Research status of correlation between myopia and accommodative function / 国际眼科杂志(Guoji Yanke Zazhi)

Ocular accommodation refers to the process by which the ciliary muscle creates a clear image of the object in the retina by changing the refractive power of the lens. When the accommodation ability of the eye is insufficient, the imaging focus falls on the region behind the retina and hyperopic defocus is easily formed, resulting in axial growth and leading to the development of myopia, and it is found that most myopic patients usually have some accommodation dysfunction. Myopia has become a public health problem in China, and the prevalence of adolescents has increased dramatically. How to prevent and stop the occurrence and development of myopia is a major challenge. Previous studies have found that ocular accommodation dysfunction is associated with the occurrence and development of myopia, and the measurement of parameters related to accommodation function has certain guiding significance for the prevention and control of myopia. The purpose of this paper is to review the correlation between myopia and ocular accommodation function, with a view to providing new ideas for the prevention, control and treatment of myopia.

Proteomic analysis and validation of DNA repair regulation in the process of hepatocellular carcinoma recurrence / 临床肝胆病杂志

ObjectiveTo investigate the role and mechanism of DNA repair regulation in the process of hepatocellular carcinoma （HCC） recurrence. MethodsHCC tissue samples were collected from the patients with recurrence within two years or the patients with a good prognosis after 5 years， and the Tandem Mass Tag-labeled quantification proteomic study was used to analyze the differentially expressed proteins enriched in the four pathways of DNA replication， mismatch repair， base excision repair， and nucleotide excision repair， and the regulatory pathways and targets that play a key role in the process of HCC recurrence were analyzed to predict the possible regulatory mechanisms. The independent samples t-test was used for comparison of continuous data between two groups； a one-way analysis of variance was used for comparison between multiple groups， and the least significant difference t-test was used for further comparison between two groups. ResultsFor the eukaryotic replication complex pathway， there were significant reductions in the protein expression levels of MCM2 （P=0.018）， MCM3 （P=0.047）， MCM4 （P=0.014）， MCM5 （P=0.008）， MCM6 （P=0.006）， MCM7 （P=0.007）， PCNA （P=0.019）， RFC4 （P=0.002）， RFC5 （P<0.001）， and LIG1 （P=0.042）； for the nucleotide excision repair pathway， there were significant reductions in the protein expression levels of PCNA （P=0.019）， RFC4 （P=0.002）， RFC5 （P<0.001）， and LIG1 （P=0.042）； for the base excision repair pathway， there were significant reductions in the protein expression levels of PCNA （P=0.019） and LIG1 （P=0.042） in the HCC recurrence group； for the mismatch repair pathway， there were significant reductions in the protein expression levels of MSH2 （P=0.026）， MSH6 （P=0.006）， RFC4 （P=0.002）， RFC5 （P<0.001）， PCNA （P=0.019）， and LIG1 （P=0.042） in recurrent HCC tissue. The differentially expressed proteins were involved in the important components of MCM complex， DNA polymerase complex， ligase LIG1， long patch base shear repair complex （long patch BER）， and DNA mismatch repair protein complex. The clinical sample validation analysis of important differentially expressed proteins regulated by DNA repair showed that except for MCM6 with a trend of reduction， the recurrence group also had significant reductions in the relative protein expression levels of MCM5 （P=0.008）， MCM7 （P=0.007）， RCF4 （P=0.002）， RCF5 （P<0.001）， and MSH6 （P=0.006）. ConclusionThere are significant reductions or deletions of multiple complex protein components in the process of DNA repair during HCC recurrence.

Stimulation of lipopolysaccharide from Pseudomonas aeruginosa following H9N2 IAV infection exacerbates inflammatory responses of alveolar macrophages and decreases virus replication.

H9N2 IAV infection contributed to P. aeruginosa coinfection, causing severe hemorrhagic pneumonia in mink. In this study, the in vitro alveolar macrophage models were developed to investigate the innate immune responses to P. aeruginosa LPS stimulation following H9N2 IAV infection, using MH-S cells. The cytokine levels, apoptosis levels and the viral nucleic acid levels were detected and analyzed. As a result, the levels of IFN-α, IL-1ß, TNF-α, and IL-10 in MH-S cells with P. aeruginosa LPS stimulation following H9N2 IAV infection were significantly higher than those in MH-S cells with single H9N2 IAV infection and single LPS stimulation (P < 0.05), exacerbating inflammatory responses. LPS stimulation aggravated the apoptosis of MH-S cells with H9N2 IAV infection. Interestingly, LPS stimulation influences H9N2 IAV replication and indirectly reduced H9N2 IAV replications in in vitro AMs. It implied that LPS should play an important role in the pathogenesis of H9N2 IAV and P. aeruginosa coinfection.

