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PubMed2006

Endoscopic endonasal partial middle turbinectomy approach: adaptability of the procedure in a cadaveric study and in surgery for different sphenoid sinus and skull base lesions.

OBJECTIVE: To demonstrate the flexibility, adaptability, and efficacy of endoscopic endonasal removal of the inferior half of the middle turbinate in a cadaveric study and in surgery for the treatment of different sphenoid sinus and skull base lesions. METHODS: Anatomic Cadaveric Study: Five adult cadaveric heads were studied. Six nostrils of 3 cadavers were studied endoscopically after the lower half of the middle turbinate was removed. Two adult cadaveric heads underwent bilateral paraseptal sagittal sectioning and were studied after the lower half of the middle turbinate was removed. Sixty-five patients with different sphenoid sinus and skull base-related lesions were treated through this surgical approach. RESULTS: This approach increased surgical exposure, decreased tubular vision, and offered wider anatomic panoramic orientation with 0-degree and angled endoscopes. In the surgical group, there were no major intra- or postoperative complications. The approach improved exposure, accessibility to the lesion, and permitted good hemostasis, tumor resection, and repair of the skull base defect. CONCLUSION: The current approach provides a wide surgical field without increasing morbidity. It avoids unnecessary trauma to the other nostril as occurs in a binostril approach. The harvested piece of turbinate tissue is an excellent source of donor material for successful reconstruction of the sellar floor without inducing side effects or complications.

Journal Article↗
PubMed2006

Expression and localization of hepatocyte growth factor and its receptor c-Met in inverted papillomas.

CONCLUSIONS: The results suggest that elevated c-Met expression in combination with the co-expression of hepatocyte growth factor (HGF) in the epithelial cells of inverted papilloma may proliferate the epithelial cells of inverted papilloma. OBJECTIVES: HGF and its receptor, c-Met, have been identified in a variety of neoplastic and normal tissue types, implicating these factors in tissue regeneration and tumor progression. We investigated the expression and distribution of HGF and c-Met in normal nasal mucosa and inverted papilloma, to evaluate the possible influence of HGF and c-Met on the development of inverted papilloma. MATERIALS AND METHODS: Normal inferior turbinate mucosa and inverted papilloma were examined for expression of HGF and c-Met using RT-PCR, immunohistochemistry and Western blot analysis. RESULTS: Using immunohistochemistry, moderate to high levels of HGF and c-Met protein were localized in epithelial cells in inverted papillomas tested in the present study. In normal turbinate mucosa immunopositive HGF was detected in the submucosal glands where faint staining was found. However, c-Met was noted in the epithelial cells and submucosal glands of normal turbinate mucosa. RT-PCR and Western blot analysis showed that the expression levels of HGF and c-Met were increased in inverted papilloma in comparison with the normal turbinate mucosa.

Adult↗
PubMed2001

Characterization of nasal spray pumps and deposition pattern in a replica of the human nasal airway.

Deposition patterns are described of a nasal spray formulation for a novel rhinovirus protease inhibitor. These patterns, which were generated from different nasal spray pumps, were characterized using a multisectional nasal airway model. A human nasal replica was made from an in vivo magnetic resonance imaging (MRI) scan of an adult male human. The nasal replica consisted of 77 acrylic plastic sections, 1.5-mm thick. Our data showed that the aerosols were deposited mainly in the anterior and turbinate regions with little passing beyond the nasopharyngeal region. Detailed deposition information from the turbinate region indicated that deposition was high toward the anterior portion where most deposition was concentrated on the inferior meatus. Spray droplets were also deposited in spots of the middle and posterior portions of the turbinate region, and this nonuniform deposition pattern may be correlated with the flow pattern. The spray angle and droplet size of the nasal spray were found to be important in influencing the deposition pattern in the nasal airway. The droplet size was determined by a laser-diffraction technique and the spray angle by high-speed photography. Larger droplets and a wider spray angle increased deposition in the anterior region of the nasal airway, which prevented more material from depositing in the turbinate region.

