Study on the Difference of Body Mass Index and Insulin Sensitivity Index in Salt-sensitive Hypertension Patients of Different Traditional Chinese Medicine Syndrome Types

OBJECTIVE: To explore the difference of body mass index(BMI) and insulin sensitivity index(ISI) in saltsensitive hypertension patients of different traditional Chinese medicine(TCM) syndrome types, so as to elucidate the effect of the distribution of each syndrome on the degree of insulin resistance in salt-sensitive hypertension patients. METHODS: A total of 131 patients with salt-sensitive hypertension were included in the study. Factor analysis and cluster analysis were used to study the characteristics of TCM viscera, syndrome elements and syndrome differentiation. Furthermore, the following parameters were observed and corresponding differences were analyzed, including BMI, waist circumference, abdominal circumference, neck circumference and insulin sensitivity index among group s of different TCM syndrome types. RESULTS: There were 131 cases of saltsensitive hypertension. The results of factor analysis showed that the total variance contribution of F1-5 common factors was 75.8%. According to the pattern differentiation of zang-fu organs, a basic theory of traditional Chinese medicine(TCM), the main zang-fu organs involved in the five common factors are: liver, spleen, and kidney.The main syndrome factors that had been extracted include yin de?ciency, ?re, qi stagnation, yang hyperactivity,dampness, phlegm, qi reversal, heat, retained fluid, essence deficiency, qi descending, qi deficiency, and yang deficiency. Among them, factor 1 accounted for 18.32%, factor 2 accounted for 21.37%, factor 3 accounted for20.43%, factor 4 accounted for 20.61%, and factor 5 accounted for 22.14%. The proportion of zang-fu organs involvement was: 21.37% of the spleen, 17.56% of the kidney, 18.32% of the liver and spleen, and 42.75% of the spleen and kidney. Syndrome elements: yin de?ciency 18.32%, phlegm-dampness 21.37%, qi stagnation 39.69%, qi de?ciency 42.75%, retained ?uid 20.61%, yang de?ciency 60.31%, essence de?ciency 17.56%, qi sinking 17.56%,heat 21.37%, qi reversal 21.37%. Results of cluster analysis: there were 3 categories when the distance variance was 20-Category 1: Factor 1; Category 2: Factor 2; Category 3: Factor 3, Factor 4, Factor 5. Combined with the clinical practice of TCM, the classi?cation based on TCM syndromes was:Category 1, yin de?ciency and yang hyperactivity pattern(accounting for 18.32%); Category 2, excessive accumulation of phlegm-dampness(accounting for 21.37%); Category 3, spleen-kidney yang de?ciency and pattern of water-rheum collecting internally(accounting for 60.31%), including 24 cases of yin-de?ciency and yang-hyperactivity(YDYH), 28 cases of excessive phlegmdampness syndrome(EPDS), 79 cases of spleen and kidney yang-de?ciency and ?uid retention stagnating in the interior(SKFR). There was no difference in the distribution of age and sex among groups. In addition, no signi?cant difference was found regarding BMI, waist circumference, abdominal circumference, neck circumference among groups of salt-sensitive hypertension of different TCM syndrome types. Meanwhile, ISI was signi?cantly lower in cases of spleen and kidney yang-de?ciency and ?uid retention stagnating in the interior than in the other 2 groups,with statistical difference. CONCLUSION: Insulin resistance is the most serious in salt-sensitive hypertension patients with spleen and kidney yang-de?ciency and ?uid retention stagnating in the interior. Besides, obesity is not a critical factor in determining the distribution of TCM syndrome types in patients with salt-sensitive hypertension.

SUPPRESSION OF ANGⅡ AFTER ACUTE SALINE LOAD ASSOCIATED WITH THE CHANGES OF PLASMA ANP AND SODIUM METABOLISM IN SALT-SENSITIVE HYPERTENSION PATIENTS

Objective To observe the changes of plasma AngⅡ,ANP and their relationship with urine sodium excretion in salt sensitive hypertension. Methods The salt sensitivity was determined by acute saline loading test in 173 primary hypertensives of Stage Ⅰ or Stage Ⅱ. Plasma AngⅡand ANP was determined by radioimmunoassay. Results After acute salt load, AngⅡ was suppressed inadequately. The plasma ANP secretion was not increased. The urine sodiun excretion was delayed, Na + in RBC was increased in salt sensitive subjects. The plasma ANP was decreased in the salt sensitive subjects without AngⅡ suppressed. The 24 hours urine sodium excretion was lower than those AngⅡ suppressed.Conclusion The changes of plasma RAS are not homogeneous after salt load. Those without the plasma AngⅡ suppressed have more severe sodium metabolism abnormalities and the endogenous ANP secretion is impaired in salt sensitive patients.

