RNA interference (RNAi) is a gene-silencing technology by which small double-stranded RNAs are used to target the degradation of RNA with complementary sequence. RNAi is found in a wide variety of organisms (Caenorhabditis elegans, insects, plants, microorganisms and animals). With RNAi, we have harnessed the gene function to be explored, revolutionized our ability to perform large-scale genetic screens, and even therapeutic potential.
Biology* ; Insects ; RNA ; RNA Interference ; RNA, Double-Stranded

No abstract available.
Acoustics*

No abstract available.

No abstract available.
Hyperplasia*

Bronchiectasis means a permanent abnormal dilatation of one or more large bronchi owing to destruction of theelastic and muscular components of the bronchial wall. Radiological study is the most importat and mandatory procedure. Especially bronchography is essential for the definitive diagnosis of bronchiectasis and for theprecise delineation of the type and extent of the disease. The radiological and clinical findings of 48 cases ofbronchiectasis diagnosed by bronchography and treated at Chosun University Hospital during the 5 years fromJanuary 1980 to Dec. 1984 were analyzed retrospectively. The results were as follows; 1. Among the 48 cases, 34cases(70.8%) were male and 14 cases(29.2%) were female. Peak incidence was in second decade. 2. Chronic cough,productive sputum and hemoptysis are main symptoms and others are chest pain, dyspnea and recurrent bouts ofpneumonia. The most common physical sign is persistent moist rales over the involved area in 23 cases(47.9%).Others are no sign in 17 cases(35.4%), wheezing in 11 cases(22.9%) and digit clubbing in 3 cases(6.3%). 3. Thepresumed causes were composed of not known in 30 cases(62.5%) and complications of measles in 7 cases(14.6%),pertusis in 5 cases(10.4%) and pneumonia in 4 cases(8.3%). Two cases were Kartagener's syndrom and unilateralhyperlucent lung. 4. Plain chest roentgenographic findings were abnormal in 42 cases(87.5%) but normal in 6cases(12.5%). The most common radiological findings was accentuation of lung markings in 36 cases(85.7%) theothers are include in order of frequency; pneumonic infiltration, linear radiolucencies, cystic radiolucencies,decreased affected lung volume air-fluid level and pleural thickening. 5. Bilateral bronchiectasis was demonstrated in 11 cases(22.9%) and the disease was much more often involved left lung than right. The mostcommonly involved lobe is left lower lobe, and the most common site of involvement was the posterior basal segmentof the lower lobe. The type of bronchiectasis is cylindrical in 22 cases(45.8%), varicose in 11 cases(22.9%),saccular in 9 cases(18.8%) and mixed type in 6 cases(12.5%)
Bronchi ; Bronchiectasis ; Bronchography ; Chest Pain ; Diagnosis ; Dilatation ; Dyspnea ; Female ; Hemoptysis ; Humans ; Incidence ; Lung ; Male ; Measles ; Pneumonia ; Respiratory Sounds ; Retrospective Studies ; Sputum ; Thorax

No abstract available.
Alleles* ; Base Sequence* ; Clone Cells* ; Cloning, Organism* ; HLA-DR Antigens

Myotonic dystrophy is the most common systemic disease causing myotonia. We report the case of respiratory failure in a patient with myotonic dystrophy after laparoscopic cholecystectomy. We carried out neurologic testing, electromyography and DNA testing in this patient and electromyography in the family of the patient. Through electromyography and DNA testing, this patient was diagnosed with myotonic dystrophy type I. Myotonic dystrophy is characterized by gradual decline of muscle tone and myotonia. It is important that this disease be excluded through preoperative history taking, physical examination and family history taking.
Cholecystectomy ; Cholecystectomy, Laparoscopic ; DNA ; Electromyography ; Humans ; Muscles ; Myotonia ; Myotonic Dystrophy ; Physical Examination ; Respiratory Insufficiency

No abstract available.
Child* ; Gastroenteritis* ; Humans* ; Infant*

No abstract available.
Animals ; Clone Cells* ; Cloning, Organism* ; DNA, Complementary* ; Leptin* ; Rats* ; Receptors, Leptin*

Acute appendicitis is a common disease, in general, but is rare in the elderly. This report is a clinical review of 148 patients over the age of 60 who, due to acute appendicitis, underwent appendectomies at the Department of General Surgery of Saint Columban Hospital from January 1993 to December 1995. The results are as follows: 1) The overall percentage of the patients over the age of 60 was about 16.4%. 2) The male to female ratio was 1:1.6. 3) The perforation rate was 33.1%. 4) The mean duration of symptoms were 2 days in non-perforated and 4.5 days in perforated appendicitis. 5) The chief complaints were pain (86.5%) and tenderness (88.5%) on right lower quadrant. 6) This disease occurred most frequently in spring and summer. 7) The highest incidence of leukocyte count was 10,000~15,000 per cubic mm of blood (50%). 8) The most frequent postoperative complication was wound infection as 14.2%. 9) sixty-seven cases (45.3%) were accompanied by concomitant disease, the most frequent being hypertention (14.9%). 10) The mean numbers of hospital days were 7.5 in non-perforated and 14 in perforated appendicitis.
Aged ; Appendectomy ; Appendicitis* ; Female ; Humans ; Incidence ; Leukocyte Count ; Male ; Postoperative Complications ; Saints ; Wound Infection