• Tuberculosis and Respiratory Diseases
• /
• 제46권3호
• /
• pp.363-371
• /
• 1999

연구배경: 유기인제는 국내에서 1950년대부터 농업용 살충제로 널리 사용되고 있으며, 최근 공업용 화공약품으로 사용이 증가하면서 이로 인한 중독 환자가 증가하고 있다. 아트로핀, PAM 또한 호흡부전 발생시 인공호흡기를 이용한 적극적인 치료로 사망률은 과거보다 감소하였으나, 호흡부전으로 인한 사망은 유기인제 중독의 주요한 사망 원인이다. 저자들은 유기인제 중독시 호흡부전의 발생 빈도 및 그 유발 인자를 관찰 분석하여 유기인제 중독으로 인한 사망률을 줄여 보고자 하였다. 방 법: 영남대학교 의과대학 부속병원에서 유기인제 중독증으로 진단 받은 111례를 대상으로 하였으며, 특히 호흡부전이 발생한 31례의 임상 소견 및 치료 방법, 혈중 cholinesterase 활성도 등을 조사하여 호흡부전 발생과 관계가 있는 요인들을 알아보았다. 결 과: 유기인제 중독환자 111례 중 자살 목적인 경우가 81례로 가장 많았고, 중독 정도도 가장 심하였다. 환자 중 15례에서 사망하였으며, 사망률은 14%였다. 호흡부전이 발생한 31례 중 23예가 중독 후 24시간이내, 8례는 25시간에서 96시간이내 발생하였으며, 중독 정도가 심할수록 호흡부전 발생 빈도가 높았다. 호흡부전이 발생한 31례 중 15례에서 사망하였고, 호흡부전이 발생하지 않은 경우에서는 사망한 예가 없었다. 16예의 환자에서 폐렴이 발생하였으며 이중 14례에서 호흡부전이 생겨, 폐렴이 생긴 대부분의 환자에서 호흡부전이 발생하였다. 심혈관 허탈은 5례에서 발생하였으며 이중 2례에서 호흡부전이 생겼으나 통계적으로 유의하지 않았다. 첫 24시간동안 아트로핀의 평균 요구량은 $56{\pm}65mg/dl$이고, 급성 호흡부전인 경우 아급성 호흡부전이나 호흡부전이 발생하지 않았을 때보다 아트로핀 요구량이 더 많아 중독 정도가 심할수록 아트로핀 요구량이 더 많았다. PAM으로 치료하였던 95례 중 26예와, 치료하지 않았던 16예 중 5례에서 호흡부전이 발생하여 PAM 치료 여부와 호흡부전 발생간의 유의한 차이를 보이지 않았다. 혈중 cholinesterase 활성도는 호흡부전이 발생하였을 때보다 인공호흡기 이탈시 7배정도 높았으며, 인공호흡기로 치료한 기간은 급성 호흡부전이 생겼을 때 유의하게 길었다. 결 론: 급성 유기인제 중독에 의한 호흡부전은 중독 후 첫 96시간 이내 주로 발생하며, 중독 정도와 폐렴 발생이 호흡부전 발생의 중요한 유발 인자로 생각된다. 따라서 중독 후 첫 96시간 동안 세심한 관찰이 필요하고 적극적인 아트로핀 투여와 기도 확보 및 흡인성 폐렴 방지로 호흡부전 발생 빈도를 줄일 수 있을 것으로 생각된다.

