Restraint

约束
  • 文章类型: Journal Article
    目的:在一项随机对照试验中,比较认知行为疗法(CBT)和行为体重减轻(BWL)对暴饮暴食症(BED)的影响,探讨饮食限制作为暴饮暴食和体重减轻结局的中介。
    方法:90名参与者被随机分配到CBT或BWL,并由不了解治疗前情况的评估者进行评估。贯穿-,和治疗后(6个月)。三种饮食限制措施(饮食失调检查问卷[EDE-Q]-限制,在治疗前和治疗2个月后给予三因素柔性约束和刚性约束)。回归模型检查了限制量表在2个月时的变化是否介导了治疗(CBT与BWL)对治疗后暴饮暴食和体重减轻结果的影响。
    结果:CBT和BWL的暴食结果相似,EDE-Q约束和柔性约束的变化相似。与CBT相比,BWL在治疗后的刚性约束和体重减轻方面的2个月增加更大,结果表明,2个月的刚性约束变化介导了更大的减肥差异(>7磅)。观察到的2.92的调解效果表明,对体重减轻的总治疗效果的39%是通过2个月的刚性约束增加来介导的。
    结论:一项比较CBT和BWL治疗BED的试验中的次要分析表明,早期刚性约束的改变对BWL的体重减轻具有中介作用。研究结果表明,BWL改善了暴饮暴食,并挑战了饮食限制可能加剧肥胖BED暴饮暴食的观点。研究结果需要在未来的试验中使用假设检验进行确认。
    背景:临床试验:NCT00537758(“肥胖和暴饮暴食障碍的治疗”)。
    OBJECTIVE: To explore dietary-restraint as a mediator of binge eating and weight-loss outcomes within a randomized controlled trial comparing cognitive-behavioral therapy (CBT) and behavioral weight loss (BWL) for binge-eating disorder (BED) with obesity.
    METHODS: Ninety participants were randomly assigned to CBT or BWL and assessed by evaluators blinded to conditions at pretreatment, throughout-, and post-treatment (6 months). Three dietary-restraint measures (Eating Disorder Examination-Questionnaire [EDE-Q]-Restraint, Three-Factor Flexible-Restraint and Rigid-Restraint) were administered at pretreatment and after 2 months of treatment. Regression models examined whether changes at 2-months in the restraint scales mediated the effects of treatment (CBT versus BWL) on binge eating and weight-loss outcomes at post-treatment.
    RESULTS: CBT and BWL had similar binge-eating outcomes and similar changes in EDE-Q-restraint and flexible-restraint. BWL had greater 2-month increases in rigid-restraint and greater weight-loss at posttreatment than CBT, with results suggesting 2-month changes in rigid-restraint mediated the greater difference (>7 pounds) in weight-loss. The observed mediation effect of 2.92 suggests 39% of total treatment-effect on weight-loss was mediated through 2-month increases in rigid-restraint.
    CONCLUSIONS: This secondary analysis within a trial comparing CBT and BWL for BED suggests early-change in rigid-restraint has a mediating effect of BWL on weight-loss. Findings indicate that BWL improves binge eating and challenge views that dietary-restraint might exacerbate binge eating in BED with obesity. Findings require confirmation using hypothesis-testing in future trials.
    BACKGROUND: Clinicaltrials.gov: NCT00537758 (\"Treatment for Obesity and Binge Eating Disorder\").
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  • 文章类型: English Abstract
    当照顾智力残疾的病人时,克制往往是一种伏击。在杰罗姆·勒琼研究所,护理团队已经采取了一系列措施,旨在帮助患者和护理人员,无论是管理护理引起的疼痛还是它引起的忧虑。经过一年的实施,大量限制的数量已大大减少。
    When caring for a patient with an intellectual disability, restraint is often an ambush. At the Institut Jérôme Lejeune, the nursing team has put in place a series of measures designed to help both patient and caregiver, whether in managing the pain induced by care or the apprehension it provokes. After a year\'s implementation, the number of heavy restraints has fallen significantly.
