients with recurrent polyposis after sinus surgery by delivering 1350 μg of mometasone furoate (MF) directly to the ethmoid sinus mucosa over approximately 90 days. Methods A randomized, sham‐controlled, double‐blind trial was undertaken in 300 adults with refractory chronic rhinosinusitis with NPs (CRSwNP), who were candidates for repeat surgery. Eligible patients were randomized (2:1) and underwent in‐office bilateral placement of 2 implants or a sham procedure. All patients used the MF INCS 200 μg once daily. Co‐primary efficacy endpoints were the change from baseline in nasal obstruction/congestion score and bilateral polyp grade, as determined by an independent panel based on centralized, blinded videoendoscopy review. Results Patients treated with implants experienced significant reductions in both nasal obstruction/congestion score (p = 0.0074) and bilateral polyp grade (p = 0.0073) compared to controls. At day 90, implants were also associated with significant reductions in 4 of 5 prespecified secondary endpoints compared to control: proportion of patients still indicated for repeat sinus surgery (p = 0.0004), percent ethmoid sinus obstruction (p = 0.0007), nasal obstruction/congestion (p = 0.0248), and decreased sense of smell (p = 0.0470), but not facial pain/pressure (p = 0.9130). One patient experienced an implant‐related serious adverse event (epistaxis). Conclusion Significant improvements over a range of subjective and objective endpoints, including a reduction in the need for sinus surgery by 61%, suggest that MF sinus implants may play an important role in management of recurrent NP.
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Suresh K, Gouveia CJ, Kern RC, Cramer JD. The Association of External Transfer Status with Adverse Outcomes in Otolaryngology. Otolaryngol Head Neck Surg 2018; 158:848-853. [PMID: 29337650 DOI: 10.1177/0194599817753611] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Objective To compare rates of morbidity and mortality in patients treated by otolaryngologists who undergo interhospital transfers vs those who do not and to quantify conditions requiring interhospital transfers in this population. Study Design Cohort study. Setting American College of Surgeons National Surgical Quality Improvement Program. Subjects and Methods We identified patients requiring surgery by otolaryngologists in the National Surgical Quality Improvement Program database from 2006 to 2013. We compared patients who were transferred from an outside institution to those admitted from home. Multivariate regression was used to adjust for patient characteristics, comorbidities, and case mix. The primary outcome was overall morbidity and mortality within 30 days of surgery. Results We identified 60,498 patients; 488 (0.8%) were transferred from another institution. Operations that were more common in the transferred group were incision and drainage (24.0% vs 1.2%), facial trauma repair (9.0% vs 3.1%), and oropharyngeal hemorrhage control (3.9% vs 0.4%). External transfer patients had significantly longer hospital stays (44.1% vs 4.4% >7 days, P < .05). On unadjusted analysis, transferred patients had a significantly higher rate of morbidity and mortality (odds ratio [OR], 11.3; 95% confidence interval [CI], 9.4-13.5). On multivariate analysis, transferred patients had a significantly greater rate of morbidity and mortality (OR, 3.1; 95% CI, 2.4-4.0). Conclusion Transfer from another institution is associated with worse outcomes independent of case mix, demographics, and preoperative comorbidities in acute otolaryngology conditions requiring surgery. Practitioners should be aware of this when caring for transfer patients, and transfer status should be considered when measuring hospital quality.
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John Staniorski C, Price CPE, Weibman AR, Welch KC, Conley DB, Shintani-Smith S, Stevens WW, Peters AT, Grammer L, Lidder AK, Schleimer RP, Kern RC, Tan BK. Asthma onset pattern and patient outcomes in a chronic rhinosinusitis population. Int Forum Allergy Rhinol 2018; 8:495-503. [PMID: 29316300 DOI: 10.1002/alr.22064] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 09/29/2017] [Accepted: 10/25/2017] [Indexed: 01/28/2023]
Abstract
BACKGROUND Chronic rhinosinusitis (CRS) is strongly associated with comorbid asthma. This study compares early-onset and late-onset asthma in a CRS population using patient-reported and clinical characteristics. METHODS At enrollment into a clinical registry, CRS patients completed the 22-item Sino-Nasal Outcome Test (SNOT-22), Asthma Control Test (ACT), mini-Asthma Quality of Life Questionnaire (miniAQLQ), the 29-item Patient-Reported Outcomes Measurement Information System (PROMIS-29), and medication use questionnaires. Patients also reported comorbid asthma and age at first asthma diagnosis. Early-onset (<18 years) and late-onset (>18 years) asthma groups were defined. Analysis of variance (ANOVA), chi-square, and Kruskal-Wallis tests were used to compare patient responses. RESULTS A total of 199 non-asthmatic (56.1%), 71 early-onset asthmatic (20.0%), and 85 late-onset asthmatic (23.9%) CRS patients completed the survey. Body mass index (BMI) was significantly higher in late-onset asthmatic (p = 0.046) while age, gender, race, and smoking history did not differ with time of asthma onset. SNOT-22, ACT, and miniAQLQ were not different between asthma groups, but late-onset asthmatics had significantly lower physical function than non-asthmatics (p = 0.008). Compared to non-asthmatics, late-onset asthmatics showed increased rates of nasal polyps (p < 0.001), higher Lund-Mackay scores (p = 0.005), and had received more oral steroid courses (p < 0.001) and endoscopic surgeries (p = 0.008) for CRS management. Late-onset asthmatics compared to early-onset asthmatics showed increased nasal polyposis (p = 0.011) and oral steroid courses for CRS (p = 0.003). CONCLUSION While CRS-specific and asthma-specific patient-reported outcome measures (PROMs) were not significantly different among groups, CRS patients with late-onset asthma had poorer physical function, more frequent nasal polyposis, and required increased treatment for CRS. Late-onset asthma may predict more severe disease in CRS.
