AIM: To study the perception of first-order grating acuity and second-order spatial contrast sensitivity in patients with monocular anisometropia amblyopia.METHODS:A total of 715 children(715 eyes)diagnosed as monocular anisometropia amblyopia in our hospital from January 2018 to December 2022 were collected as amblyopia group, and 745 children(745 eyes)with normal corrected visual acuity were collected. The best corrected visual acuity(BCVA), first-order grating acuity and/or second-order spatial contrast sensitivity were measured, repectively. The perception ability of amblyopia patients to first-order grating acuity and second-order spatial contrast sensitivity were analyzed.RESULTS:There were significant differences between amblyopia group and normal control group in the perception of first-order grating acuity(11.58±6.10 vs. 20.27±3.47, P<0.001)and second-order spatial contrast sensitivity(0.33±0.16 vs 0.12±0.04, P<0.001). And there were significant differences between mild-to-moderate amblyopia and severe amblyopia patients in first-order grating acuity(12.10±6.23 vs. 8.13±3.70, P<0.001)and second-order spatial contrast sensitivity(0.32±0.16 vs. 0.37±0.17, P<0.05).CONCLUSION: The first-order and second-order visual pathway of the cerebral cortex in children with monocular anisometropia amblyopia have different degrees of damage. The injury of severe amblyopia is more serious than that of mild-to-moderate amblyopia.

Extracellular vesicles(EVs)are nano-sized bilayer vesicles that are shed or secreted by virtually every cell type.A variety of biomolecules,including proteins,lipids,coding and non-coding RNAs,and mitochondrial DNA,can be selectively encapsulated into EVs and delivered to nearby and distant recipient cells,leading to alterations in the recipient cells,suggesting that EVs play an important role in intercellular communication.EVs play effective roles in physiology and pathology and could be used as diagnostic and therapeutic tools.At present,although the mechanisms of exosome biogenesis and secretion in donor cells are well understood,the molecular mechanism of EV recognition and uptake by recipient cells is still unclear.This review summarizes the current understanding of the molecular mechanisms of EVs'biological journey in recipient cells,from recognition to uptake and cargo release.Furthermore,we highlight how EVs escape endolysosomal degradation after uptake and thus release cargo,which is crucial for studies applying EVs as drug-targeted delivery vehicles.Knowledge of the cellular processes that govern EV uptake is important to shed light on the functions of EVs as well as on related clinical applications.

Objective To investigate the mechanism of the interaction between miR-9-5p and tissue metalloproteinase inhibitor 2(TIMP2)on autophagy and apoptosis in multiple myeloma(MM)cells.Methods Real-time fluorescence quantitative PCR(qRT-PCR)was used to detect expression levels of miR-9-5p and TIMP2 in bone marrow samples of 9 patients with newly diagnosed MM and 9 patients with recurrent MM.The correlation of expression levels between the two were analyzed.U266 cells were divided into the miR-control group,the miR-9-5p group,the pcDNA3.1 group,the pcDNA3.1-TIMP2 group,the miR-9-5p+pcDNA3.1 group,and the miR-9-5p+pcDNA3.1-TIMP2 group.The effects of overexpressed miR-9-5p and TIMP2 on autophagy and apoptosis in U266 cells were detected by flow cytometry,immunofluorescence staining and Western blot experiments.The dual luciferase report experiment verified the interaction between miR-9-5p and TIMP2.Results Compared with newly diagnosed MM patients,the expression level of miR-9-5p was increased and the expression level of TIMP2 was decreased in patients with recurrent MM.The expression levels of miR-9-5p and TIMP2 were negatively correlated(P<0.05).Compared with the miR-control group,the miR-9-5p group showed a decrease in the expression level of MAP1LC3B-Ⅱ,an increase in expression levels of MAP1LC3B-Ⅰ and SQSTM1,and a decrease in cell apoptosis rate(P<0.05).Compared with the pcDNA3.1 group,the expression level of MAP1LC3B-Ⅱ was increased in the pcDNA3.1-TIMP2 group,while the expression levels of MAP1LC3B-Ⅰ and SQSTM1 were decreased,and the apoptosis rate of cells increased(P<0.05).Bioinformatics and dual luciferase reporter experiments confirmed that TIMP2 was the target gene of miR-9-5p.Conclusion miR-9-5p inhibits autophagy and apoptosis in MM cells by targeting TIMP2,thereby promoting the occurrence and development of MM.

