Prognostic utility of gamma-glutamyl transpeptidase to platelet ratio in patients with solitary hepatitis B virus-related hepatocellular carcinoma after hepatectomy

BACKGROUND The prognostic impact of preoperative gamma-glutamyl transpeptidase to platelet ratio(GPR)levels in patients with solitary hepatitis B virus(HBV)-related hepatocellular carcinoma(HCC)following radical resection has not been established.AIM To examine the clinical utility of GPR for prognosis prediction in solitary HBVrelated HCC patients.METHODS A total of 1167 solitary HBV-related HCC patients were retrospectively analyzed.GPR levels were compared with 908 non-HCC individuals.Overall survival(OS)and recurrence-free survival(RFS)were evaluated,and cox proportional hazard model analyses were performed to identify independent risk factors.Differences in characteristics were adjusted by propensity score matching(PSM).Subgroup and stratified survival analyses for HCC risks were performed,and a linear trend of the hazard ratio(HR)according to GPR levels was constructed.RESULTS GPR levels of patients with solitary HBV-related HCC were higher than those with hepatic hemangiomas,chronic hepatitis B and healthy control(adjusted P<0.05).Variable bias was diminished after the PSM balance test.The low GPR group had improved OS(P<0.001)and RFS(P<0.001)in the PSM analysis and when combined with other variables.Multivariate cox analyses suggested that low GPR levels were associated with a better OS(HR=0.5,95%CI:0.36-0.7,P<0.001)and RFS(HR=0.57,95%CI:0.44-0.73,P<0.001).This same trend was confirmed in subgroup analyses.Prognostic nomograms were constructed and the calibration curves showed that GPR had good survival prediction.Moreover,stratified survival analyses found that GPR>0.6 was associated with a worse OS and higher recurrence rate(P for trend<0.001).CONCLUSION Preoperative GPR can serve as a noninvasive indicator to predict the prognosis of patients with solitary HBVrelated HCC.

Retrieving chlorophyll content and equivalent water thickness of Moso bamboo(Phyllostachys pubescens) forests under Pantana phyllostachysae Chao-induced stress from Sentinel-2A/B images in a multiple LUTs-based PROSAIL framework

Biochemical components of Moso bamboo(Phyllostachys pubescens)are critical to physiological and ecological processes and play an important role in the material and energy cycles of the ecosystem.The coupled PROSPECT with SAIL(PROSAIL)radiative transfer model is widely used for vegetation biochemical component content inversion.However,the presence of leaf-eating pests,such as Pantana phyllostachysae Chao(PPC),weakens the performance of the model for estimating biochemical components of Moso bamboo and thus must be considered.Therefore,this study considered pest-induced stress signals associated with Sentinel-2A/B images and field data and established multiple sets of biochemical canopy reflectance look-up tables(LUTs)based on the PROSAIL framework by setting different parameter ranges according to infestation levels.Quantitative inversions of leaf area index(LAI),leaf chlorophyll content(LCC),and leaf equivalent water thickness(LEWT)were derived.The scale conversions from LCC to canopy chlorophyll content(CCC)and LEWT to canopy equivalent water thickness(CEWT)were calculated.The results showed that LAI,CCC,and CEWT were inversely related with PPC-induced stress.When applying multiple LUTs,the p-values were<0.01;the R2 values for LAI,CCC,and CEWT were 0.71,0.68,and 0.65 with root mean square error(RMSE)(normalized RMSE,NRMSE)values of 0.38(0.16),17.56μg cm-2(0.20),and 0.02 cm(0.51),respectively.Compared to the values obtained for the traditional PROSAIL model,for October,R2 values increased by 0.05 and 0.10 and NRMSE decreased by 0.09 and 0.02 for CCC and CEWT,respectively and RMSE decreased by 0.35μg cm-2 for CCC.The feasibility of the inverse strategy for integrating pest-induced stress factors into the PROSAIL model,while establishing multiple LUTs under different pest-induced damage levels,was successfully demonstrated and can potentially enhance future vegetation parameter inversion and monitoring of bamboo forest health and ecosystems.

