1.Fenofibrate decreases radiation sensitivity via peroxisome proliferator-activated receptor alpha-mediated superoxide dismutase induction in HeLa cells.
Xianguang LIU ; Seong Soon JANG ; Zhengzhe AN ; Hyejin SONG ; Won Dong KIM ; Jae Ran YU ; Woo Yoon PARK
Radiation Oncology Journal 2012;30(2):88-95
PURPOSE: The fibrates are ligands for peroxisome proliferator-activated receptor (PPAR) alpha and used clinically as hypolipidemic drugs. The fibrates are known to cause peroxisome proliferation, enhance superoxide dismutase (SOD) expression and catalase activity. The antioxidant actions of the fibrates may modify radiation sensitivity. Here, we investigated the change of the radiation sensitivity in two cervix cancer cell lines in combination with fenofibrate (FF). MATERIALS AND METHODS: Activity and protein expression of SOD were measured according to the concentration of FF. The mRNA expressions were measured by using real time reverse-transcription polymerase chain reaction. Combined cytotoxic effect of FF and radiation was measured by using clonogenic assay. RESULTS: In HeLa cells total SOD activity was increased with increasing FF doses up to 30 microM. In the other hand, the catalase activity was increased a little. As with activity the protein expression of SOD1 and SOD2 was increased with increasing doses of FF. The mRNAs of SOD1, SOD2, PPARalpha and PPARgamma were increased with increasing doses of FF. The reactive oxygen species (ROS) produced by radiation was decreased by preincubation with FF. The surviving fractions (SF) by combining FF and radiation was higher than those of radiation alone. In Me180 cells SOD and catalase activity were not increased with FF. Also, the mRNAs of SOD1, SOD2, and PPARalpha were not increased with FF. However, the mRNA of PPARgamma was increased with FF. CONCLUSION: FF can reduce radiation sensitivity by ROS scavenging via SOD induction in HeLa. SOD induction by FF is related with PPARalpha.
Catalase
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Cell Line
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Fenofibrate
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Fibric Acids
;
Hand
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HeLa Cells
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Humans
;
Hypolipidemic Agents
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Ligands
;
Peroxisomes
;
Polymerase Chain Reaction
;
PPAR alpha
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PPAR gamma
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Radiation Tolerance
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Reactive Oxygen Species
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RNA, Messenger
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Superoxide Dismutase
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Superoxides
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Uterine Cervical Neoplasms
2.Unusual Suicide with Chainsaw: An Autopsy Case Report
Yonghan JUNG ; Seonjung JANG ; Hyejin PARK ; Sookyoung LEE
Korean Journal of Legal Medicine 2020;44(1):41-44
In autopsy practice, we encounter case of suicide or murder using various methods or tools. Damage caused by tools such as a knife or hammer is commonly encountered, but a case of damage using a chainsaw is not commonly encountered. We present an autopsy case of a suicide due to neck injury using a chainsaw. A 56-year-old man was found dead with a neck injury and a chainsaw below him. Soft tissue of the neck, thyroid cartilage, trachea, carotid vessels, cervical vertebrae, and cervical spinal cord were found to be cleaved, and a cogwheel-shaped pattern was observed in the injured area.
3.Unusual Suicide with Chainsaw: An Autopsy Case Report
Yonghan JUNG ; Seonjung JANG ; Hyejin PARK ; Sookyoung LEE
Korean Journal of Legal Medicine 2020;44(1):41-44
In autopsy practice, we encounter case of suicide or murder using various methods or tools. Damage caused by tools such as a knife or hammer is commonly encountered, but a case of damage using a chainsaw is not commonly encountered. We present an autopsy case of a suicide due to neck injury using a chainsaw. A 56-year-old man was found dead with a neck injury and a chainsaw below him. Soft tissue of the neck, thyroid cartilage, trachea, carotid vessels, cervical vertebrae, and cervical spinal cord were found to be cleaved, and a cogwheel-shaped pattern was observed in the injured area.
