JOURNAL OF FLUORESCENCE
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2025
·
IF 3.1
Pei Shuchen,Cai Shaoyu,Yan Kangli,Zhou Jinjing,Luo Kang,Chen Xinan
In this study, a simple and efficient method for synthesizing nitrogen-doped carbon quantum dots (N-CQDs) has been developed through a one-step hydrothermal process using hedyotis diffusa willd. The morphology, chemical composition, and optical properties of the resulting N-CQDs were thoroughly characterized. The synthesized N-CQDs exhibited a spherical shape with an average particle size of 4.32 nm, and the crystal lattice spacing was determined to be 0.17 nm. Notably, the N-CQDs demonstrated a significant fluorescence quenching effect in the presence of Fe 3 ⁺ ions, exhibiting high selectivity and sensitivity. The detection limit for Fe 3 ⁺ ions was found to be 6.62 × 10⁻ 3 μmol/L within a linear range of 0.01–0.1 μmol/L. Furthermore, the N-CQDs displayed significant antimicrobial activity against both Gram-positive ( Staphylococcus aureus ) and Gram-negative ( Escherichia coli ) bacteria, with minimum inhibitory concentration (MIC) values of 0.055 mg/mL and 0.038 mg/mL, respectively. These findings suggest that the N-CQDs can serve as an effective fluorescent sensor and a promising antibacterial agent. This work provides a new strategy for the preparation of N-CQDs from natural plant sources, highlighting their potential applications as both fluorescent sensors and antimicrobial agents.
研究领域:
材料科学
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生物医学
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环境科学
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.1
Jie-Ping Fan,Ming-Ru Xie,Li-Peng Zhong,Yi-Jun Cao,Ping Gan,Hui-Ping Chen,Hai-Long Peng,Chun-Fang Xie
Developing candidates from medicinal plants for snakebite treatment is quite promising but still remains challenging. The widespread snake venom phospholipase A 2 (svPLA 2 ) is considered as an important therapeutic target for treating snakebite envenomation. In this study, a ligand fishing based platform was established following the immobilization of svPLA 2 onto Fe 3 O 4 magnetic nanoparticles for the first time. After investigating the enzymatic properties and verifying the ligand fishing efficacy, the developed platform was applied to screen svPLA 2 inhibitors from Hedyotis diffusa Willd . and Paris polyphylla . Three compounds (chlorogenic acid, caffeic acid, 2-hydroxycinnamic acid) from Hedyotis diffusa Willd . aqueous extracts and four compounds (rutin, cynaroside, kaempferol, 2-hydroxycinnamic acid) from Paris polyphylla aqueous extracts were screened and identified as potential inhibitors by coupling with UPLC-Q-TOF/MS. Their inhibitory activity was verified through an enzymatic inhibition assay, and their interaction with svPLA 2 enzyme was confirmed by molecular docking. The results demonstrated the developed platform was feasible for the rapid and accurate screening of svPLA 2 inhibitors from medicinal plant extracts. This study provides a strategy for the future development of next-generation antivenom treatments.
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DOI
高影响因子
Journal of Ovarian Research
·
2024
·Vol. 17
·期 1
·1-17
·
IF 3.8
Sui Xue,Gao Bingqing,Zhang Liu,Wang Yanmin,Ma Junnan,Wu Xingchen,Zhou Chenyu,Liu Min,Zhang Lin
Background Cisplatin (DDP) is one of the most effective anticancer drugs, commonly used to treat advanced ovarian cancer (OC). However, DDP has significant limitations of platinum-based drugs, including chemical resistance and high-dose toxic side effects. Traditional Chinese medicines (TCMs) often presented in the form of formula, in which the herb pair was the basic unit. Scutellaria barbata D.Don and Hedyotis diffusa Willd (SB-HD) are famous TCMs herb pair that have been shown to help treat multiple types of cancers. However, the synergistic effects and mechanism of combination of SB-HD and DDP to enhance DDP chemosensitivity in OC are still unknown.Results In vitro, we found that the optimal proportion of SB-HD to inhibit the proliferation of OC cells was 2:1, SB-HD and DDP were shown to synergistically reduce the viability of OC cells, inhibit the colony formation, promote cell cycle arrest and apoptosis, as well as inhibit cell migration and invasion. In vivo, combination treatment significantly inhibited the growth of subcutaneous tumors in BALB/c nude mice and reduced the toxic side effects of DDP. Mechanistically, SB-HD and DDP combination treatment significantly promoted oxidative stress response, decreased MMP, inhibited ATP production, decreased ROS levels and increased SOD activity, increased the expression of NRF2, HO-1, ATG5 and LC3, decreased the expression of p62 and FTH1 both in OC cells and tumor tissue of mice. Inhibitor 3-MA (Methyladenine, autophagy inhibitor) and Fer-1 (Ferrostatin-1, iron ion inhibitor) can effectively reverse the expression changes of the key target proteins, but not ZnPP (Zinc protoporphyrin, HO-1 inhibitor). Through bioinformatics analysis, it was found that the abnormal expression level of NRF2 and FTH1 mRNA has a high prognostic value, at the same time, the other four key proteins respectively or interacting with NRF2 and FTH1, also play important roles in the occurrence and development of OC.Conclusion Our findings uncover a synergistic effect of SB-HD and DDP against OC through modulating oxidative stress via NRF2-FTH1 autophagic degradation pathway, which may provide an important theoretical foundation for the use of SB-HD and a new strategy for enhancing DDP chemosensitivity as well as reducing toxic side effects.
研究领域:
肿瘤学
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药理学
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传统中药学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）