BACKGROUND:Currently,treatment method for knee osteoarthritis includes oral medicine,joint cavity drug injection,and physiotherapy,but the curative effect is limited.Existing studies have confirmed that silicon-based bioceramics can promote cartilage and subchondral bone repair and vascular regeneration.OBJECTIVE:To explore the effect of different concentrations of silicon-based bioceramics injected into the knee joint cavity in the treatment of knee osteoarthritis in rats.METHODS:Silicon-based bioceramics-calcium silicate was prepared.Twenty-five SD rats were randomly divided into five groups,with five rats in each group.The healthy group did not receive any intervention,and the modeling group,low-dose calcium silicate group,high-dose calcium silicate group,and saline group used anterior cruciate ligament transection to establish bilateral knee osteoarthritis models.Four weeks after modeling,0.05 mL of 50 and 100 mg/mL calcium silicate solution were injected into the knee joint cavity in the low-dose calcium silicate group and high-dose calcium silicate group,respectively,and 0.05 mL of saline was injected into the knee joint cavity in the saline group,once a week for 4 consecutive weeks.In the fifth week of administration,bilateral knee joint Micro-CT detection,knee joint cartilage hematoxylin-eosin staining,and modified Mankin score were performed.RESULTS AND CONCLUSION:(1)Micro-CT quantitative analysis showed that compared with the healthy group,the volume fraction and number of trabeculae of the medial tibial plateau in the modeling group decreased(P＜0.05),and the separation of trabeculae increased(P＜0.05).Compared with the modeling group,the volume fraction and number of trabeculae of the medial tibial plateau in the low-dose calcium silicate group and the saline group increased(P＜0.05),and the separation of trabeculae decreased(P＜0.05).(2)Hematoxylin-eosin staining showed that the cartilage surface of the healthy group and the low-dose calcium silicate group was relatively smooth and flat,the chondrocytes were evenly distributed,without clustered chondrocytes,the tide line was complete,and the staining was uniform;the cartilage surface of the high-dose calcium silicate group was slightly uneven,the middle and deep cells were disordered,with a small number of clustered chondrocytes,the tide line was discontinuous,and the staining was uneven;the cartilage surface of the saline group and the modeling group was obviously rough,the cells were disordered,with a large number of clustered chondrocytes,the tide line disappeared,and the staining was uneven.The modified Mankin score of the healthy group was lower than that of the high-dose calcium silicate group,the saline group,and the modeling group(P＜0.05).The modified Mankin score of the high-dose calcium silicate group and the low-dose calcium silicate group was lower than that of the saline group and the modeling group(P＜0.05).(3)The results show that calcium silicate knee joint injection has a certain effect in the treatment of knee osteoarthritis.Compared with 100 mg/mL calcium silicate solution,50 mg/mL calcium silicate solution can promote the recovery of subchondral bone and cartilage.

BACKGROUND:Currently,treatment method for knee osteoarthritis includes oral medicine,joint cavity drug injection,and physiotherapy,but the curative effect is limited.Existing studies have confirmed that silicon-based bioceramics can promote cartilage and subchondral bone repair and vascular regeneration.OBJECTIVE:To explore the effect of different concentrations of silicon-based bioceramics injected into the knee joint cavity in the treatment of knee osteoarthritis in rats.METHODS:Silicon-based bioceramics-calcium silicate was prepared.Twenty-five SD rats were randomly divided into five groups,with five rats in each group.The healthy group did not receive any intervention,and the modeling group,low-dose calcium silicate group,high-dose calcium silicate group,and saline group used anterior cruciate ligament transection to establish bilateral knee osteoarthritis models.Four weeks after modeling,0.05 mL of 50 and 100 mg/mL calcium silicate solution were injected into the knee joint cavity in the low-dose calcium silicate group and high-dose calcium silicate group,respectively,and 0.05 mL of saline was injected into the knee joint cavity in the saline group,once a week for 4 consecutive weeks.In the fifth week of administration,bilateral knee joint Micro-CT detection,knee joint cartilage hematoxylin-eosin staining,and modified Mankin score were performed.RESULTS AND CONCLUSION:(1)Micro-CT quantitative analysis showed that compared with the healthy group,the volume fraction and number of trabeculae of the medial tibial plateau in the modeling group decreased(P＜0.05),and the separation of trabeculae increased(P＜0.05).Compared with the modeling group,the volume fraction and number of trabeculae of the medial tibial plateau in the low-dose calcium silicate group and the saline group increased(P＜0.05),and the separation of trabeculae decreased(P＜0.05).(2)Hematoxylin-eosin staining showed that the cartilage surface of the healthy group and the low-dose calcium silicate group was relatively smooth and flat,the chondrocytes were evenly distributed,without clustered chondrocytes,the tide line was complete,and the staining was uniform;the cartilage surface of the high-dose calcium silicate group was slightly uneven,the middle and deep cells were disordered,with a small number of clustered chondrocytes,the tide line was discontinuous,and the staining was uneven;the cartilage surface of the saline group and the modeling group was obviously rough,the cells were disordered,with a large number of clustered chondrocytes,the tide line disappeared,and the staining was uneven.The modified Mankin score of the healthy group was lower than that of the high-dose calcium silicate group,the saline group,and the modeling group(P＜0.05).The modified Mankin score of the high-dose calcium silicate group and the low-dose calcium silicate group was lower than that of the saline group and the modeling group(P＜0.05).(3)The results show that calcium silicate knee joint injection has a certain effect in the treatment of knee osteoarthritis.Compared with 100 mg/mL calcium silicate solution,50 mg/mL calcium silicate solution can promote the recovery of subchondral bone and cartilage.