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Gouveia CJ, Zaghi S, Awad M, Camacho M, Liu SYC, Capasso R, Kern RC. Publication trends and levels of evidence in obstructive sleep apnea literature. Laryngoscope 2018; 128:2193-2199. [DOI: 10.1002/lary.27075] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Revised: 11/14/2017] [Accepted: 12/04/2017] [Indexed: 11/10/2022]
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Min JY, Nayak JV, Hulse KE, Stevens WW, Raju PA, Huang JH, Suh LA, Van Roey GA, Norton JE, Carter RG, Price CPE, Weibman AR, Rashan AR, Ghosn EE, Patel ZM, Homma T, Conley DB, Welch KC, Shintani-Smith S, Peters AT, Grammer LC, Harris KE, Kato A, Hwang PH, Kern RC, Herzenberg LA, Schleimer RP, Tan BK. Evidence for altered levels of IgD in the nasal airway mucosa of patients with chronic rhinosinusitis. J Allergy Clin Immunol 2017; 140:1562-1571.e5. [PMID: 28625807 PMCID: PMC5723216 DOI: 10.1016/j.jaci.2017.05.032] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Revised: 04/01/2017] [Accepted: 05/03/2017] [Indexed: 12/15/2022]
Abstract
BACKGROUND IgD is an enigmatic antibody isotype best known when coexpressed with IgM on naive B cells. However, increased soluble IgD (sIgD) levels and increased IgD+IgM- B-cell populations have been described in the human upper respiratory mucosa. OBJECTIVE We assessed whether levels of sIgD and IgD+ B cell counts are altered in nasal tissue from patients with chronic rhinosinusitis (CRS). We further characterized IgD+ B-cell populations and explored clinical and local inflammatory factors associated with tissue sIgD levels. METHODS sIgD levels were measured by means of ELISA in nasal tissues, nasal lavage fluid, sera, and supernatants of dissociated nasal tissues. IgD+ cells were identified by using immunofluorescence and flow cytometry. Inflammatory mediator levels in tissues were assessed by using real-time PCR and multiplex immunoassays. Bacterial cultures from the middle meatus were performed. Underlying medical history and medicine use were obtained from medical records. RESULTS sIgD levels and numbers of IgD+ cells were significantly increased in uncinate tissue (UT) of patients with chronic rhinosinusitis without nasal polyps (CRSsNP) compared with that of control subjects (4-fold, P < .05). IgD+ cells were densely scattered in the periglandular regions of UT from patients with CRSsNP. We also found that IgD+CD19+CD38bright plasmablast numbers were significantly increased in tissues from patients with CRSsNP compared with control tissues (P < .05). Among numerous factors tested, IL-2 levels were increased in UT from patients with CRSsNP and were positively correlated with tissue IgD levels. Additionally, supernatants of IL-2-stimulated dissociated tissue from patients with CRSsNP had significantly increased sIgD levels compared with those in IL-2-stimulated dissociated control tissue ex vivo (P < .05). Tissue from patients with CRS with preoperative antibiotic use or those with pathogenic bacteria showed higher IgD levels compared with tissue from patients without these variables (P < .05). CONCLUSION sIgD levels and IgD+CD19+CD38bright plasmablast counts were increased in nasal tissue of patients with CRSsNP. IgD levels were associated with increased IL-2 levels and the presence of pathogenic bacteria. These findings suggest that IgD might contribute to enhancement mucosal immunity or inflammation or respond to bacterial infections in patients with CRS, especially CRSsNP.
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Sundaresan AS, Hirsch AG, Young AJ, Pollak J, Tan BK, Schleimer RP, Kern RC, Kennedy TL, Greene JS, Stewart WF, Bandeen-Roche K, Schwartz BS. Longitudinal Evaluation of Chronic Rhinosinusitis Symptoms in a Population-Based Sample. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY-IN PRACTICE 2017; 6:1327-1335.e3. [PMID: 29133225 DOI: 10.1016/j.jaip.2017.10.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Revised: 10/03/2017] [Accepted: 10/12/2017] [Indexed: 12/14/2022]
Abstract
BACKGROUND Chronic rhinosinusitis (CRS) is a prevalent and disabling condition of the nose and sinuses. The natural history of CRS symptoms in a general population sample has not been previously studied. OBJECTIVE In a general population-based sample from Pennsylvania, we used 2 questionnaires mailed 6 months apart to estimate the prevalence of, and identify predictors for, stability or change in symptoms over time. METHODS We mailed the baseline and 6-month follow-up questionnaires to 23,700 primary care patients and 7,801 baseline responders, respectively. We categorized nasal and sinus symptoms using European Position Paper on Rhinosinusitis (EPOS) epidemiologic criteria. We defined 6 symptom groups over time on the basis of the presence of CRS symptoms at baseline and follow-up. We performed multivariable survey logistic regression controlling for confounding variables comparing persistent versus nonpersistent, recurrent versus stable past, and incident versus never. RESULTS There were 4,966 responders at follow-up: 558 had persistent symptoms, 190 recurrent symptoms, and 83 new symptoms meeting EPOS criteria for CRS. The prevalence of persistent symptoms was 4.8% (95% CI, 3.8-5.8), whereas the annual cumulative incidence of new symptoms was 1.9% and of recurrent symptoms was 3.2%. More severe symptoms at baseline were associated with persistence, whereas minor symptoms, allergies, and multiple treatments were associated with the development of new symptoms. CONCLUSIONS Less than half with nasal and sinus symptoms meeting CRS EPOS criteria in our general, regional population had symptom persistence over time, with symptom profiles at baseline and age of onset being strongly associated with stability of symptoms.
