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Combination therapy based on Prussian blue nanoparticles (PB NPs) is particularly effective in cancer because of their outstanding photothermal properties and excellent biocompatibility. However, the application of PB in tumor therapy is hindered by their poor reactive oxygen species (ROS) production capacity, and low drug loading rate. More importantly, PB NPs could activate heat shock proteins (HSPs) in photothermal therapy, which induces the self-protection of tumor cells. Structural and functional modulation improved antitumor efficacy by enhancing reactive oxygen species (ROS) production and inhibiting heat shock protein expression. In this work, we synthesized Cu2+-enriched hollow nanoporous PB nanocubes (Cu-HNPB NCs) that enhanced the •OH generating capability of PB as Cu hybridization increases the oxidation potential of PB. Moreover, in the tumor milieu, Cu2+ release depletes glutathione (GSH) and converts to Cu+, further improving ROS levels. Excess ROS amplifies cellular oxidative stress and destroys the heat-induced formation of HSPs, thus breaking the self-protection mechanism of tumor cells. To enhance the therapeutic efficiency, quercetin (QUE) was loaded in Cu-HNPB NCs (Cu-HNPB@QUE NCs). Surprisingly, the large specific surface area (127.79 m2 g–1) endowed Cu-HNPB NCs with ultrahigh loading capacity (57.25%). As the nanoplatform enhances synergistic therapeutic effects, this study provides a new approach for designing multimodal combination nanomedicine. [ABSTRACT FROM AUTHOR]

Presently, antibiotic resistant bacteria (ARB) have been commonly found in environment, such as air, soil and lakes. Therefore, it is urgent and necessary to prepare antimicrobial agents with excellent anti-antibiotic resistant bacteria. In our research, poly-ethylene glycol functionalized molybdenum disulfide nanoflowers (PEG-MoS2 NFs) were synthesized via a one-step hydrothermal method. As-prepared PEG-MoS2 NFs displayed excellent photothermal conversion efficiency (30.6%) and photothermal stability. Under 808 nm NIR laser irradiation for 10 min, the inhibition rate of tetracycline-resistant Bacillus tropicalis and Stenotrophomonas malphilia reached more than 95% at the concentration of 50 μg/mL. More interestingly, the photothermal effect of PEG-MoS2 NFs could accelerate the oxidation of glutathione, resulting in the rapid death of bacteria. A functionalized PEG-MoS2 NFs photothermal anti-antibiotic resistant system was constructed successfully. [ABSTRACT FROM AUTHOR]

Nanozymes with excellent broad-spectrum antibacterial properties offers an alternative strategy for food preservation. This review comprehensively summarized the antibacterial mechanisms of nanozymes, including the generation of reactive oxygen species (ROS) and the destruction of biofilms. Besides, the primary factors (size, morphology, hybridization, light, etc.) regulating the antibacterial activity of different types of nanozymes were highlighted in detail, which provided effective guidance on how to design highly efficient antibacterial nanozymes. Moreover, this review presented elaborated viewpoints on the unique applications of nanozymes in food preservation, including the selection of nanozymes loading matrix, fabrication techniques of nanozymes-based antibacterial films/coatings, and the recent advances in the application of nanozymes-based antibacterial films/coatings in food preservation. In the end, the safety issues of nanozymes have also been mentioned. Overall, this review provided new avenues in the field of food preservation and displayed great prospects.

Objective: To systematically evaluate the clinical effect and reliability of linezolid in the treatment of pulmonary tuberculosis complicated with severe pneumonia., Methods: A comprehensive search was conducted to screen the published literature on linezolid therapy in pulmonary tuberculosis complicated with severe pneumonia in PubMed, Embase, Web of Science, Cochrane Library, and published databases of China National Knowledge Infrastructure. After screening the internal data of the literature, the quality of the literature was assessed uniformly. RevMan5.3 was used for meta-analysis., Results: The search identified 1202 clinical patients in 24 articles. Meta-analysis results revealed that linezolid treatment was associated with better bacterial clearance rate (OR=3.66 [2.41, 5.58], P<0.001) and superior total clinical effective rate (OR=5.80 [3.92, 8.58], P<0.001) in patients. The linezolid treatment resulted in lower levels of serum inflammatory factors TNF-α (WMD=-10.75 [-13.63, -7.87], P<0.001), IL6 (WMD=-10.16 [-13.50, -6.82], P<0.001), and IL8 (WMD=-8.31 [-10.41, -6.21], P<0.001). There was no obvious distinction in the occurrence of adverse reactions between the linezolid group and the control group (OR=1.34 [0.86, 2.08], P=0.19)., Conclusion: Linezolid combined with conventional anti-tuberculosis treatment has a better bacterial clearance rate and clinical total effective rate than conventional anti-tuberculosis programs with reliable safety., Competing Interests: None., (AJTR Copyright © 2022.)