BACKGROUND:Compared with traditional two-dimensional culture,three-dimensional microtissue culture can show greater advantages.However,more favorable cultivation methods in three-dimensional culture still need to be further explored. OBJECTIVE:To evaluate the cell behavior of microtissue and its ability to promote cartilage formation under two three-dimensional culture methods. METHODS:Cartilage-derived microcarriers were prepared by chemical decellularization and tissue crushing.DNA quantification and nuclear staining were used to verify the success of decellularization,and histological staining was used to observe the matrix retention before and after decellularization.The microcarriers were characterized by scanning electron microscopy and CCK-8 assay.Cartilage-derived microtissues were constructed by combining cartilage-derived microcarriers with human adipose mesenchymal stem cells through three-dimensional static culture and three-dimensional dynamic culture methods.The cell viability and chondrogenic ability of the two groups of microtissues were detected by scanning electron microscopy,live and dead staining,and RT-qPCR. RESULTS AND CONCLUSION:(1)Cartilage-derived microcarriers were successfully prepared.Compared with before decellularization,the DNA content significantly decreased after decellularization(P<0.001).Scanning electron microscope observation showed that the surface of the microcarrier was surrounded by collagen,maintaining the characteristics of the natural extracellular matrix of cartilage cells.CCK-8 assay indicated that microcarriers had no cytotoxicity and could promote cell proliferation.(2)Scanning electron microscopy and live and dead staining results showed that compared with the three-dimensional static group,the three-dimensional dynamic group had a more extended morphology of microtissue cells,and extensive connections between cells and cells,between cells and matrix,and between matrix.(3)The results of RT-qPCR showed that the expressions of SOX9,proteoglycan,and type Ⅱ collagen in microtissues of both groups were increased at 7 or 14 days.The relative expression levels of each gene in the three-dimensional dynamic group were significantly higher than those in the three-dimensional static group at 14 days(P<0.05).At 21 days,the three-dimensional static group had significantly higher gene expression compared with the three-diomensional dynamic group(P<0.001).(4)The results showed that compared with three-dimensional static culture microtissue,three-dimensional dynamic culture microtissue could achieve higher expression of chondrogen-related genes in a shorter time,showing better cell viability and chondrogenic ability.

