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1.
目的 观察山莨菪碱(654-2)预处置对大鼠油酸型急性呼吸窘迫综合征(ARDS)血清及肺组织中IL-6、IL-8、TNF-α及IL-10的影响,探讨654-2治疗ARDS的理论基础。方法 经舌下静脉注射油酸复制大鼠ARDS模型,用酶联免疫吸附试验测定血清及肺组织匀浆上清液中IL-6、IL-8、TNF-α和IL-10水平。结果 ARDS组大鼠血清IL-6、TNF-α、IL-10含量和肺组织匀浆上清液中IL-6、IL-10含量明显高于对照组(P<0.01或0.05)。654-2预处置组血清和肺组织中IL-10水平显著高于对照组(P<0.01或0.05)。654-2预处置组血清和肺组织中IL-6、TNF-α含量明显低于ARDS组(P<0.01或0.05),而IL-8和IL-10含量两者无显著性差异。结论 IL-6、IL-8、TNF-α及IL-10在大鼠油酸型ARDS炎症过程中可能起重要作用,654-2可能通过抑制IL-6、TNF-α过度分泌而减轻肺损伤。  相似文献   

2.
目的 探讨地塞米松对大鼠内毒素(LPS)急性肺损伤(ALI)肺泡灌洗液中白细胞介素-1β(IL-1β)和肿瘤坏死因子-α(TNF-α)含量的影响.方法 将48只雄性SD大鼠随机分为正常对照组、急性肺损伤组(内毒素ALI模型组)、地塞米松干预组,每组16只.每组大鼠依据不同的观察时间点(以大鼠气管内滴注LPS的时刻为起始时刻后的1、2、4、8 h 4个时间点)分为4个亚组(n=4).给予正常对照组气管内滴注0.9%氯化钠溶液 0.3 mL,10 min后股静脉注射0.9%氯化钠溶液 1 mL;急性肺损伤组气管内滴注LPS 0.2 mg/kg(溶于0.3 mL 0.9%氯化钠溶液),10 min后股静脉注射0.9%氯化钠溶液 1 mL;地塞米松干预组气管内滴注LPS 0.2 mg/kg,10 min后股静脉注射地塞米松注射液3 mg/kg(溶于1 mL 0.9%氯化钠溶液).各组于1、2、 4、8 h 4个时间点于心脏抽血检测动脉血氧分压(PaO2);取肺组织进行肺湿/干质量比值(W/D)测定,并采用苏木精-伊红(HE)染色观察肺组织形态学变化;用酶联免疫吸附测定(ELISA)法检测肺泡灌洗液(BALF)中IL-1β和TNF-α的含量.结果 给予气管内滴注LPS后于1、2、4、8 h观察大鼠动脉血PaO2,急性肺损伤组、地塞米松干预组较正常对照组显著降低,两组PaO2均在4 h时达最低点,各时间点动脉血PaO2对比,地塞米松干预组均显著高于急性肺损伤组,差异均有统计学意义(P〈0.05).在LPS致炎后1、2、4、8 h 4个时间点急性肺损伤组、地塞米松干预组各时间点W/D比值均较正常对照组显著增加,两组间比较地塞米松干预组较急性肺损伤组降低,差异具有统计学意义(P〈0.05).病理形态学观察可见急性肺损伤组与地塞米松干预组均出现肺水肿、出血、炎性细胞浸润,而地塞米松干预组肺损伤程度较急性肺损伤组减轻.ELISA试验结果显示急性肺损伤组在气管内滴入LPS 1 h后BALF中IL-1β、TNF-α含量迅速升高,4 h时达峰值,地塞米松干预后IL-1β、TNF-α表达在相同时间点均较模型组显著降低,差异具有统计学意义(P〈0.05);而正常对照组BALF中IL-1β、TNF-α在不同时间点无明显变化.结论 地塞米松可通过抑制内毒素性大鼠ALI肺组织中IL-1β、TNF-α的表达,改善呼吸氧合功能,减轻肺损伤.  相似文献   

