uptake

吸收量
  • 文章类型: Journal Article
    背景:运动转诊计划(ERS)已在西方国家实施,以刺激成人体育锻炼的增加,但其有效性和成本效益的证据是模棱两可的。ERS的吸收和依从性差可能会对有效性和成本效益产生负面影响,如果是由社会人口因素形成的,也可能导致或扩大健康不平等。ERS递送的不同模式具有降低成本并增强摄取和粘附性的潜力。这项研究的主要目的是研究不同的ERS交付计划对计划采纳和依从性的影响。次要目的是检查社会人口因素对计划吸收和遵守的影响,以及交付方式对交付方案核心部分的预期资源和相应成本的影响。
    方法:这是一项具有成本分析的观察性队列研究。分析了一家大型英国ERS(患者人数=28,917)的为期三年(2019-2021年)的常规监测数据。在此期间,相继实施了三个不同的交付方案:标准(所有会议都在指定的地点面对面交付),混合(会议最初是面对面的,然后切换到远程交付,以应对新冠肺炎大流行),和修改(面对面的会议,远程,或者两者的结合,根据新冠肺炎风险和个人偏好逐案确定)。进行了多层次二元逻辑和线性回归,以检查交付计划和社会人口统计学特征对吸收和依从性的影响。成本数据来自区域一级协调员,并通过国家一级NERS管理人员提供的NERS审计,并使用描述性统计数据进行汇总。
    结果:交付方案对方案的接受没有影响。与标准方案(平均参加23.1次练习)的人相比,修改后的方案的人依从性较高(平均出席25.7次),而混合方案的人依从性较低(平均出席19.4次)。年纪大了,或者来自贫困程度较低的地区,增加摄取和坚持的可能性。女性增加了摄取的机会,但与较低的依从性有关。从二级保健转介到该计划的患者比从初级保健转介到预防目的的患者更有可能接受该计划,然而,他们参加锻炼的人数较低。该计划典型的16周周期面对面交付的每人估计费用为65.42英镑。该计划的实际交付周期相同(在大流行背景之外)估计每人花费201.71英镑。
    结论:这项研究提供了有关交付计划对ERS吸收和依从性影响的新证据,并加强了有关社会经济因素影响的现有证据。研究结果将ERS提供者的注意力引向特定的患者亚组,如果要解决不平等,需要额外的干预来支持吸收和坚持。在提供者可能正在考虑替代交付方案的时候,这些发现挑战了预期,即实施虚拟交付必然会导致成本节约。
    BACKGROUND: Exercise Referral Schemes (ERSs) have been implemented across Western nations to stimulate an increase in adult physical activity but evidence of their effectiveness and cost-effectiveness is equivocal. Poor ERS uptake and adherence can have a negative impact on effectiveness and cost-effectiveness and, if patterned by socio-demographic factors, can also introduce or widen health inequalities. Different modes of ERS delivery have the potential to reduce costs and enhance uptake and adherence. The primary aim of this study was to examine the effect of different programmes of ERS delivery on scheme uptake and adherence. Secondary aims were to examine the effect of socio-demographic factors on scheme uptake and adherence, and the impact of delivery mode on the expected resource and corresponding costs of delivering core parts of the programme.
    METHODS: This was an observational cohort study with cost analysis. Routine monitoring data covering a three-year period (2019-2021) from one large UK ERS (number of patients = 28,917) were analysed. During this period three different programmes of delivery were operated in succession: standard (all sessions delivered face-to-face at a designated physical location), hybrid (sessions initially delivered face-to-face and then switched to remote delivery in response to the Covid-19 pandemic), and modified (sessions delivered face-to-face, remotely, or a combination of the two, as determined on a case-by-case basis according to Covid-19 risk and personal preferences). Multi-level binary logistic and linear regression were performed to examine the effect of programme of delivery and socio-demographic characteristics on uptake and adherence. Cost data were sourced from regional-level coordinators and through NERS audits supplied by national-level NERS managers and summarised using descriptive statistics.
