Cu<sub>2</sub>S@Sodium 3-(benzothiazol-2-ylthio)-1-propanesulfonate 复合材料的协同抑菌性能

汪艳; 张强; 陈惠惠; 邱莹; 胡瑞玲; 李亚鹏; 赵欣鑫; 安雪; 刘荟芝; 郭少波

Cu₂S@Sodium 3-(benzothiazol-2-ylthio)-1-propanesulfonate 复合材料的协同抑菌性能

1.
陕西理工大学化学与环境科学学院, 陕西汉中 723000
2.
陕西理工大学生物科学与工程学院, 陕西汉中 723000

基金项目: 陕西省教育厅项目(20JS015)，陕西省自然科学基金(2023-YBGY-486)和陕西理工大学基础研究基金(SLGRCQD2309)

详细信息

通讯作者:
张强，教授，硕士生导师，研究方向为多环芳烃的合成，　E-mail: zhangqiang22@126.com

中图分类号: O626;TB333
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- 被引次数: 0
出版历程
- 收稿日期: 2024-02-28
- 修回日期: 2024-04-03
- 录用日期: 2024-04-20
- 网络出版日期: 2024-05-25

Synergistic antibacterial properties of Cu₂S@Sodium 3-(benzothiazol-2-ylthio)-1-propanesulfonate composites

1.
School of Chemistry and Environmental Science, Shaanxi University of Technology, Hanzhong 723000, China
2.
School of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong 723000, China

Funds: Project of Shaanxi Provincial Department of Education (20JS015), Shaanxi Provincial Natural Science Foundation (2023-YBGY-486), and Fundamental Research Fund of Shaanxi University of Science and Technology (SLGRCQD2309)

摘要

摘要: 随着耐药细菌的快速增长，有机抑菌剂已无法满足社会公共卫生需求，高活性复合抑菌剂不仅可以保留单组分的性质，还可以显示出更加优异的抑菌性能，因而成为抑菌材料的重要研究方向。本研究通过制备纳米Cu₂S材料，然后与3-(苯并噻唑-2-巯基)丙烷磺酸钠反应，制备出结构新颖的Cu₂S@Sodium 3-(benzothiazol-2-ylthio)-1-propanesulfonate(Cu₂S@SBPF)材料，采用透射电子显微镜(TEM)、X射线衍射仪(XRD)、紫外可见分光光度计(UV-vis)、傅里叶变换红外光谱仪(FT-IR)及X射线光电子能谱分析仪(XPS)等测试手段对样品的微观形貌、结构、元素组成等进行表征，探究了该复合材料对革兰氏阴性菌大肠杆菌(E. coli)、革兰氏阳性菌金黄色葡萄球菌(S. aureus)和耐药菌沙门氏菌(T-Salmonella)的抑菌性能。结果表明，浓度为500 µg/mL的复合材料在60 min时对E. coli、S. aureus和T-Salmonella的抑菌率均达到99.99%且对E. coli最为敏感。抑菌机制表明，该复合材料能破坏细菌的细胞壁进入细菌内部，抑制细菌呼吸，最终使细菌死亡。这一成果有望为解决细菌耐药问题提供新的方案。
- Cu₂S /
- 苯并噻唑 /
- 复合材料 /
- 协同抑菌 /
- 医药
Abstract: With the rapid growth of drug-resistant bacteria, organic bacteriostatic agents have been unable to meet the needs of social public health. High-activity composite bacteriostatic agents can not only retain the properties of single components, but also show more excellent antibacterial properties, thus becoming an important research direction of antibacterial materials. In this study, a novel structure Cu₂S@Sodium 3-(benzothiazol-2-ylthio)-1-propanesulfonate (Cu₂S@SBPF) material, Transmission electron microscopy (TEM), X-ray diffraction (XRD), ultraviolet visible spectrophotometer (UV-vis), Fourier transform infrared spectrometer (FT-IR) and X-ray photoelectron spectroscopy analyzer (XPS) were used to characterize the micromorphology, structure and elemental composition of the samples. The antibacterial properties of the composite against Gram-negative bacteria E. coli, Gram-positive bacteria S. aureus and drug-resistant bacteria T-Salmonella were investigated. The results showed that the antibacterial rate of the composite at the concentration of 500 µg/mL to E. coli, S. aureus and T-Salmonella reached 99.99% at 60 min, and the composite was the most sensitive to E. coli. The antibacterial mechanism showed that the composite material could destroy the cell wall of bacteria into the interior of bacteria, inhibit bacterial respiration, and eventually cause bacterial death. This result is expected to provide a new solution to solve the problem of bacterial drug resistance.
- Cu₂S /
- Benzothiazole /
- Composite materials /
- Synergistic inhibition of bacteria /
- medicine [1]

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图 1 Cu₂S@SBPF复合材料的合成示意图

Figure 1. Illustration of the synthesis of Cu₂S@SBPF composites

SBPF—Sodium 3-(benzothiazol-2-ylthio)-1-propanesulfonate

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图 2 (a) Cu₂S的TEM图；(b) Cu₂S的HRTEM图；(c) (d) (e) Cu₂S的EDS图；

Figure 2. (a) TEM diagram of Cu₂S; (b) HRTEM of Cu₂S; EDS diagram of (c) (d) (e) Cu₂S;