3.
目的:研究橙皮苷对重症肺炎大鼠肺组织炎症和细胞凋亡影响。方法:构建重症肺炎大鼠模型,分为SD组、Control组、Model组(肺炎模型)、Hesperidin-L组(12 mg/kg橙皮苷治疗)、Hesperidin-M组(24 mg/kg橙皮苷治疗)、Hesperidin-H组(36 mg/kg橙皮苷治疗),检测肺组织湿干重比(W/D),对肺组织病理损伤程度评分,计数肺泡灌洗液中炎症细胞数目,qRTPCR检测肺组织中TNF-α、IL-1β、IL-6、iNOS mRNA水平,ELISA检测TNF-α、IL-1β、IL-6含量,Western blot检测肺组织中Bax、ccaspase-3、Bcl-2、p-STAT3、p-JAK2、STAT3、JAK2、JAK1和p-JAK1蛋白表达水平,TUENL染色检测肺组织中细胞凋亡水平。结果:与Control组相比,Model组大鼠肺组织病理评分升高,W/D升高,肺泡灌洗液中单核巨噬细胞、淋巴细胞、中性粒细胞、白细胞数目均升高,肺组织中炎症介质TNF-α、IL-1β、IL-6、iNOS mRNA表达水平和TNF-α、IL-1β、IL-6含量均...  相似文献   

4.
目的:探讨L-精氨酸对大鼠急性肺损伤的影响及机理.方法:采用尾静脉注射脂多糖(lipopolysaccharide,LPS)制备大鼠急性肺损伤模型.将45只大鼠随机分为三组:生理盐水对照组(NS组)、急性肺损伤模型组(LPS组)和L-精氨酸预处理组(L-Arg组)(n=15),再各分为2、6、24 h三个时间点.LPS组尾静脉注射LPS(6 mg/kg)制备急性肺损伤模型,L-Arg组在造模前0.5 h腹腔注射L-Arg 500 mg/kg.测定各组大鼠不同时间点的动脉血气分析,肺组织湿/干重(W/D)比,肺组织HE病理切片,ELISA法测定血清TNF-α,硝酸还原酶法测定血清NO,Real Time-PCR法测定肺组织iNOSmRNA.结果:LPS组动脉血氧降低、W/D增高、血清TNF-α及NO增高、肺组织iNOSmRNA增高,且与对照组比较有显著差异(P<0.05),肺组织HE病理切片有肺损伤改变.L-Arg组肺损伤有改善,上述检测指标与LPS组有显著差异(P<0.05).结论:L-精氨酸预处理对LPS致大鼠急性肺损伤有保护作用.  相似文献   

5.
目的:研究JAK/STAT信号通路抑制剂tyrphostinA1对大鼠油酸性肺损伤的影响,并探讨其作用机制。方法: 以大鼠油酸型ALI为研究对象,利用动物肺功能测定仪测定肺损伤过程中吸气气道阻力(Ri)和动态肺顺应性(Cdyn)的变化,利用光镜观察肺部形态学变化,称重法计算肺指数及湿/干比(W/D),紫外分光光度法检测肺组织微血管的渗透性和肺泡灌洗液(BALF)中蛋白含量,酶联免疫吸附法(ELISA)检测肺泡灌洗液(BALF)TNF-α、IL-6和IL-10的含量。结果: TyrphostinA1明显改善大鼠肺功能,减轻肺组织病理学损伤,降低肺指数及肺湿/干重比,降低肺渗透性和肺泡灌洗液(BALF)中蛋白及TNF-α、IL-6的含量,提高肺泡灌洗液(BALF)中IL-10的含量。结论: TyrphostinA1能抑制油酸诱导的肺损伤,其作用机制可能与调节细胞因子(TNF-α、IL-6和IL-10)的合成与释放有关。  相似文献   

