[Objective] To evaluate the clinical application value of intrauterine perfusion with platelet-rich plasma (PRP) combined with in vitro fertilization-frozen-thawed embryo transfer (IVF-FET) in patients with chronic endometritis (CE). [Methods] A randomized controlled trial (RCT) was conducted, enrolling 60 CE patients undergoing artificial cycle frozen embryo transfer at our hospital from January 2022 to January 2024. Participants were randomly divided into three groups: Group A (routine frozen embryo transfer, n=20), Group B (routine frozen embryo transfer + one PRP intrauterine perfusion, n=20), and Group C (routine frozen embryo transfer + two PRP intrauterine perfusions, n=20). Endometrial thickness during the transformation and transplantation phases, uterine artery pulsatility index (PI), resistance index (RI), systolic peak velocity/end-diastolic velocity (S/D) ratio during transplantation, serum levels of IL-2, IL-4, IL-6, IL-10, and TNF-α during transplantation, as well as biochemical pregnancy rate, clinical pregnancy rate, live birth rate, and early miscarriage rate were compared across groups. [Results] No significant differences in endometrial thickness were observed among the three groups during the transformation phase (P>0.05). During the transplantation phase, endometrial thickness in Groups C and B was significantly higher than in Group A[9.54 (8.96-10.22) and 8.90 (8.34-9.72) vs 8.37 (7.89-8.75) mm, P<0.05], with Group C showing greater thickness than Group B (Z=3.733, P<0.05). Endometrial thickness in Groups C and B during transplantation was significantly increased compared to their respective transformation phases (Z=2.191, 2.462; P<0.05). Groups C and B exhibited lower PI, RI, and S/D values than Group A[PI:1.87 (1.77-1.97), 1.94 (1.88-2.15) vs 2.43 (2.35-2.49); RI:0.75 (0.73-0.77), 0.78 (0.75-0.81) vs 0.84 (0.83-0.86); S/D:2.61 (2.33-3.42), 3.01 (2.20-3.93) vs 3.72 (3.06-4.49); P<0.05]. Group C demonstrated lower PI and RI than Group B (P<0.05). IL-2 levels in Groups C and B were higher than in Group A[3.88 (2.71-5.01), 3.59 (2.73-4.38) vs 3.16 (2.11-3.25) ng/L, P<0.05], while IL-4, IL-6, IL-10, and TNF-α levels were significantly lower (IL-4: Z=1.428, 2.421; IL-6: Z=1.754, 2.435; IL-10: Z=1.754, 2.854; TNF-α: Z=1.961, 1.765; P<0.05). Group C had lower IL-6 levels than Group B (Z=3.976, P<0.05). Biochemical pregnancy rate, clinical pregnancy rate, and live birth rate in Group C were significantly higher than in Group A (75% vs 40%, 70% vs 35%, 60% vs 20%, P<0.05). No significant differences in early miscarriage rates were observed among the groups (χ²=3.750, P>0.05). [Conclusion] Intrauterine autologous PRP perfusion in CE patients enhances pregnancy and live birth rates, improves pregnancy outcomes post-FET, and demonstrates superior efficacy in endometrial repair and receptivity with two PRP perfusions compared to a single perfusion. This provides a safe and effective therapeutic option for optimizing outcomes in CE patients with prior implantation failure.

Objective Endothelial injury plays a crucial role in forming deep vein thrombosis.This study aims to compare the effectiveness of various methods for creating rabbit femoral vein thrombotic models after the endothelial injuryso as to provide a solid experimental foundation for further research on the endothelial injury and deep vein thrombosis.Methods Forty-five rabbits were randomly divided into three groups(A,B,C),with 15 cases in each group and subjected to the endothelial injury using the methods of simple clamping,combined complete ligation,and combined incomplete ligation,respectively.The intravascular ultrasonic manifestations and local endothelial pathological changes were compared at 1,3,and 7 days after modeling.Results Significant differences in vascular diameter and Young's modulus values were observed after 7 days of modeling(P<0.05).In pairwise comparisons between the groups,the Young's modulus values in group C were significantly higher than those in groups A and B after 7 days of modeling(P<0.05).Pathological examination confirmed the presence of fibr-inoid thrombus in the blood vessels of group C on the seventh day of modeling.Conclusion Combining simple clam-ping and incomplete ligation can produce a relatively stable endothelial injury and thrombus formation.This method provides a robust experimental model for further investigation into deep vein thrombosis after the endothelial injury.

