Objective To investigate the application value of the MHSeqTyper47 kit in kinship identification.Methods Multiplexed amplification and library preparation were performed for DNA samples from 113 related individuals by using the MHSeqTyper47 kit.The libraries were sequenced on a MiSeq FGx sequencer,and the data were analyzed using MHTyper for microhaplotype genotyping.The kinship indexes were calculated to evaluate the application efficiency of this kit in kinship identification and compared with those of the GlobalFilerTM kit.Results For the MHSeqTyper47 kit,the CPI values in trio identification were 1.43× 1011～6.15×1018.The CPI values in duo identification were 1.02× 105～1.53× 1013.The CFSI values in full sibling identification were 7.73×101～2.59×1016.Trios,duos and full siblings could be completely distinguished from unrelated pairs.The combined efficiency of these two kits in 2nd-degree kinship identification was 0.466 2.Conclusion The application value of MHSeqTyper47 kit is relatively higher in the identification of lst-degree kinships.If jointly used with the GlobalFilerrM kit,2nd-degree kinship identification could be achieved in some cases.

Objective:To design an improved lamina hook system and compare its biomechanical properties with traditional lamina hook system in fixation of lumbar spondylolysis.Methods:The thin layer CT data of the lumbosacral vertebrae of 20 healthy young male servicemen who underwent physical examination in the outpatient department of the 940th Hospital of Joint Logistics Support Force of PLA from January 2021 to August 2022 were collected. The age of the subjects was 20-30 years [(25.0±3.0)years]. A 3-dimensional model of the L 5 vertebral body was constructed using the 3-dimensional modeling software. The new improved lamina hook was designed according to the measurements including the thickness of the middle area, the longest longitudinal diameter, the curvature radius of the lower edge, the angle between the upper and lower tail ends, the thickness of the lower edge, and the longest diameter of the lower edge of the bilateral L 5 vertebral plates. One serviceman was selected from the aforementioned group to construct a linear finite element model of segments L 4-S using the 3-dimensional virtual software (normal model, model A), based on which, the L 5 bilateral spondylolysis model (model B), improved lamina hook model (model C) and traditional lamina hook models (model D) were designed. By constraining both sides of the sacrum and applying a longitudinal load of 400 N on the L 4 vertebral body, the upper 1/3 gravity of the body was simulated, and with a bending moment of 10 N·m along the X, Y, and Z directions, motions of forward flexion, backward extension, lateral bending, rotation, etc were simulated. The range of motion of segment L 4/5 and L 5/S 1 of model A was evaluated and compared with the findings of the previous researches to verify its effectiveness. The overall range of motion of models A, B, C, and D, the range of motion of segment L 4/5 and L 5/S 1, the maximum overall displacement, the maximum displacement and stress of the isthmus, the stress distribution and maximum stress of internal fixation of models C and D, and the stress distribution and maximum stress of the vertebral body of models C and D were compared. Results:(1) During forward flexion, backward extension, lateral bending and rotation, the range of motion of model A was 5.01°, 4.03°, 3.91° and 1.42° in segment L 4/5, and was 4.62°, 2.51°, 2.40° and 1.23° in segment L 5/S 1. (2) The overall range of motion, range of motion of segment L 4/5 and L 5/S 1 and maximum overall displacement of models A, C, and D were similar in axial compression, forward flexion, backward extension, left bending, and left rotation, while those of model B were significantly increased. (3) There was no significant difference in the maximum displacement of the isthmus of models A, C, and D under different motion modes, while the maximum displacement of model B in the isthmus was significantly larger than that of models A, C, and D, especially during rotation, increased by 295%, 277%, and 276% respectively. The maximum stress of the isthmus of model C was 0.938 MPa, 1.698 MPa, 0.410 MPa, 2.775 MPa, and 1.554 MPa respectively. The maximum stress in the isthmus of model D was 0.590 MPa, 1.297 MPa, 0.520 MPa, 3.088 MPa, and 2.072 MPa respectively. The maximum stress of the isthmus of models C and D was similar during axial compression and forward flexion, while the stress of the isthmus of model C was smaller than that of model D during backward extension, lateral bending, and rotation, decreased by 21.1%, 10.2%, and 25.0% respectively compared with model D. (4) The maximum stress of internal fixation in models C and D during forward flexion, backward extension, left bending, and left rotation was 135.220 MPa, 130.180 MPa, 200.940 MPa and 306.340 MPa respectively, and was 131.840 MPa, 112.280 MPa, 349.980 MPa and 370.140 MPa respectively. The maximum stress of internal fixation in the two models of internal fixation during forward flexion and backward extension was similar, while it was decreased by 42.6% and 17.2% in model C during left bending and left rotation, compared with model D. (5) The maximum stress of the vertebral body during forward flexion, backward extension, left bending, and left rotation was 79.787 MPa, 36.857 MPa, 37.943 MPa and 96.965 MPa respectively in model C, but was 80.104 MPa, 64.236 MPa, 196.010 MPa and 193.020 MPa respectively in model D. The maximum stress of models C and D was all distributed in the contact area with the internal fixation, and especially during backward extension, left bending, and left rotation, when it was reduced by 42.6%, 80.6%, and 49.8% of model C respectively, compared with that of model D. Conclusions:The improved laminar hook is more consistent with the Chinese anatomized structure of the lamina. Compared with the traditional lamina hook system, the improved lamina hook system can effectively reduce the displacement in all directions and range of motion of lumbar spondylolysis, therefor can significantly reduce the stress of internal fixation and vertebral body and has better biomechanical performance.

