冠心病患者抗磷脂抗体与人巨细胞病毒感染关系的初步研究

目的 :研究抗磷脂抗体与冠心病的相关性 ,探讨人巨细胞病毒 (HCMV)感染与冠心病患者抗心磷脂抗体 (ACA)产生的关系。　　方法 :76例冠心病患者分为急性心肌梗塞组 (n=2 3) ,陈旧性心肌梗塞组 (n=2 7) ,不稳定性心绞痛组 (n=2 6 ) ;采用酶联免疫吸附试验法检测血清抗心磷脂抗体—免疫球蛋白 G(ACA- Ig G)、人巨细胞病毒—免疫球蛋白 G(HCMV- Ig G)、人巨细胞病毒—免疫球蛋白 M(HCMV- Ig M) ,并与正常对照组 (n=30 )进行比较。　　结果 :76例冠心病患者 ACA的阳性率为 35 .5 3% ,显著高于正常对照组的 6 .6 7% (P<0 .0 5 ) ,而急性心肌梗塞组、陈旧性心肌梗塞组、不稳定性心绞痛组 3组间 ACA的阳性率无差异。全部患者 HCMV的感染情况高于正常对照组 ,HCMV感染的冠心病患者 ACA的阳性率显著高于 HCMV未感染的冠心病患者 (P<0 .0 5 )。　　结论 :抗磷脂抗体可能是促使冠心病发生的免疫因素之一 ;HCMV不仅与冠心病的发生有关 ,而且与冠心病患者ACA的产生有密切关系。     

抗磷脂抗体综合征血栓形成的机制

抗磷脂抗体综合征 (APS)大多数症状与血栓形成有关 ,其血栓的发病机制目前尚不十分清楚 ,实验和临床结果表明 ,血清中高滴度的抗磷脂抗体 (APA)存在是血栓形成的关键 ,促血凝机理可能与以下几个方面有关。1　 APA对血管内皮细胞和血小板功能的影响细胞膜的主要结构成分是带阴电荷的磷脂 ,在 APS患者中 ,APA损伤血小板和内皮细胞膜 ,导致细胞膜内层带负电荷磷脂暴露于胞膜表面 ,APA与其结合后 ,使内皮细胞功能受损 ,APA一方面使磷脂酶 A2 诱导的花生四烯酸释放减少 ,导致前列环素 (PGI2 )合成降低 ,另一方面可选择性抑制凝血酶介导…     

深静脉血栓形成患者抗活化蛋白C与抗磷脂抗体相关性分析

目的:探讨我国深静脉血栓形成(DVT)患者抗心磷脂抗体(ACA)、狼疮抗凝因子(LA)及抗活化蛋白C(APCR)的相关关系。方法:以ELISA法检测ACA(IgG,IgM,IgA);APTT法检测LA;APTT /-APC法检测APCR;PCR-限制性片断长度多态性方法(PCR-RFLP)检测FVLeiden变异。结果:DVT组患者抗磷脂抗体(APA)、APCR的总阳性率分别为34.7%、5.5%,与对照组比较差异有统计学意义;APA阳性组APCR阳性率(12%)明显高于APA阴性组(2.1%),4例APCR阳性患者中有3例APA阳性,并能被血小板磷脂纠正,未检测到凝血因子Ⅴ(FⅤ)Leiden突变。结论:抗磷脂蛋白抗体及其产生获得性APCR是高凝状态和血栓形成的重要原因。     

抗磷脂抗体与血栓形成及其在慢性肝病中的研究进展

抗磷脂抗体(antiphspholipid antibody,APA)系自身抗体家族.APA分为狼疮抗凝物(lupus-anti-coagulant,LAC)和抗心磷脂抗体(anticardiolipin an-tibody,ACA)两大类,与之相关的抗磷脂综合征(antiphosphilipid syndrome,APS)是一种常见的获得性易栓症,其大多数症状都与血栓形成有关[1].近几年来,APA与慢性肝病的关系逐渐引起重视,主要集中于丙肝病毒(HCV)感染及酒精性肝病等 [2,3] 方面,以及与APA相关的血栓性疾病等,现将此方面的研究进展作一简要介绍.     

