Aim To investigate the effect of Tetramethylpyrazine (TMP) on the proliferation of airway smooth muscle cells (ASMCs). Methods Primary ASMCs of rats were cultured. The absorbance (A490) value of ASMCs treatment with platelet-derived growth factor (PDGF) in the presence of TMP was detected by MTTto observe the anti-proliferation of TMP. The levels of ERK1/2 and p-ERK1/2 proteins were determined by Western blot.Results In presence of the TMP with different concentrations (12.5,25,50,100 and 200 ?mol?L-1) at 6,12,24,36 and 48 hours,compared with control groups,the average inhibitory rates of cell proliferation in all groups were increased significantly (P

Objective:Primary gastric choriocarcinoma (PGC) is a rare tumor. This study aimed to analyze cases reported in Chi-nese and two cases in our hospital. This study was also conducted to investigate the clinical characteristics and treatment of PGC. Meth-ods:The Chinese Medical Current Contents and China Biology Medicine database was retrieved with the following terms:primary gas-tric choriocarcinoma, stomach choriocarcinoma, and ectopic choriocarcinoma. The clinical data in published literature were retrospec-tively analyzed. Two cases from our hospital were also retrospectively analyzed. Results:A total of 16 patients with PGC (14 case stud-ies and 2 cases from our hospital) were included in this study. The average age of the patients was 57.69 years (ranging from 42 years to 79 years). Among the 16 patients, 4 were females and 12 were males. The main clinical manifestation was abdominal discomfort (12/16). Laboratory and imaging tests were non-specific, but HCG-βin all of the patients increased (11/11). Organ or lymph node metasta-sis was found in 13 patients, including 6 cases in which two or more organs showed metastasis. These organs were primarily the liver, the stomach lymph nodes, the lungs, the brain, and the abdominal cavity. Pathological examination results showed that 12 of the 16 cas-es displayed ulcers with necrosis and hemorrhage. The four remaining cases manifested lesions. Lesions may occur in the stomach less-er curvature (5 cases), stomach sinus (6 cases), cardiac (2 cases), and gastric body (3 cases). The histological components of PGC co-ex-isted with other factors, such as adenocarcinoma (7 cases), adenocarcinoma and squamous (2 cases), adenocarcinoma and a signet ring cell (1 case), or pure choriocarcinoma (6 cases). Surgery combined with chemotherapy was the main treatment. A total of 14 patients un-derwent surgical operations. Among these patients seven underwent chemotherapy after surgery and one underwent chemotherapy. Among the 10 patients who were followed up, 8 died within six months after diagnosis. Conclusion:PGC is a rare stomach cancer with poor prognosis and primarily affects older men. No characteristic clinical manifestations were observed, but HCG-βas a specific serum tumor biomarker increased in all of the affected patients. Histological components co-existed with other stomach cancers. Surgical exci-sion combined with chemotherapy was the preferred treatment in early stages, and systemic chemotherapy was the recommended treat-ment in advanced stages.

The aim of the present study is to investigate the effects of Vam3 which is one of the dihydroxystilbene compounds on expressions of ICAM-1 in the lungs of OVA-induced asthmatic mice and the mechanisms of anti-airway inflammation. Balb/c mice were challenged with OVA inhalation. Lung tissues were stained with Mayer's hematoxylin and eosin for histopathologic examination. The expression of ICAM-1 in the lungs of mice was analyzed by Western blotting and immunohistochemistry method. The NF-kappaB activities were detected by NF-kappaB-luc reporter genetic transient transfection method. The activities of MMP-9 induced by LPS, TNF-alpha and PMA in THP-1 cells were determined by gelatin zymography method. The results showed that Vam3 could inhibit the expression of ICAM-1 in the OVA-induced mouse model. In addition, Vam3 could significantly suppress the activities of NF-kappaB in A549 cells and MMP-9 in THP-1 cells induced by LPS, TNF-alpha and PMA. These results suggested that Vam3 could alleviate the asthmatic inflammation by decreasing ICAM-1 expression in asthmatic mice, down regulating NF-kappaB and MMP-9 activities. Compound Vam3 showed inhibitory effects on inflammatory signal pathways involved in asthma.

