ADA

ADA
  • 文章类型: Journal Article
    探讨2型糖尿病(T2DM)合并冠心病(CHD)患者加速衰老的影响因素。
    选择2019年8月至2023年8月在徐州市中心医院诊断为T2DM和CHD的216例患者。患者分为衰老组和非衰老组,基于表型年龄加速度(PhenoAgeAccel)的正值或负值。进行Logistic回归分析。多变量分析中包含单变量分析P<0.05的变量,以确定影响T2DM和CHD患者衰老的因素。并报告模型曲线下面积。
    这项研究包括216名患者,加速老化组89人,非加速老化组127。患者平均年龄为70.40岁(95%CI:69.10-71.69),男性137人(63.4%)。与非加速老化组相比,加速老化组的患者年龄较大,男性比例较高,高血压的患病率更高,稳定型心绞痛,和不稳定型心绞痛.多因素Logistic回归分析显示中性粒细胞绝对值(NEUT#),尿素(UREA),腺苷脱氨酶(ADA),甘油三酯-葡萄糖指数(TyG)是加速衰老的危险因素,胆碱酯酶(CHE)是保护因素。对于NEUT#的每个单位增加,尿素,ADA,和TyG,衰老的风险增加了64%,48%,10%,和789%,分别。训练集中模型的受试者工作特征(ROC)曲线下的总面积为0.894,95%置信区间(CI)为0.851-0.938。
    NEUT#,CHE,尿素,ADA,和TyG是T2DM和CHD患者加速衰老的预测因子,该模型显示出良好的整体预测性能。
    UNASSIGNED: To investigate the factors influencing accelerated aging in patients with type 2 diabetes mellitus (T2DM) and coronary heart disease (CHD).
    UNASSIGNED: A total of 216 patients diagnosed with T2DM and CHD between August 2019 and August 2023 at Xuzhou Central Hospital were selected. Patients were divided into an aging group and a non-aging group, based on the positive or negative values of phenotypic age acceleration (PhenoAgeAccel). Logistic regression analysis was conducted. Variables that had a univariate analysis P< 0.05 were included in the multivariate analysis to identify factors influencing aging in patients with T2DM and CHD, and the area under the curve of the model was reported.
    UNASSIGNED: This study included 216 patients, with 89 in the accelerated aging group, and 127 in the non-accelerated aging group. The average age of patients was 70.40 (95% CI: 69.10-71.69) years, with 137 males (63.4%). Compared with the non-accelerated aging group, patients in the accelerated aging group were older, with a higher proportion of males, and a higher prevalence of hypertension, stable angina pectoris, and unstable angina pectoris. Multivariate Logistic regression analysis indicated that the absolute value of neutrophils (NEUT#), urea (UREA), adenosine deaminase (ADA), and the triglyceride-glucose index (TyG) were risk factors for accelerated aging, while cholinesterase (CHE) was a protective factor. For each unit increase in NEUT#, UREA, ADA, and TyG, the risk of aging increased by 64%, 48%, 10%, and 789%, respectively. The overall area under the receiver operating characteristic (ROC) curve of the model in the training set was 0.894, with a 95% confidence interval (CI) of 0.851-0.938.
