Identification and Functional Characterization of Porcine XBP-1 in PEF Cells

Jin-Yu Zhan9,Kyu-Sun Lee,Ji-Su Kim,Kyung-Kwang Lee,Kweon Yu,Deog-Bon Koo 한국동물번식학회 2008 Reproductive & Developmental Biology(Supplement) Vol.32 No.2s

Identification and Functional Characterization of Porcine XBP-1 in PEF Cells

Jin-Yu Zhan9,Kyu-Sun Lee,Ji-Su Kim,Kyung-Kwang Lee,Kweon Yu,Deog-Bon Koo 한국동물생명공학회(구 한국동물번식학회) 2008 Reproductive & developmental biology Vol.32 No.2

Evolutionary Fusion of a Multi-Classifier System for Efficient Face Recognition

Zhan Yu,남미영,이필규,Suman Sedai 제어·로봇·시스템학회 2009 International Journal of Control, Automation, and Vol.7 No.1

In this paper an evolutionary classifier fusion method inspired by biological evolution is presented to optimize the performance of a face recognition system. Initially, different illumination environments are modeled as multiple contexts using unsupervised learning and then the optimized classifier ensemble is searched for each context using a Genetic Algorithm (GA). For each context, multiple optimized classifiers are searched; each of which are referred to as a context based classifier. An evolutionary framework comprised of a combination of these classifiers is then applied to optimize face recognition as a whole. Evolutionary classifier fusion is compared with the simple adaptive system. Experiments are carried out using the Inha database and FERET database. Experimental results show that the proposed evolutionary classifier fusion method gives superior performance over other methods without using evolutionary fusion.

A QoE Evaluation Method for RT-HDMV Based on Multipath Relay Service

Yu-Zhuo Zhan,Wei-Min Lei,Yun-Chong Guan 한국통신학회 2019 한국통신학회 학술대회논문집 Vol.2019 No.1

In the paper, a multipath relay service based on QoE (Quality of Experience) evaluation method is proposed for RT-HDMV (Real-Time High Definition Medical Video). The method eliminates several of the limitations in the existing methods for the conventional single-path transmission. It can fully utilize the finite network resources and transmission bandwidth to meet the users’ demands of RT-HDMV to get the better score of QoE. We use a three-stage framework to evaluate the QoE: construct the multipath relay transmission for RT-HDMV, design the load distribution strategy by the mapping between QoS (Quality of Service) and QoE and coupling the multipath scene, and redefine the rule of QoE evaluation. The experiments show that our framework can provide better QoE guarantees for RT-HDMV than existing methods in traditional single-channel transmission scenarios.

Comparative Study on the Supramolecular Nanocarriers Derived from the Assembly of Gemini and Conventional Surfactants onto Hyperbranched Polyethylenimine

Zhan-Long Yu,Fa Cheng,Shao-Jing Zhao,Jian-Wei Zhang,Zu-Cheng Cai,Yu Chen 한국고분자학회 2011 Macromolecular Research Vol.19 No.2

Conventional surfactant dodecylbenzenesulfonic acid (DBSA) and its corresponding Gemini surfactant acid (GSA) were simply mixed with a solution of hyperbranched polyethylenimine (HPEI) in chloroform. This resulted in the novel supramolecular complexes, HPEI-DBSA and HPEI-GSA, through a neutralization reaction between the amino groups of HPEI and the sulfonic-acid groups of DBSA and GSA. The formed supramolecular complexes and their precursors were characterized by FTIR, 1H NMR, and dynamic light scattering. HPEI-DBSA and HPEI-GSA exhibited inverted-micelle properties that could accommodate the water-soluble guest molecules in an apolar solvent. With the anionic dye methyl orange (MO) as the model guest, both HPEI-DBSA and HPEI-GSA showed superior guest-encapsulation performance than the supramolecular nanocarrier derived from the assembly of aliphatic acid onto HPEI. For example, HPEI-DBSA and HPEI-GSA nanocarriers could encapsulate more MO molecules, and a much smaller amount of the surfactant molecules was required to achieve the maximum MO encapsulation. These results highlight the importance of strong-acid groups of the surfactants in raising the guest-encapsulation efficiency of this type of supramolecular nanocarrier. HPEI-DBSA and HPEI-GSA had different guestencapsulation mechanisms. This indicates that HPEI-GSA can encapsulate basic guests more than HPEI-DBSA,such as MO and fluorescein sodium (FS), but fewer relatively acidic guests, such as Alizarin Yellow R sodium salt and bromophenol blue.