• Nutrition Research and Practice
• /
• 제16권3호
• /
• pp.298-313
• /
• 2022

BACKGROUND/OBJECTIVES: The effectiveness of natural compounds in improving athletic ability has attracted attention in both sports and research. Gynostemma pentaphyllum (Thunb.) leaves are used to make traditional herbal medicines in Asia. The active components of G. pentaphyllum, dammarane saponins, or gypenosides, possess a range of biological activities. On the other hand, the anti-fatigue effects from G. pentaphyllum extract (GPE) and its effective compound, gypenoside L (GL), remain to be determined. MATERIALS/METHODS: This study examined the effects of GPE on fatigue and exercise performance in ICR mice. GPE was administered orally to mice for 6 weeks, with or without treadmill training. The biochemical analysis in serum, glycogen content, mRNA, and protein expressions of the liver and muscle were analyzed. RESULTS: The ExGPE (exercise with 300 mg/kg body weight/day of GPE) mice decreased the fat mass percentage significantly compared to the ExC mice, while the ExGPE showed the greatest lean mass percentage compared to the ExC group. The administration of GPE improved the exercise endurance and capacity in treadmill-trained mice, increased glucose and triglycerides, and decreased the serum creatine kinase and lactate levels after intensive exercise. The muscle glycogen levels were higher in the ExGPE group than the ExC group. GPE increased the level of mitochondrial biogenesis by enhancing the phosphorylation of peroxisome proliferator-activated receptor-γ coactivator-1α (PGC-1α) protein and the mRNA expression of nuclear respiratory factor 1, mitochondrial DNA, peroxisome proliferator-activated receptor-δ, superoxide dismutase 2, and by decreasing the lactate dehydrogenase B level in the soleus muscle (SOL). GPE also improved PGC-1α activation in the SOL significantly through AMPK/p38 phosphorylation. CONCLUSIONS: These results showed that GPE supplementation enhances exercise performance and has anti-fatigue activity. In addition, the underlying molecular mechanism was elucidated. Therefore, GPE is a promising candidate for developing functional foods and enhancing the exercise capacity and anti-fatigue activity.

• Tuberculosis and Respiratory Diseases
• /
• 제60권2호
• /
• pp.187-193
• /
• 2006

배 경 : 결핵균의 성장 속도가 늦은 이유가 mammalian cell이나 대장균에 비해 결핵균 AK의 매우 낮은 활성도에 의한 것이라는 추측으로부터 AK1과 유사한 촉매능을 나타내는 AKmt 돌연변이 유전자와 human muscle-type AK 합성 유전자(AK1)를 각각 Mycobacterium/E.coli 발현벡터에 재조합(pMVAKmtDM, pEMAK1)하여 성장 속도가 매우 느린 BCG에 형질전환함으로써 이들 단백질들의 촉매능에 의한 성장 속도 변화가 일어나는지를 확인하고자 하였다. 방 법 : Human AK1의 촉매 활성도와 유사하도록 결핵균 AK (AKmt)유전자의 ATPbd와 LID domain을 돌연변이하여 제조한 유전자(AKmtDM)와 human muscle-type adenylate kinase 합성 유전자(AK1)를 Mycobacterium/E.coli 발현벡터에 클로닝하여 재조합 BCG를 제조하였고, 이들 재조합 BCG와 BCG Pasteur $1173P_2$ (wild-type)를 7H9 액체배지에 접종하여 2-3 일 간격으로 $A_{600}$ 값을 측정하였다. 결 과 : 재조합 BCG의 성장 속도는 Wild-type BCG의 성장 속도에 비해 변화가 없었다. 결 론 : 결핵균 adenylate kinase의 정확한 기능은 알 수 없으나, adenylate kinase의 촉매 활성도의 증가는 BCG의 성장 속도에는 영향을 주지 않는 것으로 판단된다.

• Biomolecules & Therapeutics
• /
• 제8권2호
• /
• pp.184-193
• /
• 2000

To evaluate GC-rhEPO, human erythropoietin produced by recombinant DNA technique, its general pharmacological properties were investigated in experimental animals administering intravenously and in vitro test system. GC-rhEPO at doses of 70,700 and 7,000 IU/kg body weight had no influence on general behavior, spontaneous motor activity, thiopental-inducted sleeping time, writhing syndrome induced by acetic acid, strychnine-induced convulsions, charchoal meal propulsion in mice, and body temperature, gastric juice secretion, urine and electrolyte excretion in rats. In anesthetized rabbits, GC-rhEPO (70, 700 and 7,000 lU/kg, i.v.) did not alter respiratory rate, blood pressure, heat rate. In in vitro experiments, GC-rhEPO did not affect the contractions of the isolated ileum of guinea pigs and the muscle twitchs of isolated neuromuscular junction of the rats. In addition, GC-rhEPO did not affect the blood coagulation time and ADP-induced platelet aggregation in plasma of rabbits. Taken together, these results indicate that GC-rhEPO does not induce any adverse effects in the experimental animals.

