• IMMUNE NETWORK
• /
• 제15권3호
• /
• pp.142-149
• /
• 2015

Lung fibrosis is a life-threatening disease caused by overt or insidious inflammatory responses. However, the mechanism of tissue injury-induced inflammation and subsequent fibrogenesis remains unclear. Recently, we and other groups reported that Th17 responses play a role in amplification of the inflammatory phase in a murine model induced by bleomycin (BLM). Osteopontin (OPN) is a cytokine and extracellular-matrix-associated signaling molecule. However, whether tissue injury causes inflammation and consequent fibrosis through OPN should be determined. In this study, we observed that BLM-induced lung inflammation and subsequent fibrosis was ameliorated in OPNdeficient mice. OPN was expressed ubiquitously in the lung parenchymal and bone-marrow-derived components and OPN from both components contributed to pathogenesis following BLM intratracheal instillation. Th17 differentiation of $CD4^+$ ${\alpha}{\beta}$ T cells and IL-17-producing ${\gamma}{\delta}$ T cells was significantly reduced in OPN-deficient mice compared to WT mice. In addition, Th1 differentiation of $CD4^+$ ${\alpha}{\beta}$ T cells and the percentage of IFN-$\gamma$-producing ${\gamma}{\delta}$ T cells increased. T helper cell differentiation in vitro revealed that OPN was preferentially upregulated in $CD4^+$ T cells under Th17 differentiation conditions. OPN expressed in both parenchymal and bone marrow cell components and contributed to BLM-induced lung inflammation and fibrosis by affecting the ratio of pathogenic IL-17/protective IFN-$\gamma$ T cells.

• 대한한방내과학회지
• /
• 제25권4호
• /
• pp.93-104
• /
• 2004

Objectives : The aim was to identify the inhibitory effects of Liriopis Tuber on bleomycin-induced lung fibrosis by analysing the changes of imflammatory cell cytokines and SHI(Semiquantitative Histological Index), Materials and Methods : In this study fibrosis prone C57BL/6J mice were used. Control group was treated with blomycin(0.06mg/0.1 ml) by IT(intratracheal) instillation which is a popular method of inducing lung fibrosis and sample group took Liriopis Tuber water extract(38.0mg/10g body weight) orally for 14 days after IT instillation of blomycin. We measured the total and differential count of WBC, $IFN-{\gamma}$ & IL-4 in mice BALF and SHI(Semiquantitative Histological Index) from lung tissues of mice. BALF and lung tissues of mice were taken 14 days after IT instillation of blomycin. Results : In sample group total WBC count, proportion of neutrophil, SHI and IL-4 significantly(p<0.05) decreased, proportion of macrophage significantly(p<0.05) increased and proportion of lymphocyte, $IFN-{\gamma}$ did not decrease significantly. Conclusions : This study suggests that Liriopis Tuber has an inhibitory effects of pulmonary fibrosis by attenuation of inflammation and Th2 immune response. To determine whether this herbal medicine contribute to cure and prophylaxis of pulmonary fibrosis, further studies on the role of $IFN-{\gamma}$ relating to fibrosis are required.