RENAL ENDOGENOUS ET-1 AND URINARY SODIUM EXCRETION AND MICROALBUMINURIA IN HUMAN SALT-SENSITIVE HYPERTENSION

Objective To investigate the urinary endothelin-1 (ET-l ) excretion and urinary sodium excretion, microalbuminuria and ambulatory blood pressure(ABP) in salt-sensitive(SS) hypertension patients. Methods Twen- ty-one cases of normotensive subjects and 32 cases of uncomplicated hypertensive patients were recruited in this study. Salt sensitivity was determined by acute venous saline loading test. Before saline loading, 24-hour ABP mea- surements were performed. Urine samples were collected to assay ET-1,urinary sodium excretion and urinary albumin excretion(UAF). Results Compared to slat-resistant(SR) subgroup, SS showed low urinary ET-1 excretion in nor- motensive group (P<0.05) or hypertensive group (P<0.01),regardless or saline loading or not. The nighttime MAP of SS was higher than SR subgroup in normotensive or hypertensive group. Urinary sodium excretion during 4h of saline loading was significantly lower in SS than that in SR hypertensive patients (P<0.05). Twenty-four-hour UAE of SS patients was higher than SR group (P<0.01). Results of further correlation analysis indicated that the urinary ET-1 excretion was positively related to urinary sodium content and negatively to ABP and UAE. Conclusion Uri- nary ET-1 is low in SS normotensives or hypertension patients,which may play a role in renal sodium retention and renal impairment or SS hypertension patients.

PHOTOPOLYMERIZATION INITIATED BY DIMETHYLAMINOCHALCONE/DIPHENYLIODONIUM SALT COMBINATION SYSTEM SENSITIVE TO VISIBLE LIGHT

Several dimethylamino-substituted chalcone (i .e. dimethylaminobenzal acetophenone) (DBA) derivatives with intramolecular charge transfer transition character were used as visible light sensitizers for radical photopolymerization initiated by iodonium salt (DPIO). Initiating radical species is produced from DBA sensitized photolysis of DPIO through the single electron transfer, accompanying the bleaching of DBA, The activity of DBA decreases as a function of substituent attached to phenyl ring in the order: DBA-2 (OCH_3) >DBA-1(H)> DBA-3 (Cl). The kinetic study on photopolymerization of MMA was carried out in CH_3CN solution at 30 ℃ by dilatometry. The polymerization rate was determined to be proportional to the concentration with exponents of 0.42, 0.25 and 0.86 for DPIO, DBA-1 and MMA, respectively.

BLOOD PRESSURE CHANGE WITH AGE IN SALT-SENSITIVE TEENAGERS

Objective To observe blood pressure change with age in salt-sensitive teenagers whose salt sensitivity were determined by repeated testing. Methods Salt sensitivity was determined through intravenous infusion of normal saline combined with volume-depletion by oral diuretic furosemide in 55 teenagers. After five years, salt sensitivity was re-examined and subject blood pressure was followed up. Blood pressure changes in salt-sensitive teenagers were compared to that of non-salt sensitive teenagers over five years. Results After 5 years, the repetition rate of salt sensitivity determined by intravenous saline loading is 92.7%. In teena-gers with salt sensitivity on the baseline, both the systolic blood pressure increments and increment rates were much higher than non-salt sensitive teenagers (12.7±12.1 mmHg vs. 2.8 ±5.2 mmHg, P< 0.01; 12.2% ±12.0% vs. 2.5% ±4.4%, P< 0.001, respectively). There was a similar trend for diastolic blood pressure (8.4 ±6.4 mmHg vs. 3.7 ±6.4 mmHg, P= 0.052; 13.2% ±10.6 % vs. 6.8% ±10.1%, P= 0.053, respectively). Conclusions Salt sensitivity determined by intravenous saline loading showed good reproducibility. Blood pressure increments with age were much higher in salt-sensitive teenagers than non-salt sensitive teenagers, especially in terms of systolic blood pressure.