Administration, Inhalation↗
PubMed1980

Influenza virus infection of newborn rats: virulence of recombinant strains prepared from influenza virus strain A/Okuda/57.

Infant rats were infected intranasally with wild influenza virus strains, attenuated strain A/Okuda/57 or recombinants prepared from these parents. The growth of viruses in the turbinates or lungs, and the ability of virus infections to potentiate subsequent bacterial infection by Haemophilus influenzae (HIb) were measured. The two wild strains of virus and a recombinant strain WRL105, known to be virulent for man, reached titres of 10(5.1)--10(6.5) EBID50/ml in the turbinates of infant rats 48 h after infections; infection by these viruses was followed by HIb bacteraemia in 77--92% and meningitis in 58--75% of animals. In contrast, virus strains known to be attenuated for man grew to lower titres in infant-rat turbinates and promoted a lower incidence of systemic infection by HIb than the virulent strains. A comparison of the various results of infection of infant rats with influenza virus strains of known pathogenicity for man indicated that the subsequent incidence of HIb bacteraemia was the most discriminating measurement of virus virulence; the range of yields of attenuated virus in rat turbinates overlapped that of virulent strains. These results, together with those of previous studies, indicate that the behaviour of influenza viruses in infant rats is an indication of virus virulence for man, and could provide a test of virulence that would facilitate the development of live attenuated virus vaccines for human use.

Animals↗
PubMed1990

A comparison of different challenge methods for induction of atrophic rhinitis in pigs.

Transmission and development of atrophic rhinitis (AR) was studied in 5- to 15-week-old pigs (Groups 2-7) originating from a herd free of AR, and compared to unexposed healthy pigs (Group 1), and pigs from a herd with endemic AR (Group 8). At the start of the trial, pigs in Groups 2-5 were challenged intranasally twice a week for 3 weeks with pure cultures of bacteria originating from the endemic AR herd: Nontoxigenic Pasteurella multocida type A (PmA) plus Bordetella bronchiseptica phase I (Bb) (Group 2); PmA + toxigenic Pm type D (PmD) (Group 3); PmD only (Group 4); and PmD + Bb (Group 5). Group 6 pigs were challenged with nasal wash of pigs from the endemic AR herd, and Group 7 pigs were challenged by being housed together in the same pen with Group 8 pigs throughout the study. Nasal swabs of all pigs were cultured 5 times during the study. Serum was collected at 6 weeks post challenge. Average daily gain (ADG) and turbinate lesions (turbinate gross lesions by visual scoring and by Turbinate Perimeter Ratio, TPR, scoring, and histopathological lesions) were measured at the time of slaughter at 15 weeks of age. Mean TPR value for the Group 1 pigs was 1.64, which was significantly (P less than 0.05) different from the mean TPR value of 0.58 for the pigs from the endemic AR herd (Group 8), the 0.79 value for Group 6 pigs, and 1.03 value for Group 7 pigs. Of pigs challenged with pure bacterial cultures, only Group 5 (PmD + Bb) developed significant AR (mean TPR = 1.24). Only one pig in each of Groups 2 and 3, and two pigs in Group 4 showed TPR values indicative of AR (TPR less than 1.30). However, histopathological examination showed that those pigs were recovering from the infection 7 weeks post challenge. Constant exposure to certain bacteria or other factors in nasal washings, stress of crowding or poor environmental conditions might be required to experimentally produce AR in 5-week and older pigs similar to that in naturally infected pigs. There was no relationship between turbinate lesions and the isolation frequency or quantity of PmA, PmD, or Bb. Antibody levels against PmA or PmD had moderate to high correlation with TPR values (r = -0.694 and -0.503 respectively). ELISA values also corresponded well with the type of bacteria inoculated in each group of pigs and appeared to be a sensitive test for PmA, PmD, and Bb infections in pigs.(ABSTRACT TRUNCATED AT 400 WORDS)

Animals↗
PubMed2005

Computed tomography as an aid in the diagnosis of chronic nasal disease in dogs.