• 대한수의학회지
• /
• 제26권2호
• /
• pp.307-319
• /
• 1986

성숙한 A/J, $C_{57}BL/6N$, DBA/2 및 NIH-GP계(系) 마우스에 benzo(a) pyrene과 charcoal powder를, $C_{57}/6N$ 및 NIH-GP계(系) 마우스에 Urethan을 기관내(氣管內) 주입(注入)하여 폐장(肺臟)의 종양발생(腫瘍發生)과 조직변화(組織變化)를 관찰(觀察)한 바 다음과 같은 결과(結果)를 얻었다. Benzo(a)pyrene을 주입(注入)한 군(群)에서는 편평상피암(扁平上皮癌) 및 선암(腺癌), 그리고 편평상피암(扁平上皮癌)과 선암(腺癌)의 혼합 발생예(例)를 볼 수 있었다. 이와 같은 병변(病變)은 A/J 및 $C_{57}BL/6N$계(系) 마우스에서 발생률(發生率)이 높았으며 A/J계(系) 마우스에서 편평상피암(扁平上皮癌)의 발생(發生) 및 분화(分化)가 현저하였다. 한편 DBA/2 및 NIH-GP계(系) 마우스에서는 종양(腫瘍) 발생률(發生率)이 극히 낮았다. Benzo(a)pyrene의 주입시(注入時) 동일 계통의 마우스에서도 대량을 주입(注入)할 때 선암(腺癌)보다 편평상피암(扁平上皮癌)의 발생(發生)이 많았으며 A/J계(系) 마우스에서는 편평상피암(扁平上皮癌) 단독(單獨) 발생예(發生例)가 다수 관찰(觀察)되었고 $C_{57}BL/6N$계(系) 마우스에서는 선암(腺癌) 및 선암(腺癌)과 편평상피암(扁平上皮癌)의 혼합 형태(形態)가 주(主)로 관찰(觀察)되었다. 그리고 기관지상피(氣管支上皮)의 편평상피화생(扁平上皮化生) 및 편평상피암(扁平上皮癌)의 발생시(發生時) alcian blue-PAS 양성반응세포가 관여함을 알 수 있었고 선종양조직(腺腫樣組織) 발생예(發生例)에서도 편평상피화생(扁平上皮化生) 및 편평상피암(扁平上皮癌)으로 분화(分化)되는 경우도 관찰(觀察)되었다. Urethan 주입군(注入群)은 극히 낮은 종양발생률(腫瘍發生率)을 나타내어 발암물질(發癌物質)의 종류(種類), 용량(用量) 및 마우스의 계통(系統)에 따라 종양(腫瘍)의 발생률(發生率) 및 형태(形態)의 차이가 인정되었다.

• The Korean Journal of Physiology and Pharmacology
• /
• 제19권5호
• /
• pp.401-411
• /
• 2015

Aldose reductase (AR) is known to play a crucial role in the mediation of diabetic and cardiovascular complications. Recently, several studies have demonstrated that allergen-induced airway remodeling and ovalbumin-induced asthma is mediated by AR. Epalrestat is an aldose reductase inhibitor that is currently available for the treatment of diabetic neuropathy. Whether AR is involved in pathogenesis of pulmonary fibrosis and whether epalrestat attenuates pulmonary fibrosis remains unknown. Pulmonary fibrosis was induced by intratracheal instillation of bleomycin (5 mg/kg) in rats. Primary pulmonary fibroblasts were cultured to investigate the proliferation by BrdU incorporation method and flow cytometry. The expression of AR, TGF-${\beta}_1$, ${\alpha}$-SMA and collagen I was analyzed by immunohistochemisty, real-time PCR or western blot. In vivo, epalrestat treatment significantly ameliorated the bleomycin-mediated histological fibrosis alterations and blocked collagen deposition concomitantly with reversing bleomycin-induced expression up-regulation of TGF-${\beta}_1$, AR, ${\alpha}$-SMA and collagen I (both mRNA and protein). In vitro, epalrestat remarkably attenuated proliferation of pulmonary fibroblasts and expression of ${\alpha}$-SMA and collagen I induced by TGF-${\beta}_1$, and this inhibitory effect of epalrestat was accompanied by inhibiting AR expression. Knockdown of AR gene expression reversed TGF-${\beta}_1$-induced proliferation of fibroblasts, up-regulation of ${\alpha}$-SMA and collagen I expression. These findings suggest that AR plays an important role in bleomycin-induced pulmonary fibrosis, and epalrestat inhibited the progression of bleomycin-induced pulmonary fibrosis is mediated via inhibiting of AR expression.