Efficacy and safety of activating blood circulation and removing blood stasis of Traditional Chinese Medicine for managing renal fibrosis in patients with chronic kidney disease: a systematic review and Meta-analysis.

OBJECTIVE: To evaluate the efficacy and safety of activating blood circulation and removing blood stasis in terms of Traditional Chinese Medicine (TCM) for managing renal fibrosis (RF) in patients with chronic kidney disease (CKD). METHODS: We searched randomized controlled trials (RCTs) from eight databases. RESULTS: Sixteen eligible studies with 1,356 participants were included in this study. Compared to treatment with Western Medicine (WM) alone, the combined treatment with activating blood circulation and removing blood stasis in terms of TCM (ARTCM) and WM to manage RF in patients with CKD significantly ameliorated type Ⅳ collagen (CⅣ) (: 2.17, 95% : 3.01 to 1.34), type Ⅲ procollagen (PCⅢ) (: 1.08, 95% : 1.64 to 0.53), laminin (LN) (: 1.28, 95% : 1.65 to 0.90), transforming growth factor ß 1 (TGFß1) (: 0.65, 95% : 1.18 to 0.12), serum creatinine (Scr) (: 1.36, 95% : 1.85 to 0.87), blood urea nitrogen (BUN) (: 1.51, 95% : 2.59 to 0.43), and 24 h urine protein (24hUpro) (: 1.23; 95% : 1.96 to 0.50). The level of hyaluronic acid (HA) was similar in both types of treatment (: 0.74, 95% : 1.91 to 0.44). The subgroup analysis showed that the duration of 8 weeks might affect the concentration of C-Ⅳ, PC-Ⅲ, and LN (<0.05). The effectiveness of the longer duration to C-Ⅳ, PC-Ⅲ, and LN was not certain. However, the result should be interpreted in care. The safety of the treatment using ARTCM and WM could not be evaluated because a few studies had reported adverse effects. The results of the Metaanalysis were not stable enough. There was publication bias for the reports on Scr ( 0.001), C-Ⅳ ( 0.001), PC-Ⅲ ( 0.026), and LN ( 0.030) and no publication bias for the reports on BUN ( 0.293). The quality of evidence varied from low to very low. CONCLUSIONS: The combined treatment using ARTCM and WM to manage RF in patients with CKD has some advantages over treatment with WM alone. Highquality RCTs need to be conducted for the strong support.

Danzhi Jiangtang capsule reduces renal injury in rats with diabetes induced by high fat diet and streptozotocin downregulating toll-like receptor 4-nuclear factor-κB pathway and apoptosis.

OBJECTIVE: To investigate the effect and mechanisms of Danzhi Jiangtang capsule (, DJC) on renal injury in streptozotocin (STZ)-induced diabetes of rats. METHODS: Sprague-Dawley rats were fed with high fat diet for 6 weeks followed by streptozotocin (STZ, 35 mg/kg) injection. These rats were then treated with DJC (270, 540 and 1080 mg/kg) daily for 8 weeks. RESULTS: A combination of high fat diet and STZ significantly increased blood glucose creatinine, urea nitrogen, and urine albumin in rats. Meanwhile, the glomerular and tubular lesions were observed in rats fed with high fat diet and injected with STZ. These biochemical and pathological changes were significantly attenuated by DJC treatments in a dose-dependent manner. Mechanistically, DJC treatments significantly decreased toll-like receptor 4 (TLR4), mitogen-activated protein kinase (MAPK), and nuclear factor-κB (NF-κB) signals in the kidney of rats fed with high fat diet and injected with STZ. Terminal deoxynucleotidyl transferase dUTP nick end labeling staining and caspase-8 levels showed that renal apoptosis was increased in rats fed with high fat diet and injected with STZ, and this was attenuated by DJC treatments. CONCLUSIONS: DJC treatments protect against diabetic kidney disease, and the mechanism may be closely related to downregulation of TLR4/MAPK/NF-κB pathways and apoptosis. This study provides further evidence of using DJC as a potential therapeutic option for diabetic kidney disease.