OBJECTIVES: To assess the use of computed tomography (CT) in the diagnosis of chronic nasal disease in dogs. METHODS: A retrospective study of 85 dogs with chronic nasal discharge due to primary nasal disease, which had undergone nasal CT and biopsy, was carried out. Medical records were reviewed for signalment, clinical signs, CT findings, endoscopic findings and histopathology. The results obtained via CT were correlated with nasal histopathology and gross anatomical observations were recorded at the time of rhinoscopy. RESULTS: Neoplasia was diagnosed in 37 dogs for which CT typically revealed a soft tissue density associated with extensive turbinate destruction. Inflammatory rhinitis was diagnosed in 40 dogs. CT disclosed either normal turbinate structures or mild to moderate turbinate destruction, with or without the presence of soft tissue densities (mucopus) within the nasal passages. Fungal rhinitis was diagnosed in seven dogs for which CT disclosed extensive turbinate destruction with hyperlucency of the nasal passages. One dog had normal CT and histopathology findings. CLINICAL SIGNIFICANCE: CT greatly enhanced the ability to diagnose chronic nasal disease in dogs, providing detailed Information regarding the extent of the disease, accurate discrimination of neoplastic versus non-neoplastic diseases, and identification of areas of the nose to examine rhinoscopically and suspicious regions to target for biopsy.

Animals↗
PubMed1995

Numerical simulation of airflow in the human nasal cavity.

An anatomically correct finite element mesh of the right human nasal cavity was constructed from CAT scans of a healthy adult nose. The steady-state Navier-Stokes and continuity equations were solved numerically to determine the laminar airflow patterns in the nasal cavity at quiet breathing flow rates. In the main nasal passages, the highest inspiratory air speed occurred along the nasal floor (below the inferior turbinate), and a second lower peak occurred in the middle of the airway (between the inferior and middle turbinates and the septum). Nearly 30 percent of the inspired volumetric flow passed below the inferior turbinate and about 10 percent passed through the olfactory airway. Secondary flows were induced by curvature and rapid changes in cross-sectional area of the airways, but the secondary velocities were small in comparison with the axial velocity through most of the main nasal passages. The flow patterns changed very little as total half-nasal flow rate varied between resting breathing rates of 125 m/s and 200 ml/s. During expiration, the peaks in velocity were smaller than inspiration, and the flow was more uniform in the turbinate region. Inspiratory streamline patterns in the model were determined by introducing neutrally buoyant point particles at various locations on the external naris plane, and tracking their path based on the computed flow field. Only the stream from the ventral tip of the naris reached the olfactory airway. The numerically computed velocity field was compared with the experimentally measured velocity field in a large scale (20x) physical model, which was built by scaling up from the same CAT scans. The numerical results showed good agreement with the experimental measurements at different locations in the airways, and confirmed that at resting breathing flow rates, airflow through the nasal cavity is laminar.

Adult↗
PubMed1996

Synergistic role of gaseous ammonia in etiology of Pasteurella multocida-induced atrophic rhinitis in swine.

