A reporter gene assays for bioactivity determination of human chorinonic gonadotropin / 药学学报

This study constructed a LHCGR-CRE-luc-HEK293 transgenic cell line according to the activation of the cAMP signaling pathway after recombinant human chorionic gonadotropin binding to the receptor. The biological activity of recombinant human chorionic gonadotropin was assayed using a luciferase assay system. The relative potency of the samples was calculated using four-parameter model. And the method conditions were optimized to validate the specificity, relative accuracy, precision and linearity of the method. The results showed that there was a quantitative potency relationship of human chorinonic gonadotropin (hCG) in the method and it was in accordance with the four-parameter curve. After optimization, the conditions were determined as hCG dilution concentration of 2.5 μg·mL-1, dilution ratio of 1∶4, cell number of 10 000-15 000 cells/well, and induction time of 6 h. The method had good specificity, relative accuracy with relative bias ranging from -8.9% to 3.4%, linear regression equation correlation coefficient of 0.996, intermediate precision geometric coefficient of variation ranging from 3.3% to 15.0%, and linearity range of 50% to 200%. This study successfully established and validated a reporter gene method to detect hCG biological activity, which can be used for hCG biological activity assay and quality control.

Ligustilide delays senescence of auditory cortex in mice by inhibiting ferritinophagy / 中国药理学通报

Aim To investigate the mechanism of ligu aged 2 months of the same strain were used as the constilide (LIG) in delaying the senescence of auditory trol (Ctrl) group. Auditory brainstem response test was cortex and treating central presbycusis. Methods used to detect the auditory threshold of mice before and Forty C57BL/6J mice aged 13 months were randomly di after treatment. Levels of serum MDA and activity of vided into ligustilide low-dose(L-LIG) group, ligustil serum SOD were detected to display the level of oxidative ide medium-dose (M-LIG) group, ligustilide high-dose stress. The pathological changes of auditory cortex were (H-LIG) group and aging (Age) group, and 10 mice observed by HE staining. Ferroptosis was observed by

Ginsenoside Rg1 injection combined with inosine tablets and vitamin B1 for the treatment of primary retinitis pigmentosa / 国际眼科杂志(Guoji Yanke Zazhi)

AIM: To investigate the effects of ginsenoside Rg1 injection combined with inosine tablets and vitamin B1 on serum brain-derived neurotrophic factor(BDNF), pituitary adenylate cyclase activating polypeptide(PACAP)and clinical efficacy in primary retinitis pigmentosa.METHODS: A total of 50 patients(100 eyes)with primary retinitis pigmentosa who admitted to the Department of Ophthalmology, the Second Affiliated Hospital of Hebei North University from August 2019 to March 2022 were selected as the research object. They were divided into the study group and the control group according to random number table, with 50 eyes in each group. Patients in the control group were treated with inosine tablets and vitamin B1, while patients in the study group were treated with ginsenoside Rg1 injection on the basis of the control group. The expression of BDNF and PACAP in serum, electroretinogram and spectral-domain optical coherence tomography(SD-OCT)were compared before and after treatment, and the retinal thickness(RT), mean deviation(MD), clinical efficacy and safety indexes were compared between the two groups.RESULTS: There were no differences in the MD of the two groups before treatment(t=1.670, P=0.098), while the MD of the study group was significantly lower than that of the control group after treatment(t=3.628, P<0.01). Before treatment, RT with a diameter of 1mm at the circle of macular fovea was compared between the two groups(t=0.108, P=0.914), it was significantly higher than that in the control group after treatment(t=6.125, P<0.01). Before treatment, there was no significant difference in the results of dark adaptation of electroretinogram between the two groups(all P>0.05). After treatment, the results of dark adaptation in the study group were significantly better than those in the control group(all P<0.01). Before treatment, there was no significant difference in the results of electroretinogram adaptation between the two groups(all P>0.05). After treatment, the results of electroretinogram adaptation in the study group were significantly better than those in the control group(all P<0.01). There was no significant difference in BDNF and PACAP between the two groups before treatment(all P>0.05). BDNF and PACAP in the study group were higher than those of the control group after treatment(all P<0.01). After treatment, no adverse reactions were observed in both groups.CONCLUSION: The treatment of patients with primary retinitis pigmentosa with ginsenoside will improve the retinal function and promote the prognosis of the disease by regulating the expression of BDNF and PACAP, and it is highly safe.