2型糖尿病患者与血清抗心磷脂抗体及C反应蛋白水平的关系

目的:探讨2型糖尿病患者与血清抗心磷脂抗体(ACA)、C反应蛋白(CRP)水平的关系.方法:收集2010年9月至2011年10月在淇县人民医院内分泌科132例糖尿病患者,同期设60例健康体检者为正常对照组,测定其血清抗心磷脂抗体、CRP水平.结果:糖尿病组血清ACA、CRP阳性率明显高于正常对照组,其中有血管并发症者明显高于无血管并发症者.结论:ACA、CRP在2型糖尿病发生、发展中具有重要意义,ACA进行性增高程度可能预示病变进展情况.     

冠心病患者血清抗心磷脂抗体变化与血脂的关系

目的 :探讨抗心磷脂抗体 （ACA）在冠心病 （CHD）发病中的意义及其与血脂的关系。方法 :5 2例 CHD患者及44名健康体检者分别用 EL ISA和免疫透射比浊法测定血清 ACA- Ig G,ACA- Ig M,ACA- Ig A和 TC,TG,HDL,Apo A- I,Apo B的含量。结果 :冠心病组的 ACA- Ig G水平明显高于正常对照 （P<0 .0 1） ,而 ACA- Ig G变化的水平与 TG,HDL,Apo A- I改变呈显著的相关关系 （r分别为 0 .31,- 0 .2 7和 - 0 .2 9,均 P<0 .0 1）。结论 :血清 ACA-Ig G可与血脂代谢紊乱可能共同形成 CHD的发病机制或有促进血脂代谢紊乱的作用。     

抗心磷脂抗体与系统性红斑狼疮高血压的相关性

目的 探讨抗心磷脂抗体在系统性红斑狼疮(SLE)高血压患者中的临床意义.方法 应用酶联免疫吸附法(ELISA)检测110例SLE患者和50名健康者血清中抗心磷脂抗体IgG(IgG-ACA)、抗心磷脂抗体IgM(IgM-ACA)、抗β2糖蛋白I(β2-GP1)抗体的浓度水平.结果 SLE高血压组IgG-ACA、IgM-ACA、抗β2-GP1抗体浓度水平高于SLE正常血压组、健康对照组(P＜0.05),而SLE正常血压组与健康对照组比较差异无统计学意义(P＞0.05).结论 SLE患者合并高血压时IgG-ACA、IgM-ACA、抗β2-GP1抗体浓度水平升高,提示ACA升高与狼疮性高血压的发生有关,抗心磷脂抗体检测对预测狼疮性高血压有一定参考价值.     

冠心病患者抗心磷脂抗体的研究

抗心磷脂抗体(ACA)是一种自身抗体,常见于系统性红斑狼疮及其他自身免疫性疾病。近年来文献报道该抗体与多器官的复发性动静脉血栓形成、反复自然流产及宫内死胎等关系密切[1];能导致动脉内皮细胞病变而引起冠状动脉(冠脉)闭塞[2]。目前,国内外有关冠心病(CHD)患者的ACA血清学检测报道不多,且检测结果存在一定     

室性早搏患者血清抗心磷脂抗体水平的研究

研究室性早搏 (VPC)患者血清抗心磷脂抗体 (ACA)的改变 ,探讨VPC的发病机制。采用酶联免疫吸附法 (ELISA)对临床上 3 8例单纯VPC患者及 3 5名健康人进行了ACA的IgG、IgM和IgA的血清学检测。结果发现VPC患者组血清ACA总阳性率及血清ACA IgG含量均显著高于正常对照组 (P <0 .0 1)。表明ACA与VPC存在一定的相关性     

系统性红斑狼疮与抗心磷脂抗体的关系

抗心磷脂抗体(ACA)是抗磷脂抗体的一种,目前其与系统性红斑狼疮(SLE)的关系日益受到关注。为了探讨二者的关系,我们对60例SLE病人检测ACA,并设30例正常人作对照。现报告如下。1.检测方法:试剂由上海生化研究所东     

