ObjectiveTo investigate the immunomodulatory effect of polysaccharides from Astragali Radix-Angelicae Sinensis Radix herb pair（Qi-gui polysaccharides） on lipopolysaccharide（LPS）-induced RAW264.7 macrophages and to characterize the structure of the active component Qi-gui homogeneous polysaccharide（AAPS-4a）， and evaluate its protective effect on ulcerative colitis（UC）. MethodsThe effects of six Qi-gui polysaccharides（0.01-100 mg·L^-1） on the proliferation of RAW264.7 cells were assessed by cell proliferation and activity assay（CCK-8）， and enzyme-linked immunosorbent assay（ELISA） was used to investigate the effects of the six polysaccharides（3， 10 mg·L^-1） on the secretion levels of tumor necrosis factor（TNF）-α， interferon（IFN）-β， and nitric oxide（NO） in LPS-induced RAW264.7 cells. After screening for active polysaccharides， high-performance size-exclusion chromatography（HPSEC） was used to determine its homogeneity and relative molecular weight， then its characteristic functional groups were identified by Fourier transform infrared spectroscopy（FT-IR）， monosaccharide composition was analyzed by high performance liquid chromatography（HPLC）， methylation analysis combined with gas chromatography-mass spectrometry（GC-MS） was performed to determine the types and linkage modes of sugar residues， and one- and two-dimensional nuclear magnetic resonance（NMR） were used to identify the sugar residue composition and configuration of the active polysaccharide. Finally， experimental animals were divided into the normal group， model group， AAPS-4a low-dose group（50 mg·kg^-1）， AAPS-4a high-dose group（100 mg·kg^-1）， and sulfasalazine（SASP） group （75 mg·kg^-1）. Except for the normal group， the acute UC mouse model was induced using 3.5% dextran sulfate sodium salt（DSS）. Each treatment group was administered the corresponding dose via oral gavage for 7 days， and changes in body weight were recorded. After treatment， the spleen index and disease activity index（DAI） score were calculated， TNF-α and interleukin-6（IL-6） levels in the serum were detected by ELISA， and histopathological changes in colon tissue were observed by hematoxylin-eosin（HE） staining. ResultsAt the cellular level， AAPS-4a exhibited a dose-dependent inhibition of LPS-induced increases in TNF-α， IFN-β， and NO levels（P<0.01）. Structural characterization of AAPS-4a revealed that it was a homogeneous polysaccharide with a relative molecular weight of 7.6×10³ Da， consisting of mannose（Man）， glucose（Glc）， and galactose（Gal） in a molar ratio of 1.3∶23.9∶1.0. It was primarily composed of five sugar residues of 1，6-α-D-Glcp， T-α-D-Glcp， 1，3-β-D-Galp， 1，4-α-D-Manp， and 1，2-α-D-Galp. In vivo experiments showed that compared with the normal group， the model group demonstrated markedly increased DAI score and spleen index， significantly reduced colon length， and significantly elevated levels of TNF-α and IL-6（P<0.01）. Compared with the model group， the AAPS-4a high-dose group significantly reduced the DAI score and spleen index， as well as TNF-α and IL-6 levels， and improved colonic atrophy（P<0.05， P<0.01）. Pathological observations showed that AAPS-4a significantly inhibited inflammatory cell infiltration in colon tissue and alleviated pathological damage. ConclusionAAPS-4a， a neutral homogeneous polysaccharide composed of 1，6-α-D-Glcp， T-α-D-Glcp， 1，3-β-D-Galp， 1，4-α-D-Manp and 1，2-α-D-Galp， is identified as a key bioactive component contributing to the anti-UC effect of the Qi-gui herb pair. Its immunoregulatory and anti-UC properties suggest its potential as a therapeutic agent for UC.

Objective To compare the clinical efficacy and short-term prognosis of laparoscopic radical resection of right colon cancer guided by superior mesenteric artery and superior mesenteric vein.Methods 80 patients with right colon cancer of cT2-4 and/or N0-2M0 admitted from January 2020 to October 2022 were selected as the research objects,and they were randomly divided into observation group and control group,with 40 patients in each group.The observation group was treated with SMA-oriented laparoscopic radical resection of right colon cancer,while the control group was treated with SMV-oriented laparoscopic radical resection of right colon cancer.The curative effect and prognosis of the two groups were compared.Results There was no significant difference between the two groups in general condition,operation time,gastric tube placement time,recovery time of farting,postoperative fasting time,postoperative drainage time,postoperative nutritional index,total incidence of complications and postoperative hospitalization time(P>0.05).The lymph nodes in the observation group were significantly more than those in the control group,and the difference was statistically significant(P<0.05).In the observation group,the lymph nodes in the anterior and left side of superior mesenteric artery were examined(No.D3),and 273 lymph nodes were detected,and Seven patients(17.5% )were diagnosed with D3 metastasis,and 13 lymph nodes were positive(5.2% ).Conclusion Laparoscopic radical resection of right colon cancer guided by superior mesenteric artery,without increasing the incidence of complications and high safety,can more thoroughly clean lymph nodes and reduce tumor recurrence,which is expected to significantly improve the prognosis of patients.