Protective effect of salvianolic acid B on retina and its influence on angiogenesis in retinal vein occlusion injured rat model / 国际眼科杂志(Guoji Yanke Zazhi)

AIM: To investigate the protective effect of salvianolic acid B on retina and its influence on angiogenesis in retinal vein occlusion(RVO)injured rats.METHODS: SD rats were randomly divided into control group, model group and salvianolic acid B group, with 10 rats in each group. In addition to the control group, rats in model group and salvianolic acid B group were induced RVO by Bengal red combined with laser photodynamic method. The rats in salvianolic acid B group were intraperitoneally injected with salvianolic acid B 50 mg/(kg·d), while the rats in control group and model group were only given the same amount of normal saline for 21 consecutive days. Fundus fluorescein angiography(FFA)was used to observe the retinal vein structure before and after administration. HE staining was used to observe the pathological changes of rat retina. The retinal function of rats was evaluated by electroretinogram(ERG). The fluorescence expression of vascular endothelial growth factor A(VEGFA)in retina of rats in each group was detected by immunofluorescence staining. The relative expression of HIF-1α, STAT3, p-STAT3 and VEGFA proteins in retinal tissue were detected by Western blotting.RESULTS: Compared with the control group, the blood flow at the retinal obstruction in the model group was recanalized, and the effective collateral circulation was abundant, but the shape was irregular, and there was fluorescence leakage. In salvianolic acid B group, the retinal vein circulation recovered, the shape became regular gradually, and the collateral vessels decreased. The retina of the model group and salvianolic acid B group showed different degrees of pathological damage. At the same time, the amplitude of ERG a wave and b wave, the thickness of retinal total layer(RTL), inner nuclear layer(INL)and outer nuclear layer(ONL)decreased, the fluorescence intensity of VEGFA enhanced, and the relative expression of HIF-1α, p-STAT3 and VEGFA protein increased(P<0.05). Compared with the model group, the retinal histopathological damage of salvianolic acid B rats was alleviated, the amplitude of ERG a-wave and b-wave, the thickness of RTL, INL and ONL were increased, the fluorescence intensity of VEGFA was weakened, and the relative expression of HIF-1α, p-STAT3 and VEGFA proteins was decreased(P<0.05).CONCLUSION: Salvianolic acid B can alleviate the retinal histopathological injury and improve retinal function in RVO rats, which may be related to inhibiting the activation of HIF-1α/STAT3/VEGFA pathway and reducing angiogenesis.