OBJECTIVE To study the intervention effects of Wenshen Tongluo Zhitong Recipe(WTZR)on macrophage senes-cence and senile osteoporosis.METHODS The senescent macrophage model was established using hydrogen peroxide(H2 O2)and subsequently divided into four groups:control,model,low-dose drug-treated serum,and high-dose drug-treated serum.β-galactosidase staining,Western blot and qPCR were employed to evaluate the mRNA expression of senescence markers p21 and p53.ROS staining and JC-1 staining were applied to assess mitochondrial function in macrophages.The mRNA levels of Interleukin(IL)-6,IL-10,CD206,and inducible nitric oxide synthase(iNOS)were determined by qPCR analysis.Immunofluorescence was used to evaluate argi-nase(ARG1)and iNOS protein expressions for assessing the impact of drug-containing serum on macrophage polarization.qPCR analy-sis was conducted to measure osteocalcin(OCN),collagen type Ⅰ alpha 1(Col1a1),runt-related transcription factor 2(Runx2)mRNA levels as osteoblast-related markers;ALP staining along with alizarin red staining were performed to evaluate the effect of macrophage conditioned medium treated with drug-containing serum on bone marrow mesenchymal stromal cell(BMSC)osteogenic differentiation.C57BL/6J mice were randomly allocated into four groups:control group,model group,WTZR low-dose group,and WTZR high-dose group.The senile osteoporosis(SOP)mouse model was established by D-galactose.Micro-CT scanning analyzed fe-mur microstructure while HE staining detected pathological changes in femur bone tissue samples collected from each experimental con-dition.Furthermore,Western blot was used to detect the senescence-related molecules p21 and p53 and the osteogenesis-related mark-ers OCN and Runx2,qPCR analysis measured tibial expression levels of senescence-related molecules(p21,p53)as well as macro-phage polarisation-related molecules(IL-6,iNOS,CD206,and IL-10)to assess the effect of this compound on a mouse model simula-ting SOP.RESULTS Following intervention with serum containing WTZR,there was a significant decrease in the number of senes-cent positive cells compared to the model group.Additionally,there was a notable decrease in p21 and p53 mRNA and proteins expres-sion(P＜0.05,P＜0.01,P＜0.001).Furthermore,drug-containing WTZR effectively inhibited ROS production induced by H2 O2 and mitigated mitochondrial membrane potential reduction in macrophages(P＜0.05,P＜0.001).Treatment with drug-containing WTZR re-sulted in down-regulated mRNA expression of M1-related gene iNOS(P＜0.05)while up-regulating mRNA expression of M2-related genes CD163 and CD206(P＜0.05).The drug-containing WTZR significantly reduced fluorescence intensity for iNOS(P＜0.01)while increasing ARG1(P＜0.05)fluorescence intensity.Moreover,conditioned medium from macrophages treated with drug-containing ser-um increased ALP positive cell count(P＜0.01,P＜0.001),alizarin red positive area(P＜0.05),as well as Col1a1,Runx2 and OCN mRNA expression levels(P＜0.05,P＜0.01).The Tb.N,BMD,and BV/TV were significantly higher in the WTZR group compared to the model group(P＜0.05,P＜0.01,P＜0.001);meanwhile,Tb.Sp was notably lower than that observed in the model group(P＜0.05,P＜0.01);bone trabeculae were significantly improved,increased in number and widened.Additionally,the compound could significantly inhibit the D-galactose induced up-regulation of tibial senescence-related genes and proteins p21 and p53(P＜0.05,P＜0.001,P＜0.0001),promote the expression of osteogenesis-related markers OCN and Runx2 protein(P＜0.01,P＜0.0001),promote the down-regulation of M1 related genes IL-6 and iNOS(P＜0.05),and promote the expression of M2 related genes IL-10 and CD206(P＜0.05,P＜0.01).CONCLUSION Wenshen Tongluo Zhitong Recipe may play an anti-osteoporosis effect by inhibiting macrophage senescence and promoting the osteogenic differentiation of BMSC.