Objective:To explore any effect of following an individualized exercise program on the cardio-pulmonary health of elderly persons with stable chronic obstructive pulmonary disease (COPD).Methods:A total of 120 elderly COPD patients were randomly divided into an experimental group and a control group, each of 60. Both groups were given medication and routine rehabilitation treatment for 3 months, but the experimental group also followed an individualized exercise program based on the cardiopulmonary exercise test. Before and after the treatment, Borg scoring was used to assess the subjects′ degree of dyspnea. Forced expiratory volume (FEV 1), forced vital capacity (FVC), maximum oxygen uptake (VO 2max), anaerobic threshold (AT), heart rate (HR) and a heart index (CI) were also recorded. The 6-minute walk test (6 MWD) was administered to evaluate the rehabilitation effect. Results:There were no significant differences in the average Borg scores, cardiopulmonary function indexes or 6MWD distances between the two groups before treatment. After the treatment significant improvement was observed in all of the measurements in both groups, but at that point all of the experimental group′s averages were better than those of the control group.Conclusion:Individualized exercise based on the cardiopulmonary exercise test can alleviate the symptoms of dyspnea in elderly COPD patients, improve their cardiopulmonary functioning and exercise endurance and improve the rehabilitation effect.

Objective:To investigate the correlation of peripheral blood relative mitochondrial DNA copy number(mtDNAcn)with intrinsic capacity and body composition, and to identify potential biomarkers for healthy aging.Methods:Clinical data of 416 patients admitted to our hospital from September 2019 to June 2021 were consecutively collected.MtDNA was extracted from peripheral blood of these subjects, and mtDNAcn was determined by a real-time fluoresence quantitative reverse transcription-polymerase chain reaction(qRT-PCR). Intrinsic capacity assessment included 5 aspects that were exercise[Morse Fall Scale(MFS), Physiological Frailty Phenotype(PFP), Sarcopenia Questionnaire(SARC-CALF), Short Physical Performance Battery(SPPB), Time Up and Go Test(TUG)]; vitality[Mini Nutritional Assessment(MNA), Multidimensional Prognostic Index(MPI)]; cognition[Mini-Mental State Examination(MMSE)scale]; psychology[Geriatric Depression Scale(GDS), Self-rating Anxiety Scale(SAS)]; sensory capacities[Cumulative Illness Rating Scale-the Comorbidity Index(CIRS-CI)]. To assess body composition, dual-energy X-ray absorptiometry was used to measure body fat, including trunk fat, total body fat, fat in the abdominal region, fat in the buttock region, and then to calculate fat index(FMI)and limb skeletal muscle mass index(ASMI).Results:Spearman correlation analysis showed that mtDNAcn had a negatively correlation with age( r=-0.176, P<0.05). After adjustment for gender and body mass index, partial correlation analysis showed mtDNAcn were still negatively correlated with age( r=-0.144, P<0.05). Furthermore, mtDNAcn was significantly correlated with 4 m gait speed, the scores of SARC-CalF, MFS, MNA, MMSE, MPI and its sub-scale's Activities of Daily Living(ADL)and Short Portable Mental Status Questionnaire(SPMSQ)( r=0.171, -0.207, -0.163, 0.221, 0.184, -0.210, 0.241, -0.269, all P<0.05). After adjustment for age, gender and body mass index, partial correlation analysis showed mtDNAcn still had a significant correlation with gait speed, the scores of MFS, MNA, MPI and SPMSQ( r=0.170, -0.170, 0.148, -0.242, -0.188, all P<0.05). In addition, the Spearman correlation analysis showed that mtDNAcn was positively correlated with FMI, trunk fat, total body fat, abdominal fat and fat in the buttock region( r=0.168, 0.143, 0.175, 0.116, 0.199, all P<0.05). However, after adjustment for age and gender, mtDNAcn was only correlated with FMI, total body fat, fat in the buttock region( r=0.126, 0.131, 0.127, all P<0.05). On the other hand, multiple linear regression analysis showed that mtDNAcn was significantly correlated with age, gait speed, FMI, total body fat, fat in the buttock region, the scores of MFS, PFP, MNA and MPI( β=-0.191, 0.156, 0.126, 0.131, 0.125, -0.119, -0.145, 0.151, -0.171, all P<0.05). Conclusions:MtDNAcn is correlated with physical function, frailty, nutrition, falling, cognition and body composition, and may be considered as a biomarker for the evaluation of the locomotion and vitality of human intrinsic capacity.