One-week-old Large White piglets were weaned and allocated to 14 experimental groups, each composed of five animals. Each group was housed in a separate Rochester exposure chamber and exposed continuously to gaseous ammonia at either 0, 5, 10, 15, 25, 35, or 50 ppm (two groups per exposure level). One week after ammonia exposure commenced, the pigs from one group at each exposure level were inoculated intranasally with 9 x 10(7) CFU of Pasteurella multocida type D. After a further 4 weeks of exposure, all the pigs were euthanized and the extent of turbinate degeneration was assessed by using a morphometric index (J.T. Done, D. H. Upcott, D. C. Frewin, and C. N. Hebert, Vet. Rec. 114:33-35, 1984) and a subjective scoring system (Ministry of Agriculture, Fisheries and Food, Atrophic Rhinitis: a System of Snout Grading, 1978). Exposure to ammonia at a concentration of 5 ppm or greater resulted in a significant increase in the severity of turbinate atrophy induced by P. multocida compared with that occurring in pigs kept in 0 ppm of ammonia. This effect was maximal at 10 ppm but decreased progressively at concentrations above 25 ppm. Regression analysis revealed a significant relationship between the severity of turbinate degeneration and the number of P. multocida organisms isolated from the nasal epithelium at the end of the experiment (R2 = 0.86). These findings suggest that exposure to ammonia facilitates the growth and/or survival of P. multocida within the upper respiratory tract of the pig, thereby contributing to the severity of the clinical disease atrophic rhinitis. Furthermore, exposure of pigs to ammonia at 10 ppm or greater, in the absence of either P. multocida or Bordetella bronchiseptica, induced a mild but statistically significant degree of turbinate atrophy. The findings of this study demonstrate that exposure to ammonia, at concentrations within the range encountered commonly in commercial piggeries, contributes to the severity of clinical lesions associated with atrophic rhinitis.

Ammonia↗
PubMed1984

Epidemiological study of Pasteurella multocida and Bordetella bronchiseptica in atrophic rhinitis.

An epidemiological study of atrophic rhinitis was carried out in four pig herds. Observations were made of (i) infection with Bordetella bronchiseptica and Pasteurella multocida, (ii) the presence of brachygnathia superior (BS score), (iii) the extent (grade) of turbinate atrophy and pneumonia at slaughter and (iv) growth rates from two to 16 weeks of age and average daily weight gains to slaughter. In two of the herds with no history of atrophic rhinitis, B bronchiseptica and non-toxigenic strains of P multocida were isolated; only one of 47 pigs (2 per cent) had a BS score greater than +10 mm and the most severe turbinate atrophy observed in 21 pigs at slaughter was grade 3. In contrast, from two herds with atrophic rhinitis, toxigenic strains of P multocida were isolated as well as B bronchiseptica and non-toxigenic P multocida. BS scores of greater than +10 mm were present in six of 47 pigs (13 per cent) of which five were infected with toxigenic P multocida and had severe turbinate atrophy of grade 4 or 5. There was no significant reduction in growth rates in the affected compared with the unaffected herds nor in the affected compared with the unaffected pigs in the same herd. Neither was there a correlation between progressive disease and the extent of pneumonia found at slaughter. It was concluded that in field cases of the disease, high BS scores plus severe turbinate atrophy were associated with infection by toxigenic type-D strains of P multocida.

Animals↗
PubMed1995

Mucosal inherent activity patterns in the rat: evidence from voltage-sensitive dyes.

1. Fluorescence changes in the dye di-4-ANEPPS were monitored on the rat's nasal septum and medial surface of the turbinates in response to odorant stimuli. For each mucosal surface a 6.0 x 6.0-mm area was sampled at 100 contiguous sites with a 10 x 10 photodiode array. The odorants were propyl acetate, 2-propanol, citral, L-carvone and ethylacetoacetate, each presented at a low and high concentration. 2. Like previous work using optical recording techniques and potential-sensitive dyes on the amphibian epithelium, the fluorescence signals elicited by odorant stimuli in the rat preparation were nearly identical in shape, time course, and response characteristics as the electroolfactogram (EOG). As with the EOG, a response could only be recorded in the presence of odorant stimuli (that is, no response was detected when nonodorized, humidified air was presented as the stimulus); the amplitude depended on odorant concentration, and the response was abolished both by ether and Triton X-100. 3. Although the entire expanse of each sampled tissue (i.e., septum and medial surface of the turbinates) responded to stimulation with each odorant, each stimulus induced a distinct spatial pattern of activity that was independent of odorant concentration and consistent from animal to animal. Furthermore, the spatial activity patterns recorded for the septum were mirror images of those recorded from the medial surface of the turbinates. 4. Formal statistical analysis of the loci of maximal activity or "hot spot" indicated highly significant effects of the odorants for both the septum and medial surface of the turbinates. 5. The results of these studies give further support to the hypothesis that odorant quality is encoded by differential spatial activity patterns in the olfactory epithelium that are characteristic of different odorants.

