Hormesis has emerged as a more common and fundamental dose-response model than the threshold or linear-no-threshold(LNT) models

在回顾传统的有阈和线性无阈的剂量-反应关系的基础上,分析此类该模型被毒理学领域认同的主要原因和其在预测低剂量效应中的缺陷,进而提出了高剂量接触呈现抑制效应,而低剂量却呈现促进或刺激作用这一全面的激效兴奋性剂量-反应关系,弥补了现有模型的不足,并充分论证这种激效性剂量-反应关系在不同种属、接触因素和生物学终点中的普遍性,并探讨了不同物质的激效兴奋作用的可能机制以及激效兴奋模型的三大优点,最后提出了激效模型谋求广泛接受的现实困难和发展趋势。

How to conduct an acupuncture dose–effect relationship study? A discussion based on study methodology

Acupuncture therapy is widely used in the clinic,and its therapeutic effects have been proven by numerous studies.The dose–effect relationship of acupuncture is a fundamental aspect of the acupuncture research system.Recent studies found that different acupuncture dosages altered study results directly,indicating the importance of screening the optimal stimulation dosage.However,the system for studying the acupuncture dose–effect relationship is still in its infancy,and the methodology of the system needs to be improved.This review aimed to define the factors impacting acupuncture“dosage”and“effect,”and to improve the methodological system for research on the dose–effect relationship of acupuncture.By summarizing the current findings of acupuncture dose–effect studies,we discussed the vital acupuncture parameters and methodological problems that influence the relationship between acupuncture dosage and its effects.These factors consist of specific influencing factors(acupoint selection,acupuncture manipulation parameters,de qi response)and nonspecific influencing factors(comparison selection,blinding procedure,patient expectancy).Our perspectives offer suggestions for the design of acupuncture dosage–effect trials.Further studies need to be conducted to establish the methodological system and provide systematic evidence of the acupuncture dose–effect relationship.

EFFECT OF IRRADIATION TEMPERATURE ON GENERAL EQUATION OF SOL FRACTION-DOSE RELATIONSHIP FOR FLUOROPOLYMERS

In this paper, the effect of irradiation temperature on sol fraction-dose relationship of tluoropolymers was studied. It was found that the increasing of irradiation temperature can result in the decreasing of β value of fluoropolymer, which increases the crosslinking probability of fluoropolymer. The relationship between crosslinking parameter β and irradiation temperature (T_i)of fluoropolymer is established as follows:β=2.2×10^(-3) T_g+4×10^(-4)(T_g-T_i)+0.206.values of some tluoropolymers calculated from the above expression are in agreement with the experimental values.

Primary investigation of dose-effect relationship of ^(153)Sm-EDTMP in treating multiple bone metastases

Objective:To calculate the focus absorption dose of 153Sm-EDTMP with the Monte Carlo(MC)EGS4 method for treatment of bone metastases from nasopharyngeal carcinoma or breast cancer,and investigate the relationship between the focus absorption dose and painkilling effect of 153Sm-EDTMP.Methods:Four patients with multiple bone metastases from nasopharyngeal or breast carcinoma and suffered from grade IV bone pain were treated with radionuclide internal irradiation of 153Sm-EDTMP.The absorption dose and dose distribution of bone metastases and other targeted organs were calculated with MC EGS4 program based on the time-order SPECT/CT scanning and the measurement of the radioactivity in the urine accumulation.The release of bone pain and the improvement of life quality were observed.Results:Bone pain of the patients was significantly alleviated to grade II for 3–4 weeks after internal 153Sm-EDTMP irradiation.The 3-dimensional absorption dose distribution image of bone metastases and targeted organs showed that the dose distribution in bone metastases was not asymmetrical.After injection of 0.65×37 MBq/kg 153Sm-EDTMP,the highest absorption dose in bone lesions was about 4.9–5.9 Gy,and the dose in the lesion margin was about 2.0 Gy.Using the highest dose as reference dose point,the relative absorption dose values of bone marrow,vertebra and sex organ near lesions were 0.48–1.1 Gy,0.51–0.85 Gy,and 0.01–0.14 Gy,respectively.Conclusion:The absorption dose of bone metastases is significantly lower than treatment dose of 30 Gy after single irradiation of 153Sm-EDTMP.The painkilling effect is limited and in accordance with clinical observation.

