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Objective@#To examine mental health problems among adolescents in Taiyuan City and its relationship to chronotype, so as to give a scientific basis for supporting mental health of middle school students.@*Methods@#From October to November 2021, a total of 2 621 pupils were enrolled from three junior high schools and two senior high schools in Taiyuan by using a multi stage stratified cluster random sampling method to investigate demographic characteristics, mental health status, and chronotype. Chi squared test, Spearman correlation analysis and Logistic regression were used to analyze the relationship between sleep patterns and mental health problems in middle school students.@*Results@#The proportion of morning, intermediate and evening types of middle school students sleep were 17.9%, 65.6%, and 16.4%, respectively. The overall detection rate of mental health problems was 13.8 %, which was statistically significant among middle school students in different grades, self perceived family economic status, the number of friends and sleep patterns ( χ 2=42.69, 29.15, 46.02, 93.99, P <0.05). After adjusting for grade, self perceived family economic status and the number of friends, Logistic regression analysis revealed that mental health problems were positively associated with evening type ( OR =2.84) and negatively associated with morning type ( OR =0.61)( P ＜0.05).@*Conclusion@#Chronotype is associated with mental health problems among middle school students, with a higher risk for evening type and a lower risk for morning type. Mental health of middle school students can be enhanced by changing their chronotype.
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Objective:To explore the method and curative effect evaluation of repairing and rebuilding the long segmental bone defect after resection of long bone malignant tumors in adolescents.Methods:Reviewed our experience in 10 patients. Among them, 4 were male and 6 were female. The age was 10.2 years old (range, 6-16 years old). Including 7 cases of osteosarcoma, 3 cases of Ewing's sarcoma; 2 cases of humerus tumors, 7 cases of femoral tumors, and 1 case of tibial tumors-who presented between April 2015 and October 2019, in which the proportion of bone defect account for 71.4%-89.3% of the total length of diseased bone after tumor resection, with an average value of 80.9%. Considering the epiphyseal growth of young people, on the premise of ensuring enlarged tumor resection, we use traditional fibula autograft and prosthesis combined with steel plate, 3D printing design to retain the super-prosthesis of the epiphysis, and 3D printing bone trabecular was processed for the sake of making it grow successfully into the binding part of prosthesis and bone as we expect, simultaneously, the design of the short-force arm retaining the bilateral epiphysis can assit the steel plate and interlocking screws to enhance the stability.Results:The operation was completed successfully, and there were no complications such as nerve and blood vessel injury during the operation. After follow-up of 4-8 months, with an average follow-up of 22.9 months. One patient's review of X-ray film after 2 years of the operation showed that the transplanted fibula had a sign of bone resorption, and the internal fixation was in it's original position without obvious abnormalities. Two cases' auxiliary steel plates had fractured within one and a half to two years after surgery. With replacing the fractured steel plates, the internal fixation was good until now. According to the evaluation standards of the International Society of Limb Salvation: 2 cases of humerus osteosarcoma were respectively scored 23 points, 26 points, an average of 24.5 points; 4 cases of femoral osteosarcoma and 3 cases of femoral Ewing's sarcoma respectively scored 26 points and 25 points, 19 points, 30 points, 27 points, 24 points, 28 points (average, 25.6 points); 1 case of tibial osteosarcoma scored 26 points; all obtained relative satisfying treatment results.Conclusion:The combination of 3D printing and traditional machining techniques to produce an individualized long segmental prosthesis that preserves the epiphysis which applicated in the limb salvage treatment of bone malignant tumors can achieve excellent therapeutic effect.
