• The Korean Journal of Physiology and Pharmacology
• /
• 제20권4호
• /
• pp.367-378
• /
• 2016

Recently, it was reported that the role of mitochondria-reactive oxygen species (ROS) generating pathway in cisplatin-induced apoptosis is remarkable. Since a variety of molecules are involved in the pathway, a comprehensive approach to delineate the biological interactions of the molecules is required. However, quantitative modeling of the mitochondria-ROS generating pathway based on experiment and systemic analysis using the model have not been attempted so far. Thus, we conducted experiments to measure the concentration changes of critical molecules associated with mitochondrial apoptosis in both human mesothelioma H2052 and their ${\rho}^0$ cells lacking mitochondrial DNA (mtDNA). Based on the experiments, a novel mathematical model that can represent the essential dynamics of the mitochondrial apoptotic pathway induced by cisplatin was developed. The kinetic parameter values of the mathematical model were estimated from the experimental data. Then, we have investigated the dynamical properties of this model and predicted the apoptosis levels for various concentrations of cisplatin beyond the range of experiments. From parametric perturbation analysis, we further found that apoptosis will reach its saturation level beyond a certain critical cisplatin concentration.

• 한국인터넷방송통신학회논문지
• /
• 제20권6호
• /
• pp.137-144
• /
• 2020

코로나 19의 확산으로 온라인 수업에 대한 수요가 증가하고 있다. 이에 대학들은 다양한 형태의 온라인 강의를 도입하고 있으나 현장에서는 여러가지 문제들이 발생하고 있다. 학습자들은 강의와 시스템 품질에 대한 불만을 제기하고 있으며, 교수들은 온라인 수업 준비 및 진행에 대한 어려움을 호소하고 있다. 본 연구에서는 양방향 온라인 강의의 수업 상황을 분석하고, 수업 상황에서 교수자가 느끼는 불편함을 유형화 하였다. 연구자는 이러한 문제를 해결하기 위한 방안을 시스템과 행정적 요소로 나누어 제안하였다. 양방향 온라인 강의의 안정적 정착은 대학의 디지털 전환을 촉진할 것이다.

• Journal of Chest Surgery
• /
• 제56권2호
• /
• pp.67-74
• /
• 2023

Perioperative treatment with conventional cytotoxic chemotherapy for resectable non-small cell lung cancer (NSCLC) has proven clinical benefits in terms of achieving a higher overall survival (OS) rate. With its success in the palliative treatment of NSCLC, immune checkpoint blockade (ICB) has now become an essential component of treatment, even as neoadjuvant or adjuvant therapy in patients with operable NSCLC. Both pre- and post-surgery ICB applications have proven clinical efficacy in preventing disease recurrence. In addition, neoadjuvant ICB combined with cytotoxic chemotherapy has shown a significantly higher rate of pathologic regression of viable tumors compared with cytotoxic chemotherapy alone. To confirm this, an early signal of OS benefit has been shown in a selected population, with programmed death ligand 1 expression ≥50%. Furthermore, applying ICB both pre- and post-surgery enhances its clinical benefits, as is currently under evaluation in ongoing phase III trials. Simultaneously, as the number of available perioperative treatment options increases, the variables to be considered for making treatment decisions become more complex. Thus, the role of a multidisciplinary team-based treatment approach has not been fully emphasized. This review presents up-to-date pivotal data that lead to practical changes in managing resectable NSCLC. From the medical oncologist's perspective, it is time to dance with surgeons to decide on the sequence of systemic treatment, particularly the ICB-based approach, accompanying surgery for operable NSCLC.

• BMB Reports
• /
• 제56권11호
• /
• pp.594-599
• /
• 2023

A number of therapeutic drugs have been developed from functional chemicals found in plants. Knowledge of plants used for medicinal purposes has historically been transmitted by word of mouth or through literature. The aim of the present study is to provide a systemic platform for the development of lead compounds against breast cancer based on a traditional medical text. To verify our systematic approach, integrating processes consisted of text mining of traditional medical texts, 3-D virtual docking screening, and in vitro and in vivo experimental validations were demonstrated. Our text analysis system identified rutin as a specific phytochemical traditionally used for cancer treatment. 3-D virtual screening predicted that rutin could block EGFR signaling. Thus, we validated significant anti-cancer effects of rutin against breast cancer cells through blockade of EGFR signaling pathway in vitro. We also demonstrated in vivo anti-cancer effects of rutin using the breast cancer recurrence in vivo models. In summary, our innovative approach might be proper for discovering new phytochemical lead compounds designing for blockade of malignant neoplasm including breast cancer.

