Background and Aims:Pancreatic cancer(PC)is a highly lethal gastrointestinal malignancy with poorly understood pathogenesis.Previous studies suggest that alterations in plasma metabolomics may be associated with PC development;however,traditional observational studies are prone to confounding and reverse causation,making it difficult to establish causal relationships.This study employed a two-sample Mendelian randomization(MR)approach to systematically evaluate the potential causal relationship between 325 nuclear magnetic resonance(NMR)metabolites and PC risk.Methods:Genome-wide association study(GWAS)data of 325 NMR metabolites from the UK Biobank were integrated with GWAS data of PC from FinnGen.Single nucleotide polymorphisms(SNPs)significantly associated with metabolites were selected as instrumental variables.The inverse variance weighted method served as the primary analysis,supplemented by MR-Egger regression,weighted median,weighted mode,Bayesian weighted Mendelian randomization(BWMR),and constrained maximum likelihood(cML)for validation.Multiple sensitivity analyses were performed to assess the robustness of the results.Results:Four metabolites were identified to have significant causal associations with PC risk.Higher phospholipid-to-total lipid ratios in intermediate-density lipoproteins(IDL)(GCST90445881)and small high density lipoproteins(HDL)(GCST90446027),as well as higher free cholesterol-to-total lipid ratios in extremely large very-low-density lipoproteins(VLDL)(GCST90446151),were inversely associated with PC risk.Conversely,an elevated triglyceride-to-total lipid ratio in chylomicrons and extremely large VLDL(GCST90446157)was positively associated with increased PC risk.The findings were consistently supported by multiple sensitivity analyses.Conclusion:This study provides genetic evidence linking lipid metabolism alterations to PC risk.Elevated phospholipid and free cholesterol ratios appear protective,whereas increased triglyceride levels act as risk factors.These metabolite profiles may serve as promising biomarkers for early diagnosis and intervention in PC,offering novel insights for risk assessment and potential metabolic-targeted therapies.

Background and Aims:Pancreatic cancer(PC)is a highly lethal gastrointestinal malignancy with poorly understood pathogenesis.Previous studies suggest that alterations in plasma metabolomics may be associated with PC development;however,traditional observational studies are prone to confounding and reverse causation,making it difficult to establish causal relationships.This study employed a two-sample Mendelian randomization(MR)approach to systematically evaluate the potential causal relationship between 325 nuclear magnetic resonance(NMR)metabolites and PC risk.Methods:Genome-wide association study(GWAS)data of 325 NMR metabolites from the UK Biobank were integrated with GWAS data of PC from FinnGen.Single nucleotide polymorphisms(SNPs)significantly associated with metabolites were selected as instrumental variables.The inverse variance weighted method served as the primary analysis,supplemented by MR-Egger regression,weighted median,weighted mode,Bayesian weighted Mendelian randomization(BWMR),and constrained maximum likelihood(cML)for validation.Multiple sensitivity analyses were performed to assess the robustness of the results.Results:Four metabolites were identified to have significant causal associations with PC risk.Higher phospholipid-to-total lipid ratios in intermediate-density lipoproteins(IDL)(GCST90445881)and small high density lipoproteins(HDL)(GCST90446027),as well as higher free cholesterol-to-total lipid ratios in extremely large very-low-density lipoproteins(VLDL)(GCST90446151),were inversely associated with PC risk.Conversely,an elevated triglyceride-to-total lipid ratio in chylomicrons and extremely large VLDL(GCST90446157)was positively associated with increased PC risk.The findings were consistently supported by multiple sensitivity analyses.Conclusion:This study provides genetic evidence linking lipid metabolism alterations to PC risk.Elevated phospholipid and free cholesterol ratios appear protective,whereas increased triglyceride levels act as risk factors.These metabolite profiles may serve as promising biomarkers for early diagnosis and intervention in PC,offering novel insights for risk assessment and potential metabolic-targeted therapies.