Animals↗
PubMed2006

Expression profile of immune-associated genes in nasal polyps.

OBJECTIVES: We performed this study to investigate the expression profile of immune-associated genes and to probe the role of related genes in the immune pathogenesis of nasal polyps. METHODS: Microarray analysis was used to find the expression profile of 491 immune-associated genes in nasal polyps. In validation studies, immunohistochemical staining and Western blot analysis were used to detect interleukin (IL)-17 and IL-17 receptor (IL-17R) in nasal polyps and controls. RESULTS: Eighty-seven genes were differentially expressed in the immune-associated gene profile of nasal polyps, and 15 genes showed differential expression in both chips. In nasal polyp tissues, IL-17 was expressed mainly in the cytoplasm of plasma cells and to a lesser degree in the prickle cell layer of the epithelium and the acinus of the serous gland. In turbinates, IL-17 was also expressed in the same location, but the expression of IL-17 in nasal polyps and that in turbinates differed significantly (p < .05). Both IL-17 and IL-17R displayed specific bands in nasal polyps and turbinates, but the bands of IL-17 and IL-17R in nasal polyps were stronger than those in turbinates. CONCLUSIONS: The differentially expressed genes in immune-associated gene chips will provide clues about, and a theoretical foundation for, the pathogenesis of nasal polyps. Furthermore, IL-17 may play an important role in the occurrence of nasal polyps by overexpression.

Adult↗
PubMedDate not supplied

Nasal endoscopy in congenital dacryocystitis.

PURPOSE: Controversy exists regarding the relationship between nasal pathology and congenital dacryocystitis. The recent advent of nasal endoscopes has greatly improved visualization of deep and hidden areas of nasal anatomy and has led to the elaboration of nasal anatomical variants and pathologies that were previously unknown. The current study aimed to evaluate for associations, if any, between anatomical abnormalities or variations in the lateral nasal wall and the presence and resolution of congenital dacryocystitis. PATIENTS AND METHODS: Phase I was a case-control study that compared the incidence of a predefined set of nasal endoscopic variations in infants with congenital dacryocystitis versus normal infants. Phase II was a cohort study that evaluated the impact of nasal endoscopic variations on the effectiveness of conservative treatment for congenital dacryocystitis. "Failure" to respond to conservative treatment measures was defined as the persistence of symptoms at the first birthday. RESULTS: Inferior turbinate hypertrophy and inferior meatal narrowing were significantly more frequent in the case group than in the control group. Conservative treatment measures resulted in 70 of 83 resolved cases on subsequent follow-up. The occurrence of inferior turbinate hypertrophy or inferior meatal narrowing at final examination was associated with non-resolution. The relative risk of non-resolution with inferior turbinate hypertrophy or inferior meatal narrowing was 7.7 (confidence interval, 2.32 to 25.72) and 12 (confidence interval, 3.7 to 39.2), respectively. CONCLUSION: Inferior turbinate hypertrophy and inferior meatal narrowing are more frequent in cases of congenital dacryocystitis. They are predictive of a poor outcome when congenital dacryocystitis is treated with conservative measures. This information should be considered when making clinical decisions for patients with congenital dacryocystitis.

Case-Control Studies↗
PubMedDate not supplied

Plain radiological profile of paranasal sinuses in chronic nasal diseases in University of Port Harcourt Teaching Hospital.

