1.The Effect of Antitoxin in Neonatal Tetanus.
Myung Dong AHN ; Tae Joo WHANG ; Chull SOHN
Journal of the Korean Pediatric Society 1985;28(1):25-32
No abstract available.
Tetanus*
2.A Case of Kawasaki Disease Associated with Acute Renal Failure and Necrotizing Myositis.
So Hyun AHN ; So Yun SHIM ; Sejung SOHN ; Seung Joo LEE ; Un Seop HAN
Journal of the Korean Pediatric Society 2003;46(2):207-209
Kawasaki disease is an acute febrile vasculitis affecting primarily infants and young children. In addition to the cardiovascular involvement, it may cause inflammatory changes in various organs and body systems : digestive, respiratory, urinary, nervous and musculoskeletal. A case is reported of atypical Kawasaki disease associated with acute renal failure and necrotizing myositis in the right gastrocnemius in a 10-year-old boy. In older children, uncommon age of onset and additional features less commonly associated with Kawasaki disease may contribute to a delayed diagnosis.
Acute Kidney Injury*
;
Age of Onset
;
Child
;
Delayed Diagnosis
;
Humans
;
Infant
;
Male
;
Mucocutaneous Lymph Node Syndrome*
;
Myositis*
;
Vasculitis
3.Phagocytosis and Acid Phosphatase Activity against Candida Albicans in Cultured Rabbit Keratocyte.
Joo Heon ROH ; Young Ho HAHN ; Seung Wan SOHN ; Do Whan AHN ; In Gun WON
Journal of the Korean Ophthalmological Society 2000;41(2):339-348
It has been reported that keratocytes endocytose foreign particles both in vitro and in vivo, suggesting the active participation of keratocytes in corneal wound healing and host defense mechanism. This study was conducted to investigate the phagocytosis of keratocytes against Candida albicans[C.albicans]and the intracellular response after phagocytosis. C.albicans were fixed with glutaraldehyde and then coated with fibronectin. After exposing these C.albicans to the cultured rabbit keratocytes, the phagocytosis of keratocytes against C.albicans was evaluated by light microscope[LM]and transmission electron microscope[TEM], while the intracellular response was evaluated by changes of acid phosphatase activity. Also the study about latex beads was performed at the same time to know even if keratocytes can phagocytose foreign particles, regardless of wheather or not the particles are biodegradable. After Wright staining, phagocytosed latex beads and C.albicans were observed on LM and these were recognized to be surrounded by limiting membranes inside the cytoplasm of keratocytes on TEM. The phagocytic rates of fibronectin-coated were increased to 1.5 times , as compared with that of non-coated group. Acid phosphatase activities were higher in C.albicans-exposed groups than in control[keratocytes cultured without C.albicans or latex beads]during the culture period of 24 hours and they also increased according to culture duration and reached to the plateau after 12 hours. In comparison with non-coated group, fibronectin-coated groups showed a increasing tendency of acid phosphatase activity. These results suggest that keratocytes can phagocytose not only foreign particles but also C.albicans and that fibronectin may act as effective opsonin on phagocytosis, and that keratocytes phagocytosing C.albicans increase acid phosphatase activity to digest engulfed C.albicans when corneal stroma was wounded or inflammed.
Acid Phosphatase*
;
Candida albicans*
;
Candida*
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Corneal Stroma
;
Cytoplasm
;
Fibronectins
;
Glutaral
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Latex
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Membranes
;
Microspheres
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Phagocytosis*
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Wound Healing
;
Wounds and Injuries
4.Culture of Chondrocytes on Scaffolds with Different Pore Network of PLGA and PLLA.
Jong Won RHIE ; Tae Joo AHN ; Jae Gu PARK ; Joo Young SOHN ; Hae Suk CHO ; Poong LIM
Journal of the Korean Society of Plastic and Reconstructive Surgeons 2003;30(2):237-244
This study was performed to investigate the in vitro proliferation and migration of rabbit auricular chondrocytes into the various sized pore of PLLA and PLGA scaffolds. The chondrocytes were harvested, expanded, and seeded onto PLGA(50 : 50, 75 : 25, 85 : 15) and PLLA scaffold having either small(50 - 100 micrometer) or large(300 - 350 micrometer) pores. On the 4th and 8th week after culture, histologic observation and quantitative DNA assay were done. We noted that the largest amount of DNA was found in the 85 : 15 PLGA sponges than others, and in the 4th and 8th week, some amount of DNA was detected in the lower portion of 85 : 15 PLGA sponge only, and DNA amounts were increased during the culture period in the 85 : 15 PLGA, significantly. We also found that the numbers of cells were low in middle portion of scaffolds, and in large pore-sized group of 85 : 15 PLGA, there were many cells in the lower portion of the scaffolds more than that of small pore group. In conclusion, the pore size of the scaffold for chondrocyte culture is important for cell migration and proliferation, and PLGA, especially 85 : 15 PLGA with 300- 350 micrometer sized pore is the more suitable biomatrix for proliferation and migration of the chondrocytes.
