Dual-Signal Chemical Exchange Saturation Transfer (Dusi-CEST): An Efficient Strategy for Visualizing Drug Delivery Monitoring in Living Cells.

We report a dual-signal chemical exchange saturation transfer (Dusi-CEST) strategy for drug delivery and detection in living cells. The two signals can be detected by operators in complex environments. This strategy is demonstrated on a cucurbit[6]uril (CB[6]) nanoparticle probe, as an example. The CB[6] probe is equipped with two kinds of hydrophobic cavities: one is found inside CB[6] itself, whereas the other exists inside the nanoparticle. When the probe is dispersed in aqueous solution as part of a hyperpolarized 129Xe NMR experiment, two signals appear at two different chemical shifts (100 and 200 ppm). These two resonances correspond to the NMR signals of 129Xe in the two different cavities. Upon loading with hydrophobic drugs, such as paclitaxel, for intracellular drug delivery, the two resonances undergo significant changes upon drug loading and cargo release, giving rise to a metric enabling the assessment of drug delivery success. The simultaneous change of Dusi-CEST likes a mobile phone that can receive both LTE and Wi-Fi signals, which can help reduce the occurrence of false positives and false negatives in complex biological environments and help improve the accuracy and sensitivity of single-shot detection.

Incidence of pressure injuries in fracture patients: A systematic review and meta-analysis.

OBJECTIVE: To systematically evaluate the incidence of pressure injuries (PIs) in hospitalized fracture patients and to provide evidence for the prevention and treatment of PIs. METHODS: A systematic review and meta-analysis was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-analysis (PRISMA) guidelines. Electronic databases including PubMed, Embase, the Cochrane Library, Web of Science, CINAHL, China Knowledge Resource Integrated Database (CNKI), WanFang Database, Weipu Database (VIP), and Chinese Biomedical Database (CBM) were searched to collect cross-sectional studies and cohort studies related to PIs among hospitalized fracture patients. All electronic literature sources were searched from inception to March 2022, and a hand-search through references was also conducted to find relevant articles. Studies were evaluated independently by two researchers and audited by a third researcher. The data were extracted and presented in tables. The risk of bias was assessed using the Joanna Briggs Institute (JBI) Critical Appraisal Checklist. All data analysis used Stata14.0. The I2 statistic and random-effects model were used to determine the heterogeneity. RESULTS: A total of 7906 articles were screened, and 18 studies with 8956 patients were ultimately involved in this review. The pooled incidence of PIs in the fracture patients was 20.4% (95%CI: 14.9 to 25.8), and the incidence of PIs only in spinal and hip fracture patients was 23.9% (95%CI: 19.6 to 28.2). The incidence of PIs in 65 years old or over was significantly high (23.3% [95%CI: 15.3 to 31.2]). The most affected body sites were sacrococcygeal regions (56.7%) and heels (19.9%). The most common stages were stage 2 (62.2%) and stage 1 (17.4%). CONCLUSION: The overall incidence of PIs in fracture patients was as high as 20.4%, significantly higher than the average incidence of adults. We found that the potential for PIs in fracture patients increases with age. Hence, our discoveries recommended that healthcare givers should consider reducing the occurrence of PIs. Additionally, more research may be conducted to improve the understanding of characteristics of PIs among fracture patients and to identify PIs risk factors to prevent and treat them effectively.

Effect of Exercise Therapy on Cancer-Related Fatigue in Patients With Breast Cancer: A Systematic Review and Network Meta-analysis.

OBJECTIVE: This study aimed to explore the efficacy of different exercise therapies in reducing fatigue in patients with breast cancer. DESIGN: PubMed, Embase, Web of Science, Cochrane Library, Cumulative Index to Nursing and Allied Health Literature, China Biology Medicine, China National Knowledge Infrastructure, Database of Chinese Sci-tech Periodicals, and Wanfang databases were searched from their inception to March 2022. The authors independently screened all randomized controlled trials of exercise therapy in patients with breast cancer. A network meta-analysis was performed using Stata 16.0 software. RESULTS: Seventy-eight studies were analyzed, with 167 comparisons and 6235 patients. The network results showed that stretching (standardized mean difference = -0.74, confidence interval = -1.43 to -0.06), yoga (standardized mean difference = -0.49, confidence interval = -0.75 to -0.22), combined exercise (standardized mean difference = -0.47, confidence interval = -0.70 to -0.24), aerobic exercise (standardized mean difference = -0.46, confidence interval = -0.66 to -0.26), and resistance exercise (standardized mean difference = -0.42, confidence interval = -0.77 to -0.08) significantly reduced fatigue. Pairwise comparisons confirmed that yoga, combined exercise, aerobic exercise, and resistance exercise were positively associated with fatigue relief. However, no significant association was identified between reduced fatigue and traditional Chinese exercises or stretching. CONCLUSIONS: The most effective exercise therapy to relieve cancer-related fatigue in patients with breast cancer was yoga, followed by combined aerobic and resistance exercises. It is expected that more randomized controlled trials will be conducted to further explore the efficacy and mechanisms of exercise.

lncRNA NEAT1 promotes the proliferation and metastasis of hepatocellular carcinoma by regulating the FOXP3/PKM2 axis.

Objective: Hepatocellular carcinoma (HCC) is a malignant tumor. The occurrence of HCC is involved in the alteration of a variety of oncogenes or tumor suppressor genes, but the specific molecular mechanism remains unknown. This research proved the effects of long non-coding RNA NEAT1 (lncRNA NEAT1) on the viability, proliferation, migration, and invasion of hepatocellular carcinoma cells and explored the mechanism behind these effects. Methods: NEAT1 in 97H and Huh7 cell lines was overexpressed or knocked down, respectively. The expression of FOXP3 and its target gene PKM2 was hinged on qRT-PCR and Western blot, respectively. RNA pulldown and RNA immunoprecipitation experiments were carried out to detect the interaction between NEAT1 and proteins. Finally, the effect of NEAT1 on the tumor volume of HCC was verified by animal experiments. Results: A series of experiments have shown that NEAT1 knockdown can inhibit the viability, proliferation, migration, and invasion of HCC cells; NEAT1 can bind FOXP3 to promote PKM2 transcription; PKM2 knockdown can inhibit the viability, proliferation, migration, and invasion of HCC cells; and PKM2 knockdown reversed the function of NEAT1. Conclusion: lncRNA NEAT1 can promote the malignant behavior of HCC cells, while silencing of NEAT1 can inhibit that behavior of HCC cells. Mechanically, NEAT1 promotes the transcriptional activation of PKM2 by binding FOXP3, and PKM2 knockout reverses the function of NEAT1.

Photosensitive MRI biosensor for BCRP-Targeted uptake and light-induced inhibition of tumor cells.

Riboflavin and its derivatives are the most important coenzymes in vivo metabolism, and are closely related to life activities. In this paper, the first photolysis 129Xe biosensor was developed by combining cryptophane-A with riboflavin moiety, which showed photosensitivity recorded by hyperpolarized 129Xe NMR/MRI technology with an obvious chemical shift change of 5.3 ppm in aqueous solution. Cellular fluorescence imaging confirmed that the biosensor could be enriched in MCF-7 cells, and MTT assays confirmed that the cytotoxicity was enhanced after irradiation. Findings suggested that the biosensor has a potential application in tumor targeting and the inhibition of tumor cell proliferation after photodegradation.