• 대한물리의학회지
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• 제8권1호
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• pp.71-78
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• 2013

PURPOSE: The purpose of this study was to investigate the effects of treadmill exercise on blood components and antioxidant system in hyperlipidemic rats. METHODS: Three weeks old male rats were randomly assigned into General diet(GD, n=10), High fat Diet(HD, n=10), and High fat diet+Treadmill exercise(HDT, n=10) groups. Treadmill exercise consisted of the treadmill running 5 times per week during 6 weeks(30 min/time for first 3 weeks and 60 min/time the other 3 weeks). RESULTS: The levels of triglyceride and total cholesterol were increased in HD group compared with GD group, and recovered to level of GD group by treadmill exercise(p<.05). Plasma glucose and insulin concentrations were increased in HD group compared with GD group, and recovered to level of GD group by treadmill exercise(p<.05). Glutathione(GSH) and glutathione reductase(GRD) concentrations were decreased in HD group compared with GD group, and these decreases returned to the level of GD group by treadmill exercise(p<.05). Xanthine oxidase(XO) and malondialdehyyde (MDA) concentrations were increased in HD group compared with GD group, and these increases retuned to the level of GD group by treadmill exercise(p<.05). CONCLUSION: This study showed that treadmill exercise application were effective treatment strategy on hyperlipidemia. Therefore, it could be considered as a treatment method in the patients with hyperlipidemia disease. Treadmill exercise, Hyperlipidemia, Blood components.

• 한국전문물리치료학회지
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• 제9권1호
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• pp.43-51
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• 2002

Physiological Cost Index (PCI) of walking has been widely used to predict oxygen consumption in healthy subjects or patients. The purpose of this study was to evaluate the predictability of physiological cost index of walking for the amount of exercise and cardiac function. Walking exercise was conducted in 67 healthy children (age 4-12) with a self-selected comfortable walking speed on the level surface. Walking speed was calculated, and heart rate was measured before and immediately after the walking. PCI was calculated for statistical analysis. The results were as follows; 1) The walking speed tends to increase and PCI of walking tends to decrease with age. There was significant difference in walking speed and PCI of walking among three age groups (p<.05). The change of walking heart rate tends to decrease with age, however, there was no significant difference among three age groups. 2) Linear regression equation between walking speed and age was 'Y (walking speed) = 2.124X (age) + 48.286' ($R^2$=.337), (p=.00). 3) The walking heart rate tends to decrease with age. Linear regression equation between walking heart rate and age was 'Y (walking heart rate) = 143.346 - 2.63X (age)' ($R^2$=.3425), (p=.00). 4) The walking heart rate decreased as body surface area (BSA) increased. Linear regression equation between walking heart rate and BSA was 'Y (walking heart rate) = 149.830 - 27.115X (BSA)' ($R^2$=.3066), (p=.00). In conclusion, these equations and PCI could be useful to quantify the variation of energy expenditure of children with pathological gait when compared with age-matched healthy children.

• 한국산학기술학회논문지
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• 제12권7호
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• pp.3088-3095
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• 2011

본 연구는 건강한 정상인의 필라테스 운동에 참여가 심혈관 및 호흡 변인에 미치는 영향을 분석하여, 필라테스 운동이 심폐계에 미치는 영향을 규명하고자 하였다. 건강한 정상인 36명을 무작위로 필라테스 운동에 참여하는 실험군과 대조군으로 나누었다. 필라테스 운동은 8주간 주 3회, 1회당 60분 동안 실시되었고 운동 전과 후에 혈압, 최대산소섭취량, 산소이용률, 그리고 무산소성 역치 등 심혈관 및 호흡계와 관련된 변인들을 측정하였다. 8주의 필라테스 운동을 시행한 실험군의 이완기 혈압을 제외한 나머지 심혈관 및 호흡 변인들이 필라테스 운동전에 비해 통계적으로 유의하게 상승되었으며, 대조군과의 비교에서도 수축기 혈압, 최대산소섭취량, 산소이용률, 그리고 무산소성역치가 통계적으로 유의한 차이가 나타났다. 본 연구의 결과에서 필라테스 운동은 심혈관 및 호흡 변인에 효과가 있으며 필라테스 운동이 유연성, 통증조절 및 재활 치료의 효과 이외에도 유산소 운동의 효과를 나타내는 것을 알 수 있다.