CHLOROPHYLL FLUORESCENCE RATIO F685/F735 IN BROWN ALGAE AND ITS VARIATION UNDER EXCITATION BY TWO TYPES OF LIGHT AND DEHYDRATION

Calculation and comparative study of the chlorophyll fluorescence ratio F685/F735 in brown algae (Laminaria japonica, Underia pinnatifida and Padina crassa) excited by blue and green light showed that the fluorescence ratios were higher when the algae were excited by blue light (440 nm), but reduced obviously under green light (540 nm) excitation. The values also reduced under dehydration but could recover during rehydration if the stress was not serious. The variation of the fluorescence ratio under dehydration was mainly because changes in fluorescence emission at 735 nm were always sharper than those at 685 nm. The ratio was sensitive to stress and has potential as a stress indicator in phycological research. Measurement of the fluorescence excitation spectra showed that the only peak at 540 hm changed apparently during dehydration. It meant that the function of the Chl a /Fucoxanthin protein complex for energy transfer was easily inhibited by water stress. However, no variation of the ratio was

Antioxidase System of a Rice Mutant with Low Chlorophyll b

[Objective] The mitigative effect of antioxidase system of a rice mutant with low chlorophyll b on photooxidative damage was studied.[Method] A rice mutant with low chlorophyll b and its wild type were taken as experimental materials to comparatively research their peroxide (H2O2) contents, the activity and isozymes of superoxide dismutase (SOD), catalase (CAT) and peroxidase (POD) in chloroplast.[Result] Compared with the wild type, there were many kinds of SOD, POD and CAT isozymes in leaf cells and chloroplast cell of mutant, and the activity of SOD, POD and CAT isozymes in leaf cells and chloroplast cell of mutant was also correspondingly higher. Under intense light condition, the H2O2 content of chloroplast in mutant was less than that in the wild type. [Conclusion] The higher activity of scavenging active oxygen can relieve the photooxidative damage made by excessive light energy of intense light on photosynthetic membrane, which is an important reason for higher photosystem Ⅱ (PS II) stability of this mutant.

Study on a Mutant with Low Content Chlorophyll b in a High Yielding Rice and Its Photosynthesis Properties

A high yielding rice mutant ( Oryza sativa L. cv. Zhenhui 249) with low chlorophyll b was recently discovered in the field. The mutant was mainly characterized by the decrease of the content of extrinsic antennae complex. This variation was shown in the stage when the leaves were expanding. When the leaves are at the final developmental stage, the content would approach to that of the wild type. It was discovered that only moderate amount of chlorophyll b decreased in this mutant. The photosynthetic apparatus of the mutant was rather stable in the whole life span of the leaf. The extrinsic antennae complex of the mutant might make efficient use of light and meanwhile reduce the production of O -· 2.

急性B淋巴细胞白血病儿童乳酸脱氢酶、前白蛋白及二者比值与化疗早期疗效的相关性

目的:探讨急性B淋巴细胞白血病(B-ALL)患儿乳酸脱氢酶(LDH)、前白蛋白(PA)及二者比值(LPR)与化疗早期疗效的相关性。方法:选取2020年5月至2022年5月我院收治的B-ALL患儿126例,观察患儿初诊时(化疗前,T0)、化疗第3 d(T1)、化疗第33 d(T2)的LDH、PA水平及LPR值。按照化疗第33 d微小残留病比例,将患儿分为疗效良好组(n=94)和疗效不良组(n=32),采用logistic回归分析化疗早期疗效的影响因素。结果:T1时患儿LDH及LPR低于T0,且T2低于T1(P<0.05);T2时PA高于T1(P<0.05)。临床危险度为高危、T0-WBC≥100×10~9/L、T0及T2时的LPR较高是患儿化疗早期疗效不良的危险因素(P<0.05)。结论:化疗后,B-ALL患儿LDH及LPR呈逐渐下降趋势,PA呈逐渐上升趋势,LPR与患儿化疗早期疗效具有相关性。