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Homma T, Kato A, Sakashita M, Takabayashi T, Norton JE, Suh LA, Carter RG, Harris KE, Peters AT, Grammer LC, Min JY, Shintani-Smith S, Tan BK, Welch K, Conley DB, Kern RC, Schleimer RP. Potential Involvement of the Epidermal Growth Factor Receptor Ligand Epiregulin and Matrix Metalloproteinase-1 in Pathogenesis of Chronic Rhinosinusitis. Am J Respir Cell Mol Biol 2017; 57:334-345. [PMID: 28398769 DOI: 10.1165/rcmb.2016-0325oc] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Chronic rhinosinusitis (CRS) is a heterogeneous chronic inflammatory disease of the nose and paranasal sinuses that presents without or with nasal polyps (CRSwNP). Notable features of CRSwNP are the frequent presence of type 2 allergic inflammation and high prevalence of Staphylococcus aureus (SA) colonization. As inflammation persists, sinus tissue undergoes epithelial damage and repair along with polyp growth, despite active medical management. Because one feature of damaged tissue is enhancement of growth factor signaling, we evaluated the presence of epidermal growth factor receptor (EGFR) ligands and matrix metalloproteinases (MMPs) in CRS. The objectives of this study were to analyze the expression of EGFR ligands and MMPs in patients with CRS and to investigate the possible role of SA on epithelial activation. Sinonasal tissues were collected during surgery from control subjects and patients with CRS. Tissues were processed as described previously for analysis of mRNA (RT-PCR) and proteins (ELISA) for the majority of EGFR ligands within the tissue extracts. CRS tissue was used for evaluation of the distribution of epiregulin (EREG), an EGFR ligand, and MMP-1 by immunohistochemistry. In parallel studies, expression of these genes and proteins was analyzed in cultured primary airway epithelial cells. Elevated expression of EREG and MMP-1 mRNA and protein was observed in uncinate and polyp tissue from patients with CRSwNP. Immunohistochemistry study of clinical samples revealed that airway epithelial cells expressed both of these proteins. Cultured primary human airway epithelial cells expressed MMP-1, and MMP-1 was further induced by stimulation with EREG or heat-killed SA (HKSA). The induction of MMP-1 by HKSA was blocked by an antibody against EREG, suggesting that endogenous EREG induces MMP-1 after stimulation with HKSA. EREG and MMP-1 were found to be elevated in nasal polyp and uncinate tissues in patients with CRSwNP. Elevated expression of EREG and MMP-1 may be related to polyp formation in CRS, and colonization of SA might further enhance this process.
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Takahashi T, Kato A, Berdnikovs S, Stevens WW, Suh LA, Norton JE, Carter RG, Harris KE, Peters AT, Hulse KE, Grammer LC, Welch KC, Shintani-Smith S, Tan BK, Conley DB, Kern RC, Bochner BS, Schleimer RP. Microparticles in nasal lavage fluids in chronic rhinosinusitis: Potential biomarkers for diagnosis of aspirin-exacerbated respiratory disease. J Allergy Clin Immunol 2017; 140:720-729. [PMID: 28238741 PMCID: PMC5568994 DOI: 10.1016/j.jaci.2017.01.022] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 12/09/2016] [Accepted: 01/05/2017] [Indexed: 12/17/2022]
Abstract
BACKGROUND Microparticles (MPs) are submicron-sized shed membrane vesicles released from activated or injured cells and are detectable by flow cytometry. MP levels have been used as biomarkers to evaluate cell injury or activation in patients with pathological conditions. OBJECTIVE We sought to compare MP types and levels in nasal lavage fluids (NLFs) from controls and patients with chronic rhinosinusitis without nasal polyps (CRSsNP), chronic rhinosinusitis with nasal polyps (CRSwNP), and aspirin-exacerbated respiratory disease (AERD). METHODS We collected NLFs from patients with CRSsNP (n = 33), CRSwNP (n = 45), and AERD (n = 31) and control (n = 24) subjects. Standardized flow cytometry methods were used to characterize the following MP types: endothelial MPs, epithelial MPs (epithelial cell adhesion molecule [EpCAM](+)MPs, E-cadherin(+)MPs), platelet MPs (CD31(+)CD41(+)MPs), eosinophil MPs (EGF-like module-containing mucin-like hormone receptor-like 1[EMR1](+)MPs), mast cell MPs (high-affinity IgE receptor [FcεRI](+)c-kit(+)MPs), and basophil MPs (CD203c(+)c-kit(-)MPs). Basophil activation was evaluated by the mean fluorescence intensity of CD203c on basophil MPs. RESULTS Activated mast cell MPs (CD137(+) FcεRI(+)c-kit(+)MPs) were significantly increased in NLFs of controls compared with NLFs of patients with CRSsNP (2.3-fold; P < .02), CRSwNP (2.3-fold; P < .03), and AERD (7.4-fold; P < .0001). Platelet MPs (3.5-fold; P < .01) and basophil MPs (2.5-fold; P < .05) were increased only in patients with AERD. Mean fluorescence intensity of CD203c on MPs was increased in patients with CRSwNP (P < .002) and AERD (P < .0001), but not in patients with CRSsNP. EpCAM(+)MPs in patients with CRSwNP were no different from control (P = .91) and lower than those in patients with CRSsNP (P < .02) and AERD (P < .002). CONCLUSIONS Based on released MPs, mast cells, platelets, and basophils were more highly activated in patients with AERD than in patients with CRS. Epithelial injury was lower in patients with CRSwNP than in patients with CRSsNP and AERD. MP analysis may help identify phenotypes of CRS, and in distinguishing AERD from CRSwNP.