    RESULTS: There was no effect of programme of delivery on scheme uptake. In comparison to those on the standard programme (who attended a mean of 23.1 exercise sessions) those on the modified programme had higher adherence (mean attendance of 25.7 sessions) while those on the hybrid programme had lower adherence (mean attendance of 19.4 sessions). Being older, or coming from an area of lower deprivation, increased the likelihood of uptake and adherence. Being female increased the chance of uptake but was associated with lower adherence. Patients referred to the programme from secondary care were more likely to take up the programme than those referred from primary care for prevention purposes, however their attendance at exercise sessions was lower. The estimated cost per person for face-to-face delivery of a typical 16-week cycle of the scheme was £65.42. The same cycle of the scheme delivered virtually (outside of a pandemic context) was estimated to cost £201.71 per person.
    CONCLUSIONS: This study contributes new evidence concerning the effect of programme of delivery on ERS uptake and adherence and strengthens existing evidence concerning the effect of socio-economic factors. The findings direct the attention of ERS providers towards specific patient sub-groups who, if inequalities are to be addressed, require additional intervention to support uptake and adherence. At a time when providers may be considering alternative programmes of delivery, these findings challenge expectations that implementing virtual delivery will necessarily lead to cost savings.
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  • 文章类型: Journal Article
    背景:英国提供了使用粪便免疫化学测试的肠癌筛查,目的是降低结直肠癌的死亡率。然而,在整个英国的少数民族中,参与率很低。信仰干预措施有可能提高这些人群的筛查率,但是研究它们的有效性的研究很少。
    方法:我们在东伦敦的七个清真寺(干预组)为204名穆斯林提供了关于肠癌筛查的报告。所有参与者都填写了一份关于态度的问卷,介绍前后对肠癌筛查的认识和知识。同时,我们对72名参加清真寺的未接受报告的受试者(对照组)进行了问卷调查.
    结果:干预组表现出更高的测试意愿(90%vs.67%,p<0.001),并推荐给其他人(96%与74%,p<0.001),自己完成测试的能力(94%vs.56%,p<0.001)和注意症状的信心(78%vs.32%,p<0.001)在演示后与之前相比。干预组演示后与对照组在进行测试的意图上存在显着差异(90%vs.79%,p=0.02),推荐给其他人(96%与83%,p<0.001),以及对自己完成测试的能力的信心(94%vs.63%,p<0.001)。
    结论:对培养敏感,在清真寺提供的信仰健康教育干预可以大大提高肠癌筛查的知识,并增加参与筛查计划的意愿。
    干预演讲是利用来自四个公众参与会议的见解而开发的,四个到六个成员代表东伦敦穆斯林社区。会议征求与会者对社区干预设计的适当方法的想法,并征求他们对可接受性的意见,消息传递的适当性,格式/设计和演示文稿的可能影响。然后利用他们的观点来改进演示文稿。
    BACKGROUND: Bowel cancer screening using faecal immunochemical testing is provided in the United Kingdom with the aim of reducing mortality from colorectal cancer. However, there are low participant rates among ethnic minorities across the United Kingdom. Faith-placed interventions have the potential to improve screening rates among such populations, but studies examining their effectiveness are scarce.
    METHODS: We delivered a presentation on bowel cancer screening to 204 Muslims in seven mosques in East London (intervention group). All participants completed a questionnaire regarding attitudes, perceptions and knowledge of bowel cancer screening before and after the presentation. Concurrently, we administered the questionnaire to 72 subjects attending a mosque that did not receive the presentation (comparison group).
    RESULTS: The intervention group showed a greater willingness to do the test (90% vs. 67%, p < 0.001) and to recommend it to others (96% vs. 74%, p < 0.001), ability to complete the test by themselves (94% vs. 56%, p < 0.001) and confidence in noticing symptoms (78% vs. 32%, p < 0.001) after the presentation compared to before. There was a significant difference between the intervention group post-presentation and the comparison group on intention to do the test (90% vs. 79%, p = 0.02), recommending it to others (96% vs. 83%, p < 0.001), and confidence in their ability to complete the test by themselves (94% vs. 63%, p < 0.001).
    CONCLUSIONS: A culture-sensitive, faith-placed health education intervention delivered in mosques can substantially improve knowledge of bowel cancer screening and increase the intention to participate in the screening programme.
    UNASSIGNED: The intervention presentation was developed using insights from four public involvement sessions with four to six members representative of the East London Muslim community. The sessions sought attendees\' thoughts on appropriate ways to approach the intervention design for their community and asked for their views on the acceptability, appropriateness of messaging, format/design and likely impact of the presentation. Their views were then utilised to improve the presentation.