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Objective: To analyze the application and significance of three-dimensional (3D) printing in the surgical simulation and plan-ning for pelvic malignant tumors before the actual surgery, surgical resection, and postoperative resection effect analysis. Methods: A retrospective analysis was performed for 20 cases of primary pelvic malignant tumors in 11 male and 9 female patients with a mean age of 39.1 years (range, 14-60 years) who were admitted to Xinjiang University of Medical Science and Technology between January 2014 and January 2018. The tumors included osteosarcoma in 7 patients, chondrosarcoma in 12, and Ewing's sarcoma in one. Accord-ing to the Enneking pelvic classification, 10 cases involved the pelvicⅡarea; 6, the pelvicⅢarea; 6, the pelvicⅠandⅡareas; and 8, the pelvic I andⅣareas. According to whether or not a 3D-printed osteotomy guide plate was used, the cases were divided into a 3D-printed guide plate group and a conventional group, with 10 cases in each group. Operation time, blood loss volume, function score, and linear distance deviation were compared between the two groups. Results: The operation was completed successfully with com-plete excision in 20 patients. The operation time in the 3D-printed guide plate group (4.4～1.4 h) was not statistically significantly dif-ferent from that in the control group (4.5～1.4 h; P=0.83). No significant difference in intraoperative blood loss volume was found be-tween the 3D-printed guide plate (1,980～1,158 mL) and control (2,785～1,784 mL; P=0.16) groups. The postoperative Musculoskele-tal Tumor Society score (20.4～0.98) in the 3D-printed guide plate group showed no significant difference from that in the convention-al group (20.2～1.29; P=0.78). The mean linear difference between the 3D-printed guide plate group (3.8～1.9 cm) and the conven-tional group (8.7～1.0) was statistically significant (P=0.001). Conclusions: The 3D-printed group was not significantly different from the conventional group in terms of operation time, blood loss volume, and function score but had better surgical resection accuracy than the conventional group.
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Objective To investigate the relationship between Plasmodium infection and platelet factor Ⅳ(PF4) and to provide the ideas for the treatment of malaria.Methods The serum PF4 concentration was determined with the Enzyme-linked immunosorbent assay (ELISA) in the malaria group (122 cases of malaria patients)and the control group (399 cases of normal).The average value (mean) and positive rate of PF4 were compared between two groups.Results The PF4 level of malaria group was significantly higher than that in the control group and the difference between two groups was statistical significance (P ＜ 0.05).There was no significant difference in Plasmodium falciparum density between the PF4 high level group and the PF4 normal group in the malaria group.Conclusions The expression of human PF4 level has definite relationship with the plasmodium infection of Equatorial Guinea.
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Objective:To analyze the reasons for unplanned resection of soft tissue sarcomas and explore the treatment strategies for cancer surgery. Methods: The study included 105 patients with soft tissue sarcomas admitted to the First Affiliated Hospital of Xinjiang Medical University between October 2009 and December 2012. The average age of the patients was 52 years old. Among the patients, 65 were males and 40 were females. Up to 82 patients underwent planned resection (Group A) in our hospital, and 23 underwent unplanned resection (Group B) in other hospitals. Wide excision and radical resection were conducted in Group A, whereas extended resection was performed in Group B. General data, tumor location and size, resection margin, local recurrence and metastasis, and survival were statistically analyzed in the two groups. Results:The proportion attaining the margin of wide excision was obviously lower in Group A than in Group B (P＜0.05). The 3-year survival rate was significantly higher in Group B than in Group A (P=0.001). Within an average follow-up of 18 months (3 months to 36 months) in Group B, 12 patients died, including 9 with tumor metastasis and 3 with other diseases. Within an average follow-up of 23 months (5 months to 36 months) in Group A, 15 patients died, including 12 with tumor metastasis and 3 with other diseases. Conclusion:Compared with planned surgical operation, unplanned resection of soft tissue sarcomas often leads to inadequate resection margin, which results in a high incidence of local recurrence and an increased mortality. Thus, clinicians should attempt to avoid unplanned resection of sarcomas.
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Objective To evaluate the effect of unipolar versus bipolar hemiarthroplasty for treatment of femoral neck fracture in the elderly Methods Related randomized controlled trials (RCTs) and quasi-randomized controlled trials (qRCTs) were searched from computerized databases MEDLINE,EMBASE,Cochrane Library,and CBM disc.Additional studies were identified through hand searches of 10 domestic journals.Time period of the search was from 1966 to June 2012.RevMan 4.2.8 software was used for data analysis.Results A total of 7 RCTs and 3 qRCTs were included.In this meta analysis,bipolar hemiarthroplasty was associated with better hip function compared with unipolar hemiarthroplasty at postoperative 6 months (RR =0.74,95％ CI0.62-0.88,P ＜ 0.01).However,the two procedures revealed no significant differences in terms of postoperative one-year dislocation rate (RR =1.01,95％ CI0.54-1.89,P ＞ 0.05),reoperation rate (RR =1.13,95％ CI 0.74-1.72,P ＞ 0.05),major complication incidence (except for dislocation) (RR =1.27,95％ CI 0.74-2.18,P ＞ 0.05),and postoperative 2-year mortality (RR1.16,95％ CI 0.73-1.87,P ＞ 0.05).Conclusion Bipolar hemiarthroplasty is preferable to unipolar hemiarthroplasty for hip function improvement,but postoperative one-year dislocation rate,reoperation rate,major complication incidence (except for dislocation),and postoperative twoyear mortality are similar for the two procedures.