Objective Sequencing depth is a key parameter in next generation sequencing,which is closely related to the accuracy of sequencing results.Forensic biological evidence examination requires extremely high accuracy.It is crucial to scientifically and reasonably set the sequencing depth analysis threshold for forensic next generation sequencing testing.Methods This study used targeted sequencing data of microhaplotypes from 50 samples with known genotypes.By calculating the accuracy,precision,recall,and F1 score of each locus under various threshold conditions,two types of analysis threshold setting methods,which were based on fixed read count and fixed sequencing depth ratio,were studied extensively.Results The results showed that false positives were observed when the analysis threshold was set at 50×or 100×.When the analysis threshold was set at 200×,false negatives were observed.When the analysis threshold was set at 1.5%,3.0%,or 4.5%,false positives were observed.This study further proposed a third type of analysis threshold setting method,which was based on sequencing depth ratio scatter plots.With this method,no false positive or false negative was observed in the results.This article then explored four factors that lead to significant differences in the sequencing depth of forensic next generation sequencing experiments,compared with the analysis threshold setting method for capillary electrophoresis technology,and discussed the correlation between analysis thresholds and the ability to distinguish mixed DNA.Conclusion Employing the sequencing depth ratio scatter plot method to set analysis threshold has significant application value in next generation sequencing-based forensic genetic marker genotyping.

Objective To investigate the efficacy and safety of camrelizumab monoclonal antibody combined with molecular-targeted therapy in elderly patients with unresectable or advanced hepatocellular carcinoma(HCC).Methods A retrospective analysis was performed for the patients with unresectable/advanced HCC who attended six hospitals from January 1,2019 to March 31,2021,and all patients received camrelizumab monoclonal antibody treatment,among whom 84.8%also received targeted therapy.According to the age of the patients,they were divided into elderly group(≥65 years)and non-elderly group(＜65 years).The two groups were assessed in terms of overall survival(OS),progression-free survival(PFS),objective response rate(ORR),disease control rate(DCR),and immune-related adverse events(irAE).The chi-square test or the Fisher's exact test was used for comparison of categorical data between groups;the independent samples t-test was used for comparison of normally distributed continuous data,and the Mann-Whitney U test was used for comparison of non-normally distributed continuous data between two groups.The Kaplan-Meier method was used for survival analysis,and the log-rank test was used for comparison of survival curves.Univariate and multivariate Cox proportional hazards regression analyses were used to determine the independent influencing factors for PFS and DCR at 6 months.Results A total of 99 HCC patients were enrolled,with 27 in the elderly group and 72 in the non-elderly group.The elderly group had an OS rate of 67.8%,an ORR of 44.4%,and a DCR of 74.1%at 12 months and a median PFS of 6.4(95%confidence interval[CI]:3.0-12.4)months,with no significant differences compared with the non-elderly group(all P＞0.05).The median OS was unavailable for the elderly group,while the non-elderly group had an OS of 18.9(95%CI:13.0-24.8)months;there was no significant difference between the two groups(P=0.485).The univariate and multivariate Cox regression analyses showed that major vascular invasion(MVI)was an independent risk factor for PFS(hazard ratio[HR]=2.603,95%CI:1.136-5.964,P=0.024)and DCR(HR=3.963,95%CI:1.671-9.397,P=0.002)at 6 months,while age,sex,etiology of HBV infection,presence of extrahepatic metastasis,Child-Pugh class B,and alpha-fetoprotein＞400 ng/mL were not associated with PFS or DCR at 6 months.For the elderly group,the incidence rates of any irAE and grade 3/4 irAE were 51.9%and 25.9%,respectively,with no significant differences compared with the non-elderly group(P＞0.05),and skin disease was the most common irAE in both groups(39.4%).Conclusion Camrelizumab monoclonal antibody combined with molecular-targeted therapy has similar efficacy and safety in patients with unresectable/advanced HCC aged≥65 years and those aged＜65 years.MVI is associated with suboptimal response to immunotherapy and poor prognosis.