    UNASSIGNED: NEUT#, CHE, UREA, ADA, and TyG are predictors of accelerated aging in patients with T2DM and CHD, with the model showing favorable overall predictive performance.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    饮食脂肪假说增加了过敏性疾病与减少鱼类中n-3多不饱和脂肪酸的消耗,例如,二十碳五烯酸,从植物油中摄入n-6多不饱和脂肪酸,例如,花生四烯酸。
    建立在“脂肪假说”的基础上,“我们试图调查婴儿中24种类型的血清脂肪酸水平与作为主要结局的2岁时随后的食物诱导过敏反应(FIA)风险之间的关系。
    本研究作为ABC随机临床试验中的预设补充分析进行。我们使用气相色谱-质谱法测量了从268名5至6个月大的婴儿收集的残留血清样品中24种脂肪酸的水平。
    在258名婴儿中,58人表现出即时型食物过敏,而200则没有食物过敏。在58个婴儿中,12人被诊断为国际汽联,而其余46例有非过敏性食物过敏.出乎意料的是,在24种脂肪酸中,只有肾上腺酸,也被称为二十二碳四烯酸,它是n-6多不饱和脂肪酸之一,FIA婴儿的水平显着降低(中位数[四分位数间距](wt。%),0.16[0.14-0.17]),与没有食物过敏的人相比(0.19[0.17-0.21])(P=.0007)。相比之下,非过敏性食物过敏婴儿的肾上腺酸水平为0.19[0.16-0.21](wt.%),这与没有食物过敏的婴儿没有显着差异(P=0.69)。
    这项研究产生了一个假设,表明血清肾上腺素水平低的婴儿可能在随后的FIA风险更大。这一意外结果值得进一步调查。
    UNASSIGNED: The dietary fat hypothesis links increases in allergic diseases to reduced consumption of n-3 polyunsaturated fatty acids from fish, for example, eicosapentaenoic acid, and increased intake of n-6 polyunsaturated fatty acids from vegetable oils, for example, arachidonic acid.
    UNASSIGNED: Building upon the \"fat hypothesis,\" we sought to investigate the association between 24 types of serum fatty acid levels in infants and the risk of subsequent food-induced anaphylaxis (FIA) by age 2 years as the primary outcome.
    UNASSIGNED: This study was conducted as a prespecified supplemental analysis within the ABC randomized clinical trial. We measured levels of 24 fatty acids in residual serum samples collected from 268 infants at age 5 to 6 months using gas chromatography-mass spectrometry.
    UNASSIGNED: Among the 258 infants, 58 exhibited immediate-type food allergies, whereas 200 showed no food allergy. Of the 58 infants, 12 were diagnosed with FIA, whereas the remaining 46 had nonanaphylactic food allergy. Unexpectedly, among the 24 fatty acids, only adrenic acid, also known as docosatetraenoic acid, which is one of the n-6 polyunsaturated fatty acids, showed significantly lower levels in infants with FIA (median [interquartile range] (wt.%), 0.16 [0.14-0.17]), compared with those with no food allergy (0.19 [0.17-0.21]) (P = .0007). In contrast, adrenic acid levels in infants with nonanaphylactic food allergy were 0.19 [0.16-0.21] (wt.%), which did not differ significantly from those in infants with no food allergy (P = .69).
    UNASSIGNED: This study generated a hypothesis suggesting that infants with low serum adrenic acid levels might be at greater risk of subsequent FIA. This unexpected result warrants further investigation.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    提高癌症免疫疗法的疗效取决于确定对肿瘤控制和免疫检查点封锁(ICB)反应至关重要的关键T细胞群。我们最近报道,虽然PD-1和CD28的共表达与外周血功能受损有关,它显著增强了非小细胞肺癌(NSCLC)患者肿瘤部位的T细胞适应性.为了揭示潜在的机制,我们探索了CD26的作用,CD26是通过与腺苷脱氨酶(ADA)相互作用而激活T细胞的关键因素,一种能够中和局部腺苷(ADO)的关键细胞内/胞外酶。我们发现自分泌ADA/CD26轴增强CD8+PD-1+CD28+T细胞功能,特别是在以CD39表达为标志的免疫抑制环境中。然后,我们查询了TCGA和OAK数据集,以深入了解我们研究结果的预后/预测潜力.我们确定了预测LUAD患者总生存期(OS)和晚期LUAD患者对阿特珠单抗反应的特征。这些发现提示了靶向ADA/CD26轴的治疗干预的有希望的途径。