拉考沙胺国外儿童群体药动学模型外部验证和精准用药

目的采用真实世界收集的病例数据验证国外报道的拉考沙胺儿童群体药动学(PPK)模型的预测性能,同时分析暴露-效应关系并模拟优化给药方案。方法收集64例年龄4~13.42岁癫痫患儿口服拉考沙胺达稳态后的血药浓度数据和临床资料,通过拟合优度图和直观预测检验考察国外模型的预测准确性。分析拉考沙胺给药日剂量或谷浓度与临床疗效的关系,并基于药动学参数采用蒙特卡罗模拟评价和筛选拉考沙胺用于不同体质量分层及联合用药情况下最佳给药剂量方案。结果外部验证结果显示国外儿童PPK模型的预测准确性较好。基于模型采用贝叶斯法得到拉考沙胺单药治疗癫痫儿童的药动学参数分别为:吸收速率常数(k a)=(2.43±0.04)h^(-1),表观分布容积(V d/F)=(22.69±6.00)L,清除率(CL/F)=(1.25±0.27)L·h^(-1),半衰期(t 1/2)=(12.74±2.40)h。临床有效病例日剂量5%~95%分位数分布区间为2.5~6.3 mg·kg^(-1)·d^(-1),谷浓度5%~95%分位数分布区间为1.9~6.7 mg·L^(-1)。模拟结果显示,按该研究推荐的拉考沙胺优化给药方案可提高药物浓度的达标概率,保障治疗的有效性和耐受性。结论该研究验证了拉考沙胺国外儿童PPK模型的预测性能,并基于此模型模拟了优化给药方案,可为临床医生个体化合理用药提供参考。

呼吸科患者并发症与合并症指数和护理工作量的剂量-反应关系研究

目的分析呼吸科住院患者护理工作量的影响因素,探究呼吸科住院患者护理工作量和并发症与合并症指数(Complication and Comorbidity Index,CCI)的剂量-反应关系,为临床患者管理及护理人力资源配置提供参考。方法选取呼吸内科1121例住院患者作为研究对象,以病案回顾法,根据医院信息系统电子病历和护理执行单获取患者住院期间每天的护理项目及执行频次,计算护理总工时,通过多元线性回归分析护理工作量的影响因素,采用限制性立方样条探究CCI与护理工作量之间的剂量-反应关系。结果回归分析结果显示,患者年龄、入院途径、住院次数、CCI、呼吸机使用、抗生素使用是护理工作量的影响因素(均P<0.05)。限制性立方样条结果显示,CCI与护理工作量之间存在剂量-反应关系(P_(总体趋势)<0.05,P_(非线性)<0.05),当CCI>0.066时,护理工作量随着CCI的增长不断增大,根据不同年龄段、入院途径、住院次数及是否使用呼吸机和抗生素进行分组探究显示,不同临床特征患者护理工作量间存在差异(均P<0.05)。结论CCI和护理工作量之间存在剂量-反应关系,是呼吸科患者住院期间护理工作量的有效预测因子。建议护理管理者结合患者CCI和其他临床特征科学地进行护理人力资源配置,提高护理人力资源利用效率。

稳定期COPD患者肺功能与DOSE指数及6MWT相关性研究

目的通过观察和评价稳定期COPD患者的病情演变,探讨稳定期COPD患者DOSE指数和6MWT之间的相关关系。方法 2014年6月至2016年6月我社区对稳定期COPD患者进行肺功能检查,记录6 min步行距离和DOSE指数,采用Person相关分析和Spearman相关分析评估它们之间的相关性。结果完成观察的59例稳定期患者DOSE指数与FEV1%pre评分呈正相关(r=0.518,P<0.001);DOSE指数与6MWT评分呈正相关(r=0.663,P<0.001);6MWT与FEV1%pre测量值呈正相关(r=0.654,P<0.001)。结论稳定期COPD患者6MWT与DOSE指数有良好的相关关系,两者结合可客观评价COPD患者的运动耐力和疾病严重程度,在COPD的临床管理工作中有一定的应用价值,值得临床推广。