Objective To investigate the protective effect of Yiqi Yangyin Huazhuo Tongluo Formula(YYHT)against high glucose-induced injury in mouse renal podocytes(MPC5 cells)and the possible mechanism.Methods Adult Wistar rats were treated with 19,38,and 76 g/kg YYHT or saline via gavage for 7 days to prepare YYHT-medicated or blank sera for treatment of MPC5 cells cultured in high glucose(30 mmol/L)prior to transfection with a miR-21a-5p inhibitor or a miR-21a-5p mimic.The changes in miR-21a-5p expressions and the mRNA levels of FoxO1,PINK1,and Parkin in the treated cells were detected with qRT-PCR,and the protein levels of nephrin,podocin,FoxO1,PINK1,and Parkin were detected with Western blotting.Autophagic activity in the cells were evaluated with MDC staining.The effect of miR-21a-5p mimic on FoxO1 transcription and the binding of miR-21a-5p to FoxO1 were examined with luciferase reporter gene assay and radioimmunoprecipitation assay.Results MPC5 cells exposed to high glucose showed significantly increased miR-21a-5p expression,lowered expressions of FoxO1,PINK1,and Parkin1 mRNAs,and reduced levels of FoxO1,PINK1,parkin,nephrin,and podocin proteins and autophagic activity.Treatment of the exposed cells with YYHT-medicated sera and miR-21a-5p inhibitor both significantly enhanced the protein expressions of nephrin and podocin,inhibited the expression of miR-21a-5p,increased the mRNA and protein expressions of FoxO1,PINK1 and Parkin,and upregulated autophagic activity of the cells.Transfection with miR-21a-5p mimic effectively inhibited the transcription of FoxO1 and promoted the binding of miR-21a-5p to FoxO1 in MPC5 cells,and these effects were obviously attenuated by treatment with YYHT-medicated sera.Conclusion YYHT-medicated sera alleviate high glucose-induced injury in MPC5 cells by regulating miR-21a-5p/FoxO1/PINK1-mediated mitochondrial autophagy.

Objective To screen and analyze 23 mutation sites of deafness susceptibility genes in newborns in Shenzhen using microfluidic chip technology,aiming to enhance the efficiency and accuracy of early diagnosis of congenital deafness.Methods A total of 10 561 newborns delivered in 19 hospitals in Shenzhen between November 2021 and January 2023 were selected.Heel blood samples were collected from them,and 23 key mutation sites within four core deafness susceptible genes(GJB2,SLC26A4,12S rRNA and GJB3)were detected using microfluidic chip technology.Results The results revealed that 21.87%(2 310/10 561)of the newborns carried at least one mutation in deafness susceptibility genes,with the mutation carrier rate of the GJB2 gene reaching as high as 20.42%(2 157/10 561),57 newborns were found to has compound heterozygous mutations.To further verify the accuracy of the screening results,1 203 newborns out of the 2 310 initially screened as deafness gene carriers were recalled for Sanger sequencing,the gold standard,for verification.The verification results were fully consistent with the initial screening results.Conclusion The method combining microfluidic chip technology with Sanger sequence verification significantly improves the detection efficiency and accuracy of neonatal deafness genes,providing scientific evidence and practical guidance for implementing the three-level prevention strategy for congenital deafness.