The immunoneuroendocrine role of melatonin

Abstract: A tight, physiological link between the pineal gland and the immune system is emerging from a series of experimental studies. This link might reflect the evolutionary connection between self-recognition and reproduction. Pinealectomy or other experimental methods which inhibit melatonin synthesis and secretion induce a state of immunodepression which is counteracted by melatonin. In general, melatonin seems to have an immunoenhancing effect that is particularly apparent in immunodepressive states. The negative effect of acute stress or immunosuppressive pharmacological treatments on various immune parameters are counteracted by melatonin. It seems important to note that one of the main targets of melatonin is the thymus, i.e., the central organ of the immune system. The clinical use of melatonin as an immunotherapeutic agent seems promising in primary and secondary immunodeficiencies as well as in cancer immunotherapy. The immunoenhancing action of melatonin seems to be mediated by T-helper cell-derived opioid peptides as well as by lymphokines and, perhaps, by pituitary hormones. Melatonin-induced-immuno-opioids (MHO) and lymphokines imply the presence of specific binding sites or melatonin receptors on cells of the immune system. On the other hand, lymphokines such as -γ-interferon and interleukin-2 as well as thymic hormones can modulate the synthesis of melatonin in the pineal gland. The pineal gland might thus be viewed as the crux of a sophisticated immunoneuroendocrine network which functions as an unconscious, diffuse sensory organ.     

Response of rat pineal melatonin to calcium, magnesium, and lithium is circadian stage dependent

Abstract: Herein we documented the response of pineal melatonin production to electrolytes known to be effective on pineal function in view of a possible circadian stage dependence. We studied the release of melatonin by perifused rat pineal glands at 2 different circadian stages corresponding to the middle of the light and dark periods, i.e., respectively, 7 and 19 HALO (Hours After Light Onset, L:D = 12:12). The initial efflux rates were, as expected, much higher in the perifusates of glands removed from rats sacrificed during the dark phase than of those removed during the light phase. After 3 hr of perifusion, melatonin release reached similar levels which were found constant up to the 8th hr of perifusion, whatever the circadian stage. Perifusion of the glands with physiological concentrations for the rat of calcium (5.2 mmol/1) and magnesium (1.34 mmol/1) resulted in a stimulatory effect on the pineal glands removed from rats sacrificed in the middle of the dark period (19 HALO), whereas no effects were observed on the pineal glands removed from rats sacrificed during the light (7 HALO). Lithium (0.28 and 0.55 mmol/1) was ineffective on melatonin release in pineal glands removed 7 and 19 HALO. Our results show differences in the initial efflux rates of melatonin and in the response of perifused pineal glands to calcium and magnesium according to the circadian stage.     

Changes in connexin43, the gap junction protein of astrocytes, during development of the rat pineal gland

Abstract: The abundance of gap junctions between rat pineal astrocytes formed by connexin43 (Cx43) was studied during development. Levels and distribution of Cx43 were measured by immunoblotting and indirect immunofluorescence, respectively. The amount of Cx43 in cells located within the gland was low until about the 7th postnatal day and increased to adult values between the 14th and 21st days postpartum. Although astrocytes, recognized by their vimentin immunoreactivity, were scarce before birth, they were abundant by the 7th postnatal day suggesting that the low levels of Cx43 found at this age corresponded to a low expression of this protein. Localization of the immunoreactivity to Cx43 and vimentin showed a close correlation, indicating that mature or immature pineal astrocytes form gap junctions made of Cx43. Since Cx43 levels attained their adult values at about the time the innervation and the functional state of the gland reached maturity (2–3 weeks after birth), it is proposed that astrocyte gap junctions are involved in the function of the adult rat pineal gland.     

Conservative management of perforated duodenal diverticulum： A case report and review of the literature

Duodenal diverticula are a relatively common condition. They are asymptomatic, unless they become complicated, with perforation being the rarest but most severe complication. Surgical treatment is the most frequently performed approach. We report the case of a patient with a perforated duodenal diverticulum, which was diagnosed early and treated conservatively with antibiotics and percutaneous drainage of secondary retroperitoneal abscesses. We suggest this method could be an acceptable option for the management of similar cases, provided that the patient is in good general condition and without septic signs.     