Cell Movement
;
Chondrocytes*
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DNA
;
Porifera
5.A Case of Chronic Granulomatous Disease (Autopsy case).
Kil Sun KONG ; Sung Sook CHO ; Don Hee AHN ; Keun Chan SOHN ; Joo Kyun PARK ; Hyo Sook PARK ; Je Keun JI
Journal of the Korean Pediatric Society 1979;22(2):148-157
A 3 year and 3 months old boy with recurrent infections since his age of 5 months was presented with clinical data and autopsy findings. He was the 4th product of healthy parents. His elder brother died of recurrent perianal abscess and sepsis at his age of 3 years. His 2nd elder sister died on the 14th day of life probably from the complication of BCG vaccination. Beginnig with perianal abscesses at his age of 5 months, he has been continuously suffering from recurrent infections such as arthritis, ostomyelitis, pneumonia, epididymitis, subcutaneous abscesses and perianal abscesses. In spite of meticulous supportive and aggressive antibiotic therapy persistent positive cultures for staph. Aureus, klebsiella, E. Coli, Enterococcus and coliform bacilli from different sited were noted. Erythrocyte sedimentation rate of 25 to 40 were constant. White cell count varied frem 15500 to 33400 with polymorphonucleocytes predominance. NBT test showed persistent low scoring of 2% throught the course. He finally died of pneumonia and empyema. At postmortem examination, multiple abscesses and grnulomas of right lung and multipe granulomas in the liver, spleen, lymph node, bone, marrow, adrenal gland, kidney and intestinal wass were noted. At microscopic examination histiocytic granulomas with lipid containing histiocyte infiltrations were noted in every organs described including brain.
Abscess
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Adrenal Glands
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Arthritis
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Autopsy
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Blood Sedimentation
;
Bone Marrow
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Brain
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Cell Count
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Empyema
;
Enterobacteriaceae
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Enterococcus
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Epididymitis
;
Granuloma
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Granulomatous Disease, Chronic*
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Histiocytes
;
Humans
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Infant
;
Kidney
;
Klebsiella
;
Liver
;
Lung
;
Lymph Nodes
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Male
;
Mycobacterium bovis
;
Parents
;
Pneumonia
;
Sepsis
;
Siblings
;
Spleen
;
Vaccination
6.Increases in Doxorubicin Sensitivity and Radioiodide Uptake by Transfecting shMDR and Sodium/Iodide Symporter Gene in Cancer Cells Expressing Multidrug Resistance.
Sohn Joo AHN ; Yong Jin LEE ; You La LEE ; Chang Ik CHOI ; Sang Woo LEE ; Jeongsoo YOO ; Byeong Cheol AHN ; In Kyu LEE ; Jaetae LEE
Nuclear Medicine and Molecular Imaging 2007;41(3):209-217
PURPOSE: Multidrug resistance (MDR) of the cancer cells related to mdr1 gene expression can be effectively treated by selective short hairpin RNA for mdr1 gene (shMDR). Sodium/iodide symporter (NIS) gene is well known to have both reporter and therapeutic gene characteristics. We have co-transfected both shMDR and NIS gene into colon cancer cells (HCT15 cell) expressing MDR and Tc-99m sestamibi and I-125 uptake were measured. In addition, cytotoxic effects of doxorubicin and I-131 therapy were also assessed after transfection. MATERIAL AND METHODS: At first, shMDR was transfected with liposome reagent into human embryonic kidney cells (HEK293) and HCT cells. shMDR transfection was confirmed by RT-PCR and western blot analysis. Adenovirus expressing NIS (Ad-NIS) gene and shMDR (Ad-shMDR) were co-transfected with Ad-NIS into HCT15 cells. Forty-eight hours after infection, inhibition of P-gycoprotein (Pgp) function by shMDR was analyzed by a change of Tc-99m sestamibi uptake and doxorubicin cytotoxicity, and functional activity of induced NIS gene expression was assessed with I-125 uptake assay. RESULTS: In HEK293 cells transfected with shMDR, mdr1 mRNA and Pgp protein expressions were down regulated. HCT15 cells infected with 20 MOI of Ad-NIS was higher NIS protein expression than control cells. After transfection of 300 MOI of Ad-shMDR either with or without 10 MOI of Ad-NIS, uptake of Tc-99m sestamibi increased up to 1.5-fold than control cells. HCT15 cells infected with 10 MOI of Ad-NIS showed approximately 25-fold higher I-125 uptake than control cells. Cotransfection of Ad-shMDR and Ad-NIS resulted in enhanced cytotoxic by doxorubicin in HCT15 cells. I-131 treatment on HCT15 cells infected with 20 MOI of Ad-NIS revealed increased cytotoxic effect. CONCLUSION: Suppression of mdr1 gene expression, retention of Tc-99m sestamibi, enhanced doxorubicin cytotoxicity and increases in I-125 uptake were achieved in MDR expressing cancer cell by co-transfection of shMDR and NIS gene. Dual therapy with doxorubicin and radioiodine after cotransfection shMDR and NIS gene can be used to overcome MDR.