Clinical features of TFE3-rearranged renal cell carcinoma / 中华泌尿外科杂志

Objective:A single-center analysis was performed to assess the significant clinical features and prognostic factors of TFE3-rearranged renal cell carcinoma (TFE3 rRCC).Methods:The clinical data of 85 confirmed cases of TFE3 rRCC patients at the Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University from January 2007 to February 2023 were analyzed retrospectively. Among these patients, there were 39 males and 46 females, with a median age of 32 (26, 45) years. All patients underwent preoperative CT scans, 21/85 cases (24.7%) of TFE3 rRCC exhibited the characteristic feature of "circular calcification" with plain CT imaging, and enhanced CT scan showed that the tumor enhancement during the arterial phase was lower than the adjacent renal cortex. Among the 85 patients in this cohort, the median tumor diameter was 4.8(3.2, 6.5). Thirty-two patients underwent partial nephrectomy (NSS), while 51 patients underwent radical nephrectomy (RN). Two patients with distant metastasis at the time of diagnosis received only sunitinib therapy. Forty-three patients received adjuvant treatment, including 14 patients who received targeted therapy. There were 29 patients in AJCC stage Ⅲ/Ⅳ, with 10 patients presenting with venous tumor thrombus and 14 patients with lymph node metastasis. Histopathology, TFE3 immunohistochemistry, and break-apart TFE3 FISH probe detection were performed on all 85 cases, while 52 patients underwent RT-PCR and/or DNA sequencing. By combining the clinical and pathological data, we summarized the diagnostic Methods for TFE3 rRCC, evaluated the impact of surgical approaches (RN and NSS) on the survival outcomes of cT 1a/b patients, and assessed the influence of genetic subtypes (ASPL, NONO, PRCC, SFPQ, and others) on the survival outcomes of all patients. Furthermore, we analyzed the risk factors for disease progression. Results:TFE3 rRCC exhibited variable histopathological features, and the presence of acinar-like structures with psammoma bodies may be a relatively typical characteristic. All 85 patients showed positive TFE3 immunohistochemical staining. In 6 cases of TFE3 rRCC, break-apart TFE3 FISH probe yielded negative results. However, final confirmation was achieved through genetic sequence, with 5 cases diagnosed as NONO-TFE3 subtype and 1 case as RBM10-TFE3 subtype. Among the 85 patients, 52 underwent RT-PCR and/or DNA sequencing, revealing a total of 8 TFE3 fusion subtypes, including 11 cases of ASPL-TFE3, 8 cases of PRCC-TFE3, 10 cases of NONO-TFE3, 15 cases of SFPQ-TFE3, 1 case of CLTC-TFE3, 2 cases of LUC7L3-TFE3, 4 cases of MED15-TFE3, and 1 case of RBM10-TFE3. The survival analysis results revealed that among the 12 patients with cT 1b stage tumors who underwent radical nephrectomy (RN), the progression-free survival (PFS) was 35 (14, 109) months, which was significantly better than the NSS group ( P=0.041). However, for the 14 patients with cT 1a stage tumors who underwent RN, there was no statistically significant difference in overall survival (OS) and PFS compared to the NSS group, with OS being 55(27, 134) months and PFS being 71(41, 134) months. Stratifying according to TFE3 fusion subtypes, it was found that patients with ASPL-TFE3 fusion had a significantly lower PFS compared to those with non-ASPL-TFE3 fusion subtypes ( P=0.029). Survival analysis revealed that tumor diameter, surgical approach, adjuvant therapy, AJCC staging, venous tumor thrombus, and lymph node metastasis were associated with OS and PFS( P<0.05). The results of the multivariate Cox regression analysis showed that AJCC stage Ⅲ/Ⅳ( HR=2.393, 95% CI 1.418-4.039, P=0.001) and venous tumor thrombus ( HR=3.543, 95% CI 1.159-10.827, P=0.026) were independent risk factors for progression-free survival (PFS). Conclusions:During the non-enhanced phase of CT scan, TFE3 rRCC tumors can exhibit a circular calcification. TFE3 immunohistochemistry is an important screening method for TFE3 rRCC.Break-apart TFE3 FISH probe detection is considered the diagnostic gold standard, and gene sequencing, if feasible, can provide the subtype diagnosis of TFE3 rRCC. For cT 1a stage TFE3 rRCC, partial nephrectomy (NSS) is a viable option, while caution should be taken in selecting NSS for cT1b stage patients. Patients with ASPL-TFE3 fusion subtype have a worse prognosis. AJCC stage Ⅲ/Ⅳ and venous tumor thrombus indicate poor prognosis in TFE3 rRCC.

Analysis of family mutation type and two-hit hypothesis of a familial VHL Syndrome patient / 现代泌尿外科杂志

【Objective】 To explore the mutation type, clinical characteristics, molecular genetics and the two-hit type of a patient with familial Von Hippel Lindau (VHL) syndrome. 【Methods】 The data of the patient were collected. DNA was extracted from the peripheral blood and renal cell carcinoma sample. The VHL gene germline mutation site was detected with high throughput sequencing next generation sequencing (NGS). The two-hit site was identified with UCSCXena database, methylation-specific PCR (MSP) and microsatellite stability detection. 【Results】 The mutation site of the embryo line was located in c.500G>A R167Q mutation. The patient had single nucleotide polymorphism, but no clear loss of heterozygosity, methylation or system mutation. 【Conclusion】 The germline mutation in exon 3 is the basis for the clinical features of this familial renal cell carcinoma proband. The identification of the two-hit site is key to the occurrence of the disease, which is significant for the diagnosis and treatment. The use of the databases can guide the screening of mutations and methylation sites in familial renal cell carcinoma.