OBJECTIVES: To investigate the protective effect of Yiqi Yangyin Huazhuo Tongluo Formula (YYHT) against high glucose-induced injury in mouse renal podocytes (MPC5 cells) and the possible mechanism. METHODS: Adult Wistar rats were treated with 19, 38, and 76 g/kg YYHT or saline via gavage for 7 days to prepare YYHT-medicated or blank sera for treatment of MPC5 cells cultured in high glucose (30 mmol/L) prior to transfection with a miR-21a-5p inhibitor or a miR-21a-5p mimic. The changes in miR-21a-5p expressions and the mRNA levels of FoxO1, PINK1, and Parkin in the treated cells were detected with qRT-PCR, and the protein levels of nephrin, podocin, FoxO1, PINK1, and Parkin were detected with Western blotting. Autophagic activity in the cells were evaluated with MDC staining. The effect of miR-21a-5p mimic on FoxO1 transcription and the binding of miR-21a-5p to FoxO1 were examined with luciferase reporter gene assay and radioimmunoprecipitation assay. RESULTS: MPC5 cells exposed to high glucose showed significantly increased miR-21a-5p expression, lowered expressions of FoxO1, PINK1, and Parkin1 mRNAs, and reduced levels of FoxO1, PINK1, parkin, nephrin, and podocin proteins and autophagic activity. Treatment of the exposed cells with YYHT-medicated sera and miR-21a-5p inhibitor both significantly enhanced the protein expressions of nephrin and podocin, inhibited the expression of miR-21a-5p, increased the mRNA and protein expressions of FoxO1, PINK1 and Parkin, and upregulated autophagic activity of the cells. Transfection with miR-21a-5p mimic effectively inhibited the transcription of FoxO1 and promoted the binding of miR-21a-5p to FoxO1 in MPC5 cells, and these effects were obviously attenuated by treatment with YYHT-medicated sera. CONCLUSIONS YYHT-medicated sera alleviate high glucose-induced injury in MPC5 cells by regulating miR-21a-5p/FoxO1/PINK1-mediated mitochondrial autophagy.
Animals ; MicroRNAs/genetics* ; Podocytes/pathology* ; Drugs, Chinese Herbal/pharmacology* ; Autophagy/drug effects* ; Rats, Wistar ; Protein Kinases/metabolism* ; Rats ; Forkhead Box Protein O1 ; Mice ; Mitochondria/drug effects* ; Ubiquitin-Protein Ligases/metabolism* ; Glucose ; Diabetic Nephropathies ; Male ; Membrane Proteins/metabolism* ; Intracellular Signaling Peptides and Proteins

Objective To screen and analyze 23 mutation sites of deafness susceptibility genes in newborns in Shenzhen using microfluidic chip technology,aiming to enhance the efficiency and accuracy of early diagnosis of congenital deafness.Methods A total of 10 561 newborns delivered in 19 hospitals in Shenzhen between November 2021 and January 2023 were selected.Heel blood samples were collected from them,and 23 key mutation sites within four core deafness susceptible genes(GJB2,SLC26A4,12S rRNA and GJB3)were detected using microfluidic chip technology.Results The results revealed that 21.87%(2 310/10 561)of the newborns carried at least one mutation in deafness susceptibility genes,with the mutation carrier rate of the GJB2 gene reaching as high as 20.42%(2 157/10 561),57 newborns were found to has compound heterozygous mutations.To further verify the accuracy of the screening results,1 203 newborns out of the 2 310 initially screened as deafness gene carriers were recalled for Sanger sequencing,the gold standard,for verification.The verification results were fully consistent with the initial screening results.Conclusion The method combining microfluidic chip technology with Sanger sequence verification significantly improves the detection efficiency and accuracy of neonatal deafness genes,providing scientific evidence and practical guidance for implementing the three-level prevention strategy for congenital deafness.

Establishing a governance structure and an operational model that is compatible with modern hospital manage-ment systems,deepening the reform of hospital management institutions,and exploring the implementation of Super-department System with unified functions are inevitable requirements for promoting the high-quality development of public hospitals.Hospital of Stomatology of Sun Yat-sen University takes the Xi Jinping Thought on Socialism with Chinese Characteristics for a New Era as a guide and fully implements the"Opinions of the General Office of the State Council on Promoting the High Quality Development of Public Hospitals,"integrates party building work and vocational work,carries out practical exploration of the reform of the Su-per-department System,and leads the hospital to achieve phased results in high-quality development.