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  • 文章类型: Journal Article
    要实现95-95-95目标,需要一种高效和创新的以人为本的方法,特别是基于社区的差异化服务提供(DSD),改善获得人类免疫缺陷病毒(HIV)服务的机会,并减轻卫生系统的负担。因此,本研究旨在评估HIV感染者(PLHIV)中基于社区的DSD模型和相关因素的使用情况.
    对埃塞俄比亚南部公共卫生机构的PLHIV进行了一项多中心横断面研究。收集数据并输入EpiData版本3.1,然后导出到Stata版本14用于进一步分析。在双变量逻辑回归分析中,P值≤0.25的变量纳入多变量logistic回归分析.使用<0.05的p值鉴定统计学上显著的因素。
    在381例稳定的PLHIV中,55.91%为女性。中位年龄(四分位数范围)为40岁(27-53)。基于社区的DSD模型的使用率为19.16%。居住和披露是与基于社区的DSD模型的采用显着相关的两个独立因素。
    在抗逆转录病毒疗法中,五分之一的稳定PLHIV采用了基于社区的DSD模型。埃塞俄比亚资源有限的医疗保健系统需要改善吸收,以更好地实现95-95-95目标。
    UNASSIGNED: Achieving the 95-95-95 targets require an efficient and innovative person-centered approach, specifically community-based differentiated service delivery (DSD), to improve access to human immunodeficiency virus (HIV) services and reduce burdens on the health system. Therefore, this study aimed to assess the uptake of community-based DSD models and associated factors among people living with HIV (PLHIV).
    UNASSIGNED: A multicenter cross-sectional study was conducted among PLHIV in public health facilities in South Ethiopia. Data were collected and entered into EpiData version 3.1 before being exported to Stata version 14 for further analysis. In the bivariable logistic regression analysis, variables with a p-value of ≤0.25 were included in the multivariable logistic regression analysis. A p-value of <0.05 was used to identify statistically significant factors.
    UNASSIGNED: Among 381 stable PLHIV, 55.91% were women. The median age (interquartile range) was 40 years (27-53). The uptake of community-based DSD models was 19.16%. Residence and disclosure were the two independent factors significantly associated with the uptake of community-based DSD models.
    UNASSIGNED: One out of five stable PLHIV on antiretroviral therapy uptake the community-based DSD models. Improvement in uptake is needed in Ethiopia\'s resource-limited healthcare system to better achieve the 95-95-95 targets.
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  • 文章类型: Journal Article
    乌头动物脱羧酶-1(ACOD1)由活化的巨噬细胞表达,并产生具有抗微生物和免疫调节作用的衣康酸酯。ACOD1-衣康酸对于巨噬细胞介导的细胞内病原体柯西氏菌控制至关重要(C.)Burnetii,导致Q热。衣康酸酯的两种异构体,美辛酸盐和柠檬酸盐,对巨噬细胞代谢和炎症基因表达有重叠但不同的活性。这里,我们发现在ACCM-2培养基中,所有三种异构体都抑制了C.burnetii在无菌培养物中的生长。然而,只有衣康酸酯有效地减少了在Acod1-/-巨噬细胞中的伯氏梭菌复制。相比之下,在Acod1+/-巨噬细胞中加入citraconate强烈增加了布氏梭菌的复制,而中生酸在Acod1-/-巨噬细胞中的细菌负荷弱增强。细胞内异构体的分析表明,外源citraconate和mesaconate抑制了感染的Acod1/-巨噬细胞产生衣康酸。衣康酸酯和中康酸酯感染后,添加的异构体对Acod1-/-巨噬细胞的摄取增加,但不是柠檬酸盐.Mesaconate,但不是citraconate,与衣康酸酯竞争摄取巨噬细胞。一起来看,巨噬细胞对衣康酸生成的抑制和对细胞外衣康酸摄取的干扰可以被确定为在巨噬细胞或无菌培养物中,衣康酸和内消旋对C.burnetii复制的不同作用背后的潜在机制。
    Aconitate decarboxylase-1 (ACOD1) is expressed by activated macrophages and generates itaconate that exerts anti-microbial and immunoregulatory effects. ACOD1-itaconate is essential for macrophage-mediated control of the intracellular pathogen Coxiella (C.) burnetii, which causes Q fever. Two isomers of itaconate, mesaconate and citraconate, have overlapping yet distinct activity on macrophage metabolism and inflammatory gene expression. Here, we found that all three isomers inhibited the growth of C. burnetii in axenic culture in ACCM-2 medium. However, only itaconate reduced C. burnetii replication efficiently in Acod1-/- macrophages. In contrast, addition of citraconate strongly increased C. burnetii replication in Acod1+/- macrophages, whereas mesaconate weakly enhanced bacterial burden in Acod1-/- macrophages. Analysis of intracellular isomers showed that exogenous citraconate and mesaconate inhibited the generation of itaconate by infected Acod1+/- macrophages. Uptake of added isomers into Acod1-/- macrophages was increased after infection for itaconate and mesaconate, but not for citraconate. Mesaconate, but not citraconate, competed with itaconate for uptake into macrophages. Taken together, inhibition of itaconate generation by macrophages and interference with the uptake of extracellular itaconate could be identified as potential mechanisms behind the divergent effects of citraconate and mesaconate on C. burnetii replication in macrophages or in axenic culture.