Electroacupuncture alleviates postoperative pain through inhibiting neuroinflammation via stimulator of interferon genes/type-1 interferon pathway / 中西医结合学报

OBJECTIVE@#This work explores the impact of electroacupuncture (EA) on acute postoperative pain (APP) and the role of stimulator of interferon genes/type-1 interferon (STING/IFN-1) signaling pathway modulation in the analgesic effect of EA in APP rats.@*METHODS@#The APP rat model was initiated through abdominal surgery and the animals received two 30 min sessions of EA at bilateral ST36 (Zusanli) and SP6 (Sanyinjiao) acupoints. Mechanical, thermal and cold sensitivity tests were performed to measure the pain threshold, and electroencephalograms were recorded in the primary somatosensory cortex to identify the effects of EA treatment on APP. Western blotting and immunofluorescence were used to examine the expression and distribution of proteins in the STING/IFN-1 pathway as well as neuroinflammation. A STING inhibitor (C-176) was administered intrathecally to verify its role in EA.@*RESULTS@#APP rats displayed mechanical and thermal hypersensitivities compared to the control group (P < 0.05). APP significantly reduced the amplitude of θ, α and γ oscillations compared to their baseline values (P < 0.05). Interestingly, expression levels of proteins in the STING/IFN-1 pathway were downregulated after inducing APP (P < 0.05). Further, APP increased pro-inflammatory factors, including interleukin-6, tumor necrosis factor-α and inducible nitric oxide synthase, and downregulated anti-inflammatory factors, including interleukin-10 and arginase-1 (P < 0.05). EA effectively attenuated APP-induced painful hypersensitivities (P < 0.05) and restored the θ, α and γ power in APP rats (P < 0.05). Meanwhile, EA distinctly activated the STING/IFN-1 pathway and mitigated the neuroinflammatory response (P < 0.05). Furthermore, STING/IFN-1 was predominantly expressed in isolectin-B4- or calcitonin-gene-related-peptide-labeled dorsal root ganglion neurons and superficial laminae of the spinal dorsal horn. Inhibition of the STING/IFN-1 pathway by intrathecal injection of C-176 weakened the analgesic and anti-inflammatory effects of EA on APP (P < 0.05).@*CONCLUSION@#EA can generate robust analgesic and anti-inflammatory effects on APP, and these effects may be linked to activating the STING/IFN-1 pathway, suggesting that STING/IFN-1 may be a target for relieving APP. Please cite this article as: Ding YY, Xu F, Wang YF, Han LL, Huang SQ, Zhao S, Ma LL, Zhang TH, Zhao WJ, Chen XD. Electroacupuncture alleviates postoperative pain through inhibiting neuroinflammation via stimulator of interferon genes/type-1 interferon pathway. J Integr Med. 2023; 21(5): 496-508.

Research progress of optical motion capture technology in shoulder biomechanics / 中国骨伤

The shoulder joint is the most flexible joint in the body with the largest range of motion, and the movement pattern is more complex. Accurate capture of three-dimensional motion data of the shoulder joint is crucial for biomechanical evaluation. Optical motion capture systems offer a non-invasive and radiation-free method to capture shoulder joint motion data during complex movements, enabling further biomechanical analysis of the shoulder joint. This review provides a comprehensive overview of optical motion capture technology in the context of shoulder joint movement, including measurement principles, data processing methods to reduce artifacts from skin and soft tissues, factors influencing measurement results, and applications in shoulder joint disorders.

Mechanism of heat-clearing prescriptions in alleviating type 2 diabetes mellitus:a review / 中国中药杂志

Type 2 diabetes mellitus(T2DM), a common chronic metabolic disease, is often accompanied by internal heat syndrome. Heat-clearing prescriptions are widely used to treat different heat syndromes of T2DM from the aspects of clearing stagnant heat, excess heat, damp heat, phlegm heat, and heat toxin, demonstrating remarkable effects. The mechanism of blood sugar-lowering agents has always been a hotspot of research. Recently, the basic studies of heat-clearing prescriptions from different perspectives have been increasing year by year. To clarify the mechanisms of heat-clearing prescriptions and find specific mechanisms, we systematically reviewed the basic studies of heat-clearing prescriptions commonly used for the treatment of T2DM in the past decade, intending to provide a reference for related research.

