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Chu S.-J.,National Defense Medical Center | Huang K.-L.,Institute of Undersea and Hyperbaric Medicine | Wu S.-Y.,Institute of Undersea and Hyperbaric Medicine | Ko F.-C.,Taoyuan Armed Forces General Hospital | And 3 more authors.
Inflammation | Year: 2013

Systemic administration of perfluorocarbons (PFCs) reportedly attenuates acute lung injury induced by acid aspiration and phorbol myristate acetate. However, the effects of PFCs on ischemia-reperfusion (IR)-induced lung injury have not been investigated. Typical acute lung injury was induced in rats by 60 min of ischemia and 60 min of reperfusion in isolated and perfused rat lung model. Rat lungs were randomly assigned to receive PBS (control), 1 % FC-77, IR only, or IR with different doses of FC-77 (0.1 %, 0.5 %, or 1 %). Subsequently, bronchoalveolar lavage fluid (BALF), perfusate, and lung tissues were collected to evaluate the degree of lung injury. IR caused a significant increase in the following parameters: pulmonary arterial pressure, capillary filtration coefficient, lung weight gain, lung weight/body weight ratio, wet/dry lung weight ratio, and protein concentration in BALF. TNF-α and cytokine-induced neutrophil chemoattractant-1 concentrations in perfusate samples and MDA concentration and MPO activities in lung tissues were also significantly increased. Histopathology showed increased septal thickness and neutrophil infiltration in the lung tissues. Furthermore, NF-κB activity was significantly increased in the lungs. However, pretreatment with 1 % FC-77 prior to IR significantly attenuated the increases in these parameters. In conclusion, our results suggest that systemic FC-77 administration had a protective effect on IR-induced acute lung injury. These protective mechanisms may have been mediated by the inhibition of NF-κB activation and attenuation of subsequent inflammatory response. © 2013 Springer Science+Business Media New York.

Lin Y.-S.,National Yang Ming University | Lin Y.-S.,Academia Sinica, Taiwan | Wang C.-H.,National Defense Medical Center | Wang C.-H.,Institute of Microbiology and Immunology | And 3 more authors.
Aging | Year: 2011

Hearing impairment following cochlear damage due to noise trauma, ototoxicity caused by aminoglycoside antibiotics, or age-related cochlear degeneration was linked to a common pathogenesis involving the formation of reactive oxygen species (ROS). Cochleae are more vulnerable to oxidative stress than other organs because of the high metabolic demands of their mechanosensory hair cells in response to sound stimulation. We recently showed that patients and mice with Huntington's disease (HD) have hearing impairment and that the dysregulated phosphocreatine (PCr)-creatine kinase (CK) system may account for this auditory dysfunction. Given the importance of noninvasive biomarkers and the easy access of hearing tests, the symptom of hearing loss in HD patients may serve as a useful clinical indicator of disease onset and progression of HD. We also showed that dietary creatine supplementation rescued the impaired PCr-CK system and improved the expression of cochlear brain-type creatine kinase (CKB) in HD mice, thereby restoring their hearing. Because creatine is an antioxidant, we postulated that creatine might enhance expression of CKB by reducing oxidative stress. In addition to HD-related hearing impairment, inferior CKB expression and/or an impaired PCr-CK system may also play an important role in other hearing impairments caused by elevated levels of ROS. Most importantly, dietary supplements may be beneficial to patients with these hearing deficiencies. © Lin et al.

Tzeng D.-S.,Kaohsiung Armed Forces Hospital | Tzeng D.-S.,Institute of Undersea and Hyperbaric Medicine | Chung W.-C.,Fooyn General Hospital | Lin C.-H.,Kaohsiung Armed Forces Hospital | Yang C.-Y.,Kaohsiung Medical University
BMC Health Services Research | Year: 2012