Cloning and Expression Analysis of Squalene Epoxidase Gene in Poria cocos / 中国实验方剂学杂志

ObjectiveTo clone squalene epoxidase （SE）， a potential key rate-limiting enzyme involved in the synthesis pathway of Poria cocos triterpenes， from P. cocos and analyze for bioinformatics and expression. MethodThe total RNA was extracted by the kit and reverse-transcribed to cDNA. Specific primers were designed， and the cDNA was used as a template for cloning the SE gene， which was analyzed for bioinformatics. The expression of P. cocos qualene epoxidase（PcSE） was examined by Real-time polymerase chain reaction（Real-time PCR） in P. coco Shenzhou No. 10， Xiangjing 28， and 5.78 strains. ResultThe full length of PcSE is 1 571 bp， containing four exons and three introns. The obtained CDS sequence is 1 413 bp， encoding 470 amino acids. This protein is a hydrophobic protein with no signal peptide structure and has two transmembrane structural domains with a FAD/NAD （P） binding domain and SE structural domain localized to the mitochondrial membrane and the plasma membrane. The homologous sequence alignment with fungi of the Poriferae family is 80.92%， and the phylogenetic tree shows that PcSE protein is most closely related to P. cocos from the US. The results of Real-time PCR showed that the PcSE was expressed in all three strains， with the highest expression in 5.78 strain， and there was no significant difference in PcSE expression among the three strains. ConclusionFor the first time， the PcSE gene was cloned and analyzed from P. cocos， providing a basis for further research on the function of PcSE and the analysis of P. cocos triterpene biosynthesis pathway.

A Brief Discussion on the in Vitro Diagnostic Reagent Inspection Practice of Self-examination Management Regulations for Medical Device Registration / 中国医疗器械杂志

On October 21, 2021, the National Medical Products Administration issued and implemented the Self-examination Management Regulations for Medical Device Registration. The regulations clarify the specific requirements of the registration applicants in the process of self-examination, and put forward detailed requirements from the aspects of self-examination ability, self-examination report, declaration materials and responsibility requirements, so as to ensure the orderly development of the self-examination of medical device registration. Based on the actual verification work of in vitro diagnostic reagent, this study briefly discussed the understanding of the relevant contents of the regulations, aiming to provide some reference for enterprises and related supervision departments that have the requirement of registered self-examination.

Efficacy and Safety of Allogeneic Hematopoietic Stem Cell Transplantation with Decitabine-containing Regimen in Myelodysplastic Syndromes and Myelodysplastic Syndromes Transformed Acute Myeloid Leukemia / 中国实验血液学杂志

OBJECTIVE@#To evaluate the efficacy and safety of allogeneic hematopoietic stem cell transplantation (allo-HSCT) with decitabine (Dec)-conditioning regimen in the treatment of myelodysplastic syndrome (MDS) and MDS transformed acute myeloid leukemia (MDS-AML).@*METHODS@#The characteristics and efficacy data of 93 patients with MDS and MDS-AML who received allo-HSCT in our center from April 2013 to November 2021 were retrospectively analyzed. All patients were administered by myeloablative conditioning regimen containing Dec (25 mg/m2 /d×3 d).@*RESULTS@#Among the 93 patients, 63 males and 30 females, were diagnosed as MDS（n ＝77）, MDS-AML（n ＝16）. The incidence of I/II grade regimen-related toxicity (RRT) was 39.8%, and III grade RRT was only found in 1 patient (1%). Neutrophil engraftment was successful in 91 (97.8%) patients after a median neutrophil engraftment time of 14 (9-27) days; Successful platelet engraftment was achieved in 87 (93.5%) patients, with a median engraftment time of 18 (9-290) days. The incidence of acute graft versus host disease（aGVHD） and grade III-IV aGVHD was 44.2% and 16.2%, respectively. The incidence of chronic graft versus host disease（cGVHD） and moderate-to-severe cGVHD was 59.5% and 37.1%, respectively. Of the 93 patients, 54 (58%) developed posttransplant infections, among which lung infection (32.3%) and bloodstream infection (12.9%) were the most common. The median follow-up after transplantation was 45 (0.1-108) months. The 5-year overall survival (OS) rate, disease-free survival (DFS) rate, treatment-related mortality, and cumulative incidence of relapse were 72.7%, 68.4%, 25.1%, and 6.5%, respectively. And the 1-year graft-versus-host disease/relapse-free survival rate was 49.3%. The patients in different group of relative high-risk prognostic scoring or low-risk prognostic scoring, with or without poor-risk mutation(s), with mutations number ≥3 or <3 had similar 5-year OS rate (more than 70%). Multivariate analysis showed that the incidence of grade III-IV aGVHD was the independent risk factor affecting OS（P =0.008）and DFS (P =0.019).@*CONCLUSION@#Allo-HSCT with Dec-conditioning regimen is feasible and effective in the treatment of patients with MDS and MDS-AML, especially those in high prognostic risk and with poor-risk mutations.