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  • 文章类型: Journal Article
    Extracellular vesicles (EVs) are nano-sized bilayer vesicles that are shed or secreted by virtually every cell type. A variety of biomolecules, including proteins, lipids, coding and non-coding RNAs, and mitochondrial DNA, can be selectively encapsulated into EVs and delivered to nearby and distant recipient cells, leading to alterations in the recipient cells, suggesting that EVs play an important role in intercellular communication. EVs play effective roles in physiology and pathology and could be used as diagnostic and therapeutic tools. At present, although the mechanisms of exosome biogenesis and secretion in donor cells are well understood, the molecular mechanism of EV recognition and uptake by recipient cells is still unclear. This review summarizes the current understanding of the molecular mechanisms of EVs\' biological journey in recipient cells, from recognition to uptake and cargo release. Furthermore, we highlight how EVs escape endolysosomal degradation after uptake and thus release cargo, which is crucial for studies applying EVs as drug-targeted delivery vehicles. Knowledge of the cellular processes that govern EV uptake is important to shed light on the functions of EVs as well as on related clinical applications.
    胞外囊泡(EVs)是几乎所有细胞均能分泌的纳米级脂质双层囊泡,可通过将其内含的多种包括蛋白质、脂质、编码和非编码RNA、线粒体DNA等在内的生物活性分子递送到邻近和远处的受体细胞中,以改变受体细胞功能,从而实现细胞间的信息交流。EVs在生理和病理过程中均发挥着重要作用,可用于疾病诊疗。尽管EVs在供体细胞中的生物发生和分泌机制已基本清晰,但受体细胞对EVs的识别和摄取的分子机制尚不清楚。本文对EVs进入受体细胞的生物过程包括受体细胞对EVs的识别、摄取以及EVs的货物释放进行综述,并重点关注了EVs在摄取后如何通过“溶酶体逃逸”,从而释放货物,将有助于推进EVs作为药物递送载体的研究。此外,了解和控制EVs在受体细胞中的有效摄取,对阐明EVs的功能及其临床应用同样至关重要。.
