Aim To investigate the role and mecha-nism of CXC chemokine receptor 3(CXCR3)in hepa-toblastoma(HB).Methods The expression of CX-CR3 was detected by immunohistochemical and West-ern blot in 16 cases of HB tissue and adjacent normal liver tissue.The HB cells(Huh-6 and HepT1)were transfected with Con-shRNA,CXCR3-shRNA1,and CXCR3-shRNA2,respectively,and then divided into the Con-shRNA group,CXCR3-shRNA1 group,and CXCR3-shRNA2 group.Cell proliferation was detected by CCK-8 assay and EdU staining.Cell migration and invasion were detected by scratch and Transwell as-says.The expressions of β-catenin,c-Myc,cyclin D1,MMP-7 and MMP-9 were detected by Western blot.The tumor formation and tumor volume in each group were assessed using nude mouse xenograft tumor model,while the expressions of MMP-9 and Ki67 in tumor tissue were examined by immunohistochemistry.Results The expression of CXCR3 was up-regulated in HB tissue(P＜0.01).Compared to the Con-shR-NA group,the viability,proliferation,migration and invasion of Huh-6 and HepT1 cells in the CXCR3-shR-NA1 and CXCR3-shRNA2 groups were reduced(P＜0.01),the expressions of the Wnt/β-catenin signaling pathway related proteins were attenuated(P＜0.01),the tumor grew slowly and the volume was significantly reduced(P＜0.01),and the expressions of MMP-9 and Ki67 in tumor tissue decreased(P＜0.01).Con-clusions Downregulation of CXCR3 hinders the pro-liferation and migration of HB cells,potentially as-cribed to the attenuation of Wnt/β-catenin signaling regulation.

Objective To analyze the genetic subtypes of human immunodeficiency virus (HIV) and the prevalence of pretreatment drug resistance in the newly reported HIV-infected men in Guangxi. Methods The stratified random sampling method was employed to select the newly reported HIV-infected men aged≥50 years old in 14 cities of Guangxi from January to June in 2020.The pol gene of HIV-1 was amplified by nested reverse transcription polymerase chain reaction and then sequenced.The mutation sites associated with drug resistance and the degree of drug resistance were then analyzed. Results A total of 615 HIV-infected men were included in the study.The genetic subtypes of CRF01_AE,CRF07_BC,and CRF08_BC accounted for 57.4% (353/615),17.1% (105/615),and 22.4% (138/615),respectively.The mutations associated with the resistance to nucleoside reverse transcriptase inhibitors (NRTI),non-nucleoside reverse transcriptase inhibitors (NNRTI),and protease inhibitors occurred in 8 (1.3%),18 (2.9%),and 0 patients,respectively.M184V (0.7%) and K103N (1.8%) were the mutations with the highest occurrence rates for the resistance to NRTIs and NNRTIs,respectively.Twenty-two (3.6%) patients were resistant to at least one type of inhibitors.Specifically,4 (0.7%),14 (2.3%),4 (0.7%),and 0 patients were resistant to NRTIs,NNRTIs,both NRTIs and NNRTIs,and protease inhibitors,respectively.The pretreatment resistance to NNRTIs had much higher frequency than that to NRTIs (2.9% vs.1.3%;χ²=3.929,P=0.047).The prevalence of pretreatment resistance to lamivudine,zidovudine,tenofovir,abacavir,rilpivirine,efavirenz,nevirapine,and lopinavir/ritonavir was 0.8%, 0.3%, 0.7%, 1.0%, 1.3%, 2.8%, 2.9%, and 0, respectively. Conclusions CRF01_AE,CRF07_BC,and CRF08_BC are the three major strains of HIV-infected men≥50 years old newly reported in Guangxi,2020,and the pretreatment drug resistance demonstrates low prevalence.
Male ; Humans ; Middle Aged ; Reverse Transcriptase Inhibitors/therapeutic use* ; HIV Infections/drug therapy* ; Drug Resistance, Viral/genetics* ; China/epidemiology* ; Mutation ; HIV-1/genetics* ; Protease Inhibitors/therapeutic use* ; Genotype