Research progress in role of autophagy in diabetic wound healing and traditional Chinese medicine intervention / 中国中药杂志

Diabetic ulcer(DU) is a chronic and refractory ulcer which often occurs in the foot or lower limbs. It is a diabetic complication with high morbidity and mortality. The pathogenesis of DU is complex, and the therapies(such as debridement, flap transplantation, and application of antibiotics) are also complex and have long cycles. DU patients suffer from great economic and psychological pressure while enduring pain. Therefore, it is particularly important to promote rapid wound healing, reduce disability and mortality, protect limb function, and improve the quality of life of DU patients. By reviewing the relevant literatures, we have found that autophagy can remove DU wound pathogens, reduce wound inflammation, and accelerate ulcer wound healing and tissue repair. The main autophagy-related factors microtubule-binding light chain protein 3(LC3), autophagy-specific gene Beclin-1, and ubiquitin-binding protein p62 mediate autophagy. The traditional Chinese medicine(TCM) treatment of DU mitigates clinical symptoms, accelerates ulcer wound healing, reduces ulcer recurrence, and delays further deterioration of DU. Furthermore, under the guidance of syndrome differentiation and treatment and the overall concept, TCM treatment harmonizes yin and yang, ameliorates TCM syndrome, and treats underlying diseases, thereby curing DU from the root. Therefore, this article reviews the role of autophagy and major related factors LC3, Beclin-1, and p62 in the healing of DU wounds and the intervention of TCM, aiming to provide reference for the clinical treatment of DU wounds and subsequent in-depth studies.

Cognition about emergency management of avulsed incisor in children among dentists in Guangdong province / 华西口腔医学杂志

OBJECTIVES@#This study aimed to evaluate and analyze the current situation of dentists in Guangdong pro-vince regarding the management of avulsed incisors, thereby providing a reference for making treatment strategies for avulsed incisors in the future.@*METHODS@#A total of 712 dentists with different educational backgrounds and working conditions in Guangdong province were randomly selected to conduct an online questionnaire survey on the cognition of children with avulsed incisors from April 2022 to May 2022. The data were recorded by Excel software and statistics were analyzed on Stata/SE 15.1.@*RESULTS@#A total of 712 dentists were investigated and 701 questionnaires were collected (98.46%). In addition, 65.9% of investigators came from the Department of Stomatology in a First-class Hospital or Stomatological Hospital. The results showed that the average number of avulsed teeth consulted by dentists was less than 20 per year. Although 99.7% of respondents considered normal saline as a suitable storage medium, 3.1% and 23.8% of them had a misunderstanding that the tap/alcohol could be used for root cleaning. Moreover, 93.4% was the correct selection rate of the treatment plan for processing on root surfaces before replanting by investigators. The correct selection rate of the duration using elastic fixation was only 10.7%. Meanwhile, 42.9% of investigators refused to inoculate tetanus immunoglobulin after teeth replanting. Emergency management of dental avulsion (EM) and clinical management of dental avulsion (CM) answered correctly with average scores of 14.60±11.85 and 14.48±2.67, respectively. Multivariate linear regression analysis revealed that working years were negatively correlated with EM and CM scores (P<0.05). There was a positive correlation between CM and EM scores with the number of avulsion cases treated by physicians each year (P<0.05). In terms of the EM score of dentists' learning attitude, investigators who had received enough knowledge were higher than those who had not and insufficient knowledge reserved, and the difference was statistically significant (P<0.05). The scores of investigators who thought they had a certain degree of knowledge about dental trauma were higher than those who thought they "did not understand", and the difference was statistically significant (P<0.05). In terms of CM scores, investigators who thought the knowledge of dental trauma was "very helpful" had higher scores than those who thought it was "not helpful", and the difference was statistically significant (P<0.05). The scores of the investigators who thought they had "relatively sufficient knowledge" of dental trauma were higher than those who thought they had "no knowledge" or "insufficient know-ledge", and the difference was statistically significant (P<0.05).@*CONCLUSIONS@#The overall accuracy of the management of avulsed incisors among dentists was low in Guangdong province. Dentists were more likely to have a higher rate of accuracy choice in treatment options for luxation injury and avulsion to enhance the prognosis of replanted teeth.

A case of systemic juvenile idiopathic arthritis with an early manifestation of pulmonary ground-glass opacities combined with macrophage activation syndrome / 中国综合临床

Systemic juvenile idiopathic arthritis is one of the common rheumatic and immune diseases in children. It has a sudden onset, obvious systemic symptoms, and lung involvement. However, systemic juvenile idiopathic arthritis with an early manifestation of pulmonary ground-glass opacities combined with macrophage activation syndrome is rare. The clinical data of a child with systemic juvenile idiopathic arthritis with pulmonary ground-glass shadow and macrophage activation syndrome who was admitted to Hubei Maternal and Child Health Care Hospital affiliated to Tongji Medical College of Huazhong University of Science and Technology in December 2021 were analyzed retrospectively in order to improve the understanding of rheumatic diseases and pulmonary lesions. The child was admitted to the hospital for 10 days due to rash and fever. Thoracic CT showed scattered ground glass like shadows in both lungs due to the prevention and control screening of COVID-19 pneumonia epidemic situation. After admission, the child was still repeatedly flaccid with high fever, accompanied by dysfunction of both lower limbs. The knee joint MRI found that there was synovitis in the knee joint, and various laboratory indicators suggested macrophage activation syndrome. After that, systemic juvenile idiopathic arthritis was diagnosed. After being treated with methylprednisolone, cyclosporine and topzumab, the clinical remission and the ground-glass shadow of the lung basically disappeared. Through the analysis of this case, it is suggested that clinicians should not ignore other diseases that cause ground glass shadow in the lung during the current epidemic of COVID-19.