    Improving cancer immunotherapy efficacy hinges on identifying key T-cell populations critical for tumor control and response to Immune Checkpoint Blockade (ICB). We have recently reported that while the co-expression of PD-1 and CD28 is associated with impaired functionality in peripheral blood, it significantly enhances T-cell fitness in the tumor site of non-small cell lung cancer (NSCLC) patients. To uncover the underlying mechanisms, we explored the role of CD26, a key player in T-cell activation through its interaction with adenosine deaminase (ADA), a crucial intra/extracellular enzyme able to neutralize local adenosine (ADO). We found that an autocrine ADA/CD26 axis enhances CD8+PD-1+CD28+ T-cell function, particularly within an immunosuppressive environment marked by CD39 expression. Then, we interrogated the TCGA and OAK datasets to gain insight into the prognostic/predictive potential of our findings. We identified a signature predicting overall survival (OS) in LUAD patients and response to atezolizumab in advanced LUAD cases. These findings suggest promising avenues for therapeutic intervention targeting the ADA/CD26 axis.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    对于抗药物抗体(ADA)对相关暴露的影响敏感的适当设计的药代动力学(PK)测定是了解ADA的中和潜力的替代策略。然而,缺少有关如何开发此类PK测定以及如何确认ADA对暴露的功能性影响的指南。这里,T细胞接合双特异性抗体的PK测定,Cibisatamab,是根据其作用机制(MoA)开发的。使用关键的单克隆抗独特型(抗ID)抗体阳性对照作为ADA替代,对暴露的影响进行了临床前评估.在I期临床试验(NCT02324257)中,初始数据表明,ADA和PK测定的组合用于ADA反应与Cibisatamab暴露的相关性。为了了解患者来源的ADAs对药物活性的中和潜力,先进的ADA表征已经进行。评估了ADA与药物抗体结构域的结构结合分析及其对靶向的影响。为此,我们确定了相关患者ADA结合特征,并将其与特异性单克隆抗ID抗体阳性对照进行了比较.靶标结合抑制的可比较结果和对暴露的类似影响表明,在患者中观察到的Cmax和Ctrugh水平的降低是由ADAs的中和潜力引起的,并且允许ADA响应与暴露损失之间的相关性。因此,所描述的研究为开发适当设计的双特异性抗体PK测定提供了重要的功能方面,作为了解中和ADA对暴露影响的替代选择.
    An appropriately designed pharmacokinetic (PK) assay that is sensitive for anti-drug antibody (ADA) impact on relevant exposure is an alternative strategy to understand the neutralizing potential of ADAs. However, guidance on how to develop such PK assays and how to confirm the functional ADA impact on exposure is missing. Here, the PK assay of a T-cell-engaging bispecific antibody, cibisatamab, was developed based on its mechanism of action (MoA). Using critical monoclonal anti-idiotypic (anti-ID) antibody positive controls as ADA surrogates, the impact on exposure was evaluated pre-clinically. In a phase I clinical trial (NCT02324257), initial data suggest that the combination of ADA and PK assays for correlation of the ADA response with cibisatamab exposure. To understand the neutralizing potential of patient-derived ADAs on drug activity, advanced ADA characterization has been performed. Structural binding analysis of ADAs to antibody domains of the drug and its impact on targeting were assessed. For this purpose, relevant patient ADA binding features were identified and compared with the specific monoclonal anti-ID antibody-positive controls. Comparable results of target binding inhibition and similar impacts on exposure suggest that the observed reduction of Cmax and Ctrough levels in patients is caused by the neutralizing potential of ADAs and allows a correlation between ADA response and loss of exposure. Therefore, the described study provides important functional aspects for the development of an appropriately designed PK assay for bispecific antibodies as an alternative option towards understanding the neutralizing ADA impact on exposure.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    研究估计,在美国被监禁的人中至少有65%患有物质使用障碍(SUD)。药物辅助治疗(MAT)是阿片类药物使用障碍(OUD)的有效治疗方法。MAT将每年死于OUD的人数减少了50%,而恢复中的90%的人在两年后保持清醒。《美国残疾人法》(ADA)的第二章涵盖了州和地方政府提供的计划和服务,包括惩教设施。在ADA下,惩教设施必须对政策和做法进行合理修改,以允许康复中的囚犯能够使用MAT。在这篇文章中,我们讨论ADA如何适用于惩教设施以及MAT对OUD患者的影响。