• The Journal of Korean Physical Therapy
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• 제19권4호
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• pp.1-14
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• 2007

Background: It is generally accepted that skeletal muscle contraction is triggered by nerve impulse and intracellular $Ca^{2+}\;([Ca^{2+}]_i)$ released from intracellular $Ca^{2+}$ stores such as sarcoplasmic reticulum (SR). Specifically, this process, called excitation-contraction (E-C) coupling, takes place at intracellular junctions between the plasma membrane, the transverse (T) tubule L-type $Ca^{2+}$ channel (dihydropyridine-sensitive L-rype $Ca^{2+}$ channel, DHPR, also called tetrads), and the SR $Ca^{2+}$ release channel (ryanodine-sensitive $Ca^{2+}$ release channel, RyR, also called feet) of internal $Ca^{2+}$ stores in skeletal muscle cells. Furthermore, it has been reported that the $Ca^{2+-}$ dependent and -independent contraction determine the expression of skeletal muscle genes, thus providing a mechanism for tightly coupling the extent of muscle contraction to regulation of muscle plasticity-related excitation-transcription (E-T) coupling. Purpose: Expression and activity of plasticity-associated enzymes in gastrocnemius muscle strips have not been well studied, however. Methods: Therefore, in this study the expression and phosphorylation of E-C and E-T coupling-related mediators such as protein kinases, ROS(reactive oxygen species)- and apoptosis-related substances, and others in gastrocnemius muscles from rats was examined. Results: I found that expression and activity of MAPKs (mitogen-activated protein kinases, ERK1/2, p38MAPK, and SAPK/JNK), apoptotic proteins (cleaved caspase-3, cytochrome c, Ref-1, Bad), small GTP-binding proteins (RhoA and Cdc42), actin-binding protein (cofilin), PKC (protein kinase C) and $Ca^{2+}$ channel (transient receptor potential channel 6, TRPC6) was observed in rat gastrocnemius muscle strips. Conclusion: These results suggest that MAPKs, ROS- and apoptosis-related enzymes, cytoskeleton-regulated proteins, and $Ca^{2+}$ channel may in part functionally import in E-C and E-T coupling from rat skeletal muscles.

• The Journal of Korean Physical Therapy
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• 제29권5호
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• pp.281-286
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• 2017

Purpose: The purpose of this study was to examine the correlations among the resting physical factors related to a six-minute walk test (6MWT) and to determine the effects of the resting physical factors on the distance and intensity related to the 6MWT in healthy female subjects. Methods: A total of 43 healthy female subjects ($22.84{\pm}3.90yrs$) participated in this study. They performed the 6MWT, and the physical factors related to the 6MWT were assessed. SPSS 20.0 was used to analyze the data, and the mean and standard deviation were calculated, and the collected data were analyzed by the Pearson's correlation coefficient (among physical factors related to 6MWT) and independent t-test (between six-minute walk distance [6MWD] groups and six-minute walk intensity [6MWI] groups). Results: The 6MWD had a significant negative correlation with the resting HR (beat/min) in healthy female subjects (r=-0.49, p<0.05). The 6MWI had a significant negative correlation with the resting systolic blood pressure (SBP) (r=-0.45, p<0.01). A comparison of the 6MWD revealed the long distance group (LDG, 700-799 m) to be significantly higher than the middle distance group (MDG, 600-699 m) in the 6MWI (%), %predicted distance (%), predicted VO2max (mL/kg/min), resting HR (beat/min), and resting SBP (mmHg)(p<0.05). In the comparison of 6MWI, the moderate intensity group (MIG, 64-75%HRmax) was significantly lower than the low intensity group (LIG, 50-63%HRmax) in the resting SBP (mmHg) (p<0.05). Conclusion: These results suggest that the resting physical factors are related to the 6MWD and 6MWI of the 6MWT in healthy females. In particular, SBP is associated with not only the 6MWD but also the 6MWI in 6MWT.

• 생체재료학회지
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• 제22권4호
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• pp.235-248
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• 2018