Study on bioequivalence evaluation of dexamethasone acetate tablets in Chinese healthy volunteers / 中国临床药理学与治疗学

AIM: To assess the bioequivalence of oral dexamethasone acetate tablets between the test and reference formulations in healthy adult Chinese subjects on an empty stomach and after meals. METHODS: A randomized, open, single-dose, two-cycle double crossover bioequivalence study was followed. Twenty-four healthy subjects were included in the fasting group, and 32 healthy subjects were included in the postprandial group, taking 2 tablets (0.75 mg/tablet) of the test formulation (T) or 3 tablets (0.50 mg/tablet) of the reference formulation (R) per cycle for two cycles. The concentrations of dexamethasone acetate in human plasma were determined using liquid chromatography-mass spectrometry, and the pharmacokinetic parameters were calculated according to the non-atrial model using WinNonlin 8.0 software.The bioequivalence of both the test formulation and the reference formulation was evaluated. RESULTS: The pharmacokinetic parameters after oral administration of dexamethasone acetate tablets in a fasted state in subjects with the reference formulation are as follows: Tmax 1.13 (0.50, 4.00) and 1.00 (0.50, 5.00) h, AUC0-t (72.25±21.55) and (69.23±17.76) ng · mL

Percutaneous contrast-enhanced ultrasound-guided transabdominal sac embolization is an effective technique for treating complicated type II endoleaks after endovascular aneurysm repair.

OBJECTIVE: In the present study, we evaluated and compared the outcomes of transarterial embolization with those of percutaneous contrast-enhanced ultrasound-guided transabdominal sac embolization (PUSE) for type II endoleaks (T2ELs). METHODS: A retrospective review was conducted of consecutive patients who had undergone T2EL embolization between January 2015 and December 2020 at our center. The cohort was divided into two groups according to the embolization approach: PUSE vs transarterial. Freedom from aneurysm growth, safety, immediate technical success, freedom from persistent T2ELs, and the repeat embolization rate were assessed. RESULTS: A total of 25 patients and 28 embolization procedures (PUSE, n = 16; transarterial embolization, n = 12) were examined. Both the fluoroscopic time (13.3 ± 3.2 minutes vs 35.0 ± 7.0 minutes; P < .001) and the procedural time (84.9 ± 8.4 minutes vs 117.1 ± 14.8 minutes; P < .001) were significantly shorter in the PUSE group than in the transarterial group. After the embolization procedure, the patients were followed up for a mean duration of 24.7 ± 14.9 months for the PUSE group and 35.9 ± 21.1 months for the transarterial group (P = .1323). Five patients in the transarterial group had undergone unsuccessful embolization, with success in 7 of the 12 patients in the transarterial group and all 16 patients in the PUSE group (P = .0081). Failure had resulted from failed transarterial access or a recurrent T2EL. Three of the five patients had undergone subsequent PUSE during follow-up. No patient in the PUSE group had experienced sac expansion compared with four patients in the transarterial group (P = .0242). Similarly, no patient in the PUSE group had developed a newly discovered T2EL vs four patients in the transarterial group (P = .0242). Thus, the outcomes were markedly better for the PUSE group than were those for the transarterial group. A major procedure-related complication (abdominal abscess) occurred in one patient in the transarterial group. CONCLUSIONS: PUSE is safe and effective for managing T2ELs. It yields better outcomes in terms of preventing aneurysm growth, decreasing the incidence of repeat embolization and complications, minimizing the recurrence of T2ELs, and reducing the fluoroscopic and procedural times. We, thus, regard it as the preferred approach for the management of T2ELs.

Klebsiella pneumoniae infection following H9N2 influenza A virus infection contributes to the development of pneumonia in mice.