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  • 文章类型: Journal Article
    尽管许多人呼吁减少或消除机械约束的使用,它仍然在许多国家广泛使用。使用患者访谈的研究有一个非常明确的信息:患者经历机械约束是最丢脸的干预措施。如果所有其他防止使用胁迫的方法都失败了,暴力患者似乎缺乏其他选择。我们开发了一种使用30公斤袋子的方法,最初是为健身目的而设计的,在1:1的监督下连接到患者的手腕或脚踝。该方法由10名经验丰富的护士和降级培训师进行了测试。制作了一段视频,并向六名先前经历过机械约束的门诊患者展示。所有参与者都接受了采访。使用定性内容分析对转录访谈进行了分析。所有参与者都认可该方法是机械约束的温和且较少羞辱的替代方法。护士们主要担心的是跌倒的风险和使用袋子作为武器。后者可以通过使用额外的袋子来控制。患者总体呈阳性,特别是如果有虐待的历史。该方法应进一步发展以取代至少一些机械约束。和所有“温和的意思”一样,应该注意真正取代克制,不要引入额外的胁迫。
    Despite many calls to reduce or eliminate the use of mechanical restraint, it is still widely used in many countries. Studies using patient interviews have a very clear message: Patients experience mechanical restraint as the most humiliating intervention. There seems to be a lack of alternatives for violent patients if all other approaches to prevent the use of coercion have failed. We developed a method using 30 kg bags, originally designed for fitness purposes, to be attached to a patient\'s wrist or ankle under 1:1 supervision. The method was tested with 10 experienced nurses and de-escalation trainers. A video was made and presented to six outpatients who had previously experienced mechanical restraint. All participants were interviewed. Transcribed interviews were analysed using qualitative content analysis. All participants approved of the method as a milder and less humiliating alternative to mechanical restraint. The nurses\' main concerns were the risk of falls and the use of the bags as weapons. The latter could be controlled by using an additional bag. Patients were generally positive, especially if there was a history of abuse. The method should be further developed to replace at least some mechanical restraints. As with all \'milder means\', care should be taken to really replace restraint and not to introduce additional coercion.
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  • 文章类型: Journal Article
    为了减少急性住院儿童和青少年精神科的胁迫,需要更好地了解处于隔离和/或约束(S/R)风险的个人。我们报告了有关隔离/限制患者比例以及与S/R高风险相关的因素的数据。通过住院时的风险分层确定预防机制可以帮助培训心理健康专业人员,并支持为处于危险中的人群制定具体的工作流程,例如通过联合危机计划或胁迫后的审查会议。
    方法:一项病例对照研究包括2019年至2022年36个月内儿童和青少年精神科的所有入院(n=782)。年龄数据,性别,离开家庭护理,主要和共病ICD-10诊断,逗留时间,使用分类卡方检验和连续变量t检验,比较有S/R和无S/R的入院前/多次入院.计算一元和多元二元逻辑回归模型。
    结果:S/R的总比例为12.8%(n=100)。女性(p=0.001),家庭外护理患者(p<0.001),与先前入院(p<0.001),创伤后应激障碍(PTSD;p<0.001)和边缘性人格障碍(BPD;p<0.001)的S/R风险显着升高。以天为单位的停留时间(OR1.01),脱离家庭护理(OR3.85),PTSD(OR6.20),BPD(或15.17),注意缺陷多动障碍(ADHD)/品行障碍(OR4.29),在多因素回归分析中,躁狂发作/双相障碍(OR36.41)与S/R显著相关。
    结论:儿童和青少年精神科工作人员在采取强制措施时应考虑危险因素。PTSD和/或BPD患者是最脆弱的亚组。需要对专业人员和临床实践进行培训,以防止使用S/R及其潜在危害。
    To reduce coercion in acute inpatient child and adolescent psychiatric units, a better understanding of individuals at risk for seclusion and/or restraint (S/R) is needed. We report data on the proportion of patients secluded/restrained and factors associated with higher risk of S/R. Identifying preventative mechanisms through risk stratification upon inpatient admission can aid the training of mental health professionals, and support shaping specific workflows for at-risk populations for example by joint crisis plans or post-coercion review sessions.