高效液相色谱法测定食品中叶绿素a和叶绿素b的含量

目的建立高效液相色谱法测定食品中叶绿素含量的方法。方法以提取溶剂、提取方式、提取时间为考察因素,设计正交试验,对绿宝石甜瓜、黑米和菠菜中叶绿素的提取条件进行选择,确定提取叶绿素最优条件为甲醇溶液超声提取2 min。色谱条件为C_(18)色谱柱(150 mm×4.6 mm,5μm),柱温30℃,甲醇为流动相,等度洗脱,流速1.0 mL/min,叶绿素a吸收波长是665 nm,叶绿素b吸收波长是468 nm。结果叶绿素a和叶绿素b在0.50~20.00μg/mL范围内与峰面积有良好的线性关系。绿宝石甜瓜、黑米、菠菜中叶绿素a和叶绿素b精密度的相对标准偏差均小于10%,加标回收率均在90.0%~110.0%之间,表明方法精密度好,添加回收率高。结论试验建立的方法重复性好、准确度高,可以准确定量食品中叶绿素的含量。

T-SPOT联合颗粒酶B阳性Ts淋巴细胞对成人结核病诊断的价值

目的探讨结核感染T细胞斑点试验(T-SPOT.TB)联合颗粒酶B(GrB)+CD8^(+)T淋巴细胞在诊断结核病中的价值。方法选取南昌大学第一附属医院2021年2月至2022年3月疑似结核病患者212例,所有患者均保留T-SPOT结果,流式细胞仪检测外周血中T淋巴细胞亚群及其穿孔素和GrB的表达,根据出院最终诊断分为结核病组和非结核病组,比较两组间T-SPOT斑点数和淋巴细胞亚群及其穿孔素和GrB表达差异,ROC曲线分析ESAT-6斑点数,CFP-10斑点数,结核特异性抗原(TBAg)与植物血凝素(PHA)斑点数的比值(TBAg/PHA)(ESAT-6/PHA和CFP-10/PHA中较大的一个),GrB^(+)Ts(CD8^(+)T)及“结核比值”[TBAg/(PHA*GrB^(+)Ts)]的诊断效能。结果GrB^(+)Ts细胞百分比在结核组中显著高于非结核组(44.95±2.98 vs 33.49±1.87,P<0.05),而总T细胞、穿孔素+T细胞,GrB^(+)T细胞,Ts细胞和穿孔素+Ts细胞百分比差异无统计学意义(P>0.05);非结核组T-SPOT.TB阳性率为51.85%,明显低于结核组的92%,且结核组的A抗原斑点数及B抗原斑点数显著大于非结核组(P<0.05),ROC曲线显示A抗原诊断结核病的灵敏度和特异性分别为80.0%和56.8%,曲线下面积(AUC)为0.748,约登指数为0.368;B抗原的灵敏度和特异性为分别62.0%和77.8%,AUC为0.758,约登指数为0.398;A抗原+B抗原灵敏度和特异性为72.0%和74.1%,AUC为0.796,约登指数为0.461;结核组的TBAg/PHA比率要显著高于非结核组(1.21±0.17 vs 0.26±0.02,P<0.001)以0.59为cut-off值时,诊断结核病的灵敏度和特异性分别为66%和91.4%,AUC高达0.852,约登指数为0.574;结核组的“结核比值”要显著高于非结核组(4.58±0.87 vs 1.71±0.24,P<0.01),以1.24为cut-off值时,诊断结核病的灵敏度和特异性分别为82.0%和72.2%,AUC为0.794,约登指数为0.542。结论应用TBAg/PHA比率和TBAg/(PHA*GrB^(+)Ts)比值诊断结核病的效能要优于常规的T-SPOT检测,两者结合使用对结核病诊断可能具有重要价值。

Lymphocyte-to-white blood cell ratio is associated with outcome in patients with hepatitis B virus-related acute-on-chronic liver failure