OBJECTIVES: To investigate the clinical treatment outcomes and the changes of the outcomes over time in extremely preterm twins in Guangdong Province, China. METHODS: A retrospective analysis was performed for 269 pairs of extremely preterm twins with a gestational age of <28 weeks who were admitted to the department of neonatology in 26 grade A tertiary hospitals in Guangdong Province from January 2008 to December 2017. According to the admission time, they were divided into two groups: 2008-2012 and 2013-2017. Besides, each pair of twins was divided into the heavier infant and the lighter infant subgroups according to birth weight. The perinatal data of mothers and hospitalization data of neonates were collected. The survival rate of twins and the incidence rate of complications were compared between the 2008-2012 and 2013-2017 groups. RESULTS: Compared with the 2008-2012 group, the 2013-2017 group (both the heavier infant and lighter infant subgroups) had lower incidence rates of severe asphyxia and smaller head circumference at birth (P<0.05). The mortality rates of both of the twins, the heavier infant of the twins, and the lighter infant of the twins were lower in the 2013-2017 group compared with the 2008-2012 group (P<0.05). Compared with the 2008-2012 group, the 2013-2017 group (both the heavier infant and lighter infant subgroups) had lower incidence rates of pulmonary hemorrhage, patent ductus arteriosus (PDA), periventricular-intraventricular hemorrhage (P-IVH), and neonatal respiratory distress syndrome (NRDS) and a higher incidence rate of bronchopulmonary dysplasia (P<0.05). CONCLUSIONS There is a significant increase in the survival rate over time in extremely preterm twins with a gestational age of <28 weeks in the 26 grade A tertiary hospitals in Guangdong Province. The incidences of severe asphyxia, pulmonary hemorrhage, PDA, P-IVH, and NRDS decrease in both the heavier and lighter infants of the twins, but the incidence of bronchopulmonary dysplasia increases. With the improvement of diagnosis and treatment, the multidisciplinary collaboration between different fields of fetal medicine including prenatal diagnosis, obstetrics, and neonatology is needed in the future to jointly develop management strategies for twin pregnancy.
Bronchopulmonary Dysplasia/epidemiology* ; Female ; Gestational Age ; Humans ; Infant ; Infant, Extremely Premature ; Infant, Newborn ; Pregnancy ; Respiratory Distress Syndrome, Newborn/epidemiology* ; Retrospective Studies ; Treatment Outcome

OBJECTIVES: To reconstruct the cases of acceleration craniocerebral injury caused by blunt in forensic cases by finite element method (FEM), and to study the biomechanical mechanism and quantitative evaluation method of blunt craniocerebral injury. METHODS: Based on the established and validated finite element head model of Chinese people, the finite element model of common injury tool was established with reference to practical cases in the forensic identification, and the blunt craniocerebral injury cases were reconstructed by simulation software. The cases were evaluated quantitatively by analyzing the biomechanical parameters such as intracranial pressure, von Mises stress and the maximum principal strain of brain tissue. RESULTS: In case 1, when the left temporal parietal was hit with a round wooden stick for the first time, the maximum intracranial pressure was 359 kPa; the maximum von Mises stress of brain tissue was 3.03 kPa at the left temporal parietal; the maximum principal strain of brain tissue was 0.016 at the left temporal parietal. When the right temporal was hit with a square wooden stick for the second time, the maximum intracranial pressure was 890 kPa; the maximum von Mises stress of brain tissue was 14.79 kPa at the bottom of right temporal lobe; the maximum principal strain of brain tissue was 0.103 at the bottom of the right temporal lobe. The linear fractures occurred at the right temporal parietal skull and the right middle cranial fossa. In case 2, when the forehead and left temporal parietal were hit with a round wooden stick, the maximum intracranial pressure was 370 kPa and 1 241 kPa respectively, the maximum von Mises stress of brain tissue was 3.66 kPa and 26.73 kPa respectively at the frontal lobe and left temporal parietal lobe, and the maximum principal strain of brain tissue was 0.021 and 0.116 respectively at the frontal lobe and left temporal parietal lobe. The linear fracture occurred at the left posterior skull of the coronary suture. The damage evaluation indicators of the simulation results of the two cases exceeded their damage threshold, and the predicted craniocerebral injury sites and fractures were basically consistent with the results of the autopsy. CONCLUSIONS The FEM can quantitatively evaluate the degree of blunt craniocerebral injury. The FEM combined with traditional method will become a powerful tool in forensic craniocerebral injury identification and will also become an effective means to realize the visualization of forensic evidence in court.
Humans ; Finite Element Analysis ; Biomechanical Phenomena ; Wounds, Nonpenetrating ; Head ; Craniocerebral Trauma