Objective To investigate the effect of right stellate ganglion block(SGB)on postoper-ative shoulder pain in patients receiving laparoscopic cholecystectomy(LC).Methods A total of 104 pa-tients scheduled for LC from April to August 2022,32 males and 72 females,aged 18-64 years,ASA phys-ical status Ⅰ orⅡ,were selected and randomized into two groups:the stellate ganglion block group(group S,n = 51)and the control group(group C,n = 53).Immediately after intubation,0.2%ropivacaine 4 ml was used for ultrasound-guided right SGB in group S,and saline 4 ml was injected at the same site in group C.The number of cases of post-laparoscopic shoulder pain(PLSP)and the duration of PLSP were re-corded within 48 hours after operation.The VAS pain scores of PLSP were recorded to assess the level of PLSP immediately after operation(T1),2 hours after operation(T2),6 hours after operation(T3),12 hours after operation(T4),24 hours after operation(T5),and 48 hours after operation(T6).The number of effective compressions of the PCIA pump and the salvage analgesia were recorded.The adverse reactions such as nausea,vomiting,and abdominal distension were recorded.Results The incidence of PLSP and the rate of patients with PLSP lasting more than 10 hours in group S was significantly lower than those in group C(P＜0.05),and the degree of PLSP in group S was significantly lower than that in group C at T3-T5(P＜0.05).The number of effective compressions of the PCIA pump and the salvage analgesia rate in group S was significantly lower than those in group C(P＜0.05).The incidence of nausea in group S was significantly lower than that in group C(P＜0.05).Conclusion Right stellate ganglion block can reduce the incidence of PLSP in patients receiving LC,relieve the pain degree of PLSP,and reduce the incidence of adverse reactions.

Objective To explore the MRI characteristics of anatomy and injuries of the tendons and ligaments in the midfoot.Methods Twenty healthy volunteers and 46 patients with midfoot trauma were selected for retrospective analysis.All subjects underwent examination on MR T1WI and proton density-fat suppression(PD FS)scans on three planes,respectively.Then the MRI features of tendon and ligaments injury were compared.Results The tendons and ligaments of 20 healthy volunteers(40 lateral feet)showed homogeneous low signal intensity with varing thickness.The anterior tibialis tendons showed a thin linear shape,and the posterior tibialis tendons showed a slightly thick band with uniform low signal intensity,and the calcaneonavicular ligament showed thin linelike low signal in different directions.In the 46 patients with midfoot injuries,there were 16 cases of anterior tibialis tendons injuries,18 cases of posterior tibialis tendons injuries,and 12 cases of calcaneonavicular ligament injuries.According to the MRI findings,the degree of injuries of tendons and ligaments was divided into injury,partial tear,and complete rupture.Conclusion MRI can clearly show the anatomy and injury features of ligaments and tendons in midfoot,which is of important value for the early diagnosis and accurate treatment of the ligaments and tendons injuries.

In the recent years, the damage of the spleen has been increased due to trauma or neoplastic diseases. Traditional view holds the point that the damaged spleen should be completely removed, but with the development of spleen surgery, the important physiological function of the spleen has been widely recognized, and partial splenectomy has been well recognized by the surgeons. This paper summarized the clinical experience in partial splenectomy and raised some technical points.