Presence of immunoreactive growth hormone and prolactin in the ovine pineal gland

Abstract: The use of antisera raised against bovine growth hormone (GH) and ovine prolactin (PRL) enabled the detection of related immunoreactive (ir) sequences of proteins in ovine pineal tissue. The isolation of PRL-like ir-material was accomplished using a 0.25 M ammonium sulphate (pH 5.5) extraction followed by ethanol precipitation, whereas the resulting 2.0 M ammonium sulphate (pH 7.0) precipitate contained a GH-like immunoreactivity. Gel chromatography of the GH-like immunoreactivity (Sephadex G-100) indicated the presence of several GH-like fragments ranging in the M_r range of 7,000 to 55,000. Analyses of the PRL-like ir-material found in pineal tissue on HPLC using a TSK 545-DEAE column led to the resolution into a single peak of immunoreactivity. A single peak of activity was also observed following chromatofocusing and hydrophobic interaction chromatography of the ir-peak from the TSK 545-DEAE column. The PRL-like ir-material inhibited the binding of [¹²⁵I]ovine PRL-S14 to anti-ovine PRL antibodies without showing an affinity for binding to anti-rat PRL or anti-bovine GH antibodies. Scatchard analysis of the binding of pineal PRL-like ir-material and pituitary ovine PRL-S14 to liver membranes from day-20 pregnant rats revealed similar affinity constants (K_a of 4.7 ± 0.2 × 10⁹ M^-1). In addition, the replication of Nb 2 Node rat lymphoma cells was stimulated by pineal PRL-like ir-material, an effect known to be specific for lactogenic hormones. The pineal PRL-like immunoreactivity appeared on sodium dodecyl sulfate polyacrylamide gels as a single major band of M_r 24,000. The functional status of PRL-and GH-like ir-material in the ovine pineal remains to be determined, but evidence is presented that the overall protein synthesis rate of the rat pineal responded to circulating concentrations of PRL.     

Microbiology of human immunodeficiency virus anorectal disease

PURPOSE: Individuals who are seropositive for the human immunodeficiency virus are at high risk for opportunistic infection and anorectal disorders. Little prospective information is available regarding anorectal pathogens in these patients. METHODS: One hundred sixty-three HIV-seropositive patients presented to the colorectal clinic between 1989 and 1992. Forty-seven (29 percent) patients were thought to have an infectious process and were prospectively studied using a standardized multiculture protocol. RESULTS: Mean age was 33 (range, 19–59) years. All were male; high-risk behavior accounted for 87 percent of HIV transmissions. Presenting complaints included anorectal pain (79 percent), pus per anum (28 percent), and blood per anum (26 percent). Examination revealed perianal tenderness (60 percent), condyloma (38 percent), perianal ulcers (38 percent), and anal fissures (34 percent). Sixty-six sets of cultures were performed; 28 patients had one set, 15 had two sets, and 4 had three sets. Thirty-two of these 47 patients (68 percent) had positive cultures including herpes (50 percent), cytomegalovirus (25 percent),Neisseria gonorrhoeae (16 percent), chlamydia (16 percent), acidfast bacilli (2 percent), and others (9 percent). Six of 32 patients with positive cultures had more than one organism cultured. Sixteen (50 percent) patients with positive cultures were treated medically, 8 (25 percent) were treated surgically and 8 (25 percent) were treated with both modalities. Sixty-one procedures were performed on 17 patients for condylomata. Eighteen patients had 20 procedures for abscesses, 50 percent of whom had positive cultures for other than common bowel flora; all improved. Fourteen patients underwent 33 procedures for perianal fistulas.Mycobacterium fortuitum was cultured from one patient who required 13 procedures for abscesses and fistulas. Forty-five (96 percent) patients were followed for an average of 12.5 months ±2.9 SEM (range, 1–94 months). Symptoms were improved or resolved in 22 of 32 (69 percent) patients with positive cultures and in 11 of 13 (84 percent) with negative cultures. CONCLUSIONS: Specific pathogens may often be identified in human immunodeficiency virus-seropositive patients with anorectal disorders if aggressively sought. Although patients without specific pathogens identified may be expected to improve with planned empiric treatment, positive identification allows more directed therapy.