Paper-based Cell Culture Microfluidic System

Fang Fang Tao,Xia Xiao,Kin Fong Lei,I-Chi Lee 한국바이오칩학회 2015 BioChip Journal Vol.9 No.2

In the past decades, glass/PDMS-basedmicrofluidic systems have been rapidly developed to provide homogenous and stable microenvironment for culturing cells. Although these excellent demonstrations involve much simplified operations than traditional cell culture protocol, but they are still not readily accessible to untrained personnel and not appropriate to operate in conventional biological laboratories. In this work, cellulose filter papers were used for the substrates of the cell culture microfluidic system, which provides a convenient tool for cell-based assay. A paper was patterned with culture areas and channels by wax printing technique. Medium or tested substance can be passively perfused to the culture areas. Analyses of cyto-compatibility, cell proliferation, cell morphology, and cell chemosensitivity were performed to confirm the possibility of the paper-based system. Theculture system could provide a platform for a wide range of cell-based assays with applications in drug screening and quantitative cell biology. This work demonstrated a paper-based cell culture microfluidic system and the system is inexpensive, disposable, and compatible to the existing culture facility. In the past decades, glass/PDMS-based microfluidic systems have been rapidly developed to provide homogenous and stable microenvironment for culturing cells. Although these excellent demonstrations involve much simplified operations than traditional cell culture protocol, but they are still not readily accessible to untrained personnel and not appropriate to operate in conventional biological laboratories. In this work, cellulose filter papers were used for the substrates of the cell culture microfluidic system, which provides a convenient tool for cell-based assay. A paper was patterned with culture areas and channels by wax printing technique. Medium or tested substance can be passively perfused to the culture areas. Analyses of cyto-compatibility, cell proliferation, cell morphology,and cell chemosensitivity were performed to confirm the possibility of the paper-based system. The culture system could provide a platform for a wide range of cell-based assays with applications in drug screening and quantitative cell biology. This work demonstrateda paper-based cell culture microfluidic system and the system is inexpensive, disposable, and compatible to the existing culture facility.

The Role of Corporate Social Responsibility Engagement on the Relationship between Country-of-Origin Effect and Brand Awareness

Fang, Yuan Tao · Oh, Han-Mo 충북대학교 산업경영연구소 2019 産業과 經營 Vol.32 No.2

본문 참고

Faithful Quantum Secure Communication with Authentication based on Bell States and Classical XOR Resisting Collective Noise

Tao Fang,Min Li 보안공학연구지원센터 2015 International Journal of Security and Its Applicat Vol.9 No.9

Two faithful quantum secure communication and authentication schemes based on Bell states and classical XOR operation are proposed, which withstand collective noises. The authentication and eavesdropping detection are completed by using logical decoy photons generating by previously shared identity string. The logical decoy photons are decoherence-free states over the two collective noisy channels respectively. The transmission of secret message is a one-time pad system, which guarantees the absolute security of secret message. Encoding secret message after particle transmission ensures the accuracy of secret message.

A Hybrid Feature Gene Selection Method based on Fuzzy Neighborhood Rough Set with Information Entropy

Tao Chen,Zenglin Hong,Fang-an Deng,Man Cui 보안공학연구지원센터(IJSIP) 2014 International Journal of Signal Processing, Image Vol.7 No.6

DNA microarray technique can detect tens of thousands of genes activity in cells and has been widely used in clinical diagnosis. However, microarray data has the characteristics of high dimension and small samples, moreover many irrelevant and redundant genes also decrease performance of classification algorithm. Feature gene selection is an effective method to solve this problem. This paper proposes a hybrid feature gene selection method. Firstly, a lot of irrelevant genes from original data were eliminated by using reliefF algorithm, and the candidate feature genes subset is obtained; Secondly, Fuzzy neighborhood rough set with information entropy which deals directly with continuous data is proposed to reduce redundant genes among genes subset above. Here, differential evolution algorithm is used to optimize radius before reduction by using fuzzy neighborhood rough set, because radius of neighborhood greatly affects reduction performance. The simulation results on six microarray datasets indicate that our method can obtain higher classification accuracy by using as few genes as possible, especially feature genes selected are important for understanding microarray data and identifying the pathogenic genes. The results demonstrated that this method is effective and efficient for feature genes selection.