How far cardio metabolic and psychological factors affect salt sensitivity in normotensive adult population?

AIM To evaluate the prevalence of salt sensitivity and the impact of cardiometabolic and psychological characteristics on salt sensitivity in normotensive population. METHODS Of all participants,anthropometric measurements and fasting venous blood samples were collected,and study questionnaires were completed. Salt Sensitivity was defined based on the difference in mean arterial pressure with infusion of 2 L of normal saline followed by a low sodium diet and administration of three dosesof oral furosemide the day after. RESULTS Of 131 participants,56(42.7%) were diagnosed with salt sensitivity. Crude and age and sex adjusted regression analysis showed that low-density lipoprotein cholesterol and depression were positively associated with salt sensitivity(OR = 1.02,95%CI: 1.01-1.04 and OR = 1.15,95%CI: 1.00-1.34,respectively). CONCLUSION The high prevalence of salt sensitivity and its significant relation with prevalent risk factors necessitates considering its reduction actions at the population level and the need for further research.

Low Salt Diet in Pregnant Mothers Is Associated with Enhanced Salt Appetite in Their Offspring of Dahl Salt-Sensitive Rats

Objectives: We investigated an influence of salt intake during gestation or lactation in salt preference of weaning Dahl salt sensitive (Dahl S) strain. Material and Methods: Nine-week-old female Dahl S rats, after mated with the male, were divided into 1) high-salt group fed a 4% NaCl diet (high-salt mother) or 2) low-salt group fed a 0.3% NaCl diet (low-salt mother) during gestation or lactation periods. Using 0.4%, 0.6% and 0.8% (w/v) saline solutions, we assessed salt preference in their offspring after weaning. Systolic blood pressure (SBP) was determined by tail cuff method. Results: Both the male and female offspring from low-salt mothers during gestation consumed equal amounts of any saline solution. However, the amount of each saline solution was higher in the offspring of low-salt mothers than those of high-salt mothers. This resulted in a significant increase of salt intake in both the male and female offspring of low-salt mothers compared with those of high-salt mothers. In contrast, both the male and female offspring from low-mothers during lactation rather preferred the lower concentration of saline solution, and this resulted in less salt intake in the offspring of low-salt mothers than those of high-salt mothers. Conclusions: We demonstrated that low salt diet in pregnant mothers increased salt intake of their offspring. The offspring of mothers fed a low salt diet during lactation had less salt than those of high-salt mothers. The influence of salt intake of mothers in their offspring varies along with the growth stage of their babies.

DYE-SENSITIZED PHOTOPOLYMERIZATION OF METHYL METHACRYLATE INITIATED BY COUMARIN DYE/IODONIUM SALT SYSTEM

The photosensitive initiating system composed of 7-diethylamino-3-(2'-benzimidazolyl)coumarin dye (DEDC) and diphenyliodonium hexafluorophosphate (DIHP) which act as the sensitizer and the initiator respectively, can be used to initiate the polymerization of methyl methacrylate (MMA). The results showed that when exposed to visible light, coumarin dye/iodonium salt undergoes quick electron transfer from DEDC to DIHP and free radicals are produced. The visible light photoinduced reaction between DEDC and DIHP is mainly through the excited singlet state of DEDC and thus it is a little sensitive to O-2. The influence of concentration of DEDC, DIHP and MMA on the rate of photopolymerization of MMA was also investigated.

Metabolomics signature of blood pressure salt sensitivity and its link to cardiovascular disease:A dietary salt-intervention trial