Objective:To explore the risk factors for stone recurrence after laparoscopic common bile duct exploration (LCBDE) combined with laparoscopic cholecystectomy (LC) and to develop a risk prediction model.Methods:Clinical data of 344 patients with bile duct stones who underwent LCBDE combined with LC at Hebei General Hospital from January 2016 to March 2022 were retrospectively analyzed, including 165 males and 179 females, aged (62.72±13.56) years old. Patients were divided into two groups based on whether stones recurred during the follow-up period: recurrence group ( n=37) and non-recurrence group ( n=307). Clinical data such as common bile duct diameter, stone size, number of stones and duration of T-tube drainage were collected from the patients. Logistic regression was used to analyze the risk factors for postoperative stone recurrence, and then developed a logistic regression model. The predictive efficacy of the model was assessed by the area under the receiver operating characteristic (ROC) curve, and the Hosmer-Lemeshow test. Results:The results of multifactorial logistic regression analysis showed that patients with ≥2 choledochal stones had a high risk of stone recurrence after LCBDE combined with LC ( OR=3.094, 95% CI: 1.069-8.954, P=0.037). In contrast, regular postoperative oral choleretic medication was a protective factor for stone recurrence after LCBDE combined with LC ( OR=0.160, 95% CI: 0.072-0.354, P=0.001). A logistic regression model, based on the number of common bile duct stones and regular postoperative oral choleretic medication, was developed to predict the recurrence of bile duct stones in patients who underwent LCBDE combined with LC. The area under the ROC curve for this model was found to be 0.821 (95% CI: 0.758-0.885). The Hosmer-Lemeshow test, χ 2=7.26, P=0.509, suggested that there is good agreement between the model's predicted probabilities and ideal probabilities. Conclusions:The number of stones (≥2) is an independent risk factor for stone recurrence after LCBDE combined with LC in patients with bile duct stones. Regular postoperative oral choleretic medication is a protective factor for stone recurrence after LCBDE combined with LC. Predictive models based on the number of choledochal stones and regular postoperative oral choleretic medication have better efficacy in predicting postoperative stone recurrence.

Objective:To evaluate the effect of teacher simulate standardized patient (TSSP) consultation training in pediatric practical teaching.Methods:A total of 120 interns from the five-year clinical medicine major of Batch 2015 were randomly divided into experimental group and control group. In the experimental group, 60 interns were trained by TSSP for consultation after admission. After the training, the clinical parents of the children were consulted and the children were physically examined under the guidance of teachers. In the control group, 60 interns were trained according to the same requirements, but TSSP consultation training was not included. At the end of the practice, the performance, operation skills and medical record writing ability of the interns were compared, and the satisfaction of the experimental group was investigated. SPSS 25.0 software was used for t test and chi-square test. Results:The medical record writing results of the experimental group were (96.15±3.00) points, significantly higher than that of the control group [(81.02±3.29) points], and the differences were statistically significant ( t = 26.38; P < 0.001). In the mini-clinical evaluation exercise (Mini-CEX), the scores of medical history collection, communication skills, humanistic care and physical examination were significantly higher than those of the control group ( t= 15.41, 17.67, 15.39 respectively; all P < 0.001). The experimental group had high satisfaction with the teaching method of TSSP consultation training. Conclusion:TSSP consultation training improves the intern medical record writing ability, doctor-patient communication ability, clinical operation ability, stimulates the learning interest of interns, trains the trainee doctors humanistic consciousness, integrates into the ideological and political education, effectively ensures the quality of practical teaching of pediatrics, and obtains recognition from intern, which is worth promoting.

Hip fracture is considered as the most severe osteoporotic fracture characterized by high disability and mortality in the elderly. Improved surgical techniques and multidisciplinary team play an active role in alleviating prognosis, which places higher demands on perioperative nursing. Dysfunction, complications, and secondary impact of anaesthesia and surgery add more difficulties to clinical nursing. Besides, there still lack clinical practices in perioperative nursing for elderly patients with hip fracture in China. In this context, led by the Orthopedic Nursing Committee of Chinese Nursing Association, the Expert consensus on clinical practice in perioperative nursing for elderly patients with hip fracture ( version 2023) is developed based on the evidence-based medicine. This consensus provides 11 recommendations on elderly patients with hip fracture from aspects of perioperative health education, condition monitoring and inspection, complication risk assessment and prevention, and rehabilitation, in order to provide guiding advices for clinical practice, improve the quality of nursing and ameliorate the prognosis of elderly patients with hip fracture.

