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| 1 | Revisiting the role of delta-1-pyrroline-5-carboxylate synthetase in drought-tolerant crop breeding显示文摘The delta-1-pyrroline-5-carboxylate synthetase(P5CS)gene exercises a protective function in stressed plants.However,the relationship between proline accumulation caused by P5CS and abiotic stress tolerance in plants is not always clear,as P5CS overexpression has been reported to repress plant growth under normal conditions in several reports.We re-evaluated the role of P5CS in drought-tolerant rice breeding by expressing the AtP5CS1 and feedback-inhibition-removed AtP5CS1(AtP5CS1^(F128A))genes under the regulation of an ABA-inducible promoter to avoid the potential side effects of P5CS overexpression under normal conditions.ABA-inducible AtP5CS1 and AtP5CS1^(F128A) increased seedling growth in a nutrient solution(under osmotic stress)and grain yield in pot plants.However,the evidently deleterious effects of AtP5CS1 on grain quality,tiller number,and grain yield in the field indicated the unsuitability of P5CS for drought-tolerance breeding. | Xuanjun Feng Yue Hu Weixiao Zhang Rongqian Xie Huarui Guan Hao Xiong Li Jia Xuemei Zhang Hanmei Zhou Dan Zheng Ying Wen Qingjun Wang Fengkai Wu Jie Xu Yanli Lu | 2022 | The Crop Journal2022，10，4： | 2 |
| 2 | HARMONIC MIXING EXPERIMENTS BETWEEN OPTICALLY PUMPED CH2F2 LASER AND MICROWAVE RADIATIONS显示文摘We have been observed the frequency difference signal between higher order harmonic of 4 mm microwave oscillating source and CH2F2 FIR laser.In three experiments,the frequencies of Gunn oscillators are 93.16 GHz,73.54 GHz and 73.9 GHz,and their harmonic orders are 15th,19th amd 22th,the laser frequency are 1.397 THz(former twin)and 1.626 THz(latter one),and frequency difference signal-noise ratio are better than 20dB. | Yan Hanmei,Xin Mingde and Shen Naicheng(National Institute of Metrology,Beijing,China)Zhou Baoqing,Gu Xuchang,Chen Jufen and Bai Lingxian(Shanghai Institute of Technical Physics) | 1991 | 计量学报1991，12，S1： | 0 |
| 3 | Dual-responsive supramolecular photodynamic nanomedicine with activatable immunomodulation for enhanced antitumor therapy显示文摘A major challenge facing photodynamic therapy(PDT) is that the activity of the immuneinduced infiltrating CD8^(+)T cells is subject to the regulatory T lymphocytes(Tregs), leaving the tumor at risk of recurrence and metastasis after the initial ablation. To augment the antitumor response and reprogram the immunosuppressive tumor microenvironment(TME), a supramolecular photodynamic nanoparticle(DACss) is constructed by the host-guest interaction between demethylcantharidin-conjugated β-cyclodextrin(DMC-CD) and amantadine-terminated disulfide-conjugated FFVLGGGC peptide with chlorin e6 decoration(Ad-ss-pep-Ce6) to achieve intelligent delivery of photosensitizer and immunomodulator for breast cancer treatment. The acid-labile β-carboxamide bond of DMC-CD is hydrolyzed in response to the acidic TME, resulting in the localized release of DMC and subsequent inhibition of Tregs.The guest molecule Ad-ss-pep-Ce6 can be cleaved by a high level of intracellular GSH, reducing photosensitizer toxicity and increasing photosensitizer retention in the tumor. With a significant increase in the CTL/Treg ratio, the combination of Ce6-based PDT and DMC-mediated immunomodulation adequately achieved spatiotemporal regulation and remodeling of the TME, as well as improved primary tumor and in situ lung metastasis suppression with the aid of PD-1 antibody. | Siqin He Lulu Wang Dongxu Wu Fan Tong Huan Zhao Hanmei Li Tao Gong Huile Gao Yang Zhou | 2024 | Acta Pharmaceutica Sinica B2024，14，2： | 0 |
| 4 | Generation of Hepatitis B virus PreS2-S antigen in Hansenula polymorpha显示文摘Despite the long availability of a traditional prophylactic vaccine containing the HBV surface antigen(HBsA g) and aluminum adjuvant, nearly 10% of the population remains unable to generate an effective immune response. Previous studies have indicated that hepatitis B virus(HBV) PreS 2-S is abundant in T/B cell epitopes, which induces a stronger immune response than HBsA g, particularly in terms of cytotoxic T lymphocyte(CTL) reaction. In the current study, the HBV PreS 2-S gene encoding an extra26 amino acids(PreS 2 C-terminus) located at the N-terminus of HBsA g was cloned into the pV CH1300 expression vector. Pre S2-S expressed in the methylotrophic yeast, Hansenula polymorpha, was produced at a yield of up to 250 mg/L. Subsequent purification steps involved hydrophobic adsorption to colloidal silica, ion-exchange chromatography and density ultracentrifugation. The final product was obtained with a total yield of ~15% and purity of ~99%. In keeping with previous studies, ~22 nm viruslike particles were detected using electron microscopy. The generated PreS 2-S antigen will be further studied for efficacy and safty in animals. | Xiaowei Xu Sulin Ren Xiaoxiao Chen Jun Ge Zhenxing Xu Hongying Huang Honglin Sun Yue Gu Tong Zhou Jianqiang Li Hanmei Xu | 2014 | Virologica Sinica2014，29，6： | 0 |
| 5 | Preliminary Study on HPLC Fingerprint of Thlaspi arvense L.显示文摘[Objectives] To establish Thlaspi arvense L. HPLC fingerprints,to provide reference for quality evaluation Thlaspi arvense L.[Methods]HPLC chromatography was used,HPLC column Acclaim~ 120C_(18)( 250 mm × 3. 0 mm,5 μm),mobile phase of acetonitrile-0. 2% phosphoric acid aqueous solution gradient elution,flow rate of 0. 7 m L/min,column temperature of 30 ℃,detection wavelength of 320nm; the chromatographic fingerprint similarity evaluation software( Version 2004 A) was used for similarity evaluation and data processing on 10 origin Thlaspi arvense L. spectra,and the median method was used to generate control Thlaspi arvense L. fingerprint. [Results] The similarity of 10 origin Thlaspi arvense L. spectra was greater than 0. 90,19 common peaks were separated from different origin Thlaspi arvense L. and isovitexin,apigenin,luteolin and acacetin were identified. [Conclusions] The established HPLC fingerprint contained a lot of information and showed good specificity for Thlaspi arvense L.,which can provide a scientific basis for Thlaspi arvense L. quality evaluation system. | Jiamin MENG Hanmei JIANG Jinqing LU Kun ZHOU Yushuo XIAO | 2017 | Medicinal Plant2017，8，4： | 0 |
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