    METHODS: A case-control study included all admissions (n = 782) to a department of child and adolescent psychiatry within 36 months between 2019 and 2022. Data on age, sex, out of home care, primary and comorbid ICD-10 diagnoses, length of stay, prior/multiple admissions were compared between admissions with and without S/R using chi square tests for categorical and t-tests for continuous variables. Uni- and multivariate binary logistic regression models were computed.
    RESULTS: The overall proportion of S/R was 12.8% (n = 100). Females (p = 0.001), patients in out of home care (p < 0.001), with prior admission (p < 0.001), Post-traumatic stress disorder (PTSD; p < 0.001) and Borderline personality disorder (BPD; p < 0.001) were at a significantly higher risk of S/R. Length of stay in days (OR 1.01), out of home care (OR 3.85), PTSD (OR 6.20), BPD (OR 15.17), Attention deficit hyperactivity disorder (ADHD)/conduct disorder (OR 4.29), and manic episode/bipolar disorder (OR 36.41) were significantly associated with S/R in multivariate regression.
    CONCLUSIONS: Child and adolescent psychiatric staff should consider risk factors when using coercive measures. Patients with PTSD and/or BPD are the most vulnerable subgroups. Training of professionals and clinical practice need to be adapted in order to prevent the use of S/R and its potential hazards.
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  • 文章类型: Journal Article
    In 1962, Ontario\'s Addiction Research Foundation launched the first double-blind randomized controlled trial of LSD therapy as a treatment for alcoholism. The study, which found that LSD was not effective, was heavily criticized by other therapists working with the drug. These critics argued that the Toronto researchers who carried out the study were biased against LSD and used an anti-therapeutic method that was destined to produce negative results. Instead of creating a comfortable and supportive environment, they stressed, the Toronto group restrained patients to a bed in a hospital ward, used an unusually large dose of LSD, and hardly provided any careful therapeutic support. Some even compared this method to a \"form of torture.\" Historians have paid little attention to the study, mentioning it only as an example of flawed or naïve LSD therapy that contrasted with the more advanced \"psychedelic\" approach developed in Saskatchewan. In this paper, I take a closer look at the Toronto psychiatrists who carried out the study and created the unique method that was employed. I show that they were actually quite excited about LSD and were more sophisticated in their approach to its use than has been appreciated by historians and critics. In many ways, they had their own brand of LSD expertise that differed from that of the Saskatchewan group. Some of the problems with the ARF study, then, did not stem from negative bias or a lack of competency, but instead resulted from the awkward relationship between LSD therapy and controlled trials.
    Résumé. En 1962, la Fondation pour la recherche sur la toxicomanie de l’Ontario lançait son premier test aléatoire et contrôlé en double aveugle de thérapie par le LSD pour traiter l’alcoolisme. L’étude, qui concluait que le LSD n’était pas efficace, a fait l’objet de critiques sévères de la part d’autres thérapeutes qui utilisaient cette drogue. Ces thérapeutes soutenaient que le groupe de recherche torontois avait un parti pris défavorable au LSD et avait employé des méthodes antithérapeutiques dans le but de produire des résultats négatifs. Ainsi, selon eux, au lieu de créer un environnement offrant un réel soutien, le groupe de Toronto attachait les patients à leur lit d’hôpital, employait des doses inhabituellement élevées de LSD et ne fournissait à peu près aucun soutien thérapeutique. La méthode a même été comparée à « une forme de torture ». Les historiennes et les historiens ont accordé peu d’attention à l’étude, sauf pour la citer comme exemple déficient ou naïf de thérapie par le LSD, en l’opposant à l’approche « psychédélique » plus avancée mise au point en Saskatchewan. Dans cet article, je m’intéresse aux psychiatres qui ont mené l’étude de Toronto et conçu la méthode originale employée à la Fondation. Je montre que l’usage du LSD suscitait beaucoup d’enthousiasme dans le groupe et que son utilisation de cette drogue était plus complexe que l’ont reconnu jusqu’ici l’histoire et la critique. À plusieurs égards, le groupe de Toronto disposait de sa propre expertise en matière de LSD, différente de celle de ses collègues de la Saskatchewan. J’en conclus qu’une partie des problèmes attribués à l’étude conduite par la Fondation ne provient pas d’un préjugé défavorable ou d’un manque de compétence, mais plutôt des liens complexes entre la thérapie par le LSD et les essais cliniques.