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Weibman AR, Huang JH, Stevens WW, Suh LA, Price CPE, Lidder AK, Conley DB, Welch KC, Shintani-Smith S, Peters AT, Grammer LC, Kato A, Kern RC, Schleimer RP, Tan BK. A prospective analysis evaluating tissue biopsy location and its clinical relevance in chronic rhinosinusitis with nasal polyps. Int Forum Allergy Rhinol 2017; 7:1058-1064. [PMID: 28863237 DOI: 10.1002/alr.22005] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 07/13/2017] [Accepted: 08/01/2017] [Indexed: 12/24/2022]
Abstract
BACKGROUND Chronic rhinosinusitis with nasal polyps (CRSwNP) has a high propensity for recurrence. Studies suggest that eosinophilia influences disease severity and surgical outcomes, but the selection of sinonasal site for measuring eosinophilia has not been examined. The aim of this study was to investigate how region-specific tissue eosinophilia affects radiographic severity, comorbidity prevalence, and polyp recurrence risk following sinus surgery. METHODS Eosinophil cationic protein (ECP) levels in uncinate tissue (UT) and nasal polyp (NP) homogenates from 116 CRSwNP patients were measured using enzyme-linked immunosorbent assay (ELISA). Clinical history, radiographic severity, and time to polyp recurrence were obtained from electronic health records. The correlations between baseline Lund-Mackay scores and comorbidities were compared between UT and NP ECP levels. Cox regression and Kaplan-Meier analysis were then performed to assess whether UT or NP ECP better predicted recurrence. Censoring occurred at 4 years or at last follow-up if there was no endoscopic diagnosis of recurrent polyps. RESULTS Lund-Mackay scores were significantly correlated with UT and NP ECP (r = 0.46 and 0.26 respectively, p < 0.05). UT but not NP ECP was significantly higher in patients with asthma (p < 0.01) and aspirin-exacerbated respiratory disease (AERD) (p < 0.05). Polyp recurrence risk was only significantly higher for patients with eosinophilic UT tissue (hazard ratio [HR] = 2.84, p = 0.025). When measured in NP, eosinophilia did not predict recurrence. CONCLUSION Although ECP in NP was higher than in UT tissue, eosinophilia in UT tissue was a more clinically coherent biomarker of baseline radiographic severity, comorbid asthma and AERD, and prospective polyp recurrence risk than NP eosinophilia.
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Ference EH, Sindwani R, Tan BK, Chandra RK, Kern RC, Conley D, Smith SS. Open versus endoscopic medial orbital decompression: Utilization, cost, and operating room time. Am J Rhinol Allergy 2017; 30:360-6. [PMID: 27657902 DOI: 10.2500/ajra.2016.30.4350] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND The advent of endoscopic sinus surgery has created an exciting interface between rhinology and ophthalmology in the area of orbital and optic nerve decompression Objectives: (1) To study the utilization of open versus endoscopic medial orbital decompression based on geography and indication, (2) to describe the demographics of the patient populations who underwent these different techniques, and (3) to compare outcomes, including mean charges and operating room (OR) times Methods: Cases identified by Current Procedural and Terminology codes were extracted from the California, Florida, Maryland, and New York State Ambulatory Surgery Databases from 2009 to 2011. Patient demographics, diagnoses, mean charge, and OR time were compared. RESULTS A total of 1009 patients underwent orbital decompression; 93.0% of cases involved the medial wall only; 22.9% of medial decompressions were performed endoscopically, 74.5% were open, and 2.6% were via combined approach. Eighty percent of patients had thyroid eye disease. Analyses adjusted for sex, age, race, state, and diagnosis found that surgeries for infection (N = 47) were more likely to be performed endoscopically compared with procedures for other diagnoses (N = 962) (odds ratio 5.27 [2.67-10.40], p < 0.001). Patients in Florida were more likely to undergo endoscopic decompression compared with patients in California (odds ratio 2.35 [1.42-3.62]). The difference in median charge for endoscopic ($13,119) versus open ($11,291; p = 0.085) procedures was not significant on bivariate analysis but was significant on multivariate analysis (p = 0.04). The median OR time for open procedures was, on average, 33 minutes shorter (endoscopic, 132 minutes; open, 98 minutes; p ≤ 0.001) on bivariate analysis but was not significantly different when controlling for covariables (p = 0.08). CONCLUSION In the study sample, endoscopic orbital decompression was performed in 22.9% of patients, with significant variation in surgical technique based on geography and indication. Procedures that used endoscopic compared with open decompression techniques had no significant difference in charge on bivariate analysis. The OR time for open procedures was shorter on bivariate but not on multivariate analysis. Further research is required regarding the relative effectiveness of open versus endoscopic surgical techniques for various indications.
