pH-responsive release and washout resistance of chitosan-based nano-pesticides for sustainable control of plumeria rust

Yi, Zhigang; Wu, Jian; Zhou, Jun; Lin, Sukun; Cheng, Dongmei

doi:10.1016/j.ijbiomac.2022.09.144

Cited by 19 publications

(12 citation statements)

References 34 publications

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“…The cumulative release amounts in the solution at pH 5.0, 7.0, and 9.0 reached 80.43, 57.37, and 39.66%, respectively, after 100 h, with the least amount of Teb recorded at pH 9.0. One possible reason for the faster release rate under acidic condition was that the CS layer on the surface of MSNs swelled in an acidic environment, and consequently, the mesoporous channels of the MSNs were opened. , As revealed by the above-mentioned results, Teb@MSNs@CS can be highly responsive to pH values.…”

Section: Resultsmentioning

confidence: 92%

“…One possible reason for the faster release rate under acidic condition was that the CS layer on the surface of MSNs swelled in an acidic environment, and consequently, the mesoporous channels of the MSNs were opened. 39,40 As revealed by the above-mentioned results, Teb@MSNs@CS can be highly responsive to pH values.…”

Section: Preparation and Characterization Of Teb@msnsmentioning

confidence: 99%

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Tebuconazole-Loaded Mesoporous Silica Nanoparticles Encapsulated with Chitosan and Their Application in Wheat Growth

Dai

Shi³

et al. 2023

ACS Agric. Sci. Technol.

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Controlled-release pesticide formulation exhibiting low phytotoxicity and long-term effectiveness is highly promising. In this work, a novel pH stimuli-responsive pesticide delivery system was established by combining spray drying with ion crosslinking to coat chitosan onto tebuconazole-loaded mesoporous silica nanoparticles (Teb@MSNs@CS). The results demonstrated that the loading capacity of Teb@MSNs@CS for tebuconazole (Teb) was approximately 25.80%. The chitosan attached on the mesoporous silica nanoparticles could extend the release time of Teb both in the solution medium and soil column. Meanwhile, the coated chitosan endowed the pH-responsive release of Teb. The bioactivity survey confirmed that Teb@MSNs@CS exhibited enhanced control of Fusarium graminearum compared to pure Teb. Moreover, Teb@MSNs@CS displayed lower phytotoxicity than both Teb@MSNs and pure Teb during wheat germination and seeding growth experiments. As revealed by the above-mentioned results, the use of responsive carriers as the pesticide-delivery systems can be potentially implemented in wheat growth.

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Section: Resultsmentioning

confidence: 92%

Section: Preparation and Characterization Of Teb@msnsmentioning

confidence: 99%

Tebuconazole-Loaded Mesoporous Silica Nanoparticles Encapsulated with Chitosan and Their Application in Wheat Growth

Dai

Shi³

et al. 2023

ACS Agric. Sci. Technol.

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“…Imipenem release from Imi@ZIF-8 was monitored at pH = 7.4 and pH = 6.5 to investigate the acidic pH response properties of Imi@ZIF-8. Specifically, 5 mL of Imi@ZIF-8 was packed into dialysis bags, which were then immersed in 50 mL of PBS solution at pH = 7.4 and pH = 6.5, respectively ( Zhou et al, 2022 ). The dialysate was collected at 6, 12, 18, and 24 h. The absorbance value of imipenem in the dialysate at 299 nm was measured using a UV-Vis spectrophotometer to determine the cumulative release of imipenem from the solution, and the percentage release—time curves at pH = 7.4 and pH = 6.5 were plotted.…”

Section: Methodsmentioning

confidence: 99%

A fresh pH-responsive imipenem-loaded nanocarrier against Acinetobacter baumannii with a synergetic effect

Gui

Feng

et al. 2023

Front. Bioeng. Biotechnol.

