Effects of video-recorded role-play and guided reflection on nursing student empathy, caring behavior and competence: A two-group pretest-posttest study.

AIM: The study examined the differences in nursing student empathy, caring behavior and competence between the experimental and control groups before and after educational intervention and to predict the factors affecting their core competencies. BACKGROUND: Educating nursing students in empathy and caring behaviors before entering clinical practice is challenging. DESIGN: We used a two-group pretest and post-test quasi-experimental design. METHODS: First-year nursing students from medical schools in Taiwan participated in our study. Data were collected between March and May 2022. The learning method used with the intervention group was role-playing with videos and guided reflection. The control group was exposed to traditional curriculum. Empathy, caring behavior and competence were measured using the Jefferson Scale of Empathy- Healthcare Providers, the Caring Behaviors Scale and the Nursing Student Competence Scale. RESULT: A total of 72 participants (40 in the experimental group and 32 in the control group) were included in the final statistical analysis. The response rate was 92%. Statistically significant differences in nursing student empathy, caring behavior and competence were observed between the experimental and control groups (p < .05). The η2 effect levels were 0.083, 0.223 and 0.270. Higher caring behavior scores were significantly associated with higher nursing student competence scores (ß = 0.81, 95% CI:0.66-0.97). CONCLUSIONS: Education based on video role-play and guided reflection improved empathy, caring behavior and nursing competence in first-year nursing students.

MicroRNAs of bone marrow mesenchymal stem cell-derived exosomes regulate acute myeloid leukemia cell proliferation and apoptosis.

BACKGROUND: Acute myeloid leukemia (AML) is a malignant hematological disease, originating from hematopoiesis stem cell differentiation obstruction and clonal proliferation. New reagents or biologicals for the treatment of AML are urgently needed, and exosomes have been identified as candidate biomarkers for disease diagnosis and prognosis. This study aimed to investigate the effects of exosomes from bone marrow mesenchymal stem cells (BMSCs) on AML cells as well as the underlying microRNA (miRNA)-mediated mechanisms. METHODS: Exosomes were isolated using a precipitation method, followed by validation using marker protein expression and nanoparticle tracking analysis. Differentially expressed miRNAs were identified by deep RNA sequencing and confirmed by quantitative real-time polymerase chain reaction (qPCR). Cell proliferation was assessed by the 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium inner salt method, and cell cycle progression and apoptosis were detected by flow cytometry. Functional gene expression was analyzed by qPCR and Western blotting (WB). Significant differences were determined using Student's t test or analysis of variance. RESULTS: BMSCs-derived exosomes effectively suppressed cell proliferation (both P < 0.0001 at 10 and 20 µg/mL) and cell cycle progression (P < 0.01 at G0-G1 stage), and also significantly enhanced cell apoptosis (P < 0.001) in KG-1a cells. There were 1167 differentially expressed miRNAs obtained from BMSCs-derived exosomes compared with KG-1a cell-derived exosomes (P < 0.05). Knockdown of hsa-miR-124-5p in BMSCs abrogated the effects of BMSCs-derived exosomes in regulating KG-1a such as the change in cell proliferation (both P < 0.0001 vs. normal KG-1a cell [NC] at 48 and 72 h). KG-1a cells treated with BMSCs-derived exosomes suppressed expression of structural maintenance of chromosomes 4 (P < 0.001 vs. NC by qPCR and P < 0.0001 vs. NC by WB), which is associated with the progression of various cancers. This BMSCs-derived exosomes effect was significantly reversed with knockdown of hsa-miR-124-5p (P < 0.0001 vs. NC by WB). CONCLUSIONS: BMSCs-derived exosomes suppress cell proliferation and cycle progression and promote cell apoptosis in KG-1a cells, likely acting through hsa-miR-124-5p. Our study establishes a basis for a BMSCs-derived exosomes-based AML treatment.