Leveraging novel methods to improve nonsyndromic cleft lip/palate gene discovery

项目总结 在这项提案中，我们将对全基因组测序(WGS)数据应用稳健的分析方法[获得 来自我们的X01 Gabriella Miller First(GMKF)资助的数据集]来自20个多代人的大型家庭 西班牙裔和非西班牙裔白人种族，以单独和共同识别变异，有助于 非综合征型唇腭裂(NSCLP)。NSCLP是一种常见的出生缺陷，每年影响大约 全球每年有135,000名新生儿。尽管治疗方法有所改进，但NSCLP强制实施了重大的医疗、 对受影响的个人及其家庭造成的心理社会和经济负担。NSCLP是复杂的，由以下原因引起 遗传和环境因素及其相互作用。据估计，约25%的遗传风险 NSCLP已被发现；然而，大多数已识别的变异反映了常见的、适度的风险变异--通常 位于基因组的非编码区。最近，有人提出，失踪的一部分 NSCLP的遗传性在于罕见的、高风险的变异，独立地或通过与常见变异的相互作用而存在。 这些观察结果突显了NSCLP的复杂性和破解风险等位基因的难度，并可能解释 研究之间缺乏一致的发现。在这份提案中，我们将选择20个信息丰富的大家庭 通过X01机制对WGS进行测序，并进行全基因组连锁和关联，以及 知情分析，以评估罕见和常见的基因变异对家族性非小细胞肺癌的贡献。在支持中 在我们提出的方法中，我们有令人兴奋和稳健的初步数据显示，识别出一种罕见的 在一个大的多基因家系中与NSCLP进行变异分离，这种变异可能被常见的风险变异所改变 影响基因的外显性。此外，我们发现该变异是一个零等位基因，并导致 模仿NSCLP的头面部切迹。这些发现证明了我们方法的优势和高 发现新的NSCLP基因/变体的可能性。本研究的结果将为今后的研究提供新的、重要的参考。 深入了解NSCLP的遗传结构，为更广泛地分析WGS奠定了基础 来自NSCLP家族的数据。这一结果还将为将来在函数中使用的假定因果变体提供信息 体外和体内的表征研究。最终，这项研究将为更好的风险奠定基础 对非小细胞肺癌患者及其家人的评估，可转化为更准确的复发风险 临床实践中的咨询。

PROJECT SUMMARY In this proposal, we will apply robust analytical approaches to whole genome sequencing (WGS) data [obtained from our X01 Gabriella Miller Kids First (GMKF)-funded dataset] from 20 large multigenerational families of Hispanic and nonHispanic white ethnicities to identify variants individually and in aggregate contributing to nonsyndromic cleft lip/palate (NSCLP). NSCLP is a common birth defect annually affecting approximately 135,000 newborns/year worldwide. Despite improvement in treatments, NSCLP imposes significant medical, psychosocial and financial burdens to affected individuals and their families. NSCLP is complex, caused by genetic and environmental factors, and their interactions. It is estimated that ~25% of the genetic liability for NSCLP has been uncovered; however, most of the identified variants reflect common, modest risk-variants often located in noncoding regions of the genome. More recently, it has been suggested that part of the missing heritability for NSCLP lies in rare, high-risk variants, independently or via interactions with common variants. These observations highlight the complexity of NSCLP and difficulty in unraveling risk alleles, and may explain the lack of consistent findings among studies. In this proposal, we will select 20 large and informative families sequenced (WGS) through the X01 mechanism and conduct genome-wide linkage and association, and PRS- informed analyses to assess the contribution of rare and common genetic variation to familial NSCLP. In support of our proposed approach, we have exciting and robust preliminary data showing the identification of a rare variant segregating with NSCLP in a large multiplex family that was modified by common risk variants likely impacting penetrance of the gene. Moreover, we showed that this variant was a null allele and resulted in craniofacial notching mimicking NSCLP. These findings demonstrate the strengths of our approach and the high potential for discovery of novel NSCLP genes/variants. The results of this study will provide novel and important insights about the genetic architecture of NSCLP and lay the foundation for more extensive analysis of WGS data from NSCLP families. The results will also inform putatively causal variants to be used in future functional characterization studies in vitro and in vivo. Ultimately, this study will provide the groundwork for better risk assessment for NSCLP individuals and their families that can be translated into more precise recurrence risk counseling in clinical practice.