The molecular mechanism underlying muscular atrophy and gravisensing during spaceflight is still unknown. The major effects of spaceflight on body-wall muscles of Caenorhabditis elegans (C. elegans) in the structures and functions wore examined, and five important muscle-related genes and three proteins were studied after nearly 15-day spaceflight. The changes for the wall-muscles were observed in situ. Decreased muscle fiber size was observed with myosin immunofluorescence and duller dense-body staining in flight samples, which suggested that muscular atrophy had happened during spaceflight. However, F-actin staining showed no differences between the spaceflight group and ground control group. Otherwise, after returning to the earth the C eleganu displayed reduced rate of movement with a lower ratio (height/width) in crawl trace wave, which indicated a functional defect. These results demonstrated that C. elegans muscular development was changed in response to microgravity, and changes also occurred at the level of gene transcription and protein translation. Expression of dys-I increased significantly in body-wall muscles, while hlh-1, myo-3, uric-54 and eg1-19 RNA levels decreased after spaceflight. Dystrophin (encoded by dys-1) is one of important components in dystrophin-glycoprotein complex (DGC). Increased dys-I expression after flight implied that the muscular cell would accept more gravity signals by DGC in mierogravity in order to keep mechanical balance within the cells. It is concluded that DGC was involved into the mechanical transduction in body-wall muscles of C. elegans when gravity varied, which potentially played a vital role in gravisensing. The changes ofhlh-l, myo-3, tmc-54 and egl-19 suggested that they had the effects of promoting microgravity-induced muscular atrophy in strcture and function aspects. Result of Western blotting showed that the level of myosin A in spaceflight group decreased, further confirmed that atrophy happened during flight.

Objective:To investigate the effect of exercise rehabilitation on frailty of elderly patients with coronary heart disease after percutaneous coronary intervention (PCI) .Methods:From January to December 2021, 80 elderly patients with coronary heart disease who received PCI in Qinhuai Medical Area of General Hospital of Eastern Theater Command were selected as the study subject by convenience sampling. A total of 39 patients from January to June 2021 were set in the control group, and 41 patients from July to December 2021 were set in the experimental group. The control group was given routine nursing, and the experimental group was given systematic exercise rehabilitation on the basis of the control group. The effects of intervention were evaluated by Tilburg Frailty Index (FI) , Cardiac Exercise Self-Efficacy Instrument (CESEI) , cardiac function, exercise tolerance, and 6-minute Walking Distance (6MWD) .Results:There was no significant difference in FI and CESEI scores between the two groups before intervention ( P>0.05) . After intervention, the FI score of patients in the experimental group was lower than that in the control group, and the CESEI score was higher than that in the control group, with statistically significant differences ( P<0.05) . There was no significant difference in cardiac function, exercise tolerance and 6MWD between the two groups before intervention ( P>0.05) . After intervention, there were statistically significant differences in cardiac function, exercise tolerance and 6MWD between the two groups ( P<0.05) . Conclusions:Exercise rehabilitation can effectively alleviate the frailty of elderly patients with coronary heart disease after PCI, improve their exercise compliance, cardiac function and exercise tolerance, which is worthy of clinical promotion.

Objective:To analyze the research hotspots of the application of mobile health in cardiac function monitoring of patients with heart disease and to conduct a visual analysis.Method:Subject field retrieval was carried out based on Web of Science Core Collection. The retrieval time range was set from 2000 to 2022, and the type of paper was limited to treatise. The retrieved literatures were imported into Endnote 7 for screening, and the repetitive and unrelated literatures were excluded. A total of 291 literatures were included in this study. Open refine 2.8 was used for data cleaning of synonyms and then VOSviewer 1.6.18 was used for visualization analysis of country/region, author and keywords.Results:Research reports on the application of mobile medical in the field of cardiac function monitoring in patients with heart disease have been growing steadily since 2005, and the number of articles published in the field increased rapidly from 2020 to 2021. The top five countries with the highest number of publications were the United States (71) , Australia (20) , China (18) , the United Kingdom (14) and Sweden (13) . The cooperation and exchange among global researchers were relatively close, but they were still dominated by regional cooperation and had not formed a large core group of authors. A total of 71 high-frequency keywords were included, and the top five were mhealth (30 times) , heart failure (27 times) , smartphone (26 times) , telemedicine (15 times) and mobile phone (17 times) . Each cluster keyword was related to each other, which represented the current research hotspot content respectively.Conclusions:At present, number of publications in China ranks first in the world, but there is still a big gap compared with the United States. The development and optimization of monitoring equipment and mobile medical APP have become the focus and hot topics.