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Chung-Lin Lee,Ying-Hsu Chang,Chung-Yi Liu,Ming-Li Hsieh,Liang-Kang Huang,Yuan-Cheng Chu,Hung-Cheng Kan,Po-Hung Lin,Kai-Jie Yu,Cheng-Keng Chuang,Chun-Te Wu,See-Tong Pang,I-Hung Shao 대한비뇨의학회 2022 Investigative and Clinical Urology Vol.63 No.5
Purpose: Metastatic castration-resistant prostate cancer (mCRPC) has a poor prognosis. Abiraterone acetate (AA), enzalutamide, and chemotherapy are first-line treatments for patients with mCRPC. This study examined prognostic factors for AA response in the form of prostate-specific antigen (PSA) kinetics throughout androgen-deprivation therapy (ADT) in chemonaïve patients with mCRPC. Materials and Methods: We retrospectively included data from 34 chemonaïve patients with mCRPC who had received AA at some point between January 2017 and December 2018. We separated patients into two study arms according to the decrease in PSA percentages after use of AA for 3 months. We correlated PSA kinetics parameters with response and compared the two study groups with respect to PSA kinetics. Results: The patients’ median age was 77 years. In the total group of patients, 64% had a response to AA, whereas 35% did not. The ratio of the PSA level at nadir to the level during ADT was significantly higher in the AA-sensitive group (19.78 vs. 1.03, p=0.019). Conclusions: Patients who experienced a dramatic change in PSA level during ADT were more likely to be resistant to AA after progression to mCRPC. Chemotherapy rather than AA might be more suitable as a first-line treatment for these patients.
Organic Thin-Film-Transistor Arrays for Active-Matrix Display on Flexible Substrate
Cheng-Chung Lee,Hsiang-Yuan Cheng,Jia-Chong Ho,Tarng-Shiang Hu 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.48 No.I
Differently from a traditional inorganic transistor, the organic thin-film transistor can be fabricated at low temperature, so we can choose a light, thin, and cheap plastic substrate to replace glass substrate. Here, an organic thin-film transistor (OTFT) has been formed on plastic substrate. An active-matrix back plate with 64 × 128 pixels has been fabricated to drive a TNLCD. We achieved a field-effect mobility of 0.03 cm2/V·s and on/off current ratio of about 105 for the pentacene OTFT on plastic substrate. Besides vacuum deposition, these properties offer potential methods to fabricate OTFT on flat panel displays, such as spin coating, ink-jet printing, and even a roll-to-roll process.
Liu, Chi-Jen,Wang, Chang-Hai,Chien, Chia-Chi,Yang, Tsung-Yeh,Chen, Shin-Tai,Leng, Wei-Hua,Lee, Cheng-Feng,Lee, Kuen-Ho,Hwu, Y,Lee, Yao-Chang,Cheng, Chia-Liang,Yang, Chung-Shi,Chen, Y J,Je, J H,Margari IOP Pub 2008 Nanotechnology Vol.19 No.29
<P>We explored a very interesting gold nanoparticle system—pegylated gold in colloidal solution—and analyzed its uptake by mice colorectal adenocarcinoma CT26 tumor cells and the impact on the cell’s response to x-ray irradiation. We found that exposure to polyethylene glycol (PEG) modified (‘pegylated’) 4.7 ± 2.6 nm gold nanoparticles synthesized by a novel synchrotron-based method enhances the response of CT26 cells to x-ray irradiation. Transmission electron microscopy (TEM) and confocal microscopy revealed that substantial amounts of such nanoparticles are taken up and absorbed by the cells and this conclusion is supported by quantitative induced coupled plasma (ICP) results. Standard tests indicated that the internalized particles are highly biocompatible but strongly enhance the cell damage induced by x-ray irradiation. Synchrotron radiation Fourier transform infrared (SR-FTIR) spectromicroscopy analyzed the chemical aspects of this phenomenon: the appearance of C = O stretching bond spectral features could be used as a marker for cell damage and confirmed the enhancement of the radiation-induced toxicity for cells.</P>
Serial CT Findings of <i>Paragonimus</i> Infested Dogs and the Micro-CT Findings of the Worm Cysts
Lee, Chang Hyun,Im, Jung-Gi,Goo, Jin Mo,Lee, Hyun Ju,Hong, Sung-Tae,Shen, Cheng Hua,Chung, Doo Hyun,Son, Kyu Ri,Chang, Jung Min,Eo, Hong unknown 2007 KOREAN JOURNAL OF RADIOLOGY Vol.8 No.5
<P><B>Objective</B></P><P>To investigate the serial CT findings of <I>Paragonimus westermani</I> infected dogs and the microscopic structures of the worm cysts using Micro-CT.</P><P><B>Materials and Methods</B></P><P>This study was approved by the committee on animal research at our institution. Fifteen dogs infected with <I>P. westermani</I> underwent serial contrast-enhanced CT scans at pre-infection, after 10 days of infection, and monthly thereafter until six months for determining the radiologic-pathologic correlation. Three dogs (one dog each time) were sacrificed at 1, 3 and 6 months, respectively. After fixation of the lungs, both multi-detector CT and Micro-CT were performed for examining the worm cysts.</P><P><B>Results</B></P><P>The initial findings were pleural effusion and/or subpleural ground-glass opacities or linear opacities at day 10. At day 30, subpleural and peribronchial nodules appeared with hydropneumothorax and abdominal or chest wall air bubbles. Cavitary change and bronchial dilatation began to be seen on CT scan at day 30 and this was mostly seen together with mediastinal lymphadenopathy at day 60. Thereafter, subpleural ground-glass opacities and nodules with or without cavitary changes were persistently observed until day 180. After cavitary change of the nodules, the migratory features of the subpleural or peribronchial nodules were seen on all the serial CT scans. Micro-CT showed that the cyst wall contained dilated interconnected tubular structures, which had communications with the cavity and the adjacent distal bronchus.</P><P><B>Conclusion</B></P><P>The CT findings of paragonimiasis depend on the migratory stage of the worms. The worm cyst can have numerous interconnected tubular channels within its own wall and these channels have connections with the cavity and the adjacent distal bronchus.</P>