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In recent years, the treatment of Acinetobacter baumannii infections has become a pressing clinical challenge due to its increasing incidence and its serious pathogenic risk. The research and development of new antibacterial agents for A. baumannii have attracted the attention of the scientific community. Therefore, we have constructed a new pH-responsive antibacterial nano-delivery system (Imi@ZIF-8) for the antibacterial treatment of A. baumannii. Due to its pH-sensitive characteristics, the nano-delivery system offers an improved release of the loaded imipenem antibiotic at the acidic infection site. Based on the high loading capacity and positive charge of the modified ZIF-8 nanoparticles, they are excellent carriers and are suitable for imipenem loading. The Imi@ZIF-8 nanosystem features synergistic antibacterial effects, combining ZIF-8 and imipenem to eliminate A. baumannii through different antibacterial mechanisms. When the loaded imipenem concentration reaches 20 µg/mL, Imi@ZIF-8 is highly effective against A. baumannii in vitro. Imi@ZIF-8 not only inhibits the biofilm formation of A. baumannii but also has a potent killing effect. Furthermore, in mice with celiac disease, the Imi@ZIF-8 nanosystem demonstrates excellent therapeutic efficacy against A. baumannii at imipenem concentrations of 10 mg/kg, and it can inhibit inflammatory reaction and local leukocyte infiltration. Due to its biocompatibility and biosafety, this nano-delivery system is a promising therapeutic strategy in the clinical treatment of A. baumannii infections, providing a new direction for the treatment of antibacterial infections.

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“…The peak observed by FTIR at 3058 cm −1 is the unsaturated C−H stretching vibration of the benzene ring, 35 the peak at 2956 cm −1 is attributed to the stretching vibration of methylene, 36 and the peak observed at 1735 cm −1 is the stretching vibration of carbonyl. 37 The stretching vibration of the benzene ring leads to the absorption peak at 1486 cm −1 , 38,39 and the absorption peak observed at 1250 cm −1 is attributed to the stretching vibration of C−O−C.…”

Section: Characterization Of β-Cyp Ec-2 β-Cyp (Tc)mentioning

confidence: 99%

Effect of Brucea javanica Oil on the Toxicity of β-Cypermethrin Emulsifiable Concentrate Formulation

Wu,

Yang,

Zheng

et al. 2024

ACS Appl. Mater. Interfaces

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Enhancing the performance of traditional pesticide formulations by improving their leaf surface wetting capabilities is a crucial approach for maximizing the pesticide efficiency. This study develops an emulsifiable concentrate (EC) of 4.5% β-cypermethrin containing Brucea javanica oil (BJO). The incorporation of BJO aims to improve the leaf-wetting properties of the EC formulation and enhance its insecticidal effectiveness. The droplet size and emulsion characteristics of β-CYP EC emulsion with varying concentrations of the emulsifier were evaluated, and changes after incorporating BJO were assessed to develop the optimal formulation. A comprehensive comparison was conducted among commercial 4.5% β-cypermethrin EC (β-CYP EC-1), 4.5% βcypermethrin EC with BJO (β-CYP EC-2), and 4.5% βcypermethrin EC without BJO (β-CYP EC-3). This comparison encompassed various factors including storage stability, insecticidal activity, cytotoxicity, and wetting performance on cabbage leaves. The results indicated that the ideal emulsifier concentration was 15% emulsifier 0201B. β-CYP EC-2 demonstrated superior wetting properties on cabbage leaves (the wetting performance of β-CYP EC-2 emulsion on cabbage leaves is 2.60 times that of the β-CYP EC-1 emulsion), heightened insecticidal activity against the third larvae of Plutella xylostella [diamondback moth (DBM)] [the insecticidal activity of the β-CYP EC-2 emulsion against the third larvae of DBM is 1.93 times that of the β-CYP EC-1 emulsion (12 h)], and more obvious inhibitory effects on the proliferation of DBM embryo cells than the other tested formulations. These findings have significant implications for advancing pest control strategies and promoting sustainable and effective agricultural practices.

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pH-responsive release and washout resistance of chitosan-based nano-pesticides for sustainable control of plumeria rust

Cited by 19 publications

References 34 publications

Tebuconazole-Loaded Mesoporous Silica Nanoparticles Encapsulated with Chitosan and Their Application in Wheat Growth

Tebuconazole-Loaded Mesoporous Silica Nanoparticles Encapsulated with Chitosan and Their Application in Wheat Growth

A fresh pH-responsive imipenem-loaded nanocarrier against Acinetobacter baumannii with a synergetic effect

Effect of Brucea javanica Oil on the Toxicity of β-Cypermethrin Emulsifiable Concentrate Formulation

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