    Studies estimate that least 65% of people incarcerated in the United States have Substance Use Disorder (SUD). Medication Assisted Treatment (MAT) is a proven effective treatment for Opioid Use Disorder (OUD). MAT reduces the number of people who die each year from OUD by fifty percent and ninety percent of individuals in recovery maintain sobriety after two years. Title II of the Americans with Disabilities Act (ADA) covers the programs and services provided by state and local governments including correctional facilities. Under the ADA, correctional facilities must make reasonable modification to policies and practice to allow inmates in recovery to have access to MAT. In this article, we discuss how the ADA applies to correctional facilities and the impact that MAT has for people who have OUD.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    背景:考虑到缩小牙科奖学金性别差距的证据,这项研究评估了女性作为作者的参与,审稿人,以及2000年至2022年的《美国牙科协会杂志》(JADA)编辑委员会成员。
    方法:研究作者从PubMed下载作者姓名,并从JADA页面检索审稿人和编辑委员会成员的姓名。作者使用Gender-API软件根据名字确定性别。他们使用逻辑回归来测试趋势。
    结果:从2000年1月到2022年12月,有2,935篇全长文章,2,775名审稿人,4主编,和85名编辑委员会成员。女性作者的百分比每年增加1.2%(95%CI,1.03%至1.33%),2022年达到47%。第一作者每年增长2.1%(95%CI,1.84%至2.39%),自2016年以来一直超过50%。在有多个作者的文章中,有适度的增加;第二作者每年增加0.7%(95%CI,0.36%至1.09%),最后作者增加0.7%(95%CI,0.03%至1.00%)。女性审稿人每年增长0.8%(95%CI,0.68%至0.97%),但编委会中的女性比例没有显著增加,2022年为41%.
    结论:预计到2024年,50%的JADA作者将是女性。然而,妇女在编辑委员会中的代表性仍然不足。需要全面努力培养榜样,为女性提供指导机会,并支持妇女在牙科研究和出版物方面的专业进步。
    结论:基于性别的差异影响女性在牙科教育和临床实践中的工作。担任编辑委员会成员,审阅者,或作者可以影响学术推广和正在进行的科学研究的类型,并间接影响女性的健康结果。
    BACKGROUND: Considering evidence of closing the gender gap in dental scholarship, this study assessed women\'s participation as authors, reviewers, and members of the editorial board for The Journal of the American Dental Association (JADA) from 2000 through 2022.
    METHODS: The study authors downloaded author names from PubMed and retrieved names of reviewers and editorial board members from JADA\'s pages. The authors used Gender-API software to determine gender on the basis of first names. They used logistic regression to test for trends.
    RESULTS: From January 2000 through December 2022, there were 2,935 full-length articles, 2,775 reviewers, 4 editors in chief, and 85 editorial board members. The percentage of women authors increased by 1.2% annually (95% CI, 1.03% to 1.33%), reaching 47% in 2022. First authorship increased by 2.1% annually (95% CI, 1.84% to 2.39%) and has been at more than 50% since 2016. In articles with multiple authors, there was a modest increase; second authorship increased 0.7% annually (95% CI, 0.36% to 1.09%) and last authorship by 0.7% (95% CI, 0.03% to 1.00%). Women reviewers increased 0.8% annually (95% CI, 0.68% to 0.97%), but the percentage of women on the editorial board did not increase significantly and was 41% in 2022.
    CONCLUSIONS: It was anticipated that 50% of JADA authors would be women by 2024. However, women are still underrepresented on the editorial board. A comprehensive effort is needed to foster role models, provide mentorship opportunities for women, and support women\'s professional advancement in dental research and publications.
