1.Clinical and Epidemiologic Studies on Childhood Asthma.
Youn Mo AHN ; Sun Ho LEE ; Ha Baik LEE ; Hahng LEE
Journal of the Korean Pediatric Society 1990;33(5):632-641
No abstract available.
Asthma*
;
Epidemiologic Studies*
2.A Clinical Study of Hospitalized Neonates with Fever.
Youn Mo AHN ; Chang Ryul KIM ; Woo Gill LEE ; Soo Jee MOON
Journal of the Korean Pediatric Society 1988;31(11):1437-1444
No abstract available.
Fever*
;
Humans
;
Infant, Newborn*
3.An Agiographic Study on Developemental and Spatial Relationship of Patent Ductus Arteriosus (PDA) and Aortic Arch in Right Ventricular Outflow Tract (RVOT) Obstruction.
DO Hyun KIM ; Youn Mo AHN ; Ha Balk LEE ; Kyoo Hwan RHEE ; Hahng LEE ; Seok Chol JEON
Journal of the Korean Pediatric Society 1988;31(9):1139-1145
No abstract available.
Aorta, Thoracic*
;
Ductus Arteriosus, Patent*
6.Identification of a Calcium-activated Potassium Channel Gene Expressed in Rat Cardiac Myocytes.
In Seung PARK ; Hyun Kyu JEON ; Nam Su KIM ; Youn Mo AHN ; Chul Seung PARK ; Ha Baik LEE
Journal of the Korean Pediatric Society 2000;43(7):905-912
PURPOSE: Calcium-activated potassium channels(KCa) may be involved in the transient outward current of the first phase of cardiac action potential. But it is still not clear whether cardiac myocytes express any Kca. We try to identify here the types of Kc, expressed in rat caridac myocytes. METHODS: We isolated total heart RNA from 50 rats(Spague-Dawley) and performed reverse transcription-polymerase chain reaction(RT-PCR) using specifically designed synthetic oligonucleotide primer sets. From the pure culture of cardiac myocyte, Kc, gene expression was detected by Southern blot analysis. RESULTS: RT-PCR revealed expressions of BKca(large-conductance Kca, rSlo) and S&,(small-conductance Kca, rSK1). We prepared cardiac myocytes pure culture(>9596 pure myocyte) using pure culture technique. RT-PCR and Southern blot analysis of rat cardiac myocyte showed only rSK1-specific band, but no rSlo-specific was detected. CONCLUSION: The expressions of more than one type of Kca are detected from rat heart. A sub-type of SKcrSK1, was expressed in cardiac myocyte, while the main subunit of BKca(rSlo) was found in cells other than myocytes, most likely in the smooth muscle of cardiac blood vessels.
Action Potentials
;
Animals
;
Blood Vessels
;
Blotting, Southern
;
Culture Techniques
;
Gene Expression
;
Heart
;
Muscle Cells
;
Muscle, Smooth
;
Myocytes, Cardiac*
;
Potassium
;
Potassium Channels, Calcium-Activated*
;
Rats*
;
RNA
7.Pancreatic High-Grade Neuroendocrine Neoplasms in the Korean Population: A Multicenter Study
Haeryoung KIM ; Soyeon AN ; Kyoungbun LEE ; Sangjeong AHN ; Do Youn PARK ; Jo-Heon KIM ; Dong-Wook KANG ; Min-Ju KIM ; Mee Soo CHANG ; Eun Sun JUNG ; Joon Mee KIM ; Yoon Jung CHOI ; So-Young JIN ; Hee Kyung CHANG ; Mee-Yon CHO ; Yun Kyung KANG ; Myunghee KANG ; Soomin AHN ; Youn Wha KIM ; Seung-Mo HONG ;
Cancer Research and Treatment 2020;52(1):263-276
Purpose:
The most recent 2017 World Health Organization (WHO) classification of pancreatic neuroendocrine neoplasms (PanNENs) has refined the three-tiered 2010 scheme by separating grade 3 pancreatic neuroendocrine tumors (G3 PanNETs) from poorly differentiated pancreatic neuroendocrine carcinomas (PanNECs). However, differentiating between G3 Pan- NETs and PanNECs is difficult in clinical practice.
Materials and Methods:
Eighty-two surgically resected PanNENs were collected from 16 institutions and reclassified according to the 2017 WHO classification based on the histological features and proliferation index (mitosis and Ki-67). Immunohistochemical stains for ATRX, DAXX, retinoblastoma, p53, Smad4, p16, and MUC1 were performed for 15 high-grade PanNENs.
Results:
Re-classification resulted in 20 G1 PanNETs (24%), 47 G2 PanNETs (57%), eight G3 well-differentiated PanNETs (10%), and seven poorly differentiated PanNECs (9%). PanNECs showed more frequent diffuse nuclear atypia, solid growth patterns and apoptosis, less frequent organoid growth and regular vascular patterns, and absence of low-grade PanNET components than PanNETs. The Ki-67 index was significantly higher in PanNEC (58.2%± 15.1%) compared to G3 PanNET (22.6%±6.1%, p < 0.001). Abnormal expression of any two of p53, p16, MUC1, and Smad4 could discriminate PanNECs from G3 PanNETs with 100% specificity and 87.5% sensitivity.
Conclusion
Histological features supporting the diagnosis of PanNECs over G3 PanNETs were the absence of a low-grade PanNET component in the tumor, the presence of diffuse marked nuclear atypia, solid growth pattern, frequent apoptosis and markedly increased proliferative activity with homogeneous Ki-67 labeling. Immunohistochemical stains for p53, p16, MUC1, and Smad4 may be helpful in distinguishing PanNECs from G3 PanNETs in histologically ambiguous cases, especially in diagnostic practice when only small biopsied tissues are available.