OBJECTIVES: To analyze and predict the striking velocity range of stick blunt instruments in different populations, and to provide basic data for the biomechanical analysis of blunt force injuries in forensic identification. METHODS: Based on the Photron FASTCAM SA3 high-speed camera, Photron FASTCAM Viewer 4.0 and SPSS 26.0 software, the tester's maximum striking velocity of stick blunt instruments and related factors were calculated and analyzed, and inputed to the backpropagation (BP) neural network for training. The trained and verified BP neural network was used as the prediction model. RESULTS: A total of 180 cases were tested and 470 pieces of data were measured. The maximum striking velocity range was 11.30-35.99 m/s. Among them, there were 122 female data, the maximum striking velocity range was 11.63-29.14 m/s; there were 348 male data, the maximum striking velocity range was 20.11-35.99 m/s. The maximum striking velocity of stick blunt instruments increased with the increase of weight and height, but there was no obvious increase trend in the male group; the maximum striking velocity decreased with age, but there was no obvious downward trend in the female group. The maximum striking velocity of stick blunt instruments has no significant correlation with the material and strike posture. The root mean square error (RMSE), the mean absolute error (MAE) and the coefficient of determination (R²) of the prediction results by using BP neural network were 2.16, 1.63 and 0.92, respectively. CONCLUSIONS The prediction model of BP neural network can meet the demand of predicting the maximum striking velocity of different populations.
Male ; Humans ; Female ; Neural Networks, Computer ; Software ; Wounds, Nonpenetrating ; Forensic Medicine

OBJECTIVE: To retrospectively analyze the efficacy and safety of pegylated recombinant human granulocyte colony-stimulating factor (PEG-rhG-CSF) in hematopoietic stem cell mobilization in 71 normal healthy donors for allogeneic hematopoietic stem cell transplantation (allo-HSCT). METHODS: From March 2018 to July 2019, 71 patients received allo-HSCT in The General Hospital of Western Theater Command were enrolled in the study, a single dose of PEG-rhG-CSF was injected subcutaneously at 12 mg to all the stem cell donors. After injection for 4 days, CD34 RESULTS: Seventy-one healthy stem cell donors included 39 males and 32 females with a median age of 38 (16-58) years old. The median number of CD34 CONCLUSION For allo-HSCT donor mobilization, PEG-rh-G-CSF is effective, safe, and convenient, providing more options for HSC mobilization.
Adult ; Antigens, CD34 ; Female ; Graft vs Host Disease ; Granulocyte Colony-Stimulating Factor ; Hematopoietic Stem Cell Mobilization ; Hematopoietic Stem Cell Transplantation ; Humans ; Male ; Middle Aged ; Recombinant Proteins ; Retrospective Studies

Nonalcoholic fatty liver disease (NAFLD) is regarded as the most common liver disease with no approved therapeutic drug currently. Silymarin, an extract from the seeds of Silybum marianum, has been used for centuries for the treatment of various liver diseases. Although the hepatoprotective effect of silybin against NAFLD is widely accepted, the underlying mechanism and therapeutic target remain unclear. In this study, NAFLD mice caused by methionine-choline deficient (MCD) diet were orally administrated with silybin to explore the possible mechanism and target. To clarify the contribution of peroxisome proliferator-activated receptor α (PPARα), PPARα antagonist GW6471 was co-administrated with silybin to NAFLD mice. Since silybin was proven as a PPARα partial agonist, the combined effect of silybin with PPARα agonist, fenofibrate, was then evaluated in NAFLD mice. Serum and liver samples were collected to analyze the pharmacological efficacy and expression of PPARα and its targets. As expected, silybin significantly protected mice from MCD-induced NAFLD. Furthermore, silybin reduced lipid accumulation via activating PPARα, inducing the expression of liver cytosolic fatty acid-binding protein, carnitine palmitoyltransferase (Cpt)-1a, Cpt-2, medium chain acyl-CoA dehydrogenase and stearoyl-CoA desaturase-1, and suppressing fatty acid synthase and acetyl-CoA carboxylase α. GW6471 abolished the effect of silybin on PPARα signal and hepatoprotective effect against NAFLD. Moreover, as a partial agonist for PPARα, silybin impaired the powerful lipid-lowering effect of fenofibrate when used together. Taken together, silybin protected mice against NAFLD via activating PPARα to diminish lipid accumulation and it is not suggested to simultaneously take silybin and classical PPARα agonists for NAFLD therapy.