空间措施干预疾病流行:融合公共卫生学原理的空间机制分析框架与预防途径

围绕近年来突显的城市疾病问题,既往研究主要聚焦于蓝绿空间的健康效益促进,而较少关注空间因素对于疾病扩散流行的阻断过程与干预途径,致使城市疾病问题的空间管控收效不佳。因此,通过梳理公共卫生学理论与风景园林实践的交叉融贯发展历程,基于公共卫生学“剂量-反应”关系原理提出“空间干预-环境因素-致病因素-疾病反应”的空间机制分析框架,形成融合公共卫生学原理的空间干预模式,构建公共卫生学理论研究向风景园林设计实践的转化途径。通过结合大气环境、水体环境、城市居住环境三类情境中城市疾病问题的空间机制框架应用解析,从空间角度分析城市疾病问题并给予解决策略,进一步展示空间机制框架在症疾生物传染病实际案例中的应用可行性。强调空间干预途径介人疾病初级流行阶段的重要性,旨在促进规划设计措施对城市疾病问题的有效管控,意为当前城市蓝绿空间规划与更新提供不同视角,以期提升后疫情时代健康城市的综合效益。

The ED_(50)of Remazolam Toluenesulfonate Combined with a Subthreshold Dose of Esketamine for Inhibiting Cardiovascular Response to Tracheal Intubation in Elderly Patients

Objective:To explore the half-effective dose(ED_(50))of remazolam toluenesulfonate combined with subthreshold amounts of esketamine for inhibiting cardiovascular response to tracheal intubation in elderly patients.Method:We included 42 patients,aged 65-75,who required general anesthesia and single-lumen endotracheal intubation for elective surgery.The first patient was administered remazolam toluenesulfonate at a dose of 0.20 mg/kg.Once the patient lost consciousness,their alertness/sedation score(OAA/S score)was≤1,and their BIS score was≤60,and a subthreshold dose(0.3 mg/kg)of esketamine was given.The subsequent doses were adjusted using a sequential approach based on the cardiovascular response to tracheal intubation observed in the previous patient.The dose was modified in increments or decrements of 0.01 mg/kg.The ED_(50)and 95%CI of remazolam toluenesulfonate were calculated using the Dixon and Massey sequential distribution test method.Result:The inhibition of endotracheal intubation response was positively correlated with the dose of remazolam toluenesulfonate,and the depth of sedation could not be achieved when the amount was≤0.22 mg/kg.The ED_(50)of remazolam toluenesulfonate combined with a subthreshold dose of esketamine in inhibiting cardiovascular response to tracheal intubation in elderly patients was 0.30(0.28,0.33)mg/kg.There was no statistically significant difference in blood pressure between the induction of anesthesia and before the operation.Conclusion:When compounded with 0.3 mg/kg esketamine,the ED_(50)of Remazolam toluenesulfonate in inhibiting cardiovascular response to endotracheal intubation in elderly patients was 0.30 mg/kg(95%CI0.28-0.33 mg/kg).

DOSE RESPONSE CURVE OF ^（60）Co FOR PREMATURE CONDENSED CHROMOSOME FRAGMENTS OF HUMAN LYMPHOCYTES

The dose-response curves obtained by premature condensed chromosome (PCC)and conventional cellular genetic methods can be represented by two linear equations. The ratiO of the slopes, Kpcc/KM,, is about 28. In comparison to the conventional method, the PCC method has many advantages; e,g. it is faster, simpler, more sensitive and accurate. Its significance in the study of radiation damage is also discussed.

Quantitative structure-activity relationships of selected phenols with non-monotonic dose-response curves

Particular non-monotonic dose-response curves of many endocrine disrupting chemicals (EDCs) suggest the existence of diverse toxicity mechanisms at different dose levels. As a result, the biological activities of EDCs cannot be simply exhibited by unique EC50/LD50 values, and the quantitative structure-activity relationship (QSAR) analysis for non-monotonic dose-response relationship becomes an unknown field in the environmental science. In this paper, nine phenols with inverted U-shaped dose-response curves in lymphocyte proliferation test of Carassius auratus were selected. The binding interactions between the phenols and several typical EDCs-related receptors were then explored in a molecular simulation study. The estrogen receptor (ER), androgen receptor (AR), thyroid hormone receptor (TR), bacterial O2 sensing FixL protein (FixL), aryl hydrocarbon receptor (AhR), and the peroxisome proliferator-activated receptor (PPAR) were the target receptors in the study. Linear regression QSAR models for the low and high exposure levels of the compounds were developed separately. The results indicated that the lymphocyte proliferation in the low-dose range might involve ER–mediated process, while the proliferation inhibition in the high dose range was dominated by the acute toxicity of phenols due to receptor occupancy and cell damage.