8.A Case of Achieving Complete Remission with Combination of Sorafenib and Tegafur in Patients with Hepatocellular Carcinoma with Progression of Disease after Sorafenib Therapy.
Sang Youn HWANG ; Seon Mi LEE ; Jung Woo IM ; Ki Jeong JEON ; Sang Bu AHN ; Jin Young PARK ; Cheol Won CHOI ; Kwang Mo YANG
Journal of Liver Cancer 2017;17(1):88-93
Sorafenib is the only approved targeted agent as the first line systemic therapy for treatment of advanced hepatocellular carcinoma (HCC). However, the improvement of survival duration under 3 months is far from clinical satisfactory and most patients experience disease progression within 6 months after sorafenib therapy. Unfortunately, second line systemic therapy after treatment failure of sorafenib was not established and there were no clear guidelines for salvage treatment modalities. Recently, studies suggests that combination of sorafenib and single cytotoxic agent can be relatively effective and safe strategy that achieves promising rates of local and systemic control in advanced HCC patients. Based on above suggestions, we herein offer our experience of a case achieved complete remission by combination therapy of sorafenib and tegafur in the patient with progressed disease after sorafenib therapy.
Carcinoma, Hepatocellular*
;
Disease Progression
;
Humans
;
Salvage Therapy
;
Tegafur*
;
Treatment Failure
9.Idiopathic Synovial Osteochondromatosis of the Hip: Radiographic and MR Appearances in 15 Patients.
Sung Hyun KIM ; Suk Ju HONG ; Ji Seon PARK ; Jae Min CHO ; Eung Yeop KIM ; Joong Mo AHN ; Youn Soo PARK
Korean Journal of Radiology 2002;3(4):254-259
OBJECTIVE: To evaluate the radiographic and MR appearance of idiopathic synovial osteochondromatosis of the hip. MATERIALS AND METHODS: Radiographs and MR images of 15 patients with idiopathic synovial osteochondromatosis of the hip were assessed. The former were analysed in terms of the presence of 1) juxta-articular calcified and/ or ossified bodies, 2) osteophytes, 3) bone erosion, 4) juxta-articular osteopenia, and 5) joint space narrowing, while for the latter, analysis focused on 1) the configuration of intra-articular bodies, 2) bone erosion, 3) synovial thickening, 4) conglomeration of intra-articular bodies, and 5) extra-articular extension. RESULTS: At hip radiography, juxta-articular calcified and/ or ossified bodies were seen in 12 of the 15 patients (80%), bone erosion in eight (53%), osteophytes in seven (47%), juxta-articular osteopenia in five (33%) and joint space narrowing in five (33%). In eight patients (53%), MR imaging depicted intra-articular bodies of focal low signal intensity at all pulse sequences, and areas of isointensity at T1WI and hyperintensity at T2WI. In three (20%), intra-articular bodies of focal low signal intensity and areas of hyperintensity at all pulse sequences were observed, with areas of iso-intensity at T1WI and hyperintensity at T2WI, while in four (27%), intra-articular bodies of only focal low signal intensity at all pulse sequences were apparent. Synovial thickening was present in 13 patients (87%), bone erosion in 11 (73%), conglomeration of the intra-articular bodies in 11 (73%), and an extra-articular herniation sac in six (40%). CONCLUSION: The most common radiographic finding of synovial osteochondromatosis of the hip was the presence of juxta-articular calcified and/ or ossified bodies. MR imaging depicted intra-articular bodies of focal low signal intensity at all pulse sequences, with areas of iso-intensity at T1WI and hyperintensity at T2WI. In addition, the presence of an extra-articular herniation sac was not uncommon.
Adult
;
Chondromatosis, Synovial/*diagnosis
;
Female
;
*Hip Joint/pathology/radiography
;
Human
;
Magnetic Resonance Imaging
;
Male
10.Blood Lead, Manganese, Aluminium and Silicon Concentrations in Korean Adults.
Jung Man KIM ; Jung Mo AHN ; Won Sul KIM ; Jung Il KIM ; Hai Rim SHIN ; Kap Yeol JUNG ; Joon Youn KIM
Korean Journal of Preventive Medicine 2000;33(2):157-164
OBJECTIVES: This study was performed to determine the reference values of blood lead, manganese, aluminium, and silicon in healthy adults. METHODS: The subjects were 132 (67 male and 65 female), and classified to three age groups (< or =39, 40~49, and 50< or =). Blood lead, manganese and aluminium were analyzed by atomic absorption spectrophotometer, and blood silicon was analyzed by direct current plasma optical emission spectrometer. RESULTS: Blood lead levels(geometric mean, S.D) were (3.49, 1.70) microgram/dL in male and (3.04, 1.65) microgram/dL in female, but the difference is not significant, and there was no significant difference between age groups. Mean blood manganese level was 0.99+/-0.41 microgram/dL, and there was no significant difference between sex or age groups. Mean blood aluminium level was 0.59+/-0.35 microgram/dL, and there was no significant difference between sex or age groups. Mean blood silicon level was 54.41+/-27.64 microgram/dL in male and 43.34+/- 23.51 microgram/dL in female, and the level in male was significantly higher than that in female (p<0.05). There was significant difference between age groups, and the oldest showed the highest level in male (p<0.05), but no significant difference between age groups in female. CONCLUSIONS: Authors hope that this study would provide basic data for determining reference values and evaluating health effects.
Absorption
;
Adult*
;
Female
;
Hope
;
Humans
;
Male
;
Manganese*
;
Plasma
;
Reference Values
;
Silicon*