Progress in arthroscopic surgery for injury of superior labrum anterior posterior of shoulder joint / 中国骨伤

Superior labrum anterior posterior (SLAP) injury is a major challenge for orthopedic surgeons, due to the poor healing ability of the injured labrum. Although arthroscopic surgery is the gold standard for the treatment of SLAP injury, there are still disputes about the adaptation of different surgical techniques, the choice of anchors during operation, knotted or knotless anchors, and fixation methods. The authors believe that arthroscopic repair of SLAP lesions is effective for young patients with intact glenoid labrum(<35 years old) or with extensive activity, where single and knotless anchor is preferred. For the older patients(≥35 years old) with degeneration and wear of glenoid labrum, biceps tenodesis is more preferable, and interference screw fixation technique is recommended. As for patients with failed SLAP repair, biceps tenodesis can achieve a high success rate as a revision surgery. By review of the relevant literature in recent years, this paper summarizes the adaptation of different surgical methods of arthroscopic treatment of SLAP injury, intraoperative anchoring techniques, fixation methods and other improved surgical techniques.

A case of dimethylformamide poisoning caused by skin contact / 中华劳动卫生职业病杂志

In this paper, the clinical data of a case of accidental poisoning of dimethylformamide in a traffic accident was analyzed. The patient was trapped in the driving room, his limbs were soaked in dimethylformamide for a long time, and dimethylformamide was inhaled at the same time. After 4 days of treatment in a local hospital, he was transferred to the Department of Poisoning & Occupational Diseases, Emergency Medicine of Qilu Hospital of Shandong University for treatment. The main clinical manifestation of the patient was liver damage and intractable abdominal pain, which was cured by active treatment.

Clinical characteristics of acute occupational poisoning caused by carbon dioxide leakage from a cargo ship / 中华劳动卫生职业病杂志

Carbon dioxide is a simple asphyxial gas, with low concentrations having an excitatory effect on the respiratory center, while high concentrations have an inhibitory effect on the respiratory center. Simple carbon dioxide poisoning is rarely seen clinically. This article reviews and analyzes the treatment process of 9 cases of acute inhalation carbon dioxide poisoning in a cargo ship carbon dioxide leakage accident in May 2019, summarizes clinical treatment experience, and provides timely and effective treatment for acute pulmonary edema caused by acute inhalation carbon dioxide poisoning. In particular, the application of hormones has a good prognosis, improving clinicians' understanding of the disease.

Clinical and genetic characteristic in patients with disorders of sex development caused by Y chromosome copy number variant / 中华儿科杂志

Objective: To investigate the clinical phenotype and genetic characteristics of disorders of sex development (DSD) caused by Y chromosome copy number variant (CNV). Methods: A retrospective analysis was performed on 3 patients diagnosed with DSD caused by Y chromosome CNV admitted to the First Affiliated Hospital of Zhengzhou University from January, 2018 to September, 2022. Clinical data were collected. Clinical study and genetic test were performed by karyotyping, whole exome sequencing (WES), low coverage whole genome copy number variant sequencing (CNV-seq), fluorescence in situ hybridization (FISH) and gonadal biopsy. Results: The 3 children, aged 12, 9, 9 years, the social gender were all female, presented with short stature, gonadal dysplasia and normal female external genital. No other phenotypic abnormality was found except for case 1 with scoliosis. The karyotype of all cases were identified as 46, XY. No pathogenic vraiants were found by WES. CNV-seq determined that case 1 was 47, XYY,+Y(2.12) and case 2 was 46, XY,+Y(1.6). FISH concluded that the long arm of Y chromosome was broken and recombined near Yq11.2, and then produced a pseudodicentric chromosome idic(Y). The karyotype was reinterpreted as mos 47, X, idic(Y)(q11.23)×2(10)/46, X, idic(Y)(q11.23)(50) in case 1. The karyotype was redefined as 45, XO(6)/46, X, idic(Y)(q11.22)(23)/46, X, del(Y)(q11.22)(1) in case 2. 46, XY, -Y(mos) was found by CNV-seq in case 3, and the karyotype of 45, XO/46, XY was speculated. Conclusions: The clinical manifestations of children with DSD caused by Y chromosome CNV are short stature and gonadal dysgenesis. If there is an increase of Y chromosome CNV detected by CNV-seq, FISH is recommended to classify the structural variation of Y chromosome.