Dose-dependent effects of pentabrominated diphenyl ethers on sexual hormone and histology of male reproductive system in rats

Polybrominated diphenyl ethers (PBDEs) used as flame retardants are widely used in a variety of consumer products, like textiles, foam and building materials. They are persistent in the environment, and increasing levels of PBDEs have been found both biota and human tissue samples. In the present study we examined the dose-dependent effects of pentabrominated diphenyl ether (PBDE-99) on the serum hormone and histology of reproductive system in male rats. 40 health 4-week-old SD rats were divided into 4 groups randomly. The treated rats were orally administered with BDE-99 at the dose of 60,120 or 180 mg/kg, while controls received equal volume of corn oil. We examined the changes of serum hormone levels, histopathology, and PCNA after 30 days exposure to BDE-99. With increasing doses of BDE-99, testis organ coefficient increased, serum hormone levels lower, PCNA positive expression reduced, and the degeneration of seminiferous epithelium were revealed in treated group. These indicators with significant dose-effect relationship showed that BDE-99 can reduce the serum sex hormone levels and cause severe degeneration of seminiferous epithelium.

壳三糖对帕金森病小鼠氧化应激的影响

帕金森病(Parkinson′s disease,PD)的重要发病机制之一是氧化应激,而壳寡糖具有较好的抗氧化活性且在PD等神经性疾病中具有良好的保护效果。将小鼠分为空白组、模型组、低剂量组(35 mg/kg)、中剂量组(70 mg/kg)和高剂量组(140 mg/kg),利用1-甲基-4-苯基-1,2,3,6-四氢吡啶(1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine,MPTP)对小鼠腹腔注射诱导PD模型,并通过行为学、病理指标和氧化应激相关指标对各组小鼠进行评估,探究了壳三糖对于PD小鼠保护效果的量效关系及保护机制。结果显示,低中高3个剂量组壳三糖均能缓解PD小鼠的行为学障碍和纹状体中酪氨酸羟化酶(tyrosine hydroxylase,TH)表达量的减少,且中剂量组效果最佳。壳三糖干预显著降低了PD小鼠纹状体中丙二醛(malondialdehyde,MDA)含量,提高了还原型谷胱甘肽(glutathione,GSH)含量、总抗氧化能力(total antioxidant capacity,T-AOC)以及过氧化氢酶(catalase,CAT)、超氧化物歧化酶(superoxide dismutase,SOD)的表达,上调了核因子E2相关因子(NF-E2-related factor 2,Nrf2)/血红素氧化酶(heme oxygenase,HO-1)信号通路。结果表明,中剂量壳三糖对MPTP诱导的PD有更明显的缓解作用,其作用机制可能是通过提高抗氧化酶表达和上调Nrf2/HO-1信号通路,降低PD小鼠氧化应激从而缓解PD。

乳酸对电加热卷烟气溶胶不同形态烟碱释放规律的影响

【目的】探索调控加热卷烟劲头与刺激之间平衡的方法,提高加热卷烟感官舒适度。【方法】基于二氯甲烷-水双相萃取体系的加热卷烟游离态烟碱测定方法,考察了乙酸、丙酸及乳酸3种酸类香料对电加热卷烟不同形态烟碱释放规律的影响。【结果】①乳酸最能影响气溶胶中游离态烟碱释放量。②除烟芯材料总烟碱外,烟芯材料pH值、游离态烟碱含量、游离态烟碱系数以及气溶胶pH值、游离态烟碱释放量、总烟碱释放量、烟碱转移率均呈现随乳酸增加而降低趋势。③乳酸施加量与烟芯材料、气溶胶关键指标之间存在较强的线性量效关系。④随抽吸口序的递增,气溶胶游离态烟碱系数整体呈可识别的下降趋势,前6口下降趋势更为明显,表明游离态烟碱更倾向于在抽吸前6口释放出来。【结论】可通过乳酸对气溶胶总烟碱及游离态烟碱释放进行定量控制,使加热卷烟在劲头与刺激之间取得平衡,改善高烟碱释放量加热卷烟的感官舒适度。