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  • 文章类型: Journal Article
    在试图控制和终止暴力发作时,通常使用身体约束。侵略性背后可能有许多原因,激动,和暴力行为。其中一些因素可以在法医尸检中检测到,也可以从患者的医疗记录中看出。已经提出了在身体约束期间死亡的各种原因。在这项研究中,我们想审查所有使用身体约束的事件,以被约束的人的死亡结束,约束是否由警察实施,保安,警方拘留人员,医护人员或普通平民。主要目的是看看这种新的研究设计是否会增加我们对在克制情况下导致死亡的情况和原因的了解。数据是在2010-2015年期间从芬兰南部地区进行的所有法医尸检中回顾性收集的。我们检查了21,036例法医尸检病例,发现12例(0.06%)在死前进行了身体约束。在7/12案件中,警察参与了身体约束:在其中两起案件中,只有警察;在三起案件中,警察和警卫;在两种情况下,警察和医护人员。平民在5/12案例中进行了克制。平民负责克制,与警察和其他当局负责约束的情况相比,死亡原因更有可能被认为是约束本身的结果。这可能是因为平民没有接受安全约束方法的教育,他们自己可能会陶醉。酒精是这项研究中发现的最常见的精神活性物质,不仅可能是攻击行为的危险因素,也可能是死亡的危险因素。因为饮酒会引起心律失常甚至猝死。基于这项研究,和以前发表的研究,我们认为克制死亡是不同范围的死亡,其中死亡通常可能是许多因素的结果,包括激动和克制的影响,中毒,心脏病和其他疾病。
    Physical restraint is usually used when trying to control and terminate a violent episode. Many causes are possible behind aggressive, agitated, and violent behavior. Some of these are such factors that can either be detected in forensic autopsies or can be evident from the person\'s medical records. Various causes for deaths during physical restraint have been suggested. In this study, we wanted to review all incidents in which physical restraint was employed, ending in death of the restrained person, whether the restraint was applied by police officers, security guards, police custody personnel, health care personnel or ordinary civilians. The main aim was to see if this new kind of study design would increase our knowledge in circumstances and causes leading to death in restraint situations. Data was collected retrospectively from all forensic autopsies performed in the Southern Finland area during 2010-2015. We went through 21,036 forensic autopsy cases and found 12 cases (0.06 %) in which a physical restraint was employed before death. Police officers were involved in the physical restraint in 7/12 of the cases: in two of these cases, police alone; in three cases, police and guards; and in two cases, police and health care personnel. Civilians carried out the restraint in 5/12 cases. With civilians responsible for the restraint, the cause of death was more likely considered to be a result of the restraint itself than in cases where police and other authorities were responsible for the restraint. This could be because civilians aren\'t educated about safe restraint methods, and they might themselves be intoxicated. Alcohol was the most common psychoactive substance found in this study and could be a risk factor for not only aggressive behavior but also death, since alcohol use can provoke cardiac arrhythmias and even sudden death. Based on this study, and previously published studies, we see restraint deaths as a varying spectrum of deaths, in which the death is often possibly a result of many factors, including the effects of agitation and restraint, intoxication, and cardiac and other illnesses.