Adenoviridae
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Blotting, Western
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Colonic Neoplasms
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Doxorubicin*
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Drug Resistance, Multiple*
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Gene Expression
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HEK293 Cells
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Humans
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Ion Transport*
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Kidney
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Liposomes
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RNA, Messenger
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RNA, Small Interfering
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Transfection
7.Phase II Study of Gemcitabine and Vinorelbine as Second-Line Chemotherapy in Non-Small Cell Lung Cancer.
Yoon Jae KIM ; Joo Hyuk SOHN ; Chul KIM ; Yong Tai KIM ; Hai Jin KIM ; Joong Bae AHN ; Se Kyu KIM ; Joon CHANG ; Nae Choon YOO ; Joo Hang KIM ; Jae Yong CHO
Cancer Research and Treatment 2003;35(4):294-298
PURPOSE: With the increased use of chemotherapy for non small cell lung cancer (NSCLC), a growing group of patients can now be considered for second-line chemotherapy. However, guidelines for the second line treatment remain to be developed. The objective of this study was to evaluate the efficacy and safety of the gemcitabine and vinorelbine combination therapy in patients with advanced NSCLC, pretreated with taxane and platinum based regimens. Gemcitabine has already demonstrated activity in this patient group, with the combination therapy having been reported to be well tolerated in previous phase I/II studies. MATERIALS AND METHODS: Forty two patients with advanced NSCLC (stages III/IV), having received prior taxane and platinum based chemotherapy, with an ECOG performance status (PS) 0~2, and unimpaired hematopoietic and organ function, were treated with vinorelbine, 20 mg/m2, followed by gemcitabine, 1, 000 mg/m2, both administered on days 1, 8 and 15, every 4 weeks. RESULTS: Out of the 42 patients enrolled, 41 were evaluable for their response, and all 42 for their toxicity. The patient's characteristics were as follows; median age=60 years (42~73), median PS=1 (range 0~2), a gender ratio 31: 11 males/females, with stages IIIA, IIIB and IV in 3, 14 and 25 cases. The objective responses included a partial response (PR) 8/41 (19.5%), a stable disease 15/41 (36.6%) and a progressive disease 18/41 (43.9%). The median time-to progression (TTP) and survival were 4 months, ranging from 2 to 14 months, and 8 months, ranging from 2 to 17+ months, respectively. Grade 3 neutropenia was seen in 19% of the patient, and there was no grade 4 neutropenia or episodes of febrile neutropenia. No grade 4 thrombocytopenia or other grade 3/4 non-hematological toxicities were observed. CONCLUSION: The combination of gemcitabine/vinorelbine is active and well tolerated in patients with advanced NSCLC having failed prior taxane/platinum therapy.
Carcinoma, Non-Small-Cell Lung*
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Drug Therapy*
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Febrile Neutropenia
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Humans
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Neutropenia
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Platinum
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Small Cell Lung Carcinoma
;
Thrombocytopenia
8.Pharmacists' Perceptions of Barriers to Providing Appropriate Pharmaceutical Services in Community Pharmacies.
Hyun Soon SOHN ; Seong Ok KIM ; Kyung Mi JOO ; Hyekyung PARK ; Euna HAN ; Hyung Tae AHN ; Sang Eun CHOI
Korean Journal of Clinical Pharmacy 2015;25(2):94-101
BACKGROUND: In order to achieve the goals of community pharmacy practice, its legal, labour-related, and economic barriers need to be identified. This study examined pharmacists' perceptions of constraints on providing optimal pharmacy services in order to identify underlying factors and analyse the associations between barriers and pharmaceutical services in community pharmacies. METHODS: A survey targeting pharmacy owners was conducted from May to June 2012 using a structured questionnaire including nine pharmaceutical service items. According to the service provision level, we classified pharmacists as inactive (fewer than 5 items among the listed 9 service items) and active providers (5 or more items). Principal component analysis was used to group significant factors for barriers into four thematic components. Associations between the participants' demographics and pharmacy characteristics and the services provided were explored by logistic regression analyses. RESULTS: Participants were 402 pharmacists. Over 60% provided disease management services for hypertension, diabetes, and hyperlipidaemia. Variables that affected pharmaceutical services included the lack of separate areas for patient counselling (OR: 2.12, 95% CI: 1.18-3.80), and clinical knowledge and information-related barriers (OR: 0.59, 95% CI: 0.36-0.97). CONCLUSION: Strategies for improving clinical knowledge and providing expeditious information are necessary in order to improve community pharmacy services.