Objective:To investigate the diagnostic accuracy of serological indicators and evaluate the diagnostic value of a new established combined serological model on identifying the minimal hepatic encephalopathy (MHE) in patients with compensated cirrhosis.Methods:This prospective multicenter study enrolled 263 compensated cirrhotic patients from 23 hospitals in 15 provinces, autonomous regions and municipalities of China between October 2021 and August 2022. Clinical data and laboratory test results were collected, and the model for end-stage liver disease (MELD) score was calculated. Ammonia level was corrected to the upper limit of normal (AMM-ULN) by the baseline blood ammonia measurements/upper limit of the normal reference value. MHE was diagnosed by combined abnormal number connection test-A and abnormal digit symbol test as suggested by Guidelines on the management of hepatic encephalopathy in cirrhosis. The patients were randomly divided (7∶3) into training set ( n=185) and validation set ( n=78) based on caret package of R language. Logistic regression was used to establish a combined model of MHE diagnosis. The diagnostic performance was evaluated by the area under the curve (AUC) of receiver operating characteristic curve, Hosmer-Lemeshow test and calibration curve. The internal verification was carried out by the Bootstrap method ( n=200). AUC comparisons were achieved using the Delong test. Results:In the training set, prevalence of MHE was 37.8% (70/185). There were statistically significant differences in AMM-ULN, albumin, platelet, alkaline phosphatase, international normalized ratio, MELD score and education between non-MHE group and MHE group (all P<0.05). Multivariate Logistic regression analysis showed that AMM-ULN [odds ratio ( OR)=1.78, 95% confidence interval ( CI) 1.05-3.14, P=0.038] and MELD score ( OR=1.11, 95% CI 1.04-1.20, P=0.002) were independent risk factors for MHE, and the AUC for predicting MHE were 0.663, 0.625, respectively. Compared with the use of blood AMM-ULN and MELD score alone, the AUC of the combined model of AMM-ULN, MELD score and education exhibited better predictive performance in determining the presence of MHE was 0.755, the specificity and sensitivity was 85.2% and 55.7%, respectively. Hosmer-Lemeshow test and calibration curve showed that the model had good calibration ( P=0.733). The AUC for internal validation of the combined model for diagnosing MHE was 0.752. In the validation set, the AUC of the combined model for diagnosing MHE was 0.794, and Hosmer-Lemeshow test showed good calibration ( P=0.841). Conclusion:Use of the combined model including AMM-ULN, MELD score and education could improve the predictive efficiency of MHE among patients with compensated cirrhosis.

[摘 要] 目的：探讨吴茱萸碱（Evo）是否通过调控lncRNA LINC00858表达调控神经母细胞瘤SK-N-SH细胞的增殖、迁移及侵袭。方法：在体外以3、6、12 μmol/L Evo处理人神经母细胞瘤SK-N-SH细胞，利用RNA干扰技术分别将si-NC、si-LINC00858转染至SK-N-SH细胞，将pcDNA、pcDNA-LINC00858转染至SK-N-SH细胞并经12 μmol/L Evo处理，实验分为对照组、Evo低剂量组、Evo中剂量组、Evo高剂量组、si-NC组、si-LINC00858组、Evo+pcDNA组、Evo+pcDNA-LINC00858组。采用qPCR法检测各组细胞LINC00858的表达量，MTT、Transwell实验分别检测细胞的增殖、迁移、侵袭能力，WB法检测细胞中cyclinD1、MMP-2、MMP-9和p21蛋白的表达。结果：与对照组相比，Evo低、中、高剂量组SK-N-SH细胞中LINC00858表达均显著降低（均P<0.05），细胞增殖抑制率显著升高、迁移及侵袭细胞数显著减少（均P<0.01），cyclinD1、MMP-2、MMP-9蛋白表达降低、p21蛋白表达升高（均P<0.01）。与si-NC组相比，si-LINC00858组细胞的增殖抑制率、迁移和侵袭细胞数及相关蛋白表达变化同Evo低、中、高剂量组。与Evo+pcDNA组相比，Evo+pcDNA-LINC00858组细胞的增殖抑制率显著降低、迁移及侵袭细胞数均显著增多（均P<0.01），cyclinD1、MMP-2、MMP-9蛋白表达升高、p21蛋白表达降低（均P<0.05）。结论：Evo通过下调LINC00858表达抑制神经母细胞瘤SK-N-SH细胞的增殖、迁移及侵袭。