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  • 文章类型: Journal Article
    系统植物保护产品,如新烟碱(NIs),能够在整个植物中转移。尽管NIs对哺乳动物的毒性较小,鱼,和鸟,它们对微生物和非目标昆虫的影响令人担忧。这项研究调查了吸收,易位,和NI的积累,吡虫啉(IMI),在生菜中(LactucasativaL.var。longipolia)。将15天龄的幼苗暴露于“10毫克/升”的IMI,研究了对栽培(CS)和非栽培土壤(NCS)中微生物群落的影响以及植物组织内的IMI易位。初始施用后,土壤中IMI的浓度随时间和土壤类型之间的变化而变化,CS和NCS从采样第一天的2.0和7.7mg/kg下降到最终采样日(第35天)的0.5和2.6mg/kg,分别。在CS和NCS中,IMI土壤的半衰期分别为10.7天和72.5天,分别,表明IMI在CS中降解更快,可能是由于晶粒尺寸较小,曝气,微生物降解,和水流。在CS和NCS中,莴苣组织中IMI的累积浓度范围为12.4±0.2和18.7±0.9mg/kg,分别。在枝条中发现了最高浓度的IMI,其次是根,而在试验结束时,土壤显示出最低的IMI残差。通过IMI的应用改变了土壤细菌和真菌,细菌群落中的丰度指数较低,这表明对土壤中细菌的分布有负面影响。
    Systemic plant protection products, such as neonicotinoids (NIs), are capable of being translocated throughout a plant. Although NIs are less toxic to mammals, fish, and birds, their impact on microbial and non-target insects is of concern. This study investigates the uptake, translocation, and accumulation of the NI, imidacloprid (IMI), in romaine lettuce (Lactuca sativa L. var. longipolia). Exposing 15-day-old seedlings to \"10 mg/L\" of IMI, the effects on microbial communities in both cultivated (CS) and non-cultivated soil (NCS) were studied along with IMI translocation within plant tissues. The concentrations of IMI in soil varied temporally and between soil types after initial application, with a decrease from 2.0 and 7.7 mg/kg on the first day of sampling to 0.5 and 2.6 mg/kg on the final sampling day (day 35) for CS and NCS, respectively. The half-life of IMI soil was 10.7 and 72.5 days in CS and NCS, respectively, indicating that IMI degraded more quickly in CS, possibly due to smaller grain size, aeration, microbial degradation, and water flow. The accumulated concentrations of IMI in lettuce tissues ranged from 12.4 ± 0.2 and 18.7± 0.9 mg/kg in CS and NCS, respectively. The highest concentration of IMI was found in the shoots, followed by the roots, whereas the soil showed the lowest IMI residuals at the end of the trial. Soil bacteria and fungi were altered by the application of IMI, with a lower abundance index within the bacterial community, indicating a negative impact on the distribution of bacteria in the soil.
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  • 文章类型: Journal Article
    2022年,法国的人乳头瘤病毒(HPV)疫苗覆盖率<50%,在社会弱势群体中甚至更低。我们旨在评估HPV疫苗意识的社会人口统计学决定因素,摄取,以及青少年父母的意愿,以及相关的态度和知识项目。在法国各地上中学的青少年家长,参加随机试验的人对匿名基线调查做出了回应,在2021年11月至2022年2月期间进行。我们使用逻辑回归模型来调整儿童的年龄和性别,以探索社会人口统计学决定因素(包括在家使用多种语言,职业类别,当地剥夺指数和城市化)对HPV疫苗的认识,摄取,和意图。在来自61所学校的1889名参与者中,与高管/专业人员相比,作为工厂工人/农民工作的父母对疫苗的认识几率大大降低,如果他们报告(OR=0.07;0.03-0.15)或不报告(OR=0.20;0.11-0.36)在家里也说法语以外的另一种语言。具有多语言家庭的较低职业类别的父母不太可能打算给孩子接种疫苗(OR=0.19;0.07-0.56)。最近的医生访问或疫苗提供是意识的强烈积极决定因素,吸收和意图。关于HPV疫苗有用性的态度和知识在职业类别中观察到了很大的梯度,安全,和可访问性。这项研究证实了法国HPV疫苗摄取的差异,并提供了对HPV疫苗意识的社会差异机制的见解。访问和意图。
    Human Papillomavirus (HPV) vaccine coverage was <50% in France in 2022 and even lower among socially disadvantaged populations. We aimed to evaluate socio-demographic determinants of HPV vaccine awareness, uptake, and intention among parents of adolescents, and related attitudes and knowledge items. Parents of adolescents attending middle schools across France, who participated in a randomized trial responded to an anonymous baseline survey, conducted between November 2021 and February 2022. We used logistic regression models adjusting for a child\'s age and sex to explore sociodemographic determinants (including at-home multilingualism, occupational categories, local deprivation index and urbanity) of HPV vaccine awareness, uptake, and intention. Among the 1889 participants from 61 schools, parents working as factory workers/farmers had significantly lower odds of vaccine awareness compared to executives/professionals, both if they reported (OR = 0.07; 0.03-0.15) or not (OR = 0.20; 0.11-0.36) speaking also another language than French at home. Parents in lower occupational categories with multilingual families were less likely to have the intention to vaccinate their child (OR = 0.19; 0.07-0.56). Recent physician visit or vaccine offer was strong positive determinants of awareness, uptake and intention. A substantial gradient across occupational categories was observed for attitudes and knowledge around HPV vaccine usefulness, safety, and accessibility. This study confirms the disparities on HPV vaccine uptake in France and provides insight into mechanisms of social disparities in HPV vaccine awareness, access and intention.
