Background: Interleukin-4 plays an important role in pathogenesis of asthma, especially in developing atopy by means of switching B lymphocytes to produce IgE. It has been shown that there is polymorphism in the Interleukin-4 promoter region, transversion of cytosine to thymine at-598 from translation initiation site of IL-4 gene. There has also been quite a few works to reveal the role of the polymorphism of IL-4 gene in patients with asthma. We performed this investigation to determine the role of the polymorphism in the severity of symptoms of patients with asthma. We also examined the frequency and the type of the polymorphism in asthmatics compared with non-asthmatics as well. Method: The subjects enrolled in this study were 49 asthmatics and 33 non-asthmatics. All the asthmatics were classified as mild and moderate to severe by the NHLBI/WHO Workshop. DNA from both asthmatics and non-asthmatics was extracted, then performed ARMS(Amplification Refractory Mutation System) as well as RFLP using BsmFl restriction enzyme in order to confirm the polymorphism of Il-4 gene. Results: There was no significant difference in the occurrence of polymorphism of the IL-4 promoter sequence between asthm and non-asthma groups(P=0.7). Among those with polymorphisms, the number of C/C type was slightly more than C/T type in both asthmatics and non-asthmatics, 26 vs 21 in asthmatics and 18 vs 15 in non-asthmatics, which was, however, insignificant statistically. No significant relationship between the severity of asthma and the polymorphism was found(P=0.7). Conclusion: There was no significant difference between the severity of asthma and the IL-4 promoter polymorphism(P=0.709). Interestingly, the frequency of the polymorphism in both asthmatics as well as non-asthmatics was found to be even higher than that occurred in Caucasians. However, no significant difference in the frequency of the polymorphism was found in both groups.
Background: As well as fiberoptic bronchoscopy, chest computerized tomographic scan can now differentiate the benign from malignant causes and the obstructive from non-obstructive causes of lung collapse. This study was designed to evaluate the usefulness of chest CT scan and fiberoptic bronchoscopy in the diagnosis of middle lobe syndrome. Method: We reviewed the clinical features, roentgenographic changes, pathologic findings and bronchoscopic findings in 16 patients with middle lobe syndrome who were admitted to Severance Hospital during period of January, 1987 through January, 1992. Results: The male to female ratio was 1:1. The most common symptoms were cough and sputums. Crackle was the most common physical finding. Underlying disease was lung cancer, pulmonary tuberculosis and endobronchial tuberculosis in 3 each other, benign stenosis in 2, lung abscess, broncholithiasis, bronchial chondroma, pneumonia and nonspecific inflammation in 1 each other. Conclusion: We conclude that the combination of chest computerized tomogram and fiberoptic bronchoscopy was most desirable for the diagnosis of middle lobe syndrome.
Background: Transcather arterial embolization has been established as an effective means to control hemoptysis, especially in patients with decreased pulmonary function such as postpneumonectomy patients and those with advanced chronic obstructive pulmonary disease. We evaluated the effect of arterial embolization and analysed the correlation of the clinical and angiographic characteristics and investigated the clinical course and outcome after arterial embolization in the patients with significant hemoptysis. Method: 58 patients with massive or recurrent hemoptysis underwent transcatheter arterial embolization for the treatment of hemoptysis from April 1992 to Sept. 1993. Results: Most common cause of hemoptysis was pulmonary tuberculosis(34 cases, 58.3%). Embolized vessels responsible for hemoptysis were 56 bronchial arteries and 32 nonbronchial systemic arteries. Initial most common angiographic findings were hypervascularity and shunt. Initial success rate of hemoptysis control revealed 81.1%. However, 15 of 58 patients(25.9%) showed recurrence of hemoptysis after transcatheter arterial embolization. The complications(18 cases, 31%) such as chest pain, fever, voiding difficulty, atelectasis, paralytic ileus and unwanted embolization were occured. Conclusion: Transcatheter arterial embolization is useful and relatively safe treatment modality for immediate bleeding control of patients with massive hemoptysis or inoperable cases. The further evaluation of the long term results according to the embolized material and underlying pulmonary disease will be required.
