Background A large number of power supply workers are involved in live working and are exposed to multiple risk factors for long periods of time during outdoor work, which in turn causes occupational health problems. Objective To identify potential ergonomic factors related to work-related musculoskeletal disorders (WMSDs) and estimate the ergonomic risk of electricians. Methods A total of 31 workers were randomly selected from a training base under a power supply enterprise in Guangxi, and their operation processes were recorded by video. Using the Rapid Upper Limb Assessment (RULA) method, the workers were scored by the posture of their arms, neck, and torso during operation, and the final scores were summarized to assess their risk level. Two independent samples t-tests were used to compare the differences in RULA scores. Results A total of 31 videos for mounting/dismounting insulation mask and 29 videos for breaking/connecting contact terminal were collected. The RULA score for mounting/dismounting insulation mask was 6.6 ± 0.7 (left side) and 7.0 ± 0.2 (right side), most of the workers had a score of 7 (71.0% on the left side and 96.8% on the right side), and the upper limb and overall scores on the right side were higher than those on the left side (P < 0.05). The RULA score for breaking/connecting contact terminal was 6.9 ± 0.4 (both right and left sides), most of workers had a score of 7 (89.7% on the left side and 93.1% on the right side), and the difference of the overall scores between the right and left side for this operation were not statistically significant (P > 0.05). The ergonomic risk levels for both operations were level 3 or higher. Conclusion Mounting/dismounting insulation mask and breaking/connecting contact terminal are typical upper limb operations, and have a high level of ergonomics risk, requiring effective preventive and protective measures.

Objective: To constructCSF1R+/-mice and to analyze their genotypes, so as to provide animal model basis for disease pathological mechanism and drug target. Methods : A linearized targeting vector was designed according to Cre/Loxp system. A Loxp site was inserted upstream of the 5th exon of theCSF1Rgene, and a neomycin resistance box with Loxp sites on both sides was inserted downstream of the 5th exon. The linearized targeting vector was electroporated into embryonic stem cells. The correctly targeted embryonic stem cells were injected into the blastocysts of C57BL/6J mice to obtain chimeric mice, which were bred with Zp3-Cre mice. The newborn mice were numbered 9-14 days after birth and their tails were cut. The DNA of the mice was extracted, and the genotype of the mice was identified by polymerase chain reaction and agarose gel electrophoresis. The expression of CSF1R in mouse macrophages was detected by flow cytometry. The expression of CSF1R in mouse tissues was detected by Western blot. Results: The results of agarose gel electrophoresis showed that 453 bp bands were amplified in wild type mice, and 453 bp and 650 bp bands were amplified in heterozygous mice. The results of flow cytometry showed that the expression of CSF1R in peritoneal macrophages and bone marrow-derived macrophages of CSF1R heterozygous mice was lower than that of WT group(P<0.05). The results of Western blot showed that the expression of CSF1R in spleen, kidney and brain tissue of CSF1R heterozygous group was lower than that of WT group(P<0.05). Conclusion CSF1R+/-mice are successfully constructed, reproduced and identified, which provides an animal model basis for further revealing the potential mechanism of CSF1R in immune regulation.

Objective : To construct triggering receptor expressed on myeloid cells 2(TREM2) gene knockout(TREM2-/-) mice using CRISPR/Cas9 technology, to breed TREM2-/- mice and to analyze the genotype of TREM2-/- mice. Methods : CRISPR/Cas9 technology was used to selectively knock out exon 2-3 regions of TREM2 gene to construct a TREM2-/- mouse model, and the genetic background of all mice was C57BL/6J. Polymerase chain reaction(PCR) was used to identify the genotype of mice. Quantitative real-time PCR(qPCR) and Western blot were used to detect the expression level of TREM2 in major tissues of mice, and the authenticity and scientific nature of PCR identification results were verified from mRNA level and protein level. According to the sgRNA sequence, the possible off-target sites were predicted on the CCTop website, and the tail DNA of mice was extracted and amplified by PCR and then Sanger sequencing was performed to detect whether there was off-target effect in TREM2-/- mice. Results : TREM2-/- mice were successfully constructed by CRISPR/Cas9 technology, and the mice were genotyped. The results of agarose gel electrophoresis showed that the mouse genotype with only 415 bp band amplified was wild type(WT), the mouse genotype of the 449 bp band amplified only was TREM2-/-, and the mouse genotypes amplified with 415 bp and 449 bp double bands were heterozygous. qPCR results showed that compared with WT mice, the mRNA expression of TREM2 in heart and brain tissues of TREM2-/- mice was down-regulated(P-/- mice was reduced(P-/- mice. Conclusion TREM2-/- mice are successfully constructed and bred, a reliable genotype identification method is established, the genetic stability of the mouse model is verified, which will provide an important genetic animal model for the study of TREM2 gene function.