Objective:To investigate the effect of hUCMSC-exos on the expression levels of HDAC in different isotypes of RA FLSs, and to elucidate the possible mechanism of hUCMSC-exos on the apoptosis of RA FLSs by regulating HDAC.Methods:hUCMSC and hUCMSC-Exos were isolated and identified. RT-qPCR was used to detect the changes in HDAC mRNA expression levels in FLSs after hUCMSC-Exos intervention, and the most affected HDAC types were identified. Western blot was used to detect the levels of FLS HDAC1 protein and the expression levels of NF-κB p65 and phospho-NF-κB p65 (Ser 536) in the blank control group, hUCMSC group, hUCMSC-Exos group, Trichostatin A (TSA) group and HDAC1 Inhibitor (Pyroxamide) group. To investigate the effects of hUCMSC-Exos on HDAC expression and NF-κB activity in FLSs. Flow cytometry was used to detect the effect of hUCMSC-Exos on the apoptosis of FLSs. ELISA was used to detect the effects of hUCMSC-Exos on the secretion of TNF-α, IL-6, IL-1β and IL-8 by FLSs. Flow cytometry and ELISA were used to detect the apoptosis level and pro-inflammatory cytokine secretion level of RA FLSs in the blank control group, NF-κB Inhibitor (pyrrolidine dithiocarbamate (PDTC) group, hUCMSC-Exos group and PDTC+hUCMSC-Exos co-intervention group. Whether inhibition of NF-κB affects the regulatory effect of hUCMSC-Exos on RA FLSs was further explored. All experimental data conforming to the normal distribution were compared by one-way ANOVA. LSD- t test was used for pin-group comparison, and independent sample t test was used for two-sample comparison. Results:Cultured primary hUCMSC were adherently grown spindle-shaped cells, and hUCMSC-Exos were saucer-shaped membranous vesicles, both of which met the identification criteria. hUCMSC-Exos reduced the expression level of HDCA1 mRNA [(0.932±0.091), t=2.19, P<0.001] and protein [(0.204±0.012), t=8.28, P<0.001] in RA FLSs, and the inhibitory effect was stronger than that of hUCMSC ( t=1.09, P=0.009) and HDAC1 ( t=11.29, P=0.013) Inhibitor. hUCMSC-Exos increased the apoptosis rate of RA FLSs [(48.68±0.84)%, t=12.33, P<0.001]. hUCMSC-Exos reduced the secretion levels of TNF-α [(29.6±1.0)pg/ml, t=10.78, P<0.001], IL-6 [(20.1±0.7)pg/ml, t=7.96, P<0.001], IL-1β [(9.28±0.23)pg/ml, t=6.14, P<0.001] and IL-8 [(108.0±3.8)pg/ml, t=1.21, P<0.001] in the supernatant of RA FLSs. hUCMSC-Exos reduced the expression level of p-NF-κB-p65/NF-κB-p65 in RA FLSs(0.351±0.024, t=17.67, P<0.001), and its inhibitory effect was stronger than that of hUCMSC (0.515±0.064, t=8.07, P=0.009) and HDAC1 inhibitor(0.411±0.033, t=2.44, P=0.04). After use of NF-κB inhibitors, hUCMSC-Exos weakened the promotion of apoptosis of RA FLSs [(29.0±0.5)%, t=10.63, P<0.001] and weakened the inhibitory effect of IL-8 secretion in the supernatant of RA FLSs [(125.5±3.2)pg/ml, t=2.63, P=0.002]. Conclusion:hUCMSC-Exos can mimic maternal cells to effectively inhibit the aberrant expression of HDAC1 in RA FLSs. hUCMSC-Exos may affect the apoptosis of RA FLSs and the secretion of pro-inflammatory cytokines by inhibiting the HDAC1/NF-κB pathway.

