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Safety and tolerability of experimental hookworm infection in humans with metabolic disease: study protocol for a phase 1b randomised controlled clinical trial.
BMC Endocrine Disorders ( IF 2.7 ) Pub Date : 2019-12-11 , DOI: 10.1186/s12902-019-0461-5
Doris Pierce 1 , Lea Merone 2 , Chris Lewis 2 , Tony Rahman 3 , John Croese 3 , Alex Loukas 1 , Malcolm McDonald 2 , Paul Giacomin 1 , Robyn McDermott 2
Affiliation  

BACKGROUND Abdominal obesity and presence of the metabolic syndrome (MetS) significantly increase the risk of developing diseases such as Type 2 diabetes mellitus (T2DM) with escalating emergence of MetS and T2DM constituting a significant public health crisis worldwide. Lower prevalence of inflammatory and metabolic diseases such as T2DM in countries with higher incidences of helminth infections suggested a potential role for these parasites in the prevention and management of certain diseases. Recent studies confirmed the potential protective nature of helminth infection against MetS and T2DM via immunomodulation or, potentially, alteration of the intestinal microbiota. This Phase 1b safety and tolerability trial aims to assess the effect of inoculation with helminths on physical and metabolic parameters, immune responses, and the microbiome in otherwise healthy women and men. METHODS Participants eligible for inclusion are adults aged 18-50 with central obesity and a minimum of one additional feature of MetS recruited from the local community with a recruitment target of 54. In a randomised, double-blind, placebo-controlled design, three groups will receive either 20 or 40 stage three larvae of the human hookworm Necator americanus or a placebo. Eligible participants will provide blood and faecal samples at their baseline and 6-monthly assessment visits for a total of 24 months with an optional extension to 36 months. During each scheduled visit, participants will also undergo a full physical examination and complete diet (PREDIMED), physical activity, and patient health (PHQ-9) questionnaires. Outcome measurements include tolerability and safety of infection with Necator americanus, changes in metabolic and immunological parameters, and changes in the composition of the faecal microbiome. DISCUSSION Rising cost of healthcare associated with obesity-induced metabolic diseases urgently calls for new approaches in disease prevention. Findings from this trial will provide valuable information regarding the potential mechanisms by which hookworms, potentially via alterations in the microbiota, may positively influence metabolic health. TRIAL REGISTRATION The protocol was registered on ANZCTR.org.au on 05 June 2017 with identifier ACTRN12617000818336. Alternatively, a Google search using the above trial registration number will yield a direct link to the trial protocol within the ANZCTR website.

中文翻译:

在患有代谢性疾病的人类中实验性钩虫感染的安全性和耐受性:1b期随机对照临床试验的研究方案。

背景技术随着全球范围内严重的MetS和T2DM的出现,腹部肥胖和代谢综合征(MetS)的存在显着增加了患上2型糖尿病(T2DM)等疾病的风险。在蠕虫感染发生率较高的国家,诸如T2DM之类的炎性和代谢性疾病的患病率较低,表明这些寄生虫在预防和控制某些疾病中具有潜在作用。最近的研究证实了蠕虫感染通过免疫调节或可能改变肠道菌群而对MetS和T2DM的潜在保护作用。这项1b期安全性和耐受性试验旨在评估接种蠕虫对身体和代谢参数,免疫反应,以及其他健康人群中的微生物群。方法符合纳入条件的参与者是18-50岁的中心型肥胖成年人,并且从当地社区招募的MetS至少具有一项附加特征,招募目标为54。在随机,双盲,安慰剂对照设计中,三组将会接受20或40个人类钩虫美洲三期幼虫或安慰剂的幼虫。符合条件的参与者将在基线和每6个月进行一次评估访视时提供血液和粪便样本,共进行24个月,并可选延长至36个月。在每次预定的访问期间,参与者还将接受全面的身体检查和完整的饮食(PREDIMED),身体活动以及患者健康(PHQ-9)问卷。结果测量结果包括美洲轮虫感染的耐受性和安全性,代谢和免疫学参数的变化以及粪便微生物组组成的变化。讨论与肥胖引起的代谢性疾病相关的医疗保健费用不断上涨,迫切需要在疾病预防方面采取新的方法。该试验的结果将提供有关钩虫潜在机制的有价值信息,钩虫可能通过微生物群的改变而对代谢健康产生积极影响。试用注册该协议已于2017年6月5日在ANZCTR.org.au上注册,标识为ACTRN12617000818336。另外,使用上述试用注册号的Google搜索将直接链接到ANZCTR网站内的试用协议。代谢和免疫学参数的变化,以及粪便微生物组组成的变化。讨论与肥胖引起的代谢性疾病有关的医疗保健费用不断上涨,迫切需要在疾病预防方面采取新的方法。该试验的发现将提供有关钩虫潜在机制的宝贵信息,钩虫可能通过微生物群的改变而对代谢健康产生积极影响。试用注册该协议已于2017年6月5日在ANZCTR.org.au上注册,标识为ACTRN12617000818336。另外,使用上述试用注册号的Google搜索将直接链接到ANZCTR网站内的试用协议。代谢和免疫学参数的变化,以及粪便微生物组组成的变化。讨论与肥胖引起的代谢性疾病有关的医疗保健费用不断上涨,迫切需要在疾病预防方面采取新的方法。该试验的发现将提供有关钩虫潜在机制的宝贵信息,钩虫可能通过微生物群的改变而对代谢健康产生积极影响。试用注册该协议已于2017年6月5日在ANZCTR.org.au上注册,标识为ACTRN12617000818336。另外,使用上述试用注册号的Google搜索将直接链接到ANZCTR网站内的试用协议。讨论与肥胖引起的代谢性疾病相关的医疗保健费用不断上涨,迫切需要在疾病预防方面采取新的方法。该试验的发现将提供有关钩虫潜在机制的宝贵信息,钩虫可能通过微生物群的改变而对代谢健康产生积极影响。试用注册该协议已于2017年6月5日在ANZCTR.org.au上注册,标识为ACTRN12617000818336。另外,使用上述试用注册号的Google搜索将直接链接到ANZCTR网站内的试用协议。讨论与肥胖引起的代谢性疾病相关的医疗保健费用不断上涨,迫切需要在疾病预防方面采取新的方法。该试验的发现将提供有关钩虫潜在机制的宝贵信息,钩虫可能通过微生物群的改变而对代谢健康产生积极影响。试用注册该协议已于2017年6月5日在ANZCTR.org.au上注册,标识为ACTRN12617000818336。另外,使用上述试用注册号的Google搜索将直接链接到ANZCTR网站内的试用协议。可能会通过微生物群的改变而对代谢健康产生积极影响。试用注册该协议已于2017年6月5日在ANZCTR.org.au上注册,标识为ACTRN12617000818336。另外,使用上述试用注册号的Google搜索将直接链接到ANZCTR网站内的试用协议。可能会通过微生物群的改变而对代谢健康产生积极影响。试用注册该协议已于2017年6月5日在ANZCTR.org.au上注册,标识为ACTRN12617000818336。另外,使用上述试用注册号的Google搜索将直接链接到ANZCTR网站内的试用协议。
更新日期:2019-12-11
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