4.Unusual Suicide with Chainsaw: An Autopsy Case Report
Yonghan JUNG ; Seonjung JANG ; Hyejin PARK ; Sookyoung LEE
Korean Journal of Legal Medicine 2020;44(1):41-44
In autopsy practice, we encounter case of suicide or murder using various methods or tools. Damage caused by tools such as a knife or hammer is commonly encountered, but a case of damage using a chainsaw is not commonly encountered. We present an autopsy case of a suicide due to neck injury using a chainsaw. A 56-year-old man was found dead with a neck injury and a chainsaw below him. Soft tissue of the neck, thyroid cartilage, trachea, carotid vessels, cervical vertebrae, and cervical spinal cord were found to be cleaved, and a cogwheel-shaped pattern was observed in the injured area.
5.Simplified Upper Gastrointestinal Endoscopic Simulator Made by Recycled Materials Could Be a Useful Tool of Education: Focus Group Interview
Junyoung YOON ; Kyung Min LEE ; Seok Young JANG ; Hyejin LEE
Korean Journal of Family Practice 2020;10(4):292-297
Background:
Upper gastrointestinal endoscopy is becoming a common technique used by primary care physicians, so appropriate education using adummy is beneficial for the trainees. However, because dummies are expensive, only a few hospitals have dummies. In this study, we investigatedwhether a simplified upper gastrointestinal endoscopic simulator created using recycled materials can be useful in endoscopic education.
Methods:
The simplified upper gastrointestinal endoscopic simulator was prepared using materials that were readily available around us. Focus groupinterviews were conducted with five family medicine trainees for 60 minutes using a semi-structured questionnaire. All conversations were recordedand transcribed after they provided informed consent. Data were analyzed using qualitative analysis methods.
Results:
Family medicine trainees believe that upper gastrointestinal endoscopic training is essential for primary care physicians and can be helpful intheir job after training. However, they were concerned about the possibility of endoscopic complications and difficulty in endoscopy operation. Allof them said that the simplified upper gastrointestinal endoscopic simulator helped reduce their fear and also helped them become familiar withanatomic positions. The simplified upper gastrointestinal endoscopic simulator also aroused their interest and motivated them to learn.
Conclusion
Overall, the simplified upper gastrointestinal endoscopy simulator seemed helpful for trainees of upper gastrointestinal endoscopy. Theuse of a simplified upper gastrointestinal endoscopy simulator could be considered in training hospitals that do not have enough financial resources.Further quantitative studies are needed to generate further evidence.
6.Fatal Complications of Dental Implant Surgery: An Autopsy Case Report
Yonghan JUNG ; Sangbum LIM ; Youngsan KO ; Seonjung JANG ; Hyejin PARK
Korean Journal of Legal Medicine 2020;44(2):92-95
Dental implants have become a popular and rapidly advancing technique to replace missing teeth. They have increasingly been used in the past few decades and have been associated with an increasing number of complications. There may be mechanical side effects, such as implant fracture while chewing, but side effects related to general procedures, such as bleeding and inflammation, may occur. Here, we report an autopsy case of death from pulmonary abscess and pneumonia due to septic emboli from gingival inflammation and sinusitis associated with dental implant surgery.
7.Bladder Cancer Medication Bacillus Calmette-Guérin-Cell Wall Skeleton Focusing on Alternatives and Developments to Limitations
Hyejin LEE ; Hyerim JANG ; Jeongyeon KIM ; Seoyeon MAENG ; Jihye KIM
Journal of Cancer Prevention 2025;30(1):1-6
Bacillus Calmette-Guérin (BCG) serves as an anticancer drug for bladder cancer by enhancing the innate immune response and facilitating the expression of beta-defensin-2/-3. BCG is significantly more effective than other treatment modalities; however, it has limitations due to the nonspecific secretion of immune proteins such as interleukin-2 (IL-2) and IFN-γ, necessitating frequent injections that result in toxicity. The newly developed BCG-cell wall skeleton (BCG-CWS) is intended to address the non-specificity and the requirement for repeated treatments associated with BCG. BCG-CWS stimulates antigen-presenting cells by secreting cytokines such as IL-12, using an adjuvant to enhance the immune response and synergize with it to provoke a potent immune reaction. Nevertheless, BCG-CWS encounters issues related to cellular uptake due to the substantial molecular weight of the drug.To meet this challenge, various strategies such as the introduction of R8 protein, the liposome evaporated via an emulsified lipid method, and nanoparticle formulation have been employed which can enhance targeted drug delivery, though issues related to particle size remain unresolved. This paper aims to discuss future perspectives by examining the mechanisms and challenges of BCG-CWS.