Hur, Gyu Young;Lee, Seung Hyeun;Jung, Jin Yong;Kim, Se Joong;Lee, Kyoung Ju;Lee, Eun Joo;Jung, Hye Cheol;Lee, Sung Yong;Lee, Sang Yeub;Kim, Je Hyeung;Shin, Chol;Shim, Jae Jeong;In, Kwang Ho;Kang, Kyung-Ho;Yoo, Se Hwa
Tuberculosis and Respiratory Diseases
/
v.59
no.1
/
pp.23-29
/
2005
Background : Chronic obstructive lung disease is characterized by smoke-related, gradually progressive, fixed airflow obstructions. However, some studies suggested that a reversible bronchial obstruction is common in chronic obstructive lung disease. Such reversibility persists despite the continued treatment with aerosolized bronchodilators and it appears to be related to the diminution in symptoms. The isolated volume response to a bronchodilator is defined as a remarkable increase in the FVC in response to the administration of a bronchodilator whereas the $FEV_1$ remains unchanged. This has been suggested in patients with severe emphysema. Therefore, the aim of this study was to determine the relationship between the response to a bronchodilator and the severity of an airflow obstruction in COPD patients using the GOLD classification. Methods : This study examined 124 patients with an airway obstruction. The patients underwent spirometry, and the severity of the airflow obstruction was classified by GOLD. The response groups were categorized by an improvement in the FVC or $FEV_1$ > 12%, and each group was analyzed. Results : Most subjects were men with a mean age of $65.9{\pm}8.5$ years. The mean smoking history was $41.26{\pm}20.1$ pack years. The isolated volume response group had relatively low $FEV_1$ and FVC values compared with the other groups. (p<0.001) Conclusion : In this study, an isolated volume response to a bronchodilator is a characteristic of a severe airway obstruction, which is observed in patient with a relatively poorer baseline lung function.
Chang, Won Chul;Kim, Byung Kook;Kim, Soon Jong;Yoo, Kwang Ha;Lee, Tae-Hun;Lee, Jung Yeon;Lee, Kye Young
Tuberculosis and Respiratory Diseases
/
v.59
no.6
/
pp.638-643
/
2005
Background : Several studies have shown considerable disagreement when using the $FEV_1$ and PEFR to assess the severity of an airflow obstruction. A differential classification of the severity of asthma would lead to serious differences in the evaluation and management of asthma. The aim of this study was to examine the relationship between the $FEV_1$ and PEFR in asthma patients with mild symptoms. Methods : In this study, the PEFR and $FEV_1$ were obtained from 92 adult asthma patients with mild symptoms attending an outpatient pulmonary clinic. The mean differences and the limits of agreement in the paired measurements of the $FEV_1$ and PEFR were calculated. Results : There was a considerable correlation between the $FEV_1$ and PEFR measurements when expressed as a % of the predicted values (r=0.686, p<0.01). The 95% limit of agreement (mean difference ${\pm}1.96SD$) between the $FEV_1$ % and PEFR % were acceptable(-27.4%~33.8%). In addition, the weighted ${\kappa}$(kappa) coefficient for the agreement between the $FEV_1$ % and PEFR % was 0.74 (95% CI, 0.63-0.81), indicating excellent agreement between the two measurements. Conclusion : The spirometer ($FEV_1$) and the Mini-Wright peak flow meter (PEFR) can be used interchangeably in adult asthma patients with mild symptom.