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Keswani A, Dunn NM, Manzur A, Kashani S, Bossuyt X, Grammer LC, Conley DB, Tan BK, Kern RC, Schleimer RP, Peters AT. The Clinical Significance of Specific Antibody Deficiency (SAD) Severity in Chronic Rhinosinusitis (CRS). THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY. IN PRACTICE 2017; 5:1105-1111. [PMID: 28132798 PMCID: PMC5503775 DOI: 10.1016/j.jaip.2016.11.033] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Revised: 10/28/2016] [Accepted: 11/22/2016] [Indexed: 11/30/2022]
Abstract
BACKGROUND Despite the increased identification of specific antibody deficiency (SAD) in chronic rhinosinusitis (CRS), little is known about the relationship between SAD severity and the severity and comorbidities of CRS. The prevalence of an impaired antibody response in the general population is also unknown. OBJECTIVE The objective of this study was to determine if the SAD severity stratification applies to real-life data of patients with CRS. METHODS An electronic health record database was used to identify patients with CRS evaluated for humoral immunodeficiency with quantitative immunoglobulins and Streptococcus pneumoniae antibody titers before and after pneumococcal vaccine. SAD severity was defined, according to the guidelines, based on the numbers of titers ≥1.3 μg/dL after vaccination: severe (≤2 serotypes), moderate (3-6 serotypes), and mild (7-10 serotypes). Comorbidities and therapeutic response were assessed. The prevalence of an impaired antibody response in a normal population was assessed. RESULTS Twenty-four percent of the patients with CRS evaluated for immunodeficiency had SAD, whereas 11% of a normal population had an impaired immune response to polysaccharide vaccination (P < .05). When evaluated by the practice parameter definition, 239 of 595 (40%) met the definition of SAD. Twenty-four (10%) had severe SAD, 120 (50%) had moderate SAD, and 95 (40%) had mild SAD. Patients with moderate-to-severe SAD had worse asthma, a greater likelihood of pneumonia, and more antibiotic courses in the 2 years after vaccination than patients with mild SAD. CONCLUSIONS This study provides real world data supporting stratification of SAD by severity, demonstrating a significant increase in the comorbid severity of asthma and infections in CRS patients with moderate-to-severe SAD compared with those with mild SAD and those without SAD.
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Pothoven KL, Norton JE, Suh LA, Carter RG, Harris KE, Biyasheva A, Welch K, Shintani-Smith S, Conley DB, Liu MC, Kato A, Avila PC, Hamid Q, Grammer LC, Peters AT, Kern RC, Tan BK, Schleimer RP. Neutrophils are a major source of the epithelial barrier disrupting cytokine oncostatin M in patients with mucosal airways disease. J Allergy Clin Immunol 2017; 139:1966-1978.e9. [PMID: 27993536 PMCID: PMC5529124 DOI: 10.1016/j.jaci.2016.10.039] [Citation(s) in RCA: 94] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 10/13/2016] [Accepted: 10/19/2016] [Indexed: 10/20/2022]
Abstract
BACKGROUND We have previously shown that oncostatin M (OSM) levels are increased in nasal polyps (NPs) of patients with chronic rhinosinusitis (CRS), as well as in bronchoalveolar lavage fluid, after segmental allergen challenge in allergic asthmatic patients. We also showed in vitro that physiologic levels of OSM impair barrier function in differentiated airway epithelium. OBJECTIVE We sought to determine which hematopoietic or resident cell type or types were the source of the OSM expressed in patients with mucosal airways disease. METHODS Paraffin-embedded NP sections were stained with fluorescence-labeled specific antibodies against OSM, GM-CSF, and hematopoietic cell-specific markers. Live cells were isolated from NPs and matched blood samples for flow cytometric analysis. Neutrophils were isolated from whole blood and cultured with the known OSM inducers GM-CSF and follistatin-like 1, and OSM levels were measured in the supernatants. Bronchial biopsy sections from control subjects, patients with moderate asthma, and patients with severe asthma were stained for OSM and neutrophil elastase. RESULTS OSM staining was observed in NPs, showed colocalization with neutrophil elastase (n = 10), and did not colocalize with markers for eosinophils, macrophages, T cells, or B cells (n = 3-5). Flow cytometric analysis of NPs (n = 9) showed that 5.1% ± 2% of CD45+ cells were OSM+, and of the OSM+ cells, 56% ± 7% were CD16+Siglec-8-, indicating neutrophil lineage. Only 0.6 ± 0.4% of CD45+ events from matched blood samples (n = 5) were OSM+, suggesting that increased OSM levels in patients with CRS was locally stimulated and produced. A majority of OSM+ neutrophils expressed arginase 1 (72.5% ± 12%), suggesting an N2 phenotype. GM-CSF levels were increased in NPs compared with those in control tissue and were sufficient to induce OSM production (P < .001) in peripheral blood neutrophils in vitro. OSM+ neutrophils were also observed at increased levels in biopsy specimens from patients with severe asthma. Additionally, OSM protein levels were increased in induced sputum from asthmatic patients compared with that from control subjects (P < .05). CONCLUSIONS Neutrophils are a major source of OSM-producing cells in patients with CRS and severe asthma.