TAZ as a novel regulator of oxidative damage in decidualization via Nrf2/ARE/Foxo1 pathway

Yu Hai-Fan,Zheng Lian-Wen,Yang Zhan-Qing,Wang Yu-Si,Wang Ting-Ting,Yue Zhan-Peng,Guo Bin 생화학분자생물학회 2021 Experimental and molecular medicine Vol.53 No.-

TAZ, as a crucial effector of Hippo pathway, is required for spermatogenesis and fertilization, but little is known regarding its physiological function in uterine decidualization. In this study, we showed that TAZ was localized in the decidua, where it promoted stromal cell proliferation followed by accelerated G1/S phase transition via Ccnd3 and Cdk4 and induced the expression or activity of stromal differentiation markers Prl8a2, Prl3c1 and ALP, indicating the importance of TAZ in decidualization. Knockdown of TAZ impeded HB-EGF induction of stromal cell proliferation and differentiation. Under oxidative stress, TAZ protected stromal differentiation against oxidative damage by reducing intracellular ROS and enhancing cellular antioxidant capacity dependent on the Nrf2/ARE/Foxo1 pathway. TAZ strengthened the transcriptional activity of Nrf2 which directly bound to the antioxidant response element (ARE) of Foxo1 promoter region. Additionally, silencing TAZ caused accumulation of intracellular ROS through heightening NOX activity whose blockade by APO reversed the disruption in stromal differentiation. Further analysis revealed that TAZ might restore mitochondrial function, as indicated by the increase in ATP level, mtDNA copy number and mitochondrial membrane potential with the reduction in mitochondrial superoxide. Additionally, TAZ modulated the activities of mitochondrial respiratory chain complexes I and III whose suppression by ROT and AA resulted in the inability of TAZ to defend against oxidative damage to stromal differentiation. Moreover, TAZ prevented stromal cell apoptosis by upregulating Bcl2 expression and inhibiting Casp3 activity and Bax expression. In summary, TAZ might mediate HB-EGF function in uterine decidualization through Ccnd3 and ameliorate oxidative damage to stromal cell differentiation via Nrf2/ARE/Foxo1 pathway.

Excessive retinoic acid inhibit mouse embryonic palate mesenchymal cell growth through involvement of Smad signaling

Zengli Yu,Xiaozhuan Liu,Zhan Gao,Zhitao Li,Jun Yin,Yuchang Tao,Lingling Cui,Zengli Yu 한국통합생물학회 2017 Animal cells and systems Vol.21 No.1

All-trans retinoic acid (atRA), the oxidative metabolite of retinoic acid (RA), is essential for palatogenesis. Overdose RA is capable of inducing cleft palate in mice and humans. Normal embryonic palatal mesenchymal (EPM) cell growth is crucial for shelf growth. Smad signaling is involved in many biological processes. However, it is not much clear if atRA could affect Smad signaling during EPM cells growth. In this study, the timed pregnant mice with maternal administration of 100 mg/kg body weight of RA by gastric intubation were cervical dislocation executed to evaluate growth changes of palatal shelves by hematoxylin and eosin (H&E) staining. At the same time, a primary mouse EPM (MEPM) cell culture model was also established. MEPM cells were treated with atRA (0.1, 0.5, 1, 5 and 10 μM) for 24, 48 and 72 h. The results indicated that the sizes of the shelves were smaller than those in control. AtRA inhibited MEPM cell growth with both increasing concentration and increasing incubation time, especially at 72 h in vitro. Moreover, atRA significantly increased the mRNA and protein expression levels of Smad7 (P < .05), but the mRNA and protein expression levels of PCNA were reduced (P < .05). We also found atRA inhibited phosphorylation of Smad2 compared with untreated group (P < .05). However, the protein and mRNA levels of Smad2 did not change both in atRA-treated and untreated group (P > .05). We demonstrated that RA induced inhibition of MEPM cell growth that could cause cleft palate partly by down-regulation of Smad pathway.