• 사상체질의학회지
• /
• 제28권2호
• /
• pp.147-162
• /
• 2016

Objectives The objective of this study is to develop a taeeumin animal-experimental model induced lung fibrosis with Bleomycin and evaluate the effect on obesity in this animal-experimental model.Methods The subjects were divided into 3 groups : normal group, high fat diet(HFD) control group, and HFD group administered with bleomycin(n=10 per group). To develop taeeumin animal-experimental model with reduced respiratory metabolism, 8-week-old C57BL/6 mice were administered with 0.03ml solution of bleomycin 1U/ml dissolved in distilled water, intratracheal(IT), once. Then, the HFD control group and the experimental group were fed with high fat diet for 6 weeks. Airway hyperresponsiveness(AHR) to methacholine was measured at the 1st and 3rd week after bleomycin was administered. Food intake and body weight were measured at regular time weekly. After the final experiment, blood was gathered by cardiac puncture for bloodchemical examination and organs(liver, fatty tissue) were remoed, weighted, and mRNA was analyzed.Results and Conclusions Through the experiment, it was found that Bleomycin induced Taeeumin animal-experimental models have leptin resistace. In the experimental group administered with Bleomycin, fatty acid synthesizing gene expression increased and energy metabolizing gene expression decreased. As mRNA expression of adiponectin decreased, it was found that Taeeuim animal-experimental model is susceptible to metabolic syndrome and cardiovascular diseases.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
• /
• 제36권3호
• /
• pp.197-201
• /
• 2010

Introduction: In a surgery of the oral cavity, nasotracheal intubation is often carried out to secure the surgical field. By passing a tracheal tube through the nasal cavity to the pharynx, the nasotracheal intubation can lead to complications that do not occur with oral intubation, such as nasal bleeding and submucosal aberration etc. The purpose of this study is to examine the method of CT evaluation and pretreatment for a safe nasotracheal intubation. Materials and Methods: Among 30 patients who orthognathic surgery was performed at Chung-Ang University Hospital during the period August 2009 to October 2009, 30 patients were included. The 30 patients were divided into two groups; 15 patients intubated with CT evaluation with pretreatment, and the other 15 patients intubated with no pretreatment. We evaluated nasal bleeding of the two groups during nasotracheal intubation. Results: CT evaluation with pretreatment group had a significantly lower incidence of nasal bleeding than the group with no pretreatment. Conclusion: CT evaluation with pretreatment helps to minimize nasal bleeding during nasotracheal intubation.

• 대한상한금궤의학회지
• /
• 제13권1호
• /
• pp.21-44
• /
• 2021

Objective : This study aimed to assess the preventive effect of Bupleuri Radix aqueous extracts (BR) and red koji-fermented BR (fBR) in lipopolysaccharide (LPS)-induced acute lung injury in a rat model. Methods : Rats were administered 30, 60, or 120 mg/kg/day of fBR for 28 days before LPS treatments. All rats were sacrificed 5 h after LPS treatment (500 ㎍/head, intratracheal instillation). Body weights, lung weights, pulmonary transcapillary albumin transit, arterial gas parameters (pH, partial pressure [Pa] of O2, PaCO2), bronchoalveolar lavage fluid (BALF) protein, lactate dehydrogenase (LDH), tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β), total cell numbers, neutrophil/alveolar macrophage ratios, lung malondialdehyde (MDA), and myeloperoxidase (MPO) were measured. In addition, histopathological changes including the luminal surface of alveoli (LSA), thickness of alveolar septum, and number of polymorphonuclear neutrophils (PMNs) were checked. Results : LPS injection led to increases in lung weights, pulmonary transcapillary albumin transit, BALF protein, LDH, TNF-α and IL-1β contents, total cells, neutrophil and alveolar macrophage ratios, lung MDA, MPO, alveolar septum thickness, and PMNs, and decreases in PaCO2 and pH of arterial blood and LSA. However, these LPS-induced acute lung injuries were inhibited by pretreatment of 30, 60, and 120 mg/kg of fBR. The most favorable effects were seen with 30 mg/kg fBR as compared with 60 mg/kg of α-lipoic acid and BR. Conclusions : fBR showed preventive effects on LPS-induced acute lung injury, which resembles acute respiratory distress syndrome. The mechanisms of action were likely via antioxidant and anti-inflammatory means.