In this study, whether H9N2 influenza A virus (IAV) infection contributed to secondary Klebsiella pneumoniae infection was investigated. From post-infection onwards, clinical symptoms were monitored, examined and recorded daily for 11 days. As a result, no clinical signs were observed in the mice infected with single H9N2 IAV, implying that H9N2 IAV was less pathogenic to mice. Compared to single K. pneumonia infection, K. pneumoniae infection following H9N2 IAV infection exacerbates lung histopathological lesions and apoptosis, resulting in more severe diseases. Lung index of the mice with H9N2 IAV and K. pneumoniae co-infection was significantly higher than those in the other groups. Bacterial loads in the tissues in H9N2 IAV and K. pneumoniae co-infection group were significantly higher than those in the single K. pneumoniae infection group at 7 dpi. It demonstrated that prior H9N2 IAV infection contributed to K. pneumonia proliferation and delayed bacterial clearance in mice. Secondary K. pneumoniae infection influences seroconversion of anti-H9N2 antibody titers and the cytokine profiles. The findings demonstrated that H9N2 IAV infection facilitated secondary K. pneumonia infection, causing severe the diseases in mice.

Effect of lipopolysaccharide-stimulated exosomes from human dental pulp stem cells combined with stromal cell-derived factor-1 on dental pulp regeneration / 中华口腔医学杂志

Objective: To investigate the effect of exosomes from mild-inflammation- stimulated human dental pulp stem cells (hDPSC) combined with stromal cell-derived factor-1 (SDF-1) on dental pulp regeneration in rats. Methods: Primary hDPSCs were isolated, cultured and then stimulated by using lipopolysaccharide (LPS). The exosomes from the hDPSCs with (L-EXO) or without (N-EXO) LPS were extracted by overspeed differential centrifugation and were identified by transmission electron microscopy and Western blotting. Forty SD rats, aged 6-8 weeks, were equally divided into S group (SDF-1 alone), L+S group (L-EXO combined with SDF-1), N+S group (N-EXO combined with SDF-1) and blank control group (no substance implanted into the root canal) by random number table method. Bilateral mandibular first molars were used as the experimental teeth to establish pulpless root canal models and different contents were implanted into the root canals according to the groups. All rats were over-anesthetized and sacrificed at the 30th day after content implantation. Bilateral mandibular tissues were taken for histological evaluation by means of HE, Masson and immunohistochemical stainings. Results: The HE staining showed new pulp-like tissue in the root canals of all three experimental groups. The amount of new tissues and the number of cells in the tissues were greatest in L+S group and least in S group. Masson staining showed that the mineralized tissue in L+S group was arranged longitudinally along the root canal wall and the collagen fibers were arranged in an orderly fashion, while those in N+S group showed an irregular and disordered distribution. Quantitative analysis of the area of neovascularization in each group showed that the density of vessels in the L+S group [(2.03±0.65)%] was significantly higher than that in the S group [(0.65±0.05)%] and the N+S group [(1.06±0.38)%] respectively (F=5.879, P<0.05). Immunohistochemical staining showed that the expression of CXC chemokine receptor 4 (CXCR4) was significantly lower in S and L+S groups than in N+S group, with a statistically significant difference (F=8.633, P<0.01). Conclusions: Exosomes secreted by hDPSCs combined with SDF-1 might increase the amount of new tissue in the root canal and the density of blood vessels in the tissue. L-EXO showed a stronger effect than N-EXO did. The combination of L-EXO with SDF-1 might result in more regular arrangement of mineralized tissue and collagen fibers in the regenerative tissues.

Effects of empathy nursing on negative emotion, sleep quality and health literacy of home treatment patients with pulmonary tuberculosis / 中国实用护理杂志

Objective:To explore the effect of empathy nursing intervention on negative emotion, sleep quality and health literacy of patients with pulmonary tuberculosis.Methods:A total of 77 patients in Department of Infectious Diseases of People′s Hospital of Leshan from June 2019 to September 2020 were divided into intervention group ( n=39) and control group ( n=38) by random digits table method. The patients in the control group were given routine nursing, and the patients in the intervention group were given empathy nursing intervention on the basis of routine nursing. Hamilton Anxiety Scale (HAMA), Hamilton Depression Scale (HAMD), Pittsburgh Sleep Quality Index (PSQI) and Health Literacy Management Scale (HeLMS) were used before and 12 weeks after intervention to evaluate the effects. Results:There was no significant difference in the total scores of HAMD, HAMA, PSQI and HeLMS between the two groups before intervention ( P>0.05), but after intervention, the scores of HAMD and HAMA in the intervention group were 10.64 ± 1.86, 12.64 ± 2.12, lower than those in the control group (14.63 ± 2.19, 15.11 ± 2.71). The differences were statistically significant ( t=-8.63, -4.46, P<0.05). The total score of PSQI and the scores of daytime dysfunction, use of hypnotic drugs, time of falling asleep, time of sleep, sleep quality, sleep disorder and sleep efficiency in the intervention group were 10.26 ± 1.65, 1.22 ± 0.22, 1.48 ± 0.23, 1.51 ± 0.27, 1.45 ± 0.26, 1.57 ± 0.22, 1.54 ± 0.21,1.49 ± 0.24, lower than those in the control group (13.07 ± 2.14, 1.92 ± 0.31, 1.75 ± 0.34, 1.95 ± 0.29, 2.02 ± 0.33, 1.84 ± 0.31, 1.72 ± 0.27, 1.87 ± 0.29). The differences were statistically significant ( t values were -11.45--3.27, all P<0.05). The total score of HeLMS and the scores of information acquisition, communication and interaction, and health improvement intention in the intervention group were 96.12 ± 14.71, 37.87 ± 5.83, 35.91 ± 5.13, 16.21 ± 2.53, higher than those in the control group (86.35 ± 14.12, 33.17 ± 5.27, 32.87 ± 5.42, 14.16 ± 2.19). The differences were statistically significant ( t values were 2.53-3.80, all P<0.05). Conclusions:Empathy nursing intervention can effectively alleviate the negative emotions of pulmonary tuberculosis patients, improve their sleep quality, and improve their health literacy level.