• 수면정신생리
• /
• 제11권1호
• /
• pp.10-16
• /
• 2004

Sleep is associated with definite changes in respiratory function in normal human beings. During sleep, there is loss of voluntary control of breathing and a decrease in the usual ventilatory response to both low oxygen and high carbon dioxide levels. Especially, rapid eye movement (REM) sleep is a distinct neurophysiological state associated with significant changes in breathing pattern and ventilatory control as compared with both wakefulness and non-rapid eye movement (NREM) sleep. REM sleep is characterized by erratic, shallow breathing with irregularities both in amplitude and frequency owing to marked reduction in intercostal and upper airway muscle activity. These blunted ventilatory responses during sleep are clinically important. They permit marked hypoxemia that occurs during REM sleep in patients with lung or chest wall disease. In addition, sleep-disordered breathing (SDB) is more frequent and longer and hypoventilation is more pronounced during REM sleep. Although apneic episodes are most frequent and severe during REM sleep, most adults spend less than 20 to 25% of total sleep time in REM sleep. It is, therefore, possible for patients to have frequent apneas and hypopneas during REM sleep and still have a normal apnea-hypopnea index if the event-rich REM periods are diluted by event-poor periods of NREM sleep. In this review, we address respiratory physiology according to sleep stage, and the clinical implications of SDB and hypoventilation aggravated during REM sleep.

• 대한한의학회지
• /
• 제33권3호
• /
• pp.54-73
• /
• 2012

Objectives: To investigate the scientific evidence of Korean Medicine (KM), papers on Socheongryong-tang (Xiaoqinglong-tang), which is frequently used in medical clinics or hospitals of Korean medicine, were collected and analyzed. Methods: Papers were classified by the registration of domestic or international journals, the year of publication, experimental models and the subjects of biological activities. The mechanisms of biological activity in accordance with therapeutic effects of Socheongryong-tang (Xiaoqinglong-tang) were noted. Results: Among 98 papers included, 21 were published in domestic journals whereas 35 were in Chinese journals and 43 in Japanese journals. Most reported biological activities were amelioration of asthma. Socheongryong-tang (Xiaoqinglong-tang) regulated interleukin and interferon and immunoglobulin, inhibited the production of nerve growth factor, endotheliln-1, nitric oxide, toll-like receptor-4, p-Akt and increased extracellular signal regulated kinase and cyclin D1, which led to decreased bronchi inflammation and bronchoconstriction, and inhibited the proliferation of airway smooth muscle cells, mucus secretion and airway hyperresponsiveness. In addition, Socheongryong-tang (Xiaoqinglong-tang) also restored tissues injured by asthma so that respiratory function recovered. Conclusions: Amelioration of asthma by Socheongryong-tang (Xiaoqinglong-tang) is supported by objective and scientific evidence.

• 대한치과의사협회지
• /
• 제53권9호
• /
• pp.602-609
• /
• 2015

The aim of this document is to evaluate the effect of bite balance on physical fitness and motor capacity to determine the importance of the occlusal stability as a possible action mechanism of occlusal appliance including mouthguards on physical performances. We all remember that day when the prominent athlete was in the news wearing a mouthguard to improve human athletic performance. I once had investigated the determinants of athletic performance in all sorts of sports. Most of the studies had overinterpretation of results and lack of evidence to support the information. However, I discovered great expectations for new possibility in this field and settled for a more academic approach to this intriguing subject. The followings are some examples of the subject 1. Archers who wore occlusal appliances to increase the vertical dimension of occlusion by 2~3mm increased their ability to focus and to maintain good sense of balance. Their accuracy rate has been improved. The appliance was made of acrylic resin (a type of plastic). 2. Canoe players who wore occlusal appliances to increase the vertical dimension of occlusion by 5mm surpassed longtime competitor and won the race with 10 seconds gap. 3. A cycle rider who wore an occlusal appliance to treat his malocclusion surpassed his old record from 10.8 seconds to 10.3 seconds. His muscle reflexes (anaerobic exercise) and endurance (aerobic exercise) has been enhanced. 4. Occlusal appliances had a good effect on athletic performance in most sports such as swimming, diving, and weightlifting. As for the clenching on dentition, people clench their teeth when they push their physical and mental limits during sports activities. Clenching can be induced by physical exertion when maximum muscle strength is retained and this is similarly found in different types of exercises. In addition, restraint of respiratory function is observed. Therefore, creating a occlusal balance with occlusal appliance or mouthguard promoted a favorable influence when an athlete clenches.