Lee Cheng-Han,진위성,Chen Wei-Chung 한국화학공학회 2023 Korean Journal of Chemical Engineering Vol.40 No.10
Desalination technologies have been widely implemented since the 1970s to solve the problem of freshwater scarcity. However, brine, the by-product of the desalination process, which has a higher salinity and total dissolved solids (TDS) than seawater, can cause severe environmental problems. For instance, brine could change the composition and temperature of seawater, decrease dissolved oxygen, and influence the organism’s habitat. Under this circumstance, circulating critical resources from brine is acceptable for minimizing brine disposal. This study employed two extraction systems (TMPD, 2,2,4-trimethyl-1,3-pentanediol and ALiCy, trioctyl/decylmethylammonium-bis(2,4,4-trimethilpentyl) phosphinate), which are solvent extraction and ionic liquid extraction, to recover boron from brine. The parameters, including pH value, concentrations of TMPD and ALiCy, O/A (organic/aqueous) and I/A (ionic liquid/aqueous) ratios, contacting time, and reaction temperature of boron extraction through the TMPD and ALiCy systems, would be optimized. The results reveal that extraction efficiencies of TMPD and ALiCy systems were 93.8% and 72.3%, respectively. Moreover, different agents can be evaluated to strip boron from TMPD and ALiCy. The boron product and the extractants could then be generated and reused. Briefly, the environmental hazards caused by the desalination brine and boron resources can be reduced and circulated through this research with two different extraction systems.
Impact of Adjuvant Chemotherapy in Elderly Breast Patients in Taiwan, A Hospital-Based Study
Lee, Hsiu Chuan,Chen, Wei Yu,Huang, Wen Tsung,Cheng, Kuo Chen,Tian, Yu Feng,Ho, Chung Han,Tsao, Chao Jung,Feng, Yin Hsun Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.10
Purpose: Decisions as to whether to provide adjuvant treatment in older breast cancer patients remains challenging. Side effects of chemotherapy have to be weighed against life expectancy, comorbidities, functional status, and frailty. To aid decision-making, we retrospectively analyzed 110 women with breast cancer treated with a curative intention from 2006 to 2012. Survival data with clinical and pathological parameters were evaluated to address the role of adjuvant chemotherapy in this study population. Method: A total of 110 elderly (>70 years) patients that received mastectomy at two hospitals in Taiwan were observed retrospectively for a medium of 51 months. After mastectomy, patients received conservative treatment or adjuvant chemotherapy, or hormone therapy following clinical guidelines or physician's preference. Data were collected from the cancer registry system. Results: Median age at diagnosis was 75.7 years. Thirty-five percent of patients received adjuvant chemotherapy, these having a significantly younger age ($mean=74.0{\pm}5.3$ vs $77.5{\pm}5.3$, p<0.001) and higher tumor staging (p=0.003) compared with their non-chemotherapy counterparts.Five-year overall survival was non-significantly higher in patients who received adjuvant chemotherapy (with chemotherapy 64.2% vs without chemotherapy 62.6%, p=0.635), while five-year recurrence free survival was non-significantly lower (with chemotherapy 64.1% vs without chemotherapy 90.5%, p=0.80). Conclusions: In this analysis, adjuvant chemotherapy tended to be given to patients with a younger age and higher tumor staging at our institute. It was not associated with any statistically significant improvement in survival and recurrence rate. Until age specific recommendations are available, physicians must use their clinical judgment and assess the tumor biology with the patient's comorbidities to make the best choice. Clinical trials focusing on this critical issue are warranted.
( Cheng-en Hsieh ),( Yuh-ming Hwu ),( Sheng-hsiang Li ),( Chung-hao Lu ),( Ming-huei Lin ),( Robert Kuo-kuang Lee ) 대한산부인과학회 2016 대한산부인과학회 학술대회 Vol.102 No.-
Objective: To investigate the effect of vascular endothelial growth factor (VEGF) and fibroblast growth factor 2 (FGF2) on revascularization, survival, and oocyte quality of cryopreserved, subcutaneously transplanted mouse ovarian tissue. Methods: Outbred ICR mice (n = 112) were used as the animal model. Vitrified mouse ovarian tissues were treated without (control group) or with VEGF and FGF2 before autologous subcutaneous transplantation. After transplantation for 2 or 3 weeks, grafts’ survival, angiogenesis, and oocyte quality were examined. Results: VEGF and FGF2 promoted revascularization and significantly increased the survival rate of subcutaneously transplanted cryopreserved ovarian tissues compared with the untreated grafted control. The two growth factors did not show long-term effects on the ovarian grafts. In contrast to the untreated ovarian grafts, active folliculogenesis was revealed as the number of various follicles was significantly higher or had an increased trend in the VEGF and FGF2-treated ones. Though the fertilization rate had no differences between VEGF/FGF2 and control group; however, the oocyte quality was much better in the VEGF/FGF2-treated grafts as demonstrated by the higher ratio of blastocyst development. Conclusions: Introducing of angiogenic factors such as VEGF and FGF2 may be a promising strategy to improve revascularization, survival, and oocyte quality of cryopreserved, subcutaneously transplanted mouse ovarian tissue.