    CONCLUSIONS: Gender-based disparities affect women in dental education and clinical practice. Serving as an editorial board member, reviewer, or author can affect academic promotion and the type of scientific investigation being conducted and indirectly affects women\'s health outcomes.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

  • 文章类型: Journal Article
    嵌合抗原受体(CAR)T细胞疗法在实体瘤治疗中由于免疫抑制性肿瘤微环境和次优T细胞持久性而受阻。当前的策略没有解决微环境中的营养竞争。因此,我们提出了一种使用肌苷作为替代燃料的代谢加油方法。CART细胞被工程化以表达膜结合的CD26和胞质腺苷脱氨酶1(ADA1),将腺苷转化为肌苷。自分泌的ADA1在CD3/CD26刺激激活CART细胞,改善迁移和对转化生长因子β1抑制的抗性。ADA1与抗CD3scFv的融合进一步促进肌苷产生并使肿瘤细胞摄食最小化。在肝细胞癌和非小细胞肺癌的小鼠模型中,与未修饰的CART细胞相比,代谢加油的CART细胞表现出优异的肿瘤减少。总的来说,我们的研究强调了选择性肌苷加油增强CART治疗实体瘤疗效的潜力.
    Chimeric antigen receptor (CAR) T cell therapy is hindered in solid tumor treatment due to the immunosuppressive tumor microenvironment and suboptimal T cell persistence. Current strategies do not address nutrient competition in the microenvironment. Hence, we present a metabolic refueling approach using inosine as an alternative fuel. CAR T cells were engineered to express membrane-bound CD26 and cytoplasmic adenosine deaminase 1 (ADA1), converting adenosine to inosine. Autocrine secretion of ADA1 upon CD3/CD26 stimulation activates CAR T cells, improving migration and resistance to transforming growth factor β1 suppression. Fusion of ADA1 with anti-CD3 scFv further boosts inosine production and minimizes tumor cell feeding. In mouse models of hepatocellular carcinoma and non-small cell lung cancer, metabolically refueled CAR T cells exhibit superior tumor reduction compared to unmodified CAR T cells. Overall, our study highlights the potential of selective inosine refueling to enhance CAR T therapy efficacy against solid tumors.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    免疫原性评估是药物开发的关键部分。来自多个卫生机构的监管指南为开发和验证抗药物抗体(ADA)测定以评估临床试验中的免疫原性提供了建议。这些建议主要描述了在一个支持生物治疗分子的生物分析实验室中运行的ADA方法;然而,有越来越多的情况下,可能需要在一个以上的实验室运行ADA方法的支持。一个项目可以迅速扩展到一个或多个国家的多个临床研究,支持该计划的最合适方法是让多个实验室进行ADA样品分析。此外,可能存在某些特定国家的挑战,这可能使将样品运输到国外进行分析不可行。例如,中国有一个漫长的样本出口过程,有可能对研究时间表产生负面影响。如果多个实验室使用相同的ADA方法分析样品,应建立可比的方法性能。这里,我们描述了美国的两个生物分析实验室和中国的一个实验室对ADA测定可比性的三向评估.