Mitigating SYN flooding Attack and ARP Spoofing in SDN Data Plane

Ting-Yu Lin,Jhen-Ping Wu,Pei-Hsuan Hung,Ching-Hsuan Shao,Yu-Ting Wang,Yun-Zhan Cai,Meng-Hsun Tsai 한국통신학회 2020 한국통신학회 APNOMS Vol.2020 No.09

As the number of network devices increases rapidly, it becomes more and more difficult to defend network attacks. Large-scaled attacks, such as SYN flooding, may lead to heavy burden to the switches as well as the controller in a software defined network (SDN). In this paper, we investigate the SYN flooding and Address Resolution Protocol (ARP) spoofing attacks in SDN, and then propose mechanisms to address these two attacks. We also present a new scheme to detect SYN flooding by using only a few forwarding rules. Moreover, we utilize the Programming Protocol-independent Packet Processors (P4) technique to mitigate the burden of the controller.

Potential roles of two Cathepsin genes, DcCath-L and DcCath-O in the innate immune response of Diaphorina citri

Hai-Zhong Yu a,Yu-Ling Huang,Ning-Yan Li,Yan-Xin Xie,Cheng-Hua Zhou,Zhan-Jun Lu 한국응용곤충학회 2019 Journal of Asia-Pacific Entomology Vol.22 No.4

Cathepsins belong to a group of mammalian papain-like cysteine proteases that play an important role in the insect immune response. In the present study, we identified two cathepsin genes from the Diaphorina citri genome database, cathepsin-L (DcCath-L) and cathepsin-O (DcCath-O). DcCath-L encodes a DcCath-L protein consisting of 348 amino acid residues, and DcCath-O encodes a DcCath-O protein consisting of 329 amino acid residues. DcCaths contain two conserved domains, the Inhibitor_I29 and Pept_C1 domains. Phylogenetic tree analysis revealed that DcCath-L and DcCath-O were divided into two different groups: Cathepsin-L and Cathepsin-O. Reverse transcription quantitative polymerase chain reaction analysis showed that both DcCath-O and DCCath-L were highly expressed in the midgut, while lower expression was observed in other tissues. Developmental stage expression analysis suggested that DcCath-O was mainly expressed in third instar nymph and adult, and DcCath-L was highly expressed in first and fourth instar nymph. Following exposure to two different heat-killed bacteria (Escherichia coli and Staphylococcus aureus) and Candidatus Liberibacter asiaticus, the expression of DcCath-O and DcCath-L was significantly increased and showed differential expression patterns at different time points. In addition, silencing of DcCath-L obvious affected the gene expression of members of the Toll pathway, while knock down of DcCath-L has no significantly influence. Overall, these data provide valuable information for further functional studies of D. citri cathepsins.

Security Analysis of Speech Perceptual Hashing Authentication Algorithm

Zhang Qiu-yu,Ren Zhan-wei,Xing Peng-fei,Huang Yi-bo,Yu Shuang 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.1

Speech perceptual hashing authentication algorithm is an efficient method for content integrity authentication and identity authentication. But the algorithm becomes transparent under the principle of Kerckhoffs which makes the algorithm unsafe. In this paper, the algorithm is encrypted under the principle of Kerckhoffs to protect the security of the algorithm. Then the specific link that won’t affect the performance of the algorithm is identified through the experiments. Next, this paper analyzes the security of the encrypted algorithm based on the concept of Shannon unicity distance. The unicity distance is figured out finally based on the experiments. That is to say, the algorithm loses its security even though the algorithm has been encrypted. Under this circumstances, the most important thing is to continue keeping the safety of the algorithm. Therefore, this paper proposed an efficient random secret key method to guarantee the safety of the algorithm after the unicity distance is figured out.