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Poposki JA, Klingler AI, Stevens WW, Peters AT, Hulse KE, Grammer LC, Schleimer RP, Welch KC, Smith SS, Sidle DM, Conley DB, Tan BK, Kern RC, Kato A. Proprotein convertases generate a highly functional heterodimeric form of thymic stromal lymphopoietin in humans. J Allergy Clin Immunol 2017; 139:1559-1567.e8. [PMID: 27744031 PMCID: PMC5389936 DOI: 10.1016/j.jaci.2016.08.040] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Revised: 07/27/2016] [Accepted: 08/25/2016] [Indexed: 01/18/2023]
Abstract
RATIONALE Thymic stromal lymphopoietin (TSLP) is known to be elevated and truncated in nasal polyps (NPs) of patients with chronic rhinosinusitis and might play a significant role in type 2 inflammation in this disease. However, neither the structure nor the role of the truncated products of TSLP has been studied. OBJECTIVE We sought to investigate the mechanisms of truncation of TSLP in NPs and the function of the truncated products. METHODS We incubated recombinant human TSLP with NP extracts, and determined the protein sequence of the truncated forms of TSLP using Edman protein sequencing and matrix-assisted laser desorption/ionization-time of flight mass spectrometry. We investigated the functional activity of truncated TSLP using a PBMC-based bioassay. RESULTS Edman sequencing and mass spectrometry results indicated that NP extracts generated 2 major truncated products, TSLP (residues 29-124) and TSLP (131-159). Interestingly, these 2 products remained linked with disulfide bonds and presented as a dimerized form, TSLP (29-124 + 131-159). We identified that members of the proprotein convertase were rate-limiting enzymes in the truncation of TSLP between residues 130 and 131 and generated a heterodimeric unstable metabolite TSLP (29-130 + 131-159). Carboxypeptidase N immediately digested 6 amino acids from the C terminus of the longer subunit of TSLP to generate a stable dimerized form, TSLP (29-124 + 131-159), in NPs. These truncations were homeostatic but primate-specific events. A metabolite TSLP (29-130 + 131-159) strongly activated myeloid dendritic cells and group 2 innate lymphoid cells compared with mature TSLP. CONCLUSIONS Posttranslational modifications control the functional activity of TSLP in humans and overproduction of TSLP may be a key trigger for the amplification of type 2 inflammation in diseases.
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Poposki JA, Klingler AI, Tan BK, Soroosh P, Banie H, Lewis G, Hulse KE, Stevens WW, Peters AT, Grammer LC, Schleimer RP, Welch KC, Smith SS, Conley DB, Raviv JR, Karras JG, Akbari O, Kern RC, Kato A. Group 2 innate lymphoid cells are elevated and activated in chronic rhinosinusitis with nasal polyps. IMMUNITY INFLAMMATION AND DISEASE 2017; 5:233-243. [PMID: 28474861 PMCID: PMC5569375 DOI: 10.1002/iid3.161] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Revised: 03/14/2017] [Accepted: 03/20/2017] [Indexed: 12/20/2022]
Abstract
Background Chronic rhinosinusitis (CRS) with nasal polyps (CRSwNP) is characterized by type 2 inflammation with high levels of Th2 cytokines. Although T helper cytokines are released from T cells, innate lymphoid cells (ILC) are also known to produce high levels of the same cytokines. However, the presence of various types of ILC in CRS is poorly understood. Objective The objective of this study was to fully characterize the presence of all ILC subsets in CRS and to identify phenotypical differences of group 2 ILC (ILC2) in CRSwNP compared to ILC2 from non‐type 2 inflamed areas. Methods We investigated the presence of ILC subsets in peripheral blood mononuclear cells (PBMC) from healthy subjects, tonsil tissue, ethmoid tissue from control subjects and patients with non‐polypoid CRS (CRSsNP) and CRSwNP, as well as nasal polyp (NP) tissue from CRSwNP by flow cytometry. Sorted ILC2 were cultured in the presence and absence of IL‐33 and production of IL‐5 and IL‐13 was assessed by Luminex. Results We found that all ILC subsets were present in NP but ILC2 were dominant and significantly elevated compared to PBMC, tonsil, CRSsNP, and normal sinus tissue. We also found that inducible T‐cell co‐stimulator (ICOS) and side scatter were increased and CD127 was down‐regulated in ILC2 from NP compared to blood or tonsil ILC2. Thymic stromal lymphopoietin, IL‐7, and IL‐33 were able to down‐regulate expression of CD127 and increase side scatter in blood ILC2. Furthermore, sorted NP ILC2 but not blood ILC2 spontaneously released type 2 cytokines including IL‐5 and IL‐13. Conclusions and Clinical Relevance These results suggest that ILC2 are not only elevated but also activated in CRSwNP in vivo and that ILC2 may play important roles in the type 2 inflammation in CRSwNP.