BACKGROUND The lymphocyte-to-white blood cell ratio(LWR)is a blood marker of the systemic inflammatory response.The prognostic value of LWR in patients with hepatitis B virus-associated acute-on-chronic liver failure(HBV-ACLF)remains unclear.AIM To explore whether LWR could stratify the risk of poor outcomes in HBV-ACLF patients.METHODS This study was conducted by recruiting 330 patients with HBV-ACLF at the Department of Gastroenterology in a large tertiary hospital.Patients were divided into survivor and non-survivor groups according to their 28-d prognosis.The independent risk factors for 28-d mortality were calculated by univariate and multivariate Cox regression analyses.Patients were divided into low-and high-LWR groups according to the cutoff values.Kaplan-Meier analysis was performed according to the level of LWR.RESULTS During the 28-d follow-up time,135 patients died,and the mortality rate was 40.90%.The LWR level in non-surviving patients was significantly decreased compared to that in surviving patients.A lower LWR level was an independent risk factor for poor 28-d outcomes(hazard ratio=0.052,95%confidence interval:0.005-0.535).The LWR level was significantly negatively correlated with the Child-Turcotte-Pugh,model for end-stage liver disease,and Chinese Group on the Study of Severe Hepatitis B-ACLF II scores.In addition,the 28-d mortality was higher for patients with LWR<0.11 than for those with LWR≥0.11.CONCLUSION LWR may serve as a simple and useful tool for stratifying the risk of poor 28-d outcomes in HBVACLF patients.

外周血血小板与淋巴细胞的比值及淋巴细胞与单核细胞的比值与老年眼眶弥漫性大B细胞淋巴瘤的相关性

目的探讨外周血常规检测各项指标及比值与眼眶弥漫性大B细胞淋巴瘤(diffuse large B-cell lymphoma,DLBCL)的相关性。方法本研究为病例对照研究,收集2015年1月-2022年12月于复旦大学附属肿瘤医院确诊为眼眶DLBCL老年患者作为疾病组(眼眶DLBCL组),原发性中枢神经系统DLBCL患者作为疾病对照组(PCNSL-DLBCL组),以及健康人群作为健康对照组。使用方差分析比较3组间血常规检测的各项参数的差异。Lasso回归筛选出眼眶DLBCL的关键因素,并通过Logistic回归确认。绘制ROC曲线,计算线下面积。结果3组之间年龄与性别相匹配(P>0.05)。相较于健康对照组,眼眶DLBCL组的单核细胞计数(M)、血小板与淋巴细胞的比值(PLR)、中性粒细胞与淋巴细胞的比值(NLR)、系统性免疫炎症指数(SII)、红细胞分布宽度(RDW)、乳酸脱氢酶(LDH)显著升高,而淋巴细胞计数(L)、淋巴细胞与单核细胞比值(LMR)显著降低,差异均具有统计学意义(P<0.05)。Lasso回归分析显示,PLR和LMR是眼眶DLBCL病变的重要影响因素。进一步Logistic回归分析发现,L降低(OR,11.1868;95%CI,4.222229.6401;P<0.0001)、M升高(OR,1.8990;95%CI,1.488929.6401;P<0.0001)、PLR升高(OR,1.0609;95%CI,1.02251.1009;P=0.0017)和NLR升高(OR,4.5157;95%CI,2.71277.5170;P<0.0001)是眼眶DLBCL的独立危险因素,而LMR升高是DLBCL的保护因素(OR,0.3923;95%CI,0.22970.6698;P=0.006)。ROC曲线分析发现,PLR与LMR联合运用对眼眶DLBCL具有一定的诊断价值(AUC=0.877)。结论外周血PLR和LMR与眼眶DLBCL相关。PLR升高和LMR减低可能是眼眶DLBCL病变的危险因素,为疾病探索新的生物标志物提供初步临床检验学证据。