Objective:To investigate the prognosis of patients with initially resectable gastric cancer liver metastasis (GCLM) who were treated by different modalities, and analyze the influencing factors for prognosis of patients.Methods:The retrospective cohort study was conducted. The clinicopathological data of 327 patients with initially resectable GCLM who were included in the database of a nationwide multicenter retrospective cohort study on GCLM based on real-world data from January 2010 to December 2019 were collected. There were 267 males and 60 females, aged 61(54,68)years. According to the specific situations of patients, treatment modalities included radical surgery combined with systemic treatment, palliative surgery combined with systemic treatment, and systemic treatment alone. Observation indicators: (1) clinical characteristics of patients who were treated by different modalities; (2) prognostic outcomes of patients who were treated by different modalities; (3) analysis of influencing factors for prognosis of patients with initially resectable GCLM; (4) screening of potential beneficiaries in patients who were treated by radical surgery plus systemic treatment and patients who were treated by palliative surgery plus systemic treatment. Measurement data with normal distribution were represented as Mean± SD, and comparison between groups was conducted using the independent sample t test. Measurement data with skewed distribution were represented as M( Q1, Q3), and comparison between groups was conducted using the rank sum test. Count data were described as absolute numbers or percentages, and comparison between groups was conducted using the chi-square test. The Kaplan-Meier method was used to calculate survival rate and draw survival curve, and Log-Rank test was used for survival analysis. Univariate and multivariate analyses were conducted using the COX proportional hazard regression model. The propensity score matching was employed by the 1:1 nearest neighbor matching method with a caliper value of 0.1. The forest plots were utilized to evaluate potential benefits of diverse surgical combined with systemic treatments within the population. Results:(1) Clinical characteristics of patients who were treated by different modalities. Of 327 patients, there were 118 cases undergoing radical surgery plus systemic treatment, 164 cases undergoing palliative surgery plus systemic treatment, and 45 cases undergoing systemic treatment alone. There were significant differences in smoking, drinking, site of primary gastric tumor, diameter of primary gastric tumor, site of liver metastasis, and metastatic interval among the three groups of patients ( P<0.05). (2) Prognostic outcomes of patients who were treated by different modalities. The median overall survival time of the 327 pati-ents was 19.9 months (95% confidence interval as 14.9-24.9 months), with 1-, 3-year overall survival rate of 61.3%, 32.7%, respectively. The 1-year overall survival rates of patients undergoing radical surgery plus systemic treatment, palliative surgery plus systemic treatment and systemic treatment alone were 68.3%, 63.1%, 30.6%, and the 3-year overall survival rates were 41.1%, 29.9%, 11.9%, showing a significant difference in overall survival rate among the three groups of patients ( χ2=19.46, P<0.05). Results of further analysis showed that there was a significant difference in overall survival rate between patients undergoing radical surgery plus systemic treatment and patients undergoing systemic treatment alone ( hazard ratio=0.40, 95% confidence interval as 0.26-0.61, P<0.05), between patients undergoing palliative surgery plus systemic treatment and patients under-going systemic treatment alone ( hazard ratio=0.47, 95% confidence interval as 0.32-0.71, P<0.05). (3) Analysis of influencing factors for prognosis of patients with initially resectable GCLM. Results of multivariate analysis showed that the larger primary gastric tumor, poorly differentiated tumor, larger liver metastasis, multiple hepatic metastases were independent risk factors for prognosis of patients with initially resectable GCLM ( hazard ratio=1.20, 1.70, 1.20, 2.06, 95% confidence interval as 1.14-1.27, 1.25-2.31, 1.04-1.42, 1.45-2.92, P<0.05) and immunotherapy or targeted therapy, the treatment modality of radical or palliative surgery plus systemic therapy were independent protective factors for prognosis of patients with initially resectable GCLM ( hazard ratio=0.60, 0.39, 0.46, 95% confidence interval as 0.42-0.87, 0.25-0.60, 0.30-0.70, P<0.05). (4) Screening of potentinal beneficiaries in patients who were treated by radical surgery plus systemic treatment and patients who were treated by palliative surgery plus systemic treatment. Results of forest plots analysis showed that for patients with high-moderate differentiated GCLM and patients with liver metastasis located in the left liver, the overall survival rate of patients undergoing radical surgery plus systemic treatment was better than patients undergoing palliative surgery plus systemic treatment ( hazard ratio=0.21, 0.42, 95% confidence interval as 0.09-0.48, 0.23-0.78, P<0.05). Conclusions:Compared to systemic therapy alone, both radical and palliative surgery plus systemic therapy can improve the pro-gnosis of patients with initially resectable GCLM. The larger primary gastric tumor, poorly differen-tiated tumor, larger liver metastasis, multiple hepatic metastases are independent risk factors for prognosis of patients with initial resectable GCLM and immunotherapy or targeted therapy, the treatment modality of radical or palliative surgery plus systemic therapy are independent protective factors for prognosis of patients with initially resectable GCLM.

OBJECTIVE To evaluate the global cancer-associated thromboembolism risk assessment tools based on evidence- based methods， and to provide methodological reference and evidence-based basis for constructing a specific tool in China. METHODS A comprehensive search was conducted on 6 databases， including CNKI， Wanfang data， VIP， CBM， PubMed， and Embase， as well as on the websites of NCCN， ASCO， ESMO and so on with a deadline of June 30， 2022. Furthermore， a supplementary search was conducted in January 2023. The essential characteristics and methodological quality of included risk assessment tools were described and analyzed qualitatively， focusing on comparing each assessment stratification ability. RESULTS Totally 14 risk assessment tools were included in the study， with a sample size of 208-18 956 cases and an average age distribution of 53.1-74.0 years. The applicable population included outpatient cancer student@sina.com patients， lymphoma patients， and multiple myeloma patients，etc. The common predictive factors were body mass index， venous thromboembolism history， and tumor site. All tools had undergone methodological validation， with 9 presented in a weighted scoring format. Only seven tools were used simultaneously for specificity， sensitivity， negative predictive value （NPV）， positive predictive value （PPV） and area under the curve （AUC） or C statistical analysis. CONCLUSIONS The risk of bias in constructing existing tools is high， and the heterogeneity of tool validation results is significant. The overall methodological quality must be improved， and its risk stratification ability must also be investigated. There are still certain limitations in clinical practice in China.