    Immunogenicity evaluation is a critical part of drug development. Regulatory guidelines from multiple health agencies provide recommendations for the development and validation of anti-drug antibody (ADA) assays to assess immunogenicity in clinical trials. These recommendations primarily describe an ADA method run in one bioanalytical laboratory supporting a biotherapeutic molecule; however, there are increasing instances that may necessitate the support of the ADA method being run in more than one laboratory. A program can rapidly expand into multiple clinical studies within one or multiple countries, where the most appropriate way to support the program is by having multiple laboratories perform ADA sample analysis. In addition, there may be certain country-specific challenges that may make it infeasible to transport samples outside of the country for analysis. China for example has a lengthy sample exportation process that has potential to negatively impact study timelines. If multiple laboratories analyze samples using the same ADA method, comparable method performance should be established. Here, we describe a three-way assessment of ADA assay comparability between two US-based bioanalytical laboratories and one based in China.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

  • 文章类型: Journal Article
    背景:先天性免疫错误(IEI)包括485种遗传性疾病,其特征是对威胁生命的传染病的易感性增加,自身免疫和恶性疾病在生命的头几年死亡率很高。严重的联合免疫缺陷是最严重的IEI,其检测应该是新生儿筛查(NBS)计划的主要目标。“可操作”一词最近被用于所有IEI,其结果可以通过早期专门干预得到明显改善。
    目的:评估在托斯卡纳地区(意大利)的IEI扩展NBS策略的结果,基于TREC(T细胞受体切除圈),KREC(Kappa重组切除圆)和基于串联质谱的测定。
    方法:这是一项回顾性研究,收集了2018年10月10日至2022年10月10日在托斯卡纳出生的所有婴儿的数据。串联质谱鉴定腺苷脱氨酶(ADA)和嘌呤核苷磷酸化酶(PNP)缺乏症,对新生儿Guthrie卡中的干血斑(DBS)进行了TREC和KREC分子分析。当第一次测试的结果超出诊断界限时,进行了新的DBS和免疫学家的评估。
    结果:评估了94,319名新生儿。本研究中TREC(0.031%)和KREC(0.074%)的转诊率与文献中的数据一致。扩大的NBS策略的结果显示,受影响的新生儿的发病率为1/9,431。
    结论:这项工作代表了对IEI的可持续和基于现实的扩展NBS计划的首次描述,该计划具有较高的诊断发生率,可促进对已识别患者的及时管理。
    BACKGROUND: Inborn errors of immunity (IEIs) include 485 inherited disorders characterized by an increased susceptibility to life-threatening infectious diseases, autoimmunity, and malignant diseases with a high mortality rate in the first years of life. Severe combined immunodeficiency is the most severe of the IEIs, and its detection should be a primary goal in a newborn screening (NBS) program. The term \"actionable\" has recently been used for all IEIs with outcomes that can be demonstrably improved through early specialized intervention.
    OBJECTIVE: To evaluate the results of the expanded NBS strategy for IEIs in Tuscany Region (Italy), based on T-cell receptor excision circle, kappa recombining excision circle, and tandem mass-based assays.
    METHODS: This is a retrospective study collecting data from all infants born in Tuscany from October 10, 2018, to October 10, 2022. Tandem mass assay to identify adenosine deaminase and purine nucleoside phosphorylase deficiency, together with T-cell receptor excision circle and kappa recombining excision circle molecular analysis, was conducted on dried blood spot from the newborns\' Guthrie Cards. A new dried blood spot and evaluation by an immunologist were carried out when the results of the first test were outside the diagnostic cutoffs.
    RESULTS: A total of 94,319 newborns were evaluated. Referral rates for T-cell recombining excision circles (0.031%) and kappa recombining excision circles (0.074%) in this study are in line with the data available in literature. The results from the expanded NBS strategy revealed an incidence rate of 1 per 9431 affected newborns.