Individuals with a high degree of salt sensitivity(SS)have a greater risk of cardiovascular disease(CVD),but whether SS fosters CVD by influencing metabolomics homeostasis remains unclear.This study aimed to reveal the role of the SS-related metabolomics signature in the development of CVDs,based on the MetaSalt study,which was a dietary salt-intervention trial conducted at four centers in China in 2019.A total of 528 participants were recruited and underwent 3 days of baseline observations,a 10-day low-salt intervention,and a 10-day highsalt intervention.Plasma untargeted metabolomics,lipidomics,and BP measurements were scheduled at each stage.Participants were grouped into extreme SS,moderate SS,and salt-resistant(SR)individuals according to their BP responses to salt.Linear mixed models were used to identify SS-related metabolites and determine the relationship between the SS-related metabolomics signature and arterial stiffness.Mendelian randomization(MR)analyses were applied to establish the causal pathways among the SS-related metabolites,BP,and CVDs.Among the 713 metabolites,467 were significantly changed after the high-salt intervention.Among them,the changes in 30 metabolites from the low-salt to the high-salt intervention differed among the SS groups.Of the remaining nonsalt-related metabolites,the baseline levels of 11 metabolites were related to SS.These 41 metabolites explained 23%of the variance in SS.Moreover,SS and its metabolomics signature were positively correlated with arterial stiffness.MR analyses demonstrated that the SS-related metabolites may affect CVD risk by altering BP,indicating that the increase in BP was the consequence of the changes in SS-related metabolites rather than the cause.Our study revealed that the metabolomics signature of SS individuals differs from that of SR individuals and that the changes in SS-related metabolites may increase arterial stiffness and foster CVDs.This study provides insight into understanding the biology and targets of SS and its role in CVDs.

DOCA-Salt高血压大鼠模型的建立

目的建立一种可靠的DOCA-Salt高血压大鼠模型。方法大鼠行左侧肾脏切除术后,每周皮下注射DOCA油剂(30mg·kg-1)一次,饲饮水含有10g·L-1NaCl和2g.L-1KCl,共4wk。每周监测血压和24h尿量;检测大鼠UNaV、UClV、UKV和UCaV及尿液pH值;检测血清中SGPT、CREA、SUGA、TRIG、CHOL水平,血浆中INS、ALD和ADH水平;观察肾脏的形态学变化及测定肾小管上皮细胞Na+,K+-ATPase活性。结果模型组大鼠的尾动脉压和清醒状态血压均升高;大鼠24h尿量、UNaV、UClV增加,而UKV、UCaV和尿液pH值没有变化;血清中SGPT、CREA、SUGA、TRIG、CHOL和血浆中INS、ALD和ADH水平均没有改变;大鼠右肾重量明显增加,形态学改变表现为肾小球硬化、肾小管肥厚等;肾小管上皮细胞Na+,K+-ATPase活性降低。结论皮下注射DOCA和饲饮盐水诱导的大鼠高血压模型具有操作简单、成功率高、易复制、可靠等特点,可用于盐敏感性高血压的研究及抗高血压药物的筛选。

A case-control study on the relationship between salt intake and salty taste and risk of gastric cancer

AIM: To investigate the relationship between salt intake and salty taste and risk of gastric cancer. METHODS: A 1:2 matched hospital based case-control study including 300 patients with gastric cancer and 600 cancer-free subjects as controls. Subjects were interviewed with a structured questionnaire containing 80 items, which elicited information on dietary, lifestyle habits, smoking and drinking histories. Subjects were tested for salt taste sensitivity threshold (STST) usingconcentrated saline solutions (0.22-58.4 g/L). Conditional logistic regression was used to calculate odds ratios (ORs) and 95% confidence intervals (95% CI). RESULTS: Alcohol and tobacco consumption increased the risk of gastric cancer [OR (95% CI) was 2.27 (1.27-4.04) for alcohol and 2.41 (1.51-3.87) for tobacco]. A protective effect was observed in frequent consumption of fresh vegetable and fruit [OR (95% CI) was 0.92 (0.58-0.98) for fresh vegetable and 0.87 (0.67-0.93) for fruit]. Strong association was found between STST ≥ 5 and gastric cancer [OR = 5.71 (3.18-6.72)]. Increased STST score was significantly associated with salted food intake and salty taste preference (P < 0.05). CONCLUSION: A high STST score is strongly associated with gastric cancer risk. STST can be used to evaluate an inherited characteristic of salt preference, and it is a simple index to verify the salt intake in clinic.