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图 3 (a) (b) (c) Cu₂S、SBPF 、Cu₂S@SBPF的XRD图、红外光谱图和紫外吸收光谱图；(d-i) Cu₂S@SBPF的XPS谱图

Figure 3. (a) (b) (c) XRD、Infrared spectra and UV absorption spectra of Cu₂S, SBPF and Cu₂S@SBPF; (d-i) XPS spectra of Cu₂S@SBPF

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图 4 (a) SBPF和 Cu₂S的优化电子结构和SBPF的静电势(ESP)分析示意图；(b) Cu₂S与SBPF的结合能

Figure 4. (a) Schematic diagram of the optimized electronic structures of SBPF and Cu₂S and the electrostatic potential (ESP) analysis of SBPF; (b) Binding energy between Cu₂S and SBPF

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图 5 不同材料对E. coli、S. aureus和T-Salmonella的滤纸片扩散照片；A、B、C、D 分别对应溶剂蒸馏水、Cu₂S、SBPF以及 Cu₂S@SBPF。图中(a1)代表浓度为0.5、1、2、5 mg/mL的不同抑菌材料对E. coli的抑菌结果照片。(b1)、(c1)为S. aureus 和T-Salmonella的抑菌结果照片；(a2)、(b2)、(c2)分别为不同材料对E. coli、S. aureus、T-Salmonella的抑菌圈直径随浓度变化曲线

Figure 5. Diffusion photos of E. coli, S. aureus and T-Salmonella by different materials on filter paper; A, B, C and D correspond to the solvents distilled water, Cu₂S, SBPF and Cu₂S@SBPF, respectively. In the figure (a1), the antibacterial results of different antibacterial materials with concentrations of 0.5, 1, 2 and 5 mg/mL against E. coli are shown. (b1) and (c1) are photos of antibacterial results of S. aureus and T-Salmonella; (a2), (b2) and (c2) show the inhibition zone diameter curves of different materials against E. coli, S. aureus and T-Salmonella as a function of concentration, respectively.

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图 6 Cu₂S@SBPF复合材料菌落计数照片

Cu₂S@SBPF复合材料抑制 E. coli(a)、S. aureus(b)和 T-Salmonella(c)的菌落计数分布图；(d)为纳米复合材料的时间-杀菌曲线图；(e)图为纳米复合材料对三种测试菌在不同时间的抑菌率比较图

Figure 6. Cu₂S@SBPF Colony count photo of the composite

Cu₂S@SBPF Colony count distribution diagram of E. coli(a), S. aureus(b) and T-Salmonella(c) inhibited by the composite. (d) shows the time-sterilization curve of the nanocomposite; (e) Figure shows the comparison of antibacterial rates of nanocomposites against the three test bacteria at different times

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图 7 (a)Cu₂S@SBPF复合材料与三种测试菌混合5和60 min后的Zeta电位值；(b)ICP-OES测得的铜阳离子累积释放图；(c)复合材料毒理性实验结果

Figure 7. (a) The Zeta potential values of the Cu₂S@SBPF composite after mixing with the three test bacteria for 5 and 60 min; (b) Cumulative release of copper cations measured by ICP-OES; (c) experimental results of toxicity of composite materials

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图 8 Cu₂S@SBPF复合材料对E. coli(d)、S. aureus(e)和 T-Salmonella(f)的 PI 染色照片，(a、b、c)为对应的纯菌对照效果图。Cu₂S@SBPF复合材料作用于E. coli(g)、S. aureus(h)和 T-Salmonella (i)的细胞质泄露结果

Figure 8. Photos of the PI staining of the Cu₂S@SBPF composite for E. coli(d), S. aureus(e) and T-Salmonella(f), and (a, b, c) are the corresponding rendering of the pure bacteria control. Results of cytoplasmic leakage of the Cu₂S@SBPF composite acting on E. coli(g), S. aureus(h), and T-Salmonella (i)

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图 9 Cu₂S@SBPF复合材料抑菌机制图

Figure 9. Cu₂S@SBPF Antibacterial mechanism diagram of composite material

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表 1 溶剂、Cu₂S、SBPF以及 Cu₂S@SBPF对E. coli、S. aureus 和 T-Salmonella的抑菌圈尺寸

Table 1. Inhibition zone size of solvent, Cu₂S, SBPF, and Cu₂S@SBPF against E. coli, S. aureus, and T-Salmonella

Bacterial	Concentration/ (mg·mL⁻¹)	Inhibition zones/cm (±0.05)
Bacterial	Concentration/ (mg·mL⁻¹)	H₂O	Cu₂S	SBPF	Cu₂S@SBPF
E. coli	0.5	0.6	0.9	0.6	1
	1	0.6	1.1	0.7	1.2
	2	0.6	1.6	0.8	1.9
	5	0.6	2.1	1	2.4
S. aureus	0.5	0.6	0.6	0.6	0.7
	1	0.6	0.7	0.6	0.8
	2	0.6	1.2	0.6	1.9
	5	0.6	1.7	0.7	2.3
T-Salmonella	0.5	0.6	0.7	0.6	0.8
	1	0.6	0.8	0.6	1
	2	0.6	1	0.7	1.3
	5	0.6	1.5	0.9	1.6

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