Objective:To explore the characteristics of the association between the triglyceride glucose (TyG) index and nonfatal cardio-cerebrovascular disease risk in a community population.Method:This was a prospective cohort study. From December 2011 to April 2012, the first investigation was conducted among subjects with more than 40-year old who were from Shijingshan district and Pingguoyuan community in Beijing. The second investigation was conducted from April to October 2015. All the subjects were divided into three groups according to the tertile of the TyG index at baseline. The multivariate Cox proportional risk regression model was established to explore the correlation between the TyG index and nonfatal cardio-cerebrovascular disease risk and the Kaplan-Meier survival curve of the TyG index group was drawn. Subgroup analyses were performed according to age, gender, body mass index, type 2 diabetes mellitus (T2DM), hypertension, and hyperlipidemia to determine the correlation characteristics between the TyG index and nonfatal cardio-cerebrovascular disease among subgroups.Results:A total of 9 577 subjects were finally included to analyze. The mean follow-up time of this study was (34.14±3.84) months. During the follow-up, 363 subjects (3.8%) occurred nonfatal cardio-cerebrovascular disease. The multivariate Cox regression analysis results showed that the hazard ratio ( HR) of nonfatal cardio-cerebrovascular disease in the high TyG index group was 1.54 (95% CI 1.19-1.98), 1.60 (95% CI 1.23-2.10), and 1.57 (95% CI 1.20-2.05) in the three models, compared with the low TyG index group. The Kaplan-Meier analysis showed that the risk of nonfatal cardio-cerebrovascular disease increased from the low-TyG index group to the high-TyG index group ( P=0.015). In the six subgroups analysis, only gender was shown to have a significant interaction effect with the TyG index and nonfatal cardio-cerebrovascular disease risk. In the female population, the risk of nonfatal cardio-cerebrovascular disease is significantly increased with the increase in the TyG index level ( P<0.001). Conclusions:A high TyG index is independently related to the increased risk of nonfatal cardio-cerebrovascular disease in the Beijing community population. Gender has a significant interaction with the TyG index and nonfatal cardio-cerebrovascular disease risk. Therefore, the TyG index may be a useful marker to predict the nonfatal cardio-cerebrovascular disease risk of a community population.

Objective:To evaluate the quality of domestic and foreign hospice care practice guidelines for cancer patients, so as to provide a basis for the future development of scientific and systematic hospice care guidelines for cancer patients or the formulation of evidence-based nursing practice plans for hospice care of cancer patients in China.Methods:Practice guidelines on hospice care for cancer patients were systematically retrieved from domestic and foreign databases, guidelines and professional society websites from the establishment of the database to July 25, 2020. Two investigators screened the guidelines strictly according to the inclusion and exclusion criteria, and evaluated the methodological quality of the included guidelines by using the currently internationally recognized guideline evaluation tool, the Appraisal of Guidelines for Research and Evaluation version Ⅱ (AGREE Ⅱ) .Results:A total of 14 guidelines were included for quality analysis, 9 guidelines were Grade A, 1 guidelines was Grade B, and 4 guidelines were Grade C. The average standardized scores of the 6 areas in AGREEⅡ of the 14 guidelines from high to low were scope and purpose (91.87%) , clarity (83.73%) , stakeholder (72.82%) , applicability (66.81%) , rigor (63.84%) and independence (58.04%) . The subject content analysis of 9 Grade A guidelines showed that common topics in the practice guidelines for hospice care of cancer patients included forming interdisciplinary teams, identification of end-of-life patients, assessment of end-of-life needs, end-of-life communication, providing of individualized nursing, end-of-life symptom management, bereavement support, support and training for nurses.Conclusions:Evidence-based guidelines for hospice care of cancer patients are lacking in China. The existing practice guidelines for hospice care of cancer patients in foreign countries are of high quality and cover a comprehensive range of topics, which can provide a reference for our country to formulate hospice care guidelines in line with national conditions or to transform the best evidence into our country's hospice care practice.