Background: Injectable hydrogels have been extensively researched for the use as scaffolds or as carriers of therapeutic agents such as drugs, cells, proteins, and bioactive molecules in the treatment of diseases and cancers and the repair and regeneration of tissues. It is because they have the injectability with minimal invasiveness and usability for irregularly shaped sites, in addition to typical advantages of conventional hydrogels such as biocompatibility, permeability to oxygen and nutrient, properties similar to the characteristics of the native extracellular matrix, and porous structure allowing therapeutic agents to be loaded. Main body: In this article, recent studies of injectable hydrogel systems applicable for therapeutic agent delivery, disease/cancer therapy, and tissue engineering have reviewed in terms of the various factors physically and chemically contributing to sol-gel transition via which gels have been formed. The various factors are as follows: several different non-covalent interactions resulting in physical crosslinking (the electrostatic interactions (e.g., the ionic and hydrogen bonds), hydrophobic interactions, ${\pi}$-interactions, and van der Waals forces), in-situ chemical reactions inducing chemical crosslinking (the Diels Alder click reactions, Michael reactions, Schiff base reactions, or enzyme-or photo-mediated reactions), and external stimuli (temperatures, pHs, lights, electric/magnetic fields, ultrasounds, or biomolecular species (e.g., enzyme)). Finally, their applications with accompanying therapeutic agents and notable properties used were reviewed as well. Conclusion: Injectable hydrogels, of which network morphology and properties could be tuned, have shown to control the load and release of therapeutic agents, consequently producing significant therapeutic efficacy. Accordingly, they are believed to be successful and promising biomaterials as scaffolds and carriers of therapeutic agents for disease and cancer therapy and tissue engineering.

• Clinical and Experimental Pediatrics
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• 제50권12호
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• pp.1200-1205
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• 2007

목 적 : SRT는 주로 RDS이 있는 미숙아에서 시행되어 왔다. 저자들은 폐질환을 주소로 인공 환기 요법이 필요했던 재태 주령 36주 이상의 신생아에서 폐표면 활성제를 이용한 보충요법의 투여 성적를 알아보고자 본 연구를 시행하였다. 방 법 : 1999년 7월부터 2004년 6월까지 계명대학교 동산의료원 신생아 집중치료실에 입원한 후 폐질환을 주소로 인공 환기 요법을 받았던 재태 주령 36주 이상의 환아 중 SRT를 시행 받았던 48명의 환아를 대상으로 원인 질환에 따라 MAP군과 RDS군 그리고 PN군으로 나누어서 후향적으로 의무기록을 분석하였다. 모든 대상 환아들에서 SRT를 시행하였으며 폐표면 활성제(Newfacten: 유한양행, Seoul, Korea)는 120 mg을 생리식염수 2-4 mL에 용해하여 평균 120 mg/kg 용량으로 투여하였는데, RDS 군에서는 투여 6시간 후에도 임상적 호전이 미약할 때는 1회 더 투여하였다. 각 군에서 폐표면 활성제 사용 전 후의 임상지표(흡입 산소 농도 및 산소화 지수)와 폐표면 활성제 투여 시점으로부터의 총 인공 환기기 사용 및 산소 투여 기간을 알아보았으며 성적(합병증 및 생존율)를 분석하였다. 결 과 : 총 48례의 환아 중 MAP 군: 15명, RDS 군: 27명, PN 군: 6명 이었다. 폐표면 활성제 투여 전의 산소화 지수는 MAP 군이 $21.8{\pm}3.2$, RDS 군에서 $18.3{\pm}4.5$, PD 군에서 $18.6{\pm}6.0$였고, SRT 후 12시간째의 산소화 지수는 MAP 군이 $8.61{\pm}6.75$, RDS 군에서 $4.98{\pm}0.69$, PD 군에서 $5.8{\pm}1.19$로 통계적으로 유의하게 개선되었다(P<0.05). 총 인공 환기기 사용기간은 MAP 군이 $4.9{\pm}1.2$일, RDS 군이 $5.5{\pm}2.8$일, PN 군이 $7.2{\pm}4.8$일 이었고 산소 투여기간은 MAP 군이$9.4{\pm}1.7$일, RDS 군이 $8.8{\pm}3.5$일, PN 군이 $10.3{\pm}5.6$일 이었다. 기흉, 신생아 폐 고혈압 지속증 등의 합병증 발생은 MAP 군에서 20%, RDS 군에서 25.9%, PD 군에서 50%로 나타났으며, 이중 RDS 군에서 SRT를 처음 시행한 시간에 따른 합병증의 발생 정도는 생후 12시간 전에 시행한 경우의 발생률이 15례 중 2례(13.3%)로 12시간 이후에 시행한 경우의 12례 중 7례(58.3%) 보다 유의하게 낮았다(P<0.05). 생존율은 MAP 군이 86.7%, RDS군과 PN 군이 모두 100%로 모든 군에서 양호한 예후를 보였다. 결 론 : 중증 폐 질환을 주소로 인공 환기 요법이 필요한 임신기간 36주 이상의 준 만삭 이상아에서의 폐표면 활성제 보충요법은 좋은 임상경과를 가지며 특히 RDS인 경우 생후 12시간 내 투여가 합병증을 줄여서 치료성적의 향상에 도움이 될 것으로 사료된다.