Community Pharmacy Services
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Demography
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Disease Management
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Humans
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Hypertension
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Logistic Models
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Pharmaceutical Services*
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Pharmacies*
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Pharmacists
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Pharmacy
;
Principal Component Analysis
9.Comparison of the Effectiveness of Interventional Endoscopy in Bleeding Peptic Ulcer Disease according to the Timing of Endoscopy.
Hyun Seok CHO ; Dong Soo HAN ; Sang Bong AHN ; Tae Jun BYUN ; Tae Yeob KIM ; Chang Soo EUN ; Yong Cheol JEON ; Joo Hyun SOHN
Gut and Liver 2009;3(4):266-270
BACKGROUND/AIMS: The optimal timing for interventional endoscopy in bleeding peptic ulcer disease is controversial. This study compared the outcomes between early endoscopy and delayed endoscopy in patients with bleeding peptic ulcer disease. METHODS: We conducted a prospective analysis of data from 90 patients with bleeding peptic ulcer disease who visited the emergency room between May 2006 and September 2007. Patients were categorized into two groups: the early-endoscopy group (admitted during the daytime or at night with prompt endoscopic management) and the delayed-endoscopy group (admitted at night or during weekends, with endoscopic management delayed until the next day). We compared the clinical outcomes of endoscopy between the two groups. RESULTS: There were 49 patients in the early-endoscopy group and 41 patients in the delayed-endoscopy group. Patient demographics, clinical characteristics, bleeding control modality, and Rockall score did not differ between the two groups. There were also no significant differences between the early- and delayed-endoscopy groups in the re-bleeding rate (3/49 vs 5/41, p=0.313), the duration of hospital stay (10.7 vs 9.3 days, p=0.437), and the total amount of blood transfused (3.4 vs 2.7 units, p=0.240). CONCLUSIONS: The effectiveness of interventional endoscopy for patients with bleeding peptic ulcer disease is not significantly affected by the timing of endoscopy.
Demography
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Emergencies
;
Endoscopy
;
Hemorrhage
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Humans
;
Length of Stay
;
Peptic Ulcer
;
Prospective Studies
10.The Colonoscopic Withdrawal Time is Correlated with the Rate of Detecting Polyps When Performing Colonoscopy.
Sang Bong AHN ; Dong Soo HAN ; Sun Min KIM ; Hyun Seok CHO ; Tae Jun BYUN ; Tae Yeob KIM ; Chang Soo EUN ; Yong Cheol JEON ; Joo Hyun SOHN
Korean Journal of Gastrointestinal Endoscopy 2009;38(2):75-79
BACKGROUND/AIMS: The colonoscopic withdrawal time has been proposed as a quality indicator for colonoscopy, and this is based on the recent evidence that the Colon withdrawal time is associated with adenoma detection rate. In this study, we examined the difference of the polyp detection rates between practicing endoscopists, and we analysed certain factors that might lead to such differences, and particularly the colonoscopic withdrawal time. METHODS: We retrospectively evaluated the colonoscopic procedures that were performed by 7 second-year GI fellows at Hanyang University Guri Hospital. A total of 1,515 colonoscopies were assessed for the polyp detection rate, the insertion time, the withdrawal time, bowel preparation, the size of the detected polyps and the location of polyps. RESULTS: The median withdrawal time for the case with no polyps removed was 3.6 to 7.1 minutes. There was a strong positive correlation between the colonoscopic withdrawal times and the polyp detection rates (p<0.001). Furthermore, a longer withdrawal time resulted in discovering a higher percentage of small polyps. On comparing groups, the group of colonoscopists with a withdrawal time longer than 6 minutes had a higher rate of detecting polyps (30.7% vs 18.4%, p<0.001). CONCLUSIONS: There is wide range of polyp detection rates among practicing colonoscopists and there is strong positive correlation between the colonoscopic withdrawal times and the rate of detecting polyps. A long enough withdrawal time, perhaps 7 minutes, is needed to raise the rate of detecting polyps during colonoscopy.
Adenoma
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Colon
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Colonoscopy
;
Polyps
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Quality Indicators, Health Care
;
Retrospective Studies