Objective:To analyze the risk factors for ankle varus deformity after McFarland fracture surgery in children.Methods:A total of 48 children with McFarland fracture who underwent surgical treatment in the Second General Hospital of Fuzhou from January 2015 to December 2022 were retrospectively analyzed, including 24 males and 24 females, aged 11.2±3.2 years (range, 2-14 years), 19 cases on the left side and 29 cases on the right side. Salter-Harris classification: 34 cases of type III and 14 cases of type IV. Causes of injuries: 28 cases of sports injuries, 15 cases of fall injuries, and 5 cases of car accident injuries. The time from injury to operation was 2.6±1.7 d (range, 1-7 d). The reduction methods included closed reduction in 38 cases and open reduction in 10 cases. Tibial internal fixation: 42 cases of hollow screws, 6 cases of Kirschner pins. There were 30 cases of combined fibula fracture, 20 cases were fixed with plate, 8 cases were fixed with Kirschner's pin, and 2 cases were not treated with internal fixation. The internal fixation survival time was 6.4±2.8 months (range, 1-12 months). The lateral distal tibial angle (LDTA) was used to determine whether the child had ankle varus deformity. The general data and perioperative indicators of the two groups were compared, and the indicators with statistically significant differences were included in binary logistic regression analysis to determine the independent risk factors for ankle varus deformity after McFarland fracture surgery in children. The receiver operating characteristic curve was drawn and the area under the curve of each independent risk factor was calculated.Results:All patients successfully completed the operation and were followed up for 39.2±21.8 months (range, 15-98 months). At the last follow-up, all the 48 children with McFarland fracture had bone union and the internal fixation was successfully removed, and 5 of them had ankle varus deformity. The LDTA of the affected side was 98.6°±4.8° (range, 94°-106°) in the ankle varus deformity group and 89.0°±0.8° (range, 87°-91°) in the non-ankle varus deformity group. The age of children in the ankle varus deformity group was 6.6±5.1 years, which was younger than that in the non-ankle varus deformity group (11.7±2.5 years), and the difference was statistically significant ( t=3.772, P<0.001). The survival time of internal fixation in the ankle varus deformity group was 4.4±2.2 months, which was shorter than that in the non-ankle varus deformity group (6.6±2.8 months), and the difference was statistically significant ( t=1.750, P=0.087). There was no significant difference in gender, side, cause of injury, fracture type, initial displacement distance, fibular fracture, time from injury to operation, reduction method, or fixation method between the two groups ( P>0.05). Age and duration of internal fixation were included in binary logistic regression analysis. The results showed that age ( OR=0.717, 95% CI: 0.543, 0.945, P=0.018) was an independent risk factor for postoperative ankle varus deformity in children with McFarland fracture. The receiver operating characteristic curve of independent risk factors predicting postoperative ankle varus deformity in children with McFarland fracture was drawn and the area under the curve was calculated. The results showed that the best cut-off value of age was 5.5 years, and the area under the curve was 0.807, and the prediction efficiency of the prediction model was good. Conclusion:Age<5.5 years is an independent risk factor for postoperative varus ankle deformity in children with McFarland fracture.