Brain Ischemia ; Cerebral Infarction ; Humans ; Subarachnoid Hemorrhage ; Vasospasm, Intracranial/etiology*

Objective To explore the related factors affecting postoperative pneumonia in patients with cavernous cerebrovascular malformation (CCM).MethodsClinical data of 151 CCM patients admitted to our hospital from January 2010 to January 2017 were retrospectively collected. Patients were divided into postoperative pneumonia group (n=11) and postoperative non-pneumonia group (n=140) according to the occurrence of postoperative pneumonia. Univariate Logistic regression analysis, multivariate Logistic regression analysis and receiver operating characteristic (ROC) curve were used to screen the relevant factors influencing the occurrence of postoperative pneumonia in CCM patients and evaluate the predictive value of relevant factors in postoperative pneumonia.ResultsAs compared with patients from postoperative non-pneumonia group, patients from postoperative pneumonia group had significantly increased modified Rankin scale (mRS) scores and significantly higher percentage of CCM combined with hemorrhage, and significantly decreased Glasgow coma scale (GCS) scores (P<0.05). Multivariate Logistic regression analysis showed that preoperative GCS scores (OR=4.75, 95％CI: 1.14-19.80,P=0.032) and mRS scores (OR=15.61, 95％CI: 3.22-75.58,P=0.001) were independent factors influencing the occurrence of postoperative pneumonia. ROC curve showed that the sensitivity and specificity of mRS scores≥4 to predict postoperative pneumonia were 45.5％ and 95.7％, respectively, and the sensitivity and specificity of GCS scores≤13 to predict postoperative pneumonia were 54.5％ and 85.7％, respectively.ConclusionFor CCM patients with preoperative GCS scores≤13 or mRS scores≥4, more attention should be paid to perioperative lung management and occurrence of postoperative pneumonia should be vigilant.

Objective To investigate whether brachial-ankle pulse wave velocity(baPWV),independently and jointly with the level of body mass index(BMI),affect the risk of incident diabetes with hypertension. Methods The effects of baPWV and BMI level on incident diabetes with hypertension were evaluated using Kaplan-Meier curves (log-rank test) and multi logistical regression models after adjustment for various confounding factors. Results A total of 2 222 participants were recruited in this study. Higher baPWV (Q4) was associated with a greater risk of incident diabetes with hypertension simultaneously compared with baPWV in the lower quartiles(Q1-Q3),with HR 4.16(95% CI 2.14,8.09)in the crude model,2.52(95% CI 1.10,5.78) in modelI,and 2.45(95% CI 1.05, 5.70)in modelⅡ.The highest risk of diabetes with hypertension simultaneously was in the group with high baPWV and BMI≥25 kg/m2,with HR 11.50(95% CI 4.5,29.9)in the crude model,4.20(95% CI 1.4,13.1)in modelI,and 4.30(95% CI 1.4,13.3) in modelⅡ. Conclusions The joint effect of baPWV and BMI level on incident diabetes with hypertension simultaneously is a better predictor than their independent effect. The risk of incident diabetes with hypertension markedly increases in the subjects with BMI≥25 kg/m2and higher baPWV.

OBJECTIVE:To investigate the effects of neoadjunctive chemotherapy(NAC)of docetaxel and epirubicin com-bined with cyclophosphamide on clinical efficacy and tumor markers of breast cancer patients with different molecular types. METH-ODS:A total of 88 female patients with locally advanced breast cancer collected from our hospital during Jan. 2014-Jan. 2016 were divided into Luminal A type(23 cases),Luminal B type(21 cases),basal-like type(11 cases),HER2-over expressing type(18 cases)and normal breast-like type(15 cases)according to molecular type. All patients were given Docetaxel injection+Epirubicin hydrochloride injection+Cyclophosphamide for injection for consecutive 6 cycles(21 d as a cycle). Total response rates and patho-logical complete remission(pCR)rates were compared among breast cancer patients with different molecular types. The expression of serum tumor markers [CEA,CA125,CA153] were compared before and after treatment,and the occurrence of ADR was record-ed. RESULTS:Total response rate of 88 patients was 63.64%,among which that of basal-like breast cancer patients was 72.73%, significantly higher than other molecular types,with statistical significance(P<0.05). There was no statistical significance in total response rates of pairwise molecular type comparison(P>0.05). The pCR rate of 88 patients was 27.27%,and that of basal-like breast cancer patients was the highest(45.45%). There was statistical significance in pCR rates of pairwise molecular type compari-son(P<0.05),except there was no significant difference in pCR rate between HER2-over expressing type and normal breast-like type(P>0.05). Before treatment,there was no statistical significance in the expression of CEA,CA125 and CA153 in breast can-cer patients with different molecular types(P>0.05). After treatment,the expression of CEA,CA125 and CA153 in different mo-lecular types were decreased significantly,with statistical significance(P<0.05). There was no statistical significance in the expres-sion of above markers among different molecular types(P>0.05). There was no statistical significance in the incidence of ADR among different molecular types(P>0.05). CONCLUSIONS:NAC plan of docetaxel and epirubicin combined with cyclophospha-mide can reduce the expression of tumor markers and shows certain therapeutic efficacy for breast cancer patients with different mo-lecular types. Total response rate and pCR rate of basal-like type are better than those of other molecular types,so NAC plan is the preferred treatment for basal-like type breast cancer.