OBJECTIVE To study the pharmacokinetics and pharmacodynamics of oral colon targeted pH-sensitive hydrogel of hydrocortisone sodium succinate(HSS-GEL). METHODS The plasma concentration changes of HSS-GEL and HSS in the mice were investigated; 2, 4, 6-trinitrobenzene sulfonic acid(TNBS)-induced mouse model of ulcerative colitis(UC) was established, disease activity index(DAI), colon length, myeloperoxidase(MPO) and organ index were used as indicators to investigate the therapeutic effect of HSS-GEL on colitis. RESULTS The results showed that the Tmax, Cmax and AUC of HSS-GEL were significantly different from those of HSS(P<0.01). The Tmax of HSS-GEL was significantly longer than that of HSS, and the time of drug absorption into the blood was significantly delayed. The Cmax of HSS-GEL group was significantly lower than that of HSS. The AUC of the HSS-GEL group was 39.38% of the same dose of HSS, indicating that the amount of the drug absorbed into blood was significantly reduced after the HSS was made into HSS-GEL orally. After modeling, DAI, MPO activity and organ index were increased, while the colon was shortened due to the inflammatory reaction, with the treatment of HSS-GEL, DAI, MPO activity and some organ index of mice were significantly decreased comparing with TNBS group(P<0.05 or P<0.01). The degree of reduction of MPO activity and some organ indexes of the mice in the TNBS+HSS-GEL group were significantly greater than those in the TNBS+HSS group, indicating that HSS-GEL had good therapeutic effect on TNBS-induced ulcerative colitis, and the effect was better than that of HSS. CONCLUSION The HSS-GEL prepared has good colon targeting characteristic and colitis treatment effect.

OBJECTIVE: To explore the genetic basis for a child with myopathy and cerebellar atrophy with ataxia. METHODS: Clinical examinations and laboratory testing were carried out for the patient. The proband and the parents' genomic DNA was extracted from peripheral blood samples and subjected to trio whole-exome sequencing. Candidate variant was validated by Sanger sequencing. RESULTS: The 1-year-and-8-month-old boy manifested motor developmental delay, ataxia, hypomyotonia, increased serum creatine kinase. Cranial MRI showed cerebellar atrophy with progressive aggravation. Genetic testing revealed that the patient has harbored compound heterozygous variants of the MSTO1 gene, namely c.13delG (p.Ala5ProfsTer68) and c.971C>T (p.Thr324Ile), which were respectively inherited from his mother and father. The former was unreported previously and was predicted to be likely pathogenic, whilst the latter has been reported previously and was predicted to be of uncertain significance. CONCLUSION The compound heterozygous c.13delG (p.Ala5ProfsTer68) and c.971C>T (p.Thr324Ile) variants probably underlay the disease in the proband. Above finding has enriched the spectrum of MSTO1 gene variants underlying mitochondrial myopathy and cerebellar atrophy with ataxia.
Ataxia/genetics* ; Atrophy/genetics* ; Cell Cycle Proteins/genetics* ; Child ; Cytoskeletal Proteins/genetics* ; Humans ; Infant ; Male ; Mitochondrial Myopathies ; Mutation ; Neurodegenerative Diseases ; Whole Exome Sequencing

Objective: To investigate the current status of myopia in children and adolescents in Qamdo, Tibet, and analyze related influencing factors, so as to provide a basis for the prevention and control of adolescents in plateau areas. Methods: A cross sectional study was conducted among 959 children and adolescents randomly selected from one district and two counties in Qamdo (from the fourth grade of elementary school to the second grade of high school) for visual acuity and refraction tests and filled out a vision related behavior questionnaire to analyze the incidence of myopia among adolescents in the region and its associated factors. Results: The myopia rate of adolescents in grades 4-11 was 54.43%, the rate of undercorrection of refractive errors was 85.25%, and the percentage of students wearing eyeglasses was 34.67%,fully vision correction rate was 42.54%. The myopia rate of students in grades 4-6 was 35.14%, 64.71% in grades 7-9, and 73.48% in grades 10-11. The myopia rate increased with grades( χ 2= 101.18 , P <0.01). The myopia rate (70.40%) of urban students (grades 4-9) was higher than that of county level(41.45%), and the myopia rate of students with myopia from either parent (68.24%) was higher than that of students without myopia (51.91%) , the myopia rate of girls (59.96%) was higher than that of boys (48.36%)( χ 2=53.19，13.46，12.98， P <0.01). Use electronic products for more than 2.5 hours per day, electronic devices usage after bedtime, the light low indoor brightness when studying on a sunny day, and only use one of the table lamps or roof lights when studying at night, preference for fried food, poor sleep quality, in the morning the students who still feel tired are at higher risk of myopia( χ 2=10.35, 10.91, 6.87, 4.25, 4.97, 5.71, 12.11, P < 0.05). Multivariate regression analysis showed that the occurrence of myopia was related to region, grade, gender, parental myopia, time spent on electronic products every day in the past 5 months, and sleep quality( P <0.05). Conclusion The high rate of myopia in children and adolescents in Qamdo may be related to the quality of sleep, the length of time electronic products are used, the eye environment, and the frequency of eating fried foods. Outdoor activities do not show significant differences.