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BACKGROUND:Isobaric tags for relative and absolute quantitation (iTRAQ) mass spectrometry technology studys the information of relevant protein according to the ion signal shows different mass-to-charge ratio in the tandem mass spectrometry analysis. OBJECTIVE:To establish the protein spectrum of differential proteins in cerebrospinal fluid of acute spinal cord injury rat model, study the secondary injury mechanism and find an effective method of treating acute spinal cord injury from molecular level. METHODS:Acute spinal cord injury was produced in Sprague-Dawley rats and iTRAQ technology was applied to analyze the differential proteins in cerebrospinal fluid of acute spinal cord injury rat model. RESULTS AND CONCLUSION:Total 722 proteins have been identified in this study, including 107 differentialy expressed proteins, 63 downregulated proteins and 44 upregulated proteins. There were 19 proteins related to neurogenesis, including 14 up-regulation proteins and 5 down-regulation proteins. Seven proteins contributed to the regulation of neurogenesis. The differential proteins and growth factor identified in this study can be taken as the biomarkers of acute spinal cord injury or indicators of clinical monitoring of the progression, target treatment and efficacy assessment after acute spinal cord injury.
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BACKGROUND:Clinical studies have shown that early use of methylprednisolone can promote neurological functional recovery, reasonable initial dose, interval time and treatment duration are the key to the methylprednisolone treatment of acute spinal cord injury. OBJECTIVE:To observe the differential protein expression profile in spinal cord tissue after intrathecal injection of high-dose methylprednisolone was given in rat model of acute spinal cord injury. METHODS:Eight Sprague-Dawley rats were included in this study to establish acute spinal cord injury model and the models were randomly divided into two groups, receiving intrathecal injection of methylprednisolone 7.5 mg/kg at 0 and 8 hours after modeling. The injured spinal cord tissue was harvested after 24 hours of injection. The differentialy expressed proteins and nerve regeneration-related differential proteins in two groups were analyzed using isotope labeling and quantitative technical analysis. RESULTS AND CONCLUSION: Totaly 87 differentialy expressed proteins were identified in this study. Compared with 0 hour group, there were 43 up-regulated differential proteins and 44 down-regulated differential proteins in the 8-hour group. Eighteen differential proteins were related to neural regeneration, including 8 up-regulation proteins and 10 down-regulation proteins. OMgp as a potential neural axon growth inhibitory factor specificaly bound with NgR/P75/TROY/Lingo-1 to form receptor complexes and activated RhoA through the second messenger cAMP, thus inhibiting the colapse of axon growth cone. Folowing intrathecal injection of methylprednisolone for treatment of acute spinal cord injury in rats, differential proteins and nerve regeneration-related factors in spinal cord are identified and analyzed for protein database retrieval and protein function analysis, their expression may serve as the indicator of monitoring nerve regeneration after acute spinal cord injury.
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After a description of the basic steps, organization forms, sharing contents, and interactive ways of reading sharing party in Southern Medical University , the experiences in its organization were summarized with sug-gestions put forward such as construction of its unique displaying platform, navigation of its subject contents, and precipitation of its excellent contents .
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Objective:To analyze the clinical effect of different surgical methods on giant-cell tumor of bone (GCTB). Methods:Between January 2007 and June 2012, 37 patients receiving treatment for GCTB were enrolled in this study. These patients included 20 males and 17 females whose ages ranged from 20 to 56 (average=31.6). The prosthesis replacement and nonprosthetic replacement op-eration on the postoperative recurrence, limb function, comprehensive evaluation of the curative effect, as well as morbidity and recur-rence rate among different nations and in the upper and lower limbs of GCTB patients were analyzed. Results:The predilection age of the cases ranged from 20 to 50 years old. The incidence was higher in the Uighur population of Xinjiang, China. However, the recur-rence rate in ethnic difference was not statistically significant (P>0.05). Conclusion:The predilection age of GCTB cases was 20~50 years old, with higher morbidity in Uighur than in Han and other ethnic groups. The morbidity and recurrence rate were higher in the lower limbs than in the upper limbs of patients. The scraping bone graft and bone cement filling, the internal fixation of the scraping bone graft, and the artificial joint replacement of tumor resection were all reliable modes of treatment.