Objective To investigate the application value of multimodality MRI in diagnosing placenta accreta(PA).Methods The imaging data of 62 patients with PA confirmed by clinical intraoperative diagnosis or postoperative pathology were analyzed retrospectively,and the diagnostic accuracy of multimodality MRI for PA was assessed by comparing multimodality MRI manifestations with clinical intraoperative diagnosis or postoperative pathology findings.Results According to the multimodality MRI findings,62 cases of PA were divided into adhesive PA(n=10),implanted PA(n=39),and penetrating PA(n=13).According to the clinical intraoperative diagnosis or postoperative pathology,62 cases of PA were divided into adhesive PA(n=10),implanted PA(n=40),and penetrating PA(n=12).The multimodality MRI manifestations were in good agreement with clinical intraoperative diagnosis or postoperative pathology,with an overall accuracy of 88.7％.Taking clinical intraoperative diagnosis or postoperative pathology as the"gold standard",the accuracy of multimodality MRI in diagnosing adhesive PA,implanted PA,and penetrating PA were 87.10％,88.71％,and 91.94％,respectively;the sensitivity were 70.00％,92.50％,and 91.67％,respectively;and the specificity were 94.00％,85.71％,and 97.87％,with Kappa values of 0.640,0.815 and 0.848,respectively.Conclusion Multimodality MRI has a high accuracy in diagnosing PA and can be used as a routine screening method for PA in clinical practice.

Purpose: The risk stratification of pediatric anaplastic large cell lymphoma (ALCL) has not been standardized. In this study, new risk factors were included to establish a new risk stratification system for ALCL, and its feasibility in clinical practice was explored. Materials and Methods: On the basis of the non-Hodgkin’s lymphoma Berlin–Frankfurt–Munster 95 (NHL-BFM-95) protocol, patients with minimal disseminated disease (MDD), high-risk tumor site (multiple bone, skin, liver, and lung involvement), and small cell/lymphohistiocytic (SC/LH) pathological subtype were enrolled in risk stratification. Patients were treated with a modified NHL-BFM-95 protocol combined with an anaplastic lymphoma kinase inhibitor or vinblastine (VBL). Results: A total of 136 patients were enrolled in this study. The median age was 8.8 years. The 3-year event-free survival (EFS) and overall survival of the entire cohort were 77.7% (95% confidence interval [CI], 69.0% to 83.9%) and 92.3% (95% CI, 86.1% to 95.8%), respectively. The 3-year EFS rates of low-risk group (R1), intermediate-risk group (R2), and high-risk group (R3) patients were 100%, 89.5% (95% CI, 76.5% to 95.5%), and 67.9% (95% CI, 55.4% to 77.6%), respectively. The prognosis of patients with MDD (+), stage IV cancer, SC/LH lymphoma, and high-risk sites was poor, and the 3-year EFS rates were 45.3% (95% CI, 68.6% to 19.0%), 65.7% (95% CI, 47.6% to 78.9%), 55.7% (95% CI, 26.2% to 77.5%), and 70.7% (95% CI, 48.6% to 84.6%), respectively. At the end of follow-up, one of the five patients who received maintenance therapy with VBL relapsed, and seven patients receiving anaplastic lymphoma kinase inhibitor maintenance therapy did not experience relapse. Conclusion This study has confirmed the poor prognostic of MDD (+), high-risk site and SC/LH, but patients with SC/LH lymphoma and MDD (+) at diagnosis still need to receive better treatment (ClinicalTrials.gov number, NCT03971305).

Glaucoma is one of blind causing diseases. The cup-to-disc ratio is the main basis for glaucoma screening. Therefore, it is of great significance to precisely segment the optic cup and disc. In this article, an optic cup and disc segmentation model based on the linear attention and dual attention is proposed. Firstly, the region of interest is located and cropped according to the characteristics of the optic disc. Secondly, linear attention residual network-34 (ResNet-34) is introduced as a feature extraction network. Finally, channel and spatial dual attention weights are generated by the linear attention output features, which are used to calibrate feature map in the decoder to obtain the optic cup and disc segmentation image. Experimental results show that the intersection over union of the optic disc and cup in Retinal Image Dataset for Optic Nerve Head Segmentation (DRISHTI-GS) dataset are 0.962 3 and 0.856 4, respectively, and the intersection over union of the optic disc and cup in retinal image database for optic nerve evaluation (RIM-ONE-V3) are 0.956 3 and 0.784 4, respectively. The proposed model is better than the comparison algorithm and has certain medical value in the early screening of glaucoma. In addition, this article uses knowledge distillation technology to generate two smaller models, which is beneficial to apply the models to embedded device.
Humans ; Optic Disk/diagnostic imaging* ; Glaucoma/diagnosis* ; Algorithms ; Diagnostic Techniques, Ophthalmological ; Databases, Factual