Diagnosis and treatment of malignant mesothelioma of the tunica vaginalis testis: a series of 7 cases / 中华外科杂志

Objective: To investigate the clinical features, diagnosis, prognosis of malignant mesothelioma of the tunica vaginalis testis (MMTVT). Methods: The clinicopathological data of 7 patients with MMTVT who treated at Sun Yat-sen University Cancer Center between January 2010 and October 2022 were retrospectively reviewed. Cases were first diagnosed at (M (IQR)) 49 (23) years old (range: 27 to 64 years old). The main clinical manifestations were scrotal enlargement (7 cases) and hydrocele (2 cases). Results: Three patients underwent radical orchiectomy as initial treatment, 2 cases underwent hydrocelectomy due to diagnosis of hydrocele, followed by radical orchiectomy at Sun Yat-sen University Cancer Center, and 2 cases underwent transscrotal orchiectomy. Common tumor markers of testicular cancer were not significantly elevated in MMTVT. The expression of tumor PD-L1 was positive in 2 out of the 3 cases. One patient received adjuvant chemotherapy and 2 patients received first-line chemotherapy after tumor recurrence. Chemotherapy regimens used include cisplatin+pemetrexed. Up to October 2022, 3 cases relapsed, of which 2 cases died. The median overall survival was 35 months (range: 4 to 87 months) and the median progression-free survival was 6 months (range: 2 to 87 months). Conclusions: MMTVT at early stage should be treated with early radical orchiectomy and followed up closely after surgery. The cisplatin+pemetrexed regimen is a common option for the treatment of metastatic MMTVT, while whether immune checkpoint inhibitors could serve as a second-line treatment option deserves further research.

The value of cardiac MRI in the risk stratification in patients with hypertrophic cardiomyopathy / 中华心血管病杂志

Objective: To explore the value of cardiac magnetic resonance imaging (CMR) in the risk stratification of hypertrophic cardiomyopathy (HCM). Methods: HCM patients who underwent CMR examination in Fuwai Hospital between March 2012 and May 2013 were retrospectively enrolled. Baseline clinical and CMR data were collected and patient follow-up was performed using telephone contact and medical record. The primary composite endpoint was sudden cardiac death (SCD) or and equivalent event. The secondary composite endpoint was all-cause death and heart transplant. Patients were divided into SCD and non-SCD groups. Cox regression was used to explore risk factors of adverse events. Receiver operating characteristic (ROC) curve analysis was used to assess the performance and the optimal cut-off of late gadolinium enhancement percentage (LGE%) for the prediction of endpoints. Kaplan-Meier and log-rank tests were used to compare survival differences between groups. Results: A total of 442 patients were enrolled. Mean age was (48.5±12.4) years and 143(32.4%) were female. At (7.6±2.5) years of follow-up, 30 (6.8%) patients met the primary endpoint including 23 SCD and 7 SCD equivalent events, and 36 (8.1%) patients met the secondary endpoint including 33 all-cause death and 3 heart transplant. In multivariate Cox regression, syncope(HR=4.531, 95%CI 2.033-10.099, P<0.001), LGE% (HR=1.075, 95%CI 1.032-1.120, P=0.001) and left ventricular ejection fraction (LVEF) (HR=0.956, 95%CI 0.923-0.991, P=0.013) were independent risk factors for primary endpoint; Age (HR=1.032, 95%CI 1.001-1.064, P=0.046), atrial fibrillation (HR=2.977, 95%CI 1.446-6.131, P=0.003),LGE% (HR=1.075, 95%CI 1.035-1.116, P<0.001) and LVEF (HR=0.968, 95%CI 0.937-1.000, P=0.047) were independent risk factors for secondary endpoint. ROC curve showed the optimal LGE% cut-offs were 5.1% and 5.8% for the prediction of primary and secondary endpoint, respectively. Patients were further divided into LGE%=0, 0<LGE%<5%, 5%≤LGE%<15% and LGE%≥15% groups. There were significant survival differences between these 4 groups whether for primary endpoint or secondary endpoint (all P<0.001) and the accumulated incidence of primary endpoint was 1.2% (2/161), 2.2% (2/89), 10.5% (16/152) and 25.0% (10/40), respectively. Conclusion: LGE is an independent risk factor for SCD events as well as all-cause death and heart transplant. LGE is of important value in the risk stratification in patients with HCM.