6.
目的:探讨血管内皮生长因子(VEGF)对子宫内膜异位症(EMs)大鼠缺氧以及炎症微环境的作用机制。方法:采用自体子宫内膜移植法构建大鼠EMs模型。动物实验分为假手术组、模型组、对照组、实验组。其中假手术组大鼠在造模过程中仅进行子宫内膜截取,不进行内膜移植,每日尾静脉注射VEGF-siRNA-NC,模型组、对照组和实验组大鼠在造模后每日尾静脉注射VEGF-siRNA-NC,实验组大鼠每日尾静脉注射VEGF-siRNA。处死大鼠后检测各组大鼠异位内膜的体积;ELISA检测各组大鼠血清中TNF-α和IL-1β含量。高通量测序确定RNA干扰后的靶点基因。Western blot检测样本组织中VEGF、缺氧诱导因子-1α(HIF-1α)和髓过氧化物酶(MPO)的表达。结果:高通量测序结果显示HIF-1α、MPO为干扰VEGF的RNA后的靶点基因。与假手术组相比,模型组、对照组、实验组大鼠的异位内膜体积、血清中TNF-α和IL-1β含量和样本中VEGF、HIF-1α、MPO表达均明显升高;与对照组相比,实验组大鼠的异位内膜体积、血清中TNF-α和IL-1β含量和样本中VEGF、HIF-1α、MPO...  相似文献   

7.
目的:探讨竹节参皂苷IVa(saponin from Panax japonicus IVa, SPJ IVa)对大鼠急性肺损伤的影响,并对其可能的保护机制进行初步的探索。方法:将60只SD大鼠随机均分为4组,每组15只:对照组、模型组、低剂量SPJ IVa组和高剂量SPJ IVa组。以脂多糖(LPS,2 mg/kg)气管内滴注法建立大鼠急性肺损伤模型,低、高剂量SPJ IVa组大鼠在造模后30 min分别腹腔注射15和45 mg/kg SPJ IVa。造模后24 h,收集血清、支气管肺泡灌洗液(bronchoalveolar lavage fluid, BALF)和肺组织。HE染色法评估肺组织病理形态学变化;称重法测定肺组织湿重/干重值;ELISA法检测血清和BALF中白细胞介素1β(interleukin-1β, IL-1β)、IL-6和肿瘤坏死因子α(tumor necrosis factor-α, TNF-α)水平;试剂盒法检测丙二醛(malondialdehyde, MDA)、超氧化物歧化酶(superoxide dismutase, SOD)和谷胱甘肽(glutathion...  相似文献   

8.
目的:研究阿奇霉素对慢性阻塞性肺疾病(简称慢阻肺)模型大鼠的防治作用,从气道炎症及黏液高分泌角度探讨其作用机制。方法:将18只雄性SD大鼠随机分为正常对照组、慢阻肺模型组、阿奇霉素治疗组,每组6只。通过烟熏及大鼠气管内注入脂多糖(LPS)的方法建立慢性阻塞性肺疾病大鼠模型。HE染色观察大鼠肺组织病理变化。肺功能仪检测大鼠肺通气功能。ELISA检测各组大鼠支气管肺泡灌洗液(BALF)中白细胞介素(IL)-8、IL-17和肿瘤坏死因子-α(TNF-α)的含量。Western blot及real-time PCR检测支气管肺组织中MUC5ac和Toll样受体4(TLR4)蛋白及mRNA的表达。结果:模型组大鼠支气管肺组织HE染色结果符合慢阻肺病理改变。与模型组比较,治疗组损伤程度显著减轻。模型组与对照组比较,肺功能明显下降,大鼠BALF中IL-8、IL-17、TNF-α含量明显增高(P0.05),肺组织中MUC5ac和TLR4蛋白及mRNA表达水平显著增高(P0.05)。与模型组比较,治疗组肺功能的下降减轻,大鼠BALF中IL-8、IL-17、TNF-α含量的升高受到明显抑制(P0.05),肺组织中MUC5ac和TLR4蛋白及mRNA表达水平的受到明显抑制(P0.05)。结论:阿奇霉素可降低慢阻肺模型大鼠BALF中IL-8、IL-17和TNF-α水平,抑制肺组织内MUC5ac和TLR4蛋白表达,通过减轻气道炎症及黏液高分泌来达到防治慢阻肺的作用。  相似文献   