比较C反应蛋白与白蛋白比值和格拉斯哥预后评分对弥漫大B细胞淋巴瘤患者预后判断的价值

目的:探讨并比较基于C反应蛋白(CRP)和白蛋白(ALB)的两种预测模型——CRP与ALB比值(CAR)和格拉斯哥预后评分(GPS)——在新诊断弥漫大B细胞淋巴瘤(DLBCL)患者预后评估中的价值。方法:回顾性分析本院2014年5月至2022年1月收治的初诊DLBCL患者的资料,纳入至少完成4个周期R-CHOP或R-CHOP样方案化疗,且临床、实验室检查数据以及随访资料均完整的111例患者。根据患者治疗前CAR及随访截止时的生存状态绘制受试者工作特征曲线(ROC),初步判断CAR对疾病进展和生存结局的预测价值,进一步分析CAR与患者基线临床、实验室特征的关系,并比较不同CAR、GPS分组患者的无进展生存期(PFS)和总生存期(OS),采用单因素和多因素COX风险比例回归模型分析影响疾病预后的因素。结果:ROC曲线分析结果显示,CAR预测DLBCL患者PFS、OS的曲线下面积(AUC)分别为0.687(P=0.002),0.695(P=0.005),最佳截断值均为0.11;相较于低CAR(<0.11)组,高CAR(≥0.11)组患者具有更多的临床高危因素,包括年龄>60岁(P=0.025)、ECOG评分≥2分(P=0.004)、Lugano分期III-IV期(P<0.001)、non-GCB亚型(P=0.035)、乳酸脱氢酶升高(P<0.001)、结外病变数>1处(P=0.004)及IPI评分>2分(P<0.001)。对患者进行中期疗效评估,低CAR组患者的总有效率(ORR)及完全缓解率(CRR)均明显优于高CAR组(ORR:96.9%vs 80.0%,P=0.035;CRR:63.6%vs 32.5%,P=0.008)。中位随访24个月,低CAR组患者的中位PFS及OS均明显优于高CAR组(中位PFS:未达到vs 67个月,P=0.0026;中位OS:未达到vs 67个月,P=0.002),而GPS 0分、1分和2分3组患者的PFS(P=0.11)和OS(P=0.11)差异均不具有统计学意义。多因素分析显示,仅有性别为男性和IPI评分>2分是影响患者PFS和OS的独立危险因素。结论:CAR与DLBCL患者的疾病进展和生存显著相关;与GPS相比,CAR对患者的预后判断价值更大。

IL-6、CRP、NLR和NT-proBNP对老年心力衰竭合并肺炎的诊断价值

目的探讨白细胞介素-6(IL-6)、C-反应蛋白(CRP)、中性粒细胞与淋巴细胞比值(NLR)和N末端前脑钠肽前体(NT-proBNP)对老年心力衰竭(以下简称心衰)合并肺炎的诊断价值。方法选取2022年4月至2023年4月该院收治的165例老年心衰患者作为研究对象,根据是否合并肺炎分为心衰合并肺炎组(78例)和单纯心衰组(87例),根据美国纽约心脏病协会(NYHA)心功能分级标准分为Ⅱ级组(59例)和Ⅲ级+Ⅳ级组(106例)。比较各组IL-6、CRP、NT-proBNP水平和NLR;采用Spearman相关分析IL-6、CRP、NLR与NT-proBNP水平的相关性;采用受试者工作特征(ROC)曲线评估IL-6、CRP、NLR、NT-proBNP单独及联合检测对心衰患者合并肺炎的诊断效能。结果心衰合并肺炎组IL-6、CRP、NT-proBNP水平及NLR明显高于单纯心衰组(P<0.05),Ⅲ级+Ⅳ级组IL-6、CRP、NT-proBNP水平及NLR明显高于Ⅱ级组(P<0.05)。Spearman相关性分析结果显示,NT-proBNP水平与IL-6、CRP、NLR水平呈正相关(r=0.263、0.419、0.468,P<0.001)。IL-6、CRP、NLR和NTproBNP联合诊断心衰合并肺炎的曲线下面积(AUC)为0.726(95%CI:0.650~0.803),灵敏度为67.9%,特异度为71.3%。结论心衰合并肺炎患者IL-6、CRP、NT-proBNP水平和NLR明显高于单纯心衰患者,上述4项指标联合检测对心衰合并肺炎患者有一定的诊断效能。

REVERSE VARIABLE-ANGLE SYNCHRONOUS SPECTROFLUORIMETRY FOR RAPID SIMULTANEOUS DETERMINATION OF CHLOROPHYLL A AND CHLOROPHYLL B