A foot structure study of new arch flexibility grading system based on three-dimensional arch volume / 中华创伤杂志(英文版)

PURPOSE@#Different arch structures may cause different foot function injuries. In the past, the arch structure and flexibility of the foot were often defined by the height of the arch, and there was no three-dimensional (3D) structure classification method. In order to form a more complete 3D description, we propose a new classification system of arch volume flexibility (AVF), and then use this new classification system to investigate the relationship between the AVF and arch index (AI), and the arch height flexibility (AHF) and AI, respectively.@*METHODS@#It is proposed to recruit 180 young male adults for the test. We obtained arch volume and AI through 3D scanning and obtained the navicular height through manual measurement. Based on these data, we calculated the AHF and the AVF. Using the quintile method, these arches are divided into very stiff, stiff, neutral, flexible, and very flexible. According to AI value, all arches were divided into cavus, rectus, and planus. The distribution of AVF was compared using χ2 goodness of fit test. The spearman correlation test was used to compare the AHF and AVF. A p < 0.05 indicates that the difference is statistically significant.@*RESULTS@#All participants' plantar data was obtained through 3D scanning, but only 159 of them were complete, so only 318 feet had valid data. The left AHF is (21.23 ± 12.91) mm/kN, and the right AHF is (21.71 ± 12.69) mm/kN. The AVF of the left foot arch is (207.35 ± 118.28) mm3/kg, while the right one is (203.00 ± 117.92) mm3/kg, and the total AVF of the arch was (205.17 ± 117.94) mm3/kg. There was no statistical difference in the AVF between the left and right feet for the same participant (n = 159, p = 0.654). In cavus, the percentage of arch with AVF is 21.4% (very stiff), 21.4% (stiff), 14.3% (neutral), 7.1% (flexible), and 35.7% (very flexible). In rectus, the percentage of arch with AVF is 23.9% (very stiff), 19.6% (stiff), 14.7% (neutral), 24.5% (flexible), and 17.2% (very flexible). In planus, the percentage of arch with AVF is 14.9% (very stiff), 20.6% (stiff), 27.0% (neutral), 16.3% (flexible), and 21.3% (very flexible). Moreover, the correlation between AHF and AVF is not significant (p = 0.060).@*CONCLUSION@#In cavus, rectus, and planus, different AVF accounts different percentage, but the difference is not statistically significant. AVF is evenly distributed in the arches of the feet at different heights. We further found the relationship between AHF and AVF is not significant. As a 3D index, AVF may be able to describe the flexibility of the arch more comprehensively than AHF.

Meta-analysis of obesity on the outcome of rotator cuff repair / 中国骨伤

OBJECTIVE@#To systematically evaluate obesity on the outcome of rotator cuff repair.@*METHODS@#Literatures on the relationship between obesity and outcomes after rotator cuff repair were searched from PubMed, Embase, Cochrane Library, Web of Science, China biology medicine(CBM), CNKI, Wanfang and VIP databases from building database to August 1, 2022, and were screened independently by two authors according to inclusion and exclusion criteria. Endnote X9 and Excel 2019 were used for literature extraction, management and data entry, and Newcastle-Ottawa Scale (NOS) was used to evaluate quality of the included literatures. STATA 16.0 and RevMan 5.4 softwares were used to evaluate postoperative retear rate, reoperation rate, complication rate, American Shoulder and Elbow Surgeons (ASES) score, visual analogue scale (VAS), operative time and external rotation angle of shoulder joint pain were analyzed.@*RESULTS@#Totally 13 literatures were included, including 6 retrospective studies, 5 case-control studies, 1 prospective cohort study, and 1 abstract of a study for which the full text was not available, with 85 503 patients (31 973 in obese group and 53 530 in non-obese group). Meta-analysis showed there were statistical differences between two groups in retear rate [OR=2.58, 95%CI(1.23, 5.41), P=0.01], reoperation rate[OR=1.31, 95%CI(1.21, 1.42), P<0.00], complication rate [OR=1.57, 95%CI(1.31, 1.87), P=0.00], ASES score[MD=-3.59, 95%CI(-5.45, -1.74), P=0.00], and VAS[MD=0.24, 95%CI(0.00, 0.49), P=0.05]. While there were no differences between two groups in operative time[MD=6.03, 95%CI(-7.63, 19.69), P=0.39], external rotation angle of shoulder joint[MD=-1.79, 95%CI(-5.30, 1.71), P=0.32].@*CONCLUSION@#Obesity is associated with higher rates of retear, resurgery, complications, poorer shoulder function and pain after rotator cuff repair.

