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Long Gui-yun,Wang Zhao,Yang Jia-peng,Tang Chen-hong,Jin Dao-Chao,Yang Hong,Zhou Cao,Yang Xi-bin 한국응용곤충학회 2023 Journal of Asia-Pacific Entomology Vol.26 No.3
Insect neuropeptides are involved in many important developmental processes. Here, we cloned three neuro peptide genes (SfEH, SfETH, and SfCCAP) from Sogatella furcifera (Horváth) and analyzed the relative expression levels of these genes through Real-time Quantitative polymerase chain reaction (RT-qPCR) during different developmental stages and in different wing types of S. furcifera following exposure to sublethal concentrations (LC 10 and LC 25 ) of methylaminoavermectin benzoate. The results revealed that the three neuropeptide genes (SfEH, SfETH, and SfCCAP) of S. furcifera contained open reading frame sequences of 222, 636, and 408 bp, encoding 73, 211, and 135 amino acids, respectively. Moreover, the expression of SfEH and SfETH reached its peak on day 3 of the 5 th instar nymph stage, while the SfCCAP expressed pinnacle on 40 min after eclosion. Furthermore, the relative expression levels of the three genes were in the following order: SfEH, short-winged female > long-winged female > long-winged male; SfETH, long-winged female > short-winged female > longwinged male; and SfCCAP, short-winged female > long-winged male > short-winged female. Upon calculating the relative expression of the three peptide genes after 24 and 48 h of treatment with sublethal concentrations of methylaminoavermectin benzoate, it was found that the relative mRNA expression levels of SfEH and SfETH declined upon LC 10 treatment but increased upon LC 25 treatment. Meanwhile, the relative mRNA expression level of SfCCAP declined upon both LC 10 and LC 25 treatments. This result will help us understand the effects of pesticides on insect growth and development at the molecular level.
Zhao Wang,Cao Zhou,Gui-yun Long,Hong Yang,Dao-chao Jin 한국응용곤충학회 2018 Journal of Asia-Pacific Entomology Vol.21 No.2
The white-backed planthopper, Sogatella furcifera (Horváth) (Hemiptera: Delphacidae), is a major rice pest in some Asia-Pacific countries. Buprofezin is an insect growth regulator with relatively low mammalian toxicity but high efficacy to many rice pests. In this study, we estimated the toxicity of buprofezin against 3rd-instar nymphs of S. furcifera using the rice-stem dipping method. The results showed that the LC50 of buprofezin to 3rd-instar nymphs were 0.89 mg/L. When 3rd-instar nymphs were exposed to the LC10 and LC25 (0.10 and 0.28 mg/L) of buprofezin, the duration of juvenile development was significantly prolonged in the F0 and F1 generations. The fecundity (eggs per female) of the F1 females was reduced by 5.29% and 12.34%, respectively, in addition to the survival rate, emergence rate, copulation rate, and hatchability were decreased by treatment with buprofezin at LC10 and LC25, compared with the control group. The relative fitness of S. furcifera in LC10 and LC25 treatments was reduced by 47% and 63%, respectively. Furthermore, real-time quantitative PCR analyses revealed increased the expressions of SfCHS1 and its two variants following the exposure of nymphs to buprofezin. Increased these genes mRNA levels associated with reduced chitin biosynthesis may result from the inhibition of chitin synthase activity, and thereby leading to a higher mortality of S. furcifera. Overall, sublethal concentrations of buprofezin suppressed the population growth of S. furcifera.
Chen, Qiang,Luo, Zhao-Yun,Lin, Min,Lin, Qi-Li,Chen, Chan-Yu,Yang, Chun,Xie, Long-Xu,Li, Hui,Zheng, Jia-Kun,Yang, Li-Ye,Ju, Gui-Zhi Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.4
Background: Human papillomavirus (HPV) infection is the main cause of cervical cancer. Limited epidemiologic data of HPV prevalence are available for women attending hospitals in southern China. This study aimed to evaluate the profiles of HPV infection and cytology status in gynecological outpatients in Chaozhou City. Methods: A total of 2833 eligible women were enrolled. The HPV GenoArray test was used for HPV detection and genotyping. Nearly one half of the HPV positive women received liquid-based cytology test. Logistic regression analysis was performed to assess the predictable effects of age and genotype for categories of abnormal cytology. Results: The prevalence of overall, high-risk, and low-risk HPV infection were 24.5%, 19.5% and 8.4%, respectively. A U-shaped age-specific prevalence curve was observed in overall HPV and high-risk HPV, but not in low-risk HPV, which declined with age increasing. The 6 most common high-risk HPV type in descending order, were types 52, 16, 58, 18, 68, and 33. Age and HPV genotype were both important determinants of abnormal cytology incidence, the older women (>45 years) and those infected with HPV type 16 and/or 18 having the highest risk for abnormal cytology. Conclusion: Our findings support the hypothesis that second-generation HPV prophylactic vaccines including HPV-52 and -58 may offer higher protection for women residing in Chaozhou and neighboring cities in Guangdong.