BACKGROUND: The paranasal sinuses can get affected by chronic diseases that maybe mitotic, bacterial, fungal and allergic. Plain x-rays, sinoscopy, tomograms, ultrasound scan, CT-scan and magnetic resonance imaging (MRI) technique are some of the means by which the sinus can be evaluated and a diagnosis made. The aim of this study is to evaluate the plain radiological findings of the paranasal Sinuses in-patient with chronic nasal diseases in the University of Port Harcourt Teaching hospital. METHODS: This is a prospective study of patients seen at the otorhinolaryngology out patient clinic of the university of Port Harcourt Teaching Hospital from August 2002 to November 2003. All patients with symptoms suggestive of nasal or paranasal sinus disease of more than 8 weeks duration were evaluated for the study. All the patients had plain radiographs in the occipito-mental, occipito-frontal and lateral views. A radiologist interpreted the x-rays. RESULTS: A total of 66 patients were seen with a male to female ratio of 1: 1.4. Ages of patients ranged from 17 years to 65 years. 72.7% had chronic infective sinusitis, 9.1% had vasomotor rhinitis and 6.1% had allergic rhinitis. Plain x-rays showed engorged turbinates due to allergy in 43.9% of patients, chronic sinusitis with engorged turbinates in 15.1%, engorged turbinates in 13.6%, chronic sinusitis in 10.6% and opaque nasal fossa in 6.1%. The maxillary sinus was most commonly involved site of disease as seen in (71.2%) of patients. The sphenoid sinus was the least involved (7.4%). Thirteen patients (19.7%) did not show any changes in the sinus x-rays. CONCLUSION: Chronic sinusitis is the commonest chronic nasal disease. Engorged nasal turbinate was the commonest plain x-ray finding. The maxillary sinus was the most commonly diseased sinus. In 19.7%, the plain radiograph was normal. Plain radiographs are a cheap and readily available tool for the investigation of diseases of the paranasal sinuses with good results in this environment.

Adolescent↗
PubMed2002

Utilisation of energy from digester gas and sludge incineration at Hamburg's Köhlbrandhöft WWTP.

At Hamburg's Köhlbrandhöft WWTP the demand for external energy supply is minimised by state of the art sludge treatment. The sludge is subjected to thickening, anaerobic digestion, dewatering, drying and incineration. The digester gas is used in a combined gas and steam turbine process. The sludge incineration also produces steam, which is also used in the steam turbine that follows the gas turbine. The turbines produce electricity, partially expanded steam is used for the sludge drying process. Heat from the condensation of vapours from sludge drying is used to heat the anaerobic digesters. The overall process requires no external heat or fuel and produces 60% of the WWTP's electricity demand.

Bacteria, Anaerobic↗
PubMed2000

[The significance and expression of vascular endothelial growth factor on nasal inverted papillomas].

OBJECTIVE: To determine the expression of vascular endothelial growth factor (VEGF) and its receptor in nasal inverted papillomas (NIP) and to clarify the function of VEGF in the establishment of NIPs. METHOD: VEGF and its receptor, fetal liver kinase-1 (flk-1) expression were examined by immunohistochemistry using SP method in sections of NIPs from 11 patients and inferior turbinates from 6 patients with chronic simple rhinitis. An automatic image analyzer was used to detect the staining results. Gray scale, a half-quantitative parameter, was used to describe the expression of VEGF and flk-1. RESULT: It showed that all the epithelium in NIPs, together with vascular and stroma adjacent to the epithelium, expressed different degree of VEGF. The VEGF expression in epithelium was significantly stronger in NIPs than that in inferior turbinates (P < 0.001). The expressions of both VEGF and flk-1 in vascular endothelium were more intense in NIPs than that in inferior turbinates (P < 0.001, P < 0.001). Flk-1 positive expression was observed in epithelium of NIPs but not in inferior turbinates. CONCLUSION: The results suggest that VEGF participate in the growth of NIPs, part of which shows the characteristics of containing plenty of blood vessels and being bloody in operation. The enhanced expression of VEGF may also play a key role in the development of edematous stroma. The expression degree of VEGF in the epithelium may be identified as one of the parameters of judging the propensity of NIPs' malignant transformation.

Aged↗
PubMedDate not supplied

Do centrioles generate a polar ejection force?