Objective:To explore the mediating role of rumination thinking between demoralization and quality of life in malignant tumor patients, provide guidance and reference for helping tumor patients overcome rumination thinking and demoralization and improve quality of life.Methods:From February 2020 to June 2022, 189 patients with malignant tumors admitted to the Department of Oncology of the First Affiliated Hospital of Guangxi Medical University were selected by convenience sampling method as the research objects, and a cross-sectional survey was conducted using general information questionnaire, Demoralization Scale-Mandarin Version, Ruminative Responses Scale, Punctional Assessment of Cancer Therapy-General.Results:Among 189 malignant tumor patients, there were 102 males, 87 females, aged (43.54 ± 13.12) years old. The total score of loss of demoralization was (34.37 ± 10.34) points, the total score of rumination thinking was (41.01 ± 17.10) points, the total score of quality of life was (48.51 ± 15.41) points. The Pearson analysis results showed that the total score of demoralization in malignant tumor patients was negatively correlated with the total score of quality of life ( r = -0.502, P<0.01); the total score of rumination thinking was negatively correlated with the total score of quality of life ( r = -0.465, P<0.01), and the total score of demoralization was positively correlated with the total score of rumination thinking ( r = 0.628, P<0.01). Bootstrap mediation test results showed that ruminant thinking played a partial mediating effect between demoralization and quality of life of patients with malignant tumors, accounted for 30.9% of the total effect. Conclusions:Rumination plays a partially mediating role in the demoralization and quality of life of patients with malignant tumors, suggesting that clinical staff can improve the quality of life of patients with tumors by developing a systematic and comprehensive cognitive-behavioral intervention strategy to improve the demoralization and rumination.

BACKGROUND:Some studies have shown that the hounsfield units(HU)value based on lumbar CT can be used to screen osteoporosis.At present,the number of patients with pulmonary infection has increased;the number of patients with pulmonary infection and type 2 diabetes is also increasing,which increases the utilization rate of chest CT. OBJECTIVE:To investigate the role of lumbar 1 vertebral body HU value based on chest CT in the screening of type 2 diabetes mellitus osteoporosis. METHODS:The clinical data of 244 patients with type 2 diabetes mellitus treated in the First Affiliated Hospital of Chengdu Medical College from June 2020 to June 2022 were analyzed retrospectively.The bone mineral density was obtained by dual-energy X-ray absorptiometry.According to WHO's diagnostic criteria for osteoporosis,the subjects were divided into the non-osteoporosis group(n=120)and the osteoporosis group(n=124).The general condition,T value and HU value of lumbar 1 vertebra in chest CT were compared,and the relationship between the HU value and T value of each position was analyzed and the accuracy of type 2 diabetes mellitus osteoporosis was evaluated. RESULTS AND CONCLUSION:(1)There was no significant difference in sex,age,body mass index,glycosylated hemoglobin,mean blood glucose,calcium(Ca),phosphorus(P),time of type 2 diabetes mellitus,history of hypertension and history of hyperlipidemia between the two groups(P>0.05).(2)The HU value was positively correlated with the lowest T value of the hip(r=0.619,P<0.01);the HU value was positively correlated with the hip T value(r=0.584,P<0.01),and the HU value was positively correlated with the femoral neck T value(r=0.641,P<0.01).When the HU value was 98,the prediction of type 2 diabetes mellitus osteoporosis had good accuracy,and the sensitivity was 70.8%.(3)It is concluded that the HU value of the lumbar 1 vertebra based on chest CT examination is of good value for osteoporosis screening in patients with type 2 diabetes mellitus,and may be an opportunistic and cost-free supplementary screening method for type 2 diabetes mellitus osteoporosis.