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Gouveia CJ, Qureshi HA, Kern RC, Liu SYC, Capasso R. An assessment of online information related to surgical obstructive sleep apnea treatment. SLEEP SCIENCE AND PRACTICE 2017. [DOI: 10.1186/s41606-016-0007-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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93
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Feldman S, Kasjanski R, Poposki J, Hernandez D, Chen JN, Norton JE, Suh L, Carter RG, Stevens WW, Peters AT, Kern RC, Conley DB, Tan BK, Shintani-Smith S, Welch KC, Grammer LC, Harris KE, Kato A, Schleimer RP, Hulse KE. Chronic airway inflammation provides a unique environment for B cell activation and antibody production. Clin Exp Allergy 2017; 47:457-466. [PMID: 28000955 PMCID: PMC5378644 DOI: 10.1111/cea.12878] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Revised: 12/06/2016] [Accepted: 12/11/2016] [Indexed: 12/17/2022]
Abstract
BACKGROUND B cells play many roles in health and disease. However, little is known about the mechanisms that drive B cell responses in the airways, especially in humans. Chronic rhinosinusitis (CRS) is an inflammatory disease of the upper airways that affects 10% of Europeans and Americans. A subset of CRS patients develop nasal polyps (NPs), which are characterized by type 2 inflammation, eosinophils and group 2 innate lymphoid cells (ILC2s). We have reported that NP contain elevated levels of B cells and antibodies, making NP an ideal system for studying B cells in the airways. OBJECTIVE We sought to determine the mechanisms that drive B cell activation and antibody production during chronic airway inflammation. METHODS We analysed B cells from NP or tonsil, or after ILC2 coculture, by flow cytometry. Antibody production from tissue was measured using Luminex assays and the frequency of antibody-secreting cells by ELISpot. Formation of B cell clusters was assessed using immunohistochemistry. Expression of genes associated with B cell activation and class switch recombination was measured by qRT-PCR. RESULTS NP contained significantly elevated frequencies of plasmablasts, especially those that expressed the extrafollicular marker Epstein-Barr virus-induced protein 2 (EBI2), but significantly fewer germinal centre (GC) B cells compared with tonsil. Antibody production and the frequency of antibody-secreting cells were significantly elevated in NP, and there was evidence for local class switch recombination in NP. Finally, ILC2s directly induced EBI2 expression on B cells in vitro. CONCLUSIONS AND CLINICAL RELEVANCE Our data suggest there is a unique B cell activation environment within NP that is distinct from classic GC-mediated mechanisms. We show for the first time that ILC2s directly induce EBI2 expression on B cells, indicating that ILC2s may play an important role in B cell responses. B cell-targeted therapies may provide new treatment options for CRSwNP.
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Gouveia CJ, Kern RC, Liu SYC, Capasso R. The state of academic sleep surgery: A survey of United States residency and fellowship programs. Laryngoscope 2017; 127:2423-2428. [PMID: 28349537 DOI: 10.1002/lary.26572] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Revised: 01/12/2017] [Accepted: 02/07/2017] [Indexed: 11/08/2022]
Abstract
OBJECTIVES/HYPOTHESIS Our objectives were to describe otolaryngology residency programs' experience in and attitudes toward sleep surgery, and describe current otolaryngology sleep fellowships and their impact on future academic practice. STUDY DESIGN E-mail survey. METHODS A survey was e-mailed to program directors of 106 Accreditation Council for Graduate Medical Education-accredited otolaryngology residencies assessing resident sleep medicine experience, program satisfaction, and impact of sleep faculty. A separate survey was sent to directors of the seven sleep medicine otolaryngology fellowships. Frequency of graduates pursuing academic careers was examined. RESULTS Forty-six (43.4%) residency programs responded. Thirty-one (67.4%) have a faculty member with any time spent practicing sleep medicine or surgery. Nineteen (41.3%) have a faculty member with >50% dedicated sleep practice and/or who is board certified in sleep medicine. These programs were significantly more likely to respond "extremely" or "very" satisfied with resident sleep exposure than those without (P < .001). Most programs (69.6%) "strongly agreed" or "agreed" their program would benefit from a dedicated sleep surgeon; there was no significant difference in response rates between programs already with and those without dedicated sleep faculty. All fellowship directors responded. In the past 5 years these programs have trained 11 total fellows. Ten (90.9%) have remained in academic practice. CONCLUSIONS There is significantly increased satisfaction in resident sleep education at otolaryngology programs with dedicated sleep providers. Concurrently, there is strong program interest in sleep surgeons' involvement in resident training. Sleep fellowships are producing surgeons who pursue academic careers. This study provides support to training fellowship-specialized sleep surgeons and encouraging otolaryngology sleep faculty. LEVEL OF EVIDENCE NA Laryngoscope, 127:2423-2428, 2017.
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Lavin J, Min JY, Lidder AK, Huang JH, Kato A, Lam K, Meen E, Chmiel JS, Norton J, Suh L, Mahdavinia M, Hulse KE, Conley DB, Chandra RK, Shintani-Smith S, Kern RC, Schleimer RP, Tan BK. Superior turbinate eosinophilia correlates with olfactory deficit in chronic rhinosinusitis patients. Laryngoscope 2017; 127:2210-2218. [PMID: 28322448 DOI: 10.1002/lary.26555] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Revised: 01/02/2017] [Accepted: 01/27/2017] [Indexed: 11/11/2022]
Abstract
OBJECTIVE To evaluate if molecular markers of eosinophilia in olfactory-enriched mucosa are associated with olfactory dysfunction. STUDY DESIGN Cross-sectional study of tissue biopsies from 99 patients, and an additional 30 patients who underwent prospective olfactory testing prior to sinonasal procedures. METHODS Tissue biopsies were processed for analysis of inflammatory markers using quantitative real time polymerase chain reaction (qRT-PCR). Ipsilateral olfactory performance was assessed using the Sniffin' Sticks (Burghart, Wedel, Germany) threshold component and the University of Pennsylvania Smell Identification Test (Sensonics, Haddon Heights, NJ). Age-adjusted data was correlated with inflammatory marker expression and clinical measures of obstruction from computed tomography and endoscopy. RESULTS Gene expression of the eosinophil marker CLC (Charcot Leyden crystal protein) was elevated in superior turbinate (ST) tissue in chronic rhinosinusitis (CRS) with nasal polyps (CRSwNP) compared to ST and inferior turbinate tissue in CRS without nasal polyps (CRSsNP) and control patients (all P < 0.001, respectively). CLC in ST tissue was correlated with IL-5 and eotaxin-1 expression (all P < 0.001; P = 0.65, and 0.49, respectively). CLC expression was strongly correlated with eosinophilic cationic protein levels (P < 0.001; r = -0.76), and ST CLC expression was inversely related to olfactory threshold (P = 0.002, r = -0.57) and discrimination scores (P = 0.05, r = -0.42). In multiple linear regression of CLC gene expression, polyp status, and radiographic and endoscopic findings with olfactory threshold, CLC was the only significantly correlated variable (P < 0.05). CONCLUSION Markers of eosinophils are elevated in the ST of patients with CRSwNP and correlate with olfactory loss. These findings support the hypothesis that olfactory dysfunction in CRS correlates local eosinophil influx into the olfactory cleft. LEVEL OF EVIDENCE NA. Laryngoscope, 127:2210-2218, 2017.