ObjectiveTo analyze the spectrum distribution characteristics of high-intensity productive noise in key industries in Guangdong Province. Methods A total of 2 806 enterprises in 21 prefecture-level cities in Guangdong Province were selected as the study subjects using the stratified sampling method. On-site investigations were conducted in workplaces. Noise in workplaces and work-sites, and the noise spectrum of the workplaces with sound pressure level ≥85.0 dB(A) were detected. Results The noise of a total of 23 076 workplaces and 20 969 work sites from 30 key industries were monitored. The median (M) and 25th and 75th percentiles (P₂₅, P₇₅) of workplace sound pressure level were 82.3 (78.6, 86.5) dB(A). The rate of the noise exceeded national standard was 30.4%. The sound pressure level M (P₂₅, P₇₅) of work-site was 78.6 (70.0, 83.5) dB(A). The rate of the noise exceeded national standard was 18.0%. Workplace noise and work site noise were positively correlated (Spearman correlation coefficient=0.86, P<0.01). The rate of the noise exceeded national standard was 46.5% in key work sites where the rate of noise exceeded the national standard was ≥25.0%, and corresponding rate of the workplace noise exceeded national standard was 58.1%. The noise spectrum result of 5 636 workplaces sound pressure level>85.0 dB(A) showed that most of the noise source was from grinding machines (441 cases), and the highest average sound pressure level of noise source was from screening machines [93.0 dB(A)]. Cluster analysis results showed that the main noise sources could be divided into three categories, including wideband noise with levels >80.0 dB in all frequency bands except 8 000.0 Hz, medium-high-frequency noise with the highest sound pressure level at 1 000.0, 2 000.0, and 4 000.0 Hz and low frequencies <75.0 dB, and medium-low-frequency noise below 500.0 Hz with sound pressure level >85.0 dB. Conclusion The rate of the noise exceeded national standard in workplace of key industries in Guangdong Province is high, involving a wide range of industries, with high sound pressure levels and obvious spectrum characteristics of corresponding noise sources. Corresponding noise control strategies can be formulated based on different spectrum characteristics and magnitudes.

Objective:To explore the clinical application value of magnetic stimulation combined with biofeed-back technology in female stress urinary incontinence(SUI).Methods:Sixty mild or moderate female SUI patients who underwent rehabilitation treatment at the Pelvic Floor Rehabilitation Center of Nanjing Women and Children's Healthcare Hospital from July to December 2021 were collected and randomly divided into two groups,with 30 pa-tients in each group.The observation group received a treatment protocol of electrical stimulation+biofeedback therapy(electric combined group)and the other group received a treatment protocol of magnetic stimulation+bi-ofeedback therapy(magnetic combined group).The treatment course for both groups consisted of 12 sessions.The Sandvik severity Index(urinary incontinence),the amount of u 1-hoururine leakage,pelvic floor muscle strength,pelvic floor muscle electrophysiological indices,the degree of urinary incontinence impact(ⅡQ-7 score)and the treatment efficacy were assessed and compared before and after the treatment in the two groups.Re-sults:Compared with the pre-treatment,the Sandvik Severity Index,the 1-hour urine leakage,and the n Q-7 score decreased in the magnetic combined group and the electric combined group after treatment,while the mus-cle strength of type Ⅰ,type Ⅱ,maximum of fast muscle,and mean value of slow muscle increased significantly,and the differences were statistically significant(P＜0.05).The difference between the above indexes was not statistically significant when comparing the magnetic combined group and the electric combined group after treat-ment(P＞0.05),and the treatment efficiency of the electric combined group was 93.33％and that of the magnet-ic combined group was 96.67％,and there was no statistical significance when comparing the efficiency of the two groups(P＞0.05).Conclusions:Magnetic stimulation combined with biofeedback technology has high thera-peutic efficiency for mild or moderate SUl,and is an optional rehabilitation technique for women with SUI.

