Therapeutic effect of atorvastatin on interleukin-13-induced lung pathology

Purpose@#Asthma is a common chronic lung disease, in which interleukin (IL)-13 is implicated as a central regulator of IgE synthesis, mucus hypersecretion, airway hyperresponsiveness (AHR), and fibrosis. This study was designed to determine the anti-inflammatory effect of atorvastatin, a widely used lipid-lowering agent, on the IL-13-induced lung pathology through the modulation of macrophages. @*Methods@#Atorvastatin (40 mg/kg) was given to transgenic mice overexpressing IL-13 (IL-13 TG mice) and their wild type littermates by oral gavage for 2 weeks. AHR, numbers of inflammatory cells in the airway, and cytokine levels in IL-13 TG mice were measured.Using the alveolar macrophage cell line CRL-2456, the direct effect of atorvastatin on macrophages activated by recombinant IL-13 was assessed. @*Results@#Significant reduction in total leukocytes and alleviation of AHR were observed with administration of atorvastatin in IL-13 TG mice compared to those without atorvastatin treatment (P< 0.05). Atorvastatin administration resulted in upregulation of IL-10 in the lungs of IL-13 TG mice (P< 0.05). In addition, mRNA expression of connective tissue growth factor, fibronectin, and type III collagen as well as chord length enhanced by IL-13 overexpression were reduced by atorvastatin administration (P< 0.05). M2 macrophage markers, such as Ym-1 and CD206, were decreased, while M1 macrophage marker, inducible nitric oxide synthase, was increased upon atorvastatin treatment (P< 0.05). Administration of atorvastatin resulted in improved removal of apoptotic cells (P< 0.05). @*Conclusion@#The results of this study reveal a potential of atorvastatin as an effective antiasthmatic agent by reducing IL-13-induced lung inflammation via the modulation of macrophage polarization.

Does a robotic surgery approach offer optimal ergonomics to gynecologic surgeons?: a comprehensive ergonomics survey study in gynecologic robotic surgery / 부인종양

OBJECTIVE: To better understand the ergonomics associated with robotic surgery including physical discomfort and symptoms, factors influencing symptom reporting, and robotic surgery systems components recommended to be improved. METHODS: The anonymous survey included 20 questions regarding demographics, systems, ergonomics, and physical symptoms and was completed by experienced robotic surgeons online through American Association of Gynecologic Laparoscopists (AAGL) and Society of Robotic Surgery (SRS). RESULTS: There were 289 (260 gynecology, 22 gynecology-oncology, and 7 urogynecology) gynecologic surgeon respondents regularly practicing robotic surgery. Statistical data analysis was performed using the t-test, χ² test, and logistic regression. One hundred fifty-six surgeons (54.0%) reported experiencing physical symptoms or discomfort. Participants with higher robotic case volume reported significantly lower physical symptom report rates (p<0.05). Gynecologists who felt highly confident about managing ergonomic settings not only acknowledged that the adjustments were helpful for better ergonomics but also reported a lower physical symptom rate (p<0.05). In minimizing their symptoms, surgeons changed ergonomic settings (32.7%), took a break (33.3%) or simply ignored the problem (34%). Fingers and neck were the most common body parts with symptoms. Eye symptom complaints were significantly decreased with the Si robot (p<0.05). The most common robotic system components to be improved for better ergonomics were microphone/speaker, pedal design, and finger clutch. CONCLUSION: More than half of participants reported physical symptoms which were found to be primarily associated with confidence in managing ergonomic settings and familiarity with the system depending on the volume of robotic cases. Optimal guidelines and education on managing ergonomic settings should be implemented to maximize the ergonomic benefits of robotic surgery.

Demographic profile and extent of healthcare resource utilisation of patients with severe traumatic brain injury: still a major public health problem

<p><b>INTRODUCTION</b>Trauma is the fifth principal cause of death in Singapore, with traumatic brain injury (TBI) being the leading specific subordinate cause.</p><p><b>METHODS</b>This study was an eight-year retrospective review of the demographic profiles of patients with severe TBI who were admitted to the neurointensive care unit (NICU) of the National Neuroscience Institute at Tan Tock Seng Hospital, Singapore, between 2004 and 2011.</p><p><b>RESULTS</b>A total of 780 TBI patients were admitted during the study period; 365 (46.8%) patients sustained severe TBI (i.e. Glasgow Coma Scale score ≤ 8), with the majority (75.3%) being male. The ages of patients with severe TBI ranged from 14-93 years, with a bimodal preponderance in young adults (i.e. 21-40 years) and elderly persons (i.e. > 60 years). Motor vehicle accidents (48.8%) and falls (42.5%) were the main mechanisms of injury. Invasive line monitoring was frequently employed; invasive arterial blood pressure monitoring and central venous pressure monitoring were used in 81.6% and 60.0% of the patients, respectively, while intracranial pressure (ICP) measurement was required in 47.4% of the patients. The use of tiered therapy to control ICP (e.g. sedation, osmotherapy, cerebrospinal fluid drainage, moderate hyperventilation and barbiturate-induced coma) converged with international practices.</p><p><b>CONCLUSION</b>The high-risk groups for severe TBI were young adults and elderly persons involved in motor vehicle accidents and falls, respectively. In the NICU, the care of patients with severe TBI requires heavy utilisation of resources. The healthcare burden of these patients extends beyond the acute critical care phase.</p>

Brain Metastasis and Leptomeningeal Carcinomatosis in Breast Cancer / 대한암학회지

PURPOSE: Brain metastasis is estimated to occur in 20 to 40% of cancer patients, and meningeal involvement has been reported in 5% to 8% of cancer patients. Even if the prognosis is grave, standard treatment modality of brain metastasis or leptomeningeal carcinomatosis has not been established. We evaluated the prognosis and the clinical features of the brain and leptomeningeal metastasis of the breast cancer. MATERIALS AND METHODS: The 43 patients who was diagnosed as brain parenchymal metastasis or leptomeningeal carcinomatosis clinically, radiologically and/or cytologically were included in this study. The median age was 44(range: 27-61) years. RESULTS: The median duration from brain metastasis to death was 181 days(range: 8~1599), and the median duration from leptomeningeal carcinomatosis to death was 39 days(range: 25~152). Age(p=0.7174) and number of brain metastatic lesion(p=0.4097) did not influence the survival, but the presence of other systemic metastatic lesion affected the survival(p 0.0224). When we compared the survival rates of patients according to treatment modality, the patients with systemic chemotherapy versus patients without systemic chemotherapy showed differences(p= 0.0009). Patients treated with whole brain radiation only versus patients with whole brain radiation and other systemic management also showed different survival rate(p=0.0009). But intrathecal chemotherapy had no effect on survival. Well differentiated, solitary lesions were treated by operation and/or gamma-knife surgery, and their effects were good. CONCLUSION: Prolongation of survival was suggested with whole brain radiotherapy combined with systemic treatment in brain or leptomeningeal metastasis. Further study is expected to confirm this finding.