Rheumatoid arthritis (RA) is an autoimmune disease with a complex etiology. Monocyte-derived macrophages (MDMs) infiltration are associated with RA severity. We have reported the deletion of G-protein-coupled receptor kinase 2 (GRK2) reprograms macrophages toward an anti-inflammatory phenotype by recovering G-protein-coupled receptor signaling. However, as more GRK2-interacting proteins were discovered, the GRK2 interactome mechanisms in RA have been understudied. Thus, in the collagen-induced arthritis mouse model, we performed genetic GRK2 deletion using GRK2^f/fLyz2-Cre^+/- mice. Synovial inflammation and M1 polarization were improved in GRK2^f/fLyz2-Cre^+/- mice. Supporting experiments with RNA-seq and dual-luciferase reporter assays identified peroxisome proliferator-activated receptor γ (PPARγ) as a new GRK2-interacting protein. We further confirmed that fms-related tyrosine kinase 1 (Flt-1), which promoted macrophage migration to induce angiogenesis, was inhibited by GRK2-PPARγ signaling. Mechanistically, excess GRK2 membrane recruitment in CIA MDMs reduced the activation of PPARγ ligand-binding domain and enhanced Flt-1 transcription. Furthermore, the treatment of mice with GRK2 activity inhibitor resulted in significantly diminished CIA pathology, Flt-1⁺ macrophages induced-synovial inflammation, and angiogenesis. Altogether, we anticipate to facilitate the elucidation of previously unappreciated details of GRK2-specific intracellular signaling. Targeting GRK2 activity is a viable strategy to inhibit MDMs infiltration, affording a distinct way to control joint inflammation and angiogenesis of RA.

Objective:To review the relevant policies and progress of Shanghai in public hospital compensation,analyze the current situation and time series of the compensation situation of public hospitals in Shanghai,and propose policy suggestions to improve the compensation mechanism for public hospitals,so as to provide references for promoting high-quality development of public hospitals.Methods:Horizontal and longitudinal descriptive statistical analysis were conducted to compare the revenue,expenditure and salary data of public hospitals in Shanghai from 2018 to 2022.Results:Shanghai has gradually optimized the revenue and expenditure structure of public hospitals under the combined effects of removing markups on medical consumables and drugs,adjusting prices of medical services,centralizing volume-based procurement,and reforming the salary system.However,the rising proportion of medical material revenue and proportion of inspection and test revenue have occupied the growth space of medical service revenue,and the medical service income cannot fully compensate for personnel expenditure.Conclusion:It is suggested to further optimize the financial compensation method,optimize the adjustment mechanism of medical service prices,strengthen the refined operation and management of public hospitals,and improve supporting policies.

Objective:To review the relevant policies and progress of Shanghai in public hospital compensation,analyze the current situation and time series of the compensation situation of public hospitals in Shanghai,and propose policy suggestions to improve the compensation mechanism for public hospitals,so as to provide references for promoting high-quality development of public hospitals.Methods:Horizontal and longitudinal descriptive statistical analysis were conducted to compare the revenue,expenditure and salary data of public hospitals in Shanghai from 2018 to 2022.Results:Shanghai has gradually optimized the revenue and expenditure structure of public hospitals under the combined effects of removing markups on medical consumables and drugs,adjusting prices of medical services,centralizing volume-based procurement,and reforming the salary system.However,the rising proportion of medical material revenue and proportion of inspection and test revenue have occupied the growth space of medical service revenue,and the medical service income cannot fully compensate for personnel expenditure.Conclusion:It is suggested to further optimize the financial compensation method,optimize the adjustment mechanism of medical service prices,strengthen the refined operation and management of public hospitals,and improve supporting policies.