OBJECTIVE: To study the mechanism of tumor necrosis factor( TNF)-α and its receptor( TNFR) signal transduction pathways in regulating cell apoptosis of alveolar macrophage( AM) in coal workers' pneumoconiosis( CWP).METHODS: Twenty-four coal workers with pneumoconiosis at stage Ⅰ were selected as CWP group and four observation subjects exposed to coal were chosen as observation group by using simple random sampling method. The bronchoalveolar lavage fluids of whole-lung lavage of two groups were collected. AMs were separated and purified. Then they were divided into 6 groups: a control group,a superoxide dismutase( SOD) group,a TNF/TNFR group,an anti-TNF-α antibody group,a Caspase-8 suppression group and a nuclear factor-κB( NF-κB) suppression group. The AMs of 6 groups with corresponding treatment were cultivated. After 24 hours,the cells were harvested and proteins extracted. The relative expression of TNF-α,TNFR1,TNFR2,Caspase-8,Caspase-3,NF-κB P50 and NF-κB P65 protein was detected by Western blotting. RESULTS: The protein relative expression of TNF-α,TNFR2,Caspase-8,Caspase-3,NF-κB P50 and NF-κB P65 in CWP group was significantly higher than those in the observation group( P < 0. 05). The protein relative expression of TNF-α,TNFR1,Caspase-8,Caspase-3 and NF-κB P50 in the TNF/TNFR group and the anti-TNF-αantibody group was lower than that of the control group( P < 0. 05). The above indexes in the anti-TNF-α antibody group were lower than that of the NF-κB suppression group( P < 0. 05). The protein relative expression of TNFR1,Caspase-8and Caspase-3 in the TNF/TNFR group was higher than that of the SOD group and the Caspase-8 suppression group( P <0. 05). The protein relative expression of TNFR1,Caspase-8 and NF-κB P50 in the TNF/TNFR group was lower than that of the NF-κB suppression group( P < 0. 05). Among the CWP patients,the relative expression of TNFR2 and NF-κB P65 in the TNF/TNFR group was lower than that of the control group( P < 0. 05),and higher than that of the SOD group( P <0. 05). CONCLUSION: AM apoptosis mediated by TNF-α/TNFR/NF-κB signal transduction pathway plays an important role in the occurrence and development of CWP. The TNF-α/TNFR/NF-κB signal transduction pathways inhibited or blocked at different stages can affect the expression of proteins related to AM apoptosis.

OBJECTIVE To establish a liquid chromatography-tandem mass spectrometry （LC-MS/MS） method for the simultaneous determination of bepotastine and hydroxychloroquine concentrations in human breast milk and apply it in clinical practice. METHODS The milk samples （50 μL） were precipitated with 200 μL methanol containing the internal standard （100 ng/mL chloroquine）， and the supernatant was taken for analysis after vortexing and centrifugation. The separation was performed on a Waters ACQUITY UPLC HSS T3 column with mobile phase consisted of 0.1% formic acid-10 mmol/L ammonium acetate solution （phase A） and methanol （phase B） at gradient elution of 0.35 mL/min. The injection volume was 2 μL， and the analysis time was 4 min. The detection of the analytes was performed by electrospray ionization in positive mode by multiple reaction monitoring with the transition of m/z 388.9→201.9 （bepotastine）， m/z 336.3→247.1 （hydroxychloroquine）， and m/z 320.2→247.2 （chloroquine）. The established LC-MS/MS method was researched in methodology and used to determine the drug concentrations in the breast milk of 1 case of lactating patient. RESULTS The linear range of bepotastine was 2-200 ng/mL（ r＝0.999）， and hydroxychloroquine was 50-1 000 ng/mL （r＝0.998）. The intra-assay and inter-assay precisions were both ≤15%， and the accuracy， extraction recovery， matrix effect， and stability all met the acceptance criteria for bioanalytical method validation. The concentration result of bepotastine and hydroxychloroquine in the breast milk of the lactating patient showed， after 2 h and 14 h， the concentrations of bepotastine in the breast milk of the patient were 34.95 ng/mL and 5.72 ng/mL； those of hydroxychloroquine were 211.92 ng/mL and 104.18 ng/mL， respectively. The relative infant doses were 1.83% and 0.56%， respectively. CONCLUSIONS The established method is simple， rapid， and sensitive. It is suitable for simultaneous determination of bepotastine and hydroxychloroquine concentrations in human milk and can provide reference for safe drug use during lactation.