Clinical study of intercondylar fossa formation to prevent intercondylar fossa impingement after high tibia osteotomy / 中国骨伤

OBJECTIVE@#To observe the clinical efficacy of intercondylar fossa plasty in preventing intercondylar fossa impingement syndrome after high tibial osteotomy.@*METHODS@#From August 2018 to August 2020, 84 patients with inverted knee osteoarthritis were treated by arthroscopy combined with high tibial osteotomy, and were divided into two groups with 42 cases in each group according to different surgical methods. In the intercondylar fossa plasty group, there were 13 males and 29 females, age ranged from 52 to 67 years old with an average of(58.27±4.32) years old, and arthroscopic intercondylar fossa plasty was performed first, and then high tibial osteotomy. In the arthroscopic cleansing group, 16 males and 26 females, age ranged from 50 to 71 years old with an average of (59.02±5.14) years old, underwent arthroscopic cleansing and then high tibial osteotomy. Postoperative treatment was evaluated using visual analogue scale(VAS), hospital for special surgery (HSS) score for the knee, and the occurrence of intercondylar percussa impingement.@*RESULTS@#All 84 patients were followed up, the duration ranged from 12 to 18 months with an average of (14.1±1.6) months. The VAS and HSS score of knee joint at 6, 12 and 18 months after surgery were significantly improved compared with preoperative period, and there was no significant difference between the two groups (P>0.05), but the incidence of intercondylar fossa index and intercondylar fossa impact between the two groups was significantly compared 18 months after surgery (P<0.05).@*CONCLUSION@#Intercondylar fossa plasty can effectively prevent the incidence of intercondylar fossa impact after high tibial osteotomy, and has a more significant effect on postoperative knee pain and function improvement.

Mediating effect of psychological resilience between perceived organizational support and presenteeism among medical staff in the prevention and control of COVID-19 / 中国职业医学

@#Objective （ ） To explore the influence of perceived organizational support POS and psychological resilience on （ - ）Methods presenteeism behavior in medical staff in the prevention and control of coronavirus disease COVID 19 . Doctors - - and nurses engaged in the front line work of prevention and control in the four designated hospitals for the treatment of COVID ， 19 in Guangdong Province Hunan Province and Jiangsu Province were selected as the research subjects using a random cluster ， - - sampling method. The Survey of Perceived Organizational Support Scale the 10 item Connor Davidson Resilience Scale and - ， Results Standford Presenteeism Scale 6 were used to investigate their POS psychological resilience and presenteeism. The ， （ ），（ ） （ ）， total scores of POS psychological resilience and presenteeism were 44.9±7.6 31.2±5.7 and 18.5±3.7 respectively. （ Both POS and psychological resilience had negative effect on presenteeism standardized regression coefficient were −0.59 ， P ） ［ and −0.38 both <0.01 . Psychological resilience played a partial mediating role between POS and presenteeism 95% （ - ）， ］ Conclusion confidence interval −0.22 −0.09 the mediating effect ratio was 23.4% . Both POS and psychological - ， resilience can directly affect the presenteeism behavior of medical staff in COVID 19 prevention and control and POS can also indirectly affect their presenteeism by affecting psychological resilience.

Mediating effect of psychological resilience between perceived organizational support and presenteeism among medical staff in the prevention and control of COVID-19 / 中国职业医学

@#Objective （ ） To explore the influence of perceived organizational support POS and psychological resilience on （ - ）Methods presenteeism behavior in medical staff in the prevention and control of coronavirus disease COVID 19 . Doctors - - and nurses engaged in the front line work of prevention and control in the four designated hospitals for the treatment of COVID ， 19 in Guangdong Province Hunan Province and Jiangsu Province were selected as the research subjects using a random cluster ， - - sampling method. The Survey of Perceived Organizational Support Scale the 10 item Connor Davidson Resilience Scale and - ， Results Standford Presenteeism Scale 6 were used to investigate their POS psychological resilience and presenteeism. The ， （ ），（ ） （ ）， total scores of POS psychological resilience and presenteeism were 44.9±7.6 31.2±5.7 and 18.5±3.7 respectively. （ Both POS and psychological resilience had negative effect on presenteeism standardized regression coefficient were −0.59 ， P ） ［ and −0.38 both <0.01 . Psychological resilience played a partial mediating role between POS and presenteeism 95% （ - ）， ］ Conclusion confidence interval −0.22 −0.09 the mediating effect ratio was 23.4% . Both POS and psychological - ， resilience can directly affect the presenteeism behavior of medical staff in COVID 19 prevention and control and POS can also indirectly affect their presenteeism by affecting psychological resilience.