• Asian Pacific Journal of Cancer Prevention
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• 제16권13호
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• pp.5199-5203
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• 2015

Background: Helicobacter pylori (H.pylori) is associated with chronic gastritis, peptic ulcers, gastric adenocarcinomas and mucosa associated tissue lymphomas. Cytotoxin associated gene A (CagA) is one of the virulence factors of H.pylori. It is hypothesized that reactive oxygen species (ROS) play roles in H.pylori associated disease especially in development of gastric adenocarcinoma. Individuals infected with H.pylori bearing CagA produce more ROS than others. 8-hydroxydeoxyguanosine (8OHdG) is an in vitro marker of DNA damage and oxidative stress. The aim of this study was to investigate the relationship between 8OHdG level, H.pylori infection and CagA and alterations of serum 8OHdG level after H.pylori eradication. Materials and Methods: Patients admitted with dyspeptic complaints and upper gastrointestinal endoscopy were assessed. H.pylori was determined from histopathology of specimens. Serum 8OHdG levels of three groups (H.pylori negative, H. pylori positive CagA negative and H.pylori positive CagA positive) were compared. Patients with H.pylori infection received eradication therapy. Serum 8OHdG levels pretreatment and posttreatment were also compared. Results: In total, 129 patients (M/F, 57/72) were enrolled in the study. Serum 8OHdG level of H.pylori negative, H. pylori positive CagA negative and H.pylori positive CagA positive groups were significantly different ($5.77{\pm}1.35ng/ml$, $5.43{\pm}1.14ng/ml$ and $7.57{\pm}1.25ng/ml$ respectively, p=0.05). Furthermore, eradication therapy reduced serum 8OHdG level ($6.10{\pm}1.54ng/ml$ vs $5.55{\pm}1.23ng/ml$, p=0.05). Conclusions: Individuals infected with H.pylori bearing CagA strains have the highest serum 8OHdG level and eradication therapy decreases the serum 8OHdG level. To the best of our knowledge this is the first study that evaluated the effect of CagA virulence factor on serum 8OHdG level and the effect of eradication therapy on serum 8OHdG levels together. Eradication of CagA bearing H.pylori may prevent gastric adenocarcinoma by decreasing ROS. 8OHdG level may thus be a good marker for prevention from gastric adenocarcinoma.

• 한국의학물리학회지:의학물리
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• 제16권2호
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• pp.104-109
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• 2005

암치료에 사용되고 있는 광역학 치료는 환자에게 광민감제를 투여하고 다이오드 레이저(630 nm)를 조사하여 생성되는 단일상태 산소와 자유 라디칼에 의해 암조직을 괴사시키는 치료방법이다. 현재 광역학 치료의 문제점은 부피가 큰 종양이나 고형암에서는 빛이 종양전체를 투과할 수 없으므로 광역학 치료의 효과가 떨어지는 것이다. 따라서 이 문제를 해결하기 위하여 간질성 광역학 치료법을 개발하고자 한다. 생체조직내의 정확한 광선량 측정이 간질성광역학치료의 효과에 매우 중요한 영향을 주므로, 실험 연구에 사용된 계수는 실제 생체조직의 광학 계수이다. 생체조직 대부분은 가시광선영역에서 큰 산란계수를 가지며, 투과 깊이에 많은 영향을 미치는 것으로 확인되었다. 가시영역에서의 인체조직의 투과깊이는 약 $15\~20mm$이었다. 몬테칼로 시뮬레이션(Monte Carlo simulation)을 이용하여 생체조직내의 광전파, 광선량, 에너지율, 투과깊이를 잘 측정할 수 있음을 알았다. 그리고 이 시뮬레이션 결과를 가지고 고형암에 간질성 광역학 치료를 하여 치료효과를 확인하였다.

• Journal of Trauma and Injury
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• 제24권2호
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• pp.155-158
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• 2011

Mechanical ventilation is usually the treatment of choice for severe respiratory failure associated with trauma. However, in case of severe hypoxia, mechanical ventilation may not be sufficient for gas exchange in lungs. Patients with Acute Respiratory Distress Syndrome (ARDS) undergo difficulties in oxygen and carbon dioxide exchange. Extracorporeal Membrane Oxygenation (ECMO) is the ideal therapeutic option for those patients with severe traumatic injuries. ECMO allows lungs to reserve their functions and decreases further lung injuries while increasing survival rate at the same time. We report two cases of patients with traumatic ARDS and Multiple Organ Failure including compromised heart function. The preservation of lung function was successful using ECMO therapy.