慢性肾脏病患者钾摄入量与死亡率及肾脏病进展的剂量-反应Meta分析

目的系统评价慢性肾脏病(chronic kidney disease,CKD)患者的钾摄入量与死亡率及肾脏病进展的剂量-反应关系。方法计算机检索PubMed、The Cochrane Library、EMbase、Web of Science、CNKI、WanFang Data、VIP和CBM数据库,检索关于CKD患者钾摄入量与死亡率、肾脏病进展的研究,检索时限均从建库至2023年8月31日。由2名研究者独立筛选文献、提取资料并评价纳入研究的偏倚风险后,采用R 4.2软件进行Meta分析,采用限制性立方样条函数和广义最小二乘估计方法进行剂量-反应Meta分析。结果共纳入14项队列研究,包括53694例患者。线性Meta分析结果显示:钾摄入量与CKD患者死亡风险无显著相关(RR=0.875,95%CI:0.746~1.027,P=0.100)。剂量-反应分析结果显示:CKD患者钾摄入量与全因死亡率之间存在L型非线性关系(非线性检验P=0.010);钾摄入量与CKD进展无明显的非线性趋势(非线性检验P=0.226),线性趋势结果显示CKD患者钾摄入量每增加一个单位,CKD进展风险降低21.6%(RR=0.784,95%CI:0.625~0.983,P=0.031)。结论当前证据表明过低的钾摄入量不利于降低CKD患者的死亡与肾脏病进展的风险。受纳入研究数量和质量的限制,上述结论尚待更多高质量研究予以验证。

步行如何影响老年女性衰弱状态:步数还是步行强度?

目的探究步数、步行强度以及有氧步数与老年女性衰弱间的剂量-效应关系。方法采用ActiGraph三轴加速度计测量1099名60~70岁老年女性每日步数、步行强度(峰值1 min步数和峰值30 min步数)及有氧步数(以≥60步/min的步频连续行走≥10 min的步数)。根据衰弱表型评估老年女性衰弱状态,使用Logistic回归和限制性立方样条曲线分析步数、步行强度及有氧步数与衰弱的关联。结果控制混杂因素后,步行强度与老年女性衰弱前期显著相关,有氧步数与衰弱存在非线性关系。随着有氧步数的增加,衰弱患病率逐渐下降,当有氧步数达到4000步时,下降幅度趋于平缓。结论有氧步数而非总步数与衰弱间存在剂量-效应关系,每日有氧步数达到约4000步时,可能对老年女性衰弱的改善效果最佳。

红外热成像评价针药结合治疗中枢性面瘫临床效果及量效分析

目的:分析红外热成像评价针药结合治疗中枢性面瘫的临床效果以及量效关系。方法:选取2023年3月至2024年5月到广州市第十二人民医院和南部战区空军医院诊治的中枢性面瘫150例患者,按随机数表分为6组,每组25例患者。A组:频率为16次/min电针联合60 g黄芪补阳还五汤;B组:频率为22次/min电针联合60g黄芪补阳还五汤;C组:频率为26次/min电针联合60g补阳还五汤;D组:频率为16次/min电针联合120 g黄芪补阳还五汤;E组:频率为22次/min电针联合120 g黄芪补阳还五汤;F组:频率为26次/min电针联合120 g黄芪补阳还五汤。对比6组疗效。结果:治疗后,6组患者鼻唇沟、口角静态评分均较治疗前明显下降(P<0.05);A组治疗后鼻唇沟、口角静态评分最高,其次为B组,C、D、E、F组较低(P<0.05)。6组患者张嘴微笑、耸鼻、唇吸吮随意运动评分均较治疗前明显升高(P<0.05),组间比较,A组评分最低,其次为B、C、D组,再次为E、F组(P<0.05)。治疗后,口角区温度比较,A、B组较低,C、D、E、F组较高(P<0.05);眼周区温度比较,A、B组较低,C、D、E、F组较高(P<0.05);额周区温度比较,A、B组较低,其次为C、D、F组,E组较高(P<0.05);颧周区温度比较,A、B组较低,其次为C、D组,E、F组较高(P<0.05)。结论:对于不同表现的中枢性面瘫患者,可采用相应剂量黄芪补阳还五汤及电针强度治疗即可取得较为理想的效果。红外热成像评价针药结合治疗中枢性面瘫的临床效果好,能改善患者面部微循环,提高生活能力,改善预后。