Rapid simultaneous determination of chlorophyll a and chlorophyll b by reverse variable-angle synchronous spectrofluorimetry has been studied on a laboratory-constructed microcomputer-controlled versatile spectrofluorimeter.A method in estimation of scan parameters for the determination of two-component system by variable-angle synchronous spectrofluorimetry has been suggested

LMR/LDH对弥漫大B细胞淋巴瘤合并乙型病毒性肝炎患者预后的价值

目的探讨外周血淋巴细胞/单核细胞比值(LMR)与乳酸脱氢酶(LDH)的比值(LMR/LDH)对弥漫大B细胞淋巴瘤(DLBCL)合并乙型病毒性肝炎患者预后的价值。方法选取DLBCL合并乙型病毒性肝炎患者77例为研究对象,收集患者的临床资料[性别、年龄、临床分期、B症状、美国东部肿瘤协作组(ECOG)评分、淋巴结外受累数量、国际预后指数(IPI)分级等];抽取治疗前空腹抗凝全血及静脉血,采用电阻抗、高频电导及激光散射联合检测法检测淋巴细胞绝对值和单核细胞绝对值并计算LMR,采用紫外分光光度法和免疫比浊法检测血清乳酸脱氢酶(LDH)和β2-微球蛋白(β2-MG);所有患者出院后随访36个月,记录患者的总生存期(OS)及无进展生存期(PFS);采用患者工作特征(ROC)曲线确定LMR/LDH的临界值,分析LMR/LDH高低对患者OS及PFS的影响;采用COX回归模型分析LMR/LDH与患者临床特征的关系。结果ROC曲线分析显示,LMR/LDH的临界值为0.008,敏感度和特异度分别为0.6607和0.7619,曲线下面积(AUC)为0.7054(95%CI为0.5491~0.8937,P=0.0057);LMR/LDH与临床分期、ECOG评分、淋巴结外受累数量、IPI、LDH、β2-MG相关(P<0.05);单因素分析显示,LMR/LDH、临床分期、ECOG≥2分、淋巴结外受累数量≥2个、IPI、LDH及β2-MG对患者OS及PFS均有影响(P<0.05);多因素分析显示,LMR/LDH是影响DLBCL合并乙型病毒性肝炎患者OS及PFS的独立危险因素(P<0.05);高LMR/LDH组的OS与PFS高于低LMR/LDH组。结论LMR/LDH对DLBCL合并乙型病毒性肝炎患者的预后有一定的临床预测价值。

LMR和CD163^(+)TAM对弥漫大B细胞淋巴瘤患者预后的评估价值

目的:探究淋巴细胞和单核细胞比值(LMR)和CD163^(+)肿瘤相关巨噬细胞(TAM)对弥漫大B细胞淋巴瘤(DLBCL)患者预后的评估价值。方法:收集63例初诊DLBCL患者外周血和淋巴结组织。检测患者血常规,得出淋巴细胞和单核细胞数量,计算出LMR。采用免疫组化方法检测淋巴结组织中CD163^(+)TAM数量。采用ROC曲线确定LMR和CD163^(+)TAM的截断值,分析LMR和CD163^(+)TAM与DLBCL患者预后指标的相关性。结果:63例初诊DLBCL患者的LMR的水平为3.69±1.71,CD163^(+)TAM的中位值为26/HPF。CD163^(+)TAM与LMR呈负相关(r=-0.58),与单核细胞计数呈正相关(r=0.46)。采用ROC曲线确定LMR和CD163^(+)TAM临界值分别为2.95和29/HPF,并以此将患者分为低LMR组和高LMR组以及低CD163^(+)TAM组和高CD163^(+)TAM组。低LMR组临床分期Ⅲ-Ⅳ期、IPI评分3-5分以及存在骨髓浸润的患者比例均明显高于高LMR组(P<0.05)。高CD163^(+)TAM组临床分期Ⅲ-Ⅳ期、IPI评分3-5分、LDH水平升高以及存在骨髓浸润的患者比例均明显高于低CD163^(+)TAM组(P<0.05)。LMR与OS呈正相关(r=0.43),CD163^(+)TAM比例与OS呈负相关(r=-0.65)。低LMR组和高CD163^(+)TAM组的DLBCL患者具有更短的OS(P<0.05)。结论:低LMR和高CD163^(+)TAM可以作为DLBCL患者预后不良的生物学标志。