Objective: To investigate the risk factors of poor graft function (PGF) after allogeneic hematopoietic stem cell transplantation (allo-HSCT) for severe aplastic anemia (SAA) . Methods: Clinical data from 111 SAA patients who received allo-HSCT were analyzed retrospectively. Factors including age, gender, interval to transplantation, the level of serum ferritin before transplantation were analyzed by Cox multivariate regression analysis. Results: Among the 111 patients who underwent allo-HSCT, 16 developed PGF (14.4%) . Multivariate analysis showed donor type (HR=2.656, 95%CI 1.204-5.858, P= 0.016) and the level of serum ferritin before tansplantation (HR=3.170, 95%CI 1.400-7.180, P=0.006) were significant risk factors for PGF. Conclusion Unrelated donor transplantation and the high level of serum ferritin before transplantation are risk factors for PGF.

A hugh performance luquud chromatographuc ( HPLC) method was extablushed for determunatuon of the content of 7 polycycluc aromatuc hydrocarbons ( PAHs) un soul and earthworm samples based on accelerated solvent extractuon ( ASE) for extractuon and solud phase extractuon ( SPE) column for sample purufucatuon. In thus method, the samples were furst extracted by the muxed solutuon of n-hexane and acetone extractuon (4∶1, V/V) , and then purufued by SPE column ( suluca gel column for soul sample purufucatuon and Al2 O3-suluca gel column for earthworm sample purufucatuon ) , eluted by 10 mL of elutuon of n-hexane and duchloromethane (9∶1, V/V), and evaporated to dryness wuth rotary evaporator. After that, the pretreated samples were re-dussolved wuth acetonutrule to a constant volume, followed by a fultratuon wuth a 0. 22-μm organuc fulter membrane for the quantufucatuon by HPLC. The recoverues of the method for 7 PAHs were 83. 5%-110. 2% un soul samples and 81. 2%-97. 1% un earthworm samples. The detectuon lumuts of the method for 7 PAHs were 0. 15-0. 85 μg/kg. The method had good reproducubuluty and met the qualuty control requurements of sample analysus.

ABSTRACT:Objective To observe the effects of late Na current (INa‐L ) and rapidly activating delayed rectifier K current (IKr ) on ventricular heterogeneity and frequency dependency by using high resolution voltage sensitive optical mapping technology .Methods The model of 12 isolated hearts was constructed in rabbits . Voltage sensitive dye Di‐4‐ANEPPS were perfused into the isolated hearts by Langendorff method .LED source with the wave length of 532 nm was used to record APD80 and APD50 of the left and right ventricles .Experimental groups were divided into 3 groups by perfusion drugs dofetillide (30 nmol/L) ,dofetillide+ATX‐Ⅱ(1 nmol/L) ,and dofetillide +ATX‐Ⅱ +mexiletine (10μmol/L) .The subjects were intervened by the above drugs in order ,and they were self‐compared before dosing .After each drug administration ,the hearts were stimulated respectively with the BCL of 2 000 ms ,1 000 ms ,500 ms ,and 300 ms .Then we observed the changes of APD80 and APD50 in the left and right ventricles before and after the interventions .Results ① In the control group ,APD80 and APD50 of the right ventricle were longer than those of the left ventricle in response to different stimulation , and the differences increased with the decrease of stimulating frequency .② When BCL was 1000 ms ,APD80 and APD50 of the left and right ventricles were prolonged respectively after administration of dofetillide , but the differences in APD80 and APD50 were insignificant between the left and right ventricles (P>0 .05) .ΔAPD80 of the two ventricles increased significantly with the decrease of stimulating frequency . ③ After administration of ATX‐Ⅱ , when BCL was 1000 ms ,APD80 and APD50 of the left and right ventricles increased significantly compared with those in the control group and dofetillide intervention group (P<0 .05) .And the increase of APD in the left ventricle was greater than that of the right ventricle .ΔAPD80 of the two ventricles increased significantly with the decrease of stimulating frequency .④ After administration of mexiletine ,when BCL was 1000 ms ,APD80 and APD50 of the left and right ventricles reduced significantly compared with those of the primary state (P<0 .05) .APD80 and APD50 of the left and right ventricles reduced significantly compared with those of the control group (P< 0 .05) and ATX‐Ⅱ group (P>0 .05) .The increase of ΔAPD80 of the two ventricles became milder when the stimulating frequency decreased . Conclusion ① IKr blocked by dofetillide did not affect the heterogeneity between the two ventricles , which showed reverse‐frequency dependence . ② In the context of blocking IKr , ATX‐Ⅱ increased the heterogeneity between the left and right ventricles and enhanced the reverse‐frequency dependence .In contrast ,mexiletine ,the blocker of INa‐L ,decreased the heterogeneity between the two ventricles and reverse‐frequency dependence .