8.Bladder Cancer Medication Bacillus Calmette-Guérin-Cell Wall Skeleton Focusing on Alternatives and Developments to Limitations
Hyejin LEE ; Hyerim JANG ; Jeongyeon KIM ; Seoyeon MAENG ; Jihye KIM
Journal of Cancer Prevention 2025;30(1):1-6
Bacillus Calmette-Guérin (BCG) serves as an anticancer drug for bladder cancer by enhancing the innate immune response and facilitating the expression of beta-defensin-2/-3. BCG is significantly more effective than other treatment modalities; however, it has limitations due to the nonspecific secretion of immune proteins such as interleukin-2 (IL-2) and IFN-γ, necessitating frequent injections that result in toxicity. The newly developed BCG-cell wall skeleton (BCG-CWS) is intended to address the non-specificity and the requirement for repeated treatments associated with BCG. BCG-CWS stimulates antigen-presenting cells by secreting cytokines such as IL-12, using an adjuvant to enhance the immune response and synergize with it to provoke a potent immune reaction. Nevertheless, BCG-CWS encounters issues related to cellular uptake due to the substantial molecular weight of the drug.To meet this challenge, various strategies such as the introduction of R8 protein, the liposome evaporated via an emulsified lipid method, and nanoparticle formulation have been employed which can enhance targeted drug delivery, though issues related to particle size remain unresolved. This paper aims to discuss future perspectives by examining the mechanisms and challenges of BCG-CWS.
9.Bladder Cancer Medication Bacillus Calmette-Guérin-Cell Wall Skeleton Focusing on Alternatives and Developments to Limitations
Hyejin LEE ; Hyerim JANG ; Jeongyeon KIM ; Seoyeon MAENG ; Jihye KIM
Journal of Cancer Prevention 2025;30(1):1-6
Bacillus Calmette-Guérin (BCG) serves as an anticancer drug for bladder cancer by enhancing the innate immune response and facilitating the expression of beta-defensin-2/-3. BCG is significantly more effective than other treatment modalities; however, it has limitations due to the nonspecific secretion of immune proteins such as interleukin-2 (IL-2) and IFN-γ, necessitating frequent injections that result in toxicity. The newly developed BCG-cell wall skeleton (BCG-CWS) is intended to address the non-specificity and the requirement for repeated treatments associated with BCG. BCG-CWS stimulates antigen-presenting cells by secreting cytokines such as IL-12, using an adjuvant to enhance the immune response and synergize with it to provoke a potent immune reaction. Nevertheless, BCG-CWS encounters issues related to cellular uptake due to the substantial molecular weight of the drug.To meet this challenge, various strategies such as the introduction of R8 protein, the liposome evaporated via an emulsified lipid method, and nanoparticle formulation have been employed which can enhance targeted drug delivery, though issues related to particle size remain unresolved. This paper aims to discuss future perspectives by examining the mechanisms and challenges of BCG-CWS.
10.Myocardial Contrast Defect Associated with Thrombotic Coronary Occlusion: Pre-Autopsy Diagnosis of a Cardiac Death with Post-Mortem CT Angiography.
Heon LEE ; Hyejin PARK ; Jang Gyu CHA ; Sookyoung LEE ; Kyungmoo YANG
Korean Journal of Radiology 2015;16(5):1024-1028
We report the case of a female who died of suspected acute myocardial infarction. Post-mortem CT angiography (PMCTA) was performed with intravascular contrast infusion before the standard autopsy, and it successfully demonstrated the complete thrombotic occlusion of a coronary artery and also a corresponding perfusion defect on myocardium. We herein describe the PMCTA findings of a cardiac death with special emphasis on the potential benefits of this novel CT technique in forensic practice.
*Autopsy
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Coronary Occlusion/*diagnosis/etiology/radiography
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Coronary Vessels/pathology/radiography
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Female
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Humans
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Middle Aged
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Myocardial Infarction/etiology/pathology
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Myocardium
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Thrombosis/complications/*diagnosis
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Tomography, X-Ray Computed