微电解-芬顿-水解酸化-MBBR组合工艺在溴阻燃剂废水处理中的应用

溴阻燃剂废水具有难降解有机物含量高、废水毒性大、COD_(Cr)浓度高、B/C低、可生化性差的特点,处理难度大,采用微电解-芬顿-水解酸化-MBBR组合工艺对山东某化工有限公司污水处理站进行改造,代替原有的活性污泥工艺,系统运行结果表明:经组合工艺处理后溴阻燃剂废水的COD_(Cr)质量浓度由7 500 mg/L降到800 mg/L,COD_(Cr)去除率接近90%,去除效果明显,并且系统能够长时间连续稳定运行,说明该组合工艺在溴阻燃剂废水处理中具有一定的推广应用价值。

血常规衍生指标与HBV-DNA载量及ALT关系的研究

目的:选择中性粒细胞淋巴细胞比值(NLR)、血小板淋巴细胞比值(PLR)和血清谷丙转氨酶(ALT)、HBV-DNA作为研究指标,通过分析HBV感染者外周血NLR、PLR的表达与疾病进程及HBV-DNA载量和ALT的关系,探讨NLR和PLR在慢性乙型肝炎患者病情发展的临床意义。方法:收集慢性乙型肝炎患者475例外周血标本,检测血常规、肝功能和乙肝DNA水平,按照HBV-DNA载量水平不同分为阴性组(作为对照组)、低拷贝组、中拷贝组、高拷贝组,分别比较HBV-DNA升高组与阴性组外周血NLR、PLR水平,分析其差异性;同时按照ALT升高水平分为轻、中、重度三个观察组和正常对照组,分别比较观察组与正常组对应的外周血NLR、PLR水平,查找规律;对HBV-DNA阳性的患者在进行药物治疗过程中,监测血NLR、PLR水平变化。结果:NLR与疾病的进展有一定的相关性,其中中拷贝组和高拷贝组与阴性组比较,差异有统计学意义(P均<0.05);而PLR与HBV-DNA未发现有显著相关性,但三个升高组与阴性组比较,PLR数值差异有统计学意义(P均<0.05);随着ALT的逐步升高,NLR也随着升高,轻度和中度升高组,NLR变化不大,但重度升高组与正常组比较,差异有统计学意义(P<0.05);而PLR与ALT的关系不大,差异无统计学意义(P均>0.05);在抗病毒治疗的早期,由于淋巴细胞数量的减少,NLR和PLR会一时性升高。结论:NLR和PLR具有评估慢性HBV感染患者肝脏炎症活动度的临床应用价值,持续动态检测这两个指标的变化对慢性乙肝患者的病情预判有一定的指导作用。

AARC-ACLF评分联合NLR对HBV相关慢加急性肝衰竭短期预后的评估价值

目的探究亚太肝脏研究协会ACLF(AARC-ACLF)评分联合中性粒细胞与淋巴细胞比值(NLR)对HBV相关慢加急性肝衰竭(ACLF)短期预后的预测价值。方法选择94例HBV相关ACLF患者作为研究对象,于入组24 h内检测NLR,计算AARC-ACLF评分。根据临床疗效及生存情况,分为转归良好组及不佳组。分析HBV相关ACLF患者病情转归的影响因素。评估AARC-ACLF评分和血清NLR水平对HBV相关ACLF预后的预测效能。结果94例受试者中,转归良好58例,转归不佳36例。转归不佳组凝血酶原时间(PT)、总胆红素(TBil)、白细胞(WBC)、NLR及AARC-ACLF评分分别为(26.68±6.91)s、(330.2±126.4)μmol/L、(6.67±2.06)×10^(9)/L、6.45±2.76、(10.14±1.29)分,转归良好组为(20.32±4.20)s、(180.1±83.7)μmol/L、(5.06±1.97)×10^(9)/L、2.85±1.67、(8.03±1.09)分,差异有统计学意义(P<0.05)。NLR及AARC-ACLF评分偏高均为HBV相关ACLF患者病情转归不佳的影响因素(P<0.05);血清NLR、AARC-ACLF评分、NLR联合AARC-ACLF评分预测HBV相关ACLF患者预后的AUC分别为0.878、0.892、0.943。结论HBV相关ACLF患者的血清NLR及AARC-ACLF评分均较高,对该病的短期预后具有一定的临床预测价值,且两者联合预测效能更高。