Objective To analyze and compare the changes in local functional activity of the brain under different recovery times after a 90-day,-6° head down bed rest(HDBR)experiment,clarify the mechanism of brain function remodeling during gravity adaptation,and provide imaging basis and guidance for the model construction and health assessment.Methods 36 healthy male volunteers underwent resting-state functional magnetic resonance imaging(rs-fMRI)scans before HDBR(PRE),3 days after 90-day HDBR(R+3),and 26-28 days after 90-day HDBR(R+26-28),and calculated regional homogeneity(ReHo)and low-frequency amplitude(ALFF)and perform statistical analysis between different time points.Results Compared with PRE-status,ReHo value in the left inferior parietal gyrus and ALFF value in the right posterior cingulate gyrus decreased significantly in R+3 status,while ReHo value in the left calcarine,right lingual gyrus and ALFF value in the precuneus,left paracentral lobule,and right postcentral gyrus increased significantly.At R+26-28 status,more brain areas showed significant changes.Conclusion 90 days of long-term HDBR and subsequent recovery will lead to changes in the neural functional activities of the brain's default network,sensorimotor network and visual network,and obvious adaptive remodeling will occur after a longer period of gravity re-adaptation and recovery.

Objective To investigate the intra-patient variability (IPV) of tacrolimus trough concentrations and its effect on serum creatinine (Scr) level in kidney transplant recipients treated with nematvir/ritonavir. Methods Clinical data of 41 kidney transplant recipients infected by SARS-CoV-2 and treated with nematvir/ritonavir were collected. The usage of nematvir/ritonavir and tacrolimus was summarized. The distribution of tacrolimus trough concentrations and the attainment rate of target concentration were analyzed. The correlation between the IPV distribution of tacrolimus trough concentrations and the changes of Scr level was determined. Results Among 41 kidney transplant recipients, 46%(19/41) were given with full- and low-dose nematvir/ritonavir, and 7%(3/41) were given with high-dose nematvir/ritonavir. Use of tacrolimus was discontinued at 24 h before nematvir/ritonavir treatment in 95%(39/41) patients, and at 24 h after use of nematvir/ritonavir in 5%(2/41) patients. Tacrolimus was given at least 3 d after the 5-d course of nematvir/ritonavir in all patients. The attainment rate of tacrolimus trough concentration was 73%(30/41), 30%(3/10), 48%(15/31), 35%(11/31) and 53%(16/30) before, during, 1 week, 2 weeks and 1 month after use of nematvir/ritonavir, respectively. The median IPV was 35%(23%, 51%). Spearman correlation analysis showed that the increase of Scr level was positively correlated with IPV (r_s=0.400 7, P=0.028 2). Conclusions The attainment rate of tacrolimus trough concentration is declined in kidney transplant recipients treated with nematvir/ritonavir. The IPV of tacrolimus trough concentrations is elevated. The recipients with higher IPV are prone to an elevation in Scr level.

Objective: This study aimed to estimate the clinical effects of different types of bone-anchored maxillary protraction devices by using a network meta-analysis. Methods: We searched seven databases for randomized and controlled clinical trials that compared bone-anchored maxillary protraction with tooth-anchored maxillary protraction interventions or untreated groups up to May 2021. After literature selection, data extraction, and quality assessment, we calculated the mean differences, 95% confidence intervals, and surface under the cumulative ranking scores of eleven indicators. Statistical analysis was performed using R statistical software with the GeMTC package based on the Bayesian framework. Results: Six interventions and 667 patients were involved in 18 studies. In comparison with the tooth-anchored groups, the bone-anchored groups showed significantly more increases in Sella-Nasion-Subspinale (°), Subspinale-Nasion-Supramentale(°) and significantly fewer increases in mandibular plane angle and the labial proclination angle of upper incisors. In comparison with the control group, Sella-NasionSupramentale(°) decreased without any statistical significance in all treated groups. IMPA (angle of lower incisors and mandibular plane) decreased in groups with facemasks and increased in other groups. Conclusions Bone-anchored maxillary protraction can promote greater maxillary forward movement and correct the Class III intermaxillary relationship better, in addition to showing less clockwise rotation of mandible and labial proclination of upper incisors. However, strengthening anchorage could not inhibit mandibular growth better and the lingual inclination of lower incisors caused by the treatment is related to the use of a facemask.