Overexpression of a tobacco small G protein gene NtRop1 causes salt sensitivity and hydrogen peroxide production in transgenic plants

The small GTPases of Rop/Rho family is central regulators of important cellular processes in plants. Tobacco small G protein gene NtRop1 has been isolated; however, its roles in stress responses were unknown. In the present study, the genomic sequence of NtRop1 was cloned, which has seven exons and six introns, similar to the Rop gene structure from Arabidopsis. The NtRop1 gene was constitutively expressed in the different organs whereas the other six Rop genes from tobacco had differential expression patterns. The expression of the NtRop1 gene was moderately induced by methyl viologen, NaCl, and ACC treatments, but slightly inhibited by ABA treatment, with no significant induction by NAA treatment. The transgenic Arabidopsis plants overexpressing the NtRop1 showed increased salt sensitivity as can be seen from the reduced root growth and elevated relative electrolyte leakage. The hydrogen peroxide production was also promoted in the NtRop1-trangenic plants in comparison with wild type plants. These results imply that the NtRop1 may confer salt sensitivity through activation of H2O2 production during plant response to salt stress.

Characterization and Mapping of a Salt-Sensitive Mutant in Rice (Oryza sativa L.)

A salt-sensitive mutant designated rice salt sensitive 2 （rss2） was isolated from the M2 generation of the rice cultivar Nipponbare （Oryza sativa L. ssp. japonica） mutagenized with ethyl methanesulfonate （EMS）. This mutant exhibited a greater decrease in salt tolerance with a significant increase in Na＋ content in its shoots. Genetic analysis indicated that the increase in Na＋ in rss2 was controlled by a single recessive gene. Further genome-wide analysis of the linkage map constructed from the F2 population of rss2/Zhaiyeqing 8 （ZYQ8） showed that two quantitative trait loci （QTLs） on chromosomes 1 and 6 were responsible for the Na＋ concentration in shoots, which explained 14.5% and 53.3%, respectively, of the phenotypic variance. The locus on chromosome 1, but not that on chromosome 6, was also detected in the F2 population of Nipponbare/ZYQ8, suggesting that the QTL on chromosome 6 was responsible for the salt sensitivity in rss2. By analyzing the recombination events in 220 mutant individuals of an enlarged mapping population of rss2/ZYQ8, the rss2 locus was precisely mapped to an interval of 605.3 kb between insertion/deletion （InDel） markers IM21962 and IM22567. This finding will facilitate the cloning of the rss2 locus and provide insight into the physiological mechanisms of salt sensitivity in rice.

Humidity Sensitive Properties of a Coplymer of Quaternary Ammonium Salt with Polyether-salt Complex

1 Results Humidity sensors have been widely used in meteorology, process controlling, agriculture and manufacturing. In recent year, more attention has been paid to resistive-type polymeric humidity sensors. Polyelectrolytes are the most usually used materials for their advantages of high sensitivity, fast response, easy preparation, low cost, etc[1,2]. In this paper quaternized and salt-doped copolymer of 2-(dimethylamino) ethylmethacrylate (DMAEMA) with poly(ethylene glycol) methyl ether methacrylate ...

The NMR core analyzing tomograph:a multi-functional tool for non-destructive testing of building materials

NMR is becoming increasingly popular for the investigation of building materials as it is a non-invasive technology that does not require any sample preparation nor causes damage to the material.Depending on the specific application it can offer insights into properties like porosity and spatial saturation degree as well as pore structure.Moreover it enables the determination of moisture transport properties and the(re-)distribution of internal moisture into different reservoirs or chemical phases upon damage and curing.However,as yet most investigations were carried out using devices originally either designed for geophysical applications or the analysis of rather homogeneous small scale(<10 mL)samples.This paper describes the capabilities of an NMR tomograph,which has been specifically optimized for the investigation of larger,heterogeneous building material samples(diameters of up to 72 mm,length of up to 700 mm)with a high flexibility due to interchangeable coils allowing for a high SNR and short echo times(50-80 ms).