9.
目的:观察IL-4、IL-10、IL-12在大鼠油酸型急性呼吸窘迫综合征(ARDS)不同时间血清及肺组织中的变化规律。方法:经舌下静脉注射油酸复制大鼠ARDS模型,用酶联免疫吸附试验测定不同时间血清及肺组织匀浆上清液中IL-4、IL-10和IL-12水平。结果:注射油酸4h、8h、16h组血清及肺组织中IL-10、IL-12水平均明显高于对照组(P<0.01或0.05);但注后16h组血清和注后8h组肺组织中IL-10水平均明显低于4h组(P<0.05);血清中IL-4水平在注射油酸4h、8h组均明显高于对照组(P<0.01或0.05);而16h组则明显低于4h组(P<0.05);肺组织中IL-4水平在4h、8h、16h组均明显高于对照组(P<0.01),而16h组则明显低于8h组(P<0.05)。肺系数和肺组织病理学变化在注射油酸后4h组改变最明显。结论:IL-4、IL-10和IL-12在大鼠油酸型ARDS炎症过程中可能起重要作用;ARDS时促炎性和抗炎性细胞因子相继产生,而两者相互作用的失衡与ARDS肺损伤的关系值得深入探索。  相似文献   

10.
目的:评估褪黑素预处理对油酸引起的大鼠急性肺损伤的拮抗作用。方法:24只大鼠随机分为生理盐水组、油酸组和褪黑素预处理组3组,检测大鼠肺泡灌洗蛋白、肺的湿干比重、丙二醛、超氧化物岐化酶水平,并进行肺的病理组织学检查。结果:(1)静脉注射0.15 mL/kg油酸引起肺泡灌洗蛋白、肺的湿干比重显著增高(P<0.01),病理组织学检查发现有肺出血、肺水肿、肺泡间隔增厚以及肺泡腔出现炎性细胞,导致严重的急性肺损伤;(2)提前60 min腹腔注射20 mg/kg褪黑素明显减轻上述的症状,与丙二醛的降低(P<0.01)和超氧化物岐化酶的升高(P<0.01)相一致。结论:褪黑素预处理可通过清除和防止自由基的形成,进一步降低肺泡毛细血管膜通透性的增加,从而减轻油酸引起的大鼠急性肺损伤。提示褪黑素可能在急性肺损伤的防治中是有效的。  相似文献   

11.
Over 200 schizophrenic patients belonging to three major and interrelated pedigree complexes have been investigated over the past 30 years in a North Swedish geographically isolated population, presently numbering about 6,000. An intensive investigation of a number of biochemical correlates and genetic markers in a few selected families belonging to one of the major pedigrees has indicated new strategies for the current research program.
Schizophrenia, as defined operationally, is significantly associated with decreased activities of two enzymes (1) blood platelet monoamine oxidase, (2) plasma dopamine-β-hydroxylase, and (3) with the genetic marker Gc2 (group specific antigen). Both enzymes are subject to genetic variation. A positive score for linkage between schizophrenia and low plasma DBH activity has been calculated, but, so far, available data are insufficient for discrimination between linkage and partial contribution of genetically controlled low plasma DBH to the pathogenesis of the disease. Alternatively, both mechanisms could be involved.
As a model for continued research, schizophrenia is explained as based on a double dominant-recessive genotype (Aabb), representing a vulnerability which in about 50 % of cases develops into clinical schizophrenia. It is suggested that the dominant mutation (A) operates on or affects MAO activity, and that the recessive genotype (bb) is instrumental in low variates of DBH activity and very likely such variates within the normal range of physiological variation. Moreover, it is suggested that the combined effects of MAO- and DBH-reduced efficiency on the metabolism of e.g. dopamine could be an essential pathogenic mechanism for the schizophrenic illness which is segregating in this population.  相似文献   