Frailty denotes a nonspecific clinical condition characterized by a decrease of physiological reservation in multiple systems, which makes individuals extremely vulnerable to stressors. Frailty increases the incidence of adverse outcomes and death of patients. However, frailty is reversible and preventable. Therefore, this article reviews theoretical models, assessment tools and influencing factors of frailty in elderly patients with hematologic maligilancy, so as to provide references for medical staff to carry out frailty management and related research in elderly patients with hematologic maligilancy.

Chromium is a harmful contaminant showing mutagenicity and carcinogenicity.Therefore,detection of chromium requires the development of low-cost and high-sensitivity sensors.Herein,blue-fluorescent carbon quantum dots were synthesized by one-step hydrothermal method from alkali-soluble Poria cocos polysaccharide,which is green source,cheap and easy to obtain,and has no pharmacological ac-tivity due to low water solubility.These carbon quantum dots exhibit good fluorescence stability,water solubility,anti-interference and low cytotoxicity,and can be specifically combined with the detection of Cr(Ⅵ)to form a non-fluorescent complex that causes fluorescence quenching,so they can be used as a label-free nanosensor.High-sensitivity detection of Cr(Ⅵ)was achieved through internal filtering and static quenching effects.The fluorescence quenching degree of carbon dots fluorescent probe showed a good linear relationship with Cr(Ⅵ)concentration in the range of 1-100 μM.The linear equation was F0/F=0.9942+0.01472[Cr(Ⅵ)](R2=0.9922),and the detection limit can be as low as 0.25 μM(S/N=3),which has been successfully applied to Cr(Ⅵ)detection in actual water samples herein.

Type 2 diabetes mellitus (T2DM) and nonalcoholic fatty liver disease (NAFLD) are the most problematic metabolic diseases in the world. NAFLD encompasses a spectrum of severity, ranging from simple steatosis to non-alcoholic steatohepatitis (NASH) and fibrosis, increasing the risk of cirrhosis and hepatocellular carcinoma. Importantly, NAFLD is closely linked to obesity and tightly interrelated with insulin resistance and T2DM. T2DM and NAFLD (T2DM-NAFLD) are called as the Xike Rixijing Disease and Tonglaga Indigestion Disease respectively, in Mongolian medicine. Xike Rixijing Disease maybe develop into Tonglaga Indigestion Disease. Forturnately many Mongolian medicines show efficient treatment of T2DM-NAFLD, such as Agriophyllum squarrosum, Haliyasu (dried powder of camel placenta), Digeda-4 (herbs of Lomatogonium carinthiacum, rhizomata of Coptis chinensis, ripe fruits of Gardenia jasminoides, herbs of Dianthus superbus), Guangmingyan Siwei Decoction Powder (Halite, ripe fruits of Terminalia chebula, rhizomata of Zingiber officinale, fruit clusters of Piper longum), Tonglaga-5 (ripe fruits of Punica granatum, barks of Cinnamomum cassia, ripe fruits of Amomum kravanh, fruit clusters of Piper longum, flowers of Carthamus tinctorius), Tegexidegeqi (rhizomata of Inula helenium, ripe fruits of Gardenia jasminoides, rhizomata of Platycodon grandiflorum, rhizomata of Coptis chinensis, heartwood of Caesalpinia sappan), Ligan Shiliu Bawei San (ripe fruits of Punica granatum, barks of Cinnamomum cassia, ripe fruits of Amomum kravanh, fruit clusters of Piper longum, flowers of Carthamus tinctorius, ripe fruits of Amomum tsao-ko, rhizomata of Zingiber officinale), etc. Principles of Mongolian medicine in treating diseases: by balancing “three essences or roots” and “seven elements”, strengthening liver and kidney function, transporting nutrients to enhance physical strength and disease resistance, and combined with drugs for comprehensive conditioning treatment. However, their molecular mechanisms remain unclear. In this review, we prospect that Mongolian medicines might be a promising treatment for T2DM-NAFLD by activating P2X7R/NLRP3/NF-κB inflammatory pathway via lipid-sensitive nuclear receptors (i.e., FXR and LXR).