Objective:To explore the clinical application value of magnetic stimulation combined with biofeed-back technology in female stress urinary incontinence(SUI).Methods:Sixty mild or moderate female SUI patients who underwent rehabilitation treatment at the Pelvic Floor Rehabilitation Center of Nanjing Women and Children's Healthcare Hospital from July to December 2021 were collected and randomly divided into two groups,with 30 pa-tients in each group.The observation group received a treatment protocol of electrical stimulation+biofeedback therapy(electric combined group)and the other group received a treatment protocol of magnetic stimulation+bi-ofeedback therapy(magnetic combined group).The treatment course for both groups consisted of 12 sessions.The Sandvik severity Index(urinary incontinence),the amount of u 1-hoururine leakage,pelvic floor muscle strength,pelvic floor muscle electrophysiological indices,the degree of urinary incontinence impact(ⅡQ-7 score)and the treatment efficacy were assessed and compared before and after the treatment in the two groups.Re-sults:Compared with the pre-treatment,the Sandvik Severity Index,the 1-hour urine leakage,and the n Q-7 score decreased in the magnetic combined group and the electric combined group after treatment,while the mus-cle strength of type Ⅰ,type Ⅱ,maximum of fast muscle,and mean value of slow muscle increased significantly,and the differences were statistically significant(P＜0.05).The difference between the above indexes was not statistically significant when comparing the magnetic combined group and the electric combined group after treat-ment(P＞0.05),and the treatment efficiency of the electric combined group was 93.33％and that of the magnet-ic combined group was 96.67％,and there was no statistical significance when comparing the efficiency of the two groups(P＞0.05).Conclusions:Magnetic stimulation combined with biofeedback technology has high thera-peutic efficiency for mild or moderate SUl,and is an optional rehabilitation technique for women with SUI.

Objective:To explore the clinical application value of magnetic stimulation combined with biofeed-back technology in female stress urinary incontinence(SUI).Methods:Sixty mild or moderate female SUI patients who underwent rehabilitation treatment at the Pelvic Floor Rehabilitation Center of Nanjing Women and Children's Healthcare Hospital from July to December 2021 were collected and randomly divided into two groups,with 30 pa-tients in each group.The observation group received a treatment protocol of electrical stimulation+biofeedback therapy(electric combined group)and the other group received a treatment protocol of magnetic stimulation+bi-ofeedback therapy(magnetic combined group).The treatment course for both groups consisted of 12 sessions.The Sandvik severity Index(urinary incontinence),the amount of u 1-hoururine leakage,pelvic floor muscle strength,pelvic floor muscle electrophysiological indices,the degree of urinary incontinence impact(ⅡQ-7 score)and the treatment efficacy were assessed and compared before and after the treatment in the two groups.Re-sults:Compared with the pre-treatment,the Sandvik Severity Index,the 1-hour urine leakage,and the n Q-7 score decreased in the magnetic combined group and the electric combined group after treatment,while the mus-cle strength of type Ⅰ,type Ⅱ,maximum of fast muscle,and mean value of slow muscle increased significantly,and the differences were statistically significant(P＜0.05).The difference between the above indexes was not statistically significant when comparing the magnetic combined group and the electric combined group after treat-ment(P＞0.05),and the treatment efficiency of the electric combined group was 93.33％and that of the magnet-ic combined group was 96.67％,and there was no statistical significance when comparing the efficiency of the two groups(P＞0.05).Conclusions:Magnetic stimulation combined with biofeedback technology has high thera-peutic efficiency for mild or moderate SUl,and is an optional rehabilitation technique for women with SUI.

Objective:To explore the clinical application value of magnetic stimulation combined with biofeed-back technology in female stress urinary incontinence(SUI).Methods:Sixty mild or moderate female SUI patients who underwent rehabilitation treatment at the Pelvic Floor Rehabilitation Center of Nanjing Women and Children's Healthcare Hospital from July to December 2021 were collected and randomly divided into two groups,with 30 pa-tients in each group.The observation group received a treatment protocol of electrical stimulation+biofeedback therapy(electric combined group)and the other group received a treatment protocol of magnetic stimulation+bi-ofeedback therapy(magnetic combined group).The treatment course for both groups consisted of 12 sessions.The Sandvik severity Index(urinary incontinence),the amount of u 1-hoururine leakage,pelvic floor muscle strength,pelvic floor muscle electrophysiological indices,the degree of urinary incontinence impact(ⅡQ-7 score)and the treatment efficacy were assessed and compared before and after the treatment in the two groups.Re-sults:Compared with the pre-treatment,the Sandvik Severity Index,the 1-hour urine leakage,and the n Q-7 score decreased in the magnetic combined group and the electric combined group after treatment,while the mus-cle strength of type Ⅰ,type Ⅱ,maximum of fast muscle,and mean value of slow muscle increased significantly,and the differences were statistically significant(P＜0.05).The difference between the above indexes was not statistically significant when comparing the magnetic combined group and the electric combined group after treat-ment(P＞0.05),and the treatment efficiency of the electric combined group was 93.33％and that of the magnet-ic combined group was 96.67％,and there was no statistical significance when comparing the efficiency of the two groups(P＞0.05).Conclusions:Magnetic stimulation combined with biofeedback technology has high thera-peutic efficiency for mild or moderate SUl,and is an optional rehabilitation technique for women with SUI.

