Targeting drug delivery systems mediated by nanoparticles has shown great potential in the diagnosis and treatment of cancer. However, influences of different tumor progressions on the accumulation of nanoparticles, especially the ligand-modified active targeting nanoparticles are seldom exploited. In this work, the accumulation and penetration of RGD-modified gold nanoparticles (active AuNPs) with different sizes were investigated in orthotopic breast cancer with different tumor progressions. The results showed that the smallest active AuNPs had better accumulation and permeation effects in early tumor tissues with the relatively looser extracellular matrix, larger gaps, lower interstitial fluid pressure, and less receptor expression, which was due to size effects. However, the larger active AuNPs had better accumulation and penetration effects in late tumor tissues with highly expressed target receptors integrin α _v β ₃ because of the multivalent interactions between larger active nanoparticles and integrin α _v β ₃. In the midterm, tumor accumulation of active AuNPs was equally influenced by size effects and multivalent interactions. Therefore, RGD-modified nanoparticles with sizes of 7 and 90 nm accumulated more in tumors. This study will guide a rational design of active targeting nanoparticles for enhancing the diagnosis and treatment of tumors based on their progressions.

ObjectiveTo analyse the clinical characteristics of different traditional Chinese medicine （TCM） syndromes in patients with heart failure based on information from electronic medical record. MethodsA cross-sectional study was conducted to collect clinical data of all inpatients with heart failure in the Department of Cardiology， Affiliated Hospital of Liaoning University of Traditional Chinese Medicine from January 1， 2019 to December 31， 2020. A database of clinical TCM data was established to explore the characteristics of clinical data of basic information， syndromes and syndrome element types， and biochemical indexes. The distribution of TCM syndromes and syndrome elements in heart failure patients were also analysed， and the basic information and biochemical indexes of the patients with top 7 different TCM syndrome types were compared. ResultsA total of 1676 inpatients with heart fai-lure were included. The top 7 TCM syndromes of heart failure were syndrome of phlegm turbidity and blood stasis （477 cases， 28.46%）， syndrome of qi deficiency and blood stasis （439 cases， 26.19%）， syndrome of qi deficiency and blood stasis with water retention （274 cases， 16.35%）， syndrome of yang deficiency with water retention （145 cases， 8.65%）， syndrome of qi and yin deficiency （104 cases， 6.21%）， syndrome of qi and yin deficiency with blood stasis （80 cases， 4.77%）， syndrome of heart yang deficiency （59 cases， 3.52%）. Among the 1676 patients， 6 syndrome elements accounted for more than 5%. Blood stasis accounted for the highest proportion of TCM syndrome element type （1292 cases， 77.09%）， followed by qi deficiency （919 cases， 54.83%）， phlegm （498 cases， 29.71%）， water retention （434 cases， 25.89%）， yang deficiency （215 cases， 12.82%） and yin deficiency （191 cases， 11.40%）. Among the 1676 patients， 1308 cases of acute heart failure mainly showed syndrome of phlegm turbidity and blood stasis （386 cases， 29.51%）， and 368 of chronic heart fai-lure mainly showed syndrome of qi deficiency and blood stasis （118 cases， 32.07%）. Patients with syndrome of phlegm turbidity and blood stasis had the shortest disease duration of 0.3 months， while those with syndrome of heart yang deficiency had the longest disease duration of 15 months. The proportion of syndrome of phlegm turbidity and blood stasis was the highest in patients with heart failure combined with coronary artery disease， the proportion of syndrome of qi deficiency and blood stasis with water retention was the highest in patients with heart failure combined with atrial fibrillation， and the proportion of patients with syndrome of qi deficiency and blood stasis with water retention and syndrome of yang deficiency with water retention in those applying diuretics during the hospital stay was the highest with more than 86%. The different 7 TCM syndromes showed statistically difference in patients with complications including coronary artery disease， old myocardial infarction， atrial fibrillation， pre and post-admission medication usage including intravenous vasodilators， cardiac stimulants， diuretics， and level of blood chloride， blood urea， blood creatinine， blood bicarbonate， blood albumin， and blood total bilirubin （P＜0.05）. ConclusionThe most common TCM syndromes in patients with heart failure are syndrome of phlegm turbidity and blood stasis and syndrome of qi deficiency and blood stasis. Different TCM syndromes have different characteristics in gender， disease complications， medication before and after admission， and blood indexes.