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  • 文章类型: Journal Article
    目的:攻击行为在精神科住院患者中很常见。隔离和约束干预措施来管理患者的攻击行为可能会给患者带来创伤。儿科精神病患者对使用隔离和约束干预措施的看法在文献中没有出现。
    方法:这项诠释学护理研究提出了以下问题:“我们如何理解儿童在住院精神病院的隔离和约束的经历?”过去的四位儿科精神病住院患者分享了他们在10岁那年发生的住院经历。将研究访谈的文本与依恋理论进行了比较,以更深入地理解信息的含义。
    结果:参与者通常将隐居和束缚的经历描述为在黑暗的房间中感到被困和孤独。他们建议护士和他们一起走进房间帮助他们康复。解释性地,住院病房的房间可以被认为是可能受到伤害或治愈的实际和隐喻空间。
    结论:参与者的声音扩大了对护士在病房门口使用辨别的理解,以确保通过安全的护患关系为这些空间的患者提供最多的治疗性护理。
    OBJECTIVE: Aggressive behavior is common on psychiatric inpatient units. Seclusion and restraint interventions to manage patients\' aggressive behavior may have the consequence of being traumatizing for patients. Pediatric psychiatric patients\' perspective on the use of seclusion and restraint interventions is not present in the literature.
    METHODS: This hermeneutic nursing research study asked the question, \"How might we understand children\'s experiences of seclusion and restraints on an inpatient psychiatric unit?\" Four past pediatric psychiatric inpatients shared their hospitalization experiences that occurred within the previous year when they were 10 years old. The texts of the research interviews were compared to Attachment Theory for a deeper understanding of the meaning of the message.
    RESULTS: Participants commonly described experiences with seclusion and restraints as feeling trapped and alone in a dark room. They recommended the nurses step into the room with them to help them heal. Interpretively, the rooms on inpatient units could be considered as actual and metaphorical spaces of possible harm or healing.
    CONCLUSIONS: The participant\'s voices expand understanding of nurse\'s use of discernment at the doorway of a patient room to ensure the most therapeutic care is provided to the patient in these spaces through a secure nurse-patient relationship.
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  • 文章类型: Journal Article
    目的:这篇综述的主要目的是(1)确定最近发表的文献用于描述物理/机械约束构造的定义中的主题元素,成人精神健康住院部的隔离和化学约束。
    方法:我们对六个数据库进行了全面的文献检索(Scopus,MEDLINE,PsycINFO,WebofScience,Embase,和CINAHL-Plus)。在这次审查中,我们进行了内容分析,以综合证据来理解和比较不同形式限制性护理实践定义中包含的概念要素的共性和差异.
    结果:总共95项研究为不同形式的限制性护理实践提供了定义[物理/机械约束(n=72),隔离(n=65)和化学限制(n=19)]包括在这篇综述中。在物理/机械约束的应用定义中提出的概念域中存在重大变化,隐居,和化学约束。这篇综述中确定的概念主题是限制性护理实践的方法,原因和预期结果,限制性护理实践期间患者限制的程度,定时(持续时间,频率,和一天中的时间),患者自主性的水平,以及实施这些做法的人员。
    结论:用于描述不同形式的限制性护理实践结构的术语和概念边界的不一致强调了在认可反映不同观点的共识定义方面向前迈进的必要性,确保实践和研究的清晰度和一致性。这将有助于有效地衡量和比较不同医疗机构和司法管辖区限制性护理实践使用的实际趋势。
    OBJECTIVE: The main purpose of this review was to (1) identify thematic elements within definitions used by recently published literature to describe the constructs of physical/mechanical restraint, seclusion and chemical restraint in adult mental health inpatient units.