Objective:To explore the clinical application value of magnetic stimulation combined with biofeed-back technology in female stress urinary incontinence(SUI).Methods:Sixty mild or moderate female SUI patients who underwent rehabilitation treatment at the Pelvic Floor Rehabilitation Center of Nanjing Women and Children's Healthcare Hospital from July to December 2021 were collected and randomly divided into two groups,with 30 pa-tients in each group.The observation group received a treatment protocol of electrical stimulation+biofeedback therapy(electric combined group)and the other group received a treatment protocol of magnetic stimulation+bi-ofeedback therapy(magnetic combined group).The treatment course for both groups consisted of 12 sessions.The Sandvik severity Index(urinary incontinence),the amount of u 1-hoururine leakage,pelvic floor muscle strength,pelvic floor muscle electrophysiological indices,the degree of urinary incontinence impact(ⅡQ-7 score)and the treatment efficacy were assessed and compared before and after the treatment in the two groups.Re-sults:Compared with the pre-treatment,the Sandvik Severity Index,the 1-hour urine leakage,and the n Q-7 score decreased in the magnetic combined group and the electric combined group after treatment,while the mus-cle strength of type Ⅰ,type Ⅱ,maximum of fast muscle,and mean value of slow muscle increased significantly,and the differences were statistically significant(P＜0.05).The difference between the above indexes was not statistically significant when comparing the magnetic combined group and the electric combined group after treat-ment(P＞0.05),and the treatment efficiency of the electric combined group was 93.33％and that of the magnet-ic combined group was 96.67％,and there was no statistical significance when comparing the efficiency of the two groups(P＞0.05).Conclusions:Magnetic stimulation combined with biofeedback technology has high thera-peutic efficiency for mild or moderate SUl,and is an optional rehabilitation technique for women with SUI.

Objective:To explore the clinical application value of magnetic stimulation combined with biofeed-back technology in female stress urinary incontinence(SUI).Methods:Sixty mild or moderate female SUI patients who underwent rehabilitation treatment at the Pelvic Floor Rehabilitation Center of Nanjing Women and Children's Healthcare Hospital from July to December 2021 were collected and randomly divided into two groups,with 30 pa-tients in each group.The observation group received a treatment protocol of electrical stimulation+biofeedback therapy(electric combined group)and the other group received a treatment protocol of magnetic stimulation+bi-ofeedback therapy(magnetic combined group).The treatment course for both groups consisted of 12 sessions.The Sandvik severity Index(urinary incontinence),the amount of u 1-hoururine leakage,pelvic floor muscle strength,pelvic floor muscle electrophysiological indices,the degree of urinary incontinence impact(ⅡQ-7 score)and the treatment efficacy were assessed and compared before and after the treatment in the two groups.Re-sults:Compared with the pre-treatment,the Sandvik Severity Index,the 1-hour urine leakage,and the n Q-7 score decreased in the magnetic combined group and the electric combined group after treatment,while the mus-cle strength of type Ⅰ,type Ⅱ,maximum of fast muscle,and mean value of slow muscle increased significantly,and the differences were statistically significant(P＜0.05).The difference between the above indexes was not statistically significant when comparing the magnetic combined group and the electric combined group after treat-ment(P＞0.05),and the treatment efficiency of the electric combined group was 93.33％and that of the magnet-ic combined group was 96.67％,and there was no statistical significance when comparing the efficiency of the two groups(P＞0.05).Conclusions:Magnetic stimulation combined with biofeedback technology has high thera-peutic efficiency for mild or moderate SUl,and is an optional rehabilitation technique for women with SUI.