OBJECTIVE To establish a liquid chromatography-tandem mass spectrometry （LC-MS/MS） method for the simultaneous determination of bepotastine and hydroxychloroquine concentrations in human breast milk and apply it in clinical practice. METHODS The milk samples （50 μL） were precipitated with 200 μL methanol containing the internal standard （100 ng/mL chloroquine）， and the supernatant was taken for analysis after vortexing and centrifugation. The separation was performed on a Waters ACQUITY UPLC HSS T3 column with mobile phase consisted of 0.1% formic acid-10 mmol/L ammonium acetate solution （phase A） and methanol （phase B） at gradient elution of 0.35 mL/min. The injection volume was 2 μL， and the analysis time was 4 min. The detection of the analytes was performed by electrospray ionization in positive mode by multiple reaction monitoring with the transition of m/z 388.9→201.9 （bepotastine）， m/z 336.3→247.1 （hydroxychloroquine）， and m/z 320.2→247.2 （chloroquine）. The established LC-MS/MS method was researched in methodology and used to determine the drug concentrations in the breast milk of 1 case of lactating patient. RESULTS The linear range of bepotastine was 2-200 ng/mL（ r＝0.999）， and hydroxychloroquine was 50-1 000 ng/mL （r＝0.998）. The intra-assay and inter-assay precisions were both ≤15%， and the accuracy， extraction recovery， matrix effect， and stability all met the acceptance criteria for bioanalytical method validation. The concentration result of bepotastine and hydroxychloroquine in the breast milk of the lactating patient showed， after 2 h and 14 h， the concentrations of bepotastine in the breast milk of the patient were 34.95 ng/mL and 5.72 ng/mL； those of hydroxychloroquine were 211.92 ng/mL and 104.18 ng/mL， respectively. The relative infant doses were 1.83% and 0.56%， respectively. CONCLUSIONS The established method is simple， rapid， and sensitive. It is suitable for simultaneous determination of bepotastine and hydroxychloroquine concentrations in human milk and can provide reference for safe drug use during lactation.

ObjectiveTo assess the level of internal exposure to PCP in a community population in Shanghai， to investigate the factors affecting the level of PCP， and to analyze the correlation between the exposure and thyroid hormone levels. MethodsA total of 464 residents of a community in Shanghai were selected as the study subjects. A questionnaire survey was conducted to obtain the demographic information， dietary situation， lifestyle and behavioral habits， and disease history of the individuals， and blood samples were collected. Gas chromatography-electron trap was applied to determine the PCP levels in serum. Multicategorical logistic regression analysis was used to analyze the possible influencing factors of PCP exposure in humans. Thyroid hormone levels were used as the dependent variable and serum PCP as the independent variable. Multiple linear regression analysis was used to assess the association between PCP and thyroid hormones in the community population after controlling the confounding factors such as age， gender， literacy， annual personal income， and chronic diseases. ResultsThe detection rate of serum PCP in 464 subjects was 90.3%， and the median serum PCP level was 0.43 μg·L^-1. The differences in PCP levels among different age groups were statistically significant. There were no significant differences in PCP levels among different gender and BMI groups. The study of PCP exposure factors showed that age， frequency of using plastic products， consumption of freshwater fish， type of occupation， annual income， and consumption of tea or coffee were the potential influencing factors for PCP exposure. Among them， age， frequency of using plastic products， consumption of tea or coffee， and consumption of freshwater fish were positively associated with PCP levels， and annual personal income was negatively associated with it. The results of multiple linear regression analysis showed that among men， PCP levels were positively correlated with TSH （b=0.105， 95%CI：0.017‒0.313） and negatively correlated with FT4 （b=-0.026， 95%CI：-0.057‒0.004）， and among women， PCP levels were positively correlated with TSH （b=0.092， 95%CI：-0.211‒0.904） and FT3 （b=0.017， 95%CI：-0.058‒0.230） and negatively correlated with FT4 （b=-0.013， 95%CI：-0.011‒0.037）. ConclusionSerum PCP detection is common among community residents in Shanghai. Different demographic characteristics or behavioral habits may increase or decrease PCP exposure. PCP exposure then affects human thyroid hormone levels.