Serum Uric Acid Relation for Hearing Threshold Shiftt

Hui-Fang Yang,Tung-Wei Kao,Tao-Chun Peng,Yu-Shan Sun,Fang-Yih Liaw,Chung-Ching Wang,Ju-Ting Hsueh,Wei-Liang Chen 대한이비인후과학회 2017 Clinical and Experimental Otorhinolaryngology Vol.10 No.2

Objectives. The effects of serum uric acid (UA) level on a variety of diseases were found from experimental and observational studies via oxidative stress and anti-oxidants. However, research on the association of UA and hearing thresholds is relatively sparse. We investigated this issue in the U.S. general population to evaluate the relationship of serum UA levels and pure tone threshold of hearing. Methods. Forty four thousand eighty four eligible participants aged 20 to 69 years who have serum UA data and received Audiometry Examination Component were enrolled from the National Health and Nutrition Examination Survey 1999–2004. Hearing thresholds (dB) as a pure tone average at low frequencies (0.5, 1, 2 kHz) and at high frequencies (3, 4, 6, and 8 kHz) were computed. Multivariate linear regression models and tertile-based analysis with an extended-model approach for covariates adjustment were used to assess the correlation between serum UA level and hearing thresholds. Results. In the adjusted mode of tertile-based analysis, the regression coefficients elucidated as the change of log-transformed mean hearing thresholds upon comparing participants in the highest tertile of serum UA to those in the lowest tertile were –0.067 (P=0.023) in high frequency and –0.058 (P=0.054) in low frequency. After adjusting for multiple pertinent covariates, inverse association between tertiles of serum UA and hearing thresholds remained essentially unchanged. The negative trends between serum UA and hearing thresholds were statistically significant (P for trends <0.05) in tertile-based multiple linear regressions. Conclusion. Individuals with elevated UA levels independently were found to be inversely associated with hearing thresholds for pure tone audiometry in a nationally representative sample of U.S. adults.

CSR과 반생산적 업무행동 간의 관계에서 도덕적 정체성의 조절효과: 도덕-행동 일치성과 도덕적 허가 현상

방도(Fang, Tao),성상현(Sung, Sanghyeon) 대한경영학회 2021 大韓經營學會誌 Vol.34 No.2

Triptolide Inhibits Proliferation and Induces Apoptosis of Human Melanoma A375 Cells

Tao, Yue,Zhang, Meng-Li,Ma, Peng-Cheng,Sun, Jian-Fang,Zhou, Wu-Qing,Cao, Yu-Ping,Li, Ling-Jun Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.4

Triptolide, a diterpenoid obtained from Tripteryglum wilfordii Hook.f, has attracted interest for its antitumor activities against human tumor cell lines in recent years. This report focuses on anti-proliferative and pro-apoptotic activities in human melanoma A375 cells assessed by CCK8 assay, Hoechst 33258 staining and flow cytometry. In addition, triptolide-induced arrest in the S phase was also observed. Caspase assays showed the apoptosis induced by triptolide was caspase-dependent and probably through intrinsic apoptotic pathways. Furthermore, expression of NF-${\kappa}B$ (p65) and its downstream factors such as Bcl-2, Bcl-$X_L$ was down-regulated. Taken together, the data indicate that triptolide inhibits A375 cells proliferation and induces apoptosis by a caspase-dependent pathway and through a NF-${\kappa}B$-mediated mechanism.

Preclinical Study of Cell Therapy for Osteonecrosis of the Femoral Head with Allogenic Peripheral Blood-Derived Mesenchymal Stem Cells

Tao Zhang,Qiang Fu,Ning-Ning Tang,Qian Zhang,Yi Liu,Jia-Chen Peng,Ning Fang,Li-Mei Yu,Jin-Wei Liu 연세대학교의과대학 2016 Yonsei medical journal Vol.57 No.4