• Annals of Clinical Neurophysiology
• /
• 제12권1호
• /
• pp.7-10
• /
• 2010

Chronic low back pain (CLBP) is a distinct disease entity in that its clinical course and response to the treatment are quite different from acute low back pain (ALBP). CLBP is also closely related with systemic or preexisting psychosocial factors rather than focal or localized factors. Since there has been little consensus in practice regarding the proper management of CLBP, clinicians tend to approach and manage patients with CLBP in an empirical manner rather than an evidence-based one. In this article, I will review the difficulties of therapeutic choice in CLBP and provide superior aspects of medical treatment over invasive interventional treatments.

• Annals of Clinical Neurophysiology
• /
• 제14권1호
• /
• pp.12-19
• /
• 2012

Thermoregulatory sweat is principal mean for homeostasis of temperature. Sweat glands have eccrine gland, apocrine gland, and apoeccrine glands. Disorders of sweating are manifested by excess (hyperhidrosis) or deficit (hypohidrosis, anhidrosis) of sweat. Hyperhidrosis can be defined as excessive sweating beyond a level required to maintain normal body temperature. The sweating can be generalized or localized (axilla, palms, soles, palmar-plantar, perineal). Usually hypohidrosis or anhidrosis may be more serious than hyperhidrosis. Hyperhidrosis is usually benign, but interferes with one's daily activities. First step for diagnostic approach for sweating disorders might be dividing them into localized or generalized, and primary or secondary forms. Treatement for hyperhidrosis include topical agents, botulinum toxin A injections, systemic anticholinergics, and sympathectomy.

• 제어로봇시스템학회논문지
• /
• 제10권12호
• /
• pp.1181-1188
• /
• 2004

This paper reviews the main aspects of cardiovascular system dynamics with emphasis on modeling hemodynamic characteristics using a lumped parameter approach. Methodological and physiological aspects of the circulation dynamics are summarized with the help of existing mathematical models: The main characteristics of the hemodynamic elements, such as the heart and arterial and venous systems, are first described. Lumped models of micro-circulation and pulmonary circulation are introduced. We also discuss the feedback control of cardiovascular system. The control pathways that participate in feedback mechanisms (baroreceptors and cardiopulmonary receptors) are described to explain the interaction between hemodynamics and autonomic nerve control in the circulation. Based on a set-point model, the computational aspects of reflex control are explained. In final chapter we present the present research trend in this field and discuss the future studies of cardiovascular system modeling.

• Journal of Yeungnam Medical Science
• /
• 제33권2호
• /
• pp.138-141
• /
• 2016

Coronary stent dislodgement during percutaneous coronary intervention, which occurs when the stent is passed through tortuous and calcified lesions, is not a rare complication. Without proper treatment, such as fixing with another stent in the coronary artery or removing the undeployed stent from the coronary artery or systemic artery system, this complication can cause serious problems. We experienced the unusual situation of a dismounted and dislodged coronary stent, in which retrograde retrieval to the radial artery was impossible during transradial coronary intervention. We report on use of a rendezvous and snare technique at the brachial artery level via femoral puncture, which resulted in resolution without surgery.

• 시스템엔지니어링워크숍
• /
• 통권4호
• /
• pp.151-154
• /
• 2004

This paper presents the general system theory and its applications to the safety analysis method that is a recent trend over the traditional event-driven model. This new model is known as STAMP(Systems Theory Accident Modeling and Process)proposed by Nancy G. Leveson in MIT. The new model has benefits of systemic approaches concerning the system safety as a whole including the context it is in, its stimulants and outcomes, and its parts as well as the relationships among them in a holistic manner. The method consists of a hierarchical control structure, a process model, and the safety constraints governing the control. This paper demonstrates an example the contrasts the differences between the approaches of STAMP and the traditional safety models.

• Tuberculosis and Respiratory Diseases
• /
• 제69권3호
• /
• pp.153-162
• /
• 2010

Smoking is the most important risk factor of many pulmonary diseases, including chronic obstructive pulmonary disease and lung cancer, cardiovascular disorders and other malignancies. Therefore, smoking cessation is a practical way to prevent and treat smoking-related diseases. Also, the clinicians who care the patients with smoking-related disease should pay attention to it. This article reviews briefly recent publications focused on the influence of smoking cessation in some smoking-related diseases and strategies to improve smoking cessation such as pharmacotherapy or systemic behavioral approach programs. In addition, it reviews personalized therapy based on gene typing for smoking cessation.