Objective To investigate the efficacy of hyperbaric oxygen (HBO) in the treatment of dizziness following spontaneous cerebellar hemorrhage.Methods Seventy-six patients with dizziness after spontaneous cerebellar hemorrhage were divided into 2 groups:the treatment group (44 cases) treated with HBO combined with psychological and drug therapy,and the control group (32 cases) treated only with psychological and drug therapy.Therapeutic efficacy was compared between the 2 groups.Results For the treatment group,22 cases were cured,19 cases were improved and 3 cases were ineffective,with a total effective rate of 93.18％ (41/44),while for the control group,5 cases were cured,16 cases were improved and 11 cases were ineffective,with a total effective rate of 65.63％ (21/32).Statistical significance could be seen in total effective rate,when comparisons were made between the 2 groups (x2 =9.36,P ＜ 0.01).Conclusions In the treatment of dizziness following spontaneous cerebellar hemorrhage,HBO was an effective and non-invasive treatment method,which could obviously improve life quality of the patients with cerebellar hemorrhage.

Objective To investigate the efficacy of hyperbaric oxygen (HBO) in the treatment of dizziness following spontaneous cerebellar hemorrhage.Methods Seventy-six patients with dizziness after spontaneous cerebellar hemorrhage were divided into 2 groups:the treatment group (44 cases) treated with HBO combined with psychological and drug therapy,and the control group (32 cases) treated only with psychological and drug therapy.Therapeutic efficacy was compared between the 2 groups.Results For the treatment group,22 cases were cured,19 cases were improved and 3 cases were ineffective,with a total effective rate of 93.18％ (41/44),while for the control group,5 cases were cured,16 cases were improved and 11 cases were ineffective,with a total effective rate of 65.63％ (21/32).Statistical significance could be seen in total effective rate,when comparisons were made between the 2 groups (x2 =9.36,P ＜ 0.01).Conclusions In the treatment of dizziness following spontaneous cerebellar hemorrhage,HBO was an effective and non-invasive treatment method,which could obviously improve life quality of the patients with cerebellar hemorrhage.

Objective To explore the risk factors of the chronic subdural hematoma(CSDH) drilling drainage recurrence.Methods The clinical data of 252 CSDH patients were retrospectively analyzed.All patients underwent trephination and drainage treatment,there were 40 cases with postoperative recurrence of hematoma.Multivariate logistic analysis of linear regression was used to analyze the risk factors for postoperative hematoma recurrence.Results In this study,of 252 CSDH patients received trepanation and hematoma,the probability of recurrence was 15.9 ％ (40/252).Single factor analysis showed that the size of hematoma,CT shows the density of hematoma,postoperative drainage volume,operation time,review the CT intracranial pneumatosis,age,hematoma midline shift could increase the recurrence possibility.Logistic multivariate analysis showed that he size of hematoma,CT shows the density of hematoma,postoperative drainage volume,age were independent risk factors of recurrence of hematoma drainage in patients with CSDH after drilling.Conclusion The influence factor of recurrence of hematoma in CSDH patients received trepanation and drainage is complex,we should strengthen the intraoperative,postoperative nursing and operation to reduce postoperative recurrence of CSDH.