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Stevens WW, Peters AT, Hirsch AG, Nordberg CM, Schwartz BS, Mercer DG, Mahdavinia M, Grammer LC, Hulse KE, Kern RC, Avila P, Schleimer RP. Clinical Characteristics of Patients with Chronic Rhinosinusitis with Nasal Polyps, Asthma, and Aspirin-Exacerbated Respiratory Disease. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY-IN PRACTICE 2017; 5:1061-1070.e3. [PMID: 28286156 DOI: 10.1016/j.jaip.2016.12.027] [Citation(s) in RCA: 143] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 11/28/2016] [Accepted: 12/20/2016] [Indexed: 12/22/2022]
Abstract
BACKGROUND Aspirin-exacerbated respiratory disease (AERD) comprises the triad of chronic rhinosinusitis with nasal polyps (CRSwNP), asthma, and intolerance to inhibitors of the cyclooxygenase-1 (COX-1) enzyme. The prevalence of AERD remains unclear, and few studies have compared the clinical characteristics of patients with AERD to those with CRSwNP alone, asthma alone, or both CRSwNP and asthma. OBJECTIVE To determine the prevalence of AERD within a tertiary care setting, and to identify unique clinical features that could distinguish these patients from those with both CRSwNP and asthma or with CRSwNP alone. METHODS Electronic medical records of patients at Northwestern in Chicago, Illinois, were searched by computer algorithm and then manual chart review to identify 459 patients with CRSwNP alone, 412 with both CRSwNP and asthma, 171 with AERD, and 300 with asthma only. Demographic and clinical features including sex, atopy, and sinus disease severity were characterized. RESULTS The prevalence of AERD among patients with CRSwNP was 16%. Patients with AERD had undergone 2-fold more sinus surgeries (P < .001) and were significantly younger at the time of their first surgery (40 ± 13 years) than were patients with CRSwNP (43 ± 14 years; P < .05). Atopy was significantly more prevalent in patients with AERD (84%) or asthma (85%) than in patients with CRSwNP (66%, P < .05). More patients with AERD (13%) had corticosteroid-dependent disease than patients with both CRSwNP and asthma (4%, P < .01) or asthma (1%, P < .001). CONCLUSIONS AERD is common among patients with CRSwNP; even though patients with AERD have CRSwNP and asthma, the clinical course of their disease is not the same as of patients who have CRSwNP and asthma but are tolerant to COX-1 inhibitors.
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Jo A, Chen J, Lockey RF, Suh LA, Carter RG, Conley DB, Kern RC, Tan BK, Peters AT, Grammer LC, Schleimer RP, Cho SH. Age-Related Differences in B-Cell Inflammatory Responses in Nasal Polyps. J Allergy Clin Immunol 2017. [DOI: 10.1016/j.jaci.2016.12.247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Tan BK, Klingler AI, Poposki JA, Stevens WW, Peters AT, Suh LA, Norton J, Carter RG, Hulse KE, Harris KE, Grammer LC, Schleimer RP, Welch KC, Smith SS, Conley DB, Kern RC, Kato A. Heterogeneous inflammatory patterns in chronic rhinosinusitis without nasal polyps in Chicago, Illinois. J Allergy Clin Immunol 2017; 139:699-703.e7. [PMID: 27639939 PMCID: PMC5303134 DOI: 10.1016/j.jaci.2016.06.063] [Citation(s) in RCA: 132] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 05/26/2016] [Accepted: 06/03/2016] [Indexed: 01/26/2023]
Abstract
CRSsNP is a heterogenous disease but type 2 inflammation in CRSsNP was more common than type 1 inflammation among patients in Chicago, Illinois. Distinct therapeutic strategies may be needed depending on the type of inflammation found in CRSsNP.
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Stevens WW, Hulse KE, Poposki JA, Suh LA, Norton J, Carter RG, Kato A, Grammer LC, Harris KE, Peters AT, Price CP, Conley DB, Kern RC, Smith SS, Tan BK, Welch KC, Schleimer RP. Basophil Activation in Aspirin Exacerbated Respiratory Disease. J Allergy Clin Immunol 2017. [DOI: 10.1016/j.jaci.2016.12.248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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100
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Kwah J, Stevens WW, Kern RC, Smith SS, Welch KC, Conley DB, Tan BK, Grammer LC, Yang A, Schleimer RP, Peters AT. Clinical Factors Associated with Acute Exacerbations of Chronic Rhinosinusitis. J Allergy Clin Immunol 2017. [DOI: 10.1016/j.jaci.2016.12.259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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