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BACKGROUND:In mass spectrometry analysis, the same protein in different samples labeled with isobaric tags for relative and absolute quantitation presents the same mass-to-charge ratio, while in the tandem mass spectrometry analysis, the ion signal shows different mass-to-charge ratio (114-121). Thus the quantitative information of the related proteins can be obtained. OBJECTIVE:To establish the protein spectrum of spinal cord tissue differences proteins after acute spinal cord injury, and to explore the spinal differential protein expression on the molecular level using isobaric tags for relative and absolute quantitation combined with LC-MS/MS mass spectrometry technique. METHODS:Eight Sprague Dawley rats were selected to establish the acute spinal cord injury models using Al en’s method. The rats were randomly divided into 0 hour spinal cord injury group and 8 hours spinal cord injury group, four rats in each group. The spinal cord tissues were col ected after injury, and the spinal cord tissue differences proteins were analyzed with isobaric tags for relative and absolute quantitation technique after acute spinal cord injury. RESULTS AND CONCLUSION:Total y 220 differential y expressed proteins were identified in this research, the number of up-regulation proteins was 116 and the number of down-regulation proteins was 104. There were 12 differential proteins related to neural regeneration, and among the 12 proteins, there were seven up-regulation proteins and five down-regulation proteins. The various identified differential proteins and significantly expressed nerve growth factors in this experiment can be used as the biomarkers of acute spinal cord injury or used as the strong evidence for the clinical management and monitoring of the injury process and target therapy of acute spinal cord injury, as wel as the effect evaluation.
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Objective To study the expression of KISS-1 in normal endometrium and in ectopic endometri-um patients with endometriosis. Methods The expression of KISS-1 in 55 cases of normal endometrium as well in 46 cases of ectopie endometriurn with endometriosis were detected by immunohistochemicai EliVision plus method. Results The positive expression rates of KISS-1 in ectopic endometriotic tissues and in normal endometri-urn were 30.43 % and 63.64 % respectively ,and the positive expression rates in ectopic endometriotic tissues signifi-cantly lower than those in the normal endometrium( P< 0.01, P < 0.05). Conclusion The decreased expression of KISS-1 may be related to the mechanism of endometriosis.
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Objective To evaluate the effects of cold provocation on optic dise blood flow and retinal light sensitivity of primary open-angle glaucoma (POAG) patients,and explore the relationship between the changes of optic disc blood flow and retinal light sensitivity. Methods A total 33 POAG patients (33 eyes) and 13 normal controls (13 eyes) were tested by using the Heidelberg retinal flowmetry (HRF) and Topcon automatic perimeter,and the optic disc blood flow and retinal light sensitivity of POAG patients and normal controls were measured at normal conditions and after cold provocation. Results The mean optic disc blood flow,volume and the mean retinal light sensitivity of POAG patients decreased significantly (P＜0.05) after cold provocation.There was a linear and significant relationship between the decrease of mean optic disc blood flow and mean retinal light sensitivity of POAG patients (r=0.615,P＜0.001).The optic disc blood flow of POAG patients with a history of migraine were more likely to reduce in response to cold provocation and reduced much more than those without such history (P＜0.05). Conclusion Cold provocation can significantly reduce both the optic disc blood flow and retinal light sensitivity in POAG patients.A close correlation was found between the amount of mean optic disc blood flow decrease and the volume of mean retinal light sensitivity decline.
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Object To study the chemical constituents of Schizonepeta tenuifolia (Benth.) Briq.. Methods The monoterpenoid constituents of S. tenuifolia were separated on silica gel column and their structures were elucidated by spectral. Results Two new compounds and three known compounds were obtained. Conclusion The new compounds were identified as 3-hydroxy-4(8)-ene-p-menthane-3(9)-lactone and 1, 2-dihydroxy-8(9)-ene-p-menthane.