Microenvironmental stiffness mediates cytoskeleton re-organization in chondrocytes through laminin-FAK mechanotransduction / 国际口腔科学杂志·英文版

Microenvironmental biophysical factors play a fundamental role in controlling cell behaviors including cell morphology, proliferation, adhesion and differentiation, and even determining the cell fate. Cells are able to actively sense the surrounding mechanical microenvironment and change their cellular morphology to adapt to it. Although cell morphological changes have been considered to be the first and most important step in the interaction between cells and their mechanical microenvironment, their regulatory network is not completely clear. In the current study, we generated silicon-based elastomer polydimethylsiloxane (PDMS) substrates with stiff (15:1, PDMS elastomer vs. curing agent) and soft (45:1) stiffnesses, which showed the Young's moduli of ~450 kPa and 46 kPa, respectively, and elucidated a new path in cytoskeleton re-organization in chondrocytes in response to changed substrate stiffnesses by characterizing the axis shift from the secreted extracellular protein laminin β1, focal adhesion complex protein FAK to microfilament bundling. We first showed the cellular cytoskeleton changes in chondrocytes by characterizing the cell spreading area and cellular synapses. We then found the changes of secreted extracellular linkage protein, laminin β1, and focal adhesion complex protein, FAK, in chondrocytes in response to different substrate stiffnesses. These two proteins were shown to be directly interacted by Co-IP and colocalization. We next showed that impact of FAK on the cytoskeleton organization by showing the changes of microfilament bundles and found the potential intermediate regulators. Taking together, this modulation axis of laminin β1-FAK-microfilament could enlarge our understanding about the interdependence among mechanosensing, mechanotransduction, and cytoskeleton re-organization.

Effects of intermittent theta-burst stimulation on functional connectivity in patients with mild cognitive impairment / 中华行为医学与脑科学杂志

Objective:To investigate the effects of single intermittent theta-burst stimulation on functional connectivity in patients with mild cognitive impairment(MCI).Methods:From July to November 2020, forty MCI patients were selected and randomly divided into iTBS true stimulation group and iTBS sham-stimulation group, with 20 patients in each group.iTBS targeted the left dorsolateral prefrontal cortex (DLPFC). Montreal cognitive assessment (MoCA), mini-mental state examination (MMSE), activity of daily living scale(ADL), Hamilton depression scale (HAMD) and Hamilton anxiety scale (HAMA) were evaluated at baseline.The resting state electroencephalography (rsEEG) was collected for 5 minutes before and after iTBS in the two groups.The phase lag index(PLI) of EEG functional connectivity was calculated, and the functional connectivity matrix diagram was drawn.SPSS 26.0 software was used for statistical analysis.Data were statistically analyzed by χ2 test, Wilcoxon rank sum test and independent sample t-test. Results:There were no significant differences in scores of MoCA, ADL, HAMD and HAMA between the two groups(all P>0.05). In the iTBS true stimulation group, compared with that before iTBS treatment(0.140(0.133, 0.144)), the PLI of β band increased significantly after iTBS treatment(0.146(0.136, 0.167))( P<0.05). The region of increased PLI was mainly concentrated in the central region(C3/C4-T7/T8). Compared with that before iTBS treatment(0.251(0.232, 0.299)), the PLI of α band increased after iTBS treatment(0.286(0.241, 0.359)), but the difference was not statistically significant( P>0.05). Conclusion:Single iTBS treatment can significantly increase the EEG functional connectivity in patients with MCI, indicating that iTBS targeting the left DLPFC can effectively regulate the EEG functional connectivity in patients with MCI, which may reveal the mechanism of iTBS in improving cognitive function in patients with MCI.