芍药苷通过调控PI3K/AKT/mTOR信号通路对盐敏感性高血压大鼠血压和血管内皮功能的影响

目的:探讨芍药苷对盐敏感性高血压(SSH)大鼠血压和血管内皮功能的影响及其相关作用机制。方法:将50只Dahl盐敏感大鼠随机分为正常对照组(Control组)、高盐组(SSH组)、芍药苷组(PF组)、磷脂酰肌醇-3-激酶(PI3K)/蛋白激酶B(AKT)/哺乳动物雷帕霉素靶蛋白(mTOR)信号通路激活剂组(740Y-P组)、芍药苷+740Y-P组(PF+740Y-P组),每组10只。各组大鼠进行4周给药干预。采用动物无创血压仪测量大鼠尾动脉收缩压、舒张压;酶联免疫吸附法(ELISA)测定大鼠血清内皮素-1(ET-1)、一氧化氮(NO)、血栓素B2(TXB2)水平;苏木精-伊红(HE)染色观察大鼠主动脉病理变化;免疫组织化学染色检测大鼠主动脉组织中内皮型一氧化氮合酶(eNOS)表达;蛋白质免疫印迹法(Western Blot)检测大鼠主动脉组织中PI3K/AKT/mTOR信号通路蛋白表达。结果:与Control组比较,SSH组和740Y-P组大鼠主动脉血管内皮不完整,部分血管内皮脱落,且内膜明显增厚、外膜有大量沉积物;PF组大鼠主动脉血管病理损伤较SSH组明显减轻;PF+740Y-P组大鼠主动脉血管病理损伤较740Y-P组明显减轻,但较PF组明显加重。与Control组比较,SSH组大鼠收缩压、舒张压、血清ET-1、TXB2水平均升高,血清NO水平降低(P<0.05);主动脉组织中eNOS表达水平降低,磷酸化(p)-PI3K/PI3K、p-AKT/AKT、p-mTOR/mTOR比值均升高(P<0.05)。与SSH组比较,PF组大鼠收缩压、舒张压、血清ET-1、TXB2水平均降低,血清NO水平升高(P<0.05);主动脉组织中eNOS表达水平升高,p-PI3K/PI3K、p-AKT/AKT、p-mTOR/mTOR比值均降低(P<0.05)。与PF组比较,PF+740Y-P组大鼠收缩压、舒张压、血清ET-1、TXB2水平均升高,血清NO水平降低(P<0.05);主动脉组织中eNOS表达水平降低,p-PI3K/PI3K、p-AKT/AKT、p-mTOR/mTOR比值均升高(P<0.05)。与740Y-P组比较,PF+740Y-P组大鼠收缩压、舒张压、血清ET-1、TXB2水平均降低,血清NO水平升高(P<0.05);主动脉组织中eNOS表达水平升高,p-PI3K/PI3K、p-AKT/AKT、p-mTOR/mTOR比值均降低(P<0.05)。结论:芍药苷可以有效降低SSH大鼠血压,并改善大鼠血管内皮功能,其作用机制可能与抑制PI3K/AKT/mTOR信号通路激活有关。

基于NOX4/ROS/NF-κB通路探讨补阳还五汤对Dahl盐敏感性大鼠高血压肾损伤的保护机制

目的通过观察研究补阳还五汤对Dahl盐敏感大鼠烟酰胺腺嘌呤二核苷酸磷酸氧化酶4(NOX4)/活性氧/促使核转录因子-кB(NOX4/ROS/NF-κB)信号转导通路的影响,探讨补阳还五汤对Dahl盐敏感性大鼠高血压肾损伤的保护机制。方法7周龄Dahl盐敏感大鼠60只,分为正常组,模型组,补阳还五汤低、中、高剂量组和氢氯噻嗪共6组,每组10只。所有大鼠于SPF级动物实验中心适应性饲养7 d,均给予普通饲料。随后进入实验阶段,正常组每日采用低盐饲料喂养(NaCl含量0.3%饲料),其余各组采用高盐饲料喂养(NaCl含量8%),7 d后开始药物干预,补阳还五汤低、中、高剂量组按成人和大鼠给药量换算,每100 g大鼠每日给药量分别为0.275、0.55、1.1 g,氢氯噻嗪组每100 g大鼠每日给药量为1 mg。造模期间,每隔7 d定时检测大鼠收缩压。高盐饲养35 d后检测到模型组大鼠收缩压显著升高,病理组织学观察发现模型组大鼠肾脏损伤明显,则说明Dahl盐敏感性大鼠高血压肾损伤模型造模成功。随后取各组大鼠肾脏进行检测,采用酶联免疫吸附法(enzyme linked immunosorbent assay,ELISA)检测大鼠肾脏中过氧化氢酶(catalase,CAT)、超氧化物歧化酶(superoxide dismutase,SOD)、丙二醛(malondialdehyde,MDA)以及ROS表达含量;HE染色观察大鼠肾脏病理学变化;荧光定量PCR检测大鼠肾脏中NOX4、p47phox、NF-кB、白介素-6(interleukin-6,IL-6)、肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)的mRNA表达,Western blot检测大鼠肾脏中NOX4、p47phox、NF-κB、IL-6、TNF-α蛋白表达。结果与模型组大鼠相比补阳还五汤中、高剂量组大鼠收缩压下降明显(P<0.05);肾脏中CAT、SOD含量显著升高(P<0.05),MDA、ROS显著降低(P<0.05);HE染色结果显示,补阳还五汤中、高剂量组大鼠肾组织形态较模型组明显改善;NOX4、p47phox、NF-κB、IL-6、TNF-αmRNA表达和蛋白表达均降低(P<0.05)。结论补阳还五汤可能是通过调节NOX4/ROS/NF-κB通路相关信号分子的表达,抑制氧化应激与炎症反应,从而起到保护Dahl盐敏感性大鼠高血压肾损伤的作用。