Recent advances in the food application of electrospun nanofibers
Wei-Hua Han,Xiao Li,Gui-Feng Yu,Bin-Chang Wang,Lin-Peng Huang,Jingkai Wang,Yun-Ze Long 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.110 No.-
Electrospinning (e-spinning) has excellent advantages in producing functional and versatile nanofibersand electrospun (e-spun) nanofibers have a variety of potential applications, including in food industry. This paper reviews the recent progress of e-spinning and food-related e-spun nanofibers, covering ediblenanofibers (natural materials and food ingredients), active food packaging (antibacterial packaging,antioxidant packaging, high temperature and humidity resistant packaging), food filtration membranes,and food sensors. Additionally, we discussed the new trend of combining nanomaterials with food andthe challenges of applying e-spinning in food science. The results indicated that e-spinning is a promisingand efficient alternative for the production of daily and functional food.
김의검,이지현,신귀남,조수현,김룡국,이지숙,박용진,윤치영,송규용 충남대학교 약학대학 의약품개발연구소 2008 藥學論文集 Vol.23 No.-
The purpose of this study was to investigate the effects of crude saponin fraction of black ginseng(SFBG) on atopic dermatitis in vitro. The house dust mite(Dermatophagoides pteronissinus, DP) plays a key role in the pathogenesis of allergic diseases, including atopic dermatitis and asthma. Monocyte chemo-attractant protein 1(MCP-1/CCL2)/interleukin-6(IL-6)/IL-8(CXCL8) plays a pivotal role in mediating the infiltration of various cells into the skin of atopic dermatitis. We found that SFBG potently suppressed the elevated production of MCP-1, IL-6 and IL-8 induced by D. pteronissinus extract(DpE) treatment in the human monocytic cell line, THP-1 cells. Also, SFBG potently suppressed the elevated production of IL-6 and IL-8 induced by DpE treatment in the human eosinophilic cell line, EoL-1 cells. These results suggest that SFBG have an anti-atopic property, and that in future further development of main effective constituents in SFBG can provide a novel therapeutic agent for atopic dermatitis.
Gal, Yeong-Soon,Jin, Sung-Ho,Gui, Tai-Long,Lee, Won-Chul,Yun, Nam-Gyun,Park, Seong-Ha,Lee, Sang-Seob,Bae, Jang-Soon 한국공업화학회 2005 Journal of Industrial and Engineering Chemistry Vol.11 No.3
A new conjugated ionic cyclopolymer having a bulky tetraphenylborate counter ion, poly (2-ethynyl-N-propargylpyridinium tetraphenylborate), was synthesized via ring- forming polymerization of the corresponding diacetylenic monomer. The polymerization of 2-ethynyl-N-propargylpyridinium tetraphenylborate was performed using various transition metal catalysts. In general, the polymerization of this diacetylenic monomer proceeded well to give a high yield of polymer. The catalytic activities of a W-based catalyst were similar with those of Mo-based catalysts. The resulting polymers were mostly brown or black powders. The polymer structure was characterized through elemental analysis and NMR, 1R, and UV-visible spectroscopies to confirm the conjugated cyclopolymer structure and its tetraphenylborate counter ions. The inherent viscosities of the resulting polymers were in the range 0.09~0.16 dL/g, depending on the polymerization conditions. The thermal and morphological properties of the polymers were also studied and are discussed.