Purpose: To explore the value of transplanting peripheral blood-derived mesenchymal stem cells from allogenic rabbits (rPBMSCs)to treat osteonecrosis of the femoral head (ONFH). Materials and Methods: rPBMSCs were separated/cultured from peripheral blood after granulocyte colony-stimulating factor mobilization. Afterwards, mobilized rPBMSCs from a second passage labeled with PKH26 were transplanted into rabbit ONFH models, which were established by liquid nitrogen freezing, to observe the effect of rPBMSCs on ONFH repair. Then, the mRNA expressions of BMP-2 and PPAR-γ in the femoral head were assessed by RT-PCR. Results: After mobilization, the cultured rPBMSCs expressed mesenchymal markers of CD90, CD44, CD29, and CD105, but failed to express CD45, CD14, and CD34. The colony forming efficiency of mobilized rPBMSCs ranged from 2.8 to 10.8 per million peripheralmononuclear cells. After local transplantation, survival of the engrafted cells reached at least 8 weeks. Therein, BMP-2 was up-regulated, while PPAR-γ mRNA was down-regulated. Additionally, bone density and bone trabeculae tended to increase gradually. Conclusion: We confirmed that local transplantation of rPBMSCs benefits ONFH treatment and that the beneficial effects are relatedto the up-regulation of BMP-2 expression and the down-regulation of PPAR-γ expression.

Whole-genome bisulfite sequencing identified the key role of the Src family tyrosine kinases and related genes in systemic lupus erythematosus

Fang Ting,Liu Suyi,Chen Liying,Ren Yating,Lu Dingqi,Yao Xinyi,Hong Tao,Zhang Xvfeng,Xie Zhimin,Yang Kepeng,Wang Xinchang 한국유전학회 2023 Genes & Genomics Vol.45 No.9

Background As a multisystemic autoimmune illness, the basic mechanisms behind the pathophysiology of systemic lupus erythematosus (SLE) remain poorly understood. Objective We aimed to investigate the possible significance of SLE’s DNA methylation and gain further insight into potential SLE-related biomarkers and therapeutic targets. Methods We used whole genome bisulfite sequencing (WGBS) method to analyze DNA methylation in 4 SLE patients and 4 healthy people. Results 702 differentially methylated regions (DMRs) were identified, and 480 DMR-associated genes were annotated. We found the majority of the DMR-associated elements were enriched in repeat and gene bodies. The top 10 hub genes identified were LCK, FYB, PTK2B, LYN, CTNNB1, MAPK1, GNAQ, PRKCA, ABL1, and CD247. Compared to the control group, LCK and PTK2B had considerably decreased levels of mRNA expression in the SLE group. Receiver operating characteristic (ROC) curve suggested that LCK and PTK2B may be potential candidate biomarkers to predict SLE. Conclusions Our study improved comprehension of the DNA methylation patterns of SLE and identified potential biomarkers and therapeutic targets for SLE.

Compressive Behaviour of Geopolymer Concrete-Filled Steel Columns at Ambient and Elevated Temperatures

Tao, Zhong,Cao, Yi-Fang,Pan, Zhu,Hassan, Md Kamrul Council on Tall Building and Urban Habitat Korea 2018 International journal of high-rise buildings Vol.7 No.4

Geopolymer concrete (GPC), which is recognised as an environmentally friendly alternative to ordinary Portland cement (OPC) concrete, has been reported to possess high fire resistance. However, very limited research has been conducted to investigate the behaviour of geopolymer concrete-filled steel tubular (GCFST) columns at either ambient or elevated temperatures. This paper presents the compressive test results of a total of 15 circular concrete-filled steel tubular (CFST) stub columns, including 5 specimens tested at room temperature, 5 specimens tested at elevated temperatures and the remaining 5 specimens tested for residual strength after exposure to elevated temperatures. The main variables in the test program include: (a) concrete type; (b) concrete strength; and (c) curing condition of geopolymer concrete. The test results demonstrate that GCFST columns have similar ambient temperature behaviour compared with the conventional CFST counterparts. However, GCFST columns exhibit better fire resistance than the conventional CFST columns. Meanwhile, it is found that the GCFST column made with heat cured GPC has lower strength loss than other columns after exposure to elevated temperatures. The research results highlight the possibility of using geopolymer concrete to improve the fire resistance of CFST columns.