12.
Renal dysplasia and asplenia in two sibs   总被引:2,自引:0,他引:2  
A family is reported in which two sibs, one male and the other female, both died within 24 hours of birth with enlarged polycystic kidneys. Postmortem histology in the second child showed gross renal dysplasia. In both children the pancreas was enlarged, nodular and cystic but the liver appeared macroscopically normal. In the second child, histological examination confirmed pancreatic fibrosis with cystic dilation of ducts, but showed portal fibrosis with bile duct proliferation in the liver.
This combination of findings is very reminiscent of those in a girl and her brother reported by Ivemark et al. (1959). The children reported here also showed absence or hypoplasia of the spleen, cardiac anomalies and other features of the Ivemark syndrome (Ivemark 1955), a quite different, usually sporadic, congenital disorder. It is suggested that the children described here have a distinct lethal congenital disorder, probably inherited in an autosomal recessive manner.  相似文献   

13.
About 1900, modern food selection and processing caused widespread epidemics of the B vitamin deficiency diseases of beriberi and pellagra which, for genetic reasons, often expressed as different diseases ranging from bowel and heart disease to dermatoses and psychoses. But the B vitamins merely help convert essential fatty acids (EFA) into the prostaglandin (PG) tissue regulators and it now turns out that, through hydrogenation, milling and selection of w3-poor southern foods, we have also been systematically depleting, by as much as 90%, a newly discovered trace Nordic EFA (w3) of special importance to primates and sole precursor of the PG3(4) series, even as a concurrent fiber deficiency increases body demand for EFA. Since substrate EFA is processed by many B vitamin catalysts, an EFA deficiency will mimic a panhypovitaminosis B, i.e., a mixture of substrate beriberi and substrate pellagra resembling vitamin beriberi and pellagra but exhibiting as even more diverse endemic disease. This would consitute a second stage of the Modern Malnutrition and explain why some workers now hold the dominant diseases of modermized societies to be new, nutritionally based, pellagraform yet lipid-related and to range, once again, from heart disease to psychosis. It is an assumption that our dominant diseases are unrelated to each other or are merely revealed by our diagnostic acumen and therapeutic success; and that hydrogenating millions of tons of food oils annually, to destroy the rancidity producing w3-EFA, is safe for primates. Extensive beriberiform disease is reported here in 32 typical cases taken from medical practice which responds strikingly to linseed oil supplements (60% w3-EFA) in confirmation of identical results in Capuchins.  相似文献   

14.
15.
Newton H 《Medical history》2011,55(2):153-182
Sick children were ubiquitous in early modern England, and yet they have received very little attention from historians. Taking the elusive perspective of the child, this article explores the physical, emotional, and spiritual experience of illness in England between approximately 1580 and 1720. What was it like being ill and suffering pain? How did the young respond emotionally to the anticipation of death? It is argued that children’s experiences were characterised by profound ambivalence: illness could be terrifying and distressing, but also a source of emotional and spiritual fulfilment and joy. This interpretation challenges the common assumption amongst medical historians that the experiences of early modern patients were utterly miserable. It also sheds light on children’s emotional feelings for their parents, a subject often overlooked in the historiography of childhood. The primary sources used in this article include diaries, autobiographies, letters, the biographies of pious children, printed possession cases, doctors’ casebooks, and theological treatises concerning the afterlife.  相似文献   

16.
Recent advancements in agricultural biotechnology have created a need for analytical techniques to determine introduced proteins in crops enhanced through modern biotechnology techniques. These proteins are expressed in plant tissues and may be present in food ingredients. Immunoassays are ideally suited for protein detection and may be used as both quantitative and threshold methods. Microplate ELISA and lateral flow devices are two of the most commonly used immunoassay formats for agricultural biotechnology applications. This paper provides general background information and a discussion of criteria for the validation and application of immunochemical methods to the analysis of proteins introduced into plants and food ingredients using biotechnology methods. It is the result of a collaborative effort of members of the Analytical Environmental Immunochemical Consortium. This collaborative effort represents the combined expertise of several organizations to reach consensus on establishing guidelines for the validation and use of immunoassays. Further, the paper offers developers and users a consistent approach to adopting the technology as well as aid in producing accurate and meaningful results.  相似文献   