Cao Zhou,Lei-lei Liu,Hong Yang,Zhao Wang,Gui-yun Long,Dao-chao Jin 한국응용곤충학회 2017 Journal of Asia-Pacific Entomology Vol.20 No.3
Sogatella furcifera (Horváth) (white-backed planthopper, WBPH) is one of the most important pests on rice in Asia. It seriously impacts rice production by sucking phloem from the rice plant and transmitting southern rice black-streaked dwarf virus (SRBSDV). In the current study, we examined the sublethal effects of imidacloprid on the development, reproduction, and susceptibility of S. furcifera in the laboratory using the rice stem dipping method. The results showed that exposure of third-instar S. furcifera nymphs to sublethal concentrations (LC10 and LC25) of imidacloprid inhibited the rate of nymphal development in the F0 and F1 generations, and there was a significant difference between the LC25 treated group and the control group. The fecundity (eggs per female) of the F1 generation showed significant declines of 22.05% and 38.56% following exposure to LC10 and LC25, respectively compared with the control group. Emergence rate, copulation rate, and hatchability were significantly lower in the LC25-treated group. The relative fitness of S. furcifera treated with LC10 and LC25 imidacloprid was 0.46 and 0.22, respectively. These results showed that exposure to imidacloprid impacted the next generation of S. furcifera, thus affecting the population growth of this species. After third-instar S. furcifera nymphs were exposed to sublethal concentrations of imidacloprid LC10 and LC25, S. furcifera showed reduced susceptibility to treatment with thiamethoxam and buprofezin. Although the susceptibility of S. furcifera to chlorpyrifos was decreased after the exposure of third-instar nymphs to imidacloprid LC25, S. furcifera populations that had been exposed to imidacloprid LC10 showed enhanced susceptibility to chlorpyrifos. These results provided a reference point for the application of insecticides to control S. furcifera.
Hong Yang,Cao Zhou,Dao-chao Jin,Ming-fu Gong,Zhao Wang,Gui-yun Long 한국응용곤충학회 2019 Journal of Asia-Pacific Entomology Vol.22 No.4
The brown planthopper Nilaparvata lugens negatively affects rice yield by sucking nutrients from the rice stem and spreading viruses. In this study, the effects of sublethal concentrations of abamectin on development, fecundity, and wing morphs of N. lugens were investigated. Treatment with sublethal concentrations of abamectin showed no significant effects on the developmental period of F 0 nymphs. Although LC 10 and LC 25 treatments resulted in 10% and 25% mortality, the LC 25 treatment significantly prolonged the lifespan of macropterous and brachypterous females. Abamectin-treated brachypterous females showed significantly lower fecundity than control females. Furthermore, abamectin treatment showed no significant effects on the developmental period of F 1 nymphs. However, LC 25 treatment significantly inhibited the fecundity of brachypterous F 1 females and significantly reduced the proportion of macropterous F 1 females and brachypterous F 1 males. LC 25 treatment showed no significant effects on the fecundity of macropterous F 1 females. Considering the proportion of macropterous and brachypterous F 1 females, the relative fitness of the macropterous F 1 nymphs in the control, LC 10 , and LC 25 treatment groups was 1, 1.02, and 0.84, respectively, and that of brachypterous F 1 nymphs was 1, 0.79, and 0.93, respectively. Sublethal concentrations of abamectin inhibited N. lugens emergence. The present findings indicate the potential of abamectin for N. lugens field control.
Han Ying-Hao,Chen Dong-Qin,Jin Mei-Hua,Jin Ying-Hua,Li Jing,Shen Gui-Nan,Li Wei-Long,Gong Yi-Xi,Mao Ying-Ying,Xie Dan-Ping,Lee Dong-Seok,Yu Li-Yun,Kim Sun-Uk,김지수,권태호,Cui Yu-Dong,Sun Hu-Nan 한국응용생명화학회 2020 Applied Biological Chemistry (Appl Biol Chem) Vol.63 No.3
Severe inflammatory reactions caused by macrophage activation can trigger a systemic immune response. In the present study, we observed the anti-inflammatory properties of hispidin on LPS induced RAW264.7 macrophage cells. Our results showed that hispidin treatment significantly reduced the production of cellular NO, IL-6 and reactive oxygen species (ROS) while has not inhibitory effect on TNF-α productions. Excitingly, hispidin treatment retains the phagocytosis ability of macrophages which enabling them to perform the function of removing foreign invaders. Signaling studies showed, hispidin treatment dramatic suppressed the LPS induced mitogen activated protein kinases (MAPK) and JAK/STAT activations. In conclusion, our findings suggest that hispidin may be a new therapeutic target for clinical treatment of macrophages-mediated inflammatory responses.