Mechanism of Huangqintang in Alleviating Side Effect of Chemotherapy for Endometrial Cancer Based on Network Pharmacology and Molecular Docking / 中国实验方剂学杂志

ObjectiveTo evaluate the utility and mechanism of Huangqintang combined with carboplatin in chemotherapy of endometrial cancer by experiments as well as network pharmacology and molecular docking. MethodThe xenograft model of endometrial carcinoma was induced in BALB/c nude mice. When the tumor volume reached about 100 mm3，24 nude mice were randomly assigned into a model group， a Huangqintang group （3.5 g·kg-1），a carboplatin group （50 mg·kg-1），and a combination group （3.5 g·kg-1 Huangqintang + 50 mg·kg-1 carboplatin）， with six mice in each group. The mice in the model group received 200 μL of normal saline by gavage， twice a day. The volume of the tumor and the body weight of the mice were measured every two days. After drug intervention for 20 days， the blood of the mice was collected for renal function and blood routine tests. Then the nude mice were euthanized and the tumor was weighted. In combination with the experimental results，the underlying mechanism of Huangqintang combined carboplatin was predicted through network pharmacology and the binding sites of active components were predicted by molecular docking. ResultThe tumor inhibition rates of the Huangqintang group，the carboplatin group， and the combination group were 8.87%，50.33% （P<0.05），and 64.66% （P<0.01），respectively. Compared with the results in the model group，the body weight，leukocyte，erythrocyte， and hemoglobin in the carboplatin group decreased，and creatinine and uric acid increased （P<0.05）. Compared with the carboplatin group，the combination group showed increased body weight，leukocyte， and hemoglobin （P<0.05），and decreased creatinine and uric acid （P<0.05）. A total of 114 potential active components of Huangqintang involved 200 targets related to the side effects of carboplatin. The core genes involved were mainly heat shock protein 90AA1 （HSP90AA1），transcription factor c-Jun （JUN）， and mitogen-activated protein kinase （MAPK）. Molecular docking showed that baicalein and wogonin could form a stable protein complex with HSP90AA1， serving as potential active molecules. Kyoto Encyclopedia of Genes and Genomes （KEGG） analysis revealed that it might be related to the regulation of tumor necrosis factor（TNF） signaling pathway，interleukin（IL）-17 signaling pathway， MAPK signaling pathway， and toll-like receptor pathway. ConclusionHuangqintang has no obvious inhibitory effect on endometrial cancer，and the tumor suppression effect is not significantly enhanced after combination with carboplatin，but Huangqintang can alleviate carboplatin-induced side effects. The mechanism may be related to the complex network of Chinese medicine.

Molecular Mechanism of Resveratrol Against NAFLD Based on Network Pharmacology / 中国实验方剂学杂志

ObjectiveTo predict the molecular mechanism of resveratrol against non-alcoholic fatty liver disease （NAFLD） based on network pharmacology and molecular docking and verify the results on the liver cell model induced by PM2.5 exposure. MethodThe targets of resveratrol were screened out from Traditional Chinese Medicine System Pharmacology Database and Analysis Platform （TCMSP）， PubChem， DrugBank， and SwissTargetPrediction， and the potential targets of NAFLD were retrieved from Comparative Toxicogenomics Database （CTD）， DisGeNET， GeneCards， and Online Mendelian Inheritance in Man （OMIM）. Then the common targets were obtained. STRING 11.5 was used to construct the protein-protein interaction （PPI） network of the common targets. Cytoscape 3.8.2 was used to plot the “target-pathway” network， and the core modules and key targets were selected. Metascape was adopted for Gene Ontology （GO） and Kyoto encyclopedia of genes and genomes （KEGG） enrichment analyses of common targets. SYBYL-X 2.0 was used for molecular docking of resveratrol to key targets. Finally，cell apoptosis and the expression of apoptosis-related proteins were detected by flow cytometry and Western blot in the PM2.5-exposed human liver cell line （HepG2）. ResultA total of 115 common targets of resveratrol and NAFLD were obtained. The key targets included tumor necrosis factor （TNF）， B-cell lymphoma-2 （Bcl-2）， and cysteinyl aspartate-specific protease-3（Caspase-3）. As revealed by KEGG enrichment analysis， 174 signaling pathways， represented by the apoptosis and TNF signaling pathways， were obtained. Molecular docking results showed that resveratrol had strong binding activities to Bcl-2 and Caspase-3. Furthermore，the results of flow cytometry and Western blot demonstrated that resveratrol inhibited cell apoptosis of PM2.5-exposed HepG2 cells by regulating the protein expression of Bcl-2 and Caspase-3. ConclusionResveratrol can treat NAFLD in a multi-pathway and multi-target way. It mainly inhibits liver cell apoptosis by affecting the expression of Bcl-2 and Caspase-3， which provides a theoretical basis for the follow-up research on the anti-NAFLD mechanism of resveratrol.