    METHODS: We conducted a comprehensive literature search of six databases (Scopus, MEDLINE, PsycINFO, Web of Science, Embase, and CINAHL-Plus). In this review, we conducted content analysis to synthesize evidence to understand and compare the commonalities and discrepancies in conceptual elements that were incorporated within the definitions of different forms of restrictive care practices.
    RESULTS: A total of 95 studies that provided definitions for different forms of restrictive care practices [physical/mechanical restraint (n = 72), seclusion (n = 65) and chemical restraint (n = 19)] were included in this review. Significant variations existed in the conceptual domains presented within the applied definitions of physical/mechanical restraint, seclusion, and chemical restraint. Conceptual themes identified in this review were methods of restrictive care practice, reasons and desired outcomes, the extent of patient restriction during restrictive care practice episodes, timing (duration, frequency, and time of the day), the level of patient autonomy, and the personnel implementing these practices.
    CONCLUSIONS: Inconsistencies in the terminologies and conceptual boundaries used to describe the constructs of different forms of restrictive care practices underscore the need to move forward in endorsing consensus definitions that reflect the diverse perspectives, ensuring clarity and consistency in practice and research. This will assist in validly measuring and comparing the actual trends of restrictive care practice use across different healthcare institutions and jurisdictions.
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  • 文章类型: Journal Article
    Care,管理,和法规,每个都要求在英国的精神病环境中进行限制报告。本期刊中的PROD-ALERT(“PA1”)与约束的对数发生率相关,日志机构规模,记录拘留。期间为2020年9月至2021年8月。这在记者中显示出明显的趋势。限制与机构规模和合法拘留的使用有关。尽管有这种趋势,一些大型拘留提供者仍报告每月没有限制。从规模上的推断表明,不完整的记者每月限制1,774人。这篇论文“PA2”开发了2021年9月至2022年8月重复它的分析。PA2显示如何计算L信息,即,可疑信息,由空报告添加,通过对数据集应用L检验。PA2使用有关人类身高的说明性插图来根据英语约束报告中的L信息得分。在PA2中,报告的克制再次与PA1中的规模和拘留有关。PA2显示了不断发展的数据。供应商仍然遵循规模和拘留限制的趋势。新报告克制的供应商正在趋势。推论表明,不完整的记者每月限制1,305人(536-3233),95%CI,自PA1以来数量较大但减少。英语约束数据的L测试L信息分数为信息增加了L=145。这与声称平均1.72米的英国男子身高2.64米一样令人惊讶。每月被限制的人数是一项强有力的措施,继续与规模和法律强制相关。报告无效限制的一定规模的提供商可能有一些。在英格兰,克制仍然被低估。对不完整的记者的填补显示,大量患者被不完整的记者拘留。了解这一点可以促进报告。改进报告,以及它所要求的基础设施和完整性,可以帮助提供者衡量和减少约束。PA1仍未反驳。L检验可以以直观表示的方式测量L信息。零位对可靠数据集的信息影响类似于声称平均身高男性与临床巨人症患者一样高的说法。
    Care, management, and statute each mandate restraint-reporting in psychiatric settings in England. PROD-ALERT in this journal (\"PA1\") correlated log incidence of restraint, log institutional size, and log detention. The period was September 2020 to August 2021. It showed a clear trend among reporters. Restraint correlated with institutional size and use of legal detention. Some large detaining providers reported no restraints per month despite that trend. Inference from size suggested that non-complete reporters restrained 1,774 people per month. This paper \"PA2\" develops analysis repeating it for September 2021 to August 2022. PA2 shows how to count L-information, i.e., questionable information, added by null reports, by applying an L-test to data sets. PA2 uses illustrative vignettes about human height to ground L-information scores from English restraint reporting. In PA2, reported restraint again correlates with size and detention as in PA1. PA2 shows evolving data. Providers still follow a trend in restraint by size and detention. Providers which newly report restraint are on trend. Inference suggests that non-complete reporters restrained 1,305 people per month (536-3233), 95% CI, a large but reduced number since PA1. English restraint data have an L-test L-information score of increase in information by a factor of L = 145. This is as surprising as claiming that an average English man of 1.72 m is 2.64 m tall. Persons restrained per month is a robust measure continuing to log-correlate with size and legal compulsion. Providers over a certain size who report null restraint probably have some. Restraint remains underreported in England. Imputation of incomplete reporters shows a large shrinking cohort of patients detained by incomplete reporters. Knowledge of this may promote reporting. Improved reporting, and the infrastructure and integrity it demands, may help providers measure and reduce restraint. PA1 remains unrefuted. L-test can measure L-information in intuitively representable ways. The informational effect of nulls on the reliable data set is similar to a claim that an average-heighted man is as tall as people with clinical gigantism.