• 대한본초학회지
• /
• 제28권1호
• /
• pp.65-71
• /
• 2013

Objectives : Asthma is a chronic, complex respiratory disease, caused by airway obstruction, airway eosinophilic inflammation(AEI), and airway hyperresponsiveness(AHR). This study was conducted to determine whether oral administration of crude water extracts of Pinellia ternate Breitenbach(PTB) has an antiasthmatic potential in the treatment of asthma in mice. Methods : Asthmatic AEI and AHR were induced by systemic sensitization to ovalbumin(OVA) by intratracheal instillation with 0.1 mg/mL suspension of diesel exhaust particles(DEP) once a week for 10 weeks in BALB/c mice. Crude PTB water extracts(50 mg/kg and 200 mg/kg) were orally administered 5 times a week for 10 weeks. Cyclosporin(10 mg/kg) was administrered the same manner as a positive control. Results : Long-term treatment with crude PTB water extracts suppressed the infiltration of inflammatory cells, including eosinophils, into airways from blood. It also reduced asthmatic AEI and AHR by attenuating the increase in the levels of cytokines such as interleukin(IL)-4, IL-5 and IL-13 in bronchoalveolar lavage fluid(BALF), as well as the levels of histamine and OVA-specific IgE in blood. However, the effect of crude PTB water extracts(200 mg/kg) was not likely to be stronger than that of cyclosporin(10 mg/kg). Conclusion : These results suggest that crude PTB water extracts have inhibitory effects on AEI and AHR in a mouse model of asthma and may act as a potential Th2 cytokine antagonist, and have a therapeutic effect on allergic asthma.

• Journal of Trauma and Injury
• /
• 제36권3호
• /
• pp.206-209
• /
• 2023

Purpose: Since its implementation, flexible fiberoptic bronchoscopy (FBS) has played an important role in the diagnosis and treatment of tracheobronchial tree and pulmonary disease. Although FBS is often performed by endoscopists, it has also been performed by surgeons, albeit rarely. This study investigated FBS from the surgeon's perspective. Methods: This retrospective study included patients who underwent FBS performed by a single thoracic surgeon between March 2017 and December 2021. Accordingly, the epidemiology, purpose, results, and complications of FBS were analyzed. Results: A total of 47 patients received FBS, whereas 13 patients underwent repeat FBS. Their mean age was 60.7 years. The main organs injured involved the chest (n=22), brain (n=9), abdominal organ (n=7), cervical spine (n=4), extremities (n=4), and face (n=1). The average Injury Severity Score was 22.5. Indications for FBS included atelectasis or haziness on chest x-ray (n=34), pneumonia (n=17), difficult ventilator management (n=7), percutaneous dilatory tracheostomy (n=3), blood aspiration (n=2), foreign body removal (n=2), and intubation due to a difficult airway (n=1). The findings of FBS were mucous plugs (n=36), blood and blood clots (n=16), percutaneous dilatory tracheostomy (n=3), foreign bodies (n=2), granulation tissue at the tracheostomy site (n=2), tracheostomy tube malposition (n=1), bronchus spasm (n=1), difficult airway intubation (n=1), and negative findings (n=5). None of the patients developed complications. Conclusions: FBS is an important modality in the trauma field that allows for the possibility of diagnosis and therapy. With sufficient practice, surgeons may safely perform FBS at the bedside with relative ease.

• 중환자간호학회지
• /
• 제17권1호
• /
• pp.68-82
• /
• 2024

Purpose : This scoping review was designed to identify gaps in knowledge and guide future directions for clinical nursing practices and research on oral hygiene care for endotracheally intubated patients in Korean intensive care units. Methods : We conducted a scoping review using the methodological framework proposed by Arksey and O'Malley. PubMed, CINAHL, RISS, Science On, and DBpia databases were searched. Two reviewers independently selected the studies and extracted data. A total of 445 studies were identified, of which 17 were included in the final analysis. Results : No research has been conducted from 2021 to the present. A total of 12 instruments were utilized in 13 studies to assess the effectiveness of oral hygiene care. All studies investigating the effectiveness of oral hygiene care have consistently documented that chlorhexidine has the most significant effect. The frequency and time of oral hygiene care were each examined in one study. Conclusion : A research study is necessary to develop a measurement tool for assessing the effectiveness of oral hygiene care suitable for endotracheal intubated patients in intensive care units. Interventional studies should be conducted to determine the effects of chlorhexidine and the appropriate frequency and time of oral hygiene care. Thereafter, revision of domestic evidence-based clinical practice guidelines by integrating these results will be necessary.