17.
HLA-A,-B,-C,-DRB1 and -DQB1 alleles have been studied in Chimila Amerindians from Sabana de San Angel (North Colombian Coast) by using high resolution molecular typing. A frequent extended haplotype was found:HLA-A*24:02-B*51:10-C*15:02-BRB1*04:07-DQB1*03:02 (28.7%) which has also been described in Amerinndian Mayos Mexican population (Mexico, California Gulf, Pacific Ocean). Other haplotypes had already been found in Amerindians from Mexico (Pacific and Atlantic Coast), Peru (highlands and Amazon Basin), Bolivia and North USA. A geographic pattern according to HLA allele or haplotype frequencies is lacking in Amerindians, as already known. Also, five new extended haplotypes were found in Chimila Amerindians. Their HLA-A*24:02 high frequencies characteristic is shared with aboriginal populations of Taiwan; also, HLA-C*01:02 high frequencies are found in New Zealand Maoris, New Caledonians and Kimberly Aborigines from Australia. Finally, this study may show a model of evolutionary factors acting and rising one HLA allele frequency (-A*24:02), but not in others that belong to the same or different HLA loci.  相似文献   

18.
The preparation steps usually necessary for obtaining ultrathin frozen sections of biological material (chemical prefixation, enclosing, cryoprotective treatment, freezing, sectioning, and post-staining the sections for transmission electron microscopy) are submitted to a critical analysis. The application of cryo-ultramicrotomy, in particularly for cytochemical purposes, is reviewed. Fundamental considerations of chemical prefixation and poststaining are supported by examples from yeast cytology. Furthermore, the efficiency of the cryo-ultramicrotomy (electron optical resolution of ultrastructural details) is demonstrated on yeast cells and protoplasts.  相似文献   

19.
Starting with the integument, we see many organs are contractile sacs or multiples thereof, which tubes or bags constitute the major part of the entire body. Recognition of this basic unit and its characteristics sheds new light, individually and collectively, on many disorders previously considered unrelated. Muscular tears and perforations develop in the walls of these chambers, being no way peculiar to those organs, wherein, hydrochloric acid occurs. So, it is not necessary to explain the absence of excessive acid from patients who exhibit holes in the gastric, uterine, aortic, duodenal, rectal, pulmonary, retina, and other walls. Muscle, not acid is the great common factor relating idiopathic disorders in the gastrointestinal tract to each other and to similar diseases in other systems. When the units are linked together, the lesions tend to appear as arthropathies, i.e. at the joints. Rephrasing common-place observations, frees us from conventional, conceptual cul-de-sacs. An observation is only as good as its interpretation, so all possibilities must be considered, otherwise, we will remain blinded by our misconceptions.  相似文献   

20.
Zusammenfassung Der Einfluß von verschiedenen Nahrungsmitteln auf Methoden zur Bestimmung von Adrenalin (AD), Noradrenalin (NA), Vanillinmandelsäure (VMS), Metanephrinen (MN), Homovanillinsäure (HVS) und 5-Hydroxyindolessigsäure (5-HIE) im 24 h-Harn zur Diagnose des Phäochromozytoms bzw. Karzinoid-Syndroms wurde untersucht. Die in die Untersuchung einbezogenen Nahrungsmittel waren: Tee, Kaffee, Mandeln, Ananas, Käse, Walnüsse, Vanillepudding, Bananen, Tomaten und Milchschokolade. Außerdem wurde der Einfluß des Zigarettenrauchens auf die Bestimmung von AD, NA, VMS und MN untersucht.Walnüsse führten zu einer starken Erhöhung der 5-HIE-Ausscheidung. Bananen erhöhten die Ausscheidung von AD, NA, VMS, MN und 5-HIE. Kaffee und Ananas bewirkten eine geringe Zunahme der MN-Werte. Rauchen von 20–30 Zigaretten/Tag beeinflußte keine der vier Variablen.Wenn die beschriebenen Methoden benutzt werden, sollte lediglich auf den Verzehr von Bananen und Walnüssen vor und während der Harnsammelperioden verzichtet werden, da die oberen Normgrenzen im Harn überschritten werden könnten. Ein Verzicht auf Kaffee und Ananas in normalen Mengen ist nicht erforderlich. Es besteht kein Anlaß, weiterhin die bisherigen umfangreichen Restriktionen der übrigen Nahrungsmittel beizubehalten.  相似文献   

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