Background : It has been reported that nontuberculosis mycobacterium(NTM) isolates account for approximately 10% of patients with a positive Acid-Fast Bacilli(AFB) smear. Therefore, it is necessary to consider NTM pulmonary disease when such a positive test is encountered. The aim of this study was to evaluate the etiologies and clinical characteristics of patients with NTM pulmonary disease who had been treated at a national tuberculosis hospital. Methods : The NTM isolates were recovered from the sputum or bronchial washing specimens submitted to a clinical laboratory of National Masan TB Hospital from August 2002 to July 2003. All samples were identified using a polymerase chain reaction-restriction fragment length polymorphism analysis method, which amplifies the rpoB gene. The patients were diagnosed with NTM disease according to the American Thoracic Society diagnostic criteria. Results : One hundred NTM isolates were recovered from 57 patients. Of the 100 isolates, M. avium complex(MAC) was the most common species, which was found 55%(n=55) of patients, followed by M. abscessus(n=25), and M. fortuitum( n=9). 26(45.6%) patients had NTM disease. Twenty-six (45.6%) patients had NTM disease according to The American Thoracic Society classification. The main organisms involved in NTM disease were MAC(n=19, 73.1%) and M. abscessus(n=5, 19.2%). The pathogenic potential was 67.9% in M. intracellulare and 41.7% in M. abscessus. The predictive factors related to NTM disease were a positive sputum smear (OR 6.4, p=0.02) and the isolation of either MAC or M. abscessus(OR 6.9, p=0.007). Fifteen patients(57.7%) were cured. There were no significant factors associated with the treatment success. Conclusion : There was a relatively high proportion of NTM disease in NTM isolates and the common species were MAC and M. abscessus. The predictive factors for NTM disease were a positive sputum smear and the isolation of either MAC or M. abscessus.
Kim, Seung Joon;Lee, Sook Young;Kim, Myoung Sook;Lo, Dae Keun;Kwon, Soon Seog;Kim, Young Kyoon;Kim, Kwan Hyoung;Moon, Hwa Sik;Song, Jeong Sup;Park, Sung Hak
Tuberculosis and Respiratory Diseases
/
v.54
no.2
/
pp.191-198
/
2003
Background : The pathological features in asthmatic airway remodeling are diverse. The aim of this study was to examine the degree of airway vascularity in relation to the other remodeling parameters in asthmatics. Methods : Bronchial biopsies were done in 34 asthmatic patients, and 6 control subjects. The basement membrane thickness and the subepithelial thickness were measured in the hematoxylin-eosin stained tissue, and the degree of vascularity was measured using type IV collagen immunostaining. Results : 1) Compared to the control subjects, the asthmatics showed a significant increase in the basement membrane thickness ($6.92{\pm}2.01{\mu}m$ vs $9.67{\pm}2.84{\mu}m$, p<0.05) and the subepithelial thickness ($44.49{\pm}31.92{\mu}m$ vs $121.22{\pm}72.79{\mu}m$, p<0.05). 2) Compared to the control subjects, the asthmatics showed a significant increase in the vascular area per unit submucosal area ($4.51{\pm}2.13%$ vs $10.32{\pm}6.08%$, p<0.05). In addition, the number of vessels per unit submucosal area showed an increased tendency without statistical significance. 3) In the asthmatics, the number of vessels and the vascular area per unit submucosal area showed no correlation with the basement membrane thickness, the subepithelial thickness, the severity, the forced expiratory volume in 1 second($FEV_1$), and the methacholine provocative concentration 20($PC_{20}$). Conclusion : This study showed that vascularity was an important parameter in asthmatic airway remodeling but it was not related to the other remodeling parameters such as the basement membrane thickness and the subepithelial thickness. Each of these asthmatic remodeling parameters may have a different clinical significance. Therefore, further studies will be needed.
Background : Inhaled glucocorticoids are the medical treatment of choice in asthma patients. Fluticasone propionate is one of the most effective inhaled corticosteroids and has been reported to have minimal effect on the hypothalamic-pituitary-adrenal axis at the recommended dose. However, reports of long-term trials characterizing their systemic safety with chronic use are rare. This study was designed to evaluate the long-term safety of inhaled fluticasone propionate to the hypothalamic-pituitary-adrenal axis. Method : This study was conducted on 21 patients to evaluate the adrenal response to rapid ACTH stimulation test after 6 months of treatment with fluticasone propionate from $200\;{\mu}g$ to $750\;{\mu}g$ daily. The serum cortisol levels was measured to assess its effect on the hypothalamic-pituitary-adrenal axis just prior to the injection, at 30 minutes and 60 minutes after an intramuscular injection of synthetic ACTH. Result : The mean dose of inhaled fluticasone propionate was $355\;{\mu}g$ per day(SD=$174\;{\mu}g$, range=$200\;{\mu}g$ to $750\;{\mu}g$). The mean serum cortisol levels of the patients was $11.0\;{\mu}g/d{\ell}$(SD=$6.4\;{\mu}g/d{\ell}$) prior to the injection, $20.0\;{\mu}g/d{\ell}$ (SD=$7.7\;{\mu}g/d{\ell}$) after 30 minutes, and $23.0\;{\mu}g/d{\ell}$(SD=$6.3\;{\mu}g/d{\ell}$) after 60 minutes. Sixteen patients of the 21 patients had a normal response(> $18\;{\mu}g/d{\ell}$), and 5 out of the 21 patients had serum cortisol levels below the normal range after the rapid ACTH stimulation test. Conclusion: Adrenal suppression occurred in 5 out of 21 patients with 6 months treatment with inhaled fluticasone propionate.