Objective To observe the effect of ultrasound-guided transversus abdominis plane blockon median effective dose of sufentanil in pediatric postoperative analgesia. Methods Forty-fivepediatric patients under-going elective hernia repairsurgery were randomly divided into two groups:group Rop and group Sal. Ultrasound-guided transversus abdominis plane blocks were performed on both groups after general anesthesia induction before the start of surgery. Group Rop received 0.3 mL/kg of 0.25%ropivacaine,and group Sal received 0.3 mL/kg of 0.9%saline. Patient controlled intravenous analgesia pump within sufentanil was used in both groups after operation. Used the sequential method to determine the median effective dose of sufentanil ,recorded the times of the pressing self-control analgesia within 6h after operation,the use of sufentanil,postoperative pediatric pain(FLACC)score and adverse reactions. Results 1. The median effective dose of sufentanil in group Rop was lower than group Sal (0.0259 μg/(kg · h)vs 0.0379 μg/(kg · h)). 2.The times of the pressing self-control analgesia within 6 h after operation and the use of sufentanil in group Rop were less than in group Sal. 3.The postoperative FLACC score at different points in group Rop was lower than in group Sal(P < 0.05). 4.There were no significant difference(P >0.05)in incidence of adverse reactions in both groups. Conclusion The ultrasound-guided transversus abdominis plane block in pediatric lower abdominal surgery can effectively reduce the median effective dose of sufentanil.

Objective The purpose of study was to investigate the differences in the value of urine acute kidney injury ( AKI) biomarkers in the diagnosis and prognosis of AKI in patients with or without acute respiratory distress syndrome ( ARDS ) . Methods We collected the clinical data about 304 ICU patients, in-cluding 105 ARDS (49 in the lungs and 48 outside the lungs) and 199 non-ARDS cases.Using ELISA, we determined the levels of uN-GAL, uL-FABP, uKIM-1, and uIL-18 in the first 48 hours, compared the clinical data and AKI biomarkers between different groups of patients.We analyzed the differences in the diagnostic value of the AKI biomarkers using the ROC curve and their value in predicting hospital mortality by logistic regression analysis. Results Compared with the patients without AKI, the AKI cases exhibited a signif-icantly increased level of uKIM-1 (1.02 [0.57, 3.01] vs 4.68 [54.74, 270.54], P=0.000) in the ARDS group and that of uL-FABP in the non-ARDS group (102.69 [37.98, 348.09] vs 53.52 [10.86, 141.39], P=0.009).In the ARDS group, the area under the ROC curve (AUC) for the combined efficiency of the four AKI biomarkers was 0.81 (95% CI 0.70-0.92), markedly higher than that of uNGAL (0.57 [95%CI 0.43-0.70]), uL-FABP (0.55 [95%CI 0.39-0.71]), and uIL-18 (0.56 [95%CI 0.40-0.72]) alone (P<0.05), so was the AUC for the combined efficiency of the four biomarkers than that of each biomarker alone in the patients with ARDS in or outside the lungs (P<0.05).The OR value of uKIM-1 for predicting hospital mortality was 1.529 (95%CI 1.148-2.036) in the ARDS group, 1.593 (95%CI 1.070-2.369) in the patients with ARDS in the lungs, and 1.512 (95%CI 1.005-2.274) in those with ARDS outside the lungs. Conclusion There were differences of diagnostic and predictive value of Urine AKI biomarkers have different values in the diagnosis and prognosis of AKI in ARDS and non-ARDS patients and in those with ARDS in or outside the lungs.