针刺量效关系研究进展

针刺量效关系研究旨在于阐述针刺量与针刺效的核心内涵,明晰针刺量中刺激量与接受量的分类以及不同刺激量的量化和规范方法;进而分析针刺量效关系的影响因素,研究单一因素与综合因素在同一疾病或不同疾病的最佳刺激参数,从而以疾病和穴位为基础探求针刺量效关系的核心规律,以获取针刺量效关系的更优刺激参数,优化疾病的临床针刺方案,从而稳定针刺的疗效。如今在医工结合的背景下,随着诸多新技术的引入,研究人员逐渐开展针刺量效关系的转化研究,聚焦于针刺量的数据采集和仪器仿真,以获取针刺量更精准的数据参数同时进行仿真输出以获得最佳针刺效,这有效的提高针刺操作的可重复性,对针刺的临床应用、传承、推广和研究都具有重要得作用。然而在针刺量效关系研究中还存在如:接受量的量化情况不佳、数据采集与仿真仪器不统一、量化形式不同以及缺乏确切的针刺量效关系中医评价标准等亟待解决的问题,所以本文对上述问题提出了解决方案和未来的研究方向。

补阳还五汤11种成分的药物动力学与谱动学关系研究

目的阐明中药复方药物动力学与谱动学总量统计矩的数学模型与参数关系,示范性地用补阳还五汤中11种成分进行药物动力学与谱动学研究,探讨其量-时关系,包括代谢时间和色谱保留时间关系。方法采用HPLC/MS法测定补阳还五汤中黄芪甲苷等11种成分的药物浓度,并根据已建立的中药药物动力学与谱动学的总量统计矩数学模型,计算药物动力学与谱动学参数。结果补阳还五汤中11种成分的药物动力学总量统计矩参数分别为AUCT为432.9 ng·h·m L^(-1),MRTT为2.185 h,VRTT为5.259 h2;CLT为82.95 m L·h^(-1);VT为139.9 m L;95%的代谢时间区间为[0,6.680]h。谱动学的VUCT为457.5 ng·h·min·m L^(-1);MCRTT为5.625 min;VCRTT为7.949 min2,95%的时间区间为[0.09898,11.15]min。各取样点的谱动学总量零、一、二阶矩的RSD分别为86.09%、2.299%、7.587%,相似度基本上都在0.875以上。结论中药药物动力学与谱动学总量统计矩法能表征多成分代谢的量-时关系,其中谱动学还能表征所测定代谢成分的构成比的变化和色谱学特征,可为临床合理用药奠定理论与实验研究基础。

血清γ⁃氨基丁酸、氧化应激与血脂异常的剂量⁃反应关系研究

目的:探讨γ‑氨基丁酸(GABA)、氧化应激指标与血脂异常患病风险的剂量‑反应关系,为预防及改善血脂异常提供参考依据。方法:选择2022年8月~2023年8月于海口市某三甲医院住院的149例血脂异常者为病例组,236例血脂正常者为对照组,通过问卷收集研究对象的基本情况,试剂盒测血清GABA水平、超氧化物歧化酶(SOD)活性、谷胱甘肽过氧化物酶(GSH‑Px)活性和丙二醛(MDA)水平。将GABA和氧化应激指标(SOD、GSH‑Px、MDA)按对照组四分位水平从低到高分为4组(Q1组~Q4组),Logistic回归分析血脂异常的患病风险;Spearman相关系数、广义线性模型和限制性立方样条分析GABA与氧化应激指标的相关性,GABA、氧化应激指标与血脂异常的剂量‑反应关系。结果:调整混杂因素后,Logistic回归显示:与Q1组SOD活性、GSH‑Px活性和MDA水平相比,Q4组血脂异常患病风险分别为OR=0.537[95%CI(0.294~0.980)]、OR=0.400[95%CI(0.213~0.750)]和OR=2.375[95%CI(1.254~4.495)](P<0.05)。GABA水平与SOD、GSH‑Px活性呈正相关,与MDA水平呈负相关(P<0.001)。广义线性模型和限制性立方样条显示:血脂异常患病风险随SOD、GSH‑Px活性增加而降低,随MDA水平增加而上升,为线性剂量‑反应关系(P<0.05)。结论:GABA水平与SOD活性、GSH‑Px活性、MDA水平存在相关性,SOD活性、GSH‑Px活性、MDA水平与血脂异常患病风险存在线性剂量‑反应关系。