Objective:To review the relevant policies and progress of Shanghai in public hospital compensation,analyze the current situation and time series of the compensation situation of public hospitals in Shanghai,and propose policy suggestions to improve the compensation mechanism for public hospitals,so as to provide references for promoting high-quality development of public hospitals.Methods:Horizontal and longitudinal descriptive statistical analysis were conducted to compare the revenue,expenditure and salary data of public hospitals in Shanghai from 2018 to 2022.Results:Shanghai has gradually optimized the revenue and expenditure structure of public hospitals under the combined effects of removing markups on medical consumables and drugs,adjusting prices of medical services,centralizing volume-based procurement,and reforming the salary system.However,the rising proportion of medical material revenue and proportion of inspection and test revenue have occupied the growth space of medical service revenue,and the medical service income cannot fully compensate for personnel expenditure.Conclusion:It is suggested to further optimize the financial compensation method,optimize the adjustment mechanism of medical service prices,strengthen the refined operation and management of public hospitals,and improve supporting policies.

Objective:To review the relevant policies and progress of Shanghai in public hospital compensation,analyze the current situation and time series of the compensation situation of public hospitals in Shanghai,and propose policy suggestions to improve the compensation mechanism for public hospitals,so as to provide references for promoting high-quality development of public hospitals.Methods:Horizontal and longitudinal descriptive statistical analysis were conducted to compare the revenue,expenditure and salary data of public hospitals in Shanghai from 2018 to 2022.Results:Shanghai has gradually optimized the revenue and expenditure structure of public hospitals under the combined effects of removing markups on medical consumables and drugs,adjusting prices of medical services,centralizing volume-based procurement,and reforming the salary system.However,the rising proportion of medical material revenue and proportion of inspection and test revenue have occupied the growth space of medical service revenue,and the medical service income cannot fully compensate for personnel expenditure.Conclusion:It is suggested to further optimize the financial compensation method,optimize the adjustment mechanism of medical service prices,strengthen the refined operation and management of public hospitals,and improve supporting policies.

Objective:To review the relevant policies and progress of Shanghai in public hospital compensation,analyze the current situation and time series of the compensation situation of public hospitals in Shanghai,and propose policy suggestions to improve the compensation mechanism for public hospitals,so as to provide references for promoting high-quality development of public hospitals.Methods:Horizontal and longitudinal descriptive statistical analysis were conducted to compare the revenue,expenditure and salary data of public hospitals in Shanghai from 2018 to 2022.Results:Shanghai has gradually optimized the revenue and expenditure structure of public hospitals under the combined effects of removing markups on medical consumables and drugs,adjusting prices of medical services,centralizing volume-based procurement,and reforming the salary system.However,the rising proportion of medical material revenue and proportion of inspection and test revenue have occupied the growth space of medical service revenue,and the medical service income cannot fully compensate for personnel expenditure.Conclusion:It is suggested to further optimize the financial compensation method,optimize the adjustment mechanism of medical service prices,strengthen the refined operation and management of public hospitals,and improve supporting policies.

Objective:To review the relevant policies and progress of Shanghai in public hospital compensation,analyze the current situation and time series of the compensation situation of public hospitals in Shanghai,and propose policy suggestions to improve the compensation mechanism for public hospitals,so as to provide references for promoting high-quality development of public hospitals.Methods:Horizontal and longitudinal descriptive statistical analysis were conducted to compare the revenue,expenditure and salary data of public hospitals in Shanghai from 2018 to 2022.Results:Shanghai has gradually optimized the revenue and expenditure structure of public hospitals under the combined effects of removing markups on medical consumables and drugs,adjusting prices of medical services,centralizing volume-based procurement,and reforming the salary system.However,the rising proportion of medical material revenue and proportion of inspection and test revenue have occupied the growth space of medical service revenue,and the medical service income cannot fully compensate for personnel expenditure.Conclusion:It is suggested to further optimize the financial compensation method,optimize the adjustment mechanism of medical service prices,strengthen the refined operation and management of public hospitals,and improve supporting policies.