polymorphisms

多态性
  • 文章类型: Journal Article
    单氨基酸多态性(SAP)或非同义单核苷酸变体(nsSNV)是最常见的遗传变异。它们起因于错义突变,其中单碱基对取代以这样的方式改变遗传密码,即在给定位置的碱基三联体(密码子)编码不同的氨基酸。由于基因突变有时会引起遗传疾病,重要的是要理解和预见哪些变异是有害的,哪些变异是中性的(不会引起表型的变化)。这可以作为分类问题。
    使用机器智能的计算方法正在逐渐取代重复和价格过高的诱变测试。总的来说,质量参差不齐,不足之处,nsSNV数据集的不规则性降低了基于人工智能的方法的便利性。随后,需要强有力和更精确的方法来解决这些问题。在目前的工作文件中,我们展示了一个建立在保持采样器上的共识分类器,它看起来强大而精确,超越了所有其他流行的方法。
    在训练阶段,我们制作了100个holdouts来测试不同分类器的结构和不同分类变量。选择性能最好的保留来开发共识分类器,并使用k倍(1≤k≤5)交叉验证方法进行测试。我们还研究了哪些蛋白质特性对nsSNV影响的精确预测具有最大的影响。
    我们的共识坚持采样器超越了其他流行的算法,并给出了出色的结果,精度高,标准偏差低。我们方法的优势来自使用保留树,其中不同的基于LM/AI的程序以不同的方式采样。
    UNASSIGNED: Single Amino Acid Polymorphisms (SAPs) or nonsynonymous Single Nucleotide Variants (nsSNVs) are the most common genetic variations. They result from missense mutations where a single base pair substitution changes the genetic code in such a way that the triplet of bases (codon) at a given position is coding a different amino acid. Since genetic mutations sometimes cause genetic diseases, it is important to comprehend and foresee which variations are harmful and which ones are neutral (not causing changes in the phenotype). This can be posed as a classification problem.
    UNASSIGNED: Computational methods using machine intelligence are gradually replacing repetitive and exceedingly overpriced mutagenic tests. By and large, uneven quality, deficiencies, and irregularities of nsSNVs datasets debase the convenience of artificial intelligence-based methods. Subsequently, strong and more exact approaches are needed to address these problems. In the present work paper, we show a consensus classifier built on the holdout sampler, which appears strong and precise and outflanks all other popular methods.
    UNASSIGNED: We produced 100 holdouts to test the structures and diverse classification variables of diverse classifiers during the training phase. The finest performing holdouts were chosen to develop a consensus classifier and tested using a k-fold (1 ≤ k ≤5) cross-validation method. We also examined which protein properties have the biggest impact on the precise prediction of the effects of nsSNVs.
    UNASSIGNED: Our Consensus Holdout Sampler outflanks other popular algorithms, and gives excellent results, highly accurate with low standard deviation. The advantage of our method emerges from using a tree of holdouts, where diverse LM/AI-based programs are sampled in diverse ways.
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  • 文章类型: Journal Article
    这项工作的目的是提供已经可以在肿瘤学临床实践中实施的种系药物遗传学的概述。已经提供了对确定应使用哪些遗传多态性所必需的三个支柱的解释。这些是PharmGKB单核苷酸多态性(SNP)-证据水平为1或2的药物临床注释;药物监管主要机构(食品和药物管理局和欧洲药品管理局,主要);以及国际专家联盟(主要是临床药物遗传学实施联盟和荷兰药物遗传学工作组)制定的指南。还汇编了有关SNP的摘要以及有关如何应用其结果的建议。
    The aim of this work was to supply an overview of the germline Pharmacogenetics that can be already implemented in the oncology clinical practice. An explanation of the three pillars considered necessary for determining which genetic polymorphisms should be used has been provided. These are PharmGKB single nucleotide polymorphism (SNP)-Drug Clinical Annotations with levels of evidence 1 or 2; the genetic information provided in the drug labels by the drug regulatory main agencies (Food and Drug Administration and European Medicines Agency, mainly); and the guidelines elaborated by international expert consortia (mainly Clinical Pharmacogenetics Implementation Consortium and Dutch Pharmacogenetics Working Group). A summary of the relevant SNPs and the recommendations on how to apply their results has also been compiled.
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  • 文章类型: Journal Article
    背景:与白人相比,APOL1变异体在黑人中导致ESKD的发病率明显较高。在患有肾病的非洲血统患者中对这些变异进行基因检测并不常见,目前尚无针对APOL1相关性肾病的特异性治疗或管理方案。
    方法:多学科,种族多样性的14名专家和患者倡导者参与了Delphi共识过程,为临床医生提供实用指导,这些临床医生照顾可能患有APOL1相关性肾病的患者.共识小组成员参加了三轮匿名投票,以制定与以下内容有关的共识声明:(1)咨询,基因分型,和诊断;(2)疾病的认识和教育;和(3)当治疗可用时,对未来APOL1相关肾病的管理的愿景。对MEDLINE和Embase数据库进行了系统的文献检索,以确定2009年1月1日至2020年7月14日发表的相关证据。
    结果:共识小组达成了55项共识声明,涵盖人口统计学和临床因素等主题,表明患者患有APOL1相关性肾病,以及咨询的关键考虑因素,测试,和当前临床实践中的诊断。他们达成共识,认为有必要提高主要利益相关者对肾脏疾病和APOL1相关肾病的种族健康差异的认识,以及成功的教育计划的特征,以提高患者社区的认识。该小组还强调了对特定治疗的未满足需求,并商定了在治疗可用时管理这些患者的最佳实践。
    结论:由多学科专家和患者倡导者组成的小组就可能患有APOL1相关性肾病的患者的护理制定了基于共识的指导。
    BACKGROUND: APOL1 variants contribute to the markedly higher incidence of ESKD in Blacks compared with Whites. Genetic testing for these variants in patients with African ancestry who have nephropathy is uncommon, and no specific treatment or management protocol for APOL1-associated nephropathy currently exists.
    METHODS: A multidisciplinary, racially diverse group of 14 experts and patient advocates participated in a Delphi consensus process to establish practical guidance for clinicians caring for patients who may have APOL1-associated nephropathy. Consensus group members took part in three anonymous voting rounds to develop consensus statements relating to the following: (1) counseling, genotyping, and diagnosis; (2) disease awareness and education; and (3) a vision for management of APOL1-associated nephropathy in a future when treatment is available. A systematic literature search of the MEDLINE and Embase databases was conducted to identify relevant evidence published from January 1, 2009 to July 14, 2020.
    RESULTS: The consensus group agreed on 55 consensus statements covering such topics as demographic and clinical factors that suggest a patient has APOL1-associated nephropathy, as well as key considerations for counseling, testing, and diagnosis in current clinical practice. They achieved consensus on the need to increase awareness among key stakeholders of racial health disparities in kidney disease and of APOL1-associated nephropathy and on features of a successful education program to raise awareness among the patient community. The group also highlighted the unmet need for a specific treatment and agreed on best practice for management of these patients should a treatment become available.
    CONCLUSIONS: A multidisciplinary group of experts and patient advocates defined consensus-based guidance on the care of patients who may have APOL1-associated nephropathy.
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