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  • 文章类型: Journal Article
    脊椎动物的应激反应调节了血浆细菌杀伤能力(BKA),包括两栖动物.补体系统是由血浆中存在的一组蛋白质组成的效应机制,所述蛋白质一旦被激活就可以促进细菌裂解。在这里,我们调查了二指蟾蜍急性应激反应和免疫攻击导致的血浆BKA变化是否由补体系统介导。此外,我们调查了观察到的血浆BKA变化是否与血浆皮质酮水平(CORT)的变化相关.我们对成年雄性蟾蜍进行抑制或免疫攻击(三种浓度的嗜水气单胞菌热灭活),然后评估血浆BKA对嗜水杆菌的影响,在体外。我们测定了血浆BKA的补体系统活性,通过处理血浆(基线,1小时和24小时后约束,免疫攻击后)用乙二胺四乙酸,热,或蛋白酶。我们的结果表明,抑制后1h和24hCORT升高,抑制后24h血浆BKA降低。与未处理的血浆相比,补体系统的抑制剂始终降低了血浆BKA(基线,1h,和约束后24小时),证明血浆BKA活性部分由补体系统介导。免疫挑战增加了CORT,在最高的细菌浓度中观察到最高值,与对照相比。血浆BKA不受免疫攻击的影响,但已证明部分由补体系统介导。我们的结果表明,克制和免疫攻击激活下丘脑-垂体-肾间轴,通过增加R.diptycha的血浆CORT水平。此外,我们的结果表明,补体系统参与了这些蟾蜍基线和应激后的血浆BKA.
    The plasma bacterial killing ability (BKA) is modulated by the stress response in vertebrates, including amphibians. The complement system is an effector mechanism comprised of a set of proteins present in the plasma that once activated can promote bacterial lysis. Herein, we investigated whether changes in plasma BKA as a result of the acute stress response and an immune challenge are mediated by the complement system in Rhinella diptycha toads. Additionally, we investigated whether the observed changes in plasma BKA are associated with changes in plasma corticosterone levels (CORT). We subjected adult male toads to a restraint or an immune challenge (with three concentrations of Aeromonas hydrophila heat inactivated), and then evaluated the plasma BKA against A. hydrophila, in vitro. We determined the complement system activity on plasma BKA, by treating the plasma (baseline, 1 h and 24 h post-restraint, and after the immune challenge) with ethylenediaminetetraacetic acid, heat, or protease. Our results showed increased CORT 1 h and 24 h after restraint and decreased plasma BKA 24 h post-restraint. The inhibitors of the complement system decreased the plasma BKA compared with untreated plasma at all times (baseline, 1 h, and 24 h after restraint), demonstrating that the plasma BKA activity is partially mediated by the complement system. The immune challenge increased CORT, with the highest values being observed in the highest bacterial concentration, compared with control. The plasma BKA was not affected by the immune challenge but was demonstrated to be partially mediated by the complement system. Our results demonstrated that restraint and the immune challenge activated the hypothalamus-pituitary-interrenal axis, by increasing plasma CORT levels in R. diptycha. Also, our results demonstrated the complement system is participative in the plasma BKA for baseline and post-stress situations in these toads.
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