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  • 文章类型: Journal Article
    性健康和生殖健康对所有个人都至关重要,包括LGBTQ+个人。然而,女同性恋者和双性恋女性往往缺乏量身定制的服务,导致利用不足。这项研究旨在评估女同性恋和双性恋Bulawayo妇女的性健康和生殖健康服务的可用性和吸收。
    一项横断面研究调查了通过“无声组织之声”招募的67名女同性恋和双性恋女性。参与者填写了一份关于现有服务的结构化问卷,影响它们摄取的因素,和访问挑战。交叉制表用于检查变量之间的关联。数据使用MicrosoftExcel和STATA第15版S.E.
    大多数受访者是35岁的双性恋女性。交叉表格显示,延迟或避免的服务与缺乏针对女同性恋者和双性恋妇女的特定服务之间存在重大关联,以及存在性别认同非歧视政策。
    性健康和生殖健康计划在满足女同性恋和双性恋女性的需求方面发挥着至关重要的作用。改善服务吸收需要加强诊所和性健康教育计划之间的联系,提供女同性恋和双性恋女性友好的临床服务,并确保获得全面的信息。
    UNASSIGNED: Sexual and reproductive healthcare is essential for all individuals, including LGBTQ+ individuals. However, lesbians and bisexual women often lack tailored services, leading to underutilization. This study aimed to assess the availability and uptake of sexual and reproductive health services for lesbian and bisexual Bulawayo women.
    UNASSIGNED: A cross-sectional study surveyed 67 lesbian and bisexual women recruited through the Voice of the Voiceless Organization. The participants completed a structured questionnaire on available services, factors influencing their uptake, and access challenges. Cross-tabulation was used to examine the associations between variables. Data were analyzed using Microsoft Excel and STATA Version 15 S.E.
    UNASSIGNED: Most respondents were bisexual women aged 35 years. Cross-tabulations revealed significant associations between delayed or avoided services and the absence of specific services for lesbians and bisexual women as well as the presence of gender identity nondiscrimination policies.
    UNASSIGNED: Sexual and reproductive health programs play a vital role in meeting lesbian and bisexual women\'s needs. Improving service uptake requires strengthening the linkages between clinics and sexual health education programs, providing lesbian and bisexual women-friendly clinical services, and ensuring access to comprehensive information.
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  • 文章类型: Journal Article
    估计蚯蚓中农药生物浓度的现有模型在不同化学品中的适用性有限,土壤和物种限制了它们作为替代品的潜力,风险评估的中间层。我们使用了三种蚯蚓(Lumbricusterrestriris,卡利吉诺萨立克托底,费蒂达艾塞尼亚),五种农药(logKow1.69-6.63)和五种土壤(有机质含量=0.972-39.9wt%)产生一级动力学积累模型。根据文献报道的402个内部蚯蚓浓度的数据集评估了模型的适用性,其中包括用于产生模型的数据范围之外的化学和土壤性质。我们的模型使用孔隙水或整体土壤浓度准确预测身体负荷,身体负荷预测的至少93.5%和84.3%在相应观测值的10和5倍内,分别。这表明,在预测蚯蚓生物浓缩时,无需区分孔隙水和土壤暴露途径,也无需考虑不同的吸收和消除途径。我们的新模型不仅在表征土壤中蚯蚓暴露于农药的特征方面优于现有模型,但是,它也可以与模型相结合,这些模型可以解释蚯蚓的运动以及由于降解和运输而导致的土壤农药浓度的波动。
    Existing models for estimating pesticide bioconcentration in earthworms exhibit limited applicability across different chemicals, soils and species which restricts their potential as an alternative, intermediate tier for risk assessment. We used experimental data from uptake and elimination studies using three earthworm species (Lumbricus terrestris, Aporrectodea caliginosa, Eisenia fetida), five pesticides (log Kow 1.69-6.63) and five soils (organic matter content = 0.972-39.9 wt %) to produce a first-order kinetic accumulation model. Model applicability was evaluated against a data set of 402 internal earthworm concentrations reported from the literature including chemical and soil properties outside the data range used to produce the model. Our models accurately predict body load using either porewater or bulk soil concentrations, with at least 93.5 and 84.3% of body load predictions within a factor of 10 and 5 of corresponding observed values, respectively. This suggests that there is no need to distinguish between porewater and soil exposure routes or to consider different uptake and elimination pathways when predicting earthworm bioconcentration. Our new model not only outperformed existing models in characterizing earthworm exposure to pesticides in soil, but it could also be integrated with models that account for earthworm movement and fluctuating soil pesticide concentrations due to degradation and transport.