SII和MHR对Stanford B型主动脉夹层患者TEVAR术后发生院内MACE的预测价值

目的:探讨全身免疫炎症指数(SII)和单核细胞/高密度脂蛋白胆固醇比值(MHR)对Stanford B型主动脉夹层(TBAD)胸主动脉血管修复术(TEVAR术)后发生院内主要不良心血管事件(MACE)的预测价值。方法:回顾性分析2019-06-2023-06于孝感市中心医院接受TEVAR术治疗的145例TBAD患者的临床资料。根据患者院内MACE发生情况,将患者分成MACE组(n=30)和非MACE组(n=115)。比较两组患者的临床资料,采用Logistic回归分析TBAD患者TEVAR术后发生院内MACE的危险因素,采用ROC曲线评估SII和MHR对TBAD患者TEVAR术后发生院内MACE的预测价值。结果:与非MACE组相比,MACE组入院白细胞计数、MHR、SII、TC/HDL升高,高密度脂蛋白胆固醇(HDL-C)降低,年龄较小(P<0.05);多因素Logistic回归分析结果显示,较高水平的SII和MHR是TBAD患者TEVAR术后发生院内MACE的危险因素(P<0.05)。ROC曲线分析结果显示,SII和MHR均对TBAD患者TEVAR术后发生院内MACE具有预测价值(P<0.05),SII灵敏度为43.3%,特异度为84.3%,AUC为0.669(95%CI 0.558-0.780,P<0.05);MHR灵敏度为76.7%,特异度为57.4%,AUC为0.703(95%CI 0.640-0.797,P<0.05);两者联合预测时灵敏度、特异度分别为83.3%、61.7%,AUC为0.766(95%CI 0.682-0.849,P<0.01),联合检测预测价值更高。结论:SII、MHR对TBAD患者TEVAR术后院内MACE的发生具有预测价值,且两者联合预测价值更高。

UV-B辐射下叶绿素和微囊藻毒素的协同降解效应研究

[目的]探讨水体微囊藻毒素无二次污染的高效降解方法。[方法]通过开展国内富营养化水体中常见的藻毒素异构体MC-RR、MC-LR在叶绿素的添加与否条件下,研究UV-B对富营养化水体中叶绿素和微囊藻毒素的协同降解效应。[结果]2 mW/cm^(2)的UV-B照射1 h,MC-RR、MC-LR降解率分别为29.8%和16.9%,而添加叶绿素后MC-RR、MC-LR的降解率分别高达99.8%和100.0%;2 mW/cm^(2)的UV-B照射2 h,MC-RR、MC-LR均产生大量的光降解异构体产物,异构体产物与残余MC的色谱面积比分别为28.9%和21.7%,而添加叶绿素后MC-RR、MC-LR均被完全降解,MC和异构体产物均未检出。添加叶绿素后MC呈现出高效完全光降解,避免了常规光降解产生大量潜在毒性的异构体产物的缺点;2 mW/cm^(2)的UV-B照射1 h,对Chla、Chla与MC-RR混合溶液、Chla与MC-LR混合溶液中的叶绿素a的降解率分别为86.7%、18.9%和70.3%。[结论]叶绿素能高效催化UV-B对微囊藻毒素的光降解;水体添加叶绿素后MC呈现高效完全光降解,避免了常规光降解产生大量潜在毒性的异构体产物的缺点;微囊藻毒素的添加延缓了UV-B对叶绿素的光降解,值得进一步深入研究。