Background: Taiwans National Defense Bureau has been merging its hospitals and adjusting hospital accreditation levels since the beginning of 2006. These changes have introduced many stressors to the healthcare workers in these hospitals. This study investigates the association between job stress, psychological morbidity and quality of life in healthcare workers in three military hospitals. Methods. We posted surveys to 1269 healthcare workers in three military hospitals located in southern Taiwan. The surveys included the General Health Questionnaire (GHQ), the World Health Organization Quality of Life Questionnaire (WHOQOL-BREF), and the Effort-Reward Imbalance (ERI) Questionnaire. High effort-reward (ER) ratio and overcommitment were defined when scores fell into the upper tertile of the total distribution. Results: The survey was completed by 791 healthcare workers. On average, women reported a higher ERI than men. High ERI was associated with younger age, higher psychological morbidity, and poor physical and psychological QOL domains in this population. High ER ratio and high overcommitment were associated with psychological morbidity and poor QOL in both sexes. However, high ER ratio was not significantly associated with the social QOL domain in either sexes or the physical QOL domain in males. Conclusions: There was a clear association between ERI and QOL in the healthcare workers in the military hospitals under reorganization and accreditation in this study. We found ER ratio and overcommitment to be suitable indicators of job stress. © 2012 Tzeng et al.; licensee BioMed Central Ltd.

Tu J.-H.,Chiayi Branch of Taichung Veterans General | Chung W.-C.,Fooyn General Hospital | Yang C.-Y.,Kaohsiung Medical University | Tzeng D.-S.,Chiayi Branch of Taichung Veterans General | Tzeng D.-S.,Institute of Undersea and Hyperbaric Medicine
Asian Journal of Psychiatry | Year: 2012

Background: To determine the relative efficacy of acupuncture and zolpidem in the treatment of primary insomnia, we administered a sleep quality scale to thirty-three patients with primary insomnia randomly chosen to receive one of the two therapies at a psychosomatic clinic. Methods: A study in the psychosomatic clinic at a teaching hospital in southern Taiwan from November 2007 to November 2008. The 19 patients in acupuncture group underwent one acupuncture session a week. The 14 patients in the control group took zolpidem 1# (10. mg) every night. Members of both groups returned to our clinic once a week for four weeks. The main outcome measure was the Pittsburgh Sleep Quality Index (PSQI). Results: Both groups were found to have improved significantly. Using generalized estimating equation analysis to test the variance with group and time as factors, we found both groups improved over time at a similar rate (p=0.79). In regression analysis, setting the fourth total PSQI score to zero, the baseline PSQI score was 4.13 (p<0.001), the second score 1.32 (p=0.005), and the third 1.49 (p=0.03); men had a higher PSQI score 1.56 than women (p=0.02); the increasing age of one year would have lower PSQI score 0.08 (p<0.001) and increasing educational level of one year which would decrease PSQI score 0.25 (p=0.007). Conclusions: Acupuncture might be used as an alternative strategy compared to zolpidem for the treatment of primary insomnia. © 2011 Elsevier B.V.

Perng W.-C.,Tri Service General Hospital | Huang K.-L.,Institute of Undersea and Hyperbaric Medicine | Li M.-H.,Institute of Aerospace Medicine | Hsu C.-W.,National Defense Medical Center | And 3 more authors.
Clinical and Experimental Pharmacology and Physiology | Year: 2010

1. Glutamine is an amino acid that is used to treat various diseases. Glutamine has been reported to have protective effects in human pulmonary epithelia-like cells exposed to hyperoxia. However, the effects of glutamine in hyperoxia-induced lung injury have not been investigated in vivo. 2. Mice treated with saline or glutamine [(750 mg/kg) intravenously] were randomly exposed to hyperoxia for 48 or 72 h. Control mice treated with saline or glutamine were exposed to room air. Cytokine levels in bronchoalveolar lavage fluid (BALF), heat shock protein (HSP) 70, the wet/dry (W/D) weight ratio, malondialdehyde (MDA) levels, myeloperoxidase (MPO) activity and pathoglogical findings in lung tissue were evaluated to determine the effects of glutamine on acute lung injury. In addition, survival was monitored. 3. Lung expression of HSP70 was significantly enhanced in both the control (room air) and 48 and 72 h hyperoxic glutamine-treated mice. The W/D ratio, BALF concentrations of tumour necrosis factor-α and interleukin-6, MDA levels, MPO activity, neutrophil infiltration and interstitial oedema in lung tissue were significantly lower at 48 and 72 h of hyperoxia in glutamine-treated mice compared with saline-treated mice. 4. In a separate series of experiments evaluating survival, after 96 h continuous exposure to hyperoxia, all saline-treated mice died. In contrast, all glutamine-treated mice died after 108 h exposure to hyperoxia. 5. The data suggest that glutamine administered to mice during hyperoxia has a protective effect against hyperoxia-induced acute lung injury and improves survival. © 2010 Blackwell Publishing Asia Pty Ltd.

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