    CONCLUSIONS: This work represents the first description of a sustainable and real-life-based expanded NBS program for IEIs with a high diagnostic incidence facilitating prompt management of identified patients.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

  • 文章类型: Journal Article
    尽管检查点抑制剂(CPIs)改善了转移性黑色素瘤患者的预后,那些在CPIs上取得进展的患者的治疗选择有限。为了解决这种未满足的需求并克服CPI抵抗机制,新的免疫疗法,例如T细胞接合剂,正在开发中。这些药物的使用有时受到抗药物抗体(ADAs)形式的免疫反应的限制。这对临床前预测具有挑战性,并可能导致药物的中和和功效丧失。
    TYRP1-TCB(RO7293583;RG6232)是靶向酪氨酸酶相关蛋白1(TYRP1)的T细胞接合双特异性(TCB)抗体,在许多黑色素瘤中表达,从而指导T细胞杀死表达TYRP1的肿瘤细胞。临床前研究表明TYRP1-TCB具有有效的抗肿瘤活性。这项首次在人(FIH)1期剂量递增研究的特点是安全性,耐受性,最大耐受剂量/最佳生物剂量,转移性黑色素瘤患者中TYRP1-TCB的药代动力学(PK)(NCT04551352)。
    20位皮肤参与者,葡萄膜,或粘膜TYRP1阳性黑色素瘤接受递增剂量的TYRP1-TCB(0.045-0.4mg).所有参与者都经历了≥1次治疗相关不良事件(TRAE);两名参与者经历了3级TRAE。最常见的毒性是1-2级细胞因子释放综合征(CRS)和皮疹。分段给药减轻CRS,并与白细胞介素-6和肿瘤坏死因子-α水平降低相关。活性药物(双重TYPR1-和CD3-结合)PK的测量迅速确定了在至少3个周期的固定给药方案中以0.4mg治疗的所有参与者中活性药物暴露的损失。暴露的丧失与ADA向TYRP1和CD3结构域的发展有关。总药物PK测定,测量自由和ADA绑定形式,证明TYRP1-TCB-ADA免疫复合物存在于参与者样本中,但在体外没有显示药物活性。
    这项研究为如何使用活性药物PK测定法提供了重要的见解,再加上机械跟进,可以为参与FIH剂量递增试验的个体提供信息并进行持续的获益/风险评估。翻译研究导致更好地理解同源T细胞和B细胞相互作用的潜在生物学,最终导致ADA发展为新型生物治疗剂,是需要的。
    UNASSIGNED: Although checkpoint inhibitors (CPIs) have improved outcomes for patients with metastatic melanoma, those progressing on CPIs have limited therapeutic options. To address this unmet need and overcome CPI resistance mechanisms, novel immunotherapies, such as T-cell engaging agents, are being developed. The use of these agents has sometimes been limited by the immune response mounted against them in the form of anti-drug antibodies (ADAs), which is challenging to predict preclinically and can lead to neutralization of the drug and loss of efficacy.
    UNASSIGNED: TYRP1-TCB (RO7293583; RG6232) is a T-cell engaging bispecific (TCB) antibody that targets tyrosinase-related protein 1 (TYRP1), which is expressed in many melanomas, thereby directing T cells to kill TYRP1-expressing tumor cells. Preclinical studies show TYRP1-TCB to have potent anti-tumor activity. This first-in-human (FIH) phase 1 dose-escalation study characterized the safety, tolerability, maximum tolerated dose/optimal biological dose, and pharmacokinetics (PK) of TYRP1-TCB in patients with metastatic melanoma (NCT04551352).
    UNASSIGNED: Twenty participants with cutaneous, uveal, or mucosal TYRP1-positive melanoma received TYRP1-TCB in escalating doses (0.045 to 0.4 mg). All participants experienced ≥1 treatment-related adverse event (TRAE); two participants experienced grade 3 TRAEs. The most common toxicities were grade 1-2 cytokine release syndrome (CRS) and rash. Fractionated dosing mitigated CRS and was associated with lower levels of interleukin-6 and tumor necrosis factor-alpha. Measurement of active drug (dual TYPR1- and CD3-binding) PK rapidly identified loss of active drug exposure in all participants treated with 0.4 mg in a flat dosing schedule for ≥3 cycles. Loss of exposure was associated with development of ADAs towards both the TYRP1 and CD3 domains. A total drug PK assay, measuring free and ADA-bound forms, demonstrated that TYRP1-TCB-ADA immune complexes were present in participant samples, but showed no drug activity in vitro.
    UNASSIGNED: This study provides important insights into how the use of active drug PK assays, coupled with mechanistic follow-up, can inform and enable ongoing benefit/risk assessment for individuals participating in FIH dose-escalation trials. Translational studies that lead to a better understanding of the underlying biology of cognate T- and B-cell interactions, ultimately resulting in ADA development to novel biotherapeutics, are needed.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

公众号