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  • 文章类型: Journal Article
    原代人肝细胞(3DPHH)的3D球体在培养中保留了数周的分化表型,具有很大程度上保守的代谢功能和蛋白质组学指纹。因此,3DPHH作为机械性肝脏稳态研究的模型以及在药物发现中的体外至体内外推(IVIVIVE)越来越重要。然而,尚未在3DPHH中评估药物转运蛋白的动力学和调节。这里,我们使用有机阳离子转运蛋白1(OCT1/SLC22A1)作为模型来研究转运动力学和通过相关信号通路对转运蛋白活性的长期调节。使用荧光模型底物4-(4-(二甲基氨基)苯乙烯基)-N-甲基吡啶(ASP)和已知的OCT1抑制剂在单个3DPHH中研究了OCT1转运蛋白的动力学。对于长期研究,3DPHH用异生物质处理7天,之后评估蛋白质表达和OCT1功能。全局蛋白质组学分析用于追踪肝脏表型以及其他调节蛋白的原型变化。如P-糖蛋白和细胞色素P450.3A4。ASP+动力学表明来自三个供体的Km值为14±4.0µM的全功能OCT1转运蛋白。与已知OCT1抑制剂的共孵育使3DPHH球状体中ASP+的摄取降低了35-52%。长期暴露研究表明,OCT1在激活核受体信号或暴露于可诱导炎症的化合物后相对稳定,脂肪变性或肝损伤。我们的结果表明,3DPHH球体表达生理相关水平的完全活性OCT1,并且可以在3DPHH构型中准确研究其转运蛋白动力学。我们还证实OCT1在改变其他药物转运蛋白和药物代谢酶的表达和功能的关键代谢途径的激活过程中保持稳定和功能。这些结果将扩大可以使用3DPHH进行的研究范围。
    3D spheroids of primary human hepatocytes (3D PHH) retain a differentiated phenotype with largely conserved metabolic function and proteomic fingerprint over weeks in culture. As a result, 3D PHH are gaining importance as a model for mechanistic liver homeostasis studies and in vitro to in vivo extrapolation (IVIVE) in drug discovery. However, the kinetics and regulation of drug transporters have not yet been assessed in 3D PHH. Here, we used organic cation transporter 1 (OCT1/SLC22A1) as a model to study both transport kinetics and the long-term regulation of transporter activity via relevant signalling pathways. The kinetics of the OCT1 transporter was studied using the fluorescent model substrate 4-(4-(dimethylamino)styryl)-N-methylpyridinium (ASP+) and known OCT1 inhibitors in individual 3D PHH. For long-term studies, 3D PHH were treated with xenobiotics for seven days, after which protein expression and OCT1 function were assessed. Global proteomic analysis was used to track hepatic phenotypes as well as prototypical changes in other regulated proteins, such as P-glycoprotein and Cytochrome P450 3A4. ASP+ kinetics indicated a fully functional OCT1 transporter with a Km value of 14 ± 4.0µM as the mean from three donors. Co-incubation with known OCT1 inhibitors decreased the uptake of ASP+ in the 3D PHH spheroids by 35-52%. The long-term exposure studies showed that OCT1 is relatively stable upon activation of nuclear receptor signalling or exposure to compounds that could induce inflammation, steatosis or liver injury. Our results demonstrate that 3D PHH spheroids express physiologically relevant levels of fully active OCT1 and that its transporter kinetics can be accurately studied in the 3D PHH configuration. We also confirm that OCT1 remains stable and functional during the activation of key metabolic pathways that alter the expression and function of other drug transporters and drug-metabolizing enzymes. These results will expand the range of studies that can be performed using 3D PHH.
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