Objective: To observe the intervention effect of auricular point sticking on dry eye in myopia patients after small-incision lenticule extraction (SMILE) surgery.Methods: This was a prospective randomized controlled study conducted among the myopia patients who received SMILE surgery at Eye and ENT Hospital of Fudan University. The post-SMILE operation patients who screened by the inclusion and exclusion criteria were randomized into a control group and a treatment group. Patients in the control group were given 0.1％ fluorometholone and 0.5％ carboxymethylcellulose sodium eye drops, while the treatment group was given additional unilateral auricular point sticking for 1 month. The patients were estimated using ocular surface disease index (OSDI), Schirmer tear test-1 (STT-1), tear film break-up time (TF-BUT), corneal fluorescein staining (CFS) score, corneal sensitivity (CS) and visual quality (VQ) at 1 d, 1 week and 1 month after surgery; the changes in anxiety and depression were also observed in the patients. Results: Compared with the first day after operation, CS in the nasal region was improved in the treatment group, and the VQ score increased in the control group patients at 1 week after operation (both P<0.05); at 1 month after operation, the TF-BUT increased, CFS score decreased, CS in the central and nasal regions increased (all P<0.05), and VQ score increased (P<0.01) in the treatment group, and the CS in the central, upper, lower and nasal regions were improved (all P<0.05), and VQ score increased (P<0.01) in the control group. The between-group comparison showed that the differences in the change of TF-BUT were statistically significant at 1 week and 1 month after surgery, respectively (both P<0.05). Conclusion: Auricular point sticking therapy can increase the TF-BUT and accelerate the repair of ocular surface function in post-SMILE patients.

Objective:To evaluate the scientificity and feasibility of processing of Pinelliae Rhizoma by hot water washing （Tangxi）， and to provide reference for the development of related famous classical formulas. Method:Processing method of Pinelliae Rhizoma washed by hot water was established based on ancient Tangxi processing method， and the process conditions were optimized by single factor tests. The weight， moisture， ash， extract， total acid （calculated by succinic acid） contents and high performance liquid chromatography （HPLC） fingerprint of Pinelliae Rhizoma were compared before and after processing. In addition， the rabbit eye irritation test was conducted to evaluate the toxicity changes. Result:The processing method of Pinelliae Rhizoma washed by hot water was as following：washed by 4 times the amount of hot water at 80 ℃ for 10 times until clear water， transfused cross-section after incision， no or slight numbness in the mouth. The average moisture， ash， extract contents of Pinelliae Rhizoma washed by hot water were 9.34%， 1.71% and 4.22%， respectively. After being processed， the decline rates of weight and total acid content of Pinelliae Rhizoma were 7.49% and 43.31%. The HPLC fingerprint of Pinelliae Rhizoma before and after washing showed a decrease in all components， but there was no new chromatographic peak， and peak 9 （adenosine） reduced significantly. The results of rabbit eye irritation test showed that there was no obvious eye conjunctival irritation after washing， indicating that the toxicity of Pinelliae Rhizoma decreased obviously after washing. Conclusion:The established method of Pinelliae Rhizoma by Tangxi processing is stable and feasible， the aqueous extract of Pinelliae Rhizoma has no obvious eye conjunctival irritation after washing.

Functional near-infrared spectroscopy (fNIRS) is a non-invasive functional brain imaging technology, which has been used in observing activation of affected brain area and compensation of unaffected side for stroke patients, as well as the assistance of diagnosis for some other neurological diseases.