• Tuberculosis and Respiratory Diseases
• /
• 제79권3호
• /
• pp.143-152
• /
• 2016

Background: Idiopathic pulmonary fibrosis (IPF) is a progressive and lethal lung disease characterized by the accumulation of excessive fibroblasts and myofibroblasts in the extracellular matrix. The transforming growth factor ${\beta}1$ (TGF-${\beta}1$)-induced epithelial-to-mesenchymal transition (EMT) is thought to be a possible source of fibroblasts/myofibroblasts in IPF lungs. We have previously reported that apolipoprotein A1 (ApoA1) has anti-fibrotic activity in experimental lung fibrosis. In this study, we determine whether ApoA1 modulates TGF-${\beta}1$-induced EMT in experimental lung fibrosis and clarify its mechanism of action. Methods: The A549 alveolar epithelial cell line was treated with TGF-${\beta}1$ with or without ApoA1. Morphological changes and expression of EMT-related markers, including E-cadherin, N-cadherin, and ${\alpha}$-smooth muscle actin were evaluated. Expressions of Smad and non-Smad mediators and TGF-${\beta}1$ receptor type 1 ($T{\beta}RI$) and type 2 ($T{\beta}RII$) were measured. The silica-induced lung fibrosis model was established using ApoA1 overexpressing transgenic mice. Results: TGF-${\beta}1$-treated A549 cells were changed to the mesenchymal morphology with less E-cadherin and more N-cadherin expression. The addition of ApoA1 inhibited the TGF-${\beta}1$-induced change of the EMT phenotype. ApoA1 inhibited the TGF-${\beta}1$-induced increase in the phosphorylation of Smad2 and 3 as well as that of ERK and p38 mitogen-activated protein kinase mediators. In addition, ApoA1 reduced the TGF-${\beta}1$-induced increase in $T{\beta}RI$ and $T{\beta}RII$ expression. In a mouse model of silica-induced lung fibrosis, ApoA1 overexpression reduced the silica-mediated effects, which were increased N-cadherin and decreased E-cadherin expression in the alveolar epithelium. Conclusion: Our data demonstrate that ApoA1 inhibits TGF-${\beta}1$-induced EMT in experimental lung fibrosis.

• The Korean Journal of Physiology
• /
• 제29권2호
• /
• pp.309-321
• /
• 1995

In the present study, the relationship between the somatosympathetic reflexes and arterial blood pressure responses to electrical stimulation of the peripheral nerve was investigated in cats anesthetized with ${\alpha}-chloralose$. Single sympathetic postganglionic fiber activities were recorded from the hindlimb muscle and skin nerves and also from the cervical and abdominal sympathetic chains. Effects of the morphine on responses of the sympathetic nerve and arterial blood pressure to activation of the peripheral $A{\delta}-$ and C-afferent nerves were analyzed. The following results were obtained. 1) Arterial blood pressure was depressed by peripheral AS-afferent stimulation (A-response) and was elevated during C-afferent activation (C-response). 2) Intravenously administered morphine enhanced the C-response while the A-response decreased insignificantly, Only the C-response was decreased by intrathecal morphine. 3) All the ten recorded cutaneous sympathetic fibers showed periodic discharge pattern similar to respiratory rhythm and five of them also showed cardiac-related rhythm. However, most of the muscular sympathetic fibers had cardiac-related rhythm and only four fibers showed respiratory rhythm. 4) Morphine decreased the sympathetic C-reflex elicited by the peripheral C-afferent activation and the abdominal sympathetic A-reflex was also decreased by morphine. From the above results, it was concluded that supraspinal mechanisms were involved in the enhanced arterial pressor response to peripheral C-afferent activation by intravenous morphine.

• 대한치과의사협회지
• /
• 제53권1호
• /
• pp.47-56
• /
• 2015

Obstructive sleep apnea (OSA), most common respiratory disorder of sleep, is characterized by intermittent partial or complete occlusions of the upper airway due to loss of upper airway dilating muscle activity during sleep superimposed on a narrow upper airway. Termination of these events usually requires arousal from sleep and results in sleep fragmentation and hypoxemia, which leads to poor quality of sleep, excessive daytime sleepiness, reduced quality of life and numerous other serious health consequences Untreated OSAS can cause various problems such as hypertension, diabetes, stroke, cardiac disease, daytime sleepiness. Various treatments are available, including non-surgical treatment such as medication or modification of life style, surgical treatment, continuous positive airway pressure (CPAP) and oral appliance (OA). Oral appliance is known to be effective in mild to moderate OSA, also genioglossus muscle advancement (GA) or maxillomandibluar advancement (MMA) is a good option for OSA patients with muscular or skeletal problems. Although the prevalence of OSA is increasing, the proportion of the patient treated by dentist is still very law. Dentists need to understand the mechanism of OSA and develop abilities to treat OSA patients with dental problems. The purpose of this paper is to give a brief overview about OSA and the dentist's role in OSA patients.