Park, Jeong Woong;Lim, Young Hee;Kyung, Sun Young;An, Chang Hyeok;Lee, Sang Pyo;Jeong, Seong Hwan
Tuberculosis and Respiratory Diseases
/
v.59
no.3
/
pp.279-285
/
2005
Background : Ambient particles during Asian dust events are usually less than $10{\mu}m$ in size, and known to be associated with the adverse effects on the general population. There is little evidence linking Asian dust to adverse effects on the airways. In 2002, the authors found that particulate matter during Asian dust events had an effect on the symptoms and pulmonary function of patients with bronchial asthma. An aggravating factor might be that of a viral infection, but this remains unclear. Conversely, it has been speculated that African dust may carry the virus responsible for foot and mouth disease. Asian dust events are also likely to be responsible for transporting viruses, some of which are pathogenic, and common in many environments. Therefore, in this study, air samples were screened for the presence of viruses. Methods : Air samples were collected 20 times each during Asian dust events and under non-dust conditions, for at least 6 hours per sample, using a high volume air sampler (Sibata Model HV500F), with an airflow rate of 500L/min, between April and August 2003, and between April and August 2004. The samples were then screened for the presence of targeted viruses (Influenza A, B, Hog cholera virus, and Aphthovirus) using a polymerase chain reaction method. Results : One Asian dust event occurred between April and August 2003, and 3 between April and August 2004, with a 24 hour average PM10 level of $148.0{\mu}g/m^3$. The 24 hour average PM10 level was $57{\mu}g/m^3$. There was a significant difference in the PM10 concentration between dusty and clear days. No viruses (Influenza virus, Aphthovirus, and Hog cholera virus) were identified in the air samples obtained during the dusty days. Conclusions : Although no virus was detected in this study, further studies will be needed to identify suspected viruses carried during Asian dust events, employing more appropriate virus detection conditions.
Background: For the relief of the occlusion of major bronchi, laser therapy, radiation therapy or combined therapy is generally used. But the effect of radiation therapy is very slow and not consistent and laser therapy requires expensive equipments and technical expertise with occasional serious side effects. Direct ethanol injection has been widely used for the control of bleeding in gastrointestinal lesion, esophageal varices or renal cell carcinoma with good results. So we tried direct injection of ethanol into the tumor to relieve the obstruction of major bronchus in 11 patients. Method: All procedures were done under the fiberoptic bronchoscopy with continuous oxygen supplement and aliquoted 0.5-1.0 ml of absolute ethanol directly into the tumor through the endobronchial aspiration needle. The tumor was endoscopically removed with a biopsy forceps immediately after ethanol injection. The whole procedure was repeated 3-4 days interval until the lumen opens. Usually after 2-3 trials of ethanol injection, the lumen opened up. Results: The immediate effect of ethanol injection was whitening of the mucosa and prompt cessation of bleeding. The late effect was necrosis of the tumor. The final results of this procedure were improvement of symptoms and reexpnasion of the lung in all patients. $FEV_{1.0}$ and FVC were improved and $PaO_2$ was increased from $68.1{\pm}9.2$ mmHg to $83.9{\pm}8.1$ mmHg, $SaO_2$: from $94{\pm}8.5%$ to $96.6{\pm}1.1%$, and $AaDO_2$ was reduced from $26.5{\pm}8.5$ mmHg to $10.9{\pm}9.1$ mmHg. Conclusion: Direct ethanol injection into the tumor tissue is a rapid, cheap and relatively safe method of relieving the complete occlusion of major bronchus.
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