Objective:To compare the short-term and long-term efficacies and safety of short-term spinal cord stimulation (st-SCS) and pulsed radiofrequency (PRF) in treating zoster-associated pain (ZAP).Methods:A total of 208 ZAP patients who received treatment in Department of Pain Management, Provincial Hospital Affiliated to Shandong University from January 2019 to September 2021 were selected. They were divided into st-SCS group ( n=107) and PRF group ( n=101) according to different treatments. After differences of baseline data being balanced by 1∶1 propensity score matching between the two groups, scores of numerical rating scale (NRS), NRS remission rate, drug dosage, Pittsburgh Sleep Quality Index (PSQI) and complications of 86 patients from each 2 groups were compared and analyzed before surgery, 3 and 7 d after surgery, at discharge, and 1, 3, 6, 12 and 24 months after surgery. Results:NRS scores in st-SCS group and PRF group 3 and 7 d after surgery, at discharge, and 1, 3, 6, 12 and 24 months after surgery were significantly lower than those before surgery ( P<0.05). NRS scores in st-SCS group were significantly lower than those in PRF group at discharge and 1, 3, 6 and 12 months after surgery ( P<0.05). NRS remission rate in st-SCS group was significantly higher than that in PRF group at discharge and 1, 3, 6, 12 and 24 months after surgery, and total effective rate in st-SCS group was significantly higher than that in PRF group 1, 3, 6, and 12 months after surgery ( P<0.05). The pregabalin and gabapentin dosages in st-SCS group and PRF group 1, 3, 6, 12, and 24 months after surgery were significantly lower than those before surgery, and the gabapentin dosage in st-SCS group was significantly lower than that in PRF group 3 months after surgery ( P<0.05). PSQI in st-SCS group and PRF group at discharge and 6, 12 and 24 months after surgery was significantly decreased compared with that before surgery, and PSQI in st-SCS group at discharge and 6, 12 and 24 months after surgery was significantly decreased compared with that in PRF group ( P<0.05). No serious complications as spinal epidural hematoma or spinal nerve root and spinal cord injuries occurred in st-SCS group and PRF group. Conclusion:Both st-SCS and PRF can treat ZAP safely and effectively, but st-SCS has more advantages than PRF.

Objective:To establish a sequencing method for the genome of severe fever with thrombocytopenia syndrome virus (SFTSV) based on next-generation sequencing (NGS).Methods:SFTSV RNA was extracted from serum samples of patients with severe fever with thrombocytopenia syndrome. SFTSV-specific primers were designed using Primer 5.0 software. A multiplex PCR method was constructed and used to amplify the nucleotide sequence of SFTSV. Whole-genome sequencing was performed on the NGS platform.Results:The whole genes of SFTSV isolates in 28 serum samples were amplified by the multiplex PCR with a coverage over 94%. Sequencing and phylogenetic analysis of those strains revealed that the predominant strains ( n=20) belonged to genotype A, followed by genotypes B ( n=4) and E ( n=3). Conclusions:A high-throughput sequencing method for SFTSV based on multiplex PCR was established in this study. This method was characterized by high specificity and good quality and could improve the sequencing efficiency.

Objective To explore the values of apparent diffusion coefficients (ADC) in staging the lesions of multiple sclerosis (MS) through analysing the differences of ADC in different types of lesions.Methods 137 lesions identified in 29 patients with MS,were characterized by their enhancement pattern on contrast-enhanced T1-weighted MR images and whether they were changing in appearance, size or signal.The lesions were classified into four groups:homogeneously enhancing lesions (HELs), ring-enhancing lesions (RELs), active nonenhancing lesions (ANELs), and inactive nonenhancing lesions (INELs).The mean ADC values for each type of lesions were calculated and compared.Results The ADC values for HELs, RELs, ANELs and INELs were (91.09±13.63)× 10 5 · m2 · s-1, (105.66±9.92) × 10-5 · m2 · s-1, (136.80±20.31) × 10-5 · m2 · s-1 and (127.46±13.65) ×10-5 · m2 · s-1.There were significant differences between the ADC values of any two groups in the four groups except the ADC values between ANELs and INELs.Conclusion ADC values are useful to differentiate each type of lesion,which can help stage the lesions of MS.