Objective: To investigate the expression and function of the TNF signaling pathway in the early stage of orthodontic tooth movement with periodontitis and to provide evidence to study the early inflammatory response in patients with periodontitis orthodontic treatment. Methods: Sixteen SD rats were randomly divided into four groups: group A--12 h of orthodontic tooth movement of the bilateral maxillary first molars in rats with periodontitis; group B--periodontitis model of the bilateral maxillary first molars without orthodontic tooth movement; group C--12 h of orthodontic tooth movement of the same teeth in rats with healthy periodontium; group D--control group without operations. The bilateral maxillary first molars and surrounding periodontal tissue of each group were collected for gene chip detection. Pathway enrichment analysis, qRT-PCR and GO (gene ontology) analysis were performed to identify differential genes involved in the TNF signaling pathway. Results : Gene chip results showed that the TNF signaling pathway was significantly upregulated in group A, group B and group C (P <0.01). Among the differential genes involved in the pathway, 28 were upregulated and 5 were downregulated in group A, 12 were upregulated and 4 were downregulated in group B, and 12 were upregulated and 1 was downregulated in group C (P <0.05). The most significant GO items included "response to lipopolysaccharide", "inflammatory response", "positive regulation of NF-κB transcription factor activity", "positive regulation of NF-κB import into nucleus" and "response to hypoxia"(P <0.001). qRT-PCR results showed no significant difference in TNF-α mRNA expression in group C compared with that in group D, TNF-α was upregulated in both groups A and B (P <0.01), and mRNA expression decreased in the following order: group A > group B > group C (P <0.05). Compared with group D, the expression levels of prostaglandin-endoperoxide synthase 2 (PTGS2) and interleukin-6 ( IL-6) in groups A, B and C were significantly upregulated (P <0.05), but the expression levels of PTGS2 and IL-6 in group A were lower than those in group B (P < 0.05). Conclusion The TNF signaling pathway is activated in the early stage of orthodontic tooth movement in rats with periodontitis. The pathway products participate in many biological processes and play an important role in the inflammatory response and bone absorption.

Objective To determine the accuracy of intracavitary electrocardiogram bimodal P-wave and characteristic P-wave in the position of PICC tip. Methods In the process of ECG guided catheterization, the morphological changes of P-wave in the intracavitary electrocardiogram were observed, and the bimodal P-wave and characteristic P-wave were recorded. The corresponding catheter length of the bimodal P-wave and characteristic P-wave were recorded. CT three-dimensional reconstruction was performed on 416 patients who underwent CT examination before and after catheterization. The distance between carina of trachea to superior vena cava and the right atrium junction was measured as best position of PICC and the standard distance. After catheterization, the distance from the tip of catheter to the corresponding catheter length of the bimodal P-wave and characteristic P-wave was measured as actual distance, and compared with the standard distance. Results In 416 cases, 168 patients (40.38％) were bimodal P-wave, and the accurate rate of bimodal P-wave was 86.31％(145/416), and the accurate rate of the characteristic P-wave was 13.69％(23/416). The standard distance was (41.96 ± 9.16) mm, the actual distance of corresponding characteristic P-wave was (48.00±15.18) mm and bimodal P-wave was (45.10± 11.16) mm. The distance of bimodal P-wave to control was (1.31±0.33) mm and characteristic P-wave was (6.00 ± 2.88) mm, which was significant statistical difference (t =5.197, P < 0.05), and the standard deviation of the distance of bimodal P-wave to control was smaller (0.33 < 2.88). Conclusions The intracavitary electrocardiogram bimodal P-wave is more accurate than characteristic P-wave in the position of PICC tip and it supplements and improves thePICC's tip position.