A microtubule-dependent polar ejection force that pushes chromosomes away from spindle poles during prometaphase is observed in animal cells but not in the cells of higher plants. Elongating microtubules and kinesin-like motor molecules have been proposed as possible causes, but neither accounts for all the data. In the hypothesis proposed here a polar ejection force is generated by centrioles, which are found in animals but not in higher plants. Centrioles consist of nine microtubule triplets arranged like the blades of a tiny turbine. Instead of viewing centrioles through the spectacles of molecular reductionism and neo-Darwinism, this hypothesis assumes that they are holistically designed to be turbines. Orthogonally oriented centriolar turbines could generate oscillations in spindle microtubules that resemble the motion produced by a laboratory vortexer. The result would be a microtubule-mediated ejection force tending to move chromosomes away from the spindle axis and the poles. A rise in intracellular calcium at the onset of anaphase could regulate the polar ejection force by shutting down the centriolar turbines, but defective regulation could result in an excessive force that contributes to the chromosomal instability characteristic of most cancer cells.

Algorithms↗
PubMed2005

[Expression of hypoxia-inducible factor-1alpha in nasal polyps and its correlation with vascular endothelial growth factor and inducible nitric oxide synthase].

OBJECTIVE: To detect the expression and distribution of hypoxia-inducible factor-1alpha (HIF-1alpha) in nasal polyps, to explore the relationship of HIF-1alpha with vascular endothelial growth factor (VEGF) and inducible nitric oxide synthase (iNOS), and to investigate the role of HIF-1alpha in the pathogenetic mechanism of nasal polyps. METHODS: Using the techniques of immunohistochemistry and reverse transcription polymerase chain reaction, the expressions of HIF-1alpha, VEGF, iNOS protein and HIF-1alpha mRNA were examined. The specimens were obtained from patients underwent SMR surgery during the same period, including thirty-one nasal polyps and ten inferior turbinate tissues. RESULTS: According to immunohistochemical research, the expressions of HIF-1alpha, VEGF and iNOS were higher in nasal polyps than those in inferior turbinate tissue (P < 0.01); The result of RT-PCR showed that there was no significant difference between the expression of HIF-1alpha mRNA in nasal polyps and inferior turbinate tissues (P > 0.05); No correlation was found between the expression of HIF-1alpha and the clinical stages of nasal polyps (F = 0.42, P > 0.05); There was a positive correlation between the expression of HIF-1alpha and that of VEGF (r = 0.630, P < 0.05). No significant correlation was found between the expression of HIF-1alpha and that of Inos (r = 0.144, P > 0.05). CONCLUSIONS: Although the mRNA level of HIF-1alpha did not change much, the expression of its protein was significantly higher in nasal polyps than in inferior turbinate tissues. There was no correlation between the expression of HIF-1alpha and the clinical stages. A positive correlation was found between HIF-1alpha and VEGF, but no correlation was detected between the HIF-1alpha and iNOS. In conclusion, our study indicates that hypoxia may play an important role in the pathogenetic mechanism of nasal polyps.

Adolescent↗
PubMed2005

[Expression and significance of interleukin-17 and its receptor in nasal polyps].

OBJECTIVE: To detect the expression and distribution of interleukin-17 and interleukin 17 receptor (IL-17R) in nasal polyps and to probe into their significance in the pathology of nasal polyps. METHODS: The methods of immunohistochemical staining and western blot were used to detect IL-17 and IL-17R in nasal polyps and controls. RESULTS: In nasal polyp tissues, IL-17 expressed mainly in cytoplasm of plasm cell, less in prickle-cell layer of the epithelium and the acinus of the serous gland. In turbinates, IL-17 also expressed in the cytoplasm of the plasm cell, the prickle-cell layer of the epithelium and the acinus of the serous gland. The expression of IL-17 between nasal polyps and turbinates differed significantly (t = 2.237, 2.176, 2.246, P < 0.05, respectively). Both IL-17 and IL-17R displayed specific bands in nasal polyps and turbinates, but the bands of IL-17 and IL-17R in nasal polyps were stronger than those in turbinates. CONCLUSIONS: IL-17 may have an important role in the occurrence of nasal polyps by specific combination with IL-17R and over-expression in nasal polyps.

Adult↗