GLP-1R基因多态性与血压钠钾反应性的相关性分析

目的 研究胰高血糖素样肽-1受体(GLP-1R)基因遗传变异与血压钠钾反应性的关系。方法 2004年在陕西眉县共招募了来自124个家系的514名受试者,并建立了“盐敏感性高血压研究队列”。对受试者进行了为期3 d的正常饮食、7 d的低盐饮食、7 d的高盐饮食和7 d的高盐补钾饮食干预,并测量不同干预期的血压,并采集外周血标本。此外,采用MassARRAY检测平台对GLP-1R基因的8个单核苷酸多态性(SNP)进行了分型检测。结果 GLP-1R基因SNP rs9462472与低盐期的收缩压、舒张压和平均动脉压反应呈显著相关性。而SNP rs2268637则与高盐期的收缩压反应呈显著相关性。此外,SNP rs2268637还与高盐补钾饮食期的收缩压和平均动脉压反应呈显著相关性。结论 GLP-1R基因的多态性与血压钠钾反应性密切相关,提示其参与调节血压盐敏感性及钾反应性的发生与发展。

microRNA基因多态性与血压钠钾反应性的相关性分析

目的探讨miRNA基因多态性与钠钾饮食干预后血压反应性之间的关系。方法本课题组2004年从中国陕西宝鸡7个村庄的124个家庭中招募514名参与者进行慢性盐负荷试验干预,包括3 d基线期、7 d低盐饮食、7 d高盐饮食和7 d高盐补钾饮食干预。纳入19个miRNA-SNP位点进行分析研究。结果在钠钾饮食干预过程中,受试者的血压在低盐期呈下降趋势,高盐期呈现上升趋势,而在高盐补钾后,血压则再次下降。在低盐期,miR-210-3p SNP rs12364149与收缩压反应性、舒张压反应性及平均动脉压反应性显著相关,miR-4638-3p SNP rs6601178与收缩压反应性显著相关,而miR-26b-3p SNP rs115254818与平均动脉压反应性显著相关。在高盐干预后,miR-26b-3p SNP rs115254818与收缩压反应性、舒张压反应性及平均动脉压反应性显著相关;miR-1307-5p SNP rs11191676、rs2292807与收缩压反应性及平均动脉压反应性密切相关;miR-4638-3p SNP rs6601178、miR-210-3p SNP rs12364149以及miR-382-5p SNP rs4906032、rs4143957与收缩压反应性存在显著关联性。此外,在给予补钾干预后miR-26b-3p SNP rs115254818与收缩压反应性、舒张压反应性及平均动脉压反应性关联显著;miR-1307-5p SNP rs11191676、rs2292807以及miR-19a-3p SNP rs4284505与收缩压反应性显著相关。结论miRNA基因多态性与血压钠钾反应性密切相关,提示miRNA基因可能参与血压盐敏感性及钾敏感性的形成。

驱动盐敏感性高血压形成的肾被膜下层细胞的研究进展

盐敏感性高血压作为高血压的一种,多发于西北及东北地区,发病机制相当复杂。目前有从长期应用盐后导致肾素-血管紧张素-醛固酮系统发生紊乱来解释盐敏感性高血压的;有从基因角度来研究盐敏感性高血压的;也有从受体信号通路被激活进行研究的。本综述将着重从新发现的肾脏被膜下层细胞的钠离子通道对盐敏感性高血压进行论述。